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Shen, Su 1973. "Logistics service network design : models, algorithms, and applications." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29424.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.<br>Includes bibliographical references (leaves 177-186).<br>Service network design is critical to the profitability of express shipment carriers. In this thesis, we consider two challenging problems associated with designing networks for express shipment service. The first problem is to design an integrated network for premium and deferred services simultaneously. Related existing models adapted to this problem are intractable for realistic instances of this problem: computer memory requirements and solution times are excessive. We introduce a disaggregate information-enhanced column generation approach for this problem that reduces the number of variables to be considered in the integer program from hundreds of thousands to only thousands, allowing us to solve previously unsolvable problem instances. The second problem is to determine the express package service network design in its entirety, including aircraft routings, fleet assignments, and package flow routings, including hub assignments. Existing models applied to this problem have weak associated linear programming bounds and hence, fail to produce quality feasible solutions. For example, for a small network design problem instance it takes days to produce a feasible solution that is provably near- optimal using the best performing existing model. To overcome these tractability challenges, we introduce a new model, referred to as the gateway cover and flow formulation. Applying our new formulation to the same network design instance, it takes only minutes to find an optimal solution.<br>(cont.) Applying our disaggregate information-enhanced column generation approach and gateway cover and flow formulation and solution approach to the network design problems of a large express package service provider, we demonstrate tens of millions of dollars in potential annual operating cost savings and reductions in the numbers of aircraft needed to perform the service. Moreover, we illustrate that, though designed for tactical planning, our new model and solution approach can provide insights for strategic decision-making, such as hub opening/closure, hub capacity expansion, and fleet composition and size.<br>by Su Shen.<br>Ph.D.
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Kim, Daeki. "Large scale transportation service network design : models, algorithms and applications." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10366.
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Kim, Hojung. "Human centred design of software agent in social network service against privacy concerns." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12165.
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The rapid growth and influence of social network services has led many scholars to focus on privacy issues. However, the research described in this thesis was motivated by the small number of design studies that have focused on practical approaches to identifying tacit information from users’ instant non-verbal responses to privacy issues. The research therefore aimed to propose persona models as a design solution for software agent development based on the analysis of users’ emotional and behavioural responses, so as to address privacy issues in social network services. In the definition phase, 21 stakeholders belonging to three key stakeholder groups were recruited for unstandardised semistructured email interviews. Three main considerations for the design of software agents in social network services emerged from the interviews, which were classified into the following categories: comprehensive understanding of users’ perceptions of privacy; user type recognition algorithm for software agent development; and existing software agent enhancement. In the development phase, 50 participants were recruited for the Facebook case study, which included three research strategies: perceptions of privacy questionnaire for user typology; emotional response measurement using Geneva Emotion Wheel; and behavioural response observation using a contextual inquiry method. The participants were classified into four user types by means of cluster analysis: uninformed, trustful, suspicious and neglectful. Each user type’s key emotional responses were identified using Kruskal-Wallis test and Mann-Whitney U test, and key behavioural responses using affinity diagrams. This generated persona models of each user type that reflected the correlations between users’ perceptions of privacy, key emotional responses and key behavioural responses. Two fundamental features of the software agent were also proposed based on the persona models: confirmation and guidance. In the validation phase, software agent prototypes were created based on the proposed persona models. A total of 206 participants completed the online survey which included two sections: perceptions of privacy questionnaire for user typology replication, and key emotional responses measurement before and after the intervention of the software agent prototypes. Cluster analysis replication validated the proposed user typology, and Wilcoxon signed-rank test of key emotional responses validated the proposed persona models. By implementing the research outcomes, the software agent described in this thesis would be able to provide users with appropriate services based on their user types, to reduce the number of those who are still unaware of privacy practice and those who neglect their accounts, and to expand the size of a user group pursuing sound relationships.
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França, César Levy. "Business Model Design for Strategic Sustainable Development." Doctoral thesis, Blekinge Tekniska Högskola, Institutionen för strategisk hållbar utveckling, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13674.
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Humanity confronts an existential threat without historic precedent. Environmental pressures have reached such intensity and pace of change that the earth system may be irreversibly tipped into a new and unpredictable state. The emerging global reality is, in turn, redefining overall conditions for business success. Addressing these challenges both demands and brings great opportunities for innovation. An important and sometimes neglected aspect of innovation is the design or redesign of business models, which has been identified as a greater source of lasting competitive advantage than new products and services per se. The business model has also been suggested as a new unit of analysis when discussing sustainability. However, this is still a relatively underexplored area. The aim of this work was therefore to develop an approach to business model design that supports strategic sustainable development, i.e., supports organizations to contribute to society’s transition towards sustainability in a way that strengthens the organization. To be able to design a business model that supports strategic sustainable development, it is necessary to know what sustainability is and how to develop sustainability-promoting, economically viable strategies. Therefore, the Framework for Strategic Sustainable Development, which includes, e.g., an operational definition of sustainability and strategic guidelines for how to approach it, was used as an overarching framework. Specific research methods and techniques included, e.g., literature reviews, questionnaires, interviews, work with focus groups, participatory action research with partner organizations, creative problem solving techniques, modeling, and simulation. The literature reviews revealed potential sustainability benefits of developing business models in conjunction with product-service systems (PSS). However, a knowledge gap exists regarding how to effectively connect these fields. Arguably, PSS strategies can best contribute to sustainability when business models support their implementation and when both the business models and the PSS strategies are guided by an understanding of strategic sustainable development. Therefore, an integrated approach to Business Model Design for Strategic Sustainable Development was co-developed and tested in PSS innovation work with partners, e.g., companies within the energy and lighting sectors. The tests indicated that the new approach helped to clarify strengths and weaknesses of current business models from a strategic sustainability perspective; to transform an organization’s vision and strategy into a sustainability-framed vision and a sustainability-promoting strategy; and to communicate the new vision and strategy to the value network as a basis for engaging important stakeholders in the change. For example, the approach supported one of the partner companies in its transformation towards providing sustainable PSS solutions in the form of light as a service. Examples of business benefits of the new approach include improved scalability and risk avoidance, which provide a foundation for better investment strategies. Benefits also include improved differentiability and a broadened view on, and a more solid foundation for, collaboration with stakeholders that are increasingly important to sustainable business success.
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Wu, Fei. "Electric Vehicle Charging Network Design and Control Strategies." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1479900508609434.
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Oosthuizen, Louzanne. "A location science model for the placement of POC CD4 testing devices as part of South Africa's public healthcare diagnostic service delivery model." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96972.
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Thesis (MEng)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: South Africa has a severe HIV (human immunodeficiency virus) burden and
the management of the disease is a priority, especially in the public healthcare
sector. One element of managing the disease, is determining when to
initiate an HIV positive individual onto anti-retroviral therapy (ART), a
treatment that the patient will remain on for the remainder of their lifetime.
For the majority of HIV positive individuals in the country, this
decision is governed by the results of a CD4 (cluster of differentiation 4)
test that is performed at set time intervals from the time that the patient
is diagnosed with HIV until the patient is initiated onto ART. A device
for CD4 measurement at the point of care (POC), the Alere PIMA™, has
recently become commercially available. This has prompted a need to evaluate
whether CD4 testing at the POC (i.e. at the patient serving healthcare
facility) should be incorporated into the South African public healthcare
sector's HIV diagnostic service provision model.
One challenge associated with the management of HIV in the country is the
relatively large percentage of patients that are lost to follow-up at various
points in the HIV treatment process. There is extensive evidence that
testing CD4 levels at the POC (rather than in a laboratory, as is the current
practice) reduces the percentage of patients that are lost to follow-up before
being initiated onto ART. Therefore, though POC CD4 testing is more
expensive than laboratory-based CD4 testing, the use of this technology in
South Africa should be investigated for its potential to positively influence
health outcomes.
In this research, a multi-objective location science model is used to generate
scenarios for the provision of CD4 testing capability. For each scenario,
CD4 testing provision at 3 279 ART initiation facilities is considered. For
each facility, either (i) a POC device is placed at the site; or (ii) the site's testing workload is referred to one of the 61 CD4 laboratories in the country.
To develop this model, the characteristics of eight basic facility location
models are compared to the attributes of the real-world problem in order to
select the most suitable one for application. The selected model's objective,
assumptions and inputs are adjusted in order to adequately model the realworld
problem. The model is solved using the cross-entropy method for
multi-objective optimisation and the results are verified using a commercial
algorithm.
Nine scenarios are selected from the acquired Pareto set for detailed presentation.
In addition, details on the status quo as well as a scenario where
POC testing is used as widely as possible are also presented. These scenarios
are selected to provide decision-makers with information on the range
of options that should be considered, from no or very limited use to widespread
use of POC testing. Arguably the most valuable contribution of
this research is to provide an indication of the optimal trade-off points
between an improved healthcare outcome due to POC CD4 testing and
increased healthcare spending on POC CD4 testing in the South African
public healthcare context. This research also contributes to the location
science literature and the metaheuristic literature.<br>AFRIKAANSE OPSOMMING: Suid-Afrika gaan gebuk onder `n swaar MIV- (menslike-immuniteitsgebreksvirus-)
las en die bestuur van die siekte is `n prioriteit, veral in die openbare
gesondheidsorgsektor. Een element in die bestuur van die siekte is om te
bepaal wanneer `n MIV-positiewe individu met antiretrovirale- (ARV-)behandeling
behoort te begin, waarop pasiënte dan vir die res van hul lewens
bly. Vir die meeste MIV-positiewe individue in die land word hierdie besluit
bepaal deur die uitslae van `n CD4- (cluster of differentiation 4-)toets wat
met vasgestelde tussenposes uitgevoer word vandat die pasiënt met MIV
gediagnoseer word totdat hy of sy met ARV-behandeling begin. `n Toestel
vir CD4-meting by die punt van sorg (\POC"), die Alere PIMA™, is onlangs
kommersieel beskikbaar gestel. Dit het `n behoefte laat ontstaan om
te bepaal of CD4-toetsing by die POC (met ander woorde, by die gesondheidsorgfasiliteit
waar die pasiënt bedien word) by die MIV-diagnostiese
diensleweringsmodel van die Suid-Afrikaanse openbare gesondheidsorgsektor
ingesluit behoort te word.
Een uitdaging met betrekking tot MIV-bestuur in die land is die betreklik
groot persentasie pasiënte wat verlore gaan vir nasorg in die verskillende
stadiums van die MIV-behandelingsproses. Heelwat bewyse dui daarop dat
die toetsing van CD4-vlakke by die POC (eerder as in `n laboratorium, soos
wat tans die praktyk is) die persentasie pasiënte wat verlore gaan vir nasorg
voordat hulle met ARV-behandeling kan begin, verminder. Daarom, hoewel
CD4-toetsing by die POC duurder is as toetsing in `n laboratorium, behoort
die gebruik van hierdie tegnologie in Suid-Afrika ondersoek te word.
In hierdie studie is `n meerdoelige liggingswetenskapmodel gebruik om scenario's
vir die voorsiening van CD4-toetsvermoë te skep. Vir elke scenario
word CD4-toetsvermoë by 3 279 ARV-inisiasie fasiliteite oorweeg. Vir elke
fasiliteit word toetsvermoë verskaf deur (i) die plasing van POC-toestelle by die fasiliteit, of (ii) verwysing vir laboratoriumgebaseerde toetsing by een
van die 61 CD4-laboratoriums in die land. Die kenmerke van agt basiese
fasiliteitsliggingsmodelle is met die kenmerke van die werklike probleem
vergelyk om die mees geskikte model vir toepassing op die werklike probleem
te bepaal. Die doelwitte, aannames en insette van die gekose model
is daarna aangepas om die werklike probleem voldoende te modelleer. Die
model is opgelos met behulp van die kruis-entropie-metode vir meerdoelige
optimering, waarna die resultate deur middel van `n kommersiële algoritme
bevestig is.
Nege scenario's uit die verworwe Pareto-stel word uitvoerig aangebied. Daarbenewens
beskryf die studieresultate die besonderhede van die status quo
sowel as `n scenario waar POC-toetsing so wyd moontlik gebruik word. Hierdie
scenario's word aangebied om besluitnemers van inligting te voorsien
oor die verskeidenheid moontlikhede wat oorweeg kan word, wat wissel van
geen of baie beperkte tot wydverspreide gebruik van POC-toetsing. Die
mees beduidende bydrae van hierdie navorsing is stellig dat dit `n aanduiding
bied van die optimale kompromie tussen `n verbeterde gesondheidsorguitkoms
weens CD4-toetsing by die POC, en verhoogde gesondheidsorgbesteding
aan CD4-toetsing by die POC, in die konteks van Suid-Afrikaanse
openbare gesondheidsorg. Die navorsing dra ook by tot die ligingswetenskapliteratuur
sowel as tot die metaheuristiekliteratuur.
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Wang, Xin. "Stochastic service network design." Thesis, Lancaster University, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732703.
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Preface This thesis has been prepared at Lancaster University Management School as part of a Ph.D. dgree. The work was carried out during the period from October 2010 to September 2014, with Professor Stein W. Wallace as supervisor as well as thesis adviser. Professor Teodor G. Crainic has also been involved, providing guidance and giving advice. Most of the work for this thesis was done at Lancaster University. Some of the work was carried out during academic visits at Norwegian School of Economics, Bergen, Norway and at the Interuniversity Research Center on Enterprise Networks, Logistics and Transportation (CIRRELT), Montreal, Canada. This thesis aims to answer this question: when dealing with a problem with uncertain future, what can we do with the associated deterministic solution? Though the research is based on scheduled service network design for freight transportation, the results and conclusions may provide insights into other problems facing stochasticity of some kind. The thesis consist of three papers.
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Amir, Mohammad. "Semantically-enriched and semi-Autonomous collaboration framework for the Web of Things. Design, implementation and evaluation of a multi-party collaboration framework with semantic annotation and representation of sensors in the Web of Things and a case study on disaster management." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14363.
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This thesis proposes a collaboration framework for the Web of Things based on the concepts of Service-oriented Architecture and integrated with semantic web technologies to offer new possibilities in terms of efficient asset management during operations requiring multi-actor collaboration. The motivation for the project comes from the rise in disasters where effective cross-organisation collaboration can increase the efficiency of critical information dissemination. Organisational boundaries of participants as well as their IT capability and trust issues hinders the deployment of a multi-party collaboration framework, thereby preventing timely dissemination of critical data. In order to tackle some of these issues, this thesis proposes a new collaboration framework consisting of a resource-based data model, resource-oriented access control mechanism and semantic technologies utilising the Semantic Sensor Network Ontology that can be used simultaneously by multiple actors without impacting each other’s networks and thus increase the efficiency of disaster management and relief operations. The generic design of the framework enables future extensions, thus enabling its exploitation across many application domains. The performance of the framework is evaluated in two areas: the capability of the access control mechanism to scale with increasing number of devices, and the capability of the semantic annotation process to increase in efficiency as more information is provided. The results demonstrate that the proposed framework is fit for purpose.
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Perjons, Erik. "Model-Driven Process Design : Aligning Value Networks, Enterprise Goals, Services and IT Systems." Doctoral thesis, Stockholms universitet, Institutionen för data- och systemvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-56640.
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The purpose of business-IT alignment is to optimise the relation between business and IT in order to maximise the business value of IT. Successful business-IT alignment can be enabled by business processes and e-processes functioning as adaptive mediators between business and IT systems. Business processes are the ways actors work in enterprises and collaborate in value networks, while e-processes support a flexible flow of information between IT systems and business processes. The overall goal of this thesis is to propose methods for business process and e-process design and evaluation for achieving alignment between enterprise goals and IT systems. The methods are based on model-driven approaches, using enterprise and software models. More precisely, the proposed methods can be used for designing models of business processes supporting the fulfilment of enterprise goals in the setting of a value network; for designing models of generic and reusable business processes that support the fulfilment of enterprise goals; for designing models of e-processes that support a flexible alignment of IT systems with business processes; and for evaluating the extent to which business processes are aligned with enterprise goals and IT systems. The result of the thesis can be used to support business and system designers with practical knowledge on how to align business and IT systems in order to create efficient, high-quality, flexible and innovative organisations. The research presented in this thesis has been carried out following the design science paradigm. This paradigm is characterised by the creation of new and innovative artefacts for solving general problems, and the evaluation of their benefits and drawbacks.
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Oliveira, Stefano Petrini. "Modelo matemático para o projeto de redes cicloviárias integradas ao sistema de transporte público por ônibus em áreas urbanas /." Guaratinguetá, 2020. http://hdl.handle.net/11449/192172.
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Orientador: Antônio Fernando Branco Costa<br>Resumo: O presente trabalho desenvolveu um modelo matemático que contribui para o projeto de redes cicloviárias conexas e integradas ao sistema de transporte público por ônibus em áreas urbanas, fazendo uso da Otimização Multiobjetivo (OM) por meio da Programação Linear Inteira Mista (MILP ou MIP). A investigação dos critérios de infraestrutura que influenciam a demanda cicloviária e que deveriam compor a modelagem matemática foi realizada por meio da Revisão da Literatura e cinco critérios identificados, referentes ao: Conforto, Segurança, Objetividade, Intermodalidade e Continuidade. Cada critério é composto por uma série de subcritérios, dezesseis no total, classificados como parâmetros de projeto de entrada e/ou de saída para o modelo matemático, segundo funções objetivos e restrições. Uma aplicação do modelo foi realizada em um caso real para cidade de grande porte, em São José dos Campos – SP, e obtidas soluções exatas com redes parcialmente conexas (abordagem 1) e redes totalmente conexas (abordagem 2), integradas aos pontos de parada de ônibus e as linhas de ônibus da região delimitada, por meio da linguagem de modelagem General Algebric Modeling System (GAMS) e o solver CPLEX. Os resultados obtidos foram aderentes a realidade da macrozona de tráfego na região estudada e contribuem para o planejamento urbano como validado pela Secretaria de Mobilidade Urbana de São José dos Campos. A análise de diversos cenários para o modelo matemático, ponderando os objetivos do modelo, pos... (Resumo completo, clicar acesso eletrônico abaixo)<br>Abstract: The present work created a mathematical model that contributes to design bikeway networks integrated to the public transport service by buses in urban areas, using the Network Multiobjective Optimization through Mixed by means of Mixed Integer Linear Programming (MILP or MIP). The investigation of the infrastructure criteria that influence cycling demand and that should set the mathematical modeling was carried out through the Literature Review and five criteria were identified, referring to: Comfort, Safety, Objectivity, Intermodality and Connectivity. Each criteria is composed of a subcriteria set, sixteen in total, which performed as input and/or output design parameters for the mathematical model, according to fitness functions and constraints. An application of the model was carried out in a real case in São Jose dos Campos city - Sao Paulo state, and exact solutions were obtained with partially connected networks (approach 1) and fully connected networks (approach 2), integrated to the stop points by bus and bus lines in the defined region, using the General Algebric Modeling System (GAMS) modeling language and the CPLEX solver. The results obtained were adherent to the reality of the traffic macrozone in the studied region and contribute to urban planning, as validated by the São José dos Campos Urban Mobility Secretariat. The analysis of several scenarios for the mathematical model, considering the model's objectives, made it possible to verify the behavior of the res... (Complete abstract click electronic access below)<br>Doutor
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Krishnan, Niranjan 1973. "Design of large scale transportation service networks with consolidation : models, algorithms and applications." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47567.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and, (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 1998.<br>Includes bibliographical references (leaves 94-103).<br>by Niranjan Krishnan.<br>S.M.
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ISHIDA, Ken, Fujio TORIUMI, and Kenichiro ISHII. "Proposal for a Growth Model of Social Network Service." IEEE, 2008. http://hdl.handle.net/2237/12108.
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Chiam, David Tou Wei. "A model for the growth of network service providers." Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/10580.
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Consider a set of points and an associated demand for traffic between each pair of points. In this thesis, we consider the perspective of a notional Network Service Provider (NSP) who has to decide on the connections to build and the demands to satisfy in order to maximize its profits. The NSP makes these decisions based on the demand for connectivity and the constraints on their resources needed to provide the connections. We perform numerical experiments to study the tensions faced by the NSP in its decisions to structure its service network. Through the results generated, we infer how demand, revenue and cost influence the decisions of the NSP.
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Kanie, Koichi, Hiroshi Hasegawa, and Ken-ichi Sato. "Quasi-Dynamic Network Design Considering Different Service Holding Times." IEEE, 2008. http://hdl.handle.net/2237/12077.
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Ouellette, Michel. "Intelligent network service control point, design, modeling and evaluation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0003/MQ32549.pdf.
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Tandiono, Wilson 1979. "Inventory planning and network design for service parts logistics." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84813.
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Armacost, Andrew P. (Andrew Paul). "Composite variable formulations for express shipment service network design." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/28229.
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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Includes bibliographical references (p. 181-187).<br>In this thesis, we consider large-scale network design problems, specifically the problem of designing the air network of an express shipment (i.e., overnight) delivery operation. We focus on simultaneously determining the route structure, the assignment of fleet types to routes, and the flow of packages on aircraft. Traditional formulations for network design involve modeling both flow decisions and design decisions explicitly. The bounds provided by their linear programming relaxations are often weak. Common solution strategies strengthen the bounds by adding cuts, but the shear size of the express shipment problem results in models that are intractable. To overcome this shortcoming, we introduce a new modeling approach that 1) removes the flow variables as explicit decisions and embeds them within the design variables and 2) combines the design variables into composite variables, which represent the selection of multiple aircraft routes that cover the demands for some subset of commodities. The resulting composite variable formulation provides tighter bounds and enables very good solutions to be found quickly. We apply this type of formulation to the express shipment operations of the United Parcel Service (UPS). Compared with existing plans, the model produces a solution that reduces the number of required aircraft by almost 11 percent and total annual cost by almost 25 percent. This translates to potential annual savings in the hundreds of millions of dollars. We establish the composite variable formulation to be at least as strong as the traditional network design formulation, even when the latter is strengthened by Chvital-Gomory rounding, and we demonstrate cases when strength is strictly improved. We also place the composite variable formulation in a more general setting by presenting it as a Dantzig-Wolfe decomposition of the traditional (intractable) network design formulation and by comparing composite variables to Chvital-Gomory cuts in the dual of a related formulation. Finally, we present a composite variable formulation for the Pure Fixed Charge Transportation Problem to highlight the potential application of this approach to general network design and fixed-charge problems.<br>by Andrew P. Armacost.<br>Ph.D.
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Mogensen, Matthew D. (Matthew David). "Service network design optimization for Army Aviation lift planning." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90066.
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Thesis: S.M. in Transportation, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 145-146).<br>The need for optimized aviation lift planning is becoming increasingly important as the United States and her allies participate in the Global War on Terror (GWOT). As part of a comprehensive effort, our nation's fighting forces find themselves conducting operations around the globe, with this trend likely to increase, even as budget constraints limit the number of personnel and amount of equipment that is deployed. While much attention has been given to airline schedule optimization and fleet planning. the challenge of Army Aviation lift planning is unique in that it must be able to adapt to changing requirements and missions on a daily basis. In this thesis, we model Army Aviation lift planning as a service network design problem, and propose two heuristic algorithms, which compare favorably to current human planning systems. Furthermore, we apply these heuristic algorithms to long term asset planning and capacity requirement estimation for future military scenarios, and analyze how passenger flexibility affects the need for capacity.<br>by Matthew D. Mogensen.<br>S.M. in Transportation
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Jesus, Wanderson Paim de. "Network programming as a service : an innovation friendly business model." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/88885.
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As redes de computadores têm evoluído para acomodar uma grande variedade de serviços, tais como streaming de vídeos de alta qualidade e entrega de conteúdo sensível a atrasos. Estes serviços têm aumentado a demanda por recursos não originalmente considerados na Internet. Com a promessa de atender novas demandas de rede rapidamente, pesquisadores propuseram Redes Programáveis, nas quais o comportamento dos dispositivos de rede pode ser alterado utilizando aplicativos. Entretanto, tal comportamento pode não ser um consenso entre usuários da rede. O surgimento de Redes Virtualizadas superou tal questão, ao permitir a coexistência de múltiplas redes virtuais sobre a mesma infraestrutura física. A fim de se obter redes virtuais isoladas com comportamento programável, foram propostas as Redes Virtuais Programáveis (RVP). Diante dessa nova realidade, os administradores de rede não estão mais olhando unicamente para dispositivos de rede. Eles estão olhando para um sistema composto de dispositivos e aplicativos de rede que definem o comportamento individual de cada rede virtual. Isso requer não apenas novas ferramentas e abordagens de gerenciamento, além disso, exige a revisão de conceitos tradicionais sobre redes. Implementações de RVP são encontradas principalmente em testbeds e ambientes de Computação em Nuvem. Testbeds são muito propícios à inovação, mas possuem fortes limitações no que diz respeito a migração de soluções experimentais para produção. Por outro lado, computação em nuvem é um ótimo ambiente de produção, mas possui restrições de flexibilidade e inovação, uma vez que as soluções de rede adotadas geralmente são proprietárias. Portanto, nesta dissertação introduz-se um novo modelo de negócio que permite a criação de soluções inovadoras em ambientes de produção, a Programabilidade de Redes como um Serviço (NPaaS). Diferente do modelo de negócio de redes tradicionais, onde os usuários finais são apenas consumidores dos serviços de rede já disponíveis, em NPaaS os usuários finais também são capazes de desenvolver e implantar novas soluções de rede. Para apoiar NPaaS, propõe-se uma plataforma de gerenciamento de rede virtual programável, chamada ProViNet. Essa plataforma fornece a arquitetura de software e estratégias necessárias para permitir a implantação e gestão NPaaS. Uma avaliação qualitativa do modelo de negócio NPaaS foi realizada, o resultado foi contrastado com alguns dos modelos de negócio praticados atualmente. Assim, enfatizando a singularidade do NPaaS. Enquanto isso, uma avaliação experimental foi realizada para demonstrar a viabilidade da plataforma ProViNet. Os resultados mostraram que NPaaS representa uma alternativa promissora para ambientes de rede virtual com acesso público, como as nuvens públicas. Além disso, uma avaliação quantitativa do protótipo da plataforma demonstrou a viabilidade técnica e provou que aplicativos de rede desenvolvidos usando BPMN são capazes de executar com desempenho aceitáveis.<br>Computer networks have evolved to accommodate a wide variety of services, such as streaming of high quality videos and delay-sensitive content delivery. These services have increased the demand for features not originally considered in the Internet. Aiming to address novel network demands quickly, some researchers proposed Programmable Networks, in which network devices behavior can be changed using applications. Notwithstanding, such behavior might not be a consensus between computer network stakeholders. The emergence of Virtualized Networks overcame this issue by allowing the coexistence of multiple virtual networks on the same physical infrastructure. Finally, the convergence of programmability and virtualization techniques are explored within a third concept, the Programmable Virtual Networks (PVN). Faced with this new reality, network administrators are no longer just looking at network devices. They are looking at a system made of virtual devices and applications that define each virtual network behavior. This requires not just new tools and management approaches, over and above that, requires new thinking. PVN deployments are found mostly in shared experimental facilities (also known as testbeds) and Cloud Computing environments. Testbeds are very innovation friendly, but with strong limitations in regards to taking experimental solutions to production. On the other hand, Cloud computing is a great production environment, but presents flexibility and innovation restrictions once network solutions adopted are usually proprietary. Therefore, in this dissertation it is introduced Network Programming as a Service (NPaaS), a new business model that aims to facilitate the conduct of innovative solutions for production environments. Different from traditional network business models, where end-users are just consumers of network services already available, in NPaaS, end-users are also able to develop and deploy novel network solutions. To support NPaaS, Programmable Virtual Network management platform is proposed. Such platform, named ProViNet, provides all architectural and technical features necessary to enable NPaaS deployment and management. A qualitative evaluation of the NPaaS business model was performed, and the result was contrasted with some of the current models, thus, emphasizing the singularity of NPaaS. In the meanwhile, an experimental evaluation was conducted to demonstrate the feasibility of ProViNet platform. Results have shown that NPaaS represent a promising alternative for virtual network environments with public access such as public clouds. Moreover, a quantitative evaluation of the platform prototype demonstrated the technical feasibility and proved that network applications developed using BPMN are able to run with acceptable performance rates.
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Chen, J. "Model-Based Wireless Network Control using Co-Design." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527670.
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Chiang, Nhan Tu. "Mesh network model for urban area." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44698.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2008.<br>Includes bibliographical references (p. 52, 2-7 (2nd group)).<br>Decreasing population, high crime rate, and limited economic opportunities are all symptoms of urban decline. These characteristics are, unfortunately, evident in major cities and small towns. Local municipalities in these cities and towns with the aid of state and federal government have attempted to reverse urban decline through the traditional approach of urban renewal. Their idea was to create low cost housing to attract people back to urban areas. Their approach has shown mixed results with most attempts having no effect on the deterioration. The goal of this thesis is to propose a higher system approach to answer urban decline through the application of new technology, wireless mesh networks. A wireless mesh network can provide improved security, public safety, new economic opportunities, and a bridge that crosses the digital divide. Married to the appropriate applications, a wireless mesh network creates a business model that is both favorable and sustainable. More importantly, the business model brings about the human capital necessary for urban revitalization.<br>by Nhan Tu Chiang.<br>S.M.
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Kanie, K., H. Hasegawa, and K. Sato. "Quasi-Dynamic Network Design Considering Different Service Holding/Contract Terms." IEEE, 2007. http://hdl.handle.net/2237/12046.
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Wang, Zhiwei. "Transit network design considering urban development and differential service types /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202008%20WANG.
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Zhou, Tianli Ph D. Massachusetts Institute of Technology. "Network design for integrated vehicle-sharing and public transportation service." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99570.
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Thesis: S.M. in Transportation, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 81-83).<br>Vehicle sharing services have become a major urban transportation mode. One-way vehicle sharing service facilitates access to public transportation systems, thereby addressing the first and last mile challenges and creating an integrated vehicle-sharing and public transportation network providing origin-to-destination service. In this thesis we provide models and methods for design one-way vehicle-sharing networks. The location of one-way vehicle sharing stations strongly influence the level of travel time savings achieved by the users of the system. Our goal, then, is to select station locations so as to maximize the connectivity with the public transportation system, increase the accessibility to the urban area, reduce travel times, reduce congestion, and reduce emissions. We select a certain number of stations to install from a set of candidates whose locations are predetermined. In Chapter 2, we review existing literature in which the objective is to minimize total user travel cost. In Chapter 3, we propose a new model with the objective to design a network such that more users experience travel time savings that are sufficiently large to elicit mode shifts to the integrated public transportation option. We develop a decomposition procedure to solve our model and propose cut generation methods to expedite the solution process. Computational results in Chapter 4 show that our algorithm reduces solution times, while increasing the number of travelers who can experience travel time savings of significance by using our newly designed network. In Chapter 5, we propose a heuristic method to generate a network design with (near-) minimal total travel cost. Our decomposition method that searches in a neighborhood around the known best design, and changes the neighborhood center when improved solution are identified or expands the neighborhood if no better solution is found. Computational results show that our algorithm finds improved solutions, compared to existing approaches, for large-scale networks with imposed limits on computation time. In Chapter 6, we conclude the thesis and provide future research guidance.<br>by Tianli Zhou.<br>S.M. in Transportation
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Sayadian, Edward V. "Video transfer application transport protocol design over ATM networks." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-03172010-020223/.
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Maheshwari, Nimish. "A network design model for multi-zone truckload shipments." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/3228.
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Truckload shipments constitute a significant portion of the freight transportation industry. In recent years, truckload industry is facing a serious problem of high driver turn over rate. In this research, we present a mathematical model for multi-zone dispatching method to solve this issue. Multi-zone dispatching is a method in which a service area is divided into many zones. Truckload within a zone is carried by local drivers and the truckload between zones is carried by lane drivers. Apart from reducing the driver tour length to a desirable level, the model for multi-zone also contains some unique constraints to address some issues from the perspectives of the company and the customer. The binary integer program is solved by exact methods. As the problem size increases, exact methods fail quickly. Hence, a construction heuristic within tabu search framework is developed to solve the model. Analysis of various parameters concerned is provided to gain better insights of varied aspects of the problem. Computational results for analysis of parameters and comparison of exact and heuristic methods are provided.
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Li, Xiaojing S. M. Massachusetts Institute of Technology. "Network design and fleet allocation model for vessel operation." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35686.
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Thesis (S.M. in Ocean Systems Management)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2006.<br>Includes bibliographical references (leaves 104-105).<br>Containership operators in the U.S. are confronted with a number of problems in the way they make critical fleet allocation decisions to meet the increase of shippers' demands. Instead of the empirical approach, this research describes an optimization method for the fleet allocation problem This methodology is applied by generating hypothetical values for a hypothetical firm. The endeavor of this method is to facilitate ship operations by allocating available fleet to maximize capacity and covering all the demands with the lowest cost The problem solving process is subdivided into three sub-models: the string simulation sub-model, the network design sub-model, and the fleet and cargo assignment sub-model. Each sub-model is explored by the combined approach of analysis and simulation, formulated as a Mixed Integer linear programming problem, implemented using the Optimization Programming language, and solved by CPLEX. This model provides several feasible fleet allocation proposals ranked by their profits, as well as yields the output of the detail cargo assignment at each port, the revenue, cost, and profit breakdown for each proposal.<br>(cont.) Subsequently, various scenarios can be studied in great detail by developing a User Interface in Java programming language based on a determined proposal. This interface allows the carrier to evaluate hundreds or thousands of fleet allocation scenarios and to quickly focus on key characteristics and options that are most relevant. This program extends the deterministic optimization method into a model supporting the solution to stochastic problems.<br>by Xiaojing Li.<br>S.M.in Transportation<br>S.M.in Ocean Systems Management
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Hodgdon, Tammy Jo. "A Combined Inventory-Location Model for Distribution Network Design." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/35892.
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Two important areas of decision-making in distribution system design involve facility loca-
tion and inventory policy determination. Facility location analyzes questions such as how
many facilities should be opened, where they should be located, and which customers should
be assigned to which DCs. Inventory policy determination involves more tactical decisions
such as the order quantities and frequencies at each level or echelon in the network. It is
believed that these two decisions can influence each other significantly. Including a multi-
echelon inventory policy decision in a location analysis allows a user to capitalize on the
strengths that each DC has to offer (e.g., lower labor rates, land costs, etc.). Likewise, when
the locations of two facilities are known, a multi-echelon inventory policy can be designed
better to incorporate the exact lead times and fixed costs between the facilities at each
level of the system. Despite this, the two problems are typically solved independently. This
research addresses these problems together and investigates different heuristic methods for
solving a combined inventory-location model. We begin by presenting the background and
formulation for each problem. These formulations are then combined to show how the two
problems can be mathematically formulated together. Rather than solve the problem ex-
actly, two heuristic methods using different philosophies are tested. We apply these heuristic
methods to the combined inventory-location problem to determine how much we can im-
prove distribution network design solutions and what type of heuristic methodology is most
effective in gaining these improvements. Our results show that the combined inventory-
location model is capable of improving on the solutions obtained by a location model with
a fixed inventory policy. The improvement based on the data sets tested in this research
was approximately $60,000. However, in cases where the inventory costs are a larger portion
of the total cost, the improvement made by the inventory-location model increased to over
$1,000,000. We also found that our second heuristic method tested provided statistically
significant improved results over our first heuristic method. Moreover, the second heuristic
method typically ran 67% faster. The improved results, although small in a relative sense
(the average improvement was 0.18%), would still represent a large absolute improvement in
supply chain costs. As much as $174,000 was saved in the data sets tested for this research.<br>Master of Science
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Sundar, Gayathri. "Design of a service-oriented dashboard." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2007m/sundar.pdf.
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Thesis (M.S.)--University of Alabama at Birmingham, 2007.<br>Additional advisors: David G. Green, Gary J. Grimes, John L. Hartman IV. Description based on contents viewed Feb. 5, 2008; title from title screen. Includes bibliographical references (p. 110-120).
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Norton, David K. "Joint mobile network operations routing design and quality of service configuration." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Sep%5FNorton.pdf.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, September 2007.<br>Thesis Advisor(s): Xie, Geoffrey. "September 2007." Description based on title screen as viewed on October 25, 2007. Includes bibliographical references (p. 127-129). Also available in print.
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Liang, Liang. "The impact of innovation networks on service design." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/28036.
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Innovation networks are not only about connections, but also dynamics, structures and influences. This research focuses on these three new aspects of innovation networks. The results of this research show that innovation networks have regularities in their dynamics, structures and influences. In the conclusion, these regularities are presented in the network snapshots and regression modelling. This research makes contributions in improving the understanding about how service innovation is created.
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Miller, W. "The design and application of power line carrier communication and remote meter reading for use in integrated services and broadband-integrated services digital networks." Thesis, Open University, 1997. http://oro.open.ac.uk/57707/.
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Abdullah, Shahrum Shah. "Experiment design for deterministic model reduction and neural network training." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406584.
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Zhan, Song. "A development gene regulation network model for Electronic Circuit design." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516396.
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Grindy, Scott C. (Scott Charles). "Complex mechanical design of bio-inspired model transient network hydrogels." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111249.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 179-191).<br>The mechanical properties of viscoelastic soft materials are strongly time-dependent, such that we must describe their mechanical properties with material functions. This is an inherently difficult problem for materials scientists: typically,we define structure-property relationships in terms of scalar material properties, such that modifying a material's structure affects a target material property. However, if the property of interest is function-valued, modifying the material's structure may affect different parts of the material function in undesirable ways. The increased dimensionality of the target material property therefore renders the overall materials design problem for soft materials significantly more difficult. Recently, transient interactions have been shown to vastly improve the mechanical properties of soft materials by providing increased energy dissipation through the dissociation of the reversible bonds. However, there is a wide variety of transient interactions to choose from, varying widely in binding strength, kinetics, specificity, and stoichiometry of the groups that form the association. More research needs to be done to identify what physical laws apply universally across the types of transient associations, and what differentiates the abilities of different types of interactions to control material mechanics. In this thesis,we show how transient metal-coordinate bonds inspired by the chemistry of the mussel byssal threads can be used to engineer viscoelastic material functions in an intuitive and facile manner. We show that intelligent understanding of the thermodynamics and kinetics of metal-coordinate complexes allows quasi-independent control over different regimes of the viscoelastic material function. We draw from classical polymer physics and metal-coordinate chemistry to show that our 4-arm polyethylene glycol-based hydrogels crosslinked with transient histidine:metal bonds represent a uniquely ideal system for probing fundamental questions in how the properties of transient interactions affect viscoelastic material functions. In the final part of this thesis, we extend our control over the viscoelastic material functions of hydrogels by exploiting the redox-sensitivity of histidine:metal crosslinks. In this way, we show how histidine:metal interactions are perhaps more versatile than other types of transient interactions, promising a facile way to examine structure-property relationships in transient networks.<br>by Scott C. Grindy.<br>Ph. D.
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Shen, Guoqiang. "Hub location and network design : model formulations and numerical analyses /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949508369231.
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Scanlan, James Patrick. "A network model for the management of complex design projects." Thesis, University of the West of England, Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300917.
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A review of techniques that support Concurrent Engineering or Simultaneous Engineering (CE/SE) is presented. It is shown that the management of projects consistent with the principles of CE/SE is hampered by the lack of a suitable activity network modelling tool. The limitations of existing methods such as the Critical Path Analysis Method (CPM) and the related Program Evaluation and Review Technique (PERT) for the management of complex design projects are demonstrated. Recent enhancements and alternatives to CPMlPERT are reviewed. A network model is proposed that supports CE/SE and is capable of representing uncertain task outcomes, partial dependencies and task iterations characteristic of complex design projects. Discrete-event simulation is used to evaluate the network and show the effect of resources constraints, communications efficiency and activity control logic on project completion timescales and product quality. The proposed model is designed so that the activity network can be derived from and directly related to a Quality Function Deployment (QFD) matrix. This allows project completion to be expressed in terms of customer requirements and priorities. The network model is illustrated by showing how it can be applied to an aerospace design project.
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Chuang, Wei Kuo. "Computational model for engineering design and development." Thesis, Brunel University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263496.
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Retamales, Felipe. "Capacity Planning And Server Design For A Web Service." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-31842.
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Devo IT and its subsidiary SoftRobot AB are planning to offer a new service to its clients to further enhance growth of the company. This new service is a website that allows clients to upload documents that are converted into machine-editable text. The website and its underlying database are developed by SoftRobot's developer, but they lack the hardware. Using Cisco's PPDIOO network life cycle model, the three first stages of the project are identified. The "prepare" stage is already done by Devo IT where the project's justifications are discussed. In the subsequent "planning" stage, the needs of the project, are identified and a gap analysis is made of what is needed. The "design" phase elaborates which specific hardware and software is needed for the project. Three servers are needed, one for the main web server, a second for the database, and a third as a cache server for relieving the load on the database. These are planned as virtual machines, so that they can be located on the same physical machine and easily moved if necessary. The disk space required for the database is calculated with test documents since the average document size, the number of clients and how much they upload is known. Disks with adequate size can therefore be chosen. Different ways of improving performance and lowering failure rate of the disks are discussed with the means of RAID levels. These levels improve both disks reliability and performance in different ways.RAID 10 is designated for the database and RAID 1 for the web server and the caching server since those levels are the most suited for these applications. CPU and memory requirements are chosen based on availability and cost. Network bandwidth is analyzed and confirmed as sufficient with the help of the test database and since the bottleneck would be the CPU converting the uploaded documents. Software for backup and administration of the virtual machines are chosen comparing their functionality and the requirements for the project and their cost. After the hardware needs are identified, an cost analysis is made between hosting in Devo IT's server room or outsourcing it to an external company. It was revealed, as Devo IT suspected, that outsourcing costs more. The results of this thesis enables Devo IT to create a service with good quality, which will meet the clients expectations and also make Devo IT grow as a company with new clients and increased revenue.
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Srinivasan, Sridhar. "Design and Use of Managed Overlay Networks." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14501.
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As the role of the Internet has been steadily gaining in importance,
overlays are increasingly being used to provide new services and to
deploy older ones. Some of the services for which overlays have been
proposed include multicast, quality of service (QoS), search, and
resilient networks. The use of overlays, in turn, has led to more
interest in improving their performance. The performance of an overlay
network depends significantly on how the network is structured, i.e.,
the placement of the nodes in the underlying network topology, the
links between the overlay nodes and the access links of these nodes.
This thesis focuses on algorithms for improving the performance of
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Nguyen, Hoang Nghia. "Survivable mesh-network design & optimization to support multiple QoP service classes /." Connect to thesis (via ADT), 2009. http://adt.ecu.edu.au/adt-public/adt-ECU2010.0003.html.
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Stieber, Marcel Colman Eric. "Radio Direction Finding Network Receiver Design for Low-cost Public Service Applications." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/889.
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A low-cost radio direction finding (RDF) VHF receiver has been investigated for development into a radio direction finding network (RDFN) with a particular focus towards public service and commercial asset tracking applications. The primary design criteria were reproducibility, low-cost, and simplicity such that public service and volunteer organizations can benefit from the technology. Two receiver designs were built and tested to allow for comparison of practicality, cost, and accuracy. A pseudo-Doppler RDF and a time difference of arrival (TDOA) receiver were built as proof-of-concept for a system design based on commercial off-the-shelf (COTS) components. The pseudo-Doppler system is a less practical implementation due to the necessity for custom hardware, a large antenna system, and an increased directional error due to multipath and weak signals. The TDOA system has potential as a very simple and low-cost RDFN implementation, but requires extremely accurate time synchronization that is difficult to achieve using COTS GPS receiver modules. The final proposed solution takes advantage of the simple TDOA hardware and multiple detection techniques (including signal strength) to produce improved locational data and ultimately provide a more accurate estimate of position. Further development and improvements to this receiver design have the potential for implementation as a low-cost radio direction finding network.
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Chuang, Wei-Po, and 莊偉柏. "The Design of Mobile Network-Based Guide System and Personalized Service Model." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/99391629770294166009.
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碩士<br>大同大學<br>資訊工程研究所<br>91<br>With the advent of information technology, the products that integrate the wireless communication and handheld device become more and more popular. Due to the computing power and compactness in size for carry, handheld device becomes popular for users to process personal related work, to read the e-book or to execute some programs. In traditional tour guide systems, users always hear the narrator or use the guide system to tour unilaterally and they could not explore the contents based on their own interests. Thus, the traditional guide system lacks the interaction between users and show rooms.
So we propose an application for guide system of museum. The guide system consists of a Tablet PC with IEEE 802.11 wireless networking capabilities and combines methodology of intelligent searching model. Our purpose is to design a guide system to be suitable for use and to provide a good learning environment for general users. Our guide system combines the positioning technique and location-awareness to provide the surrounding information for users. The guide system not only accepts the user’s search query to find the target but also receives the information from users that they noted during the tour guide. Users can download the related notes to reference which were recorded by other users. Under such a design concept the contents of our guide system will keep on improving such that an interactive learning environment will be gradually established. In addition, the system will record the process of tour guide from users. We also design a data mining model to provide personalized service of tour guide. The system displays the process of tour guide and discusses the functions of users interface. The experimental result show that our system is suitable to tour guide for particular domain. Finally, the designed system is particularly suitable to outdoor teaching for students and can be easily extended to scenic introduction for some places or other museums.
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"Public transport network design for competitive service providers." 2009. http://library.cuhk.edu.hk/record=b5893904.
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Chan, Yon Sim Eddie.<br>Thesis submitted in: November 2008.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2009.<br>Includes bibliographical references (leaves 89-92).<br>Abstracts in English and Chinese.<br>Abstract --- p.i<br>Acknowledgement --- p.iii<br>Chapter 1 --- Introduction --- p.1<br>Chapter 1.1 --- Motivation --- p.1<br>Chapter 1.2 --- Background --- p.2<br>Chapter 1.3 --- Literature Review --- p.5<br>Chapter 2 --- Game Theoretic Models For Competing Operators --- p.10<br>Chapter 2.1 --- Competitive Equilibrium Model --- p.12<br>Chapter 2.1.1 --- Base Model Formulation --- p.12<br>Chapter 2.1.2 --- Capacitated Model Formulation --- p.16<br>Chapter 2.1.3 --- Solution Methods --- p.19<br>Chapter 2.2 --- Net Profit Maximizing --- p.26<br>Chapter 2.2.1 --- Equitable Route Assignment --- p.27<br>Chapter 2.3 --- Congestion Game Model with Player- and Route-dependent Operating Cost --- p.31<br>Chapter 2.3.1 --- Best-Response Algorithm --- p.34<br>Chapter 2.3.2 --- Integer Programming Formulation --- p.41<br>Chapter 2.3.3 --- Net Profit Maximizing --- p.43<br>Chapter 3 --- Network Design --- p.45<br>Chapter 3.1 --- Network Structure --- p.47<br>Chapter 3.2 --- Comparison Between Two Network Structures --- p.49<br>Chapter 3.2.1 --- Routes with Same Ridership --- p.49<br>Chapter 3.2.2 --- Routes with Different Ridership --- p.65<br>Chapter 3.2.3 --- Network with Player- and Route-specific Profit Function --- p.69<br>Chapter 4 --- Elastic Demand --- p.71<br>Chapter 4.1 --- Congestion Game Model with Service-Quality-Based Elastic Demand --- p.71<br>Chapter 4.1.1 --- Network with Service-Quality-Based Elastic Demand --- p.82<br>Chapter 5 --- Conclusion --- p.84<br>Chapter 5.1 --- Future Work --- p.84<br>Chapter 5.1.1 --- Impact of Network Design and structure --- p.84<br>Chapter 5.1.2 --- Non-cooperative and Cooperative Games --- p.86<br>Chapter 5.1.3 --- Joint game-theoretic model of both passenger and providers --- p.87<br>Bibliography --- p.89
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Jeet, Vishv. "Logistics network design with inventory stocking, time-based service and part commonality." Thesis, 2006. http://hdl.handle.net/2152/3400.
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Liao, Rongying, and 廖容瑩. "Design and application of layout planning model for bikeway networks and service stations in a recreation area." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93436737322052477479.
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碩士<br>國立臺北大學<br>都市計劃研究所<br>99<br>Facing the issues of climate change, global warming and energy consumption, it awakens human beings to revise and examine their lives once again. The consciousness of environmental protection and sustainability has then been raised and gradually involved in daily lives. In order to moving toward a sustainable future, the vogue of lifestyles of health and sustainability associated with the promotion of Taiwanese film, Island Etude in 2007, leads to the craze of bicycle grand tour island wide. A bicycle does no longer simply play the role as one of transportation modes, but it becomes a kind of green recreation equipment. Bicycling recreation in Taiwan has easily associated with the concepts of LOHAS and eco-friendly living styles due to the propagandas and promotions from the media. Since then bike riding has been promoted as one of good and brand new options for pastimes. Along with the rapid growth of biking in Taiwan and planning to boast the trend for biking, the government has aggressively developed and built island-wide bikeway networks. However, the current bikeway network planning practices are considered not well-organized, unable to satisfy the demand of active planning, lack of systematical and practical planning tools and dependent on planners’ professional experiences or instincts.
For these reasons, the purpose of this study is to develop a layout planning model for bikeway networks and service stations in a recreation area by using of mathematical programming approach. First of all, through the literature review, the study summarized the important elements for planning bikeway networks and defined the decision-making problem of bikeway network design. Furthermore, based on reviewing the literature, the study formed a framework to plan bikeway networks in a recreation area. Next, the research proceeded to interview different stakeholders to clarify the decision-making contents and questions, and developed the model by mathematical programming approach. The model is designed as a multi-objective 0-1 programming problem, and the ε-constraint method was applied to solve the problem to search non-dominated solutions as alternatives. Finally, the developed model was applied on the Sanzhi area in ‘North Coast & Guanyinshan National Scenic Area’. The case study collected realistic data for model parameter values and created concrete network alternatives for verifying the applicability and rationality of the developed model.
The case study resulted in four alternatives, which performed significant trade-off relationships among objective values except for the first objective. In addition, the model planning results are superior to the existing bikeways. Through scenario analyses, simultaneously adjusting the measurement of the safety parameter and the construction budget indeed changed the network and service station layouts and objective values of alternatives . This research provides bikeway planning aids in recreation areas to planners. The process of case study can be applied as a reference for model applications in other recreation areas. The planning results of case study offer concrete recommendations to the administration of ‘North Coast & Guanyinshan National Scenic Area’ for further upgrading the existing bikeways.
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Morganti, Gianluca. "Tactical block planning for intermodal rail transportation." Thesis, 2020. http://hdl.handle.net/1866/24328.
Full textAbstract:
Le mémoire présente le problème de la planification tactique des “blocks” pour le transport ferroviaire intermodal, qui a été peu étudié jusqu’à présent. Nous proposons un nouveau modèle de design de réseau en tenant compte de la spécificité du transport intermodal. La recherche se concentre sur le contexte nord-américain et fait suite à une étroite collaboration
avec l’une des principales compagnies ferroviaires nord-américaines.
Le “blocking” constitue une importante opération de transport ferroviaire de marchandises, par laquelle des wagons d’origines et de destinations potentiellement différentes sont regroupés pour être d´eplacés et manipulés comme une seule unité, ce qui permet des économies d’échelle. La littérature se limite aux travaux traitant le problème classique du blocage des trains, où la demande est exprimée en termes de wagons. A notre connaissance, aucun travail préalable n’a été consacrè à un contexte de transport intermodal, où la demande est exprimée en termes de conteneurs à dèplacer d’un terminal d’origine donné vers un terminal de destination donné, introduisant ainsi un processus de consolidation supplémentaire.
Nous proposons un modèle de “blocking” qui prend en compte plusieurs types de conteneurs et wagons, intégrant l’affectation conteneur-wagon. Nous présentons un nouveau modèle de design de réseau à trois couches en temps continu formulé sous la forme d’un programme linéaire mixte en nombres entiers (MILP), dans le but de minimiser le coût total de transport composé par la sélection de blocs, les coûts d’exploitation et la gestion du coût de la demande. Le modèle peut être résolu en utilisant un solveur commercial pour des tailles réalistes. Nous illustrons les performances et l’intérêt de la méthode proposée à travers une étude de cas approfondie d’un important chemin de fer nord-américain.<br>The thesis presents the tactical block-planning problem for intermodal railroads, which has been little studied so far. We propose a new block service network design model considering the specificity of intermodal rail. The research focuses on the North American context and follows a close collaboration with one of the major North American railroad companies.
Blocking constitutes an important rail freight transport operation, by which cars with potentially different origins and destinations are grouped to be moved and handled as a single unit, yielding economies of scale. The literature is limited to works addressing the classical train blocking problem, where demand is given in terms of cars to be blocked among
specific OD pairs. To the best of our knowledge, no prior work has been dedicated to an intermodal transportation context, where demand is expressed in terms of containers to be moved from a given origin terminal to a given destination terminal, hence introducing an additional consolidation process.
We propose a blocking model that considers several types of containers and railcars, integrating the container-to-car assignment. We present a new continuous-time, three-layer service network design model formulated as a Mixed Integer Linear Program (MILP), with the objective of minimizing the total transportation cost composed by block selection, operation costs, and handling demand cost. The model can be solved using commercial solver for realistic sizes. We illustrate the performance and interest of the proposed method through an extensive case study of a major North American railroad.
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Hsiao, Yeong-Shiou, and 蕭永修. "THE BUSINESS MODEL AND STRATEGY OF EPCGLOBAL NETWORK SERVICE INDUSTRYTHE BUSINESS MODEL AND STRATEGY OF EPCGLOBAL NETWORK SERVICE INDUSTRYThe Business Model and Strategy of EPCglobal Network Service Industry." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/43760979278646530773.
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碩士<br>國立臺北大學<br>企業管理學系碩士在職專班<br>93<br>The EPCGlobal Network Service is a newly developed industry facilitating information exchange on the Internet. It provides a variety of services, including ‘real-time’ tracking for products, and is part of the total eBusiness solution. In this research, we use the Internet’s business models as a starting point, and then explore possible alternative strategies on behalf of the EPCglobal Network Service industry. Following research methodology, we used the document analysis method to collect material and extract relevant information. This resulted in a range of modified business strategies. We also used the expert interview method to evaluate the usefulness of our findings. In our research, we found there are two types of vendors that can provide the EPCglobal Network Service: 1., the existing eBusiness vendor (for example, IBM, HP, Oracle and Microsoft), and, 2., the new systems or software vendors; companies that are computer related but new to eBusiness. Existing vendors that have complimentary assets, can play one or more of the following roles: content aggregator, Internet service provider, or software supplier. They can use a ‘development by itself’ strategy, keeping the profit within their company alone, or they can use ‘team-up’ strategies to share the profit with partners, but reduce the risk. New vendors, those with only technical capabilities, can also play one or more of the above roles. However, they are limited to only using ‘team-up’ strategies, in cooperation with existing vendors.
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Chang, Meng-Chi, and 張孟琪. "Strategic Service Network Design for Liner Carriers." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/09049581816048188130.
Full textAbstract:
碩士<br>國立臺灣海洋大學<br>運輸科學系<br>100<br>With the trend of the ship maximization of the international freight, all of carriers start building large containers in order to reduce the operation cost and meet the marketing need. Furthermore, because of the ship maximization making a reduction of berthing on the main route, while planning the shipping route, carriers hope that they can load goods to smaller containers in the middle port and transport to the final destination. This study is considered the operation revenue of shipping route which can meet the minimization of cost, and the count of middle port. In the point of marketing need, the volume of goods and the need of berthing also should be considered.
The purpose of this study is to formulate and analyze a strategic service network design model for liner carriers. The key decisions are: the number and locations of hub ports, the first level routing between opened hub ports, and the second-level routing between opened hub ports and candidate ports not included in the first-level routing. The problem is formulated as a mixed integer program and solved by LINGO 12.0. A small example is created to illustrate the proposed model. Sensitivity analysis is also performed to gain better insights into knowing how several important parameters affect the service network design.
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Khayltash, Golara. "Design of a Network Independent Emergency Service." Thesis, 2007. http://hdl.handle.net/10539/2151.
Full textAbstract:
Student Number : 9301997W -
MSc thesis -
School of Electrical and Information Engineering -
Faculty of Engineering and the Built Environment<br>Emergency services are vital for the minimization of damage, injury and loss of life.
These services are, by definition, a combination of telecommunications and information
services, and are by nature, distributed. However, most current emergency
services do not take advantage of emerging technology, and hence, are restricted in
the functionality they offer.
This project proposes the design a full information structure for an emergency call
centre service, which can be offered as a service or application on any core network.
As emergency services are distributed, and combine both telecommunications and
information services, an appropriate design tool which caters for these issues, is the
Reference Model for Open Distributed Processing (RM-ODP), which will be used in
the design of the emergency service. In addition, OSA/Parlay Application Programming
Interfaces (APIs) will be used for the application to access telecommunication
network functionality.
The enterprise viewpoint examines the design requirements and considerations for
an emergency system, which is the first step in designing a service based on the RMODP
guidelines. Secondly, the information viewpoint is defined, which identifies the
information flows between the objects and classes defined in the enterprise viewpoint
with the aid of robustness diagrams and high level message sequence charts. Next,
the computational viewpoint of the emergency service describes the components
that the service consists of and the interfaces through which they communicate,
enabling distribution of the system to be visualized. In addition, the engineering
and technology viewpoints are briefly touched upon.
The RM-ODP proves to be a useful tool the design of this application. In addition,
the use of OSA/Parlay APIs have also proved beneficial, enabling the application
to run on any platform, irrespective of the level of functionality it already provides.
The benefits that this design offers over conventional emergency services are allowing
callers and emergency response personnel full access to the functionality of the service, despite any limitations on their telecommunications network, finding the location
of a caller from a fixed or mobile phone, ease and speed of obtaining relevant
emergency information, and the ease and speed of sending relevant information to
emergency response personnel.
Finally we recommend improvements in the reliability and accuracy of finding the
location of mobile phones, as well as creating ways of identifying the location of
VoIP users.