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Dissertationen zum Thema „Operations Function“
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Tatsch, Andrew R. „Artificial potential-function guidance for autonomous in-space operations“. [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013399.
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Subagyo, Toto Hardiyanto. „Quality management practices in the south east Asian airlines' operations function“. Thesis, Cranfield University, 2002. http://hdl.handle.net/1826/4148.
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Despite the recent Asian economics crisis (1997-1998), air traffic volumes in Asia-
Pacific will continue to grow over the next decade. As the market is becoming more
and more attractive, the competition amongst the airlines operating in the region has
challenged the Southeast Asian carriers. The demanded quality of product/service by
the customer has become a crucial issue.
The ability to provide quality products and services is increasingly becoming a key
determinant of an airline's business success. The quality of any organisation's
products and services is determined by the core business or operational processes that
create them. If the chain of processes is made effective and efficient, then the
resulting products and services will also be effective and efficient.
Airline business activities consist of sales and marketing, engineering and
maintenance, flight operations, and ground services. For the purpose of this study the
operations function, which consists of aircraft maintenance, flight operations and
ground services, becomes a focus, as it is the core activity of operational processes
that causes the success or failure of delivering quality products and services to the
customer.
The study was aimed at developing a model of quality management practices for the
operations function of the `developing' airlines of Southeast Asia. It was conducted
through extensive literature and field studies, based on the quality management
practices of certain airlines in Southeast Asia and Western Europe.
The study found that there were twelve critical success factors of quality practices in
the operations function, which should be managed differently depending on the
airlines' organisational contexts, in order to keep their operational effectiveness and
efficiency at the required level. The findings configured a model that provides
airlines' executives or managers with guidelines, which they can consult in their
decision-making process when conducting quality improvement for their organisation.
They may well be used by other airlines as well. The findings from the study also contribute to the knowledge of process quality, and
the applicability of the quality concept developed in the social and business
disciplines of airlines' operational organisation.
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Riaz, Muhammad. „Novel miniature microwave quasi-elliptical function bandpass filters with wideband harmonic suppression“. Thesis, London Metropolitan University, 2017. http://repository.londonmet.ac.uk/1262/.
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Filters are integral components in all wireless communication systems, and their function is to permit predefined band of frequencies into the system and reject all other signals. The ever-growing demand in the use of the radio frequency (RF) spectrum for new applications has resulted in the need for high performance microwave filters with strict requirements on both inband and out-of-band characteristics. High selectivity, high rejection, low loss and extremely wide spurious-free performance are required for both transmitter and receiver channels. In addition, these devices need to be highly compact, easy to integrate within transceivers and should be amenable to low cost manufacturing. High selectivity is essential to enable the guard band between adjacent channels to be reduced thus improving the efficiency of the RF spectrum and hence increasing the capacity of the system. A low insertion-loss, high return-loss and small group-delay in the passband are necessary to minimize signal degradation. A wide stopband is necessary to suppress spurious passbands outside the filter’s bandwidth that may allow spurious emissions from modulation process (harmonic, parasitic, intermodulation and frequency conversion products) and interfere with other systems. The EMC Directive 89/336/EEC mandates that all electronic equipment must comply with the applicable EN specification for EMI. This thesis presents the research work that has resulted in the development of innovative and compact microstrip bandpass filters that fulfil the above stringent requirements for wireless communication systems. In fact, the proposed highly compact planar microstrip filters provide an alternative solution for existing and next generation of wireless communications systems. In particular, the proposed filters exhibit a low-loss and quasi-elliptic function response that is normally only possible with filter designs using waveguides and high temperature superconductors. The selectivity of the filters has been improved by inserting a pair of transmission zeros between the passband edges, and implementing notched rejection bands in the filter’s frequency response to widen its stopband performance. The filter structures have been analysed theoretically and modelled by using Keysight Technologies’ Advanced Design System (ADS™) and Momentum® software. The dissertation is essentially composed of four main sections. In the first section, several compact and quasi-elliptic function bandpass filter structures are proposed and theoretically analysed. Selectivity and stopband performance of these filters is enhanced by loading the input and output feed-lines with inductive stubs that introduce transmission zeros at specified frequencies in the filter’s frequency response. This technique is shown to provide a sharp 3-dB roll-off and steep selectivity skirt with high out-of-band rejection over a wide frequency span. In addition, the 3-dB fractional bandwidth of the filters is shown to be controllable by manipulating the filter’s geometric parameters. Traditional microwave bandpass filters are designed using quarter-wavelength distributed transmission-line resonators that are either end-coupled or side-coupled. The sharpness of the filter response is determined by the number of resonators employed which degrades the filter’s passband loss performance. This results in a filter with a significantly larger footprint which precludes miniaturization. To circumvent these drawbacks the second section describes the development of a novel and compact wideband bandpass filter with the desired characteristics. The quasi-elliptic function filter comprises open-loop resonators that are coupled to each other using a stub loaded resonator. The proposed filter is shown to achieve a wideband 3-dB fractional bandwidth of 23% with much better loss performance, sharp skirt selectivity and very wide rejection bandwidth. The third section describes the investigation of novel ultra-wideband (UWB) microstrip bandpass filter designs. Parametric study enabled the optimization of the filter’s performance which was verified through practical measurements. The proposed filters meet the stringent characteristics required by modern communications systems, i.e. the filters are highly compact and miniature even when fabricated on a low dielectric constant substrate, possess a sharp quasi-elliptic function bandpass response with low passband insertion-loss, and ultra-wide stopband performance. With the rapid development of multi-band operation in modern and next generation wireless communication systems, there is a great demand for single frequency discriminating devices that can operate over multiple frequency bands to facilitate miniaturization. These multi-band bandpass filters need to be physically small, have low insertion-loss, high return-loss, and excellent selectivity. In the fourth section two miniature microstrip dual-band and triple-band bandpass filter designs are explored. A detailed parametric study was conducted to fully understand how the geometric parameters of the filters affected their performance. The optimized filters were fabricated and measured to validate their performance.
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Horton, Rachel Avery Wing Steve. „Malodor from industrial hog operations, stress, negative mood, and secretory immune function in nearby residents“. Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1370.
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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.Title from electronic title page (viewed Apr. 25, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Epidemiology." Discipline: Epidemiology; Department/School: Public Health.
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Duncan, Anthony Ray. „Probability of economic success for Netherlands dairy farmers moving operations to the United States“. Texas A&M University, 2004. http://hdl.handle.net/1969.1/1410.
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Dairy producers in the Netherlands are struggling to stay in business due to
increased environmental legislation, population density, intensity of farming systems,
costs of production and quota restrictions. One option available to Netherlands dairy
farmers is to liquidate the value of their assets, put the money into an international bank,
and buy an established dairy farm in the United States. The primary objective of this
research is to compare the economic viability of a Netherlands dairy farmer staying in
the Netherlands versus moving to the United States, assuming they will bring over all of
their equity to put towards the purchase of a U.S. farm.
The hypothesis that a Dutch dairy farmer would have a greater probability of
economic success by relocating to the U.S was tested using a whole farm simulation
model (FLIPSIM) to simulate the economic activity of a representative dairy farm in the
Netherlands and 23 representative U.S. dairy farms in the major dairy producing regions
over the 2002-2011 planning horizon. FLIPSIM generated an empirical probability
distribution for net present value to rank the representative farms using stochastic
efficiency with respect to a function (SERF) for risk neutral and risk averse decision
makers.
The FLIPSIM results showed that six of the twenty-three U.S. dairy farms would
give the Dutch farmer a 99% chance of economic success. The added risk on income in
the U.S. would result in these U.S. farms having a 1 to 99% chance of negative ending
cash reserves (ECR) and a 1 to 99% chance of negative net cash farm income (NCFI).
In a complete SERF analysis, seventeen of the twenty-three U.S. farms were preferred
over the Dutch farm. In conclusion, the research shows Dutch dairy farmers with
adequate equity would be financially better off by relocating to the U.S. if they desire to
continue dairying, rather than staying in the Netherlands.
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McGregor, Daniel. „On the Structure of Kronecker Function Rings and Their Generalizations“. The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523924670762482.
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Tim, Kay Lewis. „Child language, the emergence of vocal requests for absent objects as a function of preferred operations and“. Scholarly Commons, 1988. https://scholarlycommons.pacific.edu/uop_etds/2158.
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Intellectually normal young children learn to request absent but needed objects which they are able to name. The primary focus of my study of child language in context was to assess the motivational effect of operation or stimulus preference on Lhe rate of toy request acquisition and the formation of stimulus classes (stimulus equivalences) . Of 13 21- to 37- month-old day-care children screened for generalized request responses (novel requests) , 1 girl and 4 boys participated in the training program because they were unable to request. Two of 4 children who completed training showed some support for the effect of preference for two two-stimulus operations on request response acquisition. All 4 children emitted novel requests to generalization probes following request acquisition criterion for one most and one least preferred stimulus. Preference had no observable effect on generalization of requesting to untrained stimuli. Additionally, I assessed and compared the cognitive-linguistic and adaptive-social maturity of those 5 children who were unable and those 8 who were able to request during preliminary request screening.
The trained children tended to have a greater difference between their measured receptive and expressive language skills, and also they tended to have slightly lower scores on the Vineland Adaptive Behavior Scales: Communication, Daily Living Skills, Socialization, and Motor Skills Domains. I also tested the efficacy of a natural language paradigm using a distributed skills trial sequence with interspersed trials of known-items as an extension of Tidwell's (1986) matching-to-sample, errorless learning procedure. Four within-subject replications of successful operation, name, and request acquisition are reported across 8 operations in support of his response chain methodology. I suggest that a battery of most of the developmental measures and request screening and training procedures tested in my study might be used by behavioral interventionists to assess and remediate delayed and/or inappropriate requesting among young normally developing children in a day-care setting.
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Muniz, Luiz Fabiano de Oliveira. „Estratégia de operações: estudos de caso em revendas de gás LP em cidades do nordeste do Brasil“. Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/3778.
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Previous issue date: 2014-09-26One of the key factors for a successful resale of gas has, besides the relevant issues to any type of business it is maintaining a strategy aligned operations in which the Company Distributor maintains trade relations. Besides helping in the success of business strategies Distributor, resale becomes an agent of accomplishment and execution of the sale, despite its absolutely independent management. The goal of any organization, regardless of what it proposes to accomplish is to survive. But to enable such condition is very critical to have clearly defined what your positioning, as well as necessary for its operation presents a position to deliver the requirements sought by their customers attributes. In other words, this means that for an organization to be successful, it must, among other factors, the establishment of a goal to be achieved, the identification and understanding of the characteristics of competitors, differential required for operation and development of capabilities and new differential. This work aimed to study how dealers three gas companies, in northeastern Brazil, faithful to the same distributor develop their strategies and operations which the results obtained by them. To achieve this goal, first a literature able to support the development of a theoretical framework in order to develop a thorough knowledge of the subject studied and to establish a conceptual framework focused on field research, which was composed of studies was conducted case of exploratory and qualitative performed in each of the companies analyzed. After the description of the individual case studies, a cross was made of the results obtained, which were compared to identify similar characteristics and differences between companies. It was found that among the retailers studied, those with the highest level of integration with the distributor have trained to generate the expected results for its owners operating their function. In addition, issues such as defining strategic priorities, better level of service, investments and consistent development of decision areas become more favorable than that which does not share the same degree of integration.
Um dos fatores fundamentais para que uma revenda de gás tenha sucesso, além das questões pertinentes a qualquer tipo de negócio, é ela manter uma estratégia de operações alinhada à Companhia Distribuidora na qual mantem relações comerciais. Além de auxiliar no êxito das estratégias de negócio da Distribuidora, a revenda se torna um agente de realização e execução da venda, apesar de ter sua gestão absolutamente independente. O objetivo de qualquer organização, independente daquilo que se proponha realizar, é sobreviver. Porém, para que possa garantir essa condição, é fundamental ter muito claramente definido qual seu posicionamento, assim como os atributos necessários para que sua operação apresente condições de entregar os requisitos buscados por seus clientes. Em outras palavras, isso quer dizer que, para que uma organização seja bem sucedida é necessário, entre outros fatores, do estabelecimento de um objetivo a ser alcançado, da identificação e da compreensão das características dos concorrentes, dos diferenciais necessários para a operação e do desenvolvimento de capacitações e novos diferenciais. Este trabalho propôs-se a estudar o modo como três empresas revendedoras de gás, da região Nordeste do Brasil, fiéis ao mesmo distribuidor desenvolvem suas estratégias de operações e quais os resultados obtidos por meio delas. Para alcançar esse objetivo, primeiramente foi realizada uma pesquisa bibliográfica capaz de fundamentar a elaboração de um referencial teórico, com o intuito de desenvolver um conhecimento aprofundado sobre o tema estudado e de estabelecer uma estrutura conceitual voltada à pesquisa de campo, a qual foi composta por estudos de caso de caráter exploratório e qualitativo realizados em cada uma das empresas analisadas. Após a descrição dos estudos de caso individuais, foi feito um cruzamento dos resultados obtidos, os quais foram comparados a fim de identificar características similares e diferenças entre as empresas. Constatou-se que, entre as revendas estudadas, aquelas com o maior nível de integração com a distribuidora apresentam sua função operação capacitadas para gerar os resultados esperados por seus proprietários. Além disso, questões como definição das prioridades estratégicas, melhor nível de prestação de serviço, investimentos e desenvolvimento consistente de áreas de decisão se tornam mais favoráveis do que àquela que não compartilha do mesmo grau de integração.
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Crites, Stephen Lee. „Event-related brain potentials as a function of evaluative and nonevaluative judgment processes: a late positive brain potential that varies as a function of categorization rather than response operations /“. The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487856906257448.
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Gao, Meihui. „Models and Methods for Network Function Virtualization (NFV) Architectures“. Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0025/document.
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Avec la croissance exponentielle des demandes de service, les opérateurs ont déployé de nombreux équipements, et par conséquent, la gestion du réseau est devenue de plus en plus difficile et coûteuse. La virtualisation des fonctions réseau (NFV) a été proposée comme un nouveau paradigme pour réduire les coûts liés à l’acquisition et à la maintenance pour les réseaux de télécommunications. Dans ce travail de thèse, nous nous intéressons aux problèmes du chaînage des fonctions virtuelles (VNFs) qui combinent des décisions de localisation des VNFs et de routage des demandes. D'un point de vue d'optimisation, ce problème est une combinaison des problèmes de localisation (pour la partie d'installation des VNFs) et de conception de réseaux (pour la partie de routage). Ces deux problèmes ont été largement étudié dans la littérature. Cependant, leur combinaison représente des divers challenges en termes de modélisation et de résolution. Dans la première partie de cette thèse, nous considérons une version réaliste du problème du chaînage des VNFs (VNF-PR) afin de comprendre l'impact des différents aspects sur les coûts et les performances de gestion du réseau. Dans ce but, nous étendons le travail dans~\cite{Addis2015} en considérant des caractéristiques et des contraintes plus réalistes des infrastructures NFV et nous proposons un modèle de programmation linéaire et une heuristique mathématique pour le résoudre. Dans le but de mieux comprendre la structure du problème et ses propriétés, la deuxième partie de la thèse est orientée vers l'étude théorique du problème, où nous avons étudié une version compacte du problème du chaînage des VNFs. Nous fournissons des résultats sur la complexité de calcul sous divers cas de topologie et de capacité. Ensuite, nous proposons deux modèles et nous les testons sur un testbed avec plus de 100 instances différentes avec différents cas de capacité. Au final, nous abordons la scalabilité du problème en proposant des méthodes constructives et des méthodes heuristiques basées sur la programmation linéaire entière pour traiter efficacement des instances de taille grande (jusqu'à 60 nœuds et 1800 demandes). Nous montrons que les heuristiques proposées sont capables de résoudre efficacement des instances de taille moyenne (avec jusqu'à 30 nœuds et 1 000 demandes) de cas de capacité difficiles et de trouver de bonnes solutions pour les instances dures, où le modèle ne peut fournir aucune solution avec un temps de calcul limitéDue to the exponential growth of service demands, telecommunication networks are populated with a large and increasing variety of proprietary hardware appliances, and this leads to an increase in the cost and the complexity of the network management. To overcome this issue, the NFV paradigm is proposed, which allows dynamically allocating the Virtual Network Functions (VNFs) and therefore obtaining flexible network services provision, thus reducing the capital and operating costs. In this thesis, we focus on the VNF Placement and Routing (VNF-PR) problem, which aims to find the location of the VNFs to allocate optimally resources to serve the demands. From an optimization point of view, the problem can be modeled as the combination of a facility location problem (for the VNF location and server dimensioning) and a network design problem (for the demands routing). Both problems are widely studied in the literature, but their combination represents, to the best of our knowledge, a new challenge. We start working on a realistic VNF-PR problem to understand the impact of different policies on the overall network management cost and performance. To this end, we extend the work in [1] by considering more realistic features and constraints of NFV infrastructures and we propose a linear programming model and a math-heuristic to solve it. In order to better understand the problem structure and its properties, in the second part of our work, we focus on the theoretical study of the problem by extracting a simplified, yet significant variant. We provide results on the computational complexity under different graph topology and capacity cases. Then, we propose two mathematical programming formulations and we test them on a common testbed with more than 100 different test instances under different capacity settings. Finally, we address the scalability issue by proposing ILP-based constructive methods and heuristics to efficiently deal with large size instances (with up to 60 nodes and 1800 demands). We show that our proposed heuristics can efficiently solve medium size instances (with up to 30 nodes and 1000 demands) of challenging capacity cases and provide feasible solutions for large size instances of the most difficult capacity cases, for which the models cannot find any solution even with a significant computational time
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Schnell, Christian. „The boundary behavior of cohomology classes and singularities of normal functions“. Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1218036000.
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Shrivastava, Utkarsh. „Analytics for Novel Consumer Insights (A Three Essay Dissertation)“. Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7711.
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Both literature and practice have investigated how the vast amount of ever increasing customer information can inform marketing strategy and decision making. However, the customer data is often susceptible to modeling bias and misleading findings due to various factors including sample selection and unobservable variables. The available analytics toolkit has continued to develop but in the age of nearly perfect information, the customer decision making has also evolved. The dissertation addresses some of the challenges in deriving valid and useful consumer insights from customer data in the digital age. The first study addresses the limitations of traditional customer purchase measures to account of dynamic temporal variations in the customer purchase history. The study proposes a new approach for representation and summarization of customer purchases to improve promotion forecasts. The method also accounts for sample selection bias that arises due to biased selection of customers for the promotion. The second study investigates the impact of increasing internet penetration on the consumer choices and their response to marketing actions. Using the case study of physician’s drug prescribing, the study identifies how marketers can misallocate resources at the regional level by not accounting for variations in internet penetration. The third paper develops a data driven metric for measuring temporal variations in the brand loyalty. Using a network representation of brand and customer the study also investigates the spillover effects of manufacturer related information shocks on the brand’s loyalty.
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YE, Liu. „A simulation experimental study on the utility of pay changes“. Digital Commons @ Lingnan University, 2017. https://commons.ln.edu.hk/cds_etd/17.
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In this thesis, we conduct an experimental simulation of 131 students from a university in Hong Kong and investigate the relationship between pay changes and the perceived values (i.e., utility). Applying traditional psychophysical methods, we measure the utility of pay changes (i.e., pay raises and pay cuts) of different sizes by individual responses (i.e., happiness/unhappiness). Drawing on utility theory and expectancy theory, we examine the function that best fits this relationship by considering common function forms including linear, quadratic, logarithmic, and power functions. Using regression techniques, we find that a quadratic function best fits the data, and the utility function is concave in the pay change. When we examine the best form of utility functions for pay raises and pay cuts separately, we find that the utility of pay raises and that of pay cuts are best described by a quadratic function and a linear function, respectively. We further show that a single model involving all pay changes better describes the utility than two separate models for pay raises and pay cuts. In addition, our best-fit utility model reveals that a sufficiently small amount of pay increase may generate a negative value of utility, and we calculate the percentage of smallest meaningful pay increase that results in non-negative utility. We also discuss the theoretical contributions of our findings to the literature and their implications to practitioners.
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Garner, William Howard. „Iteration of the power operation“. Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941367.
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This thesis is an investigation of the sequence of functions defined by fl (x) -xand fn+1 (x) -x , where the power is the principal value.In the case where the sequence is restricted to positive real this sequence of functions over thecomplex plane, we attack real numbers, the problem yields to the methods of analysis and we prove the behavior of the sequence.The more general problem of describing the behavior of both analytically and numerically. Though no full rigorous solution is given, the results presented suggest the behavior of the sequence over the complex plane is very interesting.Department of Mathematical Sciences
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Özçag, Emin. „Operations on generalized functions“. Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/34559.
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In Chapter 1, we give some properties distributions and introduce the notions of neutrix and neutrix limit with examples, in order to study the problem of defining the convolution product and the product of distributions. The problem of defining the distribution such that the ordinary derivative formula is satisfied for all and s = 0,1,2,... is studied in Chapter 2. In Chapter 3, we define the Beta function Bp,q (,) using the neutrix limit and prove that this neutrix limit exists for all . In Chapter 4 we let f and g be distributions and let fn(x) = f(x)Tn(x), where Tn(x) is a certain function which converges to the identity function as n tends to infinity. We then define the neutrix convolution product fg as the neutrix limit of the sequence {fn * g}, provided the limit h exists in the sense that N - limn fn * g,? = h, for all in D. The neutrix convolution products In are evaluated, from which other neutrix convolution products are deduced. The neutrix convolution product of distributions in Chapter 4 is not commutative. Therefore, in Chapter 5, we consider the commutative neutrix convolution product of distributions, *, and also evaluate the neutrix convolution product. The problem of defining the product of ultradistributions is considered in Chapter 6, and the neutrix product (Ff) (Fg) in Z', where F denotes the Fourier transform, is defined as the neutrix limit of {F(fTn).F(gTn). Later, we prove that the exchange formula holds. We finally define the neutrix product F(f)0G(g) of F(f) and G(g), where F and G are distributions and f and g are locally summable functions. It is proved that if f is infinitely differentiable function with f'(x) 0 and if the neutrix product F o G exists and equals H, then the neutrix product F(f) o G(f) exists and equals H(f). We also give an alternative approach to the form F(f(x)) in D', where F and f are distributions.
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Hansson, Christopher, und Pejman Shahmohammadian. „Komponentavskrivning utifrån två perspektiv i ett petrokemiskt företag“. Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17883.
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Komponentavskrivning blev aktuellt i samband med att EU valde att följa de standarder som IASB utfärdade. Efter införandet av K3-regelverk för svenska företag kom det att bli ännu mer aktuellt med komponentavskrivning i Sverige.Då tidigare forskning har riktat kritik mot komponentavskrivning, fann vi det intressant att undersöka vilka svårigheter som kan finnas med komponentavskrivning i ett petrokemiskt företag utifrån två olika perspektiv. Med detta som grund valde vi att undersöka vilka svårigheter som fanns utifrån ett redovisningsperspektiv och ett operativt perspektiv samt att undersöka hur interaktionen går till mellan dessa två perspektiv.Den teoretiska referensramen i arbetet innefattar svensk praxis, IAS 16, K3-regelverk, komponentavskrivning, kritik mot komponentavskrivning, redovisningsfunktionen och operativa verksamheten. Empirin utgörs av intervjuer som är utförda hos det petrokemiska företaget Borealis där vi har undersökt vilka svårigheter som finns med komponentavskrivning i redovisningsfunktionen samt den operativa verksamheten. Vi har även undersökt hur interaktionen gällande komponentavskrivning ser ut mellan redovisningsfunktionen och den operativa verksamheten. För att få bra fakta har vi valt att utföra flertalet djupintervjuer som har lagt grund till ett tillförlitligt empiriskt material.I analysen bearbetar vi den empiri och teori som har samlats in under studien för att få ett underlag för slutsatser baserat på problemformuleringen. Här sätts bland annat empirin i kontrast mot den teori som samlats in från tidigare forskning.Slutsatserna indikerar att det finns problem med komponentavskrivning ur både ett redovisningsmässigt och operativt perspektiv. Ur ett redovisningsmässigt perspektiv finns tydliga punkter som pekar på ökad dokumenthantering, svårigheter med att fördela kostnader till komponenter och att motivationsproblem hos anställda existerar. Ur ett operativt perspektiv har vi funnit svårigheter i form av arbetsbördan med anläggningsregistret, omdömet hos personal, ej homogena beslut kring vad som är en komponent och att det saknas kunskap hos den operativa avdelningen kring komponentavskrivning. Vidare menar vi att interaktionen mellan avdelningarna gällande komponentavskrivning kan brista men att det behövs ett fortsatt starkt samarbete samt en god kommunikation för att uppnå målen med komponentavskrivning.Program: Civilekonomprogrammet
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Sharif, H. „Algebraic functions, differentially algebraic power series and Hadamard operations“. Thesis, University of Kent, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235336.
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Gilgeous, V. G. „Functional objectives and acceptance in aggregate planning“. Thesis, University of Lincoln, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355852.
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Beaty, Von, Yonatan Berhane, Lei Chen, John C. Hunt und Lorn Reynolds. „Functional gap analysis of the Maritime Operations Centers“. Thesis, Monterey, California. Naval Postgraduate School, 2009. http://hdl.handle.net/10945/6944.
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The Maritime Operations Centers (MOC's) are an internal part of the Navy's Maritime Headquarters 9MHQ) concept for Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance (C4ISR) structure. The purpose of this study was to determine if the mission of the MOC could be accomplished with the existing C4I systems assigned. By tracing functions to systems, gaps were identified which created a foundation to investigate whether systems currently in development were available to meet theses gaps. In some cases, candidate C4I systems were proposed to fill gaps. System functionally overlap was also noted. As a by-product of our research into the MOC concept and analysis of it's required functions and candidate component systems, we have proposed a methodology for future work in the design of the MOC architecture. Through the use of requirements analysis tools, we have been able to structure the requirements, functions and proposed systems of the MOC architecture in a way that automated the tasks of functional analysis and system architecture design. Future work on the MOC requiremnts and architectures should utilize these or similar automation.
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WHITAKER, JASON MATTHEW. „Household Archaeology at Operation 11, Medicinal Trail Site“. University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1196213016.
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Crutchfield, Christopher Yale. „Security proofs for the MD6 hash function mode of operation“. Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44425.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.Includes bibliographical references (p. 79-82).
In recent years there have been a series of serious and alarming cryptanalytic attacks on several commonly-used hash functions, such as MD4, MD5, SHA-0, and SHA1 [13, 38]. These culminated with the celebrated work of Wang, Yin, and Yu from 2005, which demonstrated relatively efficient methods for finding collisions in the SHA-1 hash function [37]. Although there are several cryptographic hash functions - such as the SHA-2 family [28] - that have not yet succumbed to such attacks, the U.S. National Institute of Standards and Technology (NIST) put out a call in 2007 for candidate proposals for a new cryptographic hash function family, to be dubbed SHA-3 [29]. Hash functions are algorithms for converting an arbitrarily large input into a fixed-length message digest. They are typically composed of a compression function or block cipher that operate on fixed-length pieces of the input and a mode of operation that governs how apply the compression function or block cipher repeatedly on these pieces in order to allow for arbitrary-length inputs. Cryptographic hash functions are furthermore required to have several important and stringent security properties including (but not limited to) first-preimage resistance, second-preimage resistance, collision resistance, and for keyed hash functions, pseudorandomness. This work presents proofs of security for the mode of operation of the MD6 cryptographic hash function [32] - a candidate for the SHA-3 competition - which differs greatly from the modes of operation of many commonly-used hash functions today (MD4, MD5, as well as the SHA family of hash functions.) In particular, we demonstrate provably that the mode of operation used in MD6 preserves some cryptographic properties of the compression function - that is, assuming some ideal conditions about the compression function used, the overall MD6 hash function is secure as well.
by Christopher Yale Crutchfield.
S.M.
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Ljubo, Nedović. „Neki tipovi rastojanja i fazi mera sa primenom u obradi slika“. Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104792&source=NDLTD&language=en.
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Doktorska disertacija izučava primenu fazi operacija, prvenstveno agregacionih operatora na funkcije rastojanja i metrike. Originalan doprinos teze je u konstrukciji novih funkcija rastojanja i metrika primenom agregacionih operatora na neke polazne funkcije rastojanja i metrike. Za neke tipove agregacionih operatora i polaznih funkcija rastojanja i metrika su ispitane osobine ovako konstruisanih funkcija rastojanja i metrika. Za neke od njih su ispitane performanse pri primeni u segmentaciji slike „Fuzzy c-means“ algoritmom.This thesis studies application of fuzzy operations, especially aggregation operators, on distance functions and metrics. The contribution of the thesis is construction of new distance functions and metrics by application of aggregation operators on some basic distance functions and metrics. For some types of aggregation operators and basic distance functions and metrics, properties of distance functions and metrics constructed in this way are analyzed. For some of them, performances in application in Fuzzy c-means algorithm are analyzed.
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Dahan, Alexandre Jacob. „Operational functions for innovative startups in France“. reponame:Repositório Institucional do FGV, 2016. http://hdl.handle.net/10438/15955.
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This thesis will try to understand the importance of operational functions in French startups.A huge flexibility in tasks to be covered and a horizontal management characterize startups. Thus, it is very uncommon for newly created companies like startups to have a clear human resources management policy. Indeed, every partner or people in the startup may be brought to think about very large issues such as sales, business development, commercialization, marketing and technology or product development. This thesis will not scrutinize each task or the time spent at working in each of these tasks. It will rather look for the perception of the allocation preferences regarding each key function of the newly company. Whatever the sector in consideration or the startup stage of maturity, key functions that are perceived to make the startup successful are research & development and commercialisation. Managerial functions are not the most important ones. Technologyoriented startups consider the 'CEO function' as key whereas services startups do not put so much importance in it. Serial entrepreneurs might put more attention to marketing and fundraising functions rather than management function. Indeed, as experienced entrepreneurs, they also anticipate middle-term issues. Finally, entrepreneurs often have a bias regarding their academic background because they overestimate functions they think they can do compared to functions they are able to do. This thesis will try to show the link between operational functions exercised by a partner and the shares he owns in the startup. This link depends on the number of partners (known as shareholders), the type of partners (principal shareholders or secondary shareholders) and the impact of corporate governance regarding equity distribution. This work will lead to quantify and measure the importance of each basic function in newly created companies. In the end, it appears that partners’ responsibilities can explain equity distribution even if this criterion is not unique and sufficient enough. Indeed, functions’ importance is only one of the factors explaining equity distribution. Entrepreneurs perceive R&D and commercialization as Moreover, the thesis has also pointed out some limits (non-operational partners are neglected and assuming linearity of equity distribution based on functions’ respective weight might not be the best approach)
Nessa tese, é buscado um maior entendimento sobre a importância das funções operacionais nas startups francesas. Uma grande flexibilidade das tarefas a ser coberta e uma gestão horizontal caracterizam as startups. Desse jeito, não é muito comum para as empresas recentemente criadas como as startups ter uma politica clara de recursos humanos. Na verdade, cada participante na start-up pode ser levado a pensar de forma diferente em termos de vendas desenvolvimento de negócios, comercialização, marketing, tecnologia ou desenvolvimento de produto. Essa tese não vai explorar cada uma dessas tarefas. Mas vai procurar para identifcar a percepção sobre a alocação ótima de recursos para cada função chave da nova empresa. Qualquer seja o setor de mercado em consideração ou o estágio de amadurecimento da startup, funções chaves que são percebidas como sendo a base para start-ups bem sucedidas são pesquisa & desenvolvimento e comercialização. Funções de liderança não são tão importantes. Somente a startup focada na tecnologia tem uma 'função de chefe executivo' com maior importância do que as startups médias. Além disso, empreendedores em série, bem sucedidos ou não, focam predominantemente aspectos relacionados ao marketing e à captação de recursos em detrimento de aspectos ligados à gestão do negócio. No final, os empresários, muitas vezes tem um preconceito ao respeito da sua formação acadêmica porque ele sobrestimam funções que eles pensam poder fazer em comparação das funções que eles são capazes de fazer. Nessa tese, intent-se demonstrar a relação entre as funções ocupadas por um sócio e as ações que ele possui na startup. Essa relação depende do número de sócios (conhecido como acionistas), o tipo de sócios (acionistas principais ou acionistas segundarias) e o impacto na administração corporativa a respeito da distribuição do capital próprio.
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Lee, Jin Woo. „Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables“. University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086.
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Wang, Di. „Global operations networks : functional integration in global manufacturing industry“. Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608557.
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Pavlides, A. „Cost functions for railway operations and their application to timetable optimisation“. Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1553314/.
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This thesis investigates cost functions for evaluating and optimising the performance of a timetable with mixed train services. Specifically, the performance considered herein includes crowdedness, journey time, punctuality and waiting time. To examine the implications of optimising using these cost functions, a multi-objective optimisation algorithm is developed to derive an optimised timetable for mixed train services. The optimisation algorithm consists of three stages: a Genetic Algorithm (GA) is used to determine the optimal sequence of train runs, followed by Dijkstras shortest path algorithm for determining the optimal schedule based on the sequence determined by GA, and finally an iterative Hill-Climbing procedure for determining the optimal number of train runs in the system. Experiments were carried out on the Brighton Main Line and examined the effect of different timetabling parameters. The first series of experiments showed that the cost of the timetable can be driven down simply through resequencing the trains such that trains exiting the network quickly are more evenly distributed through the time period examined. This occurs since trains exiting early create a buffer which can absorb delays, preventing their propagation. The experiments have also shown that different demand levels influence the number of trains to be scheduled. The optimal number of trains to schedule though relies on the equilibrium between the crowdedness and punctuality cost function. Scheduling additional trains leads to a non-linear reduction in the marginal gains in terms of the crowdedness function while, on the other hand, the cost of punctuality increase exponentially. Finally, we derive the Pareto Frontiers for different combinations of cost functions. This research contributes to the state-of-art of railway system analysis and optimisation.
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Coco, Geoffrey P. „The virtual environment operating system : derivation, function, and form /“. Connect to this title online (PDF format) Connect to this title online (PostScript format), 1993. http://www.hitl.washington.edu/publications/th%2D93%2D1/th%2D93%2D1.ps.
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Ryoo, Ji Hoon. „Identities for the Multiple Polylogarithm Using the Shuffle Operation“. Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/RyooJH2001.pdf.
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Enazy, A. H. „the Islamic Development Bank: Its Origins, Purposes, Functions and Operations, 1975-83“. Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=108828.
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The study attempts to determine the extent which the financing activities of the Islamic Development Bank conform with the Is1amic principles of finance and banking, as expressed in the provisions of its charter. The analysis of these activities focuses on the modes of financing adopted by the lDB to promote social and economic progress in member countries in line with Islamic tenets. In order to present a sound analysis of the IDB's operations, the origins of these modes of financing are traced to the Islamic critique of the concept of riba or interest.L'étude tente de déterminer dans quelle mesure les activités financières de la Banque Islamique de Développement se conforment aux principes islamiques, énoncés par les dispositions de sa charte, qui régissent les systèmes financiers et banquiers. L'analyse de ces activités se concentre sur les méthodes financières adoptées par la BID pour promouvoir le progrès social et économique des états-membres conformément aux principes islamiques. Pour pouvoir présenter une analyse sérieuse des opérations de la BID, il est nécessaire de se référer à la définition islamique critique du concept de riba ou intérêt pour expliquer l'origine de ces méthodes financières.
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Simó, Pinatella David. „Instruments d’avaluació per tractar les conductes problemàtiques de persones amb discapacitat intel·lectual a partir del model E-M-I-R-C“. Doctoral thesis, Universitat Ramon Llull, 2013. http://hdl.handle.net/10803/119728.
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Les conductes problemàtiques que presenten les persones amb discapacitat intel•lectual són sovint complexes; donar-hi resposta esdevé un repte per als professionals i per als familiars. En les darreres dècades, un model que ha guiat les pràctiques d’avaluació i intervenció d’aquestes conductes ha estat el three term contingency (Cooper, Heron, i Heward, 2007). Aquest model emfatitza que les conductes problemàtiques estan influenciades per uns antecedents (estímuls discriminatius; ED) i reforçades per uns conseqüents. No obstant, recentment, Steege i Watson (2009) suggereixen el model E-M-I-R-C que incorpora l’existència d’una altra tipologia d’antecedents (operacions motivadores; OM) que influencien el three term contingency. Considerant la importància d’aquest nou model, aquest estudi pretén obtenir instruments d’avaluació que permetin la identificació de les OM i de la funció de la conducta i, alhora, explorar fins a quin punt les variables d’antecedents (ED i OM) poden actuar com a variables predictives de la funció de la conducta.
Per donar resposta a aquests objectius, s’ha adaptat i validat a la població espanyola el Questions About Behavioral Function (Matson i Vollmer, 1995) i el Contextual Assessment Inventory (McAtee, Carr, i Schreuder, 2004). En total s’han avaluat les conductes problemàtiques que presentaven 300 participants. Considerant que aquests instruments s’han de respondre pensant en una única conducta problemàtica, en total s’han avaluat 328 conductes. Així doncs, mitjançant les dades obtingudes en tots dos instruments, es va dur a terme una anàlisi de regressió múltiple per veure fins a quin punt les variables d’antecedents poden preveure la funció de la conducta avaluada.
D’acord amb els resultats obtinguts, l’estudi principalment conclou que (a) el model E-M-I-R-C té suport empíric ja que les variables d’antecedents no només estan relacionades amb la conducta, sinó també amb els conseqüents de la mateixa, i (b) l’adaptació dels instruments utilitzats s’adequa a la població espanyola i poden ser valuosos per als professionals en el moment de dissenyar programes d’intervenció.Las conductas problemáticas que presentan las personas con discapacidad intelectual son a menudo complejas; dar una respuesta ajustada resulta un reto para los profesionales y familiares. En las últimas décadas, un modelo que ha guiado las prácticas de evaluación e intervención de estas conductas ha sido el three term contingency (Cooper, Heron, y Heward, 2007). Este modelo enfatiza que las conductas problemáticas están influenciadas por unos antecedentes (estímulos discriminativos; ED) y reforzadas por unos consecuentes. No obstante, recientemente, Steege y Watson (2009) sugieren el modelo E-M-I-R-C que incorpora la existencia de otra tipología de antecedentes (operaciones motivadoras; OM) que influencian el three term contingency. Considerando la importancia de este nuevo modelo, este estudio pretende obtener instrumentos de evaluación que permitan la identificación de las OM y de la función de la conducta y, a su vez, explorar hasta qué punto las variables de antecedentes (ED y OM) pueden ser variables predictivas de la función de la conducta. Para dar respuesta a estos objetivos, se ha adaptado y validado a la población española el Questions About Behavioral Function (Matson y Vollmer, 1995) y el Contextual Assessment Inventory (McAtee, Carr, y Schreuder, 2004). En total se han evaluado las conductas problemáticas que presentaban 300 participantes. Considerando que estos instrumentos se deben contestar pensando en una única conducta problemática, en total se han evaluado 328 conductas. Mediante los datos obtenidos en los dos instrumentos, se llevó a cabo un análisis de regresión múltiple para ver hasta qué punto las variables de antecedentes pueden prever la función de la conducta evaluada. De acuerdo con los resultados obtenidos, el estudio principalmente concluye que (a) el modelo E-M-I-R-C tiene evidencia empírica puesto que las variables de antecedentes no sólo están relacionadas con la conducta sino también con los consecuentes de la misma, y (b) la adaptación de los instrumentos utilizados se adecúa a la población española y pueden ser valiosos para los profesionales en el momento de diseñar programas de intervención.
Problem behaviors displayed by people with intellectual disabilities are often complex; to successfully treat these behaviors become a challenge by professionals and families. In recent decades, a model used in the assessment and intervention process has been the three term contingency (Cooper, Heron, & Heward, 2007). This model emphasizes that problem behaviors are influenced by some antecedents (discriminative stimuli, SD) and reinforced by consequences. However, Steege and Watson (2009) have recently suggested the EMIRC model which incorporates the presence of another type of antecedents (motivating operations, MO) that influence the three term contingency. Considering the importance of this new model, this study aims to obtain assessment tools that permit the identification of the MO and behavioral function, and to explore whether antecedent (SD and MO) could predict behavioral function. Due to achieve these aims, the Questions About Behavioral Function (Matson & Vollmer, 1995) and the Contextual Assessment Inventory (McAtee, Carr, & Schreuder, 2004) have been adapted to Spanish population. Problem behavior of 300 participants was assessed. Having in mind that these instruments are to be answered thinking in one single behavior, a total of 328 problem behavior was assessed. A multiple regression analysis was conducted using data from the validated Spanish version of both instruments to explore whether antecedent variables could predict behavioral function. According to the results of this study, primary conclusions are (a) the E-M-I-R-C model has empirical support. Antecedent variables are related not only to the behavior but also to its reinforcers. And (b) the adaptation of the instruments to Spanish populations are valid to be used for practitioners when designing intervention plans.
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Yildirim, Hamdi Murat. „Algebraic Properties Of The Operations Used In Block Cipher Idea“. Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608289/index.pdf.
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In this thesis we obtain several interesting algebraic properties of the operations used in the block cipher IDEA which are important for cryptographic analyzes. We view each of these operations
as a function from $mathbb Z_{2}^n times mathbb Z_{2}^n to mathbb Z_{2}^n$. By fixing one of variables $v(z)=mathbf Z$ in $mathbb Z_{2}^n times mathbb Z_{2}^n$, we define functions $mathbf {f}_z$ and $mathbf {g}_z$ from $mathbb Z_{2}^n$ to $mathbb Z_{2}^n$ for the addition $BIGboxplus$ and the multiplication $BIGodot$ operations, respectively. We first show that the nonlinearity of
$mathbf {g}_z$ remains the same under some transformations of $z$. We give an upper bound for the nonlinearity of $mathbf {g}_{2^k}$, where $2leq k <n-1$. We list all linear relations which make the nonlinearity of $mathbf {f}_z$ and $mathbf {g}_z$ zero and furthermore, we present all linear relations for $mathbf {g}_z$ having a high probability. We use these linear relations to derive many more linear relations for 1-round IDEA. We also devise also a new algorithm to find a set of new linear relations for 1-round IDEA based on known linear relations. Moreover, we extend the largest known linear class of weak keys with cardinality $2^{23}$ to two classes with cardinality $2^{24}$ and $2^{27}$. Finally, we obtain several interesting properties of the set $ { ({mathbf X},{mathbf X} BIGoplus {mathbf A}) in mathbb Z_2^n times mathbb Z_2^n ,|, (mathbf {X}BJoin {mathbf Z})BIGoplus( ({mathbf X} BIGoplus {mathbf A} ) BJoin mathbf {Z} ) = {mathbf B} }$ for varying ${mathbf A}, {mathbf B}$ and ${mathbf Z}$ in $mathbb Z_2^n$, where $BJoin in { BIGodot,BIGboxplus }$. By using some of these properties, we present impossible differentials for 1-round IDEA and Pseudo-Hadamard Transform.
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Gabrielsson, Åsa. „Cross-functional co-operation and networking in industrial settings“. Doctoral thesis, KTH, Machine Design, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3325.
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The main process of this dissertation involves thedevelopment and refinement of a conceptual framework fordescribing and discussing cross-functional co-operation andnetworking within product realisation processes. The conceptualframework, the analysis of the case study and a discussion ofthe implications and challenges for research and industrialsector are the main results of the dissertation.
Industrial firms face different demands, which create anumber of potential sources of conflicts(fasterbettercheaper), for examplebetween market, product development and manufacturingfunctions. The transformation of industrial firms from beingtraditionally hierarchically organised to becoming team-,project- and process-based has delegated a number ofresponsibilities to employeesfor example, to interactwith others in planning and decision-making, and to act onissues or problems that may arise during daily work. Thissituation requires that new workand co-operation patterns aredeveloped between employees and between work units. Theestablishment of new co-operative behaviour seldom developswithout active support. Several studies confirm that there is aneed for organisational/managerial support for cross-functionalco-operation to develop, but that this type of support is oftenneglected (Blackler et al, 1997; Gabrielsson, 1998; Majchrzakand Wang, 1996).
The case study, reported in this dissertation, waslongitudinal and context-oriented. The study pointed out thatan integrative view of management on the entire ProductRealisation Process (PRP) was lacking during the first vitalphases of the organisational restructuring. However, itdeveloped continuously over time, which indicates a change inorganisational paradigm. Support for cross-functionalco-operation was considered and implemented only after thatco-operation had collapsed in a pilot group. The support was,for example, based onWork Reflection Seminars,which served as forums for discussing the new ways of working.In addition, two different parallel networks, originating fromthe previous organisational structure, had considerable impacton the development of cross-functional co-operation, whichdemonstrates the importance and power of practised rather thanformally ordered activities.
Keywords:Cross-functional Co-operation, Networking,Product Realisation Process, Concurrent Engineering, Productdevelopment, Production, Organisational Change, OrganisationalRestructuring.
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Keshwan, Abdulmohsin. „Utilising cross-functional teams to achieve marketing/operations integration for delivery priority“. Thesis, University of Salford, 2016. http://usir.salford.ac.uk/40450/.
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In today's manufacturing environment, due to the complexity of products, and the progress of technology, organisations are forced to be more responsive to the pressure of the dynamic market by developing, producing and delivering products quickly and before competitors (Bendoly et al., 2012; Gattiker, 2007). As a result, the integration between marketing and operations as core functions of a manufacturing organisation (Slack et al., 2013) has increasingly received attention from many academics and practitioners (e.g., Hausman et al., 2002; O’Leary-Kelly & Flores, 2002; Prabhaker, 2001; Swink & Song, 2007; Tang, 2010). This is because of the importance of the marketing and operations interface to achieve more rapid responsiveness to market demand through the fit between market requirements and operations capabilities (Slack et al., 2009). Despite the importance of this work, empirical research on how to achieve and develop this integration is still limited in comparison with conceptual work (Felekoglu et al., 2013; Paiva, 2010; Sharma, 2013; Song et al., 2010). Therefore, this study is an attempt to narrow this gap by investigating why and how to manage the marketing and operations functional relationship effectively in order to become more market oriented. The framework of this research consists of four phases namely; the needs (reasons for integration), the methods (cross-functional teams), the development (potential problems), and the achievement (delivery priority). This framework represents a strategic imperative for developing the delivery performance of an organisation based on the fit between strategy (time-based strategy), organisational structure (cross-functional integration), and environment (the competitive position) (Lenz, 1980; Miller, 1988). Empirically, due to the need to develop the performance of Iraqi public industry sector, two Iraqi public textile organisations were chosen as case studies to conduct this project by using semi-structured interviews and direct observation to gather data. According to the findings of this research, it can be argued that this study would be an approach to implement market orientation in the Iraqi context albeit one which is difficult to execute.
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Mukherjee, Bodhisattwa. „Reconfigurable multiprocessor operating system kernel for high performance computing“. Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/9120.
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Leslie, Rebekah. „A Functional Approach to Memory-Safe Operating Systems“. PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/499.
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Purely functional languages--with static type systems and dynamic memory management using garbage collection--are a known tool for helping programmers to reduce the number of memory errors in programs. By using such languages, we can establish correctness properties relating to memory-safety through our choice of implementation language alone. Unfortunately, the language characteristics that make purely functional languages safe also make them more difficult to apply in a low-level domain like operating systems construction. The low-level features that support the kinds of hardware manipulations required by operating systems are not typically available in memory-safe languages with garbage collection. Those that are provided may have the ability to violate memory- and type-safety, destroying the guarantees that motivate using such languages in the first place. This work demonstrates that it is possible to bridge the gap between the requirements of operating system implementations and the features of purely functional languages without sacrificing type- and memory-safety. In particular, we show that this can be achieved by isolating the potentially unsafe memory operations required by operating systems in an abstraction layer that is well integrated with a purely functional language. The salient features of this abstraction layer are that the operations it exposes are memory-safe and yet sufficiently expressive to support the implementation of realistic operating systems. The abstraction layer enables systems programmers to perform all of the low-level tasks necessary in an OS implementation, such as manipulating an MMU and executing user-level programs, without compromising the static memory-safety guarantees of programming in a purely functional language. A specific contribution of this work is an analysis of memory-safety for the abstraction layer by formalizing a meaning for memory-safety in the presence of virtual-memory using a novel application of noninterference security policies. In addition, we evaluate the expressiveness of the abstraction layer by implementing the L4 microkernel API, which has a flexible set of virtual memory management operations.
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Li, Jian-Cheng. „Generation of simulated ultrasound images using a Gaussian smoothing function“. Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179261418.
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Mills, John Barry. „The role of information technology in cross-functional integration“. Thesis, University of the West of England, Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283597.
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Fouche, Karel. „The status of the financial reporting function of co-operatives in South Africa“. Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/46219.
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The International Co-operative Alliance (ICA, 2013c:2) states that a co-operative
as business model has the ability to address unstable economic circumstances
for citizens around the world. The business model is inter alia focused upon the
well-being of the individual and bringing economic resources under democratic
control – it has been proved that the co-operatives sector has already provided
millions of jobs worldwide. The United Nations has also identified the potential of
co-operatives to play an important role in social and economic growth to such an
extent that they decided during 2009 to proclaim 2012 as the United Nations
International Year of Co-operatives.
The ICA (2013c:3) aims to provide co-operatives with direction for future growth
in its proposed Blueprint. The expansion of existing accounting practices of profitorientated
business is identified amongst other actions that should be taken to
ensure that co-operatives succeed in playing a significant role in economic, social
and environmental sustainability by 2020.
This study focuses upon the nature, status and accounting requirements of cooperatives
by means of a literature review. Existing financial reporting guidance
as well as research already performed for the development of financial reporting
guidance for co-operatives is also investigated, followed by the empirical portion of the research. Three South African co-operatives are investigated with
reference to their financial reporting requirements – the information is gathered
by means of semi-structured interviews which are held with stakeholders relevant
to the financial reporting function of co-operatives in South Africa.
The study concludes with a perspective on the relevance of existing financial
reporting frameworks of co-operatives and specifies the shortcomings thereof
with regard to the financial reporting requirements of co-operatives.Dissertation (MCom)--University of Pretoria, 2014.
tm2015
Business Management
MCom
Unrestricted
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Ho, Weng Kin. „Operational domain theory and topology of sequential functional languages“. Thesis, University of Birmingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435409.
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Gaffney, Christopher T. „The application of the inclusion-exclusion principle in learning monotone boolean functions“. abstract and full text PDF (free order & download UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1453632.
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Gharai, Fariba. „Generic principles of neighbourhood design, with particular reference to Tehran“. Thesis, University of Sheffield, 2000. http://etheses.whiterose.ac.uk/14786/.
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The main aim of this research is to develop a list of principles relevant to the design of neighbourhoods and in particular neighbourhood centres in Tehran. The study embodies two main phases, a literature review and a survey. During the literature review various dimensions of a neighbourhood centre are explored among both 'prescriptive' and 'explanatory' theories in architecture and urban design. Attempts are made to extract the essence and concepts of individual projects among the prescriptive resources, while the investigations of explanatory resources are focused on finding concepts and ideas which are applicable to design. The characteristics of neighbourhood centres are then classified into three categories called functional, perceptual and operational. These categories embody different sections which are separately studied among the literature and design principles are derived out of the writings and presented at the end of each section. Finally, a provisional list of principles is developed as the result of the literature review. The survey is designed to examine the above principles in the real world in two contrasting neighbourhood centres in Tehran. Face-to-face interviews with the residents of the neighbourhoods, together with the observation of cases, comprise the research instruments. The interviews are based on qualitative open-ended questions in order to find out the characteristics of the centres which the residents mostly appreciated or disliked. A checklist is formulated to explore design factors out of the survey responses. The design principles resulting from the survey are then compared with the initial list. The outcome of the research is the final list of generic principles which draws together the results of the literature investigation and the survey. These principles are primarily aimed at those directly engaged in the design of neighbourhood centres such as architects and urban designers. It also includes information for the management body of the centres. For the ease of users the principles are classified into ten sections under the three main categories mentioned above. Along with the above results, there are some secondary findings about the respondents' differences in perception and evaluation of their neighbourhood centre which are presented in the concluding chapter of the thesis. The study intends to decrease the gap between theoretical research and practical work by presenting design principles, extracted from the conceptual theories, that can be easily used by designers. Based on both theoretical and empirical approaches, it also helps to draw attention to the importance of neighbourhood centres in enhancing the quality of day-to-day lives of the city inhabitants.
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Kedbäck, Miranda. „Exploring Dynamic Complexity in the Symbiosis of Operations and Maintenance Functions : A Simulation-Based Optimisation Study“. Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15607.
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Maintenance, the process of preserving the condition of the equipment and performance in a production facility, stands for a considerable large cost in the budget of manufacturing organisations and is strongly affected by short-term philosophy. Therefore, both the long-term and short-term consequences of maintenance strategies need to be examined and analysed. The aim with this research is to investigate the dynamic complexity between the requirements from operations on the performance of maintenance, to illustrate the challenge of trading long-term and short-term requirements and benefits. These aspects have been studied through system dynamics (SD) modelling, simulation-based optimisation (SBO) and multi-objective optimisation (MOO). In order to illustrate the analysed problems, a state-of-the-art literature review has been created and two different scenarios have been evaluated. The scenarios are to investigate both the effects of more or less planned maintenance and the implication of a stock-and-flow structure for hiring and retirements of maintenance resources. A conceptual base model, created in previous research, has been applied and developed in order to meet the objectives. From the performed experiments, it can be confirmed that with the use of SD simulation trends and consequences over longer periods of time are truly visualised. In the first scenario, the results indicate that a short-term maintenance management strategy is unprofitable over time. The simulation also reveals that improvement strategies and proactive work can revolutionise capability and profit over time, even if these strategies initially generate a higher cost. In the second scenario, where the effects of a major retirement are visualised, the results confirm that the company needs to act proactively in order to avoid great financial losses. Employee and average skill losses cause long-term negative effects on the capability and availability. The optimisation that has been performed, with the hiring rate as the main variable and the objectives of maximising availability, minimising the direct cost and minimising the indirect cost, has generated feasible solutions on the Pareto front. In conclusion, the results from the experiments identify the behaviours and causal relationships in a maintenance system in symbiosis with operations. With the long-term goal of generating less reactive workload on the maintenance function, there are many benefits to obtain. The charted delays and causal relationships in the system indicate multi-level consequences, where a management approach should benefit financially from emphasising the importance of acting proactively and directing resources to improvement strategy work.
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Filko, Patrik. „Analogové funkční převodníky pro laboratorní výuku“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400536.
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This master’s thesis deals with the design and the realization of a laboratory teaching device, which includes two-port parts with nonlinear transmission characteristics corresponding to quadratic, inverse quadratic and cubic functions. It also includes a more complicated design of a polynomial function converter that offers students a practical view of functions mathematically designed while verifying their accuracy in laboratory exercises. The whole concept is supported by the design of the power supply circuit and the harmonic signal generator. The individual features of this project are feasible from components commercially available.
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DU, HONG-YI, und 杜宏毅. „Method to construct perfect hash function with deletion and conditional permutation operations“. Thesis, 1986. http://ndltd.ncl.edu.tw/handle/62399735107646558387.
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Wu, Huei Ching, und 吳惠卿. „A Study Integrating Quality Function Development and Source Management in Logistics Operations“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/87471155992011520626.
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碩士國立屏東科技大學
企業管理系所
95
There are over 100 cases of food poisoning each year in Taiwan. These incidents have caused damage to the economy and drawn wide public criticism. These food poisoning incidents are attributed to the lack of good food production process control and understanding customer needs。 The aim of this research is to apply Quality Function Development (QFD) techniques to Taiwan paddy rice and aquaculture as examples, to integrate and deploy customer needs and Hazard Analysis and Critical Control Point System (HACCP) regulations to design control processes and a monitoring system. The source management concept is adapted to correlate and define the critical factors in the initial stages that are helpful in establishing day-to-day operating standards. This study applies quality function deployment technology, source concept and agricultural product logistics management to evaluate the current management and control system. Customer needs are translated into process control in steps that can promote work team cooperation and communication. Finally, this study’s new model can be used to help improve the present agriculture control system and identify critical process factors to promote customer and agriculturist satisfaction.
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Jan, Jeng-Shiun, und 詹政勳. „A Low-Power and High-Performance Function Generator for Multiplier-Based Arithmetic Operations“. Thesis, 2002. http://ndltd.ncl.edu.tw/handle/76225160736151191197.
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碩士國立中山大學
資訊工程學系研究所
90
In this thesis, we develop an automatic hardware synthesizer for multiplier-based arithmetic functions such as parallel multipliers/multiplier-accumulator/inner-product calculator. The synthesizer is divided into two major phases. In the first phase called pre-layout netlist generation, the synthesizer generates the gate-level verilog codes and the corresponding test fixture file for pre-layout simulation. The second phase, called layout-generation, is to produce the CIF file of final physical layout based on the gate-level netlist generated in the first phase. The thesis focuses on the first phase. The irregular connection of the Wallace tree in the parallel multiplier is optimized in order to reduce the overall delay and power. In addition to the conventional 3:2 couter that is usually included in standard cell library, our synthesizer can select other different compression elements that are full-custom designed using pass-transistor logic. We also propose several methods to partition the final addition part of the parallel multiplier into several regions in order to further reduce the critical path delay and the area cost. Thus, our multiplier generator combines the advantages of three basic design approaches: high-level synthesis, cell-based design and full-custom design along with area and power optimization.
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Pei-Lan, Lin, und 林佩蘭. „Function-Based Cost Modeling for Wafer Manufacturing and Its Application to Operations Control“. Thesis, 1999. http://ndltd.ncl.edu.tw/handle/13647147059417119528.
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碩士國立臺灣大學
商學研究所
87
As the capital investment for wafer fabrication increases significantly, effective fab operation has become even more important than before. Although operational performance metrics such as cycle time, WIP and throughput are often used in evaluating the overall performance, another important performance metric, wafer manufacturing cost, is usually poorly quantified. In many practices, the manufacturing overhead is often allocated based on a pre-assigned accounting budget and the resulting manufacturing cost is empirically calculated. To eliminate the cost distortion problem, methods such as the activity-based costing (ABC) has been proposed as a better methodology. However, in an environment of rapid technology change, there is no standard method to define the "activity" in the ABC model and there is no effective tool for both accounting and manufacturing people to model the production process. In this thesis, a function-based cost modeling methodology is proposed. The goals of this thesis are three folds: * to model the functions of manufacturing process using IDEF0, * to design a function-based costing model, and * to apply the cost model to operations control. It is shown that the IDEF0 is an efficient tool for modeling manufacturing process and cost. By defining the functions of the wafer fabrication processes, we are able to calculate the manufacturing cost more easily and accurately than the current practices. The pie-chart and sensitivity analysis based on the cost model also provide managers important information for critical operations decision-making.
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Penfound, Bryan. „A study of the geometric and algebraic sewing operations“. 2010. http://hdl.handle.net/1993/4162.
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The sewing operation is an integral component of both Geometric Function Theory and Conformal Field Theory and in this thesis we explore the interplay between the two fields. We will first generalize Huang's Geometric Sewing Equation to the quasi-symmetric case. That is, given specific maps g(z) and f^{-1}(z), we show the existence of the sewing maps F_{1}(z) and F_{2}(z). Second, we display an algebraic procedure using convergent matrix operations showing that the coefficients of the Conformal Welding Theorem maps F(z) and G(z) are dependent on the coefficients of the map phi(z). We do this for both the analytic and quasi-symmetric cases, and it is done using a special block/vector decomposition of a matrix representation called the power matrix. Lastly, we provide a partial result: given specific maps g(z) and f^{-1}(z) with analytic extensions, as well as a particular analytic map phi(z), it is possible to provide a method of determining the coefficients of the complementary maps.
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Tzeng, Ruei-Fu, und 曾瑞賦. „Defect Inspection of Optical Masks by Using Radial Basis Function Neural Network with Image Operations“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/79643115123756708477.
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碩士明新科技大學
精密機電工程研究所
102
This research proposes self-learning methods to inspect defects of optical masks by using the radial basis function neural network with image operations. The research includes the automatic optical mask image alignment, neural network inspection methods, image processing, and system program development. In the automatic optical mask image alignment, the use high precision image measurement system (Nikon VMR-3020), and using centroid counterpoint to the four corners of the intersecting point of the optical mask image on the centroid, forming a central position, the optical mask image can be maintained to achieve consistency in the center of the image window capture, image processing to facilitate follow-up. In the aspect of neural network, the radial basis function neural network is an excellent feed-forward neural network. The research uses the neural network, because it can train in the classification with a high speed, better learning and approximate capacity. In the aspect of defect inspection, the image complexity of the background and noises of wafer surfaces and optical masks image can be reduced by image processing. Through calculating eight feature parameters for optical mask images, the feature parameters were also considered as the input parameters of the RBF neural network. Finally, the inspection systems of wafer surface and optical mask were successfully established and defects can be classified. Finally, the inspection systems of optical mask were successfully established and defects can be classified. Experimental results show that the developed method can successfully isolate and inspect the defects of optical masks.
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Paroda, Garcia Zeferino. „A modified augmented Lagrangian merit function, and Q-superlinear characterization results for primal-dual Quasi-Newton interior-point method for nonlinear programming“. Thesis, 1997. http://hdl.handle.net/1911/19195.
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Two classes of primal-dual interior-point methods for nonlinear programming are studied. The first class corresponds to a path-following Newton method formulated in terms of the nonnegative variables rather than all primal and dual variables. The centrality condition is a relaxation of the perturbed Karush-Kuhn-Tucker condition and primarily forces feasibility in the constraints. In order to globalize the method using a linesearch strategy, a modified augmented Lagrangian merit function is defined in terms of the centrality condition. The second class is the Quasi-Newton interior-point methods. In this class the well known Boggs-Tolle-Wang characterization of Q-superlinear convergence for Quasi-Newton method for equality constrained optimization is extended. Critical issues in this extension are; the choice of the centering parameter, the choice of the steplength parameter, and the choice of the primary variables.