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Aspnes, Richard K., and Russell J. Yuma. "MMTS: Multi-Vehicle Metric & Telemetry System." International Foundation for Telemetering, 1988. http://hdl.handle.net/10150/615244.
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International Telemetering Conference Proceedings / October 17-20, 1988 / Riviera Hotel, Las Vegas, NevadaThe Multi-Vehicle Metric & Telemetry System (MMTS) is a complete range system which performs real-time tracking, command destruct, and telemetry processing functions for support of range safety and the test and evaluation of airborne vehicles. As currently configured, the MMTS consists of five hardware and software subsystems with the capability to receive, process, and display tracking data from up to ten range sensors and telemetry data from two instrumented vehicles. During a range operation, the MMTS is employed to collect, process, and display tracking and telemetry data. The instrumentation sites designated for operational support acquire tracking and telemetered data and transmit these data to the MMTS. The raw data is then identified, formatted, time tagged, recorded, processed, and routed for display to mission control and telemetry display areas. Additionally, processed tracking data is transmitted back to instrumentation sites as an aid to acquire or maintain vehicle track. The mission control area consists of a control and status console, high resolution color graphics stations, and large screen displays. As the mission controller observes mission progress on the graphics stations operational decisions can be made and invoked by activation of the appropriate console controls. Visual alarms provided my MMTS will alert mission control personnel of hazardous conditions posed by any tracked vehicle. Manual action can then be taken to activate transmission of the MMTS vehicle destruct signal. The telemetry display area consists of ten fully-functional, PC compatible computers which are switchable to either of two telemetry front end processors. Each PC can be independently set up by telemetry analysts to display data of interest. A total of thirty data pages per PC can be defined and any defined data page can be activated during a mission. A unique feature of the MMTS is that telemetry data can be combined with tracking data for use by the range safety functions.
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Williams, G. Grant, R. Ortiz, W. Goble, and J. D. Gibson. "The 6.5-m MMT Telescope: status and plans for the future." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622514.
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The MMT Observatory, a joint venture of the Smithsonian Institution and the University of Arizona, operates the 6.5-m MMT telescope on the summit of Mount Hopkins approximately 45 miles south of Tucson, AZ. The upgraded telescope has been in routine operation for nearly fifteen years and, as such, is a very reliable and productive general purpose astronomical instrument. The telescope can be configured with one of three secondary mirrors that feed more than ten instruments at the Cassegrain focus. In this paper we provide an overview of the telescope, its current capabilities, and its performance. We will review the existing suite of instruments and their different modes of operation. We will describe some of the general operations challenges and strategies for the Observatory. Finally, we will discuss plans for the near-term future including technical upgrades, new instrumentation and routine queue operation of MMIRS and Binospec.
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Lee, Huay-Leng. "Glucocorticoid receptor mediated MMTV chromatin remodelling in vivo." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq28504.pdf.
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Kimm, Melanie. "Identifizierung neuer Tumorprogressionsgene in MMTV-induzierten BALB/c+ -Mammakarzinomen." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-74077.
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Zhu, Quan. "Role of CDP in MMTV transcriptional regulation and tumorigenesis." Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037038.
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Johal, Harpreet Biotechnology & Biomolecular Sciences Faculty of Science UNSW. "The mouse mammary tumour virus - like virus in hormonally influenced human tissues." Awarded by:University of New South Wales. Biotechnology & Biomolecular Sciences, 2009. http://handle.unsw.edu.au/1959.4/44734.
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The identification of Mouse Mammary Tumour Virus (MMTV) as the causal factor for breast cancer in mice, initiated investigation into a viral cause for human breast cancer. MMTV-like virus has been detected in human breast cancers, lymphomas and primary biliary cirrhosis (PBC), suggesting the virus is not restricted to human breast cancers. We hypothesized that the virus is detected in human tissues influenced by steroid hormones. We detected a region of the envelope (env) gene of MMTV-like virus in 53/210 (25%) of liver disease, 4/21 (19%) of hepatocellular carcinoma (HCC), 14/89 (16%) of ovarian cancer, 53/147 (36%) of prostate cancer, 5/50 (10%) of endometrial cancer and 13/141 (9%) of skin cancer samples but not in lung cancers (0/51). Viral env DNA was also detected in 4/81 (5%) of placentae and 5/90 (6%) of breast milk cells from healthy women whilst viral env RNA was detected in 2/90 (2%) of breast milk supernatants and (0/81) placentae. Immunohistochemistry staining for the presence of estrogen receptor alpha (ER-??) and progesterone receptor (PgR) demonstrated a significant association between ER-??/PgR and MMTV-like virus in human ovarian, prostate, endometrial and skin cancers though no significant association was observed between ER-??/PgR and the virus in liver tissues. We were also unable to demonstrate a significant association between accumulation of p53 tumour suppressor protein and MMTV-like virus in liver disease and HCC. Despite the demonstration of viral env integration in genomic DNA from human placentae using Southern Blots, other regions of the virus were not detected following PCR attempts with published primer sets. This study adds to the current knowledge of distribution of MMTV-like virus in humans. The detection of the virus in hormonally influenced human tissues (positive for ER-?? or PgR) indicates an association between MMTV-like virus and steroid hormones in some human tissues. The detection of the virus in placentae and breast milk also suggests potential routes of transmission of the virus in humans. Although the exact role of the virus in these tissues is not known, the presence of the virus together with other genetic alterations and/or the influence of steroid hormones could be involved in the transformation of various human tissues (i.e.pathogenesis).
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Fagerqvist, Gustaf. "Integrering av DSP i talförstärkaren MMT-4." Thesis, Linnaeus University, School of Computer Science, Physics and Mathematics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-7955.
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Att ansluta en digital signalprocessor kräver ett omfattande arbete. Innehållet i denna rapport sammanfattar teoretiska metoder för att integrera den digitala signalprocessorn ADAU1701 i talförstärkaren MMT-4, utvecklad av företaget Xena Medical. Arbetet har till största delen bestått i att finna en lämplig DSP och studera dess datamanual för att anpassa den till talförstärkaren.
Mycket av rapporten sammanfattar beräkningar av komponentvärden och anpassning av ADAU1701 för MMT-4:s behov. ADAU1701 beskrivs utifrån det så kallade selfboot-läget där processorn kan arbeta som fristående processor.
This thesis describes how to integrate a digital signal processor (DSP) in the speech amplifier MMT-4. This is to improve the sound quality and prevent feedback. Much of the task consisted of selecting a suitable DSP design and components to get it work as a standalone processor in MMT-4. Following this report gives the reader an introduction how to design systems with a DSP and a full description of the DSP ADAU1701.
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Liu, Jinqi. "Characterization of negative regulatory proteins involved in tissue specific MMTV expression /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
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Gibson, J. D., Dallan Porter, and William Goble. "Automation and control of the MMT thermal system." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622546.
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This study investigates the software automation and control framework for the MMT thermal system. Thermal-related effects on observing and telescope behavior have been considered during the entire software development process. Regression analysis of telescope and observatory subsystem data is used to characterize and model these thermal-related effects. The regression models help predict expected changes in focus and overall astronomical seeing that result from temperature variations within the telescope structure, within the primary mirror glass, and between the primary mirror glass and adjacent air (i.e., mirror seeing). This discussion is followed by a description of ongoing upgrades to the heating, ventilation and air conditioning (HVAC) system and the associated software controls. The improvements of the MMT thermal system have two objectives: 1) to provide air conditioning capabilities for the MMT facilities, and 2) to modernize and enhance the primary mirror (M1) ventilation system. The HVAC upgrade necessitates changes to the automation and control of the M1 ventilation system. The revised control system must factor in the additional requirements of the HVAC system, while still optimizing performance of the M1 ventilation system and the M1's optical behavior. An industry-standard HVAC communication and networking protocol, BACnet (Building Automation and Control network), has been adopted. Integration of the BACnet protocol into the existing software framework at the MMT is discussed. Performance of the existing automated system is evaluated and a preliminary upgraded automated control system is presented. Finally, user interfaces to the new HVAC system are discussed.
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Jin, Zeming. "Effects of soy isoflavones on breast tumorigensis in MMTV-NEU transgenic mice /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3101026.
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Söylemez, Ekrem Sezer. "Automatic verification of the timing properties of MMT automata." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35002.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.Includes bibliographical references (leaves 92-93).
by Ekrem Sezer Sölemez.
M.Eng.
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Gren, Karin. "Arbetsterapeuters användning av Mini Mental Test (MMT) inom kommunal rehabilitering." Thesis, Örebro universitet, Hälsoakademin, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-15668.
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Sammanfattning Inom den kommunala rehabiliteringen möter arbetsterapeuten personer med vitt skilda slag av sjukdomar och funktionsnedsättningar. En av de vanligare grupperna är personer, som av olika skäl drabbas av kognitiva nedsättningar. Arbetsterapeuten bedömer personer med kognitiva funktionsnedsättningar bl.a. med hjälp av olika bedömningsinstrument. Screening -instrumentet Mini Mental Test (MMT) är ett av de mest använda. Det finns forskning där MMT använts för att diagnostisera eller utvärdera interventioner, däremot behövs mer kunskap om hur arbetsterapeuter använder och uppfattar MMT. Syftet med denna studie var att beskriva arbetsterapeuters användning av Mini Mental Test (MMT) inom kommunal rehabilitering. Data samlades in med hjälp av ett frågeformulär, som sändes till samtliga arbetsterapeuter anställda inom Örebro kommun. Svaren analyserades med hjälp av beskrivande statistik. Resultatet visade att 79 % av arbetsterapeuterna använde MMT för att bedöma en klients kognitiva nedsättning. Den vanligaste orsaken till att ett MMT initierades var remiss från läkare (85 %). Sjuttiotre procent angav att de inte tolkade resultatet, innan remissvaren sändes åter. Sextiosju procent använde resultatet från MMT till att skriva remissvar medan 15 % angav att resultatet användes som underlag, för att planera vilka åtgärder de skulle välja.
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Miller, Marvin Lloyd. "The performance of ancient Jewish letters : from Elephantine to MMT." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/the-performance-of-ancient-jewish-letters-from-elephantine-to-mmt(359df1ce-416a-4446-83b9-e03943539c04).html.
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This thesis will apply performance criticism to ancient Jewish letters in order to answer two connected questions. First, how do we adequately describe the form and function of letters as they were read in antiquity in order to be able to define the genres of letters in a more precise way and second, to consider how performance theory in conjunction with other approaches can be applied to ancient letters. In order to address these concerns, we will include examples of free-standing letters from Elephantine, embedded Hebrew and Aramaic letters, and embedded Greek letters. By studying these texts, we will gain a substantial perspective on the variety of Second Temple period letters and we will be able to consider how probing the form and function of those letters may be applied for a better understanding of MMT. The intent of this inquiry is to help explain how MMT, or a section thereof, may have been performed in various situations and thereby provide a clearer view of the genre(s) of MMT.
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Vasconcelos, Fernanda Gomes de. "Avaliação dos resultados obtidos no equipamento Moisture Management Tester (MMT) comparativamente a outros métodos de medida de gerenciamento de umidade." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/100/100133/tde-31102016-153333/.
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O conforto é um aspecto muito importante ao se tratar de vestuário, por isso cada vez mais estão sendo desenvolvidos tecidos com características específicas para proporcionar conforto nas mais diversas situações de uso. Dentro desse contexto, o conforto térmico fisiológico tem papel fundamental e um dos seus pontos chave é a capacidade dos têxteis de gerenciar a umidade proporcionada pelo processo de suor do corpo. O equipamento Moisture Management Tester (MMT) foi desenvolvido para possibilitar uma avaliação prática e confiável dessa propriedade dos tecidos e permite calcular um índice que reflete a capacidade global de gestão de umidade (OMMC) das amostras analisadas. O objetivo desse trabalho é realizar uma avaliação dos resultados obtidos no equipamento MMT em tecidos de malha fabricados com diversos tipos de fios e de contexturas e comparar os resultados com outros métodos de medida de gerenciamento de umidade, para verificar a eficácia do equipamento em quantificar a diferença de comportamento entre os tecidos analisados. Através da análise estatística concluiu-se que a metodologia utilizada no MMT possui uma divisão mais equilibrada da influência dos fatores para os resultados encontrados, sendo mais fiel ao que acontece com o tecido na pratica, com resultados mais representativos, pois todos os fatores que interferem nos resultados são consideração de maneira equilibradaComfort is a very important aspect related to garments, that is why fabrics containing specific characteristics to provide comfort in all kinds of situations are being developed. Within this context, the physiological thermal comfort plays a crucial role and one of his key points is the ability of textile to manage moisture provided by the body sweat process. The Moisture Management Tester (MMT) methodology was developed to enable a practical and reliable evaluation of this property of fabrics and allows the calculation of an index that reflects the overall moisture management capacity (OMMC) of the samples. The objective of this was to provide an evaluation of the results obtained on MMT on different types of yarn and knits compared to other moisture management methods of measurement, and intending to verify the effectiveness of the equipment to quantify the difference in behavior among the analyzed fabrics. Through statistical analysis, it was concluded that the methodology used in MMT has a more balanced division of the factors influence in founded results, seen as more faithful to what happens to fabric in practice, with more representative results because all factors that interfere in the results are considered in a balanced way
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Poplineau, Mathilde. "Rôles des mécanismes épigénétiques dans la régulation de l’expression de gènes impliqués dans l’invasion de cellules tumorales." Thesis, Reims, 2012. http://www.theses.fr/2012REIMS033/document.
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Les propriétés invasives des cellules cancéreuses sont liées à des modulations importantes de l’expression de gènes. Des protéases doivent être exprimées afin de permettre la dégradation de la matrice extracellulaire (MEC), l’activation protéolytique de protéines matricielles et la libération de facteurs de croissance, de cytokines, de récepteurs et de molécules d’adhérence. Parmi ces protéases, les métalloprotéinases matricielles (MMPs) jouent un rôle crucial dans la dégradation de la MEC et dans le remodelage tissulaire observéau cours de l’invasion tumorale. L’émergence de thérapeutiques anticancéreuses basées sur des stratégies épigénétiques nécessitent d’évaluer leurs effets sur les propriétés des cellules tumorales. Ce travail a pour objectif d’analyser les effets de modulateurs épigénétiques (un agent hypométhylant de l’ADN et des inhibiteurs d’histone désacétylases (inhibiteursd’HDACs ou HDIs)) sur l’expression des MMP-1, -2 et -9 dans la lignée cellulaire de fibrosarcome humain HT1080. Dans un premier temps, il apparaît que l’agenthypométhylant de l’ADN, la 5-aza-2’désoxycytidine (5-azadC), augmente l’expressiongénique et protéique des MMP-1, -2 et -9. Ces modifications de l’expression sont associées à (i) une déméthylation globale de l’ADN et (ii) des modifications de la supra-organisation chromatinienne correspondant globalement à une chromatine moins condensée. De plus, la5-azadC est capable d’accroître les propriétés invasives des cellules par l’intermédiaire,notamment, d’une augmentation de l’expression de la MMP-1 par un mécanisme transcriptionnel. Cette augmentation de la transcription implique le recrutement du facteurSp1 et un remodelage chromatinien au niveau du promoteur du gène de la MMP-1.Néanmoins, une déméthylation totale de ce promoteur n’est pas nécessaire à cette induction. De manière complémentaire, le traitement des cellules HT1080 par différents HDIs révèle le rôle potentiel d’HDACs dans la régulation de l’expression de la MMP-1. Un HDIà large spectre, la trichostatine A (TSA), est capable de moduler l’expression de la MMP-1 et la texture nucléaire, mais uniquement après déméthylation préalable de l’ADN par la 5-azadC. Par contre, l’HDI spécifique des HDACs de classe I, le MS-275, est capable d’induire, à lui seul, l’expression génique et protéique de la MMP-1. Cette expression génique requiert un remodelage de la chromatine et le recrutement de l’histone acétyltransférase p300 au niveau du promoteur du gène de la MMP-1. L’ensemble de ces résultats suggèrent que des mécanismes épigénétiques jouent un rôle crucial dans le contrôle de l’expression de laMMP-1 dans les cellules HT1080, influençant ainsi les propriétés invasives de ces cellulesInvasive properties of cancer cells require critical changes in gene expression. Proteasesmust be expressed for the degradation of the extracellular matrix (ECM), the proteolyticactivation of matrix proteins and the release of bioactive molecules such as growth factors,cytokines, receptors and adhesion molecules. Among these proteases, the matrixmetalloproteinase (MMP) family members play a crucial role in the ECM breakdown andremodeling of tissues during tumor invasion. The introduction of epigenetic strategies in thetherapeutic arsenal against cancer led to the need to evaluate the effects of suchtherapeutic approaches on cell behavior. Here we focused our attention on the effects ofepigenetic modulators, a DNA hypomethylating agent and histone deacetylase inhibitors(HDAC inhibitors or HDI), on the expressions of MMP-1,-2, and -9 in the human HT1080fibrosarcoma cell line. First, we showed that the DNA hypomethylating drug 5-aza-2’deoxycytidine (5-azadC) increases MMP-1, -2, -9 expressions both at the mRNA andprotein levels. These changes in gene expression are associated with (i) a global DNAdemethylation and with (ii) modifications in chromatin supra-organization which globally correspond to a more decondensed chromatin. Moreover, 5-azadC is able to increase theinvasive properties capability of the HT1080 cells mainly via MMP-1 transcription-dependent expression. This enhancement of transcription occurs through (i) Sp1 recruitment, (ii)chromatin remodeling and (iii) in absence of full demethylation on the MMP-1 genepromoter. Using different HDIs reveals that HDACs could potentially play a role in MMP-1expression. The pan-HDI trichostatin A (TSA) act in synergy with 5-azadC and is able tomodulate MMP-1 expression and nuclear texture, but only after DNA demethylation. Incontrast, the HDAC class I inhibitor, MS-275, which display additive effect with 5-azadC, isable to induce, alone, MMP-1 gene expression through chromatin remodeling and p300recruitment to its promoter. These data suggest that epigenetic mechanisms play a crucialrole in MMP-1 expression control in HT1080 cells thus influencing the invasive potential ofthese cells
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Johnson, Robert L. "Calibration and testing of the 6.5 m MMT adaptive optics system." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/280042.
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This dissertation describes the development, calibration, and testing of the adaptive optics system for the 6.5 m Multiple Mirror Telescope. By employing a deformable secondary mirror, the MMT adaptive optics system uniquely solves several problems typical of astronomical adaptive optics systems. Extra components are eliminated, improving throughput and reducing emissivity. Since the adaptive secondary is integral to the telescope, a corrected beam is presented to any instrument mounted at Cassegrain focus. The testing of an adaptive mirror, which is large and convex, poses a new and difficult problem. I present a test apparatus that allows complete calibration and operation, in closed-loop, of the entire adaptive optics system in the laboratory. The test apparatus replicates the optical path of the telescope with a wavefront error of less than 500 nm RMS. To simulate atmospheric turbulence, machined acrylic plates are included. A phase-shifting interferometer allows calibration of the Shack-Hartmann wavefront sensor and reconstruction algorithms; comparisons agree to one-third of the root-mean-square wavefront. First, techniques were developed to align the apparatus and measure residual aberration. Then, the wavefront sensor was calibrated by measuring its response to introduced tilt. Lastly, a Fourier wave-optics approach was used to produce a modal wavefront reconstructor. The adaptive secondary mirror uses electro-magnetic force actuators. Capacitive position sensors are placed at each actuator to permit control of the mirror shape without measuring the reflected wavefront. These sensors have nanometer resolution, but require calibration. To calibrate the sensors, I developed a small optical instrument which measures the thickness of transparent films to an absolute accuracy of 5 nm with a precision of 2 nm. The device has applications far beyond the scope of this research. Twenty-four of these optical gap sensors have been built to calibrate the 336 capacitive sensors on the adaptive secondary mirror. Mirror displacements measured using gap sensors and a phase-shifting interferometer agree to 2 percent of the displacement. The gap sensors allow for quick and accurate calibration of the capacitive sensors without the difficulty of installing an interferometer on the telescope.
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Paranhos, Juliana Feldens. "Método dos modelos termodinâmicos simplificados (MMTS) : uma abordagem eficiente para descrever o equilíbrio líquido-vapor." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/101174.
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O estudo e a compreensão da termodinâmica é extremamente importante para todos os processos que envolvam equilíbrio de fases. A determinação das propriedades termodinâmicas de uma mistura pode ser obtida por diferentes formas de cálculo, que podem consumir um grande tempo computacional e apresentar difícil solução. Para casos que envolvam controle e simulações online, otimizações em tempo real e até simuladores de treinamento de operadores (OTS) isso pode ser um fator decisivo no emprego da aplicação. Esta dissertação propõe uma nova formulação denominada de Método dos Modelos Termodinâmico Simplificado (MTS) em lugar da utilização dos modelos termodinâmicos locais (MTL), os quais são destinados à redução do tempo computacional de simulações de processos, através da aproximação de modelos rigorosos e da simplificação das rotinas de cálculos termodinâmicos de equilíbrio líquido-vapor. O MTS proposto neste trabalho é constituído por parâmetros que são estimados utilizando dados calculados de forma rigorosa e que permitem a sua utilização em uma região significativamente mais ampla. Inicialmente, avaliaram-se alguns MTLs empregados na literatura e a partir destes foi proposto um novo modelo com adição de um parâmetro capaz de melhorar a dependência da temperatura de ponto de bolha. Para se determinar os parâmetros do MTS, foi formulado um problema de otimização em que a função objetivo envolve os erros nos ajustes das constantes de equilíbrio e o erro na predição da temperatura de ponto de bolha da mistura, tendo como restrição de igualdade o somatório da composição da fase vapor. Nessa nova abordagem todos os parâmetros são obtidos simultaneamente. Em trabalhos anteriores, os parâmetros eram determinados através da resolução de um problema de mínimos quadrados formulados para cada constante de equilíbrio separadamente. As propriedades termodinâmicas obtidas com essa nova metodologia foram comparadas às propriedades obtidas com modelos rigorosos, apresentando boa correlação e solução simples. O novo MTS e a metodologia proposta foram também validados para uma mistura de cinco componentes. Finalmente o modelo obtido para a mistura acetona, benzeno e etanol foi implementado em uma simulação dinâmica de uma coluna de destilação. Os resultados obtidos foram muito satisfatórios, reduzindo o tempo de resolução do problema em aproximadamente 50 vezes quando comparado ao tempo necessário para resolver o mesmo problema utilizando o modelo rigoroso.Thermodynamics is very important for all processes involving phase equilibrium. The determination of the thermodynamic properties of a mixture can be obtained by different ways of calculation, which can spend a large computational time and present difficult solution. For cases involving online control and simulations, real-time optimizations and operator training simulators (OTS) this point can be a decisive factor in the use of application. A new concept is proposed for the use of local thermodynamic models (LTM), which are aimed at reducing the computational time of processes simulations, through the approximation of rigorous models and simplifying thermodynamic routines of phase equilibrium calculations, to be used in a new approach, as a simplified thermodynamic models (STM) with global application. The STM presented consists of parameters that are estimated using data rigorous calculated. First of all, some LTM presented in the literature were evaluated and it was proposed a new model with the addition of one parameter that provides better adjustment to the bubble point temperature. This new model was called STM. After define an STM for a ternary mixture, we a new methodology to obtain the model parameters was proposed. In previous papers, the parameters were determined by solving a least squares problem, it is necessary to obtain separately the parameters of each component model. The new methodology is based on an optimization problem that minimizes the error between the K-value obtained by rigorous model and the K-value predicted by STM, adjusting the parameters of all components simultaneously in the same calculation and estimating the bubble point temperature of mixture. The thermodynamic properties obtained with this new method were compared to the properties obtained with rigorous models, presenting good correlation and simple solution. The new STM and the proposed methodology were also validated for a mixture of five components. Finally the model obtained for the mixture was implemented in a dynamic simulation of a distillation column, in which it was obtained very satisfactory results, reducing the time to resolution of the problem in about 50 times when compared to the time required to solve the same problem using the rigorous model.
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Pinto, AlaÃdes Maria Borba. "Desenvolvimento de filmes e revestimentos biodegradÃveis à base de amido, goma de cajueiro e montmorilonita." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9184.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorO objetivo desse trabalho foi desenvolver filmes biodegradÃveis à base de amido e goma de cajueiro, acrescidos ou nÃo de montmorilonita. Em uma primeira etapa, foi feito um delineamento experimental composto central a partir de misturas entre amido e goma de cajueiro (1:1, m:m) adicionadas de diferentes concentraÃÃes da argila montmorilonita (0 a 15% - MMT) e tempos de ultrassom (0 a 5 min), onde foi realizado um estudo das variaÃÃes de desempenho de filmes produzidos por deposiÃÃo (casting), em funÃÃo das variÃveis. Os filmes foram avaliados em termos de propriedades Ãticas, mecÃnicas, de barreira e tÃrmicas e analisados por Microscopia eletrÃnica de varredura (MEV) e Ãngulo de contato. Em uma segunda etapa do trabalho, as formulaÃÃes dos filmes amido e goma de cajueiro (AGC) e os de amido, goma de cajueiro e montmorilonita AGC-MMT foram testadas como revestimentos para amÃndoas de castanhas de caju. As amÃndoas revestidas com AGC e AGC-MMT, assim como um controle (amÃndoas sem revestimento), foram acondicionadas em sacos plÃsticos de polietileno de baixa densidade, estocadas em temperatura e umidade ambiente e tiveram sua estabilidade avaliada. Os testes de estabilidade realizados foram baseados em medidas de absorÃÃo de umidade, atividade de Ãgua e do grau de oxidaÃÃo das amÃndoas (determinado por Ãndice de perÃxido e Ãndice de acidez). O incremento de MMT interferiu nas propriedades Ãticas dos filmes, aumentando sua opacidade. A permeabilidade ao vapor de Ãgua dos filmes produzidos foi significativamente (p < 0,05) reduzida pela MMT. A resistÃncia à traÃÃo e o mÃdulo elÃstico apresentaram valores mÃximos em uma faixa intermediÃria de concentraÃÃo de MMT. O tempo de ultrassom favoreceu a dispersÃo da argila em concentraÃÃes baixas de MMT, porÃm em concentraÃÃes maiores favorece a formaÃÃo de aglomerados, o que tambÃm à visualizado nas micrografias obtidas por MEV. Com o aumento do tempo de ultrassom, a resistÃncia à traÃÃo e o mÃdulo tenderam a aumentar. As curvas de DSC do amido, goma de cajueiro e do filme produzido sem MMT apresentaram picos endotÃrmicos similares em torno de 110ÂC, que podem estar relacionados à superposiÃÃo de eventos como vaporizaÃÃo da Ãgua e fusÃo da fase cristalina dos componentes. A medida do Ãngulo de contato comprovou que os filmes produzidos sÃo altamente hidrofÃlicos. Os testes de estabilidade realizados mostram que os revestimentos AGC e AGC-MMT conferem menor acidez e Ãndice de perÃxidos quando comparados a um controle podendo ser uma alternativa para aumento da vida de prateleira das amÃndoas de castanhas de caju, servindo como embalagem primÃria.
The purpose of this study was to develop biodegradable films based on starch and cashew gum, added or not with montmorillonite. At a first stage, a central composite experimental design was carried out from mixtures of starch and cashew gum (1:1, m: m) added with different concentrations of montmorillonite (0-15% - MMT) and submitted to variable ultrasound times (0-5 min), In a study of variations in the performance of films produced by casting. The films were evaluated in terms of optical properties, mechanical, barrier and thermal. As well as scanning electron microscopy (SEM) and contact angle. In a second stage of the work, the formulations of the films based on starch and cashew tree gum (SCG) and starch cashew tree gum and montmorillonite (SCG-MMT) were tested as coatings for cashew kernels. The kernels coated with SCG and SCG-MMT, as a control (uncoated kernels) were placed in plastic bags of low density polyethylene, stored at room temperature and relative humidity and their stability were evaluated. Stability tests were based on measurements of moisture absorption, water activity and the degree of oxidation of almonds (determined by peroxide value and acid value). The increase of MMT concentration interfered with the optical properties of the films, increasing its opacity. The water vapor permeability of films was significantly (p <0.05) reduced by the MMT. The tensile strength and elastic modulus showed a peak in an intermediate range of concentration of MMT. The time of ultrasound favors the dispersion of clay in low concentrations of MMT, but at higher concentrations et led to formation of agglomerates, which also appeared in SEM micrographs. With the increase of ultrasound times tensile strength and modulus tended to increase. DSC curves of starch, cashew gum and the film produced without MMT the endothermic peaks had similar MMT about 110 Â C, that may be related superposition events such as the vaporization of water and melting of the crystalline phase of the components. The contact angle measurement showed that the films are highly hydrophilic. Stability tests performed show that the coatings AG and AG-MMT give less acidity and peroxide value when compared to a control, may be an alternative of the use to increase the shelf life of almonds cashew nuts serving as primary packaging.
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Leung, Chun-to, and 梁鎮濤. "Cellular and molecular characterization of mammary tumor development in wild type and adiponectin deficient MMTV-PyVT mice." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50712640.
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Breast cancer is the most common malignant cancer in western countries. It can be classified into various types/stages according to patient age, tumor size, histological grade or hormone receptor status. Obesity is a well-known risk factor of breast tumor. Studies have shown that overweight or obese postmenopausal women have a threefold higher risk to develop breast cancer in comparison to their lean or normal counterparts. There are many mechanisms that can link obesity with breast cancer and one of the major contributors is adipokines. The main focus of this study is adiponectin. Many cellular and animal studies have illustrated the inhibitory action of adiponectin on breast cancer cell proliferation. In this study, the effect of complete loss of adiponectin expression on breast cancer development in Mouse Mammary Tumor Virus-polyomavirus middle T antigen(MMTV-PyVT)mice [PyVT(+/-)]will be investigated. Mice with [ADN(+/+)]or without [ADN(-/-)] adiponectin gene were used for comparison. It was found that PyVT(+/-)ADN(-/-)mice had earlier tumor onset time and larger tumor volume than PyVT(+/-)ADN(+/+) mice. Histological analysis has demonstrated that increased and more dispersed metastasis existed in lung tissue of PyVT(+/-)ADN(-/-)mice in comparing with PyVT(+/-)ADN(+/+)mice. The aggressiveness of adiponectin deficient tumor was preserved after implantation into immune-deficient mice. Gene expression and protein expression studies of PyVT tumor have indicated a different expression level and pattern of two important molecules: P63 and YY1.
In conclusion, tumor developed under microenvironment of adiponectin deficient will give rise to a more aggressive tumor. This tumor consistsof modified genotypes and phenotypes that are permanent and can be preserved after re-implantation into immuno-compromised mice.published_or_final_version
Pharmacology and Pharmacy
Master
Master of Medical Sciences
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LE, BON AGNES. "Mecanismes de l'infection, de l'activation et de la deletion clonale induite par mmtv(sw) chez la souris." Paris 6, 1997. http://www.theses.fr/1997PA066419.
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Le but de ce travail est l'etude des mecanismes de l'infection, de l'activation et de la deletion clonale induite par mmtv(sw) chez la souris. Nous avons d'abord cherche a comprendre pourquoi la deletion clonale induite par le superantigene code par mmtv(sw) etait retardee lors de l'infection neonatale (chronique ; via l'intestin) comparee a l'infection adulte (aigue ; voie sous-cutanee). Nous avons montre que la voie d'introduction virale n'avait pas d'effet et que la dissemination virale etait similaire dans les deux modeles. En revanche, nous avons demontre que les cellules neonatales presentaient une capacite de presentation des superantigenes reduite et une faible reactivite t. Lors de l'infection aigue, la reponse induite par mmtv(sw) se caracterise par une forte augmentation du nombre de cellules specifiques du superantigene. Ces cellules presentent un phenotype de cellules activees. Cependant, nous avons demontre que leur accumulation dans le ganglion drainant le point d'injection etait due a leur migration-sequestration plutot qu'a leur proliferation. Enfin, nous avons etudie les mecanismes de l'elimination des cellules t activees par le superantigene code par mmtv(sw). En effet, apres une phase initiale d'accumulation, les cellules reactives au superantigene disparaissent du ganglion drainant. Nous avons pu demontre que ces cellules ne mouraient pas sur leur site d'activation mais dans les organes lymphoides associes au tissu muqueux. L'ensemble de ces resultats permettent donc d'envisager un nouveau mecanisme d'elimination des cellules t cd4#+ activees in vivo.
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Rhoadarmer, Troy Allen. "Construction and testing of components for the 6.5 m MMT adaptive optics system." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284671.
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In recent years astronomers have been pushing to build larger ground-based telescopes with apertures greater than 5 m in order to see deeper into space and resolve smaller objects. Realistically, while a larger telescope aperture allows more light to be collected, atmospheric turbulence caused by thermal gradients in the atmosphere limits the achievable resolution to a level comparable with apertures on the order of half a meter or less. Adaptive optics (AO) can be used to counteract the degrading effects of the atmosphere in real time and recover diffraction-limited resolution. With the help of AO, better science can be done, and as more large ground-based telescopes are built, the need for reliable AO systems grows. The 6.5 m upgrade to the Multiple Mirror Telescope (MMT) on Mt. Hopkins is an example of a large telescope project. An infrared adaptive optics system for this telescope is currently under construction at Steward Observatory in the Center for Astronomical Adaptive Optics. This dissertation reports on the design, construction, and testing of various components of this AO system with which the author was involved. These components include the deformable secondary mirror, the wave front sensor, a laboratory testing system, and wavefront reconstruction algorithms.
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Marsaud, Véronique. "Etude des remaniements de la structure chromatinienne du promoteur du MMTV lors de son activation par les glucocorticoides." Paris 11, 1994. http://www.theses.fr/1994PA11T036.
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Henriksson, Mikael. "Implementation of a Hardware Coordinate Wise Descend Algorithm with Maximum Likelihood Estimator for Use in mMTC Activity Detection." Thesis, Linköpings universitet, Datorteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171071.
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In this work, a coordinate wise descent algorithm is implemented which serves the purpose of estimating active users in a base station/client wireless communication setup. The implemented algorithm utilizes the sporadic nature of users, which is believed to be the norm with 5G Massive MIMO and Internet of Things, meaning that only a subset of all users are active simultaneously at any given time. This work attempts to estimate the viability of a direct algorithm implementation to test if the performance requirements can be satisfied or if a more sophisticated implementation, such as a parallelized version, needs to be created.The result is an isomorphic ASIC implementation made in a 28 nm FD-SOI process, with proper internal word lengths extracted through simulation. Some techniques to lessen the burden on hardware without losing performance is presented which helps reduce area and increase speed of the implementation. Finally, a parallelized version of the algorithm is proposed, if one should desire to explore an implementation with higher system throughput, at almost no furtherexpense of user estimation error.
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Bertolino, Marcelo Koga. "Monitoramento in-line da formação de nanocompósitos PP/MMT via intercalação no estado fundido." Universidade Federal de São Carlos, 2008. https://repositorio.ufscar.br/handle/ufscar/783.
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Previous issue date: 2008-08-04Universidade Federal de Sao Carlos
The aim of this work is to monitor in-line, using an optical detector fitted at the extruder die exit, the formation of PP/MMT nanocomposites during polymer melt compounding. The intensity of the detector´s signal is dependent of the clay type (organofilization treatment), concentration and particle size, and so it is possible to monitor the presence of the clay tactoids due to their light extinction. The MMT clay is added as a pulse with constant weight into the PP extrusion flow and its presence is followed by the optical detector at the die exit. The data comes out as the common residence time distribution curves having its maximum intensity dependent upon the clay average particle size. On clay exfoliation the size of the tactoids are reduced to levels below the minimum particle size for producing light extinction and so the signal intensity reduces as the nanosize composite is formed. X-Ray diffraction analyses are used as offline monitoring of the nanocomposite formation. The results show that it is possible to use the optical detector to monitoring in-line the formation of nanocomposites.
O objetivo desse trabalho é avaliar e acompanhar em tempo real (in-line) o efeito da formulação e do perfil de rosca de uma extrusora dupla rosca no nível de desagregação, intercalação e esfoliação no estado fundido de uma argila montimorilonita (MMT) tratada e não tratada, na formação de nanocompósitos á base de polipropileno (PP). Por ser um polímero apolar, com pouca afinidade com a carga inorgânica, para que seja possível a esfoliação da argila, será utilizado um compatibilizante de polipropileno grafitizado com anidrido maleico (PP-g-MA). As argilas que foram utilizadas são as argilas comerciais Cloisite® (Na+, 15A, 20A e 30B) e uma outra argila proveniente da sinterização da argila Cloisite® 20A. A produção do nanocompósito foi realizada em uma extrusora dupla rosca Werner&Pfleiderer ZSK 30. Acompanhou-se a eficiência de produção do nanocompósito em tempo real in-line com o uso de um turbidímetro. Para quantificar o grau de esfoliação foi utilizado o método convencional off-line de análise por difração de raios X. Os resultados mostram que o turbidímetro é capaz de acompanhar as mudanças em tempo real da estrutura dos nanocompósitos obtidos a partir de um estímulo pulsado. O sinal obtido é dependente da concentração, do tipo de sal utilizado no tratamento de organofilização e da compatibilidade polímero/argila, modificada com o uso do compatibilizante.
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Martinez-Rodriguez, Fernando. "Mmt : un système de stéréovision anthropomorphe pour le calcul de cartes denses de profondeurs." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT115H.
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Nous présentons un système informatique, baptisé MMT, capable d'obtenir de façon fiable et précise une carte dense des profondeurs d'une scène observée par un capteur binoculaire anthropomorphe. Notre modèle de reconstruction d'une scène 3D se divise en deux sous-modèles : l'un pour le positionnement du capteur vis-à-vis de la scène observée et l'autre pour la mise en correspondance des deux images stéréoscopiques obtenues à partir d'un tel positionnement. Ce dernier est formalisé comme un problème d'optimisation combinatoire avec contraintes dont la solution représente la mise en correspondance la plus probable par rapport à l'ensemble des appariements possibles. Deux particularités de ce modèle de mise en correspondance sont d'une part l'approche fréquentielle par différences de phases pour engendrer des connaissances probabilistes sur la disparité et d'autre part le codage bidimensionnel des hypothèses sur le mode 3D : compatibilité-similarité, continuité-régularité. Deux techniques de résolution sont utilisées : le Recuit simulé et la Recherche tabou
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Lin, Chunqing. "Factors associated with successful implementation of the methadone maintenance therapy (MMT) programs in China." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1723178181&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
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Goble, William, and Ricardo Ortiz. "Characterization of an integrally wound tungsten and aluminum filament for physical vapor deposition." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622420.
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As part of the effort to increase the reliability of the MMT Observatory (MMTO) 6.5m Primary Mirror Coating System, the specified filament has changed from a configuration in which the aluminum charge is hand wound around a tungsten filament to a configuration in which the aluminum is integrally wound with the tungsten at the time of filament manufacture. In the MMTO configuration, this filament consists of the three strands of tungsten wire and one strand of aluminum wire. In preparation of a full system test utilizing two hundred filaments fired simultaneously, an extensive testing program was undertaken to characterize these filaments using a four filament configuration in the MMTO small coating chamber (0.5m) and then a forty filament configuration in the University of Arizona Steward Observatory coating chamber (2m). The testing using the smaller coating chambers has shown these filaments provide very predicable coatings from test to test, and with the proper heating profile, these filaments greatly reduce the likelihood of aluminum drips. The initial filament design was modified during the course of testing by shortening the unwound filament length to closer match the aluminum load required in the MMTO coating chamber. This change increased the aluminum deposition rates without increasing the power delivered of the filament power supplies (commercial welders). Filament power levels measured at the vacuum chamber feedthroughs, currents, and deposition rates from multiple coating tests, including a full system test, are presented.
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Vargas, Anamuro Cesar Augusto. "Etude du relayage entre terminaux pour la connectivité des objets dans les réseaux 5G." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0196.
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Les communications massives pour l’Internet des objets sont l'un des principaux services fournis par le réseau mobile de cinquième génération (5G). L’Internet des objets (IoT) représente un défi majeur pour les réseaux cellulaires car il se caractérise par un grand nombre d'objets connectés de faible complexité qui envoient de petits paquets de données. Ces objets connectés sont souvent alimentés par batterie, cette batterie devant fonctionner pendant de longues périodes sans avoir besoin d’être rechargée ou remplacée. Les réseaux cellulaires traditionnels, conçus pour les communications humaines, et pas assez économes en énergie, ne sont pas adaptés à ce type de service. Pour résoudre ce problème, dans cette thèse, nous étudions l'utilisation d’un équipement utilisateur de type smartphone comme relais pour transmettre les données de l’objet connecté à proximité. Ce mécanisme est appelé relayage D2D (Device-to-Device). Notre première étude a consisté à évaluer l'énergie consommée par l’objet connecté dans chaque phase du processus de communication lorsqu’il est localisé en bordure de cellule pour la technologie LTE-M. Ensuite, à l'aide d'un modèle simple, nous avons comparé la consommation d'énergie des modes de transmission cellulaire et D2D, et déterminé la localisation optimale du relais. Grâce à l'utilisation de la géométrie stochastique, nous avons ensuite analysé les performances d’une communication D2D utilisant les mécanismes de répétitions ARQ et CC-HARQ en termes de consommation d'énergie. Enfin, nous avons proposé un mécanisme de relayage D2D adapté aux applications IoT, en termes de complexité d’implémentation et de consommation d’énergie. Ce mécanisme utilise une approche de sélection de relais distribuée, qui priorise la sélection des relais bénéficiant des meilleures qualités de canalMassive machine-type communication (mMTC) is one of the main services delivered by the 5G mobile network. mMTC represents a major challenge for 5G network since it is characterized by a large number of low complexity devices thats end small data packets. Moreover, mMTC devices are often battery-powered, and the battery is expected to operate for long periods without being recharged or replaced. Traditional cellular networks, which are designed for human communications, are not energy efficient for this type of service. To address this problem, in this thesis, we study the use of Device-to-Device(D2D) relaying as a complementary transmission. In this approach, the mMTC device can transmit its data using a nearby UE as a relay. First, we calculate the energy consumed in each phase of the communication process for a device located at the cell border that uses LTE-Mtechnology. Then, using a simple model, we compare the energy consumption of cellular and D2D transmission modes, and we determine the optimal relay location. Through the use of stochastic geometry, we analyze the performance of D2D communication with ARQ and CC-HARQ with regard to the transmission success probability, the average number of transmissions, and MTD energy consumption. Finally, we propose an energy-efficient D2D relaying mechanism suitable for mMTC applications thanks to its easy implementation. This mechanism uses a distributed relay selection approach, which prioritizes the selection of the user equipments (UEs) with the best channel qualities. Moreover, we present a tractable model to evaluate the performance of our mechanism
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Illison, Eric Florian [Verfasser], and Klaus [Akademischer Betreuer] Mörike. "Die Rolle von SK4 und TRPM3 für die Proliferation von MMTV PyMT Brusttumorzellen / Eric Florian Illison ; Betreuer: Klaus Mörike." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1198121769/34.
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Illison, Eric [Verfasser], and Klaus [Akademischer Betreuer] Mörike. "Die Rolle von SK4 und TRPM3 für die Proliferation von MMTV PyMT Brusttumorzellen / Eric Florian Illison ; Betreuer: Klaus Mörike." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1198121769/34.
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Arroyave, Gabriel Jaime Peláez. "Influência da nanoargila (O-MMT) nas propriedades mecânicas de polipropileno reforçado com fibra de vidro." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/921.
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Previous issue date: 2014-07-01Financiadora de Estudos e Projetos
Hybrid filler reinforced thermoplastics composed with short glass fiber (GF) and different particulate fillers present special interest for engineering applications, as substantial reductions in mechanical anisotropy and molding warpage are expected from these systems as compared to the same characteristics inherent to binary composites with GF only. These improvements are achieved by the partial substitution of GF by particulate fillers and are attained at the cost of minor reductions in rigidity, strength and toughness properties of these ternary composites. However, when nanoscale fillers such as nanoclay (NC) are incorporated in GF-reinforced thermoplastics, the mechanical strength properties of these systems are severely affected, even at very low NC content. Thus in this work, using model GF-reinforced polypropylene (PP) composites with varying total and relative concentrations of GF and organophylic montmorillonite clay (O-MMT) along with maleated PP as compatibilizer were twin-screw extrusion compounded with three different mixing protocols, in order to identify the factors leading to the observed loss in mechanical strength properties. Using tensile, flexural, izod impact and dynamic-mechanical (DMTA) characterization tests and electron microscopy (SEM and TEM) elucidation of the fiber-matrix interface/interphase microstructure, it is concluded that the physical presence of NC particles at the interface contributes towards the reduction of interfacial interactions. As a consequence of low interfacial adhesion between the nanoclay and polymeric matrix, debonding of the particles and the PP during mechanical testing occurs, leading to crack growth that anticipates ternary hybrid composites failure in stress levels lesser compared with that of binary composites. These hypotheses were corroborated by SEM and TEM analyses.
Compósitos de termoplásticos com reforços híbridos de fibra de vidro (FV) curta e diversas cargas particuladas, tais como carbonato de cálcio, talco e esferas de vidro, apresentam características interessantes para aplicações de engenharia, já que se espera a redução substancial de problemas inerentes aos compósitos binários reforçados apenas com fibras, como são a anisotropia mecânica e o empenamento de peças moldadas por injeção. Tais aprimoramentos são alcançados mediante a substituição parcial da FV por carga particulada, porém, com leve decréscimo nas propriedades de resistência e tenacidade mecânica destes compósitos híbridos ternários. No entanto, quando reforços nanométricos, tais como nanoargilas, são incorporados em termoplásticos reforçados com FV, o efeito deletério nas propriedades de resistência e tenacidade é ainda mais crítico, inclusive em baixos teores do nanoreforço. Portanto, com o objetivo de identificar os fatores que levam à verificada queda de propriedades mecânicas, foram utilizados três protocolos diferentes de mistura para a preparação de compósitos híbridos ternários de polipropileno (iPP) reforçado com FV e nanoargila do tipo montmorilonita organofilizada (O-MMT), compatibilizados com PP funcionalizado com anidrido maleico, e variando a concentração total e relativa dos reforços. Para alcançar o objetivo traçado, foram usados ensaios de caracterização mecânica de curta duração (tração, flexão e impacto), termo-mecânica (HDT e DMTA) e elucidação microestrutural (MEV, MET). Concluiu-se que a presença física das partículas de O-MMT na proximidade da superfície das fibras tem efeito deletério na transferência de tensão cisalhante na interface fibra-polímero. Devido à relativamente baixa adesão interfacial existente entre a matriz e as partículas de nanoargila, durante a solicitação mecânica ocorre desacoplamento das partículas, dando lugar ao crescimento de trincas que antecipam a falha do compósito ternário em níveis de tensões menores que as sustentadas pelo compósito binário só com FV.
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Duarte, Emmy Lyra. "Movimento de Mulheres Trabalhadoras da Paraíba (MMT/PB): mobilização social, trabalho e relações de gênero." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/5852.
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Previous issue date: 2014-08-21Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
This paper aims to discuss the ideological process of formation of a particular subject to the present day: the rural women workers of the micro region at the Brejo Paraíbano . The Brejo in the 80s, rural women workers gain visibility through two specific movements: the Movement of Rural Women Workers from the Brejo (MMB) and the (MMT / PB) Movement of Women Workers of Paraíba. This period is depicted by the brutal advance of the capitalist system in Paraiba agrarian space through the monoculture of sugar cane and reflected on the expropriation and exploitation of peasants and farm workers. In response, the working class of Paraiba agrarian space and peasants reorganize themselves through certain representations of classes: the pastoral rural, rural trade unions and social movements. In the process of reorganization of the rural working class, rural women workers of Paraiba Heath identify the emergence of the debate about the conditions and the specific demands of female politicians in these spaces and in capitalist society that put them at double oppression: the woman and workers. To understand this process of formation of the agrarian space at the Brejo Paraiba and the organization of women as a class, and gender in two certain autonomous women's movement (MMB and MMT / PB) were important to the use of the methodology of bibliographic, documental and participatory research survey. The participatory research aimed to understand the main activities of training and debate exercised by MMT / PB with women rural workers today. For this, necessary methodological procedures as semi-structured interviews, informal conversations, analysis of documents (brochures, agendas of meetings, reports, brochures, videos), photographic archive and field research were. With this, we have seen the emergence of MMT / PB still bring in the current debate womanhood and working for rural women workers of Paraiba Heath and the need to reassess the main guidelines for performances of MMT / PB in the process of agglutination of these women for the establishment and continuation of the struggle of MMT / PB in Paraíba.
O presente trabalho tem como objetivo discutir o processo de formação político-ideológico de um determinado sujeito até os dias atuais: as mulheres trabalhadoras rurais da microrregião do Brejo Paraibano. No Brejo da década de 1980, as mulheres trabalhadoras rurais ganham visibilidade através de dois movimentos específicos: o Movimento de Mulheres Trabalhadoras Rurais do Brejo (MMB) e o Movimento de Mulheres Trabalhadoras da Paraíba (MMT/PB). Esse período é retratado pelo brutal avanço do sistema capitalista no espaço agrário paraibano através da monocultura da cana-de-açúcar e refletiu na expropriação e exploração dos camponeses e trabalhadores rurais da região. Em resposta, a classe trabalhadora do espaço agrário paraibano e os camponeses reorganizam-se através de determinadas representações de classes: os sindicatos rurais, as pastorais rurais e os movimentos sociais. Nesse processo de reorganização da classe trabalhadora rural, as mulheres trabalhadoras rurais do Brejo paraibano identificam a emergência do debate acerca das condições e das demandas específicas do gênero feminino nesses espaços políticos e na sociedade capitalista, que as colocam em dupla opressão: a de mulher e trabalhadora. Para compreender esse processo de formação do espaço agrário do Brejo paraibano e a organização das mulheres enquanto classe e gênero em dois determinados movimentos autônomos de mulheres (MMB e MMT/PB) foram importantes à utilização da metodologia de levantamento bibliográfico, documental e pesquisa participante. A pesquisa participante teve como principal objetivo compreender as principais atividades de formação e debate exercidos pelo MMT/PB junto às mulheres trabalhadoras rurais na atualidade. Para isso, foram necessários procedimentos metodológicos como entrevistas semiestruturadas, conversas informais, análises de documentos (cartilhas, pautas de reuniões, relatórios, folhetos, vídeos), arquivo fotográfico e pesquisa de campo. Com isso, pudemos constatar a emergência do MMT/PB em ainda trazer ao debate atual a condição de mulher e trabalhadora para as mulheres trabalhadoras rurais do Brejo paraibano e a necessidade de reavaliar as principais diretrizes de atuações do MMT/PB no processo de aglutinação dessas mulheres para a constituição e continuidade da luta do MMT/PB na Paraíba.
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Piazza, Diego. "Obtenção e caracterização de nanocompósitos de resina epóxi/montmorilonita (MMT) aplicados em tinta em pó." reponame:Repositório Institucional da UCS, 2011. https://repositorio.ucs.br/handle/11338/1031.
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A presente dissertação tem por objetivo apresentar um estudo quanto à influência da adição de nanocargas nas proprie!dades térmicas, morfológicas, físicas e anticorrosivas de tintas em pó base resina epóxi. Nanocompósitos poliméricos aplicados a tinta em pó com teores de 2 e 4 % de montmorilonita organofílica (OMMT) (p/p) foram obtidos no estado ·fundido em extrusora dupla-rosca co-rotante, em diferentes velocidades de processamento. As tintas em pó foram aplicadas em substratos de aço-carbono por pulverização eletrostática. Os resu ltados obtidos demonstram que os parâmetros utilizados para a cura em estufa (200 °C por 1 O minutos) das tintas foram satisfatórios, não sendo observados picos exotérmicos nos termogramas de calorimetria exploratória diferencial (DSC). As análises térmicas demonstraram que a incorporação de OMMT resultou no aumento da temperatura de máxima degradação para as amostras antes da cura, e apresentou pouca influência nos revestimentos após a cura, apresentando ainda redução da reatividade (b.Hreação) das tintas em pó base epóxi com o aumento da velocidade de processamento, de 200 para 400 rpm. As análises morfológicas de difração de raios X (DRX) e microscopia eletrônica de transmissão (MET) indicaram a presença de estruturas com predominância esfoliada para os nanocompósitos, com boa dispersão da OMMT na matriz epóxi. A incorporação dos teores de 2 % (p/p) de OMMT, para ambas as velocidades de! processamento, resultou em revestimentos com melhores propriedades de resistência ao impacto, resistência a flexibil idade e de brilho. Os revestimentos obtidos com teores de 4 % de OMMT (p/p) apresentarem melhor desempenho quanto às propri1edades térmicas e resistência a corrosão, conforme análises de TGA e de exposição à névoa salina, respectivamente. As medidas de migração subcutânea realizadas após o ensaio de exposição à névoa salina indicaram revestimentos com melhores propriedades de barreira para as amostras com OMMT, corroborado pelos resultados de espectroscopia de impedância eletroquímica (ElE).Submitted by Ana Guimarães Pereira (agpereir@ucs.br) on 2015-10-07T13:01:23Z No. of bitstreams: 1 Dissertacao Diego Piazza.pdf: 24298065 bytes, checksum: ceb0efa8d78e26b1bbd45581c9a739fe (MD5)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq
The objective of this dissertation is to present a study of the influence of the addition of nanoclays on thermal, morphological, physical and anticorrosive properties of powder coatings epoxy resin based. Polymeric nanocomposites applied of powder coatings with leveis of 2 and 4 % of orgianophilic montmorillonite (OMMT) (w/w) were obtained in the melt state in extruder twin-screw co-rotation at different processing speeds. The powder coatings were applied to carbon steel substrates by electrostatic spraying. The results show that the parameters used for curing (200 °C for 10 minutes) the coatings were satisfactory, exothermic peaks were not observed in thermograms of differential scanning calorimetry (DSC). Thermal analysis showed that the incorporation of OMMT resulted in increasing the temperature of degradation maximum for the samples before curinn, and little influence in coatings after curing, also reduces the reactivity (~H reaction) of powder coatings based epoxy with increasing processing speed (400 rpm). The morphological analysis of X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated the presence of predominantly exfoliated structures for the nanocomposites, with good dispersion of OMMT in the epoxy matrix. The incorporation of th~e leveis of 2 % of OMMT (w/w), for both processing speed, resulted in coatings with improved impact strength, endurance, flexibility and gloss. The coatings obtained with leveis of 4 % of OMMT (w/w) having better performance on the thermal proiPerties and corrosion resistance, as thermal analysis and exposure to salt spray, respectively. Measures of subcutaneous migration made after salt spray teslting indicated coatings with better barrier properties for samples with OMMT, with was corroborated by electrochemical impedance spectroscopy (EIS) results.
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Prevost, Grégoire. "Etude des interactions ADN-protéines dans la régulation de l'expression du gène béta globine de souris et du virus MMTV." Tours, 1989. http://www.theses.fr/1989TOUR4006.
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Pour comprendre les mécanismes gouvernant l'induction et la spécificité tissulaire d'expression du gène béta globine majeure de souris et du virus de la tumeur mammaire de souris, nous avons recherché les facteurs protéiques nucléaires capables de lier spécifiquement les séquences ADN de ces unités de transcription. Nous avons décrit une méthode de South Western Blot mapping permettant de détecter simultanément les polypeptides et les ADN impliqués dans ces interactions spécifiques. Deux groupes distincts de polypeptides liant le gène béta globine ont été caractérisés en fonction de l'état de différenciation des cellules de friend. 35, 95 et 100 kd sont les masses moléculaires de polypeptides détectés dans ces cellules n'exprimant ce gène. 110 et 75 kd sont celles des polypeptides détectés dans les cellules exprimant ce gène après un traitement in vivo différenciant. Les polypeptides détectés dans les cellules non différenciées se fixent dans une séquence fonctionnant in vivo comme reducer. La région distale du LTR de MMTV lie in vitro des protéines nucléaires spécifiques des cellules mammaires des souris GR dans des conditions natives d'interactions. Ceci est confirmé par la technique de south western blot. Quatre polypeptides (55, 40, 30, 25) des cellules mammaires se fixent dans cette région du LTR. Le traitement in vivo des cellules GR par la dexaméthasone ne modifie l'état de ces diverses interactions. Cette description d'interactions spécifiques des cellules mammaires semble confirmer l'implication de cette parité du LTR de MMTV dans la spécificité mammaire d'expression du virus.
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Elsherif, Mohamed Asaad. "Mapping multiplexing technique (MMT) : a novel intensity modulated transmission format for high-speed optical communication systems." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/33413/.
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There is a huge rapid growth in the deployment of data centers, mainly driven from the increasing demand of internet services as video streaming, e-commerce, Internet Of Things (IOT), social media, and cloud computing. This led data centers to experience an expeditious increase in the amount of network traffic that they have to sustain due to requirement of scaling with the processing speed of Complementary metal–oxide–semiconductor (CMOS) technology. On the other side, as more and more data centers and processing cores are on demand, as the power consumption is becoming a challenging issue. Unless novel power efficient methodologies are innovated, the information technology industry will be more liable to a future power crunch. As such, low complex novel transmission formats featuring both power efficiency and low cost are considered the major characteristics enabling large-scale, high performance data transmission environment for short-haul optical interconnects and metropolitan range data networks. In this thesis, a novel high-speed Intensity-Modulated Direct-Detection (IM/DD) transmission format named “Mapping Multiplexing Technique (MMT)” for high-speed optical fiber networks, is proposed and presented. Conceptually, MMT design challenges the high power consumption issue that exists in high-speed short and medium range networks. The proposed novel scheme provides low complex means for increasing the power efficiency of optical transceivers at an impactful tradeoff between power efficiency, spectral efficiency, and cost. The novel scheme has been registered as a patent (Malaysia PI2012700631) that can be employed for applications related but not limited to, short-haul optical interconnects in data centers and Metropolitan Area networks (MAN). A comprehensive mathematical model for N-channel MMT modulation format has been developed. In addition, a signal space model for the N-channel MMT has been presented to serve as a platform for comparison with other transmission formats under optical channel constraints. Especially, comparison with M-PAM, as meanwhile are of practical interest to expand the capacity for optical interconnects deployment which has been recently standardized for Ethernet IEEE 802.3bs 100Gb/s and in today ongoing investigation activities by IEEE 802.3 400Gb/s Ethernet Task Force. Performance metrics have been considered by the derivation of the average electrical and optical power for N-channel MMT symbols in comparison with Pulse Amplitude Modulation (M-PAM) format with respect to the information capacity. Asymptotic power efficiency evaluation in multi-dimensional signal space has been considered. For information capacity of 2, 3 and 4 bits/symbol, 2-channel, 3-channel and 4-channel MMT modulation formats can reduce the power penalty by 1.76 dB, 2.2 dB and 4 dB compared with 4-PAM, 8-PAM and 16-PAM, respectively. This enhancement is equivalent to 53%, 60% and 71% energy per bit reduction to the transmission of 2, 3 and 4 bits per symbol employing 2-, 3- and 4-channel MMT compared with 4-, 8- and 16-PAM format, respectively. One of the major dependable parameters that affect the immunity of a modulation format to fiber non-linearities, is the system baud rate. The propagation of pulses in fiber with bitrates in the order > 10G, is not only limited by the linear fiber impairments, however, it has strong proportionality with fiber intra-channel non-linearities (Self Phase Modulation (SPM), Intra-channel Cross-Phase Modulation (IXPM) and Intra-channel Four-Wave Mixing (IFWM)). Hence, in addition to the potential application of MMT in short-haul networks, the thesis validates the practicality of implementing N-channel MMT system accompanied by dispersion compensation methodologies to extend the reach of error free transmission (BER ≤ 10-12) for Metro-networks. N-Channel MMT has been validated by real environment simulation results to outperform the performance of M-PAM in tolerating fiber non-linearities. By the employment of pre-post compensation to tolerate both residual chromatic dispersion and non-linearity, performance above the error free transmission limit at 40Gb/s bit rate have been attained for 2-, 3- and 4-channel MMT over spans lengths of up to 1200Km, 320 Km and 320 Km, respectively. While, at an aggregated bit rate of 100 Gb/s, error free transmission can be achieved for 2-, 3- and 4-channel MMT over spans lengths of up to 480 Km, 80 Km and 160 Km, respectively. At the same spectral efficiency, 4-channel MMT has realized a single channel maximum error free transmission over span lengths up to 320 Km and 160 Km at 40Gb/s and 100Gb/s, respectively, in contrast with 4-PAM attaining 240 Km and 80 Km at 40Gb/s and 100Gb/s, respectively.
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Monwell, Bodil. "De sökte substitutionsbehandling-vad skiljde dem åt? : Jämförelse i bakgrundsfaktorer mellan opiat- och opioidberoende utifrån ASI-intervjuer." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för beteendevetenskap och socialt arbete, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-19104.
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Through changes in the code of statutes, SOSFS 2009:27 (M), opioid addicts are excluded since March 1 2010 from possibilities to be accepted for substitution treatment. Opiate addicts are solitary admitted for substitution treatment from that date. Opioid addicts are excluded admission for treatment regardless of the fact that they fulfil the ICD-10 diagnosis F.11.2, i.e. opioid/opiate addictive criteria. The alteration in the statutes was carried out in reference to the fact that evidence for this kind of treatment intended for opioid addicts was missing. Both groups i.e. opiate – and opioid addicts, are nevertheless experienced in clinical work , to have extensive problems with addiction, health, social situation along with the risk of premature death. The purpose with this study is to identify what differences and/or similarities there are in background varieties and the severity of the problems between the groups. This is conducted with the use of a population (n=127) with comparable background material, e.g. collected Addictions Severe Index- interviews, scientifically survey and compare background factors and the severity of the problems. The main discovery in this study is that one can demonstrate great similarities between the groups regarding background as well as the severity of the problems. It is therefore of great interest, on a individual as well as a social oriented level, that pursued studies regarding diagnostic safety and on processes in substitution program are needed to generate further knowledge as a foundation for development of future care and changes in the code of statutes.
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HOSHINO, MUNEMITSU, MUTSUSHI MATSUYAMA, OSAMU TAGUCHI, MORIAKI KUSAKABE, WORAWIDH WAJJWALKU, JIN LU, TOYOHARU YOKOI, et al. "Establishment and Characterization of Immortalized Non-Transplantable Mouse Mammary Cell Lines Cloned from a MMTV-induced Tumor Cell Line Cultured for A Long Duration." Nagoya University School of Medicine, 1991. http://hdl.handle.net/2237/17515.
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LEE, KYONG-IL. "Identification et caracterisation d'un element enhancer tissu-specifique potentiel dans le ltr du provirus de la tumeur mammaire de souris (mmtv)." Paris 6, 1990. http://www.theses.fr/1990PA066203.
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Depuis longtemps, des etudes variees ont suggere la presence d'un element regulateur tissu-specifique situe en dehors des sites de fixation des recepteurs dans les virus de tumeur mammaire de souris (mmtv). Par une experience de protection a dnase 1, nous avons identifie un nouveau site de fixation des proteines nucleaires: la sequence 5 gggtttaaataagttta 3: appelee motif kyong-il, enregistre a l'embl sous le n#o16475) positionnee de 204 a 188, juste en amont de la sequence consensus de l'element de reponse aux glucocorticoides distal (gre). Etonnement, nous avons vu qu'elle est composee de 2 sequences du promoteur de l'hormone de croissance: le motif gggtttaaa et l'octamere. L'experience de retard sur gel montre que de nombreuses proteines nucleaires se fixent a cette sequence avec des specificites tissulaires differentes. De plus, l'activation de cette sequence par les glucocorticoides est induite par une faiblesse de l'affinite de liaison ou par une elimination d'un suppresseur en ce site. Plus frappant, c'est que cette sequence alteree dans toutes les tumeurs non mammaires induites par une infection par ce virus: on observe soit une deletion, soit une substitution, soit une troncature, soit une repetition en tandem, montrant une selection evolutive. En somme, les resultats montrent que cette sequence agit en synergie avec le gre distal pour conduire a l'expression tissu-specifique. On suggere donc que cette sequence est un element enhancer tissu-specifique du mmtv relatif provirus
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Crepaldi, Eduardo Antônio. "Influência do fator de cobertura nas propriedades de permeabilidade de tecidos planos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/100/100133/tde-06122018-161422/.
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Este projeto, \"Influência do fator de cobertura nas propriedades de permeabilidade de tecidos planos\", descreve um breve histórico sobre a Tecelagem e seu crescimento na indústria Têxtil mundial, sendo muito importante o seu desenvolvimento para a indústria. Será apresentado também o conceito sobre Fator de cobertura de tecidos planos. Com o objetivo de avaliar a correlação entre o fator de cobertura e a permeabilidade dos tecidos planos, foram desenvolvidas 18 amostras de tecido com fio 60/2 Ne 100% agodão no urdume e na trama, em ligamento tela, sarja e cetim com densidades de trama 16tramas/cm, 24tramas/cm e 32tramas/cm, e com densidade de urdume 16fios/cm e 32fios/cm . Foi calculado o fator de cobertura para todas as amostras e foram realisados ensaios de gramatura, permeabilidade ao ar, permeabilidade ao vapor de água e permeabilidade a água, com a observação do indice OMMC (Capacidade de gestão global de umidade) do aparelho MMT (Moisture Management Tester). Este estudo se mostra como um caminho na Utilização do fator de cobertura, como item a ser considerado no desenvolvimento de novos artigos. Os resultados mostram para cada ligamento e fator de cobertura o comportamento com relação à permeabilidade dos TecidosThis project, \"Influence of the coverage factor on the properties of permeability of woven\", describes a brief history on Weaving and its growth in the world textile industry, being very important its development for the industry. The concept of woven coverage factor, will also be presented. In order to evaluate the co-relation between the coverage factor and the permeability of woven, 18 wovens samples were developed with 60/2 Ne 100% cotton thread in the warp and the weft, inwoven twill and satin weave with warp weights 16 yarn/cm, 24 yarn/cm and 32 yarn/cm and with warp density 16 yarn/cm and 32yarn/cm. The coverage factor was calculated for all samples and weight, air permeability, water vapor permeability and water permeability tests were performed with the observation of the OMMC (Global Moisture ManagementCapacity) index of the MMT (Moisture Management Tester).This study shows as a path in the use of the coverage factor, as an item to be considered in the development of new articles. The results show for each ligament and cover factor the behavior regarding the permeability of the wovens
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Ranade, Ajit. "Polyamide-imide and Montmorillonite Nanocomposites." Thesis, University of North Texas, 2001. https://digital.library.unt.edu/ark:/67531/metadc2873/.
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Solvent suspensions of a high performance polymer, Polyamide-imide (PAI) are widely used in magnetic wire coatings. Here we investigate the effect that the introduction of montmorillonite (MMT) has on PAI. MMT was introduced into an uncured PAI suspension; the sample was then cured by step-wise heat treatment. Polarized optical microscopy was used to choose the best suitable MMT for PAI matrix and to study the distribution of MMT in PAI matrix. Concentration dependent dispersion effect was studied by x-ray diffraction (XRD) and was confirmed by Transmission electron microscopy (TEM). Differential scanning Calorimetry (DSC) and Thermogravimetric analysis (TGA) was used to study impact of MMT on glass transition temperature (Tg) and degradation properties of PAI respectively. Micro-hardness testing of PAI nanocomposites was also performed. A concentration dependent state of dispersion was obtained. The glass transition (Tg), degradation and mechanical properties were found to correlate to the state of dispersion.
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Cox, Rachel E. "Plasticity in Animated Children’s Cartoons: The Neoliberal Transforming Bodies and Static Worlds of OK KO and Gumball." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7769.
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Through the study of OK KO! Let’s Be Heroes! and The Amazing World of Gumball, I argue that children’s cartoons represent and recreate anxieties toward money’s plasticity in the plasticity of the cartoon bodies and worlds. I closely examine the ambivalence towards abstraction’s plasticity in contemporary children’s cartoons to trace the neoliberal ambivalence towards money’s plasticity. While much scholarship has grappled with what can be understood as animatic plasticity, very little of it takes on the questions raised about neoliberal culture by televised children’s cartoons. Cartoons are important to study in this respect because their form allows for unbridled plasticity. Cartoons provide the artists with the freedom to create characters and worlds that are as bound or unbound to our world’s norms and natural laws, unlike in other live action moving media. It combines this with the dynamic, temporal component of moving image media. Unlike a surreal painting, cartoons are capable of dynamic movement and transformation, even in their non-moving image form as comics. However, this plastic dynamism is most fully realized in the animated form, as the characters are capable of movement and change regardless of the viewers’ presence. Contemporary cartoons like OK KO and Gumball asymmetrically mobilize this plasticity by rendering the characters’ bodies as highly plastic while presenting their worlds as comparatively static. This aesthetic practice suggests that the world cannot be reshaped for a variety of reasons, so the only thing that individuals can do is try to change themselves as necessary to accommodate it. Thus, what at first blush looks like a celebration of plasticity is in reality a celebration of mere flexibility, which enables and perpetuates neoliberal power structures. Yet these same shows simultaneously challenge the neoliberal aesthetic project in their hyper-mobilization of non-diegetic plasticity. When the shows mobilize their plasticity in a way that is not narratively impactful, such as through cutaways, inserts, or other asides, the plasticity is instead framed as comedic and thus enjoyable. This suggests that while presenting character and world plasticity as equally valid would be natural next step for animated aesthetics, the major limitation contemporary animation faces is in reality the uneven treatment of diegetic and non-diegetic plasticity.
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Garcia, Ramos G. Daniel. "The use of MMT in Mexico, a first approach to estimate the social, environmental and economic effects." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ59500.pdf.
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Frampton, Daniel John. "An Investigation into Automatic Dynamic Memory Management Strategies using Compacting Collection." Thesis, 2003. http://hdl.handle.net/1885/39951.
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Modern object oriented languages such as Java and C# have been gaining widespread industry support in recent times. Such languages rely on a runtime infrastructure that provides automatic dynamic memory management services. The performance of such services is a crucial component of overall system performance. This thesis discusses work undertaken in relation to automatic memory management using the Java Memory Management Toolkit (JMTk) running on the Jikes Research Virtual Machine (Jikes RVM). The primary goal of this work was to develop an automatic memory management strategy employing a compacting collector to run on this platform. Compacting collectors are an important class of collectors used in several production runtimes, including Microsoft's Common Language Runtime and IBM's Java Runtime Environment. The development of a strategy using compaction makes an important contribution to JMTk, and provides a platform where side-by-side comparisons between compacting collectors and other important classes of collector can be made. A compacting collector differs from the collectors that currently exist in JMTk in several important ways. Prior to this work, JMTk and Jikes RVM did not have an implementation of a compacting collector, nor the structure to fully support one. This work has achieved its primary goal in providing an implementation of a compacting collector. It describes how both JMTk and Jikes RVM were modified to support such collectors. Although substantial, this project should be considered but a first step into the investigation of this class of collectors. It is anticipated that through broadening the set of operations supported by JMTk and Jikes RVM that this work will also allow new classes of collectors to be implemented and compared. The cost of performing a compacting collection was shown to be very significant given the current implementation. The use of compaction in a generational collector demonstrated increased performance, bringing it in-line with other generational collectors in JMTk. This work shows that there are benefits in reducing memory fragmentation through the use of compacting collectors. When discounting the cost of the collection, the implemented compacting collectors come close to matching or outperforming other collection strategies. The difficulty now lies in attempting to reduce the cost of compacting collection.
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Quinane, Luke. "An Examination of Deferred Reference Counting and Cycle Detection." Thesis, 2003. http://hdl.handle.net/1885/42030.
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Object-oriented programing languages are becoming increasingly important as are managed runtime-systems. An area of importance in such systems is dynamic automatic memory management. A key function of dynamic automatic memory management is detecting and reclaiming discarded memory regions; this is also referred to as garbage collection. A significant proportion of research has been conducted in the field of memory management, and more specifically garbage collection techniques. In the past, adequate comparisons against a range of competing algorithms and implementations has often been overlooked. JMTk is a flexible memory management toolkit, written in Java, which attempts to provide a testbed for such comparisons. This thesis aims to examine the implementation of one algorithm currently available in JMTk: the deferred reference counter. Other research has shown that the reference counter in JMTk performs poorly both in throughput and responsiveness. Several aspects of the reference counter are tested, including the write barrier, allocation cost, increment and decrement processing and cycle-detection. The results of these examinations found the bump-pointer to be 8% faster than the free-list in raw allocation. The cost of the reference counting write barrier was determined to be 10% on the PPC architecture and 20% on the i686 architecture. Processing increments in the write barrier was found to be up to 13% faster than buffering them until collection time on a uni-processor platform. Cycle detection was identified as a key area of cost in reference counting. In order to improve the performance of the deferred reference counter and to contribute to the JMTk testbed, a new algorithm for detecting cyclic garbage was described. This algorithm is based on a mark scan approach to cycle detection. Using this algorithm, two new cycle detectors were implemented and compared to the original trial deletion cycle detector. The semi-concurrent cycle detector had the best throughput, outperforming trial deletion by more than 25% on the javac benchmark. The non-concurrent cycle detector had poor throughput attributed to poor triggering heuristics. Both new cycle detectors had poor pause times. Even so, the semi-concurrent cycle detector had the lowest pause times on the javac benchmark. The work presented in this thesis contributes to an evaluation of components of the reference counter and a comparsion between approaches to reference counting implementation. Previous to this work, the cost of the reference counter's components had not been quantified. Additionally, past work presented different approaches to reference counting implementation as a whole, instead of individual components.
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Cheng, Chao-hung, and 鄭潮鴻. "Prepared-Characterized-MechanicalProperties of LLDPE/MMT and LDPE/MMT Nanocomposites." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/70905886159247068479.
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碩士清雲科技大學
機械工程研究所
97
This experiment uses a plastograph-mixer with the twin-screw mixed method to obtain standard shaped specimens of Polymer-Clay Nanocomposites (PCN), used in the preparation of LDPE/MMT and LLDPE/MMT nanocomposites pellets grafted with two kinds of different surfactant dicumyl peroxide (DCP) or Maleic Anhydride (MA). Using the processes of wide-angle powder X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), the chemical structure and polymer morphology of these as-synthesized PCN specimens was characterized. In addition, we made these experiment materials in order to probe into its mechanical properties. The tests used are: layer distance of PCN, tensile, deflects, impact, Shore-hardness and wearing tests. After the experiment, it was found that these specimens grafting the MA and DCP have the following results: In the tensile test, the MMT weight percentage 5wt% has the best result; it increased by 105.67%. In the impact test, the MMT 1wt% strengthened 77.45%. In the hardness test, the MMT 3wt% decreased the effect by 0.96%. In addition, the specimens that graft to the MA have the following results: In the tensile test, the MMT 1wt% strengthened by 5.43%. In the impact test the MMT 3wt% strengthened by 19.74%. In the hardness test, the MMT 5wt% strengthened by 10.85%. LLDPE/MMT nanocomposites pellets, grafting with two kinds of different surfactant DCP and MA. It was discovered that the specimens grafted to the DCP have the following results: In the tensile test, the MMT weight percentage 3wt% has the best result, increasing by 45.31%. In the impact test, the MMT 1wt% decreased 2.58%. In the hardness test, as the MMT content increases, the hardness decreases.
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Cheng, Chao-hung, and 鄭潮鴻. "Prepared-Characterized-Mechanical Properties of LLDPE/MMT and LDPE/MMT Nanocomposites." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/92884421728578814565.
Full textAbstract:
碩士清雲科技大學
機械工程系所
97
This experiment uses a plastograph-mixer with the twin-screw mixed method to obtain standard shaped specimens of Polymer-Clay Nanocomposites (PCN), used in the preparation of LDPE/MMT and LLDPE/MMT nanocomposites pellets grafted with two kinds of different surfactant − dicumyl peroxide (DCP) or Maleic Anhydride (MA). Using the processes of wide-angle powder X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), the chemical structure and polymer morphology of these as-synthesized PCN specimens was characterized. In addition, we made these experiment materials in order to probe into its mechanical properties. The tests used are: layer distance of PCN, tensile, deflects, impact, Shore-hardness and wearing tests. After the experiment, it was found that these specimens grafting the MA and DCP have the following results: In the tensile test, the MMT weight percentage 5wt% has the best result; it increased by 105.67%. In the impact test , the MMT 1wt% strengthened 77.45%. In the hardness test, the MMT 3wt% decreased the effect by 0.96%. In addition, the specimens that graft to the MA have the following resul ts: In the tensile test, the MMT 1wt% strengthened by 5.43%. In the impact test the MMT 3wt% strengthened by 19.74%. In the hardness test, the MMT 5wt% strengthened by 10.85%. LLDPE/MMT nanocomposites pellets, grafting with two kinds of different surfactant − DCP and MA. It was discovered that the specimens grafted to the DCP have the following results: In the tensile test, the MMT weight percentage 3wt% has the best result, increasing by 45.31%. In the impact test , the MMT 1wt% iii decreased 2.58%. In the hardness test, as the MMT content increases, the hardness decreases.
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Tung, Shis-Shuan, and 童士軒. "Prepared-Characterized-Mechanical-Thermal Properties of PPgMA/MMT and HDPE/MMT Nanocomposites." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/47624980653045059909.
Full textAbstract:
碩士清雲科技大學
機械工程研究所
97
This experiment used the melt-mixing layer of interpolation procedure, to prepare the modified polypropylene (PPgMA) / montmorillonite (MMT), high-density polyethylene (HDPE) / montmorillonite nano-clay complex of the polymer material (PCN), and to explore their mechanical properties. PPgMA as well as HDPE are matrix materials; add Bai Kong (BAI KONG, PK-8342) MMT to strengthen the material. Also, use HDPE and maleic anhydride (MA) as the surfactant interface. Afterward, start to add the agentsdicumylperoxide (DCP), which modifies the hot plastic spectrometer after the mixing method PCN test piece is prepared in order to explore weight percentage while adding different percentages of MMT, and the DCP, which contains research inter-layer distance and mechanical properties that determine the best of one's concentration and processing parameters. In order to understand and improve these soft and weak mechanical properties of HDPE, first we add MMT as reinforcement material, and then use MA and DCP as the surfactant; to join the pieces of HDPE together, making it acquire polarization. After that, use a Plastograph-Mixer with the twin-screw mixed method to obtain standard shaped specimens of Polymer-Clay Nanocomposites (PCN) to prepare HDPE / MMT nanocomposites pellets. By adding the different weight percentages (1, 3, 5wt%) of MMT, and 2:1 of MA and MMT, the layer distance of MMT and mechanical property of nanocomposites was investigated. The test shows that the hardness and wear-resistance have a good linear relationship with the HDPE / MMT nano-complex material, the higher hardness will have higher wear-resistance. Also, joining the DCP after modified the rigid reinforced HDPE, HDPE base material will significantly improve their impact strength, hardness, wear intensity, excluding the reduce on the tensile strength. As a result of improving on the wear resistance, impact strength, and hardness, the products life cycle and safety issue will increase. In addition when PPgMA / MMT nano-complex material, the hardness improved significantly as 1wt%, and decrease when 3 and 5 wt%. But the tensile strength decreased with the increase in hardness, the results showing with the general perception of the nature of the soft and firmware is different.
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Wen, Chi-Chien, and 溫吉捷. "Prepared-Characterized-Mechanical-Thermal Properties of PPgMA/MMT and LLDPE/MMT Nanocomposites." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/91247721949554412090.
Full textAbstract:
碩士清雲科技大學
機械工程所
100
In this study, the modified polypropylene (PPgMA) / montmorillonite (MMT), linear-low-density polyethylene (LLDPE) / montmorillonite (MMT) nano-clay complex of the polymer material (PCN) are produced by the method of melt-mixing layer of interpolation, and explored their mechanical and thermal properties. PPgMA as well as LLDPE were matrix materials; added MMT to strengthen the material. Besides, the maleic anhydride (MA) was used as the surfactant interface and the agents of dicumylperoxide (DCP) were added into LLDPE that modifies the hot plastic spectrometer. After the blending and hot-compressing, the PCN sample was prepared and explored weight percentage while adding different percentages of MMT, and the DCP, which contains research mechanical and thermal properties that determine the best of one''s concentration and processing parameters. In order to understand and improve mechanical properties of PpgMA and LLDPE, first we added MMT as reinforcement material, and then used MA and DCP as the surfactant; by joining the pieces of LLDPE together, it acquired polarization. By adding the different weight percentages (1, 3, 5 wt.%) of MMT, and 2:1 of MA and MMT, the nanocomposites with added various concentrations of MMT and its mechanical properties was investigated. Through the experimental results, hardness of PPgMA/MMT nano-composite increases obviously at 1wt.%, but starts to decrease at 3wt.% and 5wt.%. Tensile strength decreases with hardness increases. It confirms that properties of softness and toughness are different. The anti-impact test results of LLDPE/MA/MMT/DCP shows that the absorbing energies are -2.58 % (1.0 wt.%), -12.77% (3.0 wt.%), and -38.30 % (5.0 wt.%). The anti-impact decreases with increasing of MMT concentration. It proves that when adding MMT into PPgMA makes enthalpy increase by thermal analysis. The values of enthalpy are 91.17 J/g (1 wt%), 73.74 J/g (3 wt%), and 99.94 J/g (5 wt%). Enthalpy has the maximum as MMT is at 5 wt.%, which reaches to 8.75%; the enthalpy of LLDPE substrate is 2.48 J/g. After adding MMT, the enthalpy decreases to 37.97 J/g (1 wt%), 42.81 J/g (3 wt%), and 5.406 J/g (5 wt%). Compared to LLDPE, the change of enthalpy value is -0.87%.
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Ali, Almas Fatima 1986. "Characterization of the MMTV-encoded Rem protein." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-1345.
Full textAbstract:
Mouse mammary tumor virus (MMTV) is a betaretrovirus that causes mammary tumors in mice. MMTV is the only known complex murine retrovirus and encodes Rem, an HIV-1 Rev-like protein. Rem is a 301-amino-acid (33 kDa) protein that is cotranslationally targeted to the ER, where the first 98 amino acids constitute the signal peptide (SP). The SP is cleaved and retrotranslocated to the cytoplasm prior to nuclear entry. In this thesis, the results show that the presence of a leucine at position 71 allows more efficient cleavage of SP and increases Rem activity. Further, in Rem-transfected cells, the majority of SP appears in the nuclear fraction, consistent with fluorescent microscopy data. The C-terminal fragment of Rem (RemCT) is glycosylated in the ER and, although glycosylation sites are present outside the SP, mutations of both these sites abolish SP activity in a reporter assay. Indirect evidence suggests that unglycosylated RemCT is degraded by the proteasome, whereas glycosylated RemCT is likely secreted out of the cell. A variant of MMTV (TBLV) that lacks functional Sag and RemCT has been prepared and will be studied in mice to elucidate the role of RemCT in vivo. Development of an antibody to RemCT will allow tracking of the protein in virus-producing cells. Although there are many other similarities between complex retroviruses like HIV-1 and MMTV, current evidence suggests that Rem lacks an HIV Tat-like transactivator function.text
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Lin, Wei-Fan, and 林惟凡. "Synthesis and characterization of microcellular injection molded PP/MMT and PPgMA/MMT nanocomposites." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/23g425.
Full textAbstract:
碩士健行科技大學
機械工程系碩士班
105
Montmorillonite (MMT) is one of the clay material which has several functions like mechanical strength enhamcement, gas barrier, anti-corrision, and anti-bacterial. So it is a good candidate in several applications.This study investigated the effects of MMT (0.5, 1, 3 wt.%) loading on the tensile strength/thermal properties of microcellular injection molded PP and PPgMA composites. The injection molding process was done by non-foam and microcellular molding. Results showed that the dispersion from TEM pictures, some of MMT are intercalated and some of them are exfoliated structures. XRD results showed that PPgMA can increased more D-spacing of clay layers than that of PP material. This 0.5 wt % loading of MMT had the best tensile strength for solid molding while it is 1.0 wt.%. loading for microcellular molding on PP material. However, it had best tensile strength for the 1.0 wt% MMT loading on PPgMA material. This is the results of MA grafted PP. Tensile strength is related to the filler dispersion in the matrix. Good dispersion resulted in good tensile strength. They had the highest storage modulus for 0.5 wt% MMT loading both for PP/MMT and PPgMA/MMT nanocomposites from the DMA test results. TGA results showed that thermal degradation can be increased with addition of MMT both for PP/MMT and PPgMA/MMT nanocomposites. Capillary rheometer test results showed that viscosity decreased with the addition of MMT, so the MMT served as a lubricant. SEM morphorogy showed that with addition of MMT, cell size decreased and cell density increased. MMT served as the nucleation agent.