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Rozprawy doktorskie na temat „Low latitude current systems”

Autor: Grafiati

Data publikacji: 6 września 2023

Data aktualizacji: 31 lipca 2025

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1

Vichare, Geeta. "Theoretical modelling of low latitude current system." Thesis, Indian Institute of Geomagnetism, Mumbai, 2001. http://localhost:8080/xmlui/handle/123456789/210.

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Sridharan, S. "Investigation of middle atmospheric winds, waves and tides from low latitudes." Thesis, IIG, 2002. http://localhost:8080/xmlui/handle/123456789/1604.

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A Thesis submitted to the Moanonmaniam Sundaranar University, Tirunelveli, in partial fulfilment of the requirements for the Ph.D. degree under the guidance of Dr. S. Gurubaran, Equatorial Geophysical Research Laboratory, Tirunelveli and Dr. N. Arunachalam, M.S. University, Tirunelveli

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Tsunomura, Satoru. "On the Contribution of Global Scale Polar-originating Ionospheric Current Systems to Geomagnetic Disturbances in Middle and Low Latitudes." 京都大学 (Kyoto University), 1999. http://hdl.handle.net/2433/182006.

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Gammon, Tammy Lea. "Improved arcing-fault current models for low-voltage power systems (<1kV)." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15675.

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Yokoyama, Yoshihiro. "Characteristics of the mesoscale field-aligned currents in the dusk sector of the auroral oval based on data from the Swarm satellites." Kyoto University, 2021. http://hdl.handle.net/2433/261602.

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Arbetter, Barry Steven. "DC-DC converter utilizing hysteretic current-mode control for low-voltage microprocessor systems with power management." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3219222.

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Miwa, Hidekazu. "High-Efficiency Low-Voltage High-Current Power Stage Design Considerations for Fuel Cell Power Conditioning Systems." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/42519.

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Fuel cells typically produce low-voltage high-current output because their individual cell voltage is low, and it is nontrivial to balance for a high-voltage stack. In addition, the output voltage of fuel cells varies depending on load conditions. Due to the variable low voltage output, the energy produced by fuel cells typically requires power conditioning systems to transform the unregulated source energy into more useful energy format. When evaluating power conditioning systems, efficiency and reliability are critical. The power conditioning systems should be efficient in order to prevent e

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Ziegler, Silvio. "New current sensing solutions for low-cost high-power-density digitally controlled power converters." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0077.

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[Truncated abstract] This thesis studies current sensing techniques that are designed to meet the requirements for the next generation of power converters. Power converters are often standardised, so that they can be replaced with a model from another manufacturer without an expensive system redesign. For this reason, the power converter market is highly competitive and relies on cutting-edge technology, which increases power conversion efficiency and power density. High power density and conversion efficiency reduce the system cost, and thus make the power converter more attractive to the cus

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Mendoza, Arenas Juan José. "Spin and energy transport in boundary-driven low-dimensional open quantum systems." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:44b89c4d-e9eb-4136-a540-c80bcabeb6f6.

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In spite of being the subject of intense research, several key but complex questions on the nonequilibrium physics of correlated quantum systems remain controversial. For example, the nature of particle and energy transport in different interacting regimes, the relevance of integrability and the impact of environmental coupling are still under active debate. These problems can now be approached numerically, due to the development of powerful algorithms which allow the efficient simulation of the dynamics of correlated systems. In the present thesis we study numerically and analytically the tra

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MOSCA, CARMELO. "Methodologies for Frequency Stability Assessment in Low Inertia Power Systems." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2895393.

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Heim, Marcus Edwin Allan. "ANALYSIS OF MOS CURRENT MODE LOGIC (MCML) AND IMPLEMENTATION OF MCML STANDARD CELL LIBRARY FOR LOW-NOISE DIGITAL CIRCUIT DESIGN." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1422.

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MOS current mode logic (MCML) offers low noise digital circuits that reduce noise that can cripple analog components in mixed-signal integrated circuits, when compared to CMOS digital circuits. An MCML standard cell library was developed for the Cadence Virtuoso Integrated Circuit (IC) design software that gives IC designers the ability to design complex, low noise digital circuits for use in mixed-signal and noise sensitive systems at a high level of abstraction, allowing them to get superior products to market faster than competitors. The MCML standard cell library developed and presented he

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Geury, Thomas. "Smart matrix converter-based grid-connected photovoltaic system for mitigating current and voltage-related power quality issues on the low-voltage grid." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/243967.

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The increasing penetration of distributed energy resources, in particular Photovoltaic (PV) production units, and the ever-growing use of power electronics-based equipment has led to specific concern about Power Quality (PQ) in the Low-Voltage (LV) grid. These include high- and low-order current harmonics as well as voltage distortion at the point of common coupling. Solutions to overcome these issues, meeting international grid codes, are being proposed in the context of smart energy management schemes.This work proposes a novel three-phase topology for a PV system with enhanced PQ mitigation

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Park, Jinsung. "A highly linear and low flicker-noise CMOS direct conversion receiver front-end for multiband applications." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-07092007-054701/.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Dr. Chang-Ho Lee, Committee Member ; Dr . Kevin T Kornegay, Committee Member ; Dr. Emmanouil M Tentzeris, Committee Member ; Dr. Joy Laskar, Committee Chair ; Dr. Oliver Brand, Committee Member.

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Xiong, Zhijie. "Radio Frequency Low Noise and High Q Integrated Filters in Digital CMOS Processes." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5043.

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Radio Frequency Low Noise and High Q Integrated Filters in Digital CMOS Processes Zhijie Xiong 149 pages Directed by Dr. Phillip E. Allen Presented in this work is a novel design technique for CMOS integration of RF high Q integrated filters using positive feedback and current mode approach. Two circuits are designed in this work: a 100MHz low-noise and high Q bandpass filter suited for an FM radio front-end, and a 2.4GHz low-noise and high-Q bandpass filter suited for a Bluetooth front-end. Current-mode approach and positive feedback design techniques are successfully used in the design o

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Latzo, Curtis Thomas. "Approaches to Arc Flash Hazard Mitigation in 600 Volt Power Systems." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3198.

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ABSTRACT Federal regulations have recognized that arc flash hazards are a critical source of potential injury. As a consequence, in order to work on some electrical equipment, the energy source must be completely shut-down. However, power distribution systems in mission critical facilities such as hospitals and data centers must sometimes remain energized while being maintained. In recent years the Arc Flash Hazard Analysis has emerged as a power system tool that informs the qualified technician of the incident energy at the equipment to be maintained and recommends the proper protective equip

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Keskar, Neeraj. "High bandwidth wide LC-Resr compliant sigma-delta boost DC-DC switching converters." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22530.

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In low power, battery-operated, portable applications, like cell phones, PDAs, digital cameras, etc., miniaturization at a low cost is a prominent driving factor behind product development and marketing efforts. As such, power supplies in portable applications must not only conform and adapt to their highly integrated on-chip and in-package environments but also, more intrinsically, respond quickly to fast load dumps to achieve and maintain high accuracy. The frequency-compensation network, however, limits speed and regulation performance because, in catering to all combinations of the output

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Marusiak, David. "MOS CURRENT MODE LOGIC (MCML) ANALYSIS FOR QUIET DIGITAL CIRCUITRY AND CREATION OF A STANDARD CELL LIBRARY FOR REDUCING THE DEVELOPMENT TIME OF MIXED-SIGNAL CHIPS." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1363.

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Many modern digital systems use forms of CMOS logical implementation due to the straight forward design nature of CMOS logic and minimal device area since CMOS uses fewer transistors than other logic families. To achieve high-performance requirements in mixed-signal chip development and quiet, noiseless circuitry, this thesis provides an alternative toCMOSin the form of MOS Current Mode Logic (MCML). MCML dissipates constant current and does not produce noise during value changing in a circuit CMOS circuits do. CMOS logical networks switch during clock ticks and with every device switching, no

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Domagk, Max. "Identifikation und Quantifizierung korrelativer Zusammenhänge zwischen elektrischer sowie klimatischer Umgebung und Elektroenergiequalität." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-211866.

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Eine angemessene Qualität der Elektroenergie ist Grundvoraussetzung für den störungsfreien Betrieb aller angeschlossenen Geräte und Anlagen und spielt in den Verteilungsnetzen moderner Industriegesellschaften wie Deutschland eine zentrale Rolle. Die Elektroenergiequalität (EEQ) wird in Strom- und Spannungsqualität unterteilt. Während die Stromqualität maßgeblich im Verantwortungsbereich der Hersteller von Geräten und Anlagen liegt, sind für die Sicherung einer angemessenen Spannungsqualität im Wesentlichen die Netzbetreiber verantwortlich. Durch die technische Weiterentwicklung bspw. neuer Ger

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Lin, Shi-Kai, and 林詩凱. "Design of a Current-reused Low Noise Amplifier for Ultra-Wideband Systems." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/09362239086668679354.

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碩士<br>雲林科技大學<br>電子與資訊工程研究所<br>97<br>In this thesis, we design two broadband low noise amplifiers (LNAs) for ultra-wideband (UWB) communication systems, which are implemented in TSMC 0.18 μm CMOS technology. The design of the amplifiers concentrates on low power-consumption and low costs as well. The first design utilizes a current topology to save the power and the second design is used two stage cascade topology with a inter-stage network to achieve the high gain performance. In the first section, the measurement of the first LNA shows that the maximum gain is 13.2 dB, 3-dB bandwidth is

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Chang, Chih-Rong, and 張致榮. "The Design of Integrated Platform with RF for MIMO-OFDM Systems and Dynamic Current Scaling for Low-power Design." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/10743057188438431419.

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碩士<br>國立交通大學<br>資訊科學與工程研究所<br>101<br>In recent years, multiple-input multiple-output (MIMO) technology has been used widely in various communication systems. The main reason is that it can provide the efficiency and quality of data transmission. In addition, the orthogonal-frequency division multiplexing (OFDM) technology provides high-speed data transmission, as well as for operating in multipath over frequency selective fading channels, which has been adopted by many transmission systems. Therefore, the combination of these two technologies in next-generation wireless communication systems,

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21

"Development of high-performance low-dropout regulators for SoC applications." 2010. http://library.cuhk.edu.hk/record=b5894389.

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Or, Pui Ying.<br>"July 2010."<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2010.<br>Includes bibliographical references.<br>Abstracts in English and Chinese.<br>Acknowledgments<br>Table of Content<br>List of Figures<br>List of Tables<br>List of Publications<br>Chapter Chapter 1 - --- Background of LDO Research<br>Chapter 1.1 --- Structure of a LDO --- p.1-1<br>Chapter 1.2 --- Principle of Operation of LDO --- p.1-2<br>Chapter 1.3 --- Steady-State Specification of LDO --- p.1-3<br>Chapter 1.4 --- High-Frequency Specification of LDO --- p.1-3<br>Chapter 1.5 --- Dynamic Specification

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"Design of on-chip low-dropout regulators for energy-aware wireless SoC in nano-scale CMOS technologies." Thesis, 2011. http://library.cuhk.edu.hk/record=b6075191.

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Finally, the PSRR performance of LDO is studied. An energy-efficient embedded ripple feed-forward path is proposed to improve the PSRR of LDO. Comparing with some state-of-the-art techniques for PSRR improvement, the proposed LDO features very simple structure thus low-power consumption. A LDO implemented in 0.18-mum CMOS technology with 0.042-mm2 active area has been designed to verify the idea. With an external 4.7-muF output capacitor, in the maximum load condition (i.e. at 25 mA), the PSRR is -77 dB at 1 MHz, -85 dB at 2.5 MHz and -55 dB at 5 MHz, respectively. The quiescent current is 15

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Domagk, Max. "Identifikation und Quantifizierung korrelativer Zusammenhänge zwischen elektrischer sowie klimatischer Umgebung und Elektroenergiequalität." Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A29896.

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Eine angemessene Qualität der Elektroenergie ist Grundvoraussetzung für den störungsfreien Betrieb aller angeschlossenen Geräte und Anlagen und spielt in den Verteilungsnetzen moderner Industriegesellschaften wie Deutschland eine zentrale Rolle. Die Elektroenergiequalität (EEQ) wird in Strom- und Spannungsqualität unterteilt. Während die Stromqualität maßgeblich im Verantwortungsbereich der Hersteller von Geräten und Anlagen liegt, sind für die Sicherung einer angemessenen Spannungsqualität im Wesentlichen die Netzbetreiber verantwortlich. Durch die technische Weiterentwicklung bspw. neuer G

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