Browsing by Subject "Video"

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Open Access
Achieving self-reflection through videotaped self-observation
(2007) Hasanbaşoğlu, Burçin
This study was designed to investigate whether videotaped self-observation contributes to self-reflection and whether teaching experience results in differences between teachers in terms of their levels of reflective thinking. Two trainee teachers attending the METU in-service teacher training course – one experienced and one inexperienced – and two teacher trainers conducting the course participated in this study. Data were collected through reflective narratives written after teacher observations, interviews and think-aloud protocols (TAPs). In this study, one of the teacher observations of each trainee was videorecorded, and the trainees were asked to reflect on their teaching before watching their recorded lesson in an interview, while watching it in a think-aloud protocol, and after watching it in a reflective narrative. Each trainee’s pre- and while-video reflections were compared to explore whether videotaped self-observation contributed to the extent and levels of teachers’ reflection. After analyzing each trainee’s oral and written reflections before and after video, the reflections of the two trainees were also compared to examine whether teaching experience was a determining factor in high levels of reflection. All the data in this study were qualitatively analyzed, and in this analysis the framework for levels of reflective thinking devised by the researcher was used to determine trainees’ levels of reflection. The findings of this study indicated that observing their videotaped lesson contributed considerably to the trainees’ self-reflection, both in terms of the extent and levels of their reflective thinking. Both teachers were able to reflect on an increased number of points in their lessons after self-observation and demonstrated a remarkable growth in high level reflections. However, the extent to which the trainees achieved more detailed and higher level reflections did not seem to result from teaching experience, which might suggest that there may be some other factors contributing to self-reflection.
Open Access
Constructing the visual-essay in theory and practice : a home-dweller's life through the essayistic
(2014) Çakar, Arın Ada
Montaigne’s establishment of the essay as a literary genre brought about a revolution of the mind in that it made possible an infinity of new manner’s of expressing thought and human emotion possible. The essayistic spirit thus born by Montaigne’s midwifery infiltrated in the last century the artistic genres of film and photography. The essay found a visualized mode of practice, commonly observable in contemporary art today. This more recent embodiment of the essayistic expression, however, appeal to qualities and operates through principles that expand on what the literary genre entails. In light of what these are, this thesis explores the evolution of the essayistic from its literary expression discussed by Adorno and Lukacs, to its examples in film and photography and these examples’ scholarly consideration in the available literature. Generic utility of the term essay is then problematized and “visual-essay” is proposed as a more proper and comprehensive term. The point of origin of these discussions are found in a visual-essay project, entitled “A(WAITING) HOME / EV (DE) BEKLER”, which I have produced. Accordingly, the evaluation of the essayistic mode of expression in contemporary art is conducted in perspective of the thematic of home, home-dweller and the seemingly essayistic relationship of the two. This is done in terms of both a theoretical deliberation of home-dwelling, and a reflection upon how this thematic had been explored by my project, thus purposed to be reflective on home as much as on the very generic form in which it found expression, that is the visuallyessayistic.
Open Access
An index structure for moving objects in video databases
(1999) Yavuz, Tuba
Modeling moving objects and Iiandling various types of motion queries are interesting topics to investigate in the area of video databases. In one type of motion queries, motion of multiple objects is specified by the changes in relative spatial positions of objects. Answering such kind of queries, that involve motion of multiple objects whose identifications cire not specified, requires some type of indexing because the time complexity of processing such a query in the absence of an index structure is 0{N \l{N — n)!), where N is the number of objects in the database and n is the number of objects in the query. In this work, we propose a spatio-temporal index structure, which we call ,S'M/A7-index, and compare its performance against a similar scheme proposed in [18]. The scheme presented in [18] consists of a constraint satisfaction algorithm, which is called Join Window Reduction (JW R ), combined with a spatial index structure (R*- tree). Experimental results indicate thcit SMIST-'mdex outperforms the JW R algorithm. Also, SMIST-'mdex is shown to be scalable to increasing number of frames and objects.
Open Access
A performance evaluation framework of a rate-controlled MPEG video transmission over UMTS networks
(IEEE, 2007-07) Akar, Nail; Barbera, M.; Budzisz, L.; Ferrùs, R.; Kankaya, Emre; Schembra, G.
UMTS is designed to offer high bandwidth radio access with QoS assurances for multimedia communications. In particular, real-time video communications services are expected to become a successful experience under UMTS networks. In this context, a video transmission service can be designed over the basis that UMTS can provide either a constant bit rate data channel or a dynamic variable bit rate data channel adapted to load conditions. In this latter approach, which is more efficient for both the user and the service provider, multimedia sources have to be timely designed in order to adapt their output rate to the instantaneous allowed channel rate. The target of this paper is to define an analytical model of adaptive real-time video sources in a UMTS network where system resources are dynamically shared among active users. © 2007 IEEE.
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