I dagens samhälle används internet för kommunikation mellan människor runtom i världen. Det första videosamtalet gjordes runt år 1940 och det är dags fören utveckling, där 3D är något som skulle kunna göra videomöten mer verkliga.För att möjliggöra detta så konstruerades ett system som skulle kunna ta in datafrån olika time-of-flight- och färgkameror och en ljudenhet. Denna data ska sedankomprimeras och sändas över internet för att kunna spelas upp på någonannans 3D-skärm. För att samtalet inte ska kännas fördröjt måste samtliga delartillsammans ske inom realtid. De utvecklingsmetoder som har använts är parprogrammeringoch en variant utav testdriven utveckling. Systemet har utvärderatsutifrån tidmätningar, bildkvalitet och datastorlek för att hitta en bra balansmellan tid och kvalitet. Systemet konstruerades med fem delar: insamling avbilder och ljud, bilduppskalning, komprimering och avkomprimering, internetöverföringsamt rendering. Resultatet visade att de delar som berörs av datastorlekoch bildkvalitet kunde uppnå en bra balans mellan tid och kvalitet. Dockkunde inte alla mål uppnås då vissa delar tog upp mer tid än realtidsmålet samtatt alla delar inte han konstrueras. Eftersom systemet byggdes upp modulärt såkan de delar som inte uppnådde målen förbättras eller bytas ut. Utifrån resultatetkunde sedan lösningsförslag ges för att förbättra resultaten för en eventuell vidareutveckling. / In todays society internet is used for communication between each other aroundthe world. The first video call was made around the year 1940 and it is time fora development, where 3D is something that can make video calls more real. Tomake this possible a system was constructed that would be able to get data fromdifferent time-of-flight cameras and color cameras and audio devices. That datashould later on be compressed and transmitted over internet to be able to play iton someone else’s 3D-display. To prevent the feeling of delay in the call, allparts together must happen in real time. The development methods that havebeen used is pair programming and a variation of test-driven development. Thesystem has been evaluated by time messurements, image quality and data sizeto find a good balance between time and quality. The system was constructedby five parts: capturing of images and audio, image upscaling, compression anddecompression, network streaming and also rendering. The result showed thatthe parts affected by data size and image quality could achieve a good balancebetween time and quality. However, all goals could not be achieved becausesome parts where too slow for the real time goal to be achieved and also someparts could not be constructed in time. Since the system was built up modularlythe parts that did not achieve the goals can be improved or replaced. Based onthe results, solution proposals was made to improve the results for a possiblefurther development.

Productivity advances generated from ‘lean manufacturing’ are self–evident. Plants that adopt ‘lean’ are more capable of achieving shorter lead times, less waste in the system and higher quality levels. The goal of this study was to ascertain which ‘lean’ tools and techniques are available for use. A matrix was constructed with a summation of the authors who agree that specific ‘lean’ tools will reduce cycle time. It was found that reduced set–up time and waste elimination are most affected by the implementation of ‘lean’ tools and techniques. An empirical study was conducted to confirm the results of the literature study. The respondents’ knowledge on the ‘lean’ tools was also tested. It was found that respondents have a sound understanding of set–up time; they agree that it must be reduced in the plant. Pre–scientific evidence and the response from the empirical study confirm that there is a substantial amount of waste in the factory. A current state value–stream map was drawn from a single welded part Product X. The value–stream was analysed to reduce the cycle time in the process, with the focus on set–up time reduction and waste elimination. The future state value–stream map was drawn, displaying astonishing results. A continuous improvement (kaizen) programme will help reduce the cycle time even further by making use of the other ‘lean’ tools discussed in this study. This programme forms part of the procedure to optimise cycle time. / Thesis (M.B.A.)--North-West University, Potchefstroom Campus, 2012.

Productivity advances generated from ‘lean manufacturing’ are self–evident. Plants that adopt ‘lean’ are more capable of achieving shorter lead times, less waste in the system and higher quality levels. The goal of this study was to ascertain which ‘lean’ tools and techniques are available for use. A matrix was constructed with a summation of the authors who agree that specific ‘lean’ tools will reduce cycle time. It was found that reduced set–up time and waste elimination are most affected by the implementation of ‘lean’ tools and techniques. An empirical study was conducted to confirm the results of the literature study. The respondents’ knowledge on the ‘lean’ tools was also tested. It was found that respondents have a sound understanding of set–up time; they agree that it must be reduced in the plant. Pre–scientific evidence and the response from the empirical study confirm that there is a substantial amount of waste in the factory. A current state value–stream map was drawn from a single welded part Product X. The value–stream was analysed to reduce the cycle time in the process, with the focus on set–up time reduction and waste elimination. The future state value–stream map was drawn, displaying astonishing results. A continuous improvement (kaizen) programme will help reduce the cycle time even further by making use of the other ‘lean’ tools discussed in this study. This programme forms part of the procedure to optimise cycle time. / Thesis (M.B.A.)--North-West University, Potchefstroom Campus, 2012.

Thesis (M. Eng. Sc.)--University of Melbourne, 1994. / Typescript (photocopy). Includes bibliographical references (leaves 123-126).

Thesis (M. Phil.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 151-156).

Thesis (M.Phil.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 151-156) Also available in print.

This thesis concerns three important issues related to the problem of time-inconsistency in decision-making and revealed preference analysis. The first chapter focuses on the welfare properties of equilibria in exchange economies with time-dependent preferences. We reintroduce the notion of time-consistent overall Pareto efficiency proposed by Herings and Rohde (2006) and show that, whenever the agents are sophisticated, any equilibrium allocation is efficient in this sense. Thereby, we present a version of the First Fundamental Welfare Theorem for this class of economies. Moreover, we present a social welfare function with maximisers that coincide with the efficient allocations and prove that every equilibrium can be represented by a solution to the social welfare optimisation problem. In the second chapter we concentrate on the observable implications of various models of time-preference. We consider a framework in which subjects are asked to choose between pairs consisting of a monetary payment and a time-delay at which the payment is delivered. Given a finite set of observations, we are interested under what conditions the choices of an individual agent can be rationalised by a discounted utility function. We develop an axiomatic characterisation of time-preference with various forms of discounting, including weakly present-biased, quasi-hyperbolic, and exponential, and determine the testable restrictions for each specification. Moreover, we discuss possible identification issues that may arise in this class of tests. Finally, in the third chapter, we discuss the testable restrictions for production technologies that exhibit complementarities. Suppose that we observe a finite number of choices of input factors made by a single firm, as well as the prices at which they were acquired. Under what conditions imposed on the set of observations is it possible to justify the decisions of the firm by profit-maximisation with production complementarities? In this chapter, we develop an axiomatic characterisation of such behaviour and provide an easy-to-apply test for the hypothesis which can be employed in an empirical analysis.

The literature predicts a paradoxical effect on time perception under the influence of positive emotion and high cognitive load in the retrospective paradigm. High cognitive load is expected to increase time perception, whereas positive emotion is expected to decrease time perception. A quasi-experimental within-subjects design was devised that manipulated emotion on two levels (positive and neutral) as well as cognitive load on two levels (high and low) to investigate the effect on time perception. The findings of the study prove disappointing with no main effects witnessed along any of the four experimental conditions. Participants overestimated all the durations, but under the high cognitive load, positive emotion condition, the mean time perception scores where the closest to the chronological time. / Mini-dissertation (MA)--University of Pretoria, 2015. / Psychology / Unrestricted

<div>Compelled by converging research in the natural sciences suggesting the stratigraphic nature of time, I argue for a temporal approach to the venerable problem of synthesis in evolutionary theory. Geneticist and pioneer of the Modern Synthesis (MS), Theodosius Dobzhansky (1900-1975), constructed one of the most powerful synthesis arguments in the history of evolutionary biology in the classic “Nothing in Biology Makes Sense Except in the Light of Evolution” (1973). I argue that nothing in evolution makes sense except in the light of time, such that the problem of evolutionary time plays a powerful role in making sense of the conceptual architecture of the Extended Evolutionary Synthesis (EES). The EES offers a strong alternative to the temporal and causal idealizations operating at the hardened core of the MS. I create the philosophical concept of stratigraphic time to strengthen connections between the four problem agendas or “causal catchalls” structuring the new synthesis: (1) developmental plasticity, (2) developmental bias, (3) inclusive inheritance, and (4) niche construction (Laland 2015 et al.). The dissertation is driven by two critical arguments (Chapters 1-3) concerning the subordination of time to process, and two constructive arguments (Chapters 4 and 5) concerning the nature of evolutionary time, which together attest to the conceptual strength of a temporal approach to the multiplicity of evolutionary problems pursued by the EES, and especially the connections between them. </div><div><br></div><div>Chapter 1, “Embracing the Problematic Structure of the Extended Evolutionary Synthesis,” explicates and evaluates the core assumptions of the EES in contrast with those of the MS, which has served as the dominant conceptual framework for evolutionary science and theory since the early twentieth century. Chapter 2, “Deep Time: The Forgotten Frontier,” critically argues that evolutionary time has been subordinated to evolutionary process, that the problem of evolutionary time must be revived after its eclipse at the origin of evolutionary theory, especially due to Darwin’s unnecessarily strict commitments to gradualism, adaptationism, and to the preeminence of natural selection. Chapter 3, “The Chronometric Subordination of Time to Movement in Philosophy, Science, and Society,” critically argues that the subordination of evolutionary time to process is primed by the chronometrically facilitated subordination of time to movement, what mathematician, physicist, and philosopher of science Henri Poincaré (1854-1912) called an unconscious opportunism in philosophical and scientific thought. The constructive arguments unfolded in Chapter 4, “The Continuous Variation of Evolutionary Contingency,” and Chapter 5, “Stratigraphic Time: The Synthesis of Deep and Developmental Rhythms,” attempt to respect causal thinking while conceptualizing evolutionary processes not according to causal laws but rather according to passive and active temporal syntheses (or modes of repetition), effectively delimiting causal thinking to a provisional conceptualization. Stratigraphic time enables conceptualization of the multiplicity of evolutionary process, driven by a new concept of evolutionary contingency. I argue that the roles of chance and causation in the EES are strengthened by concepts of difference and repetition, akin to the conceptual roles played by arrows and cycles of time in the formation of geological and evolutionary thought. These critical and constructive arguments are guided by Gilles Deleuze’s philosophy of time, which he conceptualizes under the rubric of repetition. The three passive and active temporal syntheses, or modes of repetition, Deleuze creates to think the nature of repetition provide conceptual tools for evolutionary synthesis through stratigraphic time. </div><div><br></div>

No description available.