subject:(Active Matrix Flat panel Imager)

NSYSU

1. Jian, Fu-yen. Novel Nonvolatile Memory for System on Panel Applications.

Degree: PhD, Electro-Optical Engineering, 2010, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0413110-033402

► Recently, active matrix flat-panel displays are widely used in consumer electronic products. With increasing popularity of flat-panel displays, market competition becomes more intense and demands… (more)

▼ Recently, active matrix flat-panel displays are widely used in consumer electronic products. With increasing popularity of flat-panel displays, market competition becomes more intense and demands for high performance flat-panel displays are increasing. Low-temperature polysilicon (LTPS) with higher mobility, as well as drive current can integrate electric circuit, such as controllers and memory on glass substrate of display to achieve the purpose of system on panel (SOP). Thus, flat-panel displays can be more compact, while reducing reliability issues and lowering production costs. In this dissertation, we studied the nonvolatile memory for system on panel applications and reducing cost of memory by increasing the memory density or reducing the processing steps. Therefore, we proposed several modes of operation in nonvolatile memory. First, we use channel hot-electron (CHE) to inject electrons into the nitride layer thatâs above source or drain sides of SONOS thin film transistor (TFT). Thus, we can increase the memory density by storing two-bit state in a memory cell. In this study, the two-bit memory effect is clearly observed for devices with a shorter gate length after CHE programming; however, the two-bit memory effect is absent in devices with a longer gate length. The gate-length-dependent two-bit memory effect is related to the location of injected electrons in the nitride layer. When electrons are injected into the nitride layer above the channel, they can create an additional energy barrier in the channel thus increasing the threshold voltage of the device to perform the programming operations. However, if electrons are injected into the depletion region at the P-N junction between the drain and the channel, the energy barrier induced by electrons is not significant when exchanging the source and drain electrodes to measure the memory status, and the program effect is not as significant. When the channel length is shorten, the built-in potential between the source and the channel can be decreased, the energy barrier caused by programmed electrons can affect electrons in the channel and increase the threshold voltage. Therefore, the two-bit memory effect can be seen in devices with the shorter gate length after CHE programming. Secondly, we stored charges in the body of the thin film transistor to make the conventional thin-film transistors become a non-volatile memory. This method does not need a floating gate or a tunneling oxide in the memory cell; therefore the memory cost can be reduced. In this study, we used trap-assisted band-to-band thermionic field emission enhanced by self-heating in TFT to produce electron-hole pairs. The hole will be separated by a vertical field under the gate and be injected into the body of TFT to complete the programming operation. The erasing operation is performed by applying a lateral electric field between the source/drain to remove holes in the body of TFT. Thirdly, we proposed an edge-FN tunneling method to allow SONOS TFT possess not only a pixel switch but also a… Advisors/Committee Members: Ming-Kwei Lee (chair), Ying-Chung Chen (chair), Ting-Chang Chang (committee member), Shoou-Jinn Chang (chair), Ann-Kuo Chu (committee member), Ching-Ting Lee (chair).

Subjects/Keywords: Nonvolatile memory; Active matrix flat-panel displays; System on panel (SOP); Silicon-oxide-nitride-oxide-silicon; Polysilicon thin-film transistors

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APA (6^th Edition):

Jian, F. (2010). Novel Nonvolatile Memory for System on Panel Applications. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0413110-033402

Chicago Manual of Style (16^th Edition):

Jian, Fu-yen. “Novel Nonvolatile Memory for System on Panel Applications.” 2010. Doctoral Dissertation, NSYSU. Accessed January 19, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0413110-033402.

MLA Handbook (7^th Edition):

Jian, Fu-yen. “Novel Nonvolatile Memory for System on Panel Applications.” 2010. Web. 19 Jan 2021.

Vancouver:

Jian F. Novel Nonvolatile Memory for System on Panel Applications. [Internet] [Doctoral dissertation]. NSYSU; 2010. [cited 2021 Jan 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0413110-033402.

Council of Science Editors:

Jian F. Novel Nonvolatile Memory for System on Panel Applications. [Doctoral Dissertation]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0413110-033402

2. Liang, Albert. Investigation of the Performance of Photon Counting Arrays Based on Polycrystalline Silicon Thin-Film Transistors.

Degree: PhD, Biomedical Engineering, 2018, University of Michigan

URL: http://hdl.handle.net/2027.42/144006

► Projection x-ray imaging is commonly employed to visualize internal human anatomy and used to produce diagnostic images. Modern projection imaging is typically performed using an… (more)

▼ Projection x-ray imaging is commonly employed to visualize internal human anatomy and used to produce diagnostic images. Modern projection imaging is typically performed using an active matrix, flat panel imager that is comprised of a converter layer overlying a pixelated array. The images are formed by converting x-ray photons into electrical signals, and then integrating those signals over a frame time – a method referred to as fluence integration. Recently, imagers employing a second method for creating x-ray images – referred to as photon counting – have been developed and used to perform mammographic imaging (a form of projection imaging). Photon counting involves measuring the energy of each interacting x-ray photon and storing digital counts of the number of photons exceeding one or more energy thresholds. Because the imaging information is stored digitally, photon counting imagers are less susceptible to noise than fluence-integrating imagers – which improves image quality and/or decreases the amount of radiation required to acquire an image. Current photon counting mammographic imagers are based on crystalline silicon and are limited in detection area. In order to produce an image, the array is moved in a scanning motion across the object of interest. A photon counting imager with larger detection area would benefit other projection imaging modalities – such as radiography (which produces, for example, chest x-ray images) or fluoroscopy (which is used for non-invasively inserting stents and other medical devices). However, techniques to increase detection area, such as tiling multiple arrays, result in increased imager complexity or cost. For this reason, our group has been exploring the possibility of creating photon counting arrays using a different semiconductor material, referred to as polycrystalline silicon (poly-Si). This material is fabricated using a thin-film process, which allows the economic manufacture of monolithic, large-area arrays and has favorable material properties for creating complex, high speed circuits. Using poly-Si, a set of prototype arrays have been designed and fabricated. The design of the arrays consists of four components: an amplifier, a comparator, a clock generator, and a counter. Several circuit variations were created for each component, and circuit simulations were performed in order to determine energy resolution and count rate values for each variation of each component. For the amplifier component, all circuit variations were determined to have an energy resolution of ~10% when presented with a 70 keV input x-ray photon (a typical photon energy level used in diagnostic imaging). This energy resolution value is comparable to those reported for photon counting imagers fabricated using crystalline silicon. In addition, while count rate values for the amplifier component were roughly one order of magnitude too low for radiographic and fluoroscopic applications (which require count rates on the order of 1 million counts per second per square millimeter… Advisors/Committee Members: Antonuk, Larry E (committee member), Fessler, Jeffrey A (committee member), Goodsitt, Mitchell M (committee member), Lam, Kwok Leung (committee member).

Subjects/Keywords: photon counting; circuit simulation; active matrix flat panel imager; polycrystalline silicon; energy resolution; count rate; Biomedical Engineering; Engineering

…typically performed using an active matrix, flat panel imager that is comprised of a converter… …archiving. In the late 1980s, active matrix flat panel imagers (AMFPIs) were conceived… …pixel, (b) an active pixel with a one-stage amplifier, and (c) an active… …object of interest. A photon counting imager with larger detection area would benefit other… …arrays, result in increased imager complexity or cost. For this reason, our group has been…

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APA (6^th Edition):

Liang, A. (2018). Investigation of the Performance of Photon Counting Arrays Based on Polycrystalline Silicon Thin-Film Transistors. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/144006

Chicago Manual of Style (16^th Edition):

Liang, Albert. “Investigation of the Performance of Photon Counting Arrays Based on Polycrystalline Silicon Thin-Film Transistors.” 2018. Doctoral Dissertation, University of Michigan. Accessed January 19, 2021. http://hdl.handle.net/2027.42/144006.

MLA Handbook (7^th Edition):

Liang, Albert. “Investigation of the Performance of Photon Counting Arrays Based on Polycrystalline Silicon Thin-Film Transistors.” 2018. Web. 19 Jan 2021.

Vancouver:

Liang A. Investigation of the Performance of Photon Counting Arrays Based on Polycrystalline Silicon Thin-Film Transistors. [Internet] [Doctoral dissertation]. University of Michigan; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2027.42/144006.

Council of Science Editors:

Liang A. Investigation of the Performance of Photon Counting Arrays Based on Polycrystalline Silicon Thin-Film Transistors. [Doctoral Dissertation]. University of Michigan; 2018. Available from: http://hdl.handle.net/2027.42/144006

3. Wang, Yi. High Detective Quantum Efficiency Electronic Portal Imaging Devices Based on Segmented Crystalline Scintillators and Mercuric Iodide Photoconductors.

Degree: PhD, Biomedical Engineering, 2009, University of Michigan

URL: http://hdl.handle.net/2027.42/63728

► Electronic portal imaging devices (EPIDs) based on active matrix, flat-panel imagers (AMFPIs) have been widely used for patient set-up verification in radiotherapy, and are being… (more)

▼ Electronic portal imaging devices (EPIDs) based on active matrix, flat-panel imagers (AMFPIs) have been widely used for patient set-up verification in radiotherapy, and are being investigated for megavoltage (MV) cone-beam computed tomography (CBCT). However, the performance of conventional AMFPI-based EPIDs is limited by their relatively low detective quantum efficiency (DQE) at radiotherapy energies, ~1% for 6 MV X rays. Consequently, MV CBCT carried out with these inefficient EPIDs requires impractically high doses to achieve soft-tissue visualization. In order to significantly improve DQE, this research work examined thick mercuric iodide (HgI2) photoconductors in the form of particle in binder (PIB) and thick, segmented scintillators consisting of 2D matrices of scintillating crystals separated by septal walls. Through simulation of radiation transport, quantum efficiency (QE), modulation transfer function (MTF) and DQE were studied as a function of the thickness of PIB-HgI2 photoconductors. Simulations of radiation and optical transport were carried out to investigate how various geometric and optical properties affect the DQE for segmented CsI:Tl and BGO scintillators. Four prototype EPIDs, employing three CsI:Tl scintillators (11.4, 25.6 and 40.0 mm thick) and one BGO scintillator (11.3 mm thick), were evaluated using a 6 MV photon beam. Finally, the potential MV CBCT performance provided by segmented scintillators was investigated by simulation of radiation transport. Compared to conventional EPIDs, PIB-HgI2 photoconductors up to 6 mm thick have the potential to provide up to a factor of ~5 improvement in DQE. Segmented CsI:Tl and BGO scintillators up to 40 mm thick can provide DQE improvement of up to a factor of ~29 and 42, respectively, through optimization of optical properties. The three CsI:Tl prototypes demonstrated DQE improvement of up to a factor of ~25 at low spatial frequencies, while the BGO prototype exhibited an improvement of a factor of ~20 at zero frequency and over a factor of ~10 at the Nyquist frequency. The simulation results indicate that CsI:Tl and BGO scintillators up to 40 mm thick can provide dose reduction for MV CBCT of up to a factor of ~51 and 59, respectively, creating the possibility of providing soft-tissue visualization at clinically acceptable doses. Advisors/Committee Members: Antonuk, Larry E. (committee member), Rogers, W. Leslie (committee member), Clarke, Roy (committee member), Clinthorne, Neal H. (committee member).

Subjects/Keywords: Active Matrix, Flat-panel Imager; Electronic Portal Imaging Devices; Megavoltage Cone-beam CT; Segmented Crystalline Scintillators;

…Absorbed energy distribution AMFPI Active matrix, flat panel imager a-Si:H hydrogenated… …megavoltage active matrix, flat-panel imagers (AMFPIs) simulated in this study. Each… …flat-panel imager (AMFPI) technology. This work is motivated by the strong desire… …high-efficiency electronic portal imaging devices (EPIDs) based on active matrix… …controls the image acquisition, extracts signal from the flat-panel array and converts the analog…

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APA (6^th Edition):

Wang, Y. (2009). High Detective Quantum Efficiency Electronic Portal Imaging Devices Based on Segmented Crystalline Scintillators and Mercuric Iodide Photoconductors. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/63728

Chicago Manual of Style (16^th Edition):

Wang, Yi. “High Detective Quantum Efficiency Electronic Portal Imaging Devices Based on Segmented Crystalline Scintillators and Mercuric Iodide Photoconductors.” 2009. Doctoral Dissertation, University of Michigan. Accessed January 19, 2021. http://hdl.handle.net/2027.42/63728.

MLA Handbook (7^th Edition):

Wang, Yi. “High Detective Quantum Efficiency Electronic Portal Imaging Devices Based on Segmented Crystalline Scintillators and Mercuric Iodide Photoconductors.” 2009. Web. 19 Jan 2021.

Vancouver:

Wang Y. High Detective Quantum Efficiency Electronic Portal Imaging Devices Based on Segmented Crystalline Scintillators and Mercuric Iodide Photoconductors. [Internet] [Doctoral dissertation]. University of Michigan; 2009. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2027.42/63728.

Council of Science Editors:

Wang Y. High Detective Quantum Efficiency Electronic Portal Imaging Devices Based on Segmented Crystalline Scintillators and Mercuric Iodide Photoconductors. [Doctoral Dissertation]. University of Michigan; 2009. Available from: http://hdl.handle.net/2027.42/63728

University of Waterloo

4. Shafique, Umar. Organic Semiconductor Detector for Large Area Digital Imaging.

Degree: 2014, University of Waterloo

URL: http://hdl.handle.net/10012/8428

► Organic semiconductor technology has gained attention in both the sensor and display markets due to its low cost and simple fabrication techniques. The ability to… (more)

Subjects/Keywords: Low Cost Large Area Digital Imaging; Flexible Indirect X-ray Digital Imager; Organic Semiconductor Flat Panel Digital Imager; Digital Imager on Plastic Substrate; Organic Semiconductor Large Area Digital Imager; Organic Semiconductor Photodetector; Lateral Photodetector; Interface Layer; Low Dark Current; Lateral Multilayer Photodetector; Solution Processed; Photodetectors

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APA (6^th Edition):

Shafique, U. (2014). Organic Semiconductor Detector for Large Area Digital Imaging. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/8428

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shafique, Umar. “Organic Semiconductor Detector for Large Area Digital Imaging.” 2014. Thesis, University of Waterloo. Accessed January 19, 2021. http://hdl.handle.net/10012/8428.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shafique, Umar. “Organic Semiconductor Detector for Large Area Digital Imaging.” 2014. Web. 19 Jan 2021.

Vancouver:

Shafique U. Organic Semiconductor Detector for Large Area Digital Imaging. [Internet] [Thesis]. University of Waterloo; 2014. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10012/8428.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shafique U. Organic Semiconductor Detector for Large Area Digital Imaging. [Thesis]. University of Waterloo; 2014. Available from: http://hdl.handle.net/10012/8428

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan

5. Sawant, Amit. High quantum efficiency segmented detectors for megavoltage x -ray imaging using indirect detection active matrix flat panel imagers.

Degree: PhD, Biomedical engineering, 2006, University of Michigan

URL: http://hdl.handle.net/2027.42/125874

► Electronic portal imaging devices (EPIDs) based on indirect-detection, active matrix flat panel imagers (AMFPIs) have become the technology of choice for geometric verification of patient… (more)

▼ Electronic portal imaging devices (EPIDs) based on indirect-detection, active matrix flat panel imagers (AMFPIs) have become the technology of choice for geometric verification of patient localization and dose delivery in external beam radiotherapy. However, the imaging performance of current AMFPI EPIDs is severely limited by the fact that these devices are based on relatively thin, powdered-phosphor screens that make use of only ∼2% of the incident radiation. This work reports on the investigation of a highly efficient form of EPID based on a 2D matrix of thick, optically-isolated, scintillating elements that are dimensionally matched to the pixels of an underlying active matrix array. Two types of such segmented detector designs were explored, segmented phosphors and segmented crystals. Theoretical calculations based on cascaded systems modeling and Monte Carlo simulations were performed to estimate the upper limits of imaging performance, as quantified by the frequency-dependent detective quantum efficiency (DQE), for a variety of detector configurations. Engineering prototypes of segmented phosphor and crystal detectors were fabricated and empirical characterization of imagers incorporating these detectors was performed to determine x-ray sensitivity, modulation transfer function, noise power spectrum, and DQE under radiotherapy imaging conditions. Segmented phosphor-based imagers achieved ∼3 times higher x-ray quantum efficiency compared to a conventional EPID, while exhibiting comparable MTF and zero-frequency DQE. However, the DQE performance of these prototype imagers at higher spatial frequencies was significantly lower than the conventional imager. In the case of segmented crystals, a prototype based on a 40 mm thick CsI(Tl) detector, corresponding to a quantum efficiency of ∼55%, exhibited significantly superior DQE compared to the conventional imager across all spatial frequencies, with a zero-frequency DQE of ∼22% (compared to ∼1% for the conventional imager). Furthermore, Monte Carlo-based theoretical calculations indicate that, with further optimization, segmented crystal-based imagers could achieve DQE values up to 50%. It is anticipated that the realization of such very high-DQE megavoltage imagers would enable the visualization of soft tissue structures at very low doses in megavoltage tomographic and projection imaging – a highly desirable goal for modern, image-guided radiotherapy. Advisors/Committee Members: Antonuk, Larry E. (advisor).

Subjects/Keywords: Active; Detection; Flat Panel Imagers; High; Indirect; Matrix; Megavoltage X-ray Imaging; Quantum Efficiency; Segmented Detectors; Using

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APA (6^th Edition):

Sawant, A. (2006). High quantum efficiency segmented detectors for megavoltage x -ray imaging using indirect detection active matrix flat panel imagers. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/125874

Chicago Manual of Style (16^th Edition):

Sawant, Amit. “High quantum efficiency segmented detectors for megavoltage x -ray imaging using indirect detection active matrix flat panel imagers.” 2006. Doctoral Dissertation, University of Michigan. Accessed January 19, 2021. http://hdl.handle.net/2027.42/125874.

MLA Handbook (7^th Edition):

Sawant, Amit. “High quantum efficiency segmented detectors for megavoltage x -ray imaging using indirect detection active matrix flat panel imagers.” 2006. Web. 19 Jan 2021.

Vancouver:

Sawant A. High quantum efficiency segmented detectors for megavoltage x -ray imaging using indirect detection active matrix flat panel imagers. [Internet] [Doctoral dissertation]. University of Michigan; 2006. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2027.42/125874.

Council of Science Editors:

Sawant A. High quantum efficiency segmented detectors for megavoltage x -ray imaging using indirect detection active matrix flat panel imagers. [Doctoral Dissertation]. University of Michigan; 2006. Available from: http://hdl.handle.net/2027.42/125874

6. Liu, Langechuan. Design Optimization Studies for Active Matrix Flat Panel Imagers Based on Segmented Crystalline Scintillators for Radiotherapy Imaging.

Degree: PhD, Physics, 2015, University of Michigan

URL: http://hdl.handle.net/2027.42/111394

► In this dissertation, a series of theoretical studies were performed using Monte Carlo simulation to optimize the design of active matrix flat panel imagers (AMFPIs)… (more)

▼ In this dissertation, a series of theoretical studies were performed using Monte Carlo simulation to optimize the design of active matrix flat panel imagers (AMFPIs) based on segmented scintillators for radiotherapy imaging. The influence of imager design specifications (such as use of a focused geometry, as well as the physical size and optical properties of scintillator elements) on imaging performance at megavoltage (MV) energies has been systematically investigated. The first study, involving simulation of radiation transport only, examined focused segmented scintillators as a potential solution to counter the detrimental effect of beam divergence. A focused planar geometry was found to effectively eliminate degradation in spatial resolution and detective quantum efficiency due to beam divergence, and to achieve uniform imaging performance across the entire detection area for thick, large-area, segmented scintillators. The second study, which involved simulation of both radiation and optical transport using a novel hybrid modeling technique, was performed to examine the influence of optical effects on the imaging performance of segmented scintillators. Based on the theoretical examination of various scintillator designs, an optimization map, which takes into account contrast-to-noise ratio and spatial resolution performance, was generated to guide decision-making in scintillator design. The final study explored the possibility of extending the clinical application of thick, segmented scintillators to include kilovoltage (kV) imaging using an extended hybrid modeling technique. A methodology was presented for identifying the most favorable design of a dual energy imager based on segmented scintillators. Such a design maintains the desirably high level of imaging performance at MV energies made possible by thick, segmented scintillators, while helping to provide performance comparable to that of commercial imagers at kV energies. The studies presented in this dissertation, which build upon the results of earlier empirical and theoretical characterizations of engineering prototypes, provide valuable insight for the design of future prototypes. It is anticipated that, through careful design assisted by theoretical modeling and empirical measurements, AMFPIs based on segmented scintillators can provide significantly improved performance compared to that of existing imagers in the treatment room, thereby increasing the clinical utility of in-room kV and MV imaging. Advisors/Committee Members: Antonuk, Larry E. (committee member), Balter, James M. (committee member), Becchetti Jr., Frederick D. (committee member), Gull, Emanuel (committee member), Kurdak, Cagliyan (committee member).

Subjects/Keywords: active matrix flat panel imagers; Monte Carlo simulation; segmented scintillators; medical imaging; Physics; Science

…active matrix flat-panel imager," Med. Phys. 28, 2538-2550 (2001); Med. Phys. 33… …perform such imaging are typically based on the technology of active matrix flat-panel imagers… …x28;2009). L. E. Antonuk, "a-Si:H TFT-based active matrix flat-panel imagers for… …signal and noise performance of active matrix, flat-panel imagers for diagnostic x-ray… …prototype flat-panel imager for mammography," Med. Phys. 34, 315-327 (2007)…

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APA (6^th Edition):

Liu, L. (2015). Design Optimization Studies for Active Matrix Flat Panel Imagers Based on Segmented Crystalline Scintillators for Radiotherapy Imaging. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/111394

Chicago Manual of Style (16^th Edition):

Liu, Langechuan. “Design Optimization Studies for Active Matrix Flat Panel Imagers Based on Segmented Crystalline Scintillators for Radiotherapy Imaging.” 2015. Doctoral Dissertation, University of Michigan. Accessed January 19, 2021. http://hdl.handle.net/2027.42/111394.

MLA Handbook (7^th Edition):

Liu, Langechuan. “Design Optimization Studies for Active Matrix Flat Panel Imagers Based on Segmented Crystalline Scintillators for Radiotherapy Imaging.” 2015. Web. 19 Jan 2021.

Vancouver:

Liu L. Design Optimization Studies for Active Matrix Flat Panel Imagers Based on Segmented Crystalline Scintillators for Radiotherapy Imaging. [Internet] [Doctoral dissertation]. University of Michigan; 2015. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2027.42/111394.

Council of Science Editors:

Liu L. Design Optimization Studies for Active Matrix Flat Panel Imagers Based on Segmented Crystalline Scintillators for Radiotherapy Imaging. [Doctoral Dissertation]. University of Michigan; 2015. Available from: http://hdl.handle.net/2027.42/111394

University of Michigan

7. Jee, Kyung-Wook. Theoretical and empirical system performance of active matrix flat -panel imagers.

Degree: PhD, Biomedical engineering, 2002, University of Michigan

URL: http://hdl.handle.net/2027.42/132166

► Active matrix flat-panel imagers (AMFPIs) are large-area, digital x-ray imaging systems incorporating a thin-film-based flat-panel array. While such flat-panel imagers offer numerous advantages over other… (more)

Subjects/Keywords: Active Matrix; Digital X-ray Imaging; Empirical; Flat-panel Imagers; Quantum Efficiency; System Performance; Theoretical

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jee, K. (2002). Theoretical and empirical system performance of active matrix flat -panel imagers. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/132166

Chicago Manual of Style (16^th Edition):

Jee, Kyung-Wook. “Theoretical and empirical system performance of active matrix flat -panel imagers.” 2002. Doctoral Dissertation, University of Michigan. Accessed January 19, 2021. http://hdl.handle.net/2027.42/132166.

MLA Handbook (7^th Edition):

Jee, Kyung-Wook. “Theoretical and empirical system performance of active matrix flat -panel imagers.” 2002. Web. 19 Jan 2021.

Vancouver:

Jee K. Theoretical and empirical system performance of active matrix flat -panel imagers. [Internet] [Doctoral dissertation]. University of Michigan; 2002. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2027.42/132166.

Council of Science Editors:

Jee K. Theoretical and empirical system performance of active matrix flat -panel imagers. [Doctoral Dissertation]. University of Michigan; 2002. Available from: http://hdl.handle.net/2027.42/132166

University of Toronto

8. Wronski, Maciej. Development of a Flat Panel Detector with Avalanche Gain for Interventional Radiology.

Degree: 2009, University of Toronto

URL: http://hdl.handle.net/1807/19249

►

A number of interventional procedures such as cardiac catheterization, angiography and the deployment of endovascular devices are routinely performed using x-ray fluoroscopy. To minimize the… (more)

▼

A number of interventional procedures such as cardiac catheterization, angiography and the deployment of endovascular devices are routinely performed using x-ray fluoroscopy. To minimize the patient’s exposure to ionizing radiation, each fluoroscopic image is acquired using a very low x-ray exposure (~ 1 uR at the detector). At such an exposure, most semiconductor-based digital flat panel detectors (FPD) are not x-ray quantum noise limited (QNL) due to the presence of electronic noise which substantially degrades their imaging performance. The goal of this thesis was to investigate how a FPD based on amorphous selenium (a-Se) with internal avalanche multiplication gain could be used for QNL fluoroscopic imaging at the lowest clinical exposures while satisfying all of the requirements of a FPD for interventional radiology. Towards this end, it was first determined whether a-Se can reliably provide avalanche multiplication gain in the solid-state. An experimental method was developed which enabled the application of sufficiently large electric field strengths across the a-Se. This method resulted in avalanche gains as high as 10000 at an applied field of 105 V/um using optical excitation. This was the first time such high avalanche gains have been reported in a solid-state detector based on an amorphous material. Secondly, it was investigated how the solid-state a-Se avalanche detector could be used to image X-rays at diagnostic radiographic energies (~ 75 kVp). A dual-layered direct-conversion FPD architecture was proposed. It consisted of an x-ray drift region and a charge avalanche multiplication region and was found to eliminate depth-dependent gain fluctuation noise. It was shown that electric field strength non-uniformities in the a-Se do not degrade the detective quantum efficiency (DQE). Lastly, it was determined whether the solid-state a-Se avalanche detector satisfies all of the requirements of interventional radiology. Experimental results have shown that the total noise produced by the detector is negligible and that QNL operation at the lowest fluoroscopic exposures is indeed possible without any adverse effects occurring at much larger radiographic exposures. In conclusion, no fundamental obstacles were found preventing the use of avalanche a-Se in next-generation solid-state QNL FPDs for use in interventional radiology.

PhD

Advisors/Committee Members: Rowlands, John A., Medical Biophysics.

Subjects/Keywords: interventional radiology; flat panel detector; flat panel imager; avalanche multiplication; amorphous selenium; fluoroscopy; 0760; 0541

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APA (6^th Edition):

Wronski, M. (2009). Development of a Flat Panel Detector with Avalanche Gain for Interventional Radiology. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/19249

Chicago Manual of Style (16^th Edition):

Wronski, Maciej. “Development of a Flat Panel Detector with Avalanche Gain for Interventional Radiology.” 2009. Doctoral Dissertation, University of Toronto. Accessed January 19, 2021. http://hdl.handle.net/1807/19249.

MLA Handbook (7^th Edition):

Wronski, Maciej. “Development of a Flat Panel Detector with Avalanche Gain for Interventional Radiology.” 2009. Web. 19 Jan 2021.

Vancouver:

Wronski M. Development of a Flat Panel Detector with Avalanche Gain for Interventional Radiology. [Internet] [Doctoral dissertation]. University of Toronto; 2009. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1807/19249.

Council of Science Editors:

Wronski M. Development of a Flat Panel Detector with Avalanche Gain for Interventional Radiology. [Doctoral Dissertation]. University of Toronto; 2009. Available from: http://hdl.handle.net/1807/19249

University of Saskatchewan

9. Pachai Chettiar Sadasivam, Kalaivani 1982-. X-RAY DOSE DEPENDENCE OF DARK CURRENT IN AMORPHOUS SELENIUM-ALLOY X-RAY PHOTOCONDUCTORS.

Degree: 2016, University of Saskatchewan

URL: http://hdl.handle.net/10388/7521

► The dark current is an important characteristic of a photoconductive X-ray detector, and can impact the dynamic range of the detector and its detective quantum… (more)

▼ The dark current is an important characteristic of a photoconductive X-ray detector, and can impact the dynamic range of the detector and its detective quantum efficiency. It is therefore essential that the dark current and its behavior with time and x-ray irradiation are well characterized and understood in amorphous selenium (a-Se) X-ray detectors for the future enhancement of these detectors. Throughout the course of this work, the dark current in practical a-Se multilayer photoconductors were studied as function of time and x-ray dose delivered to the detector material. The dark current in these multilayer structures has been measured as a function of different rest time periods, sample structure, single X-ray irradiation on the sample and multiple irradiation on the sample. Experiments were performed by resting the sample in dark for a period of time (24 hours) and then samples were exposed to X-ray radiation. It has been observed that most of the trapped charge carriers in the bulk of the material are discharged after resting the sample in dark for 24 hours. It was observed that multilayer sample structures p-i-n and n-i-p exhibit much less dark current compared to other samples with single layer and double layer structures, that is, i-layer only, n-i and p-i structures. The experiments support that the dark current is controlled by injection of charge carriers from contacts. Single X-ray irradiation and multiple irradiation experiments were performed on multilayer a-Se photoconductors at a dose rate of 0.51 Gy s-1 with an exposure duration of 3 s. Samples were exposed to single irradiation at 100 s and 400 s. The dark current following the photocurrent was recorded. Multiple irradiation experiments were also performed on these multilayer samples. With different reverse bias voltages, samples were irradiated 10 times from 200s to 2000s. It was found that the dark current tends to increase with repeated X-ray irradiation but the increase depends on the applied reverse bias; the increase is negligible at a field of 10 V μm-1. After the cessation of the irradiation, the dark current decays and tends to reach a steady state value at t = 4000s. After 24 hr of resting in the dark, the dark current was nearly as low as the original dark current before the X-ray irradiation Advisors/Committee Members: Kasap, Safa, Wahid, Khan, Bradley, Michael, Dinh, Anh.

Subjects/Keywords: Selenium Flat panel detector; Photoconductor

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pachai Chettiar Sadasivam, K. 1. (2016). X-RAY DOSE DEPENDENCE OF DARK CURRENT IN AMORPHOUS SELENIUM-ALLOY X-RAY PHOTOCONDUCTORS. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7521

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pachai Chettiar Sadasivam, Kalaivani 1982-. “X-RAY DOSE DEPENDENCE OF DARK CURRENT IN AMORPHOUS SELENIUM-ALLOY X-RAY PHOTOCONDUCTORS.” 2016. Thesis, University of Saskatchewan. Accessed January 19, 2021. http://hdl.handle.net/10388/7521.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pachai Chettiar Sadasivam, Kalaivani 1982-. “X-RAY DOSE DEPENDENCE OF DARK CURRENT IN AMORPHOUS SELENIUM-ALLOY X-RAY PHOTOCONDUCTORS.” 2016. Web. 19 Jan 2021.

Vancouver:

Pachai Chettiar Sadasivam K1. X-RAY DOSE DEPENDENCE OF DARK CURRENT IN AMORPHOUS SELENIUM-ALLOY X-RAY PHOTOCONDUCTORS. [Internet] [Thesis]. University of Saskatchewan; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10388/7521.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pachai Chettiar Sadasivam K1. X-RAY DOSE DEPENDENCE OF DARK CURRENT IN AMORPHOUS SELENIUM-ALLOY X-RAY PHOTOCONDUCTORS. [Thesis]. University of Saskatchewan; 2016. Available from: http://hdl.handle.net/10388/7521

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo

10. Lai, Jackson. Active Matrix Flat Panel Bio-Medical X-ray Imagers.

Degree: 2008, University of Waterloo

URL: http://hdl.handle.net/10012/3566

► This work investigates the design, system integration, optimization, and evaluation of amorphous silicon (a-Si:H) active matrix flat panel imagers (AMFPI) for bio-medical applications. Here, two… (more)

Subjects/Keywords: X-ray imaging; Active Matrix Panel; Amorphous Silicon Technology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lai, J. (2008). Active Matrix Flat Panel Bio-Medical X-ray Imagers. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/3566

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lai, Jackson. “Active Matrix Flat Panel Bio-Medical X-ray Imagers.” 2008. Thesis, University of Waterloo. Accessed January 19, 2021. http://hdl.handle.net/10012/3566.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lai, Jackson. “Active Matrix Flat Panel Bio-Medical X-ray Imagers.” 2008. Web. 19 Jan 2021.

Vancouver:

Lai J. Active Matrix Flat Panel Bio-Medical X-ray Imagers. [Internet] [Thesis]. University of Waterloo; 2008. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10012/3566.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lai J. Active Matrix Flat Panel Bio-Medical X-ray Imagers. [Thesis]. University of Waterloo; 2008. Available from: http://hdl.handle.net/10012/3566

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. Arai, Toshiaki. High Performance TFT Technologies for the AM-OLED Display Manufacturing : 有機ELディスプレイの生産に向けた高性能TFT技術; ユウキ EL ディスプレイノセイサンニムケタコウセイノウ TFT ギジュツ.

Degree: 博士(工学), 2016, Nara Institute of Science and Technology / 奈良先端科学技術大学院大学

URL: http://hdl.handle.net/10061/11336

Subjects/Keywords: active matrix

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APA (6^th Edition):

Arai, T. (2016). High Performance TFT Technologies for the AM-OLED Display Manufacturing : 有機ELディスプレイの生産に向けた高性能TFT技術; ユウキ EL ディスプレイノセイサンニムケタコウセイノウ TFT ギジュツ. (Thesis). Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10061/11336

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Arai, Toshiaki. “High Performance TFT Technologies for the AM-OLED Display Manufacturing : 有機ELディスプレイの生産に向けた高性能TFT技術; ユウキ EL ディスプレイノセイサンニムケタコウセイノウ TFT ギジュツ.” 2016. Thesis, Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Accessed January 19, 2021. http://hdl.handle.net/10061/11336.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Arai, Toshiaki. “High Performance TFT Technologies for the AM-OLED Display Manufacturing : 有機ELディスプレイの生産に向けた高性能TFT技術; ユウキ EL ディスプレイノセイサンニムケタコウセイノウ TFT ギジュツ.” 2016. Web. 19 Jan 2021.

Vancouver:

Arai T. High Performance TFT Technologies for the AM-OLED Display Manufacturing : 有機ELディスプレイの生産に向けた高性能TFT技術; ユウキ EL ディスプレイノセイサンニムケタコウセイノウ TFT ギジュツ. [Internet] [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10061/11336.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Arai T. High Performance TFT Technologies for the AM-OLED Display Manufacturing : 有機ELディスプレイの生産に向けた高性能TFT技術; ユウキ EL ディスプレイノセイサンニムケタコウセイノウ TFT ギジュツ. [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; 2016. Available from: http://hdl.handle.net/10061/11336

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Καραΐσκου, Ανδριάνα. Βελτιστοποίηση παραμέτρων ποιότητας εικόνας και δοσιμετρίας στην επεμβατική στεφανιογραφία με χρήση επίπεδων ανιχνευτών ενεργού μήτρας (flat panel detectors).

Degree: 2008, University of Patras

URL: http://nemertes.lis.upatras.gr/jspui/handle/10889/1257

► Η διπλωματική αυτή εργασία ξεκινά με μια σύντομη αναφορά, στο κεφάλαιο 1, στις εξελίξεις που αφορούν τους διάφορους τρόπους ανίχνευσης της ακτινοβολίας, μετά από την… (more)

▼ Η διπλωματική αυτή εργασία ξεκινά με μια σύντομη αναφορά, στο κεφάλαιο 1, στις εξελίξεις που αφορούν τους διάφορους τρόπους ανίχνευσης της ακτινοβολίας, μετά από την αλληλεπίδρασή τους με το σώμα, και στην τεχνολογία απόκτησης ακτινοδιαγνωστικών εικόνων μέχρι την εισαγωγή της ψηφιακής απεικόνισης. Αναφέρεται, επίσης, η μετάβαση από το σύστημα φθορίζουσας οθόνης-φιλμ στο σύστημα του ενισχυτή εικόνας-tv monitor, στο σύστημα CCDs-tv camera και από εκεί στα συστήματα των επίπεδων ανιχνευτών. Στη συνέχεια, παρουσιάζονται τα πλεονεκτήματα της ψηφιακής απεικόνισης και πώς αυτά οδήγησαν στα σύγχρονα ψηφιακά συστήματα ακτινοδιαγνωστικής. Μετά την περιγραφή των συστημάτων αυτών, ακολουθεί η κατηγοριοποίησή τους ανάλογα με την τεχνολογία ανίχνευσης και πιο συγκεκριμένα ανάλογα με το σχήμα του ανιχνευτή, τον τύπο του συστήματος ανίχνευσης και τον τρόπο ανίχνευσης. Το κεφάλαιο 2 αφορά κυρίως τους επίπεδους ανιχνευτές. Αφού παρουσιάζεται η διαδικασία ανάγνωσης σε πίνακα ενεργού μήτρας, αναλύονται οι αρχές άμεσης και έμμεσης ανίχνευσης και οι παράμετροι που χαρακτηρίζουν την απόδοση ενός επίπεδου ανιχνευτή. Ολοκληρώνοτας το κεφάλαιο αυτό, γίνεται σύγκριση μεταξύ των δύο προαναφερθέντων επίπεδων ανιχνευτών, σύγκριση μεταξύ των ανιχνευτών έμμεσης ανίχνευσης, που χρησιμοποιούνται σε κλινικές εφαρμογές, και του ενισχυτή εικόνας, που τείνει να αντικατασταθεί σχεδόν σε όλα τα σύγχρονα μηχανήματα, και, τέλος, αναφορά σε διάφορες εξελίξεις πάνω στην τεχνολογία των επίπεδων ανιχνευτών. Τα συστήματα των επίπεδων ανιχνευτών εφαρμόζονται ήδη σε μια μεγάλη γκάμα ακτινοδιαγνωστικών συστημάτων, στα οποία πραγματοποιούνται εξετάσεις, όχι μόνο διάγνωσης, αλλά και θεραπείας. Εξετάσεις όπως η αγγειογραφία, η ψηφιακή αφαιρετική αγγειογραφία (DSA), στεφανιογραφία και αγγειοπλαστική περιγράφονται στο κεφάλαιο 3. Εκτός, όμως, από τα οφέλη που προκύπτουν από τις παραπάνω διαδικασίες, είναι πιθανό να προκληθούν και βλαβερές συνέπειες από την έκθεση του ασθενούς στις ακτίνες Χ. Αφού περιγραφούν τα ντετερμινιστικά και στοχαστικά αποτελέσματα των ακτινοβολιών στον άνθρωπο, αναφέρονται κάποιες δοσιμετρικές έννοιες και κάποιες συναρτησιακές σχέσεις μεταξύ τους, που σχετίζονται με τα παραπάνω αποτελέσματα και την πρόληψή τους. Η παρούσα εργασία, συνεχίζεται με το ειδικό μέρος, στο οποίο γίνεται, αρχικά, στο κεφάλαιο 4, μία σύντομη περιγραφή του ψηφιακού συστήματος στεφανιογραφίας και μία εισαγωγή σε δοσιμετρικές και γεωμετρικές έννοιες που θα χρησιμοποιηθούν στο επόμενο κεφάλαιο. Το κεφάλαιο 5 αναφέρεται, εξ’ ολοκλήρου, στο σύστημα του ψηφιακού στεφανιογράφου. Μετά την αναφορά στην παλμική ακτινοσκόπηση, τα modes απεικόνισης fluoroscopy και cine, ακολουθεί περιγραφή της τοποθέτησης των δοσιμέτρων, της γεωμετρίας και των προγραμμάτων του συστήματος, που χρησιμοποιήθηκαν για την καταγραφή του ρυθμού δόσης στην είσοδο του ασθενούς. Παρουσιάζονται τ’ αποτελέσματα και οι γραφικές παραστάσεις αυτών, καθώς και τα σχόλια που σχετίζονται με τη δοσιμετρία. Με την ολοκλήρωση των σχολίων συτών, γίνεται μετάβαση στην ποιότητα εικόνας (διακριτική ικανότητα υψηλής και… Advisors/Committee Members: Νικηφορίδης, Γεώργιος, Karaiskou, Andriana, Νικηφορίδης, Γεώργιος, Παναγιωτάκης, Γεώργιος, Κωσταρίδου, Ελένη.

Subjects/Keywords: Στεφανιογραφία; Επίπεδοι ανιχνευτές ενεργού μήτρας; 616.075 4; Flat panel detectors

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Καραΐσκου, �. (2008). Βελτιστοποίηση παραμέτρων ποιότητας εικόνας και δοσιμετρίας στην επεμβατική στεφανιογραφία με χρήση επίπεδων ανιχνευτών ενεργού μήτρας (flat panel detectors). (Masters Thesis). University of Patras. Retrieved from http://nemertes.lis.upatras.gr/jspui/handle/10889/1257

Chicago Manual of Style (16^th Edition):

Καραΐσκου, Ανδριάνα. “Βελτιστοποίηση παραμέτρων ποιότητας εικόνας και δοσιμετρίας στην επεμβατική στεφανιογραφία με χρήση επίπεδων ανιχνευτών ενεργού μήτρας (flat panel detectors).” 2008. Masters Thesis, University of Patras. Accessed January 19, 2021. http://nemertes.lis.upatras.gr/jspui/handle/10889/1257.

MLA Handbook (7^th Edition):

Καραΐσκου, Ανδριάνα. “Βελτιστοποίηση παραμέτρων ποιότητας εικόνας και δοσιμετρίας στην επεμβατική στεφανιογραφία με χρήση επίπεδων ανιχνευτών ενεργού μήτρας (flat panel detectors).” 2008. Web. 19 Jan 2021.

Vancouver:

Καραΐσκου �. Βελτιστοποίηση παραμέτρων ποιότητας εικόνας και δοσιμετρίας στην επεμβατική στεφανιογραφία με χρήση επίπεδων ανιχνευτών ενεργού μήτρας (flat panel detectors). [Internet] [Masters thesis]. University of Patras; 2008. [cited 2021 Jan 19]. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/1257.

Council of Science Editors:

Καραΐσκου �. Βελτιστοποίηση παραμέτρων ποιότητας εικόνας και δοσιμετρίας στην επεμβατική στεφανιογραφία με χρήση επίπεδων ανιχνευτών ενεργού μήτρας (flat panel detectors). [Masters Thesis]. University of Patras; 2008. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/1257

Hong Kong University of Science and Technology

13. Chen, Shuming. White organic light-emitting diodes for solid-state lighting and flat-panel display applications.

Degree: 2012, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-7738 ; https://doi.org/10.14711/thesis-b1197955 ; http://repository.ust.hk/ir/bitstream/1783.1-7738/1/th_redirect.html

► This thesis focuses on the development of novel white organic light-emitting diodes (WOLEDs) for solid-state lighting and flat-panel display applications. Firstly, non-doped type WOLEDs employing… (more)

▼ This thesis focuses on the development of novel white organic light-emitting diodes (WOLEDs) for solid-state lighting and flat-panel display applications. Firstly, non-doped type WOLEDs employing novel emitters featuring aggregation-induced emission are demonstrated. Due to elimination of the doping procedures, the fabrication process is much simplified, resulting in a reduced TACT time and an improved performance repeatability compared to conventional doped type WOLEDs. By employing emitters with good charge carrier mobility, bilayer non-doped WOLEDs are further demonstrated. The material cost is cut down significantly due to reduction of the number of materials/layers used to construct such bilayer WOLEDs. Secondly, efficient WOLEDs with evenly separated red, green and blue peaks are demonstrated in a new three-emitter platform. In such system, WOLEDs based on a novel yellowish-green emitter demonstrate remarkably higher efficiency together with excellent color rendering capability as compared to the commercial benchmark green emitter Ir(ppy)3. The demonstrated WOLEDs with peak total efficiency up to 66 lm/W and high color rendering index up to 91 would be ideal candidates to bring WOLEDs into the next generation flat-panel display and solid-state lighting market. To further enhance the efficiency of the WOLEDs, two simple, low cost and scalable substrate modification methods for effectively extracting the substrate waveguide light from OLEDs are proposed. By simply sandblasting the edges and the backside surface of glass, a 20% forward efficiency improvement has been achieved. To further increase the scattering probability, scattering films consisting of organic nanoparticles/nanowires are employed. OLEDs with scattering films demonstrated a forward efficiency improvement up to 31%. The proposed simple, low cost and scalable substrate modification techniques capable of simultaneously improving the luminous efficiency and uniformity are very attractive for large area WOLED lighting panel applications. Finally, top-emitting WOLEDs for display applications are developed. In the first implementation, by taking advantage of the microcavity effect, efficient top-emitting blue OLEDs are firstly obtained and by capping a red color conversion layer on top of the blue OLEDs, a white emission resulting from the mixing of the converted red emission and the unabsorbed blue emission is achieved. The color converted top-emitting WOLEDs exhibiting pure white color and extremely high color stability can potentially be used to construct high-contrast white-black medical displays. In the second implementation, the microcavity effect is effectively suppressed by using a low reflection cathode. With an Yb (5 nm)/Au (15 nm)/MoO3 (30 nm) composite cathode, the demonstrated top-emitting WOLEDs exhibit negligible interference effect and consequently show broadband white emission with evenly separated red, green and blue peaks. The successful demonstration of the top-emitting WOLEDs on a SVGA+ microdisplay shows their great potential…

Subjects/Keywords: Light emitting diodes ; Organic electronics ; Solid state electronics ; Flat panel displays

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chen, S. (2012). White organic light-emitting diodes for solid-state lighting and flat-panel display applications. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7738 ; https://doi.org/10.14711/thesis-b1197955 ; http://repository.ust.hk/ir/bitstream/1783.1-7738/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Shuming. “White organic light-emitting diodes for solid-state lighting and flat-panel display applications.” 2012. Thesis, Hong Kong University of Science and Technology. Accessed January 19, 2021. http://repository.ust.hk/ir/Record/1783.1-7738 ; https://doi.org/10.14711/thesis-b1197955 ; http://repository.ust.hk/ir/bitstream/1783.1-7738/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Shuming. “White organic light-emitting diodes for solid-state lighting and flat-panel display applications.” 2012. Web. 19 Jan 2021.

Vancouver:

Chen S. White organic light-emitting diodes for solid-state lighting and flat-panel display applications. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2012. [cited 2021 Jan 19]. Available from: http://repository.ust.hk/ir/Record/1783.1-7738 ; https://doi.org/10.14711/thesis-b1197955 ; http://repository.ust.hk/ir/bitstream/1783.1-7738/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen S. White organic light-emitting diodes for solid-state lighting and flat-panel display applications. [Thesis]. Hong Kong University of Science and Technology; 2012. Available from: http://repository.ust.hk/ir/Record/1783.1-7738 ; https://doi.org/10.14711/thesis-b1197955 ; http://repository.ust.hk/ir/bitstream/1783.1-7738/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology

14. Zhang, Meng. Fabrication and characterization of small-grain silicon-based thin-film transistors.

Degree: 2016, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-86939 ; https://doi.org/10.14711/thesis-b1626125 ; http://repository.ust.hk/ir/bitstream/1783.1-86939/1/th_redirect.html

► This thesis focuses on small-grain silicon-based TFTs for high-resolution flat panel displays (FPDs) and system-on-panel (SoP) applications. Firstly, different kinds of treatments are applied to… (more)

▼ This thesis focuses on small-grain silicon-based TFTs for high-resolution flat panel displays (FPDs) and system-on-panel (SoP) applications. Firstly, different kinds of treatments are applied to small-grain polycrystalline silicon (poly-Si) thin film transistors (TFTs) to generate high-performance device characteristics. Then, the reliability of small-grain poly-Si TFTs is systematically characterized and studied. Last, self-aligned top-gate microcrystalline (μc-Si) TFTs are fabricated and investigated. For the performance improvement of small-grain poly-Si TFTs, firstly, small-grain poly-Si TFTs integrating a high-k gate dielectric with bridged-grain (BG) active channel are demonstrated. The as-fabricated devices exhibit outstanding performance improvements, especially for off-state characteristics. Then, two-dimensional dot-array (DA) doping technology is proposed to improve device performance. With the DA doping in the active channel, device characteristics show great improvements, especially for on-state characteristics. Last, a simple method is introduced to grow thermal SiO₂ interlayer between small-grain poly-Si channel and the high-k gate dielectric for high-performance small-grain poly-Si TFTs. The effect of the buffer layer, O₂ annealing and the Si interstitials is clarified. All these treatments on small-grain poly-Si TFTs are low-temperature compatible, low cost, and without process variation and reliability issues. Small-grain poly-Si TFTs employing these treatments show great potential in high-resolution FPDs and SoP applications. For reliability test, firstly, water-related parasitic effect in poly-Si TFTs is systematically studied. The role of H₂O in the interface during negative bias temperature instability (NBTI) stress is clarified. Different combinations of passivation layers are applied to poly-Si TFTs to keep H₂O from diffusing into the gate oxide network near interface, and the NBTI reliability is effectively improved. Secondly, degradation of BG poly-Si TFTs under different kinds of DC stresses is characterized. Compared to normal poly-Si TFTs, BG poly-Si TFTs exhibit better hot carrier (HC) reliability, better self-heating (SH) reliability and better NBTI reliability. Lateral electric field (E_x) reduction at drain side, improved Joule heat diffusion at channel length direction and boron-hydrogen bond formation in the channel are respectively responsible for these improvements. Thirdly, AC-drain/gate-stress induced degradation in poly-Si TFTs is systemically investigated. A physical non-equilibrium junction degradation model including time-dependent carrier emission/recombination process is proposed. The dynamic HC degradation in BG poly-Si TFTs is greatly alleviated due to E_x reduction caused by the sharing of the field across multiple reverse biased junctions. Lastly, device degradation under “practical” stress is systematically studied in poly-Si TFTs. Under either the “driving” stress or “switching” stress, BG poly-Si…

Subjects/Keywords: Thin film transistors ; Silicon ; Electric properties ; Flat panel displays ; Materials

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APA (6^th Edition):

Zhang, M. (2016). Fabrication and characterization of small-grain silicon-based thin-film transistors. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-86939 ; https://doi.org/10.14711/thesis-b1626125 ; http://repository.ust.hk/ir/bitstream/1783.1-86939/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Meng. “Fabrication and characterization of small-grain silicon-based thin-film transistors.” 2016. Thesis, Hong Kong University of Science and Technology. Accessed January 19, 2021. http://repository.ust.hk/ir/Record/1783.1-86939 ; https://doi.org/10.14711/thesis-b1626125 ; http://repository.ust.hk/ir/bitstream/1783.1-86939/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Meng. “Fabrication and characterization of small-grain silicon-based thin-film transistors.” 2016. Web. 19 Jan 2021.

Vancouver:

Zhang M. Fabrication and characterization of small-grain silicon-based thin-film transistors. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2016. [cited 2021 Jan 19]. Available from: http://repository.ust.hk/ir/Record/1783.1-86939 ; https://doi.org/10.14711/thesis-b1626125 ; http://repository.ust.hk/ir/bitstream/1783.1-86939/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang M. Fabrication and characterization of small-grain silicon-based thin-film transistors. [Thesis]. Hong Kong University of Science and Technology; 2016. Available from: http://repository.ust.hk/ir/Record/1783.1-86939 ; https://doi.org/10.14711/thesis-b1626125 ; http://repository.ust.hk/ir/bitstream/1783.1-86939/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology

15. Shi, Liangyu ECE. Fast ferroelectric liquid crystal for field sequential color displays : from micro-displays to flat panels.

Degree: 2018, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-96002 ; https://doi.org/10.14711/thesis-991012637468103412 ; http://repository.ust.hk/ir/bitstream/1783.1-96002/1/th_redirect.html

► High resolution displays are always in highly demand and especially popular recently together with the prevailing virtual reality and augmented reality technology. Utilizing fast switching… (more)

▼ High resolution displays are always in highly demand and especially popular recently together with the prevailing virtual reality and augmented reality technology. Utilizing fast switching ferroelectric liquid crystal, we can apply the field sequential color to display panel: from micro-displays to flat panel displays. The fast vertical aligned nematic liquid applied to LCoS is used in head up displays for automotive with a wide temperature range from 10°C to 80°C. Although the rubbing mura can be solved by post annealing, the response time in the order of sub-millisecond is not possible to avoid the color break-up. Electrically suppressed helix ferroelectric liquid crystal on silicon projection with microsecond response time using pulse width modulation to generation grey level is achieved on digital Jasper Display Corp. CMOS backplane. This is proved by us to be a better option for FSC LCoS. FSC ESHFLC is further studied and applied to active matrix TFT array for the larger size and commercial market. Using 3T1C pixel circuit, we successfully convert digital signal to the analog and have achieved at least 8-bit gray level color. The color spectrum measured is 105% NTSC in CIE 1931. Specific driving frame is designed to solve the DC compensation issue for Ferroelectric liquid crystal. High voltage acceleration for compensation is also investigated to over the issues. Color breakup suppress methods for FSC are applied to ESHFLC to improve the quality for motion rainbow suppress. Considering 3T1C pixel circuit limits the high resolution and ppi of the panel, deformed helix ferroelectric liquid crystal based on molecule re-distribution within a pitch is more attractive for its attributes of more compatible with the current driving scheme and pixel circuit. Single alignment layer boundary condition is proposed to improve the low contrast ratio issues. This certain constrain suppresses the ferroelectric domains appear in traditional double side alignment and thus improves the electro-optical performance. To apply it onto a uniform TFT display panel. More work needs to be done after defense.

Subjects/Keywords: Color display systems ; Liquid crystal devices ; Flat panel displays

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APA (6^th Edition):

Shi, L. E. (2018). Fast ferroelectric liquid crystal for field sequential color displays : from micro-displays to flat panels. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-96002 ; https://doi.org/10.14711/thesis-991012637468103412 ; http://repository.ust.hk/ir/bitstream/1783.1-96002/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shi, Liangyu ECE. “Fast ferroelectric liquid crystal for field sequential color displays : from micro-displays to flat panels.” 2018. Thesis, Hong Kong University of Science and Technology. Accessed January 19, 2021. http://repository.ust.hk/ir/Record/1783.1-96002 ; https://doi.org/10.14711/thesis-991012637468103412 ; http://repository.ust.hk/ir/bitstream/1783.1-96002/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shi, Liangyu ECE. “Fast ferroelectric liquid crystal for field sequential color displays : from micro-displays to flat panels.” 2018. Web. 19 Jan 2021.

Vancouver:

Shi LE. Fast ferroelectric liquid crystal for field sequential color displays : from micro-displays to flat panels. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2018. [cited 2021 Jan 19]. Available from: http://repository.ust.hk/ir/Record/1783.1-96002 ; https://doi.org/10.14711/thesis-991012637468103412 ; http://repository.ust.hk/ir/bitstream/1783.1-96002/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shi LE. Fast ferroelectric liquid crystal for field sequential color displays : from micro-displays to flat panels. [Thesis]. Hong Kong University of Science and Technology; 2018. Available from: http://repository.ust.hk/ir/Record/1783.1-96002 ; https://doi.org/10.14711/thesis-991012637468103412 ; http://repository.ust.hk/ir/bitstream/1783.1-96002/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology

16. Pan, Su ECE. High-performance thin film polarizers for flat panel displays.

Degree: 2017, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-105604 ; https://doi.org/10.14711/thesis-991012552569303412 ; http://repository.ust.hk/ir/bitstream/1783.1-105604/1/th_redirect.html

► Nowadays, flat panel displays (FPDs), such as computer monitors, mobile phones and televisions, are ubiquitous in our daily lives, presenting us information and entertainment. The… (more)

▼ Nowadays, flat panel displays (FPDs), such as computer monitors, mobile phones and televisions, are ubiquitous in our daily lives, presenting us information and entertainment. The liquid crystal display (LCD) and organic light-emitting diode (OLED) display are the mainstream display technologies due to their high-quality performance. The polarizer is an indispensable element in LCDs, and has a great influence on their light efficiency and contrast ratio. The employment of a polarizer is also necessary in OLED displays to improve the contrast ratio and readability under sunlight. Conventional thin film polarizers have a thickness of around 25 μm and are based on stretched polyvinyl alcohol (PVA) doped with iodine. The shrinkage force resulting from the stretching process is a serious concern for their application in flexible displays. For the development of ultra-thin and flexible displays, polarizers with an ultra-thin profile and compatibility with flexible displays are demanded. Firstly, broadband reflective polarizers with a thickness less than one micrometer are designed to improve the light efficiency of LCDs. We propose to generate giant form birefringence based on a subwavelength silicon grating. The optical characteristics of the proposed polarizer are investigated by the finite-difference time-domain (FDTD) method, and show high transmission, a large extinction ratio and a wide acceptable angle. The proposed polarizer can not only reduce the thickness of LCDs, but also improves the efficiency by 50% via incorporating a backlight recycling technique. What’s more, dichroic polarizers based on photoalignment methods are demonstrated. Photoalignment is a simple and low-cost way to produce dichroic polarizers, and it shows advantages for flexible displays because the produced polarizers are ultra-thin, are able to be integrated inside LC cells and are free from the shrinkage issue. The main problem that has hindered the practical application of dichroic polarizers produced by photoalignment is the insufficient dichroic ratio. We propose two approaches to realize high-performance dichroic polarizers based on photoalignment methods. Firstly, the photoalignment kinetics of AD-1 thin films deposited by spin coating are studied, and the effect of relative humidity on the photoalignment process and final achieved dichroic ratio is investigated on a hydrophobic azobenzene molecule (AD-1) for the first time. An average dichroic ratio of up to 100 from 450 nm to 550 nm is realized after optimization, which is the highest value achieved among all photoaligment-based approaches. Secondly, a novel photoalignment method is proposed, and polarizers with a high average dichroic ratio of 55 from 400 nm to 500 nm are fabricated by vacuum evaporation. Moreover, the energy consumed by this method is low, which is more economical for practical manufacturing. Furthermore, the polarizers produced by both methods are only several hundreds of nanometers thick, which are urgently demanded for ultra-thin and flexible displays.

Subjects/Keywords: Flat panel displays ; Thin films ǂx Materials ; Polarizers (Light)

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APA (6^th Edition):

Pan, S. E. (2017). High-performance thin film polarizers for flat panel displays. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-105604 ; https://doi.org/10.14711/thesis-991012552569303412 ; http://repository.ust.hk/ir/bitstream/1783.1-105604/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pan, Su ECE. “High-performance thin film polarizers for flat panel displays.” 2017. Thesis, Hong Kong University of Science and Technology. Accessed January 19, 2021. http://repository.ust.hk/ir/Record/1783.1-105604 ; https://doi.org/10.14711/thesis-991012552569303412 ; http://repository.ust.hk/ir/bitstream/1783.1-105604/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pan, Su ECE. “High-performance thin film polarizers for flat panel displays.” 2017. Web. 19 Jan 2021.

Vancouver:

Pan SE. High-performance thin film polarizers for flat panel displays. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2017. [cited 2021 Jan 19]. Available from: http://repository.ust.hk/ir/Record/1783.1-105604 ; https://doi.org/10.14711/thesis-991012552569303412 ; http://repository.ust.hk/ir/bitstream/1783.1-105604/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pan SE. High-performance thin film polarizers for flat panel displays. [Thesis]. Hong Kong University of Science and Technology; 2017. Available from: http://repository.ust.hk/ir/Record/1783.1-105604 ; https://doi.org/10.14711/thesis-991012552569303412 ; http://repository.ust.hk/ir/bitstream/1783.1-105604/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

17. Festen, B.R.T. (author). Proof of concept of a thermal imager with milliKelvin thermal resolution.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0fff3ae7-a4d9-48f1-9a8d-89a74889a379

Not available because of confidentiallity

Precision and Microsystems Engineering

Mechanical, Maritime and Materials Engineering

Advisors/Committee Members: Saathof, R. (mentor).

Subjects/Keywords: thermal imager

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APA (6^th Edition):

Festen, B. R. T. (. (2012). Proof of concept of a thermal imager with milliKelvin thermal resolution. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0fff3ae7-a4d9-48f1-9a8d-89a74889a379

Chicago Manual of Style (16^th Edition):

Festen, B R T (author). “Proof of concept of a thermal imager with milliKelvin thermal resolution.” 2012. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:0fff3ae7-a4d9-48f1-9a8d-89a74889a379.

MLA Handbook (7^th Edition):

Festen, B R T (author). “Proof of concept of a thermal imager with milliKelvin thermal resolution.” 2012. Web. 19 Jan 2021.

Vancouver:

Festen BRT(. Proof of concept of a thermal imager with milliKelvin thermal resolution. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:0fff3ae7-a4d9-48f1-9a8d-89a74889a379.

Council of Science Editors:

Festen BRT(. Proof of concept of a thermal imager with milliKelvin thermal resolution. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:0fff3ae7-a4d9-48f1-9a8d-89a74889a379

Brno University of Technology

18. Havlíček, Jiří. Polyfunkční dům v Táboře: Multifunctional Building in Tabor.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/37936

► The thesis “Multifunctional building in Tábor” is processed in the form of project documentation which comprises of all the requisites required by current regulations. Designed… (more)

Subjects/Keywords: Polyfunkční dům; nebytový prostor; byt; vápenopískové cihly; stropní panel; plochá střecha; kontaktní zateplovací systém; Multifunctional building; commercial premises; flat; lime-sand bricks; ceiling panel; flat roof; contact thermal insulation system

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APA (6^th Edition):

Havlíček, J. (2019). Polyfunkční dům v Táboře: Multifunctional Building in Tabor. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/37936

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Havlíček, Jiří. “Polyfunkční dům v Táboře: Multifunctional Building in Tabor.” 2019. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/37936.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Havlíček, Jiří. “Polyfunkční dům v Táboře: Multifunctional Building in Tabor.” 2019. Web. 19 Jan 2021.

Vancouver:

Havlíček J. Polyfunkční dům v Táboře: Multifunctional Building in Tabor. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/37936.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Havlíček J. Polyfunkční dům v Táboře: Multifunctional Building in Tabor. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/37936

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

19. Kaelani, Marc (author). Determining the causal bi-directional relationship between active travel and health.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:2b63c28e-cfb7-4ffe-85da-362504963b29

► In the Netherlands, only 55% of the Dutch population meets the norm of 150 minutes of moderate physical activity per week. To increase overall physical… (more)

Subjects/Keywords: (Random Intercepts) - Cross-Lagged Panel Model; Physical activity; Active travel; Health

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APA (6^th Edition):

Kaelani, M. (. (2018). Determining the causal bi-directional relationship between active travel and health. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2b63c28e-cfb7-4ffe-85da-362504963b29

Chicago Manual of Style (16^th Edition):

Kaelani, Marc (author). “Determining the causal bi-directional relationship between active travel and health.” 2018. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:2b63c28e-cfb7-4ffe-85da-362504963b29.

MLA Handbook (7^th Edition):

Kaelani, Marc (author). “Determining the causal bi-directional relationship between active travel and health.” 2018. Web. 19 Jan 2021.

Vancouver:

Kaelani M(. Determining the causal bi-directional relationship between active travel and health. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:2b63c28e-cfb7-4ffe-85da-362504963b29.

Council of Science Editors:

Kaelani M(. Determining the causal bi-directional relationship between active travel and health. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:2b63c28e-cfb7-4ffe-85da-362504963b29

Virginia Tech

20. Slagle, Adam Christopher. Low Frequency Noise Reduction Using Novel Poro-Elastic Acoustic Metamaterials.

Degree: MS, Mechanical Engineering, 2014, Virginia Tech

URL: http://hdl.handle.net/10919/64200

► Low frequency noise is a common problem in aircraft and launch vehicles. New technologies must be investigated to reduce this noise while contributing minimal weight… (more)

▼ Low frequency noise is a common problem in aircraft and launch vehicles. New technologies must be investigated to reduce this noise while contributing minimal weight to the structure. This thesis investigates passive and active control methods to improve low frequency sound absorption and transmission loss using acoustic metamaterials. The acoustic metamaterials investigated consist of poro-elastic acoustic heterogeneous (HG) metamaterials and microperforated (MPP) acoustic metamaterials. HG metamaterials consist of poro-elastic material with a periodic arrangement of embedded masses acting as an array of mass-spring- damper systems. MPP acoustic metamaterials consist of periodic layers of micro-porous panels embedded in poro-elastic material. This thesis examines analytically, experimentally, and numerically the behavior of acoustic metamaterials compared to a baseline poro-elastic sample. The development of numerical techniques using finite element analysis will aid in understanding the physics behind their functionality and will influence their design. Design studies are performed to understand the effects of varying the density, size, shape, and placement of the embedded masses as well as the location and distribution of microperforated panels in poro- elastic material. An active HG metamaterial is investigated, consisting of an array of active masses embedded within poro-elastic material. Successful tonal and broadband noise control is achieved using a feedforward, filtered-x LMS control algorithm to minimize the downstream sound pressure level. Low-frequency absorption and transmission loss is successfully increased in the critical frequency range below 500 Hz. Acoustic metamaterials are compact compared to conventional materials and find applications in controlling low-frequency sound radiation in aircraft and launch vehicles. Advisors/Committee Members: Fuller, Christopher R. (committeechair), Southward, Steve C. (committee member), Schiller, Noah Harrison (committee member).

Subjects/Keywords: Acoustic Metamaterial; Heterogeneous Material (HG); Microperforated Panel (MPP); Active Noise Control

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APA (6^th Edition):

Slagle, A. C. (2014). Low Frequency Noise Reduction Using Novel Poro-Elastic Acoustic Metamaterials. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/64200

Chicago Manual of Style (16^th Edition):

Slagle, Adam Christopher. “Low Frequency Noise Reduction Using Novel Poro-Elastic Acoustic Metamaterials.” 2014. Masters Thesis, Virginia Tech. Accessed January 19, 2021. http://hdl.handle.net/10919/64200.

MLA Handbook (7^th Edition):

Slagle, Adam Christopher. “Low Frequency Noise Reduction Using Novel Poro-Elastic Acoustic Metamaterials.” 2014. Web. 19 Jan 2021.

Vancouver:

Slagle AC. Low Frequency Noise Reduction Using Novel Poro-Elastic Acoustic Metamaterials. [Internet] [Masters thesis]. Virginia Tech; 2014. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10919/64200.

Council of Science Editors:

Slagle AC. Low Frequency Noise Reduction Using Novel Poro-Elastic Acoustic Metamaterials. [Masters Thesis]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/64200

University of Rochester

21. Zhang, Yan (1978 - ). Three-dimensional image quality evaluation and improvement in flat-panel detector based cone-beam CT imaging.

Degree: PhD, 2011, University of Rochester

URL: http://hdl.handle.net/1802/14426

► Due to the development of flat-panel detector (FPD) in recent years, FPD-based cone beam computed tomography (CBCT) made a breakthrough in CT imaging in terms… (more)

▼ Due to the development of flat-panel detector (FPD) in recent years, FPD-based cone beam computed tomography (CBCT) made a breakthrough in CT imaging in terms of large volume reconstruction and isotropic resolution. This technique provides three-dimensional (3D) visualization of the imaged anatomy with one single circular scan, enabling one to reformat slices at any arbitrary orientation with high spatial resolution. Due to all these advantages, FPD-based CBCT has become the most promising imaging modality in many medical fields, including small animal imaging, breast imaging, bone imaging, etc. As a potential diagnostic imaging tool for medical professionals, FPD-based CBCT needs to consistently provide high-quality images. Therefore, it’s important to fully evaluate its imaging performance and to be able to correct the image artifacts that arise from various sources. This dissertation focuses on two primary issues faced by FPD-based CBCT: 3D image quality evaluation and image quality improvement with artifact correction. The five chapters that follow deal with the following five matters: (1) First, new image quality evaluation methods are proposed to evaluate major image quality factors of CBCT based on its 3D volume reconstruction characteristic. (2) Second, a noise model is developed to study the noise level in reconstructed 3D images – this model allows one to study the relationship between noise level and various parameters of CBCT system. (3) Third, the relationship between image lag in CBCT and different detector parameter, as well as x-ray techniques, are investigated; this chapter also characterizes the quantitative effect of image lag on image quality in breast imaging. (4) A correction method is developed to correct for the streaking and shading artifacts caused by metal implants in FPD-based CBCT bone imaging. (5) Finally, a simple artifact correction method is developed to correct for the dark strip that appears at the chest-wall in breast imaging, a consequence of incomplete projections.

Subjects/Keywords: Cone-beam CT; Image quality; Flat-panel detector; Image noise; Beam hardening; Breast CT

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APA (6^th Edition):

Zhang, Y. (. -. ). (2011). Three-dimensional image quality evaluation and improvement in flat-panel detector based cone-beam CT imaging. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/14426

Chicago Manual of Style (16^th Edition):

Zhang, Yan (1978 - ). “Three-dimensional image quality evaluation and improvement in flat-panel detector based cone-beam CT imaging.” 2011. Doctoral Dissertation, University of Rochester. Accessed January 19, 2021. http://hdl.handle.net/1802/14426.

MLA Handbook (7^th Edition):

Zhang, Yan (1978 - ). “Three-dimensional image quality evaluation and improvement in flat-panel detector based cone-beam CT imaging.” 2011. Web. 19 Jan 2021.

Vancouver:

Zhang Y(-). Three-dimensional image quality evaluation and improvement in flat-panel detector based cone-beam CT imaging. [Internet] [Doctoral dissertation]. University of Rochester; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1802/14426.

Council of Science Editors:

Zhang Y(-). Three-dimensional image quality evaluation and improvement in flat-panel detector based cone-beam CT imaging. [Doctoral Dissertation]. University of Rochester; 2011. Available from: http://hdl.handle.net/1802/14426

Brigham Young University

22. Cushman, Cody Vic. Multi-Instrument Surface Characterization of Display Glass.

Degree: PhD, 2019, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8477&context=etd

► Flat panel displays (FPDs) are microfabricated devices that are often fabricated on specialized glass substrates known as display glass. The surface chemistry of the outer… (more)

▼ Flat panel displays (FPDs) are microfabricated devices that are often fabricated on specialized glass substrates known as display glass. The surface chemistry of the outer few nanometers of display glass can have an important influence on FPD performance and yield. Dsiplay glass surface characterization is difficult because (i) display glass surface composition varies significantly from its bulk composition; (ii) high-surface area forms of glass, such as fibers and powders, may not have the same surface composition as melt-formed planar surfaces, and (iii) the surface composition of display glass may be altered through exposure to chemical treatments commonly used during flat panel display production, including acids, bases, etchants, detergents, and plasmas. We have performed a detailed surface composition of Eagle XG®, a widely used commercial display glass substrate, using a range of surface analytical techniques including time-of-flight secondary ion mass spectrometry (ToF-SIMS), angle-resolved X-ray photoelectron spectroscopy (AR-XPS) and low energy ion scattering (LEIS). The information from these techniques has given us a detailed understanding of the elemental surface composition and surface hydroxylation of Eagle XG® at length scales ranging from ca. 10 nm from the surface to the outermost atomic layer. These analyses reveal that the surface composition of Eagle XG® varies significantly from its bulk composition, having generally lower concentrations of Al, B, Mg, Ca, and Sr, and higher concentrations of Si. Treatment with an industrial alkaline detergent results in significant recovery of aluminum concentration at the Eagle XG® surface, while treatment with hydrochloric and hydrofluoric acid result in further depletion of Al, B, Mg, Ca, and Sr at the sample surface.We used ToF-SIMS to quantify surface hydroxyls at the sample surface of this material. The SiOH+/Si+ peak area ratio was a useful metric of surface hydroxylation. We studied the effects of adventitious surface contamination on the measurements by analyzing samples dosed with perdeuterated triacontane, a model alkane, prior to analysis. Thick triacontane overlayers suppressed the SiOH+ signal, indicating that this approach gives inaccurately low estimates of surface hydroxylation for samples with high degrees of surface contamination, and accurate measurements are only possible for very-clean surfaces. The number of of hydroxyls on Eagle XG® surfaces varied as the surfaces were exposed to different chemical treatments. HF- and HCl- treated surfaces had the highest degree of hydroxylation, while detergent-treated surfaces had the lowest.

Subjects/Keywords: ToF-SIMS; XPS; LEIS; flat panel display; display glass; surface hydroxyl; multivatiate curve resolution

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APA (6^th Edition):

Cushman, C. V. (2019). Multi-Instrument Surface Characterization of Display Glass. (Doctoral Dissertation). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8477&context=etd

Chicago Manual of Style (16^th Edition):

Cushman, Cody Vic. “Multi-Instrument Surface Characterization of Display Glass.” 2019. Doctoral Dissertation, Brigham Young University. Accessed January 19, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8477&context=etd.

MLA Handbook (7^th Edition):

Cushman, Cody Vic. “Multi-Instrument Surface Characterization of Display Glass.” 2019. Web. 19 Jan 2021.

Vancouver:

Cushman CV. Multi-Instrument Surface Characterization of Display Glass. [Internet] [Doctoral dissertation]. Brigham Young University; 2019. [cited 2021 Jan 19]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8477&context=etd.

Council of Science Editors:

Cushman CV. Multi-Instrument Surface Characterization of Display Glass. [Doctoral Dissertation]. Brigham Young University; 2019. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8477&context=etd

University of Waterloo

23. Lopez Maurino, Sebastian. Design and Optimization of a Stacked Three-Layer X-ray Detector for Multi-Spectral Medical Imaging Applications.

Degree: 2016, University of Waterloo

URL: http://hdl.handle.net/10012/10551

► Dual-Energy (DE) imaging is a powerful technique in x-ray imaging that increases the ability to detect specific materials in a cluttered background, and is used… (more)

▼ Dual-Energy (DE) imaging is a powerful technique in x-ray imaging that increases the ability to detect specific materials in a cluttered background, and is used to more accurately visualize anatomical features and diagnose abnormalities. Single-shot imaging has arisen as one of the dominant techniques used to obtain DE images, but has the intrinsic drawback of a loss of x-ray photons in a metal mid-filter. I propose a new design of a stacked three-layer x-ray detector for DE single-shot imaging that addresses this fundamental drawback. Each layer consists of its own scintillator of individual thickness and an underlying thin-film-transistor-based flat-panel. Three images are obtained simultaneously in the detector during the same x-ray exposure, and thus the imaging system is immune to motion artifacts. The detector operation is two-fold: a conventional radiography image can be obtained by combining all three layers' images, while a DE subtraction image can be captured from the front and back layers, where the middle layer acts as a filter that helps achieve spectral separation. Two sample imaging tasks that can particularly benefit from this new detector design are selected. These are iodinated vessel visualization in coronary angiography and calcified nodule detection in pulmonary radiology. I proceed to optimize the detector parameters and imaging system configuration to best fit these two tasks by obtaining the best possible contrast to noise ratio per root entrance exposure. To achieve this, I develop an analytical model by adapting well-established theoretical foundations to fit this new detector design. These results are compared to a conventional DE temporal subtraction detector and a typical single-shot DE subtraction detector with a metal mid-filter, both of which underwent a similar analytical optimization process. The findings are then validated using advanced Monte Carlo simulations for all optimized detector configurations. The analytical and simulation results indicate that the proposed detector performs comparably as a DE imager to established single-shot detectors. It is therefore clear that this new design is an improvement on the state-of-the-art since it provides an additional feature at no performance cost. Given the performance expected from these initial results and the recent decrease in price for digital x-ray detectors, the simplicity of the three-layer stacked imager approach appears promising to usher in a new generation of multi-spectral digital x-ray imaging.

Subjects/Keywords: X-ray; Detector; Dual Energy; Multilayer; Multi Spectral; Flat-Panel Detector; Angiography; Radiography

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APA (6^th Edition):

Lopez Maurino, S. (2016). Design and Optimization of a Stacked Three-Layer X-ray Detector for Multi-Spectral Medical Imaging Applications. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/10551

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lopez Maurino, Sebastian. “Design and Optimization of a Stacked Three-Layer X-ray Detector for Multi-Spectral Medical Imaging Applications.” 2016. Thesis, University of Waterloo. Accessed January 19, 2021. http://hdl.handle.net/10012/10551.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lopez Maurino, Sebastian. “Design and Optimization of a Stacked Three-Layer X-ray Detector for Multi-Spectral Medical Imaging Applications.” 2016. Web. 19 Jan 2021.

Vancouver:

Lopez Maurino S. Design and Optimization of a Stacked Three-Layer X-ray Detector for Multi-Spectral Medical Imaging Applications. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10012/10551.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lopez Maurino S. Design and Optimization of a Stacked Three-Layer X-ray Detector for Multi-Spectral Medical Imaging Applications. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/10551

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manchester

24. Do, Hyunkyu. Institutional structuring of entrepreneurial corporate financing and innovation pace in the development process of a high-tech industry: Comparative analysis on the flat panel display (FPD) industry in Korea and Japan.

Degree: 2017, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:310198

► This study attempts to provide a more comprehensive understanding of the mechanism by which distinct industry competitiveness between countries emerges over time in the way… (more)

Subjects/Keywords: comparative institutional analysis; industry competitiveness; business system; sectoral system; East Asia; flat panel display

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APA (6^th Edition):

Do, H. (2017). Institutional structuring of entrepreneurial corporate financing and innovation pace in the development process of a high-tech industry: Comparative analysis on the flat panel display (FPD) industry in Korea and Japan. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:310198

Chicago Manual of Style (16^th Edition):

Do, Hyunkyu. “Institutional structuring of entrepreneurial corporate financing and innovation pace in the development process of a high-tech industry: Comparative analysis on the flat panel display (FPD) industry in Korea and Japan.” 2017. Doctoral Dissertation, University of Manchester. Accessed January 19, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:310198.

MLA Handbook (7^th Edition):

Do, Hyunkyu. “Institutional structuring of entrepreneurial corporate financing and innovation pace in the development process of a high-tech industry: Comparative analysis on the flat panel display (FPD) industry in Korea and Japan.” 2017. Web. 19 Jan 2021.

Vancouver:

Do H. Institutional structuring of entrepreneurial corporate financing and innovation pace in the development process of a high-tech industry: Comparative analysis on the flat panel display (FPD) industry in Korea and Japan. [Internet] [Doctoral dissertation]. University of Manchester; 2017. [cited 2021 Jan 19]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:310198.

Council of Science Editors:

Do H. Institutional structuring of entrepreneurial corporate financing and innovation pace in the development process of a high-tech industry: Comparative analysis on the flat panel display (FPD) industry in Korea and Japan. [Doctoral Dissertation]. University of Manchester; 2017. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:310198

University of Toronto

25. Chang, Li-Chi. Improving the Mechanical Performance of Wood Fiber Reinforced Bio-based Polyurethane Foam.

Degree: 2014, University of Toronto

URL: http://hdl.handle.net/1807/67909

►

Because of the environmental impact of fossil fuel consumption, soybean-based polyurethane (PU) foam has been developed as an alternative to be used as the core… (more)

Subjects/Keywords: Compression behaviors; Foam density; Non-destructive test; Polymer-matrix composites; Polyurethane foams; Sandwich Panel; 0794

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APA (6^th Edition):

Chang, L. (2014). Improving the Mechanical Performance of Wood Fiber Reinforced Bio-based Polyurethane Foam. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/67909

Chicago Manual of Style (16^th Edition):

Chang, Li-Chi. “Improving the Mechanical Performance of Wood Fiber Reinforced Bio-based Polyurethane Foam.” 2014. Masters Thesis, University of Toronto. Accessed January 19, 2021. http://hdl.handle.net/1807/67909.

MLA Handbook (7^th Edition):

Chang, Li-Chi. “Improving the Mechanical Performance of Wood Fiber Reinforced Bio-based Polyurethane Foam.” 2014. Web. 19 Jan 2021.

Vancouver:

Chang L. Improving the Mechanical Performance of Wood Fiber Reinforced Bio-based Polyurethane Foam. [Internet] [Masters thesis]. University of Toronto; 2014. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1807/67909.

Council of Science Editors:

Chang L. Improving the Mechanical Performance of Wood Fiber Reinforced Bio-based Polyurethane Foam. [Masters Thesis]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/67909

26. Dürre, Alexander. Robust change-point detection and dependence modeling.

Degree: 2017, Technische Universität Dortmund

URL: http://dx.doi.org/10.17877/DE290R-18148

► This doctoral thesis consists of three parts: robust estimation of the autocorrelation function, the spatial sign correlation, and robust change-point detection in panel data. Albeit… (more)

▼ This doctoral thesis consists of three parts: robust estimation of the autocorrelation function, the spatial sign correlation, and robust change-point detection in panel data. Albeit covering quite different statistical branches like time series analysis, multivariate analysis, and change-point detection, there is a common issue in all of the sections and this is robustness. Robustness is in the sense that the statistical analysis should stay reliable if there is a small fraction of observations which do not follow the chosen model. The first part of the thesis is a review study comparing different proposals for robust estimation of the autocorrelation function. Over the years many estimators have been proposed but thorough comparisons are missing, resulting in a lack of knowledge which estimator is preferable in which situation. We treat this problem, though we mainly concentrate on a special but nonetheless very popular case where the bulk of observations is generated from a linear Gaussian process. The second chapter deals with something congeneric, namely measuring dependence through the spatial sign correlation, a robust and within the elliptic model distribution-free estimator for the correlation based on the spatial sign covariance matrix. We derive its asymptotic distribution and robustness properties like influence function and gross error sensitivity. Furthermore we propose a two stage version which improves both efficiency under normality and robustness. The surprisingly simple formula of its asymptotic variance is used to construct a variance stabilizing transformation, which enables us to calculate very accurate confidence intervals, which are distribution-free within the elliptic model. We also propose a positive semi-definite multivariate spatial sign correlation, which is more efficient but less robust than its bivariate counterpart. The third chapter deals with a robust test for a location change in panel data under serial dependence. Robustness is achieved by using robust scores, which are calculated by applying psi-functions. The main focus here is to derive asymptotics under the null hypothesis of a stationary panel, if both the number of individuals and time points tend to infinity. We can show under some regularity assumptions that the limiting distribution does not depend on the underlying distribution of the panel as long as we have short range dependence in the time dimension and ndependence in the cross sectional dimension. Advisors/Committee Members: Fried, Roland (advisor), Vogel, Daniel (advisor), Müller, Christine H. (referee).

Subjects/Keywords: Robustness; Autocorrelation; Spatial sign covariance matrix; Panel data; 310; 570; Robuste Schätzung; Autokorrelation; Panelanalyse; Kovarianzmatrix

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APA (6^th Edition):

Dürre, A. (2017). Robust change-point detection and dependence modeling. (Doctoral Dissertation). Technische Universität Dortmund. Retrieved from http://dx.doi.org/10.17877/DE290R-18148

Chicago Manual of Style (16^th Edition):

Dürre, Alexander. “Robust change-point detection and dependence modeling.” 2017. Doctoral Dissertation, Technische Universität Dortmund. Accessed January 19, 2021. http://dx.doi.org/10.17877/DE290R-18148.

MLA Handbook (7^th Edition):

Dürre, Alexander. “Robust change-point detection and dependence modeling.” 2017. Web. 19 Jan 2021.

Vancouver:

Dürre A. Robust change-point detection and dependence modeling. [Internet] [Doctoral dissertation]. Technische Universität Dortmund; 2017. [cited 2021 Jan 19]. Available from: http://dx.doi.org/10.17877/DE290R-18148.

Council of Science Editors:

Dürre A. Robust change-point detection and dependence modeling. [Doctoral Dissertation]. Technische Universität Dortmund; 2017. Available from: http://dx.doi.org/10.17877/DE290R-18148

Virginia Tech

27. Zhao, Wei. Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings.

Degree: PhD, Aerospace Engineering, 2017, Virginia Tech

URL: http://hdl.handle.net/10919/79143

► Large-aspect-ratio wings and composite structures both have been considered for the next-generation civil transport aircraft to achieve improved aerodynamic efficiency and to save aircraft structural… (more)

▼ Large-aspect-ratio wings and composite structures both have been considered for the next-generation civil transport aircraft to achieve improved aerodynamic efficiency and to save aircraft structural weight. The use of the large-aspect-ratio and the light-weight composite wing can lead to an enhanced flexibility of the aircraft wing, which may cause many aeroelastic problems such as large deflections, increased drag, onset of flutter, loss of control authority, etc. Aeroelastic tailoring, internal structural layout design and aerodynamic wing shape morphing are all considered to address these aeroelastic problems through multidisciplinary design, analysis and optimization (MDAO) studies in this work. Performance Adaptive Aeroelastic Wing (PAAW) program was initiated by NASA to leverage the flexibility associated with the use of the large-aspect-ratio wings and light-weight composite structures in a beneficial way for civil transport aircraft wing design. The biologically inspired SpaRibs concept is used for aircraft wing box internal structural layout design to achieve the optimal stiffness distribution to improve the aircraft performance. Along with the use of the active aeroelastic wing concept through morphing wing shape including the wing jig-shape, the control surface rotations and the aeroelastic tailoring scheme using composite laminates with ply-drop for wing skin design, a MDAO framework, which has the capabilities in total structural weight minimization, total drag minimization during cruise, ground roll distance minimization in takeoff and load alleviation in various maneuver loads by morphing its shape, is developed for designing models used in the PAAW program. A bilevel programming (BLP) multidisciplinary design optimization (MDO) architecture is developed for the MDAO framework. The upper-level optimization problem entails minimization of weight, drag and ground roll distance, all subjected to both static constraints and the global dynamic requirements including flutter mode and free vibration modes due to the specified control law design for body freedom flutter suppression and static margin constraint. The lower-level optimization is conducted to minimize the total drag by morphing wing shape, to minimize wing root bending moment by scheduling flap rotations (a surrogate for weight reduction), and to minimize the takeoff ground roll distance. Particle swarm optimization and gradient-based optimization are used, respectively, in the upper-level and the lower-level optimization problems. Optimization results show that the wing box with SpaRibs can further improve the aircraft performances, especially in a large weight saving, as compared to the wing with traditional spars and ribs. Additionally, the nonuniform chord control surface associated with the wing with SpaRibs achieve further reductions in structural weight, total drag and takeoff ground roll distance for an improved aircraft performance. For a further improvement of the global wing skin panel design, an efficient finite element approach is… Advisors/Committee Members: Kapania, Rakesh K. (committeechair), Singh, Mahendra P. (committee member), Canfield, Robert Arthur (committee member), Patil, Mayuresh J. (committee member).

Subjects/Keywords: SpaRibs; bilevel programming optimization; aeroelastic tailoring; active aeroelastic wing; curvilinearly stiffened composite panel

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APA (6^th Edition):

Zhao, W. (2017). Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/79143

Chicago Manual of Style (16^th Edition):

Zhao, Wei. “Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings.” 2017. Doctoral Dissertation, Virginia Tech. Accessed January 19, 2021. http://hdl.handle.net/10919/79143.

MLA Handbook (7^th Edition):

Zhao, Wei. “Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings.” 2017. Web. 19 Jan 2021.

Vancouver:

Zhao W. Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings. [Internet] [Doctoral dissertation]. Virginia Tech; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10919/79143.

Council of Science Editors:

Zhao W. Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings. [Doctoral Dissertation]. Virginia Tech; 2017. Available from: http://hdl.handle.net/10919/79143

Brno University of Technology

28. Leupold, Karel. Mateřská školka: Nursery School.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/37837

► The master’s thesis on the topic Kindergarten is processed in the form of project documentation for the implementation of the new building. The building is… (more)

Subjects/Keywords: Mateřská školka; plochá střecha; zděný nosný systém; předpjatý stropní panel; dvoupodlažní budova; terasa.; Kindergarten; flat roof; brick support system; prestressed ceiling panel; two-storey building; terrace.

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APA (6^th Edition):

Leupold, K. (2019). Mateřská školka: Nursery School. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/37837

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Leupold, Karel. “Mateřská školka: Nursery School.” 2019. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/37837.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Leupold, Karel. “Mateřská školka: Nursery School.” 2019. Web. 19 Jan 2021.

Vancouver:

Leupold K. Mateřská školka: Nursery School. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/37837.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Leupold K. Mateřská školka: Nursery School. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/37837

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

29. Žižková, Martina. Mateřská škola Barevný svět: Barevný svět kindergarten.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/64535

► The objective of the diploma thesis is to prepare a study of a kindergarten. The kindergarten is designed for 72 children and is located on… (more)

Subjects/Keywords: mateřská škola; plochá střecha; nepodsklepený; jednopodlažní; Porotherm; betonové základové pasy; předpjatý stropní panel; kindergarten; flat roof; basement; single storey; porotherm; concrete footings; prestressed ceiling panel

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APA (6^th Edition):

Žižková, M. (2019). Mateřská škola Barevný svět: Barevný svět kindergarten. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/64535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Žižková, Martina. “Mateřská škola Barevný svět: Barevný svět kindergarten.” 2019. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/64535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Žižková, Martina. “Mateřská škola Barevný svět: Barevný svět kindergarten.” 2019. Web. 19 Jan 2021.

Vancouver:

Žižková M. Mateřská škola Barevný svět: Barevný svět kindergarten. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/64535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Žižková M. Mateřská škola Barevný svět: Barevný svět kindergarten. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/64535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

30. Kozáková, Martina. Polyfunkční dům: Multifunctional Building.

Degree: 2020, Brno University of Technology

URL: http://hdl.handle.net/11012/57684

► The diploma thesis is based on design of a multifunctional building in Lazany. The object is situated in a build-up area. There is the patisserie… (more)

Subjects/Keywords: polyfunkčný dom stavebný systém základové pásy prostý betón stropný panel plochá strecha; multifunctional building building system footings plain concrete ceiling panel flat roof

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APA (6^th Edition):

Kozáková, M. (2020). Polyfunkční dům: Multifunctional Building. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/57684

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kozáková, Martina. “Polyfunkční dům: Multifunctional Building.” 2020. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/57684.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kozáková, Martina. “Polyfunkční dům: Multifunctional Building.” 2020. Web. 19 Jan 2021.

Vancouver:

Kozáková M. Polyfunkční dům: Multifunctional Building. [Internet] [Thesis]. Brno University of Technology; 2020. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/57684.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kozáková M. Polyfunkční dům: Multifunctional Building. [Thesis]. Brno University of Technology; 2020. Available from: http://hdl.handle.net/11012/57684

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations