Made available in DSpace on 2014-12-17T14:06:49Z (GMT). No. of bitstreams: 1 MauricioRP.pdf: 769557 bytes, checksum: 64ad674a4bbb41883e038d57b445215c (MD5) Previous issue date: 2008-11-10 / Lightweight concrete has been the subject of several studies towards the development of new building materials. Emphasis has been given on the particle size effect and nature of aggregates used as raw materials. The present study includes an analysis of the materials that make this kind of concrete, analyzes of mechanical properties such as compressive and tensile strength, in addition to assessments of the interface concrete aggregate/matrix interface, porosity and absorption profile of chloride ions in lightweight concrete based on expanded clay. The experiments were carried out by molding cylindrical samples 100 mm in diameter and 200 mm in height. The dosage experiments were performed without additives or with the addition of minerals: (T1) 1: 2.01: 1.10: 0.78 (T2) 1: 2.00: 1.32 : 0.62 - (T3) 1 :1.93 :1.54: 0.47 (cement : sand : expanded clay 0500 : expanded clay 1506).The water to cement ratio was set to 0.43. Expanded clay minerals with different average particle sizes were used, i.e., 9.5 mm/0500 and 19 mm/1506. The larger aggregate was coated by a glassy layer, yielding lower water absorption characteristics to the concrete. The results showed that the use of light expanded clay aggregates is a technically interesting solution to the production of lightweight concrete for construction applications / Considerando-se as tend?ncias de novos materiais na Constru??o Civil, o concreto leve tem sido objeto de v?rios trabalhos, com ?nfase na granulometria e suas mat?rias primas. Incluem-se neste estudo a altera??o de tra?os e dos materiais que comp?em esse concreto, analisando altera??es nas propriedades mec?nicas como resist?ncia ? compress?o e tra??o por compress?o diametral, al?m da interface agregado/matriz, porosidade e perfil de absor??o de ?ons cloreto no concreto leve ? base de argila expandida. Os experimentos foram realizados atrav?s de moldagem de corpos de prova cil?ndricos, com 100 mm de di?metro e 200 mm de altura. A dosagem experimental foi efetuada sem aditivos ou adi??es minerais, nos tra?os unit?rios em massa: (T1) 1 : 2,01 : 1,10 : 0,78 (T2) 1 : 2,00 : 1,32 : 0,62 - (T3) 1 : 1,93 : 1,54 : 0,47 (cimento : areia : argila expandida 0500 : argila expandida 1506); fixando-se a rela??o ?gua/cimento em 0,43. Para tanto, utilizou-se como agregado gra?do uma argila expandida, nas gradua??es 9,5 mm/0500 e 19 mm/1506. A argila de gradua??o maior era revestida com uma camada vitrificada, o que propiciou menor absor??o de ?gua pelo concreto. Os resultados mostraram que a utiliza??o da argila expandida como agregado leve ? uma solu??o tecnicamente vi?vel na produ??o de concreto leve para Constru??o Civil.

ble agreement did not exist due to the involved parties' irreconcilable positions. Two hypoth- eses addressing factors that are exogenous to the negotiations such as the parties' underlying negotiators' pursuits within the Six

The possibility of co-creation exists for all media, but game design has developed a culture that is unusually open to co-creation. This dissertation investigates significant cases of co-creation in mainstream games in order to explore how games can be co-created as alternative or critical media by their players. The core argument in the dissertation is that players co-create the design of a game only if certain conditions are met, namely: (1) player creation of a text or communication infrastructure that modifies the properties of the game and from which play emerges; (2) that this is done for a considerable group of players who share a particular practice of play; (3) that this is done not only by playing the game but by changing how others play it in a distinct creative activity, and (4), with the potential to subvert or contest the original design of the game. This situation where player creators have influence over the design of the game (but little power to enforce their interests) is problematic from the perspective of alternative or critical media, as alternative, local, production is seen as one reason for why a medium can have an alternative message. The industrial production of games as cultural commodities does limit the potential of co-creative game design for subversion because it reduces the level of participation in the creation process, thus keeping player creators relatively disempowered. Player creators do have influence on the design of the game, while at the same time having very little power to enforce their interests and design visions. The influence of player creators comes from the consumer power of millions of players who use co-created assets and who want to them to continue exiting, and this creates a mutually dependent relationship (and even partnership), between co-creators and commercial owners. The dissertation concludes that co-creative game design, despite limitations related to the industrial production of games as cultural commodities, is already happening, and shows a potential for turning games into alternative media.

Made available in DSpace on 2014-12-17T15:42:07Z (GMT). No. of bitstreams: 1 George Queiroz de Brito_DISSERT.PDF: 4768865 bytes, checksum: 4923b44db97f60fb6edf6bd685c61440 (MD5) Previous issue date: 2010-02-26 / This work examined the possibility of using mussel Mytella falcata as bioindicator sample to detect metal ions in several estuaries potiguares, since species substances that accumulate in their tissues due to its characteristics filter feeders have been used for environmental monitoring. The chemometrics by principal components analysis was used to reduce the size of the original data in order to establish a pattern of distribution of metal ion. Samples were collected at three different points in the estuaries Curimata?, Guara?ra-Papeba, Potengi, Galinhos-Guamar? and Piranhas-Assu having been marked with the location using GPS (Global Positioning System). The determination of humidity content and digestion of the samples were performed using methods described in the Compendium of analytical standards of the Institute Adofo Lutz (2005) and the determination of metal ions of the elements Al, Ba, Cd, Cr, Cu, Mn, Ni, Pb, Sn and Zn were performed by optical emission spectrometry with inductively coupled plasma as described by USEPA method 6010C. The results show that it is possible to use this molluscum Mytella falcata in the estuaries of Rio Grande do Norte for the determination of metal ions. The data were subjected to principal components analysis (PCA) which enabled us to verify the distribution pattern of the metal ions studied in several estuaries potiguares and group them according to the metal ions in common with and relate them to the activities in each region / Este trabalho procurou verificar a possibilidade do uso do molusco bivalve Mytella falcata como amostra bioindicadora para detectar ?ons met?licos em v?rios estu?rios potiguares, pois as esp?cies que acumulam subst?ncias em seus tecidos devido as suas caracter?sticas filtradoras tem sido utilizadas para o monitoramento ambiental. A quimiometria atrav?s da an?lise de componentes principais foi utilizada para reduzir a dimens?o dos dados originais com a finalidade de estabelecer um padr?o de distribui??o dos ?ons met?licos estudados. As amostras foram coletadas em tr?s pontos diferentes nos estu?rios Curimata?, Guara?ra-Papeba, Potengi, Galinhos-Guamar? e Piranhas-Assu tendo o local sido marcado com a utiliza??o de GPS (Global Positioning System). A determina??o do teor de umidade e a digest?o das amostras foram realizadas segundo metodologia descrita no comp?ndio de normas anal?ticas do Instituto Adofo Lutz (2005) e a determina??o dos ?ons met?licos dos elementos Al, Ba, Cd, Cr, Cu, Mn, Ni, Pb, Sn e Zn foram realizadas por espectrometria de emiss?o ?tica com plasma acoplado indutivamente como descrito pela metodologia USEPA 6010C. Os resultados obtidos mostram que ? poss?vel utilizar o molusco Mytella falcata presente nos estu?rios do Estado do Rio Grande do Norte para a determina??o de ?ons met?licos. Os dados foram submetidos ? an?lise de componentes principais (PCA) o que possibilitou verificarmos o padr?o de distribui??o dos ?ons met?licos estudados nos v?rios estu?rios potiguares e agrup?-los de acordo com os ?ons met?licos em comum e relacionar a presen?a com as atividades desenvolvidas em cada regi?o

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-10-14T20:45:55Z No. of bitstreams: 1 BrunoNunesMeloDaSilva_DISSERT.pdf: 3354700 bytes, checksum: 03b0257506443078469f4a0082749a27 (MD5) / Approved for entry into archive by Elisangela Moura (lilaalves@gmail.com) on 2015-10-14T21:47:15Z (GMT) No. of bitstreams: 1 BrunoNunesMeloDaSilva_DISSERT.pdf: 3354700 bytes, checksum: 03b0257506443078469f4a0082749a27 (MD5) / Made available in DSpace on 2015-10-14T21:47:15Z (GMT). No. of bitstreams: 1 BrunoNunesMeloDaSilva_DISSERT.pdf: 3354700 bytes, checksum: 03b0257506443078469f4a0082749a27 (MD5) Previous issue date: 2014-05-02 / O prop?sito de solu??es h?bridas, atrav?s da aplica??o da T?cnica da Transformada Integral Generalizada (GITT), permite o desenvolvimento para o tratamento do problema de escoamento com transfer?ncia de calor transiente para fluidos newtonianos condutores el?tricos submetidos a campos magn?ticos constantes em um canal de placas planas e paralelas com ou sem rota??o do canal, matematicamente esse problema ? modelado por sistemas de equa??es diferencias acopladas. No escoamento, as influ?ncias de efeitos Hall, deslizamento de ?ons e presen?a de part?culas s?lidas no escoamento s?o consideradas. O escoamento transiente ? mantido por gradiente de press?o constante ou exponencial, em regime permanente ? considerado o movimento da placa superior bem como a advec??o pelos poros da placa. O campo magn?tico ? aplicado na dire??o normal ao escoamento. Assume-se que tal campo magn?tico ? constante e n?o ? afetado pelo escoamento, de maneira que apenas a intera??o de uma via entre o escoamento do fluido condutor el?trico e o campo magn?tico ? estudada. Admite-se, no escoamento, a varia??o das propriedades f?sicas transportadas, tais como, viscosidade, condutividade t?rmica e el?trica com a temperatura. Resultados s?o obtidos e comparados com outros resultados num?ricos para os campos de velocidade e temperatura do fluido e das part?culas s?lidas em fun??o dos par?metros governantes, a saber, n?mero de Reynolds, Hartmann, hall, deslizamento de ?ons, concentra??o das part?culas s?lidas e par?metros f?sicos. Nas solu??es num?ricas, obtidas com o uso das bibliotecas do IMSL? e Fortran utiliza-se precis?o prescrita e trunca-se, a uma ordem finita, o sistema ordin?rio transformado o qual ? resolvido numericamente com uso das sub-rotinas bem estabelecidas no IMSL?. ? realizada an?lise de converg?ncia para os principais potenciais com o objetivo de ilustrar a consist?ncia da t?cnica (GITT) e a sua utiliza??o com finalidades de benchmark nessa ?rea da din?mica dos fluidos e transfer?ncia de calor. / The present study proposes the development of hybrid solutions to the transient Hartmann flow problem with heat transfer of an electrically conducting and newtonian fluid subjected to a constant magnetic field. The Generalized Integral Transform Technique is employed to analyze the influence of Hall and ion-slip effects, as well as the presence of solid particles on flow behavior, which is maintained by a constant or exponential-decaying gradient pressure. A transverse flow normal to the walls can also occurs, so that plates can be both porous. Additionally, a movement of the upper plate in the longitudinal direction can be considered. Here, it is assumed that the magnetic field is constant, being not affected by the flow, so that only an one-way interaction between the flow and the magnetic field is studied. Temperature-dependent transport properties, such as viscosity, thermal and electrical conductivity, can be considered too. Hybrid results are obtained and compared to other numerical results for the velocity and temperature fields of flow and solid particles as function of the main dimensionless governing parameters, namely, Reynolds number, Hartmann number, Hall, Ion-slip and concentration of solid particles. Convergence analyses are carried out for the main potentials in order to illustrate the consistency of the technique (GITT) and its use for purposes of benchmarking in the area of heat and fluid flow.

This study explores the adop)on of crypto assets and the onboarding of new users into Web 3.0 products through the lens of interac)on design. By employing par)cipatory design methodology during the design process, this work inves)gates the challenges faced by beginner or occasional users. By analyzing tradi)onal banking applica)ons like Revolut, Swish, and Slovak Tatra Banka, and comparing them with Binance exchange, the study proposes an approach to new technological applica)ons based on situa)onal normality theory. The final concept contributes to the discussion on the role interac)on design can play in the vola)le world of crypto assets and Web 3.0.

Thesis (MA (Afrikaans and Dutch))—University of Stellenbosch, 2009. / When reading Henning J. Pieterse’s work the reader is confronted by a sombre central theme, that of loss. Loss manifests itself in different ways in his oeuvre, but the most notable forms of loss are as result of the ending of a love affair or death. A second noticeable theme in Pieterse’s work is art and artistry, specifically the creative writing process. In my opinion these themes are most evident in his 1998 collection of short stories Omdat ons alles is (Because we are everything). The main premise in this collection of short stories is the suicide of the beloved wife and the accompanying feelings of loss and grief. The male characters in these stories struggle with processing and accepting loss - loss due the suicide of a beloved wife or due to the ending of a relationship. Various attempts are made to forget the loss and to numb the pain. The characters turn to alcohol, drugs and sex as ways of trying to work through or process the loss, but these methods only bring temporary relief. These self-destructive methods op escapism are contrasted with the constructive act of writing. At the same time the journey to psychic recovery and the processing of trauma becomes a creative journey. By expressing trauma through writing about wounding experiences there is striven to process it. The processing of trauma by means of literary narratives is often extremely exhausting and distressing. In the act of writing about trauma, painful memories that are repressed in the psyche are brought to the surface. In this thesis Omdat ons alles is is viewed from a therapeutic perspective to establish whether the act of writing plays a part in the processing of trauma. Narrative therapy is concerned with the finding of words and language to communicate trauma by creating a story in which the meaning and coherence that trauma destroys, can be recaptured. Trauma destroys the meaning and coherence of a life story and leaves the individual powerless and confused, but by finding words to communicate trauma, there is a positive movement in the direction of dealing with and accepting loss. In Omdat ons alles is Pieterse maps the journey of working through loss and trauma, but in these stories it is also emphasised that this journey is by no means a joyride. In the end it seems that the act of writing does play a part in the processing of trauma, but to which extent, remains an open question.

Die verhandeling ondersoek die wyse waarop Deon Opperman die versetmotief in sy Afrikanerdramas uitbeeld en vernuwe om die veranderende sosiale omgewing te weerspieël. Hoofstuk 1 verskaf ‘n oorsig oor verset as leefwyse en motief in die Afrikaanse drama. Hoofstuk 2 bied ‘n teoretiese ondersoek van The theatre of revolt (Brustein 1991), ’n bespreking van begrippe soos herskrywing, multikulturalisme, moderne diaspora en globalisasie sowel as ‘n kontekstuele studie van Deon Opperman se Afrikaanse oeuvre. Hoofstuk 3 (Donkerland) fokus op verset binne ‘n postkoloniale herskrywing van die Afrikanergeskiedenis. Hoofstuk 4 (Kruispad en Ons vir jou) sentreer rondom sosiale verset binne ‘n multikulturele omgewing, terwyl hoofstuk 5 Kaburu as weerkaatsende teks en die aktuele kwessie van die moderne diaspora as versetreaksie aanspreek. Die verhandeling kom tot die slotsom dat Opperman versetteater gebruik om kommentaar op aktuele probleme te lewer en om terselfdertyd‘n boodskap van transformasie oor te dra. / The dissertation examines how Deon Opperman portrays and regenerates the revolt motif in his Afrikaner dramas, in order to reflect the changing social environment. Chapter 1 provides an overview of revolt as lifestyle and as motif in Afrikaans drama. Chapter 2 offers a theoretical examination of The theatre of revolt (Brustein 1991), a discussion of concepts such as rewriting, multiculturalism, modern diaspora and globalization, as well as a contextual study of Deon Opperman’s Afrikaans oeuvre. Chapter 3 (Donkerland) focuses on revolt within the postcolonial rewriting of Afrikaner history. Chapter 4 (Kruispad and Ons vir jou) deals with social revolt within a multicultural milieu, whereas chapter 5 discusses Kaburu as a reflecting text and addresses the issue of the modern diaspora as a reaction to political transition. The dissertation reaches the conclusion that Opperman is using South African theatre as a platform for revolt as well as for transformation. / Afrikaans & theory of Literature / MA (Afrikaans en Algemene Literatuurwetenskap)

Die verhandeling ondersoek die wyse waarop Deon Opperman die versetmotief in sy Afrikanerdramas uitbeeld en vernuwe om die veranderende sosiale omgewing te weerspieël. Hoofstuk 1 verskaf ‘n oorsig oor verset as leefwyse en motief in die Afrikaanse drama. Hoofstuk 2 bied ‘n teoretiese ondersoek van The theatre of revolt (Brustein 1991), ’n bespreking van begrippe soos herskrywing, multikulturalisme, moderne diaspora en globalisasie sowel as ‘n kontekstuele studie van Deon Opperman se Afrikaanse oeuvre. Hoofstuk 3 (Donkerland) fokus op verset binne ‘n postkoloniale herskrywing van die Afrikanergeskiedenis. Hoofstuk 4 (Kruispad en Ons vir jou) sentreer rondom sosiale verset binne ‘n multikulturele omgewing, terwyl hoofstuk 5 Kaburu as weerkaatsende teks en die aktuele kwessie van die moderne diaspora as versetreaksie aanspreek. Die verhandeling kom tot die slotsom dat Opperman versetteater gebruik om kommentaar op aktuele probleme te lewer en om terselfdertyd‘n boodskap van transformasie oor te dra. / The dissertation examines how Deon Opperman portrays and regenerates the revolt motif in his Afrikaner dramas, in order to reflect the changing social environment. Chapter 1 provides an overview of revolt as lifestyle and as motif in Afrikaans drama. Chapter 2 offers a theoretical examination of The theatre of revolt (Brustein 1991), a discussion of concepts such as rewriting, multiculturalism, modern diaspora and globalization, as well as a contextual study of Deon Opperman’s Afrikaans oeuvre. Chapter 3 (Donkerland) focuses on revolt within the postcolonial rewriting of Afrikaner history. Chapter 4 (Kruispad and Ons vir jou) deals with social revolt within a multicultural milieu, whereas chapter 5 discusses Kaburu as a reflecting text and addresses the issue of the modern diaspora as a reaction to political transition. The dissertation reaches the conclusion that Opperman is using South African theatre as a platform for revolt as well as for transformation. / Afrikaans and theory of Literature / M. A. (Afrikaans en Algemene Literatuurwetenskap)