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Dantsoho, Abubakar Mahmud. "Risk-based framework for safety management of onshore tank farm operations." Thesis, Liverpool John Moores University, 2015. http://researchonline.ljmu.ac.uk/4496/.
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The onshore tank farm operations has become more useful and handy, as a result of increased international sea-borne trade, particularly, the unprecedented higher volume of petroleum products and hazardous chemicals traffic globally. The onshore tank farm is a facility used for safe discharge, loading and storage of petroleum products and other hazardous chemicals at the ports. It has become an important element in the supply chain system because of the increased universal energy demand and the fact that large number of modern tanker vessel is busy and efficiently moving cargo to different destinations around the world. The tank farm serves as a back-up facility to the ports. However, it has high degree of system-wide challenges of potential major incidents/accidents, as evidenced in various tank farm recorded accidents, which occurred at different times with estimated losses valued in millions of US dollars. The accidents could be catastrophic, leading to deaths, extensive damages and adverse impact on environment. To eliminate or minimize the risk of major incident/accidents, as well as minimize the magnitude and severity, it is acutely urgent to uncover and assess all potential hazards, with a view to adopt the best preventive/mitigative policy direction in the management of this strategic facility. This thesis presents multiple safety/risk assessment approaches, uncertainties treatments and decision making techniques that are capable of finding optimal solutions that will ensure safety of tank farm operations. The standard tools of analysis employed in this tank farm operational risk assessment are Failure Mode Effect Analysis (FMEA), Faulty Tree Analysis (FTA), fuzzy logic, Analytic Hierarchy Process (AHP) and Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS). Firstly, the FMEA-Fuzzy Rule Based (FRB) is applied in Hazard Identification (HAZID) and risk evaluation of tank farm operations. The methodology is utilized to discover five possible causes of catastrophic accidents in tank farm operations. The causes/hazards are described as the automatic shut-down oil safety valve failure, pipe corrosion protection system failure, automatic tank gauge system failure, leak detection device system failure, and secondary containment monitoring system failure. In the risk assessment conducted, the leak detection system failure was identified as the riskiest hazard using the Expected Utility Theory. Consequent upon the need for further investigation, another technique, Fuzzy Fault Tree (FFT), as novel model is used successfully to investigate and understand the causes of the leak detection system failure. The main aim of these two exercises is to assess risks and facilitate proper manage of these risks in tank farm operations, in order to forestall accidents that could cause damage to the facility, workers and the port environment. Nevertheless, the tank farm operations need to be optimized by ensuring the efficiency and safety of all systems and sub-systems through the adoption of best safety management decisions, which is achieved by employing AHP-TOPSIS model. This method is used to solve a complex multi-criteria decision-making problem such as selection of best Safety Control Design (SCD) among various SCDs identified. Finally, the results produced from the developed models and frameworks are summarized and other areas where they can effectively make impacts in HAZID, risk assessment and safety improvement are defined.
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Yu, Xu. "Tank-to-Wheel Energy Breakdown Analysis." Thesis, KTH, Fordonsdynamik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280559.
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In early design phase for new hybrid electric vehicle (HEV) powertrains, simulation isused for the estimation of vehicle fuel consumption. For hybrid electric powertrains,fuel consumption is highly related to powertrain efficiency. While powertrainefficiency of hybrid electric powertrain is not a linear product of efficiencies ofcomponents, it has to be analysed as a sequence of energy conversions includingcomponent losses and energy interaction among components.This thesis is aimed at studying the energy losses and flows and present them in theform of Sankey diagram, later, an adaptive energy management system is developedbased on current rule-based control strategy. The first part involves developing energycalculation block in GT-SUITE corresponding to the vehicle model, calculating allthe energy losses and flows and presenting them in Sankey diagram. The secondpart involves optimizing energy management system control parameters according todifferent representative driving cycles. The third part involves developing adaptiveenergy management system by deploying optimal control parameter based on drivingpattern recognition with the help of SVM (support vector machine).In conclusion, a sturctured way to generate the Sankey diagram has been successfullygenerated and it turns out to be an effective tool to study HEV powertrain efficiencyand fuel economy. In addition, the combination of driving pattern recognition andoptimized control parameters also show a significant potential improvement in fuelconsumption.Under den tidiga utvecklingsfasen av nya elektrifieradedrivlinor for hybridapplikationer (HEV) används simulering för uppskattning avfordonets bränsleförbrukning. För dess drivlinor är bränsleförbrukningen i hög gradkopplad till drivlinans verkningsgrad. Även om drivlinans verkningsgrad inte ären linjär prokukt av komponenternas verkningsgrad behöve rden analyseras somen sekvens av energiomvandlingar, inklusive förluster och energipåverkan mellankomponenter.Detta examensarbete syftar till att undersöka energiförluster och flöden samtpresentera dessa i form av sankey diagram. Senare utvecklas ett anpassningsbartenergihanteringssystem baserat på nuvarande regelbaserad kontrollstrategi. Deninledande delen involverar utvecklandet av energianalys i GT-SUITE som motsvararfordonsmodellen, beräkningar av totala energiförluster och flöden samt presentationav dessa i ett sankey diagram. Den andra delen innefattar optimering avenergihanteringssystems kontrollparametrar enligt olika representativa körcykler.Den tredje delen involverar utveckling av anpassningsbara energihanteringssystemgenom användning av optimala kontrollparameterar baserad på detektering avkörbeteende med hjälp av SVM ( stödvektormaskin).Slutligen, ett strukturerat sätt att generera sankey diagrammet har med framgånggenererats och visat sig vara ett effektivt verktyg för studier av HEV drivlinorseffektivitet och bränsleekonomi. Dessutom visar kombinationen av detektering avkörbeteende och optimerade kontrollparametrar på en markant potentiell förbättringi bränsleförbrukning.
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Millspaugh, Kevin C. "The M1 Abrams tank : a case study in major weapon systems acquisition and program management /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA303244.
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Thesis (M.S. in Systems Management) Naval Postgraduate School, June 1995.Thesis advisor(s): David F. Matthews, Mark W. Stone. "June 1995." Includes bibliographical references. Also available online.
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Abhayawardana, Nuwan [Verfasser]. "The tank systems in the dry zone Sri Lanka: evolution, management and traditional knowledge / Nuwan Abhayawardana." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1200919084/34.
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Rodriguez, Henry. "A Comparison of Rainwater Harvesting Tank Sizing Methods: Optimizing to Reduce Greenhouse Gas Emissions versus Maximizing System Reliability." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo151577155419202.
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Tank, Ann Katarina [Verfasser]. "Einflussfaktoren und Wirkungen neuronaler Prozesse der Informationsgewichtung, Informationsaufnahme und Informationsverarbeitung in ökonomischen Entscheidungssituationen : Eine Untersuchung mittels funktioneller Magnetresonanztomographie (fMRT) / Ann Katarina Tank." Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2017. http://d-nb.info/1160480885/34.
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Charles, Katrina Civil & Environmental Engineering Faculty of Engineering UNSW. "Quantitative microbial risk assessment: a catchment management tool to delineate buffer distances for on-site sewage treatment and disposal systems in Sydney??s drinking water catchments." Publisher:University of New South Wales. Civil & Environmental Engineering, 2009. http://handle.unsw.edu.au/1959.4/43397.
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On-site sewage systems, such as septic tank-absorption trenches, are used by approximately 20 000 people who live within the catchments that supply Sydney??s drinking water. These systems discharge sewage, treated to varying degrees depending on the system type and level of maintenance, to the environment. This can result in contamination of drinking water supplies if systems are not designed or managed appropriately. The aim of the project was to develop a methodology to define appropriate buffer distances between on-site sewage systems and waterways in Sydney??s drinking water catchments, to ensure the protection of drinking water quality. Specific objectives included: identifying the current status of on-site sewage management; assessing the effluent quality and treatment performance of septic tanks, aerated wastewater treatment systems (AWTS) with disinfection and an amended material sand mound; and development of an appropriate methodology for delineating buffer distances and assessing development applications. Viruses were used as a focus for delineating the buffer distances due to their mobility and robustness in the environment, and the potential health consequences of their presence in drinking water. A Quantitative Microbial Risk Assessment (QMRA) model was developed to calculate the cumulative impact of the on-site sewage systems in the Warragamba catchment based on data from literature and experiments, with consideration of virus loads from sewage treatment plants within the catchments. The model enabled consideration of what was a tolerable impact in terms of the resulting infections within the community. The QMRA the tolerable loads of viruses from the Warragamba catchment were 108 viruses per year in raw water and 104 viruses per year in treated water. A log reduction method was developed to facilitate individual site development assessments. This method was compared to other management approaches to development assessment: fixed minimum buffer distances of 100m, reducing failure rates to zero, and the use of a preferred system. Each of these methods had a limit for how much they could reduce virus loads to the catchment due to either failure or short buffer distances at some sites. While the log reduction method is limited by the failure rates, the method provides a quantitative measure of risk by which maintenance inspections can be prioritised.
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Rönneke, Johanna. "Water as a common resource - Whose responsibility? : A Study on the Efficiency of Community Involvement in Water Management in India." Thesis, University of Kalmar, University of Kalmar, School of Pure and Applied Natural Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-2076.
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The aim of this study was to evaluate the impact of community involvement on management of water tanks in the Arkavathi sub-basin in the state of Karnataka, South India. Water management was analysed from a socio-environmental perspective, with emphasis on village-level stakeholders’ roles and perceived responsibility. The efficiency of community participation was investigated by comparing two villages having undergone the same World Bank launched program to restore water bodies traditionally used to sustain the livelihood of the rural population. In one village there was a resistance towards how the implementation of the tank rejuvenation project had been performed, in the other there was no local involvement.
A minor field study was conducted by visiting the two villages. Qualitative interviews were held with village-level stakeholders of three age groups, to analyse changes over time in knowledge and attitudes. Additionally, ocular observation and photo documentation were made of the study areas. Some informal interviews were carried out with members of an external non-governmental organisation and locals in the study villages. The collected data were analysed by comparing the results for the two villages, as well as the results of the different age groups and genders.
There were significant differences in awareness and sense of responsibility, but not knowledge, between the two villages. In the village with a community involvement resisting the governmental scheme for tank renovation, this involvement had proved to be of some advantage to the local community. Contrary to the guidelines, the governmental implementation of the water management strategy did not include local stakeholders’ participation, nor were the tanks restored. Overall, the villagers considered the tank management to be the responsibility of external authorities. There were generally no significant differences between the age groups or men and women, though there were indications of a lower level of knowledge and awareness in women. Absence of effective institutions for water management on all levels as well as difficulties in mainatining efficient village level leadership for community participation are factors causing a major gap between planning and implementation.
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Jönsson, Ellen, and Gilbert Gullberg. "Decarbonization of Freight Transport at a Manufacturing Company : A Case Study of the International Manufacturer Rosemount Tank Radar AB." Thesis, Linköpings universitet, Industriell ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-178015.
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International manufacturing companies are shipping goods worldwide, resulting in interorganizational freight transportation where customers, suppliers, and logistics partners are involved in the transportation processes. This interorganizational nature of freight transport emissions has made them difficult to address, as they can be seen as not being connected to only one single company’s decisions. With the relevancy, consciousness, and interest of going greener being on the rise on a global level, many studies have made a call for a wider perspective on how manufacturing companies can work with reducing Carbon Dioxide (CO2) emissions from transport related to their business. This thesis addresses that call, and the research purpose of this thesis is to explore how a manufacturing company can achieve continuous and controlled reduction of CO2 emissions from freight transport. This study develops a framework in support of decarbonizing freight transport at a manufacturing company, through the adapting of Green Supply Chain Management (GSCM) activities, enabled by Strategy and Management Control Systems (MCSs). In sum, it is explored how a manufacturing company can adapt GSCM activities for decarbonization of freight transport as part of a decarbonization strategy, that is implemented and sustained within the company through MCSs. This master thesis studies the case company Rosemount Tank Radar AB, a Sweden-based manufacturer of measurement instrumentation with high levels of export. To find the relevant strategy and management control concepts and theories, a literature study was first conducted. Based on this literature study, a case study of the company was then performed. Following the case study, case findings were analyzed and related to the concepts and theories found in the literature study, leading to the final framework. The framework constitutes the overall conclusion, and a mapping of the analysis on how manufacturing companies can reduce their CO2 emissions from freight transport through the approach based on GSCM, decarbonization strategy, and MCSs. The framework gathers identified decarbonization strategy scopes for greener transports found within the research field of GSCM and the case study. These decarbonization strategy scopes are then set in relation to the identified strategy and control management concepts and tools, that support efficient and tangible implementation of the decarbonization strategy. On a practical level, the framework developed in this thesis is suggested to bring a foundation for discussions among supply chain managers at manufacturing companies that are looking to define or redefine their decarbonization strategy in order make their freight transport greener. As the case study findings of this master thesis also proposes, greener supply chain transport practices can lead to cost savings and better customer experiences, in addition to reducing CO2 emissions.
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Nie, Juhe. "Civil Think Tank's Business Model and Management Framework : A case study at Youthink Center." Thesis, KTH, Maskinkonstruktion (Inst.), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298792.
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Think tanks are identified as policy research institutions that conduct interdisciplinary research on social or policy issues and provide consultation with the government, enterprises and the general public. Civil think tanks place social value prior to profits and uphold research independence. Through producing research content on social issues, civil think tanks make contribution with publications, advocacy, and action promotion. Civil think tanks are facing challenging complexity and obstacles in development due to their independence from governments and universities. To resolve these difficulties, civil think tanks require an innovative business model and a matching management mechanism. This thesis aims to understand the business model performed by civil think tanks and explore a practical management model to support this business. Specific recommendations will be made to the case organization. The case study was performed in collaboration with Youthink Center, one of China’s leading civil think tanks which provides young people with a platform to learn, take advocacy, and action on global frontier issues about sustainable development. A systematic literature review was conducted to elaborate concepts connected to think tanks and understand existing management frameworks. Data regarding this research project was collected through internal and external interviews and documentations.The case-study resulted in an evaluation on the business model of Youthink Center and a proposed management framework in accordance with the business. Key aspects of succeeding in a think tank are to insist on the value proposition of social responsibility and to enhance content creation and influence expansion ability with digital tools. To make this business model operate effectively, think tanks are expected to focus on project management processes, talent gathering, evaluation mechanism, and deeper collaborations on knowledge and technology. Understanding these areas will guide the social think tanks to increase working efficiency and enhance social influence.Tankesmedjor (think tanks) identifieras som politiska forskningsinstitutioner som bedriver tvärvetenskaplig forskning om sociala eller politiska frågor och erbjuder samråd med regeringen, företag och allmänheten. Civila tankesmedjor lägger socialt värde före vinst och upprätthåller forskningsoberoende. Genom att producera forskningsinnehåll om sociala frågor bidrar civila tankesmedjor med publikationer, förespråkande och handlingsfrämjande. Civila tankesmedjor står inför utmanande komplexitet och hinder i utvecklingen på grund av deras oberoende från regeringar och universitet. För att lösa dessa svårigheter kräver civila tankesmedjor en innovativ affärsmodell och en matchande hanteringsmekanism. Denna uppsats syftar till att förstå den affärsmodell som utförs av civila tankesmedjor och utforska en praktisk ledningsmodell för att stödja denna verksamhet. Specifika rekommendationer kommer att ges till fallorganisationen. Fallstudien utfördes i samarbete med Youthink Center, en av Kinas ledande civila tankesmedjor som ger ungdomar en plattform för att lära sig, ta förtal och agera i globala gränsfrågor om hållbar utveckling. En systematisk litteraturgranskning genomfördes för att utarbeta begrepp kopplade till tankesmedjor och förstå befintliga ledningsramar. Data om detta forskningsprojekt samlades in genom interna och externa intervjuer och dokument. Fallstudien resulterade i en utvärdering av affärsmodellen för Youthink Center och en föreslagen ledningsram i enlighet med verksamheten. Nyckelaspekter för att lyckas med en tankesmedja är att insistera på värdet av socialt ansvar och att förbättra innehållsskapandet och påverka expansionsförmågan med digitala verktyg. För att få denna affärsmodell att fungera effektivt förväntas tankesmedjor att fokusera på projektledningsprocesser, talangsamling, utvärderingsmekanismer och djupare samarbete om kunskap och teknik. Att förstå dessa områden kommer att vägleda de sociala tankesmedjorna för att öka arbetseffektiviteten och förbättra det sociala inflytandet.
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Muzondo, Shingirirai. "Knowledge production in a think tank: a case study of the Africa Institute of South Africa (AISA)." Thesis, University of Fort Hare, 2009. http://hdl.handle.net/10353/252.
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The study sought to investigate the system of knowledge production at AISA and assess the challenges of producing knowledge at the institution. The objectives of the study were to: identify AISA‟s main achievements in knowledge production; determine AISA‟s challenges in producing knowledge; find out how AISA‟s organizational culture impacts on internal knowledge production; and suggest ways of improving knowledge production at AISA. A case study was used as a research method and purposive sampling used to select 50 cases out of a study population of 70. Questionnaires were prepared and distributed to AISA employees and where possible face-to-face interviews were conducted. Both quantitative and qualitative methods were used to analyze the data which were collected. Findings of the study may be used by governments across sub-Saharan Africa to produce relevant knowledge for formulating and implementing economic, social and technological policies. It is also important in identifying challenges that may hinder the successful production of knowledge. The study revealed that AISA has a well defined system of knowledge production and has had many achievements that have contributed to its relevance as a think tank today. The study found out that AISA has faced different challenges with the main one being organizational culture. From the findings, the researcher recommended that AISA should establish itself as a knowledge-based organization. It should also create a knowledge friendly culture as a framework for addressing the issue of organizational culture.
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Rao, P. Sharath Chandra. "Analysis of fluid circulation in a spherical cryogenic storage tank and conjugate heat transfer in a circular microtube." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000461.
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Abell, Dixon Harold. "A Study of the Cause of Failure of Rotationally Molded, High-Density Polyethylene, Sodium Hypochlorite Storage Tanks." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2609.
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The topic of chemical oxidative degradation in rotational molded polyethylene (high-density cross-linked) chemical (sodium hypochlorite) storage tanks is an industry problem that ranks at the top of current business issues for manufacturers of chemical storage tanks. The degradation of these tanks not only compromises the physical and mechanical properties of the tank material, but reduces the life expectancy of the tank, eventually resulting in catastrophic tank failure. Premature tank failure comes at a hefty cost. The reputation of the manufacturer is questioned often resulting in immediate loss of customer satisfaction and future business. The leaking of the chemical from the failed tank serves as a liable environmental hazard that jeopardizes the safety and welfare of its surroundings – people and environment. And the associated manufacturer of the failed tank is almost certainly responsible for the repair or replacement of the tank. All these associated problems and many more related to chemical tank failure cost this relatively small industry millions of dollars annually. The need to determine the failure mechanisms of these tanks is critically important. Such an understanding will provide industry with useful knowledge that will open the door for improvements in tank performance. There is no question that a deeper understanding of failure mechanisms will improve a tank manufacturer's reputation, increase business sales, and assure environmental safety. The addition of this knowledge will also instill consumer confidence in an industry that is considered to lack refined manufacturing processes and proven quality controls. Such advancements are keys to making rotational molding a cutting-edge, technology-driven process that prepares industry for future growth and development. The purpose of this research is to provide tested empirical data and proven expert analysis that can be utilized by companies in understanding the failure mechanisms of these tanks. The information regarding this topic was collected from various tank samples taken from Poly Processing, a leading manufacturer of rotationally molded polyethylene chemical storage tanks and producer of the examined samples, and Odyssey Manufacturing, a manufacturer of bulk sodium hypochlorite and the end user of the examined samples. In the final chapter of this research, a summary is presented of the important findings regarding the purpose of the thesis study.
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Ståhlberg, Camilla. "Local Cooperation in Water Management : A Minor Field Study from South India." Thesis, Linköping University, Department of Water and Environmental Studies, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5859.
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Decentralized development approaches have in recent years gained wide acceptance in policy circles. In India the national and the state
governments have for a long time undertaken the primary responsibility for water management. In recent years however, there has been a clear shift of policy towards increased reliance on the local communities. This thesis deals with the capacity of rural communities in India to manage their water resources in a sustainable way.
Through a case study of water management in a South Indian village opportunities and barriers for rural communities in India to manage their water resources in a sustainable way is analysed. The thesis deals with both formal and informal institutions involved in the water management.Factors that can promote and obstruct locals’ contribution in water management are discussed. Also the role of external actors such as NGOs, the Panchayats and the government is dealt with, and how they may facilitate a development towards sustainability and increased locals’ contribution in order to achieve a sustainable community bases water management.
Theories on collective action and the commons have been used in the analysis. These theories deal with how to get people to cooperate regarding the management of common resources such as water in order to achieve higher collective benefits. The study is primarily based on 66 semistructured qualitative interviews with local water users in a village in Andhra Pradesh.
Decentralized development approaches have in recent years gained wide acceptance in policy circles. In India the national and the state
governments have for a long time undertaken the primary responsibility for water management. In recent years however, there has been a clear shift of policy towards increased reliance on the local communities. This thesis deals with the capacity of rural communities in India to manage their water resources in a sustainable way.
Through a case study of water management in a South Indian village opportunities and barriers for rural communities in India to manage their water resources in a sustainable way is analysed. The thesis deals with both formal and informal institutions involved in the water management.Factors that can promote and obstruct locals’ contribution in water management are discussed. Also the role of external actors such as NGOs, the Panchayats and the government is dealt with, and how they may facilitate a development towards sustainability and increased locals’ contribution in order to achieve a sustainable community bases water management.
Theories on collective action and the commons have been used in the analysis. These theories deal with how to get people to cooperate regarding the management of common resources such as water in order to achieve higher collective benefits. The study is primarily based on 66 semistructured qualitative interviews with local water users in a village in Andhra Pradesh.
The ISRN in the pdf-file is incorrect. The correct ISRN is shown below.
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Smith, Stephanie. "An evaluation of the physical and demographic characteristics contributing to on-site sewage management system failure in metropolitan Atlanta, Georgia." Thesis, Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55041.
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When designed, installed, and maintained properly, septic systems provide a cost-effective and environmentally-sound method to treat domestic wastewater. However, poor installation, unsuitable site conditions, and infrequent maintenance can lead to system failure and the discharge of partially-treated effluent to local waterways. As many as 1%, or 4,000 systems, fail each year in the Atlanta area. Therefore, the purpose of this paper is to evaluate what social and physical factors are significant to the location of on-site sewage management system failures in Cherokee County, Georgia. A regression analysis of the septic system failure rate, which was estimated with repair permit records from the local Board of Health, with Census demographics, soil, and septic system information found that the percent of soils in the “A” hydrologic group, unemployment rate, percent African-American population, population density, household size, percent of homes built between 1980 and 1989, percent built between 1970 and 1979, percent built between 1940 and 1949, and the average lot size of the parcels issued a repair permit were statistically-significant (p < 0.05) indicators of the failure rate at the Census block group level. The inclusion of socioeconomic, environmental, and physical characteristics suggests that the most effective response to reduce failures will incorporate actions to address these significant elements collectively. Despite restrictions on the ability of the Georgia Department of Public Health to regulate maintenance, many policy options are available to proactively identify areas with the greatest likelihood of failure and reduce the incidence of failure in those areas. Greater collaboration between stakeholders, including the county Board of Health and utility providers, improved record-keeping, and education and incentive programs provide the best opportunities to improve the management of septic systems in local jurisdictions.
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Barcelos, Juvenal Caetano de. "Desempenho da beterraba 'katrina' submetida a lâminas de água e doses de nitrogênio aplicadas via fertirrigação /." Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/105309.
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Orientador: José Renato ZaniniBanca: Luis César Dias Drumond
Banca: Elias Nascentes Borges
Banca: Luiz Carlos Pavani
Banca: Leila Trevizan Braz
Resumo: A cultura da beterraba é bastante susceptível às deficiências hídricas, ocasionadas pela má distribuição das chuvas, visto que as hortaliças constituem um grupo de culturas que têm mais de 80% de água em sua composição. O experimento foi realizado na área do campo experimental do Instituto Federal de Educação, Ciências e Tecnologia do Triângulo Mineiro - Câmpus Uberlândia (IFTM), situado a 18º45'53" Sul, 48º17'20" Oeste e altitude de 620 metros, com clima tipo Cwa (Köeppen). O objetivo deste trabalho foi avaliar o desempenho quanto à produtividade e qualidade da beterraba cultivar Katrina', em função de quatro lâminas diárias de irrigação, e quatro doses de nitrogênio, aplicadas por fertirrigação, no município de Uberlândia, Minas Gerais. O delineamento experimental foi em blocos, com parcelas subdivididas, compostas por lâminas de irrigação, correspondentes a 50, 75, 100 e 125% da evapotranspiração da cultura com base no tanque classe A, e doses de adubo nitrogenado, correspondentes a 50, 75, 100 e 125% da dose recomendada pelo cálculo da adubação, com base nas recomendações para o uso de corretivos e fertilizantes do Estado de Minas Gerais. Na cultura da beterraba não ocorreu efeito significativo para as lâminas de irrigação e para as doses de adubação, evidenciando que é uma espécie rústica, podendo ser cultivada sem grandes investimentos. O consumo de água pelo manejo de irrigação apresentou-se altamente interessante pelo fato de que não houve acréscimo de produção com o aumento das lâminas de irrigação, possibilitando o cultivo com lâminas menores, do que a lâmina correspondente a 100% da evapotranspiração da cultura com base no tanque classe A, proporcionando economia de água e menor impacto ao meio ambiente
Abstract: The culture of the beet (Beta vulgaris L.) is highly susceptive to hydric deficiency, caused by the rains' bad distribution, once the vegetables group of cultures has more than 80% of water in its composition. The experiment was carried out at the experimental field area, Instituto Federal de Educação, Ciências e Tecnologia do Triângulo Mineiro, Câmpus Uberlândia (Federal Institute of Education, Sciences and Technology of the Triângulo Mineiro, Uberlândia Câmpus - IFTM, Brazil), latitude 18º45'53'' south, longitude 48º17'20'' west, altitude 620 meters, with a Cwa climate (Köeppen). This work aimed the 'Katrina' beet productivity and quality performance under four irrigation depths and four nitrogen levels applied by fertirrigation in Uberlândia city, Minas Gerais state. The experimental design was a split pot blocks, composed by 50, 75, 100, and 125% of the class-A tank beet evapotranspiration and 50, 75, 100, and 125% of the recommended nitrogen levels to beet, based on the Minas Gerais state recommendation. The beet culture did not present significant effect neither to the irrigation depths nor to the nitrogen levels, showing that it is a rustic specie and it can be cultivated with minimal investments. The water consumption by the management presented highly interesting because the increased water depth did not increased the production, generating cultivate beet in smaller water depths than the 100% class-A tank evapotranspiration depth, providing higher water economy as well smaller environmental impact
Doutor
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Danilovic, Milisav. "Active Source Management to Maintain High Efficiency in Resonant Conversion over Wide Load Range." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/76618.
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High-frequency and large amplitude current is a driving requirement for applications such as induction heating, wireless power transfer, power amplifier for magnetic resonant imaging, electronic ballasts, and ozone generators. Voltage-fed resonant inverters are normally employed, however, current-fed (CF) resonant inverters are a competitive alternative when the quality factor of the load is significantly high. The input current of a CF resonant inverter is considerably smaller than the output current, which benefits efficiency. A simple, parallel resonant tank is sufficient to create a high-power sinusoidal signal at the output. Additionally, input current is limited at the no-load condition, providing safe operation of the system. Drawbacks of the CF resonant inverter are associated with the implementation of the equivalent current source. A large input inductor is required to create an equivalent dc current source, to reduce power density and the bandwidth of the system. For safety, a switching stage is implemented using bidirectional voltage-blocking switches, which consist of a series connection of a diode and a transistor. The series diode experiences significant conduction loss because of large on-state voltage. The control of the output current amplitude for constant-frequency inverters requires a pre-regulation stage, typically implemented as a cascaded hard-switched dc/dc buck converter. The pre-regulation also reduces the efficiency.
In this dissertation, a variety of CF resonant inverters with two input inductors and two grounded switches are investigated for an inductive-load driver with loaded quality factor larger than ten, constant and high-frequency (~500 kHz) operation, high reactive output power (~14 kVA), high bandwidth (~100 kHz), and high efficiency (over 95 %). The implementation of such system required to question the fundamental operation of the CF resonant inverter. The input inductance is reduced by around an order of magnitude, ensuring sufficient bandwidth, and allowing rich harmonic content in the input current. Of particular importance are fundamental and second harmonic components since they influence synchronization of the zero-crossing of the output voltage and the turn-on of the switches. The synchronization occurs at a particular frequency, termed synchronous frequency, and it allows for zero switching loss in the switches, which greatly boosts efficiency. The synchronous conditions were not know prior this work, and the dependence among circuit parameters, input current harmonics, and synchronous frequency are derived for the first time. The series diode of the bidirectional switch can reduce the efficiency of the system to below 90 %, and has to be removed from the system. The detrimental current-spikes can occur if the inverter is not operated in synchronous condition, such as in transients, or during parametric variations of the load coil. The resistance of the load coil has a wide variance, five times or more, while the inductance changes as well by a few percent. To accommodate for non-synchronous conditions, a low-loss current snubber is proposed as a safety measure to replace lossy diodes. The center-piece of the dissertation is the proposal of a two-phase zero-voltage switching buck pre-regulator, as it enables fixed frequency and synchronous operation of the inverter under wide parametric variations of the load. The synchronous operation is controlled by phase-shifting the switching functions of the pre-regulator and inverter. The pre-regulator reduces the dc current in the input inductors, which is a main contributor to current stress and conduction losses in the inverter switches. Total loss of the inverter switches is minimized since no switching loss is present and minimal conduction losses are allowed. The dc current in the input inductors, once seen as a means to transfer power to load, is now contradictory perceived as parasitic, and the power is transferred to the load using a fundamental frequency harmonic! The input current to the resonant tank, previously designed to be a square-wave, now resembles a sine-wave with very rich harmonic content. Additionally, the efficiency of the pre-regulator at heavy-load condition is improved by ensuring ZVS for with an additional inductive tank.
The dissertation includes five chapters. The first chapter is an introduction to current-fed resonant inverters, applications, and state-of-the-art means to ensure constant frequency operation under load's parametric variations. The second chapter is dedicated to the optimization of the CF resonant inverter topology with a dc input voltage, two input inductors, and two MOSFETs. The topology is termed as a boost amplifier. If the amplifier operates away from the synchronous frequency, detrimental current spikes will flow though the switches since the series diodes are eliminated. Current spikes reduce the efficiency up to few percent and can create false functioning of the system. Operation at the synchronous frequency is achieved with large, bulky, input inductors, typically around 1-2 mH or higher, when the synchronous frequency follows the resonant frequency of the tank at 500 kHz. The input inductance cannot be reduced arbitrarily to meet the system bandwidth requirement, since the synchronous frequency is increased based on the inductance value. The relationship between the two (input inductance and the synchronous frequency) was unknown prior this work. The synchronous frequency is determined to be a complicated mathematical function of harmonic currents through the input inductors, and it is found using the harmonic decomposition method. As a safety feature, a current snubber is implemented in series with the resonant tank. Snubber utilizes a series inductance of cable connection between the tank and the switching stage, and it is more efficient than the previously employed series diodes. Topology optimization and detailed design procedure are provided with respect to efficiency and system dynamics. The mathematics is verified by a prototype rated at 14 kVA and 1.25 kW. The input inductance is reduced by around an order of magnitude, with the synchronous frequency increase of 2 %. The efficiency of the power amplifier reached 98.5 % and might be improved further with additional optimization. Silicon carbide MOSFETs are employed for their capability to operate efficiently at high frequency, and high temperature.
The third chapter is dedicated to the development of the boost amplifier's large signal model using the Generalized State-space Averaging (GSSA) method. The model accurately predicts amplifier's transient and steady-state operation for any type of input voltage source (dc, dc with sinusoidal ripple, pulse-width modulated), and for either synchronous or non-synchronous operating frequency. It overcomes the limitation of the low-frequency model, which works well only for dc voltage-source input and at synchronous frequency. As the measure of accuracy, the zero-crossing of the resonant voltage is predicted with an error less than 2° over a period of synchronous operation, and for a range of interest for input inductance (25 μH – 1000 μH) and loaded-quality factor (10 – 50). The model is validated both in simulation and hardware for start-up transient and steady-state operation. It is then used in the synthesis of modulated output waveforms, including Hann-function and trapezoidal-function envelopes of the output voltage/current.
In the fourth chapter, the GSSA model is employed in development of the PWM compensation method that ensures synchronous operation at constant frequency for the wide variation of the load. The boost amplifier is extended with a cascaded pre-regulator whose main purpose is to control the output resonant voltage. The pre-regulator is implemented as two switching half-bridges with same duty-cycle and phase-shift of 180°. The behavior of the cascaded structure is the same as of the buck converter, so the half-bridges are named buck pre-regulators. ZVS operation is ensured by putting an inductive tank between the half-bridges. Each output of half-bridges is connected to each of input inductors of the boost to provide the PWM excitation. Using the GSSA model, the synchronous condition and control laws are derived for the amplifier. Properties of the current harmonics in the input inductors are well examined. It is discovered that the dc harmonic, once used to transfer power, is unwanted (parasitic) since it increases conduction loss in switches of the boost. A better idea is to use the fundamental harmonic for power transfer, since it does not create loss in the switches. Complete elimination of the dc current is not feasible for constant frequency operation of the amplifier since the dc current depends on the load coil's resistance. However, significant mitigation of around 55 % is easily achievable. The proposed method improves significantly the efficiency of both the buck pre-regulator and the boost. Synchronous operation is demonstrated in hardware for fixed switching frequency of 480 kHz, power level up to 750 W, input voltage change from 300 V to 600 V, load coil's resistance change of three times, and load coil's inductance change of 3.5 %. Measured efficiency is around 95 %, with a great room for improvements. Chapter five summarizes key contributions and concludes the dissertation.Ph. D.
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Souza, Sebastião Batalha Pinto de. "Manejo de Matrizes e Acompanhamento da Biologia Reprodutiva da Pescada branca Plagioscion squamosissimus (Hackel, 1840) em Tanque- rede na Comunidade do Catalão no Município de Iranduba (Amazonas- Brasil)." Universidade Federal do Amazonas, 2009. http://tede.ufam.edu.br/handle/tede/2753.
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Previous issue date: 2009-05-27Fundação de Amparo à Pesquisa do Estado do Amazonas
The first time grow out and managing freshwater silver croaker, Plagioscion squamossimus, in cage culture was carried out from January to December 2008 near the confluence of Rio Negro and Rio Solimões on the margin of Catalão Island near Manaus, Amazonas, Brazil. A total of 130 silver croakers were captured on site and stocked in three culture cages, measuring 3 x 2 x 2m with a density of 3.6 fishes/m³. The first year mortality of captive fishes was 10.7%, while the initial stock had a mean size of 29.5 cm SL and weighed 536 g; the final mean size of 34.8 cm SL and weighed 812 g were obtained from 82 fish. Sex dimorphism was found in silver croakers during maturation. Pelvic and anal fins of female turned into bright pink and emitted distinct clicking sound from that of croaking in males. Sex ratio was two females for one male, but fishes greater than 37 cm SL were all females. Gonad Somatic Index was highest in February with an estimate fecundity of 243 thousand eggs for females 35cm. Results of the study constituted a technical basis for silver croaker cage culture, which can be put in practice for rural communities and a new strategy for aquaculture in the Amazon.
O primeiro estudo de cultivo e manejo de matrizes de pescada-branca (Plagioscion squamosissimus) em tanque-rede foi realizado na confluência das águas do rio Negro e Solimões na ilha do Catalão no período de janeiro a dezembro de 2008. Foram capturadas 130 pescadas selvagens nos arredores do experimento e estocadas em três tanques-rede com dimensões de 3x2x2m com densidade de 3,6 peixes/m³. Em um ano de cultivo houve apenas 10,7% de mortalidade, sendo o comprimento médio inicial de 29,5 cm (CP) e peso de 536g. Os peixes atingiram um comprimento médio final de 34,8 cm (CP) e peso de 812g em um lote de 82 matrizes. As pescadas-brancas apresentaram dimorfismo sexual durante a época reprodutiva, onde nas fêmeas as nadadeiras anais e pélvicas eram rosadas e uma produção de som diferenciado entre os dois sexos. A proporção sexual foi de duas fêmeas por macho, sendo comprimentos maiores que 37 cm atingidos por fêmeas. O período de maturidade baseado RGS apresentou o pico no mês de fevereiro. A fecundidade foi estimada em 243 mil ovos por fêmeas de 35 cm. Estes resultados constituem as bases técnicas para o cultivo de pescada-branca em tanque-rede com o intuito para implantação nas comunidades ribeirinhas como uma estratégia alternativa econômica na Amazônia Ocidental.
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Barcelos, Juvenal Caetano de [UNESP]. "Desempenho da beterraba 'katrina’ submetida a lâminas de água e doses de nitrogênio aplicadas via fertirrigação." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/105309.
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barcelos_jc_dr_jabo.pdf: 663348 bytes, checksum: aed1e0e6aee133afc0857b631a519d67 (MD5)A cultura da beterraba é bastante susceptível às deficiências hídricas, ocasionadas pela má distribuição das chuvas, visto que as hortaliças constituem um grupo de culturas que têm mais de 80% de água em sua composição. O experimento foi realizado na área do campo experimental do Instituto Federal de Educação, Ciências e Tecnologia do Triângulo Mineiro – Câmpus Uberlândia (IFTM), situado a 18º45’53” Sul, 48º17’20” Oeste e altitude de 620 metros, com clima tipo Cwa (Köeppen). O objetivo deste trabalho foi avaliar o desempenho quanto à produtividade e qualidade da beterraba cultivar Katrina’, em função de quatro lâminas diárias de irrigação, e quatro doses de nitrogênio, aplicadas por fertirrigação, no município de Uberlândia, Minas Gerais. O delineamento experimental foi em blocos, com parcelas subdivididas, compostas por lâminas de irrigação, correspondentes a 50, 75, 100 e 125% da evapotranspiração da cultura com base no tanque classe A, e doses de adubo nitrogenado, correspondentes a 50, 75, 100 e 125% da dose recomendada pelo cálculo da adubação, com base nas recomendações para o uso de corretivos e fertilizantes do Estado de Minas Gerais. Na cultura da beterraba não ocorreu efeito significativo para as lâminas de irrigação e para as doses de adubação, evidenciando que é uma espécie rústica, podendo ser cultivada sem grandes investimentos. O consumo de água pelo manejo de irrigação apresentou-se altamente interessante pelo fato de que não houve acréscimo de produção com o aumento das lâminas de irrigação, possibilitando o cultivo com lâminas menores, do que a lâmina correspondente a 100% da evapotranspiração da cultura com base no tanque classe A, proporcionando economia de água e menor impacto ao meio ambiente
The culture of the beet (Beta vulgaris L.) is highly susceptive to hydric deficiency, caused by the rains’ bad distribution, once the vegetables group of cultures has more than 80% of water in its composition. The experiment was carried out at the experimental field area, Instituto Federal de Educação, Ciências e Tecnologia do Triângulo Mineiro, Câmpus Uberlândia (Federal Institute of Education, Sciences and Technology of the Triângulo Mineiro, Uberlândia Câmpus – IFTM, Brazil), latitude 18º45'53'' south, longitude 48º17'20'' west, altitude 620 meters, with a Cwa climate (Köeppen). This work aimed the ‘Katrina’ beet productivity and quality performance under four irrigation depths and four nitrogen levels applied by fertirrigation in Uberlândia city, Minas Gerais state. The experimental design was a split pot blocks, composed by 50, 75, 100, and 125% of the class-A tank beet evapotranspiration and 50, 75, 100, and 125% of the recommended nitrogen levels to beet, based on the Minas Gerais state recommendation. The beet culture did not present significant effect neither to the irrigation depths nor to the nitrogen levels, showing that it is a rustic specie and it can be cultivated with minimal investments. The water consumption by the management presented highly interesting because the increased water depth did not increased the production, generating cultivate beet in smaller water depths than the 100% class-A tank evapotranspiration depth, providing higher water economy as well smaller environmental impact
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Sousa, Francielly Guieiro Gomes de [UNESP]. "Irrigação com água residuária em diferentes diluições e disponibilidade para a cultura do tomate cereja." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151663.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Devido a escassez da água no planeta, são considerados viáveis estudos que buscam alternativas para economia e melhor aproveitamento da água. Sendo assim a utilização da água de reúso para agricultura e o correto manejo da irrigação torna se uma possibilidade para minimizar o problema da falta de água. Perante isso o objetivo do presente trabalho foi avaliar o efeito de diferentes concentrações e disponibilidades de águas de esgoto doméstica tratado no desenvolvimento e produção do tomate cereja. O cultivo dos tomates foi conduzido na área experimental do Departamento de Engenharia Rural da Faculdade de Ciências Agronômicas da Universidade Estadual Paulista, Campus de Botucatu, no período de agosto a dezembro de 2015. O sistema de irrigação adotado foi localizado por gotejamento, sendo o manejo baseado no tanque classe A. O delineamento experimental foi em sistema fatorial (5x2) com parcelas subdivididas, onde adotou duas lâminas 70 e 100% da evapotranspiração da cultura, a água para os tratamentos foram, água de abastecimento e água de esgoto doméstico tratado com 4 diluições 25, 50, 75 e 100 de reúso, totalizando 10 tratamentos. As avaliações feitas foram: altura; diâmetro do caule; fitomassa verde e seca; teor relativo de água nas folhas (TRA); potencial de água nas folhas (Ψf); teor de nutrientes nas folhas; teor de nutrientes nos frutos; número de frutos maior e menor que 20 mm de diâmetro transversal, número total de frutos; peso total de frutos. Os dados coletados foram submetidos em análise de variância e as médias ao teste de tukey a 5 % de probabilidade. Os resultados mostraram que tanto as lâminas como as diluições de água de reúso tiveram efeitos significativos sobre os parâmetros agronômicos (altura, diâmetro, Ψf, fitomassa verde e seca, teor de nutrientes) no decorrer do desenvolvimento da cultura, porém para número de frutos, e peso total de frutos, a água de reúso não teve efeito significativo, a influência nesses parâmetros foi com relação as lâminas, plantas irrigadas com 100% da evapotranspiração independente da água utilizada obtiveram melhores produções. Os frutos de todos os tratamentos foram submetidos a análise microbiológica e mostraram que a água de reúso não causou nenhum tipo de contaminação.
Due to the scarcity of water on the planet, studies are considered feasible that seek alternatives for economy and better use of water. Therefore, the use of reuse water for agriculture and the correct management of irrigation makes it possible to minimize the problem of lack of water. Therefore, the objective of the present work was to evaluate the effect of different concentrations and availability of treated domestic sewage in the development and production of cherry tomatoes. Tomato cultivation was conducted in the experimental area of the Department of Rural Engineering of the Faculty of Agronomic Sciences of Universidade Estadual Paulista, Campus Botucatu, from August to September 2015. The irrigation system was located by dripping, the management based on the tank class A. The experimental design was in a factorial system (5x2) with subdivided plots, where it adopted two slides 70 and 100% of the crop evapotranspiration, the water for the treatments Were water supply and household sewage treated with 4 dilutions 25, 50, 75 and 100 of reuse, totaling 10 treatments. The evaluations were: height; Stem diameter; Green and dry biomass; Relative leaf water content (TRA); Leaf water potential (Ψf); Nutrient content in leaves; Nutrient content in fruits; Number of fruits larger and smaller than 20 mm of transverse diameter, total number of fruits; Total weight of fruits. The data collected were submitted to analysis of variance and the averages of the tukey test at 5% probability. The results showed that both slides and dilutions of reuse water had significant effects on the agronomic parameters (height, diameter, Ψf, green and dry biomass, nutrient content) during the development of the crop, but for number of fruits, And total weight of fruits, the reuse water had no significant effect, the influence in these parameters was with respect to the slides, plants irrigated with 100% of evapotranspiration independent of the water used obtained better yields. The fruits of all treatments were submitted to microbiological analysis and showed that the reuse water didn’t cause any type of contamination.
CNPq: 133284/2015-8
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Von, Keyserling Peter H. "Developing people through task management." Theological Research Exchange Network (TREN), 1990. http://www.tren.com.
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Takkinen, Juha. "From information management to task management in electronic mail." Doctoral thesis, Linköping : Univ, 2002. http://www.ep.liu.se/diss/science_technology/07/32/index.html.
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da, Costa Luciana B. "Epidemiology, Genetic and Molecular Characterization of Staphylococcus aureus in Ohio Dairy Farms." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408657108.
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Roland, Jason Howard. "Forced Convection Over Flat and Curved Isothermal Surfaces with Unheated Starting Length." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1418343439.
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ROSSETTO, SILVANA. "INTEGRATING ASYNCHRONOUS COMMUNICATION AND COOPERATIVE TASK MANAGEMENT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9197@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICONovos contextos da computação distribuída reforçam a necessidade de abstra ções de programação que favoreçam a comunicação assíncrona e o tratamento de tarefas concorrentes. Modelos de programação dirigido a eventos ou baseado em threads incorporam decisões sobre como tratar essas questões, em cada caso apresentando vantagens e desvantagens. Normalmente, a opção pelo modelo mais adequado para um determinado contexto ou problema exige que o programador lide diretamente com as desvantagens inerentes a esse modelo, tornando a tarefa de desenvolvimento de aplicações mais complexa. Nesse trabalho aprofundamos a discussão sobre como combinar as vantagens dos modelos tradicionais de programação para oferecer uma interface de programação mais simples para o programador. Exploramos o uso de operações de comunicação não- bloqueante e de um mecanismo básico de gerência cooperativa de tarefas baseado na construção de co-rotinas. Usando esses conceitos implementamos: (1) um conjunto de operações que facilitam o desenvolvimento de aplicações com a estrutura cliente/servidor sobre uma base de comunicação assíncrona; e (2) uma interface de programação mais apropriada para o TinyOS, o estado da arte em sistema operacional para redes de sensores.
New contexts of distributed computing emphasize the need of programming abstractions able to deal with asynchronous communication and concurrent tasks. Event-driven or threaded programming models are able to deal with these issues, but each model presents particular advantages and problems. Normally, when choosing the model more appropriate for a context or problem, the programmer must deal directly with the difficulties related to this model, making the development task more complex. In this work we discuss a way to combine the advantages of the traditional programming models in order to support a programming interface more suitable for the programmer.We explore asynchronous communication and cooperative task management based on the co-routine construction. By using these concepts, we implement: (1) a set of operations for building client/server applications upon an asynchronous communication basis; and (2) a more appropriate programming interface for TinyOS, the state of the art of operating system for sensor networks.
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Bortolini, Filipe. "Identificação de variáveis prevalentes para situações de stress em parques de tancagem: uma análise a partir das redes neurais artificiais." Universidade do Vale do Rio dos Sinos, 2015. http://www.repositorio.jesuita.org.br/handle/UNISINOS/5206.
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A melhoria no planejamento de operações é uma das preocupações constantes das refinarias de petróleo, e a gestão eficiente dos estoques em parques de tancagem é um ponto fundamental nesse contexto. No entanto, são poucos os trabalhos que tratam especificamente deste assunto e as ferramentas de simulação existentes são caras e não refletem a realidade de muitas refinarias. A gestão ineficiente ou o dimensionamento inadequado dos parques de tancagem, por sua vez, podem gerar uma série de prejuízos. Um parque superdimensionado gera custos de gestão e manutenção, além dos custos do estoque. Um parque subdimensionado pode gerar perdas devido a desabastecimentos e degradação de produtos, entre outros. Às situações em que o subdimensionamento gera impactos na produção, com ou sem perdas financeiras, dá-se a denominação de stress em parques de tancagem. Esse trabalho descreve a implantação de uma ferramenta que possibilita a quantificação do stress em parques de tancagem. Essa quantificação é feita com o apoio de uma heurística baseada em dados relativos às movimentações, manutenções e níveis de estoque dos tanques. Também descreve a forma de cálculo de cinquenta e nove variáveis relacionadas às movimentações dos tanques. A influência que essas variáveis têm na formação de situações de stress foi analisada através do uso de redes neurais artificiais. Essa influência foi quantificada em cinco diferentes cenários, considerando-se a existência ou não de um ciclo de certificação de produto e a natureza das variáveis analisadas. Como resultado, identifica-se que as variáveis relacionadas ao tempo de esvaziamento, tempo de tanque parado em nível baixo e tempo de enchimento são as prevalentes na criação de situações de stress em parques de tancagem no contexto analisado. Também são mapeados e formalizados os fluxos dos algoritmos para determinação das etapas do ciclo de um tanque, e é definida uma fórmula para a determinação do nível de stress em um parque de tancagem em um determinado período de tempo.
The improvement in operations planning is a constant concern of oil refineries, and the efficient management of inventories in tank farm sites is a key point in this context. However, there are few studies that deal specifically with this issue and existing simulation tools are expensive and do not reflect the reality of many refineries. The inefficient management or improper sizing of tank farm sites, in turn, can generate significant financial losses. A oversized tank farm generates management and maintenance costs, in addition to inventory costs. An undersized tank farm can generate losses due to shortages and degradation of products, among others. The situations in which the undersizing generates impact in operations, with or without financial losses, is defined as stress in tank farm sites. The present study describes the implementation of a tool that allows the quantification of stress in tank farm sites. This measurement is made using a heuristic based on data on the inventory movimentation, maintenance status and inventory levels of the tanks. It also describes the calculation method of fifty-nine variables related to the movimentation of inventory. The influence of these variables on the formation of stress situations was analyzed using artificial neural networks. This influence was quantified in five different scenarios, considering whether or not a product certification cycle and the nature of the variables. As a result, it is identified that the variables related to emptying time, tank downtime at low level and fill time are prevalent in creating stressful situations in tank farm sites in the analyzed context. They are also mapped and formalized flows of algorithms to determine the stages of a tank cycle, and is defined a formula for determining the stress level in a tankage park at a given time.
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Sandberg, Jonas. "Kan inte alla samma språk? : Möjligheten till ett gemensamt GGIS på mekaniserade förband?" Thesis, Swedish National Defence College, Swedish National Defence College, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-766.
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Försvarsmakten har under de senaste åren gått igenom radikala förändringar, som fortfarande inte är klara. Samtidigt som fokus ligger på personalförsörjning samt annat så går den teknologiska utvecklingen framåt. Jag vill med denna uppsats belysa vad ett gemensamt geografiskt informationssystem skulle kunna innebära för chefer på en lägre nivå inom mekaniserade bataljoner. Med denna uppsatts vill jag skapa förståelse utav gemensamma geografiska informationssystem och vilka möjligheter de skulle kunna bidra med. I uppsatsen tar jag reda på om systemen skulle kunna underlätta för chefer i sitt ledarskap på slagfälten, likväl vilka effekter det stridstekniskt skulle kunna bidra med. Jag tar också reda på om Försvarsmakten med dagens materiell och teknologi kan uppbringa ett sådant system. Slutsatsen som dras är att Försvarsmakten inte med dagens materiell kan uppbringa ett sådant system, materielen är föråldrad och den främsta begränsningen är dataöverförningskapacitet. Andra slutsatser är att system som dessa underlättar för chefer ur flertalet perspektiv. Främst så skulle systemen kunna bidraga till högre stridseffektivitet och underlätta för så kallade mixade förband.
The Swedish Armed forces have under the past years gone through some radical changes and some of them are still going on. As focus is set on manpower, the technologic development moves forward. I want to highlight what a common graphical information system could mean to commanders on lower command level at mechanized units. With this essay I want to create an understanding of common geographical information systems and what opportunities it could help with. In the essay I will find out if the systems could favor commanders in their leadership on the battlefield, as well which effects it could have on battle tactics. I also find out if the Swedish Armed forces with today’s equipment could procure such a system. Conclusions of the essay is that the Swedish Armed forces cant with today’s equipment procure such an system, because of the equipments obsolete status and the prominent restriction is data transfer rate. Other conclusions are that systems like these favor commanders in several perspectives. Most prominent, could system like these contribute to higher battle efficiency and favor for mechanized- mixed unit types.
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Tan, Xubin. "Hardware runtime management for task-based programming models." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/664109.
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Task-based programming models allow programmers to express applications as a collection of tasks with dependences. They are simple to use and greatly improve programmability by using software runtimes to exploit task parallelism and heterogeneity over multi-core, many-core and heterogeneous platforms. In these programming models, the runtimes guarantee correct execution order by managing tasks using task-dependence graphs (TDGs). These runtimes are powerful enough to provide high performance with coarse-grained tasks although they impose overheads on the application execution to maintain all the information they need to do their work. However, as the current trend in processor architectures keeps including more cores and heterogeneity (in fact complexity) in the systems, coarse-grained parallelism is not enough to feed all the underlying resources. Instead, fine-grained tasks are preferable as they are able to expose higher parallelism in applications but the overheads introduced by the software runtimes under these conditions prevent an efficient exploitation of fine-grained parallelism. The two most critical runtime overheads are task dependence graph management and task scheduling to heterogeneous systems.
We propose a hardware architecture Picos, consisting of a hardware task dependence manager including nested task support, and a heterogeneous task scheduler, to accelerate the critical runtime functions for task-based programming models. With Picos, we aim at extending the benefit of these programming models into exploiting fine-grained task parallelism and heterogeneity. As a proof-of-concept, Three prototypes of Picos have been designed in VHDL and implemented in a System-on-chip platform consisting of regular ARM SMP cores and an integrated FPGA. They also have been analyzed with real benchmarks with OmpSs running and Linux on the platform.
The first prototype is a hardware task dependence manager, which has been implemented in a Xilinx Zynq 7000 series SoCs. It is connected to a 2-core ARM Cortex A9 processor, with bare-metal OS integration. With 24 simulated workers, and running real task-dependence analysis in Picos, it scales up to 21x speedup. The second prototype Picos++ extended Picos with an exciting new feature for nested task support in hardware. To the best of our knowledge, this is the first time that such a feature has been support fully in hardware task dependence managers. This prototype is fully integrated in not only hardware, but also with a State-of-the-Art parallel programming model, and with Linux. The third prototype includes both a hardware task dependence manager and a heterogeneous task scheduler. The heterogeneous task scheduler receives ready tasks from the task-dependence manager and then schedule them to hardware execution units that have the estimated earliest finish time. It is implemented in a Xilinx Zynq Ultrascale+ MPSoC chip. In a system with 4 threads and up to 15 HW accelerators, it achieves up to 16.2x speedup for real benchmarks, and saves up to 90% of energy.Los modelos de programación basados en tareas permiten a los programadores expresar las aplicaciones como una colección de tareas con dependencias entre ellas. Dichos modelos son simples de usar y mejoran enormemente la programabilidad. Para ello se valen del uso de una runtime que en tiempo de ejecución ayuda a explotar el paralelismo de las tareas cuando se ejecutan en plataformas multi-cores, many-cores y heterogéneas. En estos modelos de programación los runtimes garantizan la ejecución de las tareas en el orden correcto mediante el uso de gráficos de dependencias entre tareas (TDG). Actualmente, los runtimes son lo suficientemente potentes para proporcionar un alto rendimiento con tareas de granularidad gruesa a pesar de que para mantener toda la información que necesitan para hacer su trabajo, introducen un sobrecoste importante en la ejecución de las aplicaciones. El problema viene dado por la tendencia actual en arquitectura de computadores a seguir incluyendo más núcleos y heterogeneidad (de hecho, complejidad) en los sistemas de procesado con lo que el paralelismo de granularidad gruesa no es suficiente para alimentar todos los recursos. En estos entornos complejos las tareas de granularidad fina son preferibles ya que son capaces de exponer un mayor paralelismo de las aplicaciones. Sin embargo, con tareas de granularidad fina, los sobrecostes introducidos por los runtimes software son mayores debido a la necesidad de manejar muchas más tareas más rápido. En general los mayores sobrecostes introducidos por los runtimes son: la administración de los grafos de dependencias que relacionan las tareas y la gestión de las tareas en sistemas heterogéneos. Proponemos una arquitectura hardware, llamada Picos, que consiste en un administrador de dependencias entre tareas incluyendo soporte para tareas anidadas y planificación de tareas heterogéneas. La función principal de dicha arquitectura es acelerar las funciones críticas de los runtimes para modelos de programación basados en tareas. Con Picos, se pretende extender el beneficio de estos modelos de programación para explotar el paralelismo y la heterogeneidad ejecutando tareas de granularidad fina. Como prueba de concepto, tres prototipos de Picos han sido diseñado en VHDL e implementado en una plataforma System-on-chip que consta de varios núcleos ARM integrados junto con una FPGA, y ademas analizados con ejecuciones reales con OmpSs y con Linux. El primer prototipo es un administrador hardware de tareas con dependencias, que se ha implementado en un SoC Xilinx Zynq serie 7000. Está conectado a un procesador ARM Cortex A9 de 2 núcleos, e integrado con el SO. Con 24 núcleos simulados y realizando el análisis real de las dependencias entre tareas en Picos, obtiene hasta un 21x sobre las mismas ejecuciones usando el entorno software. El segundo prototipo, Picos++, amplió Picos incorporando el soporte para la gestión de tareas anidadas en hardware. Hasta donde llega nuestro conocimiento, esta es la primera vez que dicha característica ha sido propuesta y/o incorporada en un administrador hardware de dependencias entre tareas. El segundo prototipo está completamente integrado en el sistema, no solo en hardware, sino también con el modelo de programación paralelo y con el sistema operativo. El tercer prototipo, incluye un administrador y planificador de tareas heterogéneas. El planificador de tareas heterogéneas recibe dichas tareas listas del administrador de dependencias entre tareas y las programa en la unidad de ejecución de hardware adecuada que tenga el tiempo de finalización estimado más corto. Este prototipo se ha implementado en un chip MPSoC Xilinx Zynq Ultrascale+. En dicho sistema con cuatro núcleos ARM y hasta 15 aceleradores HW funcionales, logra una aceleración de hasta 16.2x, y ahorra hasta el 90% de la energía con respecto al software.
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Sharif, Muddsair. "To-Do Map- Location Focused Task Management Framework." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-17242.
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Roberts, Adam C. "Brain markers of executive control in task management." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556981.
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The primary goal of the empirical research outlined in this thesis was to examine the role of the central executive in task management using EEG imaging methods. To achieve this goal, a series of experiments were conducted in order to determine decrements during complex task performance, and explore the relative contributions of executive fatigue and task load in the onset of compensatory control mechanisms which are said to manage goal directed activity. These experiments were based around a theoretical framework of neural correlates of Compensatory Control, drawing on evidence from imaging and psychophysiological studies. A laboratory-based complex process control task (aCAMS) was used to investigate the control of various life support systems, such as oxygen, pressure, carbon dioxide, humidity, and temperature in a simulated spaceship environment. The results of the automatic control experiment revealed no effect of fatigue, implicating a high level of goal protection. However, the results of the manual control experiment showed changes in many psychophysiological measures with load, with high inter-individual differences indicating the presence of different task strategies across operators. The results of more detailed analysis showed that, upon the examination of short-term changes, prefrontal theta response dropped in relation to task error reflecting a re-evaluation of task goals, and that this could be predicted based on the combination of prefrontal theta response and sub-optimal control strategies. The third and fourth experiments modified the task's primary operational criteria using adaptive automation, and found that it provided benefits in task performance, and automation interventions - changes in the level of automation, produced improved operator performance at individual levels of load. Taken together, these results demonstrate a number of ways that adaptive automation can be developed using psychophysiological markers of executive function.
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Tidmus, Jonathan Paul. "Task and data management for parallel particle tracing." Thesis, University of the West of England, Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387936.
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Kamsin, A. "Improving tool support for Personal Task Management (PTM)." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1450430/.
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Personal Task Management (PTM) describes the planning, prioritising and list-making of tasks employed by an individual user. There are hundreds of commercial electronic PTM tools available on the market which users can choose from. There appears to be little attempt to develop a framework for describing people’s task management behaviour, making it difficult to determine the extent to which these tools meet users’ needs. The aims of this thesis were therefore to understand how academics manage their tasks, to identify the conceptual gaps between them and the existing electronic tools, and to establish requirements for guiding the design and evaluation of PTM tools. The research adopts a user-centred design methodology. This includes both empirical and analytical approaches, conducted through four different studies. Firstly, a semi-structured interview study develops a PTM framework, describing the components of PTM (i.e. the underlying activities and contextual factors). Secondly, a member-checking study tests the accuracy of the framework. Thirdly, a video-diary study examines the inconsistencies discovered between the interview and member-checking studies. The findings extend the PTM framework to include other aspects of users (e.g. challenges, context awareness, etc.), broadening the understanding of the complexity of PTM behaviours. The data gathered in the user studies was analysed using a grounded theory (GT) approach, and the findings were then used to build personas of academics. Finally, an in-depth expert analytical evaluation of a set of existing tools using CASSM identifies the conceptual misfits between users and the existing tools. The contributions of this thesis are a development of the PTM framework, describing the key factors that influence academics in managing their tasks; a development of personas, explaining characteristics of different groups of academics and PTM strategies that they employ over time; and an evaluation of existing PTM tools, determining their strengths and limitations and providing recommendations.
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Jolaoso, Sheriff Olayinka. "TaskAmbient: A Study in Personal Task Management Visualization." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52782.
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In personal task management, individual tasks are susceptible to failure at various stages due to failures in prospective memory, information fragmentation, and/or cognitive overload. To alleviate the troubles that occur in personal task management, people use various tools such as notifications and external memory aids, but there is still room for improvement in regards to maintaining distributed cognitive artifacts such as calendars and to-do lists. Improvement in staying abreast of this personal task information as opposed to being alerted of it in individual instances was the topic of exploration in this work.
TaskAmbient is an ambient information display system that was designed to address these problems. TaskAmbient supports retention of individual task knowledge as well as retention of task knowledge in a user's different areas of responsibility. With this tool, I observed usage to verify or deny its ability to support prospective memory and combat the problems associated with information fragmentation and cognitive overload in respect to personal task management.
In this research, studies were conducted to learn about personal task management practices and how TaskAmbient was used. In conducting these studies, I found that TaskAmbient provided value in retaining task information and staying aware of tasks in a user's various areas of responsibility. TaskAmbient showed the extendibility to other domains of personal information management.Master of Science
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Mshololo, Felix Hlanganani Engelbert. "The time management task of the school principal." Thesis, University of Zululand, 2014. http://hdl.handle.net/10530/1408.
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A thesis submitted to the Faculty of Education in partial fulfilment of the requirements for the Degree of Master of Education in the Department of Social Science Education at the University of Zululand, South Africa, 2014Effective time utilisation leads to greater freedom to use time as one would like to: to do more of the things one has always wanted to do; in short to enjoy life more. Like in any other business organisation, time for planning, organising, leading and controlling is managed carefully. The principal needs time to perform all the above mentioned tasks. In this study, the author accentuates that it is disconcerting that from time to time, there are schools that do not even have a time table when the schools open at the beginning of the year. It would be interesting to know how much time might be wasted as a result of a lack of planning, lack of priorities, paperwork and reading, meetings, unclear objectives, procrastination, lack of delegation, incompetent subordinates and many other time wasters. The purpose of the study was to determine the school principal’s understanding of the time management task and explore how effective school principals manage time in performing their different tasks. Fifty principals from Phumelela and Umbumbulu Circuits, under the Umlazi District completed a survey questionnaire and semi structured interviews were conducted. The researcher was able to determine the pattern of time usage. The findings revealed that factors hampering time management include among other things meetings that principals have to attend, departmental expectations, visitors, the organisational stress, administrative obligations and inability to differentiate between urgent and important matters to attend to hampers the principal’s time management tasks. The study among other things recommended that the provincial education departments need to provide appropriate training for school governing bodies that a well organised and goal directed system should operate to control school visitors in the schools’ interest.
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Winkler, Tomáš. "Optimalizace plánování úkolů pro management pomocí Sharepoint." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234917.
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The problem discussed in this thesis is the optimization of the process of planning, tracking and evaluating tasks in the management area of the department Corporate Technology in Siemens, Brno. Having studied theories of CMMI and principles of ISO 9001, the given process is optimized by automating certain manual tasks. As Corporate Technology uses a SharePoint server to manage tasks, the application is developed to improve his functionality. This application has therefore been tested in the environment of the organization with real-life data and complies to all necessary requirements to be able to save at least 50 % of time in the optimized process. The results of this thesis prove the usability of automating manual repetitive tasks being conducted in the processes of the organization and introduce possibility of increasing process level by preventing human errors.
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Kigombe, Novetha [Verfasser]. "On the management of Theatre Groups in Urban Tanzania / Novetha Kigombe." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1117028410/34.
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Lo, Yuet Mei. "Business process atomicity analysis supporting late task property bindings /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?COMP%202005%20LO.
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Javed, Sammar. "An empirical investigation into knowledge management in Pakistani think tanks." Thesis, University of Huddersfield, 2017. http://eprints.hud.ac.uk/id/eprint/34421/.
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Knowledge management can play a central strategic role in organisational life, potentially initiating from strategy planning to performance achievement. The continuous adjustment of organisational strategy and performance can be powerful in knowledge intensive organisations such as think tanks. Think tanks are policy research organisations, usually of small to medium size, and non-profit in nature. The Pakistani think tank ‘industry’ is at an important tipping point in terms of establishing knowledge ‘impact’ for the state and the wider society. Think tank organisations are gaining dual attention for creating awareness in society and suggesting policies to the state. The central purpose of this research is to provide an explanation of why and how knowledge management plays a role within think tanks, especially with regards to organisations linking strategy and performance. It also seeks to provide evidence from Pakistani think tanks providing suggestions for organisational improvement that may be applicable to think tanks in other developing countries. A thorough literature review from the field of knowledge management includes knowledge, knowledge management, and the strategic relationship of knowledge management, organisational strategy and organisational performance. Specifically, the research seeks to analyse knowledge management in social sciences policy research think tanks based in Islamabad, the capital of Pakistan. The participation of eight think tanks provided access for field visits to conduct interviews, observations and document collection. From the findings, it is recommended that consciousness towards knowledge management can highlight the natural and independent process to keep organisational strategy and performance improving continuously in a cyclic manner. Knowledge resources with Pakistani think tanks demand proper recognition and valuation, as they are potentially being worth more compared to material resources. Amongst the knowledge resources, cultural values and norms, multilingual skills, ‘friendly’ internal environments and leadership are found to be important. The strength of Pakistani think tanks is in their Relational Capital, which they appear to be utilising. Informal-Tacit knowledge management practices are highlighted more in the context, though gaps do appear to exist for formal practices. It is suggested that think tanks could further enhance real visibility through their Relational Capital and making use of tacit informal practices leading to friendly, multilingual and effectively leadership cultures with positive values. Think tanks have the potential to help provide solutions during turbulent times, both leading and managing knowledge – effecting a positive impact upon both state and society.
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Valle, Carla. "Decision follow up using task management and semi-structured messages." Aachen Shaker, 2007. http://d-nb.info/1001755367/34.
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Du, Toit Anna. "Group work in management education - the role of task design." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9541_1256551831.
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This theses examined adult learners' experiences of group work in management education. Group work is an integral part of learning and teaching methods at most business schools because it develops team skills demanded by today's workplace. Furthermore, group work in education is grounded in the belief that much learning happens through social interaction and that diversity within groups promotes learning. This study analysed learners' group experiences in a business school. The study also aimed to identify conditions that hinder and promote group interaction with a view to enhance learning.
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Dierijck, Jillian Katrina. "Multiple concussions and dual task paradigms : reactive postural perturbation management." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63203.
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Sport-related concussion has received increasing concern and research in the last 20 years. Despite much research being done in the acute phase, chronic disturbances as a result of multiple concussions have received notably less attention. Moreover, these long-term difficulties as a result of multiple concussions have the capacity to influence the future of the athletes sporting career as well as their day-to-day functioning. Of particular interest is the impact of multiple concussions on balance. While studies of quiet stance balance are informative, they do not challenge the postural control system as contact sport game-play does. Therefore, the purpose of this study was to evaluate the influence of multiple previous concussions on the ability to manage external perturbations (analogous to pushes and tackles) under varying attentional demands. A group of contact-sport athletes who have never had a concussion (n=16) and a group of contact sport athletes who have been exposed to two or more concussions (n=16) were recruited. Participants completed a button press task, an arm reaching task with unexpected external perturbations, and both tasks simultaneously. A 2×2 mixed model ANOVA was used to assess for the main effects of task (single vs. dual) and concussion history (zero vs. two or more). Dependent variables included aspects of centre of pressure (COP; displacement and velocity), hand kinematics (displacement and velocity), and reaction time. Under dual-task conditions performance decreased on a number of variables including COP, hand kinematics, and reaction time. Moreover, the group with multiple previous concussions performed significantly worse, particularly in COP metrics compared to the group who have no concussion history. These findings indicate a history of concussion alters COP metrics (postural control). Furthermore, these findings highlight the potential use of this novel task (combining external perturbations and a secondary attention task) in concussion assessment and return-to-play decision making. Taken together, the current findings add crucial information to the impact of concussion on postural control. Given this information, interventions need to be designed and implemented to mitigate the chronic disturbances to balance (that could influence the future sporting career and day-to-day life) which may result from exposure to multiple concussions.Graduate Studies, College of (Okanagan)
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Bosch, Pons Jaume. "Breaking host-centric management of task-based parallel programming models." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672309.
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Heterogeneous platforms had become popular to increase the computational power of the systems within a constrained power budget. They are present in several systems, from embedded platforms and mobile devices to high-end servers and clusters.
However, the co-processors are managed following a master-slave model where the general-purpose CPU drives the rest of elements. This management limits the system possibilities as not all application parts are suitable to be executed in an accelerator. This thesis presents different proposals to enhance the usage of co-processors in task-based parallel programming models, which are a powerful tool to easily program applications for heterogeneous platforms.
The first proposal enhances the task-based systems with an asynchronous, concurrent, and parameterizable behavior. The improvements go across the full-stack, from the programming model level down to the low-level communications used between the libraries and the co-processors. The evaluation shows that the implemented improvements boost the applications' performance as they can be easily tuned for the running platform.
The second proposal adds support for task spawn and synchronization in co-processors. The offloaded tasks can create child tasks that target other architectures or remain inside the co-processor. This allows the programmers to implement applications easily and effectively. The evaluation shows the efficiency of the proposal implementation in terms of latency and power consumption. The results show that applications can increase their performance and optimize their power consumption just moving the task spawn from the host threads to the co-processor. This is thanks to the low-latency task management inside the co-processors, which also reduces the communications between the host and the co-processor.
The third proposal extends task-based programming models with concepts of recurrent workloads. The regular task syntax has been extended with new clauses to label the recurrent tasks and provide the needed information to the runtime. The evaluation shows an application programmability increase thanks to the new syntax, which allows the specification of recurrent systems with much less code and better accuracy. Also, the direct management of task repetitions and periods in the co-processors allows an almost zero-latency management that is able to manage any task granularity.Els sistemes heterogenis s'han popularitzat, ja que permeten incrementar la potència de càlcul sense implicar un augment del consum energètic. Aquests sistemes van des de plataformes encastades i dispositius mòbils, fins a servidors i clústers d'altes prestacions. En tots ells, la gestió dels coprocessadors segueix el patró primari-secundari on la unitat de còmput general (CPU, per les seves sigles en anglès) dirigeix la resta d'elements. Aquesta gestió limita les possibilitats dels sistemes i limita les parts de les aplicacions que poden ser executades en els acceleradors. Aquesta tesi presenta diferents propostes per millorar l'ús dels coprocessadors dins dels models de programació paral·lels basats en tasques. Aquests models de programació són una eina molt potent que permet programar fàcilment aplicacions pels sistemes heterogenis. La primera proposta millora els models de programació basats en tasques mitjançant aproximacions asíncrones, concurrents i parametritzables. Les millores són a tots els nivells, des del model de programació fins a les comunicacions a baix nivell entre les llibreries i els coprocessadors. Els resultats de l'avaluació mostren que les millores augmenten el rendiment de les aplicacions perquè permeten adaptar-les fàcilment a les plataformes d'execució. La segona proposta afegeix suport per la creació de tasques i la seva sincronització dins dels coprocessadors. Les tasques enviades als coprocessadors poden crear tasques filles pel mateix coprocessador o per altres elements del sistema. Això flexibilitza i facilita la programació d'aplicacions. L'avaluació mostra l'eficiència de la proposta respecte a la latència i el consum d'energia. Els resultats revelen que les aplicacions poden incrementar el seu rendiment i optimitzar el seu consum energètic creant les tasques directament a dins dels coprocessadors. La millora es deu a la baixa latència de la gestió de tasques dins dels coprocessadors que també suposa una reducció de les comunicacions entre la CPU i el coprocessador. La tercera proposta amplia les capacitats dels models de programació basats en tasques introduint conceptes de sistemes recurrents. La sintaxi bàsica d'una tasca s'amplia amb noves clàusules per distingir les recurrents i proporcionar al runtime la informació necessària. L'avaluació de la proposta mosta una millora en la programabilitat de les aplicacions gràcies a la nova sintaxi. Aquesta permet la creació de sistemes recurrents amb menys codi i amb una precisió major. La gestió directa de les repeticions i períodes de les tasques recurrents dins dels coprocessadors resulta en una latència mínima que permet qualsevol granularitat de tasques.
Arquitectura de computadors
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Jobst, Johanna [Verfasser]. "Strategisches Management in Kulturorganisationen : eine empirische Analyse der Bewertung eines Theaterbesuchs aus Zuschauerperspektive / Johanna Jobst." Konstanz : Bibliothek der Universität Konstanz, 2012. http://d-nb.info/1053231229/34.
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Tovstokorenko, O. Y., R. O. Gamzayev, and M. V. Tkachuk. "Case-Based Recommender for intelligent task assignment in software development." Thesis, NTU "KhPI", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38049.
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Shrestha, Joseph. "Let's Talk About Roads." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/5476.
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Dr. Joseph Shrestha, Assistant Professor, ETSU Department of Engineering Technology shares that U.S. roads received a D-grade in the latest report card from American Society of Civil Engineers (ASCE). His presentation will discuss various aspects of U.S. roads; including funding sources, cost estimation, cost overruns, speed limits, and crash statistics.
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Negelspach, Greg L. "Grain size management in repetitive task graphs for multiprocessor computer scheduling." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA288575.
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Basran, Jagdeep S. "Agent-based management of a task-level multi-robot assembly cell." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0022/NQ32437.pdf.
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NAKAHAMA, YUKO. "Development of Referent Management in L2 Japanese : A Film Retelling Task." 名古屋大学大学院国際言語文化研究科, 2003. http://hdl.handle.net/2237/7872.
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Mitchell, Melissa. "Strategic human resource management plan for Task Applied Science (Pty) Ltd." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96217.
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Thesis (MBA)--Stellenbosch University, 2014.Human resource management is a widely researched field. However, the research done in terms of small to medium-sized enterprises, is extremely limited, especially in South Africa. The aim of this research was to investigate human resource management practices in one such a company, and to develop a feasible action plan to improve on these practices. The chosen company, Task Applied Science (Pty) Ltd, is a medical research company based in Cape Town, South Africa. The data for the study was obtained through a literature review and interviews. The data from the literature review identified best practices and frameworks. This was combined with interviewing company employees as well as HRM practitioners in the medical field to not only identify problems, but to also suggest possible solutions. These solutions were compiled in a comprehensive action plan. As such, the results offer a workable solution for Task Applied Science, and can serve as example for all small to medium-sized enterprises. The literature review further showed that smaller companies tend to ignore the importance of human resource management due to the time and costs involved and the fact that they are focussed on the external environment rather than the internal. This cannot simply be remedied by implementing practices developed in large companies. Best practices need to be customised to fit the needs of the specific company. The findings showed that only certain human resource management practices were implemented in reaction to crises, or as needs arose. This, combined with the rapid growth and lack of structure, caused a breakdown in communication, transparency, and trust. Staff loyalty decreased because they felt that they were left in the dark. Both the company strategy and values became vague, and thus staff could not be aligned to it. Noteworthy was that the increase in policies and documentation did not cause employees to feel restricted, but rather that it created a feeling of security. The study made it abundantly clear that the human resources department needs to be treated as a strategic partner in the planning and execution of the company strategy; especially in terms of efficient change management. Their role is to communicate the strategic direction, while at the same time acting as an activist for the staff, voicing their needs and capabilities. The proposed action plan focused mainly on the company culture and the alignment of staff with the company’s business strategy. This was done by addressing issues such as company culture, communication, company values, and staff development. The plan offers practical solutions within each of these categories. Furthermore, it suggests solutions in terms of efficient staff recruitment and knowledge management. By implementing this plan the company will be able to increase the synergy between the business units within the company, eradicating silos, and establishing the staff as a competitive advantage. In addition to this, it will establish the human resources department as a credible partner for the staff in developing both their personal and professional lives.
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Selleck, Claire D. "“We Just Didn’t Talk About It:” Strategies of Stigmatized Grief Management." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3900.
Full textAbstract:
This study explores the experiences of people who have lost loved ones due to socially stigmatized deaths. Drawing from eight individual interviews, the author argues that the stigma associated with death due to drug overdose, suicide, substance abuse, or murder can cause traumatic or prolonged grief and can complicate the way the bereaved talk about grief as a part of their healing process. With the mortality rate in the U.S. rising, there is an epidemic of disenfranchised grief affecting millions of bereaved individuals. Using Coordinated Management of Meaning and Communication Privacy Management theories, the author uncovers strategies the traumatically bereaved employ to manage interactions and relationships with others. A qualitative analysis of participant interviews revealed that social stigma, whether experienced or anticipated, affects the way the bereaved communicate and can cause self-silencing. Findings indicate a need for safe, supportive, and non-judgmental spaces for the traumatically bereaved to share their stories.