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Mobile Camera Array Calibration for Light Field Acquisition

Xu, Yichao; Maeno, Kazuki; Nagahara, Hajime; Taniguchi, Rin-ichiro
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 16/07/2014
Relevância na Pesquisa
16.62%
The light field camera is useful for computer graphics and vision applications. Calibration is an essential step for these applications. After calibration, we can rectify the captured image by using the calibrated camera parameters. However, the large camera array calibration method, which assumes that all cameras are on the same plane, ignores the orientation and intrinsic parameters. The multi-camera calibration technique usually assumes that the working volume and viewpoints are fixed. In this paper, we describe a calibration algorithm suitable for a mobile camera array based light field acquisition system. The algorithm performs in Zhang's style by moving a checkerboard, and computes the initial parameters in closed form. Global optimization is then applied to refine all the parameters simultaneously. Our implementation is rather flexible in that users can assign the number of viewpoints and refinement of intrinsic parameters is optional. Experiments on both simulated data and real data acquired by a commercial product show that our method yields good results. Digital refocusing application shows the calibrated light field can well focus to the target object we desired.; Comment: 11th International Conference on Quality Control by Artificial Vision (QCAV2013)

Navigation domain representation for interactive multiview imaging

Maugey, Thomas; Daribo, Ismael; Cheung, Gene; Frossard, Pascal
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
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Enabling users to interactively navigate through different viewpoints of a static scene is a new interesting functionality in 3D streaming systems. While it opens exciting perspectives towards rich multimedia applications, it requires the design of novel representations and coding techniques in order to solve the new challenges imposed by interactive navigation. Interactivity clearly brings new design constraints: the encoder is unaware of the exact decoding process, while the decoder has to reconstruct information from incomplete subsets of data since the server can generally not transmit images for all possible viewpoints due to resource constrains. In this paper, we propose a novel multiview data representation that permits to satisfy bandwidth and storage constraints in an interactive multiview streaming system. In particular, we partition the multiview navigation domain into segments, each of which is described by a reference image and some auxiliary information. The auxiliary information enables the client to recreate any viewpoint in the navigation segment via view synthesis. The decoder is then able to navigate freely in the segment without further data request to the server; it requests additional data only when it moves to a different segment. We discuss the benefits of this novel representation in interactive navigation systems and further propose a method to optimize the partitioning of the navigation domain into independent segments...

Deep Learning Multi-View Representation for Face Recognition

Zhu, Zhenyao; Luo, Ping; Wang, Xiaogang; Tang, Xiaoou
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 26/06/2014
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Various factors, such as identities, views (poses), and illuminations, are coupled in face images. Disentangling the identity and view representations is a major challenge in face recognition. Existing face recognition systems either use handcrafted features or learn features discriminatively to improve recognition accuracy. This is different from the behavior of human brain. Intriguingly, even without accessing 3D data, human not only can recognize face identity, but can also imagine face images of a person under different viewpoints given a single 2D image, making face perception in the brain robust to view changes. In this sense, human brain has learned and encoded 3D face models from 2D images. To take into account this instinct, this paper proposes a novel deep neural net, named multi-view perceptron (MVP), which can untangle the identity and view features, and infer a full spectrum of multi-view images in the meanwhile, given a single 2D face image. The identity features of MVP achieve superior performance on the MultiPIE dataset. MVP is also capable to interpolate and predict images under viewpoints that are unobserved in the training data.

In-Network View Synthesis for Interactive Multiview Video Systems

Toni, Laura; Cheung, Gene; Frossard, Pascal
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 01/09/2015
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To enable Interactive multiview video systems with a minimum view-switching delay, multiple camera views are sent to the users, which are used as reference images to synthesize additional virtual views via depth-image-based rendering. In practice, bandwidth constraints may however restrict the number of reference views sent to clients per time unit, which may in turn limit the quality of the synthesized viewpoints. We argue that the reference view selection should ideally be performed close to the users, and we study the problem of in-network reference view synthesis such that the navigation quality is maximized at the clients. We consider a distributed cloud network architecture where data stored in a main cloud is delivered to end users with the help of cloudlets, i.e., resource-rich proxies close to the users. In order to satisfy last-hop bandwidth constraints from the cloudlet to the users, a cloudlet re-samples viewpoints of the 3D scene into a discrete set of views (combination of received camera views and virtual views synthesized) to be used as reference for the synthesis of additional virtual views at the client. This in-network synthesis leads to better viewpoint sampling given a bandwidth constraint compared to simple selection of camera views...

Chaotic motion of three-body problem : an origin of macroscopic randomness of the universe

Liao, Shijun
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 07/04/2013
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The famous three-body problem is investigated by means of a numerical approach with negligible numerical noises in a long enough time interval, namely the Clean Numerical Simulation (CNS). From physical viewpoints, position of any bodies contains inherent micro-level uncertainty. The evaluations of such kind of inherent micro-level uncertainty are accurately simulated by means of the CNS. Our reliable, very accurate CNS results indicate that the inherent micro-level uncertainty of position of a star/planet might transfer into macroscopic randomness. Thus, the inherent micro-level uncertainty of a body might be an origin of macroscopic randomness of the universe. In addition, from physical viewpoints, orbits of some three-body systems at large time are inherently random, and thus it has no physical meanings to talk about the accurate long-term prediction of the chaotic orbits. Note that such kind of uncertainty and randomness has nothing to do with the ability of human being. All of these might enrich our knowledge and deepen our understandings about not only the three-body problem but also chaos.; Comment: 19 pages, 17 figures

Ordering stakeholder viewpoint concerns for holistic and incremental Enterprise Architecture: the W6H framework

Sultan, Mujahid; Miranskyy, Andriy
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 24/09/2015
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Context: Enterprise Architecture (EA) is a discipline which has evolved to structure the business and its alignment with the IT systems. One of the popular enterprise architecture frameworks is Zachman framework (ZF). This framework focuses on describing the enterprise from six viewpoint perspectives of the stakeholders. These six perspectives are based on English language interrogatives 'what', 'where', 'who', 'when', 'why', and 'how' (thus the term W5H Journalists and police investigators use the W5H to describe an event. However, EA is not an event, creation and evolution of EA challenging. Moreover, the ordering of viewpoints is not defined in the existing EA frameworks, making data capturing process difficult. Our goals are to 1) assess if W5H is sufficient to describe modern EA and 2) explore the ordering and precedence among the viewpoint concerns. Method: we achieve our goals by bringing tools from the Linguistics, focusing on a full set of English Language interrogatives to describe viewpoint concerns and the inter-relationships and dependencies among these. Application of these tools is validated using pedagogical EA examples. Results: 1) We show that addition of the seventh interrogative 'which' to the W5H set (we denote this extended set as W6H) yields extra and necessary information enabling creation of holistic EA. 2) We discover that particular ordering of the interrogatives...

Single-view to Multi-view: Reconstructing Unseen Views with a Convolutional Network

Tatarchenko, Maxim; Dosovitskiy, Alexey; Brox, Thomas
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 20/11/2015
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We present a convolutional network capable of generating images of a previously unseen object from arbitrary viewpoints given a single image of this object. The input to the network is a single image and the desired new viewpoint; the output is a view of the object from this desired viewpoint. The network is trained on renderings of synthetic 3D models. It learns an implicit 3D representation of the object class, which allows it to transfer shape knowledge from training instances to a new object instance. Beside the color image, the network can also generate the depth map of an object from arbitrary viewpoints. This allows us to predict 3D point clouds from a single image, which can be fused into a surface mesh. We experimented with cars and chairs. Even though the network is trained on artificial data, it generalizes well to objects in natural images without any modifications.

The Concept of Appropriation as a Heuristic for Conceptualising the Relationship between Technology, People and Organisations

Baillette, Pamela; Kimble, Chris
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 17/04/2008
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The stated aim of this conference is to debate the continuing evolution of IS in businesses and other organisations. This paper seeks to contribute to this debate by exploring the concept of appropriation from a number of different epistemological, cultural and linguistic viewpoints to allow us to explore 'the black box' of appropriation and to gain a fuller understanding of the term. At the conceptual level, it will examine some of the different ways in which people have attempted to explain the relationship between the objective and concrete features of technology and the subjective and shifting nature of the people and organisation within which that technology is deployed. At the cultural and linguistic level the paper will examine the notion as it is found in the Francophone literature, where the term has a long and rich history, and the Anglophone literature where appropriation is seen as a rather more specialist term. The paper will conclude with some observations on the ongoing nature of the debate, the value of reading beyond the literature with which one is familiar and the rewards that come from exploring different historical (and linguistic) viewpoints.; Comment: in Proceedings of 13th UKAIS Conference, (April 2008), Bournemouth...

What is the Nature of EUV Waves? First STEREO 3D Observations and Comparison with Theoretical Models

Patsourakos, S.; Vourlidas, A.; Wang, Y. -M.; Stenborg, G.; Thernisien, A.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 13/05/2009
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One of the major discoveries of the Extreme ultraviolet Imaging Telescope (EIT) on SOHO were intensity enhancements propagating over a large fraction of the solar surface. The physical origin(s) of the so-called `EIT' waves is still strongly debated. They are considered to be either wave (primarily fast-mode MHD waves) or non-wave (pseudo-wave) interpretations. The difficulty in understanding the nature of EUV waves lies with the limitations of the EIT observations which have been used almost exclusively for their study. Their limitations are largely overcome by the SECCHI/EUVI observations on-board the STEREO mission. The EUVI telescopes provide high cadence, simultaneous multi-temperature coverage, and two well-separated viewpoints. We present here the first detailed analysis of an EUV wave observed by the EUVI disk imagers on December 07, 2007 when the STEREO spacecraft separation was $\approx 45^\circ$. Both a small flare and a CME were associated with the wave cadence, and single temperature and viewpoint coverage. These limitations are largely overcome by the SECCHI/EUVI observations on-board the STEREO mission. The EUVI telescopes provide high cadence, simultaneous multi-temperature coverage, and two well-separated viewpoints. Our findings give significant support for a fast-mode interpretation of EUV waves and indicate that they are probably triggered by the rapid expansion of the loops associated with the CME.; Comment: Solar Physics...

Predicting Online Protest Participation of Social Media Users

Ranganath, Suhas; Morstatter, Fred; Hu, Xia; Tang, Jiliang; Liu, Huan
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 09/12/2015
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Social media has emerged to be a popular platform for people to express their viewpoints on political protests like the Arab Spring. Millions of people use social media to communicate and mobilize their viewpoints on protests. Hence, it is a valuable tool for organizing social movements. However, the mechanisms by which protest affects the population is not known, making it difficult to estimate the number of protestors. In this paper, we are inspired by sociological theories of protest participation and propose a framework to predict from the user's past status messages and interactions whether the next post of the user will be a declaration of protest. Drawing concepts from these theories, we model the interplay between the user's status messages and messages interacting with him over time and predict whether the next post of the user will be a declaration of protest. We evaluate the framework using data from the social media platform Twitter on protests during the recent Nigerian elections and demonstrate that it can effectively predict whether the next post of a user is a declaration of protest.

On the power spectrum generated during inflation

Bastero-Gil, Mar; Berera, Arjun; Mahajan, Namit; Rangarajan, Raghavan
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
16.62%
Recently there have been differing viewpoints on how to evaluate the curvature power spectrum generated during inflation. Since the primordial curvature power spectrum is the seed for structure formation and provides a link between observations and inflationary parameters, it is important to resolve any disagreements over the expression for the power spectrum. In this article we discuss these differing viewpoints and indicate issues that are relevant to both approaches. We then argue why the standard expression is valid.; Comment: 4 pages; Minor changes; Matches the published version

Monocular depth cues in computer vision applications

Cheda, Diego
Fonte: [Barcelona] : Universitat Autònoma de Barcelona, Publicador: [Barcelona] : Universitat Autònoma de Barcelona,
Tipo: Tesis i dissertacions electròniques; info:eu-repo/semantics/doctoralThesis Formato: application/pdf
Publicado em //2013 ENG; ENG
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La percepción de la profundidad es un aspecto clave en la visión humana. El ser humano realiza esta tarea sin esfuerzo alguno con el objetivo de efectuar diversas actividades cotidianas. A menudo, la percepción de la profundidad se ha asociado con la visión binocular. Pese a esto, los seres humanos tienen una capacidad asombrosa de percibir las relaciones de profundidad, incluso a partir de una sola imagen, mediante el uso de varias pistas monoculares. En el campo de la visión por ordenador, si la información de la profundidad de una imagen estuviera disponible, muchas tareas podŕıan ser planteadas desde una perspectiva diferente en aras de un mayor rendimiento y robustez. Sin embargo, dada una única imagen, esta posibilidad es generalmente descartada, ya que la obtención de la información de profundidad es frecuentemente obtenida por las técnicas de reconstrucción tridimensional, que requieren dos o más imágenes de la misma escena tomadas desde diferentes puntos de vista. Recientemente, algunas propuestas han demostrado que es posible obtener información de profundidad a partir de imágenes individuales. En esencia, la idea es aprovechar el conocimiento a priori de las condiciones de adquisición de la imagen y de la escena observada para estimar la profundidad empleando pistas pictóricas monoculares. Estos enfoques tratan de estimar con precisión los mapas de profundidad de la escena empleando técnicas computacionalmente costosas. Sin embargo...

Sumak Kawsay, or the concept of living well, and perceptions about natural, urban and rural areas : the case of Cuenca (Ecuador)

Malo Larrea, Antonio
Fonte: Universidade Autônoma de Barcelona Publicador: Universidade Autônoma de Barcelona
Tipo: Trabalho em Andamento Formato: application/pdf
Publicado em //2012 ENG
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This research explores critical environmental concepts from the standpoint of political ecology. It contrasts the Ecuadorian Kichua indigenous concept of Sumak Kawsay (i.e., living well), with discourses about natural, urban and rural areas. Sumak Kawsay was included in Ecuador’s 2008 constitution as an alternative to the neoclassical idea of development. This work reveals interesting insights from a variety of social and political viewpoints from both rural and urban areas. The research is based on the medium sized city of Cuenca, which is located in the southern Ecuadorian Andes. We used an adaptation of the Q Method to investigate stakeholders’ perceptions. Four remarkably well-defined viewpoints were revealed. Although these views contrast strongly with Sumak Kawsay, it is possible to transform this paradigm in the foundation of Cuenca’s public policies and institutional structure.

Reconstruction of the Pose of Uncalibrated Cameras via User-Generated Videos

Bennett, Stuart; Lasenby, Joan; Kokaram, Anil; Inguva, Sasi; Birkbeck, Neil
Fonte: Universidade de Cambridge Publicador: Universidade de Cambridge
Tipo: Conferência ou Objeto de Conferência
EN
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This is the author accepted manuscript. The final version is available from IEEE via http://dx.doi.org/10.1145/2659021.2659028; Extraction of 3D geometry from hand-held unsteady uncalibrated cameras faces multiple difficulties: finding usable frames, feature-matching and unknown variable focal length to name three. We have built a prototype system to allow a user to spatially navigate playback viewpoints of an event of interest, using geometry automatically recovered from casually captured videos. The system, whose workings we present in this paper, necessarily estimates not only scene geometry, but also relative viewpoint position, overcoming the mentioned difficulties in the process. The only inputs required are video sequences from various viewpoints of a common scene, as are readily available online from sporting and music events. Our methods make no assumption of the synchronization of the input and do not require file metadata, instead exploiting the video to self-calibrate. The footage need only contain some camera rotation with little translation?for hand-held event footage a likely occurrence.

Retrofitting the domestic built environment: investigating household perspectives towards energy efficiency technologies and behaviour

Pelenur, Marcos
Fonte: University of Cambridge; Department of Engineering Publicador: University of Cambridge; Department of Engineering
Tipo: Thesis; doctoral; PhD
EN
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Retrofitting the UK domestic built environment presents an excellent opportunity to improve its energy performance. However, retrofitting homes is a complex challenge conflated by multiple factors. Due to this complexity, a shortfall exists between the full potential and realised adoption of energy efficiency measures in the UK, a phenomenon termed the ?Energy Efficiency Gap?. While a number of technical or economic factors may help explain this gap, difficult to quantify factors, such as social motivations, barriers, and viewpoints towards energy are also significant and often under-emphasised in public policy. As such, in order to improve the understanding of the Energy Efficiency Gap and the uptake of future retrofit initiatives, this research adopted a socio-technical approach that considered social and technical retrofit factors together. Specifically, this research collected data from interviews, questionnaires, and a Q Study in the cities of Manchester and Cardiff, alongside a questionnaire that measured energy efficiency technology and behaviour preferences. An original contribution to knowledge was using the data to empirically identify motivations and barriers to adopting energy efficient technologies, as well as identifying household viewpoints towards energy use and linking them to retrofit technology and energy efficiency behaviour preferences. As a result of this research...

Briga de família ou ruptura metodológica na teoria crítica (Habermas X Honneth); A family quarrel: methodological rupture in critical theory (Habermas v. Honneth)

Holmes, Pablo
Fonte: Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas Publicador: Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/01/2009 POR
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Este artigo tenta lançar luz sobre as possíveis convergências e divergências entre os pontos de vista teóricos de Axel Honneth e Jürgen Habermas, dois dos mais importantes filósofos sociais das últimas décadas. Primeiramente, tenta-se, a partir de seus pressupostos metodológicos, posicioná-los ante o debate contemporâneo entre éticas do "bem" e do "justo". Depois, é incluída a intuição de que as lutas sociais por reconhecimento podem se tornar um medium relativamente frutífero para compreender a linha evolutiva que levou às instituições políticas da modernidade ocidental. Examinando-se, por fim, o papel do direito em sociedades modernas, tenta-se observar até onde pode chegar a teoria do discurso habermasiana e em que ela pode ser complementada pela teoria do reconhecimento social.; This paper attempts to analyze the convergences and divergences between the theoretical viewpoints of Habermas and Honneth, two of the most important social philosophers of the last few decades. Firstly, it compares their distinct methodological suppositions, relating them to the current debate over the contradiction between 'moral' and 'ethical' viewpoints. Next, it explores the idea that social struggles for recognition can form a theoretically productive medium for understanding the evolution of political institutions in the modern western world. Finally it examines the role played by the rule of law in modern societies...

Powers or (im) powers of Literature : Proust and Sartre; Poderes e (im) poderes da Literatura: Proust e Sartre

Barrenechea, Miguel Angel de; Unirio
Fonte: Linha de Estética do Programa de Pós-Graduação em Filosofia da UFRJ Publicador: Linha de Estética do Programa de Pós-Graduação em Filosofia da UFRJ
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Artigo Avaliado pelos Pares Formato: application/pdf
Publicado em 13/11/2012 POR
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In this paper my goal is to analyze what place art occupies in the design of two important writers: Proust and Sartre. I will try to confront both interpretations about the importance of art in general and literature in particular. Both writers, at some point in their lives, imparts the art of writing a place of privilege, an exclusive status above all other possibilities of existence. But at the end of the work of each of these authors, their interpretation on the value of the art of writing diverges until they arrived at opposing viewpoints. Then try to elucidate these perspectives on the powers or (im) powers of literature. Keywords: Proust; Sartre; Art; powers; literature.; Neste trabalho a minha proposta é analisar qual o lugar que ocupa a literatura na concepção de dois escritores relevantes: Proust e Sartre. Tentarei confrontar ambas interpretações sobre a importância da literatura. Ambos os autores, em algum momento de suas vidas, outorgam à arte de escrever um lugar de privilégio, um estatuto excludente acima de todas as outras possibilidades da existência. Contudo, no final da obra de cada um desses autores, a sua interpretação sobre o valor da arte de escrever diverge, até chegarem a posições antagônicas. Tentarei então elucidar essas posturas sobre os poderes ou (im) poderes da literatura.Palavras-chave: Proust; Sartre; Arte; poderes; literatura. Abstract: In this paper my goal is to analyze what place art occupies in the design of two important writers: Proust and Sartre. I will try to confront both interpretations about the importance of art in general and literature in particular. Both writers...

The politics of opposition in a one-party state: The case of Czechoslovakia 1977-1988.

Williams, Rosemary Caroline
Fonte: London School of Economics and Political Science Thesis Publicador: London School of Economics and Political Science Thesis
Tipo: Thesis; NonPeerReviewed Formato: application/pdf
Publicado em //1993 EN
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In conditions of normalization, political and economic stagnation and popular apathy, the Czechoslovak opposition placed its emphasis on the ostensibly 'non-oppositional' demand for human rights and legality, coupled with the development of an independent political and cultural life. The first section of this thesis presents a study of the Charter 77 movement, which for the first time united people of disparate political viewpoints behind the non-ideological demand for human rights. This demand, which is seen to be a fundamental challenge to the regime, was coupled with a new concept of politics which emphasized the 'moral foundation of all things political', and called for a moral revival or 'revolution' from below. Chartist thinking also centred on the development of independent civil initiatives and the creation of a 'parallel polis'. It emphasized the individual citizen, and sought to transform the relationship between the citizen and the state. The second section examines the spectrum of viewpoints expressed in the parallel political life in Czechoslovakia, from Marxist to conservative. Despite the reduced emphasis on ideological labels in the late '70's and '80's, basic ideological differences remained, reflecting the traditional plurality of Czechoslovak political life. The third section examines the oppositions' concern with international problems and solutions. The Czechoslovak opposition in the 1980's abandoned the idea of seeking separate national solutions...

Kirk Schneider in psychopathology

Ferreira-Martins,Bernadett de Freitas; Teixeira,José A. Carvalho
Fonte: Instituto Superior de Psicologia Aplicada Publicador: Instituto Superior de Psicologia Aplicada
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2007 EN
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Kirk Schneider emphasises that psychology needs a different grounding from traditional psychology viewpoints. He talks to us about an existential-integrative psychology grounding which has its basis on phenomenology, which is concerned with qualitative rather than quantitative methods. Human experience is seen as being artistic, creative, expressive (“free”), while at the same time it can be constrained (“limited”) by the environment and social viewpoints. If as individuals we confront and adapt we become enriched and revived. If we choose to ignore the situation, we become “polarized” and thus dysfunctional (psychopathology). Kirk Schneider clinically characterizes the “freedom-limitation dialectic” the capacity of the individual to “constrict” (draw-back), “expand” (burst-forth) and of “centring” him/herself.

Development of alternative interpretations: The story of an orphaned boy affected by HIV and AIDS and father abandonment

Meyer,Juanita
Fonte: Verbum et Ecclesia Publicador: Verbum et Ecclesia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2014 EN
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This article elaborated specifically on the research journey in arriving at the development of an alternative narrative, which points beyond the local community, with reference to a broader study which aimed at addressing uncertainties about the type and nature of the relationship between HIV and AIDS and adolescent male orphans affected by this disease and all its aspects, such as poverty, exposure to crime and stigmatisation and lack in parental figures, more specifically the lack of the father figure. Subsequently, this study aimed at dissecting the orphan's life experiences in the midst of HIV and AIDS and how these experiences will influence his sexual and power relations with women and his role as future father and husband, in the absence of a father figure. The researcher wanted to explore ways in which these past and future narratives influence or affect the male orphan's view of and relationship with God and assess whether it is it just this view of and relationship with God that influence and affect his relationship with his past narrative and writing of his future narratives. This article described and explained the research process as it utilised the epistemological viewpoints of a postfoundational notion of practical theology and the methodological tools of the seven movements of a postfoundational practical theology. With the use of the metaphor of Tree of Life and the David narrative...