Dissertationen: „Metoda 141“

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Hendrych, Marek. „Možné chyby návrhu a provedení svarů pro následnou chemickou úpravu mořením“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443190.

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The diploma thesis deals with the issue of surface treatment by pickling. In the research part the pickling technology is described in detail. The next chapters are focused on the TIG welding method and the weldability of austenitic stainless steels. In the experimental part an experiment is carried out focusing on the comparison of weight loss and surface quality depending on the pickling time. Part of the conclusion is the implementation of pWPS documentation for the specified component and a brief manual for customers of pickling plant.

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Daniels, Jason M. „Forensic and Anti-Forensic Techniques for OLE2-Formatted Documents“. DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/141.

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Common office documents provide significant opportunity for forensic and anti-forensic work. The Object Linking and Embedding 2 (OLE2) specification used primarily by Microsoft’s Office Suite contains unused or dead space regions that can be over written to hide covert channels of communication. This thesis describes a technique to detect those covert channels and also describes a different method of encoding that lowers the probability of detection. The algorithm developed, called OleDetection, is based on the use of kurtosis and byte frequency distribution statistics to accurately identify OLE2 documents with covert channels. OleDetection is able to correctly identify 99.97 percent of documents with covert channel and only a false positive rate 0.65 percent. The improved encoding scheme encodes the covert channel with patterns found in unmodified dead space regions. This anti-forensic technique allows the covert channel to masquerade as normal data, lowering the ability probability for any detection tool to is able to detect its presence.

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Dodici, Adria Danielle. „The Relationship Between Teachers' Multicultural Attitudes and Their Instructional Practice with English Language Learners: A Mixed Method Study“. PDXScholar, 2011. http://pdxscholar.library.pdx.edu/open_access_etds/141.

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Teachers of English language learners (ELLs) are often ill prepared to provide content area instruction tailored to their students' needs. This explanatory mixed method study examined the relationship between 15 ELL teachers' multicultural attitudes and use of sheltered instruction (SI). The purpose of the study was to ascertain whether teachers' multicultural attitudes influenced their use of SI. Data were gathered using a Demographic Questionnaire, Multicultural Efficacy Scale (MES), Classroom Instruction Questionnaire, and semi-structured interviews. A correlational analysis found no statistically significant relationship (i.e., r = -.34; p = .22) between participants' scores on SI observations and the MES. A correlational estimate for the four highest SI scorers indicated a relationship between the two sets of scores (i.e., r = .75; p = .25). Qualitative data did not indicate any patterns that might distinguish the high and low SIOP scorers; however, Aptitude Measurement Interaction may explain the different correlational results.

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Liu, Ran. „Synthesis, characterization and properties of nanostructured materials by template-directed method“. ScholarWorks@UNO, 2004. http://louisdl.louislibraries.org/u?/NOD,141.

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Thesis (M.S.)--University of New Orleans, 2004.
Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Chemistry."--Thesis t.p. Vita. Includes bibliographical references.

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Yang, Weixuan. „Temperature-dependent homogenization technique and nanoscale meshfree particle methods“. Diss., University of Iowa, 2007. http://ir.uiowa.edu/etd/147.

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Green, III Respent. „Impact of Middle-Level Managers' Well-Being and Happiness on Direct Reports' Performance“. ScholarWorks, 2014. https://scholarworks.waldenu.edu/dissertations/141.

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The happy productive worker (HPW) theory states that happy employees perform at higher levels than unhappy employees do. Despite the explanatory power of the HPW theory, it was unknown if a happy middle-level manager would be associated with productive direct reports. The purpose of this phenomenological study was to address that gap by exploring the impact of middle-level managers' well-being and happiness on the performance of their direct reports. Key research questions examined how middle-level managers' well-being and happiness influenced the performance of their direct reports and how middle-level managers' application of the HPW theory influenced social change. Twenty middle-level managers from varied organizations participated in semistructured interviews to generate data. Data were subjected to content analysis to identify emergent categories and themes. Findings showed that middle-level managers' well-being and happiness had both positive and negative influences on direct reports' performance in that reports tended to mirror their middle-level manager's level of well-being and happiness. Whenever the middle level manager was happy, their reports' productivity increased, and whenever the middle level manager was unhappy, reports' productivity decreased. The overall conclusion was that middle-level managers' well-being and happiness in the workplace are important and offer opportunities to help direct reports to grow and to flourish in their department of the organization. Recommendations include further study of the strategies middle-level managers use to influence direct reports' advancement toward their potential. Organizational leaders may apply these findings through professional development training to enhance the growth and improve the productivity of their direct reports.

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Hecksén, Alexander. „Distributed Operations : En förmåga eller en metod?“ Thesis, Swedish National Defence College, Swedish National Defence College, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-143.

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Uppsatsen behandlar det amerikanska konceptet Distributed Operations (DO) kopplat mot den svenska doktrinutvecklingen. Uppsatsen bygger på Mika Ihalainens uppsats om DO som en framtida upprorsbekämpningsmetod. Uppsatsen avser fortsätta på Mika Ihalainens uppsats, och då främst med hans egna förslag på vidare forskning. Syftet med uppsatsen är att besvara frågeställningen ”Är Distributed Operations en förmåga eller en metod utifrån hur konceptet nyttjades under Falklandskriget?” och att ge ett konceptexempel på hur den svenska Försvarsmakten kan hantera en lågtek-nologisk fiende samt bidraga till den svenska doktrinutvecklingen, framförallt genom en definition av begreppen förmåga och metod. Ytterligare ett syfte med uppsatsen är att ”öppna upp” för vidare studier kring ämnet. Problemställningen har angripits med en kvalitativ textanalys där den nominella definitionen av begreppen förmåga och metod har väglett författaren genom empirin och slutligen resulterat i ett försöka att avgöra huruvida DO är en förmåga eller me-tod, sett från hur det nyttjades av SAS i Falklandskriget. Empirin har i huvudsak bestått av major Mika Ihalainens och major Brian L. Gilmans (USMC) uppsatser samt ett urval av deras källor. Även svenska ordböcker och doktriner har använts för framtagandet av en nominell definition av de för uppsatsen centrala begreppen. Uppsatsen visar att Distributed Operations bör betraktas som just ett koncept, ett koncept som skapar, binder samman och driver utvecklingen av metoder i syfte att uppnå vissa förmågor.

The essay deals with the American concept of Distributed Operations (DO) and the Swedish development of doctrines. The essay has its origin in major Mika Ihalainens essay on DO as a future method of fighting Small Wars. This essay intends to continue with Mika Ihalainens suggestion for future research and the dual purpose of this essay is to answer the question “Is Distributed Operations a capability or a method as seen from how it was used during the Falklands war?”. It’s second purpose is to describe a concept to the Swedish Armed Forces as an example on how to deal with a low-tech enemy and also to contribute to the Swedish doctrinal development, especially re-garding the definition of the concepts capability and method. Another purpose of this essay is to open up the subject for more widened and thorough studies. This study has been carried out through a qualitative analysis where the definition of capability and method has guided the author through the empiric material and has fi-nally resulted in an attempt to decide whether DO is a capability or a method, based upon how the concept was used by the SAS during the Falklands war. The empiric ma-terial has mainly consisted of major Mika Ihalainens and major Brian L. Gilmans essays and has been complemented with their original sources. The author has also used Swedish dictionaries and doctrines for the production of the nominal definition of the central notions of the essay. The result of the essay is that Distributed Operations should be considered as a con-cept which creates, binds together and forces the development of methods with the purpose to achieve certain capabilities.

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MATOS, IZABELA T. de. „Padronização dos radionuclídeos F-18 e In-111 e determinação dos coeficientes de conversão interna total para o In-111 em sistema de coincidência por software“. reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10615.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Labron, Timothy. „John 1:14a and Rudolf Bultmann's hermeneutical method“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/MQ42405.pdf.

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Fantini, Massimiliano <1973&gt. „Strumenti e metodi per la progettazione industriale applicati alla conservazione e valorizzazione dei beni culturali“. Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/140/.

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BRITO, ANDREIA B. de. „Determinação da taxa de desintegração de Tc-99m e In-111 em sistemas de coincidências“. reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10047.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Ciacci, Simone <1968&gt. „Modelli di prestazione ed allenamento speciale della velocità in atletica leggera“. Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/131/.

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Zhang, Lin. „Generalized finite element method for multiscale analysis“. Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/1141.

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This dissertation describes a new version of the Generalized Finite Element Method (GFEM), which is well suited for problems set in domains with a large number of internal features (e.g. voids, inclusions, etc.), which are practically impossible to solve using the standard FEM. The main idea is to employ the mesh-based handbook functions which are solutions of boundary value problems in domains extracted from vertex patches of the employed mesh and are pasted into the global approximation by the Partition of Unity Method (PUM). It is shown that the p-version of the Generalized FEM using mesh-based handbook functions is capable of achieving very high accuracy. It is also analyzed that the effect of the main factors affecting the accuracy of the method namely: (a) The data and the buffer included in the handbook domains, and (b) The accuracy of the numerical construction of the handbook functions. The robustness of the method is illustrated by several model problems defined in domains with a large number of closely spaced voids and/or inclusions with various shapes, including the heat conduction problem defined on domains with porous media and/or a real composite material.

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Manukyan, Narine. „Improved Methods for Cluster Identification and Visualization“. ScholarWorks @ UVM, 2011. http://scholarworks.uvm.edu/graddis/147.

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Self-organizing maps (SOMs) are self-organized projections of high dimensional data onto a low, typically two dimensional (2D), map wherein vector similarity is implicitly translated into topological closeness in the 2D projection. They are thus used for clustering and visualization of high dimensional data. However it is often challenging to interpret the results due to drawbacks of currently used methods for identifying and visualizing cluster boundaries in the resulting feature maps. In this thesis we introduce a new phase to the SOM that we refer to as the Cluster Reinforcement (CR) phase. The CR phase amplifies within-cluster similarity with the consequence that cluster boundaries become much more evident. We also define a new Boundary (B) matrix that makes cluster boundaries easy to visualize, can be thresholded at various levels to make cluster hierarchies apparent, and can be overlain directly onto maps of component planes (something that was not possible with previous methods). The combination of the SOM, CR phase and B-matrix comprise an automated method for improved identification and informative visualization of clusters in high dimensional data. We demonstrate these methods on three data sets: the classic 13- dimensional binary-valued “animal” benchmark test, actual 60-dimensional binaryvalued phonetic word clustering problem, and 3-dimensional real-valued geographic data clustering related to fuel efficiency of vehicle choice.

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Hillyard, Sam. „An exploration of the dialectic between theory and method in ethnography“. Thesis, University of Warwick, 2003. http://wrap.warwick.ac.uk/1241/.

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The thesis poses three core questions: 1. What is ethnography? 2. What is the role of theory in ethnography? 3. What (and how) can ethnography contribute to the cumulative development of sociologieal theory? The thesis develops a reflexive awareness of the persuasiveness of the theory-method dialectic in ethnography. It explores the processes through which ethnography generates knowledge through social research and hence the basis upon which ethnography rests its claims about the social world. The thesis conducts a specific case study of one ethnographic 'theory' that was developed through a series of classic ethnographic research monographs. The context of the theory in relation to the historical development of ethnography is evaluated and an area for further theoretical development identified. This area was then tested in new, original fieldwork with the aim to contribute to further theoretical cumulation. The thesis offers two conclusions. The first considers what lessons have been learned through the approach to theorising used by the thesis and if it represents a model for future ethnographic research to follow. The final conclusion of the thesis calls for a greater awareness of the capacity of ethnography to contribute to theory cumulation. It suggests the role of theory has become more implicit than explicit. However, the ethnographic research conducted here has, albeit in one small case study, acknowledged the potential of theory for ethnography. This is vital if ethnography is to offer a sophisticated approach to social research and to contribute to sociological knowledge.

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Cerutti, Lisa. „Visual grounded analysis : developing and testing a method for preliminary visual research“. Thesis, London Metropolitan University, 2017. http://repository.londonmet.ac.uk/1471/.

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Approaching a new design project by performing preliminary visual research is a common practice in educational and studio settings, particularly in Jewellery and Fashion Design. Collecting images around a given subject or theme - for better understanding its visual traits, or for future reference - could be seen as the counterpart, in visual terms, of a literature search. However, ‘visual research’ is an expression often used rather vaguely for indicating a spectrum of unstructured methodological approaches, whose procedures and underlying assumptions tend to remain unexplained, undisclosed or unquestioned in everyday studio practice. When creative practice becomes an integral part of academic research, though, there is an increased need for rigor and explicitness regarding every aspect about it, including all the work preliminary to it. This research aims to develop and test a systematic method for conducting and documenting visual research in the preliminary stages of the design process, contributing to new knowledge in the form of a new visual method, also applicable as a design tool. A reflection on the vagueness and implicitness of the Intuitive Approach (IA) to visual research adopted in the initial stage of this PhD motivated the search for an alternative method that could make transparent and rigorous the taken-for-granted, subjective assumptions behind the research initially conducted. The iterative and data-driven nature of the IA oriented the methodological quest towards established qualitative approaches in the Social Sciences, focusing on Emergent Methods and Grounded Theory. By translating and adapting some of their procedures to suit a visual context, a new method, Grounded Visual Analysis (GVA), has been developed and tested, revealing its suitability for achieving a higher degree of explicitness and systematicity in the process of data collection and analysis, and increasing the richness of the visual patterns elicited from the data, thus their potential for stimulating reflective practice. The development of GVA is offered as the major contribution to knowledge of this research, together with its application on a practical case as the demonstration of its double functioning, either as a reflective method for conducting visual research in the preparatory phase of the design process, and as a design tool for stimulating the generation of new ideas and design briefs.

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Sun, Liming. „Interior point based continuous methods for linear programming“. HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1414.

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Al, Marhoon Hussain Hassan. „A Practical Method for Power Systems Transient Stability and Security“. ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/114.

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Stability analysis methods may be categorized by two major stability analysis methods: small-signal stability and transient stability analyses. Transient stability methods are further categorized into two major categories: numerical methods based on numerical integration, and direct methods. The purpose of this thesis is to study and investigate transient stability analysis using a combination of step-by-step and direct methods using Equal Area Criterion. The proposed method is extended for transient stability analysis of multi machine power systems. The proposed method calculates the potential and kinetic energies for all machines in a power system and then compares the largest group of kinetic energies to the smallest groups of potential energies. A decision based on the comparison can be made to determine stability of the power system. The proposed method is used to simulate the IEEE 39 Bus system to verify its effectiveness by comparison to the results obtained by pure numerical methods.

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MacLeod, Alasdair Breac. „Development of methods to predict the discharge capacity in model and prototype meandering compound channels“. Thesis, University of Glasgow, 1997. http://theses.gla.ac.uk/1461/.

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The author developed two methods for predicting the discharge capacity of uniform meandering compound channels. The first method utilised an Artificial Neural Network (ANN) functional approximator which was taught to replicate the relationship between 9 of the key parameters and the magnitude of F* which was exhibited by the flow data gathered during the Series B extension (1993-1996) programme. The ANN approximator was constructed using a 'Matlab' software environment and was supported on a PC. The second method consisted of a semi-physical / semi-empirical method which was named the Enhanced zonal method. This method comprised formulations which explicitly determined the discharge capacity of the 3 individual flow zones in meandering compound channels whilst accounting for difference induced by the characteristic 4 flow region behaviour. The author demonstrated that both of these methods produce more accurate discharge capacity predictions than the James and Wark [1] [1992] method for the majority of available flow data sets. The James and Wark [1] [1992] method was the optimal method prior to the Series B extension (1993-1996) programme. The ANN approximator gave the most accurate predictions when the parameters of the compound channels to which it was applied fell within the range of the parameters incorporated in the ANN training data set. However, the author demonstrated that the Enhanced zonal method is the most reliable discharge capacity prediction method over the full range of uniform meandering compound channel configurations. The author developed two refined one-dimensional (1D) numerical models (for application to both steady and unsteady flow conditions) which incorporated the Ackers [1991] and James and Wark [1] [1992] methods to determine the conveyance characteristics at representative uniform cross-sections in natural meandering compound channels. The author demonstrated, using a case study of the River Dane, that these refined 1D models were able to predict the water surface profiles in natural channels to a high degree of accuracy.

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Werner, Liane. „Modelagem dos tempos de falhas ao longo do calendário“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1996. http://hdl.handle.net/10183/1451.

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Um dos modos de avaliar a confiabilidade de um produto é verificando o comportamento das falhas em testes de uso contínuo. Contudo, essa informação não permite saber em que data a falha ocorrerá. Para resolver esse impasse abordamos na presente dissertação a modelagem dos tempos de falha ao longo do calendário. A modelagem desses tempos permite uma melhor administração do sistema de garantia e assistência técnica, além de possibilitar a empresa estimar e monitorar a confiabilidade do produto. Para proceder com a modelagem, é preciso, inicialmente, conhecer a distribuição de três variáveis: o tempo de vida do produto, em horas de uso contínuo; o tempo de uso do produto, em horas por dia; e o intervalo de tempo entre a manufatura e a venda, em dias. Conhecendo o comportamento dessa variáveis duas alternativas de solução são apresentadas: (a) Modelagem via simulação de Monte Carlo e (b) Modelagem através de solução matemática fechada. São discutidos os casos em que há um ou vários grupos de clientes que utilizam o produto.
One ways to evaluate the reliability of some product is to verify the behavior of the fails in tests of continuous use. Nevertheless, this information doesn’t allow to know in what date the fail will occur. To solve this impasse, in the present dissertation we approach the modeling of the fails time along the calendar. The modeling of these times allow a better administration of the guarantee’s system and technical maintenance, as well as to provide to the company to estimate and monitorize the reliability of the product. To proceed with the modeling it’s necessary, first of all, to know the distribution of three variables, the product lifetime, in hours of continuous use; the time of product’s use, in hours per day, and the interval of time between the manufacture and the sale, in days. Knowing the behavior of these variables, two alternatives of solution are presented: (a) modeling through Monte Carlo’s simulation and (b) modeling through closed mathematical solution. The cases in what there are one or several groups of customers who make use of the product are discussed.

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Kang, Bu Byoung. „Excitation method for thermosonic non-destructive testing“. Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/1411.

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Thermosonics is a non-destructive testing method in which cracks in an object are made visible through the local generation of heat caused by friction and/or stress concentration. The heat is generated through the dissipation of mechanical energy at the crack interfaces by vibration. The temperature rise around the area close to the crack is measured by a high-sensitivity infrared imaging camera whose field of view covers a large area. The method therefore covers a large area from a single excitation position so it can provide a rapid and convenient inspection technique for structures with complex geometry and small and closed cracks. An ultrasonic horn, originally designed for welding, has generally been used for thermosonic testing. However, it is diffcult to obtain reproducible and controllable excitation with the existing horn system because of non-linearity in the coupling; surface damage can also be produced by chattering caused by loss of contact between the tip of the horn and the structure. Therefore, the general aim of the study was to develop a reliable and convenient excitation method that should excite sufficient vibration for the detection of the defects of interest at all relevant positions in the structure and must also avoid surface damage. In this thesis, a numerical and experimental study for the development of the ex- citation method for reliable thermosonic testing is presented. Successful excitation methods for the detection of delaminations in composites and cracks in metal struc- tures are described. A simple, small wax-coupled PZT exciter is introduced as a con- venient, reliable thermosonic test system in applications where relatively low strain levels are required for damage detection such as composite plates. A reproducible vibration exciter may be su cient for thermosonic testing in some metal structures such as a thin plates. However, higher strain levels are often required in metal structures, though the required strain level is dependent on the crack size. This level of strain is not easily achieved within the reproducible vibration range because of non-linearity in the contact between the exciter and the structure. Therefore, studies are conducted with an acoustic horn with high power capability to investi- gate the characteristics of the vibration produced in a real structure with complex geometry and to develop a excitation method for achieving reliable excitation in the non-linear vibration range for thermosonic testing. An excitation method for a complicated metallic structure such as a turbine blade is also investigated and the in uence of the clamping method and the excitation signal that is input to the horn on the vibration characteristics generated in the testpiece is presented. As a result, a fast narrow band sweep test with a general purpose amplifier and stud coupling is proposed as an excitation method for thermosonic testing. This method can be ap- plied to different types of turbine blades and also to other components. One typical characteristic of a thermosonic test using non-linear vibration is the lack of repeata- bility in the amplitude and the frequency characteristic of the vibration. Therefore, vibration monitoring is necessary for reliable thermosonic testing and a Heating In- dex(HI) has been proposed as a criterion indicating whether su cient vibration is achieved in a tested structure or not. The HI is calculated from different vibration records measured by different sensors and these results are compared in this thesis. A microphone can provide a cheaper and more convenient non-contacting vibration monitoring device than a laser or strain gauge and the heating index calculated by a microphone signal shows similar characteristics to that calculated from the other sensors.

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Graham, David James. „Investigation of methods for data communication and power delivery through metals“. Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1414.

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The retrieval of data from a sensor, enclosed by a metallic structure, such as a naval vessel, pipeline or nuclear flask is often very challenging. To maintain structural integrity it is not desirable to penetrate the wall of the structure, preventing any hard-wired solution. Furthermore, the conductive nature of the structure prevents the use of radio communications. Applications involving sealed containers also have a requirement for power delivery, as the periodic changing of batteries is not possible. Ultrasound has previously been identified as an attractive approach but there are two key challenges: efficient/reliable ultrasonic transduction and a method of overcoming the inherent multipath distortion resulting from boundary reflections. Previous studies have utilised piezoelectric contact transducers, however, they are impractical due to their reliance on coupling, i.e. the bond between the transducer and the metal surface, which leads to concerns over long term reliability. A non-contact transducer overcomes this key drawback, thus highlighting the electromagnetic acoustic transducer (EMAT) as a favourable alternative. This thesis presents the design and testing of an EMAT with appropriate characteristics for through-metal data communications. A low cost, low power data transmission scheme is presented for overcoming acoustic multipath based on pulse position modulation (PPM). Due to the necessary guard time, the data rate is limited to 50kbps. A second solution is presented employing continuous wave, Quadrature phase shift keying (QPSK) modulation, allowing data rates in excess of 1Mbps to be achieved. Equalisation is required to avoid intersymbol interference (ISI) and a decision feedback equaliser (DFE) is shown to be adept at mitigating this effect. The relatively low efficiency of an EMAT makes it unsuitable for power delivery, consequently, an alternative non-contact approach, utilising inductive coupling, is explored. Power transfer efficiency of ≈ 4% is shown to be achievable through 20mm thick stainless steel.

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Lamsal, Sunil. „COMPARING THREE ESTIMATION METHODS FOR THE THREE-PARAMETER LOGISTIC IRT MODEL“. OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/1141.

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AN ABSTRACT OF THE DISSERTATION OF SUNIL LAMSAL, for the Doctor of Philosophy degree in QUANTITATIVE METHODS, presented on 10/30/2015, at Southern Illinois University Carbondale. TITLE: COMPARING THREE ESTIMATION METHODS FOR THE THREE-PARAMETER LOGISTIC IRT MODEL MAJOR PROFESSOR: Dr. Yanyan Sheng Different estimation procedures have been developed for the unidimensional three‐parameter item response theory (IRT) model. These techniques include the marginal maximum likelihood estimation, the fully Bayesian estimation using Markov chain Monte Carlo simulation techniques, and the Metropolis-Hastings Robbin-Monro estimation. With each technique, a prior can be specified to reflect prior belief on each model parameter. Previous studies evaluating the fully Bayesian estimation procedure for this model suggests that the model can be viewed as a mixture model, and it suffers from a non-convergence problem unless strong informative priors are specified for the item slope and intercept parameters. This study focused on comparing the three estimation methods for the three-parameter logistic (3PL) model in parameter estimation using Monte Carlo simulations. In particular, sample sizes, test lengths, prior specifications and actual item parameters were manipulated to reflect various test situations. The results suggest that: 1) all three estimation methods performed differently under different simulation conditions, 2) the three methods performed better when the actual parameters are close to their prior mean or mode than when the actual parameters are close to their boundary values, 3) a relatively more informative prior had to be specified for item parameters to ensure convergence with each of the three methods and the item parameters were more accurately estimated.

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Brake, Jeffrey Scott. „Locating Optimal Water Quality Monitoring Locations Using Demand Coverage Index Method“. DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1421.

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Water quality regulations are always expanding especially in the field of water quality monitoring; however, threats to our water distribution systems still remain. Components of water distribution systems are susceptible to intentional and accidental contamination; therefore, they represent highly vulnerable aspects of our vital infrastructure. An analysis was performed on a city in California with a population of 30,000 to 40,000 residents. The analysis is performed to determine the optimal locations of monitoring stations throughout the water distribution system. The method presented by Liu and colleagues (Liu et al, 2012) selects the optimal monitoring locations for the virtual California city using the Demand Coverage Index (DCI) method. In order to study small scale systems which are typically more vulnerable to tampering, the method attempts to use the virtual city to show the effectiveness of the DCI method and how it can be implemented on smaller water distribution systems (WDS). The analysis results lay out a number of monitoring stations that should be used to prevent a large scale contamination event from occurring. The number of monitoring stations will vary depending on funding for water infrastructure and coverage requirements. The results represent an outline for improving the effectiveness of the monitoring capabilities in the WDS. The monitoring stations increase the resilience of the WDS from potential terrorist sabotage and mitigate potential outbreaks due to microorganisms, pipeline leaks, or hazardous chemicals entering the WDS.

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Ng, Chi Kong. „Globally convergent and efficient methods for unconstrained discrete-time optimal control“. HKBU Institutional Repository, 1998. http://repository.hkbu.edu.hk/etd_ra/149.

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Woodhouse, Iain Hector. „A comparison of retrieval methods using data from the microwave limb sounder“. Thesis, Heriot-Watt University, 1994. http://hdl.handle.net/10399/1341.

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Dykast, Ondřej. „Mezipodnikové srovnávání poskytovatelů telekomunikačních služeb v ČR a SR“. Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-1416.

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Diplomová práce se zabývá mezipodnikovým srovnáváním firem působících v oboru telekomunikací v České republice a na Slovensku v letech 2001 - 2005. Porovnávání podniků probíhá na základě nástrojů finanční analýzy. Samotné hodnocení je prováděno dle čtyřech základních metod mezipodnikového srovnávání a navíc pomocí grafické spider analýzy. V závěru jsou uvedené veškeré problémy, které musely být řešeny, a navrhnuté celkové pořadí firem za rok 2005.

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Tang, Zhihui. „Fast transforms based on structured matrices with applications to the fast multipole method“. College Park, Md. : University of Maryland, 2003. http://hdl.handle.net/1903/142.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2003.
Thesis research directed by: Applied Mathematics and Scientific Computation Program. 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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Taylor, Kevin Curtis. „Did the Buddha Have a Method? Exploring Pedagogical Aspects of the Buddha's Teaching“. OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/145.

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In this thesis I explore aspects of the Buddha Gotama as a teacher. I begin by analyzing the nature of the Buddha's enlightenment and his state of mind as presented by various accounts. The chapter reconciles his decision to teach by means of Buddhist epistemology and gives an account of the difficulty of learning the Buddhadhamma. In chapter two I give three examples of the Buddha teaching individual students about the dhamma to show how he approaches each scenario differently depending on the needs of the student. Finally I give an account of William James' pragmatic method in an effort to show how the Buddha's teaching is pragmatic as a method for solving an existential crisis.

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Voorheis, Grace. „Dialogue education is effective as a method to teach maternal toddler feeding practices“. DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1431.

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Title: Dialogue education is effective as a method to teach maternal toddler feeding practices Objectives: 1) Measure the effectiveness of one or two workshops using dialogue education to teach healthy toddler feeding practices, specifically a) to allow child self-regulation of satiety, b) to maintain a schedule for meals and snacks and c) to role-model healthy eating when compared to a control group. 2) Measure the effectiveness of dialogue education to teach appropriate stages of growth in order to increase mothers’ ability to know when their children are at a healthy weight compared to a control group 3)Compare baseline maternal toddler feeding practices between low-income Latina mothers participating in Early Head Start (EHS) and Early Migrant/Seasonal Head Start (EMSHS). Methods: Sixty six mothers participating in EHS (n=25 and EMSHS (n=41) completed a 24 item Likert scale (1 to 5 with 1=Never/Not confident/Extremely unlikely, 5=Always/Very confident/Extremely likely) to assess behavior, self-efficacy and intent regarding 3 domains of toddler feeding practice: self-regulation of hunger and satiety, scheduling meals and snacks, and parental role modeling. Mean Likert scores for each question were analyzed by subgroup. A two-part educational intervention was developed to improve these three domains of healthy toddler feeding practices and knowledge of stages of growth. Participants were recruited primarily from EMSHS and were grouped based on level of participation (1 workshop, 2 workshops or control). Results: Objective one:One-way ANOVA analysis showed improvement from baseline to post-intervention for self-regulation (baseline x=3.130 0.499; post-intervention x=3.496 0.603; p=0.030) and role-modeling behavior (baseline x=3.757 ; post-intervention x=4.096 0.581, n=23, p=0.035) for those who participated in one or two workshops. Two-sample t-tests of post-intervention scores between control and a combined intervention group (Group 1 and Group 2) showed that the combined group scored significantly higher in allowing self-regulation behavior (control x=3.036 , n=11; combined intervention group x=3.496 0.603, n=23, p=0.016). Regression showed that intent (p=0.03) and self-efficacy (p Objective two: No significant changes in self-efficacy or knowledge of stages of growth were observed among the three treatment groups. Perceptions of healthy weight did not change significantly from baseline to post-intervention. Objective three: Mothers in EHS and EMSHS groups were similar for the most part in their parental feeding practices. The EMSHS mothers maintained a schedule for meals and snacks more than EHS mothers (EMSHS x=3.323 , n=41, EHS x=2.850 , n=25; p=0.004). The EHS mothers, however, limited sweets more frequently than EMSHS mothers (EMSHS x=3.28 , n=41, EHS x=2.66 , n=25; p=0.024). Levels of self-efficacy and intent were similar for both groups, with EHS mothers scoring higher for confidence in staying calm during stressful meal times (EHS x=3.24 , n=25; EMSHS x=2.56 , n=41; p-value=0.004) and intent to allow self-regulation (EHS x=4.125 , n=8; EMSHS x=3.532 , n=25; p-value=0.068). Early Head Start mothers also identified the importance of exercise in maintaining a healthy weight significantly more than EMSHS mothers (p=0.031). Conclusion: Dialogue education is effective as a method to improve some aspects of authoritative feeding behavior. One workshop was sufficient to observe improvements in self-regulation and role-modeling behavior. No improvements were observed in self-efficacy or knowledge of healthy weights. While similar for the most part, EHS mothers are more authoritative in their feeding practices compared to EMSHS. Keywords: Toddlers, Head Start, Division of Responsibility, Dialogue Education

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Fluty, Wesley. „FAULT LOCATION TECHNIQUES USING THE TRAVELING WAVE METHOD AND THE DISCRETE WAVELET TRANSFORM“. UKnowledge, 2019. https://uknowledge.uky.edu/ece_etds/146.

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Fault location within electric power systems is an important topic that helps reduce outage duration and increases reliability of the system. This paper explores the topic of fault location using traveling waves generated by fault conditions and the discrete wavelet transform used for time-frequency analysis. The single-ended and double-ended traveling wave methods are presented and evaluated on a single circuit and double circuit 500kV system modeled using MATLAB SIMULINK. Results are compared on the basis of wavelet used for analysis, sampling rate, and fault resistance.

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Roden, Brett. „Investigating the Effects of Anthelmintic Compounds at the Site of Zinc Potentiation on Alpha4Beta4 Neuronal Nicotinic Acetylcholine Receptors“. Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_theses/149.

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Neuronal nicotinic acetylcholine receptors can have their function modulated by zinc. Depending on concentration and subunit composition, zinc either inhibits or potentiates receptor function. The zinc ion potentiates the alpha4beta4 receptor at non-agonist binding interfaces or "pseudo sites." Zinc potentiation is reduced if certain residues are mutated or spatially interfered with. The residue contributing most to this potentiation reduction effect is histidine 162 on the alpha4 subunit. The anthelmintic compound levamisole potentiates acetylcholine response of certain neuronal nicotinic receptors. Levamisole and its functional analogues morantel, oxantel, and pyrantel all were found to potentiate alpha4beta4 receptors at low (µM) concentrations and inhibit them at high (mM) concentrations. Oxantel showed the greatest degree of potentiation, about a third of the maximal zinc potentiation measured. Oxantel was screened using the substituted cysteine accessibility method (SCAM) against the residue histidine 162 as well as nearby alpha4 residues histidine 61 and glutamate 59 and the beta4 residue aspartate 195. Screening was carried out by mutating said residues into cysteine, followed by covalent linkage with a disulfide bridge of that residue with a methanethiosulfonate compound. SCAM experiments allowed testing of the effects of a single residue and the area immediately adjacent to it. Receptors that lost zinc potentiation capacity from site-directed mutagenesis at the his 162 residue and subsequent methanethiosulfonate reaction still showed regular potentiation following oxantel treatment. Although these compounds exhibit similar biphasic potentiation dose-response curves as zinc, their mechanism for potentiation is not through the same mechanism.

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Beutel, Dan. „Modelling Advection and Diffusion in Microchannels“. Scholarship @ Claremont, 2003. https://scholarship.claremont.edu/hmc_theses/140.

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This project will investigate mixing in microchannels. Specifically, the advection and diffusion of a passive scalar, using a split step Monte Carlo method. Numerically the implementation of this method is well understood. The current experimental geometry is a rectangular pipe with grooves on one wall. Mixing results with straight walls agree closely with experiment. The velocity field over grooves is also studied.

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Guercio, Remy. „Exploring Radio Frequency Positioning Methods and Their Use in Determining User Context in Public Spaces“. Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/cmc_theses/1441.

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RF positioning methods have various tradeoﬀs that make them suitable for diﬀering applications. This thesis identiﬁes the most prominent positioning methods and deter-mines their suitability for context aware applications in pub-lic spaces using a number of diﬀerent factors. This thesis ﬁrst explores the physical characteristics of GPS, GSM, 802.11 and Bluetooth focusing on coverage and accuracy in both a historical and forward looking context. Next, it explores what it means for an application to be context aware and how that translates into building applications that are used in the context of public places. This thesis then reﬂects on the intersection of the two and explores some challenges related to practical implementations. In order to further explore these challenges, it assesses a high accuracy use case of merging Bluetooth positioning with augmented reality and virtual reality applications. We ﬁnd that in the last decade Bluetooth has made rapid advancements in relation to competing technologies, but it is still far from ideal in all situations, especially when the situation requires extremely high accuracy.

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Larsson, Susanne, und Anne-Louise Sjöblom. „Hur första linjens chefer inom äldreomsorgen beskriver sitt ledarskap“. Thesis, Högskolan i Borås, Akademin för vård, arbetsliv och välfärd, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-114.

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I takt med att samhället och hälso- och sjukvården förändras torde det vara så att ledare ständigt hanterar minskade resurser som kan påverka arbetsförhållanden. I en tid då behovet av engagerade medarbetare är som störst, är arbetsmiljön en viktig faktor. Ledarnas förhållningssätt och handlingar påverkas av förväntningar, krav och faktiska förhållanden på arbetet. Ledarskapet måste anpassas och vara flexibelt för att kunna möta situationer som uppstår på arbetsplatsen. Syftet med studien är att undersöka hur första linjens chefer inom äldreomsorgen beskriver sitt ledarskap. En kvalitativ ansats med semistrukturerade intervjuer har valts. I intervjuerna utkristalliserade sig sju kategorier: omsorg om medarbetarna, tillit till medarbetarna, öppet tillåtande klimat för medarbetarna, bekräfta medarbetarna, skapa delaktighet för medarbetarna, ge möjligheter till kompetens för medarbetarna och tydlig styrning i verksamheten för medarbetarna. Materialet analyserades och bearbetades. Materialet i studien var med en geografisk spridning med sex chefer från båda könen i åldrarna 30 till 58 år. Respondenterna har ansvar för olika verksamhetsområden inom äldreomsorgen. Respondenternas svar överraskade då författarnas erfarenhet är att många chefer idag inte alltid har förutsättningar att kunna vara närvarande hos medarbetarna på arbetsplatsen. Första linjens chefer inom äldreomsorgen beskriver sitt ledarskap att vara närvarande, att stimulera medarbetarna och att inge förtroende.

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Goldfarb, David Martin. „METHODS AND OBSERVATIONS FOR THE INFLUENCE OF TEMPERATURE ON VOLATILE LOSS FROM WINE FERMENTATION“. DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1471.

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Background and Aims: Volatile loss of carbon dioxide, ethanol, esters and other compounds occurs during wine fermentation. When collected nondestructively, valuable ethanol and aroma compounds can be preserved for various uses while mitigating production restrictions and regulations regarding volatile organic compound (VOC) loss from wine production. Knowledge of the volume of volatiles lost during wine fermentation contributes to a better understanding of the magnitude of possibilities for resource recovery/aroma recovery, the implications of volatile loss on wine composition as well as a more clear understanding of the possible effect of alcoholic fermentation on air quality. The aim of this study was to contribute to a better understanding of how the loss of volatiles from wine fermentation varies with temperature. Methods and Results: Temperature controlled microscale fermenters were developed and infrared detection technology was adapted to study the effect of temperature on volatile loss. Results are presented for the rates and volumes of volatile loss from the fermentation of California Syrah at constant temperatures (17, 23, 27, 33˚C) in 1.9L containers. Observed volatile losses are compared to theoretical losses based on kinetic and stoichiometric principals. Each ferment started with 1200g of fruit and was adjusted to 23.5˚B. Following Brix adjustment, final volumes ranged from 1129.16mL to 1160.10mL. Conclusion: The loss of VOC from fermentation increases exponentially with temperature. Total VOC and CO2 loss appears to be slightly less than theory predicts. Significance of the Study: A significant loss of compounds occurs during wine fermentation. Commercial and environmental benefits may be achieved if efforts are made to recover and make use of these otherwise wasted compounds. Funding provided by the Agricultural Research Initiative, California State University.

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Watt, James Penn. „A Highly Abstracted Method of FPGA-Based Development for Secondary Surveillance Radar Transpond Detection“. DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/148.

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Traditional FPGA-based digital design is based on writing hardware definition language (HDL) code from scratch. Time to market, cost of development, and the level of training required for designers all can be reduced with a simplified and abstracted design strategy. This project intends to demonstrate a graphical user interface (GUI) layer of abstraction on top of existing commercially produced design aids including MATLAB, Simulink, and Xilinx System Generator. This project performs and demonstrates a specific implementation example of a Secondary Surveillance Radar (SSR) message decoder as proof-of-concept for the abstracted design method. The abstracted digital design methods shown in this project can be adapted for use in other areas of development and research including digital signal processing and communications.

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Gong, Guobin. „DEM [Discrete Element Method] simulations of drained and undrained behaviour“. Thesis, University of Birmingham, 2008. http://etheses.bham.ac.uk//id/eprint/143/.

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This thesis reports the results of DEM (Discrete Element Method) simulations of the behaviour of granular material for axisymmetric compression and plane strain deformation under both drained and undrained conditions. The aim is to study the behaviour of saturated granular material using DEM and the objectives of this thesis are: • to explore the drained behaviour of granular material using DEM • to explore the undrained behaviour of loose samples of granular material with and without preshearing history, using DEM • to compare axisymmetric compression and plane strain behaviour of a granular material under both drained and undrained conditions, using DEM A servo-control mode with constant mean stress is used to model drained simulations, and a strain-control model with constant volume is used to model undrained simulations. A periodic cell is used for all the simulations. For the drained simulations, the results of both dense and loose systems are presented, and all the systems reach a unique critical state at large strains. For the undrained simulations, mainly the results of loose systems are presented. The influence of preshearing history is also examined for a loose system under undrained axisymmetric compression conditions. The concept of liquefaction is shown to strongly correlate with mechanical coordination number, and liquefaction is shown to be related to structural mechanism. An attempt has been made to compare the axisymmetric compression and plane strain deformation for the drained and undrained conditions respectively. Shear strength criteria are examined and the Lade criterion is shown to be the most appropriate failure criterion.

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Grover, Sean Thomas Stern Laura Ikins. „A Tuscan lawyer, his farms and his family the ledger of Andrea Di Gherardo Casoli, 1387-1412 /“. [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/permalink/meta-dc-11041.

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MEDEIROS, ILCA M. M. A. „Espectroscopia gama no nucleo sup(149) Nd“. reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10961.

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Made available in DSpace on 2014-10-09T12:46:08Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:02:07Z (GMT). No. of bitstreams: 1 07612.pdf: 5577228 bytes, checksum: 86856f19b569f944e37500784558338a (MD5)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Lightcap, Andrew. „Minimum Degree Conditions for Tilings in Graphs and Hypergraphs“. Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/math_theses/111.

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We consider tiling problems for graphs and hypergraphs. For two graphs and , an -tiling of is a subgraph of consisting of only vertex disjoint copies of . By using the absorbing method, we give a short proof that in a balanced tripartite graph , if every vertex is adjacent to of the vertices in each of the other vertex partitions, then has a -tiling. Previously, Magyar and Martin [11] proved the same result (without ) by using the Regularity Lemma. In a 3-uniform hypergraph , let denote the minimum number of edges that contain for all pairs of vertices. We show that if , there exists a -tiling that misses at most vertices of . On the other hand, we show that there exist hypergraphs such that and does not have a perfect -tiling. These extend the results of Pikhurko [12] on -tilings.

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Massman, Jeffrey. „NUMERICAL FLOW FIELD ANALYSIS OF AN AIR AUGMENTED ROCKET USING THE AXISYMMETRIC METHOD OF CHARACTERISTICS“. DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1141.

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An Axisymmetric Rocket Ejector Simulation (ARES) was developed to numerically analyze various configurations of an air augmented rocket. Primary and secondary flow field visualizations are presented and performance predictions are tabulated. A parametric study on ejector geometry is obtained following a validation of the flow fields and performance values. The primary flow is calculated using a quasi-2D, irrotational Method of Characteristics and the secondary flow is found using isentropic relations. Primary calculations begin at the throat and extend through the nozzle to the location of the first Mach Disk. Combustion properties are tabulated before analysis to allow for propellant property selection. Secondary flow calculations employ the previously calculated plume boundary and ejector geometry to form an isentropic solution. Primary and secondary flow computations are iterated along the new pressure distributions established by the 1D analysis until a convergence tolerance is met. Thrust augmentation and Specific Impulse values are predicted using a control volume approach. For the validation test cases, the nozzle characteristic net is very similar to that of previous research. Plume characteristics are in good agreement but fluctuate in accuracy due to flow structure formulation. The individual unit processes utilized by the Method of Characteristics are found to vary their outputs by up to 0.025% when compared to existing sources. Rocket thrust and specific impulse are increased by up to 22% for a static system and 15% for an ejector flow at Mach 0.5. Evidence of Fabri conditions were observed in the flow visualization and graphically through the performance predictions. It was determined that the optimum ejector divergence angle for an air augmented rocket greatly depends on the stagnation pressure ratio between the primary and secondary flows.

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Zora, Jandrić. „Razvoj hromatografskih metoda za simultano određivanje tropanskih alkaloida i glikoalkaloida i praćenje apsorpcije i translokacije atropina 14C u pšenici“. Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2011. https://www.cris.uns.ac.rs/record.jsf?recordId=76985&source=NDLTD&language=en.

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U okviru doktorske disertacije su razvijeni i optimizovani postupci pripreme uzoraka hrane (žitarica, sirovina, poluproizvoda i prehrambenih proizvoda na bazi žitarica, voća i povrća) i stočne hrane, kao i simultano određivanje tropanskih i glikoalkaloida primenom gasne i tečne hromatografije uz maseno-spektrometrijsku detekciju. Razdvajanje alkaloida primenom gasne hromatografije je izvedeno na kapilarnoj koloni (HP-5MS UI), uz detekciju sa kvadrupolnom masenom spektrometrijom SIM tehnikom, u intervalu m/z 50–550 a.m.u. Pri optimizovanim uslovima postignuto je razdvajanje homatropina, atropina i skopolamina u vremenu od 12.75 min, pri čemutropin i anisodamin nisu mogli biti detektovani. Glikoalkaloidi nisu direktno mogli biti određivani gasnom hromatografijom usled njihove visoke molekulske mase i male isparljivosti. Za simultano određivanje tropanskih alkaloida (tropin, l-hiosciamin, atropin, skopolamin, homatropin i anisodamin) i glikoalkaloida (α-solanin i α-kakonin) validirana je brza i osetljiva multirezidualna LC–MS/MS metoda. Korišćena je disperzivna čvrsto-fazna ekstrakcija sa 0.5% mravlje kiseline u acotonitrilu/vodi (75:25, v/v), solima magnezijum sulfat, natrijum hlorid i natrijum citrat kao i C₁₈ sorbent. Analiti su razdvojeni na Chirobiotic V koloni, sa mobilnom fazom sastavljenom od 10 mM amonijum formata u voda/acetonitril (90:10, v/v) i metanol/acetonitril (50:50, v/v), mešanim u odnosu 20:80 (v/v). Detekcija komponenti je izvedena u pozitivnom elektrosprej modu (ESI+), korišćenjem reakcionog višestrukog monitoring akvizacionog moda (MRM). Optimizovana tečno hromatografska metoda je podrazumevala brz i jednostavan proces ekstrakcije, sa prinosom od 61-111% za pojedine alkaloide, dobru linearnost u širokom opsegu (5-80 μg/kg, r²=0.998), dobru selektivnost, robusnost i preciznost (CV < 5%). Granica detekcije (LOD) za sve alkaloide je bila u opsegu od 0.74 do 0.79 ng/g dok se granica kvantifikacije (LOQ) kretala od 2.17 do 2.46 ng/g u svim žitaricama, izuzev za tropin u soji i lanenom semenu (LOD = 1.55 i LOQ = 4.91 ng/g). Pri analizi uzoraka sa tržišta alkaloidi nisu detektovani u analiziranim uzorcima hrane, kao što su: pšenica, raž, kukuruz, brašno od mešanih žitarica, kukuruzno brašno, biskvit i krekeri. Stočna hrana namenjena ishrani svinja i peradi je sadržala atropin, skopolamin, α-solanin i α-kakonin u koncentracionom opsegu od 3.6 do 21.7 ng/g. Atropin i skopolamin su detektovani u koncentracionom opsegu od 2.8 do 9.8 ng/g u hrani namenjenoj ishrani krava i zečeva, dok u hrani nemenjenoj ishrani konja i divljih životinja alkaloidi nisu detektovani. U analiziranim uzorcima voća i povrća (jabuka, kruška, avokado, mrkva, krastvac i paprika) po prvi put u ovom radu su detektovani glikoalkaloidi, α-solanin i α-kakonin. Koncentracija oba glikoalkaloida se kretala u opsegu od 0.3 do 15 ng/g. Sadržaj glikoalkaloida u krompiru i čipsu (8708.9-18794.7 ng/g) se nalazio u okviru preporučenog ukupnog sadržaja glikoalkaloida od 200 mg/kg (sirova odvaga) (FAO/WHO, 1999). Apsorpcija i translokacija alkaloida od strane pšenice u koren, listove i stabljiku je ustanovljena upotrebom atropina ¹⁴C. Utvrđeno je da biljka nakon 15 dana apsorbuje 4.30% i 2.28% atropina ¹⁴C za niži (13676 dpm/g soil) i viši (37203 dpm/g soil) sadržaj standarda sa kojim je zemljište spajkovano, redom. Količina apsorbovanog atropina se smanjivala tokom rasta biljke. Biljka starosti 90 dana je apsorbovala 0.38% i 0.21% atropina ¹⁴C za niži i viši sadržaj standarda, redom. Povećanje koncentracije supstance u zemljištu nije uticalo na dalje povećanje apsorpcije. Do nagomilavanja supstance je došlo u listovima (83%) dok su niže koncentracije zabilježene u korenu (8.6%), stabljici (4.2%) i semenu (4.1%). U analiziranim uzorcima vode, koja je poticala od ispiranja zemljišta obogaćenog atropinom ¹⁴C, nakon 30 dana supstanca je detektovana u koncentraciji od 0.5%. Tokom vremena je ustanovljeno smanjenje ispiranja ove supstance (0.01% nakon 90 dana). Analiza uzoraka zemljišta nakon 30 i 60 dana je pokazala značajne adsorpcione osobine atropina, tako da je količina čvrsto adsorbovanog (neekstrahovanog) atropina iznosila 60% i 70%, redom. Zaostali atropin je bio stabilan i nakon 90 dana.
The methods of sample preparation have been developed and optimized for food (grains, raw materials, food products based on grains and fruits and vegetables) and feed analyses for the purpose of simultaneous determination of tropane and glycoalkaloids by gas and liquid chromatography hyphenated to mass spectrometry. Separation of alkaloids by gas chromatography was achieved by using capillary column HP-5MS UI. The alkaloids have been detected by using a quadrupole mass spectrometer inSIM mode for the range of m/z 50–550 a.m.u. Under optimised conditions, good separation of homatropine, atropine and scopolamine was achieved after 12.75 min, while tropine and anisodamine couldn`t be detected. Glycoalkaloids could not be analysed directly by gas chromatography due to their high molecular weight and low volatility. For simultaneous determination of tropane alkaloids (tropine, atropine, scopolamine, homatropine, anisodamine) and glycoalkaloids (α-solanine, α-chaconine) fast and sensitive multiresidue LC–MS/MS method was validated. In sample preparation dispersive solid phase extraction (DSPE) was performed with 0.5% formic acid in acetonitrile/water (75:25, v/v) and a mixture of magnesium sulphate, sodium chloride, sodium citrate and C18 sorbent. The analytes were separated by isocratic HPLC on a Chirobiotic V column with the mobile phase that consisted of 10 mM ammonium formate in water/acetonitrile (90:10, v/v) and methanol/acetonitrile (50:50, v/v), mixed in the ratio of 20:80 (v/v).Compounds were detected in positive electrospray ionization mode (ESI+), using multi reaction monitoring (MRM). Optimised liquid-chromatographic method exhibited good linearity in the range 5-80 ng/g (r²=0.998). The method has shown to be specific, selective, accurate (recoveries from 61- 111%), precise (CV < 5%) and rugged. Calculated limits of detection (LOD) for all alkaloids were in the range 0.74-0.79 ng/g, while the limits of quantitation (LOQ) were in the range 2.2-4.9 ng/g in all grains, except for tropine in soybean and linseed (LOD = 1.55 and LOQ = 4.91 ng/g). The proposed method was applied in the analyses of samples obtained from local supermarkets. The alkaloids were not detected in following food samples:wheat, rye, maize, mixed grain flour, corn flour, biscuits and crackers. The feeds for pigs and chicken were the most contaminated with atropine, scopolamine, α-solanine and α-chaconine with the contents of alkaloids in the range of 3.6 to 21.7 ng/g. Atropine and scopolamine were detected in cattle and rabbit feed in concentrations ranging from 2.8 to 9.8 ng/g, while in feed for horses and wild animals none of the target alkaloids were detected. Conducted research reports for the first time the presence of glycoalkaloids, α-solanine and α-chaconine in fruit and vegetable samples (apple, pear, avocado, carrot, cucumber and paprika). The concentrations of these alkaloids were in the range of 0.3 to 15 ng/g. The content of glycoalkaloids in potato and chips complied with the recommended content of total glycoalkaloids concentration of 200 mg/kg (raw weight) (FAO/WHO, 1999). Absorption and translocation of alkaloids in wheat (roots, leaves, stem) was determined by using atropine ¹⁴C. It was found that young wheat after 15 days absorbed approximately 4.30% and 2.28% of atropine ¹⁴C for low (13676 dpm/g soil) and high (37203 dpm/g soil) spiked levels in soil, respectively. Increase in the spiked concentration in the soil did not affect higher absorption of atropine ¹⁴C in wheat. The highest accumulation of atropine ¹⁴C was observed in the leaves (83%) while lowerconcentrations were detected in the roots (8.6%), stems (4.2%) and seeds (4.1%). In collected water samples during the soil leaching, atropine ¹⁴C was detected in the concentration of 0.5%. Leaching decreased with the time (0.01% after 90 days). Analyses of soil samples after 30 and 60 days showed strong adsorption of atropine to the soil and quantity of adsorbed atropine was 60% and 70%, respectively. Adsorbed atropine in the soil was stable after 90 days.

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Motyčka, Lukáš. „Radiofrekvenční metoda detekce výbušnin a drog - NQR“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219982.

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The thesis deals with RF spectroscopic methods, which are applicable for the detection of hazardous substances such as explosives or drugs. Particular attention is focused on promising method of nuclear quadrupole resonance. Abroad this method has recently been applied in the detection of energetic materials in hazardous locations. The cornerstone of the nuclear quadrupole resonance is to evaluate the interaction between electromagnetic radiation, in the range of medium to very short waves, and the researched substance. Observed parameter are the resonant frequencies of the substance. Spectral analysis of signal is used for their evaluation. Resonant frequencies are always typical for the crystalline structure, therefore every explosive or drug is clearly identifiable by this method.

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Schmidt, Karl F. „Development of Pharmacological Magnetic Resonance Imaging Methods and their Application to the Investigation of Antipsychotic Drugs: a Dissertation“. eScholarship@UMMS, 2006. https://escholarship.umassmed.edu/gsbs_diss/114.

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Pharmacological magnetic resonance imaging (phMRI) is the use of functional MRI techniques to elucidate the effects that psychotropic drugs have on neural activity within the brain; it is an emerging field of research that holds great potential for the investigation of drugs that act on the central nervous system by revealing the changes in neural activity that mediate observable changes in behavior, cognition, and perception. However, the realization of this potential is hampered by several unanswered questions: Are the MRI measurements reliable surrogates of changing neural activity in the presence of pharmacological agents? Is it relevant to investigate psychiatric phenomena such as reward or anxiolysis in anesthetized, rather than conscious animals? What are the methods that yield reproducible and meaningful results from phMRI experiments, and are they consistent in the investigations of different drugs? The research presented herein addresses many of these questions with the specific aims of 1) Developing pharmacological MRI methodologies that can be used in the conscious animal, 2) Validating these methodologies with the investigation of a non-stimulant, psychoactive compound, and 3) Applying these methodologies to the investigation of typical and atypical antipsychotic drugs, classes of compounds with unknown mechanisms of therapeutic action Building on recent developments in the field of functional MRI research, we developed new techniques that enable the investigator to measure localized changes in metabolism commensurate with changing neural activity. We tested the hypothesis that metabolic changes are a more reliable surrogate of changes in neural activity in response to a cocaine challenge, than changes observed in the blood-oxygen-level-dependent (BOLD) signal alone. We developed a system capable of multi-modal imaging in the conscious rat, and we tested the hypothesis that the conscious brain exhibits a markedly different response to systemic morphine challenge than the anesthetized brain. We identified and elucidated several fundamental limitations of the imaging and analysis protocols used in phMRI investigations, and developed new tools that enable the investigator to avoid common pitfalls. Finally, we applied these phMRI techniques to the investigation of neuroleptic compounds by asking the question: does treatment with typical or atypical antipsychotic drugs modulate the systems in the brain which are direct or indirect (i.e. downstream) substrates for a dopaminergic agonist? The execution of this research has generated several new tools for the neuroscience and drug discovery communities that can be used in neuropsychiatric investigations into the action of psychotropic drugs, while the results of this research provide evidence that supports several answers to the questions that currently limit the utility of phMRI investigations. Specifically, we observed that metabolic change can be measured to resolve discrepancies between anomalous BOLD signal changes and underlying changes in neural activity in the case of systemically administered cocaine. We found clear differences in the response to systemically administered morphine between conscious and anesthetized rats, and observed that only conscious animals exhibit a phMRI response that can be explained by the pharmacodynamics of morphine and corroborated by behavioral observations. We identified fundamental and drug-dependent limitations in the protocols used to perform phMRI investigations, and designed tools and alternate methods to facilitate protocol development. By applying these techniques to the investigation of neuroleptic compounds, we have gained a new perspective of the alterations in dopaminergic signaling induced by treatment with antipsychotic medications, and have found effects in many nuclei outside of the pathways that act as direct substrates for dopamine. A clearer picture of how neuroleptics alter the intercommunication of brain nuclei would be an invaluable resource for the classification of investigational antipsychotic drugs, and would provide the basis for future studies that examine the neuroplastic changes that confer therapeutic efficacy following chronic treatment with antipsychotic medications.

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Möller, Joakim. „Aspects of the recursive projection method applied to flow calculations“. Doctoral thesis, KTH, Numerical Analysis and Computer Science, NADA, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101.

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In this thesis, we have investigated the Recursive Projection Method, RPM, as an accelerator for computations of both steady and unsteady flows, and as a stabilizer in a bifurcation analysis.

The criterion of basis extraction is discussed. It can be interpreted as a tolerance for the accuracy of the eigenspace spanned by the identified basis, alternatively it can be viewed as a criterion when the approximative Krylov sequence becomes numerically rank deficient.

Steady state calculations were performed on two different turbulent test-cases; a 2D supersonic nozzle flow with the Spalart-Allmaras 1-equation model and a 2D sub-sonic airfoil simulation using the κ - ε model. RPM accelerated the test-cases with a factor between 2 and 5.

In multi-scale problems, it is often of interest to model the macro-scale behavior, still retaining the essential features of the full systems. The ``coarse time stepper'' is a heuristic approach for circumventing the analytical derivation of models. The system studied here is a linear lattice of non-linear reaction sites coupled by diffusion. After reformulation of the time-evolution equation as a fixed-point scheme, RPM coupled with arc-length continuation is used to calculate the bifurcation diagrams of the effective (but analytically unavailable) equation.

Within the frame-work of dual time-stepping, a common approach in unsteady CFD-simulation, RPM is used to accelerate the convergence. Two test-cases were investigated; the von Karman vortex-street behind a cylinder at Re=100, and the periodic shock oscillation of a symmetric airfoil at M ∞ = 0.76 with a Reynolds number Re=11 x 10^6.

It was believed that once a basis had been identified, it could be retained for several steps. The simulations usually showed that the basis could only be retained for one step.

The need for updating the basis motivates the use of Krylov methods. The most common method is the (Block-) Arnoldi algorithm. As the iteration proceeds, Krylov methods become increasingly expensive and restart is required. Two different restart algorithm were tested. The first is that of Lehoucq and Maschhoff, which uses a shifted QR iteration, the second is a block extension of the single-vector Arnoldi method due to Stewart. A flexible hybrid algorithm is derived combining the best features of the two.

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Björk, Cecilia. „Undervisning i främmande språk. En fallstudie om metoder i språkundervisningsprocessen“. Thesis, Linköping University, Department of Educational Science (IUV), 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1421.

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Föreliggande studie undersöker metodiken i språkundervisningen. På så sätt vill jag tydliggöra undervisningsprocessen. Metodikämnet kan ses som ett redskap för att kunna utöva yrket och utan metodiken skulle språklärarna sakna den grundläggande yrkeskunskapen. Alexandersson&Morberg (1993) skriver att metodikämnets åliggande ligger i att i ord ge uttryck för den yrkeskunskap som en erfaren och reflekterande lärare har vävt in i sitt yrke, det vill säga, klarlägga läraryrkets tysta kunskap. Jag anser att det borde ligga i varje lärares intresse att skapa en så effektiv, nöjsam och lärorik undervisning som möjligt och ju fler metoder man har att tillgå desto större är chansen att uppfylla sådana krav. Därför ämnar jag att redogöra för olika språkmetoder som används eller har använts vid språkundervisning.

För att se eventuella metoder som använts idag har jag använt mig av både en etnografisk och en fenomenologisk ansats. Genom observationer, videoinspelningar av fyra lektioner samt en intervju med en lärare har jag sökt svar på mina övergripande frågor: Hur reflekterar läraren omkring sin undervisning? Hur ser några metoder och övningar ut i den undersökta lärarens klassrum? Kan man se någon dominans av någon metod i lärarens undervisning?

Då jag enbart gjort en fallstudie kan jag inte dra några generella slutsatser men jag kom fram till att det är den kommunikativa kompetensen som är i fokus i lärarens klassrum, i enighet med Lpo 94. Läraren låter eleverna träna mycket hörförståelse dels genom att läraren själv talar mycket, och dels genom bandinspelningar. Hon använder sig av mycket autentiskt material för att skapa ett meningsfullt lärande för eleverna. Det går inte att skönja någon renodlad metod i lärarens undervisning men kan man se kopplingar till flera olika metoder. En stor del av kommunikationen i klassrummet sker på målspråket vilket är kännetecknande för direktmetoden. Kopplingar kan även göras till functionalnotional approachmetoden, då läraren arbetar utifrån valda ämnesområden som kan vara intressanta för eleverna. Ur ämnesområdena skapar läraren sedan innehållet i form av fraser, glosor och grammatik som eleverna ska lära sig.

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Möller, Joakim. „Aspects of the Recursive Projection Method applied to flow calculations /“. Stockholm : KTH Numerical Analysis and Computer Science, Royal Institute of Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101.

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Peluso, Anthony, Katie Baker und Joel Hillhouse. „DUAL METHOD USE IN A SAMPLE OF COLLEGE-AGED WOMEN“. Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/145.

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Dual method use, or the concurrent use of one contraceptive method to prevent pregnancy and another to reduce the risk of sexually transmitted infections (STIs), is an ideal practice for young women but is underutilized. In a recent National Survey of Family Growth (NSFG) study, 7.4% of women of reproductive age reported dual method use at last intercourse. In the same NSFG study, dual method use at last intercourse among women 15-20 years old was somewhat higher at 22.8%; still, this estimate indicates low utilization when compared to recent trends in the prevalence of single-contraceptive method use by young women. Apart from the NSFG and some smaller scale studies, there have been minimal efforts to explore dual method use in high-risk populations of young women such as college students. This is surprising, given that college students typically have more opportunities to be sexually active than other groups and often engage in serial monogamy or have multiple sexual partners during their college years. This study aimed to add to previous research on women’s health and contraception by assessing college women’s contraceptive use, including dual method use, and examining factors that influence contraceptive decision-making. Female students at ETSU were surveyed through the Department of Psychology research participation system from Oct 2017-Dec 2017. Students received class credit for survey completion. Data were analyzed using descriptive statistics in SPSS (Version 24.0). To be consistent with previous studies on health behaviors of college-aged women, the final dataset included only female college students between ages 18 and 25 (n=379). About one-fifth (21.1%) of women reported current dual method use. Of particular interest, only 30.5% of women who indicated sexual activity in the past six months also reported dual method use. Nevertheless, most women reported positive feelings about dual method use and indicated they would not find it hard to achieve dual method use; 69.1% reported feeling great or good about dual method use, and 74.5% indicated that it would not be hard to use condoms plus another form of birth control together correctly. Future efforts to study dual method use in college women should include close examination of subgroups who have yet to commit to dual method use but have positive attitudes and intentions regarding dual method use. Results of this study also indicate a need to implement educational and promotional strategies in college environments to better inform college-aged women about dual method use and its benefits.

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Pereira, Michel Toussaint Alves. „Da arquitectura à teoria e o universo da teoria da arquitectura em Portugal na primeira metade do século XX“. Doctoral thesis, Universidade Técnica de Lisboa. Faculdade de Arquitectura, 2009. http://hdl.handle.net/10400.5/1411.

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Doutoramento em Teoria da Arquitectura
A palavra Arquitectura tem origem grega e o primeiro livro de Arquitectura que chegou até nós tem mais de dois mil anos. De então para cá vários foram os entendimentos sobre a Arquitectura, como conceito, como conjunto de existências construídas, como práticas profissionais, como conjunto de conhecimentos, como disciplina. O primeiro passo desta dissertação é o perscrutar esses entendimentos para definir um campo dentro do qual se pode falar de Arquitectura. Um segundo passo interroga a legitimidade contemporânea da disciplina da Arquitectura, o seu conteúdo, métodos e relações e finalmente a Teoria da Arquitectura. Enquanto um terceiro passo corresponde à observação, com a informação dos passos anteriores, do universo da Teoria da Arquitectura em Portugal na primeira metade do século XX, escolhendo três casos que se estendem por esse período: Raul Lino e a Casa Portuguesa a partir do debate nas revistas, bem como a sua luta contra a Arquitectura Moderna nos jornais diários; a geração Modernista presa à sua filiação Belas Artes, mas com uma vontade modernizante num particular contexto histórico; Keil do Amaral, figura de transição para o Movimento Moderno, preparando uma transformação disciplinar ao estabelecer a Arquitectura como uma base da felicidade dos povos e reconhecer a necessidade de uma racionalidade integrada, respondendo assim a uma nova responsabilidade e à evolução dos conhecimentos para um país que se pensava poder progredir.
ABSTRACT: The word Architecture has a greek origin and the first book on Architecture, that survived until know, has more than two thousand years. From that period to nowadays several understandings were produced about Architecture as a concept, as a body of building existences, as a professional practices, as a body of knowledges, as a discipline. The first step of this study is the inquiry about those understandings to define a field in which we can speak about Architecture. A second step is the interrogation about the contemporary legitimacy of the discipline of Architecture, his content, methods and relationships and at last the Theory of Architecture. The third step is the observation, with the information from the previous steps, of the world of the Theory of Architecture in Portugal during the first half of the 20th century, choosing three examples that existed in that period: Raul Lino and the Casa Portuguesa from the debate in the architectural reviews, and his fight against the Modern Architecture in the daily papers; the Modernist generation close to the Beaux Arts views, but with a modernizing will in a particular historic context; Keil do Amaral, which is an architect between two periods, in transition to the Modern Movement, preparing a transformation of the discipline rooted on the idea that Architecture is one of the bases of the people’s happiness and recognizing the need of a whole rationality, responding to a new responsibility and to the evolution of the knowledges in a country that many thought could progress.

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Dissertationen zum Thema „Metoda 141“

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