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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Daugiakriterinė statybos projekto valdymo analizė / Multiple Criteria Analysis Of Construction Project Management

Schieg, Martin Wolfgang 22 December 2010 (has links)
Disertacijoje nagrinėjamos statybos projekto valdymas, jame dalyvaujan-čios ir savo tikslus siekiančios įgyvendinti suinteresuotos grupės bei valdymą veikianti išorinė makro- ir mikroaplinka. Norint sukurti ir pasiekti efektyvų statybos projektų valdymą, reikia atlikti kompleksinę jo etapų analizę. Be to, reikia atsižvelgti į projekto, organizacinės ir išorinės aplinkos veiksnių poveikį. Nagrinėjamas statybos projektų valdymo efektyvumo didinimas, panaudojant daugia¬kriterinės analizės sprendimų paramos metodus ir informacines techno-logijas. Darbo tikslas – įvertinti ir pagerinti statybos projektų valdymo efektyvu-mą, naudojant sukurtą Integruoto projektų valdymo modelį. Naudojant šį mo-delį buvo sukurta Daugiakriterinė statybos projektų valdymo sprendimų para-mos sistema, pagrįsta sudėtingų sistemų teorija ir daugiakriterinės analizės bei variantinio projektavimo metodais. Darbą sudaro įvadas, trys skyriai, išvados ir pasiūlymai, literatūros sąrašas. Pirmame skyriuje apžvelgiama esama situacija ir pasiekimai projekto val-dymo srityje, valdymo metodai ir sistemos, vertinimo kriterijai ir valdymo pro-ceso modeliavimo principai. Antrame skyriuje analizuojamos marketingo sistemos, efektyvumo para-metrai ir aprašomas sukurtas Integruoto projektų valdymo modelis. Trečiame skyriuje aprašomi sprendimų paramos sistemos elementai, pla-čiai aprašomi sistemos vertinimo komponentų sukūrimas. Pasiūlytasis metodas iliustruotas aprašant aktualaus praktikoje uždavinio sprendimą... [toliau žr. visą tekstą] / The dissertation investigates management of construction project, that of the participating and pursuing the aims interested parties and that of external macro-micro environment influencing the process. Aiming for efficient design and construction project management an integrated analysis of the process stages is needed. The contribution of project, organizational and external envi-ronment factors should also be taken into account. The investigated problem is assigned to an increasing the efficiency of construction project management via employing the multiple criteria decision support methods and information technologies. The aim of the dissertation is the evaluation and enhancement of the effec-tiveness of construction project management by employing the created Model for Integrated Project Management. This model is used to develop the Con-struction Project Management Multiple Criteria Decision Support System based on the complex systems theory and methods of multiple criteria analysis and multi alternative design. The thesis consists of an introduction, three chapters, conclusions and sug-gestions, and the list of references. The first Chapter introduces the current situation and achievements in con-struction management, approaches and systems in construction, valuation crite-ria and modeling principles of the process. The second Chapter is assigned to analysis of marketing systems, effi-ciency values and the developed model for integrated project management. The third... [to full text]
12

Primena multi-kriterijumske analize u dizajniranju energetskih politika orijentisanih ka podršci razvoja obnovljivih izvora energije / Application of multi-criteria analysis in the design of energy policy oriented towards supporting the development of renewable energy sources

Vasić Goran 07 April 2016 (has links)
<p>Razvojem i testiranjem autentičnog modela dokazano je da se primenom multikriterijumske analize uz primenu PROMETHEE metode može kreirati funkcionalan, operativan i primenljiv alat za dizajniranje energetskih politika orijentisanih ka podršci razvoja obnovljivih izvora energije. Model je testiran na energetskom profilu Grada Novog Sada. Pretpostavljeno je da lokalne vlasti Grada Novog Sada imaju nameru da dizajniraju razvojnu politiku/meru sa ciljem da podstaknu korišćenje obnovljivih izvora energije za grejanje stambenih objekata (porodičnih kuća) i pripremu tople sanitarne vode.</p> / <p>Development and testing of an authentic model has proven that the application of multi-criteria analysis by applying the PROMETHEE method can create a functional, operational and applicable tool for designing energy policy oriented towards supporting the development of renewable energy sources. It is assumed that local authorities in Novi Sad have the intetion to design development policies / actions in order to promote the use of renewable source for heating residental buldings (family houses) and hot water.</p>
13

Multikriterieanalys av dagvattenreningstekniker : Med fokus på Västra vägen i Gävle

Engberg, Joakim January 2016 (has links)
Gävle municipality strives to treat all stormwater that may prevent river and lakes from achieving a good water status under the EU water framework directive. There are three stormwater outflows at Västra vägen in Gävle that discharge untreated stormwater to Gavleån. Gävle municipality has an ambition to clean stormwater as close to the source as possible. The purpose of this study is to conduct a multi-criteria analysis to identify stormwater treatment solutions that are suitable from a technical, ecological, economic and sociocultural perspective. According to EU water framework directive Gavleån does not achieve a good chemical and ecological status because of the presence of contaminates in the river. The alternatives that will be evaluated in the multi-criteria analysis consists of a screen pool, percolation storage and four different types of filters. Except these six solutions a null alternative will be included to evaluate if the situation does not change and the stormwater is not treated as it is today. These seven alternatives will be evaluated by a panel that consists of people who work with stormwater or with matters related to the categories in the multi-criteria analysis. The panel's main priority of categories and criteria is produced by the average value of all participants’ weightings and ratings. The most important category was considered to be the sociocultural perspective and the least important was the technical perspective. The criteria that were considered important for the respective categories were operating and maintenance cost (economic perspective), reduction of pollution (technical perspective), environmental impact, land use (ecological perspective, shared position), and outdoor recreation (sociocultural perspective). The option that received the highest score in the analysis was null alternative followed by the screen pool. That is because the null alternative is considered to have the most positive impact on the socio-cultural perspective, ecological perspective and financial perspective while screen pool scored highest in the technical perspective. The results of the MCA should also be interpreted by different stakeholders' priorities and can be seen in Section 6 in which the scoring of all treatment alternatives are reported. / Gävle kommun strävar efter att rena allt dagvatten som kan försvåra möjligheten att sjöar och vattendrag uppnår en god status enligt EU:s vattendirektiv. Det finns tre dagvattenutlopp vid Västra vägen i Gävle som släpper ut orenat dagvatten till Gavleån. Detta dagvatten har Gävle kommun en ambition av att rena genom ett lokalt omhändertagande så nära källan som möjligt. Syftet med denna studie är att genomföra en multikriterieanalys för att identifiera lösningsåtgärder som kan anses som lämpliga utifrån ett tekniskt, ekologiskt, ekonomiskt och sociokulturellt perspektiv. Enligt EU:s vattendirektiv så uppnår inte Gavleån en god kemisk och ekologiskt status på grund av föroreningar som påträffats under mätningar i ån. Alternativen som kommer att utvärderas i multikriterieanalysen består av en skärmbassäng, perkolationsmagasin samt fyra olika gatubrunnsfilter. Förutom dessa alternativ så inkluderas även ett nollalternativ som avser att ingen förändring sker där dagvattnet inte renas. Dessa sju alternativ kommer att viktas av en viktningsgrupp som består av personer som på olika sätt arbetar med dagvatten eller med frågor som är relaterade till kriterierna i multikriterieanalysen. Viktningsgruppens prioriteringar av kategorier och kriterier framställs genom medelvärdet av alla deltagares betygsättning. Den viktigaste kategorin ansågs vara det sociokulturella perspektivet och den minst viktiga var det tekniska perspektivet. Kriterierna som ansågs viktiga för respektive kategori var drift och underhållskostnad (ekonomiskt perspektiv), reducering av föroreningar (tekniskt perspektiv), miljöpåverkan, markanvändning (ekologiskt perspektiv, delad plats), och rekreation och friluftsliv (sociokulturellt perspektiv). Alternativet som fick högst poäng i viktningen var nollalternativet som blev följt av skärmbassäng. Nollalternativet ansågs ha mest positiv inverkan på det sociokulturella perspektivet, ekologiska perspektivet och ekonomiska perspektivet medans skärmbassäng fick högst poäng under det tekniska perspektivet. Resultatet av multikriterieanalysen ska tolkas efter olika intressenters prioriteringar och kan göras i avsnitt 7 där poängsättningen av alla reningstekniker redovisas.
14

An integrated method of environmental assessment coupling a geographic information system to multi-criteria analyysis

Kurka, Thomas January 2014 (has links)
This thesis develops and applies an integrated method of environmental assessment that couples a geographic Information system (GIS) to Multi-Criteria Analysis (MCA), using bioenergy combustion and CHP sites as a case study. A literature review to identify the gaps in knowledge with respect to spatial MCA and GIS-based approaches to support decision-making and sustainability assessments shows the need for an approach to identify suitable locations for Combined Heat and Power (CHP) plants using bioenergy combustion and to analyse spatial aspects. CHP plants can improve the efficiency and sustainability of bioenergy generation because they are capable of producing and utilising both electrical and thermal energy. Identifying suitable locations for these, typically decentralised, plants is crucial but challenging because proximity to both feedstock supply and heat demand has to be considered. The thesis develops and applies a novel GIS-based approach to identify suitable locations for CHP bioenergy plants and to analyse spatial aspects. This work stands out as the principal novel contribution of the research presented in this thesis. The science-based technical assessment can be integrated in a formal and structured decision support framework (DSF) which could aid environmental decision-making. There is no single right way to conduct a decision-making process because every process is limited by resources and timelines. The environmental assessment case study described in this thesis uses a modified version of the MCA framework proposed by the Department for Communities and Local Government (2009). The GIS-based approach is integrated in this DSF to couple GIS to MCA. Additionally, specific attention is given to reviewing and selecting sustainability aspects (covering Criteria and Indicators) and MCA methods. These processes are also integrated in the DSF and can be seen as being part of the problem structuring phase of the DSF used in the research presented in this thesis. It is shown how the DSF is applied to assess alternatives for centralised and decentralised generation in a research case study region. By applying the different stages of the DSF, including the GIS-based approach, the selection processes and a selected MCA method (Analytic Hierarchy Process (AHP)), it can be concluded that the decentralised alternatives should be preferred in the research case study scenarios if regional sustainable bioenergy generation wants to be archived. In the first scenario, the second alternative (A2) clearly dominates with an overall score of 71.82% (A1: 28.18%). However, the results are relatively close in the second scenario (A3: 56.62%, A4: 43.38%), which is mainly due to the similarity of the alternatives in the scenario. The sensitivity analyses show that the rankings of alternatives do not change in both scenarios unless major criteria weight variations or performance adjustments are made.
15

Estabelecimento de Benchmarking em distribuidoras de energia elétrica

Oliveira, Régia Cristina Chagas de January 2010 (has links)
A busca por marcos comparativos adequados aos processos, produtos e serviços de uma concessionária de energia elétrica têm sido difundida pela Associação Brasileira de Distribuidoras de Energia Elétrica (ABRADEE). Anualmente, esta Associação promove a avaliação dos processos de avaliação da satisfação do cliente, gestão operacional, gestão econômico-financeira e responsabilidade social. Ao exemplo do que ocorre com as empresas participantes da Fundação Nacional da Qualidade (FNQ), é disponibilizado um banco de dados das empresas participantes para realização de Benchmarking de Melhores Práticas. Este trabalho apresenta a proposta de um método para identificação do benchmark mais adequado para comparação de processos entre empresas participantes da ABRADEE utilizando um modelo de análise multicritério que possa auxiliar na escolha deste referencial comparativo. Para a elaboração deste método, buscou-se discutir na revisão bibliográfica alguns assuntos como competitividade, modelos de gestão, avaliação e indicadores de desempenho, benchmarking, assim como métodos de análise multicritério. O método proposto apresenta como diferencial do método já utilizado pela ABRADEE a possibilidade de comparação de empresas com o mesmo perfil organizacional: extensão de rede, tipo de rede de distribuição e número de empregados próprios e terceiros são exemplos. Como resultado do trabalho foi possível hierarquizar logicamente os processos de benchmarking e de análise multicritério para escolha do melhor referencial comparativo, assim como a facilitação do processo de melhores práticas através da seleção do benchmarking adequado. A sua prática deve servir como norteadora e facilitadora da gestão, imputando transparência e confiabilidade aos processos, assim como na obtenção dos resultados esperados pelos Acionistas. / The search for appropriate benchmarks to processes, products and services of an electric utility concessionary have been circulated by the Brazilian Association of Electricity Distributors (ABRADEE). Annually this Association promotes the ratings of customer satisfaction evaluation, operational management, economic-financial management and social responsibility. As an example of what happens to the companies participating in the National Quality Foundation (FNQ) a database of participating companies is available to carry out Benchmarking for Best Practices. This paper presents a proposed method to identify the most appropriate benchmark to compare cases between companies that participate in the ABRADEE using a multicriteria analysis model that can help to select this comparative reference. Due to the development of this method, we attempted to discuss in the literature review some issues such as competitiveness, governance, evaluation and performance indicators, benchmarking, as well as methods of multicriteria analysis. The proposed method is a distinct formulation of the method already used by ABRADEE, the comparison of companies with the same organizational profile: network extension, network type of distribution and number of own and third-party employees are examples. As a result of the work it was possible to logically prioritize the processes of benchmarking and multicriteria analysis to choose the best comparative reference, as well as facilitating the process of best practices by selecting the appropriate benchmark. Its practice should suit to guide and facilitate the management charging transparency and accountability procedures, as well as achieving the results expected by shareholders.
16

Proposta de uma sistemática para análise multicriterial de investimentos

Souza, Joana Siqueira de January 2008 (has links)
A análise de investimentos é um processo de vital importância para uma organização, pois envolve o orçamento de capital da empresa na busca de projetos que tragam rentabilidade, perpetuidade, além de ter ligação direta com os objetivos estratégicos traçados. Entretanto, este processo muitas vezes não é discutido internamente nas empresas, as quais geralmente focam somente na etapa de avaliação econômica dos projetos, não desenvolvendo o processo de uma forma sistêmica e estruturada, nem considerando outros aspectos qualitativos na decisão. Desta forma, o presente trabalho apresenta um proposta de sistemática para análise multicriterial de investimentos, discutindo particularmente as quatro grandes fases do processo de análise: identificação, avaliação, priorização e seleção e acompanhamento de projetos. Para cada fase, algumas etapas e atividades foram definidas e posteriormente validadas em uma empresa do ramo automotivo. Para auxiliar a estruturação da sistemática são utilizados métodos de avaliação econômica tradicionais como VPL, TIR e payback, além de um método de análise multicriterial, chamado NCIC, e do uso de programação linear para definição de um portfólio ótimo de investimentos. O uso em conjunto de tais métodos permitiu a elaboração de uma ferramenta chamada PAMP – Planilha para Avaliação Multicriterial de Investimentos. Durante a validação da sistemática foi definida uma equipe multifuncional para a busca e avaliação de investimentos. Esta equipe foi treinada, os fluxos de caixa dos projetos elencados foram projetados e a partir do uso da PAMP dois ranking foram desenvolvidos: primeiramente, um ranking econômico, ordenando os projetos conforme seus resultados (VPL), e em um segundo momento, um ranking multicriterial, incorporando ao VPL o valor agregado dos atributos qualitativos de cada projeto. Após, usando programação linear, foi modelado o portfólio ótimo sob o ponto de vista econômico e qualitativo, incorporando o racionamento de capital entre outras restrições. Como resultado observou-se que apesar dos atributos qualitativos serem relevantes para a tomada de decisão, o critério que mais influencia a empresa ainda é o econômico. Além disso, percebeu-se uma boa aderência da sistemática proposta no ambiente empresarial, destacando como principais benefícios (i) a estruturação de uma lista de projetos, discutindo as origens dos mesmos e suas ligações com a estratégia da empresa; (ii) capacitação dos colaboradores formando uma estrutura de apoio interna que dê suporte conceitual ao processo de análise de investimentos; (iii) estruturação lógica do processo de análise de investimentos, indicando ferramentas de simples uso e com potencial interação; e (iv) melhoria contínua do processo através da comparação projetado versus realizado e retroalimentação do sistema de análise de investimentos. / Investment analysis is a key process in organizations. It involves the capital budgeting of companies to identify projects that brings profitability, perpetuity and direct connection with strategic goals. However, this kind of process is not often internally discussed in companies, which usually focus on the economic evaluation phase only, in spite of a structured process where qualitative aspects are considered in the decision-making. This work presents a method for multi-criteria investment analysis, particularly discussing the four most important phases in the analysis: identification, evaluation, prioritization and selection and project monitoring. In each phase, steps and activities are defined and illustrated through an application in an automotive company. Traditional evaluation methods, such as NPV, IRR and payback, in addition to a multi-criteria decision-making technique, named NCIC, and linear programming are used to support the method. The use of such techniques led to the creation of an analysis tool called PAMP – Spreadsheet for Multi-criteria Investments Analysis. During the application of the method a multi-functional team was selected and trained to search and evaluate investment opportunities. The projects cash flows were specified and, through the use of PAMP, two rankings were developed: an economic ranking, ordering the results of each project (NPV), and a multi-criteria ranking, including qualitative aspects of each project. Next, linear programming was used and a project portfolio was modeled considering economic and qualitative issues, such as capital rationing and other restrictions. As a result, it was observed that despite the fact that qualitative aspects are important in the final decision, the economic aspect is still the main drive in the company. In addition, it was verified that the proposed method was adapted successfully to the company environment; its main benefits: (i) the creation of a project list, stressing its connections to the firm strategy; (ii) training of a team that gives support to the investment analysis process; (iii) creation of a logical structure for investment analysis,based on powerful yet easy to use tools; and (iv) continuous improvement of the process.
17

Evaluation of tartrate stabilisation technologies for wine industry.

Low, Lin Lin. January 2007 (has links)
In the Australian wine industry, cold stabilisation is a widely used industrial process to prevent tartrate instability in bottled wines. This process involves cooling the wine close to its freezing point for extended periods, thereby inducing tartrate precipitation. However, it has several important disadvantages. Consequently, alternative methods to cold stabilisation have been developed. This includes electrodialysis, nanofiltration and contact processes. In this study, current knowledge regarding performance and cost of cold stabilisation and alternative technologies for tartrate stabilisation is reviewed. Whilst there have been occasional cost comparisons between cold stabilisation and alternative technologies, existing data is not suitable for properly evaluating the relative economics of the different process options. Therefore, alternative technologies to cold stabilisation, including the Westfalia process, nanofiltration and electrodialysis were compared for both technical and economic performance. Berri Estates Winery was used as the basis for engineering calculations and conceptual cost estimates. This is the first time that such a comprehensive evaluation has been undertaken of a broad range of alternative technologies for tartrate stabilisation during wine production. Product loss was a key cost driver in differentiating tartrate stabilisation processes. Cold stabilisation was found to be the most economic treatment process irrespective of scale or winery size. The Westfalia process and nanofiltration were the next most cost effective options. Data for economic evaluation and environmental assessment were summarised in a survey form that was circulated to technical experts from Hardy Wine Company, the Australian Wine Research Institute (AWRI) and the University of Adelaide. The purpose of the survey was to obtain the experts’ opinions on the merits of the alternative technologies. The results of this survey were used for comparison between current cold stabilisation and alternative technologies, by performing multi-criteria decision analysis (MCDA). This represents an original application of MCDA techniques to decision making in the wine industry. The MCDA analysis identified a strong preference by experts for nanofiltration combined with centrifugation as an alternative to cold stabilisation. As a consequence, laboratory investigations and field testing of nanofiltration were conducted to obtain new and practical information which was not presently available and relevant to understanding and implementing this process for tartrate stabilisation of wine. The laboratory experiments were performed with a range of membranes and tartrate unstable wines (i.e. Semillon, Colombard and Shiraz) using a purpose-designed laboratory-scale continuously-stirred batch-test membrane cell. The results showed that a range of commercial nanofiltration membranes with a nominal molecular weight cut-off (MWCO) between 200 and 500 Daltons (Da) were able to achieve tartrate stabilisation of all wines tested. This was achieved at moderate pressures less than 20 bar with a recovery of at least 50 %. It was also observed that seeding of wine following nanofiltration might reduce the holding time required to achieve stability and also enable reductions in the recovery rate to values of less than 50 %. The field testing was performed at Berri Estates Winery in the Riverland region of South Australia. The testing was performed using an existing commercial membrane system. This membrane system was already used for juice/wine concentration. The nanofiltration membranes had a nominal MWCO of 300 Da. The testing was conducted on Colombard and Shiraz wines. The field tests confirmed that nanofiltration could successfully tartrate stabilise Colombard and Shiraz wines at recoveries of 50 %; without seeding; within relatively short holding periods of less than four hours; and at flux rates between 5 and 10 L/m²/h. Crystallisation kinetics were also studied. At low recovery, the crystallisation was initially controlled by diffusion step, then surface integration. However, at high recovery, the crystallisation was controlled solely by surface integration. Sensory testing (by duo-trio difference tests) produced adverse sensory outcomes when compared with treatment of the same wines by cold stabilisation. Unfortunately, it could not be established whether this problem was inherent to the process or arose from unrelated factors. Setting aside the adverse sensory result, this is the first time that technical feasibility of nanofiltration for tartrate stabilisation has been successfully demonstrated. Further field testing and sensory evaluation of nano-filtered wines should be carried out to verify the effect of nanofiltration on wines. If the process is successful and favourable, the process design for implementation of a production scale nanofiltration for tartrate stabilisation should then be optimised. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1292872 / Thesis (Ph.D.) -- University of Adelaide, School of Chemical Engineering, 2007.
18

Evaluation of tartrate stabilisation technologies for wine industry.

Low, Lin Lin. January 2007 (has links)
In the Australian wine industry, cold stabilisation is a widely used industrial process to prevent tartrate instability in bottled wines. This process involves cooling the wine close to its freezing point for extended periods, thereby inducing tartrate precipitation. However, it has several important disadvantages. Consequently, alternative methods to cold stabilisation have been developed. This includes electrodialysis, nanofiltration and contact processes. In this study, current knowledge regarding performance and cost of cold stabilisation and alternative technologies for tartrate stabilisation is reviewed. Whilst there have been occasional cost comparisons between cold stabilisation and alternative technologies, existing data is not suitable for properly evaluating the relative economics of the different process options. Therefore, alternative technologies to cold stabilisation, including the Westfalia process, nanofiltration and electrodialysis were compared for both technical and economic performance. Berri Estates Winery was used as the basis for engineering calculations and conceptual cost estimates. This is the first time that such a comprehensive evaluation has been undertaken of a broad range of alternative technologies for tartrate stabilisation during wine production. Product loss was a key cost driver in differentiating tartrate stabilisation processes. Cold stabilisation was found to be the most economic treatment process irrespective of scale or winery size. The Westfalia process and nanofiltration were the next most cost effective options. Data for economic evaluation and environmental assessment were summarised in a survey form that was circulated to technical experts from Hardy Wine Company, the Australian Wine Research Institute (AWRI) and the University of Adelaide. The purpose of the survey was to obtain the experts’ opinions on the merits of the alternative technologies. The results of this survey were used for comparison between current cold stabilisation and alternative technologies, by performing multi-criteria decision analysis (MCDA). This represents an original application of MCDA techniques to decision making in the wine industry. The MCDA analysis identified a strong preference by experts for nanofiltration combined with centrifugation as an alternative to cold stabilisation. As a consequence, laboratory investigations and field testing of nanofiltration were conducted to obtain new and practical information which was not presently available and relevant to understanding and implementing this process for tartrate stabilisation of wine. The laboratory experiments were performed with a range of membranes and tartrate unstable wines (i.e. Semillon, Colombard and Shiraz) using a purpose-designed laboratory-scale continuously-stirred batch-test membrane cell. The results showed that a range of commercial nanofiltration membranes with a nominal molecular weight cut-off (MWCO) between 200 and 500 Daltons (Da) were able to achieve tartrate stabilisation of all wines tested. This was achieved at moderate pressures less than 20 bar with a recovery of at least 50 %. It was also observed that seeding of wine following nanofiltration might reduce the holding time required to achieve stability and also enable reductions in the recovery rate to values of less than 50 %. The field testing was performed at Berri Estates Winery in the Riverland region of South Australia. The testing was performed using an existing commercial membrane system. This membrane system was already used for juice/wine concentration. The nanofiltration membranes had a nominal MWCO of 300 Da. The testing was conducted on Colombard and Shiraz wines. The field tests confirmed that nanofiltration could successfully tartrate stabilise Colombard and Shiraz wines at recoveries of 50 %; without seeding; within relatively short holding periods of less than four hours; and at flux rates between 5 and 10 L/m²/h. Crystallisation kinetics were also studied. At low recovery, the crystallisation was initially controlled by diffusion step, then surface integration. However, at high recovery, the crystallisation was controlled solely by surface integration. Sensory testing (by duo-trio difference tests) produced adverse sensory outcomes when compared with treatment of the same wines by cold stabilisation. Unfortunately, it could not be established whether this problem was inherent to the process or arose from unrelated factors. Setting aside the adverse sensory result, this is the first time that technical feasibility of nanofiltration for tartrate stabilisation has been successfully demonstrated. Further field testing and sensory evaluation of nano-filtered wines should be carried out to verify the effect of nanofiltration on wines. If the process is successful and favourable, the process design for implementation of a production scale nanofiltration for tartrate stabilisation should then be optimised. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1292872 / Thesis (Ph.D.) -- University of Adelaide, School of Chemical Engineering, 2007.
19

Lokaliseringsutredning för nytt hotell i Sandvikens tätort med stöd av multikriterieanalys

Johansson, David, Andersson, Daniel January 2008 (has links)
<p><p>The municipality of Sandviken is in a state of strong growth. This affects the need for more hotel rooms in Sandviken, in a way that it’s profitable to invest in a new hotel. Sandvikens largest company, the steal industry Sandvik AB, grows just like Sandviken, and have great influence on the need of more hotel rooms. Today there are three hotels placed in Sandviken, and these hotels aren’t enough when the pressure of hotel guests is at its top.</p><p>The purpose with the project was to analyse the criteria’s that are important for localization of a new hotel in the Sandviken, and to clarify what kind of hotel Sandviken is in need of. The need of hotel rooms in Sandviken where to be challenged during the investigation.</p><p>To find the most appropriate locations, a multi-criteria analysis was used that was based on the weighting of criteria from a questionnaire study. The questionnaire study contained two parts. The first part where selecting which criteria’s the multi-criteria analysis would include. The other part was weighting the selected criteria’s to be able to input them in the multi-criteria analysis. The weighting where made by selected persons, chosen due to their skills in the particular area. The selected criteria’s in the multi-criteria analysis where: traffic noise, proximity to sports arena, proximity to park area, proximity to travel centre, proximity to restaurants, proximity to Sandbacka park and proximity to Sandvik AB.</p><p>When the multi-criteria analysis was done, it presented which areas that had the highest values. The mean value for all the selected weightings gave the results of high values in the central parts of Sandviken. This analysis where then complimented with a visual stock-taking of selected areas around Sandviken that where considered free space for building new hotel.</p><p>The investigation shows that there is a need for more hotel rooms in Sandviken at the moment. This need for hotel rooms will probably grow cause of the recruitment of new personnel by Sandvik AB, and the fact that three new sports arenas is planned to be built in Sandviken. The questionnaire studies shows that the category of hotels with the most need in Sandviken, is especially business hotels. The reason for this is mostly due to Sandvik AB. The areas that are most appropriate for hotel establishment in Sandviken, are located in the central parts of Sandviken.</p></p> / <p><p>Sandvikens kommun befinner sig i ett starkt växande tillstånd, det påverkar behovet av fler hotellrum på så sätt att ny etablering av hotell är aktuellt. Sandvikens största företag, stålindustrin Sandvik AB, växer precis som Sandviken, och det har stor påverkan på behovet av fler hotellrum. I Sandvikens tätort finns idag tre hotell, som inte klarar behovet av hotellgäster när antalet gäster är som mest. Dessa är Alséns hotell, Stadshotellet Princess och Högbo Brukshotell.</p><p>Syftet med arbetet var att analysera vilka kriterier som är viktiga för lokalisering av ett nytt hotell i Sandvikens tätort, samt att klargöra vilken kategori av hotell Sandviken är i behov av. Behovet av fler hotellrum i Sandvikens tätort ifrågasattes även under utredning.</p><p>För att hitta de platser som är lämpligast, användes en multikriterieanalys som grundade sig på viktade kriterier från en enkätundersökning. Enkätundersökningen bestod utav två delar. Den ena delen valde ut vilka kriterier som skulle ingå i multikriterieanalysen. Den andra delen viktade de utvalda kriterierna för att sedan matas in i multikriterieanalysen, viktningen skedde med hjälp utav utvalda personer som ansågs kunniga på området. De utvalda kriterierna till multikriterieanalysen var: närhet till större idrottsanläggning, buller (hur viktigt det är med låg nivå av buller), närhet till handel, närhet till parkområde, närhet till resecentrum, närhet till restauranger, närhet till Sandbacka park och närhet till Sandvik AB.</p><p>Multikriterieanalysen visade sedan vilka områden som gav de högsta värdena. Medelvärdet för alla de utvaldas viktningar gav ett resultat av höga värden vid centrala delarna av Sandvikens tätort. Denna analys kompletterades sedan med en visuell inventering av utvalda områden som ansågs lediga platser för hotellbygge.</p><p>Utredningen visar att det i dagsläget finns behov av fler hotellrum i Sandvikens tätort. Detta behov kommer med all sannolikhet att öka på grund av att Sandvik AB anställer ny personal, samt att tre nya idrottsarenor byggs i Sandvikens tätort. Enkätundersökningarna visar att den kategori av hotell som det finns störst behov av i Sandvikens tätort är framförallt företagshotell. Detta beror framförallt på storföretaget Sandvik AB. De områden som är lämpligast för etablering av hotell i Sandvikens tätort, enligt den multikriterieanalys som gjorts, är de centrala delarna av Sandvikens tätort.</p></p>
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Building Consensus using a Collaborative Spatial Multi-Criteria Analysis System

Taranu, John P. January 2009 (has links)
This thesis studies the use of a collaborative spatial Multi-Criteria Analysis tool in site evaluation with multiple participants. The approach is situated within the context of three concepts of space, choice and participation, and is informed by fields as diverse as Decision-Making, Participatory Planning, Geographical Information Systems, Decision Support Systems, Voting, and Group Collaboration. A collaborative spatial Multi-Criteria Analysis software tool called MapChoice was designed for this thesis, built upon open source components and featuring easy-to-use decision support functionality in both single-user and collaborative modes. MapChoice was then evaluated in a real-world site selection situation with a case study on the location of much-needed affordable housing in the Town of Collingwood, Ontario. Based on previous discussions and workshops on the project, a workshop was held with a group of community housing advocates to compare a set of possible sites for an affordable housing project according to a set of spatial and aspatial criteria. The study indicates that a collaborative spatial MCA approach can be used in dealing with complex planning problems, and that it has the potential to contribute to improved consensus between participants.

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