scholarly journals Observação On-line das Interações Familiares: Considerações para a Pesquisa

2021 ◽  
Vol 13 (2) ◽  
pp. 159
Author(s):  
Ambra Palazzi ◽  
Beatriz Schmidt ◽  
Cesar Augusto Piccinini
Keyword(s):  
On Line ◽  
Audio Video

A pandemia do novo coronavírus (COVID-19) tem gerado profundos impactos na sociedade, afetando a saúde física e mental dos indivíduos e as interações familiares. Na realização de pesquisas envolvendo famílias, tecnologias da informação e da comunicação (TICs) vêm sendo implementadas com o intuito de compreender as dinâmicas relacionais durante a pandemia e garantir a continuidade de estudos iniciados anteriormente. O objetivo deste estudo é apresentar possíveis adaptações, para a modalidade on-line, dos procedimentos de coleta de dados em pesquisas envolvendo observação das interações familiares. Trata-se de um artigo metodológico, em que são discutidas as potencialidades da observação on-line, como a maior abrangência geográfica e validade ecológica, mas também os desafios, como a dificuldade de padronizar os procedimentos de coleta de dados, por conta da variabilidade na qualidade dos equipamentos e da conexão de Internet. São destacados aspectos técnicos para auxiliar pesquisadores na seleção de equipamentos de áudio/vídeo e plataformas de videoconferência, bem como no planejamento e na realização da coleta de dados. A observação on-line pode favorecer a compreensão da complexidade das dinâmicas familiares durante o distanciamento social e, também, após a pandemia, caracterizando-se como uma estratégia de pesquisa eficaz para o estudo de famílias em diferentes contextos.

scholarly journals Video-based multimedia designs: A research study testing learning effectiveness

2008 ◽  
Vol 33 (3) ◽  
Author(s):  
David Reiss
Keyword(s):  
Research Study ◽  
College Freshman ◽  
Study Guide ◽  
Study Guides ◽  
Related Information ◽  
Different Types ◽  
On Line ◽  
Computer Based ◽  
Video Player ◽  
Audio Video

This paper summarizes research conducted on three computer-based video models’ effectiveness for learning based on memory and comprehension. In this quantitative study, a two-minute video presentation was created and played back in three different types of media players, for a sample of eighty-seven college freshman. The three players evaluated include a standard QuickTime video/audio player, a QuickTime player with embedded triggers that launched HTML-based study guide pages, and a Macromedia Flash-based video/audio player with a text field, with user activated links to the study guides as well as other interactive on-line resources. An assumption guiding this study was that the enhanced designs presenting different types of related information would reinforce the material and produce better comprehension and retention. However, findings indicate that the standard video player was the most effective overall, which suggests that media designs able to control the focus of a learner’s attention to one specific stream of information, a single-stream focused approach, may be the most effective way to present media-based content. Résumé: Cet article résume une étude vérifiant l’efficacité de l’apprentissage basé sur la mémorisation et la compréhension, conduite à partir de trois modèles basés sur la vidéo informatisée. Dans cette étude quantitative, une vidéo de deux minutes a été créée et lue sur trois types de lecteurs différents, pour un échantillon de 87 étudiants universitaires de première année. Les trois lecteurs évalués comprenaient un lecteur standard audio/vidéo Quicktime, un lecteur Quicktime avec déclencheurs intégrés qui lançait un guide d’étude en HTML, et un lecteur audio/vidéo Flash Macromedia avec un champ texte, comprenant des liens activés par l’usager vers des guides d’étude et d’autres ressources interactives en ligne. Une supposition guidant cette étude était que les designs enrichis présentant différents types d’informations interreliées renforceraient le matériel et produiraient une meilleure compréhension et une meilleure rétention. Cependant, les résultats indiquent que le lecteur vidéo standard était le plus efficace, ce qui suggère que les designs de médias concentrant l’attention de l’apprenant sur une source d’information spécifique seraient la meilleure façon de présenter du contenu médiatisé.

Evaluation of an Audio Mode of the Automated Medical History

1977 ◽  
Vol 16 (01) ◽  
pp. 20-23 ◽  
Author(s):  
W. W. Stead ◽  
W. E. Hammond ◽  
E. H. Estes
Keyword(s):  
Data Collection ◽  
Medical History ◽  
Automated Data Collection ◽  
Response System ◽  
Video Systems ◽  
On Line ◽  
Paper And Pencil ◽  
Audio Video ◽  
Audio System ◽  
Voice Response

The Westinghouse Voice Response System is a stand-alone hardware unit designed for automated data collection. Questions are asked in the audio mode. Responses are printed at the time of the interview and stored on magnetic tape for future retrieval. This audio system was evaluated as a method for the collection of the initial medical history. In addition, comparisons were made among three techniques of automated data collection: audio, video and paper and pencil. The audio mode of automated history taking was more effective than comparable paper and pencil and video systems in situations where the patient population was of borderline literacy. The Westinghouse Voice Response System is a viable stand-alone system for those situations in which on-line access to a computer is not available.

scholarly journals Randall's ESL Cyber Listening Lab

2002 ◽  
Vol 1 ◽  
pp. 5
Author(s):  
Rafael Seiz Ortiz
Keyword(s):  
Listening Comprehension ◽  
English Language ◽  
University Of Utah ◽  
Java Programming ◽  
Comprehension Skills ◽  
On Line ◽  
Video And Audio ◽  
English Language Institute ◽  
The University ◽  
Audio Video

<p>Interactive on-line activities to practise and reinforce listening comprehension skills in the English language in diverse formats and study styles. On-line since 1998, the Cyber Listening Lab makes use of Java programming language, and requires video and audio playing software (for example, Real Audio/Video, Divace, Windows Media Player). Plugins, software and files in general are easy to access and download.</p><p>The site is developed and maintained by Randall S. Davis, from the English Language Institute at the University of Utah (USA), and sponsored by Divace Learning Solutions.</p>

The on-line use of histogram data for high-speed correction and alignment of electron microscope images

1984 ◽  
Vol 42 ◽  
pp. 556-557
Author(s):  
William Krakow
Keyword(s):  
Power Spectrum ◽  
High Speed ◽  
Direct Memory Access ◽  
Digital Television ◽  
Contrast Transfer Function ◽  
The Past ◽  
High Resolution Tem ◽  
On Line ◽  
Correction Of Astigmatism ◽  
The Fourier Transform

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.

Image registration with a computer driven S.T.E.M.

1978 ◽  
Vol 36 (1) ◽  
pp. 98-99
Author(s):  
A.M.H. Schepman ◽  
J.A.P. van der Voort ◽  
J.E. Mellema
Keyword(s):  
Spot Size ◽  
Scanning Transmission Electron Microscope ◽  
Small Computer ◽  
Structural Studies ◽  
Area Of Interest ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Specimen Area ◽  
On Line ◽  
Minimum Distances

A Scanning Transmission Electron Microscope (STEM) was coupled to a small computer. The system (see Fig. 1) has been built using a Philips EM400, equipped with a scanning attachment and a DEC PDP11/34 computer with 34K memory. The gun (Fig. 2) consists of a continuously renewed tip of radius 0.2 to 0.4 μm of a tungsten wire heated just below its melting point by a focussed laser beam (1). On-line operation procedures were developped aiming at the reduction of the amount of radiation of the specimen area of interest, while selecting the various imaging parameters and upon registration of the information content. Whereas the theoretical limiting spot size is 0.75 nm (2), routine resolution checks showed minimum distances in the order 1.2 to 1.5 nm between corresponding intensity maxima in successive scans. This value is sufficient for structural studies of regular biological material to test the performance of STEM over high resolution CTEM.

Design and calibration of an IVEM for general 3-dimensional imaging of non-diffracting materials

1992 ◽  
Vol 50 (2) ◽  
pp. 1040-1041
Author(s):  
Neil Rowlands ◽  
Jeff Price ◽  
Michael Kersker ◽  
Seichi Suzuki ◽  
Steve Young ◽  
...  
Keyword(s):  
3D Imaging ◽  
Tomographic Reconstruction ◽  
Three Dimensional ◽  
3 Dimensional ◽  
3D Microstructure ◽  
Image Translation ◽  
Digital Correlation ◽  
On Line ◽  
Mechanical Stage ◽  
Projection Angle

Three-dimensional (3D) microstructure visualization on the electron microscope requires that the sample be tilted to different positions to collect a series of projections. This tilting should be performed rapidly for on-line stereo viewing and precisely for off-line tomographic reconstruction. Usually a projection series is collected using mechanical stage tilt alone. The stereo pairs must be viewed off-line and the 60 to 120 tomographic projections must be aligned with fiduciary markers or digital correlation methods. The delay in viewing stereo pairs and the alignment problems in tomographic reconstruction could be eliminated or improved by tilting the beam if such tilt could be accomplished without image translation.A microscope capable of beam tilt with simultaneous image shift to eliminate tilt-induced translation has been investigated for 3D imaging of thick (1 μm) biologic specimens. By tilting the beam above and through the specimen and bringing it back below the specimen, a brightfield image with a projection angle corresponding to the beam tilt angle can be recorded (Fig. 1a).

Software pattern recognition applied to nanodiffraction patterns from a STEM instrument

1986 ◽  
Vol 44 ◽  
pp. 694-695
Author(s):  
G.Y. Fan ◽  
J.M. Cowley
Keyword(s):  
Image Processing ◽  
Pattern Recognition ◽  
Computer Software ◽  
Processing System ◽  
Light Level ◽  
Host Computer ◽  
Low Light ◽  
Image Processing System ◽  
Recent Developments ◽  
On Line

In recent developments, the ASU HB5 has been modified so that the timing, positioning, and scanning of the finely focused electron probe can be entirely controlled by a host computer. This made the asynchronized handshake possible between the HB5 STEM and the image processing system which consists of host computer (PDP 11/34), DeAnza image processor (IP 5000) which is interfaced with a low-light level TV camera, array processor (AP 400) and various peripheral devices. This greatly facilitates the pattern recognition technique initiated by Monosmith and Cowley. Software called NANHB5 is under development which, instead of employing a set of photo-diodes to detect strong spots on a TV screen, uses various software techniques including on-line fast Fourier transform (FFT) to recognize patterns of greater complexity, taking advantage of the sophistication of our image processing system and the flexibility of computer software.

Thickness Measurement in the AEM by Macintosh-Based Analysis of Two-Beam Convergent Beam Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 504-505
Author(s):  
John F. Mansfield ◽  
Douglas C. Crawford
Keyword(s):  
Electron Microscope ◽  
Video Camera ◽  
Thickness Measurement ◽  
Specimen Thickness ◽  
Crystalline Materials ◽  
Beam Dynamic ◽  
Line Measurement ◽  
On Line ◽  
Image Position ◽  
Convergent Beam

A method has been developed that allows on-line measurement of the thickness of crystalline materials in the analytical electron microscope. Two-beam convergent beam electron diffraction (CBED) patterns are digitized from a JEOL 2000FX electron microscope into an Apple Macintosh II microcomputer via a Gatan #673 CCD Video Camera and an Imaging Systems Technology Video 1000 frame-capture board. It is necessary to know the lattice parameters of the sample since measurements are made of the spacing of the diffraction discs in order to calibrate the pattern. The sample thickness is calculated from measurements of the spacings of the fringes that are seen in the diffraction discs. This technique was pioneered by Kelly et al, who used the two-beam dynamic theory of MacGillavry relate the deviation parameter (Si) of the ith fringe from the exact Bragg condition to the specimen thickness (t) with the equation:Where ξg, is the extinction distance for that reflection and ni is an integer.

Recent developments in automated Transmission Electron MI

1989 ◽  
Vol 47 ◽  
pp. 46-47
Author(s):  
W.J. de Ruijter ◽  
P. Rez ◽  
David J. Smith
Keyword(s):  
Image Analysis ◽  
Computer Image ◽  
Lens Design ◽  
Computer Image Analysis ◽  
Transmission Electron ◽  
Resolution Electron ◽  
Recent Developments ◽  
On Line ◽  
Routine Procedures ◽  
Near Future

There is growing interest in the on-line use of computers in high-resolution electron n which should reduce the demands on highly skilled operators and thereby extend the r of the technique. An on-line computer could obviously perform routine procedures hand, or else facilitate automation of various restoration, reconstruction and enhan These techniques are slow and cumbersome at present because of the need for cai micrographs and off-line processing. In low resolution microscopy (most biologic; primary incentive for automation and computer image analysis is to create a instrument, with standard programmed procedures. In HREM (materials researc computer image analysis should lead to better utilization of the microscope. Instru (improved lens design and higher accelerating voltages) have improved the interpretab the level of atomic dimensions (approximately 1.6 Å) and instrumental resolutior should become feasible in the near future.

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