abstract: In the former British colony of Malaya, communism is a controversial subject that often invites significant scrutiny from government officials and pro-British scholars who describes the radical movement as a foreign conspiracy to dominate the small Southeast Asian nation. The primary goal of this thesis, therefore, is to reinterpret and revise the current established history of Malayan communism in a chronological and unbiased manner that would illustrate that the authoritative accounts of the movement was not only incomplete but was also written with explicit prejudice. The secondary goal of this thesis is to argue that the members of the Malayan Communist Party were actually nationalists who embraced leftist ideology as a means to fight against colonialism. By examining the programs and manifestoes issued by the Party over the years, it is clear that the communists were in fact had been arguing for social reforms and independence rather than a Russian-style proletarian revolution. This research scrutinizes the authoritative texts written by Cold War-era scholars such as Gene Hanrahan as well as newly published historical analysis of the period by Cheah Boon Kheng in addition to memoirs of surviving members of the Party such as Chin Peng and Abdullah C.D. The evidence indicates that early understandings of the Malayan communist movement were heavily influenced by Cold War paranoia and that over time it had become the accepted version of history. / Dissertation/Thesis / M.A. History 2011

För ett företag eller en organisation kan det vara av stor vikt att kunna utvärdera en IT-investering då denna kan leda till nytta för organisationen. Ur kundens perspektiv är det viktigt att välja den investering som passar just deras organisation och därför är det viktigt med rätt information så att valet blir rätt. Därför är det viktigt att kunna identifiera de kriterier som företaget anser att en IT-investering ska uppfylla. Detta arbete inriktas därför till att undersöka vilka kriterier en IT-investering ska uppfylla för att skapa nytta för organisationen. Resultatet visar något olika kriterier uppkommit från de olika företagen som har undersökts. Genom att utföra litteraturstudier och enkätundersökning har det kunnat göras en jämförelse mellan de rådande åsikterna på företagen och det som litteraturen säger. Resultatet visar också att det finns ett antal anledningar till att byta/införa ett nytt affärssystem som är ganska lika mellan respondenterna. Vidare är de förväntningar som som finns på ett nytt affärssystem också relativt lika mellan de olika företagen som ingick i enkätundersökningen. Vidare i detta arbete ges en detaljerad beskrivning av en existerande modell som kan användas för att värdera nyttan av en IT-investering – PENG. Som resultat av detta arbete har de kriterier/mått som framkommit även kopplats till PENG-modellen, efter en jämförelse med litteratur.

Pour satisfaire aux dernières réglementations en matière d'émissions, des progrès importants sont encore attendus des moteurs à combustion interne. De plus, améliorer l'efficacité du moteur pour réduire les émissions et la consommation de carburant est devenu plus essentiel qu'auparavant. Mais, de nombreux phénomènes complexes restent mal compris dans ce domaine, tels que le processus d'injection de carburant. Nombreux logiciels pour la dynamique des fluides numérique (CFD) prenant en compte le changement de phase (comme la cavitation) et la modélisation de l’injection ont été développés et utilisés avec succès dans le processus d’injection. Néanmoins, il existe peu de codes CFD capables de simuler avec précision des conditions d’injection transcritiques, à partir d'une condition de température de carburant sous-critique vers un mélange supercritique dans la chambre de combustion. En effet, la plupart des modèles existants peuvent simuler des écoulements à phase unique, éventuellement dans des conditions supercritiques, ou des écoulements diphasiques dans des conditions sous-critiques. Par conséquent, il manque un modèle complet capable de traiter les conditions transcritiques, y compris la transition de phase possible entre les régimes souscritiques et supercritiques, ou entre les écoulements monophasiques et diphasiques, de manière dynamique. Cette thèse a pour objectif de relever ce défi.Pour cela, des modèles d'écoulement diphasique compressible de fluide réel basés sur une approche eulérienne-eulérienne avec prise en compte de l'équilibre de phase ont été développés et discutés dans le présent travail. Plus précisément, un modèle à 6-équation entièrement compressibles incluant les équations de bilan des phases liquide et gazeuse résolues séparément ; et un modèle à 4-équation qui résout les équations des bilans liquide et gazeux en équilibre mécanique et thermique sont proposés dans ce manuscrit. L’équation d’état Peng-Robinson EoS est sélectionné pour fermer les deux systèmes et pour faire face aux éventuels changements de phase et à la transition ou à la séparation des phases. En particulier, un solveur d'équilibre de phase a été développé et validé. Ensuite, une série de tests académiques 1D portant sur les phénomènes d'évaporation et de condensation effectués dans des conditions sous-critiques et supercritiques a été simulée et comparée aux données de la littérature et aux résultats académiques disponibles. Ensuite, les modèles d'écoulement en deux phases entièrement compressibles (systèmes à 6-équation et à 4- équation) ont été utilisés pour simuler les phénomènes de cavitation dans une buse 3D de taille réelle afin d'étudier l'effet de l’azote dissous sur la création et le développement de la cavitation. Le bon accord avec les données expérimentales prouve que le solveur proposé est capable de gérer le comportement complexe du changement de phase dans des conditions sous-critiques. Enfin, la capacité du solveur à traiter l’injection transcritique à des pressions et températures élevées a été validée par la modélisation réussie de l’injecteur Spray A du réseau de combustion moteur (ECN). / To satisfy latest stringent emission regulations, important progress is still be expected from internal combustion engines. In addition, improving engine efficiency to reduce the emission and fuel consumption has become more essential than before. But many complex phenomena remain poorly understood in this field, such as the fuel injection process. Numerous software programs for computational fluid dynamics (CFD) considering phase change (such as cavitation) and injection modelling, have been developed and used successfully in the injection process. Nevertheless, there are few CFD codes able to simulate correctly transcritical conditions starting from a subcritical fuel temperature condition towards a supercritical mixture in the combustion chamber. Indeed, most of the existing models can simulate either single-phase flows possibly in supercritical condition or two-phase flows in subcritical condition; lacking therefore, a comprehensive model which can deal with transcritical condition including possible phase transition from subcritical to supercritical regimes, or from single-phase to two-phase flows, dynamically. This thesis aims at dealing with this challenge. For that, real fluid compressible two-phase flow models based on Eulerian-Eulerian approach with the consideration of phase equilibrium have been developed and discussed in the present work. More precisely, a fully compressible 6-equation model including liquid and gas phases balance equations solved separately; and a 4-equation model which solves the liquid and gas balance equations in mechanical and thermal equilibrium, are proposed in this manuscript. The Peng-Robinson equation of state (EoS) is selected to close both systems and to deal with the eventual phase change or phase transition. Particularly, a phase equilibrium solver has been developed and validated. Then, a series of 1D academic tests involving the evaporation and condensation phenomena performed under subcritical and supercritical conditions have been simulated and compared with available literature data and analytical results. Then the fully compressible two-phase flow models (6-Equation and 4-Equation systems) have been employed to simulate the cavitation phenomena in a real size 3D nozzle to investigate the effect of dissolved N2 on the inception and developing of cavitation. The good agreement with experimental data proves the solver can handle the complex phase change behavior in subcritical condition. Finally, the capability of the solver in dealing with the transcritical injection at high pressure and temperature conditions has been further validated through the successful modelling of the engine combustion network (ECN) Spray A injector.

Atualmente, com tecnologias sendo desenvolvidas para que as plantas industriais se tornem cada vez mais eficientes, é necessário a compreensão e o conhecimento com grande precisão das propriedades termodinâmicas dos fluidos e compostos envolvidos em processos como a destilação, extração líquido-líquido, entre outros. Para tal, modelagens termodinâmicas são feitas visando determinar o comportamento de fases e a qualidade de misturas presentes nas etapas dos processos industriais e até mesmo do produto final. Entre os modelos termodinâmicos mais utilizados, a equação de estado de Peng-Robinson com Translação de Volume fornece ótimos resultados para o equilíbrio de fases líquido-vapor de substâncias puras e misturas. Esta equação foi utilizada, em conjunto ao método de Contribuição de Grupos, para realizar a modelagem termodinâmica de vários sistemas binários contendo componentes presentes no biodiesel, a baixas e altas pressões. Além disso, foi feita a análise experimental e o teste de consistência termodinâmica do sistema metanol + palmitato de metila à pressão constante de 1,0 bar. Os pontos experimentais deste sistema considerados termodinamicamente consistentes também foram modelados com a mesma equação de estado. Os resultados mostraram que a equação de Peng-Robinson com Translação de Volume e Contribuição de Grupos fornece baixos erros relativos, podendo ser usada em simulações de processos de produção e purificação de biodiesel. / Nowadays, with technologies being developed for industrial plants to increase their efficiency, it is necessary to understand and to know with good accuracy the thermodynamic properties of the fluids and compounds involved in processes such as distillation, liquid-liquid extraction, and others. To this purpose, thermodynamic modeling for these substances is done aiming to determine the phase behavior of mixtures present in the industrial processes and even in the final product. Among the used thermodynamic models, there is the Volume Translated Peng-Robinson equation of state, which provides good results for the liquid-vapor phase equilibrium of mixtures and pure substances. This equation was used with the Group Contribution method to model thermodynamically several binary systems containing biodiesel components at low and high pressures. In addition, the experimental analysis and the thermodynamic consistency test for the system methanol + methyl palmitate at constant pressure of 1,0 bar was done. The points of this system considered thermodynamically consistent were also modeled with the same equation of state. The results showed that the Volume Translated Peng-Robinson equation with Group Contribution provides low relative errors and can be used in simulations of biodiesel production and purification processes.

[pt] O setor da refrigeração possui um papel essencial e crescente na economia global, com um aumento na quantidade de sistemas operantes. A necessidade de desenvolver novos refrigerantes tem sido cada vez mais frequente, a fim de atender a legislações ambientais cada vez mais rigorosas. Igualmente, medidas envolvendo a introdução de novos materiais, como os nanofluidos, tem sido uma constante. Neste trabalho, um sistema de refrigeração usando uma mistura nanolubrificante POE-diamante e refrigerante R410A foi simulado. Dados experimentais cedidos pela Universidade Federal de Uberlândia (UFU) foram usados para a elaboração e validação do modelo. O simulador utiliza a equação de Peng-Robinson para o cálculo das propriedades termodinâmicas e o método de fronteira móvel para a modelagem dos trocadores. O impacto das nanopartículas em relação aos parâmetros críticos foi avaliado a partir do princípio do isomorfismo e da natureza de ambos os materiais: fluido base e nanopartículas. A convergência da simulação do ciclo de refrigeração foi obtida com o método do simplex modificado, que mostrou-se adequado para tal aplicação, apresentando convergência satisfatória em todos os casos. As temperaturas de evaporação, condensação e de descarga do compressor são obtidas a partir das condições de operação do compressor, dos dois fluidos de transferência de calor, do grau de superaquecimento no evaporador e também do grau de subresfriamento no condensador. Superfícies de resposta foram criadas a fim de avaliar o efeito de cada uma das variáveis (temperatura de evaporação, frequência do compressor e concentração de nanopartículas) utilizadas no estudo do coeficiente de performance (COP), da capacidade frigorífica e da potência do compressor. A temperatura de evaporação possui um impacto significativo sobre a capacidades frigorífica e o COP, enquanto que a potência é mais afetada pela frequência do compressor. A concentração de nanopartículas, apesar de possuir um efeito marginal, não deve ser desprezada, devido à modificação que causa sobre as propriedades termofísicas da mistura. / [en] The refrigeration sector has an essential and growing role in the global economy, with an increase in the number of operating systems. The need to develop new refrigerants has been increasingly frequent, in order to meet increasingly stringent environmental legislation. Equally, measures involving the introduction of new materials, such as nanofluids, have been a constant. In this work, a cooling system using a POE-diamond nanolubricant mixture and R410A refrigerant was simulated. Experimental data provided by the Federal University of Uberlândia (UFU) were used for the elaboration and validation of the model. The simulation uses the Peng-Robinson equation to calculate thermodynamic properties and the moving-boundary method for modeling the heat exchangers. The impact of the nanoparticles in relation to critical parameters was evaluated based on the principle of isomorphism and the nature of both materials: base fluid and nanoparticles. The convergence of the refrigeration cycle simulation was obtained with the modified simplex method, which proved to be adequate for such application, presenting satisfactory convergence in all cases. Evaporation,condensation and discharge temperatures are obtained from the operating conditions of compressor and both heat transfer fluids, the degree of superheating in the evaporator and also the degree of subcooling in the condenser. Response surfaces were created in order to evaluate the effect of each of the variables (evaporation temperature, compressor frequency and nanoparticle concentration) used in the study of the performance coefficient (COP), refrigeration capacity and compressor power. Results have shown that the evaporation temperature has a significant impact on the cooling capacity and the COP, while the power is mainly affected by the compressor frequency. The nanoparticles concentration, despite having a more attenuated effect, should not be neglected, due to the change it causes to the mixture thermophysical properties.

[pt] A determinação de parâmetros de interação precisos para equações de estado (EdE) em sistemas aquosos de aminas são cruciais para desenvolver modelos termodinâmicos em processos da engenharia química. O sistema binário de Nmetildietanolamina (MDEA) e água na purificação do biogás foi avaliado usando as abordagens 𝜑 – 𝜑 e 𝛾 – 𝜑, EdE de Peng–Robinson clássico com a regra de mistura não aleatória e EdE Peng–Robinson com a regra de mistura Wong-Sandler, para otimizar o fator acêntrico, ω, de componentes puros, e os parâmetros de interação binária, 𝑘𝑖𝑗. Os parâmetros de interação 𝑢𝑖𝑗 das EdE que incorporam o modelo UNIQUAC, como a abordagem γ – φ e a regra de mistura de Wong-Sandler também foram otimizados. Esses parâmetros foram avaliados usando um algoritmo de pressão de bolha reativa, codificação MATLAB e minimização de funções objetivas relacionadas ao desvio médio absoluto, AAD, entre dados experimentais e calculados em diferentes temperaturas. Os ω calculados de água, CO2 e MDEA foram 0,3275, 0,2039 e 1,0133, respectivamente, com AAD inferior aos valores da literatura. A abordagem 𝜑 − 𝜑 com EdE clássica de Peng–Robinson com regra de mistura Wong– Sandler foi mais adequada para o binário MDEA – H2O, resultando em 𝑢12 0 = −234.2841, 𝑢12 𝑇 = 1.0499, 𝑢21 0 = 266.4326, 𝑢21 𝑇 = 0.1966, 𝑘𝑖𝑗 = −0.0715, com pressão de vapor AAD% = 6,57% e composição AAD% = 17,51%. Devido à natureza altamente não ideal do sistema binário CO2 – H2O, nem as abordagens φ – φ ou γ – φ usando as EdE selecionadas resultaram em diagramas precisos de pressão de ponto de bolha para o equilíbrio vapor – líquido (VLE). / [en] Determining interaction parameter for equations of state (EOS) of water – amines systems are crucial to develop accurate models in chemical engineering processes. The binary system of N-methyldiethanolamine (MDEA) and water in biogas purification was evaluated using both φ – φ and γ – φ approaches, classic Peng–Robinson with the empirical “non-random” mixing rule and Peng–Robinson with the Wong-Sandler mixing rule EOS to optimize pure components acentric factor, ω, and binary interaction parameters, 𝑘𝑖𝑗. The interaction parameters 𝑢𝑖𝑗 from EOS that incorporate UNIQUAC model, such as γ – φ approach and Wong-Sandler mixing rule were optimized as well. These parameters were evaluated using a bubble pressure algorithm, MATLAB coding and minimization of objective functions related to absolute average deviation, AAD, between experimental and calculated data at different temperatures. The calculated ω of water, CO2 and MDEA were 0.3275, 0.2039 and 1.0133 respectively with lower AAD than literature values. The 𝜑−𝜑 approach classic Peng–Robinson with Wong – Sandler mixing rule EOS was better suited for the MDEA – H2O binary, resulting in as 𝑢120=−234.2841, 𝑢12𝑇=1.0499, 𝑢210=266.4326, 𝑢21𝑇=0.1966, 𝑘𝑖𝑗=−0.0715, with vapor pressure AAD% = 6.57% and composition AAD% = 17.51%. Due to the highly non-ideal nature of the CO2 – H2O binary system, neither φ – φ or γ – φ approaches using the selected EOS resulted in accurate vapor – liquid equilibrium (VLE) bubble point pressure diagrams.

The purpose of this study was to describe the reasons of Peng-hu medical team participation in infectious disease prevention program. The study discussed the awareness of importance for medical team engaged in disease prevention of community, and obstacles and intervention faced by medical team self-participation in community infectious disease prevention programs. At the end, it discussed cooperated relationships and the essential factors of public-private partnership and also provided conclusion and suggestion to perfect the abilities for medical team self-participation in community infectious disease prevention programs and to have positive functions. The purposes of this study are as follows: (1)to discuss the awareness of importance and advantages and disadvantages of medical team self-participation in community infectious disease prevention programs (2)to know the obstacles of Peng-hu medical team participation in community infectious disease prevention programs. (3)to study the cooperative relationship and essential factors of public-private partnership participation in community infectious disease prevention programs. (4)to conclude the related factors of medical team participation in community infectious disease prevention programs and to compare with the strategies for motivating community infectious disease prevention programs. This study adopted a quality perspective and in-depth interviews. In the research we use the purposive sampling which aims at medical clinic, institute of pharmacy, leaders of medical team member, directors of public healthy center and the head nurses. Besides, we also visited and asked delegates, town or city mayors, principals of school, director generals of community development association and chiefs of village for their advises on medial team who participated in community infectious disease prevention programs in Peng-hu. The conclusions are as follows: (1) it is important for medical team member to participate in community infectious disease prevention programs, because they have professional knowledge and they are at the cutting edge of disease prevention; public healthy center also has to take the responsibility for such program. However, the medical team is usually more utilitarian, so it is necessary to focus on their medical ethic program. (2) The largest benefit for the participation process is that medical team can learn from each other. (3) The obstacles for medical team to participate in infectious disease prevention programs are insufficient manpower, lack of protective equipment, and insufficient finances; therefore, they need help for these three aspects as well. (4) When medical team member promote community infectious disease prevention programs, patients who refuse to go to hospital and cover their condition will be the big obstruction for the program. (5) The understanding of infectious disease and the threat to health are both main factors to affect clinic in participating disease prevention. For public healthy center, the problems are unclear guidelines and political interventions for entire disease prevention. (6) The cross-professional corporation team has to be established and be conducted and integrated by public sector before reaching the goal of disease prevention program. According to the results given above, we suggest that supervisor of healthy care needs to direct and integrate all medical team member and other relevant sectors to organize a corporative team for disease prevention. The information of infectious disease should be announced widely and update frequently. Disease prevention program should be made compulsory in education and medical ethics should be emphasized. Moreover, Organizations without real functioning should be considered abolished for releasing more manpower in the programs.

The Armed Forces is looking to improve control of where articles are and the monitoring of their condition within its clothing supply. That is why Försvarets Materielverk is working on a motion to tag the Armed Forces clothing with passive RFID-tags. A cost/benefit analysis has been made in this report in order to find out whether the investment is economical justifiable and what costs and benefits arose. The analysis tool that was used is based on the PENG-model. The analysis had three scenarios with the difference that each scenario included various amounts of clothing to tag.  There has also been made an analysis where only the benefits regarding decreasing amount of lost clothes and simplified inventory were included. The result of the first analysis was that none of the scenarios was profitable during the first year. Though, after 5-10 years after the introduction, depending on the scenario and the discount rate used for the investment, the investment is profitable. If only the benefits regarding decreasing amount of lost clothes and simplified inventory had been included, the two larger scenarios would be possible to implement but they would only be profitable after a little over ten years. The third scenario included the biggest amount of clothes is most suitable to implement. Despite the cost for the scenario is the highest in comparison to the other two scenarios it creates most benefits and has the shortest payback time. The recommendation is to tag as many clothing as possible. This is because the fixed cost is independent of the amount of articles that is tagged.  The cost depending on how much is tagged is the cost of the RFID-tag and that cost is the largest individual cost but it is compensated by the benefits of tagging larger amounts of articles. / Försvarsmaktens beklädnadsförsörjning efterfrågar en förbättring när det gäller kontroll över var artiklar befinner sig och uppföljning kring vilket skick de är i. Försvarets Materielverk har med anledning av detta fått i uppgift att ta fram förslag på Försvarsmaktens beklädnader skulle kunna märkas med passiva RFID-taggar. I denna rapport har en kostnadsnyttoanalys utförts för att ta fram om investeringen är ekonomiskt försvarbar och vilka nyttor och kostnader som uppkommer. Analysverktyget som användes var baserat på PENG-modellen. Analysen utgår från tre scenarier där skillnaden mellan dem är vilken mängd beklädnader som ska märkas. Resultatet av den första analysen blev att inget av scenarierna blir lönsamt under första året utan tidigast 5-10 år efter införandet, beroende på scenario och vilken diskonteringsränta som använts för investeringen. Det har även gjorts en analys där endast nyttorna vid minskat svinn och förenklad inventering ingick. Skulle fokus endast ligga på dessa nyttor skulle de två större scenarierna vara tillämpbara men återbetalningstiden skulle då öka till drygt 10 år. Det tredje scenariot där mest beklädnad märks upp är mest lämpat att införa. Även om kostnaden för scenariot är störst av de tre skapar det mest nyttor och har kortast återbetalningstid. Det är att rekommendera att märka upp så mycket beklädnader som möjligt då den fasta kostnaden är lika stor oavsett hur mycket som märks upp. Den kostnad som är beroende av antalet artiklar som märks upp är kostnaden för taggar som visserligen är den största enskilda kostnaden men ökningen i total taggkostnad vägs upp av nyttofördelarna.

published_or_final_version / Journalism and Media Studies Centre / Master / Master of Journalism

Ce travail de thèse porte sur l'étude d'un procédé d'époxydation et de carbonatation par CO₂ des huiles végétales ce qui permet de valoriser à la fois les huiles et le CO₂ .Un modèle cinétique passant par la formation in situ de l'acide performique est construit pour l'époxydation de l'acide oléique et de l'huile de coton, en couplant les bilans de matière et d'énergie. Une stratégie permettant de réduire le nombre de paramètre à estimer est adoptée. Ce modèle est potentiellement transposable aux autres huiles ayant une structure similaire, car la réactivité de chaque type d'acide gras est déterminée. Pour la réaction de carbonatation, une étude cinétique est réalisée, et la solubilité et le coefficient de transfert de matière du CO₂ dans la phase liquide sont mesurés en tenant compte de la non idéalité des conditions à l'aide de l'équation d'état de Peng-Robinson. L'utilisation du carbonate obtenu est enfin examinée dans la synthèse de polyuréthanes sans isocyanates (NIPUs). / This thesis focuses on the process aspect of the first two steps in the synthesis of non-isocyanates polyurethanes (NIPUs) from vegetable oils, i.e. epoxidation and carbonation reaction. This process adds value to both vegetable oil and CO₂. A kinetic model by using performic acid formed in-situ is built for epoxidation of oleic acid and cottonseed oil, by coupling the mass balance and energy balance. This model is potentially transferable to other oils with similar structure as the reactivity of each type of fatty acid is determined. For the carbonation reaction, a kinetic study is carried out, and the solubility and the CO₂ mass transfer coefficient in the liquid phase is measured under non-ideal condition using the Peng-Robinson equation of state.