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Associação entre a fração do complemento C4d, anticorpos anti-hla doador específicos e infiltrados de células B em enxertos renais com rejeiçãoCarpio, Virna Nowotny January 2012 (has links)
Introdução: O fragmento C4d e os anticorpos anti-HLA doador específicos (DSA) são marcadores de resposta humoral em enxertos renais com rejeição, mas o papel das células B nesse processo ainda não é claro. Neste estudo foi avaliada a correlação entre C4d, DSA e células B de enxertos com disfunção e sua associação com aspectos morfológicos, função e sobrevida do rim transplantado. Material e Métodos: A marcação para C4d, células B CD20+ e plasmócitos CD138+ foi realizada por imunoperoxidase em biópsias por indicação de 110 receptores de transplante renal. Positividade para CD20 e CD138 foi definida por curva ROC (≥5 céls./mm2). O soro coletado concomitante a biópsia foi testado para DSA classe I e classe II. Estes marcadores foram correlacionados com dados clínicos e do transplante, a histopatologia de Banff e a evolução do rim transplantado. Resultados: Depósitos de C4d e DSA circulantes foram detectados em 100% e 70% dos pacientes com rejeição mediada por anticorpos (RMA) respectivamente, e nos casos de rejeição aguda celular (RAC) em 42% (p<0,001, vs. RMA) e 28% (p=0,003, vs. RMA). Estes dois marcadores correlacionaram-se positivamente (r=0,31, p=0,016). Houve correlação significativa entre DSA e plasmócitos CD138+ (r=0.32 p=0,006), mas as células CD20 e CD138 não se correlacionaram entre si. As células CD138+ predominaram na RMA, associadas com maior painel pré-transplante e DSA, mas não a C4d, e as células CD20+ predominaram na RAC e nas biópsias com fibrose intersticial/atrofia tubular, associadas a maior incompatibilidade HLA e a retransplantes. Pacientes com C4d+ tiveram pior função e sobrevida do enxerto em três anos de transplante, e aqueles com DSA+ uma pior 7 sobrevida do enxerto. Positividade para CD20 ou CD138 não foi preditiva da função ou sobrevida do enxerto. Na análise multivariada, somente o C4d foi fator de risco para perda do enxerto. Conclusões: Esses resultados confirmam o valor prognóstico do C4d e dos DSA para uma pior evolução do enxerto renal, e sugerem uma associação das células B CD20+ com parâmetros de rejeição celular e dos plasmócitos CD138+ com marcadores de resposta humoral. Entretanto, nesse estudo o infiltrado de células B na biópsia do enxerto não foi preditivo de uma pior evolução do rim transplantado. / Introduction: The fragment C4d and the donor specific anti-HLA antibodies (DSA) are markers of the humoral response in rejecting kidney grafts, but the role of B cells in this process is still unclear. In this study we evaluated the correlation between C4d, DSA and B cells in dysfunctional grafts, and their association with morphological features, and graft function and survival. Material and Methods: The staining for C4d, CD20+ B cells and CD138+ plasmocytes were done by immunoperoxidase in 110 kidney graft biopsies for cause. Positivity for CD20 and CD138 were established by ROC curve (≥5 cells/mm2). Serum collected at biopsy were tested for anti-HLA class I and II antibodies. These markers were correlated with clinical and transplant characteristics, Banff histopathology and graft outcomes. Results: C4d deposits and circulating DSA were detected in 100% and 70% of the patients with antibody-mediated rejection (AMR) respectively, and in cases with acute cellular rejection (ACR) in 42% (p<0.001, vs. AMR) and 28% (p=0.003, vs. AMR), respectively. Both markers were positively correlated (r=0.31, p=0.016), and there was also a significant correlation between DSA and plasmocytes CD138+ (r=0.32 p=0.006). CD20 and C138 cells were not siginificantly correlated. Plasmocytes CD138+ predominated in AMR, and were associated with higher pre transplant PRA and DSA positivity, but not with C4d. CD20+ B cells were highly expressed in ACR and in biopsies with interstitial fibrosis and tubular atrophy, in association with more HLA mismatches and re-transplants. Patients with C4d had poorer graft function and survival, and those 9 with DSA + also had a worse graft survival in three years of transplant. CD20 or CD138 cells were not predictive of graft outcomes. In multivariated analysis, only C4d remained a risk factor for graft loss. Conclusion: These results confirm the prognostic value of C4d and circulating DSA for a worse kidney graft outcome, and suggest an association of CD20+ B cells with parameters of cellular rejection whereas CD138+ plasmocytes correlated with markers of the humoral response. However, in this study the B cell infiltrate in graft biopsy was not predictive of adverse outcomes to the transplanted kidney.
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Citizen participation within UK pension fund responsible investment decisionsSleight, Richard January 2018 (has links)
Pensions funds represent the collective savings of millions of people and the decisions and actions they take can be greatly beneficial or detrimental to the global economy, society, and the lives of people around the world. The aim of this project is to investigate the possibilities of citizen participation in relation to responsible investment in UK occupational pension funds, and what the barriers and opportunities are for citizens, in this context pension holders, to participate in financial decisions made on their behalf. The research questions focus on the arguments for and against such participation, in general and in relation to using an online voting platform. Qualitative interviews with Responsible Investment Advocates are used to scope ideas around participation, and the study is grounded in a social constructionist theory of meaning. This project sits at the intersection of two fields: Responsible Investment and Participatory Communication for Social Change. The main findings of this project are that RI Advocates disagree over the necessity for such citizen participation, as a process for change and as a goal. The perceived benefits of citizen participation ranged from empowerment, accountability, power redistribution and structural change. Barriers to participation exist based upon the current investment system, with the main barrier perceived as a lack of demand from the investment industry, wider civil society, and significantly citizens. It was stated in interviews that citizen participation is a relatively ignored area within Responsible Investment, and therefore much can be learned from existing C4D research and practice.
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SpeakUP! Young Women Share Powerful Stories From Their Own LivesWarren, Jenn January 2016 (has links)
How can a Digital Storytelling workshop help educate, inspire and mobilise young women engaged in a non-profit organisation, in order to assist their peers? This exploratory study investigates whether Digital Storytelling can foster digital literacy, self-awareness and reflection amongst workshop participants, and how young women may be able to support each other and their peers through the act of creating and sharing personal digital stories. Conducted using qualitative and participatory methods, with the theoretical underpinnings of Albert Bandura’s Social Learning Theory and Social Cognitive Theory, Paulo Freire’s conscientisation and participatory development, this research is conducted in collaboration with female mentors from the sport-based adolescent health organisation, Grassroot Soccer. First, I analyse the women’s interactions and learnings during the Digital Storytelling workshop, where participants create digital stories in a hands-on setting (using the Story Center model). This is done through participant observation and semi-structured interviews with participants following the workshop. Second, I seek to understand how or if young women can re-present themselves in the context of a facilitated Digital Storytelling workshop and challenge gender stereotypes through their own digital stories. This data is collected through a pre-workshop questionnaire, participant observation, semi-structured interviews, and analysis of the digital stories. While this is an exploratory study, I anticipate results in the following areas: (1) cross-pollination of knowledge between workshop participants and facilitators; (2) self-awareness, self-confidence and reflection amongst young women; (3) increase in digital literacy, storytelling and audio/visual skills; and (4) increase in understanding of, or introduction to, digital media and communication, activism and social change.
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Collaborative Innovation: A shared discourse within Phnom Penh’s co-working community?Pearce-Neudorf, Justin January 2014 (has links)
This paper explores the existence of a shared community involving the members, users and organisers of three collaborative work spaces located in Phnom Penh, Cambodia. Situated as part of an emergent global phenomenon, these spaces, despite having notable differences, share many important features and are, I argue, part of a knowledge exchanging cluster of grassroots entrepreneurialism and innovation-oriented organisations, groups and events in the Phnom Penh area. I explore this cluster as a community in two ways: firstly through the mapping of a knowledge architecture locating the spaces and their actors as nodes within a flow of relationships and activities, secondly, via a networked ethnographic inquiry tracing these flows to actors within the network through qualitative research methods. In doing so I reveal the degree to which there exists a shared community perceived by the users and organisers of these spaces as well highlighting potential opportunities for greater sharing of knowledge, ideas and experience. The paper finds that though a nascent community does exist, there is still significant variance in the levels of cognisance of this community by the different actors as well as in the approach to its engagement. Despite this, there remains, in large part, a shared set of goals and values paving the way for future community collaboration.
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Can the Subaltern Tweet? A Netnography of India’s Subaltern Voices Entering the Public via Social MediaKujat, Christopher Norman January 2016 (has links)
This netnography depicts the notions of India’s subaltern voices entering the public via social media. The study puts an emphasis on feminists and caste critics, divided into two case studies. The study witnessed dynamics of Twitter use between sociality and activism as well as the notions of performance and identity of these two intersecting, yet polarised groups.Privilege remains a governing factor, which regulates access, accessibility and the use of the subaltern sphere and makes it exclusive for a privileged group of the subaltern. The main benefits of Twitter in the subaltern sphere, as the study suggests, is the factor of sociality and networking around causes, which leads to peer dialogue in the public sphere and increases visibility. This eventually leads to more attention for certain causes in the public discourse and to the countering of mainstream media narratives, for example in the case study of the Dalit Lives Matter Movement and its ad hoc fame, which evolved after the suicide of the Dalit PhD scholar Rohith Vemula.Further, while online activism is present, its impact remains hard to measure. The main benefits of the space are the plurality of voices that inhabit it. Also, the unleashing of the counternarratives towards the mainstream media that are even more controlled by the state than the new media landscape, is an important benefit.
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Setting Up Shop in the Digital Bazaar – Bangladeshi Blue-Collar Service-Providers’ Adoption of a Business AggregatorShahid, Shantana January 2020 (has links)
This essay explores the early experiences of Bangladeshi blue-collar service workers in digitalising their livelihoods. It is a qualitative study that surveys and interviews service-providers in Dhaka who use the business aggregator platform Sheba.xyz, an online service marketplace, and seeks to understand what brought these self-employed micro-entrepreneurs, previously outside the digital economy, to adopt an ICT-enabled solution. The study is guided by Diffusion of Innovations (DOI) theory, one of the historically dominant paradigms in the field of communication for development (C4D). The overarching research question is, “Why did blue-collar service-providers in Dhaka adopt and use a digital business aggregator platform?” The aim is to explore what motivated/discouraged and enabled/hindered innovation adoption among a group of users previously marginalised from digital and financial inclusion. The findings suggest that adoption of Sheba.xyz among service-providers was not driven so much by a desire to digitalise one’s business per se, and as a means of mitigating a previous inability to do so. Rather, the factors that emerge from the qualitative data are other perceived relative advantages of the solution – of increase in customers, income, and opportunity. Survey respondents and interviewees also displayed strong affiliation with, and trust in, the platform provider; an alertness for fair treatment; and a drive to prosper, suggesting that they embraced a comprehensive concept and altered life situation where belonging, respect, and self-fulfilment matters, rather than narrowly adopted a new mobile application.
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A Communication Analysis for UNICEF Lebanon - A media landscape of Lebanon, media consumption habits of Syrian refugees and potential C4D interventions to promote social inclusion and child/youth protection for Syrian children and youths in LebanonYap, Yee-Yin, Leffler, Abigail January 2017 (has links)
The objective of this study is to put forward informed C4D recommendations to help organizations like UNICEF combat the situation for Syrian refugee children and youths in Lebanon, who through displacement and resettling into the complex Lebanese socio-political landscape may be at risk of becoming a lost generation. This paper focuses on the prevention and elimination of actions such as bullying, sexual harassment, gender-based violence, and early marriage.Conceptual framework: the communication theoretical framework considers Bourdieu’s habitus model as well as the uses and gratification model. Concepts conducive to social cohesion include citizenship, communitas and cosmopolitanism.Methodology: data were gathered through a variety of primary and secondary sources. The former includes semi-structured interviews with subject matter experts and analysis of UNICEF’s external communication practices. The latter comprises the collection, assessment, comparison and summarizing of various reports about Lebanese media.Findings: Lebanon has a pluralistic media landscape, though it appears fragmented, reflecting its socio-political sectarian situation. The media in Lebanon is criticized for lack of public service. The arts scene seems to fill a void in terms of examining the collective memory in respect of not only the civil war (1975-1990) but also of social issues arising as a result of globalization and modernity. Syrians in Lebanon consume Lebanese media as much as media from their own country. Interpersonal communication channels appear to be the preferred mode of communication among both the host and the refugee communities, although among the youth social media platforms such as WhatsApp and Facebook are commonplace. Among the traditional media channels, television appears to be popular. The representation of Syrian refugees in Lebanese media is varied, with about one fourth of the published material portraying Syrians as a security issue.Results: a series of C4D recommendations that use sports and the arts as an overarching theme.
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Structuring Legitimacy via Strategies of Leadership, Cooperation and Identity: The Comité de Motard Kisima's Engagement of Media and Communication for the Enactment of Motorcycle Taxi Work in LubumbashiMatthias, Nakia M. 17 September 2015 (has links)
No description available.
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