Thesis (Ph. D.)--PQ# 3197319. / Includes bibliographical references.

This diploma thesis deals with dewatering technologies of fermentation residues from biogas plants and aims to design an integration of selected technology into the biogas plant. Fermentation residues (or digestate), which are a by-product of anaerobic biomass fermentation in biogas plants, contain a certain amount of nutrients and are usually used as agricultural fertilizers. However, the high-water content in digestate and the associated low nutrient concentration increase the cost of its storage and transport. Dewatering of fermented material could help reduce these costs. The main part of this work included the design of an integration of the selected dewatering technology into the biogas plant – its placement in a process, an addition of necessary appliances, the influence on material and energy flows. In this case, the fermentation residues are processed in two phases. First, a separation of the solid and the liquid fraction by a screw press. The second step is to thicken the liquid digestate by evaporation in a multistage evaporator. Evaluation of the design of a dewatering technology, including its impact on the economy of the biogas plant, is also part of the diploma thesis.

<p>In this thesis we present two new advancements in verified scientific computing using interval analysis:</p> <p>1. The Corner Taylor Form (CTF) interval extension. The CTF is the first interval extension for multivariate polynomials that guarantees smaller excess width than the natural extension on any input interval, large or small. To help with the proofs we introduce the concept of Posynomial Decomposition (PD). Using PD we develop simple and elegant proofs showing the CTF is isotonic and has quadratic or better (local) inclusion convergence order. We provide methods for computing the exact local order of convergence as well as the magnitude of excess width reduction the CTF produces over the natural extension.</p> <p>2. The Remainder Interval Newton (RIN) method. RIN methods use first order Taylor Models (instead of the mean value theorem) to linearize (systems of) equations. We show that this linearization has many advantages which make RIN methods significantly more efficient than conventional Interval Newton (IN). In particular, for single multivariate equations, we show that RIN requires only order of the square root as many solution regions as IN does for the same problem. Therefore, RIN realizes same order savings in both time and memory for a significant overall improvement.</p> <p>We also present a novel application of the two contributions to computer graphics: Beam Tracing Implicit Surfaces.</p>

The core motive of this research is to construct a new hierarchical non-DHT based architecture for Peer-to-Peer (P2P) networks that facilitate common interests clustering. DHT based network maintenance is on the high end and it churning management is a complex task here. Providing efficient data querying performance and ensuring minimal churn management effort has interested us to pursue non-DHT route of P2P networking. And at each level of the proposed architecture hierarchy, existing networks are all structured and each such network has the diameter of 1 overlay hop. Such low diameters have immense importance in designing very efficient data lookup algorithms. We shall use a mathematical model based on the Chinese Remainder Theorem (CRT), generally used in cryptography, to define the neighborhood relations among peers to obtain the above-mentioned diameters. To the best of our knowledge, use of CRT in P2P network design is a completely new idea; it does not exist in the literature so far. It is worth mentioning its most important advantage from the viewpoint of speed of communication, that is its diameter, which is only 3 overlay hops. The protocol is not restricted to a single data source, and it incorporates peer heterogeneity as well.

A well-known theorem in "Number Theory", the Chinese Remainder Theorem, was first utilized by Paul K. Lin in constructing confounding systems for mixed factorial experiments. This study extends the use of the theorem to cover cases when more than one component from some of the symmetrical factorials are confounded, and to include cases where the number of levels of factors are not all relative prime. The second part of this study concerns the randomized fractional replicates, a procedure which selects confounded subsets with pre-assigned probabilities. This procedure provides full information on a specific set of parameters of interest while making no assumption of zero nuisance parameters. Estimation procedures in general symmetrical as well as asymmetrical factorial systems are studied under a ”fully orthogonalized" model. The type-g estimator, investigated under the generalized inverse operator, and the class of linear estimators of parameters of interest and their variance-covariance matrices are given. The unbiasedness of these estimators can be obtained only under the condition that each subset of treatment combinations is selected with equal probability. This work is concluded with simulation studies to compare the classical and the randomization procedures. The results indicate that when information about the nuisance parameters is not available, randomization procedure guards against a bad choice of design. / Ph. D.

À partir de l’étude ethnographique de la maladie en milieu arakanais, cette thèse réfléchit sur le rapport individu-cosmos et sur le caractère pluriel, hybride et intégrateur de ce rapport. Une telle approche, innovatrice pour la Birmanie, s’éloigne de toute catégorisation et suggère en revanche que la médecine locale, la médecine d’origine occidentale, le bouddhisme Theravāda, l’astrologie, etc. forment un seul et même système de conceptualisation et de maîtrise de l’état de santé comme fruit du rapport au cosmos. La problématique développée s’appuie sur le postulat selon lequel la cohérence structurelle de l’ensemble – de son hybridité et de sa souplesse – réside dans le fait que les composantes sont liées entre elles par des rapports hiérarchiques et complémentaires. La hiérarchie, visible principalement dans l’hégémonie du référent bouddhique, est nuancée par le fait qu’aucune composante, y compris le bouddhisme, ne se suffit à elle même ; il y a toujours des restes qui échappent et qu’il revient à d’autres composantes de concevoir ou de gérer. Quant au caractère intégrateur du système, il est ici montré à travers l’exemple de la biomédecine dont l’intégration n’a été rendu possible qu’à travers de nécessaires adaptions du système lui-même. La thèse est organisée en cinq parties : la première est dédiée aux conceptions de la maladie ; la seconde partie est consacrée aux approches mises en œuvre par les villageois en vue de maintenir l’équilibre à tous les niveaux ; les troisième et quatrième parties portent sur la diversité des thérapeutes, de leurs formations et de leurs pratiques – aussi bien en termes de prévention que de soin – et de leur statut social ; la cinquième et dernière partie est quant à elle consacrée aux itinéraires multiples et complexes des malades. / Based on the author’s personal ethnographic research on sickness-related conceptions and practices in an Arakanese context, this thesis examines the relationship between the individual and the cosmos with particular emphasis on the plural, hybrid and integrating nature of such relationship.This approach, rejecting any form of categorisation, represents an innovation in the context of Burma and suggests that both Burmese and Western medicine, as well as Buddhism, astrology, spirit cult, etc. form a single system of conceptualisation and management of the state of health as a fruit of the relationship with the cosmos. The central point of this structure – its hybridity and plasticity – relies on the fact that the links between the various components are hierarchical and complementary. The hierarchy, notably the hegemony of Buddhism at various levels (conceptual, practical and of values) is counterbalanced by the fact that no component is enough to cope with all factors; there is always something missing, a remainder that other components can conceive and manage. The integrative nature of the system is showed through the example of western medicine, whose integration has produced some changes in the previous system.This thesis is structured in five parts : the first part is dedicated to sickness related conceptions, the second one to the practices the villagers rely upon in order to maintain the balance at all levels, while the third and the forth parts examine different kind of healers, their trainings, their (preventive and healing) practices and their social status; finally in the last one, health seeking behaviours of sick people are discussed.

Ανασκόπηση του κανόνα ολοκλήρωσης του gauss. Αναπαραστάσεις και εκτιμήσεις του υπολοίπου του. Τέλος περί της σύγκλισης του κανόνα ολοκλήρωσης. / A survey on gaussian quqdrature rules. Representation and estimates of its remainder. And about its convergence.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This research work was accomplished at a Mixed Rainy Forest in advanced stage of natural regeneration and that had as objectives: to describe the original vegetation of the place about to the floristic and structure; to compare the original vegetation, after-cut and current submitted to different intensities of intervention; to quantify the mortality of the remaining trees passed five years of the intervention; to evaluate the ingression of new individuals in the adult vegetation, as well as the growth of the remaining species; to characterize the natural regeneration of the palce and to compare the variable analyzed between the different treatments. The works had been carried through in Fazenda Tupi, property of Grupo VIPAL S/A, in the city of Nova Prata - RS. The treatments consisted in interventions of management of different intensities in the forest, five years before the current measurement, interventions which had accomplished and detailed by Borsoi (2004). The results gotten in the current inventory (in such a way of the adult vegetation as of natural regeneration) had been compared with the results of the inventory of the original vegetation and the remaining vegetation soon after the application of the treatments. The biggest alterations after-cut in the structure of the forest, mainly the reduction of the density and the basal area and volume of the vegetation had occurred in palces where the interventions had been more intense. Five years after the interventions the forest shows signals of that it is if organizing, however not yet reached the level of the original vegetation, as much in density how much in volume. The floristic diversity was bigger in the current vegetation of what in the original. The hardly opening of the canopy made possible a bigger number of ingression of individuals and species in the adult vegetation. The natural regeneration of the current vegetation was presented much more dense than the original vegetation. For a better understanding of the dynamics of the vegetation and the factors that influence in the development and recovery of it after the human interventions, continuous measuring of this area are demanded to it, relating the results with ambient factors and of ground. / O presente estudo foi realizado em uma Floresta Ombrófila Mista, em estágio avançado de regeneração natural, e teve como objetivos específicos: descrever a vegetação original quanto à florística e estrutura; comparar a vegetação original, pós-corte e atual sob diferentes intensidades de intervenção; quantificar a mortalidade das árvores remanescentes passados cinco anos da intervenção; avaliar o ingresso de novos indivíduos no povoamento, bem como o crescimento das espécies remanescentes; caracterizar a regeneração natural da área e comparar as variáveis analisadas entre os diferentes tratamentos. Os trabalhos foram realizados na Fazenda Tupi, propriedade do Grupo VIPAL S/A, no município de Nova Prata, RS. Os tratamentos consistiram em intervenções de manejo de diferentes intensidades na floresta, cinco anos antes da atual remedição, intervenções estas realizadas e detalhadas por Borsoi (2004). Os resultados obtidos no inventário atual (tanto da vegetação adulta como da regeneração natural) foram comparados com os resultados do inventário da vegetação original e da vegetação remanescente logo após a aplicação dos tratamentos. As maiores alterações pós-corte na estrutura da floresta, principalmente a redução da densidade e da área basal e volume da vegetação ocorreram nos locais onde as intervenções foram mais intensas. Cinco anos após as intervenções, a floresta mostra sinais de que está se reestruturando, porém ainda não atingiu o nível da vegetação original, tanto em densidade como em volume. Quanto à diversidade florística, esta foi maior na vegetação atual do que na original. A maior abertura do dossel possibilitou um maior número de ingresso de indivíduos e espécies na vegetação adulta. A regeneração natural da vegetação atual apresentou-se muito mais densa se comparada à vegetação original. Para uma maior compreensão da dinâmica da vegetação e dos fatores que interferem no desenvolvimento e recuperação da mesma após ações antrópicas, torna-se necessária a remedição contínua desta área, relacionando os resultados com fatores ambientais e de solo.

碩士 / 國立雲林科技大學 / 資訊工程研究所 / 95 / IP traceback is a defense method to help a victim for identifying the sources of attacking traffic. In this paper, we propose an IP traceback method based on the Chinese Remainder Theorem to require routers mark packets probabilistically with partial path information during forwarding packets. Our method can interoperate seamlessly deployable. A victim does not need to maintain the network topology while it reconstructs attack paths. The simulation reveals that, in comparison with the previous works, our method uses fewer numbers of marked packets and less time to reconstruct the complete attack path.

碩士 / 國立中正大學 / 機械工程研究所 / 86 / The end mill is a general cutter at the working of surface finishing cutting. At finishing cutting the cutter loading is small, so for the surface roughness demand is high grade then the cutter performance. But the ball end mill is a arc cutter so that generate "scallop high" on tool path interval and feed direction generate "feed direction cutting remainder" because the ball end mill rotate and moving. it is main factor become surface roughness. 　　The "feed direction cutting remainder" is more complex then the "scallop high" at generate cause. And difficult to get the remainder high use geometrical analysis. This thesis we use "Z - map" method to simulation the cutting remainder at difference cutting condition. Use the "least square" to regress the "cutting remainder mathematics model" and use the model to decision feedrate at finishing cutting of difference cuitting condition. We can get a work of smooth surface and efficiency.l 　　The "static point" of ball end mill where cutting speed is very slowly. Almost haven''t cutting effect and tool wear easily. So it is necessary to modify the cutter shape of the ball end mill. There are "v - cut " and "fillet v - cut", that apply two difference kind ball end mill and each has advantage and defect. This thesis bring up another modify cutter shape to improve the defect of "v - cut", and to increase finishing of work piece and reduce tool wear.