subject:(self noise)

University of Waterloo

1. Tam, Nicholas. An Aeroacoustic Study of Airfoil Self-Noise for Wind Turbine Applications.

Degree: 2017, University of Waterloo

► The current study addresses the issue of noise relating to both large and small scale wind turbines. In utility scale applications, larger size rotors in… (more)

▼ The current study addresses the issue of noise relating to both large and small scale wind turbines. In utility scale applications, larger size rotors in new generations of wind turbines bring an increasing challenge to manage noise emissions. A better understanding of wind turbine noise characteristics, behaviour and generation mechanics can facilitate the development of noise reduction strategies. This can greatly aid in their adoption. The issue of noise, however, is not exclusive to large scale wind turbines. Small scale wind turbines, operating in laminar or transitional regimes, has the potential to emit tonal noise which can be more audible and of a greater nuisance. Small scale wind turbines can be installed in higher traffic areas closer to human receptors. As such, the understanding of their noise characteristics, behaviour and generation mechanics is important as well. In Reynolds number regime where small scale wind turbine operates, tonal noise is primarily caused by laminar boundary layer-vortex shedding (LBL-VS) noise generation mechanism. In the controlled environment of a closed circuit wind tunnel, the SD-7037 airfoil profile is examined at Re = 4.0 x 10⁴. Acoustic measurements are collected when the airfoil is under dynamic oscillation and under various static angles of attack. Results found evidence to suggest LBL-VS noise originated from the suction side of the airfoil in this study; suggesting noise reduction efforts should be focused on suction side phenomenon in similar low Reynold number flow (Re < 10⁵). Under dynamic oscillation, airfoil self-noise is studied in condition more representative of outdoor conditions. The tonal noise was found to be reduced compared with static low angles of attack results. The tones were also seen as intermittent; appearing at certain phases of the oscillation cycle. Side peaks were also found at the narrowband acoustic spectra; with the cause linked to the dynamic oscillating frequency. Trailing edge saw-tooth serrations, which have been used on large scale wind turbines, are examined for their noise reduction properties with the SD-7037 airfoil profile. The results were found to be mixed. For larger scale wind turbines, turbulent boundary layer flow more commonly found on the surface of the airfoil, leading to the generation of broadband noise at the trailing edge. The current study examines a 10 m diameter passive controlled wind turbine at the Wind Energy Group outdoor wind turbine test site. The behaviour of the wind turbine noise with respect to on site parameters such as upstream wind speed, upstream wind direction, wind turbine yaw direction, wind turbine blade pitch angle and wind turbine rotor rpm are examined. The feasibility for performing further acoustic experiments at the Wind Energy Group outdoor wind turbine test site is also assessed.

Subjects/Keywords: Wind Turbine Noise; Aeroacoustics; Airfoil Self-Noise; Laminar Boundary Layer-Vortex Shedding Noise; IEC 61400-11; Tonal Noise; Sound

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

APA (6^th Edition):

Tam, N. (2017). An Aeroacoustic Study of Airfoil Self-Noise for Wind Turbine Applications. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11736

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):

Tam, Nicholas. “An Aeroacoustic Study of Airfoil Self-Noise for Wind Turbine Applications.” 2017. Thesis, University of Waterloo. Accessed January 19, 2021. http://hdl.handle.net/10012/11736.

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

MLA Handbook (7^th Edition):

Tam, Nicholas. “An Aeroacoustic Study of Airfoil Self-Noise for Wind Turbine Applications.” 2017. Web. 19 Jan 2021.

Vancouver:

Tam N. An Aeroacoustic Study of Airfoil Self-Noise for Wind Turbine Applications. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10012/11736.

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

Council of Science Editors:

Tam N. An Aeroacoustic Study of Airfoil Self-Noise for Wind Turbine Applications. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/11736

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

University of New South Wales

2. Zajamsek, Branko. Experimental investigation into airfoil self-noise, blade-tower interaction noise and wind farm noise character.

Degree: Mechanical & Manufacturing Engineering, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/57370 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43334/SOURCE02?view=true

► An experimental investigation into airfoil self-noise (trailing edge noise, tip vortex formation noise and bluntness trailing edge noise) and blade-tower interaction (BTI) noise from rotating… (more)

Subjects/Keywords: trailing edge noise; wind farm noise; airfoil self-noise; low-frequency noise; infrasound; blade-tower interaction noise; BTI; blade passage effect noise

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

APA (6^th Edition):

Zajamsek, B. (2017). Experimental investigation into airfoil self-noise, blade-tower interaction noise and wind farm noise character. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/57370 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43334/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Zajamsek, Branko. “Experimental investigation into airfoil self-noise, blade-tower interaction noise and wind farm noise character.” 2017. Doctoral Dissertation, University of New South Wales. Accessed January 19, 2021. http://handle.unsw.edu.au/1959.4/57370 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43334/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Zajamsek, Branko. “Experimental investigation into airfoil self-noise, blade-tower interaction noise and wind farm noise character.” 2017. Web. 19 Jan 2021.

Vancouver:

Zajamsek B. Experimental investigation into airfoil self-noise, blade-tower interaction noise and wind farm noise character. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2021 Jan 19]. Available from: http://handle.unsw.edu.au/1959.4/57370 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43334/SOURCE02?view=true.

Council of Science Editors:

Zajamsek B. Experimental investigation into airfoil self-noise, blade-tower interaction noise and wind farm noise character. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/57370 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43334/SOURCE02?view=true

3. Meyer-Nieberg, Silja. Self-adaptation in evolution strategies.

Degree: 2007, Technische Universität Dortmund

URL: http://hdl.handle.net/2003/25073

► In this thesis, an analysis of self-adaptative evolution strategies (ES) is provided. Evolution strategies are population-based search heuristics usually applied in continuous search spaces which… (more)

Subjects/Keywords: Dynamic systems; Evolution strategies; Noise; Optimization; Self-adaptation; 004

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

APA (6^th Edition):

Meyer-Nieberg, S. (2007). Self-adaptation in evolution strategies. (Thesis). Technische Universität Dortmund. Retrieved from http://hdl.handle.net/2003/25073

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):

Meyer-Nieberg, Silja. “Self-adaptation in evolution strategies.” 2007. Thesis, Technische Universität Dortmund. Accessed January 19, 2021. http://hdl.handle.net/2003/25073.

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

MLA Handbook (7^th Edition):

Meyer-Nieberg, Silja. “Self-adaptation in evolution strategies.” 2007. Web. 19 Jan 2021.

Vancouver:

Meyer-Nieberg S. Self-adaptation in evolution strategies. [Internet] [Thesis]. Technische Universität Dortmund; 2007. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2003/25073.

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

Council of Science Editors:

Meyer-Nieberg S. Self-adaptation in evolution strategies. [Thesis]. Technische Universität Dortmund; 2007. Available from: http://hdl.handle.net/2003/25073

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

University of Waterloo

4. Hosseinzadeh, Alireza. A Model for Self-Phase Modulation Noise in Fiber-link Communication Systems.

Degree: 2020, University of Waterloo

URL: http://hdl.handle.net/10012/15553

► Recent tele-communication hugely relies on ﬁber-optic systems. Linear ﬁber-optic impairments can be modeled with chromatic and polarization-mode dispersion. However, nonlinear impairments such as SPM and… (more)

Subjects/Keywords: modeling; compensation; SPM; self-phase modulation; noise; fiber-link

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

APA (6^th Edition):

Hosseinzadeh, A. (2020). A Model for Self-Phase Modulation Noise in Fiber-link Communication Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15553

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):

Hosseinzadeh, Alireza. “A Model for Self-Phase Modulation Noise in Fiber-link Communication Systems.” 2020. Thesis, University of Waterloo. Accessed January 19, 2021. http://hdl.handle.net/10012/15553.

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

MLA Handbook (7^th Edition):

Hosseinzadeh, Alireza. “A Model for Self-Phase Modulation Noise in Fiber-link Communication Systems.” 2020. Web. 19 Jan 2021.

Vancouver:

Hosseinzadeh A. A Model for Self-Phase Modulation Noise in Fiber-link Communication Systems. [Internet] [Thesis]. University of Waterloo; 2020. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10012/15553.

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

Council of Science Editors:

Hosseinzadeh A. A Model for Self-Phase Modulation Noise in Fiber-link Communication Systems. [Thesis]. University of Waterloo; 2020. Available from: http://hdl.handle.net/10012/15553

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

McMaster University

5. Rahbarfam, Saber. Nonlinear Phase Noise in Dispersion Unmanaged Fiber-Optic Systems.

Degree: MASc, 2018, McMaster University

URL: http://hdl.handle.net/11375/24018

►

Since the introduction of optical fibers in 1960's in communication systems, researchers have encountered many challenges to improve the signal quality at the receiver as… (more)

▼

Since the introduction of optical fibers in 1960's in communication systems, researchers have encountered many challenges to improve the signal quality at the receiver as well as transmitting the signal as distant as possible. The former was achieved by employing coherent receivers, which let us use M-array modulation formats, such as QPSK, or QAM, and polarization of the signal. The later is accomplished by the advent of optical amplifiers. Optical amplifiers enable us to compensate for the loss occurred within the fiber optic line, without the need for optical-electrical signal conversion. These amplifiers add noise to the line which interacts with the nonlinearity in the fiber line. This interaction causes phase change in the propagating signal called nonlinear phase noise, which degrades the system performance. In this study we will derive an analytical expression for the linear and nonlinear phase noise variance in dispersion unmanaged fiber optic systems, using a first-order perturbation theory. We use numerical examples to depict the proposed system performance in terms of nonlinear phase noise variance. We will conclude that the nonlinear phase variance in a dispersion unmanaged system is much lower than the corresponding noise variance in a dispersion managed system. We will use this concept and will introduce more dispersion in the line by adding fiber brag gratings (FBGs) throughout the fiber link. Through numerical simulations, we will illustrate the improvement we get by adding FBG in each span. We will show that employing FBG improves the system performance for systems working at symbol rates 5 GBaud, which we get the best improvement to less than 20 GBaud, and beyond 20 GBaud there will be no improvement. Nowadays, telecommunication systems based on fiber optics are working at symbol rates around 28 GBaud. We will introduce new models to reduce the nonlinear phase, by splitting digital back propagation (DBP) between transmitter and receiver, and using optical phase conjugation (OPC) in the line. We will prove that the new proposed models lower the phase noise variance significantly, for single pulses. We will also illustrate numerical examples to validate the betterment they provide in terms of Q-factor.

Thesis

Master of Applied Science (MASc)

Advisors/Committee Members: Kumar, Shiva, Electrical and Computer Engineering.

Subjects/Keywords: Fiber Optic Communications; Nonlinear Phase Noise; Self-Phase Modulation

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

APA (6^th Edition):

Rahbarfam, S. (2018). Nonlinear Phase Noise in Dispersion Unmanaged Fiber-Optic Systems. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/24018

Chicago Manual of Style (16^th Edition):

Rahbarfam, Saber. “Nonlinear Phase Noise in Dispersion Unmanaged Fiber-Optic Systems.” 2018. Masters Thesis, McMaster University. Accessed January 19, 2021. http://hdl.handle.net/11375/24018.

MLA Handbook (7^th Edition):

Rahbarfam, Saber. “Nonlinear Phase Noise in Dispersion Unmanaged Fiber-Optic Systems.” 2018. Web. 19 Jan 2021.

Vancouver:

Rahbarfam S. Nonlinear Phase Noise in Dispersion Unmanaged Fiber-Optic Systems. [Internet] [Masters thesis]. McMaster University; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11375/24018.

Council of Science Editors:

Rahbarfam S. Nonlinear Phase Noise in Dispersion Unmanaged Fiber-Optic Systems. [Masters Thesis]. McMaster University; 2018. Available from: http://hdl.handle.net/11375/24018

University of Manchester

6. Zhang, Linqing. EXPERIMENTAL STUDIES ON A PLANAR UNIPOLAR NANO-DIODE.

Degree: 2014, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222881

► This research focuses on a solid-state planar unipolar nano-diode, known as a self-switching diode (SSD). The planar architecture of the SSD ensures the parasitic capacitance… (more)

▼ This research focuses on a solid-state planar unipolar nano-diode, known as a self-switching diode (SSD). The planar architecture of the SSD ensures the parasitic capacitance of this device much smaller than that of a vertical diode of comparable size, allowing a high working speed. SSDs have been successfully demonstrated as terahertz detectors operating up to 1.5 THz on a GaAs/AlGaAs two-dimensional electron gas (2DEG) wafer at room temperature and up to 2.5 THz on an InGaAs/InP 2DEG wafer at 150 K. To date, SSDs fabricated using GaAs and InGaAs have been extensively studied. The primary aim of this research is to explore SSDs on other promising materials such as InAs/AlSb because of its high electron mobility and GaN/AlGaN for potential high-power applications. First, InAs/AlSb-based SSDs were explored. The fast forming of native oxide of the AlSb layer presented a major challenge. This was effectively dealt with by the addition of 10% Gallium to the AlSb layer and a further coating of polymethyl methacrylate on the devices immediately after etching. Both DC and RF measurements were subsequently carried out to provide a proof of principle. The SSDs were found to have higher current at room temperature than those produced on GaAs and InGaAs 2DEG wafers. This was, to our knowledge, the first nanoelectronic device that was demonstrated using InAs/AlSb by wet etching. Noise performance of the SSD is crucial when it is used as a microwave or terahertz detector since low-frequency modulation is often used during detection. A noise characterisation setup based on a two-channel cross-correlation principle was developed, which is capable for SSDs with a wide range of impedance values. The noise setup was first used to characterise GaN/AlGaN-based SSDs. The effect of SSD design on the low-frequency noise was investigated. Results indicated that the measured low-frequency noise at various bias currents was dominated by flicker noise and described by Hooge’s formula. The Hooge’s constant was determined. We show that arranging a number of SSDs in parallel into an array effectively reduced the low-frequency noise and resulted in a lower corner frequency. Finally, the effect of filling a high-k dielectric material into the SSD nanotrenches was studied experimentally for the first time. A 100 nm thick, high-k SiNx film was applied using plasma-enhanced chemical vapour deposition. DC, RF and noise measurements were performed. The results demonstrated improved I-V characteristic, higher RF responsitivity and reduced low-frequency noise. Advisors/Committee Members: Song, Aimin.

Subjects/Keywords: nano-diode; self-switching diode; noise; high-k dielectric; heterostructure; terahertz

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

APA (6^th Edition):

Zhang, L. (2014). EXPERIMENTAL STUDIES ON A PLANAR UNIPOLAR NANO-DIODE. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222881

Chicago Manual of Style (16^th Edition):

Zhang, Linqing. “EXPERIMENTAL STUDIES ON A PLANAR UNIPOLAR NANO-DIODE.” 2014. Doctoral Dissertation, University of Manchester. Accessed January 19, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222881.

MLA Handbook (7^th Edition):

Zhang, Linqing. “EXPERIMENTAL STUDIES ON A PLANAR UNIPOLAR NANO-DIODE.” 2014. Web. 19 Jan 2021.

Vancouver:

Zhang L. EXPERIMENTAL STUDIES ON A PLANAR UNIPOLAR NANO-DIODE. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Jan 19]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222881.

Council of Science Editors:

Zhang L. EXPERIMENTAL STUDIES ON A PLANAR UNIPOLAR NANO-DIODE. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222881

University of Adelaide

7. Rugari, Joseph. [EMBARGOED] Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques.

Degree: 2018, University of Adelaide

URL: http://hdl.handle.net/2440/120345

► Being the driest continent in the world, there is a significant reliance on groundwater resources within many communities and industries throughout Australia. Particularly in regional… (more)

▼ Being the driest continent in the world, there is a significant reliance on groundwater resources within many communities and industries throughout Australia. Particularly in regional areas with low rainfall and surface runoff resources, the underlying groundwater availability plays a pivotal role in population capacity and economic prosperity. Whilst the importance of groundwater resources is indisputable, many aspects of its real world homeostatic processes, in both macro and micro scales, remain difficult to decipher and explain. Within Australia’s fractured rock aquifer systems, attributed with storage of the largest volume of groundwater resources nationally, there is still only fragmented understandings of several of their principal components and capacities. This is inclusive even of key aquifer characteristics, such as total volume estimations, regeneration sources, and their flow or transportation methods. Improved modeling capabilities and techniques based on prominent and robust hydrogeological principals are continually emerging from advancing technologies, new data sources and forward thinking. However, within the field data retrieval facet of hydrological research a seemingly slower evolution is taking place. A vast quantity of aquifer information is still derived directly from intrusive observation wells. Although the plethora of information these wells can yield in modelling is invaluable, there are some profound limitations that must still be addressed. Wells are costly to establish due to drilling expenses, can only provide single point information, and can also be disruptive to the homeostasis of the system. The self-potential method is an electro-kinetic geophysical method that has recently been re-identified as an immensely promising groundwater technique. It is a fast, passive, inexpensive surface technique which requires no drilling. Uniquely and most importantly however, it is the only geophysical method that is directly sensitive to not only the presence of groundwater, but also the physical flow of groundwater due to its generation of a measurable electrical signal. Previously regarded as a predominately qualitative geophysical tool, contributing factors including advancements in low-cost instrumentation and processing capabilities have meant self-potential surveys can now provide spatially significant quantitative data for a range of groundwater modelling inputs such as permeability. The method has been recurrently reviewed since its early conception in international geophysical literature through to modern times. However, only a small quantity of this peer reviewed research has been conducted within Australia. A lesser extent of published literature therefore deals in particularly with addressing the challenges of both our harsh climate, and surface and geological conditions. With our own unique geological and hydrogeological settings, current and future challenges regarding securement of groundwater resources, and increasingly common practice of industrial geotechnical processes such as… Advisors/Committee Members: Heinson, Graham (advisor), Hasterok, Derrick (advisor), School of Physical Sciences (school).

Subjects/Keywords: Groundwater; electrokinetics; self-potential; fractured rock aquifer; ANN; environmental noise filtration

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

APA (6^th Edition):

Rugari, J. (2018). [EMBARGOED] Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/120345

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):

Rugari, Joseph. “[EMBARGOED] Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques.” 2018. Thesis, University of Adelaide. Accessed January 19, 2021. http://hdl.handle.net/2440/120345.

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

MLA Handbook (7^th Edition):

Rugari, Joseph. “[EMBARGOED] Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques.” 2018. Web. 19 Jan 2021.

Vancouver:

Rugari J. [EMBARGOED] Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques. [Internet] [Thesis]. University of Adelaide; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2440/120345.

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

Council of Science Editors:

Rugari J. [EMBARGOED] Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques. [Thesis]. University of Adelaide; 2018. Available from: http://hdl.handle.net/2440/120345

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

University of Manchester

8. Zhang, Linqing. Experimental studies on a planar unipolar nano-diode.

Degree: PhD, 2014, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-a-planar-unipolar-nanodiode(1b08f0de-de92-4369-90d0-c8b3b2ff67da).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.779534

► This research focuses on a solid-state planar unipolar nano-diode, known as a self-switching diode (SSD). The planar architecture of the SSD ensures the parasitic capacitance… (more)

▼ This research focuses on a solid-state planar unipolar nano-diode, known as a self-switching diode (SSD). The planar architecture of the SSD ensures the parasitic capacitance of this device much smaller than that of a vertical diode of comparable size, allowing a high working speed. SSDs have been successfully demonstrated as terahertz detectors operating up to 1.5 THz on a GaAs/AlGaAs two-dimensional electron gas (2DEG) wafer at room temperature and up to 2.5 THz on an InGaAs/InP 2DEG wafer at 150 K. To date, SSDs fabricated using GaAs and InGaAs have been extensively studied. The primary aim of this research is to explore SSDs on other promising materials such as InAs/AlSb because of its high electron mobility and GaN/AlGaN for potential high-power applications. First, InAs/AlSb-based SSDs were explored. The fast forming of native oxide of the AlSb layer presented a major challenge. This was effectively dealt with by the addition of 10% Gallium to the AlSb layer and a further coating of polymethyl methacrylate on the devices immediately after etching. Both DC and RF measurements were subsequently carried out to provide a proof of principle. The SSDs were found to have higher current at room temperature than those produced on GaAs and InGaAs 2DEG wafers. This was, to our knowledge, the first nanoelectronic device that was demonstrated using InAs/AlSb by wet etching. Noise performance of the SSD is crucial when it is used as a microwave or terahertz detector since low-frequency modulation is often used during detection. A noise characterisation setup based on a two-channel cross-correlation principle was developed, which is capable for SSDs with a wide range of impedance values. The noise setup was first used to characterise GaN/AlGaN-based SSDs. The effect of SSD design on the low-frequency noise was investigated. Results indicated that the measured low-frequency noise at various bias currents was dominated by flicker noise and described by Hooge's formula. The Hooge's constant was determined. We show that arranging a number of SSDs in parallel into an array effectively reduced the low-frequency noise and resulted in a lower corner frequency. Finally, the effect of filling a high-k dielectric material into the SSD nanotrenches was studied experimentally for the first time. A 100 nm thick, high-k SiNx film was applied using plasma-enhanced chemical vapour deposition. DC, RF and noise measurements were performed. The results demonstrated improved I-V characteristic, higher RF responsitivity and reduced low-frequency noise.

Subjects/Keywords: heterostructure; terahertz; high-k dielectric; self-switching diode; nano-diode; noise

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Zhang, L. (2014). Experimental studies on a planar unipolar nano-diode. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-a-planar-unipolar-nanodiode(1b08f0de-de92-4369-90d0-c8b3b2ff67da).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.779534

Chicago Manual of Style (16^th Edition):

Zhang, Linqing. “Experimental studies on a planar unipolar nano-diode.” 2014. Doctoral Dissertation, University of Manchester. Accessed January 19, 2021. https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-a-planar-unipolar-nanodiode(1b08f0de-de92-4369-90d0-c8b3b2ff67da).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.779534.

MLA Handbook (7^th Edition):

Zhang, Linqing. “Experimental studies on a planar unipolar nano-diode.” 2014. Web. 19 Jan 2021.

Vancouver:

Zhang L. Experimental studies on a planar unipolar nano-diode. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Jan 19]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-a-planar-unipolar-nanodiode(1b08f0de-de92-4369-90d0-c8b3b2ff67da).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.779534.

Council of Science Editors:

Zhang L. Experimental studies on a planar unipolar nano-diode. [Doctoral Dissertation]. University of Manchester; 2014. Available from: https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-a-planar-unipolar-nanodiode(1b08f0de-de92-4369-90d0-c8b3b2ff67da).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.779534

University of Minnesota

9. Perry, Trevor. Self-adjustment of Hearing Aid Amplification: Listener Preferences and Speech Recognition Performance.

Degree: PhD, Speech-Language-Hearing Sciences, 2019, University of Minnesota

URL: http://hdl.handle.net/11299/206634

► Self-adjustment of amplification parameters is a potential method for improving satisfaction with hearing aids, particularly in noisy environments. People with mild-to-moderate hearing loss adjusted gain… (more)

▼ Self-adjustment of amplification parameters is a potential method for improving satisfaction with hearing aids, particularly in noisy environments. People with mild-to-moderate hearing loss adjusted gain parameters in quiet and in several types of noise by using a simple touchscreen interface to control a research device which emulated the basic functionality of a digital hearing aid in real time. Results of self-adjustment indicated reliable individual preferences but a great deal of between-listener variability, indicating that people have stable preferences for amplification and are able to select preferred parameters consistently. The large individual differences suggest that preferred gain configurations can differ greatly from prescriptive settings in both quiet and in noise and underscore the need for an efficient method of customizing amplification parameters beyond prescribed settings. Audiological listener factors such as age, hearing loss, and experience using hearing aids, predicted little of the between-listener variability. It is unlikely that modifications to prescriptive fitting formulae based on the factors examined here would result in amplification parameters that are similar to user-customized settings. Most self-adjustments were completed in only a minute or two, demonstrating that self-adjustment is a rapid and efficient method for matching hearing aid output to preferred settings. When self-adjustments were made with speech presented at average conversational levels, gain adjustments did not strongly affect speech recognition within the range of signal-to-noise ratios tested. For speech at a lower presentation level, preferences for amplification were related to speech recognition performance, suggesting that listeners include their subjective sense of speech clarity among their criteria for selecting amplification parameters during self-adjustment. Self-adjusted amplification was overwhelmingly rated as satisfactory or very satisfactory and as producing a comfortable loudness. Taken together, the results of these experiments support the conclusion that for people with mild-to-moderate hearing loss, self-adjustment is likely to produce satisfactory and comfortable amplification that provides speech recognition comparable to that of hearing aids fit according to current clinical best practices.

Subjects/Keywords: Amplification; Background noise; Hearing aids; Hearing loss; Self-fitting; Speech perception

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Perry, T. (2019). Self-adjustment of Hearing Aid Amplification: Listener Preferences and Speech Recognition Performance. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/206634

Chicago Manual of Style (16^th Edition):

Perry, Trevor. “Self-adjustment of Hearing Aid Amplification: Listener Preferences and Speech Recognition Performance.” 2019. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021. http://hdl.handle.net/11299/206634.

MLA Handbook (7^th Edition):

Perry, Trevor. “Self-adjustment of Hearing Aid Amplification: Listener Preferences and Speech Recognition Performance.” 2019. Web. 19 Jan 2021.

Vancouver:

Perry T. Self-adjustment of Hearing Aid Amplification: Listener Preferences and Speech Recognition Performance. [Internet] [Doctoral dissertation]. University of Minnesota; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11299/206634.

Council of Science Editors:

Perry T. Self-adjustment of Hearing Aid Amplification: Listener Preferences and Speech Recognition Performance. [Doctoral Dissertation]. University of Minnesota; 2019. Available from: http://hdl.handle.net/11299/206634

University of Manchester

10. Singh, Arun Kumar. Nonlinear nanoelectronic devices operating at room temperature.

Degree: 2014, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217606

►

Innovative nanoelectronic device concepts that are beyond the scaling limits of silicon technology can have applications in future generation computations and communications, medical and security… (more)

▼

Innovative nanoelectronic device concepts that are beyond the scaling limits of silicon technology can have applications in future generation computations and communications, medical and security imaging, radio astronomy, etc. In particular, these devices may achieve a very high speed well beyond those of the conventional semiconductor devices. A variety of novel devices have recently been proposed including the ballistic rectifier and self-switching device (SSD). Compared with conventional rectifying diodes, both devices are based on entirely new working principles since they do not require any p-n junction or barrier structures. As a result, zero threshold voltage can be achieved, eliminating the need for a bias circuit. The planar nature of these devices means that the electrodes are placed side by side rather than on top of each other, which greatly reduces the parasitic capacitance and enables THz (1 THz = 1,000 GHz) speeds at room temperature. Despite previous work on the novel device working principles and high-speed operation, the devices have only been fabricated using conventional semiconductors. Furthermore, the research on their noise properties is so far very limited even though the device noise figures are almost as important as the speed when used as THz detectors. Manchester is the birthplace of graphene and both novel nanodevices have single-layered architecture, which is ideally-suited to use graphene as the active layer. Since the device speed generally scales with the carrier mobility, graphene based ballistic rectifiers and SSDs are expected to operate at THz frequencies. In this work, both mechanically exfoliated graphene flakes and chemical-vapour deposited graphene films have been used to fabricate the nanodevices for the first time. Their DC and radio-frequency performance have been characterised. Properties of graphene are strongly influenced by its immediate surroundings including any adsorbed molecules, interaction with the supporting substrate due to its large surface to volume ratio. Here, back-gate voltage induced hysteresis of electrical transport under normal atmospheric conditions is systematically investigated. Time-domain DC measurement and short pulse characterisation technique were employed to develop the understanding of such mechanisms, which will help to improve the stability and the reliability of graphene device properties.Finally, the noise properties of the ballistic rectifier were studied. Both thermal noise and flicker noise have been characterised. The findings have been discussed in the context of the mobility fluctuation based Hooge’s empirical relation. A physical model was also constructed on the noise of a narrow constriction, and the obtained analytical expression may be applicable to a wide range of nanodevices that consist of point-contact-like structures.

NIL

Advisors/Committee Members: Song, Aimin.

Subjects/Keywords: Ballistic rectifier; Self-switching device; Graphene; THz detector; Low-frequency noise; Flicker noise; Hysteresis; Nonlinear nanoelectronic device; Microwave detector; SSD

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Singh, A. K. (2014). Nonlinear nanoelectronic devices operating at room temperature. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217606

Chicago Manual of Style (16^th Edition):

Singh, Arun Kumar. “Nonlinear nanoelectronic devices operating at room temperature.” 2014. Doctoral Dissertation, University of Manchester. Accessed January 19, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217606.

MLA Handbook (7^th Edition):

Singh, Arun Kumar. “Nonlinear nanoelectronic devices operating at room temperature.” 2014. Web. 19 Jan 2021.

Vancouver:

Singh AK. Nonlinear nanoelectronic devices operating at room temperature. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Jan 19]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217606.

Council of Science Editors:

Singh AK. Nonlinear nanoelectronic devices operating at room temperature. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217606

University of Manchester

11. Singh, Arun. Nonlinear nanoelectronic devices operating at room temperature.

Degree: PhD, 2014, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/nonlinear-nanoelectronic-devices-operating-at-room-temperature(e9abb297-547f-4d5e-908a-e371ccefa50b).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.771303

► Innovative nanoelectronic device concepts that are beyond the scaling limits of silicon technology can have applications in future generation computations and communications, medical and security… (more)

▼ Innovative nanoelectronic device concepts that are beyond the scaling limits of silicon technology can have applications in future generation computations and communications, medical and security imaging, radio astronomy, etc. In particular, these devices may achieve a very high speed well beyond those of the conventional semiconductor devices. A variety of novel devices have recently been proposed including the ballistic rectifier and self-switching device (SSD). Compared with conventional rectifying diodes, both devices are based on entirely new working principles since they do not require any p-n junction or barrier structures. As a result, zero threshold voltage can be achieved, eliminating the need for a bias circuit. The planar nature of these devices means that the electrodes are placed side by side rather than on top of each other, which greatly reduces the parasitic capacitance and enables THz (1 THz = 1,000 GHz) speeds at room temperature. Despite previous work on the novel device working principles and high-speed operation, the devices have only been fabricated using conventional semiconductors. Furthermore, the research on their noise properties is so far very limited even though the device noise figures are almost as important as the speed when used as THz detectors. Manchester is the birthplace of graphene and both novel nanodevices have single-layered architecture, which is ideally-suited to use graphene as the active layer. Since the device speed generally scales with the carrier mobility, graphene based ballistic rectifiers and SSDs are expected to operate at THz frequencies. In this work, both mechanically exfoliated graphene flakes and chemical-vapour deposited graphene films have been used to fabricate the nanodevices for the first time. Their DC and radio-frequency performance have been characterised. Properties of graphene are strongly influenced by its immediate surroundings including any adsorbed molecules, interaction with the supporting substrate due to its large surface to volume ratio. Here, back-gate voltage induced hysteresis of electrical transport under normal atmospheric conditions is systematically investigated. Time-domain DC measurement and short pulse characterisation technique were employed to develop the understanding of such mechanisms, which will help to improve the stability and the reliability of graphene device properties. Finally, the noise properties of the ballistic rectifier were studied. Both thermal noise and flicker noise have been characterised. The findings have been discussed in the context of the mobility fluctuation based Hooge's empirical relation. A physical model was also constructed on the noise of a narrow constriction, and the obtained analytical expression may be applicable to a wide range of nanodevices that consist of point-contact-like structures.

Subjects/Keywords: SSD; Microwave detector; Nonlinear nanoelectronic device; Hysteresis; Flicker noise; THz detector; Graphene; Self-switching device; Ballistic rectifier; Low-frequency noise

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Singh, A. (2014). Nonlinear nanoelectronic devices operating at room temperature. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/nonlinear-nanoelectronic-devices-operating-at-room-temperature(e9abb297-547f-4d5e-908a-e371ccefa50b).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.771303

Chicago Manual of Style (16^th Edition):

Singh, Arun. “Nonlinear nanoelectronic devices operating at room temperature.” 2014. Doctoral Dissertation, University of Manchester. Accessed January 19, 2021. https://www.research.manchester.ac.uk/portal/en/theses/nonlinear-nanoelectronic-devices-operating-at-room-temperature(e9abb297-547f-4d5e-908a-e371ccefa50b).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.771303.

MLA Handbook (7^th Edition):

Singh, Arun. “Nonlinear nanoelectronic devices operating at room temperature.” 2014. Web. 19 Jan 2021.

Vancouver:

Singh A. Nonlinear nanoelectronic devices operating at room temperature. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Jan 19]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/nonlinear-nanoelectronic-devices-operating-at-room-temperature(e9abb297-547f-4d5e-908a-e371ccefa50b).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.771303.

Council of Science Editors:

Singh A. Nonlinear nanoelectronic devices operating at room temperature. [Doctoral Dissertation]. University of Manchester; 2014. Available from: https://www.research.manchester.ac.uk/portal/en/theses/nonlinear-nanoelectronic-devices-operating-at-room-temperature(e9abb297-547f-4d5e-908a-e371ccefa50b).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.771303

Delft University of Technology

12. Mayer, Jonathan (author). Active Change of Permeable Material Properties for Low-Noise Trailing Edge Applications.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:347c4509-16bc-4728-acb2-32a8ccec1c10

►

For many aerospace applications, the dominant airfoil self-noise source is Turbulent Boundary Layer Trailing Edge (TBL-TE) noise. The replacement of solid airfoil trailing edges with… (more)

▼

For many aerospace applications, the dominant airfoil self-noise source is Turbulent Boundary Layer Trailing Edge (TBL-TE) noise. The replacement of solid airfoil trailing edges with permeable materials proved to be an adequate noise reduction mean in previous studies. This thesis project contributes to the development of innovative permeable materials by assessing the feasibility of actively influencing their noise mitigation characteristics. The proposed activation mechanism consists of heating up a polymerically coated, porous trailing edge and thereby influencing the material geometry and seepage fluid properties. Heating of the polymeric coating layer led to slightly decreasing pore diameters due to thermal expansion. The main limitation of actively changing the porous material geometry on a pore-scale level was the restriction of the coating layer thickness. Heating effects on the seepage flow through porous metal foams were analyzed experimentally. Characteristic material parameters, namely flow resistivity, permeability and form coefficient, were measured for varying fluid temperatures and it was shown that for low seepage velocities, the pressure communication across the material was negatively affected upon heating. The feasibility of actively changing far-field noise characteristics was demonstrated based on acoustic measurements in an anechoic wind tunnel. Increasing sound pressure levels were observed for both, coated and uncoated porous trailing edges upon heating. It is concluded that the dominant activation effect was the reduced communication across the porous trailing edge due to an increase in fluid temperature. The expansion of polymeric coating was not sufficient to alter the noise mitigation behavior of the porous trailing edge. Furthermore, no interactions between turbulent boundary layer wall pressure fluctuations and the soft coating layer were observed. However, it was shown that temperature control of the porous material offers a possibility to actively influence flow resistivity without modifying the geometrical structure.

Aerospace engineering

Advisors/Committee Members: Ragni, Daniele (mentor), Kotsonis, Marios (graduation committee), van der Zwaag, Sybrand (graduation committee), Rubio Carpio, Alejandro (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: porous material; trailing edge noise; polymeric coating; airfoil self-noise; trailing edge heating; aeroacoustic; permeable material

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Mayer, J. (. (2019). Active Change of Permeable Material Properties for Low-Noise Trailing Edge Applications. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:347c4509-16bc-4728-acb2-32a8ccec1c10

Chicago Manual of Style (16^th Edition):

Mayer, Jonathan (author). “Active Change of Permeable Material Properties for Low-Noise Trailing Edge Applications.” 2019. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:347c4509-16bc-4728-acb2-32a8ccec1c10.

MLA Handbook (7^th Edition):

Mayer, Jonathan (author). “Active Change of Permeable Material Properties for Low-Noise Trailing Edge Applications.” 2019. Web. 19 Jan 2021.

Vancouver:

Mayer J(. Active Change of Permeable Material Properties for Low-Noise Trailing Edge Applications. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:347c4509-16bc-4728-acb2-32a8ccec1c10.

Council of Science Editors:

Mayer J(. Active Change of Permeable Material Properties for Low-Noise Trailing Edge Applications. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:347c4509-16bc-4728-acb2-32a8ccec1c10

Virginia Tech

13. Wirsing, Karlton. Application of Wavelets to Filtering and Analysis of Self-Similar Signals.

Degree: MS, Electrical and Computer Engineering, 2014, Virginia Tech

URL: http://hdl.handle.net/10919/78087

► Digital Signal Processing has been dominated by the Fourier transform since the Fast Fourier Transform (FFT) was developed in 1965 by Cooley and Tukey. In… (more)

▼ Digital Signal Processing has been dominated by the Fourier transform since the Fast Fourier Transform (FFT) was developed in 1965 by Cooley and Tukey. In the 1980's a new transform was developed called the wavelet transform, even though the first wavelet goes back to 1910. With the Fourier transform, all information about localized changes in signal features are spread out across the entire signal space, making local features global in scope. Wavelets are able to retain localized information about the signal by applying a function of a limited duration, also called a wavelet, to the signal. As with the Fourier transform, the discrete wavelet transform has an inverse transform, which allows us to make changes in a signal in the wavelet domain and then transform it back in the time domain. In this thesis, we have investigated the filtering properties of this technique and analyzed its performance under various settings. Another popular application of wavelet transform is data compression, such as described in the JPEG 2000 standard and compressed digital storage of fingerprints developed by the FBI. Previous work on filtering has focused on the discrete wavelet transform. Here, we extended that method to the stationary wavelet transform and found that it gives a performance boost of as much as 9 dB over that of the discrete wavelet transform. We also found that the SNR of noise filtering decreases as a frequency of the base signal increases up to the Nyquist limit for both the discrete and stationary wavelet transforms. Besides filtering the signal, the discrete wavelet transform can also be used to estimate the standard deviation of the white noise present in the signal. We extended the developed estimator for the discrete wavelet transform to the stationary wavelet transform. As with filtering, it is found that the quality of the estimate decreases as the frequency of the base signal increases. Many interesting signals are self-similar, which means that one of their properties is invariant on many different scales. One popular example is strict self-similarity, where an exact copy of a signal is replicated on many scales, but the most common property is statistical self-similarity, where a random segment of a signal is replicated on many different scales. In this work, we investigated wavelet-based methods to detect statistical self-similarities in a signal and their performance on various types of self-similar signals. Specifically, we found that the quality of the estimate depends on the type of the units of the signal being investigated for low Hurst exponent and on the type of edge padding being used for high Hurst exponent. Advisors/Committee Members: Mili, Lamine M. (committeechair), Pratt, Timothy J. (committee member), Beex, A. A. Louis (committee member).

Subjects/Keywords: Hurst Exponent; Threshold Function; Vanishing Moment; Stationary Wavelet Transform; Discrete Wavelet Transform; Symlet; Coiflet; Daubechies Wavelet; White Noise; Red Noise; Pink Noise; Long Memory; Self-Similarity; Fractal

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

APA (6^th Edition):

Wirsing, K. (2014). Application of Wavelets to Filtering and Analysis of Self-Similar Signals. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/78087

Chicago Manual of Style (16^th Edition):

Wirsing, Karlton. “Application of Wavelets to Filtering and Analysis of Self-Similar Signals.” 2014. Masters Thesis, Virginia Tech. Accessed January 19, 2021. http://hdl.handle.net/10919/78087.

MLA Handbook (7^th Edition):

Wirsing, Karlton. “Application of Wavelets to Filtering and Analysis of Self-Similar Signals.” 2014. Web. 19 Jan 2021.

Vancouver:

Wirsing K. Application of Wavelets to Filtering and Analysis of Self-Similar Signals. [Internet] [Masters thesis]. Virginia Tech; 2014. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10919/78087.

Council of Science Editors:

Wirsing K. Application of Wavelets to Filtering and Analysis of Self-Similar Signals. [Masters Thesis]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/78087

NSYSU

14. Wang, Hsin-Min. Study on WDM Lightwave Systems for the Access Application and Transoceanic Application.

Degree: PhD, Electro-Optical Engineering, 2011, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0628111-161637

► The wavelength-division multiplexing (WDM) is a well know technique capable of increasing the total capacity of a lightwave communication system; however, the system performance can… (more)

Subjects/Keywords: cross-phase modulation; nonlinear phase noise; four-wave mixing; self-phase modulation

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

APA (6^th Edition):

Wang, H. (2011). Study on WDM Lightwave Systems for the Access Application and Transoceanic Application. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0628111-161637

Chicago Manual of Style (16^th Edition):

Wang, Hsin-Min. “Study on WDM Lightwave Systems for the Access Application and Transoceanic Application.” 2011. Doctoral Dissertation, NSYSU. Accessed January 19, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0628111-161637.

MLA Handbook (7^th Edition):

Wang, Hsin-Min. “Study on WDM Lightwave Systems for the Access Application and Transoceanic Application.” 2011. Web. 19 Jan 2021.

Vancouver:

Wang H. Study on WDM Lightwave Systems for the Access Application and Transoceanic Application. [Internet] [Doctoral dissertation]. NSYSU; 2011. [cited 2021 Jan 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0628111-161637.

Council of Science Editors:

Wang H. Study on WDM Lightwave Systems for the Access Application and Transoceanic Application. [Doctoral Dissertation]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0628111-161637

NSYSU

15. Lee, Ming. Joint Carrier Frequency Offset Estimation and Self-Interference Cancellation Design in Full-duplex OFDM-based Systems.

Degree: Master, Communications Engineering, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0917116-022020

► Full-duplex (FD) orthogonal frequency division multiplexing (OFDM) systems substantially provide higher spectral efficiency due to simultaneous communication of the uplink and downlink. However, phase noise… (more)

Subjects/Keywords: carrier frequency offset (CFO); channel estimation; phase noise (PHN); self-interference (SI); Full-duplex (FD)

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

APA (6^th Edition):

Lee, M. (2016). Joint Carrier Frequency Offset Estimation and Self-Interference Cancellation Design in Full-duplex OFDM-based Systems. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0917116-022020

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):

Lee, Ming. “Joint Carrier Frequency Offset Estimation and Self-Interference Cancellation Design in Full-duplex OFDM-based Systems.” 2016. Thesis, NSYSU. Accessed January 19, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0917116-022020.

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

MLA Handbook (7^th Edition):

Lee, Ming. “Joint Carrier Frequency Offset Estimation and Self-Interference Cancellation Design in Full-duplex OFDM-based Systems.” 2016. Web. 19 Jan 2021.

Vancouver:

Lee M. Joint Carrier Frequency Offset Estimation and Self-Interference Cancellation Design in Full-duplex OFDM-based Systems. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Jan 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0917116-022020.

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

Council of Science Editors:

Lee M. Joint Carrier Frequency Offset Estimation and Self-Interference Cancellation Design in Full-duplex OFDM-based Systems. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0917116-022020

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

University of California – San Diego

16. Kanar, Tumay. Built-in-Self-Test Circuits for Wideband Phased Arrays and Circuits for Millimeter-wave Radiometry and Low-noise Applications.

Degree: Electrical Engineering (Electronic Circuits and Systems), 2015, University of California – San Diego

URL: http://www.escholarship.org/uc/item/2sj4j7jg

► The thesis presents wide-band built-in self-test circuits (BIST) for phased array systems and high performance circuits for millimeter-wave radiometry and low-noise applications. The 2-15 GHz… (more)

▼ The thesis presents wide-band built-in self-test circuits (BIST) for phased array systems and high performance circuits for millimeter-wave radiometry and low-noise applications. The 2-15 GHz BIST is designed using a resistive wide-band coupler at the input of each channel and an on-chip oscillator is employed for the test signal and local oscillator generation. An on-chip 8-phase self-correcting I/Q vector receiver and algorithm are introduced for wide-band accuracy. Using the I/Q outputs from 8 different LO phases for one-time calibration, the DC offset, gain and phase imbalance for the system can be determined at each frequency point and eliminated. The BIST can be done at a rate of 1 MHz with greater than 50 dB signal-to-noise-ratio (SNR) and allows for accurate characterization of the phased array by providing relative gain and phase measurements over a wide frequency range. The BIST results agree well with the VNA measurements, and the 2-15 GHz BIST can determine the channel's relative phase and gain error with 3 and 0.3 dB accuracy, respectively. An RMS detector network is also implemented for absolute gain measurements, and the absolute gain is measured using a pair of detectors located at the input and the output ports. The BIST can measure the absolute gain with 0.5 dB accuracy at 2-15 GHz, and this feature can be employed to detect under-performing units in the field for self-healing mechanisms.Next, a D-band radiometer centered at 136 GHz is presented. The radiometer is realized with a 35 dB gain low-noise amplifier and a detector in the IBM 90 nm SiGe BiCMOS process. The on-chip radiometer results in a measured minimum NEP of 1.4 fW/Hz1/2 and a peak responsivity of 52 MV/W. With a low 1/f corner frequency (<100 Hz) and a noise bandwidth >10 GHz, this system is suitable for high-resolution imaging applications. For an integration time of 3.125 mS, the minimum noise equivalent temperature difference (NETD) is measured to be 0.25K using different independent methods and is the lowest NETD demonstrated in silicon technologies at D-band frequencies.Finally, X- and K-band low-noise amplifiers (LNA) in a 0.18 μm SiGe BiCMOS process are presented with measured mean noise figure of 1.2 dB and 2.2 dB, respectively. A method of noise match optimization with respect to base inductance in SiGe LNA design with large transistors is proposed and explained in detail. The LNAs result in peak gain of 24.2 and 19 dB at 8.5 and 19.5 GHz and IIP3 of -11 and -4 dBm at 10 and 20 GHz, respectively. To the authors' best knowledge, these results outperform all available CMOS designs and achieve the lowest mean noise figure at X- and K-bands in any SiGe or CMOS process at the time of publication. Another K-band LNA is also implemented in 45 nm IBM CMOS SOI process and results in 2.2 dB mean noise figure with 19 dB peak gain. The details of this design are presented in the appendix.

Subjects/Keywords: Electrical engineering; built-in self-test; low noise amplifiers; millimeter wave imaging; phased arrays; radiometer

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

APA (6^th Edition):

Kanar, T. (2015). Built-in-Self-Test Circuits for Wideband Phased Arrays and Circuits for Millimeter-wave Radiometry and Low-noise Applications. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/2sj4j7jg

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):

Kanar, Tumay. “Built-in-Self-Test Circuits for Wideband Phased Arrays and Circuits for Millimeter-wave Radiometry and Low-noise Applications.” 2015. Thesis, University of California – San Diego. Accessed January 19, 2021. http://www.escholarship.org/uc/item/2sj4j7jg.

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

MLA Handbook (7^th Edition):

Kanar, Tumay. “Built-in-Self-Test Circuits for Wideband Phased Arrays and Circuits for Millimeter-wave Radiometry and Low-noise Applications.” 2015. Web. 19 Jan 2021.

Vancouver:

Kanar T. Built-in-Self-Test Circuits for Wideband Phased Arrays and Circuits for Millimeter-wave Radiometry and Low-noise Applications. [Internet] [Thesis]. University of California – San Diego; 2015. [cited 2021 Jan 19]. Available from: http://www.escholarship.org/uc/item/2sj4j7jg.

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

Council of Science Editors:

Kanar T. Built-in-Self-Test Circuits for Wideband Phased Arrays and Circuits for Millimeter-wave Radiometry and Low-noise Applications. [Thesis]. University of California – San Diego; 2015. Available from: http://www.escholarship.org/uc/item/2sj4j7jg

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

Université Paris-Sud – Paris XI

17. Grimaldi, Eva. Étude des propriétés non-linéaires et de l’origine du bruit d’oscillateurs à transfert de spin à base de vortex : vers le développement de nano-dispositifs radiofréquences spintroniques : Study of the origin of noise and the nonlinear properties of vortex based spin transfer oscillators : towards the development of spintronic radio-frequency nano-devices.

Degree: Docteur es, Physique, 2015, Université Paris-Sud – Paris XI

URL: http://www.theses.fr/2015PA112082

► L’objectif principal de cette thèse vise la compréhension et la maitrise des mécanismes physiques menant à l’excitation du mode gyrotropique de vortex magnétique par transfert… (more)

▼ L’objectif principal de cette thèse vise la compréhension et la maitrise des mécanismes physiques menant à l’excitation du mode gyrotropique de vortex magnétique par transfert de spin, et en particulier l’origine des sources de bruit affectant sa dynamique. Ce travail est effectué dans la perspective de parvenir à l’amélioration des propriétés radiofréquences de ces dispositifs appelés Spin Transfer Oscillator.En effet, ces oscillateurs ont l’avantage d’être de taille submicronique (quelques dizaines à quelques centaines de nm), d’être compatibles avec les technologies CMOS et d’être résistants aux radiations. De plus, les mécanismes d’aimantation mis en jeu leur assurent une forte dépendance de la fréquence avec le courant, i.e. une bonne accordabilité, ainsi qu’une réponse dynamique rapide i.e. une agilité élevée. Cependant, différentes questions restent en suspens quant à la possibilité d’améliorer leurs conditions d’oscillations, leur puissance et la cohérence de leurs oscillations.Un premier aspect de mon travail de thèse a été d’étudier l’influence des fluctuations thermiques sur la dynamique entretenue du mode gyrotropique du cœur de vortex. Un des résultats a été de montrer que le bruit de phase du mode gyrotropique résulte majoritairement de fluctuations de phase issues directement des fluctuations thermiques auxquelles s’ajoutent des fluctuations d’amplitude converties en fluctuations de phase. Grâce à un modèle analytique, nous avons pu mettre en évidence le rôle important joué par les non-linéarités des forces agissant sur le vortex. De plus, nous avons pu mesurer les paramètres caractéristiques de l’oscillateur, à savoir, la rapidité à changer sa fréquence mais aussi le facteur de couplage amplitude-phase.La seconde étape de mes travaux a consisté à améliorer les conditions d’obtention de signal rf. Un résultat majeur de ce travail a été l’obtention d’un signal rf puissant en absence de champ magnétique. Les puissances mesurées sont de quelques centaines de µW correspondant à des largeurs de raie faibles allant de quelques centaines de kHz à quelques MHz. Cette spécificité est rendue possible pour une structure complexe de l’oscillateur où la couche magnétique qui polarise en spin le courant a une aimantation perpendiculaire et est différente de la couche de référence pour la magnétorésistance.La troisième étape a été d’optimiser le rendement de l’oscillateur. Un des résultats marquants est que nous avons pu mesurer une puissance rf émise record s’élevant à 3.6 µW, encore jamais obtenue à température ambiante pour les oscillateurs à transfert de spin à base de vortex. Ces fortes puissances résultent du développement de nouvelles jonctions à base de FeB effectués par le groupe de S. Yuasa (AIST, Japon) pour lesquelles l’amélioration de la qualité de la jonction, nous a permis d’obtenir une magnétorésistance atteignant 125% .La faible taille de l’oscillateur a donc un coût qui se paye en termes de bruit de phase. Une solution qui permettrait de résoudre cette limitation et d’améliorer la cohérence des… Advisors/Committee Members: Cros, Vincent (thesis director).

Subjects/Keywords: Vortex magnétique; Bruit; Auto-synchronisation; Excitation paramétrique; Magnetic vortex; Noise; Self-synchronization; Parametric excitation

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APA (6^th Edition):

Grimaldi, E. (2015). Étude des propriétés non-linéaires et de l’origine du bruit d’oscillateurs à transfert de spin à base de vortex : vers le développement de nano-dispositifs radiofréquences spintroniques : Study of the origin of noise and the nonlinear properties of vortex based spin transfer oscillators : towards the development of spintronic radio-frequency nano-devices. (Doctoral Dissertation). Université Paris-Sud – Paris XI. Retrieved from http://www.theses.fr/2015PA112082

Chicago Manual of Style (16^th Edition):

Grimaldi, Eva. “Étude des propriétés non-linéaires et de l’origine du bruit d’oscillateurs à transfert de spin à base de vortex : vers le développement de nano-dispositifs radiofréquences spintroniques : Study of the origin of noise and the nonlinear properties of vortex based spin transfer oscillators : towards the development of spintronic radio-frequency nano-devices.” 2015. Doctoral Dissertation, Université Paris-Sud – Paris XI. Accessed January 19, 2021. http://www.theses.fr/2015PA112082.

MLA Handbook (7^th Edition):

Grimaldi, Eva. “Étude des propriétés non-linéaires et de l’origine du bruit d’oscillateurs à transfert de spin à base de vortex : vers le développement de nano-dispositifs radiofréquences spintroniques : Study of the origin of noise and the nonlinear properties of vortex based spin transfer oscillators : towards the development of spintronic radio-frequency nano-devices.” 2015. Web. 19 Jan 2021.

Vancouver:

Grimaldi E. Étude des propriétés non-linéaires et de l’origine du bruit d’oscillateurs à transfert de spin à base de vortex : vers le développement de nano-dispositifs radiofréquences spintroniques : Study of the origin of noise and the nonlinear properties of vortex based spin transfer oscillators : towards the development of spintronic radio-frequency nano-devices. [Internet] [Doctoral dissertation]. Université Paris-Sud – Paris XI; 2015. [cited 2021 Jan 19]. Available from: http://www.theses.fr/2015PA112082.

Council of Science Editors:

Grimaldi E. Étude des propriétés non-linéaires et de l’origine du bruit d’oscillateurs à transfert de spin à base de vortex : vers le développement de nano-dispositifs radiofréquences spintroniques : Study of the origin of noise and the nonlinear properties of vortex based spin transfer oscillators : towards the development of spintronic radio-frequency nano-devices. [Doctoral Dissertation]. Université Paris-Sud – Paris XI; 2015. Available from: http://www.theses.fr/2015PA112082

University of Ottawa

18. Loeb, Andrew. Subjectivity and Music in Early Modern English Drama .

Degree: 2015, University of Ottawa

URL: http://hdl.handle.net/10393/32129

► Music in the early modern world was an art form fraught with tensions. Writers from a wide variety of backgrounds and disciplines engaged in a… (more)

▼ Music in the early modern world was an art form fraught with tensions. Writers from a wide variety of backgrounds and disciplines engaged in a vibrant debate about the value of hearing and playing music, which could be seen as a useful tool for the refinement of the individual or a dangerous liability, capable of compelling inappropriate thoughts, feelings, and behaviours. This study analyzes music on the early modern stage and its relation to emerging ideas about subjectivity. Early modern philosophies of music, I demonstrate, are concerned with the stability of the body, the soul, and the humours and spirits that unite them, along with the individual’s capacity for autonomy and agency. In the theatre, I argue, music is frequently deployed as a strategy for experimenting with ways of imagining and performing selfhood. On one hand, it can facilitate self-fashioning, acting as a marker for such characteristics as class and spiritual condition; on the other, it can be disruptive to identity and the capacity for agency and autonomy, since music was understood as both penetrative and transformative, facilitating the disruption of one self by an other. Chapter 1, “Meanings of Music in Early Modern England,” surveys a range of early modern texts on music to demonstrate their concerns with both the performance of the self and the threat of its dissolution. Chapter 2, “Many Sorts of Music in Twelfth Night and The Roaring Girl,” examines music’s role as an imaginative strategy for improvising an unstable, hybrid gender identity, an alternative subject-position from which to speak and act in ways ordinarily denied to women. Chapter 3, “Music, Magic, and Community in Early Modern Witchcraft Plays,” explores witches’ uses of music to establish a sense of communal identity and to magically disrupt the communities from which they have been excluded. Finally, Chapter 4, “Noise, the City, and the Subject in Epicoene” makes a case for understanding Morose’s fear of noise in terms of early modern ideas about music, reading noise as a radical instability representative of new ways of fashioning selves in a rapidly expanding urban environment.

Subjects/Keywords: Music; Drama; Subjectivity; Self; England; Early Modern; Renaissance; Theatre; Gender; Noise; Performance; Song

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APA (6^th Edition):

Loeb, A. (2015). Subjectivity and Music in Early Modern English Drama . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/32129

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):

Loeb, Andrew. “Subjectivity and Music in Early Modern English Drama .” 2015. Thesis, University of Ottawa. Accessed January 19, 2021. http://hdl.handle.net/10393/32129.

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

MLA Handbook (7^th Edition):

Loeb, Andrew. “Subjectivity and Music in Early Modern English Drama .” 2015. Web. 19 Jan 2021.

Vancouver:

Loeb A. Subjectivity and Music in Early Modern English Drama . [Internet] [Thesis]. University of Ottawa; 2015. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10393/32129.

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

Council of Science Editors:

Loeb A. Subjectivity and Music in Early Modern English Drama . [Thesis]. University of Ottawa; 2015. Available from: http://hdl.handle.net/10393/32129

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

Delft University of Technology

19. Jousma, Werner (author). Sky-dive Cavity Buffeting Noise Reduction.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:54552d42-d0b6-4356-b3b4-049ad305a505

► Cavity buffeting noise is the main contributor to discomfort in sky-dive tunnels. Low frequency noise, generated by self-sustained cavity shear-layer oscillations, similar to automotive sunroof-buffeting… (more)

▼ Cavity buffeting noise is the main contributor to discomfort in sky-dive tunnels. Low frequency noise, generated by self-sustained cavity shear-layer oscillations, similar to automotive sunroof-buffeting noise and side-window buffeting noise, is observed in sky-dive tunnels. Typical low frequencies are not conventionally audible to the human ear: registration of this phenomenon occurs due to the high strength of the oscillations felt on the inner-ear. Long-term exposure to high intensity low frequency noise can be experienced as fatiguing and annoying. A design Study of Streamlines Design BV has shown a fully effective design solution by simulation, which proved to be ineffective in real-life. The current study deals with validation of a different numerical set-up and the analysis of various retrofit designs for the reduction of sky-dive buffeting noise. Existing literature has shown the promising results for the use of compressible computational fluid dynamics solvers, combined with detached eddy simulation for similar problems. The computational cost of detached eddy simulation has been found within the computational resources for this thesis, opposed to large eddy simulation or direct numerical simulation. For this thesis, the delayed detached eddy simulation model has been used. For the acquisition of validation data a Scanivalve DSA3217 pressure scanner has been used. For computational fluid dynamics and experiments, pressure has been probed at the same location in the cavity. Four retrofit designs have been proposed for analysis in this thesis: trailing edge extension, wall normal cylinder, span wise cylinder and a wing. Simulations have been conducted for one specific tunnel velocity and experiments for a full range of operating set-points. Simulations have shown reductions of 6.0 dB and 2.6 dB for respectively the trailing edge extension and the wing in sound pressure levels of cavity buffeting noise. Furthermore an increase of 3.6 dB and 1.5 dB have been observed for respectively the span wise cylinder and wall normal cylinder. A reduction of the wake by 5.2% has been observed for the trailing edge extension, where the other designs increased the wake. For the clear reduction in sound pressure level, introduced by the trailing edge extension, the formation of a larger scale vortex has been delayed downstream compared to the current situation. Visualising the vortices in the case of the span wise cylinder, it has been found that the formation of the large scale vortex has been triggered further upstream compared to the current situation, possibly due to interaction with cylinder vortex shedding. Comparison of simulation and experiment data has shown errors of 11.8% in sound pressure level for the current situation and 17.6% when the trailing edge extension is employed. The reduction in experiment has been observed to be stronger than in simulation. An evaluation experiment has shown the effectiveness of the trailing edge extension for all tunnel velocities at which… Advisors/Committee Members: van Zuijlen, Alexander (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Buffeting; Sky-dive tunnel; Cavity; CFD; Self-sustained oscillation; Noise; Comfort; Experimental; Validation

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

APA (6^th Edition):

Jousma, W. (. (2018). Sky-dive Cavity Buffeting Noise Reduction. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:54552d42-d0b6-4356-b3b4-049ad305a505

Chicago Manual of Style (16^th Edition):

Jousma, Werner (author). “Sky-dive Cavity Buffeting Noise Reduction.” 2018. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:54552d42-d0b6-4356-b3b4-049ad305a505.

MLA Handbook (7^th Edition):

Jousma, Werner (author). “Sky-dive Cavity Buffeting Noise Reduction.” 2018. Web. 19 Jan 2021.

Vancouver:

Jousma W(. Sky-dive Cavity Buffeting Noise Reduction. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:54552d42-d0b6-4356-b3b4-049ad305a505.

Council of Science Editors:

Jousma W(. Sky-dive Cavity Buffeting Noise Reduction. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:54552d42-d0b6-4356-b3b4-049ad305a505

Louisiana State University

20. Mecholsky, Kristopher. Adaptation as Anarchist: A Complexity Method for Ideology-Critique of American Crime Narratives.

Degree: PhD, English Language and Literature, 2012, Louisiana State University

URL: etd-07092012-155952 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3247

► Particularly through their relation to ideology, crime narrative adaptations expose the conflict between individuals and communities on one side and the State on the other.… (more)

▼ Particularly through their relation to ideology, crime narrative adaptations expose the conflict between individuals and communities on one side and the State on the other. Adaptations take the already defamiliarizing effect of narrative and continue to defamiliarize, creating a narrative cubist effect through various audiences and discursive orderings of events. Hence, they question the ideological prefiguring that lies at the foundation of narrative understanding. Insofar as ideologies are simplified ways to legitimate actions and project images of identity, the fact that a society’s narratives necessarily inherit ideology from the State obscures that society and State’s inevitable deviations from their self-images. Ideology misrepresents that which it attempts to legitimate. In order to critique ideological influence, the position from which total, reflective cultural study can extend is the vantage point that consistently and actively questions culture to its limits. It can only come from a position in which the audience’s freedom from domination is maximized. Cultural study and criticism thus arises most completely and honestly when it comes as close as it can from without ideology. By definition, the opposite of ideology is anarchy. In this dissertation I argue that adaptations channel a mechanism by which anarchist principles emerge from the ideological constraints obliged by the State’s pursuit of legitimacy—constraints which are inherent in all cultural narratives. Focusing on transatlantic “narrativizations” of crime events—different tellings of historical criminal events in view of American and European interaction—I demonstrate that adaptations, as dynamic systems of discourse, are self-driven toward anarchist critiques that splinter traditional Western ideologies. Overall, I make a three-part argument, first suggesting a method (based in complexity theory) for critical adaptation studies, then using that method to demonstrate how transatlantic America crime narrative adaptations reveal cultural identity struggles and necessarily tend toward anarchism, and lastly describing how the process of adaptation likewise reflects anarchist principles. Adaptation is anarchist. The anarchist method of adaptation study I propose will indicate 1) the degree to which American crime narrative adaptations stem from and contribute to various ideologies, and 2) how they can make clear those ideologies through necessary, consistent defamiliarization.

Subjects/Keywords: narratology; noise; anarchism; self-organized criticality; Billy Budd; crime fiction; information theory; chaos theory

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APA (6^th Edition):

Mecholsky, K. (2012). Adaptation as Anarchist: A Complexity Method for Ideology-Critique of American Crime Narratives. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-07092012-155952 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3247

Chicago Manual of Style (16^th Edition):

Mecholsky, Kristopher. “Adaptation as Anarchist: A Complexity Method for Ideology-Critique of American Crime Narratives.” 2012. Doctoral Dissertation, Louisiana State University. Accessed January 19, 2021. etd-07092012-155952 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3247.

MLA Handbook (7^th Edition):

Mecholsky, Kristopher. “Adaptation as Anarchist: A Complexity Method for Ideology-Critique of American Crime Narratives.” 2012. Web. 19 Jan 2021.

Vancouver:

Mecholsky K. Adaptation as Anarchist: A Complexity Method for Ideology-Critique of American Crime Narratives. [Internet] [Doctoral dissertation]. Louisiana State University; 2012. [cited 2021 Jan 19]. Available from: etd-07092012-155952 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3247.

Council of Science Editors:

Mecholsky K. Adaptation as Anarchist: A Complexity Method for Ideology-Critique of American Crime Narratives. [Doctoral Dissertation]. Louisiana State University; 2012. Available from: etd-07092012-155952 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3247

Delft University of Technology

21. Pröbsting, S. Airfoil Self-Noise - Investigation with Particle Image Velocimetry.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a

► Noise generated aerodynamically by the airflow over a lifting surface is often of concern for applications as diverse as air and ground transportation, heating, ventilation,… (more)

Subjects/Keywords: aeroacoustics; particle image velocimetry; fluid mechanics; trailing edge noise; airfoil self-noise

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APA (6^th Edition):

Pröbsting, S. (2015). Airfoil Self-Noise - Investigation with Particle Image Velocimetry. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a

Chicago Manual of Style (16^th Edition):

Pröbsting, S. “Airfoil Self-Noise - Investigation with Particle Image Velocimetry.” 2015. Doctoral Dissertation, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a.

MLA Handbook (7^th Edition):

Pröbsting, S. “Airfoil Self-Noise - Investigation with Particle Image Velocimetry.” 2015. Web. 19 Jan 2021.

Vancouver:

Pröbsting S. Airfoil Self-Noise - Investigation with Particle Image Velocimetry. [Internet] [Doctoral dissertation]. Delft University of Technology; 2015. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a.

Council of Science Editors:

Pröbsting S. Airfoil Self-Noise - Investigation with Particle Image Velocimetry. [Doctoral Dissertation]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; urn:NBN:nl:ui:24-uuid:8a938547-a829-4a79-b77c-a92633a9652a ; http://resolver.tudelft.nl/uuid:8a938547-a829-4a79-b77c-a92633a9652a

University of Alberta

22. Vaezi, Yoones. Applications of Seismic Interferometry in Microseismic Monitoring.

Degree: PhD, Department of Physics, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/cb2773v954

► Microseismic monitoring involves the acquisition of continuous seismic data for the purpose of locating and characterizing microseismicity induced mainly by oilfield completion and production processes.… (more)

▼ Microseismic monitoring involves the acquisition of continuous seismic data for the purpose of locating and characterizing microseismicity induced mainly by oilfield completion and production processes. Since its inception, microseismic monitoring has proved to be an invaluable tool for understanding underground processes and monitoring subsurface changes associated with hydraulic fracturing, steam stimulation, geothermal energy production, underground deep mines, and CO2 storage and sequestration. Different existing and emerging new techniques are progressively being employed by the microseismic monitoring industry to provide an even more detailed and comprehensive analysis of the available data. This thesis focuses on potential applications of seismic interferometry in microseismic monitoring, a rather new method which has shown extensive applications in exploration geophysics and global seismology. Seismic interferometry mainly refers to a technique used for recovering the Green's function between two receivers by crosscorrelating their passive seismic noise recordings, thereby emphasizing the coherent part of noise which is deeply buried under local seemingly incoherent noise. We have used this property to obtain body waves propagating along borehole geophones deployed in downhole microseismic experiments, and therefore, obtain the associated seismic velocities at the neighboring formations surrounding the wellbore at the intervals between the geophons. Whether or not the coherent body waves appear clearly on the crosscorrelation functions depends on the instrument self-noise and clamping quality of borehole geophones. By obscuring the coherent noise of interest, instrument self-noise levels that are comparable with or above background noise levels can challenge seismic interferometry which aims at analysis of coherent features in ambient noise wavefelds to reveal subsurface structure. Such high levels of instrument self-noise can also act as a major constraint for the detection of weak microseismic events, in particular for borehole deployments in quiet environments such as below 1.5-2 km depths. Estimates of the instrument self-noise are commonly approximated by power spectral densities at the quiet times. The power spectral densities can also themselves be used as a tool for microseismic event detection as such events typically represent stronger spectral content over a frequency band than that of the background noise. This technique outperforms the common event detection method of short-time average/long-time average by detecting a higher number of weak events while keeping the number of false alarms at a reasonable level. It also has the benefit of providing suitable bandpass filters for better picking and further analysis of the events. On the other hand, the characteristics of the retrieved crosscorrelation waveforms can give insights about the coupling quality of the geophones to the wellbore wall as better coupled arrays result in body waves reconstructed up to a higher frequency range when compared with…

Subjects/Keywords: Seismic interferometry; Microseismic monitoring; Instrument self-noise; Coda wave interferometry; Passive image interferometry; Microseismic event detection; Geophone clamping quality

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

APA (6^th Edition):

Vaezi, Y. (2016). Applications of Seismic Interferometry in Microseismic Monitoring. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/cb2773v954

Chicago Manual of Style (16^th Edition):

Vaezi, Yoones. “Applications of Seismic Interferometry in Microseismic Monitoring.” 2016. Doctoral Dissertation, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/cb2773v954.

MLA Handbook (7^th Edition):

Vaezi, Yoones. “Applications of Seismic Interferometry in Microseismic Monitoring.” 2016. Web. 19 Jan 2021.

Vancouver:

Vaezi Y. Applications of Seismic Interferometry in Microseismic Monitoring. [Internet] [Doctoral dissertation]. University of Alberta; 2016. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/cb2773v954.

Council of Science Editors:

Vaezi Y. Applications of Seismic Interferometry in Microseismic Monitoring. [Doctoral Dissertation]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/cb2773v954

23. Meyer-Nieberg, Silja. Self-adaptation in evolution strategies.

Degree: 2008, Technische Universität Dortmund

URL: http://dx.doi.org/10.17877/DE290R-12678

► In this thesis, an analysis of self-adaptative evolution strategies (ES) is provided. Evolution strategies are population-based search heuristics usually applied in continuous search spaces which… (more)

Subjects/Keywords: Evolution strategies; Self-adaptation; Noise; Dynamic systems; Optimization; 004

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APA (6^th Edition):

Meyer-Nieberg, S. (2008). Self-adaptation in evolution strategies. (Doctoral Dissertation). Technische Universität Dortmund. Retrieved from http://dx.doi.org/10.17877/DE290R-12678

Chicago Manual of Style (16^th Edition):

Meyer-Nieberg, Silja. “Self-adaptation in evolution strategies.” 2008. Doctoral Dissertation, Technische Universität Dortmund. Accessed January 19, 2021. http://dx.doi.org/10.17877/DE290R-12678.

MLA Handbook (7^th Edition):

Meyer-Nieberg, Silja. “Self-adaptation in evolution strategies.” 2008. Web. 19 Jan 2021.

Vancouver:

Meyer-Nieberg S. Self-adaptation in evolution strategies. [Internet] [Doctoral dissertation]. Technische Universität Dortmund; 2008. [cited 2021 Jan 19]. Available from: http://dx.doi.org/10.17877/DE290R-12678.

Council of Science Editors:

Meyer-Nieberg S. Self-adaptation in evolution strategies. [Doctoral Dissertation]. Technische Universität Dortmund; 2008. Available from: http://dx.doi.org/10.17877/DE290R-12678

Purdue University

24. Lee, Jang Joon. Digitally-Assisted RF IC Design Techniques for Reliable Performance.

Degree: PhD, Electrical and Computer Engineering, 2013, Purdue University

URL: https://docs.lib.purdue.edu/open_access_dissertations/120

► Semiconductor industries have competitively scaled down CMOS devices to attain benefits of low cost, high performance, and high integration density in digital integrated circuits.… (more)

Subjects/Keywords: digitally-assisted rf ic; low-noise amplifier; phase shifter; radio-frequency integrated circuit; self-calibration; Electrical and Computer Engineering

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APA (6^th Edition):

Lee, J. J. (2013). Digitally-Assisted RF IC Design Techniques for Reliable Performance. (Doctoral Dissertation). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_dissertations/120

Chicago Manual of Style (16^th Edition):

Lee, Jang Joon. “Digitally-Assisted RF IC Design Techniques for Reliable Performance.” 2013. Doctoral Dissertation, Purdue University. Accessed January 19, 2021. https://docs.lib.purdue.edu/open_access_dissertations/120.

MLA Handbook (7^th Edition):

Lee, Jang Joon. “Digitally-Assisted RF IC Design Techniques for Reliable Performance.” 2013. Web. 19 Jan 2021.

Vancouver:

Lee JJ. Digitally-Assisted RF IC Design Techniques for Reliable Performance. [Internet] [Doctoral dissertation]. Purdue University; 2013. [cited 2021 Jan 19]. Available from: https://docs.lib.purdue.edu/open_access_dissertations/120.

Council of Science Editors:

Lee JJ. Digitally-Assisted RF IC Design Techniques for Reliable Performance. [Doctoral Dissertation]. Purdue University; 2013. Available from: https://docs.lib.purdue.edu/open_access_dissertations/120

Georgia Tech

25. Beck, Benjamin Stewart. Negative capacitance shunting of piezoelectric patches for vibration control of continuous systems.

Degree: PhD, Mechanical Engineering, 2012, Georgia Tech

URL: http://hdl.handle.net/1853/45850

► The ability to reduce flexural vibrations of lightweight structures has been a goal for many researchers. A type of transducer-controller system that accomplishes this is… (more)

▼ The ability to reduce flexural vibrations of lightweight structures has been a goal for many researchers. A type of transducer-controller system that accomplishes this is a piezoelectric patch connected to an electrical impedance, or shunt. The piezoelectric patch converts the vibrational strain energy of the structure to which it is bonded into electrical energy. This converted electrical energy is then modified by the shunt to influence to mechanical response. There are many types of shunt circuits which have demonstrated effective control of flexural systems. Of interest in this work is the negative capacitance shunt, which has been shown to produce significant reduction in vibration over a broad frequency range. A negative capacitance circuit produces a current that is 180̊ out of phase from a traditional, passive capacitor. In other words, the voltage of the capacitor decreases as charge is added. The negative capacitance shunt consists of a resistor and an active negative capacitance element. By adding a resistor and negative capacitor to the electrical domain, the shunt acts as a damper and negative spring in the mechanical domain. The performance of the negative capacitance shunt can be increased through proper selection of the shunt's electrical components. Three aspects of component selection are investigated: shunt efficiency, maximum suppression, and stability. First, through electrical modeling of the shunt-patch system, the components can be chosen to increase the efficiency of the shunt for a given impedance. Second, a method is developed that could be utilized to adaptively tune the magnitude of resistance and negative capacitance for maximum control at a given frequency. Third, with regard to stability, as the control gain of the circuit is increased, by adjusting the circuit parameters, there is a point when the shunt will become unstable. A method to predict the stability of the shunt is developed to aid in suppression prediction. The negative capacitance shunt is also combined with a periodic piezoelectric patch array to modify the propagating wave behavior of a vibrating structure. A finite element method is utilized to create models to predict both the propagation constant, which characterizes the reduction in propagating waves, and the velocity frequency response of a full system. Analytical predictions are verified with experimental results for both a 1- and 2-D periodic array. Results show significant attenuation can be achieved with a negative capacitance shunt applied to a piezoelectric patch array. Three electromechanical aspects are developed: design for maximum suppression, more accurate stability prediction, and increased power-output efficiency. First, a method is developed that may be used to adaptively tune the magnitude of resistance and negative capacitance for maximum suppression. Second, with regard to stability, a method is developed to predict the circuit components at which the circuit will obtain a stable output. Third, through electrical modeling of the shunt-patch… Advisors/Committee Members: Cunefare, Kenneth A. (Committee Chair), Ahuja, Krish K. (Committee Member), Collet, Manuel (Committee Member), Erturk, Apler (Committee Member), Ruzzene, Massimu (Committee Member).

Subjects/Keywords: Feedback control; Shunt control; Self sensing; Noise reduction; Active control; Piezoelectric transducers; Piezoelectric devices; Damping (Mechanics); Vibration

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APA (6^th Edition):

Beck, B. S. (2012). Negative capacitance shunting of piezoelectric patches for vibration control of continuous systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/45850

Chicago Manual of Style (16^th Edition):

Beck, Benjamin Stewart. “Negative capacitance shunting of piezoelectric patches for vibration control of continuous systems.” 2012. Doctoral Dissertation, Georgia Tech. Accessed January 19, 2021. http://hdl.handle.net/1853/45850.

MLA Handbook (7^th Edition):

Beck, Benjamin Stewart. “Negative capacitance shunting of piezoelectric patches for vibration control of continuous systems.” 2012. Web. 19 Jan 2021.

Vancouver:

Beck BS. Negative capacitance shunting of piezoelectric patches for vibration control of continuous systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2012. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1853/45850.

Council of Science Editors:

Beck BS. Negative capacitance shunting of piezoelectric patches for vibration control of continuous systems. [Doctoral Dissertation]. Georgia Tech; 2012. Available from: http://hdl.handle.net/1853/45850

26. Faust, Logan Grace. The test-retest reliability of binaural-processing tasks at home versus a clinical environment.

Degree: 2019, James Madison University

URL: https://commons.lib.jmu.edu/diss201019/211

► Objective: Investigate the reliability of a custom-designed, portable, stereo-hearing testing system (as in the Ganev, 2017, Au.D. dissertation) when subjects self-administer two different stereo-hearing tasks… (more)

▼ Objective: Investigate the reliability of a custom-designed, portable, stereo-hearing testing system (as in the Ganev, 2017, Au.D. dissertation) when subjects self-administer two different stereo-hearing tasks at home. Results obtained under known and supervised conditions at a university clinic or lab versus unknown conditions at the participants’ homes were compared. Intra-subject comparison, and inter-subject trends, discerned the reliability of patient setup and self-administration of the two tasks. Design: Ten subjects were evenly split among two conditions: five subjects each setup and self-administered the tasks first at home and then received direction in the clinic, and five received direction and did the tasks in the clinic first. In each condition, there were two stereo-hearing tasks. The first task was a localization assessment: participants attempted to identify the location of multiple short noise bursts from one of eight speakers in a horizontal array (random presentation). The second task was a speech-in-noise assessment: participants identified the color/number specification as presented by a speaker while a simultaneous, adaptive, noise presentation occurred. The speech-in-noise task repeated in four different fixed, locational configurations with at least 10 trials each. Results: Testing at home was as good as testing in the clinic. Averaged localization errors were only 0.4 degrees (1/50th of the distance between test speakers) worse at home than in the clinic, and this difference was not significant (p>0.8). There was no difference in speech-in-noise thresholds at home versus clinic. There was no significant learning effect in either task; that is, no consistent difference between the first and second test. There was a significant location-by-order interaction in the localization test (p=0.04; with small effect size); participants who completed the task at home first performed better than those in the clinic. Conclusion: Patients can reliably setup and self-administer the deployable stereo-hearing test system with no decrement in performance compared to those receiving supervised testing in a controlled environment. This validates the Ganev, 2017, dissertation and enables future use of this system to test stereo-hearing within patients’ homes. The marginally significance location-by-order interaction might indicate that being forced to learn first on your own is more effective. Advisors/Committee Members: Lincoln C. Gray, Bradley W. Kesse, Christopher G. Clinard.

Subjects/Keywords: Aural atresia; localization; speech-in-noise; telehealth; binaural processing; self-administered test; Speech and Hearing Science; Speech Pathology and Audiology

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APA (6^th Edition):

Faust, L. G. (2019). The test-retest reliability of binaural-processing tasks at home versus a clinical environment. (Doctoral Dissertation). James Madison University. Retrieved from https://commons.lib.jmu.edu/diss201019/211

Chicago Manual of Style (16^th Edition):

Faust, Logan Grace. “The test-retest reliability of binaural-processing tasks at home versus a clinical environment.” 2019. Doctoral Dissertation, James Madison University. Accessed January 19, 2021. https://commons.lib.jmu.edu/diss201019/211.

MLA Handbook (7^th Edition):

Faust, Logan Grace. “The test-retest reliability of binaural-processing tasks at home versus a clinical environment.” 2019. Web. 19 Jan 2021.

Vancouver:

Faust LG. The test-retest reliability of binaural-processing tasks at home versus a clinical environment. [Internet] [Doctoral dissertation]. James Madison University; 2019. [cited 2021 Jan 19]. Available from: https://commons.lib.jmu.edu/diss201019/211.

Council of Science Editors:

Faust LG. The test-retest reliability of binaural-processing tasks at home versus a clinical environment. [Doctoral Dissertation]. James Madison University; 2019. Available from: https://commons.lib.jmu.edu/diss201019/211

University of Cincinnati

27. Castillo Guevara, Ramon D. Coordination of Local and Global Features: Fractal Patterns in a Categorization Task.

Degree: MA, Arts and Sciences: Psychology, 2011, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321372828

► To categorize an object successfully, one needs to attend to both local and global aspects to group it meaningfully. The open question pertains to how… (more)

▼ To categorize an object successfully, one needs to attend to both local and global aspects to group it meaningfully. The open question pertains to how the mind coordinates local and global features of a display. Coordination of mental processes can be studied by looking at correlational patterns across many thousands of trials. The coordination among these time scales can be described according to a mathematical constructs called fractals. Even though fractals have been detected in trial series pertaining to motor and cognitive tasks, they have not been evaluated in categorization tasks in which are required attention to local and global features. The goal of this research was to fill this gap.Two experiments were implemented on undergraduate students in order to obtain a measure of the coordination of local and global aspects during a categorization task. Participants had to decide if two stimuli had the same contour around a string of elements, and if they shared an element. The assumption was that such competition might maximize the degree to which global and local attributes need to be coordinated. Therefore, this coordination might be characterized by fractal exponents, which in turn might be susceptible to constraints in task and participants.Experiment 1 (n = 32) tested the effect of two of those task constraints; the first being the predictability of the response of a trial from the answer of the previous trial. Depending on condition, trials were presented either in random order or in a predetermined sequence that allowed participants to anticipate the next trial. The idea was that predictability might increase the fractal exponent, while added randomness decreases the fractal exponent. Another factor manipulated pertained to the participants‘ skill. Here, it was assumed that a greater familiarity was associated with a greater skill in identifying the stimuli; and that fractal exponents close to 1/f pink noise must appear more clearly with familiar stimuli than novel stimuli.Experiment 2 (n = 64), was based on a new version of the categorization task. Here, the structure was modified to decrease the competition for attentional resources. In some conditions, participants were asked to make decisions by focusing their attention on elements, while in other conditions they were asked to focus on the global shapes. Thus, it was hypothesized that the fractal exponents obtained in the second experiment should be higher than those obtained in the first experiment.Reaction times were compared between familiarity of stimuli, the predictability of the next trial, and among types of slides. Also they were submitted to Spectral Analyzes to detect fractal organization.The results show that the predictability of the next trial was the most important factor. When trials were administered sequentially, exponents were higher than those obtained with random procedure. Additionally, when decision was centered on global aspects, exponents were higher when decision was centered on local elements and centered on both aspects.… Advisors/Committee Members: Kloos, Adelheid (Committee Chair).

Subjects/Keywords: Cognitive Therapy; Categorization-Coordination; Perception-Attention; Fractal Analysis; 1/f noise; Self-Organized Criticality; Spectral Analysis

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APA (6^th Edition):

Castillo Guevara, R. D. (2011). Coordination of Local and Global Features: Fractal Patterns in a Categorization Task. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321372828

Chicago Manual of Style (16^th Edition):

Castillo Guevara, Ramon D. “Coordination of Local and Global Features: Fractal Patterns in a Categorization Task.” 2011. Masters Thesis, University of Cincinnati. Accessed January 19, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321372828.

MLA Handbook (7^th Edition):

Castillo Guevara, Ramon D. “Coordination of Local and Global Features: Fractal Patterns in a Categorization Task.” 2011. Web. 19 Jan 2021.

Vancouver:

Castillo Guevara RD. Coordination of Local and Global Features: Fractal Patterns in a Categorization Task. [Internet] [Masters thesis]. University of Cincinnati; 2011. [cited 2021 Jan 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321372828.

Council of Science Editors:

Castillo Guevara RD. Coordination of Local and Global Features: Fractal Patterns in a Categorization Task. [Masters Thesis]. University of Cincinnati; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321372828

University of Pretoria

28. [No author]. Design and performance evaluation of a full rate, full diversity space-time-spreading code for an arbitrary number of Tx antennas .

Degree: 2008, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-09182008-164047/

► Since the mid 1990’s, the wireless communications industry has witnessed explosive growth. The worldwide cellular and personal communication subscriber base surpassed 600 million users by… (more)

▼ Since the mid 1990’s, the wireless communications industry has witnessed explosive growth. The worldwide cellular and personal communication subscriber base surpassed 600 million users by late 2001, and the number of individual subscribers surpassed 2 billion at the end of 2006 [1, 2]. In order to attract and accommodate these subscribers, modern communication systems, like the Third Generation (3G) and Fourth Generation (4G) cellular networks, will have to provide attractive new features such as increased data throughput rates, greater system capacity, and better speech quality. These modern communication systems promise to have advantages such as wireless access in ways that have never been possible before, providing, amongst others services such as live television (TV) broadcasting to Mobile Stations (MS)s, multi-megabit Internet access, communication using Voice over Internet Protocol (VoIP), unparalleled network capacity, seamless accessibility and many more. With specific, but not exclusive reference to the cellular environment, there are numerous ways to increase the data throughput rate and system capacity. From an economical perspective, it would be more efficient to add equipment to the Base Station (BS) rather than the MSs. To achieve these improvements the motivation to utilise transmit diversity’s capabilities have been identified as a key research issue in this study. Alamouti [3] proposed a transmit diversity technique using two transmit antennas and one receive antenna, providing the same diversity order than using one transmit antenna and two receive antennas. Since Alamouti’s publication in 1998, many papers in the field of Space-Time (ST) coding have been published. Current research in the field of ST coding consists of finding methods to extend the number of transmit antennas to more than four, while still achieving full rate, as well as full diversity which is the main motivation for this study. This study proposes a novel idea of breaching the limitations with ST coding theory by combining ST coding with Spread Spectrum (SS) modulation techniques in order to extend the number of transmit antennas to more than four and still achieve full rate as well as full diversity. An advantage of the proposed scheme, called Direct Sequence Space-Time Spreading (DSSTS) has over current Space-Time Spreading (STS) techniques is that it uses 50% less spreading codes. A performance evaluation platform for the DSSTS scheme was developed to simulate the performance of the scheme in a realistic mobile communication environment. A mobile communication channel that has the ability to simulate time-varying multipath fading was developed and used to evaluate the performance of the DSSTS scheme. From the simulation results obtained, it is evident that Walsh sequences that exhibit particularly good cross-correlation characteristics, cannot overcome the effect of the antenna self-noise in order to exploit the diversity gain by adding extra antennas, i.e. diversity extension. The research also showed that an optimal… Advisors/Committee Members: Prof L P Linde (advisor).

Subjects/Keywords: Cdma; Antenna self-noise; Mui; Full rate; 4g; 3g; St block coding; Full diversity; Capacity; Transmit diversity; Sstd; Time varying multipath fading; Cross-correlation; Spread spectrum; Dssts; Quasi-static; UCTD

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APA (6^th Edition):

author], [. (2008). Design and performance evaluation of a full rate, full diversity space-time-spreading code for an arbitrary number of Tx antennas . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-09182008-164047/

Chicago Manual of Style (16^th Edition):

author], [No. “Design and performance evaluation of a full rate, full diversity space-time-spreading code for an arbitrary number of Tx antennas .” 2008. Masters Thesis, University of Pretoria. Accessed January 19, 2021. http://upetd.up.ac.za/thesis/available/etd-09182008-164047/.

MLA Handbook (7^th Edition):

author], [No. “Design and performance evaluation of a full rate, full diversity space-time-spreading code for an arbitrary number of Tx antennas .” 2008. Web. 19 Jan 2021.

Vancouver:

author] [. Design and performance evaluation of a full rate, full diversity space-time-spreading code for an arbitrary number of Tx antennas . [Internet] [Masters thesis]. University of Pretoria; 2008. [cited 2021 Jan 19]. Available from: http://upetd.up.ac.za/thesis/available/etd-09182008-164047/.

Council of Science Editors:

author] [. Design and performance evaluation of a full rate, full diversity space-time-spreading code for an arbitrary number of Tx antennas . [Masters Thesis]. University of Pretoria; 2008. Available from: http://upetd.up.ac.za/thesis/available/etd-09182008-164047/

Texas A&M University

29. Sarvepalli, Pradeep Kiran. Non-data aided digital feedforward timing estimators for linear and nonlinear modulations.

Degree: MS, Electrical Engineering, 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/360

► We propose to develop new non-data aided (NDA) digital feedforward symbol timing estimators for linear and nonlinear modulations, with a view to reducing the sampling… (more)

Subjects/Keywords: timing recovery; feedforward; NDA; symbol-rate; cyclostationary; self-noise; prefilter

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APA (6^th Edition):

Sarvepalli, P. K. (2004). Non-data aided digital feedforward timing estimators for linear and nonlinear modulations. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/360

Chicago Manual of Style (16^th Edition):

Sarvepalli, Pradeep Kiran. “Non-data aided digital feedforward timing estimators for linear and nonlinear modulations.” 2004. Masters Thesis, Texas A&M University. Accessed January 19, 2021. http://hdl.handle.net/1969.1/360.

MLA Handbook (7^th Edition):

Sarvepalli, Pradeep Kiran. “Non-data aided digital feedforward timing estimators for linear and nonlinear modulations.” 2004. Web. 19 Jan 2021.

Vancouver:

Sarvepalli PK. Non-data aided digital feedforward timing estimators for linear and nonlinear modulations. [Internet] [Masters thesis]. Texas A&M University; 2004. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1969.1/360.

Council of Science Editors:

Sarvepalli PK. Non-data aided digital feedforward timing estimators for linear and nonlinear modulations. [Masters Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/360

McMaster University

30. Arthurs, David. Self-Excited Oscillations of the Impinging Planar Jet.

Degree: PhD, 2012, McMaster University

URL: http://hdl.handle.net/11375/12498

►

This thesis experimentally investigates the geometry of a high-speed subsonic planar jet impinging orthogonally on a large, rigid plate at some distance downstream. This… (more)

▼

This thesis experimentally investigates the geometry of a high-speed subsonic planar jet impinging orthogonally on a large, rigid plate at some distance downstream. This geometry has been found to be liable to the production of intense narrowband acoustic tones produced by self-excited flow oscillations for a range of impingement ratio, Mach number and nozzle thickness. Self-excited flows and acoustic tones were found to be generated in two distinct flow regimes: a linear regime occurring at relatively low Mach number, and a fluid-resonant regime occurring at higher Mach numbers. The linear regime has been found to generate acoustic tones exhibiting relatively low pressure amplitudes with frequencies which scale approximately linearly with increasing Mach number, and is produced by a traditional feedback mechanism, whereas tones within the fluid-resonant regime are produced by coupling between the unstable hydrodynamic modes of the jet and trapped acoustic modes occurring between the nozzle and the plate, and produce tones at significantly larger amplitudes. Coupling with these trapped acoustic modes was found to dominate the self-excited response of the system in the fluid-resonant regime, with the frequencies of these acoustic modes determining the unstable mode of the jet being excited, and with the impingement ratio of the flow having only minor effects related to the convection speed. Phase-locked PIV measurements have revealed that self-excited flow oscillations in the fluid-resonant regime are produced by a series of five anti-symmetric modes of the jet, along with a single symmetric mode occurring for small impingement ratios. The behavior of large coherent flow structures forming in the flow has been investigated and quantified, and this information has been used to develop a new feedback model, which can be used to accurately predict the self-excited flow oscillation of the jet.

Doctor of Philosophy (PhD)

Advisors/Committee Members: Ziada, Samir, Mechanical Engineering.

Subjects/Keywords: Jet Noise; Acoustic Tone; Impinging Jet; Coherent Structure; Feedback Model; Self-Excited Flow; Acoustics, Dynamics, and Controls; Aerodynamics and Fluid Mechanics; Acoustics, Dynamics, and Controls

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APA (6^th Edition):

Arthurs, D. (2012). Self-Excited Oscillations of the Impinging Planar Jet. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/12498

Chicago Manual of Style (16^th Edition):

Arthurs, David. “Self-Excited Oscillations of the Impinging Planar Jet.” 2012. Doctoral Dissertation, McMaster University. Accessed January 19, 2021. http://hdl.handle.net/11375/12498.

MLA Handbook (7^th Edition):

Arthurs, David. “Self-Excited Oscillations of the Impinging Planar Jet.” 2012. Web. 19 Jan 2021.

Vancouver:

Arthurs D. Self-Excited Oscillations of the Impinging Planar Jet. [Internet] [Doctoral dissertation]. McMaster University; 2012. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11375/12498.

Council of Science Editors:

Arthurs D. Self-Excited Oscillations of the Impinging Planar Jet. [Doctoral Dissertation]. McMaster University; 2012. Available from: http://hdl.handle.net/11375/12498

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Open Access Theses and Dissertations