subject:(high frequency)

1. Uratani, Yuka; Nishimura, Tadashi; Ohara, Nari; Yamanaka, Toshiaki. Left-right difference in high frequency sensitivity : application for unilateral cochlear disorder evaluation. : 高周波聴力の左右差 : 一側性の蝸牛障害の評価への応用.

Degree: 博士（医学）, 2014, Nara Medical University / 奈良県立医科大学

URL: http://hdl.handle.net/10564/2696

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High-frequency audiometry has the potential to detect hearing impairment at its early stage. However, several problems prevent the clinical application of high-frequency audiometry. In this… (more)

Subjects/Keywords: high frequency audiometry; high frequency sound; tinnitus

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APA (6^th Edition):

Uratani, Yuka; Nishimura, Tadashi; Ohara, Nari; Yamanaka, T. (2014). Left-right difference in high frequency sensitivity : application for unilateral cochlear disorder evaluation. : 高周波聴力の左右差 : 一側性の蝸牛障害の評価への応用. (Thesis). Nara Medical University / 奈良県立医科大学. Retrieved from http://hdl.handle.net/10564/2696

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):

Uratani, Yuka; Nishimura, Tadashi; Ohara, Nari; Yamanaka, Toshiaki. “Left-right difference in high frequency sensitivity : application for unilateral cochlear disorder evaluation. : 高周波聴力の左右差 : 一側性の蝸牛障害の評価への応用.” 2014. Thesis, Nara Medical University / 奈良県立医科大学. Accessed October 14, 2019. http://hdl.handle.net/10564/2696.

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

MLA Handbook (7^th Edition):

Uratani, Yuka; Nishimura, Tadashi; Ohara, Nari; Yamanaka, Toshiaki. “Left-right difference in high frequency sensitivity : application for unilateral cochlear disorder evaluation. : 高周波聴力の左右差 : 一側性の蝸牛障害の評価への応用.” 2014. Web. 14 Oct 2019.

Vancouver:

Uratani, Yuka; Nishimura, Tadashi; Ohara, Nari; Yamanaka T. Left-right difference in high frequency sensitivity : application for unilateral cochlear disorder evaluation. : 高周波聴力の左右差 : 一側性の蝸牛障害の評価への応用. [Internet] [Thesis]. Nara Medical University / 奈良県立医科大学; 2014. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10564/2696.

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

Council of Science Editors:

Uratani, Yuka; Nishimura, Tadashi; Ohara, Nari; Yamanaka T. Left-right difference in high frequency sensitivity : application for unilateral cochlear disorder evaluation. : 高周波聴力の左右差 : 一側性の蝸牛障害の評価への応用. [Thesis]. Nara Medical University / 奈良県立医科大学; 2014. Available from: http://hdl.handle.net/10564/2696

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

2. Martinelli, Sheri L. A Level-Sets-Based Wavefront Propagation Method for Underwater Acoustics.

Degree: PhD, Applied Mathematics, 2012, Brown University

URL: https://repository.library.brown.edu/studio/item/bdr:297523/

► Computer models for underwater sound propagation often rely on ray tracing to obtain solutions to the high frequency wave equation. While adequate for large scale… (more)

▼ Computer models for underwater sound propagation often rely on ray tracing to obtain solutions to the high frequency wave equation. While adequate for large scale results in deep water environments, ray tracing has drawbacks that limit its reliability for simulations involving multiple boundary interactions and in studies concerning the effects of unmodeled physical processes. This work presents the development and application of the level set method to the high frequency wave equation with the intent of providing a framework for wavefront propagation in underwater acoustics as a valuable alternative to ray tracing. Level set methods are generic, computational models for solving dynamic interface problems. The model regularizes problems which exhibit behavior that is difficult to capture numerically in physical space by posing the problem in the higher-dimensional phase space. A relevant example is the behavior of self-intersecting wavefronts; in physical space, such solutions are multiple-valued. The level set method represents the interface implicitly as the zero level set of some function in the phase space, then propagates the surface according to a problem-dependent velocity field. Although the problem is posed in a higher dimensional space, the quantities of interest are local to the interface. Thus the computational burden may be reduced by solving the level set equations only in a neighborhood of the zero level set. The behavior of solutions at a reflecting boundary motivates the application of WENO methods, which are known to perform well on problems involving shocks. Since WENO methods are complicated to implement on irregular grids, two methods for applying reflection boundary conditions at an interface embedded within a Cartesian grid are proposed. In addition, this work develops a method for computing spreading loss via a semi-Lagrangian approach using the wavefronts provided by the level set solutions. A final topic is the application of a stochastic collocation method to study the effect of random perturbations in the wave speed on the wavefront propagation algorithm. Verification against a full wave equation solver and ray tracing software shows that the resulting method provides accurate wavefront information in the presence of multi-path propagation. Advisors/Committee Members: Hesthaven, Jan (Director), Shu, Chi-Wang (Reader), Siegmann, William (Reader).

Subjects/Keywords: high frequency acoustics

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APA (6^th Edition):

Martinelli, S. L. (2012). A Level-Sets-Based Wavefront Propagation Method for Underwater Acoustics. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:297523/

Chicago Manual of Style (16^th Edition):

Martinelli, Sheri L. “A Level-Sets-Based Wavefront Propagation Method for Underwater Acoustics.” 2012. Doctoral Dissertation, Brown University. Accessed October 14, 2019. https://repository.library.brown.edu/studio/item/bdr:297523/.

MLA Handbook (7^th Edition):

Martinelli, Sheri L. “A Level-Sets-Based Wavefront Propagation Method for Underwater Acoustics.” 2012. Web. 14 Oct 2019.

Vancouver:

Martinelli SL. A Level-Sets-Based Wavefront Propagation Method for Underwater Acoustics. [Internet] [Doctoral dissertation]. Brown University; 2012. [cited 2019 Oct 14]. Available from: https://repository.library.brown.edu/studio/item/bdr:297523/.

Council of Science Editors:

Martinelli SL. A Level-Sets-Based Wavefront Propagation Method for Underwater Acoustics. [Doctoral Dissertation]. Brown University; 2012. Available from: https://repository.library.brown.edu/studio/item/bdr:297523/

University of Southern California

3. Wu, Dawei. Development of high-frequency (~100mhz) PZT thick-film ultrasound transducers and arrays.

Degree: PhD, Biomedical Engineering, 2009, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/254740/rec/1940

► Fabrication of high-frequency (30 MHz -50 MHz) ultrasonic linear arrays is still a challenge. The task is even more difficult to build arrays at a… (more)

▼ Fabrication of high-frequency (30 MHz -50 MHz) ultrasonic linear arrays is still a challenge. The task is even more difficult to build arrays at a frequency higher than 100 MHz, which has the potential to provide more detail skin texture for early diagnosis of melanoma or to image small objects such as stem cells. Integrating of PZT films into MEMS micro-machined is a potential solution to such high-frequency applications. This thesis presents the development of high-frequency (~100 MHz) PZT thick-film transducers and arrays.; PZT thick films thicker than 10 µm were fabricated with a composite spin-coating method. The functional properties of the films were improved by optimization of composite solution ball-milling time, PZT sol-gel to powder mass ratio and sol-gel infiltration process. Films suitable for high frequency ultrasonic transducer applications were produced and characterized. The films were found to have a remanent polarization of 37 µC/cm2, a dielectric constant of 1250 (at 1 kHz), and electromechanical coupling coefficient (kt) of 0.34.; High-frequency (~100 MHz) single-element transducers and linear arrays were afterwards fabricated with the PZT films. The single-element transducer was constructed by transferring the film from silicon substrate to E-solder backing material. The finished transducer was found to have a center frequency of 120 MHz and a bandwidth of 60% with a layer of parylene. Ultrasonic images of the porcine eyeball and normal human skin were also successfully acquired with the transducer. 32-element kerfless high-frequency linear array was fabricated with a 12-µm PZT film by photolithography. The array had a center frequency of 120 MHz, a bandwidth of 60% with parylene matching and an insertion loss of 41 dB. Performance of the array was compared to a PZT-5H ceramic sheet kerfless array fabricated with an identical array pattern.; The development of 32-element kerfed arrays was also presented. DRIE dry-etching technique was investigated to produce an array with sharp element edges (profile angle > 85º) and narrow kerf ( ~12 µm). The kerfed array shows similar performance with kerfless one, except the crosstalk is ~5 dB lower. Advisors/Committee Members: Shung, K. Kirk (Committee Chair), Zhou, Qifa (Committee Member), Yen, Jesse T. (Committee Member), Sadhal, Satwindar S. (Committee Member), Chen, Yong (Committee Member).

Subjects/Keywords: high-frequency; PZT film; ultrasonic

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APA (6^th Edition):

Wu, D. (2009). Development of high-frequency (~100mhz) PZT thick-film ultrasound transducers and arrays. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/254740/rec/1940

Chicago Manual of Style (16^th Edition):

Wu, Dawei. “Development of high-frequency (~100mhz) PZT thick-film ultrasound transducers and arrays.” 2009. Doctoral Dissertation, University of Southern California. Accessed October 14, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/254740/rec/1940.

MLA Handbook (7^th Edition):

Wu, Dawei. “Development of high-frequency (~100mhz) PZT thick-film ultrasound transducers and arrays.” 2009. Web. 14 Oct 2019.

Vancouver:

Wu D. Development of high-frequency (~100mhz) PZT thick-film ultrasound transducers and arrays. [Internet] [Doctoral dissertation]. University of Southern California; 2009. [cited 2019 Oct 14]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/254740/rec/1940.

Council of Science Editors:

Wu D. Development of high-frequency (~100mhz) PZT thick-film ultrasound transducers and arrays. [Doctoral Dissertation]. University of Southern California; 2009. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/254740/rec/1940

Stellenbosch University

4. Rossouw, Daniel Johannes. Probes in HF metrology.

Degree: Electrical and Electronic Engineering, 2010, Stellenbosch University

URL: http://hdl.handle.net/10019.1/5425

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Thesis (MScEng (Electrical and Electronic Engineering)) – University of Stellenbosch, 2010.

ENGLISH ABSTRACT: Flanged coaxial probes are widely used to conduct accurate, broadband permittivity measurements of… (more)

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Thesis (MScEng (Electrical and Electronic Engineering)) – University of Stellenbosch, 2010.

ENGLISH ABSTRACT: Flanged coaxial probes are widely used to conduct accurate, broadband permittivity measurements of various dielectric materials. A metrology study, discussed in [1], revealed that small perturbations in measured permittivity data, are due to escaping common-mode (CM) current that propagates onto exposed VNA feed cabling. This is not considered in published permittivity extraction algorithms, like the National Institute of Standards and Technology (NIST) full-wave code that assumes an infinite flange radius. To characterise this effect we validate a finite volume time domain (FVTD) CST simulation model of an SMA coaxial probe, by probing sensitive E-fields in a metallic shielding cylinder, placed around it. For this process, electro-optic (EO) E-field sensors are considered and a Mach-Zehnder type sensor is designed. Manufacturing difficulties discontinues this approach, but the revisited extended centre conductor E-field probing technique proves successful. The technique entails a high dynamic range, two-port VNA measurement. Through CST we gain knowledge of the physics behind the CM-problem and the behaviour of fields around the coaxial probe. Different shielding environments are simulated to establish their ability to impede CM-current coupling onto measurement cabling. To study the CM-effect on extracted permittivity results, the investigation is extended to Short-Open-Load (SOL) calibrated face-plane measurements of dielectric solids. A CST model, which considers escaping CM-energy, is used to generate open circuit (OC) calibration coefficients and to serve as an independent extraction method. We inspect the effect of different shielding environments and through CST, extract accurate permittivity results for e00, to a degree not previously achieved for such systems. This allows comment on the infinite-flange-radius assumption of the NIST method and proves the significance of the CM-effect.

AFRIKAANSE OPSOMMING: Geflensde koaksiale probes word algemeen in die praktyk gebruik om akkurate, wyeband permitiwiteitmetings van diëlektriese materiale te verrig. ’n Studie wat in [1] bespreek word, dui aan dat klein verskynsels in gemete resultate, verband hou met gemene-modus (GM) stroom, wat ontsnap en teenwoording is aan die buitekant van onbeskermde voerkabels. Hierdie verkynsel word nie deur huidige volgolf ekstraksie-algoaritmes, soos die van NIST wat ’n onëindige flensradius aanvaar, in ag geneem nie. Om die GM-effek te karakteriseer, verifieer ons ’n eindige-volume tyd-gebied CST simulasiemodel, deur sensitiewe metings binne ’n silidriese metaalskerm, wat om so ’n probe geplaas word. Vir hierdie meting word elektro-optiese E-veld probes eers oorweeg. In gevolg word ’n Mach-Zehnder-tipe probe ontwerp, maar vervaardigingsprobleme en tyd-oorwegings kniehalter hierdie benadering. Heroorweging van die verlengde koaksiale sentraalgeleier, E-veld-probe tegniek, wat hoë…

Advisors/Committee Members: Reader, H. C., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: Electronic engineering; Metrology; High frequency

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APA (6^th Edition):

Rossouw, D. J. (2010). Probes in HF metrology. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/5425

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):

Rossouw, Daniel Johannes. “Probes in HF metrology.” 2010. Thesis, Stellenbosch University. Accessed October 14, 2019. http://hdl.handle.net/10019.1/5425.

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

MLA Handbook (7^th Edition):

Rossouw, Daniel Johannes. “Probes in HF metrology.” 2010. Web. 14 Oct 2019.

Vancouver:

Rossouw DJ. Probes in HF metrology. [Internet] [Thesis]. Stellenbosch University; 2010. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10019.1/5425.

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

Council of Science Editors:

Rossouw DJ. Probes in HF metrology. [Thesis]. Stellenbosch University; 2010. Available from: http://hdl.handle.net/10019.1/5425

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

5. Bajor, Eric J. High-Frequency Broadband Seafloor Backscatter in a Sandy Estuarine Environment.

Degree: MS, Mechanical Engineering, 2015, University of New Hampshire

URL: https://scholars.unh.edu/thesis/5

► Seafloor backscatter collected with high-frequency (> 100 kHz) hydrographic echosounders has become an important aspect of seafloor characterization for benthic ecologists and other scientists.… (more)

Subjects/Keywords: backscatter; estuarine; high-frequency

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APA (6^th Edition):

Bajor, E. J. (2015). High-Frequency Broadband Seafloor Backscatter in a Sandy Estuarine Environment. (Thesis). University of New Hampshire. Retrieved from https://scholars.unh.edu/thesis/5

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):

Bajor, Eric J. “High-Frequency Broadband Seafloor Backscatter in a Sandy Estuarine Environment.” 2015. Thesis, University of New Hampshire. Accessed October 14, 2019. https://scholars.unh.edu/thesis/5.

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

MLA Handbook (7^th Edition):

Bajor, Eric J. “High-Frequency Broadband Seafloor Backscatter in a Sandy Estuarine Environment.” 2015. Web. 14 Oct 2019.

Vancouver:

Bajor EJ. High-Frequency Broadband Seafloor Backscatter in a Sandy Estuarine Environment. [Internet] [Thesis]. University of New Hampshire; 2015. [cited 2019 Oct 14]. Available from: https://scholars.unh.edu/thesis/5.

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

Council of Science Editors:

Bajor EJ. High-Frequency Broadband Seafloor Backscatter in a Sandy Estuarine Environment. [Thesis]. University of New Hampshire; 2015. Available from: https://scholars.unh.edu/thesis/5

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

University of Southern California

6. Kang, Bong Jin. High-frequency ultrasound array-based imaging system for biomedical applications.

Degree: PhD, Biomedical Engineering, 2015, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/562902/rec/3177

► High frequency ultrasound imaging, capable of achieving superior spatial resolution in real-time, has been shown to be useful for imaging and visualizing blood flow in… (more)

▼ High frequency ultrasound imaging, capable of achieving superior spatial resolution in real-time, has been shown to be useful for imaging and visualizing blood flow in ophthalmology, dermatology, and small animal research. The utilization of high frequency array-based imaging system can alleviate the limitations of the systems with single element transducers. This dissertation presents an investigation of high frequency array-based imaging system and its potential biomedical applications. The system is capable of B-mode imaging, PW-Doppler, color Doppler imaging, and RF data acquisition. Three different types of high frequency (30 MHz 256-element linear, 20 MHz 192-element convex, and 20 MHz 48-element phased) array transducers were implemented on the array-based imaging system. The system was also utilized for ophthalmic imaging: 30 MHz linear array for anterior segment and 20 MHz convex array for both anterior and posterior segments imaging of the eye. Anatomical structures, such as cornea, iris, ciliary body, lens, and retina, choroid, and sclera layers were identified. The high frequency PW Doppler and micro-ECG were integrated to assess the ventricular diastolic function during heart regeneration of the adult zebrafish. Synchronized PW Doppler with ECG signals confirmed the A-wave in response to atrial contraction (P wave in ECG), E-wave in response to ventricular relaxation (T wave in ECG), and ventricular outflow in response to ventricular contraction (QRS complex in ECG). The E/A ratio is less than 1 in zebrafish at baseline, reflecting a higher active filling (A-wave) than passive filling (E-wave) velocities in the two-chamber heart system. High frequency dual mode pulsed-wave Doppler imaging, which provides both tissue Doppler and Doppler flow in a same cardiac cycle, was implemented on the array-based imaging system for monitoring the functional regeneration of adult zebrafish hearts. In the in vivo study of zebrafish, both tissue Doppler and flow Doppler signals were simultaneously obtained and the synchronized valve motions with the blood flow were identified. In the longitudinal study on the zebrafish heart regeneration, the parameters for diagnosing the diastolic dysfunction were measured, and the type of diastolic dysfunction caused by the amputation was found to be similar to the restrictive filling. The diastolic function was fully recovered within four weeks post-amputation. High frequency color Doppler imaging was implemented on the array-based imaging system and evaluated by the flow phantom and adult zebrafish in vivo studies. In the flow phantom study, constant velocity with opposite flow directions was detected utilizing color Doppler imaging. Also, color Doppler imaging could be used to monitor blood flows inside adult zebrafish heart and flow directions were clearly identified by the color-coded images. Advisors/Committee Members: Shung, Kirk Koping (Committee Chair), Yen, Jesse T. (Committee Member), Kuo, C. C. Jay (Committee Member).

Subjects/Keywords: high-frequency ultrasound; high-frequency ultrasound array-based imaging system; high-frequency ultrasound pulsed-wave Doppler; high-frequency ultrasound color Doppler

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

APA (6^th Edition):

Kang, B. J. (2015). High-frequency ultrasound array-based imaging system for biomedical applications. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/562902/rec/3177

Chicago Manual of Style (16^th Edition):

Kang, Bong Jin. “High-frequency ultrasound array-based imaging system for biomedical applications.” 2015. Doctoral Dissertation, University of Southern California. Accessed October 14, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/562902/rec/3177.

MLA Handbook (7^th Edition):

Kang, Bong Jin. “High-frequency ultrasound array-based imaging system for biomedical applications.” 2015. Web. 14 Oct 2019.

Vancouver:

Kang BJ. High-frequency ultrasound array-based imaging system for biomedical applications. [Internet] [Doctoral dissertation]. University of Southern California; 2015. [cited 2019 Oct 14]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/562902/rec/3177.

Council of Science Editors:

Kang BJ. High-frequency ultrasound array-based imaging system for biomedical applications. [Doctoral Dissertation]. University of Southern California; 2015. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/562902/rec/3177

University of New South Wales

7. Tria, Lew Andrew. Modelling and design of planar PCB transformers for high-frequency DC-DC converters.

Degree: Electrical Engineering & Telecommunications, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/59153 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48544/SOURCE02?view=true

► The demand for high density power supplies has been increasing through the years. The most common trend in achieving high power density is to use… (more)

▼ The demand for high density power supplies has been increasing through the years. The most common trend in achieving high power density is to use high frequency switching which results in smaller component size. However, for the magnetic components, operation at high frequencies leads to increased conductor losses due to skin and proximity effects. The use of planar transformers on printed circuit boards (PCB) can mitigate this problem. The thinner and wider conductors of PCBs assist in reducing high-frequency losses. With larger surface areas, planar transformers also offer better thermal performance than conventional wire-wound magnetics. In this thesis, research activities to further the technology of planar PCB transformer are presented. These research activities are aimed at improving the modelling, design and utilization of planar PCB transformers for high-frequency power converters. A new non-linear model of planar PCB magnetics was developed to model the winding loss, core loss, and saturation characteristics. The developed model can be implemented in a circuit simulation package which can be used to predict the performance of the PCB transformer in a power converter system. The model was also used to derive the high-frequency electrical parameters of a PCB transformer. The model-derived parameters were proven to be comparable to LCR measurement and results obtained using finite element analysis. A stochastic method of estimating the electric parameters of a PCB transformer, based on differential evolution, was also developed. The developed method was shown to be a potential alternative to resource-intensive numerical methods. Existing guidelines for the design of PCB transformers are evaluated using finite element analysis and validated in a prototype transformer. Results of the evaluation show that the existing guidelines result in over-design of PCB transformers. For higher power applications, using the high-frequency advantage of PCB transformers, methods to implement multiple planar PCB transformers, including the concept of matrix transformer, are presented and compared. Through the evaluated design guidelines, prototypes of multiple core transformers were fabricated and characterised in a power converter system. Result of the comparison of the different implementations showed that the trade-off is between high-frequency losses and thermal dissipation. Advisors/Committee Members: Zhang, Daming, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Fletcher, John, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.

Subjects/Keywords: PCB transformers; High-frequency magnetics

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APA (6^th Edition):

Tria, L. A. (2017). Modelling and design of planar PCB transformers for high-frequency DC-DC converters. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/59153 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48544/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Tria, Lew Andrew. “Modelling and design of planar PCB transformers for high-frequency DC-DC converters.” 2017. Doctoral Dissertation, University of New South Wales. Accessed October 14, 2019. http://handle.unsw.edu.au/1959.4/59153 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48544/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Tria, Lew Andrew. “Modelling and design of planar PCB transformers for high-frequency DC-DC converters.” 2017. Web. 14 Oct 2019.

Vancouver:

Tria LA. Modelling and design of planar PCB transformers for high-frequency DC-DC converters. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2019 Oct 14]. Available from: http://handle.unsw.edu.au/1959.4/59153 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48544/SOURCE02?view=true.

Council of Science Editors:

Tria LA. Modelling and design of planar PCB transformers for high-frequency DC-DC converters. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/59153 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48544/SOURCE02?view=true

University of Toronto

8. Jeon, Yoontae. High Frequency Trading in a Regime-switching Model.

Degree: 2010, University of Toronto

URL: http://hdl.handle.net/1807/25636

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One of the most famous problem of finding optimal weight to maximize an agent's expected terminal utility in finance literature is Merton's optimal portfolio problem.… (more)

Subjects/Keywords: High Frequency; Regime Switching; 0405

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APA (6^th Edition):

Jeon, Y. (2010). High Frequency Trading in a Regime-switching Model. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/25636

Chicago Manual of Style (16^th Edition):

Jeon, Yoontae. “High Frequency Trading in a Regime-switching Model.” 2010. Masters Thesis, University of Toronto. Accessed October 14, 2019. http://hdl.handle.net/1807/25636.

MLA Handbook (7^th Edition):

Jeon, Yoontae. “High Frequency Trading in a Regime-switching Model.” 2010. Web. 14 Oct 2019.

Vancouver:

Jeon Y. High Frequency Trading in a Regime-switching Model. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1807/25636.

Council of Science Editors:

Jeon Y. High Frequency Trading in a Regime-switching Model. [Masters Thesis]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/25636

University of Waterloo

9. Khanali, Mahdi. Effects of Distorted Voltages on the Performance of Renewable Energy Plant Transformers.

Degree: 2017, University of Waterloo

URL: http://hdl.handle.net/10012/12368

► The significant global growth in renewable energy production has led to increasing concerns about the problems associated with electrical equipment in power plants connected with… (more)

▼ The significant global growth in renewable energy production has led to increasing concerns about the problems associated with electrical equipment in power plants connected with this type of energy. The crucial electrical components of renewable energy generation are step-up transformers, with respect to which, gassing problems and premature insulation failures have been extensively reported in recent years. One of the factors related to the reported problems is the presence of high-frequency high-dV/dt voltages that are created by switching operations in wind energy plants. Addressing this challenge necessitates the investigation of transformer insulation systems under high-dV/dt pulse voltages. This thesis presents research undertaken in order to examine the performance of wind turbine step-up transformers under distorted voltages, with consideration of internal resonance phenomena and high-frequency dielectric effects. To evaluate the effect of distorted voltage on the acceleration of the ageing process in transformers, model transformers have been aged under distorted power converter voltage as well as under pure sinusoidal power grid voltage. Relevant parameters are monitored as indicators of the condition of the transformer insulation, and the results are compared throughout the ageing period. In addition, to study the transformer behavior under high-frequency high-dV/dt voltages, a detailed high-frequency model is necessary. High frequency modeling of large power transformers is complex and time-consuming due to their sizes. Therefore, as an alternative approach, this work proposes a modeling method that considers the high-frequency behavior of a scale down model transformer, and then relates it to the behavior of the actual size transformer. To verify the proposed modelling method, an experimental study investigates the correlations between the frequency responses of the two model transformers of different power ratings and sizes. Comparison of the frequency responses of the scaled and original transformers validates the proposed approach of scaling transformers for high-frequency study. High-frequency measurements are performed on an actual wind turbine transformer to represent a linear wideband black-box model of wind turbine step-up transformer in an electromagnetic transient study. Using the simulation results for switching impulsive waveforms imposed on wind turbine transformers due to the adjacent breakers operations, this work evaluates the effects of impulsive voltage parameters such as rate of rise and repetition frequency on inception voltage and intensity of partial discharge, generally assumed to be the main long-term cause of insulation deterioration. Partial discharge parameter measurement under high-dV/dt voltages is challenging due to interferences from fast oscillations, and difficulties of PD energy measurements. To avoid such issues, which are related to electromagnetic detection methods under pulse energization, this work uses a chemical approach to compare PD, based on the rate of…

Subjects/Keywords: Transformer; high frequency; Insulation; High frequency effects; Frequency response analysis; Renewable energy

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APA (6^th Edition):

Khanali, M. (2017). Effects of Distorted Voltages on the Performance of Renewable Energy Plant Transformers. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/12368

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):

Khanali, Mahdi. “Effects of Distorted Voltages on the Performance of Renewable Energy Plant Transformers.” 2017. Thesis, University of Waterloo. Accessed October 14, 2019. http://hdl.handle.net/10012/12368.

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

MLA Handbook (7^th Edition):

Khanali, Mahdi. “Effects of Distorted Voltages on the Performance of Renewable Energy Plant Transformers.” 2017. Web. 14 Oct 2019.

Vancouver:

Khanali M. Effects of Distorted Voltages on the Performance of Renewable Energy Plant Transformers. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10012/12368.

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

Council of Science Editors:

Khanali M. Effects of Distorted Voltages on the Performance of Renewable Energy Plant Transformers. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/12368

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

Texas A&M University

10. Sridharan, Rajasekaran. Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-8025

► The concrete maturity method can be utilized to determine in situ strength of concrete. It uses the temperature of concrete to determine a maturity index… (more)

Subjects/Keywords: LF Low frequency; HF High frequency; UHF Ultra High frequency; RFID Radio Frequency Identification; Concrete maturity

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APA (6^th Edition):

Sridharan, R. (2011). Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-8025

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):

Sridharan, Rajasekaran. “Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete.” 2011. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-8025.

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

MLA Handbook (7^th Edition):

Sridharan, Rajasekaran. “Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete.” 2011. Web. 14 Oct 2019.

Vancouver:

Sridharan R. Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-8025.

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

Council of Science Editors:

Sridharan R. Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-8025

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

University of Leicester

11. Jackson, Clive Andrew. Combined channel sounding and direction finding studies of HF radio propagation effects observed over high latitude communication paths.

Degree: PhD, 2003, University of Leicester

URL: http://hdl.handle.net/2381/30208

► The high latitude ionosphere is a dynamic region that is subject to a variety of disturbed conditions affecting oblique propagation of HF radio signals. Multipath… (more)

▼ The high latitude ionosphere is a dynamic region that is subject to a variety of disturbed conditions affecting oblique propagation of HF radio signals. Multipath and off great circle propagation resulting from rough ionospheric reflecting surfaces introduce time dispersion, while movements in the ionosphere impose Doppler dispersion. These effects, when combined, result in very complex signal characteristics, which cause degradation to the performance of communication systems if the delay or Doppler dispersion exceeds system dependent bounds.;Results are presented based around measurements of signals, produced by the Doppler And Multipath SOunding Network, recorded using a six channel spaced array receiving system, during a 10 day campaign at Kiruna in March 1998. In addition to delay and Doppler processing, the directions of arrival (DOA) of the signal components were estimated using a super resolution direction finding algorithm.;Most signals were narrow in delay and Doppler, however a significant statistical spread in their DOA was observed. Statistics on the occurrence and characteristics of the remaining signals revealed that trends in DOA are often associated with complex delay and Doppler propagation. A number of cases had Doppler spread exceeding a specified Doppler boundary of operation, while none exceeded the delay spread boundary.;Case studies revealed detailed propagation effects. Of particular interest is the often observed East â†’ West trend in DOA with Doppler offset. This is attributed to scattering from irregularities embedded in turbulent bulk convection flows. E-region modes with good spectral and geographic distribution of signal energy are often observed in otherwise complex cases.;Spatial filtering, using two or three element arrays was investigated and found to be effective at reducing large Doppler spreads to lower values more amenable to high data rate communication systems. Fast solver spatial filtering methods were found to be very robust, effective and a lot quicker.

Subjects/Keywords: 621; High frequency

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APA (6^th Edition):

Jackson, C. A. (2003). Combined channel sounding and direction finding studies of HF radio propagation effects observed over high latitude communication paths. (Doctoral Dissertation). University of Leicester. Retrieved from http://hdl.handle.net/2381/30208

Chicago Manual of Style (16^th Edition):

Jackson, Clive Andrew. “Combined channel sounding and direction finding studies of HF radio propagation effects observed over high latitude communication paths.” 2003. Doctoral Dissertation, University of Leicester. Accessed October 14, 2019. http://hdl.handle.net/2381/30208.

MLA Handbook (7^th Edition):

Jackson, Clive Andrew. “Combined channel sounding and direction finding studies of HF radio propagation effects observed over high latitude communication paths.” 2003. Web. 14 Oct 2019.

Vancouver:

Jackson CA. Combined channel sounding and direction finding studies of HF radio propagation effects observed over high latitude communication paths. [Internet] [Doctoral dissertation]. University of Leicester; 2003. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/2381/30208.

Council of Science Editors:

Jackson CA. Combined channel sounding and direction finding studies of HF radio propagation effects observed over high latitude communication paths. [Doctoral Dissertation]. University of Leicester; 2003. Available from: http://hdl.handle.net/2381/30208

University of Exeter

12. Shi, Zhangbo. High frequency and large dimension volatility.

Degree: PhD, 2010, University of Exeter

URL: http://hdl.handle.net/10036/117791

► Three main issues are explored in this thesis—volatility measurement, volatility spillover and large-dimension covariance matrices. For the first question of volatility measurement, this thesis compares… (more)

▼ Three main issues are explored in this thesis—volatility measurement, volatility spillover and large-dimension covariance matrices. For the first question of volatility measurement, this thesis compares two newly-proposed, high-frequency volatility measurement models, namely realized volatility and realized range-based volatility. It does so in the aim of trying to use empirical results to assess whether one volatility model is better than the other. The realized volatility model and realized range-based volatility model are compared based on three markets, five forecast models, two data frequencies and two volatility proxies, making sixty scenarios in total. Seven different loss functions are also used for the evaluation tests. This necessarily ensures that the empirical results are highly robust. After making some simple adjustments to the original realized range-based volatility, this thesis concludes that it is clear that the scaled realized range-based volatility model outperforms the realized volatility model. For the second research question on volatility spillover, realized range-based volatility and realized volatility models are employed to study the volatility spillover among the S&P 500 index markets, with the aim of finding out empirically whether volatility spillover exists between the markets. Volatility spillover is divided into the two categories of statistically significant volatility spillover and economically significant volatility spillover. Economically significant spillover is defined as spillover that can help forecast the volatility of another market, and is therefore a more powerful measurement than statistically significant spillover. The findings show that, in reality, the existence of volatility spillover depends on the choice of model, choice of volatility proxy and value of parameters used. The third and final research question in this thesis involves the comparison of various large-dimension multivariate models. The main contribution made by this specific study is threefold. First, a number of good performance multivariate volatility models are introduced by adjusting some commonly used models. Second, different models and various choices of parameters for these models are tested based on 26 currency pairs. Third, the evaluation criteria adopted possess much more practical implications than those used in most other papers on this subject area.

Subjects/Keywords: 330.015195; high frequency volatility : covariance matrix

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APA (6^th Edition):

Shi, Z. (2010). High frequency and large dimension volatility. (Doctoral Dissertation). University of Exeter. Retrieved from http://hdl.handle.net/10036/117791

Chicago Manual of Style (16^th Edition):

Shi, Zhangbo. “High frequency and large dimension volatility.” 2010. Doctoral Dissertation, University of Exeter. Accessed October 14, 2019. http://hdl.handle.net/10036/117791.

MLA Handbook (7^th Edition):

Shi, Zhangbo. “High frequency and large dimension volatility.” 2010. Web. 14 Oct 2019.

Vancouver:

Shi Z. High frequency and large dimension volatility. [Internet] [Doctoral dissertation]. University of Exeter; 2010. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10036/117791.

Council of Science Editors:

Shi Z. High frequency and large dimension volatility. [Doctoral Dissertation]. University of Exeter; 2010. Available from: http://hdl.handle.net/10036/117791

University of Alberta

13. Lu,huihong. Design, Fabrication, and Testing of High-Frequency High-Numerical-Aperture Annular Array Transducer for Improved Depth-of-Field Photoacoustic Microscopy.

Degree: MS, Department of Electrical and Computer Engineering, 2012, University of Alberta

URL: https://era.library.ualberta.ca/files/wh246t10x

► Researchers have been using single-element transducers for photoacoustic microscopy (PAM), but such systems have limited depth-of-field due to single focus. This project was to develop… (more)

Subjects/Keywords: high-frequency; annular-array; ultrasound-transducer

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APA (6^th Edition):

Lu,huihong. (2012). Design, Fabrication, and Testing of High-Frequency High-Numerical-Aperture Annular Array Transducer for Improved Depth-of-Field Photoacoustic Microscopy. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/wh246t10x

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

Lu,huihong. “Design, Fabrication, and Testing of High-Frequency High-Numerical-Aperture Annular Array Transducer for Improved Depth-of-Field Photoacoustic Microscopy.” 2012. Masters Thesis, University of Alberta. Accessed October 14, 2019. https://era.library.ualberta.ca/files/wh246t10x.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

Lu,huihong. “Design, Fabrication, and Testing of High-Frequency High-Numerical-Aperture Annular Array Transducer for Improved Depth-of-Field Photoacoustic Microscopy.” 2012. Web. 14 Oct 2019.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Lu,huihong. Design, Fabrication, and Testing of High-Frequency High-Numerical-Aperture Annular Array Transducer for Improved Depth-of-Field Photoacoustic Microscopy. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2019 Oct 14]. Available from: https://era.library.ualberta.ca/files/wh246t10x.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

Lu,huihong. Design, Fabrication, and Testing of High-Frequency High-Numerical-Aperture Annular Array Transducer for Improved Depth-of-Field Photoacoustic Microscopy. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/wh246t10x

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Pontifícia Universidade Católica de São Paulo

14. Leila Quadrado Lopes. Estudo dos limiares auditivos em altas freqüências em adultos.

Degree: 2005, Pontifícia Universidade Católica de São Paulo

URL: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5376

►

O presente estudo teve por objetivo aplicar a audiometria de altas freqüências (9000 a 20000 Hz) visando verificar se lado da orelha faixa etária e… (more)

▼

O presente estudo teve por objetivo aplicar a audiometria de altas freqüências (9000 a 20000 Hz) visando verificar se lado da orelha faixa etária e sexo são fonte de variabilidade Método Foram selecionados 65 indivíduos (130 orelhas) 22 do sexo masculino e 43 do sexo feminino com idades entre os 20 e 60 anos sem passado otológico, com curvas timpanométricas e limiares de audibilidade na faixa de frequencia convencional (250 a 8000 Hz) dentro da normalidade e presença de reflexos acústicos Foi utilizado na pesquisa das altas freqüencias o audiometro Grason Stadler - GSI 61 e fones Senheiser HDA -200 que possibilitaram a verificação dos limiares auditivos em dB NA Resultados Após análise estatística os resultados demostraram que não houve diferenças estatisticamente significantes com relação ao lado da orelha testada Houve diferenças estatisticamente significantes com relação à faixa etária, sendo piores os limiares auditivos conforme o aumento da idade bem como houve diferencas estatisticamente significantes com relacao à faixa etária sendo piores os limiares auditivos conforme o aumento da idade bem como houve diferencas estatisticamente significantes nos limiares auditivos dos indivíduos dos sexos feminino e masculino sendo que mulheres apresentaram limiares auditivos piores do que homens somente nas frequencias de 16000 e 18000 Hz Entretanto nas demais freqüencias houve uma tendencia à melhora nos limiares para os sujeitos do sexo feminino Conclusao Apesar deste procedimento ainda não ser utilizado na rotina clínica atraves da avaliação das altas freqüências poderemos obter mais informacoes a respeito do sistema auditivo, aumentando assim a compreensão deste e também possibilitando maiores chances de chegarmos a um prognóstico mais preciso sobre as lesões auditivas

The present study aimed at applying high frequency audiometry in the frequency range from 9.000 to 20.000 Hz in individuals, in order to verify if ear, gender and age are variability sources. Method: There were selected 65 individuals (130 ears), being 22 male and 43 female in the age ranging from 20 to 60 years old, with no otological past, with normal tympanometric curves and hearing thresholds in pure tone conventional audiometry (250 8.000 Hz) and presence of acoustic reflexes. The audiometer used was a Grason Stadler GSI 61 with the Senheiser HAD-200 earphones, which allowed dB hearing threshold level. Results: there were no statistically significant differences between tested ears; there were statistically significant differences between age range, being worse the hearing thresholds with the increasing age, as well as there were statistically significant differences between hearing thresholds of female and male individuals, in which women has presented worse hearing thresholds only in 16.000 and 18.000 Hz. Nevertheless, in the other frequencies, there was a tendency of improving the hearing thresholds for female individuals. Conclusion: Despite of this procedure has not being used in the clinical routine, by evaluating the high frequencies…

Advisors/Committee Members: Ieda Chaves Pacheco Russo.

Subjects/Keywords: FONOAUDIOLOGIA; Altas freqüências; Audiometria; Audição; High frequency

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APA (6^th Edition):

Lopes, L. Q. (2005). Estudo dos limiares auditivos em altas freqüências em adultos. (Thesis). Pontifícia Universidade Católica de São Paulo. Retrieved from http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5376

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):

Lopes, Leila Quadrado. “Estudo dos limiares auditivos em altas freqüências em adultos.” 2005. Thesis, Pontifícia Universidade Católica de São Paulo. Accessed October 14, 2019. http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5376.

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

MLA Handbook (7^th Edition):

Lopes, Leila Quadrado. “Estudo dos limiares auditivos em altas freqüências em adultos.” 2005. Web. 14 Oct 2019.

Vancouver:

Lopes LQ. Estudo dos limiares auditivos em altas freqüências em adultos. [Internet] [Thesis]. Pontifícia Universidade Católica de São Paulo; 2005. [cited 2019 Oct 14]. Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5376.

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

Council of Science Editors:

Lopes LQ. Estudo dos limiares auditivos em altas freqüências em adultos. [Thesis]. Pontifícia Universidade Católica de São Paulo; 2005. Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5376

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

NSYSU

15. Sie, Wun-Ge. Preparation, Study and Application of Electro-Optical Properties of Functional Flexible Substrate Materials.

Degree: Master, Electro-Optical Engineering, 2009, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0720109-191858

► In this research, we used monomer 4,4ââââ-Difluore-3,3ââââ- bis(trifluoromethyl)-2ââ,3ââ,5ââ,6ââ-triphenyl and 4,4'-(9-Fluorenylidene) diphenol to fabricate the novel poly(arylene ether)s by the nucleophilic replacement reaction. We call this… (more)

▼ In this research, we used monomer 4,4ââââ-Difluore-3,3ââââ- bis(trifluoromethyl)-2ââ,3ââ,5ââ,6ââ-triphenyl and 4,4'-(9-Fluorenylidene) diphenol to fabricate the novel poly(arylene ether)s by the nucleophilic replacement reaction. We call this polymers P-44, and we use Mass and GPC to measure its molecular weightï¼The molecular structures were investigated and confirmed by NMR and FT-IR. This polymer has high weightaverage molecular weight (Mw) about 5.67Ã104 g/mol. We can realize from the measurement of thermal analysis that its thermal degradation temperature (Td) is 543Â°C, and its glass transition temperature (Tg) is 331Â°C. It shows this polymer: P-44 possesses great thermal stability. Besides, P-44 has not apparent crystallizing point (Tc) so we can adjust that P-44 crystalize hardly. We can know from above that P-44 can not only has good heat tolerance but also has high thermal stability so it can endure futher high tempaerature in the process of fabrication. After interpreting P-44 possesses these well properties, we want to know the properties that P-44 apply to the devices as flexible substrate. So, we fabricate P-44 to be film, and we measure the photoelectrical properties of P-44 film. From this we can observer if P-44 can match the necessary condition that it apply to monitor or high frequency substrate. In the aspect of photophysical properties, we take the 0.3mm P-44 film to measure its photophysical properties. We obtained absorption wavelength that is 245nm and 345nm, and its excitation wavelength is362nmå365nm. Its main area of absorption and excitation is in the region of UV. Furthermore, the transmission spectra of P-44 film showed that visible light transparency were up to 80%. And the refractive index(n) of P-44 film is between 1.37~1.4. In the aspect of thermal mechanical properties, we can know thermal expansion coefficient (CTE) of P-44 film is 19ppm/â, and we can also obtain the heat deflection temperature (HDT) of P-44 film is 316â. It reveals P-44 possesses low thermal expansion coefficient (CTE) and high heat deflection temperature (HDT). In the aspect of surface, we find P-44 film has low polarity whose main component is van der waals and it has good hydrophobicity.Its contact angle with DI-water is 114.5Â° which greater than 90Â° that proves P-44 film has well hydrophobicity. In the aspect of dielectrical properties, we found that its dielectric constant is between 2.51~2.53 under the condition of1M Hz, and its dielectric loss is between 0.0068~0.0071. It shows P-44 film possesses low dielectric constant that let the effect of parasitic capacitances loweredï¼and low dielectric loss let the loss of signal reduced. We can plate ITO onto P-44 film successfully, and it could be a flexible transparent conductive film. By the all of the above results, we can realize P-44 film possesses well thermal stabilitiesãhigh transparency in the region of visible lightãgood hydrophobicityãlow thermal expansion coefficient (CTE)ãlow dielectric constant and low dielectric loss. With these great materialIX… Advisors/Committee Members: Hsin-Lung Chen (chair), Wen-Yao Huang (committee member), Mei-Ying Chang (chair), Yu-Kai Han (chair), Ping-Tsung Huang (chair).

Subjects/Keywords: Polymer; Flexible substrate; High frequency substrate

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APA (6^th Edition):

Sie, W. (2009). Preparation, Study and Application of Electro-Optical Properties of Functional Flexible Substrate Materials. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0720109-191858

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):

Sie, Wun-Ge. “Preparation, Study and Application of Electro-Optical Properties of Functional Flexible Substrate Materials.” 2009. Thesis, NSYSU. Accessed October 14, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0720109-191858.

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

MLA Handbook (7^th Edition):

Sie, Wun-Ge. “Preparation, Study and Application of Electro-Optical Properties of Functional Flexible Substrate Materials.” 2009. Web. 14 Oct 2019.

Vancouver:

Sie W. Preparation, Study and Application of Electro-Optical Properties of Functional Flexible Substrate Materials. [Internet] [Thesis]. NSYSU; 2009. [cited 2019 Oct 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0720109-191858.

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

Council of Science Editors:

Sie W. Preparation, Study and Application of Electro-Optical Properties of Functional Flexible Substrate Materials. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0720109-191858

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

NSYSU

16. Wu, Chao-Ching. High Frequency Parameter Estimation of PMSM and Its Applications.

Degree: Master, Electrical Engineering, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-132726

► This thesis utilizes the high-frequency current injection method and the PI-MRI control topology to estimate the electrical parameters of the permanent magnetic synchronous motor (PMSM).… (more)

Subjects/Keywords: High-frequency current; motor parameter estimation; sensorless

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APA (6^th Edition):

Wu, C. (2015). High Frequency Parameter Estimation of PMSM and Its Applications. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-132726

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):

Wu, Chao-Ching. “High Frequency Parameter Estimation of PMSM and Its Applications.” 2015. Thesis, NSYSU. Accessed October 14, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-132726.

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

MLA Handbook (7^th Edition):

Wu, Chao-Ching. “High Frequency Parameter Estimation of PMSM and Its Applications.” 2015. Web. 14 Oct 2019.

Vancouver:

Wu C. High Frequency Parameter Estimation of PMSM and Its Applications. [Internet] [Thesis]. NSYSU; 2015. [cited 2019 Oct 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-132726.

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

Council of Science Editors:

Wu C. High Frequency Parameter Estimation of PMSM and Its Applications. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-132726

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

University of Western Australia

17. Musk, Gabrielle Christine. Optimisation of high-frequency jet ventilation for the management of respiratory distress syndrome in preterm babies using a preterm lamb model.

Degree: PhD, 2011, University of Western Australia

URL: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=33730&local_base=GEN01-INS01

►

High‐frequency jet ventilation (HFJV) is a lung protective ventilation strategy used for the prevention and treatment of ventilator induced lung injury in preterm infants. Despite… (more)

▼

High‐frequency jet ventilation (HFJV) is a lung protective ventilation strategy used for the prevention and treatment of ventilator induced lung injury in preterm infants. Despite its widespread use in neonatal intensive care units there is little data to support the patient management algorithms that are currently utilised. The strategies for alveolar recruitment during HFJV rely upon incrementing positive end‐expiratory pressure (PEEP) and delivering occasional conventional mechanical ventilator (CMV) breaths, but the impact of these recruitment manoeuvres on pulmonary blood flow, oxygenation, ventilation and lung injury is largely unknown. This thesis investigates the parameters that must be selected during HFJV and their impact upon pulmonary blood flow, physiological changes during ventilation and post mortem lung injury in a preterm lamb model. The first study examined the effect of incrementing PEEP during HFJV and found that alveolar recruitment was achieved by incrementing PEEP up to 12 cmH2O without detrimental effects on physiological parameters. The following 3 studies examined the delivery of CMV breaths during HFJV to compare the effect of 2 different CMV breath inspiratory times, peak inspiratory pressures and frequencies. A shorter inspiratory time CMV breath, a CMV breath delivered to a peak inspiratory pressure (PIP) above the HFJV breaths and CMV breaths delivered less frequently provided the most physiological benefit with the least evidence of harm while adequately ventilating and oxygenating the preterm lambs.

The final study compared what we determined to be optimal HFJV strategy (based upon the results of the preceding studies) with optimal high‐frequency oscillatory ventilation and an open lung gentle CMV strategy. In our preterm lamb model of respiratory distress syndrome we demonstrated little difference in physiological benefit and adverse effects between these 3 lung protective ventilation strategies. The results of these studies contribute to the sparse data on HFJV and have provided fundamental information that will enable a more evidence based approach to clinical decision making in the neonatal intensive care unit. Future work in this area should focus on the target population and incorporate randomised controlled trials comparing HFJV to other ventilatory strategies.

High‐frequency jet ventilation (HFJV) is a lung protective ventilation strategy used for the prevention and treatment of ventilator induced lung injury in preterm infants. Despite its widespread use in neonatal intensive care units there is little data to support the patient management algorithms that are currently utilised. The strategies for alveolar recruitment during HFJV rely upon incrementing positive end‐expiratory pressure (PEEP) and delivering occasional conventional mechanical ventilator (CMV) breaths, but the impact of these recruitment manoeuvres on pulmonary blood flow, oxygenation, ventilation and lung injury is largely unknown. This thesis investigates the parameters that must be selected during…

Subjects/Keywords: High-frequency jet ventilation; Respiratory distress syndrome

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APA (6^th Edition):

Musk, G. C. (2011). Optimisation of high-frequency jet ventilation for the management of respiratory distress syndrome in preterm babies using a preterm lamb model. (Doctoral Dissertation). University of Western Australia. Retrieved from http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=33730&local_base=GEN01-INS01

Chicago Manual of Style (16^th Edition):

Musk, Gabrielle Christine. “Optimisation of high-frequency jet ventilation for the management of respiratory distress syndrome in preterm babies using a preterm lamb model.” 2011. Doctoral Dissertation, University of Western Australia. Accessed October 14, 2019. http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=33730&local_base=GEN01-INS01.

MLA Handbook (7^th Edition):

Musk, Gabrielle Christine. “Optimisation of high-frequency jet ventilation for the management of respiratory distress syndrome in preterm babies using a preterm lamb model.” 2011. Web. 14 Oct 2019.

Vancouver:

Musk GC. Optimisation of high-frequency jet ventilation for the management of respiratory distress syndrome in preterm babies using a preterm lamb model. [Internet] [Doctoral dissertation]. University of Western Australia; 2011. [cited 2019 Oct 14]. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=33730&local_base=GEN01-INS01.

Council of Science Editors:

Musk GC. Optimisation of high-frequency jet ventilation for the management of respiratory distress syndrome in preterm babies using a preterm lamb model. [Doctoral Dissertation]. University of Western Australia; 2011. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=33730&local_base=GEN01-INS01

University of Hawaii – Manoa

18. Cass, Jacob. High frequency radio observations of tides and currents south of O'ahu.

Degree: 2016, University of Hawaii – Manoa

URL: http://hdl.handle.net/10125/101652

►

M.S. University of Hawaii at Manoa 2010.

A year of radial current data from a high frequency radio current meter (HFR) on Oahu's south shore… (more)

Subjects/Keywords: high frequency radio current meter; oceanography

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APA (6^th Edition):

Cass, J. (2016). High frequency radio observations of tides and currents south of O'ahu. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/101652

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):

Cass, Jacob. “High frequency radio observations of tides and currents south of O'ahu.” 2016. Thesis, University of Hawaii – Manoa. Accessed October 14, 2019. http://hdl.handle.net/10125/101652.

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

MLA Handbook (7^th Edition):

Cass, Jacob. “High frequency radio observations of tides and currents south of O'ahu.” 2016. Web. 14 Oct 2019.

Vancouver:

Cass J. High frequency radio observations of tides and currents south of O'ahu. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10125/101652.

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

Council of Science Editors:

Cass J. High frequency radio observations of tides and currents south of O'ahu. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/101652

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

University of California – Irvine

19. Molainezhad, Fatemehe. Analysis and Design of High-Speed CMOS Frequency Dividers.

Degree: Electrical and Computer Engineering, 2015, University of California – Irvine

URL: http://www.escholarship.org/uc/item/9q86n8b2

► A frequency divider is one of the most fundamental and challenging blocks used in high-speed communication systems. Three high-speed dividers with different topologies, LC-tank frequency… (more)

Subjects/Keywords: Electrical engineering; CMOS; Frequency Dividers; High-Speed

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APA (6^th Edition):

Molainezhad, F. (2015). Analysis and Design of High-Speed CMOS Frequency Dividers. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/9q86n8b2

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):

Molainezhad, Fatemehe. “Analysis and Design of High-Speed CMOS Frequency Dividers.” 2015. Thesis, University of California – Irvine. Accessed October 14, 2019. http://www.escholarship.org/uc/item/9q86n8b2.

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

MLA Handbook (7^th Edition):

Molainezhad, Fatemehe. “Analysis and Design of High-Speed CMOS Frequency Dividers.” 2015. Web. 14 Oct 2019.

Vancouver:

Molainezhad F. Analysis and Design of High-Speed CMOS Frequency Dividers. [Internet] [Thesis]. University of California – Irvine; 2015. [cited 2019 Oct 14]. Available from: http://www.escholarship.org/uc/item/9q86n8b2.

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

Council of Science Editors:

Molainezhad F. Analysis and Design of High-Speed CMOS Frequency Dividers. [Thesis]. University of California – Irvine; 2015. Available from: http://www.escholarship.org/uc/item/9q86n8b2

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

University of Southern California

20. Yang, Wei. Theory and applications of ultrasonic soft materials and surface analyzer (USMASA).

Degree: PhD, Chemical Engineering, 2009, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/563474/rec/7422

► High-frequency linear viscoelastic properties of soft materials are essential for material designing and engineering applications. Traditionally, the high-frequency properties are estimated through the time-temperature superposition… (more)

▼ High-frequency linear viscoelastic properties of soft materials are essential for material designing and engineering applications. Traditionally, the high-frequency properties are estimated through the time-temperature superposition (WLF equation) of low-frequency data, which are questionable because the existence of multi-phase in elastomer compounds. Until now, no reliable data at high frequencies over MHz are available.; Ultrasonic measurement techniques are most cost-effective for measuring high-frequency properties. In order to fully characterize high-frequency mechanical properties of materials, both ultrasonic longitudinal and shear properties are necessary. Ultrasonic pulse echo method can measure longitudinal properties precisely, while shear properties can only be determined by ultrasonic impedance method due to high shear attenuation of soft materials. However, currently there are still some major difficulties in determination of high-frequency shear properties of soft materials using this technique.; One of the challenges for ultrasonic impedance technique is the requirement of high-precision ultrasonic data that are not feasible even a decade ago and currently are still limited to the sampling precision of A/D converter. Another more important factor is that the adhesion between the specimens and measurement device has never been perfect and repeatable, which is influenced by applied load, location, composition (carbon black loadings, etc.), and processing conditions, etc. However, at present, studies of high-frequency properties using ultrasonic impedance technique are almost based on the assumption of perfect contact. A new evaluation approach considering the effects of adhesion needs to be developed.; In this dissertation, a device of ultrasonic soft material and surface analyzer (USMASA) is established based on ultrasonic impedance technique. The device can determine both high frequency longitudinal and shear properties by one measurement. The reliability of USMASA is demonstrated through the characterization of water and sillyputty® that have almost perfect contact with the device.; USMASA is a valuable tool of monitoring adhesion dynamics. The adhesions between filled elastomers and fused silica plate, including the effects of pressure, specimen surface treatments with solvents, and composition of materials, were studied with USMASA.; Furthermore, a new evaluation scheme including adhesion effects is presented. The high-frequency shear properties of carbon black filled rubbers were characterized by USMASA. The effects of filler loading level, filler type, filler dispersion, base polymer, and temperature on high-frequency shear properties were discussed. The effects of different compound preparation techniques could be evaluated effectively by USMASA. Advisors/Committee Members: Chang, Wenji Victor (Committee Chair), Shing, Katherine S. (Committee Member), Hogen-Esch, Thieo E. (Committee Member).

Subjects/Keywords: elastomer; high frequency; rheology; shear properties; ultrasonic

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APA (6^th Edition):

Yang, W. (2009). Theory and applications of ultrasonic soft materials and surface analyzer (USMASA). (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/563474/rec/7422

Chicago Manual of Style (16^th Edition):

Yang, Wei. “Theory and applications of ultrasonic soft materials and surface analyzer (USMASA).” 2009. Doctoral Dissertation, University of Southern California. Accessed October 14, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/563474/rec/7422.

MLA Handbook (7^th Edition):

Yang, Wei. “Theory and applications of ultrasonic soft materials and surface analyzer (USMASA).” 2009. Web. 14 Oct 2019.

Vancouver:

Yang W. Theory and applications of ultrasonic soft materials and surface analyzer (USMASA). [Internet] [Doctoral dissertation]. University of Southern California; 2009. [cited 2019 Oct 14]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/563474/rec/7422.

Council of Science Editors:

Yang W. Theory and applications of ultrasonic soft materials and surface analyzer (USMASA). [Doctoral Dissertation]. University of Southern California; 2009. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/563474/rec/7422

University of Southern California

21. Park, Jinhyoung. High frequency chirp coded excitation ultrasound imaging system.

Degree: PhD, Biomedical Engineering, 2011, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/664082/rec/3164

► An increase of imaging frequency enhances the performance in spatial resolution of an ultrasound scanner while sacrificing echo signal to noise ratio (eSNR) because of… (more)

▼ An increase of imaging frequency enhances the performance in spatial resolution of an ultrasound scanner while sacrificing echo signal to noise ratio (eSNR) because of a rise in the amount of attenuation. As solutions to raise the eSNR level while maintaining the enhanced spatial resolution, both fundamental and harmonic coded excitation imaging methods have been proposed. For this purpose, ultrasound bio-microscopes (UBM) capable of chirp coded excitations were implemented on both a linear and a sector mechanical scanning system. A custom-designed broadband (5 MHz – 140 MHz) linear power amplifier was designed as a part of a low noise arbitrary pulse generator to replace a commercial bench-top power amplifier in the linear UBM. The modified imaging system exhibited a better eSNR of 7 dB than the system with a commercial power amplifier while maintaining the spatial resolution in a wire target measurement. In-vivo imaging was carried on pig eye and zebrafish embryo using a 40 MHz and a 100 MHz single element transducer respectively. For high frame rate coded excitation imaging, a standalone frontend system for a sector UBM was implemented. The custom-designed system consisting of a transmitter, a receiver, a motor controller and a motor position interpreter achieved an eSNR of 66 dB utilizing chirp coded excitation for wire target imaging. Moreover, contrast to noise ratio (CNR) was improved from 2.92 to 3.18 with coded excitation. This modified scanner allowed contraction of cardiac chambers of both zebrafish and mouse hearts to be clearly visualized. As an effort to enhance the spatial resolution, pulse inversion chirp coded tissue harmonic imaging (PI-CTHI) was programmed into the custom-designed frontend system. In a wire target study using a 40 MHz single element transducer, lateral resolution was found to be 110 μm, which was narrower than fundamental imaging at153 μm. CNR was found to improve by 34 % when chirp coded excitation was applied to harmonic imaging. This imaging mode was shown to better delineate the clot formation in adult zebrafish heart imaging when the heart was amputated and allowed to regenerate. Advisors/Committee Members: Yen, Jesse T.Hsiai, Tzung K.Kuo, C.-C. JayShung, K. Kirk (Committee Chair).

Subjects/Keywords: high frequency ultrasound imaging; chirp coded excitation

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APA (6^th Edition):

Park, J. (2011). High frequency chirp coded excitation ultrasound imaging system. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/664082/rec/3164

Chicago Manual of Style (16^th Edition):

Park, Jinhyoung. “High frequency chirp coded excitation ultrasound imaging system.” 2011. Doctoral Dissertation, University of Southern California. Accessed October 14, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/664082/rec/3164.

MLA Handbook (7^th Edition):

Park, Jinhyoung. “High frequency chirp coded excitation ultrasound imaging system.” 2011. Web. 14 Oct 2019.

Vancouver:

Park J. High frequency chirp coded excitation ultrasound imaging system. [Internet] [Doctoral dissertation]. University of Southern California; 2011. [cited 2019 Oct 14]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/664082/rec/3164.

Council of Science Editors:

Park J. High frequency chirp coded excitation ultrasound imaging system. [Doctoral Dissertation]. University of Southern California; 2011. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/664082/rec/3164

University of Illinois – Chicago

22. Su, Jian. An Empirical Study of Intra-day Stock Return Volatility.

Degree: 2012, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9104

► It is well known that microstructure noise could have substantial impact on volatility estimation of high frequency asset returns. The Two Scale Realized Volatility (TSRV)… (more)

Subjects/Keywords: realized volatility; high frequency; microstructure noise

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APA (6^th Edition):

Su, J. (2012). An Empirical Study of Intra-day Stock Return Volatility. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9104

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):

Su, Jian. “An Empirical Study of Intra-day Stock Return Volatility.” 2012. Thesis, University of Illinois – Chicago. Accessed October 14, 2019. http://hdl.handle.net/10027/9104.

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

MLA Handbook (7^th Edition):

Su, Jian. “An Empirical Study of Intra-day Stock Return Volatility.” 2012. Web. 14 Oct 2019.

Vancouver:

Su J. An Empirical Study of Intra-day Stock Return Volatility. [Internet] [Thesis]. University of Illinois – Chicago; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10027/9104.

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

Council of Science Editors:

Su J. An Empirical Study of Intra-day Stock Return Volatility. [Thesis]. University of Illinois – Chicago; 2012. Available from: http://hdl.handle.net/10027/9104

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

Kansas State University

23. Zhang, Zhihan. Selected results from clustering and analyzing stock market trade data.

Degree: MS, Department of Statistics, 2018, Kansas State University

URL: http://hdl.handle.net/2097/39297

► The amount of data generated from stock market trading is massive. For example, roughly 10 million trades are performed each day on the NASDAQ stock… (more)

Subjects/Keywords: Clustering; Stock market dataset; High-frequency trades

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APA (6^th Edition):

Zhang, Z. (2018). Selected results from clustering and analyzing stock market trade data. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/39297

Chicago Manual of Style (16^th Edition):

Zhang, Zhihan. “Selected results from clustering and analyzing stock market trade data.” 2018. Masters Thesis, Kansas State University. Accessed October 14, 2019. http://hdl.handle.net/2097/39297.

MLA Handbook (7^th Edition):

Zhang, Zhihan. “Selected results from clustering and analyzing stock market trade data.” 2018. Web. 14 Oct 2019.

Vancouver:

Zhang Z. Selected results from clustering and analyzing stock market trade data. [Internet] [Masters thesis]. Kansas State University; 2018. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/2097/39297.

Council of Science Editors:

Zhang Z. Selected results from clustering and analyzing stock market trade data. [Masters Thesis]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39297

24. Cauwe, Maarten. High-frequency characterization of embedded components in printed circuit boards.

Degree: 2010, Ghent University

URL: http://hdl.handle.net/1854/LU-1041792

► The embedding of electronic components is a three-dimensional packaging technology, where chips are placed inside of the printed circuit board instead of on top. The… (more)

Subjects/Keywords: Technology and Engineering; Chip embedding; High-Frequency

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APA (6^th Edition):

Cauwe, M. (2010). High-frequency characterization of embedded components in printed circuit boards. (Thesis). Ghent University. Retrieved from http://hdl.handle.net/1854/LU-1041792

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):

Cauwe, Maarten. “High-frequency characterization of embedded components in printed circuit boards.” 2010. Thesis, Ghent University. Accessed October 14, 2019. http://hdl.handle.net/1854/LU-1041792.

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

MLA Handbook (7^th Edition):

Cauwe, Maarten. “High-frequency characterization of embedded components in printed circuit boards.” 2010. Web. 14 Oct 2019.

Vancouver:

Cauwe M. High-frequency characterization of embedded components in printed circuit boards. [Internet] [Thesis]. Ghent University; 2010. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1854/LU-1041792.

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

Council of Science Editors:

Cauwe M. High-frequency characterization of embedded components in printed circuit boards. [Thesis]. Ghent University; 2010. Available from: http://hdl.handle.net/1854/LU-1041792

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

University of Waterloo

25. Wisebourt, Shaul Sergey. Hierarchical Hidden Markov Model of High-Frequency Market Regimes using Trade Price and Limit Order Book Information.

Degree: 2011, University of Waterloo

URL: http://hdl.handle.net/10012/5921

► Over the last fifty years financial markets have seen an enormous expansion and development both in size and variety. An industry that was once small… (more)

▼ Over the last fifty years financial markets have seen an enormous expansion and development both in size and variety. An industry that was once small and secluded has transformed into an essential part of today’s economy. Such changes should in part be attributed to substantial advances in computer technology. The latest allowed for a transition from face-to-face trading on organized exchanges to a distributed system of electronic markets with new mechanisms serving the purposes of efficiency, transparency and liquidity. In majority of cases this new trading system is driven by a double auction market mechanism, in which market participants submit buy and sell orders, aiming to strike a balance between certainty of execution and attractiveness of trade price. Generally, information about outstanding buy and sell orders is made available to market participants in the form of a limit order book. It has been suggested by multiple prior research that limit order books contain information that could be used to derive market sentiment and predict future price movement. In the current study we have presented ideas behind double auction market mechanism and have attempted to model run and reversal market regimes using a simple and intuitive Hierarchical Hidden Markov Model. We have proposed a statistical measure of the limit order book imbalance and have used it to build observation (feature) vector for our model. We have built Limit Order Book analyzer – the software tool that has become essential for data cleaning and validation, as well as extraction of feature vector components from the data. We have used the model on high frequency tick-by-tick trade and limit order book data from the Toronto Stock Exchange. We have performed the analysis of computational results; for this purpose we have used a sample of annualized returns of stocks which comprised the TSX60 index at the time of data collection; we have performed the comparative analysis of our results with a simple daily buy & hold trading strategy as well as results of the trade price and volume model presented in the prior research.

Subjects/Keywords: Markov; Model; High; Frequency; Market; Regimes

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APA (6^th Edition):

Wisebourt, S. S. (2011). Hierarchical Hidden Markov Model of High-Frequency Market Regimes using Trade Price and Limit Order Book Information. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5921

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):

Wisebourt, Shaul Sergey. “Hierarchical Hidden Markov Model of High-Frequency Market Regimes using Trade Price and Limit Order Book Information.” 2011. Thesis, University of Waterloo. Accessed October 14, 2019. http://hdl.handle.net/10012/5921.

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

MLA Handbook (7^th Edition):

Wisebourt, Shaul Sergey. “Hierarchical Hidden Markov Model of High-Frequency Market Regimes using Trade Price and Limit Order Book Information.” 2011. Web. 14 Oct 2019.

Vancouver:

Wisebourt SS. Hierarchical Hidden Markov Model of High-Frequency Market Regimes using Trade Price and Limit Order Book Information. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/10012/5921.

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

Council of Science Editors:

Wisebourt SS. Hierarchical Hidden Markov Model of High-Frequency Market Regimes using Trade Price and Limit Order Book Information. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/5921

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

University of Illinois – Urbana-Champaign

26. Arikan, Toros. Minimum-delay HF communications.

Degree: MS, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/97507

► HF radio communications offer latency advantages over fiber-optics and are more economical than satellite links in long-distance communication applications. As a result, there is renewed… (more)

Subjects/Keywords: Channel equalization; High frequency (HF) communications

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APA (6^th Edition):

Arikan, T. (2017). Minimum-delay HF communications. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/97507

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):

Arikan, Toros. “Minimum-delay HF communications.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed October 14, 2019. http://hdl.handle.net/2142/97507.

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

MLA Handbook (7^th Edition):

Arikan, Toros. “Minimum-delay HF communications.” 2017. Web. 14 Oct 2019.

Vancouver:

Arikan T. Minimum-delay HF communications. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/2142/97507.

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

Council of Science Editors:

Arikan T. Minimum-delay HF communications. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/97507

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

University of Southern California

27. Zheng, Fan. High frequency ultrasonic phased array system and its applications.

Degree: PhD, Biomedical Engineering, 2012, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/109547/rec/3165

► While similar to a linear-switched array in structure, an ultrasound linear phased array (simply called phased array) is quite different in operation. It is capable… (more)

▼ While similar to a linear-switched array in structure, an ultrasound linear phased array (simply called phased array) is quite different in operation. It is capable of beam steering to form fan-shaped sector images without inducing grating lobes. Moreover, the relative smaller array footprint is useful where only very limited contact surface is permitted. High frequency phased arrays combine the advantages of the phased array and high frequency ultrasound, which offer both small footprint and high spatial resolution. This dissertation reports the design and development of a digital ultrasonic imaging platform with raw RF data acquisition capability, which can be paired with a prototype 64-element 26 MHz phased array transducer. A wire phantom image showed that -6 dB lateral and axial resolutions were 209 and 104 μm, respectively, which were in good agreement with the Field II simulation. Anechoic cyst tissue-mimicking phantom images demonstrated its capability to detect cysts of 300 μm in diameter. An image of a rabbit eyeball in vitro was also acquired. This imaging platform is designed for the purpose of testing high frequency phased arrays under development as well as facilitating the development in novel array signal processing algorithms. ❧ Without additional change in the system hardware, the current high frequency array system can be also applied in the industrial non-destructive testing (NDT) applications. A motorized XY stage allows the array system to acquire C-mode scan as well as normal B-mode scan with bigger scanning area. Electronic scanning in array system could dramatically reduce the total scanning time compare to single element system. An aluminum sample and a silicon carbide sample were examined to test the system in non-destructive testing. ❧ Besides the applications in biomedical imaging and non-destructive testing, the high frequency ultrasonic phased array and system are shown to be capable of trapping and translating microparticles precisely and efficiently, made possible due to the fact that the acoustic beam produced by a phased array can be both focused and steered. Acoustic manipulation of microparticles by a phased array is advantageous over a single element transducer since there is no mechanical movement required for the array. Experimental results show that 45 μm diameter polystyrene microspheres can be easily and accurately trapped and moved to desired positions by a 64-element 26 MHz phased array. Advisors/Committee Members: Shung, Kirk Koping (Committee Chair), Yen, Jesse T. (Committee Member), Kim, Eun Sok (Committee Member), Zhou, Qifa (Committee Member).

Subjects/Keywords: high frequency; ultrasound; phased array; imaging system

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

APA (6^th Edition):

Zheng, F. (2012). High frequency ultrasonic phased array system and its applications. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/109547/rec/3165

Chicago Manual of Style (16^th Edition):

Zheng, Fan. “High frequency ultrasonic phased array system and its applications.” 2012. Doctoral Dissertation, University of Southern California. Accessed October 14, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/109547/rec/3165.

MLA Handbook (7^th Edition):

Zheng, Fan. “High frequency ultrasonic phased array system and its applications.” 2012. Web. 14 Oct 2019.

Vancouver:

Zheng F. High frequency ultrasonic phased array system and its applications. [Internet] [Doctoral dissertation]. University of Southern California; 2012. [cited 2019 Oct 14]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/109547/rec/3165.

Council of Science Editors:

Zheng F. High frequency ultrasonic phased array system and its applications. [Doctoral Dissertation]. University of Southern California; 2012. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/109547/rec/3165

Queens University

28. Abnavi, Somayeh. High Frequency Class DE Converter Using a Multilayer Coreless PCB Transformer .

Degree: Electrical and Computer Engineering, Queens University

URL: http://hdl.handle.net/1974/15263

► In modern power electronics equipment, it is desirable to design a low profile, high power density, and fast dynamic response converter. Increases in switching frequency… (more)

▼ In modern power electronics equipment, it is desirable to design a low profile, high power density, and fast dynamic response converter. Increases in switching frequency reduce the size of the passive components such as transformers, inductors, and capacitors which results in compact size and less requirement for the energy storage. In addition, the fast dynamic response can be achieved by operating at high frequency. However, achieving high frequency operation while keeping the efficiency high, requires new advanced devices, higher performance magnetic components, and new circuit topology. These are required to absorb and utilize the parasitic components and also to mitigate the frequency dependent losses including switching loss, gating loss, and magnetic loss. Required performance improvements can be achieved through the use of Radio Frequency (RF) design techniques. To reduce switching losses, resonant converter topologies like resonant RF amplifiers (inverters) combined with a rectifier are the effective solution to maintain high efficiency at high switching frequencies through using the techniques such as device parasitic absorption, Zero Voltage Switching (ZVS), Zero Current Switching (ZCS), and a resonant gating. Gallium Nitride (GaN) device technologies are being broadly used in RF amplifiers due to their lower on- resistance and device capacitances compared with silicon (Si) devices. Therefore, this kind of semiconductor is well suited for high frequency power converters. The major problems involved with high frequency magnetics are skin and proximity effects, increased core and copper losses, unbalanced magnetic flux distribution generating localized hot spots, and reduced coupling coefficient. In order to eliminate the magnetic core losses which play a crucial role at higher operating frequencies, a coreless PCB transformer can be used. Compared to the conventional wire-wound transformer, a planar PCB transformer in which the windings are laid on the Printed Board Circuit (PCB) has a low profile structure, excellent thermal characteristics, and ease of manufacturing. Therefore, the work in this thesis demonstrates the design and analysis of an isolated low profile class DE resonant converter operating at 10 MHz switching frequency with a nominal output of 150 W. The power stage consists of a class DE inverter using GaN devices along with a sinusoidal gate drive circuit on the primary side and a class DE rectifier on the secondary side. For obtaining the stringent height converter, isolation is provided by a 10-layered coreless PCB transformer of 1:20 turn’s ratio. It is designed and optimized using 3D Finite Element Method (FEM) tools and radio frequency (RF) circuit design software. Simulation and experimental results are presented for a 10-layered coreless PCB transformer operating in 10 MHz.

Subjects/Keywords: High Frequency Converter

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

APA (6^th Edition):

Abnavi, S. (n.d.). High Frequency Class DE Converter Using a Multilayer Coreless PCB Transformer . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/15263

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abnavi, Somayeh. “High Frequency Class DE Converter Using a Multilayer Coreless PCB Transformer .” Thesis, Queens University. Accessed October 14, 2019. http://hdl.handle.net/1974/15263.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abnavi, Somayeh. “High Frequency Class DE Converter Using a Multilayer Coreless PCB Transformer .” Web. 14 Oct 2019.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Abnavi S. High Frequency Class DE Converter Using a Multilayer Coreless PCB Transformer . [Internet] [Thesis]. Queens University; [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1974/15263.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Abnavi S. High Frequency Class DE Converter Using a Multilayer Coreless PCB Transformer . [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/15263

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

University of Victoria

29. Duan, Jun. Nowcasting by the BSTS-U-MIDAS Model.

Degree: Department of Economics, 2015, University of Victoria

URL: http://hdl.handle.net/1828/6711

► Using high frequency data for forecasting or nowcasting, we have to deal with three major problems: the mixed frequency problem, the high dimensionality (fat re-… (more)

Subjects/Keywords: forecasting; nowcasting; BSTS-U-MIDAS model; high frequency data; mixed frequency problem; high dimensionality

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

APA (6^th Edition):

Duan, J. (2015). Nowcasting by the BSTS-U-MIDAS Model. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/6711

Chicago Manual of Style (16^th Edition):

Duan, Jun. “Nowcasting by the BSTS-U-MIDAS Model.” 2015. Masters Thesis, University of Victoria. Accessed October 14, 2019. http://hdl.handle.net/1828/6711.

MLA Handbook (7^th Edition):

Duan, Jun. “Nowcasting by the BSTS-U-MIDAS Model.” 2015. Web. 14 Oct 2019.

Vancouver:

Duan J. Nowcasting by the BSTS-U-MIDAS Model. [Internet] [Masters thesis]. University of Victoria; 2015. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1828/6711.

Council of Science Editors:

Duan J. Nowcasting by the BSTS-U-MIDAS Model. [Masters Thesis]. University of Victoria; 2015. Available from: http://hdl.handle.net/1828/6711

Universidade Nova

30. Oliveira, Wellington Ferreira. A aplicação de redes neuronais na deteção da influência do High Frequency Trading na negociação de ações (caso português).

Degree: 2012, Universidade Nova

URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7463

►

Dissertação apresentada como requisito parcial para obtenção do grau de Mestre em Estatística e Gestão da Informação

O aumento da capacidade de processamento dos sistemas… (more)

Subjects/Keywords: High Frequency Trading; High Frequency Trader; Redes neuronais; Self-Organizing Map; Segmentação; Euronext Lisbon

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

APA (6^th Edition):

Oliveira, W. F. (2012). A aplicação de redes neuronais na deteção da influência do High Frequency Trading na negociação de ações (caso português). (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7463

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):

Oliveira, Wellington Ferreira. “A aplicação de redes neuronais na deteção da influência do High Frequency Trading na negociação de ações (caso português).” 2012. Thesis, Universidade Nova. Accessed October 14, 2019. http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7463.

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

MLA Handbook (7^th Edition):

Oliveira, Wellington Ferreira. “A aplicação de redes neuronais na deteção da influência do High Frequency Trading na negociação de ações (caso português).” 2012. Web. 14 Oct 2019.

Vancouver:

Oliveira WF. A aplicação de redes neuronais na deteção da influência do High Frequency Trading na negociação de ações (caso português). [Internet] [Thesis]. Universidade Nova; 2012. [cited 2019 Oct 14]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7463.

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

Council of Science Editors:

Oliveira WF. A aplicação de redes neuronais na deteção da influência do High Frequency Trading na negociação de ações (caso português). [Thesis]. Universidade Nova; 2012. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7463

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

Open Access Theses and Dissertations