Dissertations / Theses on the topic 'Time management efficiency'
To see the other types of publications on this topic, follow the link: Time management efficiency.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Time management efficiency.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Butala, Caitlin Mary. "Connected factory: real time data analysis for manufacturing efficiency." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/126945.
Full textAbstract:
Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages [77]-[78]).
Pratt and Whitney is expecting an increase in demand for new engines and for parts supportive of aftermarket service, maintenance, and repair. To avoid expensive capital investments in additional production capacity, Pratt is taking several approaches to better utilize existing capacity. In a business where historically margins have been high, demand was flat, and in some years decreasing, and staffing had relatively low turnover, conditions were not forcing leaders to focus on identifying ways to eliminate waste or adapt cutting edge manufacturing analytics. With the introduction of new and innovative products, Pratt & Whitney is quickly approaching conditions where demand will outpace capacity. Additionally, demographics of the employee base has started to hit a point where many key and tenured employees have started to and will continue to retire leaving a knowledge gap behind.
To attack this growing problem, Pratt is taking several approaches to win more efficiency and effectiveness out of existing capacity. These include lean initiatives supported by connected and real time manufacturing technologies. Sensors and monitors are primarily used to gather data about machine condition and performance which is fed back to calculate Overall Equipment Effectiveness (OEE), a lean metric used to identify waste in the manufacturing process. The production team in Columbus has done a lot over the past few years to increase production, but as utilization rates increase, they are looking for new ways to expand capacity. The problem faced by management is identifying and reacting to losses as they occur, rather than retroactively, which is caused, in part, by inadequate access to the data.
This problem of reacting timely to losses is exacerbated by attrition of experienced workers who had tribal knowledge of the processes and how to react, whereas newer employees have not developed those reactionary instincts yet. Pratt & Whitney in Columbus has been collecting and storing data from their forge presses for years; accessing and analyzing that data in real time and integrating decision making based off that data has not been a part of their process. Using machine state tags, that is logic based off Programable Logic Controllers (PLCs) to tell users if the machine is in a run state, going through a changeover, or sitting idle, management can view the state of machines anywhere they can access the Pratt network. This data has also been used to calculate production efficiencies by part number by asset by calculating actual cycle times and comparing them to the engineering design time per part.
This is fed as an input to the new scheduling tool developed over the past few months which is meant to capture the intricacies of how different materials perform on different presses and optimize total production time by maximizing tool life among the presses. I have identified key inputs and business analytics processes to evaluate suboptimal efficiencies in the production process. This has affected the manner in which Pratt & Whitney in Columbus conducts business and permeated throughout the management structure to be included in events from daily production meetings all the way up to weekly executive report outs. Initial results show scheduling efficiency would improve output up to 8%, and the data has been utilized to uncover other areas for efficiency gains amounting to a 25% go get by the end of the year.
This research has shown that a data rich environment can present you with a vast array of opportunities if the data can be aggregated and interpreted timely enough to feed the decision-making process of production and if the organization has a culture to embrace it.
by Caitlin Mary Butala.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering
2
Yang, Simei. "Run-Time Management for Energy Efficiency of Cluster-Based Multi/Many Core Systems." Thesis, Nantes, 2020. http://www.theses.fr/2020NANT4004.
Full textAbstract:
Les plates-formes multi/multi-cœurs organisées en clusters représentent des solutions prometteuses pour fournir des performances de calcul élevées et une efficacité énergétique optimisée dans les systèmes embarqués modernes. Ces plates-formes prennent souvent en charge la gestion dynamique tension/fréquence (DVFS) par cluster, ce qui permet à différents clusters de modifier leurs propres niveaux tension/ fréquence indépendamment. La complexité et le dynamisme croissants des applications sur ces plates-formes rendent nécessaire la gestion en ligne des ressources. Ce mémoire se concentre sur les méthodes de gestion en ligne des applications sur des systèmes multi/multi-cœurs en cluster pour améliorer l'efficacité énergétique. Cette thèse présente différentes stratégies de gestion qui permettent d'estimer l'influence mutuelle entre l'allocation des applications et la configuration en tension/fréquence des clusters afin d'obtenir respectivement une optimisation locale au sein d'un cluster et une optimisation globale dans l'ensemble du système. Les stratégies proposées permettent d'obtenir des solutions de gestion optimisées avec moins de complexité que les stratégies existantes. De plus, cette thèse présente une nouvelle approche de modélisation et de simulation qui permet d'évaluer les stratégies de gestion en ligne dans les systèmes multi/multi-cœurs pour garantir que les contraintes du système sont pleinement respectées. L'approche de simulation proposée est validée à l'aide d'un cadre de modélisation et de simulation industrielleCluster-based multi/many-core platforms represent promising solutions to deliver high computing performance and energy efficiency in modern embedded systems. These platforms often support per-cluster Dynamic Voltage/Frequency Scaling (DVFS), allowing different clusters to change their own v/f levels independently. The increasing application complexity and application dynamism on such platforms arise the need for run-time management. This dissertation focuses on the run-time management of applications on clusterbased multi/many-core systems to improve energy efficiency. Towards the run-time management purpose, this dissertation presents different management strategies that estimate the mutual influence between application mapping and cluster v/f configurations to respectively achieve local optimization within a cluster and global optimization in the overall system. The proposed management strategies can achieve near-optimal management solutions with less strategy complexity compared to state-of-theart strategies. ln addition, this dissertation presents a new modelling and simulation approach that allows the evaluation of run-time management strategies in multi/many-core systems to guarantee that system constraints are fully met. The proposed simulation approach is validated using an industrial modelling and simulation framework
3
ALM, RAGNAR, and RUDY KYRÖNLAHTI. "Take time to make time : What to consider when managing multi-channel sales systems with the objective to increase sales efficiency." Thesis, KTH, Industriell Marknadsföring och Entreprenörskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199187.
Full textAbstract:
Traditional sales systems have been disrupted by technological developments. In order to adapt, companies are changing the way they interact with their customers in business-to-business markets. In the last three decades, multi-channel strategies have spurred the proliferation of different sales channels and new ways of managing sales systems. The purpose of this research was to investigate what should be considered when managing multi-channel sales systems with the objective of increasing sales efficiency. The study has investigated current utilisation of multi-channel sales systems in the context of a business-to-business setting in industrial companies that are involved in the Swedish automotive industry. Multi-channel sales systems can be utilised to achieve many different objectives. However, this research pays specific attention on how to improve sales efficiency by utilising multi-channel sales systems in the context of a business-to-business setting. The research employed an explorative case study, where semi-structured and structured interviews were conducted at a case company and at companies that are first or second tier suppliers in the Swedish automotive industry. The qualitative data were analysed using thematic analysis. The empirical findings indicate that the most prevalent measure for increasing sales efficiency is to prioritise and allocate customers based on economic attractiveness. Furthermore, the key issues that impede sales efficiency in multi-channels sales system are misaligned sales activities, deficient prioritisation procedures, insufficient promotion of customer value and inadequate focus on customers. The findings highlight key areas to address and may provide guidelines for the design and management of multi-channel sales systems with the specific purpose of obtaining sales efficiency. The implications of this research are mainly practical and are aimed at supporting sales managers, or individuals in similar positions engaged in multi-channel sales system design and management, in obtaining sales efficiency. Managers should focus on aligning sales activities across the whole sales system, allocate customers according to prioritisation and stay in line with market developments by understanding customer behaviours and perceptions.
4
Barlas, Sofia, and Sofie Johansson. "Management and leadership within the FFE : Management-and leadership effects on time efficacy within the Fuzzy Front End of the New Product Development process." Thesis, Högskolan i Jönköping, Internationella Handelshögskolan, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-39805.
Full textAbstract:
Today's fast-paced and increasingly competitive market has added pressure on companies and NPD-teams to improve both the quality of the products they provide, as well as the speed in which the products are introduced to the market. The main purpose within this study was to investigate two research questions; (a) How can various management- and leadership styles improve time efficacy without impairing the successes of the FFE of the NPD process; and (b) How can/does the uncertainty within the FFE affect project managers within the NPD process?Qualitative methods have been used within this study to gain a greater understating of the tasks and activities management have applied within the FFE to reduce and save time. A multiple case study, in the form of interviews, was performed in order to obtain raw empirical data. Eight interviews were conducted with individuals whom possessed managerial roles such as project managers, within the NPD process. The information was later analyzed and evaluated with the help of a thematic analysis.The main findings within this thesis contradict previous studies and literature which state the need for “more time” within the FFE of the NPD process. The result within this study suggest that project managers do not seek to extend the time provided within the FFE, rather identify task and methods which can enable them to use the time afforded wisely and efficiently. The managers do not seek to eliminate any tasks or activities; however, they do wish to identify less relevant activities in order to spend more time on valuable and beneficial tasks which increase the likely-hood of developing high quality products.
5
Landis, Jordan Riley. "Benchmarking environmental efficiency of garment factories to understand the value of real-time environmental data." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/126906.
Full textAbstract:
Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, in conjunction with the Leaders for Global Operations Program at MIT, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 84-86).
Li & Fung works with over 10,000 factories distributed across 50 countries to design, produce, and deliver hard- and soft- goods to over 2,000 apparel and consumer goods customers. An increasingly prevalent focus of the industry, driven both by regulation and consumer preferences, is to measure, benchmark, and reduce the overall environmental impact of the supply chain. Currently the measurement mechanisms in place rely on a traditional two-phase approach involving factory self-reporting and verification via independent audits. The scope of this project is to assess the efficacy of currently available measurement data in order to inform the requirements for real-time collected data. This project will be broken into four phases. First, existing industry data sources will be described and evaluated in order to assess data quality, understand requirements, and provide recommendations for future data collection. Second, the features of the data will be analyzed in order to develop an understanding of the underlining relationships. Third, using a set of selected features from the second phase, a predictive clustering algorithm for factory-level resource efficiency will be developed and used to benchmark factories. Finally, an analysis will be performed to evaluate the requirements of real time data and how real-time data could improve the benchmarking tool and future tools and services.
by Jordan Riley Landis.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering
6
Bazalar, Rojas Ricardo Andrés, and Flórez Eduardo Enrique Sedano. "Impacto de la gestión del tiempo en el desempeño de las funciones del personal del área de operaciones de las líneas navieras que actúan en el puerto de apm terminals en el año 2019." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/650405.
Full textAbstract:
El presente informe está dividido en 6 capítulos. El contenido del primer capítulo se centra en explicar conceptos teóricos claves, como el comercio internacional, logística, transporte marítimo y también las características del área de operaciones de una línea naviera: su estructura, funciones y los principales agentes dentro de su cadena de procesos. Por motivos de la investigación se tomaron como referencia cuatro líneas que operan actualmente en APM Terminals: ONE, MSC, HLC & HMM. Además, se tratará el tema de gestión del tiempo, detallando también técnicas y modelos (como la Matriz de Eisenhower) propuestos por expertos en los temas de eficiencia y productividad.
En el segundo capítulo presentamos el objetivo principal y específicos que serán la base de nuestra investigación. Dentro de los objetivos secundarios buscamos identificar posibles causas de pérdida de tiempo que puedan afectar al área, en particular cuando se ejecuta su tarea más importante: el proceso de llenado del CAL (Lista de Embarque de Contenedores).
En el tercer capítulo se explicará la metodología usada, detallando el tipo de estudio, técnica de muestreo y los métodos de recopilación de datos. En este caso, se optó por un estudio mixto.
Finalmente, en el capítulo cuarto, quinto y sexto se presentan los formatos de las herramientas de investigación, los resultados obtenidos, y las conclusiones y recomendaciones, respectivamente.
Se tiene la expectativa que los hallazgos obtenidos puedan servir de base para otras investigaciones, o incluso ayudar a las líneas navieras a identificar posibles deficiencias en sus políticas de manejos de tiempo para aumentar así su productividad.This report is divided into 6 chapters. The content of the first chapter focuses on explaining key theoretical concepts, such as international trade, logistics, maritime transport and also the characteristics of a shipping lines’ operations department: its structure, functions and the main agents within its process chain. For research purposes, four lines that currently operate in APM Terminals were taken as reference: ONE, MSC, HLC & HMM. In addition, the topic of time management will be discussed, detailing techniques and models (such as the Eisenhower Matrix) proposed by experts in the areas of efficiency and productivity. In the second chapter we present the main and specific objectives that will be the basis of our research. Within the secondary objectives we seek to identify possible causes of time mismanagement that may affect the area, particularly when its most important task is executed: the process of filling the CAL (Container Announcement List). The third chapter explains the methodology used, detailing the type of study, sampling technique and data collection methods. In this case, a mixed study was chosen. Finally, the research tools’ formats, the results obtained, and the conclusions and recommendations, respectively, are presented in the fourth, fifth and sixth chapters. It is expected that the obtained findings may serve as a basis for further research, or even help shipping lines identify possible deficiencies in their time management policies to increase their productivity.
Tesis
7
Waitayangkoon, Chalermpol. "Factors Affecting the Efficient Performance of the Thai State Railway Authority: a Time-Series Data Analysis." Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc330635/.
Full textAbstract:
The Thai State Railway Authority (RSR) is a public enterprise in Thailand. As an organization its performance is subject to the argument of contingency theorists that operating efficiency is dependent upon various factors both in the internal and external environments of the enterprise. Most of the internal factors are those that organization theorists in the developed world have identified such as goals and objectives, resources, and organization structures. Meanwhile, external factors such as political, economic and social conditions of the society are regarded as indirect factors that have less importance than do the internal factors. Scholars of the developing world have argued that political, social and economic conditions in the society are as important as internal factors. These factors may have a very significant influence on the enterprises and on the society as a whole. Consequently, public enterprises in developing countries always encounter the same problem of operating inefficiency. The RSR is selected as a case study because of its advantages over the other public enterprises in Thailand in terms of size of operation, length of service, and data availability. For the purpose of this project, data are collected from 1960 to 1984 for longitudinal analysis. The methods of analysis are divided into two major sections: simple regression testing and multiple regression testing. The principal component technique is used in both testings to reduce variables to a smaller number for further analysis. The simple regression tests yielded mixed results, but the multiple regression tests resulted in significant relationships. The three new factors derived from the factor analysis technique were labeled as "the organizational pressures," "the socio-political downturn," and "the public criticisms." They explained 84% of all the variance of operating efficiency. The other 16% was the effect of other factors including the management skills, which were excluded from this analysis.
8
Chatterjee, Arnab. "Optimization of mine ventilation fan speeds according to ventilation on demand and time of use tariff." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/45900.
Full textAbstract:
With the growing concerns about energy shortage and demand supply imbalance, demand side
management (DSM) activities has found its way into the mining industry. This study analyzes
the potential to save energy and energy-costs in underground mine ventilation networks, by
application of DSM techniques. Energy saving is achieved by optimally adjusting the speed
of the main fan to match the time-varying flow demand in the network, which is known as
ventilation on demand (VOD). Further cost saving is achieved by shifting load to off-peak
or standard times according to a time of use (TOU) tariff, i.e. finding the optimal mining
schedule.
The network is modelled using graph theory and Kirchhoff’s laws; which is used to form a
non-linear, constrained, optimization problem. The objective of this problem is formulated
to minimize the energy cost; and hence it is directly given as a function of the fan speed,
which is the control variable. As such, the operating point is found for every change in the
fan speed, by incorporating the fan laws and the system curve.
The problem is solved using the fmincon solver in Matlab’s optimization toolbox. The
model is analyzed for different scenarios, including varying the flow rate requirements and tariff structure. Although the results are preliminary and very case specific, the study suggests
that significant energy and energy-cost saving can be achieved in a financially viable
manner.Dissertation (MEng)--University of Pretoria, 2014.
tm2015
Electrical, Electronic and Computer Engineering
MEng
Unrestricted
9
Wahl, Mark D. "Key Influences on Hydraulic Efficiency in Treatment Wetlands." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1385421888.
Full text
10
Broman, Elina. "Model for Process Time Analysis in Magnetic Resonance Imaging : Workflow Optimization to Reduce Access Time." Thesis, KTH, Medicinteknik och hälsosystem, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279312.
Full textAbstract:
Magnetic Resonance Imaging (MRI) can be used in many clinical situations, but they are limited by high costs and time-consuming properties. Most focus has been on improving the technical side of MRI, and not as much on process improvements. Long access times to MRI examinations can be the cause of inefficient workflows of the departments, which can cause adverse effects for the patients. A market research of the Swedish radiology departments that perform MRI examinations resulted in a wide range of median access times, ranging from approximately 21 days to 130 days. This indicates potential for improvement in their workflows. To improve workflows, they need to be analysed and measured. A model for process time efficiency analysis in MRI departments was created in this project which can assess 5 different metrics. These metrics are number of examinations, examination time, turnover time, scanner utility, and scheduling consistency. Potential improvement strategies to reduce the access times associated with the metrics in the model is discussed. Examination time is mostly affected by the technique and the examination protocol but making the change to an abbreviated version of the protocol has the potential to significantly reduce examination time. This is especially useful for screening purposes. Reduction in turnover time can be achieved by analysing the process in between examinations and making suitable changes in preparation of patients and examinations, and in architecture for a more streamlined throughput. The scheduling process has a large impact on efficiency and reduction in access times and increasing utility rate. It is important for the scheduling process to be flexible to increase efficiency. As a result of this report, the conclusion is that a benchmarking project could be conducted on Swedish radiology departments to determine best practices in workflows.Magnetresonanstomografi (MRT) kan användas i många kliniska situationer, men de är begränsade av höga kostnader och tidskrävande egenskaper. Störst fokus har tidigare varit på de tekniska aspekterna av MRT och inte lika mycket på processförbättring. Långa väntetider till MRT-undersökningar kan vara orsaken av ineffektiva arbetssätt på avdelningarna, vilket skapar negativa effekter för patienter. En marknadsundersökning av de svenska radiologiavdelningarna som utför MRT-undersökningar resulterade i ett stort spann av väntetider, från ungefär 21 dagar till 130 dagar. Detta indikerar förbättringspotential i deras arbetssätt. För att förbättra arbetssätt måste de analyseras och mätas. En modell för att mäta effektivitet för processtder på MRT-avdelningar skapades i detta projekt med fem olika mätvärden. Dessa mätvärden är antal undersökningar, undersökningstid, tid mellan undersökningar, användningsgrad av maskiner och efterföljande av bokningstid. Potentiella förbättringsstrategier för att minska väntetider länkade till mätvärderna i modellen diskuteras. Undersökningstiden påverkas mest av tekniken och protokollet för undersökningen, men genom att byta till ett förkortat protokoll kan undersökningstiden minskas avsevärt. Detta kan vara särskilt användningsbart vid screeningundersökningar. Tiden mellan undersökningar kan minskas genom att analysera processen mellan undersökningarna och göra ändringar i förberedelser av patient och undersökning samt arkitektuella ändringar för en mer effektivserad genomströmning. Bokningsprocessen har en stor betydelse för effektiviteten, minskning av väntetider och ökad användningsgrad. Det är viktigt att bokningsprocessen är flexibel för att öka effektiviteten. Som resultat av denna rapport är slutsatsen att ett benchmarkning-projekt kan utföras på svenska radiologiavdelningar för att hitta bra arbetssätt.
11
Lisnati, Jayadi Ester, Najmus Sadat, and Hugo Richit. "Humanitarian Supply Chain: Improvement of Lead Time Effectiveness and Costs Efficiency : A multiple case study on the preparedness stage of humanitarian organizations with their partners." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96013.
Full textAbstract:
Title: Humanitarian Supply Chain: Improvement of lead time effectiveness and cost-efficiency. A multiple case study on the preparedness stage of humanitarian organizations with their partners. Authors: Ester Lisnati Jayadi, Hugo Richit, Najmus Sadat. Background: 315 natural disasters events were reported, causing 11,804 deaths, affecting 68 million people, and costing US$131.7 billion in economic losses worldwide. This fact emerges the importance of humanitarian organizations (HOs) to act in reducing suffering and improving peoples’ life. However, the greater donations and support to HOs still do not solve this enormous issue at all which forces HOs to pursue greater accountability by improving their effectiveness and efficiency in terms of time and cost in disaster activities, especially in preparedness activities. No single actors like HOs have sufficient resources to solve the disaster problem alone; thus, they need partners to work hand in hand to relieve the suffering. Performance measurement through integration called performance management process is the key to enabling HOs and their partners to achieve the lead time effectiveness and cost-efficiency. Purpose: The purposes of the study are to explore which performance measurements are needed between humanitarian organizations with their partners and to explore how to integrate their relationship to improve lead time effectiveness and cost-efficiency. Then, the suggestions can be made by fulfilling the purposes. Method: A multiple case study by utilizing qualitative data through semi-structured interviews. Findings and Conclusions: RQ 1. What HSC (humanitarian supply chain) performance measurements are needed in the HSC’s preparedness stage in order to achieve the lead time effectiveness and cost efficiency? The performance required measurements in HSC’s preparedness stage to achieve lead-time effectiveness, and cost-efficiency are organizational procedures, learning and evaluation, HO’s mission, feedback, budgeting, fund management, sourcing, human and resource management, IT utilization, infrastructure utilization, human resources utilization, delivery time, knowledge management, information sharing, and employee management. RQ 2. How to integrate the HSC performance management process in the HSC’s preparedness stage to improve the lead time effectiveness and cost efficiency? By implementing a proposed performance management process, aligning vision and mission, trusting each other, utilizing IT technologies, improving the language, and applying standardization in HSC. Keywords: Humanitarian Supply Chain Management. Humanitarian Supply Chain. Preparedness Stage. Natural Disasters. Humanitarian Organizations. Partners. Dyads. Multiple Case Studies. Performance Measurements. Performance Management Process. Supply Chain Process Integration
12
Huang, Zhixing. "Cost-Effectiveness of Electricity Energy Efficiency Programs: Demand-Side Management's (DSM) Future Role in Energy Markets and Feasibility of Smart Meters in New York City." Thesis, Boston College, 2011. http://hdl.handle.net/2345/1999.
Full textAbstract:
Thesis advisor: Scott FulfordCan smart metering program and time-of-use (TOU) prices help reduce energy consumption in New York City? Being able to track electricity consumption levels and to modify consumer usage patterns are important for policy makers to efficiently manage the energy markets. Unfortunately, no reliable and up-to-date data have been brought to bear on this question. I study the effects of time-of-use (TOU) prices and smart metering for the residents of Shanghai and I investigate further what can policy makers do in order to adapt and transfer this successful DSM experience from Shanghai to the residential sector in New York City. The primary objective of my study is to characterize the realistic short-term and long-term potential for the smart metering program in New York City given my empirical findings that the smart metering program has had brought great benefits to the residents of Shanghai. People respond to incentives; if electricity is charged at different prices throughout a day, consumers are likely to shift their usage to when it is cheaper. My findings suggest that policy makers should think harder about designing a pricing scheme that can optimize the social plus
Thesis (BA) — Boston College, 2011
Submitted to: Boston College. College of Arts and Sciences
Discipline: College Honors Program
Discipline: Economics Honors Program
Discipline: Economics
13
Kaynak, Hale 1956. "The Relationship between Just-in-Time Purchasing and Total Quality Management and Their Effects on the Performance of Firms Operating in the U.S.: an Empirical Investigation." Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc277695/.
Full textAbstract:
U.S. companies have implemented just-in-time purchasing (JITP) and total quality management (TQM) techniques to improve their global competitive position. The lack of empirical research on these techniques with firm's performance is the reason to explain further their strategic values as management innovations in different types and sizes of organizations. From a theoretical foundation on the relations between innovation, strategy and performance, the following research questions were generated: (1) Are JITP and TQM positively related to the firm's performance?, (2) Do the combination/sequence of implementing JITP and TQM have a relation with the firm's performance?, and (3) Is the relationship between JITP and TQM to the firm's performance moderated by any of industry type, firm size,firm type and/or duration of JITP and TQM techniques? A model is developed and hypotheses are proposed. A survey is mailed to firms operating in the U.S. that have implemented one or both techniques. Questionnaire items measuring JITP, TQM, performance, and moderating variables - industry type, firm size,firm type, and duration of JIT purchasing and TQM techniques— are either developed or borrowed from other studies. From rosters of the American Society for Quality Control and the National Association of Purchasing Management, 1884 target respondents result in a 20.3 percent response rate. Reliability and factor analysis of the constructs are established. The research model is tested by canonical correlation analyses before a separate hierarchical regression analysis of sets is run for each of the three performance factors: financial and market, time-based quality and material productivity. The extent of JITP and TQM implementation positively and significantly relate with firm's performance. Furthermore, the relation between JITP and financial and market performance is higher in industries that face high foreign competition. Firm size, firm type and duration of JITP and TQM techniques are nonsignificant moderators. An improved research model is offered.
14
Molinari, Mikael, and Natalia Silinski. "Optimering med tredjepartslogistik : Ekonomisk och tidseffektivisering av bygglogistik." Thesis, KTH, Byggteknik och design, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215203.
Full textAbstract:
I dagens byggproduktion i Sverige tillkommer nya bostäder alltför långsamt samtidigt som fler äldre bostäder och bostadsområden är i behov av upprustning. Detta ställer generellt höga krav på byggbranschen och följden blir också förhöjda krav på bygglogistiken.Många av Sveriges län har ökat tempot på byggandet för att klara av de mål som ställs på byggbranschen, framförallt i Stockholms län. I ett tätbebyggt område som Stockholm, där det idag byggs i högt tempo blir logistiken försvårad. I denna geografiska komplexitet finns emellertid lösningar på bygglogistiken, det handlar om tredjepartslogistik.En entreprenör från tredje part appliceras i projektet och sköter delar av eller hela bygglogistiken. De koordinerar, planerar leveranser samt optimerar materialflödet till byggarbetsplatsen med en mängd olika tjänster. Från början av 2000-talet har modern logistik avancerat allt mer, med exempelvis tredjepartslogistik. Den moderna logistiken är numera en konkurrenskraftig strategi mellan olika företag i branschen.Sundbybergs kommun är en del av Stockholms län som växer snabbast, samtidigt som detta är ett av Stockholms mest tättbefolkade områden. Här finns nästan alla typer av byggnationer, med allt ifrån kontor, bostäder, kommunikationer, butiker och övrig service till torg och grönområde. Projektet Orgeln 7 vilket rapporten utgår ifrån ligger i Sundbybergs centrum.Med en ökad bebyggelse i en tätort som Sundbyberg kommer det att krävas en ökad kunskap för tredjepartslogistik. Detta för att över huvud taget klara av ett bygge på en komplex arbetsplats. Men med rätt förutsättningar på en byggarbetsplats kommer också tredjepartslogistik att effektivisera bygglogistiken. Med denna effektivisering kan både tid och ekonomi sparas, vilket bidrar till en lönsammare produktion i slutändan. Effektiviseringen bidrar inte bara till en eventuell förbättring av tid och ekonomi. Tredjepartslogistik bidrar också till eventuell förbättring av både arbetsmiljö och en förminskad risk för att material förstörs på byggarbetsplatsen.Syftet med denna rapport är att genom intervjuer, fältobservationer, litteraturstudier och tidtagningar fördjupa sig i hur tredjepartslogistik påverkar ekonomin för ett byggprojekt samt hur produktion påverkas tidsmässigt.En del av slutsatsen i rapporten påpekar att finns inte kunskap inom tredjepartslogistik blir den svår att applicera på en byggarbetsplats. Om tredjepartslogistik blir för avancerad för snabbt, samt om människor som ska jobba med detta saknar kunskapen, blir det obalans. Obalansen kan leda till att tredjepartslogistik riskerar att bli nedprioriterad.The construction industry in Sweden today is producing new housing far too slow. At the same time older housing and housing areas are in need of renovating. In general this puts high requirements on the building industry and the requirements become elevated on the construction logistics.A lot of regions in Sweden have increased the building speeds in order to finish the goals set in the construction business, especially in the Stockholm region. In a urban area such as Stockholm where there is a high building pace, the logistics is obstructed. In this geographical complexity there are solutions to the building logistics, and the solution is third party logistics.A third party contractor is applied in the project and manages either parts or the whole of the logistics. They coordinates, plan deliveries and optimize the material-flow to the construction site with a number of different services. From the beginning of the year 2000 modern logistics has become more advanced with third party logistics. This modern logistic is nowadays a competitive strategy between different companies in the construction business.Sundbyberg county is one of the densest populated and fastest growing parts of the Stockholm region. In this area almost all type of constructions exists ranging from offices, housing, public transportations, stores, and general services for the community. Project Orgeln 7, where the project originates from, is located in central Sundbyberg.With higher construction in a densed populated area such as Sundbyberg a higher knowledge of third party logistics is required. This is necessary in order to manage construction in a complex working environment. With the right conditions on the construction site third party logistics will make the building logistics more efficient. This will finally lead to both time and money saved which will contribute to a more profitable production. Third party logistics also contributes to a possible improvement of working environment and a decreased chance of material going to waste at the construction site.The purpose with this report is that through interviews, field observations, literary studies and time studies on site, students get a deeper understanding of how third-party logistics affects the economy of a construction project and how production is affected temporally.Part of the conclusion in this report points out that if the knowledge of third party logistics within a construction site is lacking, this will be difficult to apply. If third party logistics gets to advance to fast, and if people who will be working with this, lacks the knowledge there will be imbalance. This imbalance could lead to third party logistics getting less prioritized.
15
Істратов, Д. А. "Значення часового ресурсу у забезпеченні економічної стабільності сучасних організацій." Thesis, Українська академія банківської справи Національного банку України, 2014. http://essuir.sumdu.edu.ua/handle/123456789/59970.
Full textAbstract:
Податки є одним з найважливіших способів мобілізації фінансових
ресурсів, необхідних для вирішення основних завдань і функцій держави.
Відповідно до вимог Податкового кодексу України банки самостійно
обчислюють та сплачують до відповідних бюджетів за своїм
місцезнаходженням загальнодержавні податки і збори, місцеві податки та
подають податкові декларації до податкових органів.
16
Bradwell, Rebecca S. "The economics of going paperless : the case of container freight company." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2169.
Full text
17
Ljung, Mikael. "Hemtjänsten och marknaden : Om praktisk kunskap och marknadsstyrning." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-32790.
Full textAbstract:
Denna uppsats undersöker genom en fallstudie av hemtjänsten hur organisering och styrning enligt principerna för New Public Management påverkar omsorgspersonalens möjlighet att medvetandegöra, utveckla, föra vidare samt tillämpa sin praktiska yrkeskunskap. Materialet till studien baseras på semistrukturerade intervjuer av vårdbiträden med lång yrkeserfarenhet som upplevt de förändringar av verksamheten som genomförts sedan början på 1990-talet. Studiens syfte är att med hjälp av organisations- och managementteori, med fokus på rationalitet och effektivitet, samt teorin om praktisk kunskap analysera om organiseringen påverkar villkoren för utövandet av den praktiska kunskapen i verksamheten. Resultaten visar att organisations- och styrningsmodellen som manifesterats genom en utpräglad tids- och detaljstyrning av omsorgsarbetet påverkat verksamhetens praktiska kunskap negativt då den inneburit att vårdbiträdenas handlingsutrymme begränsats. En slutsats som kan dras av studiens resultat är att den utpräglade strävan efter kostnadseffektivitet kommit i konflikt med vårdbiträdenas möjlighet att tillämpa sin praktiska yrkeskunskap. Dagens organisering av verksamheten präglas med andra ord av motstridiga logiker då jakten efter kostnadseffektivitet sker på bekostnad av den praktiska kunskapen och omsorgsrationaliteten.The thesis investigates through a case study of the home care service how organisation and management by the principles of New Public Management influences the home care staff´s possibilities to awareness rising, to develop, to communicate and to practice their practical knowledge. The study is based on semi-structured interviews with home care personnel of long professional experience who have experienced the organisational chances that begun in beginning of the 1990:s. The aim of the study is to analys whether the model of organization and mangement influences the conditions of the personnels work practise. The analytical tool of the study is a theoretical framework of organizational theories, with the fokus on rationality and efficiency, and the theory of practical knowledge. The findings show that the organizational- and management modell that is displayed through a distinct exemplary of time- and detail-mangement have had a negative influence on the practical knowledge of the sphere of activities. It is so because of the limitations the organizational model put on the home care staffs possibility to act in accordance with their experience acquired practical knowledge. In other words the current organization of the work in the home care service constitutes of contradictory logics by the fact that the aspiration for cost efficiency takes place on the expence of the practical knowledge and the rationality of care.
18
Fischer, Tobias Christian, and Elin Lawson. "The Embeddedness of Information Technology in the Workflow of Business Processes : How Can IT Support and Improve the Way Work is Done?" Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202627.
Full textAbstract:
Wise investments in Information Technology have become increasingly important in staying competitive in today's environment. Massive amounts of people and IT-systems are involved in the process of input becoming output. As these employees and IT-systems must be harmonized, it becomes relevant to study how employees’ routines and habits are related to the usage and embeddedness of these systems. Therefore, the purpose of this paper is to investigate how embedded IT can lead to improved business processes. This is done through exploring how embedded IT is used in workflows as well as to examine what support and hindrance IT can offer. Therefore, extensive theoretical research was conducted within the fields of habits and routines, business processes and embedded IT, developing a framework for analysis. Then, a case study was conducted where a specific process within insurance claims was thoroughly analyzed through interviews and work shadowing. This facilitated a within-case analysis. The results of the study showed the interdependency between the pillars of this study. Workflow habits and routines influences IT usage, whereas IT aims to support through automatization and informatization. However, to enable this and achieve a significant improvement, the processes it aims to support needs to be fully known.
19
Villar, Romero Alex, and Flores Edson Josue Portella. "Incremento de productividad en el proceso de tejeduría a través de la implementación del estudio del trabajo en la empresa textil Cumpi Perú S.A.C." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/657356.
Full textAbstract:
La industria del sector textil abarca un abanico de posibilidades de desarrollo de productos, desde las fibras, hilos, tejidos, telas, acabados, hasta la confección de prendas de vestir. Asimismo, en los últimos años se han registrado variaciones de producción en la industria textil del país. Como parte del presente trabajo de tesis, se ha utilizado información de los últimos cinco años de la empresa Textil Cumpi Perú S.A.C., especialista en el desarrollo de telas alternativas para una variedad de productos textiles dirigidos al mercado nacional e internacional.
La hipótesis de la presente tesis sostiene que la aplicación de la metodología del estudio del trabajo incrementará la productividad del proceso de producción de tejeduría, estandarizando los procesos de producción y permitiendo identificar y reducir defectos de los rollos de tela en la empresa citada.
El problema identificado en dicha empresa es la elevada cantidad de defectos (producto no conforme) de los rollos de tela en el proceso de tejeduría, que viene superando el nivel máximo permitido por ésta. La variedad de defectos de los rollos de tela comprende lo siguiente: motas, contaminación de tela, mechas de hilo y caídas de tela. En base a ello, se revisaron y estudiaron a profundidad bibliografía y trabajos de investigación indexados referentes a la metodología del estudio del trabajo, así como sobre el uso de herramientas de ingeniería industrial y casos de éxito de la industria textil para mejorar los procesos e incrementar la productividad en el proceso de tejeduría.
Luego de realizar las evaluaciones correspondientes, y con la autorización de la empresa, se desarrolló un plan piloto y simulaciones con un software para validar los resultados reales de la implementación, donde se concluyó que, al aplicar la metodología del estudio del trabajo, se logró incrementar la productividad en 11%, a partir de la reducción de más de 480 rollos de tela no conformes en el proceso e tejeduría y obteniendo ahorros de más de $48,000 dólares anuales.
Se espera que el presente estudio sea motivo de investigación dentro de la industria textil.The textile industry encompasses a range of product development possibilities, from fibers, yarns, fabrics, textile finishes, to garment manufacturing. Likewise, in recent years there have been production variations in the nation’s textile industry. As part of this thesis work, data from the last five years of the company Textil Cumpi Perú S.A.C. have been used, a specialized enterprise in the development of alternative fabrics for a variety of textile products aimed at the national and international market. The hypothesis of the present thesis suggests that the application of the work study methodology will increase the weaving production process’ productivity, standardizing production processes and allowing the identification and reduction of defects of the fabric rolls in the aforementioned company. The problem identified in this enterprise is the high number of defects (nonconforming product) of the fabric rolls in the weaving process, which has been exceeding the maximum level allowed by the company. The variety of fabric roll defects includes the following: speckles, fabric contamination, yarn wicks and fabric sags. Based on this, an in-depth literature review was performed, which included indexed research studies referring to the work study methodology, use of industrial engineering tools and success stories of the textile industry for improving processes and increase productivity in the weaving process. After conducting the corresponding evaluations, and with the authorization of the company, a pilot plan and simulations with software were developed to validate the real results of the implementation, where it was concluded that, by applying the work study methodology, it was possible to increase productivity by 11%, from the reduction of more than 480 nonconforming fabric rolls in the weaving process and obtaining savings of more than $48,000 (USD) annually. It is expected that this study becomes a reason for research within the textile field and industry.
Trabajo de Suficiencia Profesional
20
Tacic, Ivan. "Efficient Synchronized Data Distribution Management in Distributed Simulations." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6822.
Full textAbstract:
Data distribution management (DDM) is a mechanism to interconnect data producers and data consumers in a distributed application. Data producers provide useful data to consumers in the form of messages. For each message produced, DDM determines the set of data consumers interested in receiving the message and delivers it to those consumers.
We are particularly interested in DDM techniques for parallel and distributed discrete event simulations. Thus far, researchers have treated synchronization of events (i.e. time management) and DDM independent of each other. This research focuses on how to realize time managed DDM mechanisms. The main reason for time-managed DDM is to ensure that changes in the routing of messages from producers to consumers occur in a correct sequence. Also time managed DDM avoids non-determinism in the federation execution, which may result in non-repeatable executions.
An optimistic approach to time managed DDM is proposed where one allows DDM events to be processed out of time stamp order, but a detection and recovery procedure is used to recover from such errors. These mechanisms are tailored to the semantics of the DDM operations to ensure an efficient realization. A correctness proof is presented to verify the algorithm correctly synchronizes DDM events.
We have developed a fully distributed implementation of the algorithm within the framework of the Georgia Tech Federated Simulation Development Kit (FDK) software. A performance evaluation of the synchronized DDM mechanism has been completed in a loosely coupled distributed system consisting of a network of workstations connected over a local area network (LAN). We compare time-managed versus unsynchronized DDM for two applications that exercise different mobility patterns: one based on a military simulation and a second utilizing a synthetic workload.
The experiments and analysis illustrate that synchronized DDM performance depends on several factors: the simulations model (e.g. lookahead), applications mobility patterns and the network hardware (e.g. size of network buffers). Under certain mobility patterns, time-managed DDM is as efficient as unsynchronized DDM. There are also mobility patterns where time-managed DDM overheads become significant, and we show how they can be reduced.
21
Avashia, Prashant. "Achievement of efficient operations control through just in time production management." Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9820.
Full text
22
Becker, Matthias. "Efficient Resource Management for Many-Core based Industrial Real-Time Systems." Licentiate thesis, Mälardalens högskola, Inbyggda system, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-29290.
Full textAbstract:
The increased complexity of today’s industrial embedded systems stands inneed for more computational power while most systems must adhere to a restrictedenergy consumption, either to prolong the battery lifetime or to reduceoperational costs. The many-core processor is therefore a natural fit. Due tothe simple architecture of the compute cores, and therefore their good analyzability,such processors are additionally well suited for real-time applications.In our research, we focus on two particular problems which need to be addressedin order to pave the way into the many-core era. The first area is powerand thermal aware execution frameworks, where we present different energyaware extensions to well known load balancing algorithms, allowing them todynamically scale the number of active cores depending on their workload.In contrast, an additional framework is presented which balances workloadsto minimize temperature gradients on the die. The second line of works focuseson industrial standards in the face of massively parallel platforms, wherewe address the automotive and automation domain. We present an executionframework for IEC 61131-3 applications, allowing the consolidation of severalIEC 61131-3 applications on the same platform. Additionally, we discussseveral architectural options for the AUTOSAR software architecture on suchmassively parallel platforms.PREMISE
23
Anany, Hossam. "Effectiveness of a Speed Advisory Traffic Signal System for Conventional and Automated vehicles in a Smart City." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-156650.
Full textAbstract:
This thesis project investigates the state-of-the-art in traffic management "Green Light Optimal Speed Advisory (GLOSA)" for vehicles in a smart city. GLOSA utilizes infrastructure and vehicles communication through using current signal plan settings and updated vehicular information in order to influence the intersection approach speeds. The project involves traffic microscopic simulations for a mixed traffic environment of conventional and automated vehicles (AVs) both connected to the intersection control and guided by a speed advisory traffic management system. Among the project goals is to assess the effects on traffic performance when human drivers comply to the speed advice. The GLOSA management approach is accessed for its potential to improve traffic efficiency in a full market penetration of connected AVs with absolute compliance. The project also aims to determine the possible outcome resulting from enhancing the AVs capabilities such as implementing short time headways between vehicles in the future. The best traffic performance results achieved by operating GLOSA goes for connected AVs with the lowest simulated time headway (0.3 sec). The waiting time reduction reaches 95% and trip delay lessens to 88 %.
24
Chieregato, Federico. "Modelling task execution time in Directed Acyclic Graphs for efficient distributed management." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Find full textAbstract:
In this thesis, has been shown a framework that predicts the execution time of tasks in Directed Acyclic Graphs (DAG), each task is the smallest unit of work that executes a function over a set of inputs and in this scenario represents a vertex in a DAG. This thesis includes an implementation for extracting profiling information from Apache Spark, as well, an evaluation of the framework for the Spark decision support benchmark TPC-DS and an in-house and completely different DAG runtime system for real-world DAGS, involving computational quantum chemistry applications.
Speeding up the execution in Spark or other workflows is an important problem for many real-time applications; since it is impractical to generate a predictive model that considers the actual values of the inputs to tasks, has been explored the use of Surrogates as the number of parents and the mean parent duration of a task. For this reason, this solution takes the name of PRODIGIOUS, Performance modelling of DAGs via surrogate features. Since the duration of the tasks is a float value, have been studied different regression algorithms, tuning the Hyperparameters through GridSearchCV.
The main objective of PRODIGIOUS concern, not only to understand if the use of surrogates instead of actual inputs is enough to predict the execution time of tasks of the same DAG type, but also if it is possible to predict the execution time of tasks of different DAG type creating so a DAG agnostic framework that could help scientist and computer engineer making more efficient their workflow. Others agnostic feature chosen were, the core for each task, the RAM of the benchmark, the data access type, and the number of executors.
25
Sarker, Tusher Kumer. "Cost-efficient virtual machine management in data centers." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/94743/1/Tusher%20Kumer_Sarker_Thesis.pdf.
Full textAbstract:
Virtual Machine (VM) management is an obvious need in today's data centers for various management activities and is accomplished in two phases— finding an optimal VM placement plan and implementing that placement through live VM migrations. These phases result in two research problems— VM placement problem (VMPP) and VM migration scheduling problem (VMMSP). This research proposes and develops several evolutionary algorithms and heuristic algorithms to address the VMPP and VMMSP. Experimental results show the effectiveness and scalability of the proposed algorithms. Finally, a VM management framework has been proposed and developed to automate the VM management activity in cost-efficient way.
26
Karlsson, Louise, and John Olofsson. "Tidseffektivitet vid ljumskbråcksoperationer : - Jämförelse mellan privat- och offentlig vårdgivare." Thesis, Linköpings universitet, Hälsouniversitetets läkarutbildning, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122239.
Full textAbstract:
Bakgrund: Ljumskbråck är den vanligaste operationen inom allmänkirurgin, varje år utförs nästan 20 000 operationer i Sverige. I Östergötland utförs ljumskbråcksoperationer på tre ställen inom ramen för dagkirurgi; vid Aleris Specialistvård i Motala (ASM), Närsjukvården i Finspång (NiF) samt Medicinskt Centrum i Linköping (MCL). Det finns en teori om att privata vårdgivare är mer tidseffektiva än offentliga vårdgivare. De privata anses kunna utföra fler operationer under en given tid, men ingen studie har gjorts på tidseffektiviteten kring operationerna hos respektive vårdgivare. Denna studie har genomförts för att detektera om det finns en skillnad i hur lång tid olika moment tar att utföra och vad denna skillnad i sådana fall beror på, samt om patientunderlaget skiljer sig mellan klinikerna. Metod: Studien omfattade 70 patienter fördelade på tre kliniker; ASM, MCL och NiF. Ljumskbråcksoperationerna delades upp i flertalet moment som mättes med digital klocka. Dessutom samlades uppgifter in om patientens ålder, ASA-klass, BMI samt information om vilka som närvarade i operationssalen. Statistisk analys gjordes enligt Kruskal-Wallis. Programvaran som användes var SPSS version 22. Resultat: Studien fann ingen signifikant skillnad i BMI, ASA-klass eller ålder mellan klinikernas patienter (p > 0,05 för samtliga). Däremot fanns stora skillnader vad gäller hur lång tid ett flertal av momenten under ljumskbråcksoperationen tog. Slutsats: Studien påvisar att det finns stora skillnader i olika moment vid ljumskbråcksoperationer. De privata klinikerna var alltid snabbare än den offentliga kliniken. Då det saknas studier inom området vore det intressant att se om det finns liknande skillnader vid andra ingrepp som utförs av olika aktörer.Background: Inguinal hernia surgery is one of the most common surgeries within general surgery, with approximately 20 000 surgeries per year in Sweden. There are three places in Östergötland County where inguinal hernias are executed within outpatient surgery; at Aleris Specialistvård in Motala (ASM), Närsjukvården in Finspång (NiF) and at Medicinskt Centrum in Linköping (MCL). There is a theory that private health care providers are more time-efficient than public health care providers. The private health care providers are considered to perform more operations over a given time though no studies has been done on time efficiency. This study was performed to detect if there is a difference in time in the various steps during the surgery between the clinics, what causes these differences and if the patients differ. Methods: The study includes 70 patients distributed on three outpatient surgery clinics; ASM, MCL and NiF. The inguinal hernia operations were divided into shorter steps measured with a digital watch. Furthermore, data were noted about the patients’ age, ASA-score, BMI and who were present in the operating room. Statistical analyses were performed with the Kruskal-Wallis one-way analysis of variance. The software used was SPSS version 22. Results: The study found no significant difference in BMI, ASA-score and age between the health care providers (p > 0,05). However, regarding the time efficiency, there were significant differences between the clinics. Conclusions: The study concludes that there are big differences in time, within the various steps in the inguinal hernia surgeries, between the clinics. The private health care providers were always faster than the public health care provider. Since no earlier studies have been made in this area, it would be interesting to see if there are similar differences in other types of surgeries.
27
Karlsson, Hanna, and Ottilia Bergström. "Effektivisering av lagerhantering hos ett distribuerande företag : En fallstudie på Postnord." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104197.
Full textAbstract:
Högre krav ställs på effektivitet och optimering av flödet hos distribuerande företag för att kunna möta det ökade antalet varor som hanteras. För att möta detta krav krävs ledtidsreducering i form av att minska icke värdeskapande tid samt att fokusera på arbetsmiljö för medarbetarna, i form av ergonomi. Ett stort fokus ligger även på att tillfredsställa kund i form av att leverera rätt kvalitet i rätt tid. Syftet med arbetet är att få en förståelse för effektiviseringsmöjligheter inom lagerhantering på ett distribuerande företag och utveckla ett arbetssätt som minskar ledtiden och förbättrar arbetsmiljön med fokus på ergonomi. Målet med studien är att ta fram ett effektivare arbetssätt i form av minskad ledtid och bättre arbetsmiljö, där fokus är ergonomi. Frågeställningar som tagits fram för att uppnå syftet berör hur ett distribuerande företag kan hantera lager på ett effektivare sätt i form av minskad ledtid samt hur lagerhanteringen kan förbättras med avseende på arbetsmiljön och dess ergonomiska aspekter. En värdeflödesanalys har tagits fram baserat på observationer och mätningar. I värdeflödesanalysen framgick det att processerna för inregistrering av paket och plock av paket hade förbättringsmöjligheter. Tester har utförts för att undersöka om olika förbättringsförslag medfört minskad ledtid och förbättrad arbetsmiljö i form av ergonomi. Resultatet visar att ett nytt arbetssätt tillsammans med en ny layout minskar ledtiden samtidigt som arbetsmiljön förbättras då personalen rör sig mindre. Slutsatsen är att ett effektivare och mer ergonomiskt arbetssätt gynnar företaget, medarbetare och kunder.Higher demands are placed on efficiency and optimization of the flow of distribution centers due to the higher amount of products they are handling. To meet this requirement, lead time reduction is required to reduce non-value-adding time and focus on the work environment for a better ergonomics. Another important thing is to satisfy the customer in order to deliver the right quality on the right time. The purpose of the work is to gain an understanding of efficiency opportunities in warehouse management at a distributing company and to develop a working method that reduces lead time and improves the work environment with a focus on ergonomics. The aim of the study is to develop a more efficient way of working to reduce lead time and develop a better work environment, where the focus is on ergonomics. Issues that were developed to achieve the purpose of this case study concern how a distribution company can handle inventory in a more efficient way in the form of reduced lead time and how inventory management can be improved regarding work environment and ergonomic aspects. A value flow analysis was created based on observations and measurements. The value flow analysis showed that two different processes had opportunities for improvement. Tests have been performed to investigate if different improvements could reduce lead time and improve the work environment. The results showed that a new way of working together with a new layout reduced lead time. The conclusion shows that a more efficient and ergonomic way of working benefits the company, the employees, and the customer.
28
El, Masri Ali. "Towards efficient and fair resources management in wireless mesh networks." Thesis, Troyes, 2013. http://www.theses.fr/2013TROY0011/document.
Full textAbstract:
Le but principal des réseaux mesh sans fil (Wireless Mesh Networks-WMNs) est de fournir une dorsale de communication pour un grand nombre d'utilisateurs, car les WMNs doivent supporter un trafic énorme. Dans cette thèse, nous visons la maximisation d'utilisation et la répartition équitable de la bande passante dans les WMNs. Nous considérons deux environnements : WMN utilisant la norme IEEE 802.11 MAC, qui est caractérisée par son déploiement répandu et peu cher, et WMN utilisant les antennes directionnelles, qui représentent une technologie clé pour la réutilisation spatiale dans les réseaux sans fil. Pour les WMMs basés sur IEEE 802.11, nous concevons NICC, un protocole de contrôle de congestion qui reconnaît la congestion comme un problème lié au voisinage, et non pas au lien. NICC gère la congestion par une collaboration entre les nœuds d’un voisinage sans fil. En faisant usage de certains champs sous-exploités dans l'en-tête IEEE 802.11, NICC fournit un retour de congestion implicite et multi-bit. Ceci assure un contrôle précis du trafic sans affecter la bande passante. Pour les WMNs utilisant les antennes directionnelles, nous concevons FreeDMAC, un protocole MAC basé sur la technologie TDMA. FreeDMAC garantit que chaque nœud est conscient de toutes les transmissions dans son voisinage, ce qui évite les problèmes MAC causés par les antennes directionnelles, et ainsi, améliore l'utilisation de la bande passante. En outre, FreeDMAC est capable de fournir deux niveaux d’équité: équité entre les liens et équité entre les fluxThe main purpose of Wireless Mesh Networks (WMNs) is to provide a communication backbone for a high number of end-users, thus WMNs have to support heavy traffic load. In this thesis, we intend to maximize utilization and achieve fair allocation of the bandwidth resources in WMNs. We consider two WMN environments: WMN using the IEEE 802.11 MAC standard, which is characterized by its cheap devices and widespread deployment, and WMN using directional antennas, which are emerged as an attractive technology to enhance the spatial reusability in wireless networks. For WMM based on IEEE 802.11, we design NICC, a congestion control scheme that recognizes congestion as neighborhood-related problem, and not a link-based one. Indeed, complex interference among neighboring nodes is the main starvation cause in WMNs. Therefore, NICC handles congestion using mutual cooperation within a wireless neighborhood. NICC makes use of some underexploited fields in the IEEE 802.11frame header in order to provide an implicit multi-bit congestion feedback, and thus ensure accurate rate control without generating overhead, making efficient use of bandwidth. For WMN with directional antennas, we design FreeDMAC, a TDMA-based MAC scheme with contention-free scheduling. FreeDMAC guarantees that each node is aware of all ongoing transmissions in its neighborhood, and thus avoids directional-related problems such as deafness, making efficient use of bandwidth. Moreover, FreeDMAC presents a link-slot assignment that provides two levels of fairness: Per-link and per-flow fairness
29
Васильєва, Тетяна Анатоліївна, Татьяна Анатольевна Васильева, and Tetiana Anatoliivna Vasylieva. "Многоуровневая система принятия инвестиционных решений как основа управления научно-техническим прогрессом." Thesis, Сумский государственный университет, 2001. http://essuir.sumdu.edu.ua/handle/123456789/51483.
Full textAbstract:
Дисертаційне дослідження присвячено аналізу існуючих та обґрунтуванню нових підходів до формування системи прийняття інвестиційних рішень з метою управління науково-технічним прогресом.
У роботі розкрито значення та основні напрямки управління науково-технічним прогресом, обґрунтовано роль інвестиційного аналізу в цьому процесі, проведено порівняльний аналіз методик з оцінки інвестицій, розроблених для умов планової та ринкової економіки та систематизовано основні підходи щодо обліку фактору часу при управлінні НТП.
Розроблено концепцію багаторівневої системи прийняття інвестиційних рішень, яка містить національний, регіональний, галузевий соціально-економічний аналіз проектів, оцінку їх організаційно-технічної і комерційної ефективності та пристосована до зміни схеми фінансування і складу учасників проекту. На базі існуючих моделей зроблено розрахунок національного та регіональних нормативів дисконтування.
У роботі обґрунтовано необхідність зміни механізму обліку фактору часу та амортизації в інвестиційному аналізі, запропоновано удосконалені методичні підходи до розрахунку показників “чиста теперішня вартість” та “індекс рентабельності”, проведено практичну перевірку застосування нового механізму на базі реальних інвестиційних проектів.Диссертационное исследование посвящено анализу существующих и обоснованию новых подходов к формированию системы принятия инвестиционных решений с целью управления научно-техническим прогрессом. В работе раскрыты значения и основные направления управления научно-техническим прогрессом и обоснована роль инвестиционного анализа в этом процессе. Основными направлениями управления НТП можно считать: определение приоритетов разви-тия отдельных элементов национальной экономики (путем разработки комплексных научно-технических программ); усовершенствование системы оценки качества продукции и технического уровня производства; создание постоянно действующей системы прогнозирования развития национальной экономики; усовершенствование системы государственного экономического стимулирования инновационной деятельности с помощью финансовых рычагов (например, налоговых или кредитных льгот); стимулирование развития и финансовая поддержка науки и образования; предоставление промышленному сектору экономики адаптивного характера; усовершенствование системы оценки инвестиционных проектов с учетом НТП и др. Проанализированы те направления управления НТП, которые непосредственно связаны с не-обходимостью учета фактора времени, а именно: прогнозирование и анализ динамики научно-технических показателей, расчет оптимального периода прогнозирования темпов НТП, измерение уровня неопределенности при оценке основных параметров НТП и ошибок при их вычислении, оптимизация научно-технических решений во времени, установление нормативных сроков службы оборудования и нормативных ставок дисконта (в случае необходимости) и т.д. На основе сравнительного анализа методических подходов к оценке инвестиционных проектов, разработанных в условиях разных экономических систем (на примере плановой и рыночной экономик), сделан вывод о невозможности применения ни одного из них без корректировок в условиях экономики Украины. В связи с этим разработана концепция многоуровневой системы принятия инвестиционных решений, которая включает в себя национальный, региональный, отраслевой социально-экономический анализ проектов, оценку их организационно-технической и коммерческой эффективности, приспособлена к изменению схемы финансирования и состава участников проекта и стимулирует осуществление тех проектов, которые способствуют ускорению НТП. Произведен анализ существующих моделей по оценке нормативов дисконтирования на предмет их применимости в условиях Украины, выбрана оптимальная модель, и на основании стати-стической информации сделан расчет норматива дисконтирования для уровней национального и регионального социально-экономического анализа. Обоснована необходимость изменения механизма учета фактора времени в инвестиционном анализе на основании изменения положения расчетного года, применения дифференцированных ставок дисконта по годам и различающихся по величине ставок для дисконтирования денежных поступлений и инвестиционных вложений. Также разработан механизм учета амортизации в инве-стиционном анализе, позволяющий учитывать тип и предполагаемые темпы НТП. Предложены усовершенствованные методические подходы к расчету показателей “чистая те-кущая стоимость” и “индекс рентабельности”, произведена практическая проверка применения нового механизма на базе реальных инвестиционных проектов, которые выбирались независимо от размера требуемых вложений, отрасли, региона Украины, степени государственного участия в финансировании и других факторов. Выявлено существенное снижение интегрального эффекта и индекса рентабельности при переходе от традиционного способа расчета к предлагаемому, что свидетельствует о сужении рамок принятия проектов за счет учета большего количества экзоген-ных факторов, в т.ч. и НТП. Рассмотрены основные направления реформирования и конкретные предложения по совер-шенствованию современного украинского инвестиционного, инновационного и амортизационного законодательства.
The dissertation is devoted to analysis existing and motivation of new approaches to shaping the system of taking the investment decisions for the research progress management. On base of benchmark analysis of methodical approaches to estimation of investment projects, developed in conditions of different economic systems, it is motivated need of creation to concepts of layered system of taking the investment decisions, which comprises of itself national, regional, branch social-economic analysis of projects, estimation organising-technical and commercial efficiency and tailored to change the schemes of financing and composition of participants of project. On the base existing models is made the calculation national and regional standards of discounting. In work is motivated need of change the mechanism of account of factor of time and amortisation in investment analysis, it is offered modified order of calculation of factors "net present value" and "profitability index" and is organised practical checking the use the new mechanism on base of real investment projects.
30
Katic, Janko. "Efficient Energy Harvesting Interface for Implantable Biosensors." Licentiate thesis, KTH, Integrerade komponenter och kretsar, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-163562.
Full textAbstract:
Energy harvesting is identified as a promising alternative solution for powering implantable biosensors. It can completely replace the batteries, which are introducing many limitations, and it enables the development of self-powered implantable biosensors. An interface circuit is necessary to correct for differences in the voltage and power levels provided by an energy harvesting device from one side, and required by biosensor circuits from another. This thesis investigates the available energy harvesting sources within the human body, selects the most suitable one and proposes the power management unit (PMU), which serves as an interface between a harvester and biosensor circuits. The PMU targets the efficient power transfer from the selected source to the implantable biosensor circuits. Based on the investigation of potential energy harvesting sources, a thermoelectric energy harvester is selected. It can provide relatively high power density of 100 μW/cm2 at very low temperature difference available in the human body. Additionally, a thermoelectric energy harvester is miniature, biocompatible, and it has an unlimited lifetime. A power management system architecture for thermoelectric energy harvesters is proposed. The input converter, which is the critical block of the PMU, is implemented as a boost converter with an external inductor. A detailed analysis of all potential losses within the boost converter is conducted to estimate their influence on the conversion efficiency. The analysis showed that the inevitable conduction and switching losses can be reduced by the proper sizing of the converter’s switches and that the synchronization losses can be almost completely eliminated by an efficient control circuit. Additionally, usually neglected dead time losses are proved to have a significant impact in implantable applications, in which they can reduce the efficiency with more than 2%. An ultra low power control circuit for the boost converter is proposed. The control is utilizing zero-current switching (ZCS) and zero-voltage switching (ZVS) techniques to eliminate the synchronization losses and enhance the efficiency of the boost converter. The control circuit consumes an average power of only 620 nW. The boost converter driven by the proposed control achieves the peak efficiency higher than 80% and can operate with harvested power below 5 μW. For high voltage conversion ratios, the proposed boost converter/control combination demonstrates significant efficiency improvement compared to state-of-the-art solutions.QC 20150413
31
Shen, Jing Cong. "Time efficient state-of-charge estimation using open circuit voltage and the logarithmic modelling for battery management system." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59115.
Full textAbstract:
Battery management systems are important devices for protecting batteries in various electrical and electronic applications. One of the most important features of a properly designed battery management system is the diagnostic techniques for estimating the remaining usable charge in batteries in a time effective manner. This thesis presents two time-efficient and reliable techniques that do not require complex electronic hardware for application. One technique concerns the open-circuit voltage characteristics of a battery while the other technique considers the logarithmic modeling of the equivalent circuit of a lithium-ion battery so that the equilibrium OCV can be found within a shorter period of time. The logarithmic modelling method uses the equivalent circuit model and the characteristics of the subject lithium NMC battery and finds the equilibrium OCV. This thesis will include two techniques for the logarithmic modelling method. One technique uses the long time constant in the equivalent model of the battery and predicts the equilibrium with 1% error after the battery relaxes for 150 seconds. The other technique uses the short time constant in the equivalent model and predicts the equilibrium OCV with 2% error after the battery relaxes for 70 seconds. Both techniques of the logarithmic modeling method show improvement for estimating the equilibrium OCV in terms of waiting time compared to the standard methods.Applied Science, Faculty of
Graduate
32
Ghosh, Tirthankar. "Design of a fast and resource-efficient fault management system in optical networks to suit real-time multimedia applications." FIU Digital Commons, 2002. https://digitalcommons.fiu.edu/etd/3931.
Full textAbstract:
Today's telecommunications networks are relying more and more on optical fibers as their physical medium. Currently the Wavelength Division Multiplexing technology enables hundreds of wavelengths to be multiplexed on a single fiber. Using this technology capacity can be dramatically increased, even to the order of Terabits per second. While WDM technology has given a satisfactory answer to the ever-increasing demand for capacity, there is still a problem which needs to be handled efficiently: survivability.
Our proposed fault restoration system optimized between restoration cost and speed. We extended the concept of Forward Equivalence Class (FEC) in Multi Protocol Label switching (MPLS) to our proposed fault restoration system. Speed was found to be in the order of 1 to 3 microseconds using predesigned protection, depending on the configuration of the system. Optimization was done between restoration speed and cost by introducing a priority field in the packet header.
33
Bergstrand, Karin, and Viktor Appel. "Shorter project lead times in construction." Thesis, KTH, Fastigheter och byggande, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190278.
Full textAbstract:
The manufacturing industry has made an extensive journey through the last century when it comes to increasing productivity. Results in the construction industry end up far behind manufacturing and do not show anywhere near the same efficiency increase, improved quality or decreased costs. There are a lot of potential savings in the form of activities that consumes resources without creating value for the end customer, also called waste. Waste in combination with uncertainty and variability in task duration forces the project duration to be longer than necessary. The purpose of this study is to investigate the opportunity to shorten the lead time of a construction project and investigate how construction companies can work continuously towards shorter project lead times. The purpose has been fulfilled through a time study performed at four projects managed by one of the leading construction developers of residential buildings in Scandinavia. Waste and variability were mapped in the interior phase. The measured time for each activity was categorized either as; value adding time (VT), necessary but non-value adding time (NNVT) and non-value adding time (NVT). The results showed that mounting consists of 48 % VT, 28 % NNVT and 24 % NVT, while material handling consists of 0 % VT, 75 % NNVT and 25 % NVT. The results further showed large variability in task duration between the projects. Theory from lean, logistics and scheduling were combined to form three different scenarios for shortening project lead times. The first scenario describes how to work with removing waste from the process. The second scenario describes how to reduce variability and thus be able to reduce buffers in the time plan. The last scenario describes how support processes, for example material handling, can be removed from the critical path, in order to reduce project lead times. A proposal for a general approach for continuously working with decreasing project lead times is also presented. Central aspects for shortening project lead times were concluded to be the takt time, variability and risk. The proposed approach involves a combination of the three scenarios, where their impact on each other is considered.Tillverkningsindustrin har gjort en omfattande resa under det senaste århundradet när det gäller att öka produktiviteten, medan byggbranschen inte visar i närheten av samma ökning i effektivitet, förbättrad kvalitet eller minskade kostnader. Det finns många potentiella besparingar i form av aktiviteter som förbrukar resurser men som inte skapar något värde för kunden, även kallat slöserier. Slöserier i kombination med osäkerhet och variabilitet i arbetsmomentens varaktighet tvingar projektens ledtider att vara längre än nödvändigt. Syftet med denna studie är att undersöka möjligheten att förkorta byggprojekts ledtider och undersöka hur byggföretag kontinuerligt kan arbeta mot kortare ledtider. Syftet har uppfyllts med hjälp av en tidsstudie utförd på fyra projekt vid en av de ledande projektutvecklarna av bostadshus i Skandinavien. Slöserier och variabilitet i inredningsskedet har kartlagts. Den uppmätta tiden för varje aktivitet är kategoriserad efter; värdeskapande tid (VT), nödvändig men icke-värdeskapande tid (NIVT) och icke-värdeskapande tid (IVT). Resultaten visar att montering består av 48 % VT, 28 % NIVT och 24 % IVT, medan material hantering består av 0 % VT, 75 % NIVT och 25 % IVT. Vidare visar resultaten på stor variabilitet i varaktigheten av aktiviteter mellan projekten. Teori från lean, logistik och schemaläggning kombinerades för att bilda tre olika scenarier som kan användas för att förkorta projektens ledtider. Det första scenariot beskriver hur man kan arbeta med att eliminera slöserier från processen. Det andra beskriver hur man kan minska variabiliteten och därmed kunna minska buffertarna i tidplanen. Det sista scenariot beskriver hur stödprocesser, som t.ex. materialhantering, kan brytas ut från den kritiska linjen, i syfte att minska projektets ledtid. Ettförslag till ett generellt sätt att kontinuerligt arbeta med att minska projektens ledtider är ocksåframtaget och innehåller en kombination av de tre scenarierna. Det framkommer att centrala aspekterför att förkorta projektens ledtider är takttid, variabilitet och risk. Det föreslagna arbetssättetinnefattar en kombination av de tre scenarierna, där hänsyn tagits till deras inverkan på varandra.
34
Husák, Adam. "Zlepšení QMS organizace aplikací DMAIC." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230527.
Full textAbstract:
The aim of this master´s thesis is to design an action to improve of selected process Design and development through DMAIC application. The thesis is focused on identifying the problem, finding the cause and following design of improves leading to eliminate problems. This improves will enable the company to achieve time savings during the process and reduce a risk of orders. Result of this is effective operation in the process.
35
Jones, Taylor J. "Grapevine Viruses and Associated Vectors in Virginia: Survey, Vector Management, and Development of Efficient Grapevine Virus Testing Methods." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/81460.
Full textAbstract:
In order to aid the booming wine industry in the state of Virginia, U.S.A., we developed a series of studies to provide a deeper understanding of the viruses and vectors for management of virus diseases and development of better tools for grapevine virus diagnostics. A statewide survey for 14 different grapevine viruses between 2009 and 2014 was conducted: 721 samples were collected from 116 vineyards in the period. Among the 12 viruses identified, Grapevine leafroll associated virus-3 (GLRaV-3), Grapevine rupestris stem-pitting associated virus (GRSPaV), and Grapevine red blotch-associated virus (GRBaV) were most commonly present. A new real-time PCR method for the detection of the V2 gene of GRBaV was developed. The resulting method takes less time for more accurate diagnostics than conventional PCR. Evaluation of insecticide effectiveness on GLRaV-3 vectors (mealybugs) and the spread of GLRaV-3 were examined: Four trials conducted from 2012 to 2014 revealed that despite successful control of mealybugs, GLRaV-3 is spread at a very rapid rate. A new sampling technique for efficient nucleic acid storage and testing was developed: the nitrocellulose membrane-based method allows simpler extraction of nucleic acid and provides a storage medium that can hold viable RNA/DNA at room temperature for up to 18 months. An investigation of multiple virus-infected vines and the impact of these co-infections on grapevine fruit chemistry was conducted. GLRaV-3, GRBaV, GRSPaV, and co-infections of the 3 all negatively impacted Brix, pH, titratable acidity, and anthocyanin levels.Ph. D.
36
Idris, Muhammad [Verfasser], Wolfgang [Akademischer Betreuer] Lehner, Wolfgang [Gutachter] Lehner, Stijn [Akademischer Betreuer] Vansummeren, and Stijn [Gutachter] Vansummeren. "Real-time Business Intelligence through Compact and Efficient Query Processing Under Updates / Muhammad Idris ; Gutachter: Wolfgang Lehner, Stijn Vansummeren ; Wolfgang Lehner, Stijn Vansummeren." Dresden : Technische Universität Dresden, 2019. http://d-nb.info/1226899234/34.
Full text
37
Ghazar, Tay. "Efficient Virtual Network Embedding onto A Hierarchical-Based Substrate Network Framework." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23932.
Full textAbstract:
The current Internet architecture presents a barrier to accommodate the vigorous arising
demand for deploying new network services and applications. The next-generation architecture views the network virtualization as the gateway to overcome this limitation. Network virtualization promises to run efficiently and securely multiple dedicated virtual networks (VNs) over a shared physical infrastructure. Each VN is tailored to host a unique application based on the user’s preferences.
This thesis addresses the problem of the efficient embedding of multiple VNs onto a
shared substrate network (SN). The contribution of this thesis are twofold: First, a novel hierarchical SN management framework is proposed that efficiently selects the optimum VN mapping scheme for the requested VN from more than one proposed VN mapping candidates obtained in parallel. In order to accommodate the arbitrary architecture
of the VNs, the proposed scheme divides the VN request into smaller subgraphs, and
individually maps them on the SN using a variation of the exact subgraph matching
techniques.
Second, the physical resources pricing policy is introduced that is based on time-ofuse,
that reflects the effect of resource congestion introduced by VN users. The preferences of the VN users are first represented through corresponding demand-utility functions that quantify the sensitivity of the applications hosted by the VNs to resource consumption and time-of-use. A novel model of time-varying VNs is presented, where users are allowed to up- or down-scale the requested resources to continuously maximize their utility while minimizing the VNs embedding cost.
In contrast to existing solutions, the proposed work does not impose any limitations
on the size or topology of the VN requests. Instead, the search is customized according
to the VN size and the associated utility. Extensive simulations are then conducted to
demonstrate the improvement achieved through the proposed work in terms of network
utilization, the ratio of accepted VN requests and the SP profits.
38
Sermeño, Luis, Jimmy Orellana, Juan Eyzaguirre, and Carlos Raymundo. "Improvement of attention times and efficiency of container movements in a port terminal using a truck appointment system, LIFO management and Poka Yoke." Springer Verlag, 2020. http://hdl.handle.net/10757/656128.
Full textAbstract:
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.In the management of port terminals, a common problem has been evidenced, high traffic of trucks and long waiting times given the variability of trucks arrival. This is a significant challenge for ports. This situation has given the opportunity to investigate in this matter and make use of a Truck Appointment System (TAS) together with other tools corresponding to industrial engineering for the optimization of truck service processes within a port terminal in Peru. To do this, a diagnosis is made of the company object of study and through a simulation of discrete systems, the technical viability of the proposal is validated. It was demonstrated that a procedure of attention based on appointments, Last in, First Out (LIFO) management for containers and development of visual management within the container yard; it is a highly viable option to shorten waiting times and unproductive movements of containers.
39
Celebi, Emre. "MODELS OF EFFICIENT CONSUMER PRICING SCHEMES IN ELECTRICITY MARKETS." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/811.
Full textAbstract:
Suppliers in competitive electricity markets regularly respond to prices that change hour by hour or even more frequently, but most consumers respond to price changes on a very different time scale, i. e. they observe and respond to changes in price as reflected on their monthly bills. This thesis examines mixed complementarity programming models of equilibrium that can bridge the speed of response gap between suppliers and consumers, yet adhere to the principle of marginal cost pricing of electricity. It develops a computable equilibrium model to estimate the time-of-use (TOU) prices that can be used in retail electricity markets. An optimization model for the supply side of the electricity market, combined with a price-responsive geometric distributed lagged demand function, computes the TOU prices that satisfy the equilibrium conditions. Monthly load duration curves are approximated and discretized in the context of the supplier's optimization model. The models are formulated and solved by the mixed complementarity problem approach. It is intended that the models will be useful (a) in the regular exercise of setting consumer prices (i. e. , TOU prices that reflect the marginal cost of electricity) by a regulatory body (e. g. , Ontario Energy Board) for jurisdictions (e. g. , Ontario) where consumers' prices are regulated, but suppliers offer into a competitive market, (b) for forecasting in markets without price regulation, but where consumers pay a weighted average of wholesale price, (c) in evaluation of the policies regarding time-of-use pricing compared to the single pricing, and (d) in assessment of the welfare changes due to the implementation of TOU prices.
40
Ahmed, Muhammad Swilam Abdelhaleem. "Highly-efficient Low-Noise Buck Converters for Low-Power Microcontrollers." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1542277717997166.
Full text
41
Ahmed, Hagui Salem Ilham. "Conjuguer technologie de l’information et de communication et management de l’administration publique : le défi d'une formation administrative publique efficiente en République de Djibouti." Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST0006.
Full textAbstract:
Le thème de cette thèse relève du domaine de la formation tout au long de la vie professionnelle des agents administratifs de l’Etat djiboutien et plus particulièrement de l’usage des TICE. En effet, la place des TICE dans la formation des adultes, est devenue un moyen important de modernisation pédagogique et de mode de transmission de connaissances à des publics plus vastes. On assiste à un phénomène très important de convergence des enseignements présentiel et à distance dans le monde. Beaucoup des Ecoles Nationales de l’Administration (ENA), notamment ceux des pays industrialisés, consacrent aujourd'hui des moyens humains et financiers très importants à l'enseignement numérique. Elles utilisent ce système pour enrichir leur enseignement présentiel et parfois aussi pour offrir des programmes à distance.Il s’agit donc d’étudier l’environnement de ce système dans sa complexité en prenant en compte ses spécifications (pédagogiques et fonctionnelles) mais aussi sa dynamique, sa mise en œuvre et son exploitation. Nous allons étudier en particulier les dimensions technologiques éducatives et la diversification des modes et méthodes pédagogiques en formation d’adultes afin d’en proposer et de l’adapter au contexte djiboutien.Ainsi, il s’agit de trouver des indices et des critères de prise de décision stratégique pour renforcer les compétences de la ressource humaine de l’administration publique djiboutienneThe theme of this thesis within the field of training throughout the working lives of administrative officers of the state of Djibouti and in particular the use of ICT.Indeed, the role of ICT in adult education, has become an important means to modernize teaching and mode of transmission of knowledge to wider audiences. There has been a very important phenomenon of convergence and distance learning worldwide. Many of the National School of Administration (ENA), including those of industrialized countries now devote human and financial resources very important to teach digital. They use this system to enrich their classroom teaching and sometimes also to provide programs remotely.It is therefore to study the environment of this system in its complexity, taking into account its specifications (educational and functional), but also its dynamics, its implementation and operation. We will consider in particular the educational and technological dimensions of alternative teaching methods and training of adults in order to propose and to adapt to the context of Djibouti.Thus, it is to find clues and criteria for strategic decision making to enhance the skills of human resources of the government of Djibouti
42
Peres, Martin. "A holistic approach to green networking in wireless networks : collaboration among autonomic systems as a mean towards efficient resource-sharing." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0433/document.
Full textAbstract:
Les vingt dernières années ont vu l’émergence de systèmes sans fil dans la vie de tous les jours. Ils ont rendu possible la création de technologies telles que les téléphones portables, le WiFi ou l’internet mobile qui sont maintenant tenus pour acquis dans la société actuelle. L’impact environnemental des technologies de l’information et des communications connaît une croissance exponentielle et a atteint l’impact de l’industrie du transport aérien. L’initiative d’informatique verte a été lancée en réponse à cette observation pour réduire de 15 à 30% les émissions de gaz à effet de serre en 2020 comparé aux prédictions faites en 2002 afin de garder le réchauffement climatique inférieur à 2°C. Dans cette thèse, nous avons étudié des techniques d’économie d’énergie dans les réseaux sans fil et comment elles interagissent entre elles afin de donner une vue holistique des réseaux verts. Nous prenons également en compte l’usage du spectre radio fréquence qui est le moyen le plus utilisé pour les communications entre systèmes sans fil et qui devient une ressource rare à cause du besoin grandissant de notre société pour de la bande passante en mobilité. Cette thèse suit les couches réseaux avant de remonter les piles matérielleset logicielles. Des contributions ont été apportées à la plupart des couches afin de proposer un réseau sans fil autonome où les noeuds peuvent collaborer pour améliorer les performances du réseau, réduire de façon globale l’utilisation du spectre radio tout en limitant la consommation énergétique du réseauThe last twenty years saw the emergence of wireless systems in everyday’s life. They made possible technologies such as mobile phones, WiFi or mobile Internet which are now taken for granted in today’s society. The environmental impact of Information and Communications Technology (ICT) has been raising exponentially to equate the impact of the airline industry. The green computing initiative has been created in response to this observation in order to meet the 15%-30% reduction in green-house gases by 2020 compared to estimations made in 2002 to keep the global temperature increasebelow 2°C. In this thesis, we studied power-saving techniques in wireless networks and how they interact with each others to provide a holistic view of green networking. We also take into account the radio frequency resource which is the most commonly usedcommunication medium for wireless systems and is becoming a scarce resource due to our society’s ever-increasing need for mobile bandwidth. This thesis goes down the network stacks before going up the hardware and software stack. Contributions have been madeat most layers in order to propose an autonomic wireless network where nodes can work collaboratively to improve the network’s performance, globally reduce the radio frequency spectrum usage while also increasing their battery life
43
Eriksson, Jonathan. "Towards a more efficient Supply Chain : A study at Bombardier Rail Control Solutions with a focus on centralizing their Supply Chain." Thesis, KTH, Industriell produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226163.
Full textAbstract:
To remain competitive in today’s business environment, companies must continuously become more efficient and improve their business. This can be achieved through developing and streamlining a company's Supply Chain. Bombardier Rail Control Solutions (RCS) has grown mainly through acquisitions, however, the acquisitions have not been integrated in a good way into their existing Supply Chain. This has result in a decentralized Supply Chain where RCS’s different sites are using different ERP systems. The consequence of this has led to an increased manual workload, a lack of visibility between sites and an inefficient Supply Chain. The goal of this project has been to identify how Bombardier RCS can develop and streamline its Supply Chain by centralizing different parts of it, e.g. ERP systems and different processes. To achieve this, there has been a close collaboration with Bombardier through the project through interviews, meetings, discussions together with studying literature. In addition, presentations have been presented continuously to ensure that the results have followed Bombardier RCS’s goal. RCS’s historical data has also been analyzed. Based on the above-mentioned methods, several problems have been solved and improvement areas have been identified. Issues that have been solved include centralizing master data and how to centralize processes at Bombardier RCS. Improvement areas include the benefits of centralizing Bombardier RCS Supply Chain and the advantages with a central warehouse. Bombardier RCS should also centralize their entire ERP system to enable global MRP calculations and so on. Furthermore, it has been identified that there is an improvement potential regarding Bombardier RCS's delivery performance, which can be solved by either integrating RCS’s Supply Chain or/and through keeping products on stock. The conclusion is that Bombardier RCS should centralize their Supply Chain step by step since it is impossible to centralize everything at once. By centralizing the Supply Chain, this can reduce manual workload, create visibility between different sites, contribute to a better delivery performance and streamline the Supply Chain. By doing this, Bombardier RCS can get more competitive, which can contribute to a continued strong market position in the industry.För att vara konkurrenskraftig i dagens företagsklimat måste företag ständigt förbättras och bli effektivare. Detta kan uppnås bland annat genom att utveckla och effektivisera ett företags värdekedja. Bombardier Rail Control Soutions (RCS) har växt framförallt genom företagsförvärv, dock har förvärven inte integrerats på ett bra sätt in i den existerande värdekedjan. Detta har resulterat i en decentraliserad värdekedja där RCS:s olika arbetsplatser använder olika ERP system. Konsekvensen av detta har lett till en ökande manuell arbetsbelastning, brist på synlighet mellan siter och en ineffektiv värdekedja. Målsättningen med det här projektet har varit att identifiera hur Bombardier RCS kan utveckla och effektivisera sin värdekedja genom att centralisera olika delar av den, exempelvis ERP system och olika processer. För att uppnå detta har ett nära samarbete med Bombardier genom projektet varit centralt med intervjuer, möten och diskussioner, tillsammans med en litteraturstudie. Dessutom har presentationer framförts kontinuerligt för att säkerställa att resultaten följt Bombardier RCS:s mål. RCS:s historiska data har också analyserats. Utifrån ovannämnda metoder har flera problem löst och förbättringsområden har identifierats. Problem som har lösts är bland annat att centralisera RCS:s masterdata och hur man kan centralisera processer hos Bombardier RCS. Förbättringsområden är bland annat fördelarna med att centralisera Bombardier RCS:s värdekedja och vinsterna med ett centrallager. Bombardier RCS bör även centralisera deras ERP-system för att möjliggöra globala MRP-beräkningar och så vidare. Vidare har det identifierats att det finns en förbättringspotential för Bombardier RCS:s leveransprecision som kan lösas dels med att integrera värdekedjan (med leverantörer) eller/och lagerlägga artiklar. Slutsatsen är att Bombardier RCS bör centralisera sin värdekedja stegvis eftersom det är omöjligt att centralisera allt på en gång. Genom en centraliserad värdekedja kan det minimera den manuella arbetsbelastningen, skapa visibilitet mellan olika arbetsplatser, bidra till en bättre leveransprecision och effektivisera värdekedjan. Genom att göra detta kommer Bombardier RCS bli mer konkurrenskraftig, vilket kommer bidra till en fortsatt stark marknadsposition i branschen.
44
Petit, Nicolas. "Le contrôle de gestion logistique hospitalier : pratiques de performance et modélisation des coûts en TDABC." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00938271.
Full textAbstract:
De nombreuses recherches sont effectuées dans le domaine de la santé et concernent plus particulièrement les hôpitaux. Ceux-ci sont de vastes organisations et recensent de multiples métiers, de nombreuses activités autres que celle du soin apporté au patient. L'originalité de cette recherche consiste à se positionner vis-à-vis de l'une des fonctions support, la logistique hospitalière, et d'analyser en quoi celle-ci peut contribuer à l'amélioration de la performance financière de nos hôpitaux, ainsi qu'à la résolution des défis de nature économique qui lui sont posés. Cette thèse étudie d'abord comment définir et évaluer la performance logistique hospitalière. Elle analyse également les outils de gestion traitant de la performance logistique présents au sein des établissements de santé français. Suivent des monographies de nature exploratoire et une étude statistique auprès d'une centaine de responsables logistiques d'hôpitaux afin d'observer les pratiques développées et les difficultés rencontrées par ces professionnels. Nous appliquons enfin la méthode Time-Driven Activity Based Costing au service de transport d'un établissement ; des équations de temps nous permettent d'affiner les coûts et optimisent le contrôle de gestion opérationnel de l'activité logistique. Les réponses apportées par le contrôle de gestion aux lacunes observées au sein de la littérature et exprimées dans l'étude statistique sont analysées
45
Nosjean, Nicolas. "Management et intégration des risques et incertitudes pour le calcul de volumes de roches et de fluides au sein d’un réservoir, zoom sur quelques techniques clés d’exploration Integrated Post-stack Acoustic Inversion Case Study to Enhance Geological Model Description of Upper Ordovicien Statics : from imaging to interpretation pitfalls and an efficient way to overcome them Improving Upper Ordovician reservoir characterization - an Algerian case study Tracking Fracture Corridors in Tight Gas Reservoirs : An Algerian Case Study Integrated sedimentological case study of glacial Ordovician reservoirs in the Illizi Basin, Algeria A Case Study of a New Time-Depth Conversion Workflow Designed for Optimizing Recovery Proper Systemic Knowledge of Reservoir Volume Uncertainties in Depth Conversion Integration of Fault Location Uncertainty in Time to Depth Conversion Emergence of edge scenarios in uncertainty studies for reservoir trap analysis Enhancing geological model with the use of Spectral Decomposition - A case study of a prolific stratigraphic play in North Viking Graben, Norway Fracture corridor identification through 3D multifocusing to improve well deliverability, an Algerian tight reservoir case study Geological Probability Of Success Assessment for Amplitude-Driven Prospects, A Nile Delta Case Study." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS085.
Full textAbstract:
En tant que géoscientifique dans le domaine de l’Exploration pétrolière et gazière depuis une vingtaine d’années, mes fonctions professionnelles m’ont permis d’effectuer différents travaux de recherche sur la thématique de la gestion des risques et des incertitudes. Ces travaux de recherche se situent sur l’ensemble de la chaîne d’analyse Exploration, traitant de problématiques liées à l’acquisition et au traitement sismique, jusqu’au placement optimal de forages d’exploration. Un volet plus poussé de mes travaux s’est orienté sur la gestion des incertitudes géophysiques en Exploration pétrolière, là où l’incertitude est la plus importante et paradoxalement la moins travaillée.On peut regrouper mes travaux de recherche en trois grands domaines qui suivent les grandes étapes du processus Exploration : le traitement sismique, leur interprétation, et enfin l'analyse et l'extraction des différentes incertitudes qui vont nous permettre de calculer les volumes d’hydrocarbures en place et récupérables, ainsi que l’analyse de ses risques associés. L’ensemble des travaux de recherche ont été appliqués avec succès sur des cas d’études opérationnelles. Après avoir introduit quelques notions générales et détaillé les grandes étapes du processus Exploration et leur lien direct avec ces problématiques, je présenterai quatre grands projets de recherche sur un cas d’étude algérienIn the last 20 years, I have been conducting various research projects focused on the management of risks and uncertainties in the petroleum exploration domain. The various research projects detailed in this thesis are dealing with problematics located throughout the whole Exploration and Production chain, from seismic acquisition and processing, until the optimal exploration to development wells placement. Focus is made on geophysical risks and uncertainties, where these problematics are the most pronounced and paradoxically the less worked in the industry. We can subdivide my research projects into tree main axes, which are following the hydrocarbon exploration process, namely: seismic processing, seismic interpretation thanks to the integration with various well informations, and eventually the analysis and extraction of key uncertainties, which will be the basis for the optimal calculation of in place and recoverable volumes, in addition to the associated risk analysis on a given target structure. The various research projects that are detailed in this thesis have been applied successfully on operational North Africa and North Sea projects. After introducing risks and uncertainty notions, we will detail the exploration process and the key links with these issues. I will then present four major research projects with their theoretical aspects and applied case study on an Algerian asset
46
Teng, Sin Yong. "Intelligent Energy-Savings and Process Improvement Strategies in Energy-Intensive Industries." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-433427.
Full textAbstract:
S tím, jak se neustále vyvíjejí nové technologie pro energeticky náročná průmyslová odvětví, stávající zařízení postupně zaostávají v efektivitě a produktivitě. Tvrdá konkurence na trhu a legislativa v oblasti životního prostředí nutí tato tradiční zařízení k ukončení provozu a k odstavení. Zlepšování procesu a projekty modernizace jsou zásadní v udržování provozních výkonů těchto zařízení. Současné přístupy pro zlepšování procesů jsou hlavně: integrace procesů, optimalizace procesů a intenzifikace procesů. Obecně se v těchto oblastech využívá matematické optimalizace, zkušeností řešitele a provozní heuristiky. Tyto přístupy slouží jako základ pro zlepšování procesů. Avšak, jejich výkon lze dále zlepšit pomocí moderní výpočtové inteligence. Účelem této práce je tudíž aplikace pokročilých technik umělé inteligence a strojového učení za účelem zlepšování procesů v energeticky náročných průmyslových procesech. V této práci je využit přístup, který řeší tento problém simulací průmyslových systémů a přispívá následujícím: (i)Aplikace techniky strojového učení, která zahrnuje jednorázové učení a neuro-evoluci pro modelování a optimalizaci jednotlivých jednotek na základě dat. (ii) Aplikace redukce dimenze (např. Analýza hlavních komponent, autoendkodér) pro vícekriteriální optimalizaci procesu s více jednotkami. (iii) Návrh nového nástroje pro analýzu problematických částí systému za účelem jejich odstranění (bottleneck tree analysis – BOTA). Bylo také navrženo rozšíření nástroje, které umožňuje řešit vícerozměrné problémy pomocí přístupu založeného na datech. (iv) Prokázání účinnosti simulací Monte-Carlo, neuronové sítě a rozhodovacích stromů pro rozhodování při integraci nové technologie procesu do stávajících procesů. (v) Porovnání techniky HTM (Hierarchical Temporal Memory) a duální optimalizace s několika prediktivními nástroji pro podporu managementu provozu v reálném čase. (vi) Implementace umělé neuronové sítě v rámci rozhraní pro konvenční procesní graf (P-graf). (vii) Zdůraznění budoucnosti umělé inteligence a procesního inženýrství v biosystémech prostřednictvím komerčně založeného paradigmatu multi-omics.
47
Mallangi, Siva Sai Reddy. "Low-Power Policies Based on DVFS for the MUSEIC v2 System-on-Chip." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229443.
Full textAbstract:
Multi functional health monitoring wearable devices are quite prominent these days. Usually these devices are battery-operated and consequently are limited by their battery life (from few hours to a few weeks depending on the application). Of late, it was realized that these devices, which are currently being operated at fixed voltage and frequency, are capable of operating at multiple voltages and frequencies. By switching these voltages and frequencies to lower values based upon power requirements, these devices can achieve tremendous benefits in the form of energy savings. Dynamic Voltage and Frequency Scaling (DVFS) techniques have proven to be handy in this situation for an efficient trade-off between energy and timely behavior. Within imec, wearable devices make use of the indigenously developed MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). This system is optimized for efficient and accurate collection, processing, and transfer of data from multiple (health) sensors. MUSEIC v2 has limited means in controlling the voltage and frequency dynamically. In this thesis we explore how traditional DVFS techniques can be applied to the MUSEIC v2. Experiments were conducted to find out the optimum power modes to efficiently operate and also to scale up-down the supply voltage and frequency. Considering the overhead caused when switching voltage and frequency, transition analysis was also done. Real-time and non real-time benchmarks were implemented based on these techniques and their performance results were obtained and analyzed. In this process, several state of the art scheduling algorithms and scaling techniques were reviewed in identifying a suitable technique. Using our proposed scaling technique implementation, we have achieved 86.95% power reduction in average, in contrast to the conventional way of the MUSEIC v2 chip’s processor operating at a fixed voltage and frequency. Techniques that include light sleep and deep sleep mode were also studied and implemented, which tested the system’s capability in accommodating Dynamic Power Management (DPM) techniques that can achieve greater benefits. A novel approach for implementing the deep sleep mechanism was also proposed and found that it can obtain up to 71.54% power savings, when compared to a traditional way of executing deep sleep mode.Nuförtiden så har multifunktionella bärbara hälsoenheter fått en betydande roll. Dessa enheter drivs vanligtvis av batterier och är därför begränsade av batteritiden (från ett par timmar till ett par veckor beroende på tillämpningen). På senaste tiden har det framkommit att dessa enheter som används vid en fast spänning och frekvens kan användas vid flera spänningar och frekvenser. Genom att byta till lägre spänning och frekvens på grund av effektbehov så kan enheterna få enorma fördelar när det kommer till energibesparing. Dynamisk skalning av spänning och frekvens-tekniker (såkallad Dynamic Voltage and Frequency Scaling, DVFS) har visat sig vara användbara i detta sammanhang för en effektiv avvägning mellan energi och beteende. Hos Imec så använder sig bärbara enheter av den internt utvecklade MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). Systemet är optimerat för effektiv och korrekt insamling, bearbetning och överföring av data från flera (hälso) sensorer. MUSEIC v2 har begränsad möjlighet att styra spänningen och frekvensen dynamiskt. I detta examensarbete undersöker vi hur traditionella DVFS-tekniker kan appliceras på MUSEIC v2. Experiment utfördes för att ta reda på de optimala effektlägena och för att effektivt kunna styra och även skala upp matningsspänningen och frekvensen. Eftersom att ”overhead” skapades vid växling av spänning och frekvens gjordes också en övergångsanalys. Realtidsoch icke-realtidskalkyler genomfördes baserat på dessa tekniker och resultaten sammanställdes och analyserades. I denna process granskades flera toppmoderna schemaläggningsalgoritmer och skalningstekniker för att hitta en lämplig teknik. Genom att använda vår föreslagna skalningsteknikimplementering har vi uppnått 86,95% effektreduktion i jämförelse med det konventionella sättet att MUSEIC v2-chipets processor arbetar med en fast spänning och frekvens. Tekniker som inkluderar lätt sömn och djupt sömnläge studerades och implementerades, vilket testade systemets förmåga att tillgodose DPM-tekniker (Dynamic Power Management) som kan uppnå ännu större fördelar. En ny metod för att genomföra den djupa sömnmekanismen föreslogs också och enligt erhållna resultat så kan den ge upp till 71,54% lägre energiförbrukning jämfört med det traditionella sättet att implementera djupt sömnläge.
48
LI, CHUAN-TENG, and 黎傳騰. "Economic Efficiency of Real-time Information Management-A Case Study of Photomask Corp." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/66019543382261913494.
Full textAbstract:
碩士逢甲大學
經營管理碩士在職專班
98
Real-time production information inquiry system is created that has combined the system with concepts as flow automation, enterprise application integration, and collaboration, using the flow process of each station as its center, not to mention its surveillance and prediction capability. As such, it has not only simplified manpower and time, but also enterprise competitiveness. The inquiry system has, on one had, resolve countless information problems of enterprise, it has, on the other hand, helped user to casually discovered the hub of problem. Most of all, the system provide the enterprise with a platform of work implementation and management that transcends space and time, largely boosting the operation efficiency and lowering management cost of enterprise. The primary purpose of this thesis study is based on the premise enhancing the management efficiency of light cover industry, while the inquiry system developed would primarily focus on the its immediacy, accuracy, and convenience.
49
Tao, Qing. "A Comparison of Waterflood Management Using Arrival Time Optimization and NPV Optimization." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7238.
Full textAbstract:
Waterflooding is currently the most commonly used method to improve oil recovery
after primary depletion. The reservoir heterogeneity such as permeability distribution
could negatively affect the performance of waterflooding. The presence of high
permeability streaks could lead to an early water breakthrough at the producers and thus
reduce the sweep efficiency in the field. One approach to counteract the impact of
heterogeneity and to improve waterflood sweep efficiency is through optimal rate
allocation to the injectors and producers. Through optimal rate control, we can manage
the propagation of the flood front, delay water breakthrough at the producers and also
increase the sweep and hence, the recovery efficiency. The arrival time optimization
method uses a streamline-based method to calculate water arrival time sensitivities with
respect to production and injection rates. It can also optimize sweep efficiency on
multiple realizations to account for geological uncertainty. To extend the scope of this
optimization method for more general conditions, this work utilized a finite difference
simulator and streamline tracing software to conduct the optimization.
Apart from sweep efficiency, another most widely used optimization method is
to maximize the net present value (NPV) within a given time period. Previous efforts on
optimization of waterflooding used optimal control theorem to allocate
injection/production rates for fixed well configurations. The streamline-based approach
gives the optimization result in a much more computationally efficient manner.
In the present study, we compare the arrival time optimization and NPV
optimization results to show their strengths and limitations. The NPV optimization uses
a perturbation method to calculate the gradients. The comparison is conducted on a 4-
spot synthetic case. Then we introduce the accelerated arrival time optimization which
has an acceleration term in the objective function to speed up the oil production in the
field. The proposed new approach has the advantage of considering both the sweep
efficiency and net present value in the field.
50
LEE, HSIU-CHUN, and 李秀君. "A Study on the Relationship between Elementary School Tutors’ Time Management and Efficiency of Classroom Management in New Taipei City." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/mqjdu5.
Full textAbstract:
碩士中華大學
企業管理學系
107
ABSTRACT The purpose of this study is to investigate the current situation of time management and classroom management efficiency of the elementary school’s tutors in New Taipei City, analyze the differences between time management and classroom management efficiency of tutors in different background variables, and explore the correlation between time management and classroom operation efficiency for the elementary school’s tutors and the predictive power of time management. The study adopts the questionnaire survey method to collect the date and uses descriptive statistics, independent sample t-test, one-way analysis of variance (ANOVA), Pearson product-moment correlation, and stepwise multiple regression analysis to implement statistical analysis. The study obtains the following conclusions: 1.Tutors’ time management at elementary schools in New Taipei City is good. The best performance is “time planning and mastering“and a slightly worse performance is “information and tools application“. 2.Tutors’ classroom performance is good. The best performance is the “class atmosphere“and the performance of “student learning effectiveness“ is slightly worse. 3.Tutors’ genders, education, marital status, teaching years, and years of tutoring are significantly differences in time management. 4.Tutors’ genders, education, marital status, teaching years, and years of tutoring are significantly differences in classroom management. 5.There is a significantly positive correlation between time management and classroom management effectiveness for tutors. 6.Tutors’ time management has predictive power on classroom management efficiency and other structures.