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1
Aktas, Metin. "Lse And Mse Optimum Deconvolution". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605111/index.pdf.
Testo completoAbstract (sommario):
In this thesis, we considered the deconvolution problem when the channel is known a priori. LSE and MSE optimum solutions are investigated with deterministic and statistical approaches. We derived closed form LSE expressions and investigated the factors that affect the FIR inverse filters. It turns out that, minimum LSE can be obtained when the system zeros are distributed homogeneously on the z-plane. We proposed partition-based FIR-IIR inverse filters. The selection of FIR and IIR parts is based on partitioning the channel zeros into two regions and using the specified channel zeros to design the best delay FIR and all pole IIR inverse filters. Three methods for partitioning are presented, namely unit circle-based, ring-based and optimum-partitioning. It turns out that ring-based and optimum-partitioning FIR-IIR inverse filter performs better than the best delay FIR inverse filter for the same complexity by about 4-5 dB. For noisy observations, it is shown that, noise should also be considered in the delay selection and partitioning. We extended our results for the design of MSE optimum statistical inverse filters. It is shown that best delay FIR-IIR inverse filters are less sensitive to the estimation errors compared to the IIR Wiener filters and they perform better than the FIR Wiener filters. Furthermore, they are always causal and stable making them suitable for real-time implementations. When the statistical and deterministic filters are compared, it is shown that for low SNR statistical filters perform better by about 1-2 dB, while deterministic filters perform better by about 0.5-1 dB for high SNR
2
Shi, Yipin. "Study on Bivariate Normal Distribution". FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/745.
Testo completoAbstract (sommario):
Let (X, Y) be bivariate normal random vectors which represent the responses as a result of Treatment 1 and Treatment 2. The statistical inference about the bivariate normal distribution parameters involving missing data with both treatment samples is considered. Assuming the correlation coefficient ρ of the bivariate population is known, the MLE of population means and variance (ξ, η, and σ2) are obtained. Inferences about these parameters are presented. Procedures of constructing confidence interval for the difference of population means ξ – η and testing hypothesis about ξ – η are established. The performances of the new estimators and testing procedure are compared numerically with the method proposed in Looney and Jones (2003) on the basis of extensive Monte Carlo simulation. Simulation studies indicate that the testing power of the method proposed in this thesis study is higher.
3
Luo, Shihua. "Bayesian Estimation of Small Proportions Using Binomial Group Test". FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/744.
Testo completoAbstract (sommario):
Group testing has long been considered as a safe and sensible relative to one-at-a-time testing in applications where the prevalence rate p is small. In this thesis, we applied Bayes approach to estimate p using Beta-type prior distribution. First, we showed two Bayes estimators of p from prior on p derived from two different loss functions. Second, we presented two more Bayes estimators of p from prior on π according to two loss functions. We also displayed credible and HPD interval for p. In addition, we did intensive numerical studies. All results showed that the Bayes estimator was preferred over the usual maximum likelihood estimator (MLE) for small p. We also presented the optimal β for different p, m, and k.
4
Bingham, Nathanael G. "Passive Resistance of Abutments with MSE Wingwalls". BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3201.
Testo completoAbstract (sommario):
Large scale static lateral load tests were performed on a pile cap under varying sand backfill configurations: no backfill, full-width dense sand backfill, dense sand slip plane confined backfill, and two configurations of dense sand MSE wall confined backfills. Efforts were made to maintain the relative compaction of the backfills for each of the tests near the same value. The MSE wall panel arrangement was varied to determine the effect of different reinforcement configurations on the passive resistance and wall panel displacement. Passive force-displacement curves were generated from each test. It was found that the MSE design manual provided reasonable estimates of pullout resistance of bar mats in dense sand, and that the passive resistance of a soil backfill confined by MSE walls can be calculated with an increased friction angle using a log-spiral approach. Also, the amount the triaxial friction angle can be increased depends on how much the MSE wall panels displace outward. Correlations were developed between the pressure on the pile cap and that on the MSE wall panels near the pile cap. Generally, the pressure on the wall panels was less than 10% of that which was on the adjacent pile cap, and decreased as the distance from the pile cap increased. Finally, it was found that while limiting the backfill width decreases the ultimate passive resistance of the backfill, if the backfill is confined in a plane strain configuration the passive resistance per unit width is higher than that for an unconfined backfill.
5
Winkelmann, Thomas. "Bewegungs- und Mischverhalten hochviskoser Flüssigkeiten im Mehrschneckenextruder MSE /". Aachen : Shaker, 2001. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009548736&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Testo completo
6
Gusbar, Vincent F. "Prefabricated geosynthetic drains characterization and implementation in MSE structures /". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.44 Mb., p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1435833.
Testo completo
7
Schrader, Christian. "Untersuchungen von Hochfrequenzentladungen an mikrostrukturierten Elektrodensystemen (MSE) zur Oberflächenmodifikation". [S.l.] : [s.n.], 2006. http://www.digibib.tu-bs.de/?docid=00014525.
Testo completo
8
Ko, Jin-Seok. "Current profile measurements using MSE on Alcator C-Mod". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53273.
Testo completoAbstract (sommario):
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2009.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 319-325).
A Motional Stark Effect (MSE) diagnostic system has been installed on the Alcator C-Mod tokamak to measure the plasma internal magnetic pitch angle profile. The diagnostic utilizes polarization patterns from Doppler-shifted Balmer-alpha decay emission from an energetic neutral beam injected into a magnetically confined plasma. This dissertation consists of three parts: (1) the current status of the C-Mod MSE diagnostic which includes major upgrades in the hardware and calibration techniques; (2) the elimination of the spurious drift in the polarization measurements due to thermal-stress induced birefringence; and (3) the measurement of current density profiles in Lower Hybrid Current Drive (LHCD) experiments. The major hardware upgrades include replacement of photomultiplier tubes (PMT's) with avalanche photodiodes (APD's) which enhanced the quantum efficiency; installation of a wire-grid polarizer to verify small Faraday rotation in the diagnostic; installation of steep edge filters to minimize pollution by the thermal Balmer-alpha signals; rotation of the Diagnostic Neutral Beam (DNB) which significantly reduced the anomalous effect from the secondary beam neutrals during the beam-into-gas calibrations. The new calibration techniques include two plasma calibrations: plasma current sweeping and the plasma size sweeping whose feasibility was experimentally proven; and an absolute intensity calibration which measured the real optical throughput of the system. A large database study indicates the signal-to-background ratio larger than 100 is required to have the measurement uncertainty under 0.1 degrees.
(cont.) The spurious drift in the measurement has been identified as the thermals tress induced birefringence imposed on the in-vessel lenses. By modeling this effect as a single wave plate, an in-situ calibration method has been proposed and its feasibility was experimentally verified. Based on the experiments that characterized the thermal response of the system, a single-layer heat shield with gold plating and a lens holder which reduces the thermal conduction path to the lens have been designed and fabricated. A more rigorous model that includes an intrinsic phase shift by mirrors reveals the thermal phase shift can be greatly magnified by the intrinsic phase shift. The current density profiles from LHCD experiments have been obtained from the MSE data corrected by a baseline magnetic equilibrium whose internal profile is constrained by the sawtooth inversion radius. The resultant profiles successfully demonstrate several standard predictions of LHCD theory such as the dependence of efficiency on the parallel refractive index and the off-axis current drive.
by Jin-Seok Ko.
Ph.D.
9
Thompson, Robert Ashton. "Assessing Levels of Corrosion on Extracted MSE Wall Reinforcement". BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8408.
Testo completoAbstract (sommario):
The purpose of this study was to extract galvanized steel wire reinforcement coupons from mechanically stabilized earth (MSE) walls along I-15 and determine the rate of corrosion that has taken place since Phase I, which was conducted by Gerber and Billings (2010). The galvanized steel reinforcement analyzed in this study has been in place for 19 to 20 years at the time of extraction. A total of 85 coupons were extracted and laboratory analysis was performed to determine the thickness of remaining zinc galvanization on each coupon. Soil samples were obtained from each one-stage wall extraction location to determine moisture content for correlation with corrosion. After laboratory testing was performed, the measured zinc coating thickness was compared to that determined in Phase I. An average corrosion rate of approximately 0.032 oz/ft²/year has occurred since Phase I. According to the AASHTO (2017) design corrosion rate of 0.35 oz/ft²/year for the first two years and 0.09 oz/ft²/year until the depletion of the zinc, the zinc coating would have been completely depleted after 16 years. Based on the results of laboratory testing, the initial galvanization coating was likely greater than the specified thickness of 2.0 oz/ft² (86 μm). The zinc galvanization is corroding at a slower rate than the AASHTO design rate. The AASHTO design rate for depletion of zinc coating and subsequent corrosion of the steel reinforcement is conservative for the corrosion conditions present in the MSE wall reinforcement coupons tested. The integrity of the steel reinforcement that is currently in place is not likely to be compromised by corrosion.
10
Price, Jacob S. "Lateral Resistance of Piles Near Vertical MSE Abutment Walls". BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3744.
Testo completoAbstract (sommario):
Full scale lateral load tests were performed on five piles located at various distances behind MSE walls. Three of the five test piles were production piles used to support bridges, and the other two piles were located behind a MSE wing walls adjacent to the bridge abutment. The objective of the testing was to determine the effect of spacing from the wall on the lateral resistance of the piles and on the force resisted by the MSE reinforcement. Tentative curves have been developed showing p-multiplier vs. normalized spacing behind wall for a length to height ratio of 1.1 and 1.6. The data suggest that with a L/H ratio of 1.6, a p-multiplier of 1 can be used when the normalized distance from the back face of the MSE wall to the center of the pile is at least 3.8 pile diameters. When the L/H ratio decreases to 1.1 a p-multiplier of 1 can be used when the pile is at least 5.2 pile diameters behind the wall. A plot showing the induced load in the reinforcement as a function of distance from the pile has been developed. The data in the plot is normalized to the maximum lateral load and to the spacing from the wall to the pile. The best fit curve is capped at a normalized induced force of approximately 0.15. The data show that the induced force on the reinforcement when a lateral load is applied to the piles decreases exponentially as the normalized distance from the pile increases. The plot is limited to the conditions tested, i.e. for the reinforcement in the upper 6 ft. of the wall with L/H values ranging from 1.1 to 1.6.
11
Hatch, Cody. "Lateral Resistance of Piles Near Vertical MSE Abutment Walls". BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4328.
Testo completoAbstract (sommario):
A full scale MSE wall was constructed and piles were driven at various distances behind the wall. Lateral load testing was conducted and the performance of the pile, wall, and reinforcement were measured. The piles were 12.75 inch pipe piles, and the wall was reinforced with welded wire grid reinforcement. The objective of the testing was to characterize the relationship between the lateral pile resistance and the distance of the pile behind the back face of the MSE wall. Load-displacement curves are presented for the piles located behind the wall at 66 inches (5.3 diameters), 55 inches (4.3 diameters), 41 inches (3.2 diameters), and 24 inches (1.9 diameters). The lateral resistance of the piles decreases as the spacing behind the wall decreases. The results of the testing have been matched in LPILE using p-multipliers to reduce the lateral resistance. A curve has been developed showing the variation of p-multiplier with normalized pile spacing behind the wall, including data from previous studies. The curve suggests that a p-multiplier of 1 (no reduction in lateral resistance) can be used when the normalized distance from the back face of the wall to the center of the pile is at least 4 pile diameters. The p-multiplier decreases relatively linearly for smaller spacings.
12
Pond, Daniel T. "Alternative Steel Reinforcement in Mechanically Stabilized Earth (MSE) Walls". DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/2038.
Testo completoAbstract (sommario):
Mechanically Stabilize Earth (MSE) is a method in which soil tensile strength and shear resistance is increased by using reinforcement. The traditional forms of reinforcement include bars, galvanized strips, welded wire mats or steel grids, and geosynthetics.When steel is used as reinforcement in MSE walls, it gets corroded or decayed. Certain shapes of reinforcement will have less corrosion because less surface area is exposed. Pullout resistance is the ability to resist a tensile force. This can be affected by the design and shape of the steel. This study simulates different overburden depths or pressures for pullout resistance and evaluates standard corrosion rates.
13
Rahmeyer, Matthew J. "Developing More Efficient Mechanically Stabilized Earth (MSE) Wall Reinforcements". DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/4896.
Testo completoAbstract (sommario):
Creating a more efficient reinforcement for Mechanically Stabilized Earth (MSE) Walls is important because it will reduce the amount of material needed to construct MSE walls, and will reduce overall construction costs for companies and contractors.
This thesis explores four main geometries of metallic crimped and metallic crossbar type reinforcement constructed with both, smooth steel and #4 rebar steel. Metal round bar was chosen because, compared to metallic rectangular strip reinforcements, there is less surface area in contact with the soil which will then reduce the amount of corrosion loses. Throughout testing, it was found that crimped metal round bar was able to produce the required pullout resistance but created too much extensibility (the amount of length the crimps straightened). The reinforcement made with crossbars and metal round bar were found to produce the required amount of pullout resistance with little to no extensibility.
14
Mansour, Tony, e Majdi Murtaja. "Applied estimation theory on power cable as transmission line". Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-46583.
Testo completoAbstract (sommario):
This thesis presents how to estimate the length of a power cable using the MaximumLikelihood Estimate (MLE) technique by using Matlab. The model of the power cableis evaluated in the time domain with additive white Gaussian noise. The statistics havebeen used to evaluate the performance of the estimator, by repeating the experiment fora large number of samples where the random additive noise is generated for each sample.The estimated sample variance is compared to the theoretical Cramer Raw lower Bound(CRLB) for unbiased estimators. At the end of thesis, numerical results are presentedthat show when the resulting sample variance is close to the CRLB, and hence that theperformance of the estimator will be more accurate.
15
Wang, Zeyi. "Inference about Reliability Parameter with Underlying Gamma and Exponential Distribution". FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/475.
Testo completoAbstract (sommario):
The statistical inference about the reliability parameter R involving independent gamma stress and exponential strength is considered. Assuming the shape parameter of gamma is a known arbitrary real number and the scale parameters of gamma and exponential are unknown, the UMVUE and MLE of R are obtained. A pivot is proposed. Some inference about R derived from this pivot is presented. It will be shown that the pivot can be used for testing hypothesis and constructing condence interval. A procedure of constructing the condence interval for R is derived. The performances of the UMVUE and MLE are compared numerically based on extensive Monte Carlo simulation. Simulation studies indicate that the performance of the two estimators is about the same. The MLE is preferred because of the simplicity of its computation.
16
Lamboni, Matieyendou. "Analyse de sensibilité pour les modèles dynamiques utilisés en agronomie et environnement". AgroParisTech, 2009. http://www.theses.fr/2009AGPT0087.
Testo completo
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Munenura, Rosemary. "Financial exclusion and capital structures in the Zimbabwean MSE sector". Thesis, Heriot-Watt University, 2005. http://hdl.handle.net/10399/1103.
Testo completo
18
Jaensson, Stina. "Solid waste management implementation, an opportunity not to be wasted : Solid waste management in Babati, Tanzania". Thesis, Södertörn University College, School of Life Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-2432.
Testo completoAbstract (sommario):
The amount of waste is increasing in the world due to changed consumption patterns and increasing populations. This is a problem especially in poor countries where the ability to handle the waste is limited due to financial and management problems. The non-profit organization WASTE has developed an Integrated Sustainable Waste Management- concept (ISWM), trying to help cities with waste management. The concept focuses on cooperation and participation among stakeholders, and also introduction of micro-and small enterprises and community based organizations. The aim of this thesis is to give recommendations to Babati, a small town in the north of Tanzania, how to develop their waste management based on the concept of ISWM. A case study has been carried out in the town, founding out that the streets of the town is free from litter today but is facing big challenges in the future. The town has a growing population and is just about to change waste management system. The new system is not developed in cooperation with the stakeholders in the town, but rather an initiative from the authorities, which will make the system very fragile. However, it is not too late to take action for securing a successful implementation of the system. The authorities of Babati now have an opportunity to adjust the solid waste system before population and the mountain of waste gets out of control. The suggestions given to Babati are to have parallel systems of waste collecting; it will try to meet people’s different needs. Encourage people to make waste handling into a business is also essential, that will reduce the amount of waste and generate incomes at the same time. Finally and most important is to involve all stakeholders and listen to their needs. If the stakeholders are parts of the process and involved in decision making, it is much more likely that the system becomes sustainable and a success.
19
Tajhya, Dipesh. "CORROSION OF STEEL IN MSE WALLS DUE TO DEICERS AND BACKFILL AGGREGATES". OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2155.
Testo completoAbstract (sommario):
Mechanically Stabilized Earth (MSE) wall is a civil structure that has been used for various purposes e.g., supporting bridges, residential or commercial buildings, roadways, railroads etc. In general, MSE wall uses either metal strip, bar or geosynthetics materials as reinforcement. Roger et al. (2010) mentioned that an approximately 57% of the MSE wall constructed in U.S. utilize steel strips as the resources of reinforcement. The usage of metal steel strips is followed by usage of steel bar mats (24%) and geosynthetics grids (18%). Even though MSE walls are designed for a service life of 75 to 100 years, early complication has often been reported. Corrosion of the reinforced steel has been the major cause that afflicts the long-term performance of these walls. The deicing salts used on pavements to melt down snow is one of the major cause of corrosion of these reinforced steels. The aggressiveness of deicers in terms of corrosion of these reinforced steel is studied through the potentiodynamic polarization technique at various concentrations. This study aims to determine the corrosion behavior on galvanized steel and bare steel in presence of individual deicing salt or deicers e.g., sodium chloride, calcium chloride, magnesium chloride and potassium acetate at various (i.e., 0.25, 0.50 and 1.0 M) concentration. Subsequently, the surface morphology was analyzed by using Scanning Electron Microscopy (SEM) and the mineralogical composition was observed through X-Ray Diffraction (XRD). In addition, the corrosivity of two backfill aggregates, natural aggregate and recycled concrete aggregate, was compared. The result shows that the corrosion effect of deicers on reinforced steel depends on its chemical composition and concentration. The SEM imaging showed the presence of micro cracks on the surface of galvanized steel, resulting in pitting corrosion rather than general surficial corrosion. Comparing the corrosion rate of these deicers, the aggressiveness of these deicers on galvanized steel can be arranged in the following order: sodium chloride > calcium chloride > magnesium chloride > potassium acetate. Although sodium chloride was most aggressive for both the steel, the aggressiveness of these deicers on bare steel was different from that of galvanized steel and can be arranged in following order: sodium chloride > magnesium chloride > calcium chloride > potassium acetate. The pH and electrical resistivity of the natural and recycled aggregates were compared with standard provided by American Association of State Highway and Transportation Officials (AASHTO) and found to be non-corrosive. The corrosion rate of both the aggregates on galvanized and bare steel were inappreciable. While analyzing the corrosiveness of these two aggregates, recycled concrete aggregate was observed to be more aggressive than the natural aggregate.
20
Juin, Camille. "Extraction, identification et caractérisation pharmacologique de pigments de Porphyridium purpureum sur cellules de mélanome humain". Thesis, La Rochelle, 2015. http://www.theses.fr/2015LAROS018/document.
Testo completoAbstract (sommario):
20 000 Européens meurent chaque année du mélanome et le taux de mortalité ne cesse de s’accroître. Les cellules de mélanome se caractérisent principalement par la mutation des kinases RAS, B-RAF et RHO-B. Ces mutations leur confèrent une résistance aux agents chimiothérapeutiques. Un grand nombre de travaux a établi que les pigments d’algues présentent un intérêt majeur pour prévenir, diagnostiquer et traiter les cancers. L’objectif de ce travail de thèse est de réaliser un travail de recherche intégré pour identifier des pigments de microalgues pouvant présenter un intérêt pour le diagnostic ou le traitement des mélanomes et de caractériser leur activité pharmacologique. Notre choix s’est porté sur Porphyridium purpureum, une espèce qui contient des phycobiliprotéines, des caroténoïdes dont la zéaxanthine. Nous avons développé des procédés innovants pour l’extraction et l’identification des pigments de microalgues. Ce travail a permis de réaliser la première extraction de phycobiliprotéines assistée sous champ microondes ainsi que l’identification des pigments de microalgue par UPLC-MSE au sein d’un mélange complexe. De plus, nous avons montré l’activité pro-apoptotique de la zéaxanthine et la caractérisation de son mode d’action sur les cellules de mélanome humain A2058. L’IC50 obtenue pour ce pigment est inférieure à celle du cisplatine (agent chimiothérapeutique). Ces résultats montrent le fort potentiel de ce pigment pour le traitement du mélanome résistant à la chimiothérapie20 000 Europeans die from melanoma each year and this number is constantly increasing. Melanoma cells are mainly characterized by the mutation of the RAS, B-RAF and RHO-B kinases. Because of these mutations, the cells are resistant to chemotherapeutic agents. A lot of studies have established that the algae pigments are of major interest to prevent diagnose and treat cancers. The objective of this thesis is to undertake an integrated research work to identify microalgae pigments that may be relevant for the diagnosis or treatment of melanomas and to characterize their pharmacological activity. We selected Porphyridium purpureum, a species which contains phycobiliproteins, carotenoids including zeaxanthin. We developed innovative processes for the extraction and identification of microalgae pigments. This work resulted in the first extraction of phycobiliproteins under microwave-assisted irradiations, and the identification of microalgae pigments by UPLC-MSE within a complex mixture. Moreover, we demonstrated the proapoptotic activity of zeaxanthin and the characterization of its mode of action on A2058 human melanoma cells. The CI50 obtained for this pigment is lower than that of cisplatin (chemotherapeutic drug). These results show the great potential of this pigment for the treatment of melanoma which are resistant to chemotherapy
21
FEITOSA, Wallanberg Rafael Almeida. "Modelo de gestão integrada nos âmbitos da qualidade, meio ambiente e segurança voltado às micro e pequenas empresas do APL têxtil do agreste". Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18730.
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CAPES
Diante da constante mutabilidade do mercado, as empresas cada vez mais buscam adequar-se as demandas sociais, ambientais e de mercado, implementando em suas organizações diversos sistemas de gestão que venham a atender as suas necessidades. Dado este cenário, o presente trabalho tem por objetivo a elaboração de um modelo integrado de gestão voltado às micro e pequenas empresas do setor de confecção do arranjo produtivo local do agreste pernambucano (APL). A pesquisa busca relacionar modelos de gestão ambiental, de qualidade e de segurança em um único sistema de gestão integrado (SGI), sistema este sustido pelas normativas ISO 9001, ISO 14001 e OHSAS 18001, amparados também por outras normas ISO de apoio e algumas ferramentas de Gestão da Qualidade. Foi realizada uma revisão bibliográfica e um estudo de caso múltiplo aplicado em três organizações inseridas no referido APL. Esta pesquisa apresentou como resultado diversos pontos entre as normativas que facilitam o processo de integração das mesmas. A partir dos estudos de caso múltiplo, pode-se perceber que o porte empresarial não influenciou na obtenção de melhores resultados e desempenhos. Logo, o estudo aponta que a prática destes três pilares, por meio de um modelo integrado pode ser aplicada de forma eficiente e eficaz em empresas de menor porte, com fins de certificação ou não, possibilitando melhorias no processo produtivo.
Faced with the constant changeability of the market, companies increasingly seek to adjust to social, environmental and economic demands that are dominant, implementing in their organizations various management systems that perhaps will meet their own needs. Given this scenario, this work has the goal to develop a integrated management model aimed at local micro and small enterprise textile companies in rural Pernambuco (APL). This search seeks to relate models of environmental management, quality and security in a single integrated management system (IMS), a system sustained by the normative ISO 9001, ISO 14001 and OHSAS 18001, also supported by other ISO standard support, and some quality management tools. For the preparation of this research, we used literature based on theory, as well as a multiple case study applied in three textile companies in rural Pernambuco. This research presents as a result many points between the regulations that make it easy to integrate them. From this multiple case study, one can see that the business size does not influenced in getting better results and performances. Therefore, the study points out that the practice of these three pillars, through an integrated model can be applied efficiently and effectively in smaller companies with certification purposes or not, enabling improvements in the productive process.
22
Neumann, Christoph [Verfasser], Joachim [Akademischer Betreuer] Kunert e Christine [Gutachter] Müller. "MSE-optimale crossover designs / Christoph Neumann ; Gutachter: Christine Müller ; Betreuer: Joachim Kunert". Dortmund : Universitätsbibliothek Dortmund, 2017. http://d-nb.info/1137702044/34.
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Keighley, Thomas Christopher. "Ministry in Secular Employment (MSE) in the Church of England, 1960-2000". Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/ministry-in-secular-employment-mse-in-the-church-of-england-19602000(e18af4ea-fc13-40ba-9063-c0f6d06d7388).html.
Testo completoAbstract (sommario):
Introduction: The study was undertaken to examine two issues. The first was to determine the development track of Ministry in Secular Employment between 1960 and 2000 with associated strategy and policy intentions in the Church of England for ordained ministers. The second was to use the material collected to examine the ecclesiology and socio-cultural context that had underpinned the decisions about MSE. Methods: An archive was generated between 2005 and 2011 that identified materials across the research period that included interviews, memoirs, surveys and personal communications. Using narrative, contextual and grounded theology approaches, individual narratives of those in MSE were examined to illuminate both the nature of the role fulfilled and the institution in which it was based. A focus for this process was Castells’ notion of the ‘space of flows’, using it as a crystal to determine the relevance of the archive in studying the ecclesiology of the Church of England in that period. Results: The years 1960-1970 initiated a period of profound socio-cultural change. In this period also emerged MSE. Analysis of the process identified that the experimental start to the initiative had not been embedded into the structure and strategy of the church, while being well embedded into the culture and structures of the worlds in which the Ministers in Secular Employment lived and worked. The church adopted a homeostatic approach to this development characterised by dioceses and their bishops acting independently. MSE had not been explored for its potential in the field of mission or cultural integration of church and society. The church continues to understand its mission and purpose in terms of stipendiary parish priests to the exclusion of nearly all other options. Discussion: While MSE has not developed to the degree its early pioneers had hoped, it is still practised in church life and therefore has potential for the future. Further research in several related fields has been identified.
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Neumann, Christoph Verfasser], Joachim [Akademischer Betreuer] [Kunert e Christine [Gutachter] Müller. "MSE-optimale crossover designs / Christoph Neumann ; Gutachter: Christine Müller ; Betreuer: Joachim Kunert". Dortmund : Universitätsbibliothek Dortmund, 2017. http://d-nb.info/1137702044/34.
Testo completo
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Castellanos, Bernardo A. "Internal Design of Mechanically Stabilized Earth (MSE) Retaining Walls Using Crimped Bars". DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/580.
Testo completoAbstract (sommario):
Current design codes of Mechanically Stabilized Earth (MSE) Walls allow the use lower lateral earth pressure coefficient (K value) for designing geosynthetics walls than those used to design steel walls. The reason of this is because geosynthetics walls are less rigid permitting the wall to deform enough to work under active pressures instead of at rest pressures as in steel walls. A new concept of crimped steel bars was recently introduced. This new type of bar was tested for tension and pullout behavior. Results on tests made on crimped bars show that putting those crimps in the steel bar will give us a better pullout behavior and a more flexible tensile behavior. This new type of steel bar will behave more like geosynthetics, allowing the wall to deform sufficiently to reach the necessary deflection to reach the active condition. The use of steel by current design codes is pushing MSE walls to be designed with more steel than needed. Measurements of the force in different walls showed that the steel is not being used even close to the maximum stress allowed by the code which is 50%. The proposed design methodology using crimped bars will help us save around 52% of steel volume compared to the actual design procedures. This means a huge improvement in the usage of steel versus actual designs. This improvement is obtained because of the efficient behavior of rounded bars under corrosion and because of the flexibility in the bars obtained with the crimps that will allow us to reach the active condition.
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Campagnaro, Gabriele. "Corporate Strategies During an Economic Crisis : Cases of Micro and Small Italian Ceramic Enterprises". Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-43802.
Testo completoAbstract (sommario):
Extensive research has previously been conducted in the field of corporate strategies during economic crisis, analyzing different contexts and countries. Nevertheless, the main focus has always been on small and medium enterprises without considering the importance that micro enterprises have in the European business tradition. The research gap for this study has been identified concerning Italian micro and small enterprises which, despite the importance of these kinds of companies in the national scenario, have not been considered yet. A literature review on this area highlighted the status of the research within the field, identifying the research gap and the purpose of this dissertation. The purpose is to contribute the research by understanding which is the relationship between strategies and performance with special attention on micro and small enterprises, aiming to formulate a guideline that may be followed by other enterprises dealing with such situation. The study was performed through a qualitative investigation based on semi-structured interviews with twenty companies which are part of a ceramic district in the north-east of Italy. More in detail, fourteen of the respondents are owners or CEOs of companies that survived the crisis while six interviews have been held with former owners of enterprises that did not survive. The research strategy used is a multiple case study with inductive approach. The data shows how firms adopted different strategies to survive the crisis, highlighting a considerable difference between the enterprises that survived and the ones that did not. Moreover, a further difference can be identified between the companies that survived but have been able to grow during the economic crisis and the ones that experienced a stable performance or a fall. The findings of the study shows how a combination between product innovation, marketing, internationalization and an open flexible approach is what is needed in order to reach superior performance during a crisis, transforming a threat into opportunity. The role of the leader seems to be the boost of every enterprise defining the success of the business. However, it is still not clear how the personality of the entrepreneur is related to company’s performance, thus this area needs to be developed through further research.
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Hlabeli, Batloung. "The influence of mobile payments on the choices and functionings of Micro and Small Enterprise (MSE) entrepreneurs in Lesotho". Master's thesis, Faculty of Commerce, 2020. http://hdl.handle.net/11427/32680.
Testo completoAbstract (sommario):
Background: This study explores the significance of ICT on the capabilities of unbanked MSE entrepreneurs in Lesotho. MSE entrepreneurs are the primary source of income for their families, especially in the context of developing countries. Accordingly, MSEs are fundamental instruments for economic growth, poverty alleviation and source of employment in developing countries. Hence, the country that invests in this business sector is a step closer to accomplishing its MDGs. Purpose: The study explored and empirically assessed the influence of mobile payments among MSE entrepreneurs through a capabilities lens. Given that MSEs are crucial for developing countries, the targeted participants were MSE entrepreneurs from diverse trading industries in Lesotho. Research methodology: The methodology for this study was qualitative. Exploratory and descriptive research methods were used to evaluate the influence of mobile payments on the capabilities of MSE entrepreneurs. This study adopted Kleine's Choice Framework to explore and empirically assess the benefits of mobile payments among MSE entrepreneurs. Data was collected using semi-structured interviews and field notes and analysed using thematic analysis. Key Findings: The findings revealed the use of M-Pesa within the MSE sector enabled microentrepreneurs to accomplish their goals. The findings show that M-Pesa leads to the growth of MSEs. Therefore, entrepreneurs in the MSE business sector are capable of providing food, shelter and clothes for their families through income generated from their enterprises. Additionally, MSE entrepreneurs bank, transfer and receive money through accessible and available mobile payment platforms. However, these entrepreneurs face issues such as network failure, withdrawal amount limits and security risks while using mobile payments. Value of the study: The study contributes to the existing ICT4D and mobile payments literature in Lesotho by discussing the influence of mobile payment through the Choice Framework.
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Souza, Aparecido Ferreira de. "Estudo da utilização de heme por Paracoccidioides lutzii: análise do proteoma de parede celular após exposição à hemoglobina e expressão heteróloga de Pga7, um provável receptor de hemoglobina". Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/6911.
Testo completoAbstract (sommario):
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEG
Iron (Fe) is an indispensable metal for most biological systems and is a target of competition in host-pathogen interactions. In humans, most Fe is complexed to the cofactor heme, present in hemoglobin, a molecule that is exploited by pathogens as an iron source. Paracoccidioides spp., a complex of thermodymorphic pathogenic fungi, are the etiological agents of paracoccidioidomycosis (PCM), a systemic mycosis endemic in Latin America. Paracoccidioides spp. are able to use hemoglobin in a receptor(PbRbt5)-mediated process. However experimental evidence points to the existence of a complex system with the presence of other proteins. In the present work, we demonstrated the similarity between PAAG_02225 (PbPga7), from Paracoccidioides lutzii, and the sequence of the heme/hemoglobin receptor Pga7 from Candida albicans, and expressed PbPga7 in Escherichia coli. Due to the presence of rare codons in P. lutzii sequence, compared to the codons preferably used by Escherichia coli, chemical synthesis of the gene was employed. The expression of PbPga7 protein opens perspectives for PbPga7 characterization. In addition, nanoUPLC-MSE was employed to analyze P. lutzii cell wall proteome. We observed that the treatment of fungus with hemoglobin promotes induction of potential adhesins and defense-related enzymes against reactive oxygen species. These data indicate that these proteins may be important for the pathogen to access hemoglobin by adhering and lysing erythrocytes, besides counteracting the toxicity generated by heme/hemoglobin released from erythrocytes, allowing the uptake and use of these molecules. The results obtained in the present work reinforce the complexity of the interaction event between pathogen and host and, in addition, contribute to broaden the understanding of the biology of Paracoccidioides spp.
O Ferro (Fe) é um metal indispensável para a maioria dos sistemas biológicos e é alvo de competição em interações patógeno-hospedeiro. Em humanos, a maioria do Fe encontra-se complexada ao cofator heme, presente na hemoglobina, uma molécula que é explorada por patógenos como uma fonte de Fe. Paracoccidioides spp., um complexo de fungos patogênicos termodimórifocos, são agentes etiológicos da paracoccidioidomicose (PCM), uma micose sistêmica endêmica na América Latina. Paracoccidioides spp. é hábil em utilizar hemoglobina por um processo mediado por receptor (PbRbt5). Contudo, evidências experimentais apontam para a existência de um sistema complexo com a presença de outras proteínas. No presente trabalho, foi demonstrada a similaridade de PAAG_02225 (PbPga7), de Paracoccidioides lutzii, com a sequência do receptor de heme/hemoglobina Pga7 de Candida albicans. A expressão heteróloga de PbPga7 foi realizada em Escherichia coli. Devido a presença de códons raros na sequência de P. lutzii, comparados aos códons utilizados preferencialmente por E. coli, a síntese química do gene foi empregada. A expressão da proteína PbPga7 abre perspectivas para estudos de caracterização da mesma. Adicionalmente, nanoUPLC-MSE foi utilizada para analisar o proteoma de parede celular de P. lutzii. Observou-se que o tratamento do fungo com hemoglobina promove a regulação positiva de potenciais adesinas e enzimas relacionadas com a defesa contra espécies reativas de oxigênio. Estes dados indicam que estas proteínas podem ser importantes para que o patógeno possa acessar a hemoglobina, aderindo e lisando eritrócitos, além de contrapor a toxicidade gerada pelo heme/hemoglobina liberados, permitindo a captação e utilização dessas moléculas. Os resultados obtidos no presente trabalho reiteram a complexidade do evento de interação entre patógeno e hospedeiro e, adicionalmente, contribuem para a ampliação do entendimento da biologia de Paracoccidioides spp.
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Auluck, Janica. "Biomarkers for diagnosis and prognosis of heart failure using label free LC-MSE". Thesis, University of Leicester, 2014. http://hdl.handle.net/2381/39733.
Testo completoAbstract (sommario):
In the UK 900,000 people suffer from heart failure, of which 30-40% die within 1 year of diagnosis. Heart failure is a prevalent disease worldwide and is associated with high rates of morbidity and mortality. Current biomarkers suffer from poor levels of accuracy and efficacy. Therefore, accurate, reproducible, and reliable diagnostic and prognostic biomarkers are needed. In this study, we have chosen mass spectrometry based proteomics to profile patient plasma to discover diagnostic and prognostic biomarkers of heart failure. This experimental method allows simultaneous qualitative and quantitative analysis. Bioinformatic analysis of the protein profiles to detect protein changes has been undertaken to identify potential markers of disease. Upon method development, plasma protein profiles from one hundred acute heart failure patients were obtained using a Waters Synapt G2 QTOF mass spectrometer post plasma enrichment (ProteominerTM, Bio-Rad) and 2D-RP-RP fractionation. Samples were analysed using a HDLC-MSE experiment and run in triplicate. Statistical comparisons of the protein profiles were made using PLGS v2.5.2 and progenesis LC-MS to identify potential candidates for biomarkers. Using a label free 2D HDLC-MSE experiment we have found that differences in protein expression of acute heart failure patient profiles exist. Seven candidate proteins have been identified and are shown to be involved in many different physiological processes that play a role in the pathophysiology of heart failure. ELISA analysis of the seven identified markers has identified SAP as a strong predictor of adverse patient outcome in acute heart failure. Using multivariate analysis, SAP has been found to be an independent prognostic marker in acute heart failure patients. Further studies are needed to verify SAP as a biomarker in a larger patient cohort, and measure SAP alongside current prognostic markers. A mechanistic study to identify the role of SAP in heart failure pathology needs to be undertaken.
30
Muñante, Alejandra, Fabrizio Reyes, Fernando Sotelo e Carlos Raymundo. "Management model for pecan production using process tools in an MSE in Peru". Springer Verlag, 2020. http://hdl.handle.net/10757/656130.
Testo completoAbstract (sommario):
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.The following study proposes a production management process model based on good practices and developed with process management tools for increasing crop productivity of pecan nuts using the Ica region in the district of Pachacutec as a study area. The study covers the proposed model’s diagnosis and development. The relation between these stages is the main function of improving pecan orchard productivity. The study showed that to increase pecan productivity from 1.09 (t/ha) to 2.21 (t/ha), and to determine raw material needs, tools and/or labor, a standardized process is needed for pecan production. The study’s main contribution is the development of a production management process through which farmers can order and control production by means of indicators. Furthermore, the study proposes that the developed process of pecan production currently applied by farmers should be supported by a mathematical model simulation.
31
Nelson, Kent R. "Lateral Resistance of Piles Near Vertical MSE Abutment Walls at Provo Center Street". BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3926.
Testo completoAbstract (sommario):
Full scale lateral load tests were performed on four piles located at various distances behind MSE walls. Three of the four test piles were production piles used to support bridges, and the other pile a production pile used as part of the bridge abutment. The objective of the testing was to determine the effect of spacing from the wall on the lateral resistance of the piles and on the force resisted by the MSE reinforcement. Lateral load-displacement curves were developed for pile at various spacing and with various reinforcement ratio (reinforcement length, L divided by wall height, H). The force in the reinforcement was measured using strain gauges. Lateral load analyses were performed to determine the minimum spacing required to eliminate any effect of the wall on the pile resistance (p-multiplier of 1) and the reduction in soil resistance at closer spacings (p-multiplier less than 1). With the addition of the data fro Price (2012) tentative curves have been developed showing p-multiplier vs. normalized spacing behind wall for a length to height ratio of 1.6, 1.2, and 1.1. The data suggest that with a L/H ratio of 1.6, a p-multiplier of 1 can be used when the normalized distance from the back face of the MSE wall to the center of the pile is at least 3.8 pile diameters. When the L/H ratio decreases to 1.2 and 1.1 a p-multiplier of 1 can be used when the pile is at least 4.5 and 5.2 pile diameters behind the wall respectively. For smaller spacings, the p-multipliers decreased essentially linearly with normalized distance from the wall. A plot showing the increased load in the reinforcement as a function of distance from the pile has been developed. The data in the plot is normalized to the maximum lateral load and to the spacing from the wall to the pile. The best fit curve is capped at a normalized tensile force of approximately 0.12. The data show that the increase in tensile force on the reinforcement when a lateral load is applied to the piles decreases exponentially as the normalized distance from the pile increases. The plot is limited to the conditions tested, i.e. for the reinforcement in the upper 3 ft. of the wall with L/H values at 1.2.
32
Suncar, Oscar Ernesto. "Pullout and Tensile Behavior of Crimped Steel Reinforcement for Mechanically Stabilized Earth (MSE) Walls". DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/566.
Testo completoAbstract (sommario):
Many research studies made on hundreds of MSE walls have shown that in order to get lower values of lateral earth pressure coefficients from an active condition on the backfill soil, thus lower exerted loads and stresses on the reinforcement, the wall needs to yield. This is typical of extensible polymer-based wall systems, such as geosynthetics. Steel systems, on the other hand, are very rigid and do not allow enough deformation on the wall to generate the active condition. For this research, steel reinforcement for MSE walls that behaves similar to geosynthetics was developed. This was done by using crimps on steel bars that would allow the wall to deform as the crimps straighten. A pullout box was designed and constructed, where tensile and pullout tests were performed on the crimped reinforcement. Different crimp geometries on different bar diameters were tested under a range of confining pressures. From this, force-displacement curves were developed for these crimp geometries that could be used to predict deflections on walls with crimped reinforcement. In addition, the pullout resistance of the crimps in the straighten process was evaluated. This way, the crimps would not only be used to allow the wall to yield, but also as a pullout resistance mechanism. The pullout resistances per crimp for different tensions on the crimp and under a range of overburden pressures were evaluated. By combining the pullout resistance of the crimps and the force-displacement curves, a new internal stability design method was introduced where crimped reinforcement is used to resist both pullout and rupture failure. Also presented here are the pullout resistances of round bars with improved deformations of different diameters. These were found to have the same pullout resistance of square deformed bars with the same cross-sectional area. Round bars are preferred over square bars because they are more corrosion resistant and have longer design life.
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Bastos, Isabella Teixeira. "Narrativas profissionais em saúde mental presentes em casos de adolescentes cumprindo medidas socioeducativas (MSE)". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/6/6136/tde-10112017-111403/.
Testo completoAbstract (sommario):
Introdução - O conceito de adolescência, enquanto preparação para a fase adulta, esteve historicamente subjugado a um processo de criminalização, em particular para adolescentes pobres e tutelamento de condutas para outros adolescentes. A psicologia, a antropologia, a pediatria e a psiquiatria, entre outras disciplinas, estiveram presentes nesse processo e, posteriormente, na sua crítica. A construção de uma rede de cuidados em saúde mental que atendesse essa população sob outra perspectiva é ainda hoje palco de uma vinculação produtora de ambiguidades, cuidados e descuidados. Objetivo - Analisar as demandas em saúde mental e as práticas institucionais e clinicas geradas nos serviços voltados aos adolescentes cumprindo medidas socioeducativas (MSE). Métodos - Foram analisados os discursos e ações em saúde mental (SM) arrolados nos projetos individuais de acompanhamento de adolescentes cumprindo MSE em dois casos de adolescentes com demandas relacionadas à SM. Realizaram-se dezesseis sessões de GD e duas entrevistas no Centro de Referência Especializado em Assistência Social (CREAS); uma sessão de GD e cinco entrevistas no Centro de Atenção Psicossocial (CAPS); uma entrevista no Centro de Referência em Assistência Social (CRAS) e uma entrevista com a coordenadora de SM do município. Seguindo a estratégia qualitativa compôs-se uma cartografia dos caminhos visitados utilizando os conceitos de território, rizoma, desejo e intercessores (Deleuze). Resultados - No CREAS foi destacada a demanda relacionada ao uso de drogas e um caso de psicose. Além de outras demandas de sofrimento psíquico relacionadas a categorias delineadas pela pesquisadora como: mentalidade sofredora coletiva, ser \'filho da rede\', processos de vulnerabilidade, preconceito, violência e violação de direitos. A saúde mental apareceu frequentemente como categoria indefinida de cuidado, em que alguns profissionais declararam que não a atendiam, tão somente encaminhavam-na para outros equipamentos da rede de SM. Evidenciou-se a existência de dificuldade e ambiguidade na vinculação do adolescente aos serviços de cumprimento de MSE. Identificou-se no CRAS, um discurso voltado a estratégias de enfrentamento e de resiliência face às situações de vulnerabilidade por parte dos adolescentes. Todavia, esse trabalho é descontinuado diante da desinternação do adolescente e quebra do vínculo de obrigatoriedade. O CAPS AD apareceu como produtor de rede e de cuidado potente em um dos casos atendidos, mas, no outro caso, como instância de cuidado coadjuvante, no seguimento do processo de desinternação do adolescente, incluindo o suporte ao não cometimento futuro de ato infracional e à recaída no uso de drogas. Conclusão - As práticas de cuidado envolvendo o sofrimento psíquico dos adolescentes estão amiúde capturadas pelas questões relacionadas com a compulsoriedade e pelos motivos que levaram o adolescente a essas instituições. Verifica-se igualmente um engessamento do processo de monitoramento no cumprimento das MSE. Esse conjunto de situações dificulta o estabelecimento de relações de real cuidado exigido pelo trabalho em saúde mental enviesando até mesmo a própria ideia dele. As práticas de trabalho articuladas entre os diferentes equipamentos sociais (CREAS, CAPS, CRAS), em um dos casos, mostraram-se capaz de construir potência na vida dos adolescentes. Para isso, far-se-ia necessário construir projetos de aproximação em rede. Entende-se aí que tal cuidado em rede só se mostra efetivo na vinculação do adolescente a uma proposta antecipatória, protetiva e de continuidade não atrelada à questão da compulsoriedade ou a algum vício de origem. Faz necessário o entendimento da dinâmica dos conflitos sociais que permeiam a vida desses adolescentes e podem, sob certas condições, funcionar como alavanca para fazê-los reincidir no ato infracional.Introduction - The concept of adolescence, as a preparation for adulthood, has historically been subjected to a process of criminalization, particularly for poor adolescents and the provision of conduits for other adolescents. Psychology, anthropology, pediatrics, and psychiatry, among other disciplines, were present in this process and later in its criticism. The construction of a network of mental health care that would serve this population from another perspective is still the scene of a relationship that produces ambiguities, cares and carelessness. Objective - To analyze the demands on mental health and the institutional and clinical practices generated in services aimed at adolescents fulfilling socio-educational measures (MSE). Methods - Mental health (MH) discourses and actions listed in the individual follow-up projects of adolescents fulfilling MSE were analyzed in two cases of adolescents with MS related demands. Sixteen GD sessions and two interviews were held at the Specialized Reference Center on Social Assistance (CREAS); a GD session and five interviews at the Psychosocial Care Center (CAPS); an interview at the Reference Center on Social Assistance (CRAS) and an interview with the coordinator of the municipality\'s MS. Following the qualitative strategy was composed a cartography of the paths visited using the concepts of territory, rhizome, desire and intercessors (Deleuze). Results - In CREAS was highlighted the demand related to the use of drugs and a case of psychosis. In addition to other demands of psychic suffering related to categories delineated by the researcher as: mentally suffering collective, being \'child of the network\', processes of vulnerability, prejudice, violence and violation of rights. Mental health often appeared as an undefined category of care, in which some professionals stated that they did not attend to it, but simply referred it to other equipment in the SM network. It was evidenced the existence of difficulty and ambiguity in the attachment of adolescents to MSE compliance services. A discourse focused on coping and resilience strategies was identified at the CRAS in the face of situations of vulnerability on the part of adolescents. However, this work is discontinued in view of the disaffection of the adolescent and breaking the bond of compulsion. The CAPS AD appeared as a producer of network and powerful care in one of the cases served, but, in the other case, as an adjunct care, following the adolescent disinternation process, including support for the non-committment of an infraction and relapse into drug use. Conclusion - Care practices involving the psychological suffering of adolescents are often captured by issues related to compulsion and the reasons that led adolescents to these institutions. There is also a tightening of the monitoring process in compliance with the SSM. This set of situations makes it difficult to establish relations of real care required by work in mental health, even biasing the very idea of it. The work practices articulated between the different social equipments (CREAS, CAPS, CRAS), in one of the cases, were able to build potency in the life of the adolescents. For this, it would be necessary to construct projects of approximation in network. It is understood that such network care is only effective in linking the adolescent to an anticipatory, protective and continuity proposal that is not tied to the issue of compulsion or to an addiction of origin. It makes necessary the understanding of the dynamics of the social conflicts that permeate the life of these adolescents and can, under certain conditions, act as leverage to make them re-offend in the infraction act.
34
Jensen, Joshua Aaron. "Analysis of Full-Scale Mechanically Stabilized Earth (MSE) Wall Using Crimped Steel Wire Reinforcement". DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/4224.
Testo completoAbstract (sommario):
Mechanically Stabilized Earth (MSE) walls have provided an effective solution to constructing retaining walls. The engineering and construction industry is continually striving to provide more cost-effective and design-efficient means to building MSE walls. Hilfiker Retaining Walls has developed a new semi-extensible metal mat reinforcement technology which does not fit into the current extensible or inextensible categories as defined by regulating authorities. The objective of this project was to construct and observe the behavior collect quantitative data for a 20-foot tall MSE wall using the prototype semi-extensible reinforcement technology. The results were compared to expected American Association of State Highway and Transportation Officials Load Reduction Factored Design values and was also compared to another case study, Prediction of Reinforcement Loads in Reinforced Soil Walls as conducted by Tony M. Allen, P.E., and Richard J. Bathurst, Ph. D., P. Eng. Comparing the behavior of the 20-foot prototype MSE wall to these design regulations and case studies allowed for proper classification and will facilitate future industry design efforts.
35
Farnsworth, Zachary Paul. "Lateral Resistance of Grouped Piles Near 20-ft Tall MSE Abutment Wall with Strip Reinforcements". BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8694.
Testo completoAbstract (sommario):
A team from Brigham Young University and I performed full-scale lateral load tests on individual and grouped 12.75x0.375 inch pipe piles spaced at varying distances behind an MSE wall. The individually loaded pile which acted as a control was spaced at 4.0 pile diameters from the wall face, and the three grouped piles which were loaded in unison were spaced at 3.0, 2.8, and 1.8 pile diameters from the wall face and transversely spaced at 4.7 pile diameters center-to-center. The purpose of these tests was to determine the extent of group effects on lateral pile resistance, induced loads in soil reinforcements, and MSE wall panel deflections compared to those previously observed in individually laterally loaded piles behind MSE walls. The computer model LPILE was used in my analysis of the measured test data. The p-multipliers back-calculated with LPILE for the grouped piles were 0.25, 0.60, and 0.25 for the grouped piles spaced at 3.0, 2.8, and 1.8 pile diameters from the wall, respectively. These values are lower than that predicted for piles at the same pile-to-wall spacings using the most recent equation for computing p-multipliers. I propose the use of an additional p-multiplier for grouped piles near an MSE wall, a group-effect p-multiplier, to account for discrepancies between individual and grouped pile behaviors. The group effect p-multipliers were 0.35, 0.91, and 0.74 for the grouped piles spaced at 3.0, 2.8, and 1.8 pile diameters from the wall, respectively. The average group-effect p-multiplier was 0.66. Additionally, I used LPILE to analyze test data from Pierson et al. (2009), who had previously performed full-scale lateral load tests of individual and grouped shafts. In said analysis, the group of three 3-foot diameter concrete shafts spaced at 2.0 shaft diameters from the wall face and transversely spaced at 5.0 shaft diameters center-to-center had an average group effect p-multiplier of 0.78. As in previous studies, the induced forces in soil reinforcements in this study were greatest either near the locations of the test piles or at the MSE wall face. The most recent equation for calculating the maximum induced force in a soil reinforcement strip was reasonably effective in predicting the measured maximum loads when superimposed between the test piles, with 65% and 85% of the data points falling within the one and two standard deviation boundaries, respectively, of the original data used to develop the equation. Deflection of the MSE wall panels was greater during the grouped pile test than was previously observed for individually loaded piles under similar pile head deflections--with a maximum wall deflection of 0.31 inch compared to the previous average of 0.10 inch for pile head deflections of about 1.25 inches.
36
Strassburg, Alec N. "Influence of Relative Compaction on Passive Resistance of Abutments with Mechanically Stabilized Earth (MSE) Wingwalls". BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2593.
Testo completoAbstract (sommario):
Large scale static lateral load tests were completed on a pile cap with wingwalls under several different sand backfill configurations: no backfill, loosely compacted unconfined, loosely compacted slip plane wall confined, loosely compacted MSE wingwall confined, and densely compacted MSE wingwall confined. The relative compaction of the backfill was varied during each test to observe the change in passive resistance provided by the backfill. The wall types were varied to observe the force placed on the walls and the wall displacement as a result of the laterally loaded pile cap and backfill relative compaction. Passive force-displacement curves were generated from each test. It was found that the densely compacted material provided a much greater passive resistance than the loosely compacted material by 43% (251 kips) when confined by MSE walls. The outward displacement of the MSE walls decreased noticeably for the dense MSE test relative to the loose MSE test. Backfill cracking and heave severity also increased as the relative compaction level of the backfill increased. As the maximum passive force was reached, the reinforcement reached their peak pullout resistance. Correlations were developed between the passive pressure acting on the pile cap and the pressure measured on the MSE wingwalls as a function of distance from the pile cap for both loose and dense backfills. The pressure measured on the wingwalls was approximately 3 to 9% of the pressure acting on the pile cap. As the distance from the pile cap increased, the pressure ratio decreased. This result helps predict the capacity of the wingwalls in abutment design and the amount of allowable wall deflection before pullout of the backfill reinforcement occurs. Three methods were used to model the measured passive force-displacement curves of each test. Overall, the computed curves were in good agreement with the measured curves. However, the triaxial soil friction angle needed to be increased to the plane strain friction angle to accurately model both the loose and dense sand MSE and slip plane wall confined tests. The plane strain friction angle was found to be between 9 to 17% greater than the triaxial friction angle.
37
Han, Jarell. "Lateral Resistance of Piles near 15 Foot Vertical MSE Abutment Walls Reinforced with Ribbed Steel Strips". BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/5320.
Testo completoAbstract (sommario):
ABSTRACTLateral Resistance of Piles near 15 Foot Vertical MSE AbutmentWalls Reinforced with Ribbed Steel StripsJarell Jen Chou HanDepartment of Civil and Environmental Engineering, BYUMaster of ScienceA full scale MSE wall was constructed and piles were driven at various distances behind the wall. Lateral load tests were conducted to determine the effect of pile spacing from the wall on the lateral resistance of the piles and the force resisted by the MSE reinforcement. The piles used for this study were 12.75 inch pipe piles and the reinforcements were ribbed steel strips.Load-deflection curves were developed for piles located behind the wall at 22.4 inches (1.7 pile diameters), 35.4 inches (2.8 pile diameters), 39.4 inches (3.1 pile diameters) and 49.9 inches (3.9 pile diameters). Data results show that the lateral resistance of the pile decreases as the spacing behind the wall decreases. Measured load-deflection curves were used to compare with computed curves from LPILE with p-multiplier developed for the lateral resistance of piles closer to the wall. A curve was created showing the variation of p-multiplier with normalized pile spacing behind the wall. The curve suggests that a p-multiplier of 1 (no reduction in lateral resistance) can be used when a pile is placed at least four pile diameters from the back face of the wall.
38
Soriano, Vazquez Claudia Aide. "Corrosion behavior of galvanized steel reinforcements in MSE walls in the presence of soil organics". Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/51176.
Testo completoAbstract (sommario):
Mechanically Stabilized Earth is a civil infrastructure technology that is widely used in retaining walls. Although the structures are designed for a service life of 75 years, early distress has been reported. Corrosion of the galvanized steel reinforcements has been pointed as one of the major causes that jeopardize their long-term performance.
The corrosion behavior of galvanized steel in the presence of organics found in soil is studied through electrochemical techniques as PDP, EIS and LPR in two types of solutions at various concentrations below 1 wt%. The first type of solutions aims to determine the corrosion behavior in the presence of individual organic reagents: humic acid, dextrose, citric acid and oxalic acid. The second type of solutions is prepared with a system that combines the organic reagents in proportions that simulate the typical composition of organic matter in soil and is called Simulated Soil Organic Matter (SSOM). Subsequently, the surface is analyzed using SEM and EDX.
The data shows that the corrosion effect of organic matter on galvanized steel depends on its composition. The comparison of the highest current density produced by the individual organics, allows ranging them in terms of their aggressiveness on galvanized steel in the following order: citric acid > oxalic acid > humic acid > dextrose. The Simulated Soil Organic Matter was able to corrode the zinc coating and the base steel.Applied Science, Faculty of
Materials Engineering, Department of
Graduate
39
Ganesh, Nadarajasundaram. "Small area estimation and prediction problems spatial models, Bayesian multiple comparisons and robust MSE estimation /". College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7241.
Testo completoAbstract (sommario):
Thesis (Ph. D.) -- University of Maryland, College Park, 2007.Thesis research directed by: Mathematics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Besendorfer, Jason James. "Lateral Resistance of Pipe Piles Near 20-ft Tall MSE Abutment Wall with Strip Reinforcements". BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5922.
Testo completoAbstract (sommario):
Full scale lateral load testing was performed on four 12.75x0.375 pipe piles spaced at 3.9, 2.9, 2.8, and 1.7 pile diameters behind an MSE wall which was constructed for this research to determine appropriate reduction factors for lateral pile resistance based on pile spacing behind the back face of the wall. The load induced on eight soil reinforcements located at various transverse distances from the pile and at different depths was monitored to determine the relationship between lateral load on the pile and load induced in the reinforcement. Each pile was loaded towards the wall in 0.25 in. increments to a total deflection of 3.0 in. Additionally, wall panel displacement was also monitored to determine if it remained in acceptable bounds. The results of the research indicate that pile resistance tends to decrease as spacing decreases. P-multipliers for the 3.9, 2.9, 2.8, 1.7D tests were found to be 1.0, 1.0, 1.0, and 0.5, respectively using back-analysis with the computer model LPILE. However, these multipliers are higher than expected based on previous testing and research. Piles spaced further than 3.8D can be assumed to have no interaction with the wall. The resistance of piles spaced closer to the wall than 3.8D can be modeled in LPILE using a p-multiplier less than 1.0. The reinforced backfill can be modeled in LPILE using the API Sand (1982) method with a friction angle of 31º and a modulus of approximately 60 pci when a surcharge of 600 psf is applied. If no surcharge is applied, a friction angle of 39º and modulus of 260 pci is more appropriate. Maximum wall panel displacement was highest for the 2.8D test and was 0.35 in. at 3.0 in. of pile head displacement. For all the other tests, the maximum wall displacement at 3.0 in. of pile head displacement was similar and was approximately 0.15 inches. Induced load in the soil reinforcement increases with depth to the 2nd or 3rd layer of reinforcement after which it decreases. Induced load in the reinforcement increases as pile spacing decreases. Induced load in the reinforcement decreases rapidly with increased transverse distance from the pile. Induced load in the reinforcement can be estimated using a regression equation which considers the influence of pile load, pile spacing behind the wall, reinforcement depth or vertical stress, and transverse spacing of the reinforcement.
41
Távora, Fabiano Touzdjian Pinheiro. "Proteômica comparativa de isolados de Xanthomonas campestris pv. campstris contrastantes em virulência". Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/4013.
Testo completoAbstract (sommario):
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A bactéria fitopatogênica Xanthomonas campestris pv. campestris (Xcc) consiste no agente causal da podridão negra que acomete todas as variedades comerciais do gênero Brassica, sendo responsável por perdas significativas na brassicultura nacional e mundial. O objetivo deste trabalho consistiu em traçar o perfil proteômico de dois isolados de Xcc, distintos quanto à virulência, utilizando um sistema in vitro para a identificação de proteínas diferencialmente abundantes relacionadas aos mecanismos de virulência. Inicialmente, curvas de crescimento bacteriano foram desenvolvidas afim de se determinar o momento apropriado para a coleta e extração de proteínas. Os isolados Xcc51 e XccY21 foram cultivados em dois meios de cultura distintos, sendo um nutricionalmente rico (NYG) e outro capaz de induzir a transcrição de genes relacionados à virulência (meio mínimo – XVM1), até atingirem a fase exponencial máxima de crescimento bacteriano (OD600nm = 0,8 em meio NYG e OD600nm = 0,58 em meio XVM1). As proteínas totais dos isolados foram extraídas usando fenol, precipitadas com acetato de amônio em metanol, digeridas com tripsina e analisadas pela técnica 2DnanoUPLC/MSE, utilizando a plataforma de identificação e quantificação de proteínas Protein Lynx Global Server (PLGS). Os dados obtidos foram comparados com sequências depositadas no banco de dados XGB (The Xanthomonas Genome Browser). Foram identificadas mais de 600 proteínas no proteoma total de ambos os isolados de Xcc, revelando a expressão de proteínas exclusivas, bem como um perfil diverso de proteínas aumentadas e diminuídas entre os isolados durante o cultivo nos dois meios. Com o auxílio do software BLAST2GO, foi realizada uma análise baseada na ontologia dos produtos gênicos. Os resultados obtidos evidenciam que durante a condição de indução de genes de patogenicidade, o isolado mais virulento Xcc51 se destacou pela abundância de importantes proteínas relacionadas à infecção bacteriana, como bfeA, TonB, ompP6, clpB, tig, acvB, quando comparado à quantidade exibida no isolado XccY21. Os dados proteômicos gerados pelo presente estudo apresentaram um interessante rol de proteínas diferencialmente aumentadas e supostamente relacionadas à patogenicidade e virulência de Xcc, o qual poderá nortear futuras investigações quanto aos mecanismos moleculares envolvidos na patogênese dessa fitobactéria.
The phytopathogenic bacterium Xanthomonas campestris pv. campestris (Xcc) consist in the black rot disease causal agent, which affects all Brassica genus commercial varieties. This disease results in significant losses for brassicultures worldwide. The present study aimed to analyze the proteomic profile of two distinct Xcc isolates, employing an in vitro system for the identification of differentially abundant proteins, related to pathogenicity and virulence mechanisms. Initially, bacterial growth curves were assessed to determine the appropriate stage for protein extraction. Xanthomonas isolates Xcc51 and XccY21 were cultured in two distinct mediums, a nutritionally rich medium (NYG) and a minimal medium - XVM1, capable of inducing the transcription of pathogenicity genes, until they reached maximum exponential growth phase (OD600nm = 0.8 A. and OD600nm = 0.52 A., respectively). Total proteins were extracted using phenol/ammonium acetate, trypsin digested and analyzed by 2DnanoUPLC/MSE, coupled with Protein Lynx Global Server (PLGS). Xanthomonas Genome Browser database was used, leading to the identification of more than 600 proteins and revealing the expression of unique proteins as well as diverse profiles of increased and decreased proteins. Blast2GO software was applied to analyze gene ontology. Results suggest that during pathogenicity inducing condition, the isolate Xcc51 increases the abundance of crucial infection-related proteins such as bfeA, TonB, ompP6, clpB, acvB, when compared to XccY21 which could explain its higher virulence. The proteomic data showed by the present study delivered a list of interesting proteins presumably related with pathogenicity and virulence of Xcc, which could guide future investigations on molecular mechanisms involved in this phytobacterium pathogenesis.
42
Maw, Ryan Bruce. "Development of Mechanically Stabilized Earth (MSE) Wall Inspection Plan and Procedure For Failure Mode Analysis and Risk Assesment". DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/483.
Testo completoAbstract (sommario):
A large component of the State of Utah's transportation network involves the use of MSE walls, which have proven useful in infrastructure for their reduced costs and footprint compared to other alternatives. As effective as MSE walls have been in responding to demands in transportation, they also have inherent challenges. For the majority of MSE walls the structure is limited in observation as structural components are buried as part of the soils mass. This inability to observe at can lead to the development of complex failure mechanisms, which can be difficult to assess and anticipate. As society becomes increasingly reliant on the transportation networks for goods, services, and security, properly understanding the potential failure mechanisms of MSE walls also increases in importance. This thesis discusses the development of an inspection procedure, data collection, geotechnical asset management database, and an evaluation of gathered information to be used in a reliability analysis of MSE walls for the State of Utah. The findings suggest areas of improvement in the design, specifications, maintenance, and further investigation of MSE walls.
43
Arenas, Alfredo Eduardo. "Thermal Response of Integral Abutment Bridges With Mse Walls: Numerical Analyses and a Practical Analysis Tool". Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/30134.
Testo completoAbstract (sommario):
The advantages of Integral Abutment Bridges (IABs) include reduced maintenance costs and increased useful life spans. However, comprehensive and practical analysis tools for design of IABs have not been developed to account for the impacts of thermal displacements on abutment and foundation components, including the components of mechanically stabilized earth (MSE) walls that are often used around the abutment piling.
During this research, over 65 three-dimensional numerical analyses were performed to investigate and quantify how different structural and geotechnical bridge components behave during thermal expansion and contraction of the bridge deck. In addition, separate three-dimensional numerical models were developed to evaluate the usefulness of corrugated steel pipes around the abutment piles.
The results of this research quantify the influence of design parameter variations on the effects of thermal displacement on system components, and thus provide guidelines for IAB design, where none had existed before. One of the findings is that corrugated steel pipes around abutment piles are not necessary.
One of the most important products of this research is an easy-to-use Excel spreadsheet, named IAB v2, that not only quantifies the impact of thermal displacement in the longitudinal direction, but also in the transverse direction when the abutment wall is at a skew angle to the bridge alignment. The spreadsheet accommodates seven different pile sizes, which can be oriented in weak or strong directions, with variable offset of the abutment from the MSE wall and for variable skew angles. The spreadsheet calculates the increment of displacements, forces, moments, and pressures on systems components due to thermal displacement of IABs.Ph. D.
44
Nukareddy, Praveena. "Quantification Of Mouse Cardiac Troponin I And Myosin Binding Protein C Phosphorylation By Liquid Chromatography-Mass Spectrometry (lc-Ms)". ScholarWorks @ UVM, 2018. https://scholarworks.uvm.edu/graddis/986.
Testo completoAbstract (sommario):
Heart failure is a major public health issue, with its prevalence estimated to be 6.5 million adults in the USA. Of the hospitalized heart failure (HF) cases, 50% are characterized by preserved ejection function (HFpEF). In HFpEF, the heart pumps a normal proportion of blood that enters it. However, thickening of the ventricular walls inhibits the chamber filling to normal volume. The direct basis of HFpEF is a slowed elongation of the cardiac muscle during the diastolic phase of the cardiac cycle. Elucidation of mechanisms that mediate relaxation of cardiac muscle could help understand the pathogenic mechanisms in HFpEF.
Myocardial contraction and relaxation are tightly controlled processes that involve thick and thin filament regulatory proteins. β-Adrenergic signaling pathway is a major regulator of myocardial contraction and relaxation via the activation of protein kinase A (PKA). Two key myofilament proteins, troponin I (TnI) and myosin binding protein-C (MyBPC), are phosphorylated by PKA following β-adrenergic stimulation. The purpose of this thesis is to develop a liquid chromatography-mass spectrometry (LC-MS) method for the quantification of phosphorylation in TnI and MyBPC and measure the changes in the degree of phosphorylation in transverse-aortic constriction (TAC) mouse hearts, a model representing HFpEF, and sham (control) mouse hearts.
The initial approach of the project was to develop a method for quantification of phosphopeptides using synthesized stable isotope labeled (SIL) peptides, both with and without phosphate modification. To accomplish this goal, a multiple reactions monitoring (MRM)-LC-MS method for the quantification of the synthesized SIL peptides was first developed. This method, using low picomole amounts, is applicable to researchers in the field using SIL peptides for quantification. However, when the SIL peptides were actually applied, we determined that there was a selective absorption of some phosphate peptides in the LC column, limiting the use of the SIL peptides for quantification. This result is also of general interest to others trying to identify phosphopeptides, not realizing that some peptides will go unmeasured. Thus, we returned to expanding an earlier method developed in our research group to quantify the degree of phosphorylation. Key to this work was the development of a quantification method directly from heart myofibrillar protein preparations without requiring isolation of individual proteins by gel electrophoresis.
Using the LC-MS method developed, we quantified phosphorylation sites of TnI and MyBPC in the TAC and control mouse hearts. The phosphorylation measurements showed no significant difference in phosphorylation between the TAC and control mice, except for one site, S302 in MyBPC that had a 13% decrease in phosphorylation with TAC. We conclude that in our TAC model, PKA dysfunction may not play a role in the initial development of HFpEF.
45
Garamendi-Colos, Virginia, Mercedes Cano-Lazarte, Nestor Mamani-Macedo, Carlos Raymundo e Francisco Dominguez. "Agile Inventory Management Model Under a Digital Transformation Approach for Stockout Reduction in Chemical Industry’s MSE". Springer, 2020. http://hdl.handle.net/10757/656371.
Testo completoAbstract (sommario):
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.Through digital transformation, company processes that are, or could be, conducted manually are reduced; moreover, human tasks are automated when software-based processes are established. This paper analyzes the adoption of a digital transformation tool to manage inventory through the application of agile models, such as Just-In-Time, and the use of Enterprise Resource Planning (ERP), employing the Deming cycle method, as several unclear empiric processes exist for managing inventory and purchases. It also upholds that as defined processes are established and the companies exert higher control over inventory turnover and outflows, they could apply methods, such as demand forecasting, to avoid stockout, supply shortage, and inventory loss.
46
Franke, Bryan William. "Passive Force on Skewed Abutments with Mechanically Stabilized Earth (MSE) Wingwalls Based on Large-Scale Tests". BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3909.
Testo completoAbstract (sommario):
Passive force-deflection behavior for densely compacted backfills must be considered in bridge design to ensure adequate resistance to both seismic and thermally induced forces. Current codes and practices do not distinguish between skewed and non-skewed bridge abutment geometries; however, in recent years, numerical models and small-scale, plane-strain laboratory tests have suggested a significant reduction in passive force for skewed bridge abutments. Also, various case studies have suggested higher soil stresses might be experienced on the acute side of the skew angle. For these reasons, three large-scale tests were performed with abutment skew angles of 0, 15 and 30 degrees using an existing pile cap [11-ft (3.35-m) wide by 15-ft (4.57-m) long by 5.5-ft (1.68-m) high] and densely compacted sand backfill confined by MSE wingwalls. These tests showed a significant reduction in passive force (approximately 38% as a result of the 15 degree skew angle and 51% as a result of the 30° skew angle. The maximum passive force was achieved at a deflection of approximately 5% of the backwall height; however, a substantial loss in the rate of strength gain was observed at a deflection of approximately 3% of the backwall height for the 15° and 30° skew tests. Additionally, the soil stiffness appears to be largely unaffected by skew angle for small displacements. These results correlate very well with data available from numerical modeling and small-scale lab tests. Maximum vertical backfill displacement and maximum soil pressure measured normal to the skewed backwall face were located on the acute side of the skew for the 15° and 30° skew test. This observation appears to be consistent with observations made in various case studies for skewed bridge abutments. Also, the maximum outward displacement of the MSE wingwalls was located on the obtuse side of the skew. These findings suggest that changes should be made to current codes and practices to properly account for skew angle in bridge design.
47
Budd, Ryan Thomas. "Lateral Resistance of Pipe Piles Behind a 20-Foot-Tall MSE Wall with Welded-Wire Reinforcements". BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6216.
Testo completoAbstract (sommario):
Pile foundations for bridges must often resist lateral loads produced by earthquakes and thermal expansion and contraction of the superstructure. Right-of-way constraints near bridge abutments are leading to an increased use of mechanically stabilized earth (MSE) walls below the abutment. Previous research has shown that lateral pile resistance can be greatly reduced when piles are placed close to MSE walls but design codes do not address this issue. A full-scale MSE wall was constructed and 24 lateral load tests were conducted on pipe, square and H piles spaced at distances of about 2 to 5 pile diameters from the back face of the wall. The MSE wall was constructed using welded-wire grid and ribbed strip inextensible reinforcements. This paper focuses on four lateral load tests conducted on steel pipe piles located behind a 20-ft section of MSE wall reinforced with welded-wire grids. Results showed that measured lateral resistance decreases significantly when pipe piles are located closer than about 4 pile diameters from the wall. LPILE software was used to back-calculate P-multipliers that account for the reduced lateral resistance of the pile as a function of normalized spacing from the wall. P-multipliers for this study were 0.95, 0.68, and 0.3 for piles spaced 4.3, 3.4 and 1.8 pile diameters from the wall, respectively. Based on results from this study and previous data, lateral pile resistance is relatively unaffected (p-multiplier = 1.0) for piles spaced more than approximately 3.9 pile diameters (3.9D) from the MSE wall. For piles spaced closer than 3.9D, the p-multiplier decreased linearly as distance to the wall decreased. P-multipliers were not affected by differences in reinforcement length to height (L/H) ratio or reinforcing type. Lateral pile loads induce tensile forces in the soil reinforcement such that, as pile load increases the maximum induced tensile force increases. Results also indicate that maximum tensile forces typically occurred in the soil reinforcement near the pile location. Past research results were combined with data from this study and a statistical regression analysis was performed using all data associated with welded-wire grid reinforcements. A regression equations was developed to predict the peak induced tensile force in welded-wire grids based on independent variables including lateral pile load, normalized pile distance (S/D), transverse distance (T/D), L/H ratio, and vertical stress. The equation has an R2 value of 0.79, meaning it accounts for approximately 79% of variation for all welded-wire grid reinforcements tested to date.
48
Василько, Мечислав Олександрович, e Mechyslav Vasylko. "Модернізація сепаратора MSE 100-01-177 з дослідженням впливу технологічних і конструктивних параметрів на процес розділення молока". Master's thesis, ТНТУ, 2021. http://elartu.tntu.edu.ua/handle/lib/35191.
Testo completoAbstract (sommario):
У кваліфікаційній роботі проаналізовано сучасні процеси та обладнання для
відцентрової обробки молока, проведено аналіз призначення, будови та принципу роботи
сепаратора MSE 100-01-177. Виконано технологічні, кінематичні та енергетичні
розрахунки, розроблено структурну та кінематичну схеми, а також проектування та
розрахунок окремих елементів сепаратора MSE 100-01-177. Наведено особливості
експлуатації та технічного обслуговування сепаратора MSE 100-01-177 . Проведено
теоретичне дослідження процесу відцентрового розділення молока. В кваліфікаційній
роботі досліджено вплив технологічних і конструктивних параметрів, режимів роботи,
характеристик сировини на процес відцентрового розділення молока на сепараторі MSE
100-01-177 . Сформульовано результати досліджень та розроблено рішення з
вдосконалення процесу відцентрової обробки молока на сепараторі MSE 100-01-177.
Представлено заходи з охорони праці та безпеки в надзвичайних ситуаціяхВступ. 1. Аналіз сучасного стану Технології та обладнання для відцентрового розділення при переробці Молока. 2. Методи та методика досліджень. 3. Проектно-технологічні й Технічні рішення по конструкції сепаратора mse 100-01-177. 4. Дослідження Процесу відділення вершків у сепараторі mse 100-01-177. 5. Охорона праці та Безпека в надзвичайних ситуаціях. Висновки. Перелік посилань.
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López, Ochoa Alexander Richard. "Investigations and simulations of magneto elastomer materials (MSE) influenced by static magnetic fields for soft robotics applications". Master's thesis, Pontificia Universidad Católica del Perú, 2019. http://hdl.handle.net/20.500.12404/15457.
Testo completoAbstract (sommario):
Magneto-sensitive Elastomere sind Verbundwerkstoffe, die hauptsächlich aus einer Elastomermatrix bestehen, in der magnetischen Partikeln dispergiert sind. Ein ins magnetosensitive Elastomer eingreifende Magnetfeld bewirkt Änderungen der Eigenschaften dieses Materials. Diese Qualität macht die MSE zu einer Option mit hohem Potenzial für Soft Robotics- Anwendungen. Für die Realisierung dieser Masterarbeit wurden MSE-Proben aus einer Elastomermatrix, Silikonöl und Carbonyleisenpartikeln hergestellt.
Tests wurden durchgeführt, um Verbesserungen zu entwickeln, die sich auf Soft-Robot- Anwendungen konzentrieren, insbesondere bei Endeffektoren. In dieser Arbeit wurden die
Eigenschaften von magneto-sensitive Elastomerproben in Abwesenheit und Gegenwart eines Magnetfeldes experimentell untersucht. Die untersuchungen wurden mittels eines Magnetfeldes realisiert, dass durch einen Permanentmagneten induziert wurde. Um die Intensität zu varriieren, wurde der Permanetmagent in unterschiedlichen Abständen zur Probe positioniert. Die experimentell erhaltenen Ergebnisse wurden verwendet, um den Einfluss der MF über der MSE zu verstehen und ein geeignetes Materialmodell unter Verwendung der Finite-Elemente-Methode zu entwickeln.Magneto-sensitive elastomers are composite materials made mainly of an elastomer matrix, in which magnetic particles are dispersed. A magnetic field applied in the magneto sensitive elastomers achieves changes in the properties of this material. This quality turns the magneto-sensitive elastomers in an option with high potential in soft robotics applications. In the present thesis, samples of magneto-sensitive elastomers containing an elastomeric matrix, silicone oil and carbonyl iron particles were produced. Tests were performed in order to develop improvements focused on soft robotic applications, particularly in end effectors. In this thesis, the properties of magneto-sensitive elastomers samples have been experimentally studied in the absence and presence of a magnetic field. The magnetic field was induced by a permanent magnet that was moved at different distances from the sample to change the intensity of the magnetic field. The results obtained by experiments were used to understand the influence of the magnetic field on the magneto-sensitive elastomer and to obtain a suitable material model using finite element method.
Los elastómeros magneto-sensibles son materiales compuestos hechos principalmente de una matriz de elastómero, en la que se dispersan las partículas magnéticas. Un campo magnético aplicado en los elastómeros magneto-sensibles logra cambios en las propiedades de este material. Esta cualidad convierte los elastómeros magneto-sensibles en una opción con alto potencial en aplicaciones de robótica blanda. En la presente tesis, se fabricaron muestras de elastómeros magneto-sensibles que contenían una matriz elastomérica, aceite de silicona y partículas de hierro carbonilo. Se realizaron pruebas para desarrollar mejoras enfocadas en aplicaciones de robótica blanda, particularmente en efectores finales. En esta tesis, las propiedades de las muestras de elastómeros magneto-sensibles han sido estudiadas experimentalmente en ausencia y presencia de un campo magnético. El campo magnético fue inducido por un imán permanente que se movió a diferentes distancias de la muestra para cambiar la intensidad de este campo magnético. Los resultados obtenidos por experimentos se utilizaron para comprender la influencia del campo magnético en el elastómero magneto sensible y para obtener un modelo de material adecuado utilizando el método de elementos finitos.
Tesis
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Brandl, Matthias Simon. "Higher order asymptotics for the MSE of robust M-estimators of location on shrinking total variation neighborhoods". kostenfrei, 2008. http://opus.ub.uni-bayreuth.de/volltexte/2009/510/.
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