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Delft University of Technology
1.
Guzman Mardones, C.A. (author).
Impact of access channel geometry on wave penetration in harbours.
Degree: 2011, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:1ba13e2e-ba4e-4802-9366-92f7fc00bdfa
► Access channels (entrance channels) to ports are a relevant part of port facilities, and they have a strong influence on the port operations as well.…
(more)
▼ Access channels (entrance channels) to ports are a relevant part of port facilities, and they have a strong influence on the port operations as well. However, little information is available about their analysis and design regarding the wave interaction with access channels. This study is focused on the interaction of waves with entrance channels regarding wave propagation. This report has three parts: i) a qualitatively assessment of diffraction effects carried out with SWAN; ii) a comparison between SWAN (phase averaged wave model) and SWASH (phase resolving model) results, regarding refraction and diffraction effects; and ii) a systematic analysis of the results in SWAN on several wave conditions and a few access channel geometries (slopes). SWASH is used to test SWAN capabilities in an environment where significant refraction and diffraction is expected. The results of the comparison are analyzed and recommendations for future comparison are presented. The systematic analysis of conditions provides information about performance of SWAN and its ability to correctly represent physical phenomena particularly regarding refraction and diffraction. Additionally, recommendations for wave propagation analysis for entrance channels are presented. Finally, based on the results, engineering recommendations and considerations are presented regarding operations of ports and the design of related structures such as breakwaters.
CoMEM - Coastal and Marine Engineering and Management
Hydraulic Engineering
Civil Engineering and Geosciences
Advisors/Committee Members: Stive, M.J.F. (mentor), Van Overeem, J. (mentor), Van Vledder, G.P. (mentor), Zijlema, M. (mentor).
Subjects/Keywords: access channel; wave propagation; diffraction
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Chicago ·
MLA ·
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APA (6th Edition):
Guzman Mardones, C. A. (. (2011). Impact of access channel geometry on wave penetration in harbours. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:1ba13e2e-ba4e-4802-9366-92f7fc00bdfa
Chicago Manual of Style (16th Edition):
Guzman Mardones, C A (author). “Impact of access channel geometry on wave penetration in harbours.” 2011. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:1ba13e2e-ba4e-4802-9366-92f7fc00bdfa.
MLA Handbook (7th Edition):
Guzman Mardones, C A (author). “Impact of access channel geometry on wave penetration in harbours.” 2011. Web. 04 Mar 2021.
Vancouver:
Guzman Mardones CA(. Impact of access channel geometry on wave penetration in harbours. [Internet] [Masters thesis]. Delft University of Technology; 2011. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:1ba13e2e-ba4e-4802-9366-92f7fc00bdfa.
Council of Science Editors:
Guzman Mardones CA(. Impact of access channel geometry on wave penetration in harbours. [Masters Thesis]. Delft University of Technology; 2011. Available from: http://resolver.tudelft.nl/uuid:1ba13e2e-ba4e-4802-9366-92f7fc00bdfa

Delft University of Technology
2.
Maroudi, Konstantina (author).
Advanced modelling of wave penetration in ports.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:a824d040-5176-4a2c-9890-2831c1bab3b4
► A main challenge port engineers had to tackle in recent years is wave penetration inside a harbour, as it determines vessels’ safe sailing and mooring,…
(more)
▼ A main challenge port engineers had to tackle in recent years is
wave penetration inside a harbour, as it determines vessels’ safe sailing and mooring, possibly causes unwanted vessel movements, and unequivocally regulates the execution of port operations. A physical scale model can describe
wave penetration in a complete way. However, the construction of a physical scale model is expensive and time consuming. For this reason, nowadays several numerical models are used to describe
wave penetration in ports, affected by multiple processes such as
diffraction, partial reflection, etc. In this study, the simulation of
wave penetration with the non-hydrostatic model SWASH is examined. To validate the numerical model, output of an open benchmark dataset of Deltares (Deltares, 2016) is used, consisting of physical scale model tests of schematic port layouts. As
wave penetration is a summation of physical processes, each process should be described accurately by SWASH. This thesis focuses on assessing how SWASH models
wave penetration per
wave process, first separately by means of simplified models and then combined in a model describing the full harbour layout resulting to the final
wave field inside a port. The main topics of interest of the formulated research questions are the ability of SWASH to simulate
wave propagation,
wave celerity and the effect of two dominant
wave processes: reflection and
diffraction. As the amount of processes influencing
wave penetration increases for higher layout complexity, the research was targeted at the simplest port layout considered in the benchmark dataset (Deltares, 2016). Moreover, only regular waves were taken into account, as in this case the differences between the measurements and the computational results are most easily identified. To better understand the influence of reflection the waves, two simplified one-dimensional SWASH models were designed. The first model simulated reflection in front of a gravel slope, located outside the harbour basin, and the second model reflection in front of the harbour basin end, consisting of a gravel slope and a concrete quay wall behind it. The results suggest that outside the basin the reflection off the gravel slope has a minor effect in comparison to the reflection off a vertical quay wall. Inside the harbour basin,
wave reflection played a dominant role on the resulting
wave field there. The SWASH models were proven to be robust as the
wave height in the computational domain did not change considerably for an increase or decrease of the porosity of a gravel slope by 10%. It should be emphasised that the standing
wave heights were altering fast within a short horizontal distance. Therefore, the precise
wave height values were strongly influenced by the exact location of the output points examined. The importance of
diffraction inside the harbour was demonstrated by a simplified two-dimensional model, in which reflection off the harbour end was not included. The information that could be obtained from the measurements about the
wave…
Advisors/Committee Members: van Koningsveld, Mark (mentor), Zijlema, Marcel (graduation committee), van der Hout, Arne (graduation committee), Reijmerink, S.P. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: wave penetration; port; wave modelling; SWASH; Reflection; Diffraction; Harbour
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Maroudi, K. (. (2019). Advanced modelling of wave penetration in ports. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a824d040-5176-4a2c-9890-2831c1bab3b4
Chicago Manual of Style (16th Edition):
Maroudi, Konstantina (author). “Advanced modelling of wave penetration in ports.” 2019. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:a824d040-5176-4a2c-9890-2831c1bab3b4.
MLA Handbook (7th Edition):
Maroudi, Konstantina (author). “Advanced modelling of wave penetration in ports.” 2019. Web. 04 Mar 2021.
Vancouver:
Maroudi K(. Advanced modelling of wave penetration in ports. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:a824d040-5176-4a2c-9890-2831c1bab3b4.
Council of Science Editors:
Maroudi K(. Advanced modelling of wave penetration in ports. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:a824d040-5176-4a2c-9890-2831c1bab3b4

University of Southern California
3.
Amornwongpaibun, Alongkorn.
Diffraction of anti-plane (SH) waves by surface elliptical
topographies in an elastic half-space.
Degree: PhD, Civil Engineering, 2011, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/659137/rec/1992
► The study presented in this dissertation aims at the ground motion assessment of various two-dimensional hill models subjected to incident plane SH waves in an…
(more)
▼ The study presented in this dissertation aims at the
ground motion assessment of various two-dimensional hill models
subjected to incident plane SH waves in an elastic half-space. The
exact, analytic solutions to the boundary-valued problem, based on
method of
wave function expansion in elliptical coordinate are
presented. These require the technique of angular half-range
expansion in elliptical coordinate to deal with mixed-boundary
condition arisen during mathematical implementation of all hill
models; the traction-free boundary condition at the surface of the
elliptical hill and the continuity of displacement and stress at
the semi-elliptical interface. ❧ In the study we found out that the
existence of a hill results in complex pattern of surface
displacement. Generally for nearly grazing angle, a hill shields
the propagating waves, resulting in a standing
wave pattern in the
coming direction and the focusing of the amplitude at the far edge
of the hill. In addition the presence of full-elliptical tunnels
resulted in more prominent standing waves, and amplitudes of ground
motion in the neighborhood of unity or less on the far end may be
monitored without the abrupt jump at that edge of the. We
discovered that the presence of a full-elliptical tunnel amplifies
maximum displacement by 30%-70% from corresponding value of
reference (inexistence of a tunnel) for the horizontal incidence
and de-amplifies maximum displacement in the range of 1%-15% for
the vertical incidence; note that these amplifying and
de-amplifying effects are dependent on the size of tunnels. The
bigger the tunnel is, the stronger the effects are. ❧ We also found
out that the effect of the semi-elliptical tunnels on ground
surface motion is dissimilar to the effect of the full-elliptical
ones. Since horizontal incidences are able to slip underneath
semi-tunnels, the weaker standing waves on the left side and weaker
shadow zones associated with high jumps of the displacement
amplitude at the far edge of the hill are observed. However, when
the incident waves are nearly vertical, the stronger shielding
effect due to semi-elliptical tunnels than to full-elliptical ones
are detected. It could be said that the hinder efficiency of an
elliptical tunnel depends on the direction of
wave passage; the
tunnel becomes better obstruction when the incidence is propagating
normal to its major axis.
Advisors/Committee Members: Lee, Vincent W. (Committee Chair), Wong, Hung Leung (Committee Member), Udwadia, Firdaus E. (Committee Member).
Subjects/Keywords: anti-plane wave; diffraction; elliptical; scattering; SH wave
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Amornwongpaibun, A. (2011). Diffraction of anti-plane (SH) waves by surface elliptical
topographies in an elastic half-space. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/659137/rec/1992
Chicago Manual of Style (16th Edition):
Amornwongpaibun, Alongkorn. “Diffraction of anti-plane (SH) waves by surface elliptical
topographies in an elastic half-space.” 2011. Doctoral Dissertation, University of Southern California. Accessed March 04, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/659137/rec/1992.
MLA Handbook (7th Edition):
Amornwongpaibun, Alongkorn. “Diffraction of anti-plane (SH) waves by surface elliptical
topographies in an elastic half-space.” 2011. Web. 04 Mar 2021.
Vancouver:
Amornwongpaibun A. Diffraction of anti-plane (SH) waves by surface elliptical
topographies in an elastic half-space. [Internet] [Doctoral dissertation]. University of Southern California; 2011. [cited 2021 Mar 04].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/659137/rec/1992.
Council of Science Editors:
Amornwongpaibun A. Diffraction of anti-plane (SH) waves by surface elliptical
topographies in an elastic half-space. [Doctoral Dissertation]. University of Southern California; 2011. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/659137/rec/1992

Virginia Tech
4.
Xue, Jing.
Wavefront Healing and Tomographic Resolution of Mantle Plumes.
Degree: MS, Geosciences, 2014, Virginia Tech
URL: http://hdl.handle.net/10919/50423
► To investigate seismic resolution of deep mantle plumes as well as the robustness of the anti-correlation between bulk sound speed and S wave speed imaged…
(more)
▼ To investigate seismic resolution of deep mantle plumes as well as the robustness of the anti-correlation between bulk sound speed and S
wave speed imaged in the lowermost mantle, we use a Spectral Element Method (SEM) to simulate global seismic
wave propagation in 3-D wavespeed models and measure frequency-dependent P-, S-, Pdiff- and Sdiff-
wave traveltime anomalies caused by plume structures in the lowermost mantle. We compare SEM time delay measurements with calculations based on ray theory and show that an anti-correlation between bulk sound speed and S-
wave speed could be produced as an artifact. This is caused by different wavefront healing effects between P waves and S waves in thermal plume models. The bulk sound speed structure remains poorly resolved when P-
wave and S-
wave measurements are at different periods with similar wavelength. The differences in
wave diffraction between the two types of waves depend on epicentral distance and
wave frequency. The artifact in anti-correlation is also confirmed in tomographic inversions based on ray theory using Pdiff and Sdiff time delay measurements made on the SEM synthetics. This indicates a chemical origin of "superplumes" in the lowermost mantle may not be necessary to explain observed seismic traveltimes. The same set of Pdiff and Sdiff measurements are inverted using finite-frequency tomography based on Born sensitivity kernels. We show that wavefront healing effects can be accounted for in finite-frequency tomography to recover the true velocity model.
Advisors/Committee Members: Zhou, Ying (committeechair), King, Scott D. (committee member), Hole, John Andrew (committee member).
Subjects/Keywords: Seismic tomography; Computational seismology; Theoretical seismology; Wave scattering and diffraction; Wave propagation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Xue, J. (2014). Wavefront Healing and Tomographic Resolution of Mantle Plumes. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/50423
Chicago Manual of Style (16th Edition):
Xue, Jing. “Wavefront Healing and Tomographic Resolution of Mantle Plumes.” 2014. Masters Thesis, Virginia Tech. Accessed March 04, 2021.
http://hdl.handle.net/10919/50423.
MLA Handbook (7th Edition):
Xue, Jing. “Wavefront Healing and Tomographic Resolution of Mantle Plumes.” 2014. Web. 04 Mar 2021.
Vancouver:
Xue J. Wavefront Healing and Tomographic Resolution of Mantle Plumes. [Internet] [Masters thesis]. Virginia Tech; 2014. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10919/50423.
Council of Science Editors:
Xue J. Wavefront Healing and Tomographic Resolution of Mantle Plumes. [Masters Thesis]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/50423

University of Alberta
5.
Subramanian, Venkat Raghavan.
Fabrication of Bragg gratings in silicon-on-insulator
waveguides.
Degree: MS, Department of Electrical and Computer
Engineering, 2002, University of Alberta
URL: https://era.library.ualberta.ca/files/5m60qt52c
Subjects/Keywords: Diffraction gratings.; Optical wave guides.
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Subramanian, V. R. (2002). Fabrication of Bragg gratings in silicon-on-insulator
waveguides. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/5m60qt52c
Chicago Manual of Style (16th Edition):
Subramanian, Venkat Raghavan. “Fabrication of Bragg gratings in silicon-on-insulator
waveguides.” 2002. Masters Thesis, University of Alberta. Accessed March 04, 2021.
https://era.library.ualberta.ca/files/5m60qt52c.
MLA Handbook (7th Edition):
Subramanian, Venkat Raghavan. “Fabrication of Bragg gratings in silicon-on-insulator
waveguides.” 2002. Web. 04 Mar 2021.
Vancouver:
Subramanian VR. Fabrication of Bragg gratings in silicon-on-insulator
waveguides. [Internet] [Masters thesis]. University of Alberta; 2002. [cited 2021 Mar 04].
Available from: https://era.library.ualberta.ca/files/5m60qt52c.
Council of Science Editors:
Subramanian VR. Fabrication of Bragg gratings in silicon-on-insulator
waveguides. [Masters Thesis]. University of Alberta; 2002. Available from: https://era.library.ualberta.ca/files/5m60qt52c

University of Manchester
6.
Gongora Orozco, Nalleli.
Experimental studies on internal shock wave phenomena and
interactions.
Degree: 2010, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:88710
► Unsteady shock waves are formed by the coalescence of pressure waves. The attenuationof pressure and shock waves in general is of great importance in a…
(more)
▼ Unsteady shock waves are formed by the coalescence
of pressure waves. The attenuationof pressure and shock waves in
general is of great importance in a wide varietyof application such
as vehicle performance, health and safety. Previous researcheshave
been carried out on a variety of geometries to understand the
physics. Theaim of this project is to advance the
previous-state-of-the-art and to shed furtherlight into the
fundamental physics associated with the shock
wave interactions
andphenomena.Shock
wave attenuation was studied by using rough
walls in a three-pipe system.The roughness at the walls is added by
placing grooves on the upper and lower wallsof the junctions. The
angles of the branch pipe were varied from 30 to 150 degrees.Shock
wave interactions with a co-flow jet were also examined. All the
experimentswere performed for driver gas (air) pressures of 4, 8,
and 12 bar and atmosphericpressure within the driven section,
giving theoretical Mach number of 1.34, 1.54, and1.66,
respectively. Three different velocities, 114, 138, and 178 m/s,
were used forthe co-flow jet. High-speed schlieren photography,
particle image velocimetry (PIV),and pressure measurements
techniques were employed to visualise and quantify theflow
field.Expansion and compression waves produced by the grooves led
to a highly unsteadyflow field, an increase to the pressure
upstream, and the formation of asecondary shock
wave. The pressure
of the incident shock front was reduced by anestimated 20%. A
maximum of 10% reduction of velocity of the shock front at theexit
was achieved. The shock vortex/ structure led to multiple
reflections, distortionof the vortical field, a lambda-shock
configuration and pressure fluctuations. Theinfluence of the
co-flow jet dissipated the shock/vortex structure, and
attenuatedthe pressure peaks caused by multiple
reflections.Complementing this investigation the testing of
pressure sensitive paints (PSP)for the use of unsteady and high
speed flows was carried out. The results showedthat the use of
luminophores with high intensity output, and pressure
sensitivityapplied on a porous material were the most suitable PSPs
for these applications.
Advisors/Committee Members: Kontis, Konstantinos.
Subjects/Keywords: shock wave; diffraction; reflection
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gongora Orozco, N. (2010). Experimental studies on internal shock wave phenomena and
interactions. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:88710
Chicago Manual of Style (16th Edition):
Gongora Orozco, Nalleli. “Experimental studies on internal shock wave phenomena and
interactions.” 2010. Doctoral Dissertation, University of Manchester. Accessed March 04, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:88710.
MLA Handbook (7th Edition):
Gongora Orozco, Nalleli. “Experimental studies on internal shock wave phenomena and
interactions.” 2010. Web. 04 Mar 2021.
Vancouver:
Gongora Orozco N. Experimental studies on internal shock wave phenomena and
interactions. [Internet] [Doctoral dissertation]. University of Manchester; 2010. [cited 2021 Mar 04].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:88710.
Council of Science Editors:
Gongora Orozco N. Experimental studies on internal shock wave phenomena and
interactions. [Doctoral Dissertation]. University of Manchester; 2010. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:88710

University of Manchester
7.
Gongora Orozco, Nalleli.
Experimental studies on internal shock wave phenomena and interactions.
Degree: PhD, 2010, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-internal-shock-wave-phenomena-and-interactions(6325f185-76a1-483a-9d14-606a6a48374e).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558030
► Unsteady shock waves are formed by the coalescence of pressure waves. The attenuationof pressure and shock waves in general is of great importance in a…
(more)
▼ Unsteady shock waves are formed by the coalescence of pressure waves. The attenuationof pressure and shock waves in general is of great importance in a wide varietyof application such as vehicle performance, health and safety. Previous researcheshave been carried out on a variety of geometries to understand the physics. Theaim of this project is to advance the previous-state-of-the-art and to shed furtherlight into the fundamental physics associated with the shock wave interactions andphenomena. Shock wave attenuation was studied by using rough walls in a three-pipe system. The roughness at the walls is added by placing grooves on the upper and lower wallsof the junctions. The angles of the branch pipe were varied from 30 to 150 degrees. Shock wave interactions with a co-flow jet were also examined. All the experimentswere performed for driver gas (air) pressures of 4, 8, and 12 bar and atmosphericpressure within the driven section, giving theoretical Mach number of 1.34, 1.54, and1.66, respectively. Three different velocities, 114, 138, and 178 m/s, were used forthe co-flow jet. High-speed schlieren photography, particle image velocimetry (PIV),and pressure measurements techniques were employed to visualise and quantify theflow field. Expansion and compression waves produced by the grooves led to a highly unsteadyflow field, an increase to the pressure upstream, and the formation of asecondary shock wave. The pressure of the incident shock front was reduced by anestimated 20%. A maximum of 10% reduction of velocity of the shock front at theexit was achieved. The shock vortex/ structure led to multiple reflections, distortionof the vortical field, a lambda-shock configuration and pressure fluctuations. Theinfluence of the co-flow jet dissipated the shock/vortex structure, and attenuatedthe pressure peaks caused by multiple reflections. Complementing this investigation the testing of pressure sensitive paints (PSP)for the use of unsteady and high speed flows was carried out. The results showedthat the use of luminophores with high intensity output, and pressure sensitivityapplied on a porous material were the most suitable PSPs for these applications.
Subjects/Keywords: 533; shock wave; diffraction; reflection
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gongora Orozco, N. (2010). Experimental studies on internal shock wave phenomena and interactions. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-internal-shock-wave-phenomena-and-interactions(6325f185-76a1-483a-9d14-606a6a48374e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558030
Chicago Manual of Style (16th Edition):
Gongora Orozco, Nalleli. “Experimental studies on internal shock wave phenomena and interactions.” 2010. Doctoral Dissertation, University of Manchester. Accessed March 04, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-internal-shock-wave-phenomena-and-interactions(6325f185-76a1-483a-9d14-606a6a48374e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558030.
MLA Handbook (7th Edition):
Gongora Orozco, Nalleli. “Experimental studies on internal shock wave phenomena and interactions.” 2010. Web. 04 Mar 2021.
Vancouver:
Gongora Orozco N. Experimental studies on internal shock wave phenomena and interactions. [Internet] [Doctoral dissertation]. University of Manchester; 2010. [cited 2021 Mar 04].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-internal-shock-wave-phenomena-and-interactions(6325f185-76a1-483a-9d14-606a6a48374e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558030.
Council of Science Editors:
Gongora Orozco N. Experimental studies on internal shock wave phenomena and interactions. [Doctoral Dissertation]. University of Manchester; 2010. Available from: https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-internal-shock-wave-phenomena-and-interactions(6325f185-76a1-483a-9d14-606a6a48374e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558030

Delft University of Technology
8.
De Lange, P.H.M. (author).
Golfdoordringing in een haven.
Degree: 1992, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:41601bba-3421-48b4-9b63-5b60f47f719c
► Het doel van dit onderzoek is de invloed te onderzoeken van refractie en diffractie bij zowel langkammige als kortkammige golven bij een haven(-ingang). Dit onderzoek…
(more)
▼ Het doel van dit onderzoek is de invloed te onderzoeken van refractie en diffractie bij zowel langkammige als kortkammige golven bij een haven(-ingang). Dit onderzoek concentreert zich op de invloed van golfvoortplanting nabij een haveningang op golfbeweging in een erachter gelegen havengebied. Er wordt gekeken naar de invloeden van refractie, diffractie, richtingsspreiding en reflecties, en in hoeverre verwaarlozing van deze fysische verschijnselen al of niet acceptabel is. Richtingsspectra met verschillende hoofdrichtingen en energieverdelingen worden doorgerekend. De resultaten in de haven worden vergeleken. Als eerste wordt een sterk geschematiseerde haven(-ingang) genomen, daarna een meer complete haven.
Hydraulic Engineering
Civil Engineering and Geosciences
Advisors/Committee Members: Battjes, J.A. (mentor), Booij, N. (mentor), Holthuijsen, L.H. (mentor), Kostense, J.K. (mentor).
Subjects/Keywords: diffraction; harbour tranquility; wave penetration
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
De Lange, P. H. M. (. (1992). Golfdoordringing in een haven. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:41601bba-3421-48b4-9b63-5b60f47f719c
Chicago Manual of Style (16th Edition):
De Lange, P H M (author). “Golfdoordringing in een haven.” 1992. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:41601bba-3421-48b4-9b63-5b60f47f719c.
MLA Handbook (7th Edition):
De Lange, P H M (author). “Golfdoordringing in een haven.” 1992. Web. 04 Mar 2021.
Vancouver:
De Lange PHM(. Golfdoordringing in een haven. [Internet] [Masters thesis]. Delft University of Technology; 1992. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:41601bba-3421-48b4-9b63-5b60f47f719c.
Council of Science Editors:
De Lange PHM(. Golfdoordringing in een haven. [Masters Thesis]. Delft University of Technology; 1992. Available from: http://resolver.tudelft.nl/uuid:41601bba-3421-48b4-9b63-5b60f47f719c

Delft University of Technology
9.
Doorn, N. (author).
Diffraction in a spectral wave model.
Degree: 1997, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:995f7333-a19a-4c33-97eb-99624c101238
► Waves that approach the coast and encounter obstacles such as small islands, rocks or breakwaters may be reflected backwards and in lateral directions, but the…
(more)
▼ Waves that approach the coast and encounter obstacles such as small islands, rocks or breakwaters may be reflected backwards and in lateral directions, but the wave crest may also bend around the obstacle. This phenomenon can be described with refraction-diffraction models based on the Boussinesq equation or the mild-slope equation of Berkhoff. However, these models are computationally very demanding since they require a high spatial resolution. Moreover, physical phenomena such as wind generation or depth induced breaking are not readily accounted for. Inclusion of diffraction in a spectral wave model would eliminate these drawbacks. Similar to refraction the effect of diffraction can be represented as a transport of wave energy through spectral space (in the directional domain). Two ad hoc proposals are made to include diffraction in the model SWAN, which is a fully spectral model based on the action balance equation. The first proposal to describe this diffraction-induced turning rate is derived from the mild-slope equation for monochromatic, long-crested waves. It depends on the second order spatial derivative of the wave amplitude. Adding the diffraction term made the model unstable. The second proposal to describe the diffraction-induced turning rate is based on the first-order spatial gradient of the wave field. The transport of wave energy along the wave crests is proportional to the first-order derivative of the energy along the crest. The model is tested for three different cases: the academic case of monochromatic, unidirectional waves near a semi-infinite breakwater, a realistic harbour and the Bay of Viano do Castelo (Portugal). In areas with considerable wave motion the influence of diffraction is relatively unimportant. In other regions the gradientapproach for diffraction seems to give a realistic estimate for the wave field.
Hydraulic Engineering
Civil Engineering and Geosciences
Advisors/Committee Members: Holthuijsen, L.H. (mentor), Booij, N. (mentor), Battjes, J.A. (mentor).
Subjects/Keywords: wave model; SWAN; diffraction
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Doorn, N. (. (1997). Diffraction in a spectral wave model. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:995f7333-a19a-4c33-97eb-99624c101238
Chicago Manual of Style (16th Edition):
Doorn, N (author). “Diffraction in a spectral wave model.” 1997. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:995f7333-a19a-4c33-97eb-99624c101238.
MLA Handbook (7th Edition):
Doorn, N (author). “Diffraction in a spectral wave model.” 1997. Web. 04 Mar 2021.
Vancouver:
Doorn N(. Diffraction in a spectral wave model. [Internet] [Masters thesis]. Delft University of Technology; 1997. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:995f7333-a19a-4c33-97eb-99624c101238.
Council of Science Editors:
Doorn N(. Diffraction in a spectral wave model. [Masters Thesis]. Delft University of Technology; 1997. Available from: http://resolver.tudelft.nl/uuid:995f7333-a19a-4c33-97eb-99624c101238

Michigan State University
10.
Watson, Claude M.
Demonstration of Fresnel interference by means of a ripple tank.
Degree: MS, 1958, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:8293
Subjects/Keywords: Diffraction; Wave theory of light
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Watson, C. M. (1958). Demonstration of Fresnel interference by means of a ripple tank. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:8293
Chicago Manual of Style (16th Edition):
Watson, Claude M. “Demonstration of Fresnel interference by means of a ripple tank.” 1958. Masters Thesis, Michigan State University. Accessed March 04, 2021.
http://etd.lib.msu.edu/islandora/object/etd:8293.
MLA Handbook (7th Edition):
Watson, Claude M. “Demonstration of Fresnel interference by means of a ripple tank.” 1958. Web. 04 Mar 2021.
Vancouver:
Watson CM. Demonstration of Fresnel interference by means of a ripple tank. [Internet] [Masters thesis]. Michigan State University; 1958. [cited 2021 Mar 04].
Available from: http://etd.lib.msu.edu/islandora/object/etd:8293.
Council of Science Editors:
Watson CM. Demonstration of Fresnel interference by means of a ripple tank. [Masters Thesis]. Michigan State University; 1958. Available from: http://etd.lib.msu.edu/islandora/object/etd:8293

University of Arizona
11.
Quintenz, Jeffrey Paul, 1949-.
SLOTS IN A PARALLEL PLATE WAVEGUIDE
.
Degree: 1975, University of Arizona
URL: http://hdl.handle.net/10150/289321
Subjects/Keywords: Electromagnetic waves – Diffraction.;
Wave guides.
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Quintenz, Jeffrey Paul, 1. (1975). SLOTS IN A PARALLEL PLATE WAVEGUIDE
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/289321
Chicago Manual of Style (16th Edition):
Quintenz, Jeffrey Paul, 1949-. “SLOTS IN A PARALLEL PLATE WAVEGUIDE
.” 1975. Doctoral Dissertation, University of Arizona. Accessed March 04, 2021.
http://hdl.handle.net/10150/289321.
MLA Handbook (7th Edition):
Quintenz, Jeffrey Paul, 1949-. “SLOTS IN A PARALLEL PLATE WAVEGUIDE
.” 1975. Web. 04 Mar 2021.
Vancouver:
Quintenz, Jeffrey Paul 1. SLOTS IN A PARALLEL PLATE WAVEGUIDE
. [Internet] [Doctoral dissertation]. University of Arizona; 1975. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10150/289321.
Council of Science Editors:
Quintenz, Jeffrey Paul 1. SLOTS IN A PARALLEL PLATE WAVEGUIDE
. [Doctoral Dissertation]. University of Arizona; 1975. Available from: http://hdl.handle.net/10150/289321

University of Arizona
12.
Ehrlich, Jeffrey Ellis.
Nonlinear grating structures in indium antimonide waveguides.
Degree: 1989, University of Arizona
URL: http://hdl.handle.net/10150/184914
► This dissertation describes various nonlinear grating coupling phenomena in InSb waveguides. InSb exhibits an opto-thermal, diffusive nonlinearity at 9.6μm. This nonlinearity strongly modifies the growth…
(more)
▼ This dissertation describes various nonlinear grating coupling phenomena in InSb waveguides. InSb exhibits an opto-thermal, diffusive nonlinearity at 9.6μm. This nonlinearity strongly modifies the growth of a guided
wave via the grating coupling of an incident, Gaussian signal. In particular, optical limiting and bistability in the coupled power were demonstrated for a detuned grating coupler. The limits on the detunings were also investigated. The experimental results showed qualitative agreement with a theory based upon a diffusive nonlinearity in the grating coupling process. Also demonstrated and theoretically explained was a new form of "butterfly" bistability in the output coupled signal from a nonlinear waveguide. In this situation, nonlinear interference effects in the substrate modified the proportion of power outcoupled into the cover and the substrate. The effects of a thermal nonlinearity on the response of a distributed feedback grating (DFB) were also studied. The DFB reflection response of an incident guided
wave was modified either by varying the power of the incident guided
wave or that of a second guided
wave. Also, the effects of the DFB reflection were shown to enhance the bistable input grating coupling process by providing an additional feedback. This enhancement resulted in a smaller incident switching power required to obtain bistability in the input coupler.
Advisors/Committee Members: Stegeman, George (advisor), Wright, Ewan (committeemember), Burke, Jim (committeemember).
Subjects/Keywords: Diffraction gratings;
Wave guides
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ehrlich, J. E. (1989). Nonlinear grating structures in indium antimonide waveguides.
(Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/184914
Chicago Manual of Style (16th Edition):
Ehrlich, Jeffrey Ellis. “Nonlinear grating structures in indium antimonide waveguides.
” 1989. Doctoral Dissertation, University of Arizona. Accessed March 04, 2021.
http://hdl.handle.net/10150/184914.
MLA Handbook (7th Edition):
Ehrlich, Jeffrey Ellis. “Nonlinear grating structures in indium antimonide waveguides.
” 1989. Web. 04 Mar 2021.
Vancouver:
Ehrlich JE. Nonlinear grating structures in indium antimonide waveguides.
[Internet] [Doctoral dissertation]. University of Arizona; 1989. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10150/184914.
Council of Science Editors:
Ehrlich JE. Nonlinear grating structures in indium antimonide waveguides.
[Doctoral Dissertation]. University of Arizona; 1989. Available from: http://hdl.handle.net/10150/184914

University of Texas – Austin
13.
Decker, Luke Adam.
Seismic diffraction imaging methods and applications.
Degree: MSin Geological Sciences, Geological Sciences, 2014, University of Texas – Austin
URL: http://hdl.handle.net/2152/32553
► Seismic waves can either be reflected or diffracted by subsurface objects depending on the object's geometry. Diffactions can be used to determine details about the…
(more)
▼ Seismic waves can either be reflected or diffracted by subsurface objects depending on the object's geometry. Diffactions can be used to determine details about the small-scale features that generate them, such as karsts, voids, pinchouts, faults, fractures, and salt flanks.
Diffraction imaging can have resolution below the typical seismic wavelength. Scattered waves are recorded as significantly lower-energy signal than reflected waves, requiring that diffractions be separated from reflections. I describe three methods of such separation: data-domain plane-
wave destruction, Fresnel zone Elimination, and partial-image plane-
wave destruction. Once separated, diffractions can be migrated to create a seismic
diffraction image and used in velocity analysis. Common-reflection angle migrated diffractions appear flat in dip angle gathers when migrated with correct velocity. I illustrate how this property can be used to determine migration velocity through a process of oriented velocity continuation (OVC). In OVC framework
diffraction data are decomposed by slope and migrated over a range of velocities. Velocities corresponding to the flattest slope gathers are picked using semblance as a measure of flatness. This provides an estimate of migration velocity. Stacking gathers corresponding to this chosen velocity generates a seismic
diffraction image. Seismic
diffraction images provide interpreters with information about small-scale geologic objects that may not be available in conventional images. Scattering features that are interesting for exploration, like voids, caves, fractures, and faults, cause diffractions and can be resolved with better focus in
diffraction images than in conventional ones. This is particularly useful with geologically complex carbonate systems. Carbonates are strongly heterogeneous, making them difficult to image with conventional methods. Reservoir porosity is often contained within caves, or small vugs. These features are difficult to characterize with conventional methods because cave reflections have large geometric uncertainties in cave size and location. Velocity analysis of seismic reflection data in carbonates may not highlight vugular porosity particularity well. I illustrate how
diffraction images provide improved characterization by highlighting the edges of caves, thus constraining cave geometry, and highlighting more heterogenous zones by measuring the amount of scattering those zones generate.
Advisors/Committee Members: Fomel, Sergey B. (advisor), Ren, Kui (committee member), Wilson, Clark (committee member).
Subjects/Keywords: Seismic; Diffraction; Imaging; Plane-wave; Velocity; Seismic interpretation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Decker, L. A. (2014). Seismic diffraction imaging methods and applications. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/32553
Chicago Manual of Style (16th Edition):
Decker, Luke Adam. “Seismic diffraction imaging methods and applications.” 2014. Masters Thesis, University of Texas – Austin. Accessed March 04, 2021.
http://hdl.handle.net/2152/32553.
MLA Handbook (7th Edition):
Decker, Luke Adam. “Seismic diffraction imaging methods and applications.” 2014. Web. 04 Mar 2021.
Vancouver:
Decker LA. Seismic diffraction imaging methods and applications. [Internet] [Masters thesis]. University of Texas – Austin; 2014. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2152/32553.
Council of Science Editors:
Decker LA. Seismic diffraction imaging methods and applications. [Masters Thesis]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/32553

The Ohio State University
14.
Mikuteit, Siegfried.
Mutual coupling in a three-element, parallel-plate waveguide
array by wedge diffraction and surface integration techniques
.
Degree: PhD, Graduate School, 1967, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1486643980688137
Subjects/Keywords: Engineering; Wave guides; Diffraction
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mikuteit, S. (1967). Mutual coupling in a three-element, parallel-plate waveguide
array by wedge diffraction and surface integration techniques
. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1486643980688137
Chicago Manual of Style (16th Edition):
Mikuteit, Siegfried. “Mutual coupling in a three-element, parallel-plate waveguide
array by wedge diffraction and surface integration techniques
.” 1967. Doctoral Dissertation, The Ohio State University. Accessed March 04, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1486643980688137.
MLA Handbook (7th Edition):
Mikuteit, Siegfried. “Mutual coupling in a three-element, parallel-plate waveguide
array by wedge diffraction and surface integration techniques
.” 1967. Web. 04 Mar 2021.
Vancouver:
Mikuteit S. Mutual coupling in a three-element, parallel-plate waveguide
array by wedge diffraction and surface integration techniques
. [Internet] [Doctoral dissertation]. The Ohio State University; 1967. [cited 2021 Mar 04].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1486643980688137.
Council of Science Editors:
Mikuteit S. Mutual coupling in a three-element, parallel-plate waveguide
array by wedge diffraction and surface integration techniques
. [Doctoral Dissertation]. The Ohio State University; 1967. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1486643980688137

The Ohio State University
15.
Balanis, Constantine A.
Radiation from slots on cylindrical bodies using geometrical
theory of diffraction and creeping wave theory.
Degree: PhD, Graduate School, 1969, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1486651333550034
Subjects/Keywords: Engineering; Radiation; Diffraction; Wave-motion
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Balanis, C. A. (1969). Radiation from slots on cylindrical bodies using geometrical
theory of diffraction and creeping wave theory. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1486651333550034
Chicago Manual of Style (16th Edition):
Balanis, Constantine A. “Radiation from slots on cylindrical bodies using geometrical
theory of diffraction and creeping wave theory.” 1969. Doctoral Dissertation, The Ohio State University. Accessed March 04, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1486651333550034.
MLA Handbook (7th Edition):
Balanis, Constantine A. “Radiation from slots on cylindrical bodies using geometrical
theory of diffraction and creeping wave theory.” 1969. Web. 04 Mar 2021.
Vancouver:
Balanis CA. Radiation from slots on cylindrical bodies using geometrical
theory of diffraction and creeping wave theory. [Internet] [Doctoral dissertation]. The Ohio State University; 1969. [cited 2021 Mar 04].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1486651333550034.
Council of Science Editors:
Balanis CA. Radiation from slots on cylindrical bodies using geometrical
theory of diffraction and creeping wave theory. [Doctoral Dissertation]. The Ohio State University; 1969. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1486651333550034
16.
Bellec, Ewen.
Study of charge density wave materials under current by X-ray diffraction : Étude de matériaux onde de densité de charge sous courant par diffraction de rayons X.
Degree: Docteur es, Physique, 2019, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2019SACLS437
► Ce manuscrit a pour sujet principal la diffraction par rayons X des matériaux ondes de densité de charges (ODC). Nous avons étudié le cristal quasi-1D…
(more)
▼ Ce manuscrit a pour sujet principal la diffraction par rayons X des matériaux ondes de densité de charges (ODC). Nous avons étudié le cristal quasi-1D NbSe3 ainsi que le quasi-2D TbTe3. Plusieurs grands instruments ont été utilisés pour cette étude, le synchrotron ESRF de Grenoble sur la ligne ID01 ainsi que le laser à électron libre LCLS à Stanford. Premièrement, grâce à la cohérence du faisceau X à LCLS, nous avons pu observer une perte de cohérence transverse dans NbSe3 lors de l’application d’un courant électrique au-dessus d’un certain seuil ainsi qu’une compression longitudinale de l’ODC. Ensuite, à l’ESRF, nous avons utilisé un faisceau X focalisé au micromètre par une Fresnel zone plate pour scanner l’ODC localement par diffraction sur NbSe3 puis ensuite sur TbTe3. Lorsqu’un courant est appliqué sur l’échantillon, nous avons observé une déformation transverse indiquant que l’ODC est bloquée au niveau de la surface de l’échantillon dans NbSe3. Dans le cas de TbTe3, l’ODC tourne sous courant présentant un cycle d’hystérésis lorsque le courant passe continument de positif à négatif. Nous avons aussi pu constater dans plusieurs régions, toujours pour TbTe3, la création de défauts d’irradiation localisés induisant une compression-dilatation de l’ODC. Dans une dernière partie théorique, nous montrons comment la théorie du transport électrique de l’ODC par un train de solitons portants chacun une charge ainsi que la prise en compte du blocage de l’ODC sur la surface de l’échantillon que nous avons vu expérimentalement permet de comprendre plusieurs mesures de résistivité en fonction des dimensions de l’échantillon trouvées dans la littérature. Nous présentons ensuite plusieurs idées pour expliquer du blocage de l’ODC sur les surfaces au niveau microscopique et proposons l’hypothèse d’une ODC commensurable en surface (et incommensurable dans le volume).
The main subject of this manuscript is the X-ray diffraction of charge density wave (CDW) materials. We studied the quasi-1D NbSe3 crystal and the quasi-2D TbTe3. Several large instruments facilities were used for this study, the ESRF synchrotron in Grenoble on the ID01 line and the LCLS free electron laser in Stanford. First, thanks to the coherence of the X-beam at LCLS, we were able to observe a loss of transverse coherence in NbSe3 when applying an electrical current above a certain threshold as well as a longitudinal compression of the CDW. Then, at the ESRF, we used an X-ray beam focused on the micrometer scale by a Fresnel zone plate to scan the CDW locally by diffraction on NbSe3 and on TbTe3. When a current is applied to the sample, we observed a transverse deformation indicating that the CDW is pinned on the sample surface in NbSe3. In the case of TbTe3, the CDW rotates under current showing a hysteresis cycle when one is continuously changing from positive to negative current. We have also observed in several regions, in TbTe3, the creation of localized irradiation defects inducing a compression-dilation of the CDW. In a last theoretical part, we show…
Advisors/Committee Members: Le Bolloc'h, David (thesis director).
Subjects/Keywords: Onde de densité de charge; Incommensurable; Diffraction; Rayons X; Micro-diffraction; Soliton; Charge density wave; Incommensurate; Diffraction; X-ray; Micro-diffraction; Soliton; 530
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bellec, E. (2019). Study of charge density wave materials under current by X-ray diffraction : Étude de matériaux onde de densité de charge sous courant par diffraction de rayons X. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2019SACLS437
Chicago Manual of Style (16th Edition):
Bellec, Ewen. “Study of charge density wave materials under current by X-ray diffraction : Étude de matériaux onde de densité de charge sous courant par diffraction de rayons X.” 2019. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed March 04, 2021.
http://www.theses.fr/2019SACLS437.
MLA Handbook (7th Edition):
Bellec, Ewen. “Study of charge density wave materials under current by X-ray diffraction : Étude de matériaux onde de densité de charge sous courant par diffraction de rayons X.” 2019. Web. 04 Mar 2021.
Vancouver:
Bellec E. Study of charge density wave materials under current by X-ray diffraction : Étude de matériaux onde de densité de charge sous courant par diffraction de rayons X. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2019. [cited 2021 Mar 04].
Available from: http://www.theses.fr/2019SACLS437.
Council of Science Editors:
Bellec E. Study of charge density wave materials under current by X-ray diffraction : Étude de matériaux onde de densité de charge sous courant par diffraction de rayons X. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2019. Available from: http://www.theses.fr/2019SACLS437

UCLA
17.
Li, Xiaoqiang.
New resonances, gratings, and slow-wave structures based on 2D periodic structures.
Degree: Electrical Engineering, 2018, UCLA
URL: http://www.escholarship.org/uc/item/67m263v1
► Periodic structure is made of a finite or infinite repetition of a unit cell in one, two or three dimensions. It has been intensively investigated…
(more)
▼ Periodic structure is made of a finite or infinite repetition of a unit cell in one, two or three dimensions. It has been intensively investigated in electromagnetics and widely used in metamaterials, metasurfaces, photonic crystals, frequency selective surfaces (FSS), slow-wave structures, diffraction gratings, etc. Metamaterials and metasurfaces are subsets of periodic structures whose unit cell is much smaller than the wavelength. By proper design of the sub-wavelength unit cell of a periodic structure, its macro properties can be engineered as we wish. This dissertation introduces three novel devices/phenomena which are based on 2D metamaterials/metasurfaces. This dissertation has three sections.In section I, a new resonance phenomenon is demonstrated in waveguide cavities, which simultaneously uses two orthogonal modes (polarizations). This resonance is formed by bouncing waves with similar handedness, between two simple anisotropic metasurfaces having a relative rotation angle. The tilted anisotropic metasurfaces can cross-couple the waves from one polarization to the other at the cavity end. The field profile of the resonant mode does not exhibit nodes and antinodes, thus the resonant frequency is not solely determined by the cavity length. The resonance condition is theoretically demonstrated from both field and transmission-line perspectives, and is validated by simulations showing the existence of the new resonance. The concept is experimentally demonstrated in an X-band dual-mode circular waveguide, demonstrating a very short cavity resonance. The concept brings new possibilities for resonator design with size and tunability benefits at different frequencies.In section II, a metasurface diffraction grating for circularly polarized (CP) incident wave operating at 10 GHz is introduced. Such structure can provide strong auto-collimation for the CP incident wave. Unlike the conventional scatterer, which would typically reverse the handedness of the incident CP wave upon reflection, the proposed grating can preserve the handedness. strong auto-collimation blazing effect and handedness preservation are achieved with specially designed reactive impedance surface, which allows independent control of the responses to transverse electric (TE) and transverse magnetic (TM) polarization. Simulation and measurement are carried out to demonstrate such effect, and comparison with conventional sawtooth grating is made.In section III, a novel slow-wave substrate integrated waveguide (SIW) is proposed and investigated. The slow-wave effect is achieved by the enhanced capacitance between the signal trace grid and periodic grounded patches on the same top layer. Such slow-wave effect can provide more than 40% size reduction in lateral dimension compared with the conventional SIW with the same cutoff frequency. Meanwhile, the longitudinal dimension can also be reduced by more than 40%. Two-pole bandpass filters (BPF) built from conventional SIW and proposed slow-wave SIW (SW-SIW) are compared through simulations and…
Subjects/Keywords: Electrical engineering; Electromagnetics; Diffraction Grating; Filter; Metasurface; Polarization Standing Wave; Slow-wave Structure; Substrate Integrated Waveguide
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, X. (2018). New resonances, gratings, and slow-wave structures based on 2D periodic structures. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/67m263v1
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):
Li, Xiaoqiang. “New resonances, gratings, and slow-wave structures based on 2D periodic structures.” 2018. Thesis, UCLA. Accessed March 04, 2021.
http://www.escholarship.org/uc/item/67m263v1.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Xiaoqiang. “New resonances, gratings, and slow-wave structures based on 2D periodic structures.” 2018. Web. 04 Mar 2021.
Vancouver:
Li X. New resonances, gratings, and slow-wave structures based on 2D periodic structures. [Internet] [Thesis]. UCLA; 2018. [cited 2021 Mar 04].
Available from: http://www.escholarship.org/uc/item/67m263v1.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li X. New resonances, gratings, and slow-wave structures based on 2D periodic structures. [Thesis]. UCLA; 2018. Available from: http://www.escholarship.org/uc/item/67m263v1
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Canterbury
18.
Eisazadeh Moghaddam, Arash.
Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay.
Degree: PhD, Geography, 2015, University of Canterbury
URL: http://dx.doi.org/10.26021/7795
► Confined coasts in general, and pocket beach environments in particular, are under huge development pressures worldwide, not least due to their sheltered nature and perceived…
(more)
▼ Confined coasts in general, and pocket beach environments in particular, are under huge development pressures worldwide, not least due to their sheltered nature and perceived shoreline stability. However, understanding of their physical functioning is poor in comparison to that of open coast beaches. This study aims to improve understanding in terms of the existing gaps in knowledge of wave processes and nearshore currents, and also to examine the importance of local wind and tide factors in generating nearshore currents, in micro-tidal pocket beaches. The boundaries of embayments are generally recognized as important controls of their beach processes and responses, yet little detailed knowledge exists of how the exact embayment dimensions and characteristics influences these processes. One key embayment feature the influence of which is poorly understood is the downcoast headland. In this thesis, field observations plus Zanuttigh and Van der Meer’s (2008) approach, and the SWAN wave model were used to evaluate the downcoast headland effects on wave processes within Okains Bay, an example pocket beach environment. The results showed that incident wave heights and directions were significantly influenced by wave reflection processes from the downcoast headland inside the bay. The intensity of reflection effects on wave characteristics inside the pocket beach varied according to approaching wave direction. Reflection effects reduced when waves approached from angles close to parallel to the headlands, increasing towards headland-perpendicular wave approaches.
Field observations and the XBeach model were used to examine whether or not tides can significantly influence nearshore currents within example and model pocket beach environments. Results indicated that tides can be the primary driver of nearshore currents close to the bed inside micro-tidal pocket beaches, depending on incident wave conditions. In areas of micro-tidal pocket beaches exposed to direct approaching waves, currents were wave driven, while in areas further into the bay that experienced headland filtering of their wave environment, currents were mainly tide generated.
The results of this study demonstrated how the current circulation system within micro-tidal pocket beaches is related to the incoming directions of offshore waves. If high energy waves approach oblique or normal to the shoreline (with the assumption that the shoreline is at 90° to the headlands), the current system was found to consist of longshore currents influenced by headlands, plus a rip current in the center of the shoreline or a toporip in proximity to headlands. The location of the rip current or toporip was determined by the direction of approaching incident waves.
This study also examined the behavior of local winds in a pocket beach environment and their consequent effects on nearshore currents. Results for Okains Bay show that local winds tended to blow in offshore and onshore directions, as the bay is located in a valley, so orographic effects channel and shift the…
Subjects/Keywords: Pocket beach; Reflection; Diffraction; Downcoast headland; Upcoast headland; Wave height; Wave direction; Current systems; Tides; Local winds
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Eisazadeh Moghaddam, A. (2015). Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay. (Doctoral Dissertation). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/7795
Chicago Manual of Style (16th Edition):
Eisazadeh Moghaddam, Arash. “Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay.” 2015. Doctoral Dissertation, University of Canterbury. Accessed March 04, 2021.
http://dx.doi.org/10.26021/7795.
MLA Handbook (7th Edition):
Eisazadeh Moghaddam, Arash. “Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay.” 2015. Web. 04 Mar 2021.
Vancouver:
Eisazadeh Moghaddam A. Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay. [Internet] [Doctoral dissertation]. University of Canterbury; 2015. [cited 2021 Mar 04].
Available from: http://dx.doi.org/10.26021/7795.
Council of Science Editors:
Eisazadeh Moghaddam A. Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay. [Doctoral Dissertation]. University of Canterbury; 2015. Available from: http://dx.doi.org/10.26021/7795
19.
Nsengiyumva, Florence.
Contribution à la détection d’objets sur pistes d’aéroport (FOD) par tomographie millimétrique en bande W et polarimétrie : Contribution to the detection of foreign objects debris (FODs) on airport runways using millimeter wave tomography in W band and polarimetry.
Degree: Docteur es, Électronique, 2016, Nice
URL: http://www.theses.fr/2016NICE4041
► Les radars millimétriques en bande W (75-110 GHz) sont en plein essor, grâce notamment aux progrès des circuits intégrés, permettant de réaliser des systèmes compacts…
(more)
▼ Les radars millimétriques en bande W (75-110 GHz) sont en plein essor, grâce notamment aux progrès des circuits intégrés, permettant de réaliser des systèmes compacts à bas coût et haute résolution due à la courte longueur d’onde. Dans un premier temps, ces systèmes ont été utilisés à des fins de détection et de localisation, avec à terme, pour objectif l’identification. Ainsi, des systèmes d’imagerie radar ont été développés, notamment grâce à l’imagerie qualitative, basée par exemple sur l’imagerie radar par synthèse d’ouverture (SAR). Cependant, afin de reconstruire les propriétés électromagnétiques des objets pour une identification complète, il est nécessaire de développer des algorithmes de reconstruction quantitatifs. Le travail présenté dans ce manuscrit est de poser les bases d’un système d’imagerie qualitative et quantitative en gamme millimétrique pour la détection et l’identification des objets sur les pistes d’aéroport par tomographie, tenant compte de la polarisation de l’onde incidente. Au cours de cette thèse, un outil de simulation permettant de la résolution des problèmes direct et inverse, pour les deux types de polarisation à deux dimensions 2D-TE et 2D-TM, basé sur la méthode des moments (MoM) a été développé. La première étape a consisté en la validation du problème direct en effectuant des comparaisons numériques avec des solutions analytiques pour des cibles canoniques. Ensuite, des mesures expérimentales ont été effectuées et comparées aux résultats numériques. Enfin, les résultats des reconstructions obtenus ont permis de valider l’algorithme de reconstruction 2D développé pour l’imagerie quantitative.
Millimeter-wave radar systems in W-band (75-110 GHz) are booming, due to advances in integrated circuits, allowing the fabrication of low-cost and high-resolution compact systems, thanks to the short wavelength. First, these systems were used for detecting and localizing purposes, with the aim of identification. Thus, imaging radar systems have been developed, especially using qualitative imaging, based for example, on Synthetic Aperture Radar (SAR). Nevertheless, in order to reconstruct the electromagnetic properties of objects, for a complete identification, we must develop quantitative reconstruction algorithms. The work presented in this manuscript is to give the basis of a qualitative and quantitative millimeter wave imaging system for detecting and identifying foreign debris on airport runways using tomography, taking into account the polarization of the incident wave. In this thesis, a simulation tool for solving forward and inverse problems, for the two-dimensional polarization cases 2D-TM and 2D-TE, based on the method of moments (MoM) has been developed. The first step was to study the validation of the direct problem by comparing numerical results with analytical solutions for canonical targets. Then, experimental measurements have ben carried out and compared with numerical results. Finally, reconstruction results obtained have validated the reconstruction algorithm developed…
Advisors/Committee Members: Pichot, Christian (thesis director).
Subjects/Keywords: Diffraction électromagnétique; Imagerie millimétrique; Diffraction inverse; Mesure de champ électrique en bande W; Electromagnetic scattering; Millimeter-wave imaging; Inverse scattering; Millimeter wave measurements in W-band
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nsengiyumva, F. (2016). Contribution à la détection d’objets sur pistes d’aéroport (FOD) par tomographie millimétrique en bande W et polarimétrie : Contribution to the detection of foreign objects debris (FODs) on airport runways using millimeter wave tomography in W band and polarimetry. (Doctoral Dissertation). Nice. Retrieved from http://www.theses.fr/2016NICE4041
Chicago Manual of Style (16th Edition):
Nsengiyumva, Florence. “Contribution à la détection d’objets sur pistes d’aéroport (FOD) par tomographie millimétrique en bande W et polarimétrie : Contribution to the detection of foreign objects debris (FODs) on airport runways using millimeter wave tomography in W band and polarimetry.” 2016. Doctoral Dissertation, Nice. Accessed March 04, 2021.
http://www.theses.fr/2016NICE4041.
MLA Handbook (7th Edition):
Nsengiyumva, Florence. “Contribution à la détection d’objets sur pistes d’aéroport (FOD) par tomographie millimétrique en bande W et polarimétrie : Contribution to the detection of foreign objects debris (FODs) on airport runways using millimeter wave tomography in W band and polarimetry.” 2016. Web. 04 Mar 2021.
Vancouver:
Nsengiyumva F. Contribution à la détection d’objets sur pistes d’aéroport (FOD) par tomographie millimétrique en bande W et polarimétrie : Contribution to the detection of foreign objects debris (FODs) on airport runways using millimeter wave tomography in W band and polarimetry. [Internet] [Doctoral dissertation]. Nice; 2016. [cited 2021 Mar 04].
Available from: http://www.theses.fr/2016NICE4041.
Council of Science Editors:
Nsengiyumva F. Contribution à la détection d’objets sur pistes d’aéroport (FOD) par tomographie millimétrique en bande W et polarimétrie : Contribution to the detection of foreign objects debris (FODs) on airport runways using millimeter wave tomography in W band and polarimetry. [Doctoral Dissertation]. Nice; 2016. Available from: http://www.theses.fr/2016NICE4041

NSYSU
20.
Chen, Ching-Yuan.
Pressure and doping effects on the anomalous phase transition in ternary superconductor Bi2Rh3Se2.
Degree: Master, Physics, 2012, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723112-165505
► Bi2Rh3Se2 have been known as a charge-density-wave (CDW) superconductor, where the superconducting critical temperature Tc and the CDW phase transition are about 0.7 K and…
(more)
▼ Bi2Rh3Se2 have been known as a charge-density-
wave (CDW) superconductor, where the superconducting critical temperature Tc and the CDW phase transition are about 0.7 K and 250 K, respectively. Since there has no definite proof that the anomaly at around 250 K comes from charge-density-
wave, we wished to provide another evidence to study whether the superconductor had the properties of CDW by electric resistivity measurements applied different pressures. Bi2Rh3Se2 was prepared by using the solid state reaction method and heating in the quartz tube. After the sample was synthesized, the quality was identified by XRD, MPMS, and specific heat probe. With the confirmation of the above-mentioned measurements, we can determine the sampleâs quality is good. Furthermore, temperature-dependent resistivity (2-340 K) under pressure (up to 22.23 kbar) on the ternary superconductor Bi2Rh3Se2 are
performed to study the possible coexistence of CDW and superconductivity. Interestingly, the resistive anomaly occurred at Ts~250 K, is shifted to higher temperature with increasing pressure. This experimental finding is not consistent with a traditional CDW transition. Moreover, the temperature-dependent Transmission Electron Microscopy (TEM) electron
diffraction is evident a structural phase transition from space group âC1 2/m 1â (Ts > 250 K) to âP1 2/m 1â (Ts < 250 K). Finally, We do the Co doping to make sure the effects of chemical pressure on this phase transition. The results are opposite to imposed by physical pressure that the transition is shift to lower temperature with more Co inside the sample.
Advisors/Committee Members: J.-Y. Lin (chair), H. Chou (chair), H. D. Yang (committee member), J. L. Her (chair).
Subjects/Keywords: superconductivity; charge-density-wave; structural transition; Bi2Rh3Se2; pressure effect; doping effect; selected area electron diffraction
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, C. (2012). Pressure and doping effects on the anomalous phase transition in ternary superconductor Bi2Rh3Se2. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723112-165505
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):
Chen, Ching-Yuan. “Pressure and doping effects on the anomalous phase transition in ternary superconductor Bi2Rh3Se2.” 2012. Thesis, NSYSU. Accessed March 04, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723112-165505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Ching-Yuan. “Pressure and doping effects on the anomalous phase transition in ternary superconductor Bi2Rh3Se2.” 2012. Web. 04 Mar 2021.
Vancouver:
Chen C. Pressure and doping effects on the anomalous phase transition in ternary superconductor Bi2Rh3Se2. [Internet] [Thesis]. NSYSU; 2012. [cited 2021 Mar 04].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723112-165505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen C. Pressure and doping effects on the anomalous phase transition in ternary superconductor Bi2Rh3Se2. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723112-165505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Alzaix, Benjamin.
Mathematical and numerical analysis of the Herberthson integral equation dedicated to electromagnetic plane wave scattering : Analyse mathématique et numérique de l’équation intégrale de Herberthson dédié à la diffraction d’ondes planes.
Degree: Docteur es, Mathematiques appliquees et calcul scientifique, 2017, Bordeaux
URL: http://www.theses.fr/2017BORD0578
► Cette thèse porte sur la diffraction d’une onde plane électromagnétique par une surface lisse parfaitement conductrice (PEC). Elle présente l’analyse des propriétés d’une nouvelle formulation…
(more)
▼ Cette thèse porte sur la diffraction d’une onde plane électromagnétique par une surface lisse parfaitement conductrice (PEC). Elle présente l’analyse des propriétés d’une nouvelle formulation des trois principales équations intégrales de frontières de la théorie de la diffraction électromagnétique (EFIE, MFIE et CFIE). L’idée est d’adapter les équations intégrales conventionnelles à la diffraction d’une onde plane en supposant que la fonction de phase de l’onde plane incidente détermine la fonction de phase de la distribution de courant induit sur la surface.L’idée d’utiliser la phase dans la diffraction d’ondes planes a déjà été étudiée pour les hautes fréquences, notamment dans les thèses de Zhou (1995) et Darrigrand (2002) qui adaptèrent les espaces d’approximation des éléments finis. Dans cette thèse, cependant, nous suivons une formulation plus récente, donnée par Herberthson (2008), où la fonction de phase est incorporée dans la distribution du noyau des opérateurs intégraux.En présentant les versions modifiées de l’EFIE et de la MFIE (dénommées HEFIE et HMFIE)dans des espaces fonctionnels appropriés, nous prouvons ici l’existence d’une solution unique à cette formulation spécifique et présentons une mise en oeuvre pratique originale qui tire parti de l’expérience acquise sur l’EFIE/MFIE. Par la suite, nous explorons une propriété importante offerte par ces nouvelles formulations: la possibilité de réduire le nombre de degrés de liberté requis pour obtenir une solution précise du problème.
This thesis is about the scattering of an electromagnetic plane wave incidenton a perfectly conducting smooth surface. It presents the analysis of the properties of a newformulation of the three principal boundary integral equations of electromagnetic scattering theory(EFIE, MFIE and CFIE). The basic idea is to adapt the conventional integral equations toplane-wave scattering by supposing that the phase function of an incident plane wave determinesthe phase function of the induced boundary current distribution.This idea of using the phase in plane wave scattering has previously been studied in highfrequencyscattering, in particular in the theses by Zhou (1995) and Darrigrand (2002) whoadapt the finite element approximation spaces. In this thesis, though, we follow a more recentformulation, given by Herberthson (2008), where the phase function is incorporated in the kerneldistribution of the integral operators.Presenting the modified version of the EFIE and the MFIE (denoted HEFIE and HMFIE) inappropriate function spaces, we prove the existence of a unique solution to this specific formulationand developp an original practical implementation which takes advantage of the gainedexperience on the EFIE/MFIE. Then, we explore another important property provided by thenew formulations: the possibility to reduce the number of degrees of freedom required to get anaccurate solution of the problem.
Advisors/Committee Members: Giraud, Luc (thesis director), Poirier, Jean-René (thesis director).
Subjects/Keywords: Diffraction électromagnétique; Equation intégrale de frontières; Onde planes; Electromagnetic scattering; Boundary integral equation; Plane wave
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Alzaix, B. (2017). Mathematical and numerical analysis of the Herberthson integral equation dedicated to electromagnetic plane wave scattering : Analyse mathématique et numérique de l’équation intégrale de Herberthson dédié à la diffraction d’ondes planes. (Doctoral Dissertation). Bordeaux. Retrieved from http://www.theses.fr/2017BORD0578
Chicago Manual of Style (16th Edition):
Alzaix, Benjamin. “Mathematical and numerical analysis of the Herberthson integral equation dedicated to electromagnetic plane wave scattering : Analyse mathématique et numérique de l’équation intégrale de Herberthson dédié à la diffraction d’ondes planes.” 2017. Doctoral Dissertation, Bordeaux. Accessed March 04, 2021.
http://www.theses.fr/2017BORD0578.
MLA Handbook (7th Edition):
Alzaix, Benjamin. “Mathematical and numerical analysis of the Herberthson integral equation dedicated to electromagnetic plane wave scattering : Analyse mathématique et numérique de l’équation intégrale de Herberthson dédié à la diffraction d’ondes planes.” 2017. Web. 04 Mar 2021.
Vancouver:
Alzaix B. Mathematical and numerical analysis of the Herberthson integral equation dedicated to electromagnetic plane wave scattering : Analyse mathématique et numérique de l’équation intégrale de Herberthson dédié à la diffraction d’ondes planes. [Internet] [Doctoral dissertation]. Bordeaux; 2017. [cited 2021 Mar 04].
Available from: http://www.theses.fr/2017BORD0578.
Council of Science Editors:
Alzaix B. Mathematical and numerical analysis of the Herberthson integral equation dedicated to electromagnetic plane wave scattering : Analyse mathématique et numérique de l’équation intégrale de Herberthson dédié à la diffraction d’ondes planes. [Doctoral Dissertation]. Bordeaux; 2017. Available from: http://www.theses.fr/2017BORD0578

University of Manchester
22.
Nethercote, Matthew Allan.
Effective analytic and asymptotic procedures for wave
diffraction by perfect and penetrable wedges.
Degree: 2019, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322242
► In this thesis, various canonical problems of plane wave diffraction by infinite two-dimensional wedges are studied in both acoustic and electromagnetic physical settings. The thesis…
(more)
▼ In this thesis, various canonical problems of plane
wave diffraction by infinite two-dimensional wedges are studied in
both acoustic and electromagnetic physical settings. The thesis is
divided into two main parts. The first, which is essentially an
extensive review of extant methods, focuses on wedge
diffraction
with homogeneous Dirichlet or Neumann boundary conditions. It
involves studying the well-known solution to Sommerfeld's
half-plane
diffraction problem and provides an extensive review of
the literature on the perfect wedge problem, including analytic
methods such as the Sommerfeld-Malyuzhinets and Wiener-Hopf
techniques, as well as asymptotic techniques such as Keller's
geometrical theory of
diffraction. The second part of the thesis is
dedicated to the problem of
diffraction by a penetrable wedge. To
this day, there is no clear analytical solution to this important
canonical problem, but there have been numerous attempts at
computational and asymptotic solutions by many reputable authors
using extensions of techniques applied to perfect wedge
diffraction. Because it is penetrable, the material properties
between the wedge scatterer and the exterior host differ. It is
hence possible to define the so-called contrast parameter as the
ratio of specific material properties (depending on the physical
context) between the host and the scatterer. Throughout the thesis,
this parameter is considered to be small and the contrast is said
to be high. This assumption allows construction of an asymptotic
iterative scheme, which enables the penetrable wedge problem to be
written as an infinite sequence of impenetrable wedge problems. All
but the first of these impenetrable wedge problems are solved using
a combination of the Sommerfeld-Malyuzhinets and Wiener-Hopf
techniques. The result is a sequence of complex nested integrals
which are evaluated using a subtle interplay of interpolation,
asymptotic expansions and advanced complex analysis. For several
test cases, including those illustrated in this thesis (that were
chosen for mathematical convenience and consistency with the
literature), the numerical results were in good agreement with
alternative approaches.
Advisors/Committee Members: ABRAHAMS, DAVID ID, Assier, Raphael, Abrahams, David.
Subjects/Keywords: Wave diffraction; Perfect (Impenetrable) wedge; Penetrable wedge; Sommerfeld-Malyuzhinets technique; Wiener-Hopf technique
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nethercote, M. A. (2019). Effective analytic and asymptotic procedures for wave
diffraction by perfect and penetrable wedges. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322242
Chicago Manual of Style (16th Edition):
Nethercote, Matthew Allan. “Effective analytic and asymptotic procedures for wave
diffraction by perfect and penetrable wedges.” 2019. Doctoral Dissertation, University of Manchester. Accessed March 04, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322242.
MLA Handbook (7th Edition):
Nethercote, Matthew Allan. “Effective analytic and asymptotic procedures for wave
diffraction by perfect and penetrable wedges.” 2019. Web. 04 Mar 2021.
Vancouver:
Nethercote MA. Effective analytic and asymptotic procedures for wave
diffraction by perfect and penetrable wedges. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Mar 04].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322242.
Council of Science Editors:
Nethercote MA. Effective analytic and asymptotic procedures for wave
diffraction by perfect and penetrable wedges. [Doctoral Dissertation]. University of Manchester; 2019. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322242

University of Adelaide
23.
Pudipeddi, Gnana Teja.
Quantitative Structural Diagnosis of Plate-like Structures using Multi-frequency Lamb Wave Diffraction Tomography.
Degree: 2019, University of Adelaide
URL: http://hdl.handle.net/2440/123403
► Quantitative identification and evaluation of damage are of utmost importance for the safety and sustainability of a structure. Identifying early stage damage is also necessary…
(more)
▼ Quantitative identification and evaluation of damage are of utmost importance for the safety and sustainability of a structure. Identifying early stage damage is also necessary for reducing the maintenance and repair costs of a structure and increasing its service life. Numerous Structural Health Monitoring (SHM) systems have been developed over time to address these issues in various capacities and prevent huge losses to life and economy. Lamb
Wave Diffraction Tomography (LWDT) is an advanced SHM process that is used for identifying the location and quantifying the severity of damage. The process consists of interrogating a region of probable damage with Lamb waves and gathering information about the presence and geometry of the damage from the scattered waves. This process can be used in plate-like structures, such as metallic plates and composite laminates. One of the main areas of research in LWDT is investigating the effects of multiple non-central frequency components of data on the image quality and utilizing information from these multiple frequencies to reconstruct the damage. This thesis contains journal papers that 1) study the scattering of Lamb waves at delaminations within a composite laminate, focussing on the mode-conversion effect at the damage boundary 2) study the effects of non-central frequencies on the quality of imaging for damage reconstruction and 3) propose multi-frequency approaches that improve the efficiency of LWDT. The key outcome of this study is that a multi-frequency approach to damage reconstruction greatly improves the resolution of damage in plate-like structures, without increasing the number of transducers. A multi-frequency based reconstruction approach would thus lead to the advancement of LWDT as a feasible technique for the SHM of plate-like structures.
Advisors/Committee Members: Ng, Ching-Tai (advisor), Kotousov, Andrei (advisor), School of Civil, Environmental and Mining Engineering (school).
Subjects/Keywords: Lamb wave; diffraction tomography; imaging; multifrequency; damage identification; structural health monitoring; scattering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pudipeddi, G. T. (2019). Quantitative Structural Diagnosis of Plate-like Structures using Multi-frequency Lamb Wave Diffraction Tomography. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/123403
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):
Pudipeddi, Gnana Teja. “Quantitative Structural Diagnosis of Plate-like Structures using Multi-frequency Lamb Wave Diffraction Tomography.” 2019. Thesis, University of Adelaide. Accessed March 04, 2021.
http://hdl.handle.net/2440/123403.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pudipeddi, Gnana Teja. “Quantitative Structural Diagnosis of Plate-like Structures using Multi-frequency Lamb Wave Diffraction Tomography.” 2019. Web. 04 Mar 2021.
Vancouver:
Pudipeddi GT. Quantitative Structural Diagnosis of Plate-like Structures using Multi-frequency Lamb Wave Diffraction Tomography. [Internet] [Thesis]. University of Adelaide; 2019. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2440/123403.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pudipeddi GT. Quantitative Structural Diagnosis of Plate-like Structures using Multi-frequency Lamb Wave Diffraction Tomography. [Thesis]. University of Adelaide; 2019. Available from: http://hdl.handle.net/2440/123403
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida
24.
Youn, Wooram.
Light Extraction of Organic Light-Emitting Diodes Using Corrugated Structure.
Degree: PhD, Materials Science and Engineering, 2015, University of Florida
URL: https://ufdc.ufl.edu/UFE0047775
► Light extraction is critical to the efficiency of organic light-emitting diodes (OLEDs). Because of the internal reflection, only 20~30% of generated light in OLEDs is…
(more)
▼ Light extraction is critical to the efficiency of organic light-emitting diodes (OLEDs). Because of the internal reflection, only 20~30% of generated light in OLEDs is emitted across the top interface and detected by observers. The balance is controlled by the refractive indices of each side of the interface and the angle at which light is incident upon the interface. In particularly, the generated light in OLEDs is dominated by three different modes: air mode, substrate mode, waveguide mode because of the presence of two interfaces of air (n=1)-substrate (n=1.52) and substrate (n=1.52)/indium tin oxide (ITO) (n=1.8).
Advisors/Committee Members: SO,FRANKY FAT KEI (committee chair), HOLLOWAY,PAUL H (committee member), NORTON,DAVID P (committee member), RINZLER,ANDREW GABRIEL (committee member).
Subjects/Keywords: Antinodes; Electrons; Light refraction; Periodicity; Photonics; Quantum efficiency; Sapphire; Wave diffraction; Waveguides; Wavelengths; extraction – light
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APA (6th Edition):
Youn, W. (2015). Light Extraction of Organic Light-Emitting Diodes Using Corrugated Structure. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0047775
Chicago Manual of Style (16th Edition):
Youn, Wooram. “Light Extraction of Organic Light-Emitting Diodes Using Corrugated Structure.” 2015. Doctoral Dissertation, University of Florida. Accessed March 04, 2021.
https://ufdc.ufl.edu/UFE0047775.
MLA Handbook (7th Edition):
Youn, Wooram. “Light Extraction of Organic Light-Emitting Diodes Using Corrugated Structure.” 2015. Web. 04 Mar 2021.
Vancouver:
Youn W. Light Extraction of Organic Light-Emitting Diodes Using Corrugated Structure. [Internet] [Doctoral dissertation]. University of Florida; 2015. [cited 2021 Mar 04].
Available from: https://ufdc.ufl.edu/UFE0047775.
Council of Science Editors:
Youn W. Light Extraction of Organic Light-Emitting Diodes Using Corrugated Structure. [Doctoral Dissertation]. University of Florida; 2015. Available from: https://ufdc.ufl.edu/UFE0047775

University of Arizona
25.
Gish Allouche, Genevieve.
Implementation and Verification of RCWA Model
.
Degree: 2018, University of Arizona
URL: http://hdl.handle.net/10150/630137
► An RCWA Matlab simulation was developed to guide future designs of phase plates for VCSELs. We will discuss the verification process to validate our current…
(more)
▼ An RCWA Matlab simulation was developed to guide future designs of phase plates for VCSELs. We will discuss the verification process to validate our current model. Moreover, we will compare and contrast these results from the ones obtained from other software models, Polaris-M and OptiScan. A comparison between theoretical and experimental results will further test the validity of the model. Our second goal is to demonstrate experimentally Rayleigh anomalies, predicted by Harvey and Pfisterer’s non-paraxial scalar theory.
Advisors/Committee Members: Milster, Thomas D (advisor), Chipman, Russell (committeemember), Kocot, Chris (committeemember).
Subjects/Keywords: diffraction theory;
non-paraxial scalar theory;
RCWA;
rigorous coupled wave analysis;
verification
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gish Allouche, G. (2018). Implementation and Verification of RCWA Model
. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/630137
Chicago Manual of Style (16th Edition):
Gish Allouche, Genevieve. “Implementation and Verification of RCWA Model
.” 2018. Masters Thesis, University of Arizona. Accessed March 04, 2021.
http://hdl.handle.net/10150/630137.
MLA Handbook (7th Edition):
Gish Allouche, Genevieve. “Implementation and Verification of RCWA Model
.” 2018. Web. 04 Mar 2021.
Vancouver:
Gish Allouche G. Implementation and Verification of RCWA Model
. [Internet] [Masters thesis]. University of Arizona; 2018. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10150/630137.
Council of Science Editors:
Gish Allouche G. Implementation and Verification of RCWA Model
. [Masters Thesis]. University of Arizona; 2018. Available from: http://hdl.handle.net/10150/630137
26.
Meng, Bo.
Calculation of Extreme Wave Loads on Coastal Highway Bridges.
Degree: PhD, Ocean Engineering, 2010, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-254
► Coastal bridges are exposed to severe wave, current and wind forces during a hurricane. Most coastal bridges are not designed to resist wave loads in…
(more)
▼ Coastal bridges are exposed to severe
wave, current and wind forces during a hurricane. Most coastal bridges are not designed to resist
wave loads in such extreme situations, and there are no existing analytical methods to calculate
wave loads on coastal highway bridges. This study focuses on developing a new scheme to estimate the extreme
wave loads on bridges for designing purpose. In order to do this, a 2D
wave velocity potential model (2D Model) is set up for the deterministic analysis of
wave force on bridge decks.
2D Model is a linear
wave model, which has the capability of calculating
wave velocity potential components in time domain based on
wave parameters such as
wave height,
wave period and water depth, and complex structural geometries. 2D Model has Laplace equation as general equation. The free surface boundary, incoming and outgoing
wave boundary conditions are linearized, decomposed first, and then solved by the finite difference method. Maximum
wave forces results calculated by the linear 2D Model are compared with results from CFD software Flow3D that is using Navier Stokes theory up to the 5th order; and 2D Model is validated by comparing results with experiment data. A case study is conducted for calculating extreme
wave forces on I-10 Bridge across Escambia Bay, Florida during Hurricane Ivan in September 2004.SWAN model is adapted to investigate the parameters of
wave heights and
wave periods around bridge sites. SWAN model has the capability of predicting or hindcasting significant
wave heights and
wave periods as long as the domain and input parameters are given. The predicted significant
wave heights are compared with measurements by Buoy Station 42039 and 42040 nearest to Escambia Bay.
A new prediction equation of maximum uplift
wave forces on bridge decks is developed in terms of
wave height,
wave period, water depth, bridge width, water clearance and over top water load. To develop the equations, the relationship is investigated between maximum uplift
wave forces and
wave parameters, water clearance, green water effects and bridge width. 2D Model is used for up to 1886 cases with difference parameters. Flow3D model is adopted to determine coefficients of water clearance and green water effects, which cannot be calculated by 2D Model.
Advisors/Committee Members: Jin, Jun (advisor), Zhang, Jun (committee member), Panchang, Vijay (committee member), Newton, H. J. (committee member).
Subjects/Keywords: wave loads; bridge; diffraction; flow3d
…The wave potential diffraction theory is capable of filling the gap in which there
are no… …x28;1962) used a theoretical
approach to study wave diffraction around a single breakwater… …1971, Cheong et al. 1996) are also used
to solve wave diffraction and refraction… …viii
CHAPTER
Page
Wave Periods… …102
5.7.4 Estimation Equations According to Wave Heights and
Wave Period…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Meng, B. (2010). Calculation of Extreme Wave Loads on Coastal Highway Bridges. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-254
Chicago Manual of Style (16th Edition):
Meng, Bo. “Calculation of Extreme Wave Loads on Coastal Highway Bridges.” 2010. Doctoral Dissertation, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-254.
MLA Handbook (7th Edition):
Meng, Bo. “Calculation of Extreme Wave Loads on Coastal Highway Bridges.” 2010. Web. 04 Mar 2021.
Vancouver:
Meng B. Calculation of Extreme Wave Loads on Coastal Highway Bridges. [Internet] [Doctoral dissertation]. Texas A&M University; 2010. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-254.
Council of Science Editors:
Meng B. Calculation of Extreme Wave Loads on Coastal Highway Bridges. [Doctoral Dissertation]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-254

University of Manchester
27.
Nethercote, Matthew.
Effective analytic and asymptotic procedures for wave diffraction by perfect and penetrable wedges.
Degree: PhD, 2019, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/effective-analytic-and-asymptotic-procedures-for-wave-diffraction-by-perfect-and-penetrable-wedges(0158dced-e22b-4029-ab5e-fb5a053299d3).html
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.791232
► In this thesis, various canonical problems of plane wave diffraction by infinite two-dimensional wedges are studied in both acoustic and electromagnetic physical settings. The thesis…
(more)
▼ In this thesis, various canonical problems of plane wave diffraction by infinite two-dimensional wedges are studied in both acoustic and electromagnetic physical settings. The thesis is divided into two main parts. The first, which is essentially an extensive review of extant methods, focuses on wedge diffraction with homogeneous Dirichlet or Neumann boundary conditions. It involves studying the well-known solution to Sommerfeld's half-plane diffraction problem and provides an extensive review of the literature on the perfect wedge problem, including analytic methods such as the Sommerfeld-Malyuzhinets and Wiener-Hopf techniques, as well as asymptotic techniques such as Keller's geometrical theory of diffraction. The second part of the thesis is dedicated to the problem of diffraction by a penetrable wedge. To this day, there is no clear analytical solution to this important canonical problem, but there have been numerous attempts at computational and asymptotic solutions by many reputable authors using extensions of techniques applied to perfect wedge diffraction. Because it is penetrable, the material properties between the wedge scatterer and the exterior host differ. It is hence possible to define the so-called contrast parameter as the ratio of specific material properties (depending on the physical context) between the host and the scatterer. Throughout the thesis, this parameter is considered to be small and the contrast is said to be high. This assumption allows construction of an asymptotic iterative scheme, which enables the penetrable wedge problem to be written as an infinite sequence of impenetrable wedge problems. All but the first of these impenetrable wedge problems are solved using a combination of the Sommerfeld-Malyuzhinets and Wiener-Hopf techniques. The result is a sequence of complex nested integrals which are evaluated using a subtle interplay of interpolation, asymptotic expansions and advanced complex analysis. For several test cases, including those illustrated in this thesis (that were chosen for mathematical convenience and consistency with the literature), the numerical results were in good agreement with alternative approaches.
Subjects/Keywords: 510; Wave diffraction; Penetrable wedge; Sommerfeld-Malyuzhinets technique; Wiener-Hopf technique; Perfect (Impenetrable) wedge
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nethercote, M. (2019). Effective analytic and asymptotic procedures for wave diffraction by perfect and penetrable wedges. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/effective-analytic-and-asymptotic-procedures-for-wave-diffraction-by-perfect-and-penetrable-wedges(0158dced-e22b-4029-ab5e-fb5a053299d3).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.791232
Chicago Manual of Style (16th Edition):
Nethercote, Matthew. “Effective analytic and asymptotic procedures for wave diffraction by perfect and penetrable wedges.” 2019. Doctoral Dissertation, University of Manchester. Accessed March 04, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/effective-analytic-and-asymptotic-procedures-for-wave-diffraction-by-perfect-and-penetrable-wedges(0158dced-e22b-4029-ab5e-fb5a053299d3).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.791232.
MLA Handbook (7th Edition):
Nethercote, Matthew. “Effective analytic and asymptotic procedures for wave diffraction by perfect and penetrable wedges.” 2019. Web. 04 Mar 2021.
Vancouver:
Nethercote M. Effective analytic and asymptotic procedures for wave diffraction by perfect and penetrable wedges. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Mar 04].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/effective-analytic-and-asymptotic-procedures-for-wave-diffraction-by-perfect-and-penetrable-wedges(0158dced-e22b-4029-ab5e-fb5a053299d3).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.791232.
Council of Science Editors:
Nethercote M. Effective analytic and asymptotic procedures for wave diffraction by perfect and penetrable wedges. [Doctoral Dissertation]. University of Manchester; 2019. Available from: https://www.research.manchester.ac.uk/portal/en/theses/effective-analytic-and-asymptotic-procedures-for-wave-diffraction-by-perfect-and-penetrable-wedges(0158dced-e22b-4029-ab5e-fb5a053299d3).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.791232

Michigan State University
28.
Zhou, Faran.
Non-equilibrium phase transformations in charge-density wave and strongly correlated systems studied by coherent femtosecond electron diffraction.
Degree: 2019, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:48270
► Thesis Ph. D. Michigan State University. Physics 2019.
"By photo-exciting electrons in a material causing subsequent electron-electron and electron-phonon interactions, an energy landscape is created…
(more)
▼ Thesis Ph. D. Michigan State University. Physics 2019.
"By photo-exciting electrons in a material causing subsequent electron-electron and electron-phonon interactions, an energy landscape is created that is very different from that in thermal equilibrium. This distinction sets the baseline that photo-induced phase transitions (PIPT) could go through very different pathways compared with the thermally-induced phase transitions in equilibrium. This opens up a new dimension for complex materials research in non-equilibrium with ultrafast tools. In recent years, with the discovery of photo-induced superconductivity (SC) and other hidden quantum states, the study of these metastable and hidden phases in quantum materials has drawn intense interest in the ultrafast community.With femtosecond electron diffraction, we have observed intriguing phenomena in a few charge-density wave (CDW) materials (CeTe3, ErTe3 and 1T-TaS2) and iron chalcogenide systems (FeTe, FeSe0.44Te0.56 and FeSe). We explore the metastable hidden phases and observe universal dynamics in these materials far from equilibrium.CeTe3 exhibits uni-directional stripe CDW order in thermal equilibrium. Bi-directional CDW is thermodynamically forbidden. After femtosecond laser pulse excitation, the system is driven to a bi-directional order as it crosses a nonthermal fixed point. The new state is formed through associated symmetry changes that cause softening/hardening of CDW-related phonons. The CDW wavevector change proves that Fermi surface nesting (FSN)-enhanced electron-phonon coupling plays a central role in driving the CDW instabilities. Based on these results, we propose a nonthermal phase transition pathway in the non-equilibrium phase diagram.The work in ErTe3 is one step further based on the CeTe3 results. ErTe3 is on the opposite side of the rare-earth tritelluride (RETe3) series to host two orthogonal CDW orders at low temperature. Together with CeTe3 data, the ultrafast results at various temperatures in ErTe3 indicate that the system becomes more symmetric after laser excitation. Given the robustness of the data, the conclusion here may be extended to similar systems as well.The generic features of CDW dynamics in 1T-TaS2 are very similar to those in the quench dynamics of isolated quantum systems (e.g. cold atoms). After laser excitation, the system goes to the prethermalization plateau region before the thermalization stage. We find that both regimes follow universal scalings due to the existence of two nonthermal fixed points. Microscopically, we propose a chiral-symmetry-breaking mechanism that mediates the phase transformation. With a 2500 nm excitation laser, we emphasize the photo-doping, instead of the photo-thermal effect, in driving the phase transition. Due to the lack of thermal energy, the phase transition induced by the 2500 nm laser is more first order-like with faster switching speeds than 800 nm excitation. This high-speed switching with little thermal energy deposition holds promise for better future optoelectronic…
Advisors/Committee Members: Ruan, Chong-Yu, Birge, Norman, Duxbury, Phillip, Pellemoine, Frederique, Zhang, Pengpeng.
Subjects/Keywords: Phase transformations (Statistical physics); Wave mechanics; Electrons – Diffraction; Femtosecond lasers; Quantum theory; Physics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhou, F. (2019). Non-equilibrium phase transformations in charge-density wave and strongly correlated systems studied by coherent femtosecond electron diffraction. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:48270
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):
Zhou, Faran. “Non-equilibrium phase transformations in charge-density wave and strongly correlated systems studied by coherent femtosecond electron diffraction.” 2019. Thesis, Michigan State University. Accessed March 04, 2021.
http://etd.lib.msu.edu/islandora/object/etd:48270.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhou, Faran. “Non-equilibrium phase transformations in charge-density wave and strongly correlated systems studied by coherent femtosecond electron diffraction.” 2019. Web. 04 Mar 2021.
Vancouver:
Zhou F. Non-equilibrium phase transformations in charge-density wave and strongly correlated systems studied by coherent femtosecond electron diffraction. [Internet] [Thesis]. Michigan State University; 2019. [cited 2021 Mar 04].
Available from: http://etd.lib.msu.edu/islandora/object/etd:48270.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhou F. Non-equilibrium phase transformations in charge-density wave and strongly correlated systems studied by coherent femtosecond electron diffraction. [Thesis]. Michigan State University; 2019. Available from: http://etd.lib.msu.edu/islandora/object/etd:48270
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology
29.
Rivera Arreba, Irene (author).
Computation of Nonlinear Wave Loads on Floating Structures.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:684f77c9-6c3e-4951-921e-9b9f143a4202
► Floating wind turbines (FWTs) are proposed as a method to harness the significant wind energy resource in deep water. International research efforts have led to…
(more)
▼ Floating wind turbines (FWTs) are proposed as a method to harness the significant wind energy resource in deep water. International research efforts have led to the development of coupled numerical global analysis tools for FWTs in order to understand their behavior under wind and
wave actions. The hydrodynamic models in such tools are typically based on first-(and second-)order potential flow theory, sometimes also including Morison’s equation. In order to accurately model highly nonlinear waves, their interaction with a floating platform, and obtain estimates of the resulting loads on the structure, a numerical
wave tank approach is generally needed. In this thesis, the response of floating structures to nonlinear
wave loading is investigated by means of two different numerical approaches: a fully nonlinear Navier-Stokes/VOF solver and a second-order potential flow theory solver. Firstly, the fully nonlinear Navier-Stokes/VOF numerical
wave tank, developed within the open-source CFD toolbox OpenFOAM, is validated against experimental data for two cases. These comprise the response of a 2D floating box and a 3D floating vertical cylinder. In order to model the motions of the floating structures, together with the generation and absorption of the waves, the interDyMFoam solver, provided by the OpenFOAM library, is extended with the waves2Foam package, developed by Jacobsen et al. (2012). Furthermore, a simple catenary mooring line is implemented for the moored cases. Secondly, a potential flow theory based model of the OC5-semisubmersible floating platform is generated. The frequency-domain analysis is done with the Wadam software and the time-domain simulations with SIMO. This model is validated against measurement data from a 1:50 scale test campaign performed at the MARIN offshore
wave basin and the fully nonlinear validated CFD model. Lastly, both numerical models of the OC5-semisubmersible are compared in order to assess the suitability of the
diffraction model in two different conditions where nonlinearities are of relevance. The first one involves very long waves, with periods close to 20s, which are likely to take place under swell
wave conditions. These may excite the OC5-semisubmersible platform in heave at its natural frequency. The second situation deals with regular waves with increasing steepness. In principle, the fully nonlinear CFD model, if no experimental data is available, is needed to calibrate the
diffraction model. However, once the latter is adjusted and validated, results are given at a much lower computational cost. According to the computations throughout this work, when dealing with waves with high steepness and high excitation frequencies, the motions, as well as the peak forces, are properly captured by the
diffraction model. However, other local effects of importance for offshore structures, such as
wave run-up, or the different components in frequency of the loading, require the use of a fully nonlinear CFD solver. Therefore for preliminary design stages a
diffraction model is…
Advisors/Committee Members: Metrikine, Andrei (mentor), Viré, Axelle (mentor), Bachynski, E.E. (mentor), Paulsen, B.T. (mentor), Bruinsma, N. (mentor), Delft University of Technology (degree granting institution), Norwegian University of Science and Technology (NTNU) (degree granting institution).
Subjects/Keywords: CFD model; diffraction model; floating structures; OpenFOAM; nonlinear wave loads; fluid-structure interaction
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rivera Arreba, I. (. (2017). Computation of Nonlinear Wave Loads on Floating Structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:684f77c9-6c3e-4951-921e-9b9f143a4202
Chicago Manual of Style (16th Edition):
Rivera Arreba, Irene (author). “Computation of Nonlinear Wave Loads on Floating Structures.” 2017. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:684f77c9-6c3e-4951-921e-9b9f143a4202.
MLA Handbook (7th Edition):
Rivera Arreba, Irene (author). “Computation of Nonlinear Wave Loads on Floating Structures.” 2017. Web. 04 Mar 2021.
Vancouver:
Rivera Arreba I(. Computation of Nonlinear Wave Loads on Floating Structures. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:684f77c9-6c3e-4951-921e-9b9f143a4202.
Council of Science Editors:
Rivera Arreba I(. Computation of Nonlinear Wave Loads on Floating Structures. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:684f77c9-6c3e-4951-921e-9b9f143a4202
30.
Yi, Jue-Min.
Diffraction of single holes through planar and nanostructured metal films : Diffraction d'ouvertures sub-longueurs d'onde à travers des films métalliques réels.
Degree: Docteur es, Physique, 2013, Université de Strasbourg
URL: http://www.theses.fr/2013STRAF011
► Le sujet de ma thèse est l’étude de la diffraction par des trous sub-longueur percés dans des films métalliques, ainsi que la compréhension du rôle…
(more)
▼ Le sujet de ma thèse est l’étude de la diffraction par des trous sub-longueur percés dans des films métalliques, ainsi que la compréhension du rôle des plasmons de surface (SPs) dans la diffraction en champ lointain. Nous avons construit un goniomètre « fait maison » de haute qualité. Une série de trous unique percés dans un film opaque et variant continûment de k • r >> 1 à k • r << 1 ont été explorées. Ici, k est le vecteur d'onde de l'onde incidente et r est le rayon du trou. Les résultats expérimentaux indiquent que la diffraction de la lumière par un trou unique peut être séparée en quatre régimes, dépendant de la polarisation incidente. Une expression analytique simple révèle pour la première fois, l’implication de deux facteurs compétitifs: l'un lié aux plasmons de surface, et l'autre provenant du couplage du champ aux modes de guide d'onde de l'ouverture. Lorsque le trou est entouré par des corrugations concentriques (structure d'oeil de boeuf), et est illuminé avec les rainures sur le côté de sortie, l'effet de collimation est observé: la diffraction en champ lointain est confinée dans un très petit angle solide. L’influence des paramètres géométrique sur la figure de diffraction de l’œil de bœuf a été étudié et des motifs de diffraction dont la largeur est inférieure à 1 ° dans le champ lointain ont été atteints. Un autre mode de surface (CWs), différent des SPs, a été étudié sur des films de tungstène. Il a été démontré que les CWs permettent également d’obtenir un effet de collimation. À titre de comparaison, nous avons montré que la transmission exaltée est bien plus faible pour les CWs que pour les SPs sur nanostructures.
The theme of my thesis is to investigate the diffraction behavior of subwavelength holes in metal films, and to understand the surface plasmons’ (SPs) role in aperture far-field diffraction. We have built a home-made goniometer setup with high-level quality. A series of single hole continuously ranging from k•r>>1 to k•r<<1 in a flat opaque film were explored, where k is the wavevector of the incident wave and r is the radius of the hole. The experimental results indicated that the diffraction of single hole can be classified into four regimes, depending on the input polarization. A simple analytical expression reveals for the first time the subtle interplay of two competing factors: one related to surface plasmon excitation and the other originating in the coupling of the field to the waveguide mode of the aperture. When the hole is surrounded by concentric grooves (bull’s eye structure) and is illuminated with the grooves on the output side, the beaming effect occurs: far-field diffraction is confined in very small solid angle. The effects of geometrical parameters on bull’s eye diffraction have been studied and the diffraction patterns with the width less than 1° in the far field have been achieved. Another surface waves (CWs) different from SPs on tungsten films were studied. It was demonstrated that the CWs have beaming effect as well. By comparison we showed that CWs display…
Advisors/Committee Members: Ebbesen, Thomas W. (thesis director).
Subjects/Keywords: Diffraction; Plasmon de surface (SP); Onde de surface; Trou unique; Bull's eye; Argent; Tungstène; Diffraction; Surface plasmons (SPs); Surface wave; Single hole; Bull's eye; Silver; Bull's eye; 535.2; 620.5
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yi, J. (2013). Diffraction of single holes through planar and nanostructured metal films : Diffraction d'ouvertures sub-longueurs d'onde à travers des films métalliques réels. (Doctoral Dissertation). Université de Strasbourg. Retrieved from http://www.theses.fr/2013STRAF011
Chicago Manual of Style (16th Edition):
Yi, Jue-Min. “Diffraction of single holes through planar and nanostructured metal films : Diffraction d'ouvertures sub-longueurs d'onde à travers des films métalliques réels.” 2013. Doctoral Dissertation, Université de Strasbourg. Accessed March 04, 2021.
http://www.theses.fr/2013STRAF011.
MLA Handbook (7th Edition):
Yi, Jue-Min. “Diffraction of single holes through planar and nanostructured metal films : Diffraction d'ouvertures sub-longueurs d'onde à travers des films métalliques réels.” 2013. Web. 04 Mar 2021.
Vancouver:
Yi J. Diffraction of single holes through planar and nanostructured metal films : Diffraction d'ouvertures sub-longueurs d'onde à travers des films métalliques réels. [Internet] [Doctoral dissertation]. Université de Strasbourg; 2013. [cited 2021 Mar 04].
Available from: http://www.theses.fr/2013STRAF011.
Council of Science Editors:
Yi J. Diffraction of single holes through planar and nanostructured metal films : Diffraction d'ouvertures sub-longueurs d'onde à travers des films métalliques réels. [Doctoral Dissertation]. Université de Strasbourg; 2013. Available from: http://www.theses.fr/2013STRAF011
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