There have been a number of methods proposed for increasing the precision of mobile positioning systems. One of the latest methods is Assisted GPS, A-GPS, on the Secure User Plane for Location, SUPL, platform, which seems to be a very interesting alternative from TeliaSoneras perspective, thanks to minimal infrastructural investment costs. According to theory and lab testing A-GPS has the potential of providing a very good customer value in relation to the investment needed. There is, however, a great need to see the performance when used in real user environments and with real user equipment. This is the basis for the choice of field testing as the method used in this thesis. The result from the field tests conducted in this thesis shows that the performance of A-GPS is very good in outdoor environments, but when used in indoor environments, poor signal strength in combination with multipath and fading becomes a problem with low accuracy and long response times as a result. Using a hosted mapping service, in combination with A-GPS, provides the possibilities of launching location based services even outside the home network. TeliaSonera had already found such a hosted mapping service that matched their compatibility, and reliability, requirements. This thesis investigates this hosted mapping service further and finds that the quality of the cartographic presentation of the map information is very poor. The conclusion is that A-GPS performance, today, is limited by the hardware and algorithms used. If these are further adapted to indoor conditions, A-GPS has the potential of providing the customer value promised by the theoretical performance. For a successful launch of A-GPS services there is a great need of better cartographic presentation of map information, than what is currently is provided by the investigated hosted mapping service.

<p>There have been a number of methods proposed for increasing the precision of mobile positioning systems. One of the latest methods is Assisted GPS, A-GPS, on the Secure User Plane for Location, SUPL, platform, which seems to be a very interesting alternative from TeliaSoneras perspective, thanks to minimal infrastructural investment costs.</p><p>According to theory and lab testing A-GPS has the potential of providing a very good customer value in relation to the investment needed.</p><p>There is, however, a great need to see the performance when used in real user environments and with real user equipment. This is the basis for the choice of field testing as the method used in this thesis.</p><p>The result from the field tests conducted in this thesis shows that the performance of A-GPS is very good in outdoor environments, but when used in indoor environments, poor signal strength in combination with multipath and fading becomes a problem with low accuracy and long response times as a result.</p><p>Using a hosted mapping service, in combination with A-GPS, provides the possibilities of launching location based services even outside the home network. TeliaSonera had already found such a hosted mapping service that matched their compatibility, and reliability, requirements. This thesis investigates this hosted mapping service further and finds that the quality of the cartographic presentation of the map information is very poor.</p><p>The conclusion is that A-GPS performance, today, is limited by the hardware and algorithms used. If these are further adapted to indoor conditions, A-GPS has the potential of providing the customer value promised by the theoretical performance. For a successful launch of A-GPS services there is a great need of better cartographic presentation of map information, than what is currently is provided by the investigated hosted mapping service.</p>

Made available in DSpace on 2014-12-17T15:37:17Z (GMT). No. of bitstreams: 1 AlenuskaNRQS_DISSERT.pdf: 781275 bytes, checksum: d75de5ab7f88cdf7e4e64acfc12884c5 (MD5) Previous issue date: 2012-12-14 / This paper is a case study that aims to discuss the effects of drug abuse by a person with psychotic structure from a psychoanalytical perspective. The interest in this subject was born from an internship experience in the Mental Health area in which a psychotic patient had a drug abuse problem and the service treating him had difficulties dealing with this. In order to accomplish the objective of this work four theoretical chapters were written and the case is discussed throughout them articulating the theoretical issues with clinical practice. A literature review revealed that Freud and Lacan did not dedicate themselves to the study of the effect of drug use by psychotic patients but they made important contributions unfolding the theoretical and clinical psychoanalytical practice. Contemporary psychoanalytic authors suggest that the drug use made by psychotics differs from the use by neurotics, because of the particularity of the psychotic structure. It was found that drug use in psychosis can operate in three different ways: the first refers to drug use as substitute of a missing signifier helping the psychotic patient building a social bond. The second function is to intensify psychotic phenomena and the third function is to operate as an attempt to diminish those same phenomena. We conclude that, while the use of drugs in neurosis provides an individualist way of satisfaction, that excludes social aspects. For psychosis such use may operate differently and may play a role in social integration, among others effects. Such discussion can help move forward the direction of treatment of psychosis when the case involves drug use / O presente trabalho tem o objetivo de discutir, a partir de um caso cl?nico e ? luz da psican?lise, quais os diferentes modos de opera??o do uso de drogas sobre a estrutura psic?tica e quais seriam os efeitos e as particularidades dessa articula??o. O interesse pelo tema nasceu a partir de uma experi?ncia de est?gio na ?rea de Sa?de Mental, na qual havia um paciente psic?tico que fazia uso de drogas, assim como existia uma dificuldade do servi?o em como e onde tratar esse usu?rio. Para atingirmos nosso objetivo, constru?mos quatro cap?tulos te?ricos nos quais o caso cl?nico ? retomado algumas vezes em articula??o com as discuss?es levantadas, a fim de aproximarmos a pesquisa te?rica com a pr?tica cl?nica, o que caracteriza o m?todo deste trabalho como te?rico-cl?nico. A revis?o de literatura revelou que Freud e Lacan n?o se dedicaram ao estudo dessa tem?tica, mas deram contribui??es importantes que se desdobram atualmente no campo te?rico e na pr?tica cl?nica. Autores psicanal?ticos contempor?neos apontam que o uso feito por psic?ticos ? diferente do uso feito por neur?ticos, pois o psic?tico possui particularidades que s?o de estrutura. Constatou-se que o uso de drogas na psicose pode operar de tr?s modos distintos: o primeiro refere-se ao uso de droga enquanto supl?ncia ? aus?ncia do significante que insere o psic?tico no la?o social; O segundo tem a fun??o de intensifica??o dos fen?menos psic?ticos e o terceiro opera como tentativa de apaziguamento desses mesmos fen?menos. Conclui-se que, enquanto o uso de drogas na neurose pode oferecer um modo de satisfa??o individualista que prescinde do social, na psicose esse uso pode operar de maneira diversa, podendo ter uma fun??o de desencadeamento, de estabiliza??o, de inser??o social, dentre outras. Tal discuss?o permite avan?armos na dire??o do tratamento da psicose, quando o caso inclui o uso de drogas, bem como na dire??o do tratamento das toxicomanias