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BENEFITS AND TECHNIQUES FOR INCREASED POWER EFFICIENCY IN MODERN TELEMETRY TRANSMITTERSBozarth, Don, Horcher, Greg 10 1900 (has links)
ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / With recent developments in telemetry transmitter technologies, significantly greater DC to RF
power efficiencies can be achieved. These new high efficiency transmitter designs may impact
overall system design trade-offs by reducing the system size and weight requirements for
batteries, heat sinks, and cabling. Furthermore, these fully DC isolated, next generation ARTM
Tier 0, I and II enabled devices offer unique options to the platform designer in EMI/EMC
control and system design. Advanced manufacturing techniques coupled with adaptive
microprocessor control promises enhanced functionality, improved performance and reduced
unit costs.
The paper presents the performance of a new, high efficiency, telemetry transmitter topology and
the possible system benefits involved with the application of this advanced transmitter
technology within modern and legacy telemetry platforms. Specific sub-assembly circuit design
techniques will be discussed and compared with prior design approaches.
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Energy use, built form and housing layout in the United Kingdom : a comparative studyBurke, Andrew John January 1992 (has links)
No description available.
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Develop an Energy Efficient Campus Building that Outperforms the Existing Structure Using Energy Modeling/Optimization SoftwareBarnawi, Khader Z., Barnawi, Khader Z. January 2016 (has links)
This study is going to investigate the energy performance of a temporary building on campus and analyze it thoroughly to identify the trends on energy consumption. Then, it is going to select the best strategy that can improve its performance in this region. Next, a prototype design of a high energy performance building is going to be proposed to the university authorities to be constructed in the permanent campus in the second phase and, identify a list of the best strategies that are more appropriate for the climate of the city. Finely, a comparative study is going to be conducted by using energy analyses software (eQUEST) to find out the annual saving of the proposed design over the existing building.
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From laissez-faire to laissez-faire : revisiting the notion of efficiency in globalising management praxisCallender, Guy Charles, University of Western Sydney, College of Science, Technology and Environment, School of Engineering January 2004 (has links)
The findings of this research confirm that the notion of descriptive efficiency has been developed as a populist concept in managerial discourse and is typically interpreted in simplistic, normative terms and thus has limited technical meaning in management praxis. Furthermore, the concept has been captured by uncritical, yet plausible, management commentators who have seemingly assumed that management efficiency will emerge from the adoption of their various prescriptions. The research will contribute to the general management literature through a cross-disciplinary critique and a re-interpretation of the notion of efficiency in management praxis. At a macro-level, the research advances the proposition that the notion of efficiency has become an ideological statement of support for any management intention, rather than a practical means to inform a range of management actions. A grounded theory of descriptive efficiency is proposed in order to explain the apparently unconscious application of laissez-faire and more contemporary principles of economics to management praxis and the wider management discipline without the support of a substantive elaboration of contemporary efficiency. / Doctor of Philosophy (PhD)
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An investigation of methods for reducing the use of non-renewable energy resources for housing in ThailandRasisuttha, Sakkara 29 August 2005 (has links)
The purpose of this research is to develop methods that reduce energy consumption in a
residential building in a hot and humid climate region (Thailand) using efficient architectural
building components and renewable energy (solar energy) to produce electricity, domestic hot
water, and supplemental cooling by night sky radiation.
Improving the architectural building components, including building materials, is an option
to reduce energy consumption in a building. Using renewable energy sources is another option to
reduce the consumption of non-renewable energy. In residential buildings, solar energy has been
utilized for space heating and domestic hot water using active solar collector systems and for
generating electricity using photovoltaic (PV) systems. One photovoltaic system, the hybrid
photovoltaic-thermal (PV-T) collector system, has been developed by several researchers over the
last 20 years. The hybrid photovoltaic-thermal (PV-T) collector system is a combination
photovoltaic (for producing electricity) and solar thermal collector (for producing hot water).
Theoretical and experimental studies of this collector have highlighted the advantages of the hybrid
PV-T collector system over separate systems of PV and solar collector in term of system efficiency
and economics. Unfortunately, very little experimental data exists that demonstrates the
advantages of a combined system. Therefore, one of the objectives of this study conducted was an
experimental study of this system as an auxiliary energy source for a residential building.
Night sky radiation has also been studied as a cooling strategy. However, no attempt so far
could be found to integrate it to a hybrid PV-T collector system. The night sky radiation strategy
could be operated with the hybrid PV/T collector system by using existing resources that are
already present in the solar system. The integration of the night sky radiation into the hybrid PV-T
collector system should yield more productivity of the system than the operation of the Hybrid PVT
system alone.
The research methods used in this work included instrumentation of a case-study house in
Thailand, an experimental PV-T collector system, and a calibrated building thermal simulation. A
typical contemporary Thai residential building was selected as a case-study house. Its energy use
and local weather data were measured and analyzed. Published energy use of Thai residential
buildings was also analyzed as well to determine average energy consumption. A calibrated
computer model of the case-study building was constructed using the DOE-2 program. A field
experiment of the thermal PV system was constructed to test its ability to simultaneously produce
electricity and hot water in the daytime, and shed heat at night as a cooling strategy (i.e., night sky
radiation). The resultant electricity and hot water produced by the hybrid PV-T collector system
helped to reduce the use of non-renewable energy. The cooling produced by the night sky radiation
also has to potential to reduce the cooling load. The evaluation of the case-study house and results
of the field experiment helped to quantify the potential reduction of energy use in Thai residential
buildings.
This research provided the following benefits: 1) experimental results of a hybrid PV-T
solar collector system that demonstrates its performance compared to typical system of separate
photovoltaic and solar collector, 2) results of night sky radiation experiments using a photovoltaic
panel as a radiator to demonstrate the performance of this new space cooling strategy, and 3) useful
data from the case-study house simulation results and guidelines to assist others in transferring the
results to other projects.
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L'impact de l'annonce de bénéfices sur le marché financier françaisAtron, Ehui Evariste Simon Grandin, Pascal. January 2005 (has links) (PDF)
Thèse de doctorat : Sciences de gestion : Paris 12 : 2005. / Titre provenant de l'écran titre.
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Two essays on stock marketsDong, Wei, 董炜 January 2013 (has links)
This thesis contains two pieces of empirical study on market efficiency. The first essay tests the semi-strong form of market efficiency in the U.S. We use sell-side analyst target prices as publically available information and test the performance of a mean-variance optimized portfolio which is based on the Treynor and Black model. We focus on constituents of S&P 500 index as our sample universe. During the period of beck-testing from 2004 to 2010, we find that the dynamically rebalanced portfolio beats the market in 6 out of 7 years and that the strategy generates significant risk-adjusted abnormal returns.
In the second essay we study the post-earnings-announcement drift (PEAD) phenomenon, a well-documented market anomaly, on the French stock market. Our empirical study devises a difference-in-difference policy experiment to test if trading activities by individual investors contribute to the magnitude of PEAD. We exploit a recent policy reform on the French stock market, which significantly increased speculative trading costs of individual investors and reduced their trading activities. The impact of reform is found twice as large on individual contrarian traders than momentum traders. Using a group of unaffected stocks to control for potential non-experimental factors, we find magnitude of PEAD dropped significantly after the reform in the experimented group but not in the experimented group but not in the control group. / published_or_final_version / Economics and Finance / Doctoral / Doctor of Philosophy
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Modelling and co-ordinated control of power plantRice, Enda Padraig January 1998 (has links)
No description available.
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Profitability of butterfly trades in bond marketsPal, Satyajit, Banking & Finance, Australian School of Business, UNSW January 2007 (has links)
The Efficient Market Hypothesis (EMH) has had significant impact on the theory and practice of investments. However technical trading rules have continued to be used by practioners and have been the focus of many academic studies which have focused on equity, foreign exchange and futures markets. The scarcity of research into technical trading models for fixed income markets is astonishing considering the significant size and consequent investor importance of fixed income markets relative to other financial markets and the extensive application of technical trading models by market participants. This is one of the few studies that develops a technical trading model applicable to fixed income markets. Black (1986) defined Efficient Markets as a market where deviations from fundamental values were short lived and small in magnitude. Fundamental asset values are hard to calculate, but we are able to identify fundamental values for a set of Government Bonds on the principle that yield relativities between such bonds are quite stable except for 'deliberate' changes in trading behaviour. We find that the deviations from fundamental value are short lived and small in magnitude. We exploit deviations from fundamental value by Butterfly Trading strategies; Normal Butterfly trades earning returns from movements in yield curve slope and curvature and Arbitrage Butterfly trades earning returns from yield curve curvature only. After considering transaction costs, we achieve annualised returns of 120bps from our Normal Butterfly trades and 72 bps from our Arbitrage Butterfly trades. Consistent with the risk-return relationship for financial instruments, we find that the returns and the volatility of returns for Normal Butterfly trades are higher than the returns and volatility of returns for Arbitrage Butterfly trades. Normal Butterfly trades are exposed to yield curve slope changes whereas Arbitrage Butterfly trades are not, resulting in higher risk and higher returns for Normal Butterfly trades. This finding is consistent with the results obtained by Fabozzi, Martellini and Priaulet (2005).
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Market efficiency test in the VIX futures marketZhang, Jian. January 2008 (has links)
Thesis (M.S.)--University of Wyoming, 2008. / Title from PDF title page (viewed on Apr. 1, 2010). Includes bibliographical references (p. 40-41).
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