Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"System Boundary"”.
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An analysis of system boundaries in hybrid carbon accounting methods
… accounting models and to assess the use of system boundary. Models currently available are either input-output based, (using macro-economic analysis), process-based, (using specific carbon emissions attributes through a life-cycle), or a hybrid of the two. A detailed comparison was made and …
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An analysis of influential methodological practices in consumption-based accounting methods
… accounting models and to assess the use of the system boundary. Models currently available are either input-output based, (using macro-economic analysis), process-based, (using specific carbon emissions attributes through a life-cycle), or a hybrid of the two. A detailed comparison was made and …
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Object-process networks & object-process diagrams : implementation issues for oil exploration systems
… the ability of OPN (Object-Process- Network), a system-architecture meta-language, to model complex systems and identify architectures to address those systems. It proposes ways to generate "out-of-the-box" solutions to technical problems, to weight a portfolio of objects as a possible way to …
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Pairing Quality and Quantity in a Mass Balance of Water in California
… of water. The method involves: delineating the system boundary for the water balance: selecting the water budget time period to be used for analysis; collecting water quantity data applicable to the selected system boundary and time period; drawing a modified mass flow diagram; selecting and …
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Life cycle analysis of hybrid poplar trees for cellulosic ethanol
… Cycle Assessment" (LCA) methodology is used to systematically evaluate the hybrid poplar's energy input and output as well as greenhouse gas (GHG) emissions. The system boundary is divided into three sections, agriculture, transportation, and ethanol processing. In this LCA, only energy from …
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Integrated transportation system design optimization
Traditionally, the design of a transportation system has focused on either the vehicle design or the network flow, assuming the other as given. However, to define a system level architecture for a transportation system, it is advantageous to expand the system boundary during the design process to …
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Life Cycle Analysis of Greenhouse Gas Emissions from the Mining and Milling of Uranium in Saskatchewan
… in two key respects. First, it has a very large system boundary which includes the uranium exploration and mine-mill decommissioning phases. Second, it utilizes a life cycle inventory database to include many processes which would normally fall outside of the system boundary due to their small …
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Use of blood oxygenator membrane units in teaching mass balances, friction factor and mass transfer analysis
… the oxygen present in each stream crossing the system boundary and applying a mass balance. At 3.78 L/min of blood analog flow and 1 SCFH of oxygen delivery, a mass transfer of 70 mg/min was observed. Liquid pressure drop through the oxygenator is measured by calibrated pressure transducers and …
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Embodied energetics : a digital design-production system for passive solar walls in Vinalhaven Island, Maine
I propose a digital design-production system to easily assemble, selectively disassemble, and reassemble novel passive solar walls. The problem statement I tackle is that all houses in Vinalhaven Island, Maine have high home-heating energy burden due to their thermally weak thin walls. Substituting …
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Evaluation of life cycle assessment methodology for multiple agroecosystems
… multifunctional woody polyculture (MWP) agroecosystems has been proposed as a potential strategy for mitigating these harmful impacts while still yielding high value crops. Life Cycle Assessment (LCA) has the potential to meaningfully capture these impacts, enabling improved decision making in …
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Using Codecharts for formally modelling and automating detection of patterns with application to Security Patterns
… will be difficult thereafter, especially for systems with poor documentation. Therefore, it is important to overcome these issues by patterns formalisation in order to allow sharing the same understanding of the patterns to be implemented. The current patterns formalisation approaches aim to …
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Dynamics of innovation policies and ecosystems in Japan
… growth from technology. However, innovation ecosystem is complicated and dynamic that make difficult for policymakers to understand the system and evaluate policy effect. In this study, we analyze innovation ecosystem around a university and build a system dynamics model to have policy …
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Implications of transitioning to green infrastructure: a quantitative sustainability assessment of stormwater management
… treatment loads (in the case of combined sewer systems) and pollution of surface water. Although green infrastructure technologies are becoming increasingly common and are propounded as being universally more sustainable than grey infrastructure, the economic and environmental implications of …
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Managing the impact of change through survivability and pliability to achieve viable systems of systems
As technology improves, traditional systems are being interconnected into larger systems of systems (SoS) that operate in diverse contexts, where numerous perturbations exist that threaten the ability of the SoS to deliver acceptable value to its diverse set of stakeholders. Furthermore, the …
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A systems analysis of the Army Substance Abuse Program
… Members. This thesis examines the program from a systems point of view, using the generic US Army installation for the system boundary, and how the system creates value for the installation enterprise. This thesis first explores the motivation for this research, drawing on contemporary reports …
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A macro-micro system architecture analysis framework applied to Smart Grid meter data management systems by Sooraj Prasannan.
… a framework for architectural analysis of a system at the Macro and Micro levels. The framework consists of two phases -- Formulation and Analysis. Formulation is made up of three steps -- Identifying the System Boundary, Identifying the Object-Process System levels using the Object-Process …
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Inhomogeneous Totally Asymmetric Simple Exclusion Processes: Simulations, Theory and Application to Protein Synthesis
… overall stationary current. To study this matter systematically, we first explore the effects of local inhomogeneities, i.e., one or two slow sites of hopping rate q<1 in TASEP for particles of size ell > 1(in the unit of lattice site) using Monte Carlo simulation. We compare the results of ell =1 …
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Techno-economic Analysis and Strategic Decarbonization of the Indian Cement Industry
… due to dwindling resources that may cause these systems to become obsolete in the future. Considering these factors, alternative binders with varying emission intensities and raw material reserves such as geopolymers and other green cement types were optimized to solve for the ideal mix that …
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A technology-driven solution to disrupt the residential real estate industry of existing homes
… conditions. Then, exogenous factors on the system boundary are researched to provide context and a holistic view of the industry in which a proposed system would exist. Following this, concepts are generated using an intra-industry morphological matrix approach. However, in the concept …
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Correlated electron transport across atomic and molecular tunnel junctions
… molecules and may be thought of as the prototype system for electronics on a few nanometre length scale. For charge transport calculations such systems are usually treated with a single particle approximation such as NEGF+DFT non-equilibrium Green’s function plus density functional theory. Typical …
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