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Articles 1 - 15 of 15
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Potential Energy Savings When Using Saline Water For Cooling Chillers In Malta, Mireille Micallef
Potential Energy Savings When Using Saline Water For Cooling Chillers In Malta, Mireille Micallef
Masters Theses, 2010-2019
Several cooling systems found in facilities on the coast of St. Julian’s were found to be making use of chillers whose condensers are cooled with saline water as opposed to air. The former practice is advantageous since it results in better chiller performance which can be explained through thermodynamic principles. The principle of operation of water cooled chillers is to reject heat from the condenser to saline groundwater obtained from boreholes through a heat exchanger. The higher temperature saline ground water is then rejected to the sea. Chillers cooled with saline groundwater are subject to the Borehole Drilling and Excavation …
An Analysis Of The Application Of Best Management Practices In Collaborative Watershed Management To Community-Based Sustainable Development, Rebecca Holthaus Sappenfield
An Analysis Of The Application Of Best Management Practices In Collaborative Watershed Management To Community-Based Sustainable Development, Rebecca Holthaus Sappenfield
Masters Theses, 2010-2019
This research seeks to determine if BMPs from CWM can inform the broader concept of CBSD. In order to answer this question, I conduct a desk study, which involves an extensive review of the CWM literature in two areas: stakeholder participation and building trust among stakeholders. I then analyze my research to deduce BMPs for these areas of CWM. As part of this analysis, I also explore how effective environmental communication plays a fundamental role in achieving these BMPs. The culmination of this work is the production of guidelines of best practice for stakeholder participation and building trust among stakeholders …
Public Perception On The State Of Air Quality In Malta, Nikolas Cassar
Public Perception On The State Of Air Quality In Malta, Nikolas Cassar
Masters Theses, 2010-2019
Public perception on the state of air quality is an unclear and hazy concept whereby every individual has different opinions and views. In fact, the state of air quality is a major concern in many countries, including in Malta. This problem arises from the emissions of a number of pollutants to the atmosphere from a host of processes such as the combustion of fuel to generate electricity and the internal combustion engines to manoeuvre cars. Amongst these pollutants, there are benzene and nitrogen dioxide, which are very hazardous since they cause problems related to human health and contribute in the …
A Resilience Assessment Of The Ramla Valley System, Gozo, Mykel Fenech
A Resilience Assessment Of The Ramla Valley System, Gozo, Mykel Fenech
Masters Theses, 2010-2019
The investigation delves into the application of the resilience concept to the ecological and anthropogenic systems of Ramla Valley, Gozo. The Resilience Assessment, the first of its kind attempted in the Islands, takes a holistic approach to study a system by considering the various system components and related pressures. Components considered include agricultural, ecological, sediment (beaches and dunes) and landscape. Current governance impacting the system was also considered. Methods used in this study were based on guidelines provided by the Resilience Alliance and supported by data derived from previous studies, interviews with interested parties, on-site observations, and comparative studies of …
Improving The Energy Efficiency Of Dehumidification Technology At A Large Facility In Florida, Brandon Willson Hoilett
Improving The Energy Efficiency Of Dehumidification Technology At A Large Facility In Florida, Brandon Willson Hoilett
Masters Theses, 2010-2019
This thesis examines energy use and management of twenty heat pipes used in dehumidification systems at a large (10,000+ acre) facility in Florida. Eleven of the twenty heat pipes use electric strip heaters that, when activated, consume 693.8 kW of electrical power from the grid. Solar photovoltaics, specifically a silicon monocrystalline cell with 22.5% efficiency, were considered as a means to provide an alternative energy source and opportunity for cost savings for 11 of the heat pipes (Sunpower, 2011). The remaining nine heat pipes use hot water heaters for which alternative energy sources were not considered. Data gathered and analyzed …
Electronic Voting: Methods And Protocols, Christopher Andrew Collord
Electronic Voting: Methods And Protocols, Christopher Andrew Collord
Masters Theses, 2010-2019
The act of casting a ballot during an election cycle has been plagued by a number of problems, both intrinsic and extraneous. The old-fashioned paper ballot solves a number of problems, but creates its own. The clear 21st Century solution is the use of an automated electronic system for collection and tallying of votes, but the attitude of the general populace towards these systems has been overwhelmingly negative, supported in some cases by fraud and abuse. The purpose of this thesis is to do a broad survey of systems available on the market now (both in industry and academia) and …
Class Control: An Adaptable And Self Configuring Classroom Control System, Thomas Grimes
Class Control: An Adaptable And Self Configuring Classroom Control System, Thomas Grimes
Masters Theses, 2010-2019
Class Control is a tool that was created at the University of St Andrews to allow a teacher to not only view all of the screens in a classroom at once but also take control of them and broadcast the teacher’s screen to them. Existing software wouldn’t allow the scalability to meet the demands of the size of the classroom so Class Control was developed and is still used by the school today.%0d%0aHowever, this tool was created to be used in one classroom just running the Mac OS. This thesis project aimed to add the ability to move this tool …
Data Carving Parser Generation, Benjamin Nathaniel Kelley
Data Carving Parser Generation, Benjamin Nathaniel Kelley
Masters Theses, 2010-2019
As our day to day interaction with technology continues to grow, so does the amount of data created through this interaction. The science of digital forensics grew out of the need for specialists to recover, analyze, and interpret this data. When events or actions, either by accident or with criminal intent create, delete or manipulate data, it is the role of a digital forensics analyst to acquire this data and draw conclusions about the discovered facts about who or what is responsible for the event. This thesisidentifies a gap in the research between data analysis and interpretation. Current research and …
A Path To A Renewable Energy System: A Financing And Regulatory Model, Edward Patrick Kelly
A Path To A Renewable Energy System: A Financing And Regulatory Model, Edward Patrick Kelly
Masters Theses, 2010-2019
As the effects of climate change become more and more evident, the necessity of transitioning to a carbon-free economy and powering our energy and transportation systems from renewables energy sources is quite evident. This transition to a renewable- based energy system will be a massive undertaking, similar to the efforts put into WWII, where the country was united with unity of purpose. Taking on the vested interests of the fossil fuel industry and all their subsidiaries will take a political will that does not exist in this country at this time. Hermann Scheer describes what he calls a social movement; …
Effectiveness Of Environmental Impact Assessment Process In The Maltese Islands, Romina Sciberras
Effectiveness Of Environmental Impact Assessment Process In The Maltese Islands, Romina Sciberras
Masters Theses, 2010-2019
A successful Environmental Impact Assessment (EIA) helps in contributing effectively to all spheres of sustainability namely environmental, social, cultural, and economic spheres. The objective of this study is to explore the extent of use in the EIA tool, to analyse the effectiveness of EIA throughout the entire cycle of the process focusing on the prediction and mitigation of impacts, public participation, monitoring and follow-up, and to assess the strengths and weaknesses of EIA in the Maltese Islands based on feedback from a variety of stakeholders involved in the named process, and to identify gaps and/or factors which limit effectiveness. The …
A System Dynamics Analysis Of The Growth In Virginia's Residential Electricity Consumption Trends, 1980-2010., Raguram Sellakkannu
A System Dynamics Analysis Of The Growth In Virginia's Residential Electricity Consumption Trends, 1980-2010., Raguram Sellakkannu
Masters Theses, 2010-2019
Residential electricity consumption in the Commonwealth of Virginia has more than doubled in three decades, between 1980 and 2010. Per capita and per household consumption rates have grown faster than many other states including New York and California. The following dissertation applies systems dynamics methodology to explore the causes of growth in Virginia’s per capita and per household residential electricity consumption rates in relative contrast to New York and California over the past several decades. Major databases used in the study were accessed from the United States Energy Information Administration and the Census Bureau. Qualitative modelling applying system dynamics principles …
Economic Life Cycle Assessment Of Aeration Blowers Used In Waste Water Treatment Systems, Manogaran Shriram
Economic Life Cycle Assessment Of Aeration Blowers Used In Waste Water Treatment Systems, Manogaran Shriram
Masters Theses, 2010-2019
Economic Life Cycle Assessment of Aeration Blowers used in Waste Water Treatment systems A substantial amount of energy is needed in water supply and treatment systems to convert the unprocessed water into safe drinking water or to purify wastewater prior to discharge to the environment. There is lot of water and energy lost in the process of collection, discharge and delivery of the treated drinking water as well. Therefore the energy and water consumption by these systems have an indirect effect on the local municipality in terms of high energy consumption and in permissive waste of water. Thus, an exhaustive …
Fingerprint Fuzzy Vault: Security Analysis And A New Scheme, Patrick J.B. Perry
Fingerprint Fuzzy Vault: Security Analysis And A New Scheme, Patrick J.B. Perry
Masters Theses, 2010-2019
A fingerprint fuzzy vault uses a fingerprint A to lock a strong secret k and only a close fingerprint from the same finger can be used to unlock k. An attacker who has stolen the vault will not be able to get useful information about A or k.%0d%0a In this research, we shall study the security of a major fingerprint fuzzy vault developed by Nandakumar et al. through investigating the security implication of helper data, which are stored in the fuzzy vault for fingerprint alignment. We will show that helper data leak information about fingerprints and thus compromise the security …
Origin Of The Low Frequency Radiation Emitted By Radiative Polaritons Excited By Infrared Radiation In Planar La2o3 Films, Anita J. Vincent-Johnson, Yosep Schwab, Harkirat S. Mann, Mathieu Francoeur, James S. Hammonds Jr., Giovanna Scarel
Origin Of The Low Frequency Radiation Emitted By Radiative Polaritons Excited By Infrared Radiation In Planar La2o3 Films, Anita J. Vincent-Johnson, Yosep Schwab, Harkirat S. Mann, Mathieu Francoeur, James S. Hammonds Jr., Giovanna Scarel
Department of Physics and Astronomy - Faculty Scholarship
Upon excitation in thin oxide films by infrared radiation, radiative polaritons are formed with complex angular frequency ω, according to the theory of Kliewer and Fuchs (1966 Phys. Rev. 150 573). We show that radiative polaritons leak radiation with frequency ωi to the space surrounding the oxide film. The frequency ωi is the imaginary part of ω. The effects of the presence of the radiation leaked out at frequency ωi are observed experimentally and numerically in the infrared spectra of La2O3 films on silicon upon excitation by infrared radiation of the 0TH type radiative polariton. The frequency ωi is found …
Excitation Of Radiative Polaritons By Polarized Broadband Infrared Radiation In Thin Oxide Films Deposited By Atomic Layer Deposition, Anita J. Vincent-Johnson, Andrew E. Masters, Xiaofeng Hu, Giovanna Scarel
Excitation Of Radiative Polaritons By Polarized Broadband Infrared Radiation In Thin Oxide Films Deposited By Atomic Layer Deposition, Anita J. Vincent-Johnson, Andrew E. Masters, Xiaofeng Hu, Giovanna Scarel
Department of Physics and Astronomy - Faculty Scholarship
This work contributes to the understanding of infrared radiation interaction with matter and its absorption for energy harvesting purposes. By exciting radiative polaritons in thin oxide filmswith polarized infrared radiation, a further evidence is collected that a link exists between radiative polaritons and the heat recovery mechanism hypothesized in previous research. In the voltage transient occurring when the infrared radiation is turned on, the observed time necessary to reach the maximum voltage and the voltage intensity versus angle of incidence exhibit a mismatch when generated by polarized and nonpolarized infrared radiation. The existence of collective charge oscillation modes in the …