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Dissertations / Theses on the topic 'Energy limitations'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Atwater, Joel. "Limitations on tidal-in-stream power generation in a strait." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/635.

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In the quest to reduce the release of carbon dioxide to limit the effects of global climate change, tidal-in-stream energy is being investigated as one of many possible sustainable means of generating electricity. In this scheme, turbines are placed in a tidal flow and kinetic energy is extracted. With the goal of producing maximum power, there is an ideal amount of resistance these turbines should provide; too little resistance will not a develop a sufficient pressure differential, while too much resistance will choke the flow. Tidal flow in a strait is driven by the difference in sea-level

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2

Pickering, Jason C. Pickering. "Understanding Coulombic Efficiency Limitations in an Acid-Base Energy Storage System: Mass Transport Through Nafion." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1528397906336044.

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3

Mentis, Dimitris. "Spatially explicit electrification modelling insights : Applications, benefits, limitations and an open tool for geospatial electrification modelling." Doctoral thesis, KTH, Energisystemanalys, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207801.

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Developing countries confront the challenge of generating more electricity to meet demands in a sustainable manner. According to the World Bank’s 2015 Global Tracking Framework, roughly 15% of world population (or 1.1 billion people) lack access to electricity, and many more rely on poor quality electricity supplies. In September 2015, the United Nations General Assembly adopted Agenda 2030 comprised of a set of 17 Sustainable Development Goals (SDGs) and defined by 169 targets. “Ensuring access to affordable, reliable, sustainable and modern energy for all by 2030” is the seventh goal (SDG7).

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4

Carvalho, Gustavo Macêdo de. "Benefits and limitations of Fuzzy Cognitive Maps based scenarios: the case of Brazilian solar photovoltaic energy." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/12/12139/tde-27112017-123904/.

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After the Second World War, there was an expression of interest in the study of the future. In order to achieve reliable objectives, several methods of scenario planning were invented. These methods comprise of qualitative and quantitative approaches inherited from their own school of origin. Each approach has advantages and limitations that can be observed by the study of each method in progress. However, mixed approaches often show a weak connection between qualitative and quantitative methods. The use of fuzzy cognitive maps (FCMs), among scenario planning approaches, can overcoming the lim

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5

Johnson, Nathan Gregory. "Decision making limitations from communication barriers in government structures in Chinese rural energy projects." [Ames, Iowa : Iowa State University], 2008.

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6

Sjölin, Martin. "On the Fundamental Limitations of Timing and Energy Resolution for Silicon Detectors in PET Applications." Thesis, KTH, Fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101790.

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7

Hippenstiel, Friederike [Verfasser]. "Energy and nitrogen use efficiency in farm animal nutrition : opportunities and limitations for improvement / Friederike Hippenstiel." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1043057803/34.

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8

Gramajo, German G. "Guidance control of small UAV with energy and maneuverability limitations for a search and coverage mission." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1526913.

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<p> This thesis presents an algorithm for a search and coverage mission that has increased autonomy in generating an ideal trajectory while explicitly considering the available energy in the optimization. Further, current algorithms used to generate trajectories depend on the operator providing a discrete set of turning rate requirements to obtain an optimal solution. This work proposes an additional modification to the algorithm so that it optimizes the trajectory for a range of turning rates instead of a discrete set of turning rates. This thesis conducts an evaluation of the algorithm with

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9

Gabrielyan, Marianna. "RELATIVE ENERGY CALIBRATION OF THE TJNAF HALL-B PHOTON TAGGER AND INVESTIGATION OF LIMITATIONS OF THE PHOTON TAGGING TECHNIQUE." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/405.

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In this work we report on two sets of measurements involving the Hall-B photon tagging system of the Tomas Jefferson National Accelerator Facility. The relative energy calibration of the tagging counters was performed by using the PrimEx pair spectrometer and a series of high position resolution micro-strip detectors. The photon energies were determined by forming coincidence between the tagger and the e+ e- pairs for several values of the pair spectrometer magnetic field between 0.36T to 1.9T (total of 180 fields). The second set of measurements, collected in conjunction with the Fall 2004 Pr

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10

Braune, Yann. "Investments in Academic Renewable Electricity Generation Technology Spin-Offs : A Qualitative Study on High Capital Limitations for Underexplored Renewable Energy Sources." Thesis, Uppsala universitet, Industriell teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413527.

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Due to an intensified climate change discourse, renewable energy technologies find higher attention within the energy system and increasingly compete with traditional energy conversion systems. Electricity is progressively being generated through renewable electricity generation technologies (REGT) which harness naturally existing energy fluxes (wind, tide, heat, sun) and convert it to electricity. High investments are currently being made into well-developed REGT using explored energy sources such as wind, hydro or solar. In order to increase cost- and energy efficiency of REGTs, university r

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11

Tsvetkova, Galina Valeryevna. "An autonomous long-term fast reactor system and the principal design limitations of the concept." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/36.

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The objectives of this dissertation were to find a principal domain of promising and technologically feasible reactor physics characteristics for a multi-purpose, modular-sized, lead-cooled, fast neutron spectrum reactor fueled with an advanced uranium-transuranic-nitride fuel and to determine the principal limitations for the design of an autonomous long-term multi-purpose fast reactor (ALM-FR) within the principal reactor physics characteristic domain. The objectives were accomplished by producing a conceptual design for an ALM-FR and by analysis of the potential ALM-FR performance character

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12

Dutia, Dharini. "Multi-Robot Task Allocation and Scheduling with Spatio-Temporal and Energy Constraints." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-theses/1298.

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Autonomy in multi-robot systems is bounded by coordination among its agents. Coordination implies simultaneous task decomposition, task allocation, team formation, task scheduling and routing; collectively termed as task planning. In many real-world applications of multi-robot systems such as commercial cleaning, delivery systems, warehousing and inventory management: spatial & temporal constraints, variable execution time, and energy limitations need to be integrated into the planning module. Spatial constraints comprise of the location of the tasks, their reachability, and the st

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13

Beckman, Mathias, and Gerald Volden Alex Christy. "Performance Assessment of Electrical Motor for Electric Aircraft Propulsion Applications : Evaluation of the Permanent Magnet Motor and its Limitations in Aircraft Propulsion." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-45157.

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This thesis project will evaluate which kind of electrical motor is best suited for aircraft propulsion and which parameters effect the efficiency. An economic analysis was conducted, comparing the fuel price (Jet A1) for a gas turbine and the electricity price for an electric motor of 1MW. The study was conducted by using analytical methods in MATLAB. Excel was used to compile and present the data. The data used in this thesis project were assumed with regards to similar studies or pre-determined values. The main losses for the Permanent Magnet Synchronous Motor (PMSM) were calculated to achi

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14

Gray, Declan Alan. "Survival of non-sporulating Bacillus subtilis upon energy limitation." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3809.

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Bacillus subtilis has the capacity to undergo cell differentiation into distinct phenotypes. The most studied phenotype is the dormant cell type named endospore which persists in unfavourable conditions for extended periods of time. Nevertheless sporulation is not adopted by the entire cell population. During nutrient exhaustion a subpopulation of cells survives while the remaining cells either sporulate or lyse. How these surviving cells endure adverse environmental conditions is currently unclear. Incubation of non-sporulating B. subtilis under nutrient starvation revealed their capacity to

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15

Tran, Bich Thi Ngoc. "The impact of nitrogen limitation and mycorrhizal symbiosis on aspen tree growth and development." Thesis, The University of Alabama in Huntsville, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1570507.

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<p> Nitrogen deficiency is the most common and widespread nutritional deficiency affecting plants worldwide. Ectomycorrhizal symbiosis involves the beneficial interaction of plants with soil fungi and plays a critical role in nutrient cycling, including the uptake of nitrogen from the environment. The main goal of this study is to understand how limiting nitrogen in the presence or absence of an ectomycorrhizal fungi, <i>Laccaria bicolor,</i> affects the health of aspen trees, <i>Populus tremuloides.</i> Under limited nitrogen conditions, aspen tree growth and development is reduced, and mycor

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16

Odden, Dan Adrian. "Development of heat pipes with potassium as woking fluid: Performance limitations and test rig development." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18600.

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The incentive to reduce energy consumption in the industry is big, especiallyin high temperature systems. Heat pipes are of great interest for this purposedue to their favorable thermomechanical properties. This master thesis is apart of the ongoing study of Ph.D. candidate Geir Hansen, who is currentlydeveloping a rectangular heat pipe with potassium as working fluid at NTNU.The rectangular heat pipe is intended to be implemented in the walls ofelectrolysis cells as a part of a heat recovery system.The present work reports results of theoretical calculations of two importantheat transfer limi

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17

Viblanc, Vincent Alexandre Vasudev. "Coping with energy limitation, social constraints and stress in a colonial breeder, the king penguin (Aptenodytes patagonicus)." Strasbourg, 2011. http://www.theses.fr/2011STRA6191.

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Cette thèse s’intéresse aux stratégies comportementales et physiologiques permettant à un oiseau colonial, le manchot royal, de se reproduire sous de fortes contraintes énergétiques (jeûne prolongé) et sociales (forte densité de congénères) potentiellement stressantes. Utilisant la fréquence cardiaque (FC) comme indicateur de la dépense énergétique et de la réponse au stress, elle considère : 1) le coût énergétique des comportements majeurs (confort et agressivité) du manchot royal se reproduisant à terre, questionnant leur signifiance évolutive; 2) les changements physiologiques (FC, températ

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18

Danner, Raymond Michael. "The Effects of Limited Winter Food Availability on the Population Dynamics, Energy Reserves, and Feather Molt of the Swamp Sparrow." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/38688.

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Small birds likely face energetic challenges in temperate zone winters posed by cold weather coupled with food scarcity. These challenges are often assumed to occur, but are rarely experimentally tested. I hypothesized that the naturally occurring, lower abundances of food in temperate zone winters limit a birdâ s ability to acquire optimal energy and ultimately limit fitness. In this dissertation, I show that supplementation of food decreased mortality and improved traits potentially associated with future reproductive success of wild swamp sparrows (Melospiza georgiana), supporting the h

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19

Clark, Melinda Erin. "Physiological Analysis of Desulfovibrio vulgaris Hildenborough Under Conditions Relevant to the Subsurface Environment: Carbon and Energy Limitation and Biofilm Formation." Oxford, Ohio : Miami University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1218999819.

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20

Liu, Hang. "In situ investigations of chemical reactions on ZnO-Pt model nanocatalysts for environmentally friendly energy generation sources." Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS201.pdf.

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Il a été démontré que le catalyseur ZnO/Pt(111) présente des performances catalytiques remarquables dans l'oxydation du CO à basse température. L'identification des sites actifs dans l'oxydation du CO est importante pour une compréhension mécaniste de la relation structure-réactivité. Nous avons d'abord établi une recette pour fabriquer des films minces de ZnO sur Pt(111) par évaporation par faisceau électronique, caractérisée par STM et LEED. Le film se développe en mode couche par couche, à parti rd'une monocouche de type grapheme jusqu'à la surface ZnO(0001)-Zn terminée. Le rôle des limites

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21

Pedersen, Karen M. "LIMITATIONS OF HOST PLANT USE IN TWO ANDEAN ALTINOTE (NYMPHALIDAE, HELICONIINEA, ACRAEINI), BUTTERFLIES, FROM A TRITROPHIC PERSPECTIVE." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1430819995.

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22

Knudsen, Christelle. "Stratégies de limitation de l'ingestion : optimisation des performances zootechniques, impacts physiologiques et conséquences sur la santé digestive." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0132/document.

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Dans un contexte de limitation de l'utilisation des antibiotiques, de nouvelles stratégies doivent être mises en place pour préserver la santé des animaux, en particulier lors du sevrage. En cuniculture, les stratégies de limitation de l'ingestion permettent de réduire les troubles digestifs en post sevrage et améliorent l'efficacité alimentaire, mais induisent inévitablement un retard de croissance et une baisse du rendement à l'abattage. Ce travail de thèse avait pour objectif d'une part d'optimiser les performances de croissance et de rendement à l'abattage des animaux soumis à une restrict

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23

Boysen, Lena Verfasser], Wolfgang [Gutachter] [Lucht, Christoph [Gutachter] Schneider, and Andrew [Gutachter] Friend. "Potentials, consequences and trade-offs of terrestrial carbon dioxide removal : strategies for climate engineering and their limitations / Lena Boysen ; Gutachter: Wolfgang Lucht, Christoph Schneider, Andrew Friend." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2017. http://d-nb.info/1129750612/34.

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24

Boysen, Lena R. [Verfasser], Wolfgang [Gutachter] Lucht, Christoph [Gutachter] Schneider, and Andrew [Gutachter] Friend. "Potentials, consequences and trade-offs of terrestrial carbon dioxide removal : strategies for climate engineering and their limitations / Lena Boysen ; Gutachter: Wolfgang Lucht, Christoph Schneider, Andrew Friend." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2017. http://nbn-resolving.de/urn:nbn:de:kobv:11-100246038.

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25

Štěrba, Marek. "Sadová, Bytový dům M1 - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372154.

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The aim of the diploma thesis is construction-technological project of the whole construction focusing on the main building object - Apartment building, which is based on large-diameter drilling piles. The basis of the work is the budget of the main building and its timetable. Part of the thesis is a solution of organization of construction and design of building site equipment, technological regulation of selected activities, quality control and solution of transport relations including oversized transport. In addition, the design of the machine assembly, assessment of lifting mechanisms, saf

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26

Djebarri, Sofiane. "Contribution à la modélisation et à la conception optimale de génératrices à aimants permanents pour hydroliennes." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0012/document.

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L'amélioration des performances des chaînes de conversion dédiées à la récupération d'énergie par les hydroliennes est un point particulièrement important pour rendre cette ressource économiquement attractive. La minimisation du coût de l'énergie produite passe nécessairement par une amélioration des performances de la chaîne de conversion électromécanique et une réduction des coûts de maintenance et de production des éléments la constituant. Dans ce contexte particulier, les génératrices à aimants permanents apparaissent particulièrement intéressantes dans la mesure où elles sont bien adaptée

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27

Wolf, Derek. "Adjusting Expectations of Scale Based on Limitations of Supply: A Review of the Case for a Forest Bioenergy Strategy that Prioritizes Decentralization, Efficiency, and Integration." Thesis, 2012. http://hdl.handle.net/1807/33589.

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The limitations of renewable energy technologies require that pathways are carefully chosen such that renewable resources are used most effectively in addressing modern energy challenges. Optimized decision-making is particularly challenging for the forest bioenergy sector because of the multitude of potential pathways and because profit is highly sensitive to biomass procurement costs. I assessed energy wood recovery and procurement costs during semi-mechanized selection operations in the tolerant hardwood forests of Ontario. Logging contractors were able to recover unmerchantable sections of

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28

Kolisnyk, Ben. "The limitations of extant theories of nuclear proliferation to explain the case of the Democratic People's Republic of Korea." 2010. http://hdl.handle.net/1993/4128.

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Theories of nuclear weapons proliferation cannot fully account for the nuances of certain cases because proliferation is a complex process involving numerous variables, the importance of which can potentially shift across time. This seems especially true when applied to the case of the Democratic People’s Republic of Korea (DPRK) where motivations have shifted in relevance numerous times in its proliferation history. In order to investigate this, this thesis reviews extant theories of nuclear proliferation and their ability to explain the case of the DPRK by critically examining its historic

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29

Dykstra, Cheryl Joan. "Digestive adjustment to increased energy demands and a test of energetic limitation to brood size in house wrens." 1991. http://catalog.hathitrust.org/api/volumes/oclc/23978855.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1991.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 81-88).

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