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Université du Québec à Montréal
1.
Viret, Pierre Clément.
Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique.
Degree: 2012, Université du Québec à Montréal
URL: http://www.archipel.uqam.ca/5469/1/M12658.pdf
Aucun résumé disponible
______________________________________________________________________________
Subjects/Keywords: Enfant; Habileté motrice; Leucémie aiguë lymphoblastique
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APA (6th Edition):
Viret, P. C. (2012). Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique. (Thesis). Université du Québec à Montréal. Retrieved from http://www.archipel.uqam.ca/5469/1/M12658.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Viret, Pierre Clément. “Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique.” 2012. Thesis, Université du Québec à Montréal. Accessed February 28, 2021.
http://www.archipel.uqam.ca/5469/1/M12658.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Viret, Pierre Clément. “Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique.” 2012. Web. 28 Feb 2021.
Vancouver:
Viret PC. Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique. [Internet] [Thesis]. Université du Québec à Montréal; 2012. [cited 2021 Feb 28].
Available from: http://www.archipel.uqam.ca/5469/1/M12658.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Viret PC. Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique. [Thesis]. Université du Québec à Montréal; 2012. Available from: http://www.archipel.uqam.ca/5469/1/M12658.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université du Québec à Montréal
2.
Viret, Pierre Clément.
Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique.
Degree: 2012, Université du Québec à Montréal
URL: http://archipel.uqam.ca/5469/1/M12658.pdf
Aucun résumé disponible
______________________________________________________________________________
Subjects/Keywords: Enfant; Habileté motrice; Leucémie aiguë lymphoblastique
Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Viret, P. C. (2012). Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique. (Thesis). Université du Québec à Montréal. Retrieved from http://archipel.uqam.ca/5469/1/M12658.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Viret, Pierre Clément. “Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique.” 2012. Thesis, Université du Québec à Montréal. Accessed February 28, 2021.
http://archipel.uqam.ca/5469/1/M12658.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Viret, Pierre Clément. “Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique.” 2012. Web. 28 Feb 2021.
Vancouver:
Viret PC. Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique. [Internet] [Thesis]. Université du Québec à Montréal; 2012. [cited 2021 Feb 28].
Available from: http://archipel.uqam.ca/5469/1/M12658.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Viret PC. Évaluation des habiletés motrices globales chez les enfants ayant été atteint de la leucémie aigue lymphoblastique. [Thesis]. Université du Québec à Montréal; 2012. Available from: http://archipel.uqam.ca/5469/1/M12658.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Rochester
3.
Person, Steven M.
Optical methods for nanoparticle detection and
imaging.
Degree: PhD, 2014, University of Rochester
URL: http://hdl.handle.net/1802/28897
► As the size of particulate matter decreases, individual particles are both more difficult to detect and show unique scattering properties. This thesis presents methods for…
(more)
▼ As the size of particulate matter decreases,
individual particles are both more
difficult to detect and show
unique scattering properties. This thesis presents methods
for
optically detecting and imaging single nanoparticles and
demonstrates the
directional scattering properties of
semiconductor nanoparticles. The first section describes
a
real-time interferometric method using multiple wavelengths to both
detect
and classify single nanoparticles in solution. A mixture of
colloidal 60nm diameter
Ag and 80nm diameter Au nanoparticles are
identified within a 1 ms detection
window. Detection sensitivity
is limited by phase variations in the signal and two
phase
sensitive interferometric measurement techniques are proposed to
improve the
performance.
In the second part of the thesis, GaAs
nanoparticles are fabricated on a fused silica
substrate using
epitaxial lift-o and e-beam lithography. Recent theoretical work
has
predicted a suppression in the backscattering intensity in
high refractive index semiconductor
nanoparticles caused by
interference between electric and magnetic dipole
Mie resonances.
Measurements of the fabricated GaAs particles show a suppressed
backscattering at λ = 725nm agreeing with the modeled scattering
properties and
providing the first experimental verification of
dipole interference in the visible spectrum.
Potential
applications for these highly directional scatterers include
structured
anti-reflection coatings and low-loss optical antennas
for enhancing magnetic dipole
interactions.
Finally, a
point-scanning confocal microscopy system is developed using a
diamond
turned ellipsoidal mirror, with a numerical aperture of
~1, as an illumination
and collection objective. The focal
properties are modeled using the Richards-Wolf
integrals and
alignment challenges are discussed. The imaging system wavefront
performance
is measured in an interferometer and the expected
aberrated focal spot is
simulated. A 40nm fluorescent nanoparticle
is raster scanned through the focus to
verify the measured
performance. The tested system is the first confocal microscope
implementing an ellipsoidal mirror as an imaging objective and
provides high resolution,
chromatic aberration free imagery of
nanoparticles and nanostructures on
opaque substrates. An
additional spherical reference surface is proposed to monitor
and
simplify the system alignment.
Subjects/Keywords: Interferometry; Mie theory; Nanoparticle; Scattering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Person, S. M. (2014). Optical methods for nanoparticle detection and
imaging. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/28897
Chicago Manual of Style (16th Edition):
Person, Steven M. “Optical methods for nanoparticle detection and
imaging.” 2014. Doctoral Dissertation, University of Rochester. Accessed February 28, 2021.
http://hdl.handle.net/1802/28897.
MLA Handbook (7th Edition):
Person, Steven M. “Optical methods for nanoparticle detection and
imaging.” 2014. Web. 28 Feb 2021.
Vancouver:
Person SM. Optical methods for nanoparticle detection and
imaging. [Internet] [Doctoral dissertation]. University of Rochester; 2014. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1802/28897.
Council of Science Editors:
Person SM. Optical methods for nanoparticle detection and
imaging. [Doctoral Dissertation]. University of Rochester; 2014. Available from: http://hdl.handle.net/1802/28897

Oregon State University
4.
Spinrad, Richard W.
Experimental and theoretical measurements of the particulate volume scattering function at near forward angles.
Degree: MS, Oceanography, 1978, Oregon State University
URL: http://hdl.handle.net/1957/28194
Subjects/Keywords: Mie scattering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Spinrad, R. W. (1978). Experimental and theoretical measurements of the particulate volume scattering function at near forward angles. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/28194
Chicago Manual of Style (16th Edition):
Spinrad, Richard W. “Experimental and theoretical measurements of the particulate volume scattering function at near forward angles.” 1978. Masters Thesis, Oregon State University. Accessed February 28, 2021.
http://hdl.handle.net/1957/28194.
MLA Handbook (7th Edition):
Spinrad, Richard W. “Experimental and theoretical measurements of the particulate volume scattering function at near forward angles.” 1978. Web. 28 Feb 2021.
Vancouver:
Spinrad RW. Experimental and theoretical measurements of the particulate volume scattering function at near forward angles. [Internet] [Masters thesis]. Oregon State University; 1978. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1957/28194.
Council of Science Editors:
Spinrad RW. Experimental and theoretical measurements of the particulate volume scattering function at near forward angles. [Masters Thesis]. Oregon State University; 1978. Available from: http://hdl.handle.net/1957/28194

Universitat Politècnica de València
5.
Manin ., Julien Luc.
ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS
.
Degree: 2011, Universitat Politècnica de València
URL: http://hdl.handle.net/10251/10189
► Desde su introducción, los motores de combustión interna alternativos han sido desarrollados con el fin de reducir el consumo y mejorar el rendimiento y facilidad…
(more)
▼ Desde su introducción, los motores de combustión interna alternativos han sido desarrollados con el fin de reducir el consumo y mejorar el rendimiento y facilidad de conducción. Con el tiempo, la contaminación se ha convertido en un factor crítico para los gobiernos y como consecuencia se han introducido regulaciones para reducir las emisiones contaminantes de los motores.
Con el constante progreso tecnológico requerido por las normas contra la contaminación, la inyección directa se ha vuelto indispensable en cuanto a los motores Diesel. La introducción de combustible en la cámara de combustión permite un alto nivel de control sobre la liberación de energía del proceso de combustión. Con las novedosas estrategias de combustión empleadas, el proceso de inyección se ha convertido en el tema principal y el chorro es el factor principal.
El trabajo realizado a lo largo de este estudio para analizar el proceso de mezcla aire-combustible se basa en el desarrollo de técnicas láser de diagnóstico. Inicialmente, la inyección de Diesel se ha estudiado en una atmósfera isoterma para evitar la evaporación del combustible (dodecano) a través del uso de una iluminación estructurada para medir la distribución de la mezcla mediante el control de la dispersión de
Mie. La aplicación de la dispersión de Rayleigh en la parte evaporada del chorro inyectado en una cámara a alta temperatura ha permitido la obtención de la distribución de combustible en una situación equivalente a la existente en un motor real.
El análisis y comparación de los distintos parámetros del chorro inyectado en condiciones de baja o alta temperatura da la posibilidad de entender mejor lo que es el proceso de mezcla en los motores Diesel. Por otra parte, según el estado del fluido inyectado, líquido o gaseoso, las condiciones experimentales tendrán diferentes efectos y la mezcla aire-combustible también tendrá un comportamiento distinto.
Advisors/Committee Members: Payri Marín, Raúl (advisor).
Subjects/Keywords: Spray;
Diesel;
Mie;
Rayleigh
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Manin ., J. L. (2011). ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS
. (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/10189
Chicago Manual of Style (16th Edition):
Manin ., Julien Luc. “ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS
.” 2011. Doctoral Dissertation, Universitat Politècnica de València. Accessed February 28, 2021.
http://hdl.handle.net/10251/10189.
MLA Handbook (7th Edition):
Manin ., Julien Luc. “ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS
.” 2011. Web. 28 Feb 2021.
Vancouver:
Manin . JL. ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS
. [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2011. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10251/10189.
Council of Science Editors:
Manin . JL. ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS
. [Doctoral Dissertation]. Universitat Politècnica de València; 2011. Available from: http://hdl.handle.net/10251/10189

Texas A&M University
6.
Allen, Adam L.
Modeling scattered intensities for multiple particle TIRM using Mie theory.
Degree: MS, Biomedical Engineering, 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-1738
► Single particle TIRM experiments measure particle-surface separation distance by tracking scattered intensities. The scattered light is generated by an evanescent wave interacting with a levitating…
(more)
▼ Single particle TIRM experiments measure particle-surface separation distance by
tracking scattered intensities. The scattered light is generated by an evanescent wave
interacting with a levitating microsphere. The exponential decay of the evanescent wave,
normal to the surface, results in scattered intensities that vary with separation distance.
Measurement of the separation distance allows us to calculate the total potential energy
profile acting on the particles. These experiments have been shown to exhibit nanometer
spatial resolution and the ability to detect potentials on the order of kT with no external
treatment of the particle. We find that the separation distance is a function of the decay
of the evanescent wave and the size of the sphere. Different sizes of spheres, located the
same distance from the surface, exhibit varying scattered intensity distributions.
Single particles have been studied extensively but multiple particle experiments
are needed for studies of more complex systems and surfaces. Increasing the number of
colloidal particles in a TIRM experiment greatly increases the complexity of the system.
Calculation of separation distances and potentials over a large group of microspheres
requires that the spheres display a uniform stuck-particle intensity distribution. But, for
large numbers of particles, this is not the case. In some instances, stuck-particle
intensities can vary more than an order of magnitude. This research involves creating a mathematical model to study scattered intensity
distributions for a large size range of polystyrene microspheres. The model is based on
basic
Mie theory. We compare the theoretically simulated results to the experimentally
obtained results and find that scattered intensity variations in multiple particle TIRM
experiments are attributed to particle polydispersity (particle size variation). This is a
very important result because we know that if we can maintain a relatively uniform
particle size distribution, then we will see a relatively uniform stuck-particle intensity
distribution. The model can then be used to select a size range of microspheres that will
exhibit a more uniform distribution so as to increase the sensitivity and feasibility of
multiple particle TIRM.
Advisors/Committee Members: Meissner, Kenith (advisor), Bevan, Michael A. (committee member), Cote, Gerard L. (committee member).
Subjects/Keywords: Mie; TIRM; Polydispersity
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Allen, A. L. (2009). Modeling scattered intensities for multiple particle TIRM using Mie theory. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1738
Chicago Manual of Style (16th Edition):
Allen, Adam L. “Modeling scattered intensities for multiple particle TIRM using Mie theory.” 2009. Masters Thesis, Texas A&M University. Accessed February 28, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-1738.
MLA Handbook (7th Edition):
Allen, Adam L. “Modeling scattered intensities for multiple particle TIRM using Mie theory.” 2009. Web. 28 Feb 2021.
Vancouver:
Allen AL. Modeling scattered intensities for multiple particle TIRM using Mie theory. [Internet] [Masters thesis]. Texas A&M University; 2009. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1738.
Council of Science Editors:
Allen AL. Modeling scattered intensities for multiple particle TIRM using Mie theory. [Masters Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1738

University of Tasmania
7.
Russell, PS.
Microbubble disperse flows about a lifting surface.
Degree: 2020, University of Tasmania
URL: Russell,
PS
ORCID:
0000-0001-5320-7222
<https://orcid.org/0000-0001-5320-7222>
2020
,
'Microbubble
disperse
flows
about
a
lifting
surface',
PhD
thesis,
University
of
Tasmania.
► The formation, size and concentration of microbubbles generated in the wake of a cavitating hydro-foil were investigated experimentally in a variable pressure water tunnel for…
(more)
▼ The formation, size and concentration of microbubbles generated in the wake of a cavitating hydro-foil were investigated experimentally in a variable pressure water tunnel for several Reynolds and cavitation numbers, with and without freestream nuclei. In the absence of freestream nuclei, interactions between the cavity, the overlying boundary layer and associated interfacial effects were invesigated qualitatively and quantitatively using a combination of still and high speed photography. The influence of these features on the physics of cavity breakup and condensation, and subsequent microbubble formation, were examined. Coherent spatial and temporal features of the sheet cavitation were found to be functions of both Reynolds and cavitation numbers. Long range microscopic shadowgraphy was used to measure the dense bubble populations present in the wake, and additionally implemented as a reference technique in the development of the Mie- Scattering Imaging (MSI) technique described below. For the range of microbubble sizes measured, concentrations are shown to increase with Reynolds number and reduce with decreasing cavitation number. The presence of freestream nuclei markedly alters cavity topology, and their effect on flow features and associated microbubble production was also evaluated. Wake microbubble concentrations were found to in-crease when low concentrations of nuclei were introduced but to then decrease with further increase in nuclei seeding. Regardless of seeding concentration, microbubble populations in the wake in-creased as the cavitation number was reduced. For high cavitation numbers the increase in concentration is primarily in bubbles of smaller size, whereas the increase in wake concentration at lower cavitation numbers occurs over a greater size range. These experiments demonstrate the im-portance of cavitation nuclei measurement in hydrodynamic test facilities. Application of an interferometric technique known as Mie- Scattering Imaging (MSI) for the measurement of sparse nuclei seeding populations in such facilities has been developed. A separate pressure chamber, with similar optical path properties to the tunnel test section, was used to develop the technique. Monodisperse bubbles (with diameters between 30 and 150 ➭m) were generated by a microfluidic ‘T’ junction, and individual bubbles were simultaneously imaged with shadowgraphy and MSI. In develop-ment of the MSI technique, approximations from Lorenz-Mie theory were experimentally validated, and the influence of fringe uniformity and intensity for each polarisation (perpendicular or parallel) on measurement precision was investigated. Parallel polarisation was preferred for its more uniform fringe spacing despite a lower intensity. The inverse relation between fringe wavelength and bubble diameter was demonstrated at a measurement angle of 90➦. The wavelength of the scattered fringe pattern is predicted using Lorentz-Mie theory and the calibration constant for fringe spacing was obtained. A practical method for the calibration of a…
Subjects/Keywords: Cavitation; Microbubbles; Mie-Scattering Imaging; Nuclei measurement
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Russell, P. (2020). Microbubble disperse flows about a lifting surface. (Thesis). University of Tasmania. Retrieved from Russell, PS ORCID: 0000-0001-5320-7222 <https://orcid.org/0000-0001-5320-7222> 2020 , 'Microbubble disperse flows about a lifting surface', PhD thesis, University of Tasmania.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Russell, PS. “Microbubble disperse flows about a lifting surface.” 2020. Thesis, University of Tasmania. Accessed February 28, 2021.
Russell, PS ORCID: 0000-0001-5320-7222 <https://orcid.org/0000-0001-5320-7222> 2020 , 'Microbubble disperse flows about a lifting surface', PhD thesis, University of Tasmania..
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Russell, PS. “Microbubble disperse flows about a lifting surface.” 2020. Web. 28 Feb 2021.
Vancouver:
Russell P. Microbubble disperse flows about a lifting surface. [Internet] [Thesis]. University of Tasmania; 2020. [cited 2021 Feb 28].
Available from: Russell, PS ORCID: 0000-0001-5320-7222 <https://orcid.org/0000-0001-5320-7222> 2020 , 'Microbubble disperse flows about a lifting surface', PhD thesis, University of Tasmania..
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Russell P. Microbubble disperse flows about a lifting surface. [Thesis]. University of Tasmania; 2020. Available from: Russell, PS ORCID: 0000-0001-5320-7222 <https://orcid.org/0000-0001-5320-7222> 2020 , 'Microbubble disperse flows about a lifting surface', PhD thesis, University of Tasmania.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
8.
Yaacoub, Rouba.
Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages : Tunneling optical resonances in atmospheric optics : application to cloud droplet spaceborne observations.
Degree: Docteur es, Terre, enveloppes fluides, 2020, Université Lille I – Sciences et Technologies
URL: http://www.theses.fr/2020LIL1R001
► L'interaction de la lumière avec un diffuseur homogène diélectrique sphérique (par exemple une gouttelette d'eau) de caractéristiques connues (diamètre, indice optique) est traité, en optique…
(more)
▼ L'interaction de la lumière avec un diffuseur homogène diélectrique sphérique (par exemple une gouttelette d'eau) de caractéristiques connues (diamètre, indice optique) est traité, en optique atmosphérique, par la théorie de Mie. Cette théorie sert aussi en télédétection pour calculer les propriétés physiques des diffuseurs (problème inverse). Des études récentes ont suggéré fortement qu'un effet tunnel pourrait être important en optique atmosphérique. Une manifestation de cet effet tunnel est la gloire atmosphérique qui est l'irisation circulaire qui se forme autour de l'ombre projetée d'un objet sur un nuage de gouttelettes d'eau. Précisément, la lumière pénètre par effet tunnel dans la gouttelette d'eau et excite résonances aiguës. Selon ces études, la théorie de Mie, telle qu'utilisée en optique atmosphérique, semble négliger ces effets. Nous avons désigné ces resonances par l'acronyme TOR (en anglais: Tunneling Optical Resonance). Dans cette thèse, nous montrons que les TOR peuvent être identifié en utilisant l'équation de Shrödinger à une dimension en introduisant une énergie potentielle effective qui caractérise l'interaction lumière-gouttelette et qui dépend de l'indice optique du diamètre de la gouttelette et de l'énergie incidente. Le premier objectif de cette thèse est d'identifier le concept de l'effet tunnel et montrer la nécessité de l'introduire dans la théorie de Mie. Afin d'atteindre cet objectif, une nouvelle méthode (méthode de la matrice de transfert – TMM) est développée pour prendre en considération les TOR et identifier les conditions pour lesquelles TOR se produisent. Le deuxième objectif est de comparer cette méthode à celle de la théorie de Mie et d'illustrer les différences entre eux. Nos résultats montrent la similarité entre les deux méthodes en l'absence de TOR et un désaccord autrement. Cette étude est effectuée pour deux cas différents: (1) une seule gouttelette d'eau de diamètre bien déterminée et une énergie incidente précise; (2) une population de gouttelettes de nuage avec un intervalle de diamètres de 5 micron jusqu'à 30 microns pour les énergies incidentes des neuf canaux (de l'IR jusqu'à l'UV) du capteur POLDER. Pour les deux cas les sections efficaces (diffusion, extinction et absorption) et la distribution angulaire de l'intensité diffusée sont comparés en prenant compte les TOR et sans les considérer. Les résultats suggèrent un nouvel aspect pour l'interaction lumière-gouttelette en optique atmosphérique, ce qui pourrait affecter les algorithmes d'inversion en télédétection.
The light interaction with a homogeneous dielectric spherical scatterer (e.g. cloud droplet) of known characteristics (diameter, optical index) is treated, in atmospheric optics, by the Mie's theory. This theory serves, also, in remote sensing to retrieve physical properties of scatterers (inverse problem). Recent studies have showed the importance of tunneling effects in atmospheric optics. They have attribute the implication of tunneling effects in the atmospheric glory which is the circular…
Advisors/Committee Members: Pujol, Olivier (thesis director), Dubuisson, Philippe (thesis director).
Subjects/Keywords: Théorie de Mie; Gloire (phénomène optique); 551.565
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APA ·
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MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yaacoub, R. (2020). Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages : Tunneling optical resonances in atmospheric optics : application to cloud droplet spaceborne observations. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2020LIL1R001
Chicago Manual of Style (16th Edition):
Yaacoub, Rouba. “Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages : Tunneling optical resonances in atmospheric optics : application to cloud droplet spaceborne observations.” 2020. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed February 28, 2021.
http://www.theses.fr/2020LIL1R001.
MLA Handbook (7th Edition):
Yaacoub, Rouba. “Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages : Tunneling optical resonances in atmospheric optics : application to cloud droplet spaceborne observations.” 2020. Web. 28 Feb 2021.
Vancouver:
Yaacoub R. Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages : Tunneling optical resonances in atmospheric optics : application to cloud droplet spaceborne observations. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2020. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2020LIL1R001.
Council of Science Editors:
Yaacoub R. Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages : Tunneling optical resonances in atmospheric optics : application to cloud droplet spaceborne observations. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2020. Available from: http://www.theses.fr/2020LIL1R001
9.
Lecureux, Marie.
Modélisation électromagnétique pour le filtrage UV appliquée à la protection solaire : Electromagnetic model of sunscreens.
Degree: Docteur es, Optique, Photonique et Traitement d'Image, 2014, Ecole centrale de Marseille
URL: http://www.theses.fr/2014ECDM0009
► Une crème solaire, ayant pour objectif de filtrer les UV, est un système complexe, à plusieurs phases, contenant deux types de filtres : des filtres…
(more)
▼ Une crème solaire, ayant pour objectif de filtrer les UV, est un système complexe, à plusieurs phases, contenant deux types de filtres : des filtres dits chimiques - c'est-à-dire des molécules absorbantes - et des réflecteurs (comme le TiO2), protégeant par diffusion de la lumière. Afin d'évaluer l'efficacité des produits, des mesures d'indice de protection (IP ou SPF) existent ; la crème est placée in vivo sur différents phénotypes de peau ou in vitro sur un support plastique en PMMA.Afin de modéliser la protection solaire, nous avons cherché à connaitre la répartition de la crème sur son support. Nous avons pour cela utilisé l'OCT (Tomographie à Cohérence Optique) avec un support plastique métallisé, permettant d'améliorer le contraste des images.Ceci nous a alors permis, en connaissant les paramètres des différents filtres chimiques ou particulaires, de modéliser la transmission de la crème sur son support la peau ou le PMMA. Nous avons pour cela utilisé la méthode différentielle, une méthode de calcul de diffusion de la lumière permettant de traiter une structure bidimensionnelle.Nous avons alors pu comparer nos résultats de calcul avec des mesures de protection, étudier l'influence de quelques caractéristiques des particules comme la taille ou le matériau utilisé, ou bien encore évaluer l'effet de l'hydratation de la couche la plus externe de la peau sur la protection solaire. Nous avons par ailleurs cherché à améliorer la vitesse et le champ d'application des calculs en comparant les résultats obtenus par la méthode différentielle avec d'autres modèles (diffusion de la lumière par des tiges ou théorie de Mie).
Sunscreens, an emulsion of several phases, are used as UV filters in order to protect people from sun damages. Filters can be divided in two types: the chemical ones which are organic molecules that absorb selectively ultraviolet light and the physical ones (such as TiO2) which are inorganic particles that scatter and may absorb some of the UV radiation. The sunscreen quality is given by the sun protection factor (SPF), measured in vivo. In order to avoid long and complicated tests, a quick and simple in vitro method, using a plastic substrate, has been established, which gives an approximation of the SPF. In order to model the sunscreen protection, we had to evaluate the sunscreen distribution. We used an OCT (for Optical Coherence Tomography) device, after having spread a metallic thin on the substrate before applying the sunscreen. Theses images helped us to model the cream transmission on the skin or the plastic substrate, using the differential method which can calculate the scattering of light through a 2D structure.We then compared our results to measurements, but also studied the impact of several particles specifications, such as the size or the material of the particle, or study the effect of the skin hydration on the UV protection.Furthermore, we have compared our results to other calculation methods (Mie scattering or scattering by a set of parallel cylinders) in order to improve the…
Advisors/Committee Members: Deumié-Raviol, Carole (thesis director), Enoch, Stefan (thesis director).
Subjects/Keywords: Protection Solaire; Méthode Différentielle; Théorie de Mie; Sunscreen; Differential Method; Mie scattering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lecureux, M. (2014). Modélisation électromagnétique pour le filtrage UV appliquée à la protection solaire : Electromagnetic model of sunscreens. (Doctoral Dissertation). Ecole centrale de Marseille. Retrieved from http://www.theses.fr/2014ECDM0009
Chicago Manual of Style (16th Edition):
Lecureux, Marie. “Modélisation électromagnétique pour le filtrage UV appliquée à la protection solaire : Electromagnetic model of sunscreens.” 2014. Doctoral Dissertation, Ecole centrale de Marseille. Accessed February 28, 2021.
http://www.theses.fr/2014ECDM0009.
MLA Handbook (7th Edition):
Lecureux, Marie. “Modélisation électromagnétique pour le filtrage UV appliquée à la protection solaire : Electromagnetic model of sunscreens.” 2014. Web. 28 Feb 2021.
Vancouver:
Lecureux M. Modélisation électromagnétique pour le filtrage UV appliquée à la protection solaire : Electromagnetic model of sunscreens. [Internet] [Doctoral dissertation]. Ecole centrale de Marseille; 2014. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2014ECDM0009.
Council of Science Editors:
Lecureux M. Modélisation électromagnétique pour le filtrage UV appliquée à la protection solaire : Electromagnetic model of sunscreens. [Doctoral Dissertation]. Ecole centrale de Marseille; 2014. Available from: http://www.theses.fr/2014ECDM0009

Université de Grenoble
10.
Solanki, Amit.
Propriétés électriques et optiques des nanofils uniques de silicium : Electrical and optical properties of single silicon nanowires.
Degree: Docteur es, Physique, 2012, Université de Grenoble
URL: http://www.theses.fr/2012GRENY081
► Ce travail présente la caractérisation des propriétés d'absorption de lumière par des nanofils uniques (NF) de silicium en utilisant la spectroscopie de photocourant, ainsi qu'une…
(more)
▼ Ce travail présente la caractérisation des propriétés d'absorption de lumière par des nanofils uniques (NF) de silicium en utilisant la spectroscopie de photocourant, ainsi qu'une étude préliminaire des processus d'incorporation des dopants et de réalisation de jonction dans les NFs. Tout d'abord, nous commençons par décrire les méthodes de croissance utilisées pour synthétiser des NFs actifs pour la génération de photocourant, avec l'utilisation du chlorure d'hydrogène dans les procédés classiques de croissance CVD catalysée or de fils dopés. Cette méthode offre des structures très faiblement coniques, élargit les températures de procédé, permettant en particulier d'incorporer très efficacement le bore, avec des densités d'accepteurs ionisés allant jusqu'à 1.8E19 cm-3, tout en inhibant la diffusion d'or depuis le catalyseur. L'attention est ensuite portée à la fabrication de jonctions, l'étude de ses caractéristiques électriques, ainsi que sur l'influence de paramètres morphologiques (rayon, position axiale) du fil sur sa résistivité apparente. Dans une seconde partie, nous étudions la réponse en photocourant d'un jeu de NFs actifs de différents diamètres et corrélons nos résultats à un traitement analytique de l'absorption des photons à l'échelle du nanoobjet dans le cadre de la théorie de Mie adaptée au cas cylindrique. L'accord expérience-théorie est très bon pour les deux polarisations (TE-TM). Des résonances dans le spectre d'absorption sont mises en évidence, correspondant à l'excitation de modes propres du fil, et associées à des sections efficaces d'absorption pouvant être supérieures à l'unité. Dans une dernière partie, nous adaptons la stratégie de dépôt antireflet utilisée dans les cellules solaires pour améliorer le couplage de la lumière incidente aux NFs. Pour cela, des dépôts de SiO2 et Si3N4 sont réalisés sur des NFs via la technique de PECVD, nous fournissant par là-même un jeu de structures pourvues d'un dépôt de diélectrique à haute conformité. Se basant sur les spectres d'absorption ainsi acquis, nous obtenons les gains relatifs d'absorption induits par le dépôt de diélectrique et les comparons aux calculs analytiques développés spécifiquement pour obtenir l'absorption dans le cœur seulement du cylindre coaxial, ceci nous permettant également d'estimer la partie du rayonnement incident absorbé dans la coquille diélectrique.
In this work we present the characterization of the light absorption properties of single silicon NWs (NW) using photocurrent spectroscopy along with the preliminary work done at the wire scale to characterize the dopant incorporation and the fabrication of junctions. First, we start with a description of the growth methods used to synthesize active NW's for photocurrent generation, with results obtained on the use of hydrogen chloride in the CVD VLS growth of doped NWs. This method offers highly straight structures, widened process temperatures allowing in particular very efficient boron incorporation—ionized acceptors densities up to 1.8E19 cm-3—and inhibited gold…
Advisors/Committee Members: Magnéa, Noël (thesis director).
Subjects/Keywords: Nanofils; Photocourant; Théorie de Mie; Silicium; Absorption; Photovoltaïque; Nanowires; Photocurrent; Mie Theory; Silicon; Absorption; Photovoltaics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Solanki, A. (2012). Propriétés électriques et optiques des nanofils uniques de silicium : Electrical and optical properties of single silicon nanowires. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2012GRENY081
Chicago Manual of Style (16th Edition):
Solanki, Amit. “Propriétés électriques et optiques des nanofils uniques de silicium : Electrical and optical properties of single silicon nanowires.” 2012. Doctoral Dissertation, Université de Grenoble. Accessed February 28, 2021.
http://www.theses.fr/2012GRENY081.
MLA Handbook (7th Edition):
Solanki, Amit. “Propriétés électriques et optiques des nanofils uniques de silicium : Electrical and optical properties of single silicon nanowires.” 2012. Web. 28 Feb 2021.
Vancouver:
Solanki A. Propriétés électriques et optiques des nanofils uniques de silicium : Electrical and optical properties of single silicon nanowires. [Internet] [Doctoral dissertation]. Université de Grenoble; 2012. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2012GRENY081.
Council of Science Editors:
Solanki A. Propriétés électriques et optiques des nanofils uniques de silicium : Electrical and optical properties of single silicon nanowires. [Doctoral Dissertation]. Université de Grenoble; 2012. Available from: http://www.theses.fr/2012GRENY081

Université Laval
11.
Naci, Dalila.
Implication de l'intégrine alpha2beta1 liant le collagène
dans la survie et la chimiorésistance des leucémies
aiguës.
Degree: 2014, Université Laval
URL: http://hdl.handle.net/20.500.11794/25458
► Le rôle de la matrice extracellulaire (MEC) du microenvironnement médullaire dans la chimiorésistance des leucémies lymphoblastiques aiguës de type T (T-ALL) n’est pas encore établi.…
(more)
▼ Le rôle de la matrice extracellulaire (MEC) du
microenvironnement médullaire dans la chimiorésistance des
leucémies lymphoblastiques aiguës de type T (T-ALL) n’est pas
encore établi. Nos travaux ont permis de démontrer que le
collagène, mais pas la fibronectine, induit la résistance des
cellules T-ALL contre l’apoptose induite par la chimiothérapie.
L’effet anti-apoptotique du collagène est induit par l’intégrine
α2β1. L’activation par le collagène de la voie MAPK/ERK mais pas
PI3K/AKT est requise pour l’inhibition de l’apoptose mitochondriale
induite par la doxorubicine et ceci grâce au maintien de la
stabilité de la protéine anti-apoptotique Mcl-1 et à l’augmentation
de l’expression du transporteur d’efflux des drogues ABCC1 (MRP-1).
Le maintien de Mcl-1 par le collagène est dû à l’inhibition de la
voie pro-apoptotique Rac1/ JNK induite par la doxorubicine.
L’activation de la voie α2β1/ERK/Mcl-1 permet également la survie
des cellules T-ALL en absence de facteurs de croissance. En
conclusion, nos données suggèrent que l’intégrine α2β1 serait une
voie importante dans l’induction de la chimiorésistance et la
progression des leucémies T-ALL.
The role of the extracellular matrix (ECM) of the
tumor microenvironment in the chemoresistance of T cell acute
lymphoblastic leukemia (T-ALL) is not yet established. Through our
results, we demonstrate that collagen, but not fibronectin, induces
the resistance of T-ALL cells against apoptosis induced by
chemotherapy. The anti-apoptotic effect of collagen is mediated by
α2β1 integrin and is dependent on the activation of the MAPK/ERK
pro-survival pathway but not of the PI3K/AKT pathway. Collagen
induced MAPK/ERK pathway is required for the inhibition of the
mitochondrial apoptosis induced by doxorubicin through the
maintenance of the stability of the anti-apoptotic protein Mcl-1
and the up-regulation of doxorubicin efflux by the drug transporter
ABCC1. Mcl-1 stabilization by collagen is du to the inhibition of
Rac1/JNK pro-apoptotic pathway induced by doxorubicin. In addition
to its role in chemoresistance, α2β1 integrin ligation allows the
survival of T-ALL cells in the absence of growth factors via
ERK/Mcl-1 pathway. In conclusion, our data indicate that α2β1
integrin may constitute an important pathway favoring T-ALL
leukemia chemoresistance and progression.
Advisors/Committee Members: Aoudjit, Fawzi.
Subjects/Keywords: Intégrines; Collagène; Cellules cancéreuses – Résistance aux
médicaments; Leucémie aiguë lymphoblastique
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Naci, D. (2014). Implication de l'intégrine alpha2beta1 liant le collagène
dans la survie et la chimiorésistance des leucémies
aiguës. (Thesis). Université Laval. Retrieved from http://hdl.handle.net/20.500.11794/25458
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Naci, Dalila. “Implication de l'intégrine alpha2beta1 liant le collagène
dans la survie et la chimiorésistance des leucémies
aiguës.” 2014. Thesis, Université Laval. Accessed February 28, 2021.
http://hdl.handle.net/20.500.11794/25458.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Naci, Dalila. “Implication de l'intégrine alpha2beta1 liant le collagène
dans la survie et la chimiorésistance des leucémies
aiguës.” 2014. Web. 28 Feb 2021.
Vancouver:
Naci D. Implication de l'intégrine alpha2beta1 liant le collagène
dans la survie et la chimiorésistance des leucémies
aiguës. [Internet] [Thesis]. Université Laval; 2014. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/20.500.11794/25458.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Naci D. Implication de l'intégrine alpha2beta1 liant le collagène
dans la survie et la chimiorésistance des leucémies
aiguës. [Thesis]. Université Laval; 2014. Available from: http://hdl.handle.net/20.500.11794/25458
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
12.
Vraie, Benoît.
Management sous stress : prise en compte du facteur "stress aigu" dans la gestion de crise : les impacts du stress aigu sur les capacités du décideur en situation de crise : Management under stress : integration of acute stress in crisis management : the acute stress's impacts on managers capabilities in crisis situation.
Degree: Docteur es, Sciences de gestion, 2017, Paris 1
URL: http://www.theses.fr/2017PA01E002
► L'intégration du facteur "stress aigu" dans les problématiques de Management des Hommes équivaut à revisiter les apports et théories des Sciences de Gestion, à réinterroger…
(more)
▼ L'intégration du facteur "stress aigu" dans les problématiques de Management des Hommes équivaut à revisiter les apports et théories des Sciences de Gestion, à réinterroger et à apporter un éclairage nouveau sur des concepts fondamentaux du Management. Ainsi, il apparait que la performance et la capacité de restitution des compétences acquises par les individus dépendent directement de leur niveau de stress. En effet, en fonction du déséquilibre entre la perception qu'une personne a des contraintes que lui impose son environnement et la perception qu'elle a de ses propres ressources pour y faire face, il est possible que la dose de stress générée permette une optimisation de son comportement ou a contrario inhibe ses capacités. A ce titre, les managers doivent se préparer à savoir gérer la crise non seulement aux niveaux techniques et organisationnels mais également en prenant en compte les dimensions comportementales et psychologiques, dont le facteur "stress aigu". Ils doivent également avoir présent à l'esprit que la crise peut impacter leur propre psychologie mais également celles de leurs collaborateurs. Pour l'ensemble de ces raisons, le "stress aigu" est un des éléments fondamentaux à prendre en compte pour les auteurs qui s'intéressent aux problématiques de gestion de crise, de résilience et de fiabilité organisationnelle.
The integration of the "acute stress" factor in the problems of Human Management entails revisiting contributions and theories of Management Sciences, reexamining and shedding new light on fundamental concepts of Management. Thus, it appears that the performance and the capacity of restitution of skills acquired by individuals, depends directly on their level of stress. In fact, depending on the imbalance between the perception that a person has of the constraints imposed by his environment and the perception that he bas of his own resources in order to face them, it is possible that the level of stress generated allows an optimization of his behavior or in contrast, inhibits his abilities. Therefore, managers must be prepared to manage the crisis not only at technical and organizational levels, but also by taking into account the behavioral and psychological dimensions, including the "acute stress" factor. They must also bear in mind that the crisis can affect their own behavior as well as their colleague's behavior. For all these reasons, "acute stress" is one of the fundamental elements to be taken into account for authors who are interested in issues of crisis management, resilience and organizational reliability.
Advisors/Committee Members: Gaultier-Gaillard, Sophie (thesis director).
Subjects/Keywords: Stress aigu; Gestion de crises; Coping; Management; Apprentissage organisationnel; Acute stress; Crisis management; 650
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vraie, B. (2017). Management sous stress : prise en compte du facteur "stress aigu" dans la gestion de crise : les impacts du stress aigu sur les capacités du décideur en situation de crise : Management under stress : integration of acute stress in crisis management : the acute stress's impacts on managers capabilities in crisis situation. (Doctoral Dissertation). Paris 1. Retrieved from http://www.theses.fr/2017PA01E002
Chicago Manual of Style (16th Edition):
Vraie, Benoît. “Management sous stress : prise en compte du facteur "stress aigu" dans la gestion de crise : les impacts du stress aigu sur les capacités du décideur en situation de crise : Management under stress : integration of acute stress in crisis management : the acute stress's impacts on managers capabilities in crisis situation.” 2017. Doctoral Dissertation, Paris 1. Accessed February 28, 2021.
http://www.theses.fr/2017PA01E002.
MLA Handbook (7th Edition):
Vraie, Benoît. “Management sous stress : prise en compte du facteur "stress aigu" dans la gestion de crise : les impacts du stress aigu sur les capacités du décideur en situation de crise : Management under stress : integration of acute stress in crisis management : the acute stress's impacts on managers capabilities in crisis situation.” 2017. Web. 28 Feb 2021.
Vancouver:
Vraie B. Management sous stress : prise en compte du facteur "stress aigu" dans la gestion de crise : les impacts du stress aigu sur les capacités du décideur en situation de crise : Management under stress : integration of acute stress in crisis management : the acute stress's impacts on managers capabilities in crisis situation. [Internet] [Doctoral dissertation]. Paris 1; 2017. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2017PA01E002.
Council of Science Editors:
Vraie B. Management sous stress : prise en compte du facteur "stress aigu" dans la gestion de crise : les impacts du stress aigu sur les capacités du décideur en situation de crise : Management under stress : integration of acute stress in crisis management : the acute stress's impacts on managers capabilities in crisis situation. [Doctoral Dissertation]. Paris 1; 2017. Available from: http://www.theses.fr/2017PA01E002
13.
Al Asmar, Ghada.
Cohérence et intérêt de l'antibiothérapie prescrite par les praticiens dentistes du Liban dans le cas d'un abcès dentaire : Coherence and interest of antibiotherapy prescribed by Lebanese dentists in case of acute or chronic abscess.
Degree: Docteur es, Economie de la santé, 2016, Université Lille II – Droit et Santé
URL: http://www.theses.fr/2016LIL2S026
► D'après la littérature, la prescription empirique des antibiotiques en soins dentaires est quasi-systématique bien que leur indication soit restreinte à des diagnostics spécifiques de certaines…
(more)
▼ D'après la littérature, la prescription empirique des antibiotiques en soins dentaires est quasi-systématique bien que leur indication soit restreinte à des diagnostics spécifiques de certaines infections. En effet, le traitement d'une infection dentaire sans expression systémique, ni signe de gravité nécessite rarement la mise en place d'une antibiothérapie. Ainsi, son instauration doit être réfléchie et envisagée seulement en tenant compte du rapport bénéfice/risque apporté au patient. Car, au-delà du risque d’un mésusage relatif à un mauvais choix de la molécule ou à une inadéquation de dose, il est aussi important de considérer avec force le risque d'émergence de souches résistantes souvent à l'origine de complications majeures et parfois fatales. Très souvent les soins dentaires sont prodigués sans véritable considération de l'état général du patient et l’attitude des praticiens dentistes est assez volontariste quant à l’antibiothérapie.Ainsi, le but de cette étude est d'optimiser la pertinence des attitudes thérapeutiques des praticiens dentistes face un abcès dentaire aigu ou chronique.Prospective et multicentrique, l'étude s'est déroulée à la clinique dentaire de l'université libanaise ainsi qu’auprès de 24 cabinets dentaires situés à la ville de Beyrouth.Les résultats obtenus montrent que 48,2% des praticiens dentistes avaient une attitude inadéquate en termes de prescription d’antibiotiques. L’intérêt de notre étude est de favoriser la mise en place d’une nouvelle approche d’antibiothérapie moins basée sur l'empirisme.
Although, antibiotics prescription is restricted to specific diagnosis of some infections, in dental care; it is empirical and almost systematic. Indeed, the treatment of a dental infection without a systemic expression or severity signs rarely requires an antibiotic prescription. Furthermore, this latter must only be well thought-out and planned taking into account the benefit / risk for the patient. For, beyond the risk of misuse of antibiotherapy relative to the bad choice of molecules or inadequation in dosage, it is important to consider with strength the risk of resistant strains emergence manifestation often at the origin of major complications and sometimes fatal. Hence, very often dental care is provided without real consideration of the patient's general state. Thus, the aim of this study is to optimize the relevance of therapeutic attitudes dentists regarding acute or chronic abscess.Prospective and multicenter, the study took place at the dental clinic of the Lebanese University and in 24 private dental clinics.The results showed that 48.2% of the dentist’s practitioners had an inadequate therapeutic attitude concerning antibiotherapy prescriptions.These works could help set up a new therapeutic approach less based on empiricism.
Advisors/Committee Members: Cochelard, Dominique (thesis director).
Subjects/Keywords: Antibiotiques; Prescriptions; Abcès aigu; Soins dentaires; Antibiotics prescriptions; Dental care; Acute abscess
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Al Asmar, G. (2016). Cohérence et intérêt de l'antibiothérapie prescrite par les praticiens dentistes du Liban dans le cas d'un abcès dentaire : Coherence and interest of antibiotherapy prescribed by Lebanese dentists in case of acute or chronic abscess. (Doctoral Dissertation). Université Lille II – Droit et Santé. Retrieved from http://www.theses.fr/2016LIL2S026
Chicago Manual of Style (16th Edition):
Al Asmar, Ghada. “Cohérence et intérêt de l'antibiothérapie prescrite par les praticiens dentistes du Liban dans le cas d'un abcès dentaire : Coherence and interest of antibiotherapy prescribed by Lebanese dentists in case of acute or chronic abscess.” 2016. Doctoral Dissertation, Université Lille II – Droit et Santé. Accessed February 28, 2021.
http://www.theses.fr/2016LIL2S026.
MLA Handbook (7th Edition):
Al Asmar, Ghada. “Cohérence et intérêt de l'antibiothérapie prescrite par les praticiens dentistes du Liban dans le cas d'un abcès dentaire : Coherence and interest of antibiotherapy prescribed by Lebanese dentists in case of acute or chronic abscess.” 2016. Web. 28 Feb 2021.
Vancouver:
Al Asmar G. Cohérence et intérêt de l'antibiothérapie prescrite par les praticiens dentistes du Liban dans le cas d'un abcès dentaire : Coherence and interest of antibiotherapy prescribed by Lebanese dentists in case of acute or chronic abscess. [Internet] [Doctoral dissertation]. Université Lille II – Droit et Santé 2016. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2016LIL2S026.
Council of Science Editors:
Al Asmar G. Cohérence et intérêt de l'antibiothérapie prescrite par les praticiens dentistes du Liban dans le cas d'un abcès dentaire : Coherence and interest of antibiotherapy prescribed by Lebanese dentists in case of acute or chronic abscess. [Doctoral Dissertation]. Université Lille II – Droit et Santé 2016. Available from: http://www.theses.fr/2016LIL2S026
14.
Freund, Yonathan.
Approche multimarqueurs en médecine d'urgence : Multimarkers approach in emergency medicine.
Degree: Docteur es, Physiologie, physiopathologie et thérapeutique, 2015, Université Pierre et Marie Curie – Paris VI
URL: http://www.theses.fr/2015PA066123
► L'apport des biomarqueurs aux urgences est bien documenté. Depuis l'apparition de la myoglobine et de la troponine pour le diagnostic de syndrome coronaire aigu (SCA),…
(more)
▼ L'apport des biomarqueurs aux urgences est bien documenté. Depuis l'apparition de la myoglobine et de la troponine pour le diagnostic de syndrome coronaire aigu (SCA), de multiples marqueurs ont été développés pour l'aide au diagnostic de multiples pathologies aux urgences. Certains biomarqueurs sont même intégrés à la définition de syndromes ou pathologies comme le SCA avec la troponine, ou le sepsis sévère avec le lactate. Nous abordons dans ce travail l'approche multimarqueurs, qui consiste à combiner le dosage de plusieurs biomarqueurs pour améliorer les performances diagnostiques ou pronostiques. L'hypothèse de base de ce travail est que l'association d'un marqueur sensible, généraliste, avec un marqueur spécifique de pathologie ou de dysfonction d'organe, permettrait d'améliorer la prise en charge diagnostique ou la stratification du risque aux urgences. On illustre cette approche dans trois cas particuliers : la prédiction du sepsis sévère, le diagnostic du syndrome coronaire aigu, et l'évaluation du risque après une crise convulsive. Plusieurs méthodes sont envisagées pour combiner plusieurs biomarqueurs, et on développera ici la détermination de la meilleure combinaison linéaire pour obtenir une discrimination optimale.
The added value of biomarkers in the emergency settings is well reported, in various pathologies. Since the burst of myoglobin and troponine for the diagnosis of myocardial infarction (MI), various biomarkers have been developed and adopted for diagnostic purposes in different pathologies. Some of them are part of the very definition of specific syndrom or disease (MI with troponin, or severe sepsis with lactate). We present here the multimarker approach in the emergency department – a strategy that combines the results of several different biomarkers to enhance diagnostic or prognostic performances. We made the hypothesis that the association of a sensitive and generalist biomarker, with an organ or syndrome specific one, would result in better performances.We illustrate here this strategy in three particular cases: the prediction of severe sepsis, the diagnosis of acute coronary syndrome, and the risk stratification after a convulsive seizure. Several methods are considered for the combination of biomarkers, and we will focus on the determination of the best linear combination.
Advisors/Committee Members: Hausfater, Pierre (thesis director), Riou, Bruno (thesis director).
Subjects/Keywords: Biomarqueurs; Médecine d'urgence; Courbe ROC; Sepsis; Syndrome coronaire aigu; Convulsions; Biomarkers; Acute coronary syndrome; 612.8
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Freund, Y. (2015). Approche multimarqueurs en médecine d'urgence : Multimarkers approach in emergency medicine. (Doctoral Dissertation). Université Pierre et Marie Curie – Paris VI. Retrieved from http://www.theses.fr/2015PA066123
Chicago Manual of Style (16th Edition):
Freund, Yonathan. “Approche multimarqueurs en médecine d'urgence : Multimarkers approach in emergency medicine.” 2015. Doctoral Dissertation, Université Pierre et Marie Curie – Paris VI. Accessed February 28, 2021.
http://www.theses.fr/2015PA066123.
MLA Handbook (7th Edition):
Freund, Yonathan. “Approche multimarqueurs en médecine d'urgence : Multimarkers approach in emergency medicine.” 2015. Web. 28 Feb 2021.
Vancouver:
Freund Y. Approche multimarqueurs en médecine d'urgence : Multimarkers approach in emergency medicine. [Internet] [Doctoral dissertation]. Université Pierre et Marie Curie – Paris VI; 2015. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2015PA066123.
Council of Science Editors:
Freund Y. Approche multimarqueurs en médecine d'urgence : Multimarkers approach in emergency medicine. [Doctoral Dissertation]. Université Pierre et Marie Curie – Paris VI; 2015. Available from: http://www.theses.fr/2015PA066123

Université Laval
15.
Aspirot-Buron, Virginie.
Évaluation des capacités cardiorespiratoires et physiques
d'enfants en traitement de chimiothérapie pour une leucémie
lymphoblastique aiguë.
Degree: 2019, Université Laval
URL: http://hdl.handle.net/20.500.11794/37636
► La leucémie est un cancer qui touche les cellules souches du sang. Il existe plusieurs types de leucémies, toutefois nous nous sommes intéressés à la…
(more)
▼ La leucémie est un cancer qui touche les cellules
souches du sang. Il existe plusieurs types de leucémies, toutefois
nous nous sommes intéressés à la leucémie lymphoblastique aiguë
(LLA) pédiatrique. L’anomalie se trouve au niveau des cellules
souches lymphoïdes, et se développe de manière soudaine, en
quelques jours ou quelques semaines. De nombreuses conséquences
néfastes sont connues au niveau cardiorespiratoire, musculaire, de
l'énergie et de l’activité physique d’enfants en fin de
chimiothérapie. L’objectif premier de l’étude était de mesurer les
capacités cardiorespiratoires et musculaires réelles d’enfants
atteints d’une LLA à trois temps de la chimiothérapie : l’induction
(T1), la consolidation 2 (T2) et l’entretien (T3). Un deuxième
objectif était de tester la faisabilité d’une épreuve d’effort
maximal cardiorespiratoire pendant ou après l’induction. Le
protocole de l’étude comprenait une épreuve d’effort physique sur
ergocycle pour évaluer la consommation maximale d’oxygène (V ̇
O2max) un questionnaire sur la qualité de vie et un sur l’activité
physique. La force musculaire était évaluée par un audit des
dossiers (N=16) de physiothérapie d’anciens patients et des
participants à l’étude. Une patiente a complété le test V ̇ O2max
aux T1 et T2, et s’est améliorée de 54,5% entre les deux tests,
mais restait nettement sous les valeurs normales. Pour l’ensemble
des données de force musculaire : force de préhension, moment de
force des extenseurs du genou et des fléchisseurs dorsaux de la
cheville, les valeurs étaient inférieures à celles d’enfants sains,
et avaient diminuées entre l’induction et la consolidation 2. Les
résultats de ce mémoire démontrent que certains enfants atteints
d’une LLA présentent un déconditionnement cardiorespiratoire et
musculaire dès l’induction. Elles démontrent également la
faisabilité d’un exercice cardiorespiratoire soutenu après la phase
d’induction. Ces données importantes serviront aux professionnels
de la santé dans la mise en place d’interventions en activité
physique adaptée aux capacités d’enfants atteints d’une
LLA.
Leukemia is a blood cancer and can be expressed in
many forms, but the main focus of this thesis will be on acute
lymphoblastic leukemia (ALL) in the pediatric population. The
anomaly develops in the lymphoid stem cells and the disease
develops rapidly, within a few days to a few weeks. Leukemia and
chemotherapy have been shown to have many deleterious on the
children cardiorespiratory and muscular status, energy level and
engagement in physical activity mainly reported for children in the
last phase of chemotherapy. The first aim of our work was to
collect data on their cardiorespiratory and muscular status during
three phases of the chemotherapy: induction (T1), consolidation 2
(T2) and maintenance (T3). The second aim was to test the
feasibility of maximal oxygen consumption test ((V ̇ O2max) during
or post induction. The protocol comprised a (V ̇ O2max) test on
ergocycle, a quality of life and physical activity questionnaires.
Data on muscular strength was…
Advisors/Committee Members: Batcho, Sèbiyo Charles, Corbeil, Philippe.
Subjects/Keywords: Enfants leucémiques; Appareil cardiopulmonaire; Respiration – Mesure; Condition physique – Mesure; Leucémie aiguë lymphoblastique –
Chimiothérapie
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Aspirot-Buron, V. (2019). Évaluation des capacités cardiorespiratoires et physiques
d'enfants en traitement de chimiothérapie pour une leucémie
lymphoblastique aiguë. (Thesis). Université Laval. Retrieved from http://hdl.handle.net/20.500.11794/37636
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Aspirot-Buron, Virginie. “Évaluation des capacités cardiorespiratoires et physiques
d'enfants en traitement de chimiothérapie pour une leucémie
lymphoblastique aiguë.” 2019. Thesis, Université Laval. Accessed February 28, 2021.
http://hdl.handle.net/20.500.11794/37636.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Aspirot-Buron, Virginie. “Évaluation des capacités cardiorespiratoires et physiques
d'enfants en traitement de chimiothérapie pour une leucémie
lymphoblastique aiguë.” 2019. Web. 28 Feb 2021.
Vancouver:
Aspirot-Buron V. Évaluation des capacités cardiorespiratoires et physiques
d'enfants en traitement de chimiothérapie pour une leucémie
lymphoblastique aiguë. [Internet] [Thesis]. Université Laval; 2019. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/20.500.11794/37636.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Aspirot-Buron V. Évaluation des capacités cardiorespiratoires et physiques
d'enfants en traitement de chimiothérapie pour une leucémie
lymphoblastique aiguë. [Thesis]. Université Laval; 2019. Available from: http://hdl.handle.net/20.500.11794/37636
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Bonifácio, Leonardo da Silva.
Processos de agregação e fusão de nanopartículas de ouro: Uma abordagem química.
Degree: Mestrado, Química Inorgânica, 2006, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/46/46134/tde-16092006-145739/
;
► Sob o olhar nanotecnológico, a dimensionalidade passa a ser um fator preponderante nas propriedades dos materiais. O ouro metálico com dimensões reduzidas para a escala…
(more)
▼ Sob o olhar nanotecnológico, a dimensionalidade passa a ser um fator preponderante nas propriedades dos materiais. O ouro metálico com dimensões reduzidas para a escala nanométrica passa a exibir um comportamento peculiar em termos de sua estrutura eletrônica e reatividade. No trabalho realizado busca-se um melhor entendimento das propriedades das nanopartículas de ouro através de um abordagem química, com foco nas interações superficiais e suas correlações com fenômenos de agregação. No campo mais fundamental, foram realizados estudos visando entender a influência de ligantes de diferentes comprimentos de cadeia nos processos de agregação e de fusão de nanopartículas, utilizando-se para tal ligantes de interesse para a química supramolecular: pirazina, 4,4\'-bipiridina, 1,2-bis (4-piridil)etano e 1,4-bis[(4-piridil)etenil]benzeno. Além disso, foram realizados estudos que permitiram a obtenção de nanopartículas de ouro passivadas com o complexo [Fe(CN)5(4-pySH)]3-,gerando um bloco de contrução interessante para a geração de materiais nanoestruturados a partir de ligações do tipo azul da Prússia. Por fim, estudos da interação de nanopartículas de ouro como o suporte inorgânico hidrotalcita foram realizados, possibilitando a geração de um material colorido composto de nanopartículas de ouro suportadas na superfície da matriz inorgânica. O material exibe ainda efeitos de mudança de coloração com o aumento da temperatura, correlacionados com o estado de agregação das nanopartículas metálicas.
Under the nanotechnological point of view, the dimensionality comes into play when one is dealing with many properties from the materials. Bulk gold with dimensions reduced to the nanometric scale shows singular reactivity and electronic properties. In the present work a further knowledge of the gold nanoparticles properties is sought from a chemical approach, through the investigation of surface interactions and their correlations with aggregation phenomena. Studies aiming a further understanding on the influence of different length ligands in the aggregation and fusional processes were performed with the ligands: pyrazine, 4,4\'-bipyridine, 1,2-bis(4-pyridyl)ethane and 1,4-bis[(4- pyridyl)ethenyl]benzene. Furthermore, the investigation of nanoparticles surface interaction with the ligands 2 and 4-mercaptopyridine and their complexes with pentacianoferrate was also investigated allowing the obtainment of building block potentially useful for the generation of nanostructured materials through Prussian blue-like bonds. Finally, the obtainment of a new material based on surface interactions of gold nanoparticles on the inorganic support hydrotalcite was possible. The material exhibits peculiar thermochromic properties with colors dependent on the aggregation state of the nanoparticles.
Advisors/Committee Members: Toma, Henrique Eisi.
Subjects/Keywords: Nanoparticles; Nanopartículas; Teoria de Mie; Theory of Mie
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bonifácio, L. d. S. (2006). Processos de agregação e fusão de nanopartículas de ouro: Uma abordagem química. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/46/46134/tde-16092006-145739/ ;
Chicago Manual of Style (16th Edition):
Bonifácio, Leonardo da Silva. “Processos de agregação e fusão de nanopartículas de ouro: Uma abordagem química.” 2006. Masters Thesis, University of São Paulo. Accessed February 28, 2021.
http://www.teses.usp.br/teses/disponiveis/46/46134/tde-16092006-145739/ ;.
MLA Handbook (7th Edition):
Bonifácio, Leonardo da Silva. “Processos de agregação e fusão de nanopartículas de ouro: Uma abordagem química.” 2006. Web. 28 Feb 2021.
Vancouver:
Bonifácio LdS. Processos de agregação e fusão de nanopartículas de ouro: Uma abordagem química. [Internet] [Masters thesis]. University of São Paulo; 2006. [cited 2021 Feb 28].
Available from: http://www.teses.usp.br/teses/disponiveis/46/46134/tde-16092006-145739/ ;.
Council of Science Editors:
Bonifácio LdS. Processos de agregação e fusão de nanopartículas de ouro: Uma abordagem química. [Masters Thesis]. University of São Paulo; 2006. Available from: http://www.teses.usp.br/teses/disponiveis/46/46134/tde-16092006-145739/ ;
17.
Alhaits, Jee Hyun.
Chŏng Yagyong 丁若鏞 (1762-1836) et sa critique du Shangshu 尚書 en guwen 古文 : Chŏng Yagyong 丁若鏞 (1762-1836) and his criticism of Shangshu 尚書 in guwen 古文.
Degree: Docteur es, Langues, littératures et sociétés, 2013, Paris, INALCO
URL: http://www.theses.fr/2013INAL0010
► La présente étude a pour objectif de comprendre la critique que formule Chŏng Yagyong丁若鏞 (1762-1836) du Shangshu (Livre des Documents) en guwen (graphie ancienne). Lettré-fonctionnaire…
(more)
▼ La présente étude a pour objectif de comprendre la critique que formule Chŏng Yagyong丁若鏞 (1762-1836) du Shangshu (Livre des Documents) en guwen (graphie ancienne). Lettré-fonctionnaire à la Cour de Chŏngjo (r. 1776-1800), Chŏng Yagyong appartient à l’époque Chosŏn (1392-1897) en Corée, à une ère charnière de l’histoire coréenne qui oscille entre tradition et modernité, entre le néoconfucianisme et la découverte de certains savoirs scientifiques et religieux venus d’Occident. Notre étude vise trois objectifs. Le premier est de découvrir l’immense érudition de l’auteur, dont le penchant encyclopédique caractérise toute l’œuvre, et sa méthode d’investigation très personnelle. Le deuxième est de discerner, dans ses écrits, les influences chinoises et occidentales et les fruits de sa propre réflexion. Le troisième est de percevoir le message politique à travers les lignes de son commentaire qui révèle une partie des motivations de l’auteur. Cette étude se divise en quatre chapitres. Le premier, qui a valeur de chapitre introductif, présente et définit l’étendue de notre sujet ; le deuxième offre une analyse contextuelle du Shangshu en guwen ; le troisième procède à une analyse surtout textuelle du commentaire de Tasan sur ce Classique ; le quatrième porte sur le double examen par Zhu Xi et Tasan des seize caractères des « Conseils de Yu le Grand ».
The objective of this study is to achieve an understanding of the criticism made by Chŏng Yagyong丁若鏞 (1762-1836) of the guwen (old-script) version of the Shangshu (Book of Documents). A scholar-official at the court of Chŏngjo (r. 1776-1800), Chŏng Yagyong lived during the Joseon Dynasty (1392-1897), at a turning point in Korean history, caught between tradition and modernity, Neo-Confucianism and the discovery of scientific and religious knowledge from the West. The study has three objectives. Firstly, to discover the vast erudition of an author whose entire work was characterised by an encyclopaedic tendency, along with his very personal research methods. Secondly, to discern in his writings Chinese and Western influences and the fruits of his own reflection. Thirdly, to perceive, between the lines of his commentary, a political message revealing part of the author’s motivations. The study is divided into four chapters. The first, an introductory chapter, presents and defines the scope of the subject; the second offers a contextual analysis of the guwen version of the Shangshu; the third presents a mostly textual analysis of Tasan’s commentary of this Classic; the fourth concerns Zhu Xi and Tasan’s twofold examination of the sixteen characters of the “Counsels of Yu the Great”.
Advisors/Committee Members: Cheng, Anne (thesis director).
Subjects/Keywords: Mao Qiling; Mie Ze; Corée de l’époque Chosŏn (1392-1896); Mao Qiling; Mie Ze; Chosŏn dynasty (1392-1896)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Alhaits, J. H. (2013). Chŏng Yagyong 丁若鏞 (1762-1836) et sa critique du Shangshu 尚書 en guwen 古文 : Chŏng Yagyong 丁若鏞 (1762-1836) and his criticism of Shangshu 尚書 in guwen 古文. (Doctoral Dissertation). Paris, INALCO. Retrieved from http://www.theses.fr/2013INAL0010
Chicago Manual of Style (16th Edition):
Alhaits, Jee Hyun. “Chŏng Yagyong 丁若鏞 (1762-1836) et sa critique du Shangshu 尚書 en guwen 古文 : Chŏng Yagyong 丁若鏞 (1762-1836) and his criticism of Shangshu 尚書 in guwen 古文.” 2013. Doctoral Dissertation, Paris, INALCO. Accessed February 28, 2021.
http://www.theses.fr/2013INAL0010.
MLA Handbook (7th Edition):
Alhaits, Jee Hyun. “Chŏng Yagyong 丁若鏞 (1762-1836) et sa critique du Shangshu 尚書 en guwen 古文 : Chŏng Yagyong 丁若鏞 (1762-1836) and his criticism of Shangshu 尚書 in guwen 古文.” 2013. Web. 28 Feb 2021.
Vancouver:
Alhaits JH. Chŏng Yagyong 丁若鏞 (1762-1836) et sa critique du Shangshu 尚書 en guwen 古文 : Chŏng Yagyong 丁若鏞 (1762-1836) and his criticism of Shangshu 尚書 in guwen 古文. [Internet] [Doctoral dissertation]. Paris, INALCO; 2013. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2013INAL0010.
Council of Science Editors:
Alhaits JH. Chŏng Yagyong 丁若鏞 (1762-1836) et sa critique du Shangshu 尚書 en guwen 古文 : Chŏng Yagyong 丁若鏞 (1762-1836) and his criticism of Shangshu 尚書 in guwen 古文. [Doctoral Dissertation]. Paris, INALCO; 2013. Available from: http://www.theses.fr/2013INAL0010
18.
Catalano, Christophe.
Couplage entre les lasers solides émettant dans le bleu et les luminophores jaunes pour l'obtention de la lumière blanche pour l'éclairage : Creation of white light by coupling a laser diode and a suitable phosphor.
Degree: Docteur es, Ingénierie des Plasmas, 2020, Université Toulouse III – Paul Sabatier
URL: http://www.theses.fr/2020TOU30007
► Actuellement les LEDs représentent une part de plus en plus importante de l'éclairage mondial. Cependant des recherches récentes ont permis de développer une solution encore…
(more)
▼ Actuellement les LEDs représentent une part de plus en plus importante de l'éclairage mondial. Cependant des recherches récentes ont permis de développer une solution encore plus économe en énergie que les LEDs en couplant optiquement des diodes laser à un luminophore. Les diodes laser fonctionnent sur un principe similaire aux LEDs mais permettent d'obtenir une puissance lumineuse plus élevée. A puissance égale, ceci permet d'utiliser moins de diodes laser et donc de grandement réduire la problématique due au réseau de sources lumineuses. Ces diodes laser sont aussi moins sujettes à l'emballement thermique que les LEDs. Cette solution comporte malgré tout quelques défauts : une diode laser demande une dissipation thermique accrue et produit un niveau de lumière bleue plus important en sortie qu'une LED. Le but de ce manuscrit est d'étudier la caractérisation et la modélisation d'un couplage diode laser/luminophore afin de pouvoir définir les axes d'amélioration de cette technologie ainsi que réaliser un modèle expérimental.
Currently, Light Emitting Diodes or LEDs are an increasingly important part of global lighting. However, recent research has made possible to develop an even more energy efficient solution than LEDs by optically coupling laser diodes to a remote phosphor. Laser diodes operate on a principle similar to LEDs but allow to obtain a higher luminous power. In fact for an equivalent luminous power, this allows to use less laser diodes and thus greatly reduce problems caused by using a network of light sources. Laser diodes are also less prone to thermal runaway than LEDs. However, this solution isn't perfect: a laser diode requires more heat dissipation and produces a higher level of blue light output than an LED. The aim of this manuscript is to study the characterization and the modeling of a diode laser / phosphor coupling in order to be able to define the axes of improvement of this technology as well as to realize an experimental model.
Advisors/Committee Members: Zissis, Georges (thesis director), Ledru, Gérald (thesis director).
Subjects/Keywords: Diode laser; Luminophore; Chromaticité; Diffusion de Mie; LightTools; Efficacité quantique; Laser diode; Phosphor; Chromaticity; Mie scattering; LightTools; Quantic efficiency
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Catalano, C. (2020). Couplage entre les lasers solides émettant dans le bleu et les luminophores jaunes pour l'obtention de la lumière blanche pour l'éclairage : Creation of white light by coupling a laser diode and a suitable phosphor. (Doctoral Dissertation). Université Toulouse III – Paul Sabatier. Retrieved from http://www.theses.fr/2020TOU30007
Chicago Manual of Style (16th Edition):
Catalano, Christophe. “Couplage entre les lasers solides émettant dans le bleu et les luminophores jaunes pour l'obtention de la lumière blanche pour l'éclairage : Creation of white light by coupling a laser diode and a suitable phosphor.” 2020. Doctoral Dissertation, Université Toulouse III – Paul Sabatier. Accessed February 28, 2021.
http://www.theses.fr/2020TOU30007.
MLA Handbook (7th Edition):
Catalano, Christophe. “Couplage entre les lasers solides émettant dans le bleu et les luminophores jaunes pour l'obtention de la lumière blanche pour l'éclairage : Creation of white light by coupling a laser diode and a suitable phosphor.” 2020. Web. 28 Feb 2021.
Vancouver:
Catalano C. Couplage entre les lasers solides émettant dans le bleu et les luminophores jaunes pour l'obtention de la lumière blanche pour l'éclairage : Creation of white light by coupling a laser diode and a suitable phosphor. [Internet] [Doctoral dissertation]. Université Toulouse III – Paul Sabatier; 2020. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2020TOU30007.
Council of Science Editors:
Catalano C. Couplage entre les lasers solides émettant dans le bleu et les luminophores jaunes pour l'obtention de la lumière blanche pour l'éclairage : Creation of white light by coupling a laser diode and a suitable phosphor. [Doctoral Dissertation]. Université Toulouse III – Paul Sabatier; 2020. Available from: http://www.theses.fr/2020TOU30007

Université de Bordeaux I
19.
Lannebere, Sylvain.
Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction.
Degree: Docteur es, Electronique, 2011, Université de Bordeaux I
URL: http://www.theses.fr/2011BOR14389
► Ce travail de thèse a été consacré à l'étude théorique et numérique de métamatériaux pour la gamme submillimétrique (domaine térahertz), formés de sphères diélectriques présentant…
(more)
▼ Ce travail de thèse a été consacré à l'étude théorique et numérique de métamatériaux pour la gamme submillimétrique (domaine térahertz), formés de sphères diélectriques présentant des résonances dipolaires de Mie électrique et magnétique, dispersées dans un milieu-hôte. Tout d'abord, les matériaux à utiliser ainsi que les tailles et fraction volumique des sphères permettant l'obtention d'effets de perméabilité ont été précisées. Ensuite, nous avons mené une étude de la polydispersité en taille, mettant en évidence qu'une polydispersité contrôlée pouvait engendrer un élargissement des zones de perméabilité négative ou une zone de perméabilité nulle. Enfin, nous avons étudié le comportement électromagnétique d'assemblages bidisperses de sphères par simulations numériques, et avons procédé à une analyse des modes de Bloch, semblant indiquer l'existence d'une bande d'indice négatif pour des fractions volumiques élevées.
This PhD work was dedicated to the theoretical and numerical study of metamaterials in the terahertz range made of dielectric spheres embedded in a host medium and exhibiting dipolar electric and magnetic Mie resonances. The materials as well as the sizes and the filling fractions of the spheres to use to achieve magnetism in this range of frequency were precised. As a second step, we interested in the size distribution effects on the effective permeability, and showed that a controlled polydispersity can generate a widening of the negative permeability zone with a magnitude close to zero. Finally, we studied the electromagnetic behaviour of bidisperse array of TiO2 spheres with numerical simulations, and a Bloch mode analysis seems to proove the existence of a negative index band for high filling fractions.
Advisors/Committee Members: Aradian, Ashod (thesis director), Vigneras, Valérie (thesis director).
Subjects/Keywords: Électromagnétisme; Métamatériaux; Diélectrique; Térahertz; Modélisation; Milieu effectif; Résonances de Mie; Electromagnetism; Metamaterials; Dielectrics; Terahertz; Modelling; Effective medium; Mie resonances
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APA ·
Chicago ·
MLA ·
Vancouver ·
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APA (6th Edition):
Lannebere, S. (2011). Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction. (Doctoral Dissertation). Université de Bordeaux I. Retrieved from http://www.theses.fr/2011BOR14389
Chicago Manual of Style (16th Edition):
Lannebere, Sylvain. “Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction.” 2011. Doctoral Dissertation, Université de Bordeaux I. Accessed February 28, 2021.
http://www.theses.fr/2011BOR14389.
MLA Handbook (7th Edition):
Lannebere, Sylvain. “Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction.” 2011. Web. 28 Feb 2021.
Vancouver:
Lannebere S. Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction. [Internet] [Doctoral dissertation]. Université de Bordeaux I; 2011. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2011BOR14389.
Council of Science Editors:
Lannebere S. Étude théorique de métamatériaux formés de particules diélectriques résonantes dans la gamme submillimétrique : magnétisme artificiel et indice de réfraction négatif : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction. [Doctoral Dissertation]. Université de Bordeaux I; 2011. Available from: http://www.theses.fr/2011BOR14389

Université de Bordeaux I
20.
Yahiaoui, Riad.
Caractérisation de métamatériaux pour applications millimétriques et submillimétriques : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction.
Degree: Docteur es, Lasers, matières et nanosciences, 2011, Université de Bordeaux I
URL: http://www.theses.fr/2011BOR14321
► Ce mémoire de thèse est consacré à l'étude, la fabrication et la caractérisation de métamatériaux en vue d'applications dans le domaine millimétrique et submillimétrique. Dans…
(more)
▼ Ce mémoire de thèse est consacré à l'étude, la fabrication et la caractérisation de métamatériaux en vue d'applications dans le domaine millimétrique et submillimétrique. Dans un premier temps, nous avons tenu à rappeler les propriétés remarquables ainsi que les processus physiques mis en jeux par cette nouvelle génération de matériaux. Le manuscrit regroupe essentiellement des résultats issus d’études réalisées sur différentes structures en microondes et en terahertz : métamatériaux composites, métamatériaux entièrement diélectriques à base de résonances de Mie, ouvertures sublongueur d’ondes basés sur la transmission extraordinaire assistée par plasmons de surface. Nos investigations ont permis d’ouvrir la voie à de multiples applications dans les domaines des capteurs et des télécommunications.
This PhD dissertation is dedicated to the study, fabrication and characterization of metamaterials for millimeter and submillimeter applications. First of all we proposed to remind the extraordinary properties and physical processes involving within this new generation of materials. The manuscript contains results obtained from studies performed on different categories of metamaterials at microwave and terahertz frequencies: composite metamaterials, all dielectric metamaterials based on Mie resonances, subwavelength apertures based on the extraordinary transmission assisted by surface Plasmon polaritons. Our investigations have contributed to open the path to multiple potential applications in the field of sensors and telecommunications.
Advisors/Committee Members: Mounaix, Patrick (thesis director), Vigneras, Valérie (thesis director).
Subjects/Keywords: Métamatériaux; Refraction négative; Spéctroscopie térahertz; Résonance de Mie; Antennes; Metamaterials; Negative refraction; Terahertz spectroscopy; Mie resonance; Antennas
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yahiaoui, R. (2011). Caractérisation de métamatériaux pour applications millimétriques et submillimétriques : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction. (Doctoral Dissertation). Université de Bordeaux I. Retrieved from http://www.theses.fr/2011BOR14321
Chicago Manual of Style (16th Edition):
Yahiaoui, Riad. “Caractérisation de métamatériaux pour applications millimétriques et submillimétriques : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction.” 2011. Doctoral Dissertation, Université de Bordeaux I. Accessed February 28, 2021.
http://www.theses.fr/2011BOR14321.
MLA Handbook (7th Edition):
Yahiaoui, Riad. “Caractérisation de métamatériaux pour applications millimétriques et submillimétriques : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction.” 2011. Web. 28 Feb 2021.
Vancouver:
Yahiaoui R. Caractérisation de métamatériaux pour applications millimétriques et submillimétriques : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction. [Internet] [Doctoral dissertation]. Université de Bordeaux I; 2011. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2011BOR14321.
Council of Science Editors:
Yahiaoui R. Caractérisation de métamatériaux pour applications millimétriques et submillimétriques : Theoretical study of metamaterials made of resonant dielectric particles in the submillimetric range : artificial magnetism and negative index of refraction. [Doctoral Dissertation]. Université de Bordeaux I; 2011. Available from: http://www.theses.fr/2011BOR14321

UCLA
21.
Akbari, Najva.
Radiofrequency Encoded Angular-Resolved Light Scattering.
Degree: Electrical Engineering, 2015, UCLA
URL: http://www.escholarship.org/uc/item/50x3v096
► Label-free classification of microstructures is a valuable approach in a variety of fields including cytometry and atmospheric science. The sensitive classification of microscopic cells and…
(more)
▼ Label-free classification of microstructures is a valuable approach in a variety of fields including cytometry and atmospheric science. The sensitive classification of microscopic cells and organisms is especially an important outstanding problem in biology. Flow cytometry is a routine method for cell classification. Current flow cytometers use light scattering at two fixed angles to infer information about size and internal complexity of cells at rates of more than 10,000 cells per second. However, this approach limits the precision and information that can be deduced by the cell population from the light scattering patterns. Capturing the full angular scattering spectrum of cells and particles would enable classification of cells with higher resolution and specificity. By capturing the angular dependence of scattering intensity we will be able to extract information about the scattering particle, hence providing a label-free method for particle classification. Current systems that provide angular scattering patterns do not have the throughput required to be implemented in state-of-the-art flow cytometers. Inverse scattering has been one of the more difficult problems to solve in electromagnetic wave interaction problems. Yet there have been many solutions obtained by analytical and computational modeling for various cases. The angular light scattering profile of particles is dependent on their morphological parameters, such as size, shape, and their internal structure. One of the most interesting applications of modeling these scattering profiles is in characterizing cells to identify abnormalities. Methods to take advantage of this angular dependent information have been demonstrated, however, these methods have various limitations such as low speed and precision. Here I present a new high throughput multi-angle resolved light scattering measurement technique that is able to capture the full angular scattering profile of particles in a single shot using a single detector. Termed Radiofrequency Encoded Angular-resolved Light Scattering (REALS), this technique uses one-to-one radiofrequency-to-angle mapping to measure angular dependence of light scattered from particles in a single shot using a photomultiplier tube. Using this technique it is possible to capture the continuous scattering profile over a wide dynamic range without mechanical scanning. This information allows us to characterize particle morphology and size with increased accuracy and high throughput, enabling label-free and high speed flow cytometry. As a proof of concept we distinguish the radius of tapered silica fiber over a range of radii.
Subjects/Keywords: Electrical engineering; Physics; Electromagnetics; Flow cytometry; Mie Scattering; Scattering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Akbari, N. (2015). Radiofrequency Encoded Angular-Resolved Light Scattering. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/50x3v096
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Akbari, Najva. “Radiofrequency Encoded Angular-Resolved Light Scattering.” 2015. Thesis, UCLA. Accessed February 28, 2021.
http://www.escholarship.org/uc/item/50x3v096.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Akbari, Najva. “Radiofrequency Encoded Angular-Resolved Light Scattering.” 2015. Web. 28 Feb 2021.
Vancouver:
Akbari N. Radiofrequency Encoded Angular-Resolved Light Scattering. [Internet] [Thesis]. UCLA; 2015. [cited 2021 Feb 28].
Available from: http://www.escholarship.org/uc/item/50x3v096.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Akbari N. Radiofrequency Encoded Angular-Resolved Light Scattering. [Thesis]. UCLA; 2015. Available from: http://www.escholarship.org/uc/item/50x3v096
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Carnegie Mellon University
22.
Saliba, Georges.
Emissions and Climate Impacts of Aerosol Emissions from Cookstoves and Gasoline Direct Injection Vehicles.
Degree: 2018, Carnegie Mellon University
URL: http://repository.cmu.edu/dissertations/1126
► Anthropogenic gas- and particle-phase emissions affect the climate by absorbing and scattering radiation, and have been linked to adverse health effects. Black carbon (BC), a…
(more)
▼ Anthropogenic gas- and particle-phase emissions affect the climate by absorbing and scattering radiation, and have been linked to adverse health effects. Black carbon (BC), a by-product of incomplete combustion, is the most potent light-absorbing component of atmospheric aerosols, with a top-of-the atmosphere direct radiative forcing estimated to be only second to CO2. However, there is a large uncertainty associated with BC’s total direct and indirect radiative forcings due to uncertain source emissions and optical properties and complex interactions with clouds. In this dissertation we investigate the direct radiative impact of two of the most important sources of BC particles: biofuel combustion and vehicles. Together these sources contribute around 40% of the global atmospheric BC burden. Recently, both of these energy sources are undergoing rapid technology changes, and the climate impacts from the emissions of these newly adopted technologies remain uncertain. We also investigate the role of atmospheric processing on the optical properties and growth rates of particles. This dissertation first assesses the climate impacts of aerosol emissions of two rapidly emerging technologies: improved cookstoves and gasoline direct injection (GDI) vehicles. We performed extensive measurements of gas- and particle emissions and optical properties of emissions from both these sources. Our data suggests that improved rocket cookstoves have, on average, a factor of two lower particulate matter (PM) emissions compared to traditional cookstoves but only a 4% climate benefits associated with their emissions. In contrast, we estimated a 30% climate benefit from switching traditional cookstoves to gasifier ones. Of all the stoves tested, charcoal stoves had the lowest emissions and climate impacts. Our data suggests the widespread deployment of improved cookstoves to replace existing, inefficient, traditional cookstoves will likely result in health and climate co-benefits. Similarly, we estimated that the rapid adoption of GDI vehicles to replace existing port fuel injection (PFI) vehicles will likely result in reduced warming from emissions. This is due to the higher fuel economy of GDI engines; we measured an average CO2 reduction of 57 g/mi, from switching engine technologies. GDI engine emissions had higher PM emissions compared to PFI engines, similar to previous findings. In addition, our data suggests that newer GDI engines have a factor of two lower PM emissions compared to older GDI engines. These improvements in emissions may enable GDI-equipped vehicles to meet the new Federal Tier 3 PM standard of 3.0 mg/mi without gasoline particulate filters (GPF, which would reduce their fuel economy). To better constrain the large uncertainty of radiative forcing associated with cookstove emissions, this dissertation examines emissions and optical properties from several cookstove and fuel combinations. We performed extensive laboratory measurements of the optical properties of fresh cookstove emissions using the newly developed…
Subjects/Keywords: Cookstoves; gasoline direct injection; Growth rates; Mie theory; Optical properties; Vehicles
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Saliba, G. (2018). Emissions and Climate Impacts of Aerosol Emissions from Cookstoves and Gasoline Direct Injection Vehicles. (Thesis). Carnegie Mellon University. Retrieved from http://repository.cmu.edu/dissertations/1126
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Saliba, Georges. “Emissions and Climate Impacts of Aerosol Emissions from Cookstoves and Gasoline Direct Injection Vehicles.” 2018. Thesis, Carnegie Mellon University. Accessed February 28, 2021.
http://repository.cmu.edu/dissertations/1126.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Saliba, Georges. “Emissions and Climate Impacts of Aerosol Emissions from Cookstoves and Gasoline Direct Injection Vehicles.” 2018. Web. 28 Feb 2021.
Vancouver:
Saliba G. Emissions and Climate Impacts of Aerosol Emissions from Cookstoves and Gasoline Direct Injection Vehicles. [Internet] [Thesis]. Carnegie Mellon University; 2018. [cited 2021 Feb 28].
Available from: http://repository.cmu.edu/dissertations/1126.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Saliba G. Emissions and Climate Impacts of Aerosol Emissions from Cookstoves and Gasoline Direct Injection Vehicles. [Thesis]. Carnegie Mellon University; 2018. Available from: http://repository.cmu.edu/dissertations/1126
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Rochester
23.
Moore, Nicole J. (1982 - ).
Focused monochromatic fields.
Degree: PhD, 2011, University of Rochester
URL: http://hdl.handle.net/1802/14418
► The recent trend in applications that rely on focal fields has been toward increasingly high-aperture systems, which cannot be described by the paraxial theory. This…
(more)
▼ The recent trend in applications that rely on focal
fields has been toward increasingly
high-aperture systems, which
cannot be described by the paraxial theory.
This trend is related
to desired increases in resolution, energy density or both,
depending on the application in question. In this thesis, the upper
bound on
the focal energy density (irradiance) is found for both
scalar and electromagnetic
fields with any directional spread and
given total power.
The remainder of the thesis is devoted to
efficient modeling of focused fields
with directional spread too
great to be modeled by paraxial fields, but with a
distinct
direction of propagation. New, efficient bases for both scalar and
electromagnetic
fields of this type are proposed. The use of these
bases is demonstrated
on several simple models of focused fields,
including a focused Gaussian beam with
spherical aberration, an
elliptical focused Gaussian beam, and focused beams with
radial,
azimuthal and linear polarization.
Lastly, an application to Mie
scattering of focused fields is included. Here, a
simple closed
form solution is given for the scattering of nonparaxial analogues
to
scalar Gaussian, radially- and azimuthally-polarized donut
beams, and linearly-polarized
Gaussian beams incident on a
spherical scatterer. Included here are
examples of the scattering
of each of these types of beams from a small dielectric
sphere.
Subjects/Keywords: Discrete basis expansions; Mie scattering; High aperture fields
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moore, N. J. (. -. ). (2011). Focused monochromatic fields. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/14418
Chicago Manual of Style (16th Edition):
Moore, Nicole J (1982 - ). “Focused monochromatic fields.” 2011. Doctoral Dissertation, University of Rochester. Accessed February 28, 2021.
http://hdl.handle.net/1802/14418.
MLA Handbook (7th Edition):
Moore, Nicole J (1982 - ). “Focused monochromatic fields.” 2011. Web. 28 Feb 2021.
Vancouver:
Moore NJ(-). Focused monochromatic fields. [Internet] [Doctoral dissertation]. University of Rochester; 2011. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1802/14418.
Council of Science Editors:
Moore NJ(-). Focused monochromatic fields. [Doctoral Dissertation]. University of Rochester; 2011. Available from: http://hdl.handle.net/1802/14418

University of Rochester
24.
Draham, Robert L.
Phase-sensitive angular light-scattering microscopy of
single cells.
Degree: PhD, 2020, University of Rochester
URL: http://hdl.handle.net/1802/35857
► Angular scattering measurements of cells can provide information about the organelles within. By fitting these measurements with scattering curves modeled with Mie theory, estimates for…
(more)
▼ Angular scattering measurements of cells can
provide information about the organelles
within. By fitting these
measurements with scattering curves modeled with Mie theory,
estimates for the size distribution of organelles have been
obtained. While this
has been done for ensembles of cells, we are
interested in obtaining this information
at the single-cell level.
However, in order to be able to study many individual
cells in
parallel, complex-field information is required. This is because
with traditional
intensity-based measurements, without the phase
information, the individual
cell information is lost.
Field-based
measurements of angular scattering is a relatively unexplored area.
In
this thesis we present a new field-based angular scattering
microscope system. This
system uses a spatial light modulator
placed in a Fourier plane to apply phase shifts to
the unscattered
light relative to the scattered light and obtains complex-field
images
of a sample through phase-shifting interferometry. Unlike
similar systems developed
for quantitative phase imaging, this
system was optimized for angular scattering, with
a focus on
maximizing the range of angles that could be measured.
The
performance of this system was characterized by measuring the
scattering
from polystyrene beads of known sizes between 1 and 5
microns. Size estimates were
obtained that were consistent with
the manufacturer’s specifications and with an
uncertainty on the
scale of 10s of nanometers. To better approximate the refractive
index contrast found in single cells, measurements of beads in
glycerol were also
performed.
Cell measurements involved
measurements of yeast cells, macrophages, and cardiomyocytes.
The
scattering measurements from these cells were all above the system
background and served different purposes. Yeast cells in particular
served as a first
test of the scattering signal strength from
cells while also having scattering patterns
that were similar in
appearance to beads. Measurements of macrophages at different
stages of antibody-dependent cellular phagocytosis were performed
to demonstrate
the system’s ability to detect changes in the
cell’s scattering caused by the presence of
phagocytosed material
within. Cardiomyocyte measurements demonstrated the system’s
ability to extract plausible size estimates of the organelles that
were consistent
with those reported for mitochondria. The limiting
factor to the accuracy of these
size estimates was speckle noise.
Future work with this system will involve mitigating
this noise
source as well as time-lapse studies of cells undergoing an induced
process.
Subjects/Keywords: Angular scattering; Mie theory; Quantitative phase imaging; Single cells
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Draham, R. L. (2020). Phase-sensitive angular light-scattering microscopy of
single cells. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/35857
Chicago Manual of Style (16th Edition):
Draham, Robert L. “Phase-sensitive angular light-scattering microscopy of
single cells.” 2020. Doctoral Dissertation, University of Rochester. Accessed February 28, 2021.
http://hdl.handle.net/1802/35857.
MLA Handbook (7th Edition):
Draham, Robert L. “Phase-sensitive angular light-scattering microscopy of
single cells.” 2020. Web. 28 Feb 2021.
Vancouver:
Draham RL. Phase-sensitive angular light-scattering microscopy of
single cells. [Internet] [Doctoral dissertation]. University of Rochester; 2020. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1802/35857.
Council of Science Editors:
Draham RL. Phase-sensitive angular light-scattering microscopy of
single cells. [Doctoral Dissertation]. University of Rochester; 2020. Available from: http://hdl.handle.net/1802/35857

University of Alberta
25.
Ho, Timothy Then-Siong.
Development of compact fluorescent spectrometers and field
deployable optical solids content monitoring devices.
Degree: MS, Department of Electrical and Computer
Engineering, 2014, University of Alberta
URL: https://era.library.ualberta.ca/files/jw827c91c
► Two techniques were used to develop industrial and environmental sensing devices: fluorescence spectrometry and light scatter. The focus of the thesis is to develop real-time,…
(more)
▼ Two techniques were used to develop industrial and
environmental sensing devices: fluorescence spectrometry and light
scatter. The focus of the thesis is to develop real-time, portable
and economical sensors using these techniques for environmental
detection and management of tailings slurries. A compact
fluorescence spectrometer compatible with cone penetration was
developed for hydrocarbon contamination in soils. To be compatible,
the device was designed to fit into a 25 mm diameter tube. To
simplify the alignment of optics in a small space, 5 long-pass
filters were used to divide the fluorescence spectrum for spectral
analysis. A 405 nm wavelength laser diode was used as the
excitation source because of its high output, sufficiently high
photon energy and cost-effectiveness. Fluorescence results were
obtained and show capability to differentiate between several
fluorescence spectra. The light scatter intensity of highly
concentrated slurries, typically 30% w/w to 70% w/w, was
investigated using blue (405 nm wavelength) and red (639 to 650 nm
wavelengths) laser diodes. First, a small test cylinder was used to
learn about the relationship between light scattered and solids
content of a sample. A ring device was also constructed for use
with cuvettes to analyse the angular distribution of the light
scatter and light scatter intensity for various samples including
different tailings slurries and polystyrene beads. This ring was
also used to develop a calibration relationship between solids
content and relative amount of light scattered. Using the
relationship established, 3 different sensor systems were developed
under differing criteria to measure concentration (or solids
content) of slurries undergoing 3 methods of dewatering. A
centrifuge sensor was made to withstand 100 times gravity and
measure in real time. A 3 m tall device was built to continuously
monitor the progress of tailings with flocculants settling over the
course of a year. Finally, a sensor was designed to measure
changing solids content of slurries being actively processed in a
pipeline, using a credit-card sized economical microprocessor as
the main computation device. These three devices were field tested
and show light scatter sensitivity to the changing solids
content.
Subjects/Keywords: light scatter; oil sands; spectrometer; tar sands; fluorescence; mie scatter; tailings
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ho, T. T. (2014). Development of compact fluorescent spectrometers and field
deployable optical solids content monitoring devices. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/jw827c91c
Chicago Manual of Style (16th Edition):
Ho, Timothy Then-Siong. “Development of compact fluorescent spectrometers and field
deployable optical solids content monitoring devices.” 2014. Masters Thesis, University of Alberta. Accessed February 28, 2021.
https://era.library.ualberta.ca/files/jw827c91c.
MLA Handbook (7th Edition):
Ho, Timothy Then-Siong. “Development of compact fluorescent spectrometers and field
deployable optical solids content monitoring devices.” 2014. Web. 28 Feb 2021.
Vancouver:
Ho TT. Development of compact fluorescent spectrometers and field
deployable optical solids content monitoring devices. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Feb 28].
Available from: https://era.library.ualberta.ca/files/jw827c91c.
Council of Science Editors:
Ho TT. Development of compact fluorescent spectrometers and field
deployable optical solids content monitoring devices. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/jw827c91c

Texas A&M University
26.
Selam, Muaz Ahmed.
Modeling Electrolyte Solutions in a Statistical Associating Fluid Theory (SAFT) Framework.
Degree: MS, Chemical Engineering, 2017, Texas A&M University
URL: http://hdl.handle.net/1969.1/165855
► SAFT-VR Mie is one of the most recent extensions of Statistical Associating Fluid Theory (SAFT). It is based on the Mie potential, which is a…
(more)
▼ SAFT-VR
Mie is one of the most recent extensions of Statistical Associating Fluid Theory (SAFT). It is based on the
Mie potential, which is a generalized form of the Lennard-Jones potential in which the exponents of the repulsive and attractive terms are allowed to vary from 12 and 6, respectively. In this thesis, the latest formulation of SAFT-VR
Mie is implemented to accurately calculate densities and phase equilibria of both associating and non-associating fluid mixtures. The model is subsequently extended to mixtures with strongly dissociating electrolytes in water through the addition of a Born term to account for solvation effects and a Debye-Hückel term for long-range, electrostatic interactions. A single adjustable parameter is assigned to each ionic species (the cross dispersion energy between the ion and solvent) and is optimized against experimental data for electrolyte solution densities and mean ionic activity coefficients using a sequential Nelder-Mead algorithm with a parallel objective function evaluation.
Model correlations for the activity coefficients and liquid densities, as well as predictive calculations of vapor pressure, osmotic coefficients and mixed ion properties, show that the model’s performance is comparable to that of other recent formulations for electrolyte solutions. Further improvement in a subsequent generation of the proposed equation of state will likely derive from a better description of dielectric phenomena, and adjustments to the parameter optimization strategy.
Advisors/Committee Members: Economou, Ioannis (advisor), Castier, Marcelo (advisor), Bouhali, Othmane (committee member).
Subjects/Keywords: Statistical Associating Fluid Theory; SAFT-VR Mie; electrolytes
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APA (6th Edition):
Selam, M. A. (2017). Modeling Electrolyte Solutions in a Statistical Associating Fluid Theory (SAFT) Framework. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/165855
Chicago Manual of Style (16th Edition):
Selam, Muaz Ahmed. “Modeling Electrolyte Solutions in a Statistical Associating Fluid Theory (SAFT) Framework.” 2017. Masters Thesis, Texas A&M University. Accessed February 28, 2021.
http://hdl.handle.net/1969.1/165855.
MLA Handbook (7th Edition):
Selam, Muaz Ahmed. “Modeling Electrolyte Solutions in a Statistical Associating Fluid Theory (SAFT) Framework.” 2017. Web. 28 Feb 2021.
Vancouver:
Selam MA. Modeling Electrolyte Solutions in a Statistical Associating Fluid Theory (SAFT) Framework. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1969.1/165855.
Council of Science Editors:
Selam MA. Modeling Electrolyte Solutions in a Statistical Associating Fluid Theory (SAFT) Framework. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/165855

Penn State University
27.
Namin, Frank Azadi.
Nature-inspired optimization of quasicrystalline
arrays and all-dielectric optical filters and
metamaterials.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/16100
► Quasicrystalline solids were first observed in nature in 1980s. Their lattice geometry is devoid of translational symmetry; however it possesses long-range order as well as…
(more)
▼ Quasicrystalline solids were first observed in nature in 1980s. Their lattice geometry is devoid of translational symmetry; however it possesses long-range order as well as certain orders of rotational symmetry forbidden by translational symmetry. Mathematically, such lattices are related to aperiodic tilings. Since their discovery there has been great interest in utilizing aperiodic geometries for a wide variety of electromagnetic (EM) and optical applications. The first thrust of this dissertation addresses applications of quasicrystalline geometries for wideband antenna arrays and plasmonic nano-spherical arrays. The first application considered is the design of suitable antenna arrays for micro-UAV (unmanned aerial vehicle) swarms based on perturbation of certain types of aperiodic tilings. Due to safety reasons and to avoid possible collision between micro-UAVs it is desirable to keep the minimum separation distance between the elements several wavelengths. As a result typical periodic planar arrays are not suitable, since for periodic arrays increasing the minimum element spacing beyond one wavelength will lead to the appearance of grating lobes in the radiation pattern. It will be shown that using this method antenna arrays with very wide bandwidths and low sidelobe levels can be designed. It will also be shown that in conjunction with a phase compensation method these arrays show a large degree of versatility to positional noise. Next aperiodic aggregates of gold nano-spheres are studied. Since traditional unit cell approaches cannot be used for aperiodic geometries, we start be developing new analytical tools for aperiodic arrays. A modified version of generalized
Mie theory (GMT) is developed which defines scattering coefficients for aperiodic spherical arrays. Next two specific properties of quasicrystalline gold nano-spherical arrays are considered. The optical response of these arrays can be explained in terms of the grating response of the array (photonic resonance) and the plasmonic response of the spheres (plasmonic resonance). In particular the couplings between the photonic and plasmonic modes are studied. In periodic arrays this coupling leads to the formation of a so called photonic-plasmonic hybrid mode. The formation of hybrid modes is studied in quasicrystalline arrays. Quasicrystalline structures in essence possess several periodicities which in some cases can lead to the formation of multiple hybrid modes with wider bandwidths. It is also demonstrated that the performance of these arrays can be further enhanced by employing a perturbation method. The second property considered is local field enhancements in quasicrystalline arrays of gold nanospheres. It will be shown that despite a considerably smaller filling factor quasicrystalline arrays generate larger local field enhancements which can be even further enhanced by optimally placing perturbing spheres within the prototiles that comprise the aperiodic arrays.
The second thrust of research in this dissertation focuses on designing…
Advisors/Committee Members: Douglas Henry Werner, Dissertation Advisor/Co-Advisor, Douglas Henry Werner, Committee Chair/Co-Chair, Pingjuan Li Werner, Committee Member, Julio Urbina, Committee Member, Brian Lewis Weiner, Committee Member.
Subjects/Keywords: Quasicrystals; generalized Mie scattering; metamaterials; optical filters; genetic algorithms.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Namin, F. A. (2012). Nature-inspired optimization of quasicrystalline
arrays and all-dielectric optical filters and
metamaterials. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/16100
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Namin, Frank Azadi. “Nature-inspired optimization of quasicrystalline
arrays and all-dielectric optical filters and
metamaterials.” 2012. Thesis, Penn State University. Accessed February 28, 2021.
https://submit-etda.libraries.psu.edu/catalog/16100.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Namin, Frank Azadi. “Nature-inspired optimization of quasicrystalline
arrays and all-dielectric optical filters and
metamaterials.” 2012. Web. 28 Feb 2021.
Vancouver:
Namin FA. Nature-inspired optimization of quasicrystalline
arrays and all-dielectric optical filters and
metamaterials. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Feb 28].
Available from: https://submit-etda.libraries.psu.edu/catalog/16100.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Namin FA. Nature-inspired optimization of quasicrystalline
arrays and all-dielectric optical filters and
metamaterials. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/16100
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
28.
Dong, Guan-Ting.
Surface Plasmon Assisted Transient Transmission Effect in Photosensitive Liquid Crystal Cell.
Degree: Master, Electro-Optical Engineering, 2017, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811117-114010
► Surface plasmon resonance (SPR) is sensitive to the surface structure, metal properties and refractive index of the upper layer. Liquid crystal is anisotropic material. In…
(more)
▼ Surface plasmon resonance (SPR) is sensitive to the surface structure, metal properties and refractive index of the upper layer.
Liquid crystal is anisotropic material. In optics, the refractive index varies with the direction of the light entering the liquid crystal. 5CB liquid crystal doped with 1205 azo-dyes is used in the experiment. The azo-LC layer could be switched between isotropic and nematic phases by irradiating with UV laser or green laser. Liquid crystal micro domains (formed between isotropic and nematic phases) were generated during phase transition process. These micro domains caused
Mie scattering.
In this research, we injected the azo-LC into a liquid crystal cell with aluminum metallic grating, and used 1205 azo-LC as a switch to control the coupled of surface plasmon resonance. During the phase change process of azo-LC, the micro particles appears in the azo-LC layer. And this micro particles caused
Mie scattering effect to the incident light. The
Mie scattering effect to the incident light provides much horizontal k-vectors on metal surface and increases the probability for the light to couple the surface plasmon resonance.
Advisors/Committee Members: Yu-Ju Hung (committee member), Shiuan-Yeh Chen (chair), Shie-Chang Jeng (chair).
Subjects/Keywords: Surface plasmon resonance; Azo-dye; Liquid crystal; Mie scattering; Anisotropic
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dong, G. (2017). Surface Plasmon Assisted Transient Transmission Effect in Photosensitive Liquid Crystal Cell. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811117-114010
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dong, Guan-Ting. “Surface Plasmon Assisted Transient Transmission Effect in Photosensitive Liquid Crystal Cell.” 2017. Thesis, NSYSU. Accessed February 28, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811117-114010.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dong, Guan-Ting. “Surface Plasmon Assisted Transient Transmission Effect in Photosensitive Liquid Crystal Cell.” 2017. Web. 28 Feb 2021.
Vancouver:
Dong G. Surface Plasmon Assisted Transient Transmission Effect in Photosensitive Liquid Crystal Cell. [Internet] [Thesis]. NSYSU; 2017. [cited 2021 Feb 28].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811117-114010.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dong G. Surface Plasmon Assisted Transient Transmission Effect in Photosensitive Liquid Crystal Cell. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811117-114010
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
29.
Zhang, Fuli.
Technologies des métamatériaux électromagnétiques en volume : application aux éléments de guidage et de rayonnement : Electromagnetic bulk metamaterial technologies : application to microwave guiding and radiating elements.
Degree: Docteur es, Microondes et microtechnologies, 2009, Université Lille I – Sciences et Technologies
URL: http://www.theses.fr/2009LIL10058
► Les métamatériaux, de par leurs propriétés originales de dispersion, sont de plus en plus étudiés. Cette thèse s’inscrit dans ce contexte en mettant un accent…
(more)
▼ Les métamatériaux, de par leurs propriétés originales de dispersion, sont de plus en plus étudiés. Cette thèse s’inscrit dans ce contexte en mettant un accent particulier sur les structures composites équilibrées, de faibles pertes, l’agilité et les résonances de Mie. Une structure dont le motif élémentaire a la forme d’une lettre oméga est proposée en satisfaisant la condition d’équilibre. La mesure expérimentale confirme une bande passante de 8 à 16 GHz avec un point d’indice nul à 13.6 GHz. Un raisonnement identique est appliqué afin de fabriquer un prototype fonctionnement en bande millimétrique. La bande main gauche est observée aux alentours de 80 GHz avec de faibles pertes d’insertion (0.5dB/cellule). L’agilité de cette structure peut être réalisée à l’aide de cristaux liquides nématiques. Des résonateurs à anneaux fendus (SRR) ont été rendus agiles par ce biais et montrent un décalage fréquentiel du pic de résonance d’environ 300 MHz par l’application d’un champ magnétique extérieur. Par la suite, la commande d’un prototype « main gauche » est aussi effectuée. Enfin, les résonances de Mie à travers des cubes de Ba0.5Sr0.5TiO3 (BST) sont étudiées afin de créer une particule magnétique isotrope. Cette voie permettant de synthétiser le magnétisme artificiel, une application d’amélioration de la directivité des antennes est ici montrée. De plus, un dispositif d’invisibilité en technologie « tout diélectrique » est étudié par calcul numérique.
Recently, metamaterial has attracted much attention due to unique property such as negative index. This thesis is devoted to various aspects of this field: left and right handed balanced structure, low loss, tunability and Mie resonance based metamaterial. An omega-like left and right handed balanced metamaterial was proposed following the guideline of equality of magnetic and electric plasma frequency. It is shown that this metamaterial exhibits a broad passband from 8.0 - 16.0 GHz with a transition frequency at 13.6 GHz between negative and positive index branches. Then, an omega-type left handed metamaterial (LHM) operating at millimeter wavelengths was fabricated. The left handed passband centered around 80 GHz was observed. The low insertion loss of -0.5 dB/cell may meet requirement of practical application. We studied tunable metamaterial based on nematic liquid crystal. Magnetically tunable split ring resonator shows a resonance dip shift of 300 MHz under external magnetic field. Then a tunable LHM was fabricated. Effective index variation of 0.25 arising from liquid crystal reorientation was found. Finally, we investigated Mie resonance based dielectric resonator and its related application. Ba0.5Sr0.5TiO3 (BST) cube exhibits isotropic magnetic resonance for tilted incidence. Besides, a thin layer of BST cubes can perform as an artificial magnetic conductor (AMC) due to in-phase reflection around magnetic resonance. Such an AMC enhances directivity of antenna more than two times. In addition, a full dielectric cloak was also demonstrated numerically by radically…
Advisors/Committee Members: Lippens, Didier (thesis director).
Subjects/Keywords: Agilité en fréquence; Résonance de Mie; Résonateur magnétique artificiel
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, F. (2009). Technologies des métamatériaux électromagnétiques en volume : application aux éléments de guidage et de rayonnement : Electromagnetic bulk metamaterial technologies : application to microwave guiding and radiating elements. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2009LIL10058
Chicago Manual of Style (16th Edition):
Zhang, Fuli. “Technologies des métamatériaux électromagnétiques en volume : application aux éléments de guidage et de rayonnement : Electromagnetic bulk metamaterial technologies : application to microwave guiding and radiating elements.” 2009. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed February 28, 2021.
http://www.theses.fr/2009LIL10058.
MLA Handbook (7th Edition):
Zhang, Fuli. “Technologies des métamatériaux électromagnétiques en volume : application aux éléments de guidage et de rayonnement : Electromagnetic bulk metamaterial technologies : application to microwave guiding and radiating elements.” 2009. Web. 28 Feb 2021.
Vancouver:
Zhang F. Technologies des métamatériaux électromagnétiques en volume : application aux éléments de guidage et de rayonnement : Electromagnetic bulk metamaterial technologies : application to microwave guiding and radiating elements. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2009. [cited 2021 Feb 28].
Available from: http://www.theses.fr/2009LIL10058.
Council of Science Editors:
Zhang F. Technologies des métamatériaux électromagnétiques en volume : application aux éléments de guidage et de rayonnement : Electromagnetic bulk metamaterial technologies : application to microwave guiding and radiating elements. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2009. Available from: http://www.theses.fr/2009LIL10058

University of Manchester
30.
Bassan, Paul.
Light scattering during infrared spectroscopic
measurements of biomedical samples.
Degree: 2011, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:131823
► Infrared (IR) spectroscopy has shown potential to quickly and non-destructively measure the chemical signatures of biomedical samples such as single biological cells, and tissue from…
(more)
▼ Infrared (IR) spectroscopy has shown potential to
quickly and non-destructively measure the chemical signatures of
biomedical samples such as single biological cells, and tissue from
biopsy. The size of a single cell (diameter ~10 – 50 µm) are of a
similar magnitude to the mid-IR wavelengths of light ( ~1 – 10 µm)
giving rise to
Mie-type scattering. The result of this scattering
is that chemical information is significantly distorted in the IR
spectrum.Distortions in biomedical IR spectra are often observed as
a broad oscillating baseline on which the absorbance spectrum is
superimposed. A spectral feature commonly observed is the sharp
decrease in intensity at approximately 1700 cm-1, next to the Amide
I band (~1655 cm-1), which pre-2009 was called the ‘dispersion
artefact’. The first contributing factor towards the ‘dispersion
artefact’ investigated was the reflection signal arising from the
air to sample interface entering the collection optics during
transflection experiments. This was theoretically modelled, and
then experimentally verified. It was shown that IR mapping could be
done using reflection mode, yielding information from the optically
dense nucleus which previously caused extinction of light in
transmission mode.The most important contribution to the spectral
distortions was due to resonant
Mie scattering (RMieS) which occurs
when the scattering particle is strongly absorbing such as
biomedical samples. RMieS was shown to explain both the baselines
in IR spectra, and the ‘dispersion artefact’ and was validated
using a model system of poly(methyl methacrylate) (PMMA) of varying
sizes from 5 to 15 µm. Theoretical simulations and experimental
data had an excellent match thus proving the theory proposed.With
an understanding of the physics/mathematics of the spectral
distortions, a correction algorithm was written, the RMieS extended
multiplicative signal correction (RMieS-EMSC). This algorithm
modelled the measured spectrum as superposition of a first guess
(the reference spectrum) which was of a similar biochemical
composition to the pure absorbance spectrum of the sample, and a
scattering curve. The scattering curve was estimated as the linear
combination of a database of a large number of scattering curves
covering a range of feasible physical parameters. Simulated and
measured data verified that the RMieS-EMSC increased IR spectral
quality.
Advisors/Committee Members: Gardner, Peter.
Subjects/Keywords: infrared spectroscopy; mie scattering; dispersion artefact; single biological cells
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bassan, P. (2011). Light scattering during infrared spectroscopic
measurements of biomedical samples. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:131823
Chicago Manual of Style (16th Edition):
Bassan, Paul. “Light scattering during infrared spectroscopic
measurements of biomedical samples.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 28, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:131823.
MLA Handbook (7th Edition):
Bassan, Paul. “Light scattering during infrared spectroscopic
measurements of biomedical samples.” 2011. Web. 28 Feb 2021.
Vancouver:
Bassan P. Light scattering during infrared spectroscopic
measurements of biomedical samples. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Feb 28].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:131823.
Council of Science Editors:
Bassan P. Light scattering during infrared spectroscopic
measurements of biomedical samples. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:131823
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