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A produção audiovisual como mediação na prática científica; Video-Recording production as a mediation in scientific practice.

Gonçalves, Denise Ramos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 25/11/2013 Português
Relevância na Pesquisa
66.44%
De março de 2010 a dezembro de 2012, o Observatório de Comunicação, Liberdade de Expressão e Censura (OBCOM) da Universidade de São Paulo (USP) desenvolveu a pesquisa Opinião Pública e Censura no Mundo Contemporâneo. Para abarcar a complexidade e a diversidade de pontos de vista, diferentes instrumentos de investigação foram empregados, dentre eles, a produção de vídeo-entrevistas. Consideramos relevante avivar o debate a incorporação da linguagem audiovisual ao trabalho de pesquisa empírica no âmbito das Ciências Humanas e Sociais tanto para ressaltar quanto justificar possibilidades renovadas de postura, abordagem, interação e divulgação de nossa produção científica. O processo desta proposta audiovisual em seus aspectos epistemológicos, teóricos e técnicos foi o objeto deste trabalho. Partindo da experiência de produção, a metodologia que adotamos converge com experiências contemporâneas da Antropologia, Ciências Sociais, Cinema e Documentário. Sendo assim, a construção da pesquisa colocou em relevo as questões: a) O debate sobre a incorporação das imagens ao trabalho científico e a validade de uma metodologia na pesquisa empírica com audiovisual; b) O questionamento do uso de mídias a partir das Ciências da Comunicação; c) Como o audiovisual foi incorporado em uma pesquisa sobre Opinião Pública e suas possibilidades de análises; d) As renovadas posturas de abordagem...

Home entertainment: desenvolvimento de Backwards Recording e reestruturação do Vídeo On demand

Zhan, YuGuo
Fonte: Universidade de Lisboa Publicador: Universidade de Lisboa
Tipo: Dissertação de Mestrado
Publicado em //2007 Português
Relevância na Pesquisa
36.49%
Trabalho de projecto de mestrado em Engenharia Informática, apresentado à Universidade de Lisboa, através da Faculdade de Ciências, 2007; No mercado competitivo das telecomunicações, os serviços de valor acrescentado têm um papel decisivo no sucesso do negócio. Os benefícios da banda larga, aliada a evolução do mercado televisivo, permitem aos operadores fornecer um conjunto inovador de serviços utilizando a plataforma de Internet Protocol Television. Este documento é a versão pública do relatório que descreve o trabalho realizado no projecto “SURPASS Home Entertainment” (HES) da Nokia Siemens Network Portugal, com ênfase em Home Entertainment na área de Internet Protocol Television, no âmbito da disciplina Projecto em Engenharia Informática do Mestrado em Engenharia Informática da Faculdade de Ciências da Universidade de Lisboa. O projecto HES é constituído por diversos módulos referentes a cada serviço específico. Este documento reflecte o trabalho desenvolvido na funcionalidade de Time Shift TV para a implementação de uma nova funcionalidade denominada de Backward Recording, permitindo um novo modo de gravação de conteúdos; e a reestruturação do módulo de vídeo On Demand tendo como principais objectivos a definição de uma interface funcional e a redução de dependências em relação aos restantes módulos do sistema. Com a concretização da reestruturação...

Cine photography and video recording of anterior segment fluorescein angiography.

Marsh, R J; Ford, S M
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /09/1978 Português
Relevância na Pesquisa
46.35%
A description is given of apparatus and technique for carrying out cine photography and video recording of anterior segment fluorescein angiography. We found cine best for single-frame analysis and video tape recording less expensive.

Video techniques and data compared with observation in emergency trauma care

Mackenzie, C; Xiao, Y
Fonte: BMJ Group Publicador: BMJ Group
Tipo: Artigo de Revista Científica
Publicado em /12/2003 Português
Relevância na Pesquisa
36.62%
Video recording is underused in improving patient safety and understanding performance shaping factors in patient care. We report our experience of using video recording techniques in a trauma centre, including how to gain cooperation of clinicians for video recording of their workplace performance, identify strengths of video compared with observation, and suggest processes for consent and maintenance of confidentiality of video records. Video records are a rich source of data for documenting clinician performance which reveal safety and systems issues not identified by observation. Emergency procedures and video records of critical events identified patient safety, clinical, quality assurance, systems failures, and ergonomic issues. Video recording is a powerful feedback and training tool and provides a reusable record of events that can be repeatedly reviewed and used as research data. It allows expanded analyses of time critical events, trauma resuscitation, anaesthesia, and surgical tasks. To overcome some of the key obstacles in deploying video recording techniques, researchers should (1) develop trust with video recorded subjects, (2) obtain clinician participation for introduction of a new protocol or line of investigation...

Video recording in general practice: the patients do mind

Servant, John B.; Matheson, John A.B.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /12/1986 Português
Relevância na Pesquisa
46.18%
The consent rate for video recording of consultations was examined in a semi-rural training practice in Scotland using a sample of over 1000 patients. An attempt was made to reduce the coercive methods of obtaining consent used in previous studies. In a first study explanatory letters were left in the waiting area — 273 patients returning to reception were asked if they wished to be filmed at a later date — 61 patients (22%) agreed. In a second study 830 patients were handed an explanatory letter asking if they wished to be filmed — 48 patients (6%) volunteered. The overall consent rate for the two studies combined was 10%. The low rate of consent obtained from these patients questions the propriety of using coercive methods.

Patient interest in video recording of colonoscopy: A survey

Raghavendra, Meghana; Rex, Douglas K
Fonte: The WJG Press and Baishideng Publicador: The WJG Press and Baishideng
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
46.18%
AIM: To find if patients are interested in obtaining a video recording of their colonoscopy procedure.

Avaliação do network calculus e VCC na caracterização de vídeo MPEG para sistemas multimídia

Fergutz, Laurinei
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Relevância na Pesquisa
46.3%
The MPEG video coding standard has algorithms for analyzing temporal and spatial video’s redundancies. Therefore, a great variation of data rate is observed in a video sequence. Consequently, planning, design and utilization of the necessary resources for playing video is not an easy task in multimedia systems. This work evaluates the application of Network Calculus (NC) and Variability Characterization Curve (VCC) approaches in MPEG video characterization by providing useful information to setup multimedia systems. Usually, NC theory is applied to obtain performance bounds for packet networks while VCC provides techniques to obtain lower and upper performance bounds for a computational system. However in this work, both NC and VCC are applied to define performance limits expressed as parameters to be used in this work to evaluate resource savings. In addition, a new method is proposed by adding information to the set of parameters used for video characterization. For evaluating these methods in several conditions, a set of tests in accomplished in different configurations with videos MPEG-2, MPEG-4 and H264/AVC. The result is a set of parameters that can be used to characterize videos and point out particularities and requirements imposed by each video to multimedia systems. Finally...

A systematic review of economic analyses of telehealth services using real time video communication

Wade, V.; Karnon, J.; Elshaug, A.; Hiller, J.
Fonte: BioMed Central Ltd. Publicador: BioMed Central Ltd.
Tipo: Artigo de Revista Científica
Publicado em //2010 Português
Relevância na Pesquisa
46.15%
Background: Telehealth is the delivery of health care at a distance, using information and communication technology. The major rationales for its introduction have been to decrease costs, improve efficiency and increase access in health care delivery. This systematic review assesses the economic value of one type of telehealth delivery - synchronous or real time video communication - rather than examining a heterogeneous range of delivery modes as has been the case with previous reviews in this area. Methods: A systematic search was undertaken for economic analyses of the clinical use of telehealth, ending in June 2009. Studies with patient outcome data and a non-telehealth comparator were included. Cost analyses, non-comparative studies and those where patient satisfaction was the only health outcome were excluded. Results: 36 articles met the inclusion criteria. 22(61%) of the studies found telehealth to be less costly than the non-telehealth alternative, 11(31%) found greater costs and 3 (9%) gave the same or mixed results. 23 of the studies took the perspective of the health services, 12 were societal, and one was from the patient perspective. In three studies of telehealth to rural areas, the health services paid more for telehealth...

Accurate position monitoring and improved supine-dependent obstructive sleep apnea with a new position recording and supine avoidance device

Bignold, J.; Mercer, J.; Antic, N.; McEvoy, R.; Catcheside, P.
Fonte: The American Academy of Sleep Medicine Publicador: The American Academy of Sleep Medicine
Tipo: Artigo de Revista Científica
Publicado em //2011 Português
Relevância na Pesquisa
46.35%
Study Objectives: Approximately 30% of obstructive sleep apnea (OSA) patients have supine-predominant OSA, and simply avoiding supine sleep should normalise respiratory disturbance event rates. However, traditional supine-avoidance therapies are inherently uncomfortable, and treatment adherence is poor and difficult to monitor objectively. This study evaluated the efficacy of a novel, potentially more acceptable position monitor and supine-avoidance device for managing supine-predominant OSA and snoring. Design and Setting: In-laboratory evaluation of position recording accuracy versus video recordings (validation study), and randomized controlled crossover trial of active versus inactive supine-avoidance therapy in the home setting (efficacy study). Patients: 17 patients undergoing in-laboratory sleep studies (validation) and 15 patients with supine-predominant OSA (efficacy). Interventions: Efficacy study: 1 week of inactive and 1 week of active treatment in randomized order, separated by 1 week. Measurements and Results: Agreement between 30-sec epoch-based posture classifications from device versus video records was high (median κ 0.95, interquartile range: 0.88-1.00), and there was good supine time agreement (bias 0.3%, 95%CI: −4.0% to 4.6%). In the efficacy study...

La grabaci??n en video es una herramienta que mejora la pr??ctica docente

Mu??oz Alf??rez, Mar??a Jos??; Nestares, Teresa; Samaniego-S??nchez, Cristina; Rufi??n-Henares, Jos?? A.
Fonte: Universidad de Granada, Facultad de Farmacia Publicador: Universidad de Granada, Facultad de Farmacia
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
56.39%
Los profesores de Universidad en muchas ocasiones comienzan su carrera docente sin tener una preparaci??n adecuada para el desarrollo de su profesi??n. Se tienen que enfrentar a un alumnado numeroso y diverso en conocimientos. Utilizan unas t??cnicas docentes que casi siempre son las que han visto en sus propios profesores y est??n perdidos en un mundo nuevo que se les puede hacer muy dif??cil sino reciben ayuda. En este sentido, la Universidad de Granada puso hace dos a??os en marcha un proceso de mentorizaci??n de profesores que se iniciaban en la docencia por profesores veteranos que ya ten??an al menos 20 a??os de experiencia docente. Una de las t??cnicas para la mejora de la pr??ctica docente es la grabaci??n en video de clases impartidas por los profesores principiantes. Durante el curso acad??mico se graban clases en varias ocasiones dejando un plazo m??nimo de un mes entre cada una. Los videos los visualizan por separado, profesores noveles y mentores, para hacer una cr??tica que despu??s ponen en com??n en la observaci??n conjunta. Se responde a unos cuestionarios que repasan los aspectos posturales, de lenguaje, de metodolog??a, de evaluaci??n, de integraci??n, de respuesta etc. Los resultados evaluados por los profesores principiantes y mentores se comentan para obtener unas conclusiones y as?? actuar para corregir los fallos detectados. Por la experiencia que hemos tenido la visualizaci??n en video es una buena herramienta para mejorar la pr??ctica docente.; The University teachers in many occasions begin their educational career without having a preparation adapted for the development of their profession. They have to face to numerous students with diverse previous knowledge. The University teachers use educational technologies that almost always are those that they have seen in their own teachers and are lost in a new world that can make them very difficult if they do not receive help. In this sense...

Comparative population assessments of Nautilus sp. in the Philippines, Australia, Fiji, and American Samoa using baited remote underwater video systems

Barord, G.J.; Dooley, F.; Dunstan, A.; Ilano, A.; Keister, K.N.; Neumeister, H.; Preuss, T.; Schoepfer, S.; Ward, P.D.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em //2014 Português
Relevância na Pesquisa
46.1%
The extant species of Nautilus and Allonautilus (Cephalopoda) inhabit fore-reef slope environments across a large geographic area of the tropical western Pacific and eastern Indian Oceans. While many aspects of their biology and behavior are now well-documented, uncertainties concerning their current populations and ecological role in the deeper, fore-reef slope environments remain. Given the historical to current day presence of nautilus fisheries at various locales across the Pacific and Indian Oceans, a comparative assessment of the current state of nautilus populations is critical to determine whether conservation measures are warranted. We used baited remote underwater video systems (BRUVS) to make quantitative photographic records as a means of estimating population abundance of Nautilus sp. at sites in the Philippine Islands, American Samoa, Fiji, and along an approximately 125 km transect on the fore reef slope of the Great Barrier Reef from east of Cairns to east of Lizard Island, Australia. Each site was selected based on its geography, historical abundance, and the presence (Philippines) or absence (other sites) of Nautilus fisheries The results from these observations indicate that there are significantly fewer nautiluses observable with this method in the Philippine Islands site. While there may be multiple possibilities for this difference...

Design of a video recording and tracking system for the NPS Autonomous Underwater Vehicle (AUV)

Dussourd, Xavier
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
Português
Relevância na Pesquisa
46.39%
The Naval Postgraduate School (NPS) is on the leading edge of Autonomous Underwater Vehicle (AUV) research and is currently developing a new AUV named ARIES. AUVs are principally designed to realize reconnaissance missions. To achieve such tasks, they usually utilize precise range-based sonars. Unfortunately, sonars are often unable to provide a good and efficient description of their environment due to the unclear aspect of many sonar images. To overcome such problems, the ARIES vehicle has a video camera to obtain understandable, classifiable images. This project explains the design of the video system installed on the ARIES AUV. The video system allows the AUV to automatically record and to easily understand the images provide by the AUV's camera. In this way, the AUV is now an efficient "witness" of its surroundings. This project then describes how to utilize the video for vehicle navigation. Such a capability is demonstrated by the simulation of the recovery between an AUV and a host submarine, using an underwater beacon and a light-tracking system. These results show that the use of in-water video for contact recording and navigational tracking can be practical and effective.; Prepared for: Center for Autonomous Underwater Vehicle (CAUVR) funded by the Office Naval Research (ONR) (Dr. Tom Curtain)

IMPACT OF PEER-SUPPORTED VIDEO ANALYSIS OF CLASSROOM INTERACTIONS ON TEACHER UNDERSTANDING OF THOSE INTERACTIONS

BAIG, IRFAN
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
46.24%
This qualitative case study examined a researcher-designed professional development intervention focused on improving teachers’ understanding of the interactions among students and between students and teachers in the teachers’ own classrooms. Participating teachers collaborated with the researcher in determining what they would observe and collaborated with each other in making sense of what they saw. The study analyzed participants’ discourse to characterize what they saw, how they worked together, what they found helpful in the intervention, and how they benefited. The study took place over a three-month period at a Canadian Community College in Qatar committed to guiding its faculty in adopting a learner-centred approach. Four participants worked in pairs to share and discuss video of their own classes in action as they sought to adopt the desired learner-centred approach. After a Group Training Session led by the researcher to develop a Video Analysis Framework, the pairs worked through two iterations of individual video recording and selection of a ten-minute clip for sharing, followed by paired analysis of the clips. The researcher recorded the training session, the paired discussions, interviews, and focus group discussion. Data from transcriptions and researcher field notes were analyzed inductively and connected closely with findings from the literature on the benefits of video analysis in enhancing the effectiveness of teacher-directed professional development. Faculty participants benefited from the intervention in a variety of ways. Production...

La seconde génération d'appareils vidéo et la Loi sur le droit d'auteur

PEPIN, René
Fonte: Centre de recherche en droit public (CRDP) Publicador: Centre de recherche en droit public (CRDP)
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
36.48%
En 1999 est apparue une nouvelle génération d’appareils vidéo basés sur une technologie numérique et offrant au grand public d’innombrables fonctionnalités jusqu’à présent inimaginables selon la technologie traditionnelle des magnétoscopes. En permettant, entre autres, d’éliminer les messages publicitaires et de transmettre l’enregistrement d’une émission à un tiers via les réseaux établis par les diverses entreprises développant cette technologie, ces appareils viennent bonifier l’expérience télévisuelle des consommateurs. Cependant, ces nouvelles fonctionnalités soulèvent également de nouvelles inquiétudes pour les détenteurs de droits d’auteurs. Afin d’évaluer la validité de ces inquiétudes, l’auteur trace un portrait global des problématiques juridiques pouvant émerger suite à l’apparition d’appareils vidéo numériques en sol canadien. Pour ce faire, il fait un exposé des raisons pour lesquelles la technologie employée pourrait contrevenir à certaines dispositions de la Loi sur le droit d’auteur en s’attardant à une analyse des dispositions pertinentes de cette loi et aux possibles répercussion que celles-ci pourraient avoir sur cette nouvelle génération d’appareils vidéo.; In 1999...

Comparison of video-recorded consultations with those in which patients' consent is withheld.

Coleman, T; Manku-Scott, T
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /02/1998 Português
Relevância na Pesquisa
36.62%
BACKGROUND: Video-recorded consultations are widely used for research in general practice. Recently, video recordings have begun to be used for the purposes of general practitioner (GP) registrar assessment. It is unknown, however, whether consultations in which patients withhold consent for recording differ from those that are recorded. AIM: To compare clinical problems and demographic characteristics of adult patients who consent to the video recording of consultations with those who withhold consent. METHOD: This was prospective study of 538 adult patients consulting 42 GPs, based in practices throughout Leicestershire. Each patient attended a surgery session with one of the 42 GPs between April 1995 and March 1996. Clinical presentations and demographic characteristics of patients consenting and withholding consent to the video recording of their consultations were compared. GPs' perceptions of whether patients in these two groups were distressed/upset or embarrassed were also compared. RESULTS: A total of 85.9% (462/538) of adults consented to video recording, and 14.1% (76/538) withheld consent. Multiple logistic regression revealed that patients who presented with a mental health problem were more likely to withhold consent to recording (odds ratio 2.5...

Reactions of patients to video recording of consultations in general practice.

Herzmark, G
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 03/08/1985 Português
Relevância na Pesquisa
46.18%
The potential value of video recording for examining medical consultations depends on the extent to which recordings are representative of unfilmed consultations. This paper examines the views of 295 patients in two general practices whose consultations were filmed and compares them with the views of a control group of 185 patients. Most of those who were filmed reported that the consultation was not directly affected, and no overall effect of filming was discovered when patients rated their stress after the consultations, their rapport with the doctor, or other aspects of the consultation. At one practice, however, filming was significantly associated with lower ratings of rapport between doctor and patient among those patients who reported some direct effect of filming. Patient refusal rates from other studies are also examined and shown to vary systematically--the more opportunity patients are given to decline the more likely they are to take it. Consideration of doctors' responses to being filmed would usefully complement the emphasis on the views of patients.

Does awareness of being video recorded affect doctors' consultation behaviour?

Pringle, M; Stewart-Evans, C
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /11/1990 Português
Relevância na Pesquisa
36.62%
Four general practitioners, two of whom had no previous experience of video recording in the consultation, took part in a study to assess the effect of awareness of video recording on their consultation behaviour. A video camera was sited unobtrusively in each consulting room for a month during which five randomly selected surgeries were recorded with the doctors being informed at the time, and five without their being informed. The video recorded consultations were analysed using TIMER, a tool designed to measure objectively behaviour in terms of physical, verbal and secondary activities in consultations. The proportions of time spent on the 27 consultation parameters were compared when doctors were aware and unaware of the recording, using analysis of variance. This demonstrated only one significant difference, in the low frequency parameter of the doctor's exploration of the patients' concepts (P less than 0.05). In a secondary analysis of the first four consultations in each surgery, where any effect of the presence of the video camera would be expected to be most marked, there was again only one significant difference in the 27 parameters (in patient preparation; P = 0.01). No significant difference owing to awareness of video recording was found in consultation length...

Super-Resolution of Speed Signs in Video Sequences

Mufti, Faisal; Mahony, Robert; Kim, Jonghyuk
Fonte: Institute of Electrical and Electronics Engineers (IEEE Inc) Publicador: Institute of Electrical and Electronics Engineers (IEEE Inc)
Tipo: Conference paper
Português
Relevância na Pesquisa
46.15%
This paper considers the problem of generating a high resolution (super resolved) image of an object that is visible in a sequence of low resolution video frames. We are motivated by applications where the object is moving in the video sequence, due eithe

Automated classification of cricket pitch frames in cricket video

Bananki Jayanth, Sandesh; Srinivasa, Gowri
Fonte: Universidade Autônoma de Barcelona Publicador: Universidade Autônoma de Barcelona
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em //2014 Português
Relevância na Pesquisa
46.21%
The automated detection of the cricket pitch in a video recording of a cricket match is a fundamental step in content-based indexing and summarization of cricket videos. In this paper, we propose visualcontent based algorithms to automate the extraction of video frames with the cricket pitch in focus. As a preprocessing step, we first select a subset of frames with a view of the cricket field, of which the cricket pitch forms a part. This filtering process reduces the search space by eliminating frames that contain a view of the audience, close-up shots of specific players, advertisements, etc. The subset of frames containing the cricket field is then subject to statistical modeling of the grayscale (brightness) histogram (SMoG). Since SMoG does not utilize color or domain-specific information such as the region in the frame where the pitch is expected to be located, we propose an alternative algorithm: component quantization based region of interest extraction (CQRE) for the extraction of pitch frames. Experimental results demonstrate that, regardless of the quality of the input, successive application of the two methods outperforms either one applied exclusively. The SMoG-CQRE combination for pitch frame classification yields an average accuracy of 98:6% in the best case (a high resolution video with good contrast) and an average accuracy of 87:9% in the worst case (a low resolution video with poor contrast). Since...

Produção e análise de vídeogravações em pesquisas qualitativas; Production and analysis of video recordings in qualitative research

Garcez, Andrea; Duarte, Rosalia; Eisenberg, Zena
Fonte: Universidade de São Paulo. Faculdade de Educação Publicador: Universidade de São Paulo. Faculdade de Educação
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf; application/pdf
Publicado em 01/08/2011 Português
Relevância na Pesquisa
46.1%
Uma das críticas feitas a estudos empíricos de base qualitativa diz respeito ao uso inadequado de metodologias de pesquisa, fruto de uma relação pouco criteriosa entre objeto/problema de pesquisa e procedimentos de produção de dados. Muitas vezes, deixa-se de levar em conta que a adoção de determinada metodologia é orientada pelo que é necessário fazer para obter material empírico cuja densidade e riqueza permitam uma melhor apreensão dos diferentes aspectos que envolvem o problema acerca do qual se empreende uma investigação, para que seja possível formular hipóteses bem fundamentadas. Cabe ao pesquisador escolher o método que melhor se adéqua à obtenção dos dados e aos pressupostos teóricos que a orientam, e, para tanto, ele precisa ter conhecimento de diferentes possibilidades de escolha. O presente artigo apresenta reflexões e orientações acerca do uso, cada vez mais frequente, de videogravações na realização de pesquisas qualitativas, discutindo especificidades da produção e da análise de materiais audiovisuais articulados a procedimentos de investigação em ciências sociais e humanas. As considerações apresentadas aqui foram construídas a partir da experiência com o uso desse recurso em pesquisas realizadas pelas autoras ao longo dos últimos cinco anos...