You searched for subject:(High speed chemiluminescence imaging)
.
Showing records 1 – 30 of
48865 total matches.
◁ [1] [2] [3] [4] [5] … [1629] ▶

University of Illinois – Urbana-Champaign
1.
Motily, Austen.
Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays.
Degree: MS, Mechanical Engineering, 2020, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/107927
► Among the range of commercially feasible propulsion systems, compression ignition (CI) engines present many advantages for light-duty vehicle operation. In particular, CI engines remain an…
(more)
▼ Among the range of commercially feasible propulsion systems, compression ignition (CI) engines present many advantages for light-duty vehicle operation. In particular, CI engines remain an optimal choice for unmanned aerial vehicles (UAVs) designed to operate at moderate flight speeds. However, one of the primary limitations of CI engines is that they require well-characterized, highly-reactive diesel fuel to operate properly. As the United States Department of Defense implements the single fuel concept and with global efforts to develop alternatively derived fuels, it is paramount that modern CI engines have the capability to perform with a diverse variety of fuel types. At its core, this challenge can be framed as an ignition problem, where low reactivity fuels and extreme operating conditions result in long ignition delays, engine misfires, and power loss. It is for this reason that novel ignition devices be developed to support reliable CI engine operation. Hot surface energy addition devices are a promising technology to improve ignition behavior, but the mechanisms by which the heating element supports the ignition process are not well understood.
This study evaluates the performance and limitations of commercial off-the-shelf (COTS) heating elements in functioning as continuous-use ignition devices for kerosene-fueled CI engines. Furthermore, it examines the interaction between a single
high-pressure fuel spray with a hot surface device in order to identify the most important parameters for optimizing ignition behavior. Results of these experiments demonstrate that existing heating elements can accelerate the ignition process for fuels with a wide range of reactivities, assuming a sufficient surface temperature can be achieved. Reaching these temperatures in an engine environment and maintaining these temperatures for long periods of operation, with acceptable heating element durability, will be the primary challenges in developing next-generation ignition systems.
Advisors/Committee Members: Lee, Tonghun (advisor).
Subjects/Keywords: Hot surface ignition; Rapid compression machine; Fuel spray ignition; Energy assisted ignition; High-pressure fuel spray; Ignition modes; Ignition device; Fuel spray heat release; Low-reactivity fuels; High-speed chemiluminescence imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Motily, A. (2020). Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/107927
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):
Motily, Austen. “Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays.” 2020. Thesis, University of Illinois – Urbana-Champaign. Accessed January 22, 2021.
http://hdl.handle.net/2142/107927.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Motily, Austen. “Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays.” 2020. Web. 22 Jan 2021.
Vancouver:
Motily A. Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2020. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/2142/107927.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Motily A. Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays. [Thesis]. University of Illinois – Urbana-Champaign; 2020. Available from: http://hdl.handle.net/2142/107927
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
2.
Gilarski, Lukasz.
Video Imaging Methodology for Estimation of Pile Capacity.
Degree: 2018, University of Waterloo
URL: http://hdl.handle.net/10012/13310
► Piles have been used for generations in areas with weak soil conditions to reinforce existing ground or to support bridges and structures. As the piling…
(more)
▼ Piles have been used for generations in areas with weak soil conditions to reinforce existing ground or
to support bridges and structures. As the piling industry increased over these years it was necessary
to develop prediction methods to optimize designs and provide cost savings in material and man
power.
Multiple predictive methods exist, in Ontario Ministry of Transportation (MTO) Modified Hiley
Formula, further referred to as Modified Hiley, is used to estimate pile capacities during an
installation program and provide a level of confidence in the design that was selected. Parameters
required to generate this estimate are historically obtained with a pen and paper and ruler while
standing below the pile driving equipment. Being inherently unsafe due to the noise and potential for
equipment failure another method was devised during this research using high speed cameras and
post processing techniques.
The first phase the research consisted of field data acquisition and collection of the pen and paper
plots and of high speed video. This was followed by writing of computer code to convert the highspeed
video into usable and legible data plots.
The second phase of research compared manually generated plots to plots generated using the highspeed
camera equipment and it was found that an excellent correlation existed. Based on this
correlation, subsequent parameters that were once measured manually or calculated with a timer were
instead extrapolated from a plot generated by the post processing software.
The third and final phase of research used the newly gathered data from the high-speed camera
equipment to calculate a predicted pile capacity for the MTO Modified Hiley, FHWA Gates and ENR
Bearing formulae. All variables that required field data were populated and predicted pile capacities
were computed without issue.
Despite the introduction of the post processed high-speed videos, it was found that this method could
be used as a substitute for the traditional pen and paper methods used today with further testing.
Subjects/Keywords: Thesis; Piling; High Speed Video; Video Imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gilarski, L. (2018). Video Imaging Methodology for Estimation of Pile Capacity. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/13310
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):
Gilarski, Lukasz. “Video Imaging Methodology for Estimation of Pile Capacity.” 2018. Thesis, University of Waterloo. Accessed January 22, 2021.
http://hdl.handle.net/10012/13310.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gilarski, Lukasz. “Video Imaging Methodology for Estimation of Pile Capacity.” 2018. Web. 22 Jan 2021.
Vancouver:
Gilarski L. Video Imaging Methodology for Estimation of Pile Capacity. [Internet] [Thesis]. University of Waterloo; 2018. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10012/13310.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gilarski L. Video Imaging Methodology for Estimation of Pile Capacity. [Thesis]. University of Waterloo; 2018. Available from: http://hdl.handle.net/10012/13310
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Duke University
3.
Llull, Patrick Ryan.
Temporal Coding of Volumetric Imagery
.
Degree: 2016, Duke University
URL: http://hdl.handle.net/10161/12194
► 'Image volumes' refer to realizations of images in other dimensions such as time, spectrum, and focus. Recent advances in scientific, medical, and consumer applications…
(more)
▼ 'Image volumes' refer to realizations of images in other dimensions such as time, spectrum, and focus. Recent advances in scientific, medical, and consumer applications demand improvements in image volume capture. Though image volume acquisition continues to advance, it maintains the same sampling mechanisms that have been used for decades; every voxel must be scanned and is presumed independent of its neighbors. Under these conditions, improving performance comes at the cost of increased system complexity, data rates, and power consumption. This dissertation explores systems and methods capable of efficiently improving sensitivity and performance for image volume cameras, and specifically proposes several sampling strategies that utilize temporal coding to improve
imaging system performance and enhance our awareness for a variety of dynamic applications. Video cameras and camcorders sample the video volume (x,y,t) at fixed intervals to gain understanding of the volume's temporal evolution. Conventionally, one must reduce the spatial resolution to increase the framerate of such cameras. Using temporal coding via physical translation of an optical element known as a coded aperture, the compressive temporal
imaging (CACTI) camera emonstrates a method which which to embed the temporal dimension of the video volume into spatial (x,y) measurements, thereby greatly improving temporal resolution with minimal loss of spatial resolution. This technique, which is among a family of compressive sampling strategies developed at Duke University, temporally codes the exposure readout functions at the pixel level. Since video cameras nominally integrate the remaining image volume dimensions (e.g. spectrum and focus) at capture time, spectral (x,y,t,λ) and focal (x,y,t,z) image volumes are traditionally captured via sequential changes to the spectral and focal state of the system, respectively. The CACTI camera's ability to embed video volumes into images leads to exploration of other information within that video; namely, focal and spectral information. The next part of the thesis demonstrates derivative works of CACTI: compressive extended depth of field and compressive spectral-temporal
imaging. These works successfully show the technique's extension of temporal coding to improve sensing performance in these other dimensions. Geometrical optics-related tradeoffs, such as the classic challenges of wide-field-of-view and
high resolution photography, have motivated the development of mulitscale camera arrays. The advent of such designs less than a decade ago heralds a new era of research- and engineering-related challenges. One significant challenge is that of managing the focal volume (x,y,z) over wide fields of view and resolutions. The fourth chapter shows advances on focus and image quality assessment for a class of multiscale gigapixel cameras developed at Duke. Along the same line of work, we have explored methods for dynamic and adaptive addressing of focus via point…
Advisors/Committee Members: Brady, David J (advisor).
Subjects/Keywords: Optics;
Compressive sensing;
Computational imaging;
High speed imaging;
Tomographic imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Llull, P. R. (2016). Temporal Coding of Volumetric Imagery
. (Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/12194
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):
Llull, Patrick Ryan. “Temporal Coding of Volumetric Imagery
.” 2016. Thesis, Duke University. Accessed January 22, 2021.
http://hdl.handle.net/10161/12194.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Llull, Patrick Ryan. “Temporal Coding of Volumetric Imagery
.” 2016. Web. 22 Jan 2021.
Vancouver:
Llull PR. Temporal Coding of Volumetric Imagery
. [Internet] [Thesis]. Duke University; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10161/12194.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Llull PR. Temporal Coding of Volumetric Imagery
. [Thesis]. Duke University; 2016. Available from: http://hdl.handle.net/10161/12194
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Purdue University
4.
Fuller, Tristan Latimer.
Review of Chemiluminescence as an Optical Diagnostic Tool for High Pressure Unstable Rockets.
Degree: MSin Aeronautics and Astronautics, Aeronautics and Astronautics, 2015, Purdue University
URL: https://docs.lib.purdue.edu/open_access_theses/1176
► The purpose of this project was to investigate the effects of optical absorption on line-of-sight integrated chemiluminescence measurements in high pressure rockets. The use of…
(more)
▼ The purpose of this project was to investigate the effects of optical absorption on line-of-sight integrated
chemiluminescence measurements in
high pressure rockets. The use of chemiluminescent emissions has been used in the past in an effort to characterise the flame reaction zone and the corresponding heat release, however most efforts have been with low pressure or atmospheric flames. Chemiluminescent measurements have been used in the case of the Continuously Variable Resonant Combustor (CVRC) in an attempt to validate a CFD simulation of the same system, although the CVRC operates at a higher pressure. For higher pressure flames it is unclear if such measurements are valid. To bridge the gap between the experimental and numerical data a spectroscopic model was created to study the validity of chemiluminescent based measurements in the CVRC. It was found that the CVRC combustion medium is optically opaque for the chemiluminescent emissions produced by OH* and optically transparent for the chemiluminescent emissions produced by CH*. Unfortunately, the emissions produced by CH* are largely influenced by the emissions produced by CO_2^*. As such, both OH* and CH* are poor indicators of the heat release in the CVRC and therefore
chemiluminescence measurements are not useful in validating the CVRC CFD simulation.
Advisors/Committee Members: William E Anderson, Carson D Slabaugh, Robert P Lucht, Stephen D Heister.
Subjects/Keywords: Chemiluminescence; High Pressure
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fuller, T. L. (2015). Review of Chemiluminescence as an Optical Diagnostic Tool for High Pressure Unstable Rockets. (Thesis). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_theses/1176
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):
Fuller, Tristan Latimer. “Review of Chemiluminescence as an Optical Diagnostic Tool for High Pressure Unstable Rockets.” 2015. Thesis, Purdue University. Accessed January 22, 2021.
https://docs.lib.purdue.edu/open_access_theses/1176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fuller, Tristan Latimer. “Review of Chemiluminescence as an Optical Diagnostic Tool for High Pressure Unstable Rockets.” 2015. Web. 22 Jan 2021.
Vancouver:
Fuller TL. Review of Chemiluminescence as an Optical Diagnostic Tool for High Pressure Unstable Rockets. [Internet] [Thesis]. Purdue University; 2015. [cited 2021 Jan 22].
Available from: https://docs.lib.purdue.edu/open_access_theses/1176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fuller TL. Review of Chemiluminescence as an Optical Diagnostic Tool for High Pressure Unstable Rockets. [Thesis]. Purdue University; 2015. Available from: https://docs.lib.purdue.edu/open_access_theses/1176
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Macquarie University
5.
Zheng, Xianlin.
Development of time-gated luminescence bio-imaging instruments.
Degree: 2016, Macquarie University
URL: http://hdl.handle.net/1959.14/1261162
► Thesis by publication.
Bibliography: Pages 135-138.
Chapter 1: Introduction – Chapter 2: Multi-colour time-gated luminescence microscopy – Chapter 3: Time-gated animal imaging system – Chapter…
(more)
▼ Thesis by publication.
Bibliography: Pages 135-138.
Chapter 1: Introduction – Chapter 2: Multi-colour time-gated luminescence microscopy – Chapter 3: Time-gated animal imaging system – Chapter 4: Encoder-assisted scanning microscopy – Chapter 5: Conclusions and perspectives
The general goal for biosensing is to realize ultra-sensitive, high-contrast, rapid and high throughput detection, localization and quantification of trace amounts of biomolecules and diseased cells of rare types within complex samples. Luminescent probes, such as lanthanidecomplexes and photon upconversion nanomaterials, hold the potential to realize this goal due to their unique optical properties, which include long luminescence lifetimes in the microsecond region and as well sharp spectral emission spectra. Application of the time-gated and time-resolved techniques based on these probes will provide background-free detection conditions. But such a potential has been seriously limited by the availability of suitable instruments
The focus of my PhD research program is the development and the design of new instruments to realize time-domain detection towards advanced optical characterizations of luminescent materials and their analytical applications in biosensing and bioimaging. Specifically, my research project aims to advance and translate the time-gated luminescence detection technique into three prototype instruments -the multi-colour microscope, the invivo imaging system, and the high-speed scanning cytometry
The development of the first instrument, a multi-colour microscope, in this work had the specific aims of (a) increasing the detection efficiency, (b) improving the compatibility and stability, and (c) reducing the cost and complexity associated with time-gated luminescence microscopes. These aims were met by designing and engineering a high-efficiency excitation unit that is based on a high power and high repetition rate Xenon flash lamp, to provide broadband illumination for simultaneously exciting multiple lanthanide luminescent probes. The time-gated detection module of this apparatus is optimised by using a fast-rotating optimal chopper with a pinhole on the edge of the chopper blade to realise a high switching speed. The modular design has been proved to offer high compatibility and stability when installed to a commercial inverted microscope, and high-contrast dual-colour imaging has been demonstrated in this work by imaging two types of micro-organisms stained by a red-emitting europium complex and a green-emitting terbium complex, respectively, using this setup.
The second instrument, an in-vivo imaging system, extended the time-gated technique usedi n background-free small animal imaging. In this work, the mechanics and optics of the time-gated detection unit of this instrument was re-designed so that this instrument became more suited to the visualization of upconversion nanoparticles when it was used as the optical contrast agents. Their ability to be excited at 980 nm and emit at 800 nm are…
Advisors/Committee Members: Macquarie University. Department of Physics and Astronomy.
Subjects/Keywords: Chemiluminescence; Fluorescence microscopy; long-lived luminescence; lanthanide; time-gated luminescence microscope; time-resolved; high throughput; high resolution; in-vivo imaging system
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zheng, X. (2016). Development of time-gated luminescence bio-imaging instruments. (Doctoral Dissertation). Macquarie University. Retrieved from http://hdl.handle.net/1959.14/1261162
Chicago Manual of Style (16th Edition):
Zheng, Xianlin. “Development of time-gated luminescence bio-imaging instruments.” 2016. Doctoral Dissertation, Macquarie University. Accessed January 22, 2021.
http://hdl.handle.net/1959.14/1261162.
MLA Handbook (7th Edition):
Zheng, Xianlin. “Development of time-gated luminescence bio-imaging instruments.” 2016. Web. 22 Jan 2021.
Vancouver:
Zheng X. Development of time-gated luminescence bio-imaging instruments. [Internet] [Doctoral dissertation]. Macquarie University; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1959.14/1261162.
Council of Science Editors:
Zheng X. Development of time-gated luminescence bio-imaging instruments. [Doctoral Dissertation]. Macquarie University; 2016. Available from: http://hdl.handle.net/1959.14/1261162
6.
渡邊, 毅.
Vocal-Fold Vibration of Patients with Reinke’s Edema Observed Using High-Speed Digital Imaging : ハイスピードデジタル画像を用いたポリープ様声帯例の声帯振動観察に関する研究.
Degree: 博士(医学), 2016, Nagasaki University / 長崎大学
URL: http://hdl.handle.net/10069/37045
► Objective: We aimed to assess the vocal-fold vibration of patients with moderate-to-severe Reinke's edema using high-speed digital imaging (HSDI) and videostroboscopy and to confirm HSDI…
(more)
▼ Objective: We aimed to assess the vocal-fold vibration of patients with moderate-to-severe Reinke's edema using high-speed digital imaging (HSDI) and videostroboscopy and to confirm HSDI usefulness in examining the vocal folds with Reinke's edema. Methods: We examined the vocal folds of seven patients (six severe and one moderate; six females and one male; aged 55–74 years; mean 64.7 years) with Reinke's edema using HSDI and videostroboscopy. The following characteristics were analyzed: glottic closure, mucosal-wave propagation, left–right asymmetry, phase shift, frequency difference, periodicity, and contact of the true vocal fold with the false vocal fold. Results: HSDI revealed complete glottic closure, anterior–posterior phase shift, and obvious contact of at least one side of the edematous true vocal fold with the ipsilateral false vocal fold in all patients. Mucosal-wave propagation increased in six patients and decreased in one. Left–right asymmetry was observed in six patients. Left–right phase shifts and left–right frequency differences were observed in four and two patients, respectively. The vibration was periodic in four patients, quasi-periodic in three, and aperiodic in none. Anterior–posterior frequency differences were not observed for any patient. The vocal-fold vibration always synchronized with strobolights in two patients, while the vibration occasionally and never synchronized in two and three patients, respectively. In one patient whose vibration occasionally synchronized, videostroboscopy could not reveal the slight left–right frequency difference of the vibration. Conclusion: It was often difficult to observe vocal-fold vibration correctly in patients with severe Reinke's edema using videostroboscopy. However, HSDI was useful for examining these patients. Our results suggest that HSDI can be very useful for examining the vocal folds of patients with severe Reinke's edema.
Subjects/Keywords: High-speed digital imaging; Videostroboscopy; Vocal-fold vibration; Reinke's edema
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
渡邊, . (2016). Vocal-Fold Vibration of Patients with Reinke’s Edema Observed Using High-Speed Digital Imaging : ハイスピードデジタル画像を用いたポリープ様声帯例の声帯振動観察に関する研究. (Thesis). Nagasaki University / 長崎大学. Retrieved from http://hdl.handle.net/10069/37045
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):
渡邊, 毅. “Vocal-Fold Vibration of Patients with Reinke’s Edema Observed Using High-Speed Digital Imaging : ハイスピードデジタル画像を用いたポリープ様声帯例の声帯振動観察に関する研究.” 2016. Thesis, Nagasaki University / 長崎大学. Accessed January 22, 2021.
http://hdl.handle.net/10069/37045.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
渡邊, 毅. “Vocal-Fold Vibration of Patients with Reinke’s Edema Observed Using High-Speed Digital Imaging : ハイスピードデジタル画像を用いたポリープ様声帯例の声帯振動観察に関する研究.” 2016. Web. 22 Jan 2021.
Vancouver:
渡邊 . Vocal-Fold Vibration of Patients with Reinke’s Edema Observed Using High-Speed Digital Imaging : ハイスピードデジタル画像を用いたポリープ様声帯例の声帯振動観察に関する研究. [Internet] [Thesis]. Nagasaki University / 長崎大学; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10069/37045.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
渡邊 . Vocal-Fold Vibration of Patients with Reinke’s Edema Observed Using High-Speed Digital Imaging : ハイスピードデジタル画像を用いたポリープ様声帯例の声帯振動観察に関する研究. [Thesis]. Nagasaki University / 長崎大学; 2016. Available from: http://hdl.handle.net/10069/37045
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – San Diego
7.
McElfresh, Cameron.
Spark Erosion as a Novel Method of Producing Bimodal Structured 316L Stainless Steel.
Degree: NanoEngineering, 2018, University of California – San Diego
URL: http://www.escholarship.org/uc/item/4bv2121x
► The process of spark erosion employs an electric discharge to break down bulk materials into fine powders and has been developed to produce nanostructured powders…
(more)
▼ The process of spark erosion employs an electric discharge to break down bulk materials into fine powders and has been developed to produce nanostructured powders of metallic, ceramic, and semiconducting materials. This work demonstrates the optimization of charge morphology, energy parameters, and liquid dielectric of a “shaker-pot” spark erosion process to produce maximum yields and size-specific nanopowders. Nanopowders were assessed using x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission scanning electron microscopy (t-SEM), dynamic light scattering (DLS), and a new multispectral advanced nanoparticle tracking analysis (MANTA) technique. Additional efforts were taken to evaluate the new MANTA technique and its performance capabilities and limitations for application in fast and accurate particle size analysis. A single-spark apparatus was also constructed to evaluate the discharge mechanics relevant to nanoparticle formation. High-speed imaging and spectroscopy were used to investigate the characteristic plasma arc, shock wave, and plume evolution in a submerged capacitive discharge system. The effects of varying both the capacitance and liquid dielectric (liquid nitrogen/ethanol) are evaluated. Discharge features such as plume temperature and time are discussed with respect to previous findings and active particle formation mechanisms that influence size-tunability of the spark erosion technique.
Subjects/Keywords: Materials Science; High-Speed Imaging; Particle Synthesis; Spark Erosion; Spectroscopy
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
McElfresh, C. (2018). Spark Erosion as a Novel Method of Producing Bimodal Structured 316L Stainless Steel. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/4bv2121x
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):
McElfresh, Cameron. “Spark Erosion as a Novel Method of Producing Bimodal Structured 316L Stainless Steel.” 2018. Thesis, University of California – San Diego. Accessed January 22, 2021.
http://www.escholarship.org/uc/item/4bv2121x.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
McElfresh, Cameron. “Spark Erosion as a Novel Method of Producing Bimodal Structured 316L Stainless Steel.” 2018. Web. 22 Jan 2021.
Vancouver:
McElfresh C. Spark Erosion as a Novel Method of Producing Bimodal Structured 316L Stainless Steel. [Internet] [Thesis]. University of California – San Diego; 2018. [cited 2021 Jan 22].
Available from: http://www.escholarship.org/uc/item/4bv2121x.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
McElfresh C. Spark Erosion as a Novel Method of Producing Bimodal Structured 316L Stainless Steel. [Thesis]. University of California – San Diego; 2018. Available from: http://www.escholarship.org/uc/item/4bv2121x
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Dundee
8.
Belotti, Yuri.
Microfluidic methods for investigating cell migration and cell mechanics.
Degree: PhD, 2016, University of Dundee
URL: https://discovery.dundee.ac.uk/en/studentTheses/fb5ac03d-a752-45a1-8b95-37c8180dc7d9
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687825
► In this thesis I explore how migratory properties of the model organism Dictyostelium discoideum are influenced by dimensionality and topology of the environment that surrounds…
(more)
▼ In this thesis I explore how migratory properties of the model organism Dictyostelium discoideum are influenced by dimensionality and topology of the environment that surrounds the cell. Additionally, I sought to develop a microfluidic device able to measure mechanical properties of single cells with a sufficient throughput to account for the inherent heterogeneity of biological samples. Throughout this thesis I made use of microfabrication methods such as photo-lithography and soft-lithography, to develop ad hoc microstructured substrates. These tools enabled me to tackle different biological and biomedical questions related to cell migration and cell mechanics. Confining cells into channels with low dimensionality appeared to regulate the velocity of cellular locomotion, as well as the migration strategy adopted by the cell. Spatial confinement induced an altered arrangement of the acto-myosin cytoskeleton and microtubules. Moreover, the spatial constraint resulted in a simplified, mono-dimensional migration, characterised by constant average speed. Additionally, some cellular processes tended to occur in a periodic fashion, upon confinement. Interestingly, if Dictyostelium cells migrated through asymmetric bifurcating micro- channels, they appeared to be able to undergo a ’decision-making’ process leading to a directional bias. Although the biophysical mechanism underlying this response is yet to be understood, the data shown in this thesis suggest that Dictyostelium cells respond to differences in local concentrations of chemoattractants. The speed of a cell that crawls in a channel also depends on the cell’s stiffness, that in turn represents a measure of the density and structure of its cytoskeleton. To date, only a few methods have been developed to investigate cell mechanics with sufficient throughput. This motivated my interest in developing a microfluidic-based device that, exploiting the recording capabilities of a modern high speed camera, enabled me to assess the cellular mechanical properties at a rate greater than 10,000 cells per second, without the need for cell labelling. In this thesis I presented an example of how this method can be employed to detect differences between healthy and cancerous prostate cells, as well as to differentiate between prostate and bladder cancer cells based on their mechanical response. In conclusion, the work presented in this thesis highlights the interdisciplinarity required to investigate complex biological and biomedical problems. Specifically, the use of quantitative approaches that span from microtechnology, live imaging, computer vision and computational modelling enabled me to investigate novel biological processes as well as to explore new diagnostic technologies that aim to promote the improvement of the future healthcare.
Subjects/Keywords: 571.6; Microfluidics; Cell migration; Cell mechanics; High speed imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Belotti, Y. (2016). Microfluidic methods for investigating cell migration and cell mechanics. (Doctoral Dissertation). University of Dundee. Retrieved from https://discovery.dundee.ac.uk/en/studentTheses/fb5ac03d-a752-45a1-8b95-37c8180dc7d9 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687825
Chicago Manual of Style (16th Edition):
Belotti, Yuri. “Microfluidic methods for investigating cell migration and cell mechanics.” 2016. Doctoral Dissertation, University of Dundee. Accessed January 22, 2021.
https://discovery.dundee.ac.uk/en/studentTheses/fb5ac03d-a752-45a1-8b95-37c8180dc7d9 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687825.
MLA Handbook (7th Edition):
Belotti, Yuri. “Microfluidic methods for investigating cell migration and cell mechanics.” 2016. Web. 22 Jan 2021.
Vancouver:
Belotti Y. Microfluidic methods for investigating cell migration and cell mechanics. [Internet] [Doctoral dissertation]. University of Dundee; 2016. [cited 2021 Jan 22].
Available from: https://discovery.dundee.ac.uk/en/studentTheses/fb5ac03d-a752-45a1-8b95-37c8180dc7d9 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687825.
Council of Science Editors:
Belotti Y. Microfluidic methods for investigating cell migration and cell mechanics. [Doctoral Dissertation]. University of Dundee; 2016. Available from: https://discovery.dundee.ac.uk/en/studentTheses/fb5ac03d-a752-45a1-8b95-37c8180dc7d9 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687825

University of Washington
9.
Chen, Hong.
Ultra-high Speed Optical Imaging of Ultrasound-activated Microbubbles in Mesenteric Microvessels.
Degree: 2011, University of Washington
URL: http://hdl.handle.net/1773/17094
► Ultrasound contrast agent microbubbles have gained widespread applications in diagnostic and therapeutic ultrasound. Animal studies of bioeffects induced by ultrasound-activated microbubbles have demonstrated that microbubbles…
(more)
▼ Ultrasound contrast agent microbubbles have gained widespread applications in diagnostic and therapeutic ultrasound. Animal studies of bioeffects induced by ultrasound-activated microbubbles have demonstrated that microbubbles can cause microvessel damage. Much scientific attention has been attracted to such microvascular bioeffects, not only because of the related safety concerns, but also because of the potential useful applications of microbubbles in the intravascular delivery of drugs and genetic materials into target tissues. A significant challenge in using microbubbles in medical ultrasound is the lack of knowledge about how the microbubbles behave in blood vessels when exposed to ultrasound and how their interactions with ultrasound cause vascular damage. Although extensive studies were performed in the past to study the dynamics of microbubbles, most of those studies were performed in vitro and did not directly address the clinical environment in which microbubbles are injected into blood vessels.
In this thesis work, a synchronized optical-acoustic system was set up for ultra-high speed imaging of insonated microbubbles in microvessels. The recorded images revealed the formation of microjets penetrating the microbubbles, as well as vessel distention (motion outward against the surrounding tissue) and vessel invagination (motion inward toward the lumen) caused by the expansion and collapse of the microbubbles, respectively. Contrary to current paradigms which propose that microbubbles damage vessels either by distending them or by forming liquid jets impinging on them, microbubbles translation and jetting were in the direction away from the nearest vessel wall; furthermore, invagination typically exceeded distention in arterioles and venules. Vessel invagination was found to be associated with vascular damage. These studies suggest that vessel invagination may be a newly discovered potential mechanism for vascular damage by ultrasound-activated microbubbles. The dynamics of bubble-vessel interactions are coupled intimately with the viscoelastic properties of the microvessels. To probe these properties, a method based on the relaxation times of the invaginated microvessels was used to estimate the relaxation time constants of the microvessels. It was found that the time constants were on microsecond time scales, which provided insight into the unique and unknown viscoelastic properties of the microvessels.
Subjects/Keywords: Ultrasound; microbubble; bioeffect; optical imaging; ultra-high speed photography; blood vessel
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, H. (2011). Ultra-high Speed Optical Imaging of Ultrasound-activated Microbubbles in Mesenteric Microvessels. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/17094
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, Hong. “Ultra-high Speed Optical Imaging of Ultrasound-activated Microbubbles in Mesenteric Microvessels.” 2011. Thesis, University of Washington. Accessed January 22, 2021.
http://hdl.handle.net/1773/17094.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Hong. “Ultra-high Speed Optical Imaging of Ultrasound-activated Microbubbles in Mesenteric Microvessels.” 2011. Web. 22 Jan 2021.
Vancouver:
Chen H. Ultra-high Speed Optical Imaging of Ultrasound-activated Microbubbles in Mesenteric Microvessels. [Internet] [Thesis]. University of Washington; 2011. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1773/17094.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen H. Ultra-high Speed Optical Imaging of Ultrasound-activated Microbubbles in Mesenteric Microvessels. [Thesis]. University of Washington; 2011. Available from: http://hdl.handle.net/1773/17094
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Louisiana State University
10.
Perkins, Aimee Elaine.
Differentiation of voice disorders using objective parameters from harmonic waveform modeling in high-speed digital imaging.
Degree: MA, Communication Sciences and Disorders, 2013, Louisiana State University
URL: etd-04152013-113343
;
https://digitalcommons.lsu.edu/gradschool_theses/2228
► High-speed digital imaging (HSDI) has recently become clinically available for the direct observation of vocal fold movement in the last 20 years. However, before it…
(more)
▼ High-speed digital imaging (HSDI) has recently become clinically available for the direct observation of vocal fold movement in the last 20 years. However, before it can become routinely used in the clinical setting, a universal means of objectively analyzing and interpreting the HSDI data must be established. In this study, preliminary data was gathered for five parameters used to objectively analyze vocal fold vibratory patterns observed with HSDI. The parameters investigated were established by Ikuma, Kunduk, and McWhorter (2012a) and were previously studied with a small sample (N=8) comparing pre and post-phonosurgical removal of benign lesions. The five parameters included fundamental frequency standard deviation (F0SD), harmonics-to-noise ratio (HNR) mean, open quotient (OQ) mean, speed index (SI) mean, and relative glottal gap (RGG) mean. The current study aimed to statistically and visually analyze measurements of the five objective parameters for differences between pathology groups with different etiologies. High-speed videos (N=50) were divided into five groups based on one of the following medical diagnoses: normal voice, vocal fold nodules, polyps, true vocal fold motion impairment (TVFMI), and adductor spasmodic dysphonia (ADSD). Statistical analysis showed that HNR mean differentiated normal voices from ADSD voices and that F0 mean differentiated ADSD voices from all groups except vocal fold nodules (p < 0.005). Visual analysis revealed a strong trend for RGG mean to differentiate vocal fold nodules from all other groups. Less prominent visual trends for OQ mean and SI mean were also noted.
Subjects/Keywords: high-speed digital imaging; objective parameters; voice disorders
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Perkins, A. E. (2013). Differentiation of voice disorders using objective parameters from harmonic waveform modeling in high-speed digital imaging. (Masters Thesis). Louisiana State University. Retrieved from etd-04152013-113343 ; https://digitalcommons.lsu.edu/gradschool_theses/2228
Chicago Manual of Style (16th Edition):
Perkins, Aimee Elaine. “Differentiation of voice disorders using objective parameters from harmonic waveform modeling in high-speed digital imaging.” 2013. Masters Thesis, Louisiana State University. Accessed January 22, 2021.
etd-04152013-113343 ; https://digitalcommons.lsu.edu/gradschool_theses/2228.
MLA Handbook (7th Edition):
Perkins, Aimee Elaine. “Differentiation of voice disorders using objective parameters from harmonic waveform modeling in high-speed digital imaging.” 2013. Web. 22 Jan 2021.
Vancouver:
Perkins AE. Differentiation of voice disorders using objective parameters from harmonic waveform modeling in high-speed digital imaging. [Internet] [Masters thesis]. Louisiana State University; 2013. [cited 2021 Jan 22].
Available from: etd-04152013-113343 ; https://digitalcommons.lsu.edu/gradschool_theses/2228.
Council of Science Editors:
Perkins AE. Differentiation of voice disorders using objective parameters from harmonic waveform modeling in high-speed digital imaging. [Masters Thesis]. Louisiana State University; 2013. Available from: etd-04152013-113343 ; https://digitalcommons.lsu.edu/gradschool_theses/2228

Louisiana State University
11.
Wei, Zhenyi.
Dynamic characterization of vocal fold virbrations.
Degree: PhD, Mechanical Engineering, 2012, Louisiana State University
URL: etd-06262012-110651
;
https://digitalcommons.lsu.edu/gradschool_dissertations/1799
► An emerging trend among voice specialists is the use of <i>quantitative</i> protocols for the diagnosis and treatment of voice disorders. Vocal fold vibrations are…
(more)
▼ An emerging trend among voice specialists is the use of <i>quantitative</i> protocols for the diagnosis and treatment of voice disorders. Vocal fold vibrations are directly related to voice quality. This research is devoted to providing an objective means of characterizing these vibrations. Our goal is to develop a dynamic model of vocal fold vibration, and map the parameter space of the model to a class of voice disorders; thus, furthering the assessment and diagnosis of voice disorder in clinical settings. To this end, this dissertation introduces a new seven-mass biomechanical model for the vibration of vocal folds. The model is based on the body-cover layer concept of the vocal fold biomechanics, and segments the cover layer into three masses along the longitudinal direction of the vocal fold. This segmentation facilitates the model comparison with the motion of the vocal glottis contour derived from modern high-speed digital imaging systems. The model simulation is compared to 14 sets of experimental data from human subjects with healthy vocal folds and pathological vocal folds including nodule, polyp, and unilateral paralysis. We also propose a semi-empirical two-stage procedure for tuning the parameters so that the model response matches as closely as possible the experimental data in the time and frequency domains. The first stage involves the manual coarse tuning of parameters based on limited data to expedite the process. The second stage is an automatic (or manual) fine tuning process on a subset of the parameters tuned in the first stage based on a larger amount of data. Once an ‘optimal’ set of model parameters has been identified, two model-based factors, quantifying the asymmetry between left and right vocal folds and anterior and posterior segments of the vocal folds, are introduced and calculated for each of the 14 cases. The two factors form an asymmetry plane. Based on the value of the asymmetry factors for the 14 cases, the plane is subdivided into four regions corresponding to healthy vocal folds, nodule, polyp, and unilateral paralysis. This yields a clear visual aid for clinicians, correlating the model parameters to voice quality.
Subjects/Keywords: vocal folds; vibration; dynamics; modeling; high-speed digital imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wei, Z. (2012). Dynamic characterization of vocal fold virbrations. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-06262012-110651 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1799
Chicago Manual of Style (16th Edition):
Wei, Zhenyi. “Dynamic characterization of vocal fold virbrations.” 2012. Doctoral Dissertation, Louisiana State University. Accessed January 22, 2021.
etd-06262012-110651 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1799.
MLA Handbook (7th Edition):
Wei, Zhenyi. “Dynamic characterization of vocal fold virbrations.” 2012. Web. 22 Jan 2021.
Vancouver:
Wei Z. Dynamic characterization of vocal fold virbrations. [Internet] [Doctoral dissertation]. Louisiana State University; 2012. [cited 2021 Jan 22].
Available from: etd-06262012-110651 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1799.
Council of Science Editors:
Wei Z. Dynamic characterization of vocal fold virbrations. [Doctoral Dissertation]. Louisiana State University; 2012. Available from: etd-06262012-110651 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1799

Brno University of Technology
12.
Pešek, Jan.
Vysokorychlostní kamerový systém I-Speed 2 a jeho aplikace: High speed digital imaging system I-Speed 2 and its application.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/15971
► This thesis decribes basic principes of high speed digital imaging systems and it also describes potential of this application in real world. Second part of…
(more)
▼ This thesis decribes basic principes of
high speed digital
imaging systems and it also describes potential of this application in real world. Second part of this thesis describes producers of
high speed digital
imaging systems and parametres of their products. In this thesis is also decribes preparation of
imaging of fast move by system Olympus i-
SPEED 2, that include controling of CDU, RCP and ETHERNET units. In the end there are procedure of setting camera, lighting scene and possibility of Shutter.
Advisors/Committee Members: Pata, Vladimír (advisor), Dobšák, Petr (referee).
Subjects/Keywords: Nasnímání děje; vysokorychlostní kamera Olympus i-SPEED 2; Shutter; Imaging the process; high speed digital imaging system Olympus i-SPEED 2; Shutter
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pešek, J. (2019). Vysokorychlostní kamerový systém I-Speed 2 a jeho aplikace: High speed digital imaging system I-Speed 2 and its application. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/15971
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):
Pešek, Jan. “Vysokorychlostní kamerový systém I-Speed 2 a jeho aplikace: High speed digital imaging system I-Speed 2 and its application.” 2019. Thesis, Brno University of Technology. Accessed January 22, 2021.
http://hdl.handle.net/11012/15971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pešek, Jan. “Vysokorychlostní kamerový systém I-Speed 2 a jeho aplikace: High speed digital imaging system I-Speed 2 and its application.” 2019. Web. 22 Jan 2021.
Vancouver:
Pešek J. Vysokorychlostní kamerový systém I-Speed 2 a jeho aplikace: High speed digital imaging system I-Speed 2 and its application. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/11012/15971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pešek J. Vysokorychlostní kamerový systém I-Speed 2 a jeho aplikace: High speed digital imaging system I-Speed 2 and its application. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/15971
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oxford
13.
Li, Dongli.
Computational and experimental study of shock wave interactions with cells.
Degree: PhD, 2016, University of Oxford
URL: https://ora.ox.ac.uk/objects/uuid:38beffe8-06c9-4b49-89f8-f5318c527800
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.729906
► This thesis presents a combined numerical and experimental study on the response of kidney cells to shock waves. The motivation was to develop a mechanistic…
(more)
▼ This thesis presents a combined numerical and experimental study on the response of kidney cells to shock waves. The motivation was to develop a mechanistic model of cell deformation in order to improve the clinical use of shock waves, by either enhancing their therapeutic action against target cells or minimising their impact on healthy cells. An ultra-high speed camera was used to visualise individual cells, embedded in tissue-mimicking gel, in order to measure their deformation when subject to a shock wave from a clinical shock wave source. Advanced image processing was employed to extract the contour of the cell from the images. The evolution of the observed cell contour revealed a relatively small deformation during the compressional phase and a much larger deformation during the tensile phases of a shock wave. The experimental observations were captured by a numerical model which describes the volumetric cell response with a bilinear Equation of State and the deviatoric cell response with a viscoelastic framework. Experiments using human kidney cancer cells (CAKI-2) and noncancerous kidney cells (HRE and HK-2) were compared to the model in order to determine their mechanical properties. The differences between cancerous and noncancerous cells were exploited to demonstrate a design process by which shock waves may be able to improve the specificity on targeted cancer cells while having minimal effect on normal cells. The cell response to shock waves was studied in a more biophysically realistic environment to include influence of cell size, shape and orientation, and the presence of neighbouring cells. The most significant difference was predicted when cells were in a cluster in which case the presence of neighbouring cells resulted in a four-fold increase on the von Mises stress and the membrane strain. Finally the numerical model was extended to capture the effect of cell damage using one of two paradigms. In the first paradigm the model captured microdamage during one shock wave but then assumed that the cell recovered by the time the next shock wave arrived. The second model allowed microdamage to accumulate with increasing number of shock waves. These models may be able to explain the strong effect that shock wave loading rate has on tissue damage. In conclusion a validated numerical model has been developed which provides a mechanistic understanding of how cells respond to shock waves. The model has application in suggesting improved strategies for current uses of shock waves, e.g., lithotripsy, as well as opening up new indications such as cancer treatment.
Subjects/Keywords: 610.28; Acoustics; Mechanics – computational mechanics; Cell mechanics; shock waves; high speed imaging; computational mechanics
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, D. (2016). Computational and experimental study of shock wave interactions with cells. (Doctoral Dissertation). University of Oxford. Retrieved from https://ora.ox.ac.uk/objects/uuid:38beffe8-06c9-4b49-89f8-f5318c527800 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.729906
Chicago Manual of Style (16th Edition):
Li, Dongli. “Computational and experimental study of shock wave interactions with cells.” 2016. Doctoral Dissertation, University of Oxford. Accessed January 22, 2021.
https://ora.ox.ac.uk/objects/uuid:38beffe8-06c9-4b49-89f8-f5318c527800 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.729906.
MLA Handbook (7th Edition):
Li, Dongli. “Computational and experimental study of shock wave interactions with cells.” 2016. Web. 22 Jan 2021.
Vancouver:
Li D. Computational and experimental study of shock wave interactions with cells. [Internet] [Doctoral dissertation]. University of Oxford; 2016. [cited 2021 Jan 22].
Available from: https://ora.ox.ac.uk/objects/uuid:38beffe8-06c9-4b49-89f8-f5318c527800 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.729906.
Council of Science Editors:
Li D. Computational and experimental study of shock wave interactions with cells. [Doctoral Dissertation]. University of Oxford; 2016. Available from: https://ora.ox.ac.uk/objects/uuid:38beffe8-06c9-4b49-89f8-f5318c527800 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.729906

University of Dundee
14.
Conneely, Michael.
High-speed imaging of holographically trapped microbubble ensembles stimulated by clinically relevant pulsed ultrasound.
Degree: PhD, 2014, University of Dundee
URL: https://discovery.dundee.ac.uk/en/studentTheses/37b78423-14a9-4d5a-bdf1-e2a3562c66f0
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633752
► The development of ultrasound contrast agents, or microbubbles, over the past 40 years has increased the possibilities for diagnostic imaging, although, more recently they have…
(more)
▼ The development of ultrasound contrast agents, or microbubbles, over the past 40 years has increased the possibilities for diagnostic imaging, although, more recently they have been proposed as a new vehicle for delivery of drugs and genes. However, there yet remains a considerable lack of fundamental understanding of microbubble behaviour under ultrasound excitation which has restricted their translation to therapeutic use. This project focussed on three key areas relating to the generation, observation, and bioeffects of microbubbles and the ultrasound used in their excitation. The experimental endeavour involved first, a full characterisation of the performance of a rotating mirror high-speed camera (Cordin 550-62) that was previously used by our group [and others] to investigate microbubble dynamics. Specifically, the investigation begins with an assessment of the frame-rate reporting accuracy of the system, a key aspect to the robustness of quantitative measurements extracted from recorded image sequences. This is then followed by the demonstration of a novel method of analysis for examining the image formation process in this type of camera, which facilitates a sensor-by-sensor assessment of performance that was not previously realised. Consolidating with previous work from within the group, this new analysis method was used to clarify previous data, and in the process suggested the presence of a temporal anomaly embedded within recorded images. In addition, the analysis also revealed empirical evidence for the mechanisms leading to this anomaly. Following on, a holographic optical tweezer system was developed for the purpose of exercising precise spatial control over microbubbles within their experimental environment. By positioning microbubbles in specific arrangements, interesting behaviours that were not previously achieved experimentally in the context of shelled microbubbles, were observed. Furthermore, by careful positioning of microbubbles within the imaging plane, it was possible to exploit the temporal anomaly present in the camera to greatly improve the integrity of data recorded, and to also operate in an enhanced imaging mode. Group aspirations to accelerate the development of therapeutic microbubbles had previously generated some early work on the in-house generation of bespoke bubble populations using microfluidic lab-on-a-chip techniques. In order to facilitate further development in this area, a finite-element computational model was herein developed to aid next generation chip design. Finally, in a slightly different context, considering not only the mechanical effect a microbubble may effect in a therapeutic treatment, a single biological cell assay was developed in order to probe any mechanical effects that were induced by the excitation ultrasound itself. Capitalising on the precise force control possible with atomic force spectroscopy, the elastic moduli of cells pre- and post-ultrasound insonation (sans microbubbles) were recorded. These new developments have extended the group capability…
Subjects/Keywords: 616.07; Ultrasound; Microbubble; Optical tweezer; Optical trapping; Atomic force microscopy; Afm; High-speed imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Conneely, M. (2014). High-speed imaging of holographically trapped microbubble ensembles stimulated by clinically relevant pulsed ultrasound. (Doctoral Dissertation). University of Dundee. Retrieved from https://discovery.dundee.ac.uk/en/studentTheses/37b78423-14a9-4d5a-bdf1-e2a3562c66f0 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633752
Chicago Manual of Style (16th Edition):
Conneely, Michael. “High-speed imaging of holographically trapped microbubble ensembles stimulated by clinically relevant pulsed ultrasound.” 2014. Doctoral Dissertation, University of Dundee. Accessed January 22, 2021.
https://discovery.dundee.ac.uk/en/studentTheses/37b78423-14a9-4d5a-bdf1-e2a3562c66f0 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633752.
MLA Handbook (7th Edition):
Conneely, Michael. “High-speed imaging of holographically trapped microbubble ensembles stimulated by clinically relevant pulsed ultrasound.” 2014. Web. 22 Jan 2021.
Vancouver:
Conneely M. High-speed imaging of holographically trapped microbubble ensembles stimulated by clinically relevant pulsed ultrasound. [Internet] [Doctoral dissertation]. University of Dundee; 2014. [cited 2021 Jan 22].
Available from: https://discovery.dundee.ac.uk/en/studentTheses/37b78423-14a9-4d5a-bdf1-e2a3562c66f0 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633752.
Council of Science Editors:
Conneely M. High-speed imaging of holographically trapped microbubble ensembles stimulated by clinically relevant pulsed ultrasound. [Doctoral Dissertation]. University of Dundee; 2014. Available from: https://discovery.dundee.ac.uk/en/studentTheses/37b78423-14a9-4d5a-bdf1-e2a3562c66f0 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633752

University of Dundee
15.
Rolfsnes, Hans O.
Sonoptics : applications of light and sound in the context of biomedicine.
Degree: PhD, 2011, University of Dundee
URL: https://discovery.dundee.ac.uk/en/studentTheses/d4619c09-a1c5-4fc0-86f6-a1b95ff6b6a8
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578793
► Ultrasound, applied in combination with microbubbles, has potential as a means to enhance the uptake of therapeutic agents, which could include drugs and nucleic acids,…
(more)
▼ Ultrasound, applied in combination with microbubbles, has potential as a means to enhance the uptake of therapeutic agents, which could include drugs and nucleic acids, into biological cells. This process is commonly referred to as 'sonoporation', and the enhanced uptake can be caused through the incident ultrasonic pressure fi eld causing radial oscillations (cavitation) in the microbubbles, amongst other possibilities. However, the mechanisms responsible for any resultant increase in cell membrane permeability are not yet fully understood. This project focussed on achieving a more fundamental understanding of these salient processes by building on a platform of previous work within the group. One strand of the project involved a complete characterisation of the performance of a rotating mirror high speed camera (Cordin 550-62) that was previously used by our group [and others] to investigate microbubble cavitation phenomena and interactions with proximal cell membranes. Speci cally, I present herein an investigation into the image formation process with this type of camera, the essence of which stymied previous data interpretations. I demonstrate that an inherent asynchrony in the exposure of pixels within individual image frames leads to a temporal anomaly. This was achieved using low cost, flashing LED lights and resulted in the extraction of an algorithm to correct for the temporal anomaly. In a slightly diff erent context, the delivery of suitable ultrasonic fields is necessary to achieve a uniform treatment across a therapeutic target. This thesis also reports on a study on the design of ultrasonic lenses to alter the focal region of a focussed ultrasound transducer with the aim of producing focal regions that can enable sonoporation of tumours of varying sizes. We show that the use of lenses can be an inexpensive alternative to more complex systems such as phased array transducers. Design modelling and experimental testing of lens prototypes are presented along with preliminary results with tissue mimicking polyacrylamide gel phantoms. The target environment in which the process of sonoporation will be clinically useful (i.e. in the physiological circulation) can be simpli ed as a microfluidic system. One strategy for bubble mediated therapy involves the use of a pro-drug approach, that is, when two otherwise benign ingredients are loaded onto separate microbubble populations, but can become mixed at the anatomical target site by the action of focussed ultrasound whereupon a potent drug is produced. The required mixing can be achieved by the violent coalescence of nearby cavitating bubbles, their reaction product then being released and di ffused into the interiour of nearby cells through sonoporation. A study related to this field is presented here where laser induced thermocapillary flows are shown to cause mixing of the content of a drop in a microfluidic channel in a bid to understand the mixing process at a level that may assist future microbubble engineering strategy. To summarise then, the work…
Subjects/Keywords: 615.84; Ultrasound; Sonoporation; Microbubbles; Cavitation; Lenses; High speed imaging; Cordin; Microfluidics; Mixing; Thermocapillary flow pattern
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rolfsnes, H. O. (2011). Sonoptics : applications of light and sound in the context of biomedicine. (Doctoral Dissertation). University of Dundee. Retrieved from https://discovery.dundee.ac.uk/en/studentTheses/d4619c09-a1c5-4fc0-86f6-a1b95ff6b6a8 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578793
Chicago Manual of Style (16th Edition):
Rolfsnes, Hans O. “Sonoptics : applications of light and sound in the context of biomedicine.” 2011. Doctoral Dissertation, University of Dundee. Accessed January 22, 2021.
https://discovery.dundee.ac.uk/en/studentTheses/d4619c09-a1c5-4fc0-86f6-a1b95ff6b6a8 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578793.
MLA Handbook (7th Edition):
Rolfsnes, Hans O. “Sonoptics : applications of light and sound in the context of biomedicine.” 2011. Web. 22 Jan 2021.
Vancouver:
Rolfsnes HO. Sonoptics : applications of light and sound in the context of biomedicine. [Internet] [Doctoral dissertation]. University of Dundee; 2011. [cited 2021 Jan 22].
Available from: https://discovery.dundee.ac.uk/en/studentTheses/d4619c09-a1c5-4fc0-86f6-a1b95ff6b6a8 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578793.
Council of Science Editors:
Rolfsnes HO. Sonoptics : applications of light and sound in the context of biomedicine. [Doctoral Dissertation]. University of Dundee; 2011. Available from: https://discovery.dundee.ac.uk/en/studentTheses/d4619c09-a1c5-4fc0-86f6-a1b95ff6b6a8 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578793

University of Edinburgh
16.
Umoh, Utibe Godwin.
Multiscale analysis of cohesive fluidization.
Degree: PhD, 2018, University of Edinburgh
URL: http://hdl.handle.net/1842/28988
► Fluidization of a granular assembly of solid particles is a process where particles are suspended in a fluid by the upward flow of fluid through…
(more)
▼ Fluidization of a granular assembly of solid particles is a process where particles are suspended in a fluid by the upward flow of fluid through the bed. This process is important in industry as it has a wide range of applications due to the high mixing and mass transfer rates present as a result of the rapid movement of particles which occurs in the bed. The dynamics of fluidization is heavily dependent on the particle scale physics and the forces acting at a particle level. For particles with sizes and densities less than 100μm and 103 kg/m3, the importance of interparticle forces such as cohesion to the fluidization phenomena observed increases compared to larger particles where phenomena observed are more dependent on hydrodynamic forces. These smaller sized particles are increasingly in high demand in industrial processes due to the increasing surface area per unit volume obtained by decreasing the particle size. Decreasing particle however leads to an increase in the impact of cohesive interparticle forces present between particles thus altering fluidization phenomena. It is thus necessary to get a greater understanding of how these cohesive forces alter fluidization behaviour both at the particle and also at the bulk scale. This work begins with an experimental study of a fluidized bed using high speed imaging. The applicability of particle image velocimetry for a dense bed is examined with verification and validation studies showing that particle image velocimetry is able to accurately capture averaged velocity profiles for particles at the front wall. A digital image analysis algorithm which is capable of accurately extracting particle solid fraction data for a dense bed at non-optimum lighting conditions was also developed. Together both experimental techniques were used to extract averaged particle mass flux data capable of accurately capturing and probing fluidization phenomena for a dense fluidized bed. This simulation studies carried out for this work looks to examine the impact of cohesive forces introduced using a van der waal cohesion model on phenomena observed at different length scales using DEM-CFD simulations. Numerical simulations were run for Geldart A sized particles at different cohesion levels represented by the bond number and at different inlet gas velocities encompassing the different regimes fluidization regimes present. A stress analysis was used to examine the mechanical state of the expanded bed at different cohesion levels with the vertical component of the total stress showing negative tensile stresses observed at the center of the bed. Further analysis of the contact and cohesive components of the stress together with a kcore and microstructural analysis focusing on the solid fraction and coordination number profiles indicated that this negative total stress was caused by a decrease in the contact stress due to breakage of mechanical contacts as cohesive forces are introduced and increased. A pressure overshoot analysis was also conducted with the magnitude of the overshoot in…
Subjects/Keywords: fluidization; cohesion; numerical simulations; optimization; high speed imaging; digital image analysis algorithm
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Umoh, U. G. (2018). Multiscale analysis of cohesive fluidization. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/28988
Chicago Manual of Style (16th Edition):
Umoh, Utibe Godwin. “Multiscale analysis of cohesive fluidization.” 2018. Doctoral Dissertation, University of Edinburgh. Accessed January 22, 2021.
http://hdl.handle.net/1842/28988.
MLA Handbook (7th Edition):
Umoh, Utibe Godwin. “Multiscale analysis of cohesive fluidization.” 2018. Web. 22 Jan 2021.
Vancouver:
Umoh UG. Multiscale analysis of cohesive fluidization. [Internet] [Doctoral dissertation]. University of Edinburgh; 2018. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1842/28988.
Council of Science Editors:
Umoh UG. Multiscale analysis of cohesive fluidization. [Doctoral Dissertation]. University of Edinburgh; 2018. Available from: http://hdl.handle.net/1842/28988

University of Waterloo
17.
Ferreira dos Santos, Emanuel Bruno.
Influence of current pulse profile on metal transfer in pulsed gas metal arc welding.
Degree: 2017, University of Waterloo
URL: http://hdl.handle.net/10012/11723
► The increase in the requirements of safety and reliability demanded from the normalization institutes by the issue of normalizing standards, led to the need of…
(more)
▼ The increase in the requirements of safety and reliability demanded from the normalization institutes by the issue of normalizing standards, led to the need of the development of materials of superior properties. Owing to the development of metallurgy, the development of materials with extremely high values of strength and toughness was made possible. However, employing these materials in industrial applications is limited by the deterioration of their properties after the material is processed using techniques such as welding.
To cope with this challenge, several welding process have been developed. One of these processes is the pulse gas metal arc welding (GMAW-P), in which the arc current is periodically pulsed in order to achieve metal transfer and effectively join the material being dealt with, and this decrease the energy input to the base metal. Due to the advance of electronics and transistor technology there are a large number of current pulse profiles commercially available, with different degrees of complexity, designed for specific applications. Determining the balance between the complexity and benefits for the various pulse profiles and process modifications available is the main motivation for the research presented in this thesis. Specifically, the metal transfer of two commercially available current profiles was studied using high-speed imaging and high speed data acquisition of the electrical signal during welding, for different welding conditions. The results showed that the mode of metal transfer differs for the investigated profiles and that for the same pulse profile, as the pulse parameters are modified the metal and heat transfer changes, altering weld bead features such cross-sectional area and penetration.
Subjects/Keywords: Welding; GMAW; GMAW-P; High Speed Imaging; Metal Transfer; Current Pulse Profile
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ferreira dos Santos, E. B. (2017). Influence of current pulse profile on metal transfer in pulsed gas metal arc welding. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11723
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):
Ferreira dos Santos, Emanuel Bruno. “Influence of current pulse profile on metal transfer in pulsed gas metal arc welding.” 2017. Thesis, University of Waterloo. Accessed January 22, 2021.
http://hdl.handle.net/10012/11723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ferreira dos Santos, Emanuel Bruno. “Influence of current pulse profile on metal transfer in pulsed gas metal arc welding.” 2017. Web. 22 Jan 2021.
Vancouver:
Ferreira dos Santos EB. Influence of current pulse profile on metal transfer in pulsed gas metal arc welding. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10012/11723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ferreira dos Santos EB. Influence of current pulse profile on metal transfer in pulsed gas metal arc welding. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/11723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

INP Toulouse
18.
Gosselin, Valentin.
Etude expérimentale de la formation d'un spray à partir d'un film liquide annulaire cisaillé : Experimental study of the spray formation from a sheared annular liquid film.
Degree: Docteur es, Dynamique des fluides, 2019, INP Toulouse
URL: http://www.theses.fr/2019INPT0004
► Un moyen d'accroître l'efficacité et de réduire la pollution dans les domaines du transport et de l'énergie consiste à concevoir des injecteurs de carburant produisant…
(more)
▼ Un moyen d'accroître l'efficacité et de réduire la pollution dans les domaines du transport et de l'énergie consiste à concevoir des injecteurs de carburant produisant une meilleure atomisation. Au cours de cette thèse, des expériences ont été effectuées sur un injecteur airblast souvent utilisé dans les turbines à gaz. Pour réaliser ces expérimentations, un dispositif modèle en configuration annulaire a été créé afin d'étudier le cisaillement d'un film d'eau soumis à un écoulement d'air interne à forte vitesse. La technique d'imagerie rapide par ombroscopie a été utilisée pour analyser le développement du film liquide (fréquence et célérité des ondes) et l'atomisation de la nappe en sortie d'injecteur (modes de rupture). La modification des paramètres d'injection (vitesse des écoulements) a révélé un lien entre la topologie du film liquide et le régime d'atomisation primaire. Finalement, à titre exploratoire, l'influence de la géométrie de l'injecteur (longueur de préfilm) sur le mode d'atomisation primaire a également été mise en évidence
One way to increase efficiency and reduce pollution in the transportation and energy domain is designing fuel injectors with better atomization. In this thesis, experiments were performed on a prefilming airblast atomizer often used in gas turbines. For this purpose, a model device with a cylindrical configuration was created to study the shearing of a film of water subjected to an internal high speed air flow. High speed shadowgraphy technique was used to analyse the development of the liquid film (frequency and wave celerity) and the atomization of the sheet at the injector outlet (breakup mode). The modification of the injection parameters (velocity of flows) revealed a link between the topology of the liquid film and the primary atomization regime. Finally,the influence of the geometry of the injector (prefilming length) about the mode of primary atomization was also highlighted with an exploratory study
Advisors/Committee Members: Bazile, Rudy (thesis director), Ferret, Bernard (thesis director).
Subjects/Keywords: Atomisation; Nappe liquide; Préfilm; Airblast; Imagerie rapide; Atomization; Liquid sheet; Prefilming; Airblast; High speed imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gosselin, V. (2019). Etude expérimentale de la formation d'un spray à partir d'un film liquide annulaire cisaillé : Experimental study of the spray formation from a sheared annular liquid film. (Doctoral Dissertation). INP Toulouse. Retrieved from http://www.theses.fr/2019INPT0004
Chicago Manual of Style (16th Edition):
Gosselin, Valentin. “Etude expérimentale de la formation d'un spray à partir d'un film liquide annulaire cisaillé : Experimental study of the spray formation from a sheared annular liquid film.” 2019. Doctoral Dissertation, INP Toulouse. Accessed January 22, 2021.
http://www.theses.fr/2019INPT0004.
MLA Handbook (7th Edition):
Gosselin, Valentin. “Etude expérimentale de la formation d'un spray à partir d'un film liquide annulaire cisaillé : Experimental study of the spray formation from a sheared annular liquid film.” 2019. Web. 22 Jan 2021.
Vancouver:
Gosselin V. Etude expérimentale de la formation d'un spray à partir d'un film liquide annulaire cisaillé : Experimental study of the spray formation from a sheared annular liquid film. [Internet] [Doctoral dissertation]. INP Toulouse; 2019. [cited 2021 Jan 22].
Available from: http://www.theses.fr/2019INPT0004.
Council of Science Editors:
Gosselin V. Etude expérimentale de la formation d'un spray à partir d'un film liquide annulaire cisaillé : Experimental study of the spray formation from a sheared annular liquid film. [Doctoral Dissertation]. INP Toulouse; 2019. Available from: http://www.theses.fr/2019INPT0004

Lehigh University
19.
Jerwick, Jason Ryan.
Functional High-Speed Optical Coherence Tomography.
Degree: PhD, Electrical Engineering, 2020, Lehigh University
URL: https://preserve.lehigh.edu/etd/5768
Optical coherence tomography (OCT) is a high speed, high resolution, noninvasive imaging technique that has seen applications across many clinical and biological research fields, with a particular focus in ophthalmic, cardiologic and dermatologic imaging.
Advisors/Committee Members: Chao Zhou.
Subjects/Keywords: Compressed Sensing; Elastography; High-Speed Imaging; Optical Coherence Tomography; Electrical and Electronics
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jerwick, J. R. (2020). Functional High-Speed Optical Coherence Tomography. (Doctoral Dissertation). Lehigh University. Retrieved from https://preserve.lehigh.edu/etd/5768
Chicago Manual of Style (16th Edition):
Jerwick, Jason Ryan. “Functional High-Speed Optical Coherence Tomography.” 2020. Doctoral Dissertation, Lehigh University. Accessed January 22, 2021.
https://preserve.lehigh.edu/etd/5768.
MLA Handbook (7th Edition):
Jerwick, Jason Ryan. “Functional High-Speed Optical Coherence Tomography.” 2020. Web. 22 Jan 2021.
Vancouver:
Jerwick JR. Functional High-Speed Optical Coherence Tomography. [Internet] [Doctoral dissertation]. Lehigh University; 2020. [cited 2021 Jan 22].
Available from: https://preserve.lehigh.edu/etd/5768.
Council of Science Editors:
Jerwick JR. Functional High-Speed Optical Coherence Tomography. [Doctoral Dissertation]. Lehigh University; 2020. Available from: https://preserve.lehigh.edu/etd/5768

University of Kentucky
20.
Hamlet, Sean Michael.
COMPARING ACOUSTIC GLOTTAL FEATURE EXTRACTION METHODS WITH SIMULTANEOUSLY RECORDED HIGH-SPEED VIDEO FEATURES FOR CLINICALLY OBTAINED DATA.
Degree: 2012, University of Kentucky
URL: https://uknowledge.uky.edu/ece_etds/12
► Accurate methods for glottal feature extraction include the use of high-speed video imaging (HSVI). There have been previous attempts to extract these features with the…
(more)
▼ Accurate methods for glottal feature extraction include the use of high-speed video imaging (HSVI). There have been previous attempts to extract these features with the acoustic recording. However, none of these methods compare their results with an objective method, such as HSVI. This thesis tests these acoustic methods against a large diverse population of 46 subjects. Two previously studied acoustic methods, as well as one introduced in this thesis, were compared against two video methods, area and displacement for open quotient (OQ) estimation. The area comparison proved to be somewhat ambiguous and challenging due to thresholding effects. The displacement comparison, which is based on glottal edge tracking, proved to be a more robust comparison method than the area. The first acoustic methods OQ estimate had a relatively small average error of 8.90% and the second method had a relatively large average error of -59.05% compared to the displacement OQ. The newly proposed method had a relatively small error of -13.75% when compared to the displacements OQ. There was some success even though there was relatively high error with the acoustic methods, however, they may be utilized to augment the features collected by HSVI for a more accurate glottal feature estimation.
Subjects/Keywords: Linear Prediction; Acoustic Signals; Glottal Features; Inverse Filtering; High-Speed Imaging; Signal Processing
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hamlet, S. M. (2012). COMPARING ACOUSTIC GLOTTAL FEATURE EXTRACTION METHODS WITH SIMULTANEOUSLY RECORDED HIGH-SPEED VIDEO FEATURES FOR CLINICALLY OBTAINED DATA. (Masters Thesis). University of Kentucky. Retrieved from https://uknowledge.uky.edu/ece_etds/12
Chicago Manual of Style (16th Edition):
Hamlet, Sean Michael. “COMPARING ACOUSTIC GLOTTAL FEATURE EXTRACTION METHODS WITH SIMULTANEOUSLY RECORDED HIGH-SPEED VIDEO FEATURES FOR CLINICALLY OBTAINED DATA.” 2012. Masters Thesis, University of Kentucky. Accessed January 22, 2021.
https://uknowledge.uky.edu/ece_etds/12.
MLA Handbook (7th Edition):
Hamlet, Sean Michael. “COMPARING ACOUSTIC GLOTTAL FEATURE EXTRACTION METHODS WITH SIMULTANEOUSLY RECORDED HIGH-SPEED VIDEO FEATURES FOR CLINICALLY OBTAINED DATA.” 2012. Web. 22 Jan 2021.
Vancouver:
Hamlet SM. COMPARING ACOUSTIC GLOTTAL FEATURE EXTRACTION METHODS WITH SIMULTANEOUSLY RECORDED HIGH-SPEED VIDEO FEATURES FOR CLINICALLY OBTAINED DATA. [Internet] [Masters thesis]. University of Kentucky; 2012. [cited 2021 Jan 22].
Available from: https://uknowledge.uky.edu/ece_etds/12.
Council of Science Editors:
Hamlet SM. COMPARING ACOUSTIC GLOTTAL FEATURE EXTRACTION METHODS WITH SIMULTANEOUSLY RECORDED HIGH-SPEED VIDEO FEATURES FOR CLINICALLY OBTAINED DATA. [Masters Thesis]. University of Kentucky; 2012. Available from: https://uknowledge.uky.edu/ece_etds/12

Deakin University
21.
McDermott, Geoffrey Paul.
Determination of antioxidants using chemiluminescence detection.
Degree: 2011, Deakin University
URL: http://hdl.handle.net/10536/DRO/DU:30042598
► Antioxidants are produced within the body or obtained from dietary sources. Their main role is to counter the detrimental effects of free radicals, but they…
(more)
▼ Antioxidants are produced within the body or obtained from dietary sources. Their main role is to counter the detrimental effects of free radicals, but they are also essential for numerous metabolic processes. This thesis describes novel detection methods for the determination of antioxidants in plant based materials and physiological fluids.
Advisors/Committee Members: Barnett, Neil.
Subjects/Keywords: antioxidants; chemiluminescence; high performance liquid chromatography
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
McDermott, G. P. (2011). Determination of antioxidants using chemiluminescence detection. (Thesis). Deakin University. Retrieved from http://hdl.handle.net/10536/DRO/DU:30042598
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):
McDermott, Geoffrey Paul. “Determination of antioxidants using chemiluminescence detection.” 2011. Thesis, Deakin University. Accessed January 22, 2021.
http://hdl.handle.net/10536/DRO/DU:30042598.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
McDermott, Geoffrey Paul. “Determination of antioxidants using chemiluminescence detection.” 2011. Web. 22 Jan 2021.
Vancouver:
McDermott GP. Determination of antioxidants using chemiluminescence detection. [Internet] [Thesis]. Deakin University; 2011. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10536/DRO/DU:30042598.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
McDermott GP. Determination of antioxidants using chemiluminescence detection. [Thesis]. Deakin University; 2011. Available from: http://hdl.handle.net/10536/DRO/DU:30042598
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
22.
Huang, Po-chao.
A High speed 12-bit Digital-to-Analog Converter with the extended encoding scheme.
Degree: Master, Computer Science and Engineering, 2017, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0013117-100446
► In the mobile communication applications, the Digital-to-analog converter (DAC) needs the higher accuracy and speed. However, the operation time is limited by the battery capacity…
(more)
▼ In the mobile communication applications, the Digital-to-analog converter (DAC) needs the higher accuracy and
speed. However, the operation time is limited by the battery capacity of the mobile devices. Increasing
speed and accuracy are the trend of the current DACâs circuit design. In the conventional current source architecture of the
high-
speed applications, the limited dynamic linearity is affected by the excessive number of switches. Therefore, this thesis proposes a new coding method to design a current-steering architecture that the digital-to-analog converter can achieve a
high-
speed operation for different applications. The proposed DAC architecture is composed of an eight-bit thermometer code and a four-bit expanded encoder digital-to-analog converter. It mainly can reduce the number of times of a single switch. Hence, the circuit can achieve a better linearity to improve the dynamic performance.
Finally, the design was designed in TSMC 90nm CMOS process. The sample rate and resolution of the DAC are 1GS/s and 12-bit, respectively. The power consumption is 27.5mW.
Advisors/Committee Members: Ko-Chi Kuo (committee member), Xin-Yu Shih (chair), Shiann-Rong Kuang (chair).
Subjects/Keywords: DAC; high speed; high precision
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huang, P. (2017). A High speed 12-bit Digital-to-Analog Converter with the extended encoding scheme. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0013117-100446
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):
Huang, Po-chao. “A High speed 12-bit Digital-to-Analog Converter with the extended encoding scheme.” 2017. Thesis, NSYSU. Accessed January 22, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0013117-100446.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Huang, Po-chao. “A High speed 12-bit Digital-to-Analog Converter with the extended encoding scheme.” 2017. Web. 22 Jan 2021.
Vancouver:
Huang P. A High speed 12-bit Digital-to-Analog Converter with the extended encoding scheme. [Internet] [Thesis]. NSYSU; 2017. [cited 2021 Jan 22].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0013117-100446.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Huang P. A High speed 12-bit Digital-to-Analog Converter with the extended encoding scheme. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0013117-100446
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Newcastle
23.
Mitra, Subhasish.
Droplet particle interaction in a flowing gas stream.
Degree: PhD, 2016, University of Newcastle
URL: http://hdl.handle.net/1959.13/1315709
► Research Doctorate - Doctor of Philosophy (PhD)
Droplet-particle collision interaction in a flowing gas stream is one of the major phase interaction phenomena in a…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
Droplet-particle collision interaction in a flowing gas stream is one of the major phase interaction phenomena in a wide class of multiphase process applications such as spouted bed coating, fluid catalytic cracking unit, fluid coking process for bitumen upgrade process etc. that govern the process performance to a significant extent. Such interactions are manifestations of complex hydrodynamics involving competing interplay of various forces e.g. viscous, capillary, inertial and gravity coupled with simultaneous heat and mass transport process which involves further complexity of phase change. Depending on the size ratio of the droplet-particle pair, relative velocity, physical properties, temperature difference, surface roughness and hydrophobicity; a number of different outcomes are possible which presumably affect the associated transport phenomena to a significant extent. For instance, inefficient contact of atomized feed droplets and hot catalyst particles adversely affects the desired product yield in a fluid catalytic cracking unit. Motivated by a dearth of knowledge in this field, the present research aims at investigating some of these interaction mechanisms with specific focus on the single droplet-particle system to broaden the mechanistic understandings using both non-invasive optical technique (high speed imaging) and numerical modelling wherever applicable. Based on the droplet-particle size ratio (Δ), there different systems were studied: Δ < 1, Δ > 1 and Δ ~ 1. For Δ < 1 system, normal collision behaviour of different fluids namely water, isopropyl alcohol and acetone was studied on a highly thermally conductive stationary brass particle surface in the temperature ranging from normal atmospheric condition (20 °C) to film boiling regime (250 °C - 350 °C) at different impact velocities (0.34 - 1.67 m/s) of droplets using high speed imaging technique. With increasing impact velocity (Weber number), three distinct outcomes were noted – deposition or wetting behaviour at normal atmospheric condition to nucleate boiling regime and then rebound and disintegration in the film boiling regime. In the impact dynamics, broadly two distinct phases were observed – inertia-dominated spreading or advancing phase and surface tension dominated recoiling or receding phase below disintegration limit and only spreading phase above this limit. Specifically in the film boiling regime, a critical Weber number range was determined wherein the transition from rebound to disintegration regime occurs. Two important parameters were quantified – maximum wetted contact area and droplet-particle contact time that governs the collision induced heat transfer process. Using image analysis, maximum spreading parameter was quantified to characterise the wetted area and correlated with impact Weber numbers using a general functional form. Also an analytical expression was suggested to determine this parameter on spherical surface based on an energy balance approach which showed…
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: droplet; particle; contact time; high speed imaging; thermal imaging; multiphase interaction; thesis by publication; collision model; deposition; breakup; rebound; collision heat transfer; CFD-VOF; image processing; Schlieren imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mitra, S. (2016). Droplet particle interaction in a flowing gas stream. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1315709
Chicago Manual of Style (16th Edition):
Mitra, Subhasish. “Droplet particle interaction in a flowing gas stream.” 2016. Doctoral Dissertation, University of Newcastle. Accessed January 22, 2021.
http://hdl.handle.net/1959.13/1315709.
MLA Handbook (7th Edition):
Mitra, Subhasish. “Droplet particle interaction in a flowing gas stream.” 2016. Web. 22 Jan 2021.
Vancouver:
Mitra S. Droplet particle interaction in a flowing gas stream. [Internet] [Doctoral dissertation]. University of Newcastle; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1959.13/1315709.
Council of Science Editors:
Mitra S. Droplet particle interaction in a flowing gas stream. [Doctoral Dissertation]. University of Newcastle; 2016. Available from: http://hdl.handle.net/1959.13/1315709

Dalhousie University
24.
Kostylev, Ivan.
HIGHLY-RESOLVED TEMPOROSPATIAL SHRINKAGE KINETICS OF
RESIN-BASED COMPOSITES USING LASER INTERFEROMETRY.
Degree: MS, Department of Physics & Atmospheric
Science, 2014, Dalhousie University
URL: http://hdl.handle.net/10222/53779
► Photocurable resin-based composites (RBCs) are commonly used as dental restoratives due to their superior aesthetic quality. An enduring problem is that photocuring RBCs results in…
(more)
▼ Photocurable resin-based composites (RBCs) are
commonly used as dental restoratives due to their superior
aesthetic quality. An enduring problem is that photocuring RBCs
results in polymerization shrinkage that may lead to clinical
failure of the restoration. A novel Michelson interferometer based
approach is developed for accurately measuring shrinkage dynamics
and topography of fast heterogeneously curing RBCs in the bonded
disc geometry. The main components of the apparatus consist of a
Helium-Neon (HeNe) laser and a CCD camera with 122 frames per
second acquisition rate capable of measuring shrinkage rates up to
19.3 m/s with a spatial resolution on the sample of 20.6 m. The
accuracy and reliability of the system were confirmed by comparison
with a photodiode, profilometer, and spherical mirrors. Study on
sample geometry demonstrated that coverslip rigidity affects the
RBC shrinkage kinetics especially for low power inhomogeneous
light-curing unit (LCU) irradiance beam profile. The inhomogeneous
beam profile of a LED-based polywavelength (1 violet and 2 blue
LEDs) LCU was evident in the shrinkage map at short time but
obfuscated at long exposure time. Reproducibility of results and
uncertainty of deflection rates are attributed to LCU power
fluctuation and data acquisition rates, respectively. Autocatalytic
equation fits well to experimental results and suggests a greater
possible maximum shrinkage for lower LCU irradiance. A linear
relationship between the degree of conversion of RBC, measured by a
Fourier Transform Infrared Spectrometer, and the shrinkage was
observed across the full range of measured values. Nevertheless, a
difference in the reaction order parameters derived from the
autocatalytic equation fits to the data for DC and shrinkage is
observed.
Advisors/Committee Members: n/a (external-examiner), Kevin Hewitt (graduate-coordinator), Laurent Kreplak, Kevin Hewitt (thesis-reader), Daniel Labrie, Richard Price (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).
Subjects/Keywords: laser interferometry; photopolymerization; shrinkage; imaging; topography; high speed camera; kinetics; autocatalytic equation; resin based composite; degree of conversion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kostylev, I. (2014). HIGHLY-RESOLVED TEMPOROSPATIAL SHRINKAGE KINETICS OF
RESIN-BASED COMPOSITES USING LASER INTERFEROMETRY. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/53779
Chicago Manual of Style (16th Edition):
Kostylev, Ivan. “HIGHLY-RESOLVED TEMPOROSPATIAL SHRINKAGE KINETICS OF
RESIN-BASED COMPOSITES USING LASER INTERFEROMETRY.” 2014. Masters Thesis, Dalhousie University. Accessed January 22, 2021.
http://hdl.handle.net/10222/53779.
MLA Handbook (7th Edition):
Kostylev, Ivan. “HIGHLY-RESOLVED TEMPOROSPATIAL SHRINKAGE KINETICS OF
RESIN-BASED COMPOSITES USING LASER INTERFEROMETRY.” 2014. Web. 22 Jan 2021.
Vancouver:
Kostylev I. HIGHLY-RESOLVED TEMPOROSPATIAL SHRINKAGE KINETICS OF
RESIN-BASED COMPOSITES USING LASER INTERFEROMETRY. [Internet] [Masters thesis]. Dalhousie University; 2014. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10222/53779.
Council of Science Editors:
Kostylev I. HIGHLY-RESOLVED TEMPOROSPATIAL SHRINKAGE KINETICS OF
RESIN-BASED COMPOSITES USING LASER INTERFEROMETRY. [Masters Thesis]. Dalhousie University; 2014. Available from: http://hdl.handle.net/10222/53779
25.
Decourselle, Thomas.
Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture : Study and modeling of the behavior of droplets of plant protection products on vine leaves by ultra-fast imaging and texture analysis.
Degree: Docteur es, Instrumentation et informatique de l'image, 2013, Université de Bourgogne
URL: http://www.theses.fr/2013DIJOS033
► Dans le contexte actuel de diminution des pollutions d’origine agricole, laréduction des apports d’intrants devient un enjeu primordial. En France, laviticulture est l’activité qui possède…
(more)
▼ Dans le contexte actuel de diminution des pollutions d’origine agricole, laréduction des apports d’intrants devient un enjeu primordial. En France, laviticulture est l’activité qui possède le taux le plus important de traitementsphytosanitaires par unité de surface. Elle représente, à elle seule, 20% de laconsommation annuelle de pesticides. Par conséquent, il est nécessaire d’étudierle devenir des pesticides appliqués afin de réduire les quantités perduesdans l’environnement. Dans le cadre de la réduction d’apport de produitsphytosanitaires dans les vignes, de nombreux travaux ont été effectués sur lamodélisation du comportement d’un spray de gouttelettes et sa répartitionau niveau de la parcelle et de l’air environnant. Cependant, il est égalementimportant de s’intéresser au comportement de la gouttelette directement auniveau de la feuille. Les progrès dans le domaine de l’imagerie et la diminutiondu coût des systèmes ont rendus ces systèmes beaucoup plus attractifs.Le travail de cette thèse consiste en la mise en place d’un système d’imagerierapide qui permet l’observation du comportement à l’impact de gouttelettesrépondant aux conditions de pulvérisation. Les caractéristiques ainsi que lecomportement associé de chaque gouttelette sont extraits grâce à une méthodede suivi d’objets. Une analyse statistique basée sur un nombre représentatifde résultats permet ensuite d’évaluer de manière robuste le devenir d’unegoutte en fonction de ses caractéristiques. Parallèlement, un paramètre décrivantl’état de surface de la feuille est également étudié grâce à l’imagerie : larugosité qui joue un rôle prédominant dans la compréhension des mécanismesd’adhésion
In the domain of vineyard precision spraying research, one of the most importantobjectives is to minimize the volume of phytosanitary products ejected bya sprayer in order to be more environmentally respectful with more effectivevine leaf treatments. Unfortunaltely, even if lot of works have been carriedout at a parcel scale, mainly on losses caused by drift, less works have beencarried out at the leaf scale in order to understand which parameters influencethe spray quality. Since few years, recent improvements in image processing,sensitivity of imaging systems and cost reduction have increased the interestof high-speed imaging techniques. Analyzing the behavior of droplets afterimpact with the leaf thanks to high speed imaging technology is a relevantsolution. By this way, we propose a droplets behavior analyzing process invineyard spraying context based on high-speed acquision system combinedwith image processing techniques. This process allows us to extract dropletsparameters. Therefore, a statistical study is processed in order to determinethe effects of droplets parameters on leaf impact or to predict behavior of asingle droplet. Since this behavior is strongly related to leaf surface, we alsopropose to validate a natural leaf roughness characterization method basedon texture analysis
Advisors/Committee Members: Yang Song, Fan (thesis director), Journaux, Ludovic (thesis director).
Subjects/Keywords: Pulvérisation; Imagerie rapide; Suivi d’objets; Analyse de textures; Spraying; High-speed imaging; Tracking; Texture analysis; 006.3; 006.6; 621.36; 632
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Decourselle, T. (2013). Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture : Study and modeling of the behavior of droplets of plant protection products on vine leaves by ultra-fast imaging and texture analysis. (Doctoral Dissertation). Université de Bourgogne. Retrieved from http://www.theses.fr/2013DIJOS033
Chicago Manual of Style (16th Edition):
Decourselle, Thomas. “Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture : Study and modeling of the behavior of droplets of plant protection products on vine leaves by ultra-fast imaging and texture analysis.” 2013. Doctoral Dissertation, Université de Bourgogne. Accessed January 22, 2021.
http://www.theses.fr/2013DIJOS033.
MLA Handbook (7th Edition):
Decourselle, Thomas. “Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture : Study and modeling of the behavior of droplets of plant protection products on vine leaves by ultra-fast imaging and texture analysis.” 2013. Web. 22 Jan 2021.
Vancouver:
Decourselle T. Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture : Study and modeling of the behavior of droplets of plant protection products on vine leaves by ultra-fast imaging and texture analysis. [Internet] [Doctoral dissertation]. Université de Bourgogne; 2013. [cited 2021 Jan 22].
Available from: http://www.theses.fr/2013DIJOS033.
Council of Science Editors:
Decourselle T. Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture : Study and modeling of the behavior of droplets of plant protection products on vine leaves by ultra-fast imaging and texture analysis. [Doctoral Dissertation]. Université de Bourgogne; 2013. Available from: http://www.theses.fr/2013DIJOS033

Texas A&M University
26.
Johnston, Howard Gregory.
Experimental Effects of Coal-Limestone Mixtures on Dust Dispersion Behind a Moving Shock Wave.
Degree: MS, Mechanical Engineering, 2015, Texas A&M University
URL: http://hdl.handle.net/1969.1/156194
► Secondary dust explosions in coal mines or industrial settings are known to cause greater catastrophic hazards than the coupled primary explosions themselves. The shock waves…
(more)
▼ Secondary dust explosions in coal mines or industrial settings are known to cause greater catastrophic hazards than the coupled primary explosions themselves. The shock waves produced during a primary explosion, which are initiated by inadvertent stimuli in an explosive atmosphere such as methane, lift surrounding coal particles from neighboring areas, and if added in an effort to create an inert mixture, limestone as well. Dust dispersion can influence the severity of a secondary explosion as the particles can ignite from passing shock waves. A shock tube modified to evaluate dust dispersion provides the optical access to characterize the shock-wave/dust-layer interaction. This experimental study characterized the dust dispersion of coal-limestone mixtures and moisture-varied limestone dust as it is likely present in the hazardous environment. The dust rise height was measured with respect to time after the shock passage, where regardless of the sample, initial laminar dust growth rates increased with Mach number. Laminar and unstable regimes were also identified in the data samples.
The moisture-varied limestone samples were tested at three shock Mach numbers, namely Ms = 1.1, 1.23, and 1.4, and the trending data show an average increase of 10% in overall lifting heights and 20% in initial linear growth rates for the moisture-reduced, dried samples as compared to undried samples stored in standard temperature and pressure (STP) conditions. Conceivably, the effective moisture reduction in the samples led to fewer agglomerations and/or reduced densities, influencing the ability of lift forces to act on the particles. In addition, limestone may bond or agglomerate more readily to coal particles when undried, reducing the likelihood of ignition.
The coal-limestone mixture samples were tested at two shock Mach numbers, namely Ms = 1.24 and 1.57, with the 75% coal sample having the largest and 25% coal sample having the smallest combined dust dispersion parameters. Dust dispersion parameters affect how quickly the dust transitions to an unstable interface layer, readily increasing the chances of ignition through increased mixing and dispersion. As the limestone content is increased, dust grows faster, larger, and tend to transition into larger instabilities on the dust-gas boundaries. The highest dust growth rate, shortest transition time, and largest average dust height will affect the ability of the dust sample to ignite. Increasing undried limestone content while maintaining the lowest possible dust dispersion would both help the mixture remain inert and expose less coal particle surface area to the reactive atmosphere. These parameters are fluid-particle dispersion dynamics.
Advisors/Committee Members: Petersen, Eric L (advisor), Mannan, M. Sam (advisor), Kim, Young-Joe (committee member).
Subjects/Keywords: coal dust explosions; coal-limestone dust explosions; shadowgraph; high-speed imaging; dust layer; shock wave; shock tube
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Johnston, H. G. (2015). Experimental Effects of Coal-Limestone Mixtures on Dust Dispersion Behind a Moving Shock Wave. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156194
Chicago Manual of Style (16th Edition):
Johnston, Howard Gregory. “Experimental Effects of Coal-Limestone Mixtures on Dust Dispersion Behind a Moving Shock Wave.” 2015. Masters Thesis, Texas A&M University. Accessed January 22, 2021.
http://hdl.handle.net/1969.1/156194.
MLA Handbook (7th Edition):
Johnston, Howard Gregory. “Experimental Effects of Coal-Limestone Mixtures on Dust Dispersion Behind a Moving Shock Wave.” 2015. Web. 22 Jan 2021.
Vancouver:
Johnston HG. Experimental Effects of Coal-Limestone Mixtures on Dust Dispersion Behind a Moving Shock Wave. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1969.1/156194.
Council of Science Editors:
Johnston HG. Experimental Effects of Coal-Limestone Mixtures on Dust Dispersion Behind a Moving Shock Wave. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/156194

Brigham Young University
27.
Murray, Preston Roylance.
Flow-induced Responses of Normal, Bowed, and Augmented Synthetic Vocal Fold Models.
Degree: MS, 2011, Brigham Young University
URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3872&context=etd
► The voice is the primary mode of communication for humans. Because the voice is so important, voice disorders tend to severely diminish quality of life.…
(more)
▼ The voice is the primary mode of communication for humans. Because the voice is so important, voice disorders tend to severely diminish quality of life. A better understanding of the physics of voice production can help to improve treatment of voice disorders. For this thesis research a self-oscillating synthetic vocal fold model was developed, compared with previous synthetic vocal fold models, and used to explore the physical effects of augmentation injections on vibration dynamics. The research was conducted in two stages. First, four vocal fold models were evaluated by quantifying onset pressure, frequency, maximum glottal gap, flow rate, and medial surface motion. The newly developed model, differentiated from the other models by the inclusion of more layers, adjusted geometry, and an extremely soft superficial lamina propria layer, was included in this study. One of the models, created using MRI-derived geometry, had the most defined mucosal wave. The newly-developed model had the lowest onset pressure, flow rate, and smallest maximum glottal width, and the model motion compared very well with published excised human larynx data. Second, the new model was altered to simulate bowing by decreasing the volume of the body layer relative to that of a normal, unbowed model. Two models with varying degrees of bowing were created and tested while paired with normal models. Pre- and post-injection data (onset pressure, vibration frequency, glottal flow rate, open quotient, and high-speed image sequences) were recorded and compared. General pre- to post-injection trends included decreased onset pressure, glottal flow rate, and open quotient, and increased vibration frequency. Additionally, there was a decrease in mucosal wave velocity and an increase in phase angle. The thesis results are anticipated to aid in better understanding the physical effects of augmentation injections, with the ultimate goal of obtaining more consistent surgical outcomes, and also to contribute to the advancement of voice research through the development of the new synthetic model.
Subjects/Keywords: vocal folds; vocal fold modeling; mucosal wave; high-speed imaging; injection laryngoplasty; larynx; medial surface; augmentation; Preston R. Murray; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Murray, P. R. (2011). Flow-induced Responses of Normal, Bowed, and Augmented Synthetic Vocal Fold Models. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3872&context=etd
Chicago Manual of Style (16th Edition):
Murray, Preston Roylance. “Flow-induced Responses of Normal, Bowed, and Augmented Synthetic Vocal Fold Models.” 2011. Masters Thesis, Brigham Young University. Accessed January 22, 2021.
https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3872&context=etd.
MLA Handbook (7th Edition):
Murray, Preston Roylance. “Flow-induced Responses of Normal, Bowed, and Augmented Synthetic Vocal Fold Models.” 2011. Web. 22 Jan 2021.
Vancouver:
Murray PR. Flow-induced Responses of Normal, Bowed, and Augmented Synthetic Vocal Fold Models. [Internet] [Masters thesis]. Brigham Young University; 2011. [cited 2021 Jan 22].
Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3872&context=etd.
Council of Science Editors:
Murray PR. Flow-induced Responses of Normal, Bowed, and Augmented Synthetic Vocal Fold Models. [Masters Thesis]. Brigham Young University; 2011. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3872&context=etd

University of California – Irvine
28.
Haley, James Cameron.
Long and Short Time Scale Mass Capture Mechanisms in Laser Directed Energy Deposition Additive Manufacturing.
Degree: Materials Science and Engineering, 2019, University of California – Irvine
URL: http://www.escholarship.org/uc/item/3tc66717
► Laser Directed Energy Deposition (L-DED) Additive Manufacturing (AM) offers unprecedented flexibility in direct fabrication of metallic components in a way that can be readily integrated…
(more)
▼ Laser Directed Energy Deposition (L-DED) Additive Manufacturing (AM) offers unprecedented flexibility in direct fabrication of metallic components in a way that can be readily integrated with existing CNC subtractive machining technologies. The core building block of the technology is the melt pool, the dynamic bead of molten material established by the energy equilibrium between incident laser energy and thermal dissipation. While the unique solidification microstructure of the melt pool has attracted intense scrutiny, the mechanisms determining how mass is originally incorporated into the melt pool have been less well studied. In this work, three new tools are applied to the task of broadening the understanding mass capture behaviors. First, over long time scales it was observed that mass capture efficiency evolves over the course of depositing many layers as machine conditions change; a non-empirical model constructed to track this revealed self-stabilizing behavior in working distance in open-loop control systems. Second, on very short time scales, high speed videography was employed to understand what happens at the moment of impact between a feedstock powder particle and the melt pool. It was revealed that particles are captured by surface tension before fully melting. Third, this particle retention time was investigated with numeric simulation to highlight its relationship to particle size, impact velocity, thermal distributions and wettability.
Subjects/Keywords: Materials Science; Additive Manufacturing; Directed Energy Deposition; High speed imaging; Laser Engineered Net Shaping; Particle impact; Wettability
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Haley, J. C. (2019). Long and Short Time Scale Mass Capture Mechanisms in Laser Directed Energy Deposition Additive Manufacturing. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/3tc66717
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):
Haley, James Cameron. “Long and Short Time Scale Mass Capture Mechanisms in Laser Directed Energy Deposition Additive Manufacturing.” 2019. Thesis, University of California – Irvine. Accessed January 22, 2021.
http://www.escholarship.org/uc/item/3tc66717.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Haley, James Cameron. “Long and Short Time Scale Mass Capture Mechanisms in Laser Directed Energy Deposition Additive Manufacturing.” 2019. Web. 22 Jan 2021.
Vancouver:
Haley JC. Long and Short Time Scale Mass Capture Mechanisms in Laser Directed Energy Deposition Additive Manufacturing. [Internet] [Thesis]. University of California – Irvine; 2019. [cited 2021 Jan 22].
Available from: http://www.escholarship.org/uc/item/3tc66717.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Haley JC. Long and Short Time Scale Mass Capture Mechanisms in Laser Directed Energy Deposition Additive Manufacturing. [Thesis]. University of California – Irvine; 2019. Available from: http://www.escholarship.org/uc/item/3tc66717
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

King Abdullah University of Science and Technology
29.
Khaled, Narimane.
High-Speed Imaging of a Water Droplet Impacting a Super Cold Surface.
Degree: 2016, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/618394
► Frost formation is of a major research interest as it can affect many industrial processes. Frost appears as a thin deposit of ice crystals when…
(more)
▼ Frost formation is of a major research interest as it can affect many industrial processes. Frost appears as a thin deposit of ice crystals when the temperature of the surface is below the freezing point of the liquid. The objective of this research is to study icing with hope to propose new anti-icing and deicing methods.
In the beginning of the research, cracking of the ice layer was observed when a deionized water droplet impacts a ?50 °C cooled sphere surface that is in contact with dry ice. To further investigate the cracks occurrence, multiple experiments were conducted. It was observed that the sphere surface temperature and droplet temperature (ranges from 10-80 °C) have no effect on the crack formation. On the other hand, it was observed that formation of a thin layer of frost on the sphere before the drop impact leads the lateral cracking of the ice. Thus, attempts to reproduce the cracks on clean super cold sphere surfaces were made using scratched and sandblasted spheres as well as superhydrophobized and polymer particle coated spheres. Furthermore, innovative methods were tried to initiate the cracks by placing epoxy glue bumps and ice-islands coatings on the surface of the spheres. All of these attempts to reproduce the crack formation without the presence of frost, failed. Nonetheless, the adding of isolated frost on the sphere surfaces always leads to the crack formation.
Generally, frost forms on the small spheres faster than it does on the bigger ones.
Additionally, the cold water droplet produces thicker water and ice layer compared to a hot water droplet; and the smaller the sphere the larger its water and ice layer thicknesses.
Subjects/Keywords: Super Cold; Drop Impact; Dry Ice; Crack on Cold Surface; High Speed Fluid Imaging; Spere Coatings
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Khaled, N. (2016). High-Speed Imaging of a Water Droplet Impacting a Super Cold Surface. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/618394
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):
Khaled, Narimane. “High-Speed Imaging of a Water Droplet Impacting a Super Cold Surface.” 2016. Thesis, King Abdullah University of Science and Technology. Accessed January 22, 2021.
http://hdl.handle.net/10754/618394.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Khaled, Narimane. “High-Speed Imaging of a Water Droplet Impacting a Super Cold Surface.” 2016. Web. 22 Jan 2021.
Vancouver:
Khaled N. High-Speed Imaging of a Water Droplet Impacting a Super Cold Surface. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10754/618394.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Khaled N. High-Speed Imaging of a Water Droplet Impacting a Super Cold Surface. [Thesis]. King Abdullah University of Science and Technology; 2016. Available from: http://hdl.handle.net/10754/618394
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Canterbury
30.
Kabaliuk, Natalia.
Dynamics of Blood Drop Formation and Flight.
Degree: Mechanical Engineering, 2014, University of Canterbury
URL: http://hdl.handle.net/10092/8979
► Violent crimes involving bloodshed may result in the formation of a number of blood drops that move through air and impact onto a surface producing…
(more)
▼ Violent crimes involving bloodshed may result in the formation of a number of blood drops that move through air and impact onto a surface producing a bloodstain pattern. Bloodstain Pattern Analysis (BPA), the analysis of the position, distribution, size and morphology of the stains within the pattern present at a crime scene, may provide information about the events that gave rise to the bloodshed. The location of blood origin, i.e. victim’s position at the moment of wounding and (or) wound location, determination is of major interest to BPA. This study investigated the dynamics of formation and flight of blood drops commonly found at a crime scene (so-called passive, cast-off, impact and gunshot drops) with the aim to facilitate blood origin determination. Features of blood drop formation at passive dripping with correlation to dripping surface characteristics were studied experimentally. A numerical scheme for accurate blood drop flight characteristics modelling, including oscillations, deformation and disintegration, was developed and validated against a number of analytical and experimental cases with special attention to the passive blood drop oscillations and ultimate deformation at terminal velocity, cast-off and impact blood drop deformation and breakup features. This provided an efficient and accurate method for typical blood drop flight reconstruction from the blood origin to impact as well as from the bloodstain location to the possible blood origin. Factors affecting blood drop trajectory and blood origin estimation were studied using the developed scheme.
Subjects/Keywords: Bloodstain Pattern Analysis (BPA); blood origin; bloodstain pattern; drop formation; drop flight; drop trajectory reconstruction; high speed imaging; computer modelling
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share





❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kabaliuk, N. (2014). Dynamics of Blood Drop Formation and Flight. (Thesis). University of Canterbury. Retrieved from http://hdl.handle.net/10092/8979
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):
Kabaliuk, Natalia. “Dynamics of Blood Drop Formation and Flight.” 2014. Thesis, University of Canterbury. Accessed January 22, 2021.
http://hdl.handle.net/10092/8979.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kabaliuk, Natalia. “Dynamics of Blood Drop Formation and Flight.” 2014. Web. 22 Jan 2021.
Vancouver:
Kabaliuk N. Dynamics of Blood Drop Formation and Flight. [Internet] [Thesis]. University of Canterbury; 2014. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10092/8979.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kabaliuk N. Dynamics of Blood Drop Formation and Flight. [Thesis]. University of Canterbury; 2014. Available from: http://hdl.handle.net/10092/8979
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] [3] [4] [5] … [1629] ▶
.