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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Role of src splice variants in nerve terminal function

Abdelhameed, Taher January 2010 (has links)
Src is a 60 kDa tyrosine kinase that is expressed in most of animal tissues. Src has three splice variants, C-src, which is ubiquitously expressed, and N1- and N2-src, which are neuronal specific splice variants. The srcs are differentially spliced at their SH3 domains, therefore the hypothesis is that this splicing allows them to have different binding partners and perform different roles in neurons. The aim of this project is to identify new interactions for the three src splice variants in neurons and their possible functional roles. The SH3 domains, kinase active truncated proteins ( 80) and kinase dead mutant full length versions of the three splice variants of src were cloned from a rat brain cDNA library into bacterial expression vectors. GST-pull downs from nerve terminal lysates showed that different src splice variants had different binding partners. These partners were identified by mass spectrometry and confirmed by western blotting. C-src binding partners included dynamin, synapsin, and synaptojanin, while N2-src binding partners included synaptophysin, Munc18-1, and NSF. The interaction between N2-src and Munc 18-1 was characterized further; however a number of in vitro interaction assays and kinase assays showed that Munc 18-1 may not be a direct binding partner for N2-src or substrate. N1-src displayed a stimulation-dependent interaction with dynamin I. This was shown to be phosphorylation-dependent in contrast to C-src binding. The major phosphorylation sites on dynamin I, S774 and S778, were not involved in the regulation of N1-src binding. The binding site for N1-src on dynamin I was different to C-src, with extensive mutagenesis studies suggesting that the interaction site is at the tail of the dynamin I xa splice variant, which has an additional two phosphorylation sites.
112

Approches directes et planifiées de l'interaction 3D sur terminaux mobiles

Decle, Fabrice 23 September 2009 (has links)
Les récentes évolutions technologiques des terminaux mobiles tels que les téléphones portables, assistants personnels ou GPS, ont été très importantes. Il est aujourd’hui possible d’af?cher en temps réel des scènes 3D complètes sur de tels appareils. Cependant, les spéci?cités ergonomiques et techniques des appareils mobiles risquent de rendre l’interaction avec l’environnement 3D dif?cile à réaliser ef?cacement. En particulier, les techniques d’interaction 3D développées pour les ordinateurs de bureau risquent de souffrir de l’absence de souris. Dans ce mémoire, nous nous intéresserons aux contraintes et aux spéci?cités des ter- minaux mobiles et étudierons leur in?uence pour des tâches d’interaction 3D. La première partie du mémoire constitue une introduction aux différents domaines abordés dans cette thèse. Nous y dé?nirons le terme de “terminal mobile” et aborderons les spéci?cités technologiques et ergonomique de ces appareils. Nous introduirons également les notions essentielles de géométrie et d’interaction 3D. Nous nous intéresserons dans un second temps à l’interaction 3D avec un contrôle direct, utilisé dans beaucoup d’applications 3D. Dans ce mode d’interaction, les actions de l’utilisateur produisent des modi?cations dans l’environnement 3D en temps réel. Après une analyse de l’existant, nous présenterons nos travaux avec une technique d’inspection de modèles 3D qui utilise des informations telles que la profondeur ou la présence de contours dans l’image a?n de calculer des mouvements de caméra adaptés au contexte. La suite de la deuxième partie sera consacrée à l’étude de l’apport de l’utilisation de deux doigts sur un écran tactile multi-points. La troisième et dernière partie de ce mémoire est consacrée à l’interaction 3D “plani?ée”. Ce mode d’interaction est plus adapté aux contraintes des terminaux mobiles et possède l’avantage d’offrir une interaction d’un plus haut niveau que ne l’offre le contrôle direct. Nous verrons dans cette partie la dé?nition exacte de ce mode d’interaction, ainsi que les différences, les forces et les faiblesses de cettemanière d’interagir avec un environnement 3D. Nous présenterons dans cette partie nos contributions, à savoir une technique de sélection de point 3D utilisable à l’aide des touches de l’appareil, ainsi qu’une technique de placement de caméra simple à utilisermais offrant un contrôle avancé, qui permet aux utilisateurs, novices ou experts, de spéci?er un point de vue à l’aide de quelques gestes simples seulement. / Mobile devices, such as phones, PDAs or GPS, are getting more and more powerful. They are now able to compute and to display 3D scenes in real time. However, mobile devices’ ergonomics and technical limitations may make 3D interaction hard to achieve ef?ciently. In particular, 3D interaction techniques developed for desktop computers may be affected by the lack of mouse. In this thesis, we will study mobile devices’ constraints and speci?cities, and their in?uences on 3D interaction tasks. The ?rst part of this thesis will be an introduction to the domains addressed in this thesis. We will de?ne the term “mobile device” and analyze their technical and ergonomic speci?cities. We will also de?ne some 3D geometry and 3D interaction basis. In the second part of the thesis, we will talk about 3D interaction with direct control, which is used in many 3D applications, where the user’s actions induce modi?cations into the 3D environment in real time. After presenting the related works, we will introduce a 3D inspection technique we have developed. This technique uses depth and contours information in order to compute camera movements adapted to the current context. The following of this second part will be dedicated to a study about bene?ts of using two ?ngers on a multitouch screen. The third part of this thesis is dedicated to “planned 3D interaction”. This kind of control is more adapted to the mobile devices’ constraints and offers a higher level of interaction than direct control. We will de?ne and analyze planned 3D interaction in this part. We will then present our contributions : a key based 3D navigation technique, and a 3D camera positioning technique based on some gestures which allows both expert and novice users to easily specify a point of view.
113

Factores asociados a la actitud del profesional de enfermería ante la muerte del paciente terminal

García Rojas, Maribel January 2016 (has links)
La Organización Mundial de la Salud, estima que hay 35 millones de pacientes que requieren cuidados paliativos con el fin de disminuir el sufrimiento corporal y espiritual de los mismos. Los profesionales de enfermería son los que a diario entran en contacto con ellos y por lo tanto, deben estar preparados para acompañarlos de forma humanizada, sin embargo, se percibe cierta lejanía y distanciamiento. Objetivo: Determinar los factores asociados a la actitud del profesional de Enfermería, ante la muerte del paciente terminal del Hospital Nacional Dos de Mayo. Metodología: La investigación es de tipo aplicada, con enfoque cuantitativo y diseño correlacional. Se aplicó el muestreo no probabilístico, la muestra está conformada por 60 profesionales de Enfermería. La técnica utilizada fue la encuesta y el instrumento es el cuestionario utilizando dos formularios: uno para medir los factores elaborado por la misma investigadora y el otro para medir la actitud del profesional de Enfermería usando el Cuestionario de Actitudes ante la Muerte (CAM) de Templer (1970) aplicado en Cuba, luego revisado y modificado por Hernández (2002). La recolección de datos se realizó en octubre 2015. Resultados: El 55% del profesional de enfermería tienen entre 31 a 40 años, el 70% son mujeres, el 48% estudian cursos de especialidad, el 87% son Católicas, el 50% son solteras y no tienen hijos 47%. El 58% del profesional de enfermería son contratados (CAS), el 30% trabaja en UCI cardiovascular, el 53% trabaja en el Hospital de 1 a 5 años, el 67% trabaja en UCI de 1 a 5 años, el 43% tiene dos pacientes a su cargo, el 87% trabaja en turnos rotativos, el 55% trabaja en otra Institución y el 48% trabajan en clínicas. Tienen una actitud ante la muerte del paciente de: indiferencia 57%, aceptación 23% y rechazo 20%. Además, tienen actitud de indiferencia ante la muerte en las siguientes dimensiones: evitación 67%, aceptación 65%, temor 57%, pasaje 77%, salida 42% y perspectiva profesional 72%. Conclusión: por lo tanto se concluye que los factores laborales de: condición laboral, tiempo que labora en el servicio y trabajo en otra Institución si estan relacionados significativamente con la actitud del profesional de enfermería ante la muerte del paciente terminal, mientras que los factores personales no existe relación.
114

End-of-life care, death and funerals of the Asante: An ethical and theological vision

Adu Addai, Emmanuel January 2016 (has links)
Thesis advisor: Melissa M. Kelley / Thesis advisor: Lisa Sowle Cahill / Thesis (STL) — Boston College, 2016. / Submitted to: Boston College. School of Theology and Ministry. / Discipline: Sacred Theology.
115

La corporalidad en el cuidado de enfermería a la persona hospitalizada con cáncer en fase terminal y su familiar acompañante, Chiclayo 2013

Gil Acedo, Katerin Isolina, Gil Acedo, Katerin Isolina January 2013 (has links)
La presente investigación cualitativa descriptiva tuvo como objetivos: Describir y comprender la corporalidad en el cuidado de enfermería a la persona hospitalizada con cáncer en fase terminal y su familiar acompañante, en el servicio de oncología del Hospital Nacional Almanzor Aguinaga Asenjo, 2012. La base teórica - conceptual se fundamentó en Waldow (2008) y Watson (2012), De Souza (1997); Ancízar (2006); Nieto (2004); y Quero (2007). La muestra fue no probabilística, determinada por saturación y redundancia siendo los informantes seis enfermeras que laboran en el servicio de Oncología, seis personas adultas con cáncer en fase terminal y seis familiares acompañantes de las personas hospitalizadas con cáncer en fase terminal. Para la recolección de los datos se utilizó la entrevista semiestructura. Se usó el análisis de contenido. Durante la investigación se tuvo en cuenta los criterios científicos y los principios de la bioética personalista. Se obtuvieron dos categorías: 1) El lenguaje corporal en el cuidado a la persona hospitalizada con cáncer en fase terminal y su familiar acompañante. 2) La complementariedad enfermera / familiar acompañante para el cuidado corporal a la persona hospitalizada con cáncer en fase terminal. La consideración final es que en el ejercicio de cuidar, es fundamental desarrollar la corporalidad, esta es importante para brindar un cuidado humanizado en enfermería, basando los cuidados en la dignidad, respeto, equidad, calidad y calidez humana; esto hace que el cuidado de enfermería sea humano y sensible, capaz de transmitir y recibir amor, comprendiendo que las personas son seres susceptibles a nuestros gestos, miradas y palabras, ese lenguaje verbal y no verbal que es capaz de transformar los estados de ánimo. / Tesis
116

Innovative practice in the process of patient management in palliative care

Davison, Graydon, University of Western Sydney, College of Law and Business, School of Management January 2005 (has links)
This thesis examines the management of multidisciplinary teams in a highly innovative environment through a study of multidisciplinary patient care teams in palliative care. It investigates management that enables spontaneous innovation where necessary, yet maintains discipline and compliance with legislation, regulation and policy. To assist the explanation a model of palliative care multidisciplinary team management and operation is developed, building on work described in the continuous innovation and organisational configuration literatures. This thesis describes innovative practices as focusing on changing the organisation’s social potential, when necessary, in order to match changes in an individual patient’s situation. A definition of innovation suitable to this environment is developed here, adapted from the innovation literature. A definition of social potential suitable to this environment is also developed, based primarily in the literature of the socialisation of organisations. In palliative care organisations, care is delivered to the patient and any group of people supporting the patient during the end of life process. Care provided to these supporters, referred to in this thesis as patient-based carers, can extend beyond the death of the patient. Palliative care is more than symptom management during the dying process and can involve an interaction lasting weeks or months between the organisation and patients and patient-based carers. A patient’s situation is described at many levels and involves a number of aspects of the patient’s condition and life; for example medical, social, psychosocial, spiritual and physical. In palliative care, patients and patient-based carers are the major sources of information about their situation and changes to it. This makes them active participants in the care team, although some patients and patient-based carers choose not to take this role. Every patient and every group of patient-based carers creates individualised situations when progressing through their end of life processes, requiring individualised care from teams that can change the membership mix to suit the situation. Palliative care professionals can be members of multiple individual patient care teams simultaneously and teams can include heads of discipline (managers). Multidisciplinary palliative care teams can be managed from inside or outside the team, as the situation requires. Uncertainty pervades this environment and the response is flexibility based in learning and understanding. From the model developed of the management of innovation in the palliative care environment implications for the management of multidisciplinary teams in a highly innovative environment are drawn. / Doctor of Philosophy (PhD)
117

Improving Time Efficiency of Feedforward Neural Network Learning

Batbayar, Batsukh, S3099885@student.rmit.edu.au January 2009 (has links)
Feedforward neural networks have been widely studied and used in many applications in science and engineering. The training of this type of networks is mainly undertaken using the well-known backpropagation based learning algorithms. One major problem with this type of algorithms is the slow training convergence speed, which hinders their applications. In order to improve the training convergence speed of this type of algorithms, many researchers have developed different improvements and enhancements. However, the slow convergence problem has not been fully addressed. This thesis makes several contributions by proposing new backpropagation learning algorithms based on the terminal attractor concept to improve the existing backpropagation learning algorithms such as the gradient descent and Levenberg-Marquardt algorithms. These new algorithms enable fast convergence both at a distance from and in a close range of the ideal weights. In particular, a new fast convergence mechanism is proposed which is based on the fast terminal attractor concept. Comprehensive simulation studies are undertaken to demonstrate the effectiveness of the proposed backpropagataion algorithms with terminal attractors. Finally, three practical application cases of time series forecasting, character recognition and image interpolation are chosen to show the practicality and usefulness of the proposed learning algorithms with comprehensive comparative studies with existing algorithms.
118

Layout och flöden på Pan Nordic Logistics framtida terminal

Bladh, Johan, Magnusson, Johan January 2007 (has links)
Pan Nordic Logistics (PNL) är ett logistikföretag som skickar gods inom huvudsakligen Norden men även övriga världen. PNL erbjuder olika logistiklösningar för företag och deras kunder. En av PNL:s godsterminaler är lokaliserad i Jönköping. Terminalen i Jönköping är inte anpassad efter dagens verksamhet. Godsmängden ökar ständigt och det råder platsbrist på terminalen. Dessa faktorer skapar ett behov av den framtida terminalen. Syftet med examensarbetet är att underlätta PNL:s expansion genom ett väl genomtänkt förslag på hur den framtida terminalen kan se ut. Tyngdpunkten i arbetet ligger på hur terminalen på bästa sätt utformas ur layout- och flödessynpunkt. Insamling av data har skett genom observationer, intervjuer och mätningar. För att vidare underbygga arbetet har litteraturstudier genomförts. Förslaget på den framtida terminalens utformning har utarbetats genom skalenliga skisser i CAD. För att arbeta fram ett förslag är det nödvändigt att samla in relevant data om befintlig terminal. Den befintliga terminalens layout och flöde styrs i hög grad av sorteringsbanan som ligger centralt i lokalen. Sorteringsbanan har en flaskhals som stoppar upp flödet. Sorteringsbanan är tillsammans med portarna och den tidigare nämnda platsbristen, terminalens största svagheter. Vid utformning av förslaget av den framtida terminalen har hänsyn tagits till de krav, behov och förutsättningar som PNL ställt upp. Förslaget på den framtida terminalen innehåller en mängd förbättringar jämfört med den befintliga. Sorteringsbanan har förändrats för att minimera befintlig flaskhals. Den framtida terminalen har ett betydligt större antal portar med en genomtänkt struktur. Större ytor i den framtida terminalen innebär möjligheter till bredare transportgångar och smidigare godshantering. Vidare har terminalens layout utformats så att huvudgodsflödena kan passera centralt genom terminalen. Resultatet av skalenliga mätningar visar att interntransportsträckor för huvudgodsflödet blir kortare i den framtida terminalen.
119

Paper de les Proteïnes P110, P140, MG312 i MG217 en l'Estructura i Funció de l'Organela Terminal de Mycoplasma genitalium

Burgos Castellanos, Raül 18 November 2009 (has links)
La tesis que es presenta comprèn tres treballs d'investigació independents, connectats entre sí per un mateix fil conductor: l'estudi de l'estructura i funció de l'organela terminal de Mycoplasma genitalium.En el primer treball s'han obtingut i caracteritzat mutants deficients per les proteïnes P140 i P110. Aquests estudis han revelat que les proteïnes P140 i P110 estan estabilitzades de forma recíproca, són els principals determinants de citadherència i la seva presència és necessària per al desenvolupament de l'organela terminal. A més, l'absència d'aquestes dues proteïnes també promou la inestabilitat de la proteïna de motilitat MG386 i un increment en els nivells de la proteïna DnaK. Per altra banda, també s'han analitzat un conjunt de mutants espontanis en adhesió cel·lular que apareixen amb una elevada freqüència. Aquest anàlisi ha permès determinar que aquests mutants s'originen com a conseqüència de grans delecions afectant als gens codificants de les proteïnes P140 i P110. A més, s'ha demostrat que aquestes delecions són producte de recombinacions entre seqüències dels gens afectats i seqüències repetides que es troben distribuïdes al llarg del genoma. Aquest origen recombinatiu explica l'alta freqüència d'aparició d'aquests mutants i obre la possibilitat de l'existència d'un mecanisme general de variació de fase de l'expressió de les proteïnes P140 i P110. En el segon treball s'ha investigat el paper de la proteïna MG312 en l'arquitectura i funció de l'organela terminal. Aquest estudi ha permès determinar que aquesta proteïna és un component estructural bàsic de l'organela terminal, essencial per al manteniment de la integritat d'aquesta estructura i d'alguns dels seus components. Com a conseqüència, els mutants deficients per la proteïna MG312 no desenvolupen organeles terminals, són parcialment deficients en adhesió i completament immòbils. D'altra banda, també s'ha analitzat la implicació de diferents dominis en la funció de la proteïna MG312. En general, aquest estudi ha permès identificar dos dominis funcionals importants: un domini C-terminal que manté la integritat estructural de l'organela terminal i un domini N-terminal amb una implicació més específica en motilitat i/o divisió cel·lular. També s'ha analitzat la implicació específica dels motius EAGR i Walker A presents en el domini N-terminal. Per últim, la proteïna MG312 ha estat expressada de forma recombinant. Estudis de microsocòpia electrònica sobre la proteïna recombinant indiquen que aquesta proteïna mostra una notable semblança estructural amb les proteïnes SMC, implicades en el manteniment estructural dels cromosomes. En el tercer i últim treball s'ha abordat la identificació de gens involucrats en el control del moviment dels micoplasmes. Es descriu el desenvolupament d'un mètode, que ens ha permès aïllar un mutant deficient per la proteïna MG217 i que exhibeix alteracions en els patrons de moviment. Les dades obtingudes de la caracterització d'aquest mutant indiquen que la proteïna MG217 és un nou component de l'organela terminal implicat en promoure la inclinació d'aquesta estructura respecte el cos cel·lular. De manera interessant, aquestes alteracions en el grau d'inclinació de l'organela terminal es correlacionen amb els canvis observats en els patrons de moviment, suggerint que l'organela terminal actua com a un timó i determina la direcció del desplaçament dels micoplasmes. / This thesis is composed of three independent research works focused on the study of the structure and function of the terminal organelle in Mycoplasma genitalium.In the first work, we obtained and characterized P140 and P110 deficient mutants. These studies revealed a reciprocal posttranslational stabilization between P140 and P110 proteins, and that these proteins are required for cell adhesion and terminal organelle development. Loss of either P140 or P110 also correlates with decreased levels of the MG386 motility related protein and increased levels of the DnaK protein. In addition, several cytadherence-negative mutants that appear spontaneously at unexpectedly high rates were also examined. We found that these mutants were originated as a consequence of large deletions affecting the P140 and P110 coding genes. Furthermore, we demonstrated that these deletions are the product of recombination events involving sequences of the P140 and P110 coding genes and DNA repetitive elements that are distributed along the M. genitalium genome. The recombinative origin of these deletions provides a plausible explanation for the unexpectedly high rates of appearance of these mutants and opens the possibility of the existence of a phase variation mechanism to switch on and off the expression of the M. genitalium P140 and P110 cytadhesins. In the second work, we investigated the role of the MG312 protein in the function and architecture of the terminal organelle. We found that MG312 protein is a structural component essential to maintain the integrity of the terminal organelle and its components. As a consequence, MG312 deficient mutants loss the terminal organelle and exhibit an intermediate-cytadherence phenotype and a complete absence of gliding motility. On the other hand, we also examined the contribution of different domains in the MG312 protein function. This study allowed us to identify two separate and functional domains: a C-terminal domain implicated in the terminal organelle assembly functions and an N-terminal domain involved specifically in gliding motility and/or cell division. The specific contribution of the EAGR box and Walker A box found in the N-terminal region was also examined. Finally, MG312 was expressed in a recombinant way and its structure was analyzed by using electron microscopy. Images obtained showed that this protein exhibits a surprising structural similarity with SMC proteins, involved in the structural maintenance of chromsomes.In the third and last work we aimed to identify genes related to the regulation of the mycoplasma cell movement. We developed a straightforward procedure that allowed us to isolate a MG217 deficient mutant exhibiting an altered gliding behaviour pattern. Further characterization of this mutant revealed that the MG217 protein is a novel terminal organelle component involved in the curving of this structure in M. genitalium cells. Interestingly, changes in the tilt angle between the terminal organelle and the cell body correlates with the observed changes in the gliding behaviour, suggesting that the terminal organelle operates as a guide to steer the mycoplasma cell in specific directions.
120

Food for Thought:Reimagining the Ontario Food Terminal

Ferro-Townsend, Sacha 25 May 2011 (has links)
Toronto is experiencing a food renaissance. Although there has been a resurgence in the popularity of local food and specialty products, neither supermarkets nor farmers’ markets have adequately responded to meet the demand. Contemporary retail infrastructure, comprised mainly of supermarket chains and independent farmers’ markets, is insufficient. In the supermarket reliable global imports are valued over regional products that support local farmers and the economy. Chain retailers prefer global players that produce consistent results in order to feed consumers who have become accustomed to seasonless food. On the other side of the spectrum, farmers’ markets do not generate the economy of scale required to keep the food industry afloat. As a convenience-driven consumer culture, the limited hours and seasonal variability associated with the farmers’ market typology inadequately fills the desire for locally sourced products. Simultaneously, wholesale distribution nodes have created a closed circuit of food delivery. In Toronto the main distribution point of wholesale produce stems from the Ontario Food Terminal, which feeds the city’s myriad grocery stores and restaurants. This ‘just in time’ food delivery system relies heavily on moving food in and out as quickly as possible. How can it be re-imagined as a dynamic space of interaction among a diverse group of vendors, purchasers and consumers? This thesis looks at the spatial impact of the food distribution network in Southern Ontario by re-imagining the Ontario Food Terminal as an organism of both local and global agricultural distribution. It attempts to respond to the growing desire of the public for locally sourced food products and fill a void that is currently missing: that of a reliable network to support local agricultural products. Local food can only survive by leveraging the global system. The reconciliation of two seemingly incompatible systems - local and global - will create a dynamic hybrid that captures the authenticity lacking in contemporary food culture.

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