Carbon matrix composite (CMC) electrode and surface conducting (SC) electrode have been developed to study the copper-activation and the subsequent xanthate adsorption on insulating sphalerite. Fabricating CMC electrode involves embedding sphalerite particles in carbon to form a carbon matrix composite; and SC electrode is designed by contacting a platinum wire to the sphalerite surface. When these electrodes are activated by heavy metal ions such as copper, a conducting layer is formed on the mineral surfaces that allows dynamic electrochemical studies to be conducted. Voltammetric studies on the copper activated CMC:ZnS electrodes in inert electrolytes show that although the activation product and kinetics may differ with pH, copper-activation occurs at all pH ranges. At acidic pH, a Cu2S-like activation product was formed at open circuit. When activation was conducted at near neutral and alkaline pH at open circuit, the surface products formed were identified to be CuS-like. It was also established that the amount of copper uptaken by sphalerite is strongly dependent on the time of activation and on the electrochemical potential applied during activation. Activation at potentials positive of the rest potential decreases the amount of copper on the surface. Indeed, activation at potentials of 50 to 100 mV more positive of the rest potential in the activating solution completely inhibits copper activation. This result is consistent with the anodic stripping voltammetry that shows copper can be removed from the surface of sphalerite at oxidizing potentials. Activation at potentials mildly negative of the rest potential causes a progressive increase in the amount of copper on the surface, consistent with the diffusion controlled reduction process between ZnS and Cu2+ ions observed in the activating solution. At very low potentials, however, elemental copper is formed, which may worsen the selectivity of the sphalerite flotation. Controlled potential contact angle measurements showed that xanthate adsorption does occur on copper-activated sphalerite at all pH ranges. However, the contact angles and flotation recovery decrease at near neutral pH. This problem is caused by the adsorption of the copper-hydroxy species on the activated sphalerite surface. It was found that addition of small amount of complexing reagent can improve the flotation recovery at the near neutral pH. The results obtained in the present work show that potential control of the activation process can provide a means of controlling copper uptake and, hence, the selectivity and recovery of sphalerite flotation. The development of CMC:ZnS and SC:ZnS electrodes provides a practical and reliable way to quantitatively estimate the amount of copper uptake on sphalerite surface after activation. / Ph. D.

This diploma thesis deals with proposal for reconstruction of the section of the D46 motorway and the adjacent motorway junction designated as Exit 2 Vyškov. The area in question is located in the non-built-up area of the town of Vyškov. The D46 motorway crosses first-class road number II/430 at this point, which connects with the II/430 road at the intersection. The intersection we are concerned with is plagued by several problems. The first is the unsatisfactory connection of road number II/430 in the eastern part of the intersection, where the indirect branch has no slip road, meaning that vehicles are forced to stop here, resulting in clogging of the exit from Vyškov to Olomouc. Another problem is the turn-off to the petrol station in the western part of the intersection. The problem occurs at the location of the turn-off to the previously mentioned petrol station, where approximately 100 m from the turn-off there is an indirect branch of the western part of the intersection and vehicles wishing to join the D46 motorway are forced to slow down there.

A subsonic wind tunnel facility was built and tested as part of a base line test investigating flow within a diffuser-collector. Facility controls allowed the quarter scale model to match both Reynolds number and Mach number. Mass averaged conditions at the diffuser inlet during testing were determined as 1.939 ? 106 for Reynolds number based upon diffuser inlet hydraulic diameter, and 0.418 for Mach number. A flow conditioning section prior to test section contained several interchangeable sections. Flow conditioning components were used to create flow characteristic of that leaving the last stage of a land-based gas turbine. The diffuser-collector subsystem was evaluated through the use of wall static pressure measurements, a variety of probe traverse measurements, and Stereo-PIV. Flow within the collector and diffuser were determined to be heavily dependent upon the collector geometry. PIV measurements showed the development of two large counter rotating vortices within the collector. Each symmetric vortex grew and shifted according to the collector geometry while creating complex regions of flow. Pressure recovery within the diffuser was in range of 0.47 to 0.78, and would drop to 0.52 at the collector exit. The drop in pressure recovery was presumed to be a combination of inefficient diffusion in the collector and losses due to the vortices. The baseline test was found to be successful in terms of facility design, and determining the critical flow phenomena. Further testing and experimentation are necessary to evaluate specific details of the collector geometry's effect upon the pressure recovery and flow development. / Master of Science

This essay analyses the two main characters in John Fowles’s novel The Collector and the three characters Miranda, Ferdinand and Caliban in William Shakespeare’s play The Tempest, as well as the intertextual connection between them. The essay is based off the idea of intertextuality, which refers to a connection between texts. To study this connection, a comparative method is used. The character analysis is grounded upon Shlomith Rimmon- Kenan’s model for characterization. The essay concludes that the main characteristics of the characters in The Tempest are mirrored in the corresponding characters in The Collector. Miranda is kindhearted, empathic, brave, naïve, romanticizing, innocent and superior. Ferdinand and Caliban are both present in Clegg’s character, in which the former side is naïve, romanticizing, civilized, in control of his sexual urge and honorable; while the latter side is inhuman, a villain, violent, uncivilized, not in control of his sexual urge, incapable of change and does not show any remorse. The comparison of the two works also sheds light on the slave-motif that is present in The Collector, both in the inner struggle between Clegg’s two alter egon, as well as in his relationship with Miranda. / Denna uppsats analyserar de två huvudkaraktärerna i John Fowles roman The Collector och de tre karaktärerna Miranda, Ferdinand och Caliban i William Shakespeares pjäs The Tempest samt den intertextuella kopplingen dem emellan. Uppsatsen utgår från begreppet intertextualitet som indikerar ett samband mellan texter. För att undersöka detta samband används en komparativ metod. I botten för karaktärsanalysen ligger Shlomith Rimmon- Kenans modell för karakterisering. Uppsatsen visar att huvuddragen hos karaktärerna i The Tempest speglas i karaktärernas motparter i The Collector. Miranda är godhjärtad, empatisk, modig, naiv, romantiserande, oskuldsfull och överlägsen. Ferdinand och Caliban kommer båda till uttryck i Cleggs karaktär, där den förra sidan är naiv, romantiserande, civiliserad, i kontroll över sin sexuella drift och hederlig; medan den senare sidan är omänsklig, en skurk, våldsam, ociviliserad, inte kan kontrollera sin sexuella drift, oförmögen att förändras och inte visar någon ånger. Jämförelsen mellan verken bidrar även till att belysa det slavmotiv som förekommer i The Collector och tar uttryck dels i den inre kamp som pågår mellan Cleggs två alteregon samt i hans relation med Miranda.

As the development of hardware progresses, computers are expected to solve increasingly complex problems. However, solving more complex problems requires more complex software. To be able to develop these software systems, new programming languages with new features and higher abstraction levels are introduced. These features are designed to ease development, but sometimes they also make the runtime behavior unpredictable. Such features can not be used in real-time systems. A feature that traditionally has been unpredictable is garbage collection. Moreover, even though a garbage collector frees unused memory, almost all such methods require large amounts of additional memory. Garbage collection relieves developers of the responsibility to reclaim memory that is no longer used by the application. This is very tedious and error prone if done manually. Since garbage collection increases productivity and decreases programming errors, developers find it attractive, also in the real-time domain. This thesis presents a predictable garbage collection method, real-time reference counting, that increases memory efficiency by about 50 % compared to the most memory efficient previously presented predictable garbage collector. To increase performance, an optimization technique called object ownership that eliminates redundant reference count updates is presented. Object ownership is designed for reference counters, but can also be used to increase the performance of other incremental garbage collectors. Finally, a static garbage collector is presented. The static garbage collector can allocate objects statically or on the runtime stack, and insert explicit instructions to reclaim memory allocated on the heap. It makes it possible to eliminate the need for runtime garbage collection for a large class of Java applications. The static garbage collection method can also be used to remove costly synchronization instructions. Competing static garbage collection methods with reasonable analysis time are restricted to stack allocation, and thus handle a smaller class of applications.

This thesis deals with the designing of a garbage collector for the PNtalk virtual machine. It describes and rates the approaches and algorithms for an automatic memory management. Four algorithm families ale presented: mark-sweep, mark-compact, copying algorithms and reference counting. At first it describes sequential forms, that pauses running of the main program (mutator), then it describes parallel and concurent forms, that do not pauses the mutator. The thesis also presents generational model of garbage collecting. The following sections briefly introduces object orientated Petri nets. The result of this thesis is the design of the generational garbage collector for the PNtalk virtual machine.

<p>Rapporten handlar om ett examensarbete omfattande 20 p som är utfört för Thermia AB i Arvika. Uppdragsgivaren ville få fram förslag på möjliga åtgärder som kan minska ljudnivån från en luftvärmeväxlare. För bra helhetsbild av projektet, läs även kapitel: 6.</p><p>Värmeväxlaren ingår som en komponent i ett värmepumpssystem, Thermia Aer 5, som använder uteluften som värmekälla. Huvudmålet med projektet blev alltså att undersöka och utvärdera ljudbildningen från värmeväxlaren samt att komma fram till olika förslag på möjliga åtgärder som har potential att sänka ljudnivån. Värmeväxlarens förmåga att uppta energi fick ej heller försämras.</p><p>I projektets slutskede tillverkades det också en enkel prototyp på ett av designförslagen där den störande ljudnivån blev lägre. Läs mer om detta längre ner.</p><p>Ett delmål som vi själva formulerade, var också att undersöka olika möjligheter att öka värmepumpssystemets totala kapacitet för energiupptagning genom att kombinera systemet med någon form av solfångare. Kombinationen solfångare och luftvärmeväxlare innebär också en lägre ljudnivå eftersom fläkten i värmeväxlaren mer sällan behöver gå på full effekt. I viss mån har även estetiska aspekter på formgivningen beaktats.</p><p>Nedan presenteras fyra olika förslag på idéer för att öka luftvärmeväxlarens prestanda:</p><p>Av det första förslaget tillverkades en prototyp där luftvärmeväxlarens utblås är riktat uppåt, istället för som nu åt sidan, vilket minskar risken att omgivningen nås av högfrekvent ljud. Högfrekvent ljud sprids nämligen inte så mycket i sidled.</p><p>Batteridelen på värmeväxlaren har fått en större area, vilket möjliggör ett minskat volymflöde av luft, utan att den tappar i effekt, jämfört med nuvarande värmeväxlare.</p><p>Dessa två åtgärder reducerar det avgivna ljudet med ca10 dB.</p><p>En större batteriarea är även positivt ur energisynpunkt då värmefaktorn (COP) ökar på grund av ett minskat antal nödvändiga avfrostningar.</p><p>Förslag nummer två inbegriper en solfångarlösning som, tack vare avsaknaden av direktförångning, även går att direktkoppla till köldbäraren (brinen) eller direkt mot värmepumpens ackumulatortank.</p><p>Solfångaren täcker hela effektbehovet på sommaren och ger ett tillskott resten av året.</p><p>Det tredje förslaget är en s.k. väggplacerad luftsolfångare som förvärmer insugsluften till värmeväxlaren. Den uppenbara fördelen med detta alternativ är den synnerligen enkla konstruktionen vilket gör att kostnaden kan hållas nere, se bild 4.4.4-2.</p><p>Det fjärde förslaget, är att låta hela husets tak fungera som en solfångare som bilderna 6-1 visar. Inströmmande luft till värmeväxlaren förvärms av de soluppvärmda takpannorna som kan vara av tegel, betong eller ännu hellre av glas. Dessutom tillvaratas förlustvärme från hustak och ventilation. Detta förslag ger ett mycket gott energiutbyte.</p><p>Ytterligare ett intressant sätt att sänka ljudbildningen är att driva fram luften genom värmeväxlaren, helt eller delvis, med hjälp av en hög elektrisk spänning, se kapitel: 6.6.</p> / <p>This report is a candidate degree and the assignment is done in the interest of Thermia AB in Arvika, Sweden. The company wanted proposals of preventive measures aiming to reduce sound emission from a heat exchanger. For a good general impression of the project, see chapter 6. The heat exchanger forms a part of a component in a heat pump system, called Thermia Aer 5, which uses air from outside as a heat source.</p><p>The main target of the project was to examine and evaluate sound emission from the heat exchanger and to get different proposals on possible preventive measures in order to lower sound emission. It was not allowed to reduce the heat exchangers ability to collect energy.</p><p>In the end of the project a simple prototype was built which took advantage of some of the design proposals. The sound emission from the prototype was reduced.</p><p>Another target, formulated by ourselves, was to examine different possibilities to increase the capacity of the heat pump system by combining it with solar collectors. The heat pump system combined with solar collectors also produces reduced sound emission.</p><p>Even some aesthetic aspects have been taken into consideration.</p><p>Below, four different proposals of ideas are introduced that can increase the performance of the heat exchanger:</p><p>The first solution was to direct the air exhaust upwards instead of the tangential exhaust on the present heat exchanger. This makes it more improbable that a high frequency sound wave should reach the surrounding area. Sound with high frequency doesn’t spread so much in a sideways direction. An increase of the battery area makes it possible to lower the air volume flow, because of the increased potential for energy output. These two measures reduced the sound level with a proximal amount of about 10 dB. In addition, an increased exchange battery area increases the heat factor (COP) due to the frost distribution on the battery.</p><p>Solution number two include a solar panel that, due to the lack of direct vaporization in the heat pump system, is possible to serial connect direct on the brine or indirectly to the water accumulation tank. The solar panel gives hot water in the summer and an additional energy output the rest of the year.</p><p>The third solution is a wall mounted air solar panel which gives the air a higher input temperature to the air heat exchanger. This is a very simple and cost effective solution.</p><p>The fourth solution is to let the whole roof of the house act as a solar collector as the pictures 6-1 describes. The sun heats the roofing tile which, in turn, heats streaming air that reaches the heat exchanger. The tile can been made of tiling, concrete - or preferably - transparent glass. Furthermore heat loss from the roof and ventilation is prevented.</p><p>Another interesting solution that reduces sound emission is to force air through the exchanger with a high electric voltage field. Further information chapter: 6.6.</p>

Rapporten handlar om ett examensarbete omfattande 20 p som är utfört för Thermia AB i Arvika. Uppdragsgivaren ville få fram förslag på möjliga åtgärder som kan minska ljudnivån från en luftvärmeväxlare. För bra helhetsbild av projektet, läs även kapitel: 6. Värmeväxlaren ingår som en komponent i ett värmepumpssystem, Thermia Aer 5, som använder uteluften som värmekälla. Huvudmålet med projektet blev alltså att undersöka och utvärdera ljudbildningen från värmeväxlaren samt att komma fram till olika förslag på möjliga åtgärder som har potential att sänka ljudnivån. Värmeväxlarens förmåga att uppta energi fick ej heller försämras. I projektets slutskede tillverkades det också en enkel prototyp på ett av designförslagen där den störande ljudnivån blev lägre. Läs mer om detta längre ner. Ett delmål som vi själva formulerade, var också att undersöka olika möjligheter att öka värmepumpssystemets totala kapacitet för energiupptagning genom att kombinera systemet med någon form av solfångare. Kombinationen solfångare och luftvärmeväxlare innebär också en lägre ljudnivå eftersom fläkten i värmeväxlaren mer sällan behöver gå på full effekt. I viss mån har även estetiska aspekter på formgivningen beaktats. Nedan presenteras fyra olika förslag på idéer för att öka luftvärmeväxlarens prestanda: Av det första förslaget tillverkades en prototyp där luftvärmeväxlarens utblås är riktat uppåt, istället för som nu åt sidan, vilket minskar risken att omgivningen nås av högfrekvent ljud. Högfrekvent ljud sprids nämligen inte så mycket i sidled. Batteridelen på värmeväxlaren har fått en större area, vilket möjliggör ett minskat volymflöde av luft, utan att den tappar i effekt, jämfört med nuvarande värmeväxlare. Dessa två åtgärder reducerar det avgivna ljudet med ca10 dB. En större batteriarea är även positivt ur energisynpunkt då värmefaktorn (COP) ökar på grund av ett minskat antal nödvändiga avfrostningar. Förslag nummer två inbegriper en solfångarlösning som, tack vare avsaknaden av direktförångning, även går att direktkoppla till köldbäraren (brinen) eller direkt mot värmepumpens ackumulatortank. Solfångaren täcker hela effektbehovet på sommaren och ger ett tillskott resten av året. Det tredje förslaget är en s.k. väggplacerad luftsolfångare som förvärmer insugsluften till värmeväxlaren. Den uppenbara fördelen med detta alternativ är den synnerligen enkla konstruktionen vilket gör att kostnaden kan hållas nere, se bild 4.4.4-2. Det fjärde förslaget, är att låta hela husets tak fungera som en solfångare som bilderna 6-1 visar. Inströmmande luft till värmeväxlaren förvärms av de soluppvärmda takpannorna som kan vara av tegel, betong eller ännu hellre av glas. Dessutom tillvaratas förlustvärme från hustak och ventilation. Detta förslag ger ett mycket gott energiutbyte. Ytterligare ett intressant sätt att sänka ljudbildningen är att driva fram luften genom värmeväxlaren, helt eller delvis, med hjälp av en hög elektrisk spänning, se kapitel: 6.6. / This report is a candidate degree and the assignment is done in the interest of Thermia AB in Arvika, Sweden. The company wanted proposals of preventive measures aiming to reduce sound emission from a heat exchanger. For a good general impression of the project, see chapter 6. The heat exchanger forms a part of a component in a heat pump system, called Thermia Aer 5, which uses air from outside as a heat source. The main target of the project was to examine and evaluate sound emission from the heat exchanger and to get different proposals on possible preventive measures in order to lower sound emission. It was not allowed to reduce the heat exchangers ability to collect energy. In the end of the project a simple prototype was built which took advantage of some of the design proposals. The sound emission from the prototype was reduced. Another target, formulated by ourselves, was to examine different possibilities to increase the capacity of the heat pump system by combining it with solar collectors. The heat pump system combined with solar collectors also produces reduced sound emission. Even some aesthetic aspects have been taken into consideration. Below, four different proposals of ideas are introduced that can increase the performance of the heat exchanger: The first solution was to direct the air exhaust upwards instead of the tangential exhaust on the present heat exchanger. This makes it more improbable that a high frequency sound wave should reach the surrounding area. Sound with high frequency doesn’t spread so much in a sideways direction. An increase of the battery area makes it possible to lower the air volume flow, because of the increased potential for energy output. These two measures reduced the sound level with a proximal amount of about 10 dB. In addition, an increased exchange battery area increases the heat factor (COP) due to the frost distribution on the battery. Solution number two include a solar panel that, due to the lack of direct vaporization in the heat pump system, is possible to serial connect direct on the brine or indirectly to the water accumulation tank. The solar panel gives hot water in the summer and an additional energy output the rest of the year. The third solution is a wall mounted air solar panel which gives the air a higher input temperature to the air heat exchanger. This is a very simple and cost effective solution. The fourth solution is to let the whole roof of the house act as a solar collector as the pictures 6-1 describes. The sun heats the roofing tile which, in turn, heats streaming air that reaches the heat exchanger. The tile can been made of tiling, concrete - or preferably - transparent glass. Furthermore heat loss from the roof and ventilation is prevented. Another interesting solution that reduces sound emission is to force air through the exchanger with a high electric voltage field. Further information chapter: 6.6.

O presente estudo tem por objetivo fornecer uma maior compreensão acerca do que motiva o comportamento de compra de coleção, utilizando como objeto de estudo, os colecionadores de discos de vinil da cidade de Porto Alegre. A questão central de pesquisa pode ser definida como: quais as causas motivadoras do consumo de discos vinil? A importância do estudo se justifica devido ao fato da existência de lacunas nos estudos sobre comportamento de consumo de coleção e sobre a tendência nostálgica influenciando o consumo. Acima de tudo, um colecionador é um consumidor, é baseado nessa premissa que se desenvolve este estudo. Tal escolha se deve ao fato de que esse tipo de produto é um produto de especialidade, que se difere de um produto comum por uma série de características (HOYER E MACINNIS, 1997) e também ao “significado pessoal” (SCHIFFMAN E KANUK, 2000) que o consumidor muitas vezes atribui a esse tipo de produto, tornando-o um objeto de estudo mais pertinente e rico em informações. O tipo de coleção escolhida permite que também se aborde o tema do comportamento de compra com tendência nostálgica. Acredita-se que o resultado alcançado com esta pesquisa seja pertinente por ter utilizado ao longo de seu desenvolvimento heavy-users e comerciantes peritos de um bem de especialidade como objetos de estudos, além de ter utilizado uma pesquisa multimetodológica, que permite que o conjunto de resultados alcançados seja mais compreensivo (ELALI, 1997). As diferentes etapas realizadas: observação simples, realização de entrevistas em profundidade filmadas, incluindo a utilização da técnica do incidente crítico e por fim, análise dos resultados, montagem e finalização da vídeo-etnografia permitem que se façam inferências sobre a amostra estudada. Os resultados alcançados indicam que alguns dos colecionadores parecem verdadeiramente estar deslocados no tempo e fora da realidade em que estão inseridos. Não vivem a correria do mundo moderno, mas sim aproveitam para se dedicar aos seus discos favoritos. A maioria dos colecionadores analisados possui um sentimento de nostalgia para com seus discos, mas, acima de tudo, o sentimento de envolvimento que se cria ao longo dos anos entre o colecionador e a coleção é algo indissolúvel. Em qualquer momento da vida, a coleção funciona como um porto-seguro para o colecionador, que talvez não possa ser representado por nenhum outro objeto ou até mesmo pessoa. Enfim, são pessoas que amam seus objetos demasiadamente, e tendo-os como uma extensão de sua personalidade. / The present study aims at gathering a higher comprehension about the motivation of collector behavior, using as study subjects the vinyl record collectors of Porto Alegre. The central question of this research can be defined as: What are the causes that motivate vinyl record consumption? The study importance is justified due to the fact that there are gaps to be filled in the studies of collector behavior as well as in nostalgic tendencies influencing consumption. Above all, a collector is a consumer, is based on this premise this study was developed. Such choice is due to the fact that this product is a specialty product, which differs itself from a common product by a series of characteristics (HOYER E MACINNIS, 1997) and also due to the “personal meaning” (SCHIFFMAN E KANUK, 2000) that the consumer attributes to this kind of product, creating an object of study more pertinent and richer in information. The kind of collection chosen allows also the approach of studies on nostalgic consumer behavior. It is believed that the results of this research are pertinent due to the subjects interviewed: heavy-users and expert dealers, besides the use of a multimethodological approach, which allows that the joint results gathered to be more comprehensive (ELALI, 1997). The different stages accomplished: simple observation, recorded in-depth interviews, including the usage of critical incident technique, editing and finishing of the videography allows to develop inferences on the sample analyzed. The results indicate that some collectors really seem to be out of the time and the reality which surrounds them. They do not live the daily rush of the modern world, instead, they enjoy their spare time to dedicate to their favorite records. Most collectors posses a nostalgic feeling to their records, but, above all, the felling of involvement created with the passage of the years between the collectors and the collection is something unsolvable. In any moment of their lives the collection can be seen as a safe harbor, which perhaps cannot be found in any other object or even in a person. Moreover, they are persons whom love this objects with fervor and that found in them an extension of their personality.

O presente estudo tem por objetivo fornecer uma maior compreensão acerca do que motiva o comportamento de compra de coleção, utilizando como objeto de estudo, os colecionadores de discos de vinil da cidade de Porto Alegre. A questão central de pesquisa pode ser definida como: quais as causas motivadoras do consumo de discos vinil? A importância do estudo se justifica devido ao fato da existência de lacunas nos estudos sobre comportamento de consumo de coleção e sobre a tendência nostálgica influenciando o consumo. Acima de tudo, um colecionador é um consumidor, é baseado nessa premissa que se desenvolve este estudo. Tal escolha se deve ao fato de que esse tipo de produto é um produto de especialidade, que se difere de um produto comum por uma série de características (HOYER E MACINNIS, 1997) e também ao “significado pessoal” (SCHIFFMAN E KANUK, 2000) que o consumidor muitas vezes atribui a esse tipo de produto, tornando-o um objeto de estudo mais pertinente e rico em informações. O tipo de coleção escolhida permite que também se aborde o tema do comportamento de compra com tendência nostálgica. Acredita-se que o resultado alcançado com esta pesquisa seja pertinente por ter utilizado ao longo de seu desenvolvimento heavy-users e comerciantes peritos de um bem de especialidade como objetos de estudos, além de ter utilizado uma pesquisa multimetodológica, que permite que o conjunto de resultados alcançados seja mais compreensivo (ELALI, 1997). As diferentes etapas realizadas: observação simples, realização de entrevistas em profundidade filmadas, incluindo a utilização da técnica do incidente crítico e por fim, análise dos resultados, montagem e finalização da vídeo-etnografia permitem que se façam inferências sobre a amostra estudada. Os resultados alcançados indicam que alguns dos colecionadores parecem verdadeiramente estar deslocados no tempo e fora da realidade em que estão inseridos. Não vivem a correria do mundo moderno, mas sim aproveitam para se dedicar aos seus discos favoritos. A maioria dos colecionadores analisados possui um sentimento de nostalgia para com seus discos, mas, acima de tudo, o sentimento de envolvimento que se cria ao longo dos anos entre o colecionador e a coleção é algo indissolúvel. Em qualquer momento da vida, a coleção funciona como um porto-seguro para o colecionador, que talvez não possa ser representado por nenhum outro objeto ou até mesmo pessoa. Enfim, são pessoas que amam seus objetos demasiadamente, e tendo-os como uma extensão de sua personalidade. / The present study aims at gathering a higher comprehension about the motivation of collector behavior, using as study subjects the vinyl record collectors of Porto Alegre. The central question of this research can be defined as: What are the causes that motivate vinyl record consumption? The study importance is justified due to the fact that there are gaps to be filled in the studies of collector behavior as well as in nostalgic tendencies influencing consumption. Above all, a collector is a consumer, is based on this premise this study was developed. Such choice is due to the fact that this product is a specialty product, which differs itself from a common product by a series of characteristics (HOYER E MACINNIS, 1997) and also due to the “personal meaning” (SCHIFFMAN E KANUK, 2000) that the consumer attributes to this kind of product, creating an object of study more pertinent and richer in information. The kind of collection chosen allows also the approach of studies on nostalgic consumer behavior. It is believed that the results of this research are pertinent due to the subjects interviewed: heavy-users and expert dealers, besides the use of a multimethodological approach, which allows that the joint results gathered to be more comprehensive (ELALI, 1997). The different stages accomplished: simple observation, recorded in-depth interviews, including the usage of critical incident technique, editing and finishing of the videography allows to develop inferences on the sample analyzed. The results indicate that some collectors really seem to be out of the time and the reality which surrounds them. They do not live the daily rush of the modern world, instead, they enjoy their spare time to dedicate to their favorite records. Most collectors posses a nostalgic feeling to their records, but, above all, the felling of involvement created with the passage of the years between the collectors and the collection is something unsolvable. In any moment of their lives the collection can be seen as a safe harbor, which perhaps cannot be found in any other object or even in a person. Moreover, they are persons whom love this objects with fervor and that found in them an extension of their personality.