O fenômeno de stick-slip, no processo de perfuração de poços de petróleo, é propiciado pela interação entre broca e formação rochosa e pode dar origem a grandes oscilações na velocidade angular podendo provocar danos irreparáveis ao processo. Neste trabalho, analisa-se o desempenho de leis de controle aplicadas à mesa rotativa (responsável por movimentar a coluna de perfuração), visando à redução de stick-slip e de oscilações da velocidade angular da broca. As leis de controle implementadas são do tipo PI (Proporcional-Integral), com parcelas de torque aplicado à mesa rotativa, proporcional e integral à velocidade da mesa, podendo ser com peso na broca constante ou variável. Para a coluna de perfuração, foi proposto um modelo em elementos finitos com função de forma linear. O torque na broca foi modelado segundo atrito de Coulomb pela forma não regularizada, curva esta ajustada pelos dados empíricos conforme propostas da literatura. Diversos critérios de desempenho foram analisados e foi observado que a minimização do desvio médio da velocidade angular em relação à referência propicia melhores condições de operação. Análises paramétricas dos ganhos de controle proporcional e integral foram realizadas, dando origem a curvas de nível para o desvio médio de velocidade angular na broca. A partir destas curvas, foram definidas regiões de estabilidade nas quais o desvio é aceitável. Estas regiões foram observadas serem maiores para menores pesos na broca e maiores velocidades angulares de referência e vice-versa. A adição do controle do peso na broca permitiu uma redução global dos níveis de desvio médio de velocidade angular, dando origem a um aumento das regiões de estabilidade do processo de perfuração. / The stick-slip phenomenon, in the process of drilling oil wells, due to the interaction between drill and rock formation can lead to large fluctuations in drill-bit angular velocity and, thus, cause irreparable damage to the process. In this work, the performance of control laws applied to the rotary table (responsible for moving the drill string) is analyzed, in order to reduce stick-slip and drill-bit angular velocity oscillations. The control laws implemented are based on a PI (Proportional-Integral) controller, for which the torque applied to the rotating table has components proportional and integral to table angular velocity with constant or variable WOB (Weight On Bit). For the drillstring, a finite element model with a linear interpolation was proposed. The torque on the drill-bit was modeled by a non-regularized Coulomb friction model, with parameters that were adjusted using empirical data proposed in literature. Several performance criteria were analyzed and it was observed that the minimization of the mean deviation of the drill-bit angular velocity relative to the target one would provide the best operating condition. Parametric analyses of proportional and integral control gains were performed, yielding level curves for the mean deviation of drill-bit angular velocity. From these curves, stability regions were defined in which the deviation is acceptable. These regions were observed to be wider for smaller values of WOB and higher values of target angular velocity and vice-versa. The inclusion of a controlled dynamic WOB reduced the levels of mean deviation of angular velocity, leading to improved stability regions for the drilling process.

Made available in DSpace on 2014-08-20T13:49:45Z (GMT). No. of bitstreams: 1 Dissertacao Carla Borges.pdf: 1434502 bytes, checksum: e5ef31456209efc8e42286773779c9bc (MD5) Previous issue date: 2012-03-30 / Job accidents in Brazil and in the world are one of the causes of sickness, limitations, disabilities and even death among workers. In the health area, studies are more focused on accidents in hospitals, although the Primary Attention to Health (APS) has about 1 million workers who act in environments with great risks of accidents due to the presence of chemical, physical and biological agents, besides the working itself being based on movement repetition, making it possible to potentiate its occurrence. It was aimed to identify the prevalence of job accidents among APS workers in 240 Basic Health Units of the Traditional and PSF attention models, in 41 cities with more the 100,000 inhabitants in the South and Northeast regions of Brazil. A cross-sectional study that used data from the Base Line Study of the Expansion and Consolidation Project of Family Health Strategy (ELB-PROESFUFPEL), performed in 2005. The adjusted analysis was performed with Poisson regression. The total sample was made of 4,741 workers. The prevalence of job accidents in APS was 34.8%. Among the accidents it stands out: with drill cutting material (62.4%), fall (36.1%), stroke (13.8%), shock (8.6%) and traffic accidents (23.0). In the adjusted analysis, the variables age, income, smoking, minor psychiatric disorders, work regime, occupation, adequacy, satisfaction with home assistance and team work were associated with the outcome. Characterize and register the occurrence of lifelong job accidents among APS workers, identifying the different occupational categories, the most exposed and other associated factors, can contribute to new security measures and resizing of workers health politics. / Os acidentes de trabalho no Brasil e no mundo são um dos causadores de adoecimento, limitações, incapacidades e até a morte entre trabalhadores. Na área da saúde os estudos enfocam mais os acidentes em âmbito hospitalar, embora a Atenção Primária à Saúde possua em torno de 01 milhão de trabalhadores, os quais atuam em ambientes com alto risco de acidentes devido à presença de agentes químicos, físicos e biológicos, além da forma de trabalho basear-se na repetição de movimentos podendo assim potencializar a sua ocorrência. Objetivou-se identificar a prevalência dos acidentes de trabalho ao longo da vida e fatores associados entre os trabalhadores da APS em 240 Unidades Básicas de Saúde dos modelos de atenção Tradicional e PSF, em 41 municípios com mais de 100 mil habitantes das regiões Sul e Nordeste do Brasil. Trata-se de um estudo transversal, o qual utilizou dados do Estudo de Linha de Base do Projeto de Expansão e Consolidação da Estratégia de Saúde da Família (ELB-PROESF-UFPEL), realizado em 2005. A análise ajustada foi realizada através da regressão de Poisson. O total da amostra foi de 4741 trabalhadores. A prevalência de acidentes de trabalho em APS foi de 34,8%. Entre os acidentes destacam-se: com material perfuro cortante (62,4%), queda (36,1%), pancada (13,8%), choque (8,6%) e acidentes de trânsito (23,0). Na análise ajustada, as variáveis idades, renda, tabagismo, transtornos psiquiátricos menores, regime de trabalho, ocupação, adequação de aspectos da tarefa, satisfação com atendimento domiciliar e trabalho em equipe mantiveram-se associadas ao desfecho. Caracterizar e registrar a ocorrência de acidentes de trabalho ao longo da vida dos trabalhadores em APS, identificando as diferentes categorias ocupacionais, os mais expostos e outros fatores associados, poderá contribuir para novas medidas de segurança e redimensionamento das políticas de saúde do trabalhador.

To analyse drill samples in a mine, a scanner that uses a gamma ray detector can be used. The scanner can analyse the drill sample to quickly see the elements present in the sample without destroying it. To improve the performance of the scanner, the electric signal from the detector needs to be less noisy, and different pulse shaping methods, filters and smoothers can be used on the sampled data to achieve an improved performance. In this master thesis, the electric noise model of the electronics around the detector was modeled, and analysed. Different pulse shaping method, filters and smoothers was also tested to see which method gave the best performance in FWHM sense. The Full Width at Half Maximum (FWHM) is the energy resolution of a detector, and is defined as the full width of a photopeak at the half maximum. The noise model of the schematic for the preamplifier was made by hand with support from MATLAB. The resulting noise model was compared between MATLAB and LTspice, and the conclusion is that the JFET is the main contributor of the significant noise, contributing to 98 % of the total noise at 10 GHz. The adopted filters and pulse shaping method are, matched filter, custom filter, CR-RC shaping, mean filter, median filter and clustering. The results from the tests indicated that custom filter with a FWHM of 1.96 keV and CR-RC with a FWHM of 1.67 keV shaping were more accurate than the matched filter with the FWHM of 5.1 keV. But the results also showed that it is important to take into account the waveform variance, due to inherent properties in the detector, with this consideration the FWHM of CR-RC shaper was improved from 2.29 keV to 1.67 keV. The clustering method was the most promising method but due to time constraints this method was never fully tested and no FWHM value was achieved.

This diploma thesis proposes the use of business intelligence working above complex economic system in a real joint-stock company for planning, cost management of cost centers and job orders and for control of managerial accounting in relation between cost centers and job orders. Furthermore thesis resolves the problems of data transition to the new information system to ensure the complexity of data entry to business intelligence.

Arbeten i slutna utrymmen är ett vanligt förekommande moment ombord på fartyg. Olyckor i samband med slutna utrymmen är tyvärr också vanligt förekommande. I många olycksfall så kan även de som ska hjälpa en nödställd i ett slutet utrymme drabbas av skador eller att dem i värsta fall mister livet. Detta resulterar i fler skadade eller omkomna än vad nödsituationen först hade. Den här studien har genom en kvalitativ forskningsmetod intervjuat sex respondenter med en semistrukturerad intervju. Respondenterna bestod av sjökaptensstudenter från Sjöbefälshögskolorna i Sverige. Arbetet undersökte hur övningarna ombord på fartygen förbereder besättningen på evakuering ur slutet utrymme. Studien fann att det upplevs övas för lite inom området slutna utrymmen och att osäkerheten kring situationerna som kan uppstå är hög. Många respondenter upplevde att man inte kunde rädda någon på en tillräckligt snabb tid och att evakueringar ur slutna utrymmen är ett väldigt svårt moment. Studiens resultat tyder på en kunskapsbrist inom situationerna kring evakuering ur slutet utrymme. / Work in enclosed spaces is a common occurrence on board ships. Unfortunately, accidents associated with confined spaces are also common. In many accidents, even those who intend to help a distressed person in an enclosed space can suffer injuries or in the worst case lose their lives. This results in more people injured or killed than the emergency first had. This study has through a qualitative reaserch method, interviwed six respondents with a semi-structured interview. The respondents consisted of naval officer students from the Swedish Naval Officer Universities in Sweden. The study investigated how the exercises aboard the ships prepare the crew for evacuation from enclosed spaces. The study found that in the respondent’s experience that it is practiced too seldomly and because of that it may arise some uncertainty in those situations. Many respondents felt that they could not save anyone in a fast enough time and that evacuations from confined spaces are a very difficult task.The study’s result indicates a lack of knowledge in the situation of evacuation from enclosed spaces.

Zielstellung: Die Ruptur des vorderen Kreuzbandes (VkB) ist die häufigste Ursache einer Lahmheit beim Hund. Im Gegensatz zu der Humanmedizin, wo die anatomische intraartikuläre Rekonstruktion des vorderen Kreuzbandes als Therapie der Wahl gilt, wird die intraartikuläre Rekonstruktion beim Hund nur selten durchgeführt und hat bis jetzt nicht dauerhaften Erfolg. Die anatomische Platzierung der Bohrkanäle ist bei Menschen für den Erfolg der Operation bei Menschen entscheidend. Erstes Ziel der Studie war die Bestimmung der radiologischen Lage des Zentrums des femoralen vorderen Kreuzbandursprungs beim Hund. Zweites Ziel war die Entwicklung und Erprobung eines Zielgerätes für die arthroskopisch-assistierte, anatomische vordere Kreuzbandrekonstruktion beim Hund. Material und Methode: A. Radiologische Studie: Die kraniale Begrenzung des femoralen Ursprungs des vorderen Kreuzbandes (VK) wurde mit einem röntgendichten Draht bei 49 Femora orthopädisch gesunder Hunde (KM > 20 kg) markiert. Anschließend wurde eine Computertomographie und 3D- Rekonstruktion jedes Femurs angerfertigt, anhand derer der Ursprung manuell segmentiert und das Zentrum berechnet wurde. Schließlich wurden, basierend auf den 3D-Modellen, virtuelle Röntgenbilder in zwei Ebenen berechnet. An diesen wurde die Position des berechneten Zentrums mit drei unterschiedlichen Methoden bestimmt (4x4-Gitterbox-Methode und prozentuale Position für die medio-laterale Projektion; Ziffernblattmethode für die disto-proximale Projektion). B. Zielgerät: Hintergliedmaßen (n = 12) von 6 Hundekadavern (KM ≥20 kg) wurden verwendet. Eine Gliedmaße jedes Kadavers wurde zufällig ausgewählt und die kaudo-kraniale Lage des Zentrums des vorderen Kreuzbandansatzes (vKBA) in medio-lateralen Röntgenbildern berechnet und anschließend auf ein justierbares Zielgerät übertragen. Unter arthroskopischer Kontrolle wurde das Zielgerät hinter der lateralen Kondyle eingehakt und ein Steinmann Pin von extra nach intraartikulär platziert. Die Position der resultierenden Bohrkanäle wurde sowohl röntgenologisch bestimmt als auch dreidimensional mit dem anatomischen Zentrum des vKBA der kontralateralen Hintergliedmaßen verglichen. Ergebnisse: A. Radiologische Studie: In der medio-lateralen Projektion befand sich das Zentrum des femoralen Kreuzbandursprungs im zweiten Rechteck von proximal in der kaudalen Spalte. Die mittlere prozentuale kaudo-kraniale und proximo-distale Position war 20,2 % (± 2,2), beziehungsweise 33,8% (± 3,7). Im disto-proximalen Röntgenbild lag in 97,6 % der Femora das Zentrum des femoralen Kreuzbandursprungs zwischen 14:00 und 15:00 Uhr. B. Zielgerät: In allen postoperativen Röntgenaufnahmen lagen die sechs Bohrkanäle im bzw. nahe dem Zentrum des vKBA. Die 3D- Messungen ergaben eine mediane Abweichung der Bohrkanalposition im Vergleich zum anatomischen Zentrum der kontralateralen Seite von 0,6 mm (Bereich:0,2– 0,9 mm). Schlussfolgerung: Die erarbeiteten Referenzwerte können für die Planung sowie die intra- und postoperative Kontrolle der femoralen Bohrung verwendet werden. Die Verwendung eines justierbaren Zielgerätes ermöglicht die präzise anatomische Platzierung des femoralen Bohrkanals für die intraartikuläre Rekonstruktion des vorderen Kreuzbandes. Die beschriebene Methode wird helfen, eine Fehlplatzierung des femoralen Bohrkanals im Zuge der intraartikulären vorderen Kreuzbandplastik zu reduzieren. In Kombination mit dem bereits beschriebenen tibialen Zielgerät sind nun die technischen Voraussetzungen für die arthroskopisch-assistierte anatomische vordere Kreuzbandplastik in der Tiermedizin gegeben. / Objective: Cranial cruciate ligament (CrCL) pathology is the most frequent cause of lameness in dogs. In contrast to human medicine, where anatomic reconstruction of the ACL is considered the treatment of choice, intra-articular repair in dogs is not commonly performed and until now has not met with enduring success. Accurate tunnel placement has been shown to be crucial in obtaining a successful outcome after anterior cruciate ligament reconstruction in humans. The first aim of our study was to define the radiographic location of the center of the femoral attachment of the CrCL in dogs, for the pre- operative planning as well as post-operative control of anatomical placement of the femoral tunnel. Second aim of the study was to develop and validate an aiming device for arthroscopic femoral tunnel placement. Materials and Methods: A. Radiographic study: Using femora from 49 adult, orthopedically sound dogs (BW ≥ 20 kg), a radiopaque marker was placed on the cranial border of the femoral footprint of the CrCL. Computed tomography and 3D reconstruction of each femur was performed subsequently, followed by manual segmentation of the footprint on the 3D models and calculation of its center. Finally, virtual digital radiographs in two planes were produced and the location of the calculated center of the CrCL was expressed using three different methods (4x4 box grid method and percentage position for the medio-lateral projection; o’clock position for the disto-proximal projection). B. Aiming device: Hindlimbs (n=12) of 6 cadaveric dogs weighing ≥20 kg were used. One hindlimb from each cadaver was randomly chosen and the caudo- cranial position of the CrCL center was calculated, on standard medio-lateral stifle radiographs, and transferred onto to an adjustable aiming device. During stifle arthroscopy the aiming device was inserted and guide pin placed from extra-to-intra-articular. The position of the resulting bone tunnel was evaluated on stifle radiographs and also compared with the anatomic center of each contralateral hindlimb, in the three dimensional (3D) space. Results: A. Radiographic study: In the medio-lateral radiographs the center of the femoral footprint was consistently located in the second rectangle from the top of the most caudal column of the 4x4 grid. The mean percentage caudo- cranial and proximo-distal location was 20.2% (± 2.2) and 33.8% (± 3.7), respectively. In the disto-proximal radiograph, the o’clock position of the CrCL center was between 2 and 3 o’clock in 97.6% of the femora. B. Aiming device: According to the postoperative radiographs, the location of all 6 intra-articular tunnel openings was consistent with the results of the radiographic study. In 3D space, arthroscopic femoral drilling resulted in a median deviation of the drill tunnels of 0.6 mm around the CrCL center. All tunnel openings were located within the CrCL insertion. Conclusions: The reported data can be used to plan and verify the placement of the femoral tunnel opening during intra-articular anatomic CrCL repair. The use of the aiming device suggests that arthroscopic femoral tunnel placement can be achieved with high precision. The measurement for the device can be derived from a standard medio-lateral radiograph of the stifle, which is part of the diagnostic work up of every dog with lameness localized in the stifle. The proposed technique may reduce femoral tunnel misplacement when performing intra-articular CrCL repair in dogs. In combination with the described technique for arthroscopic tibial tunnel drilling, arthroscopic assisted anatomic reconstruction of the CrCL in dogs can be achieved.

This thesis is focused on the problem of the determination of shear surfaces of slope instabilities (including fossil ones) from the results of the complex of logging methods. It describes the steps taken during data measurement, processing, and interpretation. All the data comes from the measurements conducted in the boreholes carried out for the geotechnical survey of the sliding area in the immediate proximity of the D8 highway or measurements in a well from the Děčín-Loubí locality. On the second mentioned locality, due to a different well construction, a more extensive logging complex could be carried out. After locating shear surfaces in a slope instability, a comparsion was made to determine whether the results in neighboring boreholes corresponded to each other, and to evaluate which methods (or combination of methods) suits best for the task.

No description available.

This project describes the role of ritual in the basic entrainment processes of Canadian soldiers. Building on the ecological systems theories of Urie Bronfenbrenner and Roy Rappaport, this project construes human adaptation to occur within multiple interdependent planes of ordered biological, sociostructural, psychosocial and symbolic (even transcendent) meanings and interactions within integrated social ecologies or “living systems.” Rappaport’s theory supports the argument that invariant, embodied actions and impulses not encoded by ritual performers establish social order, values, motivations, competencies, dispositions and representational or symbolic meanings—understood within this project as worldview—circulating within and regulating integrated human ecologies. Ordered sequences of invariant actions and impulses have also come to be conveyed within human phylogenic and ontogenetic developmental processes. This project specifically explores the hypothesis that embodied ritual dynamics pervade the basic entrainment rite of Canadian soldiers. The analysis draws on the ritual theory of Rappaport and the psychosocial developmental theory of Erik Erikson to describe the manner in which innate social regulating impulses and liturgically ordered ritual processes are exploited, in conjunction with predictable human psychosocial developmental imperatives, to build foundational martial dispositions, a spontaneous impulse to radical solidarity and a robust, homogeneous and multivocalic worldview in Canadian soldiers. Such a worldview is adaptive to all aspects of service within the Canadian Armed Forces. The rudimentary martial worldview inscribed upon recruit soldiers and officer candidates forms the foundational background to all subsequent martial meaning and adaptation in so far as it is collectively maintained throughout the military career. This argument maintains that a ritual analysis of adaptive meaning and solidarity among soldiers has profound implications for the structure and direction of future research investigating the persistent and well documented rates of distress, maladaptation and health pathology among serving members of the Canadian Armed Forces.

Text in English / This research focuses upon the killing on 16 August 2012, by the South African Police Service, of miners working in Marikana, in the North West Province, in their struggle for a just wage. This experience highlighted the ethical question of the relationship between the employee and the employer. This research investigates this question by reference to the evolution of the doctrine of the “just wage” and the “just price” in Western moral philosophy. The investigation shows that this Western doctrine is a significant basis for an ethical evaluation of the relationship between employee and the employer. However, the doctrine does require expansion by taking the woman as an indispensable factor in labour relations. Also, it requires deepening by engaging in dialogue with other philosophies of the world, in this particular case, the philosophy of Ubuntu. The dialogue with Ubuntu is justified by the fact that the majority of the miners, the actual diggers of the mineral wealth, are born into and nurtured through the philosophy of Ubuntu, even if some may have reservations about it. The dialogue reveals a specific philosophical issue, namely, a clash of the epistemological and moral paradigms. The Ubuntu epistemological-ethical maxim of feta kgomo o tshware motho (if and when one must choose between the continual accumulation of wealth and the preservation of human life then one ought to opt for the latter) is fundamentally at odds with capitalism, an economic system that elevates wealth and money to the status of a deity. A resolution of this conflict is an ethical imperative. / Philosophy, Practical and Systematic Theology / D. Litt. et Phil. (Philosophy)