WorldWideScience

Sample records for video evaluation form

  1. Video Tape Recording Evaluation Protocol Behavior Rating Form - Part 1: Communication.

    Science.gov (United States)

    Curtis, W. Scott; Donlon, Edward T.

    Presented is the behavior rating scale designed for use with a video tape protocol for examination of multiply handicapped deaf blind children, whose development and evaluation are discussed in EC 040 599. The behavioral rating scale consists of five sections: unstructured orientation of child in examining area, child's task orientation and…

  2. Minimally Invasive Procedures - Direct and Video-Assisted Forms in the Treatment of Heart Diseases

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Josué Viana Neto, E-mail: jvcn@uol.com.br [Instituto do Coração do Nordeste (INCONE), Fortaleza, CE (Brazil); Universidade de Fortaleza (UNIFOR), Fortaleza, CE (Brazil); Melo, Emanuel Carvalho; Silva, Juliana Fernandes [Instituto do Coração do Nordeste (INCONE), Fortaleza, CE (Brazil); Rebouças, Leonardo Lemos; Corrêa, Larissa Chagas; Germano, Amanda de Queiroz [Universidade de Fortaleza (UNIFOR), Fortaleza, CE (Brazil); Machado, João José Aquino [Instituto do Coração do Nordeste (INCONE), Fortaleza, CE (Brazil)

    2014-03-15

    Minimally invasive cardiovascular procedures have been progressively used in heart surgery. To describe the techniques and immediate results of minimally invasive procedures in 5 years. Prospective and descriptive study in which 102 patients were submitted to minimally invasive procedures in direct and video-assisted forms. Clinical and surgical variables were evaluated as well as the in hospital follow-up of the patients. Fourteen patients were operated through the direct form and 88 through the video-assisted form. Between minimally invasive procedures in direct form, 13 had aortic valve disease. Between minimally invasive procedures in video-assisted forms, 43 had mitral valve disease, 41 atrial septal defect and four tumors. In relation to mitral valve disease, we replaced 26 and reconstructed 17 valves. Aortic clamp, extracorporeal and procedure times were, respectively, 91,6 ± 21,8, 112,7 ± 27,9 e 247,1 ± 20,3 minutes in minimally invasive procedures in direct form. Between minimally invasive procedures in video-assisted forms, 71,6 ± 29, 99,7 ± 32,6 e 226,1 ± 42,7 minutes. Considering intensive care and hospitalization times, these were 41,1 ± 14,7 hours and 4,6 ± 2 days in minimally invasive procedures in direct and 36,8 ± 16,3 hours and 4,3 ± 1,9 days in minimally invasive procedures in video-assisted forms procedures. Minimally invasive procedures were used in two forms - direct and video-assisted - with safety in the surgical treatment of video-assisted, atrial septal defect and tumors of the heart. These procedures seem to result in longer surgical variables. However, hospital recuperation was faster, independent of the access or pathology.

  3. The Use of Animated Videos to Illustrate Oral Solid Dosage Form Manufacturing in a Pharmaceutics Course.

    Science.gov (United States)

    Yellepeddi, Venkata Kashyap; Roberson, Charles

    2016-10-25

    Objective. To evaluate the impact of animated videos of oral solid dosage form manufacturing as visual instructional aids on pharmacy students' perception and learning. Design. Data were obtained using a validated, paper-based survey instrument designed to evaluate the effectiveness, appeal, and efficiency of the animated videos in a pharmaceutics course offered in spring 2014 and 2015. Basic demographic data were also collected and analyzed. Assessment data at the end of pharmaceutics course was collected for 2013 and compared with assessment data from 2014, and 2015. Assessment. Seventy-six percent of the respondents supported the idea of incorporating animated videos as instructional aids for teaching pharmaceutics. Students' performance on the formative assessment in 2014 and 2015 improved significantly compared to the performance of students in 2013 whose lectures did not include animated videos as instructional aids. Conclusions. Implementing animated videos of oral solid dosage form manufacturing as instructional aids resulted in improved student learning and favorable student perceptions about the instructional approach. Therefore, use of animated videos can be incorporated in pharmaceutics teaching to enhance visual learning.

  4. The Use of Animated Videos to Illustrate Oral Solid Dosage Form Manufacturing in a Pharmaceutics Course

    Science.gov (United States)

    Roberson, Charles

    2016-01-01

    Objective. To evaluate the impact of animated videos of oral solid dosage form manufacturing as visual instructional aids on pharmacy students’ perception and learning. Design. Data were obtained using a validated, paper-based survey instrument designed to evaluate the effectiveness, appeal, and efficiency of the animated videos in a pharmaceutics course offered in spring 2014 and 2015. Basic demographic data were also collected and analyzed. Assessment data at the end of pharmaceutics course was collected for 2013 and compared with assessment data from 2014, and 2015. Assessment. Seventy-six percent of the respondents supported the idea of incorporating animated videos as instructional aids for teaching pharmaceutics. Students’ performance on the formative assessment in 2014 and 2015 improved significantly compared to the performance of students in 2013 whose lectures did not include animated videos as instructional aids. Conclusions. Implementing animated videos of oral solid dosage form manufacturing as instructional aids resulted in improved student learning and favorable student perceptions about the instructional approach. Therefore, use of animated videos can be incorporated in pharmaceutics teaching to enhance visual learning. PMID:27899837

  5. Student Evaluation of Online Pharmaceutical Compounding Videos

    Science.gov (United States)

    Park, Hanna L.

    2016-01-01

    Objective. To describe pharmacy students’ views on the effectiveness of an expansion of the compounding laboratory website at the UNC Eshelman School of Pharmacy. Methods. Originally, there were 39 videos and three animations available. In 2011, an additional 59 videos and two animations were added. Concurrently, all of the interactive questions were updated to fully integrate with the expanded video library. Students were surveyed about the expanded video library regarding accessibility, functionality, and usefulness, and how using the library impacted their learning of compounding. Surveys were analyzed with descriptive statistics. Means and SDs were calculated for the rating scale questions; independent t tests and Wilcoxon nonparametric tests were used to find differences between professional classes and campuses. Analytical results were evaluated with a one-way analysis of variance (ANOVA), z test, and a homogeneity of variance (Levene’s) test. Results. The response rate to the survey was 85%. Compounding videos were used by 386/391 students. Thirty-four percent of students used the videos an average of 30 minutes or less per week; 56% used the videos 1–2 hours per week. Approximately 80% of students were satisfied with the functionality and accessibility of the videos. All students, regardless of professional year or campus affiliation, put their confidence/competence at about 70% of the rating scale. Conclusions. As no standardized compounding curriculum was found in US schools of pharmacy and students reported being satisfied with the website, it could be an accessible, functional, and useful resource for pharmaceutical compounding in schools of pharmacy. PMID:27073283

  6. A Framework for Advanced Video Traces: Evaluating Visual Quality for Video Transmission Over Lossy Networks

    Directory of Open Access Journals (Sweden)

    Reisslein Martin

    2006-01-01

    Full Text Available Conventional video traces (which characterize the video encoding frame sizes in bits and frame quality in PSNR are limited to evaluating loss-free video transmission. To evaluate robust video transmission schemes for lossy network transport, generally experiments with actual video are required. To circumvent the need for experiments with actual videos, we propose in this paper an advanced video trace framework. The two main components of this framework are (i advanced video traces which combine the conventional video traces with a parsimonious set of visual content descriptors, and (ii quality prediction schemes that based on the visual content descriptors provide an accurate prediction of the quality of the reconstructed video after lossy network transport. We conduct extensive evaluations using a perceptual video quality metric as well as the PSNR in which we compare the visual quality predicted based on the advanced video traces with the visual quality determined from experiments with actual video. We find that the advanced video trace methodology accurately predicts the quality of the reconstructed video after frame losses.

  7. Generic Film Forms for Dynamic Virtual Video Synthesis

    NARCIS (Netherlands)

    C.A. Lindley

    1999-01-01

    textabstractThe FRAMES project within the RDN CRC (Cooperative Research Centre for Research Data Networks) is developing an experimental environment for video content-based retrieval and dynamic virtual video synthesis from archives of video data. The FRAMES research prototype is a video synthesis

  8. [PIC Program Evaluation Forms.

    Science.gov (United States)

    Short, N. J.

    These 4 questionnaires are designed to elicit teacher and parent evaluations of the Prescriptive Instruction Center (PIC) program. Included are Teacher Evaluation of Program Effectiveness (14 items), M & M Evaluation of Program Implementation (methods and materials specialists; 11 items), Teacher Evaluation of Program Effectiveness--Case Study…

  9. An Evaluation of Video-to-Video Face Verification

    NARCIS (Netherlands)

    Poh, N.; Chan, C.H.; Kittler, J.; Marcel, S.; Mc Cool, C.; Argones Rúa, E.; Alba Castro, J.L.; Villegas, M.; Paredes, R.; Štruc, V.; Pavešić, N.; Salah, A.A.; Fang, H.; Costen, N.

    2010-01-01

    Person recognition using facial features, e.g., mug-shot images, has long been used in identity documents. However, due to the widespread use of web-cams and mobile devices embedded with a camera, it is now possible to realize facial video recognition, rather than resorting to just still images. In

  10. Evaluation of experimental UAV video change detection

    Science.gov (United States)

    Bartelsen, J.; Saur, G.; Teutsch, C.

    2016-10-01

    During the last ten years, the availability of images acquired from unmanned aerial vehicles (UAVs) has been continuously increasing due to the improvements and economic success of flight and sensor systems. From our point of view, reliable and automatic image-based change detection may contribute to overcoming several challenging problems in military reconnaissance, civil security, and disaster management. Changes within a scene can be caused by functional activities, i.e., footprints or skid marks, excavations, or humidity penetration; these might be recognizable in aerial images, but are almost overlooked when change detection is executed manually. With respect to the circumstances, these kinds of changes may be an indication of sabotage, terroristic activity, or threatening natural disasters. Although image-based change detection is possible from both ground and aerial perspectives, in this paper we primarily address the latter. We have applied an extended approach to change detection as described by Saur and Kr uger,1 and Saur et al.2 and have built upon the ideas of Saur and Bartelsen.3 The commercial simulation environment Virtual Battle Space 3 (VBS3) is used to simulate aerial "before" and "after" image acquisition concerning flight path, weather conditions and objects within the scene and to obtain synthetic videos. Video frames, which depict the same part of the scene, including "before" and "after" changes and not necessarily from the same perspective, are registered pixel-wise against each other by a photogrammetric concept, which is based on a homography. The pixel-wise registration is used to apply an automatic difference analysis, which, to a limited extent, is able to suppress typical errors caused by imprecise frame registration, sensor noise, vegetation and especially parallax effects. The primary concern of this paper is to seriously evaluate the possibilities and limitations of our current approach for image-based change detection with respect

  11. Evaluating and Implementing JPEG XR Optimized for Video Surveillance

    OpenAIRE

    Yu, Lang

    2010-01-01

    This report describes both evaluation and implementation of the new coming image compression standard JPEG XR. The intention is to determine if JPEG XR is an appropriate standard for IP based video surveillance purposes. Video surveillance, especially IP based video surveillance, currently has an increasing role in the security market. To be a good standard for surveillance, the video stream generated by the camera is required to be low bit-rate, low latency on the network and at the same tim...

  12. Performance evaluation software moving object detection and tracking in videos

    CERN Document Server

    Karasulu, Bahadir

    2013-01-01

    Performance Evaluation Software: Moving Object Detection and Tracking in Videos introduces a software approach for the real-time evaluation and performance comparison of the methods specializing in moving object detection and/or tracking (D&T) in video processing. Digital video content analysis is an important item for multimedia content-based indexing (MCBI), content-based video retrieval (CBVR) and visual surveillance systems. There are some frequently-used generic algorithms for video object D&T in the literature, such as Background Subtraction (BS), Continuously Adaptive Mean-shift (CMS),

  13. An Evaluation of Educational Neurological Eye Movement Disorder Videos Posted on Internet Video Sharing Sites.

    Science.gov (United States)

    Hickman, Simon J

    2016-03-01

    Internet video sharing sites allow the free dissemination of educational material. This study investigated the quality and educational content of videos of eye movement disorders posted on such sites. Educational neurological eye movement videos were identified by entering the titles of the eye movement abnormality into the search boxes of the video sharing sites. Also, suggested links were followed from each video. The number of views, likes, and dislikes for each video were recorded. The videos were then rated for their picture and sound quality. Their educational value was assessed according to whether the video included a description of the eye movement abnormality, the anatomical location of the lesion (if appropriate), and the underlying diagnosis. Three hundred fifty-four of these videos were found on YouTube and Vimeo. There was a mean of 6,443 views per video (range, 1-195,957). One hundred nineteen (33.6%) had no form of commentary about the eye movement disorder shown apart from the title. Forty-seven (13.3%) contained errors in the title or in the text. Eighty (22.6%) had excellent educational value by describing the eye movement abnormality, the anatomical location of the lesion, and the underlying diagnosis. Of these, 30 also had good picture and sound quality. The videos with excellent educational value had a mean of 9.84 "likes" per video compared with 2.37 for those videos without a commentary (P educational value with good picture and sound quality had a mean of 10.23 "likes" per video (P = 0.004 vs videos with no commentary). There was no significant difference in the mean number of "dislikes" between those videos that had no commentary or which contained errors and those with excellent educational value. There are a large number of eye movement videos freely available on these sites; however, due to the lack of peer review, a significant number have poor educational value due to having no commentary or containing errors. The number of "likes

  14. Evaluation of Video Quality in Wireless Multimedia Sensor Networks

    National Research Council Canada - National Science Library

    Mustafa Shakir; Obaid Ur Rehman; Zeeshan Abbas; Abdullah Masood; Wajeeha Shahid

    2016-01-01

    .... Scenarios involving multimedia transmissions with characteristics of video quality control and evaluation must be computed on the basis of Quality of Experience which relies on user's perception...

  15. Electronic evaluation for video commercials by impression index.

    Science.gov (United States)

    Kong, Wanzeng; Zhao, Xinxin; Hu, Sanqing; Vecchiato, Giovanni; Babiloni, Fabio

    2013-12-01

    How to evaluate the effect of commercials is significantly important in neuromarketing. In this paper, we proposed an electronic way to evaluate the influence of video commercials on consumers by impression index. The impression index combines both the memorization and attention index during consumers observing video commercials by tracking the EEG activity. It extracts features from scalp EEG to evaluate the effectiveness of video commercials in terms of time-frequency-space domain. And, the general global field power was used as an impression index for evaluation of video commercial scenes as time series. Results of experiment demonstrate that the proposed approach is able to track variations of the cerebral activity related to cognitive task such as observing video commercials, and help to judge whether the scene in video commercials is impressive or not by EEG signals.

  16. Students’ Perception on Teaching Practicum Evaluation using Video Technology

    Science.gov (United States)

    Chee Sern, Lai; ‘Ain Helan Nor, Nurul; Foong, Lee Ming; Hassan, Razali

    2017-08-01

    Video technology has been widely used in education especially in teaching and learning. However, the use of video technology for evaluation purpose especially in teaching practicum is extremely scarce and the benefits of video technology in teaching practicum evaluation have not yet been fully discovered. For that reason, this quantitative research aimed at identifying the perceptions of trainee teachers towards teaching practicum evaluation via video technology. A total of 260 students of Teacher Certification Programme (Program Pensiswazahan Guru - PPG) from the Faculty of Technical and Vocational Education (FPTV) of Universiti Tun Hussein Onn Malaysia (UTHM) had been randomly selected as respondents. A set of questionnaire was developed to assess the suitability, effectiveness and satisfaction of using video technology for teaching practicum. Conclusively, this research showed that the trainee teachers have positive perceptions in all three aspects related teaching practicum evaluation using video technology. Apart from that, no significant racial difference was found in the measured aspects. In addition, the trainee teachers also showed an understanding of the vast importance of teaching practicum evaluation via video. These research findings suggest that video technology can be a feasible and practical means of teaching practicum evaluation especially for distance learning program.

  17. Creation and erasure: music video as a signaletic form of practice

    Directory of Open Access Journals (Sweden)

    Mathias Bonde Korsgaard

    2012-06-01

    Full Text Available This article addresses the affective potentials of music video, identifying music video as a “signaletic form of practice.” Following Steven Shaviro's notion of (post- cinematic affect, the article demonstrates how cinematic affect is most clearly revealed when the images are released from traditional filmic vision—as shown in an analysis of the music video for OK Go's “WTF?” The article thereby also points towards the central role played by audiovisual modulation in conveying affect in music videos. It is shown how the site of such modulation is frequently that of the human body and how that, in some music videos, the human body is treated as an electronically or digitally coded signal rather than as a visual transcription or representation. As such, music video situates itself as an integral part of a new audiovisual regime of signaletic affect.

  18. Evaluating Best Practices for Video Tutorials: A Case Study

    Science.gov (United States)

    Weeks, Thomas; Putnam Davis, Jennifer

    2017-01-01

    This article will explore one library's experience creating best practices for the creation of video tutorials. First, a literature review establishes the best practices other creators have used. Then, the authors apply these best practices to the creation of their first video tutorial. Finally, they evaluate the usefulness of each practice in…

  19. Video streaming: implementation and evaluation in an undergraduate nursing program.

    Science.gov (United States)

    Bennett, Paul N; Glover, Pauline

    2008-02-01

    Video streaming technology enables video content, held on the web sites, to be streamed via the web. We report the implementation and evaluation of video streaming in an undergraduate nursing program in a metropolitan university in Australia. Students (n=703) were emailed a survey with a 15% response rate. We found that 91% (n=74) of respondents stated that video streaming assisted their learning. Forty-six percent(n=50) of students had difficulty accessing video streaming (particularly at the beginning of the study period). Over a 97-day period there were 8440 "hits" to the site from 1039 different internet protocol (IP) addresses. There were 4475 video streaming sessions undertaken by users. Video streaming was used for reviewing previously attended lectures (52%, n=56), examination preparation (34%, n=37), viewing missed lectures (27%, n=29) and class preparation (9%, n=10). Our experience with the introduction of video streaming has met with general enthusiasm from both students and teaching staff. Video streaming has particular relevance for rural students.

  20. Trailers in between short video forms from digital games to movies and back

    OpenAIRE

    Gandolfi, Enrico; Semprebene, Roberto

    2017-01-01

    Promotional trailers represent a significant trend in most entertainment sectors. However, little efforts have been done in enlightening this expressive form when related to video games. This article aims to address such a lack by analyzing game/movie (inspired by digital games) trailers as a crossroad between digital entertainment and films. The main intent is to exploit a comparative lens to uncover leading traits of short videos according to the medium that that they are portraying. Theref...

  1. Video Lottery is the Most Harmful Form of Gambling in Canada.

    Science.gov (United States)

    MacLaren, Vance Victor

    2016-06-01

    This paper summarizes the degree to which different forms of legal gambling contribute to Problem and Pathological Gambling (PPG) in Canada. Legal gambling activities were compared using meta-analysis of publicly available data concerning Canada's legal gambling industry. The majority of revenues in the decade spanning 2002-2012 were drawn from Video Lottery Terminals and casino slot machines. Population surveys indicated that three quarters of Canadians reported some form of past-year gambling participation, but most did not play Electronic Gambling Machines. Annual revenues divided by estimated numbers of participants in various gambling activities showed that Video Lottery players spent more money on average than did participants in other forms of gambling. The relative risk of PPG was higher among Video Lottery players than it was for other common forms of gambling. Results from a community study of frequent Video Lottery players showed that the risk of frequent players reporting symptoms of PPG was elevated if they reported playing weekly, spending $50 or more per session, or playing for more than an hour per session. These studies provide converging evidence that Video Lottery is more hazardous to consumers than other forms of gambling that are commonly practised in Canada.

  2. How to evaluate objective video quality metrics reliably

    DEFF Research Database (Denmark)

    Korhonen, Jari; Burini, Nino; You, Junyong

    2012-01-01

    The typical procedure for evaluating the performance of different objective quality metrics and indices involves comparisons between subjective quality ratings and the quality indices obtained using the objective metrics in question on the known video sequences. Several correlation indicators can...... as processing of subjective data. We also suggest some general guidelines for researchers to make comparison studies of objective video quality metrics more reliable and useful for the practitioners in the field....

  3. Compression evaluation of surgery video recordings retaining diagnostic credibility (compression evaluation of surgery video)

    Science.gov (United States)

    Duplaga, M.; Leszczuk, M. I.; Papir, Z.; Przelaskowski, A.

    2008-12-01

    Wider dissemination of medical digital video libraries is affected by two correlated factors, resource effective content compression that directly influences its diagnostic credibility. It has been proved that it is possible to meet these contradictory requirements halfway for long-lasting and low motion surgery recordings at compression ratios close to 100 (bronchoscopic procedures were a case study investigated). As the main supporting assumption, it has been accepted that the content can be compressed as far as clinicians are not able to sense a loss of video diagnostic fidelity (a visually lossless compression). Different market codecs were inspected by means of the combined subjective and objective tests toward their usability in medical video libraries. Subjective tests involved a panel of clinicians who had to classify compressed bronchoscopic video content according to its quality under the bubble sort algorithm. For objective tests, two metrics (hybrid vector measure and hosaka Plots) were calculated frame by frame and averaged over a whole sequence.

  4. Evaluation of the Effectiveness of Video Assisted Teaching (VAT) on ...

    African Journals Online (AJOL)

    Background and Aim. The aim of this study was to evaluate the effectiveness of Video Assisted Teaching (VAT) on the knowledge and practice of dental hygiene among primary school children in Bangalore, India. The hypothesis to be tested was that the mean post-test knowledge and practice scores of primary school ...

  5. Abstract: Evaluation of the Effectiveness of Video Assisted Teaching ...

    African Journals Online (AJOL)

    Background and Aim The aim of this study was to evaluate the effectiveness of Video Assisted Teaching (VAT) on the knowledge and practice of dental hygiene among primary school children in Bangalore, India. The hypothesis to be tested was that the mean post-test knowledge and practice scores of primary school ...

  6. Initial laboratory evaluation of color video cameras: Phase 2

    Energy Technology Data Exchange (ETDEWEB)

    Terry, P.L.

    1993-07-01

    Sandia National Laboratories has considerable experience with monochrome video cameras used in alarm assessment video systems. Most of these systems, used for perimeter protection, were designed to classify rather than to identify intruders. The monochrome cameras were selected over color cameras because they have greater sensitivity and resolution. There is a growing interest in the identification function of security video systems for both access control and insider protection. Because color camera technology is rapidly changing and because color information is useful for identification purposes, Sandia National Laboratories has established an on-going program to evaluate the newest color solid-state cameras. Phase One of the Sandia program resulted in the SAND91-2579/1 report titled: Initial Laboratory Evaluation of Color Video Cameras. The report briefly discusses imager chips, color cameras, and monitors, describes the camera selection, details traditional test parameters and procedures, and gives the results reached by evaluating 12 cameras. Here, in Phase Two of the report, we tested 6 additional cameras using traditional methods. In addition, all 18 cameras were tested by newly developed methods. This Phase 2 report details those newly developed test parameters and procedures, and evaluates the results.

  7. Evaluating Existing Strategies to Limit Video Game Playing Time.

    Science.gov (United States)

    Davies, Bryan; Blake, Edwin

    2016-01-01

    Public concern surrounding the effects video games have on players has inspired a large body of research, and policy makers in China and South Korea have even mandated systems that limit the amount of time players spend in game. The authors present an experiment that evaluates the effectiveness of such policies. They show that forcibly removing players from the game environment causes distress, potentially removing some of the benefits that games provide and producing a desire for more game time. They also show that, with an understanding of player psychology, playtime can be manipulated without significantly changing the user experience or negating the positive effects of video games.

  8. Technical Evaluation Report 13: Online Video Conferencing Products

    Directory of Open Access Journals (Sweden)

    Pam Craven

    2002-10-01

    Full Text Available This is the first in Athabasca University’s series of evaluation reports to feature online Webcam and videoconferencing products. While Webcam software generates a simple visual presentation from a live online camera, videoconferencing products contain a wider range of interactive features serving multi-point interactions between participants. In many online situations, the addition of video images to a live presentation can add substantially to its educational effectiveness. Ten products/ online services are reviewed, supporting a wide range of video-based activities.

  9. Medical students¿ assessment of pediatric patients - teaching and evaluation using video cases

    DEFF Research Database (Denmark)

    Malon, Michelle; Cortes, Dina; Greisen, Gorm

    2014-01-01

    BackgroundWe introduced video-based teaching in pediatrics. We evaluated the impact of a pediatric video program on student performance in assessing pediatric patients presented as video cases. The program consisted of a library of pediatric videos, and inclusion of these in the teaching...

  10. An Evaluation of an Educational Video Game on Mathematics Achievement in First Grade Students

    National Research Council Canada - National Science Library

    Kimberly Hieftje; Tyra Pendergrass; Tassos C Kyriakides; Walter Gilliam; Lynn Fiellin

    2017-01-01

    .... Educational video games have been shown to promote academic achievement; however, few rigorous studies have evaluated the use of educational video games in supporting math development, especially in early primary education...

  11. Mobile based optical form evaluation system

    Directory of Open Access Journals (Sweden)

    Asım Sinan YÜKSEL

    2016-05-01

    Full Text Available Optical forms that contain multiple-choice answers are widely used both for electing students and evaluating student achievements in education systems in our country and worldwide. Optical forms are evaluated by employing optical mark recognition techniques through optical readers. High cost of these machines, limited access to them, long waiting time for evaluation results make the process hard for educationists working in cities or countries. In this study, a mobile application was developed for the educationists who own mobile phones or tablets for the purpose of evaluating students' answer sheets quickly and independent of location and optical readers. Optical form recognition, reading and evaluation processes are done on the image of student's answer sheet that is taken with the mobile phone or tablet of educationist. The Android based mobile application that we developed has a user-friendly interface, high success rate and is the first of our knowledge application that operates on mobile platforms in this field.

  12. Evaluating Acquisition of Knowledge about Infertility Using a Whiteboard Video.

    Science.gov (United States)

    Thomson, Ashley A; Brown, Meghan; Zhang, Shannon; Stern, Emily; Hahn, Philip M; Reid, Robert L

    2016-07-01

    Myths about fertility are commonplace in society. Few studies have investigated educational approaches to bridge gaps in knowledge among consumers. We evaluated the effectiveness of an animated, 15-minute whiteboard video to effect change in knowledge about infertility. We recruited medical students in their first or second year of training for participation. The students completed the study before their formal lectures on infertility issues. Participants completed questionnaires assessing infertility knowledge immediately before and one week after watching the educational video. Before and after scores (maximum = 50 points) were compared using paired t tests. The study cohort included 101 medical students; 69% (70/101) were female and 31% (31/101) were male. Overall, students increased their score by 4.0/50 (95% CI 3.2 to 4.8, P knowledge of basic reproductive biology, infertility risk factors, treatments, and common myths associated with infertility. Copyright © 2016 The Society of Obstetricians and Gynaecologists of Canada/La Société des obstétriciens et gynécologues du Canada. Published by Elsevier Inc. All rights reserved.

  13. Consumer-based technology for distribution of surgical videos for objective evaluation.

    Science.gov (United States)

    Gonzalez, Ray; Martinez, Jose M; Lo Menzo, Emanuele; Iglesias, Alberto R; Ro, Charles Y; Madan, Atul K

    2012-08-01

    The Global Operative Assessment of Laparoscopic Skill (GOALS) is one validated metric utilized to grade laparoscopic skills and has been utilized to score recorded operative videos. To facilitate easier viewing of these recorded videos, we are developing novel techniques to enable surgeons to view these videos. The objective of this study is to determine the feasibility of utilizing widespread current consumer-based technology to assist in distributing appropriate videos for objective evaluation. Videos from residents were recorded via a direct connection from the camera processor via an S-video output via a cable into a hub to connect to a standard laptop computer via a universal serial bus (USB) port. A standard consumer-based video editing program was utilized to capture the video and record in appropriate format. We utilized mp4 format, and depending on the size of the file, the videos were scaled down (compressed), their format changed (using a standard video editing program), or sliced into multiple videos. Standard available consumer-based programs were utilized to convert the video into a more appropriate format for handheld personal digital assistants. In addition, the videos were uploaded to a social networking website and video sharing websites. Recorded cases of laparoscopic cholecystectomy in a porcine model were utilized. Compression was required for all formats. All formats were accessed from home computers, work computers, and iPhones without difficulty. Qualitative analyses by four surgeons demonstrated appropriate quality to grade for these formats. Our preliminary results show promise that, utilizing consumer-based technology, videos can be easily distributed to surgeons to grade via GOALS via various methods. Easy accessibility may help make evaluation of resident videos less complicated and cumbersome.

  14. A data set for evaluating the performance of multi-class multi-object video tracking

    OpenAIRE

    Chakraborty, Avishek; Stamatescu, Victor; Wong, Sebastien C.; Wigley, Grant; Kearney, David

    2017-01-01

    One of the challenges in evaluating multi-object video detection, tracking and classification systems is having publically available data sets with which to compare different systems. However, the measures of performance for tracking and classification are different. Data sets that are suitable for evaluating tracking systems may not be appropriate for classification. Tracking video data sets typically only have ground truth track IDs, while classification video data sets only have ground tru...

  15. Video dosimetry: evaluation of X-radiation dose by video fluoroscopic image; Videodosimetria: avaliacao da dose da radiacao X atraves da imagem videofluroscopica

    Energy Technology Data Exchange (ETDEWEB)

    Nova, Joao Luiz Leocadio da [Universidade Federal, Rio de Janeiro, RJ (Brazil). Centro de Ciencias da Saude. Nucleo de Tecnologia Educacional para a Saude; Lopes, Ricardo Tadeu [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia. Lab. de Instrumentacao Nuclear

    1996-12-31

    A new methodology to evaluate the entrance surface dose on patients under radiodiagnosis is presented. A phantom is used in video fluoroscopic procedures in on line video signal system. The images are obtained from a Siemens Polymat 50 and are digitalized. The results show that the entrance surface dose can be obtained in real time from video imaging 3 refs., 2 figs., 2 tabs.

  16. Offset Trace-Based Video Quality Evaluation Network Transport

    DEFF Research Database (Denmark)

    Seeling, P.; Reisslein, M.; Fitzek, Frank

    2006-01-01

    Video traces contain information about encoded video frames, such as frame sizes and qualities, and provide a convenient method to conduct multimedia networking research. Although wiedely used in networking research, these traces do not allow to determine the video qaulityin an accurate manner...... after networking transport that includes losses and delays. In this work, we provide (i) an overview of frame dependencies that have to be taken into consideration when working with video traces, (ii) an algorithmic approach to combine traditional video traces and offset distortion traces to determine...... the video quality or distortion after lossy network transport, (iii) offset distortion and quality characteristics and (iv) the offset distortion trace format and tools to create offset distortion traces....

  17. An Evaluation of the Efficacy of Video Displays for Use With Chimpanzees (Pan troglodytes)

    OpenAIRE

    Lydia M. Hopper; Lambeth, Susan P; Schapiro, Steven J.

    2012-01-01

    Video displays for behavioral research lend themselves particularly well to studies with chimpanzees (Pan troglodytes), as their vision is comparable to humans’, yet there has been no formal test of the efficacy of video displays as a form of social information for chimpanzees. To address this, we compared the learning success of chimpanzees shown video footage of a conspecific compared to chimpanzees shown a live conspecific performing the same novel task. Footage of an unfamiliar chimpanzee...

  18. Mixed low-level waste form evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Pohl, P.I.; Cheng, Wu-Ching; Wheeler, T.; Waters, R.D.

    1997-03-01

    A scoping level evaluation of polyethylene encapsulation and vitreous waste forms for safe storage of mixed low-level waste was performed. Maximum permissible radionuclide concentrations were estimated for 15 indicator radionuclides disposed of at the Hanford and Savannah River sites with respect to protection of the groundwater and inadvertent intruder pathways. Nominal performance improvements of polyethylene and glass waste forms relative to grout are reported. These improvements in maximum permissible radionuclide concentrations depend strongly on the radionuclide of concern and pathway. Recommendations for future research include improving the current understanding of the performance of polymer waste forms, particularly macroencapsulation. To provide context to these estimates, the concentrations of radionuclides in treated DOE waste should be compared with the results of this study to determine required performance.

  19. Filtering Video Noise as Audio with Motion Detection to Form a Musical Instrument

    OpenAIRE

    Thomé, Carl

    2016-01-01

    Even though they differ in the physical domain, digital video and audio share many characteristics. Both are temporal data streams often stored in buffers with 8-bit values. This paper investigates a method for creating harmonic sounds with a video signal as input. A musical instrument is proposed, that utilizes video in both a sound synthesis method, and in a controller interface for selecting musical notes at specific velocities. The resulting instrument was informally determined by the aut...

  20. Classification of dual language audio-visual content: Introduction to the VideoCLEF 2008 pilot benchmark evaluation task

    NARCIS (Netherlands)

    Larson, M.; Newman, E.; Jones, G.J.F.; Köhler, J.; Larson, M.; de Jong, F.M.G.; Kraaij, W.; Ordelman, R.J.F.

    2008-01-01

    VideoCLEF is a new track for the CLEF 2008 campaign. This track aims to develop and evaluate tasks in analyzing multilingual video content. A pilot of a Vid2RSS task involving assigning thematic class labels to video kicks off the VideoCLEF track in 2008. Task participants deliver classification

  1. What does video-camera framing say during the news? A look at contemporary forms of visual journalism

    Directory of Open Access Journals (Sweden)

    Juliana Freire Gutmann

    2012-12-01

    Full Text Available In order to contribute to the discussion about audiovisual processing of journalistic information, this article examines connections between the uses of video framing on the television news stage, contemporary senses, public interest and the distinction values of journalism, addressed here through the perspective of the concepts of conversation and participation. The article identifies recurring video framing techniques used by 15 Brazilian television newscasts, accounting for contemporary forms of audiovisual telejournalism, responsible for new types of spatial-temporal configurations. From a methodological perspective, this article seeks to contribute to the study of the television genre by understanding the uses of these audiovisual techniques as a strategy for newscast communicability.

  2. WHAT DOES VIDEO-CAMERA FRAMING SAY DURING THE NEWS? A LOOK AT CONTEMPORARY FORMS OF VISUAL JOURNALISM

    Directory of Open Access Journals (Sweden)

    Juliana Freire Gutmann

    2013-06-01

    Full Text Available In order to contribute to the discussion about audiovisual processing of journalistic information, this article examines connections between the uses of video framing on the television news stage, contemporary senses, public interest and the distinction values of journalism, addressed here through the perspective of the concepts of conversation and participation. The article identifies recurring video framing techniques used by 15 Brazilian television newscasts, accounting for contemporary forms of audiovisual telejournalism, responsible for new types of spatial-temporal configurations. From a methodological perspective, this article seeks to contribute to the study of the television genre by understanding the uses of these audiovisual techniques as a strategy for newscast communicability.

  3. Gaze inspired subtitle position evaluation for MOOCs videos

    Science.gov (United States)

    Chen, Hongli; Yan, Mengzhen; Liu, Sijiang; Jiang, Bo

    2017-06-01

    Online educational resources, such as MOOCs, is becoming increasingly popular, especially in higher education field. One most important media type for MOOCs is course video. Besides traditional bottom-position subtitle accompany to the videos, in recent years, researchers try to develop more advanced algorithms to generate speaker-following style subtitles. However, the effectiveness of such subtitle is still unclear. In this paper, we investigate the relationship between subtitle position and the learning effect after watching the video on tablet devices. Inspired with image based human eye tracking technique, this work combines the objective gaze estimation statistics with subjective user study to achieve a convincing conclusion - speaker-following subtitles are more suitable for online educational videos.

  4. Prevalence of video games among Thai children: impact evaluation.

    Science.gov (United States)

    Jirasatmathakul, P; Poovorawan, Y

    2000-12-01

    The present study was performed in order to determine prevalence and favored types of video games among altogether 679 primary and secondary school children in Thailand. To that end, the authors distributed questionnaires comprising detailed questions as to demographic data, playing frequency, available location and preferred type of video games among the parents of the children and adolescents to be investigated. Consistent with the literature, our results showed an early onset of video game playing (7.6 years), a higher prevalence among boys compared with girls, and a predilection for games invoking some aggressive behavior. In conclusion, although health hazards created by video game playing have remained beyond proof we still recommend parents and teachers to play a more active part as to the choice of games and the time spent playing.

  5. Evaluation of Different Features for Face Recognition in Video

    Science.gov (United States)

    2014-09-01

    15 4 Graph presents the performance comparison among different algorithms implemented in OpenCV (Fisherfaces, Eigenfaces and LBPH)- all use...for face recog- nition in video, in particular those available in the OpenCV library [13]. Comparative performance analysis of these algorithms is...videos. The first one used a generic class that exists in OpenCV (version 2.4.1), called FeatureDetector, which allowed the automatic extraction of

  6. Perceptual evaluation of visual alerts in surveillance videos

    Science.gov (United States)

    Rogowitz, Bernice E.; Topkara, Mercan; Pfeiffer, William; Hampapur, Arun

    2015-03-01

    Visual alerts are commonly used in video monitoring and surveillance systems to mark events, presumably making them more salient to human observers. Surprisingly, the effectiveness of computer-generated alerts in improving human performance has not been widely studied. To address this gap, we have developed a tool for simulating different alert parameters in a realistic visual monitoring situation, and have measured human detection performance under conditions that emulated different set-points in a surveillance algorithm. In the High-Sensitivity condition, the simulated alerts identified 100% of the events with many false alarms. In the Lower-Sensitivity condition, the simulated alerts correctly identified 70% of the targets, with fewer false alarms. In the control condition, no simulated alerts were provided. To explore the effects of learning, subjects performed these tasks in three sessions, on separate days, in a counterbalanced, within subject design. We explore these results within the context of cognitive models of human attention and learning. We found that human observers were more likely to respond to events when marked by a visual alert. Learning played a major role in the two alert conditions. In the first session, observers generated almost twice as many False Alarms as in the No-Alert condition, as the observers responded pre-attentively to the computer-generated false alarms. However, this rate dropped equally dramatically in later sessions, as observers learned to discount the false cues. Highest observer Precision, Hits/(Hits + False Alarms), was achieved in the High Sensitivity condition, but only after training. The successful evaluation of surveillance systems depends on understanding human attention and performance.

  7. EUS needle identification comparison and evaluation (NICE) study (with videos)

    Science.gov (United States)

    Tang, Shou-jiang; Vilmann, Andreas S.; Saftoiu, Adrian; Wang, Wanmei; Streba, Costin; Fink, Peter P.; Griswold, Michael; Wu, Ruonan; Dietrich, Christoph F.; Jenssen, Christian; Hocke, Michael; Kantowski, Marcus; Pohl, Jürgen; Fockens, Paul; Annema, Jouke T.; van der Heijden, Erik H.F.M.; Havre, Roald Flesland; Pham, Khanh Do-Cong; Kunda, Rastislav; Deprez, Pierre H.; Mariana, Jinga; Vazquez-Sequeiros, Enrique; Larghi, Alberto; Buscarini, Elisabetta; Fusaroli, Pietro; Lahav, Maor; Puri, Rajesh; Garg, Pramod Kumar; Sharma, Malay; Maluf-Filho, Fauze; Sahai, Anand; Brugge, William R.; Lee, Linda S.; Aslanian, Harry R.; Wang, Andrew Y.; Shami, Vanessa M.; Markowitz, Arnold; Siddiqui, Ali A.; Mishra, Girish; Scheiman, James M.; Isenberg, Gerard; Siddiqui, Uzma D.; Shah, Raj J.; Buxbaum, James; Watson, Rabindra R.; Willingham, Field F.; Bhutani, Manoop S.; Levy, Michael J.; Harris, Cynthia; Wallace, Michael B.; Nolsøe, Christian Pállson; Lorentzen, Torben; Bang, Niels; Sørensen, Sten Mellerup; Gilja, Odd Helge; D’Onofrio, Mirko; Piscaglia, Fabio; Gritzmann, Norbert; Radzina, Maija; Sparchez, Zeno Adrian; Sidhu, Paul S.; Freeman, Simon; McCowan, Timothy C.; de Araujo, Cyrillo Rodrigues; Patel, Akash; del Ali, Mohammad A; Campbell, Garth; Chen, Edward; Vilmann, Peter

    2017-01-01

    Background and Aims Endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) or biopsy is widely practiced. Optimal sonographic visualization of the needle is critical for image guided interventions. There are several commercially available needles but no bench-top testing and direct comparison of these needles to reveal their inherent echogenicity. The aims are to provide bench-top data that can be used to guide clinical applications and to promote future device research and development. Methods Descriptive bench-top testing and comparison. Bench-top testing of 8 commonly used EUS-FNA needles (all of 22 gauge in size): SonoTip Pro Control (Medi-Globe); Expect Slimline (Boston Scientific); EchoTip, EchoTip Ultra, EchoTip ProCore High Definition, (Cook Medical); ClearView (Conmed); EZ Shot2 (Olympus); BNX (Beacon Endoscopic); and 2 new prototype needles that are coated by echogenic polymers by Medi-Globe. Blinded evaluation of standardized and unedited videos by 43 EUS endoscopists and 17 radiologists specialized in gastrointestinal ultrasound examination that is unfamiliar with EUS needle devices. Results There was no significant difference in the ratings and rankings of these needles between endosonographers and radiologists. Overall, one prototype needle was rated as the best, ranking 10% to 40% higher than all other needles (p<0.01). Among the commercially available needles, the EchoTip Ultra needle and the ClearView needle were top choices. The EZ Shot 2 needle was ranked statistically lower than other needles (30%–75% worse, p<0.001). Conclusions All FNA needles have their inherent and different echogenicity, and these differences are similarly recognized by EUS endoscopists and radiologists. Needles with polymeric coating from the entire shaft to the needle tip may offer better echogenicity. PMID:26873530

  8. Evaluation of control strategies in forming processes

    Directory of Open Access Journals (Sweden)

    Calmano Stefan

    2015-01-01

    Full Text Available Products of forming processes are subject to quality fluctuations due to uncertainty in semi-finished part properties as well as process conditions and environment. An approach to cope with these uncertainties is the implementation of a closed-loop control taking into account the actual product properties measured by sensors or estimated by a mathematical process model. Both methods of uncertainty control trade off with a financial effort. In case of sensor integration the effort is the cost of the sensor including signal processing as well as the design and manufacturing effort for integration. In case of an estimation model the effort is mainly determined by the time and knowledge needed to derive the model, identify the parameters and implement the model into the PLC. The risk of mismatch between model and reality as well as the risk of wrong parameter identification can be assumed as additional uncertainty (model uncertainty. This paper evaluates controlled and additional uncertainty by taking into account process boundary conditions like the degree of fluctuations in semi-finished part properties. The proposed evaluation is demonstrated by the analysis of exemplary processes.

  9. Evaluating a bilingual video to improve infant feeding knowledge and behavior among immigrant Latina mothers.

    Science.gov (United States)

    Scheinmann, Roberta; Chiasson, Mary Ann; Hartel, Diana; Rosenberg, Terry J

    2010-10-01

    Childhood obesity is recognized as a major health problem in the United States and is occurring at ever younger ages. While most prevention efforts are aimed at school-age children, this project focuses on the caregivers of children from 0 to 24 months of age. This study is an evaluation of an educational English/Spanish infant feeding video, distributed for home viewing at one New York City Special Supplemental Food Program for Women, Infants and Children (WIC) center (video group) but not at three others (comparison group). Baseline, 3 and 6 month infant feeding knowledge and behavior surveys were conducted. For this report, analyses are restricted to Latina immigrant mothers. The video and comparison group mothers were similar in age, education, and parity. The video group was more likely to speak Spanish at home, and had lower knowledge scores at baseline. At the 6 month follow-up, knowledge increased for both groups, but the video group showed a greater increase in knowledge between baseline and 6 months: in ordered logistic regression analyses the video group had a 1.7 times greater score increase at each outcome level. The video group also showed positive changes in behavior-later age at first solid feeding was observed in the video group. We found that an inexpensive, low-intensity video intervention can positively impact maternal knowledge and behavior related to infant feeding among immigrant Latinas. Attention should be given to intervening early with high-risk populations.

  10. 360° Operative Videos: A Randomised Cross-Over Study Evaluating Attentiveness and Information Retention.

    Science.gov (United States)

    Harrington, Cuan M; Kavanagh, Dara O; Wright Ballester, Gemma; Wright Ballester, Athena; Dicker, Patrick; Traynor, Oscar; Hill, Arnold; Tierney, Sean

    2017-11-06

    Although two-dimensional (2D) and three-dimensional videos have traditionally provided foundations for reviewing operative procedures, the recent 360º format may provide new dimensions to surgical education. This study sought to describe the production of a high quality 360º video for an index-operation (augmented with educational material), while evaluating for variances in attentiveness, information retention, and appraisal compared to 2D. A 6-camera synchronised array (GoPro Omni, [California, United States]) was suspended inverted and recorded an elective laparoscopic cholecystectomy in 2016. A single-blinded randomised cross-over study was performed to evaluate this video in 360º vs 2D formats. Group A experienced the 360º video using Samsung (Suwon, South-Korea) GearVR virtual-reality headsets, followed by the 2D experience on a 75-inch television. Group B were reversed. Each video was probed at designated time points for engagement levels and task-unrelated images or thoughts. Alternating question banks were administered following each video experience. Feedback was obtained via a short survey at study completion. The New Academic and Education Building (NAEB) in Dublin, Royal College of Surgeons in Ireland, July 2017. Preclinical undergraduate students from a medical university in Ireland. Forty students participated with a mean age of 23.2 ± 4.5 years and equal sex involvement. The 360º video demonstrated significantly higher engagement (p video as their learning platform of choice. Mean appraisal levels for the 360º platform were positive with mean responses of >8/10 for the platform for learning, immersion, and entertainment. This study describes the successful development and evaluation of a 360º operative video. This new video format demonstrated significant engagement and attentiveness benefits compared to traditional 2D formats. This requires further evaluation in the field of technology enhanced learning. Copyright © 2017 Association of

  11. Video Analytics Evaluation: Survey of Datasets, Performance Metrics and Approaches

    Science.gov (United States)

    2014-09-01

    events are birthday party, parade, dog show, etc. multimedia event recounting: given an event description and some examples, review a video clip containing...trajectories. 6.10 Tianjin University of Technology team Tianjin University of Technology has modeled human behaviour with the philosophy of bag of

  12. Design, Development and Evaluation of a Field Learning Video Blog

    Science.gov (United States)

    Petrovic, Otto

    2016-01-01

    The research question in this paper is how a Field Learning Video Blog (FLvlog) has to be designed in order to optimize learning processes taking into account changed everyday communication habits of students. The system is designed to meet pedagogical as well as functional requirements for learning in fieldwork settings. The main difference to…

  13. Subjective evaluation of H.265/HEVC based dynamic adaptive video streaming over HTTP (HEVC-DASH)

    Science.gov (United States)

    Irondi, Iheanyi; Wang, Qi; Grecos, Christos

    2015-02-01

    The Dynamic Adaptive Streaming over HTTP (DASH) standard is becoming increasingly popular for real-time adaptive HTTP streaming of internet video in response to unstable network conditions. Integration of DASH streaming techniques with the new H.265/HEVC video coding standard is a promising area of research. The performance of HEVC-DASH systems has been previously evaluated by a few researchers using objective metrics, however subjective evaluation would provide a better measure of the user's Quality of Experience (QoE) and overall performance of the system. This paper presents a subjective evaluation of an HEVC-DASH system implemented in a hardware testbed. Previous studies in this area have focused on using the current H.264/AVC (Advanced Video Coding) or H.264/SVC (Scalable Video Coding) codecs and moreover, there has been no established standard test procedure for the subjective evaluation of DASH adaptive streaming. In this paper, we define a test plan for HEVC-DASH with a carefully justified data set employing longer video sequences that would be sufficient to demonstrate the bitrate switching operations in response to various network condition patterns. We evaluate the end user's real-time QoE online by investigating the perceived impact of delay, different packet loss rates, fluctuating bandwidth, and the perceived quality of using different DASH video stream segment sizes on a video streaming session using different video sequences. The Mean Opinion Score (MOS) results give an insight into the performance of the system and expectation of the users. The results from this study show the impact of different network impairments and different video segments on users' QoE and further analysis and study may help in optimizing system performance.

  14. Evaluation of intrusion sensors and video assessment in areas of restricted passage

    Energy Technology Data Exchange (ETDEWEB)

    Hoover, C.E.; Ringler, C.E.

    1996-04-01

    This report discusses an evaluation of intrusion sensors and video assessment in areas of restricted passage. The discussion focuses on applications of sensors and video assessment in suspended ceilings and air ducts. It also includes current and proposed requirements for intrusion detection and assessment. Detection and nuisance alarm characteristics of selected sensors as well as assessment capabilities of low-cost board cameras were included in the evaluation.

  15. Performance Evaluation and Parameter Optimization of SoftCast Wireless Video Broadcast

    Directory of Open Access Journals (Sweden)

    Dongxue Yang

    2015-08-01

    Full Text Available Wireless video broadcast plays an imp ortant role in multimedia communication with the emergence of mobile video applications. However, conventional video broadcast designs suffer from a cliff effect due to separated source and channel encoding. The newly prop osed SoftCast scheme employs a cross-layer design, whose reconstructed video quality is prop ortional to the channel condition. In this pap er, we provide the p erformance evaluation and the parameter optimization of the SoftCast system. Optimization principles on parameter selection are suggested to obtain a b etter video quality, o ccupy less bandwidth and/or utilize lower complexity. In addition, we compare SoftCast with H.264 in the LTE EPA scenario. The simulation results show that SoftCast provides a b etter p erformance in the scalability to channel conditions and the robustness to packet losses.

  16. Parents' Views of Video Games: Habitus Forms in the Context of Parental Mediation

    Science.gov (United States)

    Friedrichs, Henrike; von Gross, Friederike; Herde, Katharina; Sander, Uwe

    2015-01-01

    This research project was conducted to explore parental attitudes towards and their mediation of video games. Qualitative, semi-structured interviews with 28 parents (14 couples) assessed their media-related habitus, their media-educational habitus and the interaction between the habitus. The results show that the media-related habitus has a…

  17. Do Visual Aids Really Matter? A Comparison of Student Evaluations before and after Embedding Visuals into Video Lectures

    Science.gov (United States)

    Fish, Kristine; Mun, Jungwon; A'Jontue, RoseAnn

    2016-01-01

    Educational webcasts or video lectures as a teaching tool and a form of visual aid have become widely used with the rising prevalence of online and blended courses and with the increase of web-based video materials. Thus, research pertaining to factors enhancing the effectiveness of video lectures, such as number of visual aids, is critical. This…

  18. Morphofunctional evaluation of end-to-side neurorrhaphy through video system magnification.

    Science.gov (United States)

    de Barros, Rui Sergio Monteiro; Brito, Marcus Vinicius Henriques; de Brito, Marcelo Houat; de Aguiar Lédo Coutinho, Jean Vitor; Teixeira, Renan Kleber Costa; Yamaki, Vitor Nagai; da Silva Costa, Felipe Lobato; Somensi, Danusa Neves

    2018-01-01

    The surgical microscope is an essential tool for microsurgery. Nonetheless, several promising alternatives are being developed, including endoscopes and laparoscopes with video systems. However, these alternatives have only been used for arterial anastomoses so far. The aim of this study was to evaluate the use of a low-cost video-assisted magnification system in end-to-side neurorrhaphy in rats. Forty rats were randomly divided into four matched groups: (1) normality (sciatic nerve was exposed but was kept intact); (2) denervation (fibular nerve was sectioned, and the proximal and distal stumps were sutured-transection without repair); (3) microscope; and (4) video system (fibular nerve was sectioned; the proximal stump was buried inside the adjacent musculature, and the distal stump was sutured to the tibial nerve). Microsurgical procedures were performed with guidance from a microscope or video system. We analyzed weight, nerve caliber, number of stitches, times required to perform the neurorrhaphy, muscle mass, peroneal functional indices, latency and amplitude, and numbers of axons. There were no significant differences in weight, nerve caliber, number of stitches, muscle mass, peroneal functional indices, or latency between microscope and video system groups. Neurorrhaphy took longer using the video system (P microscope group than in the video group. It is possible to perform an end-to-side neurorrhaphy in rats through video system magnification. The success rate is satisfactory and comparable with that of procedures performed under surgical microscopes. Copyright © 2017 Elsevier Inc. All rights reserved.

  19. Remote video radioactive systems evaluation, Savannah River Site

    Energy Technology Data Exchange (ETDEWEB)

    Heckendorn, F.M.; Robinson, C.W.

    1991-12-31

    Specialized miniature low cost video equipment has been effectively used in a number of remote, radioactive, and contaminated environments at the Savannah River Site (SRS). The equipment and related techniques have reduced the potential for personnel exposure to both radiation and physical hazards. The valuable process information thus provided would not have otherwise been available for use in improving the quality of operation at SRS.

  20. A Framework of Reference for Evaluating User Experience When Using High Definition Video to Video to Facilitate Public Services

    OpenAIRE

    Molnar, Andreea; Weerakkody, Vishanth; El-Haddadeh, Ramzi; Lee, Habin; Irani, Zahir

    2013-01-01

    Part 5: IT in the Public Sector; International audience; This paper proposes the use of high definition video to video as a means to facilitate the adoption of public services. High definition video can be delivered over the public Internet infrastructure by using a Right of Way platform that guarantees no interference from unwanted traffic. In this paper, we discuss the benefits of using high definition video to video communication in the public sector to facilitate services such as health, ...

  1. Measurement and protocol for evaluating video and still stabilization systems

    Science.gov (United States)

    Cormier, Etienne; Cao, Frédéric; Guichard, Frédéric; Viard, Clément

    2013-01-01

    This article presents a system and a protocol to characterize image stabilization systems both for still images and videos. It uses a six axes platform, three being used for camera rotation and three for camera positioning. The platform is programmable and can reproduce complex motions that have been typically recorded by a gyroscope mounted on different types of cameras in different use cases. The measurement uses a single chart for still image and videos, the texture dead leaves chart. Although the proposed implementation of the protocol uses a motion platform, the measurement itself does not rely on any specific hardware. For still images, a modulation transfer function is measured in different directions and is weighted by a contrast sensitivity function (simulating the human visual system accuracy) to obtain an acutance. The sharpness improvement due to the image stabilization system is a good measurement of performance as recommended by a CIPA standard draft. For video, four markers on the chart are detected with sub-pixel accuracy to determine a homographic deformation between the current frame and a reference position. This model describes well the apparent global motion as translations, but also rotations along the optical axis and distortion due to the electronic rolling shutter equipping most CMOS sensors. The protocol is applied to all types of cameras such as DSC, DSLR and smartphones.

  2. Keeping the Game Alive: Evaluating Strategies for the Preservation of Console Video Games

    Directory of Open Access Journals (Sweden)

    Mark Guttenbrunner

    2010-07-01

    Full Text Available Interactive fiction and video games are part of our cultural heritage. As original systems cease to work because of hardware and media failures, methods to preserve obsolete video games for future generations have to be developed. The public interest in early video games is high, as exhibitions, regular magazines on the topic and newspaper articles demonstrate. Moreover, games considered to be classic are rereleased for new generations of gaming hardware. However, with the rapid development of new computer systems, the way games look and are played changes constantly. When trying to preserve console video games one faces problems of classified development documentation, legal aspects and extracting the contents from original media like cartridges with special hardware. Furthermore, special controllers and non-digital items are used to extend the gaming experience making it difficult to preserve the look and feel of console video games.This paper discusses strategies for the digital preservation of console video games. After a short overview of console video game systems, there follows an introduction to digital preservation and related work in common strategies for digital preservation and preserving interactive art. Then different preservation strategies are described with a specific focus on emulation. Finally a case study on console video game preservation is shown which uses the Planets preservation planning approach for evaluating preservation strategies in a documented decision-making process. Experiments are carried out to compare different emulators as well as other approaches, first for a single console video game system, then for different console systems of the same era and finally for systems of all eras. Comparison and discussion of results show that, while emulation works very well in principle for early console video games, various problems exist for the general use as a digital preservation alternative. We show what future work

  3. Comparative Evaluation of Background Subtraction Algorithms in Remote Scene Videos Captured by MWIR Sensors

    Science.gov (United States)

    Yao, Guangle; Lei, Tao; Zhong, Jiandan; Jiang, Ping; Jia, Wenwu

    2017-01-01

    Background subtraction (BS) is one of the most commonly encountered tasks in video analysis and tracking systems. It distinguishes the foreground (moving objects) from the video sequences captured by static imaging sensors. Background subtraction in remote scene infrared (IR) video is important and common to lots of fields. This paper provides a Remote Scene IR Dataset captured by our designed medium-wave infrared (MWIR) sensor. Each video sequence in this dataset is identified with specific BS challenges and the pixel-wise ground truth of foreground (FG) for each frame is also provided. A series of experiments were conducted to evaluate BS algorithms on this proposed dataset. The overall performance of BS algorithms and the processor/memory requirements were compared. Proper evaluation metrics or criteria were employed to evaluate the capability of each BS algorithm to handle different kinds of BS challenges represented in this dataset. The results and conclusions in this paper provide valid references to develop new BS algorithm for remote scene IR video sequence, and some of them are not only limited to remote scene or IR video sequence but also generic for background subtraction. The Remote Scene IR dataset and the foreground masks detected by each evaluated BS algorithm are available online: https://github.com/JerryYaoGl/BSEvaluationRemoteSceneIR. PMID:28837112

  4. Comparative Evaluation of Background Subtraction Algorithms in Remote Scene Videos Captured by MWIR Sensors

    Directory of Open Access Journals (Sweden)

    Guangle Yao

    2017-08-01

    Full Text Available Background subtraction (BS is one of the most commonly encountered tasks in video analysis and tracking systems. It distinguishes the foreground (moving objects from the video sequences captured by static imaging sensors. Background subtraction in remote scene infrared (IR video is important and common to lots of fields. This paper provides a Remote Scene IR Dataset captured by our designed medium-wave infrared (MWIR sensor. Each video sequence in this dataset is identified with specific BS challenges and the pixel-wise ground truth of foreground (FG for each frame is also provided. A series of experiments were conducted to evaluate BS algorithms on this proposed dataset. The overall performance of BS algorithms and the processor/memory requirements were compared. Proper evaluation metrics or criteria were employed to evaluate the capability of each BS algorithm to handle different kinds of BS challenges represented in this dataset. The results and conclusions in this paper provide valid references to develop new BS algorithm for remote scene IR video sequence, and some of them are not only limited to remote scene or IR video sequence but also generic for background subtraction. The Remote Scene IR dataset and the foreground masks detected by each evaluated BS algorithm are available online: https://github.com/JerryYaoGl/BSEvaluationRemoteSceneIR.

  5. An evaluation of the efficacy of video displays for use with chimpanzees (Pan troglodytes).

    Science.gov (United States)

    Hopper, Lydia M; Lambeth, Susan P; Schapiro, Steven J

    2012-05-01

    Video displays for behavioral research lend themselves particularly well to studies with chimpanzees (Pan troglodytes), as their vision is comparable to humans', yet there has been no formal test of the efficacy of video displays as a form of social information for chimpanzees. To address this, we compared the learning success of chimpanzees shown video footage of a conspecific compared to chimpanzees shown a live conspecific performing the same novel task. Footage of an unfamiliar chimpanzee operating a bidirectional apparatus was presented to 24 chimpanzees (12 males, 12 females), and their responses were compared to those of a further 12 chimpanzees given the same task but with no form of information. Secondly, we also compared the responses of the chimpanzees in the video display condition to responses of eight chimpanzees from a previously published study of ours, in which chimpanzees observed live models. Chimpanzees shown a video display were more successful than those in the control condition and showed comparable success to those that saw a live model. Regarding fine-grained copying (i.e. the direction that the door was pushed), only chimpanzees that observed a live model showed significant matching to the model's methods with their first response. Yet, when all the responses made by the chimpanzees were considered, comparable levels of matching were shown by chimpanzees in both the live and video conditions. © 2012 Wiley Periodicals, Inc.

  6. Using Student Learning and Development Outcomes to Evaluate a First-Year Undergraduate Group Video Project

    OpenAIRE

    Jensen, Murray; Mattheis, Allison; Johnson, Brady

    2012-01-01

    Students in an interdisciplinary undergraduate introductory course were required to complete a group video project focused on nutrition and healthy eating. A mixed-methods approach to data collection involved observing and rating video footage of group work sessions and individual and focus group interviews. These data were analyzed and used to evaluate the effectiveness of the assignment in light of two student learning outcomes and two student development outcomes at the University of Minne...

  7. Empirical Evaluation of Superposition Coded Multicasting for Scalable Video

    KAUST Repository

    Chun Pong Lau

    2013-03-01

    In this paper we investigate cross-layer superposition coded multicast (SCM). Previous studies have proven its effectiveness in exploiting better channel capacity and service granularities via both analytical and simulation approaches. However, it has never been practically implemented using a commercial 4G system. This paper demonstrates our prototype in achieving the SCM using a standard 802.16 based testbed for scalable video transmissions. In particular, to implement the superposition coded (SPC) modulation, we take advantage a novel software approach, namely logical SPC (L-SPC), which aims to mimic the physical layer superposition coded modulation. The emulation results show improved throughput comparing with generic multicast method.

  8. Medical students' assessment of pediatric patients - teaching and evaluation using video cases.

    Science.gov (United States)

    Malon, Michelle; Cortes, Dina; Greisen, Gorm Ole

    2014-11-13

    We introduced video-based teaching in pediatrics. We evaluated the impact of a pediatric video program on student performance in assessing pediatric patients presented as video cases. The program consisted of a library of pediatric videos, and inclusion of these in the teaching and examination for pediatric medicine. Medical students on a pediatric clerkship at the University of Copenhagen assessed eight short pediatric video cases during autumn 2011 and spring 2012. Two independent observers evaluated a subset of records in a pilot study. A blind evaluation was made of the written records of 37 students before, and 58 students after, the introduction of the program using a Rubric score with four domains. The intraobserver interclass correlation coefficient was 0.94 and the interobserver interclass correlation was 0.71(n=25). The students' mean total Rubric score in spring 2012 (7.0) was significantly higher (ppediatric patients presented as video cases after the introduction of the program. The impact on real-life situations remains to be established.

  9. Performance evaluation of nonscalable MPEG-2 video coding

    Science.gov (United States)

    Schmidt, Robert L.; Puri, Atul; Haskell, Barry G.

    1994-09-01

    The second phase of the ISO Moving Picture Experts Group audio-visual coding standard (MPEG-2) is nearly complete and this standard is expected to be used in a wide range of applications at variety of bitrates. While the standard specifies the syntax of the compressed bitstream and the semantics of the decoding process, it allows considerably flexibility in choice of encoding parameters and options enabling appropriate tradeoffs in performance versus complexity as might be suitable for an application. First, we present a review of profile and level structure in MPEG-2 which is the key for enabling use of coding tools in MPEG-2. Next, we include a brief review of tools for nonscalable coding within MPEG-2 standard. Finally, we investigate via simulations, tradeoffs in coding performance with choice of various parameters and options so that within the encoder complexity that can be afforded, encoder design with good performance tradeoffs can be accomplished. Simulations are performed on standard TV and HDTV resolution video of various formats and at many bitrates using nonscalable (single layer) video coding tools of the MPEG-2 standard.

  10. Using learning analytics to evaluate a video-based lecture series.

    Science.gov (United States)

    Lau, K H Vincent; Farooque, Pue; Leydon, Gary; Schwartz, Michael L; Sadler, R Mark; Moeller, Jeremy J

    2018-01-01

    The video-based lecture (VBL), an important component of the flipped classroom (FC) and massive open online course (MOOC) approaches to medical education, has primarily been evaluated through direct learner feedback. Evaluation may be enhanced through learner analytics (LA) - analysis of quantitative audience usage data generated by video-sharing platforms. We applied LA to an experimental series of ten VBLs on electroencephalography (EEG) interpretation, uploaded to YouTube in the model of a publicly accessible MOOC. Trends in view count; total percentage of video viewed and audience retention (AR) (percentage of viewers watching at a time point compared to the initial total) were examined. The pattern of average AR decline was characterized using regression analysis, revealing a uniform linear decline in viewership for each video, with no evidence of an optimal VBL length. Segments with transient increases in AR corresponded to those focused on core concepts, indicative of content requiring more detailed evaluation. We propose a model for applying LA at four levels: global, series, video, and feedback. LA may be a useful tool in evaluating a VBL series. Our proposed model combines analytics data and learner self-report for comprehensive evaluation.

  11. Computerized tabletop games as a form of a video game training for old-old.

    Science.gov (United States)

    Cujzek, Marina; Vranic, Andrea

    2017-11-01

    This research aimed at investigating the utility of a computerized version of a cognitively stimulating activity as a video game intervention for elderly. The study focused on the effect of a 6-week extensive practice intervention on aspects of cognitive functioning (vigilance, working memory (WM), inhibition, reasoning) of old-old participants (N = 29), randomly assigned to trained or active control group. The difference between groups was in the content of the extended video game practice - cognitively complex card game for trained and computerized version of a simple dice-game of chance for control participants. A pretest, posttest and a 4-month follow-up measurement was conducted. Results revealed improvements in both groups, except for improved reasoning found only in trained participants. These results suggest that: (1) improvements are dependent on the complexity of the program, (2) cognitively stimulating activity are a valid training procedure for old-old, (3) novelty of computer use is an important factor in determining training efficacy.

  12. Social Evaluations of Stereotypic Images in Video Games: Unfair, Legitimate, or "Just Entertainment"?

    Science.gov (United States)

    Brenick, Alaina; Henning, Alexandra; Killen, Melanie; O'Connor, Alexander; Collins, Michael

    2007-01-01

    The aim of this study is to assess late adolescents' evaluations of and reasoning about gender stereotypes in video games. Female (n = 46) and male (n = 41) students, predominantly European American, with a mean age 19 years, are interviewed about their knowledge of game usage, awareness and evaluation of stereotypes, beliefs about the influences…

  13. Retrieval evaluation and distance learning from perceived similarity between endomicroscopy videos.

    Science.gov (United States)

    André, Barbara; Vercauteren, Tom; Buchner, Anna M; Wallace, Michael B; Ayache, Nicholas

    2011-01-01

    Evaluating content-based retrieval (CBR) is challenging because it requires an adequate ground-truth. When the available groundtruth is limited to textual metadata such as pathological classes, retrieval results can only be evaluated indirectly, for example in terms of classification performance. In this study we first present a tool to generate perceived similarity ground-truth that enables direct evaluation of endomicroscopic video retrieval. This tool uses a four-points Likert scale and collects subjective pairwise similarities perceived by multiple expert observers. We then evaluate against the generated ground-truth a previously developed dense bag-of-visual-words method for endomicroscopic video retrieval. Confirming the results of previous indirect evaluation based on classification, our direct evaluation shows that this method significantly outperforms several other state-of-the-art CBR methods. In a second step, we propose to improve the CBR method by learning an adjusted similarity metric from the perceived similarity ground-truth. By minimizing a margin-based cost function that differentiates similar and dissimilar video pairs, we learn a weight vector applied to the visual word signatures of videos. Using cross-validation, we demonstrate that the learned similarity distance is significantly better correlated with the perceived similarity than the original visual-word-based distance.

  14. Video-Based Self-Observation as a Component of Developmental Teacher Evaluation

    Directory of Open Access Journals (Sweden)

    Leonardo A. Mercado

    2014-09-01

    Full Text Available In this paper, we explore the benefits to teacher evaluation when video-based self-observation is done by teachers as a vehicle for individual, reflective practice. We explore how it was applied systematically at the Instituto Cultural Peruano Norteamericano (ICPNA bi-national center in Lima, Peru among hundreds of English as a foreign language (EFL teachers in two institution-wide initiatives that have relied on self-observation through video professional development. In these cases, we provide a descriptive framework for each initiative as well as information on what was ultimately achieved by teachers, supervisors and the institution as a whole. We conclude with recommendations for implementing video-based self-evaluation.

  15. Usability evaluation with screen reader users: a video presentation of the PCTA's experimental setting and rules.

    Science.gov (United States)

    Federici, Stefano; Borsci, Simone; Mele, Maria Laura

    2010-08-01

    In the study entitled "Web usability evaluation with screen reader users: Implementation of the Partial Concurrent Thinking Aloud technique" (Federici et al. 2010), we have proposed a modified protocol of usability evaluation technique for blind users, which integrates the features of the concurrent and the retrospective techniques. This new technique, called partial concurrent thinking aloud (PCTA), while respecting the properties of classic verbal protocols, overcomes the structural interference and the limits of concurrent and retrospective protocols when used with screen reader users. In order to facilitate understanding and acquisition of the PCTA's technique for practitioners and researchers, we have video recorded three different verbal protocols by visualizing five experimental sections. In the first two videos, we have compared a concurrent with a retrospective's verbal protocol of a sighted user, showing the difference of the verbalizations provided by the user in these two conditions. The third video shows the structural interference of the screen reader, during a blind user concurrent thinking aloud. In the last two videos, we show the difference of a blind user behaviour when PCTA or retrospective protocol is adopted. The videos clearly visualize the advantage of the PCTA use in respect of the two other protocols. In conclusion, the visualization of the PCTA technique confirms that this new verbal protocol promotes and guarantees a more user-driven usability assessment with disabled people, by better involving screen reader users, overcoming the structural interference and the limits of the concurrent and retrospective protocols.

  16. Performance Evaluation of Concurrent Multipath Video Streaming in Multihomed Mobile Networks

    Directory of Open Access Journals (Sweden)

    James Nightingale

    2013-01-01

    Full Text Available High-quality real-time video streaming to users in mobile networks is challenging due to the dynamically changing nature of the network paths, particularly the limited bandwidth and varying end-to-end delay. In this paper, we empirically investigate the performance of multipath streaming in the context of multihomed mobile networks. Existing schemes that make use of the aggregated bandwidth of multiple paths can overcome bandwidth limitations on a single path but suffer an efficiency penalty caused by retransmission of lost packets in reliable transport schemes or path switching overheads in unreliable transport schemes. This work focuses on the evaluation of schemes to permit concurrent use of multiple paths to deliver video streams. A comprehensive streaming framework for concurrent multipath video streaming is proposed and experimentally evaluated, using current state-of-the-art H.264 Scalable Video Coding (H.264/SVC and the next generation High Efficiency Video Coding (HEVC standards. It provides a valuable insight into the benefit of using such schemes in conjunction with encoder specific packet prioritisation mechanisms for quality-aware packet scheduling and scalable streaming. The remaining obstacles to deployment of concurrent multipath schemes are identified, and the challenges in realising HEVC based concurrent multipath streaming are highlighted.

  17. Wireless live streaming video of surgical operations: an evaluation of communication quality.

    Science.gov (United States)

    Schneider, Armin; Wilhelm, Dirk; Doll, Dietrich; Rauschenbach, Uwe; Finkenzeller, Michael; Wirnhier, Helga; Illgner, Klaus; Feussner, Hubertus

    2007-01-01

    We evaluated a mobile video system for surgical teleconsultation. A video streaming server in the operating room transmitted video and audio to a hand-held computer (personal digital assistant [PDA]) over a wireless local area network. Two groups of 20 surgeons (each with 12 qualified surgeons and eight surgeons between the 2nd and the 4th year of training) participated in the tests. For voice transmission, correct understanding of numbers was achieved in 100% of the cases (n = 1000) and 98% of medical terms (n = 400). The quality of the video displayed on the PDA was assessed by the recognition of different operating room scenarios. Only 62% (SD 17) of the structures were identified clearly on the hand-held device (n = 400). The accuracy improved to 78% (SD 15) (n = 400) if the same scenario was observed on a larger (50 cm) video screen (p < 0.001). Accuracy was significantly better if audio conversation was possible. The quality evaluation by the consultants showed that the PDA display size and quality were sufficient for clinical use.

  18. An Interdisciplinary Analysis of Microteaching Evaluation Forms: How Peer Feedback Forms Shape What Constitutes "Good Teaching"

    Science.gov (United States)

    Vander Kloet, Marie Annette; Chugh, Brige Paul

    2012-01-01

    Microteaching, a standard method for developing teaching skills, places high importance on peer feedback, which is guided by post-session feedback forms. This paper focuses on how feedback forms can shape what becomes understood as important to teaching. A sample of 10 microteaching evaluation forms drawn from North American postsecondary…

  19. A model of R-D performance evaluation for Rate-Distortion-Complexity evaluation of H.264 video coding

    DEFF Research Database (Denmark)

    Wu, Mo; Forchhammer, Søren

    2007-01-01

    This paper considers a method for evaluation of Rate-Distortion-Complexity (R-D-C) performance of video coding. A statistical model of the transformed coefficients is used to estimate the Rate-Distortion (R-D) performance. A model frame work for rate, distortion and slope of the R-D curve for inter...... and intra frame is presented. Assumptions are given for analyzing an R-D model for fast R-D-C evaluation. The theoretical expressions are combined with H.264 video coding, and confirmed by experimental results. The complexity frame work is applied to the integer motion estimation....

  20. Evaluating user preferences for video transfer methods from a mobile device to a TV screen

    DEFF Research Database (Denmark)

    Fleury, Alexandre; Pedersen, Jakob Schou; Larsen, Lars Bo

    2013-01-01

    This article reports on the evaluation of four methods for transferring video content from a mobile device to a fixed television. The methods have been investigated in a Wizard-of-Oz approach through two consecutive studies. The first experiment aimed at collecting general opinions toward such a ...

  1. An Evaluation of Streaming Digital Video Resources in On- and Off-Campus Engineering Management Education

    Science.gov (United States)

    Palmer, Stuart

    2007-01-01

    A recent television documentary on the Columbia space shuttle disaster was converted to streaming digital video format for educational use by on- and off-campus students in an engineering management study unit examining issues in professional engineering ethics. An evaluation was conducted to assess the effectiveness of this new resource. Use of…

  2. Evaluation of stereoscopic medical video content on an autostereoscopic display for undergraduate medical education

    Science.gov (United States)

    Ilgner, Justus F. R.; Kawai, Takashi; Shibata, Takashi; Yamazoe, Takashi; Westhofen, Martin

    2006-02-01

    Introduction: An increasing number of surgical procedures are performed in a microsurgical and minimally-invasive fashion. However, the performance of surgery, its possibilities and limitations become difficult to teach. Stereoscopic video has evolved from a complex production process and expensive hardware towards rapid editing of video streams with standard and HDTV resolution which can be displayed on portable equipment. This study evaluates the usefulness of stereoscopic video in teaching undergraduate medical students. Material and methods: From an earlier study we chose two clips each of three different microsurgical operations (tympanoplasty type III of the ear, endonasal operation of the paranasal sinuses and laser chordectomy for carcinoma of the larynx). This material was added by 23 clips of a cochlear implantation, which was specifically edited for a portable computer with an autostereoscopic display (PC-RD1-3D, SHARP Corp., Japan). The recording and synchronization of left and right image was performed at the University Hospital Aachen. The footage was edited stereoscopically at the Waseda University by means of our original software for non-linear editing of stereoscopic 3-D movies. Then the material was converted into the streaming 3-D video format. The purpose of the conversion was to present the video clips by a file type that does not depend on a television signal such as PAL or NTSC. 25 4th year medical students who participated in the general ENT course at Aachen University Hospital were asked to estimate depth clues within the six video clips plus cochlear implantation clips. Another 25 4th year students who were shown the material monoscopically on a conventional laptop served as control. Results: All participants noted that the additional depth information helped with understanding the relation of anatomical structures, even though none had hands-on experience with Ear, Nose and Throat operations before or during the course. The monoscopic

  3. Using student learning and development outcomes to evaluate a first-year undergraduate group video project.

    Science.gov (United States)

    Jensen, Murray; Mattheis, Allison; Johnson, Brady

    2012-01-01

    Students in an interdisciplinary undergraduate introductory course were required to complete a group video project focused on nutrition and healthy eating. A mixed-methods approach to data collection involved observing and rating video footage of group work sessions and individual and focus group interviews. These data were analyzed and used to evaluate the effectiveness of the assignment in light of two student learning outcomes and two student development outcomes at the University of Minnesota. Positive results support the continued inclusion of the project within the course, and recommend the assignment to other programs as a viable means of promoting both content learning and affective behavioral objectives.

  4. 100 Million Views of Electronic Cigarette YouTube Videos and Counting: Quantification, Content Evaluation, and Engagement Levels of Videos.

    Science.gov (United States)

    Huang, Jidong; Kornfield, Rachel; Emery, Sherry L

    2016-03-18

    The video-sharing website, YouTube, has become an important avenue for product marketing, including tobacco products. It may also serve as an important medium for promoting electronic cigarettes, which have rapidly increased in popularity and are heavily marketed online. While a few studies have examined a limited subset of tobacco-related videos on YouTube, none has explored e-cigarette videos' overall presence on the platform. To quantify e-cigarette-related videos on YouTube, assess their content, and characterize levels of engagement with those videos. Understanding promotion and discussion of e-cigarettes on YouTube may help clarify the platform's impact on consumer attitudes and behaviors and inform regulations. Using an automated crawling procedure and keyword rules, e-cigarette-related videos posted on YouTube and their associated metadata were collected between July 1, 2012, and June 30, 2013. Metadata were analyzed to describe posting and viewing time trends, number of views, comments, and ratings. Metadata were content coded for mentions of health, safety, smoking cessation, promotional offers, Web addresses, product types, top-selling brands, or names of celebrity endorsers. As of June 30, 2013, approximately 28,000 videos related to e-cigarettes were captured. Videos were posted by approximately 10,000 unique YouTube accounts, viewed more than 100 million times, rated over 380,000 times, and commented on more than 280,000 times. More than 2200 new videos were being uploaded every month by June 2013. The top 1% of most-viewed videos accounted for 44% of total views. Text fields for the majority of videos mentioned websites (70.11%); many referenced health (13.63%), safety (10.12%), smoking cessation (9.22%), or top e-cigarette brands (33.39%). The number of e-cigarette-related YouTube videos was projected to exceed 65,000 by the end of 2014, with approximately 190 million views. YouTube is a major information-sharing platform for electronic cigarettes

  5. The Global Classroom Video Conferencing Model and First Evaluations

    DEFF Research Database (Denmark)

    Weitze, Charlotte Lærke; Ørngreen, Rikke; Levinsen, Karin

    2013-01-01

    their exams. Evaluations show that the students are happy with the flexibility this model provides in their everyday life. However, our findings also show several obstacles. Firstly technical issues are at play, but also the learning design of the lessons, as well as general organizational and cultural issues...

  6. 100 Million Views of Electronic Cigarette YouTube Videos and Counting: Quantification, Content Evaluation, and Engagement Levels of Videos

    Science.gov (United States)

    2016-01-01

    Background The video-sharing website, YouTube, has become an important avenue for product marketing, including tobacco products. It may also serve as an important medium for promoting electronic cigarettes, which have rapidly increased in popularity and are heavily marketed online. While a few studies have examined a limited subset of tobacco-related videos on YouTube, none has explored e-cigarette videos’ overall presence on the platform. Objective To quantify e-cigarette-related videos on YouTube, assess their content, and characterize levels of engagement with those videos. Understanding promotion and discussion of e-cigarettes on YouTube may help clarify the platform’s impact on consumer attitudes and behaviors and inform regulations. Methods Using an automated crawling procedure and keyword rules, e-cigarette-related videos posted on YouTube and their associated metadata were collected between July 1, 2012, and June 30, 2013. Metadata were analyzed to describe posting and viewing time trends, number of views, comments, and ratings. Metadata were content coded for mentions of health, safety, smoking cessation, promotional offers, Web addresses, product types, top-selling brands, or names of celebrity endorsers. Results As of June 30, 2013, approximately 28,000 videos related to e-cigarettes were captured. Videos were posted by approximately 10,000 unique YouTube accounts, viewed more than 100 million times, rated over 380,000 times, and commented on more than 280,000 times. More than 2200 new videos were being uploaded every month by June 2013. The top 1% of most-viewed videos accounted for 44% of total views. Text fields for the majority of videos mentioned websites (70.11%); many referenced health (13.63%), safety (10.12%), smoking cessation (9.22%), or top e-cigarette brands (33.39%). The number of e-cigarette-related YouTube videos was projected to exceed 65,000 by the end of 2014, with approximately 190 million views. Conclusions YouTube is a major

  7. Social Evaluations of Stereotypic Images in Video Games: Unfair, Legitimate, or “Just Entertainment”?

    OpenAIRE

    Brenick, Alaina; Henning, Alexandra; Killen, Melanie; O'Connor, Alexander; Collins, Michael

    2007-01-01

    The aim of this study was to assess adolescents' evaluations of, and reasoning about, gender stereotypes in video games. Female (N = 46) and male (N = 41), predominantly European-American, mean age = 19 years, were interviewed about their knowledge of game usage, awareness and evaluation of stereotypes, beliefs about the influences of games on the players, and authority jurisdiction over 3 different types of games: games with negative male stereotypes, and games with negative female stereotyp...

  8. Automatable Evaluation Method Oriented toward Behaviour Believability for Video Games

    OpenAIRE

    Tencé, Fabien; Buche, Cédric

    2008-01-01

    International audience; Classic evaluation methods of believable agents are time-consuming because they involve many human to judge agents. They are well suited to validate work on new believable behaviours models. However, during the implementation, numerous experiments can help to improve agents' believability. We propose a method which aim at assessing how much an agent's behaviour looks like humans' behaviours. By representing behaviours with vectors, we can store data computed for humans...

  9. General Video Game Evaluation Using Relative Algorithm Performance Profiles

    DEFF Research Database (Denmark)

    Nielsen, Thorbjørn; Barros, Gabriella; Togelius, Julian

    2015-01-01

    In order to generate complete games through evolution we need generic and reliably evaluation functions for games. It has been suggested that game quality could be characterised through playing a game with different controllers and comparing their performance. This paper explores that idea through...... investigating the relative performance of different general game-playing algorithms. Seven game-playing algorithms was used to play several hand-designed, mutated and randomly generated VGDL game descriptions. Results discussed appear to support the conjecture that well-designed games have, in average, a higher...... performance difference between better and worse game-playing algorithms....

  10. Video games

    OpenAIRE

    Kolář, Vojtěch

    2012-01-01

    This thesis is based on a detailed analysis of various topics related to the question of whether video games can be art. In the first place it analyzes the current academic discussion on this subject and confronts different opinions of both supporters and objectors of the idea, that video games can be a full-fledged art form. The second point of this paper is to analyze the properties, that are inherent to video games, in order to find the reason, why cultural elite considers video games as i...

  11. Evaluating the efficacy of a chemistry video game

    Science.gov (United States)

    Shapiro, Marina

    A quasi-experimental design pre-test/post-test intervention study utilizing a within group analysis was conducted with 45 undergraduate college chemistry students that investigated the effect of implementing a game-based learning environment into an undergraduate college chemistry course in order to learn if serious educational games (SEGs) can be used to achieve knowledge gains of complex chemistry concepts and to achieve increase in students' positive attitude toward chemistry. To evaluate if students learn chemistry concepts by participating in a chemistry game-based learning environment, a one-way repeated measures analysis of variance (ANOVA) was conducted across three time points (pre-test, post-test, delayed post-test which were chemistry content exams). Results showed that there was an increase in exam scores over time. The results of the ANOVA indicated a statistically significant time effect. To evaluate if students' attitude towards chemistry increased as a result of participating in a chemistry game-based learning environment a paired samples t-test was conducted using a chemistry attitudinal survey by Mahdi (2014) as the pre- and post-test. Results of the paired-samples t-test indicated that there was no significant difference in pre-attitudinal scores and post-attitudinal scores.

  12. Social Evaluations of Stereotypic Images in Video Games: Unfair, Legitimate, or "Just Entertainment"?

    Science.gov (United States)

    Brenick, Alaina; Henning, Alexandra; Killen, Melanie; O'Connor, Alexander; Collins, Michael

    2007-06-01

    The aim of this study was to assess adolescents' evaluations of, and reasoning about, gender stereotypes in video games. Female (N = 46) and male (N = 41), predominantly European-American, mean age = 19 years, were interviewed about their knowledge of game usage, awareness and evaluation of stereotypes, beliefs about the influences of games on the players, and authority jurisdiction over 3 different types of games: games with negative male stereotypes, and games with negative female stereotypes, and gender-neutral games. Gender differences were found for how participants evaluated these games. Males were more likely than females to find stereotypes acceptable. Results are discussed in terms of social reasoning, video game playing, and gender differences.

  13. Social Evaluations of Stereotypic Images in Video Games: Unfair, Legitimate, or “Just Entertainment”?

    Science.gov (United States)

    Brenick, Alaina; Henning, Alexandra; Killen, Melanie; O'Connor, Alexander; Collins, Michael

    2015-01-01

    The aim of this study was to assess adolescents' evaluations of, and reasoning about, gender stereotypes in video games. Female (N = 46) and male (N = 41), predominantly European-American, mean age = 19 years, were interviewed about their knowledge of game usage, awareness and evaluation of stereotypes, beliefs about the influences of games on the players, and authority jurisdiction over 3 different types of games: games with negative male stereotypes, and games with negative female stereotypes, and gender-neutral games. Gender differences were found for how participants evaluated these games. Males were more likely than females to find stereotypes acceptable. Results are discussed in terms of social reasoning, video game playing, and gender differences. PMID:25722501

  14. Evaluation of the educational value of YouTube videos about physical examination of the cardiovascular and respiratory systems.

    Science.gov (United States)

    Azer, Samy A; Algrain, Hala A; AlKhelaif, Rana A; AlEshaiwi, Sarah M

    2013-11-13

    A number of studies have evaluated the educational contents of videos on YouTube. However, little analysis has been done on videos about physical examination. This study aimed to analyze YouTube videos about physical examination of the cardiovascular and respiratory systems. It was hypothesized that the educational standards of videos on YouTube would vary significantly. During the period from November 2, 2011 to December 2, 2011, YouTube was searched by three assessors for videos covering the clinical examination of the cardiovascular and respiratory systems. For each video, the following information was collected: title, authors, duration, number of viewers, and total number of days on YouTube. Using criteria comprising content, technical authority, and pedagogy parameters, videos were rated independently by three assessors and grouped into educationally useful and non-useful videos. A total of 1920 videos were screened. Only relevant videos covering the examination of adults in the English language were identified (n=56). Of these, 20 were found to be relevant to cardiovascular examinations and 36 to respiratory examinations. Further analysis revealed that 9 provided useful information on cardiovascular examinations and 7 on respiratory examinations: scoring mean 14.9 (SD 0.33) and mean 15.0 (SD 0.00), respectively. The other videos, 11 covering cardiovascular and 29 on respiratory examinations, were not useful educationally, scoring mean 11.1 (SD 1.08) and mean 11.2 (SD 1.29), respectively. The differences between these two categories were significant (P.86. A small number of videos about physical examination of the cardiovascular and respiratory systems were identified as educationally useful; these videos can be used by medical students for independent learning and by clinical teachers as learning resources. The scoring system utilized by this study is simple, easy to apply, and could be used by other researchers on similar topics.

  15. Evaluation of Simulated Clinical Breast Exam Motion Patterns Using Marker-Less Video Tracking.

    Science.gov (United States)

    Azari, David P; Pugh, Carla M; Laufer, Shlomi; Kwan, Calvin; Chen, Chia-Hsiung; Yen, Thomas Y; Hu, Yu Hen; Radwin, Robert G

    2016-05-01

    This study investigates using marker-less video tracking to evaluate hands-on clinical skills during simulated clinical breast examinations (CBEs). There are currently no standardized and widely accepted CBE screening techniques. Experienced physicians attending a national conference conducted simulated CBEs presenting different pathologies with distinct tumorous lesions. Single hand exam motion was recorded and analyzed using marker-less video tracking. Four kinematic measures were developed to describe temporal (time pressing and time searching) and spatial (area covered and distance explored) patterns. Mean differences between time pressing, area covered, and distance explored varied across the simulated lesions. Exams were objectively categorized as either sporadic, localized, thorough, or efficient for both temporal and spatial categories based on spatiotemporal characteristics. The majority of trials were temporally or spatially thorough (78% and 91%), exhibiting proportionally greater time pressing and time searching (temporally thorough) and greater area probed with greater distance explored (spatially thorough). More efficient exams exhibited proportionally more time pressing with less time searching (temporally efficient) and greater area probed with less distance explored (spatially efficient). Just two (5.9 %) of the trials exhibited both high temporal and spatial efficiency. Marker-less video tracking was used to discriminate different examination techniques and measure when an exam changes from general searching to specific probing. The majority of participants exhibited more thorough than efficient patterns. Marker-less video kinematic tracking may be useful for quantifying clinical skills for training and assessment. © 2015, Human Factors and Ergonomics Society.

  16. The safety of UK video telemetry units: results of a national service evaluation.

    Science.gov (United States)

    Kandler, Rosalind; Lai, Ming; Ponnusamy, Athi; Bland, Jeremy; Pang, Catherine

    2013-12-01

    To assess patient safety during seizures occurring on UK video telemetry units and identify factors in unit infrastructure which may improve safety with the intention of producing national guidelines. A prospective multicentre national service evaluation of the occurrence of adverse events and level of nurse attendance during seizures occurring on video telemetry units was performed. Data from 272 seizures from 27 video telemetry units across the UK were analysed. Adverse events occurred in 12% of seizures: 7% were physical events such as falls or respiratory compromise and 5% were unnoticed seizures. Nursing staff did not attend the patients in 44% of seizures and attendance was delayed beyond 30s in a further 29%. Only 27% of seizures were attended by a Healthcare Professional within half a minute. The most important factor shown to improve timely attendance of patients during seizures was the presence of a nurse dedicated to the telemetry bed(s). The site of the telemetry bed (bay or cubicle) and method of observation (direct or indirect) was less important. An optimal nurse-to-patient ratio was difficult to identify but the study suggests that a ratio of at least 1 nurse to 4 patients is appropriate. The results provide an evidence base for the production of national standards and guidelines for surveillance of patients during video telemetry to improve patient safety. Copyright © 2013 British Epilepsy Association. Published by Elsevier Ltd. All rights reserved.

  17. [Evaluation of the attention shift effect of a video-audio eyewear in pediatric dental treatment].

    Science.gov (United States)

    Jing, Quan; Wan, Kuo; Ma, Lin

    2010-06-01

    To evaluate the attention shift effect produced by a video-audio eyewear in pediatric dentistry. Totally 40 children aged 4-7 years were equally randomized into fissure sealant group(group S) and caries filling group(group F). A self-control comparison method was used in each group: each child took two visits to finish the whole study, they received the dental treatment either with normal method(SC, FC) or with attention shift by wearing the video-audio eyewear (SI, FI) for each visit. The degree of pain, accomplishment of treatment, and co-operation were analyzed and compared. All children were successfully managed in the whole course. The pain scores were not significantly different between SC group and SI group or between FC group and FI group (P0.05), while the Frankl scores were significantly different between SC group and SI group (P=0.04) and between FC group and FI group (P=0.03). Houpt scores were significantly different between SC group and SI group (P=0.04), but not between FC group and FI group (P=0.85). Most children (90% in group S) and (85% in group F) expressed the willingness to receive the video-audio eyewear if they were asked to do so again. The video-audio eyewear provides satisfactory attention shift for children during dental treatment and increases their cooperation. However, it has little effect on pain relieving.

  18. A data set for evaluating the performance of multi-class multi-object video tracking

    Science.gov (United States)

    Chakraborty, Avishek; Stamatescu, Victor; Wong, Sebastien C.; Wigley, Grant; Kearney, David

    2017-05-01

    One of the challenges in evaluating multi-object video detection, tracking and classification systems is having publically available data sets with which to compare different systems. However, the measures of performance for tracking and classification are different. Data sets that are suitable for evaluating tracking systems may not be appropriate for classification. Tracking video data sets typically only have ground truth track IDs, while classification video data sets only have ground truth class-label IDs. The former identifies the same object over multiple frames, while the latter identifies the type of object in individual frames. This paper describes an advancement of the ground truth meta-data for the DARPA Neovision2 Tower data set to allow both the evaluation of tracking and classification. The ground truth data sets presented in this paper contain unique object IDs across 5 different classes of object (Car, Bus, Truck, Person, Cyclist) for 24 videos of 871 image frames each. In addition to the object IDs and class labels, the ground truth data also contains the original bounding box coordinates together with new bounding boxes in instances where un-annotated objects were present. The unique IDs are maintained during occlusions between multiple objects or when objects re-enter the field of view. This will provide: a solid foundation for evaluating the performance of multi-object tracking of different types of objects, a straightforward comparison of tracking system performance using the standard Multi Object Tracking (MOT) framework, and classification performance using the Neovision2 metrics. These data have been hosted publically.

  19. Evaluating the relationship between white matter integrity, cognition, and varieties of video game learning.

    Science.gov (United States)

    Ray, Nicholas R; O'Connell, Margaret A; Nashiro, Kaoru; Smith, Evan T; Qin, Shuo; Basak, Chandramallika

    2017-01-01

    Many studies are currently researching the effects of video games, particularly in the domain of cognitive training. Great variability exists among video games however, and few studies have attempted to compare different types of video games. Little is known, for instance, about the cognitive processes or brain structures that underlie learning of different genres of video games. To examine the cognitive and neural underpinnings of two different types of game learning in order to evaluate their common and separate correlates, with the hopes of informing future intervention research. Participants (31 younger adults and 31 older adults) completed an extensive cognitive battery and played two different genres of video games, one action game and one strategy game, for 1.5 hours each. DTI scans were acquired for each participant, and regional fractional anisotropy (FA) values were extracted using the JHU atlas. Behavioral results indicated that better performance on tasks of working memory and perceptual discrimination was related to enhanced learning in both games, even after controlling for age, whereas better performance on a perceptual speed task was uniquely related with enhanced learning of the strategy game. DTI results indicated that white matter FA in the right fornix/stria terminalis was correlated with action game learning, whereas white matter FA in the left cingulum/hippocampus was correlated with strategy game learning, even after controlling for age. Although cognition, to a large extent, was a common predictor of both types of game learning, regional white matter FA could separately predict action and strategy game learning. Given the neural and cognitive correlates of strategy game learning, strategy games may provide a more beneficial training tool for adults suffering from memory-related disorders or declines in processing speed, particularly older adults.

  20. Analytical evaluation of atomic form factors: Application to Rayleigh scattering

    Energy Technology Data Exchange (ETDEWEB)

    Safari, L., E-mail: laleh.safari@ist.ac.at [IST Austria (Institute of Science and Technology Austria), Am Campus 1, 3400 Klosterneuburg (Austria); Department of Physics, University of Oulu, Box 3000, FI-90014 Oulu (Finland); Santos, J. P. [Laboratório de Instrumentação, Engenharia Biomédica e Física da Radiação (LIBPhys-UNL), Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica (Portugal); Amaro, P. [Laboratório de Instrumentação, Engenharia Biomédica e Física da Radiação (LIBPhys-UNL), Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica (Portugal); Physikalisches Institut, Universität Heidelberg, D-69120 Heidelberg (Germany); Jänkälä, K. [Department of Physics, University of Oulu, Box 3000, FI-90014 Oulu (Finland); Fratini, F. [Department of Physics, University of Oulu, Box 3000, FI-90014 Oulu (Finland); Institute of Atomic and Subatomic Physics, TU Wien, Stadionallee 2, 1020 Wien (Austria); Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG (Brazil)

    2015-05-15

    Atomic form factors are widely used for the characterization of targets and specimens, from crystallography to biology. By using recent mathematical results, here we derive an analytical expression for the atomic form factor within the independent particle model constructed from nonrelativistic screened hydrogenic wave functions. The range of validity of this analytical expression is checked by comparing the analytically obtained form factors with the ones obtained within the Hartee-Fock method. As an example, we apply our analytical expression for the atomic form factor to evaluate the differential cross section for Rayleigh scattering off neutral atoms.

  1. Evaluation of a video-based head motion tracking system for dedicated brain PET

    Science.gov (United States)

    Anishchenko, S.; Beylin, D.; Stepanov, P.; Stepanov, A.; Weinberg, I. N.; Schaeffer, S.; Zavarzin, V.; Shaposhnikov, D.; Smith, M. F.

    2015-03-01

    Unintentional head motion during Positron Emission Tomography (PET) data acquisition can degrade PET image quality and lead to artifacts. Poor patient compliance, head tremor, and coughing are examples of movement sources. Head motion due to patient non-compliance can be an issue with the rise of amyloid brain PET in dementia patients. To preserve PET image resolution and quantitative accuracy, head motion can be tracked and corrected in the image reconstruction algorithm. While fiducial markers can be used, a contactless approach is preferable. A video-based head motion tracking system for a dedicated portable brain PET scanner was developed. Four wide-angle cameras organized in two stereo pairs are used for capturing video of the patient's head during the PET data acquisition. Facial points are automatically tracked and used to determine the six degree of freedom head pose as a function of time. The presented work evaluated the newly designed tracking system using a head phantom and a moving American College of Radiology (ACR) phantom. The mean video-tracking error was 0.99±0.90 mm relative to the magnetic tracking device used as ground truth. Qualitative evaluation with the ACR phantom shows the advantage of the motion tracking application. The developed system is able to perform tracking with accuracy close to millimeter and can help to preserve resolution of brain PET images in presence of movements.

  2. Development and evaluation of online video teaching resources to enhance student knowledge of livestock handling.

    Science.gov (United States)

    Klupiec, C; Pope, S; Taylor, R; Carroll, D; Ward, M H; Celi, P

    2014-07-01

    To evaluate the effectiveness of online audiovisual materials to support the acquisition of animal handling skills by students of veterinary and animal science. A series of video clips (Livestock Handling modules) demonstrating livestock handling procedures was created and delivered online to students enrolled in the Faculty of Veterinary Science, University of Sydney. The effectiveness of these modules for supporting student learning was evaluated via an online survey. The survey also sought feedback on how students could be better prepared for handling livestock. The survey indicated that students found the videos a useful part of their learning experience, particularly by familiarising them with correct handling procedures and emphasising the importance of safety when handling livestock. Students also highlighted that online delivery supported flexible learning. Suggested improvements of the Livestock Handling modules centred around broadening the content of the videos and improving the user-friendliness of online access. Student feedback regarding how the Faculty could better prepare them for livestock handling was dominated by requests for more opportunities to practise animal handling using live animals. The Livestock Handling audiovisual tool is a valuable supplementary resource for developing students' proficiency in safe and effective handling of livestock. However, the results also clearly reveal a perception by students that more hands-on experience is required for acquisition of animal handling skills. These findings will inform future development of the Faculty's animal handling program. © 2014 Australian Veterinary Association.

  3. Comprehensive Analysis and Evaluation of Background Subtraction Algorithms for Surveillance Video

    Directory of Open Access Journals (Sweden)

    Yan Feng

    2014-08-01

    Full Text Available Background Subtraction techniques are the basis for moving target detection and tracking in the domain of video surveillance, while the robust and reliable detection and tracking algorithms in complex environment is a challenging subject, so evaluations of various background subtraction algorithms are of great significance. Nine state of the art methods ranging from simple to sophisticated ones are discussed. Then the algorithms were implemented and tested using different videos with ground truth, such as baseline, dynamic background, camera jitter, and intermittent object motion and shadow scenarios. The best suited background modeling methods for each scenario are given by comprehensive analysis of three parameters: recall, precision and F-Measure, which facilitates more accurate target detection and tracking.

  4. Evaluation of video transmission of MAC protocols in wireless sensor network

    Science.gov (United States)

    Maulidin, Mahmuddin, M.; Kamaruddin, L. M.; Elsaikh, Mohamed

    2016-08-01

    Wireless Sensor Network (WSN) is a wireless network which consists of sensor nodes scattered in a particular area which are used to monitor physical or environment condition. Each node in WSN is also scattered in sensor field, so an appropriate scheme of MAC protocol should have to develop communication link for data transferring. Video transmission is one of the important applications for the future that can be transmitted with low aspect in side of cost and also power consumption. In this paper, comparison of five different MAC WSN protocol for video transmission namely IEEE 802.11 standard, IEEE 802.15.4 standard, CSMA/CA, Berkeley-MAC, and Lightweight-MAC protocol are studied. Simulation experiment has been conducted in OMNeT++ with INET network simulator software to evaluate the performance. Obtained results indicate that IEEE 802.11 works better than other protocol in term of packet delivery, throughput, and latency.

  5. A comparison of two forms of teaching instruction: video vs. live lecture for education in clinical periodontology.

    Science.gov (United States)

    Ramlogan, S; Raman, V; Sweet, J

    2014-02-01

    This crossover controlled study aimed to compare the knowledge and skill attained by third-year dental students in three clinical exercises in the discipline of periodontology through video and live lecture instruction. Students (n = 35) segregated into two group either viewed a video or attended a live lecture repeated over three clinical teaching sessions. Pre-test and post-test written assessments were completed and comparisons between video and live lecture done (analysis of variance, P periodontology training may have limitations unless supplemented by appropriate learning activities. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  6. Cross-platform digital assessment forms for evaluating surgical skills

    Directory of Open Access Journals (Sweden)

    Steven Arild Wuyts Andersen

    2015-04-01

    Full Text Available A variety of structured assessment tools for use in surgical training have been reported, but extant assessment tools often employ paper-based rating forms. Digital assessment forms for evaluating surgical skills could potentially offer advantages over paper-based forms, especially in complex assessment situations. In this paper, we report on the development of cross-platform digital assessment forms for use with multiple raters in order to facilitate the automatic processing of surgical skills assessments that include structured ratings. The FileMaker 13 platform was used to create a database containing the digital assessment forms, because this software has cross-platform functionality on both desktop computers and handheld devices. The database is hosted online, and the rating forms can therefore also be accessed through most modern web browsers. Cross-platform digital assessment forms were developed for the rating of surgical skills. The database platform used in this study was reasonably priced, intuitive for the user, and flexible. The forms have been provided online as free downloads that may serve as the basis for further development or as inspiration for future efforts. In conclusion, digital assessment forms can be used for the structured rating of surgical skills and have the potential to be especially useful in complex assessment situations with multiple raters, repeated assessments in various times and locations, and situations requiring substantial subsequent data processing or complex score calculations.

  7. Cross-platform digital assessment forms for evaluating surgical skills.

    Science.gov (United States)

    Andersen, Steven Arild Wuyts

    2015-01-01

    A variety of structured assessment tools for use in surgical training have been reported, but extant assessment tools often employ paper-based rating forms. Digital assessment forms for evaluating surgical skills could potentially offer advantages over paper-based forms, especially in complex assessment situations. In this paper, we report on the development of cross-platform digital assessment forms for use with multiple raters in order to facilitate the automatic processing of surgical skills assessments that include structured ratings. The FileMaker 13 platform was used to create a database containing the digital assessment forms, because this software has cross-platform functionality on both desktop computers and handheld devices. The database is hosted online, and the rating forms can therefore also be accessed through most modern web browsers. Cross-platform digital assessment forms were developed for the rating of surgical skills. The database platform used in this study was reasonably priced, intuitive for the user, and flexible. The forms have been provided online as free downloads that may serve as the basis for further development or as inspiration for future efforts. In conclusion, digital assessment forms can be used for the structured rating of surgical skills and have the potential to be especially useful in complex assessment situations with multiple raters, repeated assessments in various times and locations, and situations requiring substantial subsequent data processing or complex score calculations.

  8. User Experience Evaluations in Rehabilitation Video Games for Children: A Systematic Mapping of the Literature.

    Science.gov (United States)

    Rico-Olarte, Carolina; López, Diego M; Blobel, Bernd; Kepplinger, Sara

    2017-01-01

    In recent years, the interest in user experience (UX) evaluation methods for assessing technology solutions, especially in health systems for children with special needs like cognitive disabilities, has increased. Conduct a systematic mapping study to provide an overview in the field of UX evaluations in rehabilitation video games for children. The definition of research questions, the search for primary studies and the extraction of those studies by inclusion and exclusion criteria lead to the mapping of primary papers according to a classification scheme. Main findings from this study include the detection of the target population of the selected studies, the recognition of two different ways of evaluating UX: (i) user evaluation and (ii) system evaluation, and UX measurements and devices used. This systematic mapping specifies the research gaps identified for future research works in the area.

  9. Animated educational video to prepare children for MRI without sedation: evaluation of the appeal and value

    Energy Technology Data Exchange (ETDEWEB)

    Szeszak, Szofia [University of Nottingham, Radiological Sciences, Division of Clinical Neuroscience, Queen' s Medical Centre, Nottingham (United Kingdom); Man, Rachel; Love, Andrew [Nottingham Trent University, School of Art and Design, Nottingham (United Kingdom); Langmack, Gill; Wharrad, Heather [University of Nottingham, Health E-learning and Media group, School of Health Sciences, Queen' s Medical Centre, Nottingham (United Kingdom); Dineen, Robert A. [University of Nottingham, Radiological Sciences, Division of Clinical Neuroscience, Queen' s Medical Centre, Nottingham (United Kingdom); University of Nottingham, Sir Peter Mansfield Imaging Centre, Queen' s Medical Centre, Nottingham (United Kingdom)

    2016-11-15

    MRI scans can be distressing for children and often require sedation. Educating children about what to expect reduces anxiety and increases likelihood of successful non-sedated MRI scans. Multimedia tools are a popular means of education. Animated video could provide a free, accessible method of preparing children for MRI scans. To evaluate a new animation video for preparing children for MRI, specifically for decreasing in-scanner motion and examination failure. We recruited 24 healthy children ages 5-11 years. Participants underwent pre- and post-viewing questionnaires and structured interviews. We then compared median Likert scale score changes between pre- and post-animation questions and analyzed the interview framework. Participants were filmed viewing the animation to calculate time spent looking at the screen to assess how well the video retained children's attention. There were significant improvements in median scores regarding what to expect, checking for metal and keeping still. There were no significant changes in other knowledge-based topics. There were significant improvements in median scores for anxiety-based topics. On average, children watched the screen for 98.9% of the 174-s animation. The animation improved knowledge, reduced anxiety, retained attention and was enjoyed by participants. It can be accessed freely via the Internet to help prepare children ages 5-11 for having an MRI scan. (orig.)

  10. Animated educational video to prepare children for MRI without sedation: evaluation of the appeal and value.

    Science.gov (United States)

    Szeszak, Szofia; Man, Rachel; Love, Andrew; Langmack, Gill; Wharrad, Heather; Dineen, Robert A

    2016-11-01

    MRI scans can be distressing for children and often require sedation. Educating children about what to expect reduces anxiety and increases likelihood of successful non-sedated MRI scans. Multimedia tools are a popular means of education. Animated video could provide a free, accessible method of preparing children for MRI scans. To evaluate a new animation video for preparing children for MRI, specifically for decreasing in-scanner motion and examination failure. We recruited 24 healthy children ages 5-11 years. Participants underwent pre- and post-viewing questionnaires and structured interviews. We then compared median Likert scale score changes between pre- and post-animation questions and analyzed the interview framework. Participants were filmed viewing the animation to calculate time spent looking at the screen to assess how well the video retained children's attention. There were significant improvements in median scores regarding what to expect, checking for metal and keeping still. There were no significant changes in other knowledge-based topics. There were significant improvements in median scores for anxiety-based topics. On average, children watched the screen for 98.9% of the 174-s animation. The animation improved knowledge, reduced anxiety, retained attention and was enjoyed by participants. It can be accessed freely via the Internet to help prepare children ages 5-11 for having an MRI scan.

  11. The efficacy of video monitoring-supported student self-evaluation of dental explorer skills in dental hygiene education.

    Science.gov (United States)

    Tano, R; Takaku, S; Ozaki, T

    2017-11-01

    The objective of this study was to investigate whether having dental hygiene students monitor video recordings of their dental explorer skills is an effective means of proper self-evaluation in dental hygiene education. The study participants comprised students of a dental hygiene training school who had completed a module on explorer skills using models, and a dental hygiene instructor who was in charge of lessons. Questions regarding 'posture', 'grip', 'finger rest' and 'operation' were set to evaluate explorer skills. Participants rated each item on a two-point scale: 'competent (1)' or 'not competent (0)'. The total score was calculated for each evaluation item in evaluations by students with and without video monitoring, and in evaluations by the instructor with video monitoring. Mean scores for students with and without video monitoring were compared using a t-test, while intraclass correlation coefficients were found by reliability analysis of student and instructor evaluations. A total of 37 students and one instructor were subject to analysis. The mean score for evaluations with and without video monitoring differed significantly for posture (P < 0.0001), finger rest (P = 0.0006) and operation (P < 0.0001). The intraclass correlation coefficient between students and instructors for evaluations with video monitoring ranged from 0.90 to 0.97 for the four evaluation items. The results of this study suggested that having students monitor video recordings of their own explorer skills may be an effective means of proper self-evaluation in specialized basic education using models. © 2016 The Authors. International Journal of Dental Hygiene Published by John Wiley& Sons Ltd.

  12. Evaluation of H.264 and H.265 full motion video encoding for small UAS platforms

    Science.gov (United States)

    McGuinness, Christopher D.; Walker, David; Taylor, Clark; Hill, Kerry; Hoffman, Marc

    2016-05-01

    Of all the steps in the image acquisition and formation pipeline, compression is the only process that degrades image quality. A selected compression algorithm succeeds or fails to provide sufficient quality at the requested compression rate depending on how well the algorithm is suited to the input data. Applying an algorithm designed for one type of data to a different type often results in poor compression performance. This is mostly the case when comparing the performance of H.264, designed for standard definition data, to HEVC (High Efficiency Video Coding), which the Joint Collaborative Team on Video Coding (JCT-VC) designed for high-definition data. This study focuses on evaluating how HEVC compares to H.264 when compressing data from small UAS platforms. To compare the standards directly, we assess two open-source traditional software solutions: x264 and x265. These software-only comparisons allow us to establish a baseline of how much improvement can generally be expected of HEVC over H.264. Then, specific solutions leveraging different types of hardware are selected to understand the limitations of commercial-off-the-shelf (COTS) options. Algorithmically, regardless of the implementation, HEVC is found to provide similar quality video as H.264 at 40% lower data rates for video resolutions greater than 1280x720, roughly 1 Megapixel (MPx). For resolutions less than 1MPx, H.264 is an adequate solution though a small (roughly 20%) compression boost is earned by employing HEVC. New low cost, size, weight, and power (CSWAP) HEVC implementations are being developed and will be ideal for small UAS systems.

  13. Intracranial video-EEG monitoring in presurgical evaluation of patients with refractory epilepsy.

    Science.gov (United States)

    Hupalo, Marlena; Wojcik, Rafal; Jaskolski, Dariusz J

    Reviewing our experience in intracranial video-EEG monitoring in the presurgical evaluation of patients with refractory epilepsy. We report on 62 out of 202 (31%) patients with refractory epilepsy, who underwent a long term video-EEG monitoring (LTM). The epileptogenic zone (EZ) was localised either based on the results of LTM or after intracranial EEG recordings from depth, subdural or foramen ovale electrodes. The decision on the location of the electrodes was based upon semiology of the seizures, EEG findings and the lesions visualised in MRI brain scan. Intraoperative corticography was carried out before and right after the resection of the seizure onset zone. The video-EEG monitoring could localise EZ in 43 (69%) cases based. The remaining patients underwent invasive diagnostics: 10 (53%) had intracerebral depth electrodes, 6 (31%) depth and subdural and 3 (16%) foramen ovale electrodes. Intracranial video EEG recordings showed seizure focus in all the patients. Ten of them had EZ in mesial temporal structures, 4 in accessory motor area, 3 at the base of the frontal lobe and 2 in parietal lobe. There was one case of an asymptomatic intracerebral haematoma at the electrode. All patients were subsequently operated on. In 15 (79%) cases the seizures subsided (follow-up from 2 to 5 years), in 4 (21%) they decreased. The intracranial EEG is required in all patients with normal MRI (so-called nonlesional cases) in whom EZ is suspected to be located in the hippocampus, insula or in the basal parts of the frontal lobe. Copyright © 2017 Polish Neurological Society. Published by Elsevier Urban & Partner Sp. z o.o. All rights reserved.

  14. Constitution of the forest road evaluation form for Turkish forestry ...

    African Journals Online (AJOL)

    The method of. Analytical Hierarchy Process (AHP) was used to define the significance rates at the step of factor evaluation. Survey method was applied for expert ... Factors in the form and their respective significance rates were defined as vertical slope value, 12.73%; condition of superstructure, 6.89%; condition of art ...

  15. Formulation and evaluation of tablet dosage form of Hunteria ...

    African Journals Online (AJOL)

    The present study was aimed at formulating and evaluating tablet dosage form of Hunteria umbellata (HU) seed aqueous and purified extracts. HU seeds were dried, pulverized and the powder macerated in water to obtain aqueous extract, while alkaloidal extraction process was used to obtain purified extract. Extracts ...

  16. Evaluation of the antioxidant effects of different forms of Schisandra ...

    African Journals Online (AJOL)

    The effects of different forms of Schisandra chinesis extract (20% S. chinensis juice, 20% S. chinensis ethanol extract, and 20% S. chinensis water extract) on physico-chemical characteristics and color in emulsion-type sausage were evaluated. Physico-chemical characteristics and color were determined during storage.

  17. Evaluation and Simulation of Common Video Conference Traffics in Communication Networks

    Directory of Open Access Journals (Sweden)

    Farhad faghani

    2014-01-01

    Full Text Available Multimedia traffics are the basic traffics in data communication networks. Especially Video conferences are the most desirable traffics in huge networks(wired, wireless, …. Traffic modeling can help us to evaluate the real networks. So, in order to have good services in data communication networks which provide multimedia services, QoS will be very important .In this research we tried to have an exact traffic model design and simulation to overcome QoS challenges. Also, we predict bandwidth by Kalman filter in Ethernet networks.

  18. Evaluation of Basic Skills Improvement for Laparoscopy by Training with a Video Game

    Directory of Open Access Journals (Sweden)

    María Fernanda Gómez-Ramírez

    2014-06-01

    Full Text Available Introduction: Due to the growing economical and ethical limitations in surgeons training for minimally invasive surgery (mis, e.g. laparoscopy, this study aims at evaluating the effect of a continuous practice of a particular videogame on the development of the fundamental and specific skills needed to perform this type of procedure successfully. Materials and methods: To evaluate the effectiveness of video game practicing, three essential and common activities were chosen (cutting, suturing, and eye-hand coordination to be performed in laparoscopic simulators. Eight different indexes or variables of performance were measured in the three activities. Fourteen voluntaries without previous experience in surgery were divided in two groups (intervention and control and their performance was evaluated before and after a one-month standardized training program with the video game Marble Mania®. Results: A general improvement of all the performance variables was observed after one month training in the intervention group. This improvement was significant with respect to the control group in three of the eight variables: suturing errors (p = 0.003, and the execution and number of errors in the eye-hand coordination (p = 0.025 and 0.001, respectively.

  19. Reward system and temporal pole contributions to affective evaluation during a first person shooter video game

    Science.gov (United States)

    2011-01-01

    Background Violent content in video games evokes many concerns but there is little research concerning its rewarding aspects. It was demonstrated that playing a video game leads to striatal dopamine release. It is unclear, however, which aspects of the game cause this reward system activation and if violent content contributes to it. We combined functional Magnetic Resonance Imaging (fMRI) with individual affect measures to address the neuronal correlates of violence in a video game. Results Thirteen male German volunteers played a first-person shooter game (Tactical Ops: Assault on Terror) during fMRI measurement. We defined success as eliminating opponents, and failure as being eliminated themselves. Affect was measured directly before and after game play using the Positive and Negative Affect Schedule (PANAS). Failure and success events evoked increased activity in visual cortex but only failure decreased activity in orbitofrontal cortex and caudate nucleus. A negative correlation between negative affect and responses to failure was evident in the right temporal pole (rTP). Conclusions The deactivation of the caudate nucleus during failure is in accordance with its role in reward-prediction error: it occurred whenever subject missed an expected reward (being eliminated rather than eliminating the opponent). We found no indication that violence events were directly rewarding for the players. We addressed subjective evaluations of affect change due to gameplay to study the reward system. Subjects reporting greater negative affect after playing the game had less rTP activity associated with failure. The rTP may therefore be involved in evaluating the failure events in a social context, to regulate the players' mood. PMID:21749711

  20. Reward system and temporal pole contributions to affective evaluation during a first person shooter video game

    Directory of Open Access Journals (Sweden)

    Weber René

    2011-07-01

    Full Text Available Abstract Background Violent content in video games evokes many concerns but there is little research concerning its rewarding aspects. It was demonstrated that playing a video game leads to striatal dopamine release. It is unclear, however, which aspects of the game cause this reward system activation and if violent content contributes to it. We combined functional Magnetic Resonance Imaging (fMRI with individual affect measures to address the neuronal correlates of violence in a video game. Results Thirteen male German volunteers played a first-person shooter game (Tactical Ops: Assault on Terror during fMRI measurement. We defined success as eliminating opponents, and failure as being eliminated themselves. Affect was measured directly before and after game play using the Positive and Negative Affect Schedule (PANAS. Failure and success events evoked increased activity in visual cortex but only failure decreased activity in orbitofrontal cortex and caudate nucleus. A negative correlation between negative affect and responses to failure was evident in the right temporal pole (rTP. Conclusions The deactivation of the caudate nucleus during failure is in accordance with its role in reward-prediction error: it occurred whenever subject missed an expected reward (being eliminated rather than eliminating the opponent. We found no indication that violence events were directly rewarding for the players. We addressed subjective evaluations of affect change due to gameplay to study the reward system. Subjects reporting greater negative affect after playing the game had less rTP activity associated with failure. The rTP may therefore be involved in evaluating the failure events in a social context, to regulate the players' mood.

  1. Reward system and temporal pole contributions to affective evaluation during a first person shooter video game.

    Science.gov (United States)

    Mathiak, Krystyna A; Klasen, Martin; Weber, René; Ackermann, Hermann; Shergill, Sukhwinder S; Mathiak, Klaus

    2011-07-12

    Violent content in video games evokes many concerns but there is little research concerning its rewarding aspects. It was demonstrated that playing a video game leads to striatal dopamine release. It is unclear, however, which aspects of the game cause this reward system activation and if violent content contributes to it. We combined functional Magnetic Resonance Imaging (fMRI) with individual affect measures to address the neuronal correlates of violence in a video game. Thirteen male German volunteers played a first-person shooter game (Tactical Ops: Assault on Terror) during fMRI measurement. We defined success as eliminating opponents, and failure as being eliminated themselves. Affect was measured directly before and after game play using the Positive and Negative Affect Schedule (PANAS). Failure and success events evoked increased activity in visual cortex but only failure decreased activity in orbitofrontal cortex and caudate nucleus. A negative correlation between negative affect and responses to failure was evident in the right temporal pole (rTP). The deactivation of the caudate nucleus during failure is in accordance with its role in reward-prediction error: it occurred whenever subject missed an expected reward (being eliminated rather than eliminating the opponent). We found no indication that violence events were directly rewarding for the players. We addressed subjective evaluations of affect change due to gameplay to study the reward system. Subjects reporting greater negative affect after playing the game had less rTP activity associated with failure. The rTP may therefore be involved in evaluating the failure events in a social context, to regulate the players' mood.

  2. Relative Hidden Markov Models for Video-Based Evaluation of Motion Skills in Surgical Training.

    Science.gov (United States)

    Zhang, Qiang; Li, Baoxin

    2015-06-01

    A proper temporal model is essential to analysis tasks involving sequential data. In computer-assisted surgical training, which is the focus of this study, obtaining accurate temporal models is a key step towards automated skill-rating. Conventional learning approaches can have only limited success in this domain due to insufficient amount of data with accurate labels. We propose a novel formulation termed Relative Hidden Markov Model and develop algorithms for obtaining a solution under this formulation. The method requires only relative ranking between input pairs, which are readily available from training sessions in the target application, hence alleviating the requirement on data labeling. The proposed algorithm learns a model from the training data so that the attribute under consideration is linked to the likelihood of the input, hence supporting comparing new sequences. For evaluation, synthetic data are first used to assess the performance of the approach, and then we experiment with real videos from a widely-adopted surgical training platform. Experimental results suggest that the proposed approach provides a promising solution to video-based motion skill evaluation. To further illustrate the potential of generalizing the method to other applications of temporal analysis, we also report experiments on using our model on speech-based emotion recognition.

  3. Development and Reliability Evaluation of the Movement Rating Instrument for Virtual Reality Video Game Play.

    Science.gov (United States)

    Levac, Danielle; Nawrotek, Joanna; Deschenes, Emilie; Giguere, Tia; Serafin, Julie; Bilodeau, Martin; Sveistrup, Heidi

    2016-06-01

    Virtual reality active video games are increasingly popular physical therapy interventions for children with cerebral palsy. However, physical therapists require educational resources to support decision making about game selection to match individual patient goals. Quantifying the movements elicited during virtual reality active video game play can inform individualized game selection in pediatric rehabilitation. The objectives of this study were to develop and evaluate the feasibility and reliability of the Movement Rating Instrument for Virtual Reality Game Play (MRI-VRGP). Item generation occurred through an iterative process of literature review and sample videotape viewing. The MRI-VRGP includes 25 items quantifying upper extremity, lower extremity, and total body movements. A total of 176 videotaped 90-second game play sessions involving 7 typically developing children and 4 children with cerebral palsy were rated by 3 raters trained in MRI-VRGP use. Children played 8 games on 2 virtual reality and active video game systems. Intraclass correlation coefficients (ICCs) determined intra-rater and interrater reliability. Excellent intrarater reliability was evidenced by ICCs of >0.75 for 17 of the 25 items across the 3 raters. Interrater reliability estimates were less precise. Excellent interrater reliability was achieved for far reach upper extremity movements (ICC=0.92 [for right and ICC=0.90 for left) and for squat (ICC=0.80) and jump items (ICC=0.99), with 9 items achieving ICCs of >0.70, 12 items achieving ICCs of between 0.40 and 0.70, and 4 items achieving poor reliability (close-reach upper extremity-ICC=0.14 for right and ICC=0.07 for left) and single-leg stance (ICC=0.55 for right and ICC=0.27 for left). Poor video quality, differing item interpretations between raters, and difficulty quantifying the high-speed movements involved in game play affected reliability. With item definition clarification and further psychometric property evaluation, the MRI

  4. Redox Biology Course Evaluation Form | Center for Cancer Research

    Science.gov (United States)

    To improve the Redox Biology (RB) course in future years, we would appreciate your feedback by completing this course evaluation. Please score the course elements as poor, fair, average, good or excellent. Please type any comments that you have in response to the questions at the bottom of the form. Remember to include your name as you wish it to appear on the certificate. Thank you for your feedback.

  5. Usability Evaluation of a Video Conferencing System in a University’s Classroom

    DEFF Research Database (Denmark)

    Khalid, Md. Saifuddin; Hossan, Md. Iqbal

    2016-01-01

    The integration of video conferencing systems (VCS) have increased significantly in the classrooms and administrative practices of higher education institutions. The VCSs discussed in the existing literature can be broadly categorized as desktop systems (e.g. Scopia), WebRTC or Real......-Time Communications (e.g. Google Hangout, Adobe Connect, Cisco WebEx, and appear.in), and dedicated (e.g. Polycom). There is a lack of empirical study on usability evaluation of the interactive systems in educational contexts. This study identifies usability errors and measures user satisfaction of a dedicated VCS......) analysis of 12 user responses results below average score. Poststudy system test by the vendor has identified cabling and setup error. Applying SUMI followed by qualitative methods might enrich evaluation outcomes....

  6. Using video-based observation research methods in primary care health encounters to evaluate complex interactions

    Directory of Open Access Journals (Sweden)

    Onur Asan

    2014-08-01

    Full Text Available Objective The purpose of this paper is to describe the use of video-based observation research methods in primary care environment and highlight important methodological considerations and provide practical guidance for primary care and human factors researchers conducting video studies to understand patient–clinician interaction in primary care settings.Methods We reviewed studies in the literature which used video methods in health care research, and we also used our own experience based on the video studies we conducted in primary care settings.Results This paper highlighted the benefits of using video techniques, such as multi-channel recording and video coding, and compared “unmanned” video recording with the traditional observation method in primary care research. We proposed a list that can be followed step by step to conduct an effective video study in a primary care setting for a given problem. This paper also described obstacles, researchers should anticipate when using video recording methods in future studies.Conclusion With the new technological improvements, video-based observation research is becoming a promising method in primary care and HFE research. Video recording has been under-utilised as a data collection tool because of confidentiality and privacy issues. However, it has many benefits as opposed to traditional observations, and recent studies using video recording methods have introduced new research areas and approaches.

  7. Using video-based observation research methods in primary care health encounters to evaluate complex interactions.

    Science.gov (United States)

    Asan, Onur; Montague, Enid

    2014-01-01

    The purpose of this paper is to describe the use of video-based observation research methods in primary care environment and highlight important methodological considerations and provide practical guidance for primary care and human factors researchers conducting video studies to understand patient-clinician interaction in primary care settings. We reviewed studies in the literature which used video methods in health care research, and we also used our own experience based on the video studies we conducted in primary care settings. This paper highlighted the benefits of using video techniques, such as multi-channel recording and video coding, and compared "unmanned" video recording with the traditional observation method in primary care research. We proposed a list that can be followed step by step to conduct an effective video study in a primary care setting for a given problem. This paper also described obstacles, researchers should anticipate when using video recording methods in future studies. With the new technological improvements, video-based observation research is becoming a promising method in primary care and HFE research. Video recording has been under-utilised as a data collection tool because of confidentiality and privacy issues. However, it has many benefits as opposed to traditional observations, and recent studies using video recording methods have introduced new research areas and approaches.

  8. Video visual analytics

    OpenAIRE

    Höferlin, Markus Johannes

    2013-01-01

    The amount of video data recorded world-wide is tremendously growing and has already reached hardly manageable dimensions. It originates from a wide range of application areas, such as surveillance, sports analysis, scientific video analysis, surgery documentation, and entertainment, and its analysis represents one of the challenges in computer science. The vast amount of video data renders manual analysis by watching the video data impractical. However, automatic evaluation of video material...

  9. Evaluation of Generalized Performance across Materials When Using Video Technology by Students with Autism Spectrum Disorder and Moderate Intellectual Disability

    Science.gov (United States)

    Mechling, Linda C.; Ayres, Kevin M.; Foster, Ashley L.; Bryant, Kathryn J.

    2015-01-01

    The purpose of this study was to evaluate the ability of four high school-aged students with a diagnosis of autism spectrum disorder and moderate intellectual disability to generalize performance of skills when using materials different from those presented through video models. An adapted alternating treatments design was used to evaluate student…

  10. Use of automated video analysis for the evaluation of bicycle movement and interaction

    Science.gov (United States)

    Twaddle, Heather; Schendzielorz, Tobias; Fakler, Oliver; Amini, Sasan

    2014-03-01

    With the purpose of developing valid models of microscopic bicycle behavior, a large quantity of video data is collected at three busy urban intersections in Munich, Germany. Due to the volume of data, the manual processing of this data is infeasible and an automated or semi-automated analysis method must be implemented. An open source software, "Traffic Intelligence", is used and extended to analyze the collected video data with regard to research questions concerning the tactical behavior of bicyclists. In a first step, the feature detection parameters, the tracking parameters and the object grouping parameters are calibrated, making it possible to accurately track and group the objects at intersections used by large volumes of motor vehicles, bicycles and pedestrians. The resulting parameters for the three intersections are presented. A methodology for the classification of road users as cars, bicycles or pedestrians is presented and evaluated. This is achieved by making hypotheses about which features belong to cars, or bicycles and pedestrians, and using grouping parameters specified for that road user group to cluster the features into objects. These objects are then classified based on their dynamic characteristics. A classification structure for the maneuvers of different road users is presented and future applications are discussed.

  11. Neurosurgical Skills Assessment: Measuring Technical Proficiency in Neurosurgery Residents Through Intraoperative Video Evaluations.

    Science.gov (United States)

    Sarkiss, Christopher A; Philemond, Steven; Lee, James; Sobotka, Stanislaw; Holloway, Terrell D; Moore, Maximillian M; Costa, Anthony B; Gordon, Errol L; Bederson, Joshua B

    2016-05-01

    Although technical skills are fundamental in neurosurgery, there is little agreement on how to describe, measure, or compare skills among surgeons. The primary goal of this study was to develop a quantitative grading scale for technical surgical performance that distinguishes operator skill when graded by domain experts (residents, attendings, and nonsurgeons). Scores provided by raters should be highly reliable with respect to scores from other observers. Neurosurgery residents were fitted with a head-mounted video camera while performing craniotomies under attending supervision. Seven videos, 1 from each postgraduate year (PGY) level (1-7), were anonymized and scored by 16 attendings, 8 residents, and 7 nonsurgeons using a grading scale. Seven skills were graded: incision, efficiency of instrument use, cauterization, tissue handling, drilling/craniotomy, confidence, and training level. A strong correlation was found between skills score and PGY year (P Technical skills of neurosurgery residents recorded during craniotomy can be measured with high interrater reliability. Surgeons and nonsurgeons alike readily distinguish different skill levels. This type of assessment could be used to coach residents, to track performance over time, and potentially to compare skill levels. Developing an objective tool to evaluate surgical performance would be useful in several areas of neurosurgery education. Copyright © 2016 Elsevier Inc. All rights reserved.

  12. Performance evaluation of real-time video content analysis systems in the CANDELA project

    Science.gov (United States)

    Desurmont, Xavier; Wijnhoven, Rob; Jaspers, Egbert; Caignart, Olivier; Barais, Mike; Favoreel, Wouter; Delaigle, Jean-Francois

    2005-02-01

    The CANDELA project aims at realizing a system for real-time image processing in traffic and surveillance applications. The system performs segmentation, labels the extracted blobs and tracks their movements in the scene. Performance evaluation of such a system is a major challenge since no standard methods exist and the criteria for evaluation are highly subjective. This paper proposes a performance evaluation approach for video content analysis (VCA) systems and identifies the involved research areas. For these areas we give an overview of the state-of-the-art in performance evaluation and introduce a classification into different semantic levels. The proposed evaluation approach compares the results of the VCA algorithm with a ground-truth (GT) counterpart, which contains the desired results. Both the VCA results and the ground truth comprise description files that are formatted in MPEG-7. The evaluation is required to provide an objective performance measure and a mean to choose between competitive methods. In addition, it enables algorithm developers to measure the progress of their work at the different levels in the design process. From these requirements and the state-of-the-art overview we conclude that standardization is highly desirable for which many research topics still need to be addressed.

  13. Development, evaluation, and utility of a peer evaluation form for online teaching.

    Science.gov (United States)

    Gaskamp, Carol D; Kintner, Eileen

    2014-01-01

    Formative assessment of teaching by peers is an important component of quality improvement for educators. Teaching portfolios submitted for promotion and tenure are expected to include peer evaluations. Faculty resources designed for peer evaluation of classroom teaching are often inadequate for evaluating online teaching. The authors describe development, evaluation, and utility of a new peer evaluation form for formative assessment of online teaching deemed relevant, sound, feasible, and beneficial.

  14. Empirical evaluation of H.265/HEVC-based dynamic adaptive video streaming over HTTP (HEVC-DASH)

    Science.gov (United States)

    Irondi, Iheanyi; Wang, Qi; Grecos, Christos

    2014-05-01

    Real-time HTTP streaming has gained global popularity for delivering video content over Internet. In particular, the recent MPEG-DASH (Dynamic Adaptive Streaming over HTTP) standard enables on-demand, live, and adaptive Internet streaming in response to network bandwidth fluctuations. Meanwhile, emerging is the new-generation video coding standard, H.265/HEVC (High Efficiency Video Coding) promises to reduce the bandwidth requirement by 50% at the same video quality when compared with the current H.264/AVC standard. However, little existing work has addressed the integration of the DASH and HEVC standards, let alone empirical performance evaluation of such systems. This paper presents an experimental HEVC-DASH system, which is a pull-based adaptive streaming solution that delivers HEVC-coded video content through conventional HTTP servers where the client switches to its desired quality, resolution or bitrate based on the available network bandwidth. Previous studies in DASH have focused on H.264/AVC, whereas we present an empirical evaluation of the HEVC-DASH system by implementing a real-world test bed, which consists of an Apache HTTP Server with GPAC, an MP4Client (GPAC) with open HEVC-based DASH client and a NETEM box in the middle emulating different network conditions. We investigate and analyze the performance of HEVC-DASH by exploring the impact of various network conditions such as packet loss, bandwidth and delay on video quality. Furthermore, we compare the Intra and Random Access profiles of HEVC coding with the Intra profile of H.264/AVC when the correspondingly encoded video is streamed with DASH. Finally, we explore the correlation among the quality metrics and network conditions, and empirically establish under which conditions the different codecs can provide satisfactory performance.

  15. Multibarrier waste forms. Part II. Characterization and evaluation.

    Energy Technology Data Exchange (ETDEWEB)

    Rusin, J.M.; Gray, W.J.; Wald, J.W.

    1979-08-01

    The multibarrier concept for the storage of radioactive waste is to use up to three barriers to isolate radionuclides from the environment: a solidified waste inner core, an impervious coating, and a metal matrix. The four multibarrier waste forms were evaluated for thermal stability (volatility), mechanical strength (impact resistance), and leach resistance. This report discusses the characterization of the multibarrier waste forms and compares them to reference calcine and glass waste forms. The weight loss of supercalcine-ceramics after 4 h in dry air ranges between 0.01 and 1.6 wt % from 1000 to 1200/sup 0/C and is dependent upon composition. Glass marbles in a cast lead alloy offer approximately an order of magnitude decease in the wt % fines < 37 ..mu..m released after impact as compared to a glass monolith. CVD-coated supercalcine in a sintered 410 SS matrix offers up to two orders of magnitude decrease. Hot-pressed supercalcine ceramics may offer no increase in impact resistance or leach resistance over that of a glass monolith. Supercalcine may offer no advantage over waste glasses in leach resistance. Glass and PyC/Al/sub 2/O/sub 3/ coatings provide effective inert leaching barriers.

  16. Preparation and evaluation of a novel dosage form for onychomycosis.

    Science.gov (United States)

    Laffleur, Flavia; Ataii, Martin

    2017-02-25

    Onychomycosis is a common infection of the nail caused by dermatophyte affecting mostly toenails in adults being associated with limited treatment options. In this study novel dosage forms were prepared and evaluated for their suitability in treatment of onychomycosis. Films were prepared comprising polymeric excipients such as chitosan, (hydroxypropyl)methyl cellulose, hydroxyethyl-cellulose, carboxymethylcellulose according to solvent evaporation method. Developed formulations were evaluated in terms of physical appearance, stability and adhesiveness. Furthermore skin and nail irritation studies were conducted. Five potential formulations (F1-F5) were designed while F1 and F4 exhibited the most promising results in terms of stability with 26min and 40.67min, respectively, and suitability in nail application. F1 as the most favorable dosage form revealed with 2.9438kg/m/s in terms of adhesive force the most adhesive properties in contrast to the other preparations. All formulations were found to be non-skin irritating and safe to use. Taken together, these findings suggest novel designed films containing polymeric excipients as a fruitful platform for the treatment in onychomycosis. Copyright © 2016 Elsevier B.V. All rights reserved.

  17. Evaluating the MBTI® Form M in a South African context

    Directory of Open Access Journals (Sweden)

    Casper J.J. van Zyl

    2012-01-01

    Full Text Available Orientation: Psychological instruments require continued refinement, updating and evaluation.Research purpose: To investigate the reliability, validity and differential item functioning of the MBTI® Form M across groups in South Africa using Classical Test Theory (CTT and Item Response Theory (IRT methods.Motivation for the study: To add to the continual research and improvement of the MBTI® Form M through the investigation of its psychometric properties across groups in South Africa.Research design, approach and method: This study falls within the quantitative research paradigm. Classical test theory methods and Rasch analysis were used to evaluate the functioning of the MBTI Form M across gender and ethnic groups. A cross-sectional study was completed consisting of 10 705 South African respondents.Main findings: Excellent reliability was found for the instrument across groups in the sample. Good evidence for construct validity was found using exploratory factor analysis and confirmatory factor analysis. Some evidence for uniform bias was found across ethnic and gender groups and a few items reflected non-uniform DIF across gender groups only. The effect of uniform and non-uniform DIF did not appear to have major practical implications for the interpretation of the scales.Practical/managerial implications: The results provided evidence that supports the psychometric validity of the MBTI instrument in the South African context.Contribution/value-add: This study is the largest study to date regarding the psychometric functioning of the MBTI instrument in South Africa. It contributes to the evolution of the instrument in line with the legislative requirements concerning the use of psychometric tests in South Africa. 

  18. An evaluation of the benefits and challenges of video consulting between general practitioners and residential aged care facilities.

    Science.gov (United States)

    Wade, Victoria; Whittaker, Frank; Hamlyn, Jeremy

    2015-12-01

    This research evaluated a project that provided video consultations between general practitioners (GPs) and residential aged care facilities (RACFs), with the aim of enabling faster access to medical care and avoidance of unnecessary hospital transfers. GPs were paid for video consultations at a rate equivalent to existing insurance reimbursement for supporting telehealth services. Evaluation data were gathered by direct observation at the project sites, semi-structured interviews and video call data from the technical network. Three pairs of general practices and RACFs were recruited to the project. 40 video consultations eligible for payment occurred over a 6 month period, three of which were judged to have avoided hospital attendance. The process development and change management aspects of the project required substantially more effort than was anticipated. This was due to problems with RACF technical infrastructure, the need for repeated training and awareness raising in RACFs, the challenge of establishing new clinical procedures, the short length of the project and broader difficulties in the relationships between GPs and RACFs. Video consulting between GPs and RACFs was clinically useful and avoided hospital attendance on a small scale, but further focus on process development is needed to embed this as a routine method of service delivery. © The Author(s) 2015.

  19. Instant replay: Evaluation of instant video feedback in surgical novices for a laparoscopic gallbladder dissection.

    Science.gov (United States)

    Farooq, Ameer; Reso, Artan; Harvey, Adrian

    2018-01-25

    Athletes often use video to improve their technique. We hypothesized that surgical novices given feedback using video-replay would outperform surgical novices given verbal feedback in the performance of a laparoscopic task. Our study used a prospective, randomized control design. The surgical task involved the laparoscopic dissection of a pig gallbladder. Our participants performed a dissection, pre- and post-traditional or video feedback. Each recording was independently scored by two staff surgeons using the previously validated rating tools. There was no significant difference between video feedback or traditional feedback groups in their mean overall or task specific scores. Both traditional and video-feedback groups had a trend towards improved performance post-feedback. No significant difference in performance by both our global assessment metrics or task-specific metrics was observed. Video feedback requires further study to investigate its impact on surgical training. Copyright © 2018 Elsevier Inc. All rights reserved.

  20. Video teaching program on management of colostomy: Evaluation of its impact on caregivers

    Directory of Open Access Journals (Sweden)

    Heena Dabas

    2016-01-01

    Full Text Available Context: Care of a child having colostomy has not been institutionalized for a long time for economic and administrative reasons. After stoma formation, stoma care has to be provided to the child by caregivers at home. Hence, caregivers need to be provided with ongoing education and support, commencing from preoperative teaching to discharge from the hospital and home care. Aims: The aims of this study were to develop video-based learning resource material and to evaluate its effectiveness in terms of knowledge and skill attainment by caregivers. Settings and Design: The study design was time series, one group pretest and post test. This was conducted among 30 caregivers attending pediatric surgery outpatients and indoor departments of a tertiary level care center. Materials and Methods: A video teaching program (VTP related to pediatric colostomy was developed and used to teach the caregivers about colostomy care. Pretested and validated knowledge questionnaire, observational checklist, and stoma assessment scale (SAS were used to assess the knowledge and skills of caregivers before and after the administration of VTP immediately (post test 1 after and 2 weeks (post test 2 after the intervention. Statistical Analysis Used: Repeated measures analysis of variance (ANOVA, Bonferroni correction, Mann-Whitney U test, and Kruskal-Wallis test were used. Results: There were significant increases in knowledge (from 10.9 ± 2.5 to 16.4 ± 1.67 and 15.9 ± 4.02, P = 0.001, maximum score 20 and skill scores as assessed by the observation checklist (from 5.6 ± 2.0 to 9.8 ± 1.6 and 8.6 ± 2.1, P = 0.001, maximum score 12 immediately after and 2 weeks after the VTP. However, a decline in skills was observed at 2 weeks when compared with immediate scores, as measured by the observation checklist. There was no significant increase in the skill scores of caregivers as measured by SAS at 2 weeks compared to the immediate scores. Conclusion: The VTP was

  1. Video teaching program on management of colostomy: Evaluation of its impact on caregivers

    Science.gov (United States)

    Dabas, Heena; Sharma, Kamlesh Kumari; Joshi, Poonam; Agarwala, Sandeep

    2016-01-01

    Context: Care of a child having colostomy has not been institutionalized for a long time for economic and administrative reasons. After stoma formation, stoma care has to be provided to the child by caregivers at home. Hence, caregivers need to be provided with ongoing education and support, commencing from preoperative teaching to discharge from the hospital and home care. Aims: The aims of this study were to develop video-based learning resource material and to evaluate its effectiveness in terms of knowledge and skill attainment by caregivers. Settings and Design: The study design was time series, one group pretest and post test. This was conducted among 30 caregivers attending pediatric surgery outpatients and indoor departments of a tertiary level care center. Materials and Methods: A video teaching program (VTP) related to pediatric colostomy was developed and used to teach the caregivers about colostomy care. Pretested and validated knowledge questionnaire, observational checklist, and stoma assessment scale (SAS) were used to assess the knowledge and skills of caregivers before and after the administration of VTP immediately (post test 1) after and 2 weeks (post test 2) after the intervention. Statistical Analysis Used: Repeated measures analysis of variance (ANOVA), Bonferroni correction, Mann–Whitney U test, and Kruskal–Wallis test were used. Results: There were significant increases in knowledge (from 10.9 ± 2.5 to 16.4 ± 1.67 and 15.9 ± 4.02, P = 0.001, maximum score 20) and skill scores as assessed by the observation checklist (from 5.6 ± 2.0 to 9.8 ± 1.6 and 8.6 ± 2.1, P = 0.001, maximum score 12) immediately after and 2 weeks after the VTP. However, a decline in skills was observed at 2 weeks when compared with immediate scores, as measured by the observation checklist. There was no significant increase in the skill scores of caregivers as measured by SAS at 2 weeks compared to the immediate scores. Conclusion: The VTP was effective in

  2. Comprehensive Analysis and Evaluation of Background Subtraction Algorithms for Surveillance Video

    National Research Council Canada - National Science Library

    Yan Feng; Shengmei Luo; Yumin Tian; Shuo Deng; Haihong Zheng

    2014-01-01

    .... Then, the algorithms were implemented and tested using different videos with ground truth, such as baseline, dynamic background, camera jitter, and intermittent object motion and shadow scenarios...

  3. Designing usable web forms- Empirical evaluation of web form improvement guidelines

    DEFF Research Database (Denmark)

    Seckler, Mirjam; Heinz, Silvia; Bargas-Avila, Javier A.

    2014-01-01

    This study reports a controlled eye tracking experiment (N = 65) that shows the combined effectiveness of 20 guidelines to improve interactive online forms when applied to forms found on real company websites. Results indicate that improved web forms lead to faster completion times, fewer form...... submission trials, and fewer eye movements. Data from subjective questionnaires and interviews further show increased user satisfaction. Overall, our findings highlight the importance for web designers to improve their web forms using UX guidelines....

  4. A methodology to evaluate the effect of video compression on the performance of analytics systems

    Science.gov (United States)

    Tsifouti, Anastasia; Nasralla, Moustafa M.; Razaak, Manzoor; Cope, James; Orwell, James M.; Martini, Maria G.; Sage, Kingsley

    2012-10-01

    The Image Library for Intelligent Detection Systems (i-LIDS) provides benchmark surveillance datasets for analytics systems. This paper proposes a methodology to investigate the effect of compression and frame-rate reduction, and to recommend an appropriate suite of degraded datasets for public release. The library consists of six scenarios, including Sterile Zone (SZ) and Parked Vehicle (PV), which are investigated using two different compression algorithms (H.264 and JPEG) and a number of detection systems. PV has higher spatio-temporal complexity than the SZ. Compression performance is dependent on scene content hence PV will require larger bit-streams in comparison with SZ, for any given distortion rate. The study includes both industry standard algorithms (for transmission) and CCTV recorders (for storage). CCTV recorders generally use proprietary formats, which may significantly affect the visual information. Encoding standards such as H.264 and JPEG use the Discrete Cosine Transform (DCT) technique, which introduces blocking artefacts. The H.264 compression algorithm follows a hybrid predictive coding approach to achieve high compression gains, exploiting both spatial and temporal redundancy. The highly predictive approach of H.264 may introduce more artefacts resulting in a greater effect on the performance of analytics systems than JPEG. The paper describes the two main components of the proposed methodology to measure the effect of degradation on analytics performance. Firstly, the standard tests, using the `f-measure' to evaluate the performance on a range of degraded video sets. Secondly, the characterisation of the datasets, using quantification of scene features, defined using image processing techniques. This characterization permits an analysis of the points of failure introduced by the video degradation.

  5. Correlation between two-dimensional video analysis and subjective assessment in evaluating knee control among elite female team handball players

    DEFF Research Database (Denmark)

    Stensrud, Silje; Myklebust, Grethe; Kristianslund, Eirik

    2011-01-01

    . The present study investigated the correlation between a two-dimensional (2D) video analysis and subjective assessment performed by one physiotherapist in evaluating knee control. We also tested the correlation between three simple clinical tests using both methods. A cohort of 186 female elite team handball...

  6. The Development and Evaluation of a Video-Tape Protocol for the Examination of Multicapped Deaf-Blind Children.

    Science.gov (United States)

    Donlon, Edward T.; Curtis, W. Scott

    Due to the belief that written communication about a deaf blind child among professional examiners and treatment agencies can be more accurate and precise, the experimenters developed and evaluated a video tape protocol for the examination of the communication skills of 20 multiply handicapped deaf blind children, who ranged from 3 to 8 years in…

  7. Baby FaceTime: Can Toddlers Learn from Online Video Chat?

    Science.gov (United States)

    Myers, Lauren J.; LeWitt, Rachel B.; Gallo, Renee E.; Maselli, Nicole M.

    2017-01-01

    There is abundant evidence for the "video deficit": children under 2 years old learn better in person than from video. We evaluated whether these findings applied to video chat by testing whether children aged 12-25 months could form relationships with and learn from on-screen partners. We manipulated social contingency: children…

  8. A Study of Behavioral Change in 50 Severely Multi-Sensorily Handicapped Children Through Application of the Video-Tape Recorded Behavioral Evaluation Protocol. Final Report.

    Science.gov (United States)

    Curtis, W. Scott

    Examined with 49 deaf-blind children (under 9 years old) was the use of the Telediagnostic Behavior Evaluation Protocol, a video-tape recorded evaluation protocol. To further develop the Telediagnostic Protocol and delineate the characteristics of the Ss observed during the process of test development, Ss were video-taped in eight 3-minute…

  9. Through the looking glass of a chemistry video game: Evaluating the effects of different MLEs presenting identical content material

    Science.gov (United States)

    Hillman, Dustin S.

    The primary goal of this study is to evaluate the effects of different media-based learning environments (MLEs) that present identical chemistry content material. This is done with four different MLEs that utilize some or all components of a chemistry-based media-based prototype video game. Examination of general chemistry student volunteers purposefully randomized to one of four different MLEs did not provide evidence that the higher the level of interactivity resulted in a more effective MLE for the chemistry content. Data suggested that the cognitive load to play the chemistry-based video game may impaired the chemistry content being presented and recalled by the students while the students watching the movie of the chemistry-based video game were able to recall the chemistry content more efficiently. Further studies in this area need to address the overall cognitive load of the different MLEs to potentially better determine what the most effective MLE may be for this chemistry content.

  10. An Evaluation of OCLC's EPIC as a Resource for Subject Access to Videos.

    Science.gov (United States)

    Palmer, Joseph W.

    1992-01-01

    An examination of OCLC's EPIC service and standard video reference tools revealed that EPIC was more comprehensive in finding video titles on the popular or specialized topics of bonsai, genealogy, karate, and holography, because of its keyword searching ability on the massive OCLC database. (11 references) (EA)

  11. Using Student Learning and Development Outcomes to Evaluate a First-Year Undergraduate Group Video Project

    Science.gov (United States)

    Jensen, Murray; Mattheis, Allison; Johnson, Brady

    2012-01-01

    Students in an interdisciplinary undergraduate introductory course were required to complete a group video project focused on nutrition and healthy eating. A mixed-methods approach to data collection involved observing and rating video footage of group work sessions and individual and focus group interviews. These data were analyzed and used to…

  12. Questioning, Promoting and Evaluating the Use of Streaming Video To Support Student Learning.

    Science.gov (United States)

    Shephard, Kerry

    2003-01-01

    Uses case studies to describe how streaming video is currently used to support student learning in post-compulsory education in the United Kingdom. Describes the current role of streaming video and identifies processes that could extend the application of streaming in education. Identifies elements of a research agenda that could further develop…

  13. Video in Distance Education: ITFS vs. Web-Streaming--Evaluation of Student Attitudes

    Science.gov (United States)

    Reisslein, Jana; Seeling, Patrick; Reisslein, Martin

    2005-01-01

    The use of video in distance education courses has a long tradition, with many colleges and universities having been delivering distance education courses with video since the 80's using the Instructional Television Fixed Service (ITFS) and cable television. With the emergence of the Internet and the increased access bandwidths from private homes…

  14. TRECVID: evaluating the effectiveness of information retrieval tasks on digital video

    NARCIS (Netherlands)

    Smeaton, A.F.; Over, P.; Kraaij, W.

    2004-01-01

    TRECVID is an annual exercise which encourages research in information retrieval from digital video by providing a large video test collection, uniform scoring procedures, and a forum for organizations interested in comparing their results. TRECVID benchmarking covers both interactive and manual

  15. Impact Evaluation of FACTS & Feelings: A Home-Based Video Sex Education Curriculum.

    Science.gov (United States)

    Miller, Brent C.; And Others

    1993-01-01

    Families (n=548) with seventh- or eighth-grade adolescents were randomly assigned to receive videotape sex education curriculum including videos with mailed newsletters, videos without newsletters, or neither (control group). Found no significant effect of the program on key outcome variables of teenagers' sexual intentions or behaviors.…

  16. Biocompatibility evaluation of magnetosomes formed by Acidithiobacillus ferrooxidans

    Energy Technology Data Exchange (ETDEWEB)

    Yan Lei [Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, 730000 (China); College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, 163319 (China); Yue Xiaoxuan [Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, 730000 (China); Zhang Shuang [College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, 163319 (China); Chen Peng [Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, 730000 (China); GIBT, Gansu Institute of Business and Technology, Yannan Road 18, Lanzhou, 730010 (China); Xu Zhiliang; Li Yang [Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, 730000 (China); Li Hongyu, E-mail: hekouyanlei@gmail.com [Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, 730000 (China)

    2012-10-01

    Magnetite nanocrystal has been extensively used in biomedical field. Currently, an interesting alternative to synthetic magnetic Fe{sub 3}O{sub 4} nanoparticles, called magnetosome, has been found in magnetotactic bacteria. It has been reported that Acidithiobacillus ferrooxidans (At. ferrooxidans) has a potential to synthesize magnetosome. In this study, transmission electron microscope (TEM) was used to analyze the magnetite particles in At. ferrooxidans BY-3. The magnetosomes formed by this bacterium were isolated by a method combining ultracentrifugation and magnetic separation. Crystalline phase and surface functional group of the magnetosomes were investigated by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), respectively. Biocompatibility of the magnetosomes was systematically evaluated at various concentrations (0.5, 1.0, 2.0 and 4.0 mg/ml). MTT test, hemolysis assay and Micronucleus Test were carried out to evaluate in vitro cytotoxicity, blood toxicity and genotoxicity of magnetosomes, respectively. Under these conditions, magnetosomes showed no cytotoxic, genotoxic and hemolytic effects up to 4.0 mg/ml indicating good biocompatibility of these biological nanoparticles. These revealed that the magnetosomes might have a potential for biotechnological and biomedical applications in the future. - Highlights: Black-Right-Pointing-Pointer The production of magnetosomes from At. ferrooxidans has been easily available. Black-Right-Pointing-Pointer Several techniques are used to characterize properties of the magnetosomes. Black-Right-Pointing-Pointer The magnetosomes have no cytotoxicity, no hemolysis activity and no genotoxicity.

  17. Evaluation of Quantitative Head Impulse Testing Using Search Coils Versus Video-oculography in Older Individuals

    Science.gov (United States)

    Agrawal, Yuri; Schubert, Michael C.; Migliaccio, Americo A.; Zee, David S.; Schneider, Erich; Lehnen, Nadine; Carey, John P.

    2015-01-01

    Objective To evaluate the validity of 2D video-oculography (VOG) compared with scleral search coils for horizontal AVOR gain estimation in older individuals. Study Design Cross-sectional validation study. Setting Tertiary care academic medical center. Patients Six individuals age 70 and older. Interventions Simultaneous eye movement recording with scleral search coil (over right eye) and EyeSeeCam VOG camera (over left eye) during horizontal head impulses. Main Outcome Measures Best estimate search coil and VOG horizontal AVOR gain, presence of compensatory saccades using both eye movement recording techniques. Results We observed a significant correlation between search coil and VOG best estimate horizontal AVOR gain (r = 0.86, p = 0.0002). We evaluated individual head impulses and found that the shapes of the head movement and eye movement traces from the coil and VOG systems were similar. Specific features of eye movements seen in older individuals, including overt and covert corrective saccades and anticompensatory eye movements, were captured by both the search coil and VOG systems. Conclusion These data suggest that VOG is a reasonable proxy for search coil eye movement recording in older subjects to estimate VOR gain and the approximate timing of corrective eye movements. VOG offers advantages over the conventional search coil method; it is portable and easy to use, allowing for quantitative VOR estimation in diverse settings such as a routine office-based practice, at the bedside, and potentially in larger scale population analyses. PMID:24080977

  18. Using the Patient Centered Observation Form: Evaluation of an online training program.

    Science.gov (United States)

    Keen, Misbah; Cawse-Lucas, Jeanne; Carline, Jan; Mauksch, Larry

    2015-06-01

    The Patient Centered Observation Form (PCOF) helps trainees identify and describe specific communication skills and enhance self-awareness about skill use. We studied the effectiveness and ease of use of the Improving Communication Assessment Program (ICAP), an online module that prepares trainees to use the PCOF. Students, residents and medical educators viewed two videos (common and better skill use) of the same interaction and rated each video using the PCOF. Video sequence was randomized. We assessed agreement with experts, ease of use, concepts learned, and areas of confusion. Trainees (211) achieved strong agreement (.83) with experts and were highly satisfied (mean 4.18 out of 5). Viewing the common video first produced higher agreement (.87 vs .79; ES=.4) with experts and greater satisfaction (4.36 vs 4.02, ES .4) than viewing the better video first. Trainees reported diverse areas of learning and minimal confusion. ICAP training to use the PCOF may facilitate teaching and assessment of communication skills and enrich training through peer observation and feedback. We offer several educational strategies. Learning to use the PCOF via the ICAP module may accelerate communication training for medical students, residents, medical educators and practicing clinicians. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  19. On metrics for objective and subjective evaluation of high dynamic range video

    Science.gov (United States)

    Minoo, Koohyar; Gu, Zhouye; Baylon, David; Luthra, Ajay

    2015-09-01

    In high dynamic range (HDR) video, it is possible to represent a wider range of intensities and contrasts compared to the current standard dynamic range (SDR) video. HDR video can simultaneously preserve details in very bright and very dark areas of a scene whereas these details become lost or washed out in SDR video. Because the perceived quality due to this increased fidelity may not fit the same model of perceived quality in the SDR video, it is not clear whether the objective metrics that have been widely used and studied for SDR visual experience are reasonably accurate for HDR cases, in terms of correlation with subjective measurement for HDR video quality. This paper investigates several objective metrics and their correlation to subjective quality for a variety of HDR video content. Results are given for the case of HDR content compressed at different bit rates. In addition to rating the relevance of each objective metric in terms of its correlation to the subjective measurements, comparisons are also presented to show how closely different objective metrics can predict the results obtained by subjective quality assessment in terms of coding efficiency provided by different coding processes.

  20. Experimental Evaluation of Auditory Cognition's Effects on Visual Cognition of Video

    Science.gov (United States)

    Kamitani, Tatsuo; Haruki, Kazuhito; Matsuda, Minoru

    This paper presents the experimental evaluation of auditory cognition's effects on visual cognition of video. The influences of seven auditory stimuli on visual recognition are investigated based on experimental data of key-down operations. The key-down operations for locating a moving target by visual and auditory images are monitored by an experiment system originally made by devices including VTR, CRT, Data Recorder, etc.. Regression analysis and EM algorithm are applied to analyzing the experiment data of 350 key-down operations, made with 50 people and 7 auditory stimulus types. The following characteristic results about the influence of auditory stimulus on visual recognition are derived. Firstly, seven people responded too early for every experiment. The average of and the standard deviation of their response times are 439[ms] and 231[ms] respectively. Secondly, the other forty three people responded about 10[ms] after at cases, in which auditory images were presented 30[ms] or 60[ms] before visual images. Also they responded about 10[ms] early at the other cases. Thirdly, as the visual image was dominant information used for the key-down decision making, apparent effects of auditory images on the key-down operation were not measured. Averages and standard deviations of distributions measured by EM algorithm, regarding to 7 auditory stimulus types, are considered and verified with the Card's MHP model of human response.

  1. Diagnostic value and prognostic evaluation of dynamic video-electroencephalogram monitoring in children with epilepsy

    Science.gov (United States)

    Wu, Xiaobo; Su, Ying; Liu, Wei; Jia, Xiaoyu; Zhang, Yanling; Zhang, Xinyang; Wang, Guilan

    2017-01-01

    The diagnostic and prognostic value of dynamic video-electroencephalogram (V-EEG) monitoring in children with epilepsy were investigated. From February 2014 to February 2016, in total 200 children with epilepsy were selected during their stay in the First Hospital of Qinghuangdao and were randomly allocated to a dynamic and a conventional V-EEG monitoring group (n=100). The detection rate of epileptiform discharges in the two groups was evaluated. The V-EEG monitoring index was used to select treatment methods for patients with epilepsy. After 3 months, the patients were rechecked. Disease features and incidence of epilepsy were recorded. There were no significant differences in the course of disease, seizure frequency and age between the two groups (P>0.05). The detection rate of epileptiform discharges in the dynamic V-EEG was significantly higher than in the routine monitoring group (P<0.01). The accuracy and specificity of monitoring in the V-EEG were significantly higher than in the routine monitoring group (P<0.01). Seizure frequency and number of epilepsy attacks in patients in the V-EEG group were significantly lower than in the routine monitoring group (P<0.01). Dynamic V-EEG can improve epilepsy detection rate. The high accuracy and specificity of dynamic V-EEG suggest that it may be of great clinical value in the diagnosis and prognosis of epilepsy. PMID:28962191

  2. Diagnostic value and prognostic evaluation of dynamic video-electroencephalogram monitoring in children with epilepsy.

    Science.gov (United States)

    Wu, Xiaobo; Su, Ying; Liu, Wei; Jia, Xiaoyu; Zhang, Yanling; Zhang, Xinyang; Wang, Guilan

    2017-09-01

    The diagnostic and prognostic value of dynamic video-electroencephalogram (V-EEG) monitoring in children with epilepsy were investigated. From February 2014 to February 2016, in total 200 children with epilepsy were selected during their stay in the First Hospital of Qinghuangdao and were randomly allocated to a dynamic and a conventional V-EEG monitoring group (n=100). The detection rate of epileptiform discharges in the two groups was evaluated. The V-EEG monitoring index was used to select treatment methods for patients with epilepsy. After 3 months, the patients were rechecked. Disease features and incidence of epilepsy were recorded. There were no significant differences in the course of disease, seizure frequency and age between the two groups (P>0.05). The detection rate of epileptiform discharges in the dynamic V-EEG was significantly higher than in the routine monitoring group (Pmonitoring in the V-EEG were significantly higher than in the routine monitoring group (Pmonitoring group (P<0.01). Dynamic V-EEG can improve epilepsy detection rate. The high accuracy and specificity of dynamic V-EEG suggest that it may be of great clinical value in the diagnosis and prognosis of epilepsy.

  3. VBR video traffic models

    CERN Document Server

    Tanwir, Savera

    2014-01-01

    There has been a phenomenal growth in video applications over the past few years. An accurate traffic model of Variable Bit Rate (VBR) video is necessary for performance evaluation of a network design and for generating synthetic traffic that can be used for benchmarking a network. A large number of models for VBR video traffic have been proposed in the literature for different types of video in the past 20 years. Here, the authors have classified and surveyed these models and have also evaluated the models for H.264 AVC and MVC encoded video and discussed their findings.

  4. Reward system and temporal pole contributions to affective evaluation during a first person shooter video game

    National Research Council Canada - National Science Library

    Mathiak, Krystyna A; Klasen, Martin; Weber, René; Ackermann, Hermann; Shergill, Sukhwinder S; Mathiak, Klaus

    2011-01-01

    .... It was demonstrated that playing a video game leads to striatal dopamine release. It is unclear, however, which aspects of the game cause this reward system activation and if violent content contributes...

  5. Evaluation of MPEG-4 video streaming over UMTS/WCDMA dedicated channels

    NARCIS (Netherlands)

    Lo, Anthony; Heijenk, Geert; Niemegeers, I.G.M.M.

    2005-01-01

    Universal Mobile Telecommunications System (UMTS) is a third-generation mobile communication system that supports wireless wideband multimedia communications. This paper investigates the performance of streaming MPEG-4 video over UMTS dedicated channels with varying channel conditions. In order to

  6. Tailoring a video-feedback intervention for sensitive discipline to parents with intellectual disabilities: a process evaluation.

    Science.gov (United States)

    Hodes, Marja W; Meppelder, H Marieke; Schuengel, Carlo; Kef, Sabina

    2014-01-01

    Parenting support programs for the general population may not be effective for parents with intellectual disabilities (ID). A videobased intervention program based on attachment and coercion theory (Video-feedback Intervention to promote Positive Parenting with additional focus on Sensitive Discipline; VIPP-SD) was tailored to parents with ID and the implementation of the adapted program was evaluated by the home visitors conducting the program. Home visitors (N = 17) of 36 families rated the intervention process during each session. Home visitors' evaluations showed a significant increase in positive ratings of parents' easiness to work with, amenability to influence, and openness. Cooperation remained stable. A case example illustrated this process, showing how feedback using video facilitated changes in the perceptions and attributions of a mother with mild ID.

  7. Cross-platform digital assessment forms for evaluating surgical skills

    DEFF Research Database (Denmark)

    Andersen, Steven Arild Wuyts

    2015-01-01

    assessment situations. In this paper, we report on the development of cross-platform digital assessment forms for use with multiple raters in order to facilitate the automatic processing of surgical skills assessments that include structured ratings. The FileMaker 13 platform was used to create a database...... containing the digital assessment forms, because this software has cross-platform functionality on both desktop computers and handheld devices. The database is hosted online, and the rating forms can therefore also be accessed through most modern web browsers. Cross-platform digital assessment forms were...... developed for the rating of surgical skills. The database platform used in this study was reasonably priced, intuitive for the user, and flexible. The forms have been provided online as free downloads that may serve as the basis for further development or as inspiration for future efforts. In conclusion...

  8. EUS Needle Identification Comparison and Evaluation study (with videos).

    Science.gov (United States)

    Tang, Shou-Jiang; Vilmann, Andreas S; Saftoiu, Adrian; Wang, Wanmei; Streba, Costin Teodor; Fink, Peter P; Griswold, Michael; Wu, Ruonan; Dietrich, Christoph F; Jenssen, Christian; Hocke, Michael; Kantowski, Marcus; Pohl, Jürgen; Fockens, Paul; Annema, Jouke T; van der Heijden, Erik H F M; Havre, Roald Flesland; Pham, Khanh Do-Cong; Kunda, Rastislav; Deprez, Pierre H; Mariana, Jinga; Vazquez-Sequeiros, Enrique; Larghi, Alberto; Buscarini, Elisabetta; Fusaroli, Pietro; Lahav, Maor; Puri, Rajesh; Garg, Pramod Kumar; Sharma, Malay; Maluf-Filho, Fauze; Sahai, Anand; Brugge, William R; Lee, Linda S; Aslanian, Harry R; Wang, Andrew Y; Shami, Vanessa M; Markowitz, Arnold; Siddiqui, Ali A; Mishra, Girish; Scheiman, James M; Isenberg, Gerard; Siddiqui, Uzma D; Shah, Raj J; Buxbaum, James; Watson, Rabindra R; Willingham, Field F; Bhutani, Manoop S; Levy, Michael J; Harris, Cynthia; Wallace, Michael B; Nolsøe, Christian Pállson; Lorentzen, Torben; Bang, Niels; Sørensen, Sten Mellerup; Gilja, Odd Helge; D'Onofrio, Mirko; Piscaglia, Fabio; Gritzmann, Norbert; Radzina, Maija; Sparchez, Zeno Adrian; Sidhu, Paul S; Freeman, Simon; McCowan, Timothy C; de Araujo, Cyrillo Rodrigues; Patel, Akash; Ali, Mohammad Adel; Campbell, Garth; Chen, Edward; Vilmann, Peter

    2016-09-01

    EUS-guided FNA or biopsy sampling is widely practiced. Optimal sonographic visualization of the needle is critical for image-guided interventions. Of the several commercially available needles, bench-top testing and direct comparison of these needles have not been done to reveal their inherent echogenicity. The aims are to provide bench-top data that can be used to guide clinical applications and to promote future device research and development. Descriptive bench-top testing and comparison of 8 commonly used EUS-FNA needles (all size 22 gauge): SonoTip Pro Control (Medi-Globe); Expect Slimline (Boston Scientific); EchoTip, EchoTip Ultra, EchoTip ProCore High Definition (Cook Medical); ClearView (Conmed); EZ Shot 2 (Olympus); and BNX (Beacon Endoscopic), and 2 new prototype needles, SonoCoat (Medi-Globe), coated by echogenic polymers made by Encapson. Blinded evaluation of standardized and unedited videos by 43 EUS endoscopists and 17 radiologists specialized in GI US examination who were unfamiliar with EUS needle devices. There was no significant difference in the ratings and rankings of these needles between endosonographers and radiologists. Overall, 1 prototype needle was rated as the best, ranking 10% to 40% higher than all other needles (P < .01). Among the commercially available needles, the EchoTip Ultra needle and the ClearView needle were top choices. The EZ Shot 2 needle was ranked statistically lower than other needles (30%-75% worse, P < .001). All FNA needles have their inherent and different echogenicities, and these differences are similarly recognized by EUS endoscopists and radiologists. Needles with polymeric coating from the entire shaft to the needle tip may offer better echogenicity. Copyright © 2016 American Society for Gastrointestinal Endoscopy. All rights reserved.

  9. Evaluating the MBTI® Form M in a South African context

    National Research Council Canada - National Science Library

    Casper J J van Zyl; Nicola Taylor

    2012-01-01

    .... This study aims to investigate the reliability, validity and differential item functioning of the MBTI Form M across groups in South Africa using Classical Test Theory and Item Response Theory methods...

  10. Measurement of neonatal abstinence syndrome: Evaluation of short forms.

    Science.gov (United States)

    Jones, Hendrée E; Seashore, Carl; Johnson, Elisabeth; Horton, Evette; O'Grady, Kevin E; Andringa, Kim

    2016-01-01

    1) How well do the short forms previously developed from the Maternal Opioid Treatment: Human Experimental Research (MOTHER) neonatal abstinence syndrome (NAS) scale (MNS) discriminate between neonates untreated and treated for NAS? (2) Can a short form be developed that is superior to other short forms in discriminating between the two groups? This secondary analysis study used data from 131 delivered neonates in the MOTHER study, a randomized controlled trial comparing neonatal and maternal outcomes in opioid-dependent pregnant women administered buprenorphine or methadone. Comprehensive care was provided at seven university hospitals. A 19-item instrument measuring neonatal abstinence signs. A five-item index proved superior to the previous indices (ps < 0.01) and discriminated between the treated and untreated NAS groups as well as did the MNS total score (p=0.09). A short form developed from the MNS shows promise as a possible screening measure.

  11. VQone MATLAB toolbox: A graphical experiment builder for image and video quality evaluations: VQone MATLAB toolbox.

    Science.gov (United States)

    Nuutinen, Mikko; Virtanen, Toni; Rummukainen, Olli; Häkkinen, Jukka

    2016-03-01

    This article presents VQone, a graphical experiment builder, written as a MATLAB toolbox, developed for image and video quality ratings. VQone contains the main elements needed for the subjective image and video quality rating process. This includes building and conducting experiments and data analysis. All functions can be controlled through graphical user interfaces. The experiment builder includes many standardized image and video quality rating methods. Moreover, it enables the creation of new methods or modified versions from standard methods. VQone is distributed free of charge under the terms of the GNU general public license and allows code modifications to be made so that the program's functions can be adjusted according to a user's requirements. VQone is available for download from the project page (http://www.helsinki.fi/psychology/groups/visualcognition/).

  12. Subjective rating and objective evaluation of the acoustic and indoor climate conditions in video conferencing rooms

    DEFF Research Database (Denmark)

    Hauervig-Jørgensen, Charlotte; Jeong, Cheol-Ho; Toftum, Jørn

    2017-01-01

    Today, face-to-face meetings are frequently replaced by video conferences in order to reduce costs and carbon footprint related to travels and to increase the company efficiency. Yet, complaints about the difficulty of understanding the speech of the participants in both rooms of the video...... conference occur. The aim of this study is to find out the main causes of difficulties in speech communication. Correlation studies between subjective perceptions were conducted through questionnaires and objective acoustic and indoor climate parameters related to video conferencing. Based on four single......-room and three combined-room measurements, it was found that the traditional measure of speech, such as the speech transmission index, was not correlated with the subjective classifications. Thus, a correlation analysis was conducted as an attempt to find the hidden factors behind the subjective perceptions...

  13. Performance Evaluations for Super-Resolution Mosaicing on UAS Surveillance Videos

    Directory of Open Access Journals (Sweden)

    Aldo Camargo

    2013-05-01

    Full Text Available Abstract Unmanned Aircraft Systems (UAS have been widely applied for reconnaissance and surveillance by exploiting information collected from the digital imaging payload. The super-resolution (SR mosaicing of low-resolution (LR UAS surveillance video frames has become a critical requirement for UAS video processing and is important for further effective image understanding. In this paper we develop a novel super-resolution framework, which does not require the construction of sparse matrices. The proposed method implements image operations in the spatial domain and applies an iterated back-projection to construct super-resolution mosaics from the overlapping UAS surveillance video frames. The Steepest Descent method, the Conjugate Gradient method and the Levenberg-Marquardt algorithm are used to numerically solve the nonlinear optimization problem for estimating a super-resolution mosaic. A quantitative performance comparison in terms of computation time and visual quality of the super-resolution mosaics through the three numerical techniques is presented.

  14. Evaluating the MBTI® Form M in a South African context

    National Research Council Canada - National Science Library

    Casper J.J. van Zyl; Nicola Taylor

    2012-01-01

    Orientation: Psychological instruments require continued refinement, updating and evaluation.Research purpose: To investigate the reliability, validity and differential item functioning of the MBTI...

  15. Functional neurotoxicity evaluation of noribogaine using video-EEG in cynomolgus monkeys.

    Science.gov (United States)

    Authier, Simon; Accardi, Michael V; Paquette, Dominique; Pouliot, Mylène; Arezzo, Joseph; Stubbs, R John; Gerson, Ronald J; Friedhoff, Lawrence T; Weis, Holger

    2016-01-01

    Continuous video-electroencephalographic (EEG) monitoring remains the gold standard for seizure liability assessments in preclinical drug safety assessments. EEG monitored by telemetry was used to assess the behavioral and EEG effects of noribogaine hydrochloride (noribogaine) in cynomolgus monkeys. Noribogaine is an iboga alkaloid being studied for the treatment of opioid dependence. Six cynomolgus monkeys (3 per gender) were instrumented with EEG telemetry transmitters. Noribogaine was administered to each monkey at both doses (i.e., 160 and 320mg/kg, PO) with an interval between dosing of at least 6days, and the resulting behavioral and EEG effects were evaluated. IV pentylenetetrazol (PTZ), served as a positive control for induced seizures. The administration of noribogaine at either of the doses evaluated was not associated with EEG evidence of seizure or with EEG signals known to be premonitory signs of increased seizure risk (e.g., sharp waves, unusual synchrony, shifts to high-frequency patterns). Noribogaine was associated with a mild reduction in activity levels, increased scratching, licking and chewing, and some degree of poor coordination and related clinical signs. A single monkey exhibited brief myoclonic movements that increased in frequency at the high dose, but which did not appear to generalize, cluster or to be linked with EEG abnormalities. Noribogaine was also associated with emesis and partial anorexia. In contrast, PTZ was associated with substantial pre-ictal EEG patterns including large amplitude, repetitive sharp waves leading to generalized seizures and to typical post-ictal EEG frequency attenuation. EEG patterns were within normal limits following administration of noribogaine at doses up to 320mg/kg with concurrent clinical signs that correlated with plasma exposures and resolved by the end of the monitoring period. PTZ was invariably associated with EEG paroxysmal activity leading to ictal EEG. In the current study, a noribogaine

  16. Repeated Low Teaching Evaluations: A Form of Habitual Behaviour?

    Science.gov (United States)

    Grayson, J. Paul

    2015-01-01

    Teaching evaluations have become part of life on Canadian campuses; however, there is no agreement among researchers as to their validity. In this article, comparisons were made between first- and third-year collective evaluations of professors' performance at the University of British Columbia, York University, and McGill University. Overall, it…

  17. Collaborative Video Sketching

    DEFF Research Database (Denmark)

    Henningsen, Birgitte; Gundersen, Peter Bukovica; Hautopp, Heidi

    2017-01-01

    This paper introduces to what we define as a collaborative video sketching process. This process links various sketching techniques with digital storytelling approaches and creative reflection processes in video productions. Traditionally, sketching has been used by designers across various...... forms and through empirical examples, we present and discuss the video recording of sketching sessions, as well as development of video sketches by rethinking, redoing and editing the recorded sessions. The empirical data is based on workshop sessions with researchers and students from universities...... and university colleges and primary and secondary school teachers. As researchers, we have had different roles in these action research case studies where various video sketching techniques were applied.The analysis illustrates that video sketching can take many forms, and two common features are important...

  18. Evaluation of request forms submitted to the haematology laboratory ...

    African Journals Online (AJOL)

    raoul

    2011-03-29

    Mar 29, 2011 ... A Six Sigma approach to the rate and clinical effect of registration errors in a laboratory. J Clin Pathol. 2010; 63 (5):434- 437. This article on PubMed. 9. Zemlin AE, Nutt L, Burgess CJ, Eiman F and Erasmus RT. Potential for medical error: incorrectly completed request forms for thyroid function tests limit ...

  19. Evaluation of metrology technologies for free form surfaces

    DEFF Research Database (Denmark)

    Arámbula, K.; Siller, H.R.; De Chiffre, Leonardo

    2012-01-01

    This research work describes a novel approach for comparing different technologies for free form surface metrology: computerized tomography (CT), photogrammetry and coordinate measuring machines (CMM). The comparison has the aim of providing relevant information for the selection of metrology...... also deals with costs issues, required standards, and necessary additional information when selecting inspection equipment....

  20. Evaluation of Microbiology Request Forms at a Tertiary Health ...

    African Journals Online (AJOL)

    Laboratory analytical errors were hitherto believed to be responsible for inaccurate investigation results. Recent findings have shown that with advances in analytical techniques, preanalytic factors are now responsible for most of the errors. We audited the Laboratory Request Forms, which were sent for microbiological ...

  1. Performance and Complexity Co-evaluation of the Advanced Video Coding Standard for Cost-Effective Multimedia Communications

    Science.gov (United States)

    Saponara, Sergio; Denolf, Kristof; Lafruit, Gauthier; Blanch, Carolina; Bormans, Jan

    2004-12-01

    The advanced video codec (AVC) standard, recently defined by a joint video team (JVT) of ITU-T and ISO/IEC, is introduced in this paper together with its performance and complexity co-evaluation. While the basic framework is similar to the motion-compensated hybrid scheme of previous video coding standards, additional tools improve the compression efficiency at the expense of an increased implementation cost. As a first step to bridge the gap between the algorithmic design of a complex multimedia system and its cost-effective realization, a high-level co-evaluation approach is proposed and applied to a real-life AVC design. An exhaustive analysis of the codec compression efficiency versus complexity (memory and computational costs) project space is carried out at the early algorithmic design phase. If all new coding features are used, the improved AVC compression efficiency (up to 50% compared to current video coding technology) comes with a complexity increase of a factor 2 for the decoder and larger than one order of magnitude for the encoder. This represents a challenge for resource-constrained multimedia systems such as wireless devices or high-volume consumer electronics. The analysis also highlights important properties of the AVC framework allowing for complexity reduction at the high system level: when combining the new coding features, the implementation complexity accumulates, while the global compression efficiency saturates. Thus, a proper use of the AVC tools maintains the same performance as the most complex configuration while considerably reducing complexity. The reported results provide inputs to assist the profile definition in the standard, highlight the AVC bottlenecks, and select optimal trade-offs between algorithmic performance and complexity.

  2. Performance and Complexity Co-evaluation of the Advanced Video Coding Standard for Cost-Effective Multimedia Communications

    Directory of Open Access Journals (Sweden)

    Saponara Sergio

    2004-01-01

    Full Text Available The advanced video codec (AVC standard, recently defined by a joint video team (JVT of ITU-T and ISO/IEC, is introduced in this paper together with its performance and complexity co-evaluation. While the basic framework is similar to the motion-compensated hybrid scheme of previous video coding standards, additional tools improve the compression efficiency at the expense of an increased implementation cost. As a first step to bridge the gap between the algorithmic design of a complex multimedia system and its cost-effective realization, a high-level co-evaluation approach is proposed and applied to a real-life AVC design. An exhaustive analysis of the codec compression efficiency versus complexity (memory and computational costs project space is carried out at the early algorithmic design phase. If all new coding features are used, the improved AVC compression efficiency (up to 50% compared to current video coding technology comes with a complexity increase of a factor 2 for the decoder and larger than one order of magnitude for the encoder. This represents a challenge for resource-constrained multimedia systems such as wireless devices or high-volume consumer electronics. The analysis also highlights important properties of the AVC framework allowing for complexity reduction at the high system level: when combining the new coding features, the implementation complexity accumulates, while the global compression efficiency saturates. Thus, a proper use of the AVC tools maintains the same performance as the most complex configuration while considerably reducing complexity. The reported results provide inputs to assist the profile definition in the standard, highlight the AVC bottlenecks, and select optimal trade-offs between algorithmic performance and complexity.

  3. Evaluating Intelligent Interfaces for Post-Editing Automatic Transcriptions of Online Video Lectures

    Science.gov (United States)

    Valor Miró, J. D.; Spencer, R. N.; Pérez González de Martos, A.; Garcés Díaz-Munío, G.; Turró, C.; Civera, J.; Juan, A.

    2014-01-01

    Video lectures are fast becoming an everyday educational resource in higher education. They are being incorporated into existing university curricula around the world, while also emerging as a key component of the open education movement. In 2007, the Universitat Politècnica de València (UPV) implemented its poliMedia lecture capture system for…

  4. Design, implementation and evaluation of a point cloud codec for Tele-Immersive Video

    NARCIS (Netherlands)

    R.N. Mekuria (Rufael); C.L. Blom (Kees); P.S. Cesar Garcia (Pablo Santiago)

    2017-01-01

    htmlabstractwe present a generic and real-time time-varying point cloud codec for 3D immersive video. This codec is suitable for mixed reality applications where 3D point clouds are acquired at a fast rate. In this codec, intra frames are coded progressively in an octree subdivision. To further

  5. Video-based self-assessment: implementation and evaluation in an undergraduate nursing course.

    Science.gov (United States)

    Yoo, M S; Son, Y J; Kim, Y S; Park, J H

    2009-08-01

    This research was performed to investigate the effects of video-based self-assessment on the ability of nursing students to accurately measure vital signs, their communication skills, and their satisfaction. This research was conducted between March 2007 and June 2007 as a quasi-experimental control-group, pretest-posttest design. The study population was composed of 40 second-year student nurses who enrolled in a fundamentals of nursing course of a college of nursing, Ajou University in Korea. Results of the research indicate that there was a statistically significant difference in exam scores for assessing long-term memory video-review group demonstrating higher scores. Student satisfaction was also significantly higher in the video-review group than in the control group. These results may suggest video-based self-assessment is a beneficial and effective instructional method of training undergraduate nursing students to develop awareness of their strengths and weaknesses, and to improve their clinical and communication skills.

  6. Evaluating the Evidence Base of Video Analysis: A Special Education Teacher Development Tool

    Science.gov (United States)

    Nagro, Sarah A.; Cornelius, Kyena E.

    2013-01-01

    Special education teacher development is continually studied to determine best practices for improving teacher quality and promoting student learning. Video analysis is commonly included in teacher development targeting both teacher thinking and practice intended to improve learning opportunities for students. Positive research findings support…

  7. Performance evaluation of a two detector camera for real-time video

    NARCIS (Netherlands)

    Lochocki, Benjamin; Gambín-regadera, Adrián; Artal, Pablo

    2016-01-01

    Single pixel imaging can be the preferred method over traditional 2D-array imaging in spectral ranges where conventional cameras are not available. However, when it comes to real-time video imaging, single pixel imaging cannot compete with the framerates of conventional cameras, especially when

  8. Evaluating Two Oral Health Video Interventions with Early Head Start Families

    Directory of Open Access Journals (Sweden)

    Lynn B. Wilson

    2013-01-01

    Full Text Available Poor oral health in early childhood can have long-term consequences, and parents often are unaware of the importance of preventive measures for infants and toddlers. Children in rural, low-income families suffer disproportionately from the effects of poor oral health. Participants were 91 parents of infants and toddlers enrolled in Early Head Start (EHS living in rural Hawai'i, USA. In this quasi-experimental design, EHS home visitors were assigned to use either a didactic or family-centered video with parents they served. Home visitors reviewed short segments of the assigned videos with parents over an eight-week period. Both groups showed significant prepost gains on knowledge and attitudes/behaviors relating to early oral health as well as self-reported changes in family oral health routines at a six-week followup. Controlling for pretest levels, parents in the family-centered video group showed larger changes in attitudes/behaviors at posttest and a higher number of positive changes in family oral health routines at followup. Results suggest that family-centered educational videos are a promising method for providing anticipatory guidance to parents regarding early childhood oral health. Furthermore, establishing partnerships between dental care, early childhood education, and maternal health systems offers a model that broadens potential reach with minimal cost.

  9. Evaluation of Distance Education System for Adult Education Using 4 Video Transmissions

    OpenAIRE

    渡部, 和雄; 湯瀬, 裕昭; 渡邉, 貴之; 井口, 真彦; 藤田, 広一

    2004-01-01

    The authors have developed a distance education system for interactive education which can transmit 4 video streams between distant lecture rooms. In this paper, we describe the results of our experiments using the system for adult education. We propose some efficient ways to use the system for adult education.

  10. Small-Scale Bullying Prevention Discussion Video for Classrooms: A Preliminary Evaluation

    Science.gov (United States)

    Migliaccio, Todd; Raskauskas, Juliana

    2013-01-01

    Bullying has been shown to be negatively related to both academic performance and attendance among students. The present study examined a small-scale bullying intervention using a video-discussion model. Eighty-one students in grades 4 through 6 completed pre- and posttests examining gains in knowledge of bullying and responses to it. Results…

  11. Evaluating Video Self-Modeling Treatment Outcomes: Differentiating between Statistically and Clinically Significant Change

    Science.gov (United States)

    La Spata, Michelle G.; Carter, Christopher W.; Johnson, Wendi L.; McGill, Ryan J.

    2016-01-01

    The present study examined the utility of video self-modeling (VSM) for reducing externalizing behaviors (e.g., aggression, conduct problems, hyperactivity, and impulsivity) observed within the classroom environment. After identification of relevant target behaviors, VSM interventions were developed for first and second grade students (N = 4),…

  12. PROCESS SIMULATION AND QUALITY EVALUATION IN INCREMENTAL SHEET FORMING

    Directory of Open Access Journals (Sweden)

    Meftah Hrairi

    2011-12-01

    Full Text Available Single Point Incremental Forming (SPIF is a promising sheet-metal-forming process that permits the manufacturing of small to medium-sized batches of complex parts at low cost. It allows metal forming to work in the critical ‘necking-to-tearing' zone which results in a strong thinning before failure if the process is well designed. Moreover, the process is complex due to the number of variables involved. Thus, it is not possible to consider that the process has been well assessed; several remaining aspects need to be clarified. The objective of the present paper is to study some of these aspects, namely, the phenomenon of the wall thickness overstretch along depth and the effect of the tool path on the distribution of the wall thickness using finite element simulations.Abstrak: Pembentukan Tokokan Mata Tunggal (Single Point Incremental Forming (SPIF merupakan satu proses pembentukan kepingan logam yang membolehkan pembuatan dalam jumlah yang kecil hingga sederhana, bahagian-bahagian yang kompleks pada kos yang rendah. Jika proses ini direka dengan baik, kaedah ini membolehkan pembentukan logam yang baik terhasil. Jika tidak, semasa peringkat zon kritikal ‘perleheran-ke-pengoyakan' menyebabkan penipisan keterlaluan yang boleh menyebabkan logam tersebut rosak. Tambahan pula, proses ini agak kompleks, kerana ia melibatkan beberapa pemboleh ubah. Maka, walaupun proses ini telah dinilaikan seeloknya; masih terdapat beberapa aspek lain yang perlu diperjelaskan. Objektif kertas ini dibentangkan adalah untuk mengkaji beberapa aspek tertentu, seperti, ketebalan dinding regangan berlebihan di sepanjang kedalaman dan kesan tool path (beberapa siri posisi koordinat untuk menentukan pergerakan alatan memotong ketika operasi memesin terhadap pengagihan ketebalan dinding menggunakan simulasi unsur terhingga.

  13. Evaluation of a tuberculosis education video among immigrants and refugees at an adult education center: a community-based participatory approach.

    Science.gov (United States)

    Wieland, Mark L; Nelson, Jonathan; Palmer, Tiffany; O'Hara, Connie; Weis, Jennifer A; Nigon, Julie A; Sia, Irene G

    2013-01-01

    Tuberculosis disproportionately affects immigrants and refugees to the United States. Upon arrival to the United States, many of these individuals attend adult education centers, but little is known about how to deliver tuberculosis health information at these venues. Therefore, the authors used a participatory approach to design and evaluate a tuberculosis education video in this setting. The authors used focus group data to inform the content of the video that was produced and delivered by adult learners and their teachers. The video was evaluated by learners for acceptability through 3 items with a 3-point Likert scale. Knowledge (4 items) and self-efficacy (2 items) about tuberculosis were evaluated before and after viewing the video. A total of 159 learners (94%) rated the video as highly acceptable. Knowledge about tuberculosis improved after viewing the video (56% correct vs. 82% correct; p education centers that serve large immigrant and refugee populations may be excellent venues for health education, and a video may be an effective tool to educate these populations. Furthermore, a participatory approach in designing health education materials may enhance the efficacy of these tools.

  14. Summary evaluation of the video, {open_quotes}Transportation of radioactive and hazardous materials: Safety for all concerned{close_quotes}

    Energy Technology Data Exchange (ETDEWEB)

    Monroe, M.C.; Young, C.F.

    1993-07-01

    Outreach materials are often developed and distributed without evaluation of their effectiveness. This report provides a glimpse of the effectiveness of one of the US Department of Energy`s videos on transportation of radioactive and hazardous materials. Data from a survey developed by Modern Talking Picture Service, Inc. are summarized. This survey was sent to recipients of the video at three to six weeks after they had received and viewed the video. The response rate is unknown; hence, the results suggest the range of perspectives on the video, rather than the representativeness of those perspectives. The results are also limited by incomplete responses to the survey. Most respondents were middle school and high school teachers who resided throughout the country. Respondents used the video in nearly all school subjects. Most respondents indicated that the video was fairly good and appreciated the factual information, although some saw it as propaganda. Respondents indicated that they would like additional information on hazardous wastes, nuclear power, and transportation. The test crashes were mentioned as a highlight of the video. Recommendations for revising the video and survey are included.

  15. Developing and Evaluating SynctoLearn, a Fully Automatic Video and Transcript Synchronization Tool for EFL Learners

    Science.gov (United States)

    Chen, Hao-Jan Howard

    2011-01-01

    Authentic videos are always motivational for foreign language learners. According to the findings of many empirical studies, subtitled L2 videos are particularly useful for foreign language learning. Although there are many authentic English videos available on the Internet, most of these videos do not have subtitles. If subtitles can be added to…

  16. SECRETS OF SONG VIDEO

    Directory of Open Access Journals (Sweden)

    Chernyshov Alexander V.

    2014-04-01

    Full Text Available The article focuses on the origins of the song videos as TV and Internet-genre. In addition, it considers problems of screen images creation depending on the musical form and the text of a songs in connection with relevant principles of accent and phraseological video editing and filming techniques as well as with additional frames and sound elements.

  17. Evaluation of an interactive web-based nursing course with streaming videos for medication administration skills.

    Science.gov (United States)

    Sowan, Azizeh K; Idhail, Jamila Abu

    2014-08-01

    Nursing students should exhibit competence in nursing skills in order to provide safe and quality patient care. This study describes the design and students' response to an interactive web-based course using streaming video technology tailored to students' needs and the course objectives of the fundamentals of nursing skills clinical course. A mixed-methodology design was used to describe the experience of 102 first-year undergraduate nursing students at a school of nursing in Jordan who were enrolled in the course. A virtual course with streaming videos was designed to demonstrate medication administration fundamental skills. The videos recorded the ideal lab demonstration of the skills, and real-world practice performed by registered nurses for patients in a hospital setting. After course completion, students completed a 30-item satisfaction questionnaire, 8 self-efficacy scales, and a 4-item scale solicited their preferences of using the virtual course as a substitute or a replacement of the lab demonstration. Students' grades in the skill examination of the procedures were measured. Relationships between the main variables and predictors of satisfaction and self-efficacy were examined. Students were satisfied with the virtual course (3.9 ± 0.56, out of a 5-point scale) with a high-perceived overall self-efficacy (4.38 ± 0.42, out of a 5-point scale). Data showed a significant correlation between student satisfaction, self-efficacy and achievement in the virtual course (r = 0.45-0.49, p streaming videos for clinical courses is a complex process that should be carefully designed to positively influence the learning experience. However, the learning benefits gained from such pedagogical approach are worth faculty, institution and students' efforts. Published by Elsevier Ireland Ltd.

  18. Does Wearable Medical Technology With Video Recording Capability Add Value to On-Call Surgical Evaluations?

    Science.gov (United States)

    Gupta, Sameer; Boehme, Jacqueline; Manser, Kelly; Dewar, Jannine; Miller, Amie; Siddiqui, Gina; Schwaitzberg, Steven D

    2016-10-01

    Background Google Glass has been used in a variety of medical settings with promising results. We explored the use and potential value of an asynchronous, near-real time protocol-which avoids transmission issues associated with real-time applications-for recording, uploading, and viewing of high-definition (HD) visual media in the emergency department (ED) to facilitate remote surgical consults. Study Design First-responder physician assistants captured pertinent aspects of the physical examination and diagnostic imaging using Google Glass' HD video or high-resolution photographs. This visual media were then securely uploaded to the study website. The surgical consultation then proceeded over the phone in the usual fashion and a clinical decision was made. The surgeon then accessed the study website to review the uploaded video. This was followed by a questionnaire regarding how the additional data impacted the consultation. Results The management plan changed in 24% (11) of cases after surgeons viewed the video. Five of these plans involved decision making regarding operative intervention. Although surgeons were generally confident in their initial management plan, confidence scores increased further in 44% (20) of cases. In addition, we surveyed 276 ED patients on their opinions regarding concerning the practice of health care providers wearing and using recording devices in the ED. The survey results revealed that the majority of patients are amenable to the addition of wearable technology with video functionality to their care. Conclusions This study demonstrates the potential value of a medically dedicated, hands-free, HD recording device with internet connectivity in facilitating remote surgical consultation. © The Author(s) 2016.

  19. Safety of long-term video-electroencephalographic monitoring for evaluation of epilepsy.

    Science.gov (United States)

    Noe, Katherine H; Drazkowski, Joseph F

    2009-06-01

    To determine the rate of medical complications from long-term video-electroencephalographic (EEG) monitoring for epilepsy. We reviewed the medical records of 428 consecutive adult patients with epilepsy who were admitted for diagnostic scalp video-EEG monitoring at Mayo Clinic's site in Arizona from January 1, 2005, to December 31, 2006; 149 met inclusion criteria for the study. Seizure number and type as well as timing and presence of seizure-related adverse outcomes were noted. Of the 149 adult patients included in the study, seizure clusters occurred in 35 (23%); 752 seizures were recorded. The mean time to first seizure was 2 days, with a mean length of stay of 5 days. Among these patients, there was 1 episode of status epilepticus, 3 potentially serious electrocardiographic abnormalities, 2 cases of postictal psychosis, and 4 vertebral compression fractures during a generalized convulsion, representing 11% of patients with a recorded generalized tonic-clonic seizure. No deaths, transfers to the intensive care unit, falls, dental injuries, or pulmonary complications were recorded. An adverse event requiring intervention or interfering with normal activity occurred in 21% of these patients. Length of stay was not affected by occurrence of adverse events. Prolonged video-EEG monitoring is an acceptably safe procedure. Adverse events occur but need not result in substantial morbidity or increase length of hospitalization. Appropriate precautions must be in place to prevent falls and promptly detect and treat seizure clusters, status epilepticus, serious electrocardiographic abnormalities, psychosis, and fractures.

  20. Video library for video imaging detection at intersection stop lines.

    Science.gov (United States)

    2010-04-01

    The objective of this activity was to record video that could be used for controlled : evaluation of video image vehicle detection system (VIVDS) products and software upgrades to : existing products based on a list of conditions that might be diffic...

  1. 48 CFR 247.372 - DD Form 1654, Evaluation of Transportation Cost Factors.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false DD Form 1654, Evaluation... Transportation in Supply Contracts 247.372 DD Form 1654, Evaluation of Transportation Cost Factors. Contracting personnel may use the DD Form 1654 to furnish information to the transportation office for development of...

  2. A High School-Based Evaluation of TakeCARE, a Video Bystander Program to Prevent Adolescent Relationship Violence.

    Science.gov (United States)

    Sargent, Kelli S; Jouriles, Ernest N; Rosenfield, David; McDonald, Renee

    2017-03-01

    Although bystander programs to prevent relationship and sexual violence have been evaluated with college students, few evaluations have been conducted with high school students. This study evaluated the effectiveness of TakeCARE, a brief video bystander program designed to promote helpful bystander behavior in situations involving relationship violence among high school students. Students (N = 1295; 52.5% female; 72.3% Hispanic) reported their bystander behavior at a baseline assessment. Classrooms (N = 66) were randomized to view TakeCARE or to a control condition, and high school counselors administered the video in the classrooms assigned to view TakeCARE. Students again reported their bystander behavior at a follow-up assessment approximately 3 months afterward. Results indicate that students who viewed TakeCARE reported more helpful bystander behavior at the follow-up assessment than students in the control condition. Results of exploratory analyses of the likelihood of encountering and intervening upon specific situations calling for bystander behavior are also reported. TakeCARE is efficacious when implemented in an urban high school by high school counselors.

  3. Video microblogging

    DEFF Research Database (Denmark)

    Bornoe, Nis; Barkhuus, Louise

    2010-01-01

    Microblogging is a recently popular phenomenon and with the increasing trend for video cameras to be built into mobile phones, a new type of microblogging has entered the arena of electronic communication: video microblogging. In this study we examine video microblogging, which is the broadcasting...... of short videos. A series of semi-structured interviews offers an understanding of why and how video microblogging is used and what the users post and broadcast....

  4. Video Games and Digital Literacies

    Science.gov (United States)

    Steinkuehler, Constance

    2010-01-01

    Today's youth are situated in a complex information ecology that includes video games and print texts. At the basic level, video game play itself is a form of digital literacy practice. If we widen our focus from the "individual player + technology" to the online communities that play them, we find that video games also lie at the nexus of a…

  5. Computer-Aided Color Aesthetic Evaluation Method Based on the Combination of Form and Color

    OpenAIRE

    Kang, Wenke; Qin, Sheng-feng; Zhang, Quan

    2015-01-01

    This paper presents a new method of color aesthetic evaluation based on the combination of form and color. According to the human visual physiological and psychological characteristics, this paper first proposes a new form-color field theory for the coupled form-color aesthetic evaluation based on the psychophysical field theory and the Moon and Spencer model. Second, it builds a coupled form-color topological graph for describing their interaction and develops a strength calculation algorith...

  6. Smart Streaming for Online Video Services

    OpenAIRE

    Chen, Liang; Zhou, Yipeng; Chiu, Dah Ming

    2013-01-01

    Bandwidth consumption is a significant concern for online video service providers. Practical video streaming systems usually use some form of HTTP streaming (progressive download) to let users download the video at a faster rate than the video bitrate. Since users may quit before viewing the complete video, however, much of the downloaded video will be "wasted". To the extent that users' departure behavior can be predicted, we develop smart streaming that can be used to improve user QoE with ...

  7. Psychometric Evaluation of the Interpersonal Support Evaluation List–Short Form in the ARIC Study Cohort

    Directory of Open Access Journals (Sweden)

    Thomas J. Payne

    2012-09-01

    Full Text Available The impact of social support on health outcomes is well documented. The current study evaluated a short form of the Interpersonal Support Evaluation List (ISEL-SF administered to 14,257 participants in the Atherosclerosis Risk in Communities study. Using confirmatory factor analysis, we attempted to replicate the subscale structure of the full-scale version. Additional analyses were conducted to examine the relationship of ISEL scores to key demographic variables, as well as the relationship with the Lubben Social Support Scale. We replicated the existing full-scale ISEL subscale structure in this short version. In addition, subscale scores were found to differ across gender, race, level of educational attainment, and marital status, although the magnitude of the various effects was modest. Correlations with another established measure of social support provide convergent validity for this abbreviated instrument. Results suggest this brief measure of perceived social support is a psychometrically valid instrument. An evaluation of its clinical utility is warranted.

  8. Big hits on the small screen: an evaluation of concussion-related videos on YouTube.

    Science.gov (United States)

    Williams, David; Sullivan, S John; Schneiders, Anthony G; Ahmed, Osman Hassan; Lee, Hopin; Balasundaram, Arun Prasad; McCrory, Paul R

    2014-01-01

    YouTube is one of the largest social networking websites, allowing users to upload and view video content that provides entertainment and conveys many messages, including those related to health conditions, such as concussion. However, little is known about the content of videos relating to concussion. To identify and classify the content of concussion-related videos available on YouTube. An observational study using content analysis. YouTube's video database was systematically searched using 10 search terms selected from MeSH and Google Adwords. The 100 videos with the largest view counts were chosen from the identified videos. These videos and their accompanying text were analysed for purpose, source and description of content by a panel of assessors who classified them into data-driven thematic categories. 434 videos met the inclusion criteria and the 100 videos with the largest view counts were chosen. The most common categories of the videos were the depiction of a sporting injury (37%) and news reports (25%). News and media organisations were the predominant source (51%) of concussion-related videos on YouTube, with very few being uploaded by professional or academic organisations. The median number of views per video was 26 191. Although a wide range of concussion-related videos were identified, there is a need for healthcare and educational organisations to explore YouTube as a medium for the dissemination of quality-controlled information on sports concussion.

  9. Video demystified

    CERN Document Server

    Jack, Keith

    2004-01-01

    This international bestseller and essential reference is the "bible" for digital video engineers and programmers worldwide. This is by far the most informative analog and digital video reference available, includes the hottest new trends and cutting-edge developments in the field. Video Demystified, Fourth Edition is a "one stop" reference guide for the various digital video technologies. The fourth edition is completely updated with all new chapters on MPEG-4, H.264, SDTV/HDTV, ATSC/DVB, and Streaming Video (Video over DSL, Ethernet, etc.), as well as discussions of the latest standards throughout. The accompanying CD-ROM is updated to include a unique set of video test files in the newest formats. *This essential reference is the "bible" for digital video engineers and programmers worldwide *Contains all new chapters on MPEG-4, H.264, SDTV/HDTV, ATSC/DVB, and Streaming Video *Completely revised with all the latest and most up-to-date industry standards.

  10. Evaluating the use of streaming video to support student learning in a first-year life sciences course for student nurses.

    Science.gov (United States)

    Green, Sue M; Voegeli, David; Harrison, Maureen; Phillips, Jackie; Knowles, Jess; Weaver, Mike; Shephard, Kerry

    2003-05-01

    Streaming video was used to support the learning of first year student nurses on a Life Sciences module, as one of many innovations designed to increase the range of resources and support available to students. This paper describes the background to this innovation, the procedures adopted and the results of extensive evaluation. The use of streaming video was evaluated in three applications in the module. A total of 656 students used online directed-learning sessions that incorporated streamed video. Just over half of these students actually viewed the video streams. Their feedback showed that 32% found access easy, 59% enjoyed using the resources, and 25% were very confident that they learned from them. Different types of video were used, and embedded in diverse ways, but the results were consistent across the three applications. They suggest that streamed video can contribute to useful resources to support learning by student nurses but, for a variety of reasons, it may not appeal or be adequately accessible to all students at present.

  11. [Evaluation of the characteristics of addiction to online video games among adolescents and young adults].

    Science.gov (United States)

    Schmit, S; Chauchard, E; Chabrol, H; Sejourne, N

    2011-06-01

    The objectives of this study are to assess the social characteristics, coping strategies, self-esteem and depressive symptoms in a population-dependent and not dependent on video games online, in order to investigate the correlations existing between these characteristics. The study was conducted among 193 subjects. Data were collected through a global questionnaire constituted of several scales. The global questionnaire consisted of a sociodemographic part (age, sex, social status, most played game, number of hours per week devoted to the game), a questionnaire assessing dependence and abuse according to the DSM -IV-TR, the feeling of social belonging scale (or ESAS which was doubled to collect information about the belonging in real life and virtual life), the Ways of coping check-list (WCCL), the Rosenberg self-esteem scale (EES), the Quality of interpersonal relations scale (EQRI), the UCLA Loneliness scale and the Center for epidemiologic studies depression scale (CES-D). The questionnaire was broadcasted on the Internet, specifically in the forums dedicated to "massively multiplayer online role-playing games" and in young people's forums in specific subject headings. The results show that there are significant differences between the two populations, especially regarding the social characteristics, depressive symptoms, self-esteem and coping strategies. In the entire population, 66 subjects (42%) were considered dependent on online video games and 92 subjects (58%) were not considered dependent. In the dependent population, the number of hours spent playing per week, the score of social belonging in the virtual life, the coping focused on the emotion, the score of loneliness or social isolation and the score obtained on the CES-D appeared more important than the scores obtained by the non-dependent. Moreover, the average age, the scores of social belonging in real life, self-esteem and sub-dimensions "family" and "friends" of the quality of interpersonal

  12. Self-evaluation and peer-feedback of medical students' communication skills using a web-based video annotation system. Exploring content and specificity

    NARCIS (Netherlands)

    Hulsman, Robert L.; van der Vloodt, Jane

    2015-01-01

    Objective: Self-evaluation and peer-feedback are important strategies within the reflective practice paradigm for the development and maintenance of professional competencies like medical communication. Characteristics of the self-evaluation and peer-feedback annotations of medical students' video

  13. Approach and Evaluation of a Mobile Video-Based and Location-Based Augmented Reality Platform for Information Brokerage

    Science.gov (United States)

    Dastageeri, H.; Storz, M.; Koukofikis, A.; Knauth, S.; Coors, V.

    2016-09-01

    Providing mobile location-based information for pedestrians faces many challenges. On one hand the accuracy of localisation indoors and outdoors is restricted due to technical limitations of GPS and Beacons. Then again only a small display is available to display information as well as to develop a user interface. Plus, the software solution has to consider the hardware characteristics of mobile devices during the implementation process for aiming a performance with minimum latency. This paper describes our approach by including a combination of image tracking and GPS or Beacons to ensure orientation and precision of localisation. To communicate the information on Points of Interest (POIs), we decided to choose Augmented Reality (AR). For this concept of operations, we used besides the display also the acceleration and positions sensors as a user interface. This paper especially goes into detail on the optimization of the image tracking algorithms, the development of the video-based AR player for the Android platform and the evaluation of videos as an AR element in consideration of providing a good user experience. For setting up content for the POIs or even generate a tour we used and extended the Open Geospatial Consortium (OGC) standard Augmented Reality Markup Language (ARML).

  14. APPROACH AND EVALUATION OF A MOBILE VIDEO-BASED AND LOCATION-BASED AUGMENTED REALITY PLATFORM FOR INFORMATION BROKERAGE

    Directory of Open Access Journals (Sweden)

    H. Dastageeri

    2016-09-01

    Full Text Available Providing mobile location-based information for pedestrians faces many challenges. On one hand the accuracy of localisation indoors and outdoors is restricted due to technical limitations of GPS and Beacons. Then again only a small display is available to display information as well as to develop a user interface. Plus, the software solution has to consider the hardware characteristics of mobile devices during the implementation process for aiming a performance with minimum latency. This paper describes our approach by including a combination of image tracking and GPS or Beacons to ensure orientation and precision of localisation. To communicate the information on Points of Interest (POIs, we decided to choose Augmented Reality (AR. For this concept of operations, we used besides the display also the acceleration and positions sensors as a user interface. This paper especially goes into detail on the optimization of the image tracking algorithms, the development of the video-based AR player for the Android platform and the evaluation of videos as an AR element in consideration of providing a good user experience. For setting up content for the POIs or even generate a tour we used and extended the Open Geospatial Consortium (OGC standard Augmented Reality Markup Language (ARML.

  15. Personalized video summarization based on group scoring

    OpenAIRE

    Darabi, K; G. Ghinea

    2014-01-01

    In this paper an expert-based model for generation of personalized video summaries is suggested. The video frames are initially scored and annotated by multiple video experts. Thereafter, the scores for the video segments that have been assigned the higher priorities by end users will be upgraded. Considering the required summary length, the highest scored video frames will be inserted into a personalized final summary. For evaluation purposes, the video summaries generated by our system have...

  16. Orgasm-associated incontinence (climacturia) after bladder neck-sparing radical prostatectomy: clinical and video-urodynamic evaluation.

    Science.gov (United States)

    Manassero, Francesca; Di Paola, Giuseppe; Paperini, Davide; Mogorovich, Andrea; Pistolesi, Donatella; Valent, Francesca; Selli, Cesare

    2012-08-01

    Orgasm-Associated Incontinence (OAI) or climacturia has been observed in male patients maintaining sexual potency after radical prostatectomy and cystectomy. We investigated the incidence and video-urodynamic aspects of this event in continent and potent patients after bladder neck-sparing (BNS) radical prostatectomy (RP). Comparing functional and morphological aspects between climacturic and non-climacturic patients to identify a possible explanation of this unusual kind of leakage that could seriously impact the sexual life after surgery. In a pool of 84 men, potent and continent at least 1 year after BNS RP, 24 (28.6%) reported climacturia and 7 agreed to undergo video-urodynamic evaluation (group 1), which was performed also in 5 controls (group 2). Those 12 men were also evaluated with 24-hour pad test, 5-item International Index of Erectile Function and International Prostate Symptom Score questionnaires. Functional urethral length (FUL) was significantly lower in the climacturia group (P=0.02) and time to continence recovery was significantly longer (P=0.05). No other significant differences were found between the two groups. The radiological appearance of the vesicourethral junction at voiding cystourethrography was similar. To the best of our knowledge, this is the first functional and morphological evaluation of climacturia after RP. In our experience, this event is indirectly associated with a reduced FUL in the sphincter area, although both patients and controls were continent during daily activities. BNS technique seems to reduce time to continence recovery, although climacturic patients need longer time than control patients. Since in our series no rigidity of the vesicourethral anastomosis was radiographically evident, we believe that differences in FUL could explain OAI. Anatomical difference in membranous urethra length could explain the occurrence of this symptom in patients treated with the same surgical technique. © 2012 International Society

  17. Evaluation of the effects of transmission impairments on perceived video quality by exploiting ReTRiEVED dataset

    Science.gov (United States)

    Paudyal, Pradip; Battisti, Federica; Carli, Marco

    2017-03-01

    The robust design and adaptation of multimedia networks relies on the study of the influence of potential network impairments on the perceived quality. Video quality may be affected by network impairments, such as delay, jitter, packet loss, and bandwidth, and the perceptual impact of these impairments may vary according to the video content. The effects of packet loss and encoding artifacts on the perceived quality have been widely addressed in the literature. However, the relationship between video content and network impairments on the perceived video quality has not been deeply investigated. A detailed analysis of ReTRiEVED test video dataset, designed by considering a set of potential network impairments, is presented, and the effects of transmission impairments on perceived quality are analyzed. Furthermore, the impact on the perceived quality of the video content in the presence of transmission impairments is studied by using video content descriptors. Finally, the performances of well-known quality metrics are tested on the proposed dataset.

  18. Query-by-Emoji Video Search

    NARCIS (Netherlands)

    Cappallo, S.; Mensink, T.; Snoek, C.G.M.

    2015-01-01

    This technical demo presents Emoji2Video, a query-by-emoji interface for exploring video collections. Ideogram-based video search and representation presents an opportunity for an intuitive, visual interface and concise non-textual summary of video contents, in a form factor that is ideal for small

  19. Development and preliminary evaluation of an online educational video about whole-genome sequencing for research participants, patients, and the general public.

    Science.gov (United States)

    Sanderson, Saskia C; Suckiel, Sabrina A; Zweig, Micol; Bottinger, Erwin P; Jabs, Ethylin Wang; Richardson, Lynne D

    2016-05-01

    As whole-genome sequencing (WGS) increases in availability, WGS educational aids are needed for research participants, patients, and the general public. Our aim was therefore to develop an accessible and scalable WGS educational aid. We engaged multiple stakeholders in an iterative process over a 1-year period culminating in the production of a novel 10-minute WGS educational animated video, "Whole Genome Sequencing and You" (https://goo.gl/HV8ezJ). We then presented the animated video to 281 online-survey respondents (the video-information group). There were also two comparison groups: a written-information group (n = 281) and a no-information group (n = 300). In the video-information group, 79% reported the video was easy to understand, satisfaction scores were high (mean 4.00 on 1-5 scale, where 5 = high satisfaction), and knowledge increased significantly. There were significant differences in knowledge compared with the no-information group but few differences compared with the written-information group. Intention to receive personal results from WGS and decisional conflict in response to a hypothetical scenario did not differ between the three groups. The educational animated video, "Whole Genome Sequencing and You," was well received by this sample of online-survey respondents. Further work is needed to evaluate its utility as an aid to informed decision making about WGS in other populations.Genet Med 18 5, 501-512.

  20. A Comparison of Visual Recognition of the Laryngopharyngeal Structures Between High and Standard Frame Rate Videos of the Fiberoptic Endoscopic Evaluation of Swallowing.

    Science.gov (United States)

    Aghdam, Mehran Alizadeh; Ogawa, Makoto; Iwahashi, Toshihiko; Hosokawa, Kiyohito; Kato, Chieri; Inohara, Hidenori

    2017-04-29

    The purpose of this study was to assess whether or not high frame rate (HFR) videos recorded using high-speed digital imaging (HSDI) improve the visual recognition of the motions of the laryngopharyngeal structures during pharyngeal swallow in fiberoptic endoscopic evaluation of swallowing (FEES). Five healthy subjects were asked to swallow 0.5 ml water under fiberoptic nasolaryngoscopy. The endoscope was connected to a high-speed camera, which recorded the laryngopharyngeal view throughout the swallowing process at 4000 frames/s (fps). Each HFR video was then copied and downsampled into a standard frame rate (SFR) video version (30 fps). Fifteen otorhinolaryngologists observed all of the HFR/SFR videos in random order and rated the four-point ordinal scale reflecting the degree of visual recognition of the rapid laryngopharyngeal structure motions just before the 'white-out' phenomenon. Significantly higher scores, reflecting better visibility, were seen for the HFR videos compared with the SFR videos for the following laryngopharyngeal structures: the posterior pharyngeal wall (p = 0.001), left pharyngeal wall (p = 0.015), right lateral pharyngeal wall (p = 0.035), tongue base (p = 0.005), and epiglottis tilting (p = 0.005). However, when visualized with HFR and SFR, 'certainly clear observation' of the laryngeal structures was achieved in <50% of cases, because all the motions were not necessarily captured in each video. These results demonstrate the use of HSDI in FEES makes the motion perception of the laryngopharyngeal structures during pharyngeal swallow easier in comparison to SFR videos with equivalent image quality due to the ability of HSDI to depict the laryngopharyngeal motions in a continuous manner.

  1. How the "Understanding Research Evidence" Web-Based Video Series From the National Collaborating Centre for Methods and Tools Contributes to Public Health Capacity to Practice Evidence-Informed Decision Making: Mixed-Methods Evaluation.

    Science.gov (United States)

    Chan, Linda; Mackintosh, Jeannie; Dobbins, Maureen

    2017-09-28

    The National Collaborating Centre for Methods and Tools (NCCMT) offers workshops and webinars to build public health capacity for evidence-informed decision-making. Despite positive feedback for NCCMT workshops and resources, NCCMT users found key terms used in research papers difficult to understand. The Understanding Research Evidence (URE) videos use plain language, cartoon visuals, and public health examples to explain complex research concepts. The videos are posted on the NCCMT website and YouTube channel. The first four videos in the URE web-based video series, which explained odds ratios (ORs), confidence intervals (CIs), clinical significance, and forest plots, were evaluated. The evaluation examined how the videos affected public health professionals' practice. A mixed-methods approach was used to examine the delivery mode and the content of the videos. Specifically, the evaluation explored (1) whether the videos were effective at increasing knowledge on the four video topics, (2) whether public health professionals were satisfied with the videos, and (3) how public health professionals applied the knowledge gained from the videos in their work. A three-part evaluation was conducted to determine the effectiveness of the first four URE videos. The evaluation included a Web-based survey, telephone interviews, and pretest and posttests, which evaluated public health professionals' experience with the videos and how the videos affected their public health work. Participants were invited to participate in this evaluation through various open access, public health email lists, through informational flyers and posters at the Canadian Public Health Association (CPHA) conference, and through targeted recruitment to NCCMT's network. In the Web-based surveys (n=46), participants achieved higher scores on the knowledge assessment questions from watching the OR (P=.04), CI (P=.04), and clinical significance (P=.05) videos but not the forest plot (P=.12) video, as

  2. VIDEO-BASED POINT CLOUD GENERATION USING MULTIPLE ACTION CAMERAS

    Directory of Open Access Journals (Sweden)

    T. Teo

    2015-05-01

    Full Text Available Due to the development of action cameras, the use of video technology for collecting geo-spatial data becomes an important trend. The objective of this study is to compare the image-mode and video-mode of multiple action cameras for 3D point clouds generation. Frame images are acquired from discrete camera stations while videos are taken from continuous trajectories. The proposed method includes five major parts: (1 camera calibration, (2 video conversion and alignment, (3 orientation modelling, (4 dense matching, and (5 evaluation. As the action cameras usually have large FOV in wide viewing mode, camera calibration plays an important role to calibrate the effect of lens distortion before image matching. Once the camera has been calibrated, the author use these action cameras to take video in an indoor environment. The videos are further converted into multiple frame images based on the frame rates. In order to overcome the time synchronous issues in between videos from different viewpoints, an additional timer APP is used to determine the time shift factor between cameras in time alignment. A structure form motion (SfM technique is utilized to obtain the image orientations. Then, semi-global matching (SGM algorithm is adopted to obtain dense 3D point clouds. The preliminary results indicated that the 3D points from 4K video are similar to 12MP images, but the data acquisition performance of 4K video is more efficient than 12MP digital images.

  3. Digital video.

    Science.gov (United States)

    Johnson, Don; Johnson, Mike

    2004-04-01

    The process of digital capture, editing, and archiving video has become an important aspect of documenting arthroscopic surgery. Recording the arthroscopic findings before and after surgery is an essential part of the patient's medical record. The hardware and software has become more reasonable to purchase, but the learning curve to master the software is steep. Digital video is captured at the time of arthroscopy to a hard disk, and written to a CD at the end of the operative procedure. The process of obtaining video of open procedures is more complex. Outside video of the procedure is recorded on digital tape with a digital video camera. The camera must be plugged into a computer to capture the video on the hard disk. Adobe Premiere software is used to edit the video and render the finished video to the hard drive. This finished video is burned onto a CD. We outline the choice of computer hardware and software for the manipulation of digital video. The techniques of backup and archiving the completed projects and files also are outlined. The uses of digital video for education and the formats that can be used in PowerPoint presentations are discussed.

  4. Unifying the Video and Question Attentions for Open-Ended Video Question Answering.

    Science.gov (United States)

    Xue, Hongyang; Zhao, Zhou; Cai, Deng

    2017-08-29

    Video question answering is an important task towards scene understanding and visual data retrieval. However, current visual question answering works mainly focus on a single static image which is distinct from the dynamic and sequential visual data in the real world. Their approaches cannot utilize the temporal information in videos. In this paper we introduce the task of free-form open-ended video question answering. The open-ended answers enable wider applications compared with the common multiple-choice tasks in Visual-QA. We first propose a dataset for open-ended Video-QA with the automatic question generation approaches. Then we propose our sequential video attention and temporal question attention models. These two models apply the attention mechanism on videos and questions while preserving the sequential and temporal structures of the guides. The two models are integrated into the model of unified attention. After the video and the question are encoded, the answers are generated wordwisely from our models by a decoder. In the end, we evaluate our models on the proposed dataset. The experimental results demonstrate the effectiveness of our proposed model.

  5. Bilingual Cancer Genetic Education Modules for the Deaf Community: Development and Evaluation of the Online Video Material.

    Science.gov (United States)

    Boudreault, Patrick; Wolfson, Alicia; Berman, Barbara; Venne, Vickie L; Sinsheimer, Janet S; Palmer, Christina

    2017-12-20

    Health information about inherited forms of cancer and the role of family history in cancer risk for the American Sign Language (ASL) Deaf community, a linguistic and cultural community, needs improvement. Cancer genetic education materials available in English print format are not accessible for many sign language users because English is not their native or primary language. Per Center for Disease Control and Prevention recommendations, the level of literacy for printed health education materials should not be higher than 6th grade level (~ 11 to 12 years old), and even with this recommendation, printed materials are still not accessible to sign language users or other nonnative English speakers. Genetic counseling is becoming an integral part of healthcare, but often ASL users are not considered when health education materials are developed. As a result, there are few genetic counseling materials available in ASL. Online tools such as video and closed captioning offer opportunities for educators and genetic counselors to provide digital access to genetic information in ASL to the Deaf community. The Deaf Genetics Project team used a bilingual approach to develop a 37-min interactive Cancer Genetics Education Module (CGEM) video in ASL with closed captions and quizzes, and demonstrated that this approach resulted in greater cancer genetic knowledge and increased intentions to obtain counseling or testing, compared to standard English text information (Palmer et al., Disability and Health Journal, 10(1):23-32, 2017). Though visually enhanced educational materials have been developed for sign language users with multimodal/lingual approach, little is known about design features that can accommodate a diverse audience of sign language users so the material is engaging to a wide audience. The main objectives of this paper are to describe the development of the CGEM and to determine if viewer demographic characteristics are associated with two measurable aspects of

  6. Image and video search engine for the World Wide Web

    Science.gov (United States)

    Smith, John R.; Chang, Shih-Fu

    1997-01-01

    We describe a visual information system prototype for searching for images and videos on the World-Wide Web. New visual information in the form of images, graphics, animations and videos is being published on the Web at an incredible rate. However, cataloging this visual data is beyond the capabilities of current text-based Web search engines. In this paper, we describe a complete system by which visual information on the Web is (1) collected by automated agents, (2) processed in both text and visual feature domains, (3) catalogued and (4) indexed for fast search and retrieval. We introduce an image and video search engine which utilizes both text-based navigation and content-based technology for searching visually through the catalogued images and videos. Finally, we provide an initial evaluation based upon the cataloging of over one half million images and videos collected from the Web.

  7. Studenterproduceret video til eksamen

    DEFF Research Database (Denmark)

    Jensen, Kristian Nøhr; Hansen, Kenneth

    2016-01-01

    Formålet med denne artikel er at vise, hvordan læringsdesign og stilladsering kan anvendes til at skabe en ramme for studenterproduceret video til eksamen på videregående uddannelser. Artiklen tager udgangspunkt i en problemstilling, hvor uddannelsesinstitutionerne skal håndtere og koordinere...... de fagfaglige og mediefaglige undervisere et redskab til at fokusere og koordinere indsatsen frem mod målet med, at de studerende producerer og anvender video til eksamen....

  8. Immersive video

    Science.gov (United States)

    Moezzi, Saied; Katkere, Arun L.; Jain, Ramesh C.

    1996-03-01

    Interactive video and television viewers should have the power to control their viewing position. To make this a reality, we introduce the concept of Immersive Video, which employs computer vision and computer graphics technologies to provide remote users a sense of complete immersion when viewing an event. Immersive Video uses multiple videos of an event, captured from different perspectives, to generate a full 3D digital video of that event. That is accomplished by assimilating important information from each video stream into a comprehensive, dynamic, 3D model of the environment. Using this 3D digital video, interactive viewers can then move around the remote environment and observe the events taking place from any desired perspective. Our Immersive Video System currently provides interactive viewing and `walkthrus' of staged karate demonstrations, basketball games, dance performances, and typical campus scenes. In its full realization, Immersive Video will be a paradigm shift in visual communication which will revolutionize television and video media, and become an integral part of future telepresence and virtual reality systems.

  9. Video diaries on social media: Creating online communities for geoscience research and education

    Science.gov (United States)

    Tong, V.

    2013-12-01

    Making video clips is an engaging way to learn and teach geoscience. As smartphones become increasingly common, it is relatively straightforward for students to produce ';video diaries' by recording their research and learning experience over the course of a science module. Instead of keeping the video diaries for themselves, students may use the social media such as Facebook for sharing their experience and thoughts. There are some potential benefits to link video diaries and social media in pedagogical contexts. For example, online comments on video clips offer useful feedback and learning materials to the students. Students also have the opportunity to engage in geoscience outreach by producing authentic scientific contents at the same time. A video diary project was conducted to test the pedagogical potential of using video diaries on social media in the context of geoscience outreach, undergraduate research and teaching. This project formed part of a problem-based learning module in field geophysics at an archaeological site in the UK. The project involved i) the students posting video clips about their research and problem-based learning in the field on a daily basis; and ii) the lecturer building an online outreach community with partner institutions. In this contribution, I will discuss the implementation of the project and critically evaluate the pedagogical potential of video diaries on social media. My discussion will focus on the following: 1) Effectiveness of video diaries on social media; 2) Student-centered approach of producing geoscience video diaries as part of their research and problem-based learning; 3) Learning, teaching and assessment based on video clips and related commentaries posted on Facebook; and 4) Challenges in creating and promoting online communities for geoscience outreach through the use of video diaries. I will compare the outcomes from this study with those from other pedagogical projects with video clips on geoscience, and

  10. Indexing, Browsing, and Searching of Digital Video.

    Science.gov (United States)

    Smeaton, Alan F.

    2004-01-01

    Presents a literature review that covers the following topics related to indexing, browsing, and searching of digital video: video coding and standards; conventional approaches to accessing digital video; automatically structuring and indexing digital video; searching, browsing, and summarization; measurement and evaluation of the effectiveness of…

  11. Video. Natural orifice transtracheal evaluation of the thoracic cavity and mediastinum.

    Science.gov (United States)

    Yang, Chen; Liu, Hung-Ping; Chu, Yen; Liu, Yun-Hen; Wu, Ching-Yang; Ko, Po-Jen; Liu, Hui-Ping

    2010-11-01

    This study aimed to determine the feasibility of a novel transtracheal endoscopic technique for thoracic and mediastinum evaluation in a canine model. In two dogs under general anesthesia, a transverse incision was made in the right lateral wall of the lower trachea and used as an entrance for thoracic and mediastinum evaluation. Transtracheal thoracoscopic evaluation was possible in both animals. One animal experienced massive subcutaneous emphysema immediately after evaluation of the thoracic cavity and required chest tube drainage. The follow-up endoscopies 2 weeks after surgery showed good healing of the tracheal openings in both animals. The transtracheal approach to the thoracic cavity and mediastinum appears to be feasible. This technique may provide an intriguing platform for the development of natural orifice transluminal surgery (NOTES) in the thoracic cavity.

  12. High Dynamic Range Video

    CERN Document Server

    Myszkowski, Karol

    2008-01-01

    This book presents a complete pipeline forHDR image and video processing fromacquisition, through compression and quality evaluation, to display. At the HDR image and video acquisition stage specialized HDR sensors or multi-exposure techniques suitable for traditional cameras are discussed. Then, we present a practical solution for pixel values calibration in terms of photometric or radiometric quantities, which are required in some technically oriented applications. Also, we cover the problem of efficient image and video compression and encoding either for storage or transmission purposes, in

  13. The Power of a Parent's Touch: Evaluation of Reach and Impact of a Targeted Evidence-Based YouTube Video.

    Science.gov (United States)

    Campbell-Yeo, Marsha; Dol, Justine; Disher, Timothy; Benoit, Britney; Chambers, Christine T; Sheffield, Kaitlyn; Boates, Talia; Harrison, Denise; Hewitt, Brenda; Jangaard, Krista; Stinson, Jennifer; Taddio, Anna; Parker, Jennifer A; Caddell, Kim

    Despite strong evidence that skin-to-skin contact and breast-feeding are effective pain-relieving interventions for infants undergoing painful procedures, they remain underutilized in clinical practice. Given the important contribution of parents, there is a need to find innovative ways to assist parents to become actively involved in their infant's care. We developed a YouTube video to disseminate evidence-based information on the effectiveness of skin-to-skin contact and breast-feeding for infant pain management. The 2-minute 39-second video launched on December 2, 2014, and was promoted through Web-based and in-person communication and YouTube advertisements. Data were collected using YouTube analytics and an online survey. Post-18 months from its launch, the video had a reach of 157 938 views from 154 countries, with most viewers watching an average of 73% of the video (1 minute 56 seconds). Parents (n = 32) and healthcare providers (n = 170) completed the survey. Overall, both reported that they liked the video, found it helpful, felt more confident, and were more likely to use skin-to-skin contact (16% and 12%) and breast-feeding (3% and 11%), respectively, during future painful procedures. Despite the high-viewing patterns, alternative methods should be considered to better evaluate the impact on practice change.

  14. Evaluation of effect of 3D video glasses on perceived pain and unpleasantness induced by restorative dental treatment

    DEFF Research Database (Denmark)

    Bentsen, Bo; Svensson, Peter; Wenzel, Ann

    2001-01-01

    of pain and unpleasantness. The cavities were then filled using a routine composite technique. Eventually, the patient indicated whether s/he would prefer video glasses or not if s/he were to have another filling and what the expectations of the effect had been. Differences in VAS ratings in the video...

  15. Video Simulations to Develop Preservice Mathematics Teachers' Discourse Practices

    Science.gov (United States)

    Amador, Julie M.

    2018-01-01

    The incorporation of video technology in teacher education programmes is increasingly prevalent, with teacher educators commonly using three traditional forms of videos: published video, preservice teachers' own videos and colleagues' videos. This study explored a fourth type of video, self-created scripted video simulations in which preservice…

  16. Patients with epilepsy and patients with psychogenic non-epileptic seizures: video-EEG, clinical and neuropsychological evaluation.

    Science.gov (United States)

    Turner, Katherine; Piazzini, Ada; Chiesa, Valentina; Barbieri, Valentina; Vignoli, Aglaia; Gardella, Elena; Tisi, Giuseppe; Scarone, Silvio; Canevini, Maria Paola; Gambini, Orsola

    2011-11-01

    The incidence of psychogenic non-epileptic seizures (PNES) is 4.9/100,000/year and it is estimated that about 20-30% of patients referred to tertiary care epilepsy centers for refractory seizures have both epilepsy and PNES. The purpose of our study is to evaluate psychiatric disorders and neuropsychological functions among patients with PNES, patients with epilepsy associated with PNES and patients with epilepsy. We evaluated 66 consecutive in-patients with video-EEG recordings: 21 patients with epilepsy, 22 patients with PNES and 10 patients with epilepsy associated with PNES; 13 patients were excluded (8 because of mental retardation and 5 because they did not present seizures or PNES during the recording period). All patients with PNES had a psychiatric diagnosis (100%) vs. 52% of patients with epilepsy. Cluster B personality disorders were more common in patients with PNES. We observed fewer mood and anxiety disorders in patients with PNES compared with those with epilepsy. We did not find statistically significant differences in neuropsychological profiles among the 3 patient groups. This study can help to contribute to a better understanding of the impact of PNES manifestations, in addition to the occurrence of seizures, in order to provide patients with more appropriate clinical, psychological and social care. Copyright © 2011 British Epilepsy Association. Published by Elsevier Ltd. All rights reserved.

  17. Evaluation of the Role of Monocular Video Game Play as an Adjuvant to Occlusion Therapy in the Management of Anisometropic Amblyopia.

    Science.gov (United States)

    Singh, Archita; Sharma, Pradeep; Saxena, Rohit

    2017-07-01

    To evaluate the role of monocular video game play as an adjuvant to occlusion therapy in the treatment of anisometropic amblyopia. In a prospective randomized study design, 68 children with ages ranging from 6 to 14 years who had anisometropic amblyopia with a best corrected visual acuity (BCVA) in the amblyopic eye of better than 6/36 and worse than 6/12 and no manifest strabismus were recruited. They were randomly allocated into two groups: 34 children received 1 hour per day of video game play for the first month plus 6 hours per day of occlusion therapy (video game and occlusion group) and 34 children received 6 hours per day of occlusion therapy alone (occlusion only group). Patients were then evaluated at baseline and 1 and 3 months after treatment for BCVA, stereoacuity, and contrast sensitivity. In the video game and occlusion group, BCVA improved from 0.61 ± 0.12 logarithm of the minimum angle of resolution (logMAR) at baseline to 0.51 ± 0.14 logMAR (P = .001) at 1 month and 0.40 ± 0.15 logMAR (P = .001) at 3 months. In the occlusion only group, BCVA improved from 0.65 ± 0.09 logMAR at baseline to 0.60 ± 0.10 logMAR (P = .001) at 1 month and 0.48 ± 0.10 logMAR (P = .001) at 3 months. There was significantly more improvement in the video game and occlusion group compared to the occlusion only group (P = .003 at 1 month and P = .027 at 3 months). Video game play plus occlusion therapy enhances the visual recovery in anisometropic amblyopia. [J Pediatr Ophthalmol Strabismus. 2017;54(4):244-249.]. Copyright 2017, SLACK Incorporated.

  18. Evaluation of performance of co crystals of mefloquine hydrochloride in tablet dosage form.

    Science.gov (United States)

    Shete, A S; Yadav, A V; Murthy, M S

    2013-05-01

    The objective of present investigation was to evaluate performance of cocrystals of Mefloquine Hydrochloride (MFL) in tablet dosage form. Our previous investigation showed significant effect of cocrystal formers on improving the solubility and dissolution rate of Mefloquine hydrochloride by cocrystallization method when prepared by solution cocrystallization method. Prepared cocrystals of MFL with different ratio of cocrystal formers were incorporated in tablet dosage form and evaluated for micrometric properties, drug content, hardness, disintegration test, vitro dissolution studies and stability studies. Performance was compared with laboratory prepared tablet of MFL 250 mg. The considerable improvement in the dissolution rate was observed in case of cocrystals based tablets than pure MFL tablets. So we can incorporate cocrystals in tablet dosage form to enhance in vitro and in vivo performance. To the best of our knowledge, this is the first report, cocrystals has been evaluated in tablet dosage form.

  19. Cognitive testing to evaluate revisions to the Vaccine Adverse Event Reporting System (VAERS) reporting form.

    Science.gov (United States)

    Suragh, Tiffany A; Miller, Elaine R; Hibbs, Beth F; Winiecki, Scott K; Zinderman, Craig; Shimabukuro, Tom T

    2017-04-25

    The Vaccine Adverse Event Reporting System (VAERS) is the spontaneous (passive) reporting system CDC and FDA use to monitor vaccine safety. We used cognitive testing to evaluate proposed revisions to the current VAERS form. We conducted in-person cognitive interviews with 22 volunteers to evaluate proposed revisions in a prototype VAERS 2.0 form (new VAERS form). We analyzed data using thematic analysis. Repeating themes included preferences for: brevity, simplicity and clarity; features to minimize time requirements and facilitate ease of completion; logical ordering of questions by topic and importance; and visual cues like color-coded highlighting. Interviews identified instances of discordance between the intended meaning questions (from the perspective of CDC and FDA) and interpretation by volunteers. Cognitive testing yielded useful information to guide further revisions of the VAERS form. Cognitive testing can be an effective tool for public health programs interested in developing surveys and reporting forms. Published by Elsevier Ltd.

  20. Simulation of video sequences for an accurate evaluation of tracking algorithms on complex scenes

    Science.gov (United States)

    Dubreu, Christine; Manzanera, Antoine; Bohain, Eric

    2008-04-01

    As target tracking is arousing more and more interest, the necessity to reliably assess tracking algorithms in any conditions is becoming essential. The evaluation of such algorithms requires a database of sequences representative of the whole range of conditions in which the tracking system is likely to operate, together with its associated ground truth. However, building such a database with real sequences, and collecting the associated ground truth appears to be hardly possible and very time-consuming. Therefore, more and more often, synthetic sequences are generated by complex and heavy simulation platforms to evaluate the performance of tracking algorithms. Some methods have also been proposed using simple synthetic sequences generated without such complex simulation platforms. These sequences are generated from a finite number of discriminating parameters, and are statistically representative, as regards these parameters, of real sequences. They are very simple and not photorealistic, but can be reliably used for low-level tracking algorithms evaluation in any operating conditions. The aim of this paper is to assess the reliability of these non-photorealistic synthetic sequences for evaluation of tracking systems on complex-textured objects, and to show how the number of parameters can be increased to synthesize more elaborated scenes and deal with more complex dynamics, including occlusions and three-dimensional deformations.

  1. Student use of flipped classroom videos in a therapeutics course.

    Science.gov (United States)

    Patanwala, Asad E; Erstad, Brian L; Murphy, John E

    To evaluate the extent of student use of flipped classroom videos. This was a cross-sectional study conducted in a college of pharmacy therapeutics course in the Unites States. In one section of the course (four sessions) all content was provided in the form of lecture videos that students had to watch prior to class. Class time was spent discussing patient cases. For half of the sessions, there was an electronic quiz due prior to class. The outcome measure was video view time in minutes. Adequate video view time was defined as viewing ≥75% of total video duration. Video view time was compared with or without quizzes using the Wilcoxon signed-rank test. There were 100 students in the class and all were included in the study. Overall, 74 students had adequate video view time prior to session 1, which decreased to 53 students for session 2, 53 students for session 3, and 36 students for session 4. Median video view time was greater when a quiz was required [80 minutes (IQR: 38-114) versus 69 minutes (IQR: 3-105), p flipped classroom is low and decreases with time. Preparation is higher when there is a quiz required. Copyright © 2016 Elsevier Inc. All rights reserved.

  2. Self-evaluation and peer-feedback of medical students' communication skills using a web-based video annotation system. Exploring content and specificity.

    Science.gov (United States)

    Hulsman, Robert L; van der Vloodt, Jane

    2015-03-01

    Self-evaluation and peer-feedback are important strategies within the reflective practice paradigm for the development and maintenance of professional competencies like medical communication. Characteristics of the self-evaluation and peer-feedback annotations of medical students' video recorded communication skills were analyzed. Twenty-five year 4 medical students recorded history-taking consultations with a simulated patient, uploaded the video to a web-based platform, marked and annotated positive and negative events. Peers reviewed the video and self-evaluations and provided feedback. Analyzed were the number of marked positive and negative annotations and the amount of text entered. Topics and specificity of the annotations were coded and analyzed qualitatively. Students annotated on average more negative than positive events. Additional peer-feedback was more often positive. Topics most often related to structuring the consultation. Students were most critical about their biomedical topics. Negative annotations were more specific than positive annotations. Self-evaluations were more specific than peer-feedback and both show a significant correlation. Four response patterns were detected that negatively bias specificity assessment ratings. Teaching students to be more specific in their self-evaluations may be effective for receiving more specific peer-feedback. Videofragmentrating is a convenient tool to implement reflective practice activities like self-evaluation and peer-feedback to the classroom in the teaching of clinical skills. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  3. Developing the Fourth Evaluation Dimension: A Protocol for Evaluation of Video From the Patient's Perspective During Major Incident Exercises.

    Science.gov (United States)

    Haverkort, J J Mark; Leenen, Luke P H

    2017-10-01

    Presently used evaluation techniques rely on 3 traditional dimensions: reports from observers, registration system data, and observational cameras. Some of these techniques are observer-dependent and are not reproducible for a second review. This proof-of-concept study aimed to test the feasibility of extending evaluation to a fourth dimension, the patient's perspective. Footage was obtained during a large, full-scale hospital trauma drill. Two mock victims were equipped with point-of-view cameras filming from the patient's head. Based on the Major Incident Hospital's first experience during the drill, a protocol was developed for a prospective, standardized method to evaluate a hospital's major incident response from the patient's perspective. The protocol was then tested in a second drill for its feasibility. New insights were gained after review of the footage. The traditional observer missed some of the evaluation points, which were seen on the point-of-view cameras. The information gained from the patient's perspective proved to be implementable into the designed protocol. Use of point-of-view camera recordings from a mock patient's perspective is a valuable addition to traditional evaluation of trauma drills and trauma care. Protocols should be designed to optimize and objectify judgement of such footage. (Disaster Med Public Health Preparedness. 2017;11:594-599).

  4. Evaluation of an animated instructional video as a training tool for manual perineum support during vaginal delivery.

    Science.gov (United States)

    Ali, Hadil Y; Vikanes, Åse; Anti, Marit; Hassan, Sahar; Ismail, Khaled M; Zimmo, Kaled; Zimmo, Mohammed; Fosse, Erik; Laine, Katariina

    2017-05-01

    To explore attitudes to an animation-based bimanual perineum-support technique (bPST) training video, and to investigate factors affecting the acceptability of the animation as a teaching modality. A quantitative study conducted between November 1, 2014, and January 1, 2015, included obstetricians and midwives of any age and experience from relevant Norwegian professional organizations, and obstetrics and gynecology experts selected by the authors. Participants completed an anonymous online-survey evaluating the accuracy and clarity of the animation, and assessing knowledge of bPST and clinical practice. Factor and reliability analyses were conducted and the survey results were stratified based on the profession of the participants. The online survey was completed by 124 participants. There were 6 (5.4%) participants who reported using bPST before the study and 102 (92%) who described themselves as willing to use it afterwards, a significant increase (Z=-9.42; Peffectiveness of bPST could potentially increase user satisfaction with the animation. © 2017 International Federation of Gynecology and Obstetrics.

  5. Initial evaluation of prospective cardiac triggering using photoplethysmography signals recorded with a video camera compared to pulse oximetry and electrocardiography at 7T MRI.

    Science.gov (United States)

    Spicher, Nicolai; Kukuk, Markus; Maderwald, Stefan; Ladd, Mark E

    2016-11-24

    Accurate synchronization between magnetic resonance imaging data acquisition and a subject's cardiac activity ("triggering") is essential for reducing image artifacts but conventional, contact-based methods for this task are limited by several factors, including preparation time, patient inconvenience, and susceptibility to signal degradation. The purpose of this work is to evaluate the performance of a new contact-free triggering method developed with the aim to eventually replace conventional methods in non-cardiac imaging applications. In this study, the method's performance is evaluated in the context of 7 Tesla non-enhanced angiography of the lower extremities. Our main contribution is a basic algorithm capable of estimating in real-time the phase of the cardiac cycle from reflection photoplethysmography signals obtained from skin color variations of the forehead recorded with a video camera. Instead of finding the algorithm's parameters heuristically, they were optimized using videos of the forehead as well as electrocardiography and pulse oximetry signals that were recorded from eight healthy volunteers in and outside the scanner, with and without active radio frequency and gradient coils. Based on the video characteristics, synthetic signals were generated and the "best available" values of an objective function were determined using mathematical optimization. The performance of the proposed method with optimized algorithm parameters was evaluated by applying it to the recorded videos and comparing the computed triggers to those of contact-based methods. Additionally, the method was evaluated by using its triggers for acquiring images from a healthy volunteer and comparing the result to images obtained using pulse oximetry triggering. During evaluation of the videos recorded inside the bore with active radio frequency and gradient coils, the pulse oximeter triggers were labeled in 62.5% as "potentially usable" for cardiac triggering, the electrocardiography

  6. An Evaluation of a Language for Paper-based Form Sketching

    DEFF Research Database (Denmark)

    Farruglia, Phillip; Borg, Johnathan; Camilleri, K.P.

    2006-01-01

    Designers still sketch on paper to externalize their early form concepts. The user-interface of current Computer-Aided Geometric Modeling (CAGM) systems lacks the fluidity of sketching. Yet, such systems are still useful in conceptual design since they assist designers in visualizing an evolving...... between paper-based form sketching and CAGM systems. Evaluation results revealed that whilst PSL is easy-to-learn, yet it requires improvements. Such a sketching language contributes a step towards simulating early form design solutions by the combined use of paper-based sketches and 3D models....

  7. Intraoperative Evaluation of Reverse Bypass Using a Naturally Formed "Bonnet" Superficial Temporal Artery: Technical Note.

    Science.gov (United States)

    Nagm, Alhusain; Horiuchi, Tetsuyoshi; Hasegawa, Takatoshi; Hongo, Kazuhiro

    2016-04-01

    In reverse bypass that used a naturally formed "bonnet" superficial temporal artery, intraoperative volume flow measurement quantifies flow augmentation after revascularization, confirms flow preservation, and identifies inadvertent vessel compromise. A 75-year-old man presented with transient ischemic attacks attributed to right internal carotid artery stenosis. He underwent successful reverse bypass via a naturally formed "bonnet" superficial temporal artery middle cerebral artery bypass. As the result of proper intraoperative volume flow evaluation, a successful reverse bypass was achieved. Modification of the intraoperative stroke risk and prediction of the long-term patency after reverse bypass can be achieved by meticulous intraoperative blood flow evaluation. Copyright © 2016 Elsevier Inc. All rights reserved.

  8. Evaluating a public display installation with game and video to raise awareness of Attention Deficit Hyperactivity Disorder

    OpenAIRE

    Craven, Michael P.; Simons, Lucy; Gillott, Alinda; North, Steve; Schnädelbach, Holger; Young, Zoe

    2015-01-01

    Networked Urban Screens offer new possibilities for public health education and awareness. An information video about Attention Deficit Hyperactivity Disorder (ADHD) was combined with a custom browser-based video game and successfully deployed on an existing research platform, Screens in the Wild (SitW). The SitW platform consists of 46-in. touchscreen or interactive displays, a camera, a microphone and a speaker, deployed at four urban locations in England. Details of the platform and softwa...

  9. Video Podcasts

    DEFF Research Database (Denmark)

    Nortvig, Anne Mette; Sørensen, Birgitte Holm

    2016-01-01

    This project’s aim was to support and facilitate master’s students’ preparation and collaboration by making video podcasts of short lectures available on YouTube prior to students’ first face-to-face seminar. The empirical material stems from group interviews, from statistical data created through...... YouTube analytics and from surveys answered by students after the seminar. The project sought to explore how video podcasts support learning and reflection online and how students use and reflect on the integration of online activities in the videos. Findings showed that students engaged actively...

  10. The Art of Video Games

    Science.gov (United States)

    Johnson, Mark M.

    2012-01-01

    The Smithsonian American Art Museum has created and will tour an exhibition on a most unusual but extremely popular art form--"The Art of Video Games." As one of the largest and first of its type, this exhibition will document and explore a 40-year evolution of video games as an artistic medium, with a focus on striking visual effects and the…

  11. Video Streaming in Online Learning

    Science.gov (United States)

    Hartsell, Taralynn; Yuen, Steve Chi-Yin

    2006-01-01

    The use of video in teaching and learning is a common practice in education today. As learning online becomes more of a common practice in education, streaming video and audio will play a bigger role in delivering course materials to online learners. This form of technology brings courses alive by allowing online learners to use their visual and…

  12. Lumbar spine stabilization with a thoracolumbosacral orthosis: evaluation with video fluoroscopy.

    Science.gov (United States)

    Vander Kooi, Douglas; Abad, Gregory; Basford, Jeffrey R; Maus, Timothy P; Yaszemski, Michael J; Kaufman, Kenton R

    2004-01-01

    L3-L5 vertebral body motion was tracked fluoroscopically as individuals performed flexion-extension movements wearing different thoracolumbosacral orthoses (TLSOs). To assess the effect of custom fitted TLSOs on lumbar vertebral body motion. Several methods have been used to evaluate dynamic vertebral motion in vivo. Controversy remains regarding the utility of a TLSO in decreasing intervertebral motion in the lumbar spine. Dynamic motion of the vertebral bodies was assessed fluoroscopically under four conditions: without a brace, with a custom fitted TLSO, with the TLSO and thigh extender at 0 degrees or 15 degrees. Intervertebral motion, i.e., the rotation of one vertebral body with respect to the adjacent body in the sagittal plane, throughout the flexion-extension cycle was used to assess the effect of each condition. The TSLO reduced both the total L3-L5 range of motion and the intervertebral motion at each individual level. Total rotation at L3 with respect to horizontal was reduced from 70 degrees without a brace to 50 degrees with a TLSO. Use of the thigh extender provided an additional reduction to 10 degrees. There was no difference between the 0 degrees and 15 degrees settings. Intervertebral motion was reduced by 40% at both L3-L4 and L4-L5 when comparing no brace to TLSO and an additional 15% when a thigh extender was added. A custom molded TLSO reduces both total L3-L5 motion and intervertebral motion in the lower lumbar spine. These effects are enhanced if a thigh extender is used.

  13. Consensus-based guidelines for Video EEG monitoring in the pre-surgical evaluation of children with epilepsy in the UK.

    Science.gov (United States)

    Pressler, Ronit M; Seri, Stefano; Kane, Nick; Martland, Tim; Goyal, Sushma; Iyer, Anand; Warren, Elliott; Notghi, Lesley; Bill, Peter; Thornton, Rachel; Appleton, Richard; Doyle, Sarah; Rushton, Sarah; Worley, Alan; Boyd, Stewart G

    2017-08-01

    Paediatric Epilepsy surgery in the UK has recently been centralised in order to improve expertise and quality of service available to children. Video EEG monitoring or telemetry is a highly specialised and a crucial component of the pre-surgical evaluation. Although many Epilepsy Monitoring Units work to certain standards, there is no national or international guideline for paediatric video telemetry. Due to lack of evidence we used a modified Delphi process utilizing the clinical and academic expertise of the clinical neurophysiology sub-specialty group of Children's Epilepsy Surgical Service (CESS) centres in England and Wales. This process consisted of the following stages I: Identification of the consensus working group, II: Identification of key areas for guidelines, III: Consensus practice points and IV: Final review. Statements that gained consensus (median score of either 4 or 5 using a five-point Likerttype scale) were included in the guideline. Two rounds of feedback and amendments were undertaken. The consensus guidelines includes the following topics: referral pathways, neurophysiological equipment standards, standards of recording techniques, with specific emphasis on safety of video EEG monitoring both with and without drug withdrawal, a protocol for testing patient's behaviours, data storage and guidelines for writing factual reports and conclusions. All statements developed received a median score of 5 and were adopted by the group. Using a modified Delphi process we were able to develop universally-accepted video EEG guidelines for the UK CESS. Although these recommendations have been specifically developed for the pre-surgical evaluation of children with epilepsy, it is assumed that most components are transferable to any paediatric video EEG monitoring setting. Copyright © 2017 British Epilepsy Association. Published by Elsevier Ltd. All rights reserved.

  14. Video quality assessment for web content mirroring

    Science.gov (United States)

    He, Ye; Fei, Kevin; Fernandez, Gustavo A.; Delp, Edward J.

    2014-03-01

    Due to the increasing user expectation on watching experience, moving web high quality video streaming content from the small screen in mobile devices to the larger TV screen has become popular. It is crucial to develop video quality metrics to measure the quality change for various devices or network conditions. In this paper, we propose an automated scoring system to quantify user satisfaction. We compare the quality of local videos with the videos transmitted to a TV. Four video quality metrics, namely Image Quality, Rendering Quality, Freeze Time Ratio and Rate of Freeze Events are used to measure video quality change during web content mirroring. To measure image quality and rendering quality, we compare the matched frames between the source video and the destination video using barcode tools. Freeze time ratio and rate of freeze events are measured after extracting video timestamps. Several user studies are conducted to evaluate the impact of each objective video quality metric on the subjective user watching experience.

  15. Evaluation of a biphasic in vitro dissolution test for estimating the bioavailability of carbamazepine polymorphic forms.

    Science.gov (United States)

    Deng, Jia; Staufenbiel, Sven; Bodmeier, Roland

    2017-07-15

    The purpose of this study was to discriminate three crystal forms of carbamazepine (a BCS II drug) by in vitro dissolution testing and to correlate in vitro data with published in vivo data. A biphasic dissolution system (phosphate buffer pH6.8 and octanol) was used to evaluate the dissolution of the three polymorphic forms and to compare it with conventional single phase dissolution tests performed under sink and non-sink conditions. Similar dissolution profiles of three polymorphic forms were observed in the conventional dissolution test under sink conditions. Although a difference in dissolution was seen in the single phase dissolution test under non-sink conditions as well as in the aqueous phase of the biphasic test, little relevance for in vivo data was observed. In contrast, the biphasic dissolution system could discriminate between the different polymorphic forms in the octanol phase with a ranking of form III>form I>dihydrate form. This was in agreement with the in vivo performance. The dissolved drug available for oral absorption, which was dominated by dissolution and solution-mediated phase transformation, could be reflected in the biphasic dissolution test. Moreover, a good correlation was established between in vitro dissolution in the octanol phase of the biphasic test and in vivo pharmacokinetic data (R(2)=0.99). The biphasic dissolution method is a valuable tool to discriminate between different crystal forms in the formulations of poorly soluble drugs. Copyright © 2017. Published by Elsevier B.V.

  16. Validity, Reliability, and Potential Bias of Short Forms of Students' Evaluation of Teaching: The Case of UAE University

    Science.gov (United States)

    Dodeen, Hamzeh

    2013-01-01

    Students' opinions continue to be a significant factor in the evaluation of teaching in higher education institutions. The purpose of this study was to psychometrically assess short students evaluation of teaching (SET) forms using the UAE University form as a model. The study evaluated the form validity, reliability, the overall question, and…

  17. Quality evaluation of the Finasteride polymorphic forms I and II in capsules.

    Science.gov (United States)

    da Silva, Lucélia Magalhães; Montanari, Cristina Martiniano; Santos, Olimpia Maria Martins; Cazedey, Edith Cristina Laignier; Ângelo, Marilene Lopes; de Araújo, Magali Benjamin

    2015-02-01

    Finasteride (FNS) is a specific competitive inhibitor of steroid type-II 5α-reductase and is widely used for the treatment of benign prostatic hyperplasia, prostate cancer, and androgenetic alopecia. FNS has two polymorphic forms identified as Form I and Form II. It is known that polymorphism can cause significant differences in the physicochemical properties of a compound such as melting point, density, morphology, solubility, and color. Thus, proper qualitative and quantitative monitoring of the solid-state forms is crucial to ensure high-quality products. There are no published papers studying the influence of the FNS polymorphs on the physicochemical quality of capsules. Furthermore, the available analytical methods are time-consuming, expensive, use buffer or do not demonstrate stability-indicating capacity. The aim of this work was to validate a rapid high-performance liquid chromatography (HPLC) method to evaluate FNS in capsules and to study the physicochemical properties of polymorphic forms, evaluating their possible influence in the dissolution profile and stability of FNS in capsules. Capsules containing Forms I and II of FNS were prepared and subjected to quality control studies, dissolution profiles and a stability study at 50°C. A significant effect of polymorphism on the FNS solubility and dissolution properties was observed. These results suggest that changes in the effects of FNS can occur if a suitable control study is not performed on the raw material used to produce the capsules. Copyright © 2014 Elsevier B.V. All rights reserved.

  18. Self-Assessment and Self-Evaluation in New Forms of Training Near the Workplace.

    Science.gov (United States)

    Geldermann, Brigitte

    The project Self-Assessment and Self-Evaluation in New Forms of Training near the Workplace--A Step Towards the Learning Organisation was undertaken in Bavaria, Germany, to help companies begin the process of becoming learning organizations by helping workers manage their own learning. The project is based on the following principles and…

  19. Evaluation and optimization of a force field for crystalline forms of mannitol and sorbitol

    NARCIS (Netherlands)

    de Waard, H; Amani, A; Kendrick, J; Hinrichs, W L J; Frijlink, H W; Anwar, J

    2010-01-01

    Two force fields, the GROMOS53A5/53A6 (united atom) and the AMBER95 (all atom) parameter sets, coupled with partial atomic charges derived from quantum mechanical calculations were evaluated for their ability to reproduce the known crystalline forms of the polyols mannitol and sorbitol. The force

  20. Syndrome dimensions of the Child Behavior Checklist and the Teacher Report Form : a critical empirical evaluation

    NARCIS (Netherlands)

    Hartman, CA; Hox, J; Auerbach, J; Erol, N; Fonseca, AC; Mellenbergh, GJ; Novik, TS; Oosterlaan, J; Roussos, AC; Shalev, RS; Zilber, N; Sergeant, JA

    1999-01-01

    The construct representation of the cross-informant model of the Child Behavior Checklist (CBCL) and the Teacher Report Form (TRF) was evaluated using confirmatory factor analysis. Samples were collected in seven different countries. The results are based on 13,226 parent ratings and 8893 teacher

  1. Preliminary Evaluation of the Childhood Experiences of Violence Questionnaire Short Form

    Science.gov (United States)

    Tanaka, Masako; Wekerle, Christine; Leung, Eman; Waechter, Randall; Gonzalez, Andrea; Jamieson, Ellen; MacMillan, Harriet L.

    2012-01-01

    Despite advances in child maltreatment research, accurate measurement of exposure remains a key issue. In this study, we evaluated a short form (CEVQ-SF) of the Childhood Experiences of Violence Questionnaire (CEVQ) in a sample of adolescents involved with child protection services in an urban city in Ontario, Canada. Focusing on the two most…

  2. Evaluating the Effectiveness of Video Instruction on Social and Communication Skills Training for Children with Autism Spectrum Disorders: A Review of the Literature

    Science.gov (United States)

    Shukla-Mehta, Smita; Miller, Trube; Callahan, Kevin J.

    2010-01-01

    Video instruction as an intervention for teaching skills to children with Autism Spectrum Disorders (ASD) is gaining increased momentum in applied settings.Video instruction, comprised of video modeling, video self-modeling, and point-of-view video, has been utilized in various fields of study with various populations and target behaviors.…

  3. A Neuromorphic System for Video Object Recognition

    Directory of Open Access Journals (Sweden)

    Deepak eKhosla

    2014-11-01

    Full Text Available Automated video object recognition is a topic of emerging importance in both defense and civilian applications. This work describes an accurate and low-power neuromorphic architecture and system for real-time automated video object recognition. Our system, Neuormorphic Visual Understanding of Scenes (NEOVUS, is inspired by recent findings in computational neuroscience on feed-forward object detection and classification pipelines for processing and extracting relevant information from visual data. The NEOVUS architecture is inspired by the ventral (what and dorsal (where streams of the mammalian visual pathway and combines retinal processing, form-based and motion-based object detection, and convolutional neural nets based object classification. Our system was evaluated by the Defense Advanced Research Projects Agency (DARPA under the NEOVISION2 program on a variety of urban area video datasets collected from both stationary and moving platforms. The datasets are challenging as they include a large number of targets in cluttered scenes with varying illumination and occlusion conditions. The NEOVUS system was also mapped to commercially available off-the-shelf hardware. The dynamic power requirement for the system that includes a 5.6Mpixel retinal camera processed by object detection and classification algorithms at 30 frames per second was measured at 21.7 Watts (W, for an effective energy consumption of 5.4 nanoJoules (nJ per bit of incoming video. In a systematic evaluation of five different teams by DARPA on three aerial datasets, the NEOVUS demonstrated the best performance with the highest recognition accuracy and at least three orders of magnitude lower energy consumption than two independent state of the art computer vision systems. These unprecedented results show that the NEOVUS has the potential to revolutionize automated video object recognition towards enabling practical low-power and mobile video processing applications.

  4. The development and evaluation of mini-GEMs - short, focused, online e-learning videos in geriatric medicine.

    Science.gov (United States)

    Garside, Mark J; Fisher, James M; Blundell, Adrian G; Gordon, Adam L

    2016-04-06

    Mini Geriatric E-Learning Modules (Mini-GEMs) are short, focused, e-learning videos on geriatric medicine topics, hosted on YouTube, which are targeted at junior doctors working with older people. This study aimed to explore how these resources are accessed and used. The authors analyzed the viewing data from 22 videos published over the first 18 months of the Mini-GEM project. We conducted a focus group of U.K. junior doctors considering their experiences with Mini-GEMS. The Mini-GEMs were viewed 10,291 times over 18 months, equating to 38,435 minutes of total viewing time. The average viewing time for each video was 3.85 minutes. Learners valued the brevity and focused nature of the Mini-GEMs and reported that they watched them in a variety of settings to supplement clinical experiences and consolidate learning. Watching the videos led to an increase in self-reported confidence in managing older patients. Mini-GEMs can effectively disseminate clinical teaching material to a wide audience. The videos are valued by junior doctors due to their accessibility and ease of use.

  5. Evaluation of a standardized morbidity surveillance form for use during disasters caused by natural hazards.

    Science.gov (United States)

    Schnall, Amy H; Wolkin, Amy F; Noe, Rebecca; Hausman, Leslie B; Wiersma, Petra; Soetebier, Karl; Cookson, Susan T

    2011-04-01

    Surveillance for health outcomes is critical for rapid responses and timely prevention of disaster-related illnesses and injuries after a disaster-causing event. The Disaster Surveillance Workgroup (DSWG) of the US Centers for Disease Control and Prevention developed a standardized, single-page, morbidity surveillance form, called the Natural Disaster Morbidity Surveillance Individual Form (Morbidity Surveillance Form), to describe the distribution of injuries and illnesses, detect outbreaks, and guide timely interventions during a disaster. Traditional data sources can be used during a disaster; however, supplemental active surveillance may be required because traditional systems often are disrupted, and many persons will seek care outside of typical acute care settings. Generally, these alternative settings lack health surveillance and reporting protocols. The need for standardized data collection was demonstrated during Hurricane Katrina, as the multiple surveillance instruments that were developed and deployed led to varied and uncoordinated data collection methods, analyses, and morbidity data reporting. Active, post-event surveillance of affected populations is critical for rapid responses to minimize and prevent morbidity and mortality, allocate resources, and target public health messaging. The CDC and the Georgia Department of Public Health (GDPH) conducted a study to evaluate a Morbidity Surveillance Form to determine its ability to capture clinical presentations. The form was completed for each patient evaluated in an emergency department (ED) during triage from 01 August, 2007 through 07 August, 2007. Data from the form were compared with the ED discharge diagnoses from electronic medical records, and kappa statistics were calculated to assess agreement. Nine hundred forty-nine patients were evaluated, 41% were male and 57% were Caucasian. According to the forms, the most common reasons for seeking treatment were acute illness, other (29%); pain (12

  6. Evaluation of resistance form of different preparation features on mandibular molars.

    Science.gov (United States)

    Farshad, Bajoghli; Ehsan, Ghasemi; Mahmoud, Sabouhi; Reza, Khodadadi; Mozhdeh, Behdarvand

    2013-01-01

    Resistance form of full metal-ceramic crown is an important feature that determines longevity of these restorations. This study evaluated the resistance form of full metal-ceramic prepared with four different design features. An acrylic tooth was prepared with 20° total occlusal convergence (TOC) angle, 2.5 mm of occlusocervical dimension and a shoulder finishing line. This design lacked resistance form. The crown preparation was subsequently modified by preparing Mesial Occlusal Distal isthmus, placing occlusal inclined plane, and reducing TOC. Four metal dies from these designs were constructed by lathe machine and then 10 metal copings were fabricated for each preparation. Metal coping were cemented on metal dies with temp-bond cement. Force was applied at 45° from lingual to buccal direction with universal testing machine. The data were evaluated by Kruskal-Wallis and non-parametric Mann-Whitney test. All features increased resistance form when compare to control group. However, reduce TOC group showed greatest value of resistance. Within the limitation of this study, reducing the tapering of occlusocervival dimension is the most effective way in increasing resistance form, although, other features were also effective.

  7. Evaluation of resistance form of different preparation features on mandibular molars

    Directory of Open Access Journals (Sweden)

    Bajoghli Farshad

    2013-01-01

    Full Text Available Aims: Resistance form of full metal-ceramic crown is an important feature that determines longevity of these restorations. This study evaluated the resistance form of full metal-ceramic prepared with four different design features. Materials and Methods: An acrylic tooth was prepared with 20° total occlusal convergence (TOC angle, 2.5 mm of occlusocervical dimension and a shoulder finishing line. This design lacked resistance form. The crown preparation was subsequently modified by preparing Mesial Occlusal Distal isthmus, placing occlusal inclined plane, and reducing TOC. Four metal dies from these designs were constructed by lathe machine and then 10 metal copings were fabricated for each preparation. Metal coping were cemented on metal dies with temp-bond cement. Force was applied at 45° from lingual to buccal direction with universal testing machine. Statistical analysis used: The data were evaluated by Kruskal-Wallis and non-parametric Mann-Whitney test. Results: All features increased resistance form when compare to control group. However, reduce TOC group showed greatest value of resistance. Conclusion: Within the limitation of this study, reducing the tapering of occlusocervival dimension is the most effective way in increasing resistance form, although, other features were also effective.

  8. Video summarization using line segments, angles and conic parts.

    Science.gov (United States)

    Salehin, Md Musfequs; Paul, Manoranjan; Kabir, Muhammad Ashad

    2017-01-01

    Video summarization is a process to extract objects and their activities from a video and represent them in a condensed form. Existing methods for video summarization fail to detect moving (dynamic) objects in the low color contrast area of a video frame due to the pixel intensities of objects and non-objects are almost similar. However, edges of objects are prominent in the low contrast regions. Moreover, to represent objects, geometric primitives (such as lines, arcs) are distinguishable and high level shape descriptors than edges. In this paper, a novel method is proposed for video summarization using geometric primitives such as conic parts, line segments and angles. Using these features, objects are extracted from each video frame. A cost function is applied to measure the dissimilarity of locations of geometric primitives to detect the movement of objects between consecutive frames. The total distance of object movement is calculated and each video frame is assigned a probability score. Finally, a set of key frames is selected based on the probability scores as per user provided skimming ratio or system default skimming ratio. The proposed approach is evaluated using three benchmark datasets-BL-7F, Office, and Lobby. The experimental results show that our approach outperforms the state-of-the-art method in terms of accuracy.

  9. Qos Performance Analysis : Design And Development Of Voice And Video Mobility Over Long Term Evaluation (Lte) Model

    OpenAIRE

    Mahmud, Shahrear; Chowdhury, Md.Sadat Hossain

    2014-01-01

    The evolution of 3G systems has contributed to a significant amount of progress towards 4th generation wireless technology, Long Term Evolution (LTE). On the other hand, demand for more bandwidth has been evidenced by the ever growing usage of real-time application such as video conference. For instance, users tend to have reliable and efficient connection when they are on the go maintaining the minimum quality of the video conference. In order to meet these challenges, QoS of LTE makes it an...

  10. Negotiation for Strategic Video Games

    OpenAIRE

    Afiouni, Einar Nour; Øvrelid, Leif Julian

    2013-01-01

    This project aims to examine the possibilities of using game theoretic concepts and multi-agent systems in modern video games with real time demands. We have implemented a multi-issue negotiation system for the strategic video game Civilization IV, evaluating different negotiation techniques with a focus on the use of opponent modeling to improve negotiation results.

  11. Teaching Idioms: Video or Lecture.

    Science.gov (United States)

    Kenyon, Patricia; Daly, Kimberly

    1991-01-01

    A study evaluated the effectiveness of video instruction in teaching the meanings and uses of idioms to 20 deaf adolescents. Students improved their knowledge and use of idioms more when exposed to the video/discussion approach than to the lecture/discussion approach. (DB)

  12. Akademisk video

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    2017-01-01

    Dette kapitel har fokus på metodiske problemstillinger, der opstår i forhold til at bruge (digital) video i forbindelse med forskningskommunikation, ikke mindst online. Video har længe været benyttet i forskningen til dataindsamling og forskningskommunikation. Med digitaliseringen og internettet er...... der dog opstået nye muligheder og udfordringer i forhold til at formidle og distribuere forskningsresultater til forskellige målgrupper via video. Samtidig er klassiske metodologiske problematikker som forskerens positionering i forhold til det undersøgte stadig aktuelle. Både klassiske og nye...... problemstillinger diskuteres i kapitlet, som rammesætter diskussionen ud fra forskellige positioneringsmuligheder: formidler, historiefortæller, eller dialogist. Disse positioner relaterer sig til genrer inden for ’akademisk video’. Afslutningsvis præsenteres en metodisk værktøjskasse med redskaber til planlægning...

  13. Toward a More Usable Home-Based Video Telemedicine System: A Heuristic Evaluation of the Clinician User Interfaces of Home-Based Video Telemedicine Systems.

    Science.gov (United States)

    Agnisarman, Sruthy; Narasimha, Shraddhaa; Chalil Madathil, Kapil; Welch, Brandon; Brinda, Fnu; Ashok, Aparna; McElligott, James

    2017-04-24

    Telemedicine is the use of technology to provide and support health care when distance separates the clinical service and the patient. Home-based telemedicine systems involve the use of such technology for medical support and care connecting the patient from the comfort of their homes with the clinician. In order for such a system to be used extensively, it is necessary to understand not only the issues faced by the patients in using them but also the clinician. The aim of this study was to conduct a heuristic evaluation of 4 telemedicine software platforms-Doxy.me, Polycom, Vidyo, and VSee-to assess possible problems and limitations that could affect the usability of the system from the clinician's perspective. It was found that 5 experts individually evaluated all four systems using Nielsen's list of heuristics, classifying the issues based on a severity rating scale. A total of 46 unique problems were identified by the experts. The heuristics most frequently violated were visibility of system status and Error prevention amounting to 24% (11/46 issues) each. Esthetic and minimalist design was second contributing to 13% (6/46 issues) of the total errors. Heuristic evaluation coupled with a severity rating scale was found to be an effective method for identifying problems with the systems. Prioritization of these problems based on the rating provides a good starting point for resolving the issues affecting these platforms. There is a need for better transparency and a more streamlined approach for how physicians use telemedicine systems. Visibility of the system status and speaking the users' language are keys for achieving this.

  14. 48 CFR 1553.209-71 - EPA Form 1900-27, Project Officer's Evaluation of Contractor Performance.

    Science.gov (United States)

    2010-10-01

    ... EPA Form 1900-27, Project Officer's Evaluation of Contractor Performance. As prescribed in 1509.170-4(a), EPA Form 1900-27 shall be used by the Project Officer to record his/her evaluation of Contractor... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true EPA Form 1900-27, Project...

  15. A novel video tracking method to evaluate the effect of influenza infection and antiviral treatment on ferret activity.

    Science.gov (United States)

    Oh, Ding Yuan; Barr, Ian G; Hurt, Aeron C

    2015-01-01

    Ferrets are the preferred animal model to assess influenza virus infection, virulence and transmission as they display similar clinical symptoms and pathogenesis to those of humans. Measures of disease severity in the ferret include weight loss, temperature rise, sneezing, viral shedding and reduced activity. To date, the only available method for activity measurement has been the assignment of an arbitrary score by a 'blind' observer based on pre-defined responsiveness scale. This manual scoring method is subjective and can be prone to bias. In this study, we described a novel video-tracking methodology for determining activity changes in a ferret model of influenza infection. This method eliminates the various limitations of manual scoring, which include the need for a sole 'blind' observer and the requirement to recognise the 'normal' activity of ferrets in order to assign relative activity scores. In ferrets infected with an A(H1N1)pdm09 virus, video-tracking was more sensitive than manual scoring in detecting ferret activity changes. Using this video-tracking method, oseltamivir treatment was found to ameliorate the effect of influenza infection on activity in ferret. Oseltamivir treatment of animals was associated with an improvement in clinical symptoms, including reduced inflammatory responses in the upper respiratory tract, lower body weight loss and a smaller rise in body temperature, despite there being no significant reduction in viral shedding. In summary, this novel video-tracking is an easy-to-use, objective and sensitive methodology for measuring ferret activity.

  16. Video Analytics

    DEFF Research Database (Denmark)

    This book collects the papers presented at two workshops during the 23rd International Conference on Pattern Recognition (ICPR): the Third Workshop on Video Analytics for Audience Measurement (VAAM) and the Second International Workshop on Face and Facial Expression Recognition (FFER) from Real...... World Videos. The workshops were run on December 4, 2016, in Cancun in Mexico. The two workshops together received 13 papers. Each paper was then reviewed by at least two expert reviewers in the field. In all, 11 papers were accepted to be presented at the workshops. The topics covered in the papers...

  17. Randomized controlled trial to evaluate the effectiveness of a video game as a child pedestrian educational tool.

    Science.gov (United States)

    Arbogast, Helen; Burke, Rita V; Muller, Valerie; Ruiz, Pearl; Knudson, M Margaret; Knudson, Margaret M; Upperman, Jeffrey S

    2014-05-01

    Injury is the number one cause of death and disability in children in the United States and an increasingly important public health problem globally. While prevention of injuries is an important goal, prevention efforts are currently fragmented, poorly funded, and rarely studied. Among school-aged children, pedestrian crashes are a major mechanism of injury. We hypothesized that we could develop a game-based educational tool that would be effective in teaching elementary school children the principles of pedestrian safety. Between November 2011 and June 2013, second- and third-grade children in Los Angeles Unified School District were randomly assigned to play a unique interactive video game (Ace's Adventure) about pedestrian safety or to a traditional didactic session about pedestrian safety. A pretest and posttest were administered to the study participants. Afterward, study participants were observed for appropriate pedestrian behavior on a simulated street set called Street Smarts. All statistical analyses were performed using SAS version 9.2. A total of 348 study participants took the pretest and posttest. There were 180 who were randomized to the didactic and 168 who were randomized to the video game. The didactic group demonstrated a higher mean score increase (1.01, p video game group (0.44, p video game, as compared with the didactic group, more frequently exhibited appropriate behavior during the following: exiting a parked car (p = 0.01), signaling to a car that was backing up (p = 0.01), signaling to a stopped car (p = 0.0002), and crossing the street (p = 0.01). Students who played the educational video game about pedestrian safety performed similarly to those who attended a more traditional and labor-intensive didactic learning. Innovative educational methods, such as game playing, could significantly change our approach to injury prevention and have the potential to decrease the burden of injury among children worldwide.

  18. Evaluation of Melanoidins Formed from Black Garlic after Different Thermal Processing Steps.

    Science.gov (United States)

    Kang, Ok-Ju

    2016-12-01

    The objective of this study was to evaluate the characteristics of melanoidins formed from black garlic (BG) after different thermal processing steps. The melanoidins formed from BG during thermal processing were produced in large amounts, and the initial (280 nm), intermediate (360 nm), and final stage product (420 nm) had similar tendencies. Compounds like degraded proteins, peptides, and phenolic acids were present in the melanoidins during thermal processing. All the melanoidin samples showed different absorptions in the UV-visible spectra, although these had similar shapes. Moreover, the carbon, hydrogen, and oxygen content of melanoidins formed from BG during thermal processing decreased initially, and then increased. However, the nitrogen content increased during thermal processing. As thermal processing progressed, the molecular weight of all the melanoidin samples showed increasing intensities, whereas the major peaks of each melanoidin sample had different retention times. Furthermore, the melanoidins formed from BG after different thermal processing steps contained -OH, -CH, amide I, and III groups. The crystallinity of the melanoidins was majorly formed at 31.58° and 43.62° (2θ).

  19. Watermarking textures in video games

    Science.gov (United States)

    Liu, Huajian; Berchtold, Waldemar; Schäfer, Marcel; Lieb, Patrick; Steinebach, Martin

    2014-02-01

    Digital watermarking is a promising solution to video game piracy. In this paper, based on the analysis of special challenges and requirements in terms of watermarking textures in video games, a novel watermarking scheme for DDS textures in video games is proposed. To meet the performance requirements in video game applications, the proposed algorithm embeds the watermark message directly in the compressed stream in DDS files and can be straightforwardly applied in watermark container technique for real-time embedding. Furthermore, the embedding approach achieves high watermark payload to handle collusion secure fingerprinting codes with extreme length. Hence, the scheme is resistant to collusion attacks, which is indispensable in video game applications. The proposed scheme is evaluated in aspects of transparency, robustness, security and performance. Especially, in addition to classical objective evaluation, the visual quality and playing experience of watermarked games is assessed subjectively in game playing.

  20. P2P Video Streaming Strategies based on Scalable Video Coding

    Directory of Open Access Journals (Sweden)

    F.A. López-Fuentes

    2015-02-01

    Full Text Available Video streaming over the Internet has gained significant popularity during the last years, and the academy and industry have realized a great research effort in this direction. In this scenario, scalable video coding (SVC has emerged as an important video standard to provide more functionality to video transmission and storage applications. This paper proposes and evaluates two strategies based on scalable video coding for P2P video streaming services. In the first strategy, SVC is used to offer differentiated quality video to peers with heterogeneous capacities. The second strategy uses SVC to reach a homogeneous video quality between different videos from different sources. The obtained results show that our proposed strategies enable a system to improve its performance and introduce benefits such as differentiated quality of video for clients with heterogeneous capacities and variable network conditions.

  1. Video Analytics

    DEFF Research Database (Denmark)

    This book collects the papers presented at two workshops during the 23rd International Conference on Pattern Recognition (ICPR): the Third Workshop on Video Analytics for Audience Measurement (VAAM) and the Second International Workshop on Face and Facial Expression Recognition (FFER) from Real W...

  2. Evaluating formability of LCP plate for sacral fractures with one step inverse forming finite element analysis.

    Science.gov (United States)

    Li, Xiaoda; Zhang, Xiangkui; Hu, Ping; Liu, Weijie; Shen, Guozhe; Zhan, Xianghui

    2015-01-01

    The locking compression plate fixation treatment for the unstable sacral fractures is simple and effective, with less trauma and complications. Some locking compression plate parts have been made of high-strength Plate manufactured by hot stamping process since the demand for lightweight biomedical materials. Finite Element (FE) method of One-Step inverse forming based on deformation theory is the tool to evaluate the formability of locking compression plate panel quickly in initial design for reducing costs and development cycle of Plate. But current one-step inverse forming methods are all suitable for cold stamping, not hot-stamping. This paper proposed one-step inverse forming method and workflow for hot-stamping of locking compression Plate. And the B pillar of a sacral bone was simulated and its computing result was compared with experimental value. The result shows that the proposed method in this paper can quickly evaluate high temperature formability of high-strength Plate. And the method is proposed to be used in initial design.

  3. Artificial Neural Networks in Evaluation and Optimization of Modified Release Solid Dosage Forms

    Directory of Open Access Journals (Sweden)

    Zorica Djurić

    2012-10-01

    Full Text Available Implementation of the Quality by Design (QbD approach in pharmaceutical development has compelled researchers in the pharmaceutical industry to employ Design of Experiments (DoE as a statistical tool, in product development. Among all DoE techniques, response surface methodology (RSM is the one most frequently used. Progress of computer science has had an impact on pharmaceutical development as well. Simultaneous with the implementation of statistical methods, machine learning tools took an important place in drug formulation. Twenty years ago, the first papers describing application of artificial neural networks in optimization of modified release products appeared. Since then, a lot of work has been done towards implementation of new techniques, especially Artificial Neural Networks (ANN in modeling of production, drug release and drug stability of modified release solid dosage forms. The aim of this paper is to review artificial neural networks in evaluation and optimization of modified release solid dosage forms.

  4. Evaluation of the Development pf Various Forms of Agriculture Cooperation in the Republic of Kazakhstan

    Directory of Open Access Journals (Sweden)

    Akimbekova Galiya

    2017-05-01

    Full Text Available The article analyzes the current situation in the agricultural complex of the Republic of Kazakhstan, the necessity of combining small farms in the cooperative structure, evaluation of existing forms of cooperatives in agriculture are substantiated (production cooperatives, rural consumer cooperatives, rural consumer cooperatives of water users, a map of their location in the context of regions of the country is shown, problems hindering their development are revealed, particularly the formation and development trends of each of them, the economic indicators of production of products are given, together with their organizational structure, etc. On the basis of the conducted analysis of the production conditions, rural consumers and rural consumer cooperatives of water users, problems hindering their development are revealed, the positive and negative trends in the development of various forms of agricultural cooperation are assessed, and proposals has been substantiated in order to improve the regulatory framework, mechanisms of state support, credit and financial mechanisms, etc.

  5. Estimation of Web video multiplicity

    Science.gov (United States)

    Cheung, SenChing S.; Zakhor, Avideh

    1999-12-01

    With ever more popularity of video web-publishing, many popular contents are being mirrored, reformatted, modified and republished, resulting in excessive content duplication. While such redundancy provides fault tolerance for continuous availability of information, it could potentially create problems for multimedia search engines in that the search results for a given query might become repetitious, and cluttered with a large number of duplicates. As such, developing techniques for detecting similarity and duplication is important to multimedia search engines. In addition, content providers might be interested in identifying duplicates of their content for legal, contractual or other business related reasons. In this paper, we propose an efficient algorithm called video signature to detect similar video sequences for large databases such as the web. The idea is to first form a 'signature' for each video sequence by selection a small number of its frames that are most similar to a number of randomly chosen seed images. Then the similarity between any tow video sequences can be reliably estimated by comparing their respective signatures. Using this method, we achieve 85 percent recall and precision ratios on a test database of 377 video sequences. As a proof of concept, we have applied our proposed algorithm to a collection of 1800 hours of video corresponding to around 45000 clips from the web. Our results indicate that, on average, every video in our collection from the web has around five similar copies.

  6. Social and Emotional Competencies Evaluation Questionnaire-Teacher's Version: Validation of a Short Form.

    Science.gov (United States)

    Coelho, Vitor A; Sousa, Vanda; Marchante, Marta

    2016-08-01

    The Social and Emotional Competencies Evaluation Questionnaire-Teacher's version, Short Form (QACSE-P-SF) allows teachers to assess their students' social and emotional competencies, having been designed for program evaluation. Thirty-nine teachers completed the QACSE-P-SF, regarding 657 students (fourth to ninth grades). Factor analyses supported a six-factor structure with acceptable internal consistency. Sex differences were found with teachers reporting girls as having higher scores on Self-Control, Social Awareness, Relationship Skills, and Responsible Decision Making. Developmental differences were also found with fourth-grade students presenting higher levels of Social Awareness and Relationship Skills than older students. The final version of the QACSE-P-SF is composed by 30 items, organized into six scales and less time consuming than the previous version for teachers who need to assess full classes. © The Author(s) 2016.

  7. Psychometric Evaluation of the Hypogonadism Impact of Symptoms Questionnaire Short Form (HIS-Q-SF).

    Science.gov (United States)

    Gelhorn, Heather L; Roberts, Laurie J; Khandelwal, Nikhil; Revicki, Dennis A; DeRogatis, Leonard R; Dobs, Adrian; Hepp, Zsolt; Miller, Michael G

    2017-08-01

    The Hypogonadism Impact of Symptoms Questionnaire Short Form (HIS-Q-SF) is a patient-reported outcome measurement designed to evaluate the symptoms of hypogonadism. The HIS-Q-SF is an abbreviated version including17 items from the original 28-item HIS-Q. To conduct item analyses and reduction, evaluate the psychometric properties of the HIS-Q-SF, and provide guidance on score interpretation. A 12-week observational longitudinal study of hypogonadal men was conducted as part of the original HIS-Q psychometric evaluation. Participants completed the original HIS-Q every 2 weeks. Blood samples were collected to evaluate testosterone levels. Participants completed the Aging Male's Symptoms Scale, the International Index of Erectile Function, the Short Form-12, and the PROMIS Sexual Activity, Satisfaction with Sex Life, Sleep Disturbance, and Applied Cognition Scales (baseline and weeks 6 and 12). Clinicians completed the Clinical Global Impression of Severity and Change scales and a clinical form. Item performance was evaluated using descriptive statistics and Rasch analyses. Reliability (internal consistency and test-retest), validity (concurrent and know groups), and responsiveness were assessed. One hundred seventy-seven men participated (mean age = 54.1 years, range = 23-83). Similar to the full HIS-Q, the final abbreviated HIS-Q-SF instrument includes five domains (sexual, energy, sleep, cognition, and mood) with two sexual subdomains (libido and sexual function). For key domains, test-retest reliability was very good, and construct validity was good for all domains. Known-groups validity was demonstrated for all domain scores, subdomain scores, and total score based on the Clinical Global Impression-Severity. All domains and subdomains were responsive to change based on patient-rated anchor questions. The HIS-Q-SF could be a useful tool in clinical practice, epidemiologic studies, and other academic research settings. Careful consideration was given to the

  8. Video Analytics

    DEFF Research Database (Denmark)

    This book collects the papers presented at two workshops during the 23rd International Conference on Pattern Recognition (ICPR): the Third Workshop on Video Analytics for Audience Measurement (VAAM) and the Second International Workshop on Face and Facial Expression Recognition (FFER) from Real...... include: re-identification, consumer behavior analysis, utilizing pupillary response for task difficulty measurement, logo detection, saliency prediction, classification of facial expressions, face recognition, face verification, age estimation, super-resolution, pose estimation, and pain recognition...

  9. Video Analytics

    DEFF Research Database (Denmark)

    include: re-identification, consumer behavior analysis, utilizing pupillary response for task difficulty measurement, logo detection, saliency prediction, classification of facial expressions, face recognition, face verification, age estimation, super-resolution, pose estimation, and pain recognition......This book collects the papers presented at two workshops during the 23rd International Conference on Pattern Recognition (ICPR): the Third Workshop on Video Analytics for Audience Measurement (VAAM) and the Second International Workshop on Face and Facial Expression Recognition (FFER) from Real...

  10. Psychometric evaluation and short form development of The Balanced Inventory of Desirable Responding (BIDR-6

    Directory of Open Access Journals (Sweden)

    Subotić Siniša

    2016-01-01

    Full Text Available The goals of this research were to evaluate the Bosnian-Croatian-Serbian (BCS translation of the BIDR-6 scale, develop its short form, and to present its initial convergent/discriminative validation. The sample included 827 participants. MIRT CFA analysis revealed that fourfactor model (containing 32/40 items fits the data best, with Self-Deceptive Enhancement (SDE and Impression Management (IM both splitting into the denial (SD-D and IM-D and enhancement (SD-E and IM-E factors. Fit and item properties were generally mediocre. SD-D and IM-E subscales were the strongest sources of misfit, thus SD-E and IM-D subscales were retained in the short form, which had good fit and replicated almost all main patterns of associations with other variables of interest (e.g., HEXACO personality traits typically reported for the full SDE and IM scales in other research. Thus, 17-item BIDR-6 short form, containing only SD-E and IM-D subscales, is recommended for use in the BCS speaking area.

  11. Developing an accessible video player

    Directory of Open Access Journals (Sweden)

    Juan José Rodríguez Soler

    2012-05-01

    Full Text Available Online Channels in financial institutions allows customers with disabilities to access services in a convenient way for them.However, one of the current challenges of this sector is to improve web accessibility and to incorporate technological resources to provide access to multimedia and video content, which has become a new form of internet communication.The present work shows in detail the strategy followed when designing and developing the new video player used by Bankinter for these purposes.

  12. Evaluation of final waste forms and recommendations for baseline alternatives to group and glass

    Energy Technology Data Exchange (ETDEWEB)

    Bleier, A.

    1997-09-01

    An assessment of final waste forms was made as part of the Federal Facilities Compliance Agreement/Development, Demonstration, Testing, and Evaluation (FFCA/DDT&E) Program because supplemental waste-form technologies are needed for the hazardous, radioactive, and mixed wastes of concern to the Department of Energy and the problematic wastes on the Oak Ridge Reservation. The principal objective was to identify a primary waste-form candidate as an alternative to grout (cement) and glass. The effort principally comprised a literature search, the goal of which was to establish a knowledge base regarding four areas: (1) the waste-form technologies based on grout and glass, (2) candidate alternatives, (3) the wastes that need to be immobilized, and (4) the technical and regulatory constraints on the waste-from technologies. This report serves, in part, to meet this goal. Six families of materials emerged as relevant; inorganic, organic, vitrified, devitrified, ceramic, and metallic matrices. Multiple members of each family were assessed, emphasizing the materials-oriented factors and accounting for the fact that the two most prevalent types of wastes for the FFCA/DDT&E Program are aqueous liquids and inorganic sludges and solids. Presently, no individual matrix is sufficiently developed to permit its immediate implementation as a baseline alternative. Three thermoplastic materials, sulfur-polymer cement (inorganic), bitumen (organic), and polyethylene (organic), are the most technologically developed candidates. Each warrants further study, emphasizing the engineering and economic factors, but each also has limitations that regulate it to a status of short-term alternative. The crystallinity and flexible processing of sulfur provide sulfur-polymer cement with the highest potential for short-term success via encapsulation. Long-term immobilization demands chemical stabilization, which the thermoplastic matrices do not offer. Among the properties of the remaining

  13. Development and Test Evaluations for Ni-DOBDC Metal Organic Framework (MOF) Engineered Forms

    Energy Technology Data Exchange (ETDEWEB)

    Troy G. Garn; Mitchell Greenhalgh

    2013-07-01

    A joint effort to prepare engineered forms of a Ni-DOBDC metal organic framework (MOF) was completed with contributions from PNNL, SNL and the INL. Two independent methods were used at INL and SNL to prepare engineered form (EF) sorbents from Ni-DOBDC MOF powder developed and prepared at PNNL. Xe and Kr capacity test evaluations were performed at ambient temperature with the cryostat experimental setup at INL. The initial INL EF MOF test results indicated a Xe capacity of 1.6 mmol/kg sorbent and no Kr capacity. A large loss of surface area also occurred during minimal testing rendering the INL EF MOF unusable. Four capacity tests were completed using the SNL EF MOF at ambient temperature and resulted in Xe capacities of 1.4, 4.2, 5.0 and 3.8 mmol/kg sorbent with no Kr capacity observed in any ambient temperature tests. Two additional capacity tests were performed at 240 K to further evaluate SNL EF MOF performance. Xe capacities of 50.7 and 49.3 mmol/kg of sorbent and Kr capacities of 0.77 and 0.69 mmol/kg of sorbent were obtained, respectively. Following the adsorption evaluations, the SNL EF MOF material had lost about 40 % of the initial mass and 40 % of the initial surface area. In general, the Xe capacity results at ambient temperature for the INL and SNL EF Ni-DOBDC MOF’s were lower than 9.8 mmol Xe/kg sorbent test results reported by INL in FY-12 using PNNL’s inital EF supplied material.

  14. Comparison between the IT-MAIS and MUSS questionnaires with video-recording for evaluation of children who may receive a cochlear implantation.

    Science.gov (United States)

    Pinto, Elaine Soares Monteiro; Lacerda, Cristina Broglia de Feitosa; Porto, Paulo Rogério Catanhede

    2008-01-01

    There is a great difficulty in determining earlier on which children would benefit or not from cochlear implants, especially because of their young age, the responses they give are very subtle. To compare results obtained through video-recording of the interactions of children who may receive a cochlear implant with the results obtained through evaluation protocols. Seven children, with an average age of 39.7 months, with profound hearing loss were selected for the study. IT-MAIS and MUSS questionnaires were given to their parents/guardians of these children and the results were compared with the observation of the video-recordings. It was possible to observe that the data is compatible with the auditory stages. However, the MUSS questionnaire data gathered during playful activities is very different . The questionnaire only takes into consideration the use of verbal language and therefore the majority of the evaluated children inevitably score low. Observing children play allows us to trace a better profile of linguistic behavior and aspects relative to language, that may presented differences in the questionnaire.

  15. Reliability of video-based identification of footstrike pattern and video time frame at initial contact in recreational runners

    DEFF Research Database (Denmark)

    Damsted, Camma; Larsen, L H; Nielsen, R.O.

    2015-01-01

    and video time frame at initial contact during treadmill running using two-dimensional (2D) video recordings. METHODS: Thirty-one recreational runners were recorded twice, 1 week apart, with a high-speed video camera. Two blinded raters evaluated each video twice with an interval of at least 14 days...

  16. Residual stress evaluation and curvature behavior of aluminium 7050 peen forming processed; Avaliacao da tensao residual em aluminio 7050 conformado pelo processo peen forming

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, R.R. de; Lima, N.B., E-mail: rolivier@ipen.b, E-mail: nblima@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Braga, A.P.V.; Goncalves, M., E-mail: anapaola@ipt.b, E-mail: mgoncalves@ipt.b [Instituto de Pesquisas Tecnologicas (IPT), Sao Paulo, SP (Brazil)

    2010-07-01

    Shot peening is a superficial cold work process used to increase the fatigue life evaluated by residual stress measurements. The peen forming process is a variant of the shot peening process, where a curvature in the plate is obtained by the compression of the grains near to the surface. In this paper, the influence of the parameters such as: pressure of shot, ball shot size and thickness of aluminum 7050 samples with respect to residual stress profile and resulting arc height was studied. The evaluation of the residual stress profile was obtained by sin{sup 2} {Psi} method. (author)

  17. Complementing Operating Room Teaching With Video-Based Coaching.

    Science.gov (United States)

    Hu, Yue-Yung; Mazer, Laura M; Yule, Steven J; Arriaga, Alexander F; Greenberg, Caprice C; Lipsitz, Stuart R; Gawande, Atul A; Smink, Douglas S

    2017-04-01

    Surgical expertise demands technical and nontechnical skills. Traditionally, surgical trainees acquired these skills in the operating room; however, operative time for residents has decreased with duty hour restrictions. As in other professions, video analysis may help maximize the learning experience. To develop and evaluate a postoperative video-based coaching intervention for residents. In this mixed methods analysis, 10 senior (postgraduate year 4 and 5) residents were videorecorded operating with an attending surgeon at an academic tertiary care hospital. Each video formed the basis of a 1-hour one-on-one coaching session conducted by the operative attending; although a coaching framework was provided, participants determined the specific content collaboratively. Teaching points were identified in the operating room and the video-based coaching sessions; iterative inductive coding, followed by thematic analysis, was performed. Teaching points made in the operating room were compared with those in the video-based coaching sessions with respect to initiator, content, and teaching technique, adjusting for time. Among 10 cases, surgeons made more teaching points per unit time (63.0 vs 102.7 per hour) while coaching. Teaching in the video-based coaching sessions was more resident centered; attendings were more inquisitive about residents' learning needs (3.30 vs 0.28, P = .04), and residents took more initiative to direct their education (27% [198 of 729 teaching points] vs 17% [331 of 1977 teaching points], P coaching is a novel and feasible modality for supplementing intraoperative learning. Objective evaluation demonstrates that video-based coaching may be particularly useful for teaching higher-level concepts, such as decision making, and for individualizing instruction and feedback to each resident.

  18. Evaluation of the DTBird video-system at the Smoela wind-power plant. Detection capabilities for capturing near-turbine avian behaviour

    Energy Technology Data Exchange (ETDEWEB)

    Roel, May; Hamre, Oeyvind; Vang, Roald; Nygaard, Torgeir

    2012-07-01

    Collisions between birds and wind turbines can be a problem at wind-power plants both onshore and offshore, and the presence of endangered bird species or proximity to key functional bird areas can have major impact on the choice of site or location wind turbines. There is international consensus that one of the mail challenges in the development of measures to reduce bird collisions is the lack of good methods for assessment of the efficacy of inventions. In order to be better abe to assess the efficacy of mortality-reducing measures Statkraft wishes to find a system that can be operated under Norwegian conditions and that renders objective and quantitative information on collisions and near-flying birds. DTbird developed by Liquen Consultoria Ambiental S.L. is such a system, which is based on video-recording bird flights near turbines during the daylight period (light levels>200 lux). DTBird is a self-working system developed to detect flying birds and to take programmed actions (i.e. warming, dissuasion, collision registration, and turbine stop control) linked to real-time bird detection. This report evaluates how well the DTBird system is able to detect birds in the vicinity of a wind turbine, and assess to which extent it can be utilized to study near-turbine bird flight behaviour and possible deterrence. The evaluation was based on the video sequence recorded with the DTBird systems installed at turbine 21 and turbine 42 at the Smoela wind-power plant between March 2 2012 and September 30 2012, together with GPS telemetry data on white-tailed eagles and avian radar data. The average number of falsely triggered video sequences (false positive rate) was 1.2 per day, and during daytime the DTBird system recorded between 76% and 96% of all bird flights in the vicinity of the turbines. Visually estimated distances of recorded bird flights in the video sequences were in general assessed to be farther from the turbines com pared to the distance settings used within

  19. Student perceptions of a video-based blended learning approach for improving pediatric physical examination skills.

    Science.gov (United States)

    Lehmann, Ronny; Seitz, Anke; Bosse, Hans Martin; Lutz, Thomas; Huwendiek, Sören

    2016-11-01

    Physical examination skills are crucial for a medical doctor. The physical examination of children differs significantly from that of adults. Students often have only limited contact with pediatric patients to practice these skills. In order to improve the acquisition of pediatric physical examination skills during bedside teaching, we have developed a combined video-based training concept, subsequently evaluating its use and perception. Fifteen videos were compiled, demonstrating defined physical examination sequences in children of different ages. Students were encouraged to use these videos as preparation for bedside teaching during their pediatric clerkship. After bedside teaching, acceptance of this approach was evaluated using a 10-item survey, asking for the frequency of video use and the benefits to learning, self-confidence, and preparation of bedside teaching as well as the concluding OSCE. N=175 out of 299 students returned survey forms (58.5%). Students most frequently used videos, either illustrating complete examination sequences or corresponding focus examinations frequently assessed in the OSCE. Students perceived the videos as a helpful method of conveying the practical process and preparation for bedside teaching as well as the OSCE, and altogether considered them a worthwhile learning experience. Self-confidence at bedside teaching was enhanced by preparation with the videos. The demonstration of a defined standardized procedural sequence, explanatory comments, and demonstration of infrequent procedures and findings were perceived as particularly supportive. Long video segments, poor alignment with other curricular learning activities, and technical problems were perceived as less helpful. Students prefer an optional individual use of the videos, with easy technical access, thoughtful combination with the bedside teaching, and consecutive standardized practice of demonstrated procedures. Preparation with instructional videos combined with bedside

  20. Student Practice Evaluation Form-Revised Edition online comment bank: development and reliability analysis.

    Science.gov (United States)

    Rodger, Sylvia; Turpin, Merrill; Copley, Jodie; Coleman, Allison; Chien, Chi-Wen; Caine, Anne-Maree; Brown, Ted

    2014-08-01

    The reliable evaluation of occupational therapy students completing practice education placements along with provision of appropriate feedback is critical for both students and for universities from a quality assurance perspective. This study describes the development of a comment bank for use with an online version of the Student Practice Evaluation Form-Revised Edition (SPEF-R Online) and investigates its reliability. A preliminary bank of 109 individual comments (based on previous students' placement performance) was developed via five stages. These comments reflected all 11 SPEF-R domains. A purpose-designed online survey was used to examine the reliability of the comment bank. A total of 37 practice educators returned surveys, 31 of which were fully completed. Participants were asked to rate each individual comment using the five-point SPEF-R rating scale. One hundred and two of 109 comments demonstrated satisfactory agreement with their respective default ratings that were determined by the development team. At each domain level, the intra-class correlation coefficients (ranging between 0.86 and 0.96) also demonstrated good to excellent inter-rater reliability. There were only seven items that required rewording prior to inclusion in the final SPEF-R Online comment bank. The development of the SPEF-R Online comment bank offers a source of reliable comments (consistent with the SPEF-R rating scale across different domains) and aims to assist practice educators in providing reliable and timely feedback to students in a user-friendly manner. © 2014 Occupational Therapy Australia.

  1. Evaluation and prevention of the precipitate formed on interaction between sodium hypochlorite and chlorhexidine.

    Science.gov (United States)

    Krishnamurthy, Shashikala; Sudhakaran, Sunu

    2010-07-01

    The purpose of this study was (1) to evaluate maximum thickness the and chemical composition of the precipitate formed between sodium hypochlorite (NaOCl) and chlorhexidine (CHX) and (2) to evaluate effectiveness of absolute alcohol to remove residual NaOCl and thereby prevent the formation of the precipitate. Forty extracted single-rooted human teeth were decoronated, and the canals were instrumented. In the test group (Ts group), canals were irrigated with 17% EDTA and 2.5% NaOCl followed by 2% CHX. In the absolute alcohol (Aba), saline (Sa), and distilled water (Dw) groups, intermediate flushes of absolute alcohol, saline, and distilled water were used between the last two irrigants. Teeth were sectioned longitudinally and subjected to stereomicroscopic examination. The Ts group samples showed orange-brown precipitate, concentrated more in the coronal and middle thirds, whereas the Aba group showed no evidence of precipitate. The Sal and Dw groups showed minimal precipitate in the coronal and middle thirds. The thickness of the precipitate was measured using the ProgRes computer software (Olympus, Hamburg, Germany). The chemical composition of the precipitate was confirmed by Beilstein and HCl tests, and the nuclear magnetic resonance imaging technique confirmed chlorine in the para position of the benzene ring. The interaction between NaOCl and CHX resulted in an insoluble neutral salt as a precipitate that can be prevented using absolute alcohol and minimized using saline and distilled water as intermediate flushes. Copyright 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  2. Initial Evaluation of Processing Methods for an Epsilon Metal Waste Form

    Energy Technology Data Exchange (ETDEWEB)

    Crum, Jarrod V.; Strachan, Denis M.; Zumhoff, Mac R.

    2012-06-11

    During irradiation of nuclear fuel in a reactor, the five metals, Mo, Pd, Rh, Ru, and Tc, migrate to the fuel grain boundaries and form small metal particles of an alloy known as epsilon metal ({var_epsilon}-metal). When the fuel is dissolved in a reprocessing plant, these metal particles remain behind with a residue - the undissolved solids (UDS). Some of these same metals that comprise this alloy that have not formed the alloy are dissolved into the aqueous stream. These metals limit the waste loading for a borosilicate glass that is being developed for the reprocessing wastes. Epsilon metal is being developed as a waste form for the noble metals from a number of waste streams in the aqueous reprocessing of used nuclear fuel (UNF) - (1) the {var_epsilon}-metal from the UDS, (2) soluble Tc (ion-exchanged), and (3) soluble noble metals (TRUEX raffinate). Separate immobilization of these metals has benefits other than allowing an increase in the glass waste loading. These materials are quite resistant to dissolution (corrosion) as evidenced by the fact that they survive the chemically aggressive conditions in the fuel dissolver. Remnants of {var_epsilon}-metal particles have survived in the geologically natural reactors found in Gabon, Africa, indicating that they have sufficient durability to survive for {approx} 2.5 billion years in a reducing geologic environment. Additionally, the {var_epsilon}-metal can be made without additives and incorporate sufficient foreign material (oxides) that are also present in the UDS. Although {var_epsilon}-metal is found in fuel and Gabon as small particles ({approx}10 {micro}m in diameter) and has survived intact, an ideal waste form is one in which the surface area is minimized. Therefore, the main effort in developing {var_epsilon}-metal as a waste form is to develop a process to consolidate the particles into a monolith. Individually, these metals have high melting points (2617 C for Mo to 1552 C for Pd) and the alloy is

  3. In situ forming chitosan hydrogels: Preliminary evaluation of the in vivo inflammatory response.

    Science.gov (United States)

    Moura, Maria José; Brochado, João; Gil, Maria Helena; Figueiredo, Maria Margarida

    2017-06-01

    This study aims to provide important preliminary in vivo data on the general biocompatibility and degradation of in situ forming chitosan hydrogels which differ in the type of cross-linking: physical cross-linking (with glycerol phosphate disodium salt) and physico/chemical co-cross-linking (with glycerol phosphate disodium salt and genipin). Additionally, in vitro degradation studies, using lysozyme, were conducted for comparison. The subcutaneous implantation of the liquid formulations of both hydrogels in animal model (Wistar rats) was performed to assess tissue response at the end of two time periods (8 and 30days). Although the properties of both hydrogels are different (namely, pore size and mechanical strength), leading to remarkably distinct in vitro degradation behaviors, the in vivo degradation is quite similar for both types. Regarding biocompatibility, the in vivo evaluation performed by histological analysis, showed a mild to moderate chronic inflammatory reaction with no foreign body reaction, demonstrating that both hydrogels show good results for in vivo biodegradation and biocompatibility, therefore are most adequate for biomedical applications. Copyright © 2017 Elsevier B.V. All rights reserved.

  4. Evaluation of the Biocidal Efficacy of Different Forms of Silver Against Cupriavidus (formerly Wautersia) Species Bacteria

    Science.gov (United States)

    Gazda, Daniel B.; Schultz, John R.; Wong, Wing; Algate, Michelle T.; Bryant, Becky; Castro, Victoria A.

    2009-01-01

    Contingency Water Containers (CWCs) are used to store potable and technical water that is transferred to the International Space Station (ISS) from the Shuttle orbiter vehicles. When CWCs are filled, water from the orbiter galley is passed through an ion exchange/activated carbon cartridge that removes the residual iodine biocide used on Shuttle before silver biocide is added. Removal of iodine and addition of silver is necessary to inhibit microbial growth inside CWCs and maintain compatibility with the water systems in the Russian segment of ISS. As part of nominal water transfer activities, crewmembers collect samples from several CWCs for postflight analysis. Results from the analysis of water transfer samples collected during the docked phases of STS-118/13A.1 and STS-120/10A showed that several of the CWCs contained up to 10(exp 4) CFU/mL of bacteria despite the fact that the silver concentrations in the CWCs were within acceptable limits. The samples contained pure cultures of a single bacteria, a Cupriavidus (formerly Wautersia) species that has been shown to be resistant to metallic biocides. As part of the investigation into the cause and remediation of the bacterial contamination in these CWCs, ground studies were initiated to evaluate the resistance of the Cupriavidus species to the silver biocides used on ISS and to determine the minimum effective concentration for the different forms of silver present in the biocides. The initial findings from those experiments are discussed herein.

  5. Evaluation of some organic compounds on bloodstream forms of Trypanosoma cruzi

    Directory of Open Access Journals (Sweden)

    João S. Silva

    1992-09-01

    Full Text Available Accidental transmission of Chagas' disease to man by blood transfusion is a serious problem in Latin-America. This paper describes the testing of several synthetic, semi-synthetic, and natural compounds for their activity against blood trypomastigotes in vitro at 4-C. The compounds embody several types of chemical structures: benzoquinone, naphthoquinone, anthracenequinone, phenanthrenequinone, imidazole, piperazine, quinoline, xanthene, and simple benzenic and naphthalenic derivates. Some of them are for the first time tested against Trypanosoma cruzi. The toxic effect these compounds on this parasite was done by two quite distinct sets of experiments. In one set, the compounds were added to infected blood as ethanolic solution. In this situation the most active one was a furan-1, 2-naphthoquinone, in the same range as gentian violet, a new fact to be considered in the assessment of structure-activity relationships in this class of compounds. In other set, we tentatively evaluated the biological activity of water insoluble compounds by adding them in a pure form without solvent into infected blood. In this way some appear to be very active and it was postulated that the effectiveness of such compounds must result from interactions between them and specific blood components.

  6. Evaluating the presence of Toxoplasma gondii in peripheral blood of patients with diverse forms of uveitis.

    Science.gov (United States)

    Belfort, Rubens N; Isenberg, Jordan; Fernandes, Bruno F; Di Cesare, Sebastian; Belfort, Rubens; Burnier, Miguel N

    2017-02-01

    The purpose of this study was to evaluate the presence of Toxoplasmosis gondii in samples of peripheral blood from patients with varying etiologies of uveitis. Whole blood from patients with different forms of uveitis was tested for the presence of T. gondii using real-time PCR targeting the well-characterized 529 bp fragment. Extracted DNA was both frozen. Thirty-one patients were included in the current study and grouped as follows: acute toxoplasmosis (n = 10); toxoplasmic retinal scars (n = 9); non-infectious etiologies of uveitis (n = 6); and IgG negative for toxoplasmosis (n = 6). In total, only two patients were shown to have circulating T. gondii in peripheral blood; both of these patients were IgG positive for toxoplasmosis, were receiving immunosuppressive therapy for autoimmune uveitis, and had no clinical features of toxoplasmosis. T. gondii was identified in peripheral blood of some immunosuppressed patients. No other patients, including those with acute toxoplasmosis, had circulating parasites in peripheral blood.

  7. Are violent video games harmful?

    Science.gov (United States)

    Porter, Guy; Starcevic, Vladan

    2007-10-01

    The aim of this paper is to revisit the controversial issue of the association of violent video games and aggressive behaviour. Several lines of evidence suggest that there is a link between exposure to violent video games and aggressive behaviour. However, methodological shortcomings of research conducted so far make several interpretations of this relationship possible. Thus, aggressive behaviour may be a consequence of playing violent video games, an expression of hostile traits that existed before exposure to these games, and/or it may be a result of several possible combinations of these and other factors. Mental health professionals need to be aware of these potentially negative effects of violent video games when assessing patients who present with aggression. There is a need for prospective, long-term studies similar to those evaluating the effects of television and film violence on children and adolescents.

  8. Evaluating Statistical Targets for Assembling Parallel Mixed-Format Test Forms

    Science.gov (United States)

    Debeer, Dries; Ali, Usama S.; van Rijn, Peter W.

    2017-01-01

    Test assembly is the process of selecting items from an item pool to form one or more new test forms. Often new test forms are constructed to be parallel with an existing (or an ideal) test. Within the context of item response theory, the test information function (TIF) or the test characteristic curve (TCC) are commonly used as statistical…

  9. Evaluating sub-lethal effects of orchard-applied pyrethroids using video-tracking software to quantify honey bee behaviors.

    Science.gov (United States)

    Ingram, Erin M; Augustin, Julie; Ellis, Marion D; Siegfried, Blair D

    2015-09-01

    Managed honey bee, Apis mellifera L., colonies are contracted to pollinate fruit and nut orchards improving crop quality and yield. Colonies placed in orchards are potentially exposed to pyrethroid insecticides used for broad-spectrum pest control. Pyrethroids have been reported to pose minimal risk to bees due to their low application rates in the field and putative repellent properties. This repellency is believed to alter foraging behavior with the benefit of preventing bees from encountering a lethal dose in the field. However, sub-lethal exposure to pyrethroids may adversely impact bee behavior potentially resulting in social dysfunction or disruption of foraging. This study quantified behaviors associated with sub-lethal exposure to orchard-applied pyrethroids including, lambda-cyhalothrin, esfenvalerate, and permethrin, using video tracking software, Ethovision XT (Noldus Information Technologies). Bee locomotion, social interaction, and time spent near a food source were measured over a 24-h period. Bees treated with a pyrethroid traveled 30-71% less than control bees. Social interaction time decreased by 43% for bees treated with a high sub-lethal dose of esfenvalerate. Bees exposed to a high sub-lethal dose of permethrin spent 67% less time in social interaction and spent more than 5 times as long in the food zone compared to control bees. Copyright © 2015 Elsevier Ltd. All rights reserved.

  10. Videography-Based Unconstrained Video Analysis.

    Science.gov (United States)

    Li, Kang; Li, Sheng; Oh, Sangmin; Fu, Yun

    2017-05-01

    Video analysis and understanding play a central role in visual intelligence. In this paper, we aim to analyze unconstrained videos, by designing features and approaches to represent and analyze videography styles in the videos. Videography denotes the process of making videos. The unconstrained videos are defined as the long duration consumer videos that usually have diverse editing artifacts and significant complexity of contents. We propose to construct a videography dictionary, which can be utilized to represent every video clip as a sequence of videography words. In addition to semantic features, such as foreground object motion and camera motion, we also incorporate two novel interpretable features to characterize videography, including the scale information and the motion correlations. We then demonstrate that, by using statistical analysis methods, the unique videography signatures extracted from different events can be automatically identified. For real-world applications, we explore the use of videography analysis for three types of applications, including content-based video retrieval, video summarization (both visual and textual), and videography-based feature pooling. In the experiments, we evaluate the performance of our approach and other methods on a large-scale unconstrained video dataset, and show that the proposed approach significantly benefits video analysis in various ways.

  11. NEI You Tube Videos: Amblyopia

    Medline Plus

    Full Text Available ... NEI YouTube Videos > NEI YouTube Videos: Amblyopia NEI YouTube Videos YouTube Videos Home Age-Related Macular Degeneration ... Retinopathy of Prematurity Science Spanish Videos Webinars NEI YouTube Videos: Amblyopia Embedded video for NEI YouTube Videos: ...

  12. NEI You Tube Videos: Amblyopia

    Medline Plus

    Full Text Available ... YouTube Videos > NEI YouTube Videos: Amblyopia NEI YouTube Videos YouTube Videos Home Age-Related Macular Degeneration Amblyopia ... of Prematurity Science Spanish Videos Webinars NEI YouTube Videos: Amblyopia Embedded video for NEI YouTube Videos: Amblyopia ...

  13. NEI You Tube Videos: Amblyopia

    Science.gov (United States)

    ... YouTube Videos > NEI YouTube Videos: Amblyopia NEI YouTube Videos YouTube Videos Home Age-Related Macular Degeneration Amblyopia ... of Prematurity Science Spanish Videos Webinars NEI YouTube Videos: Amblyopia Embedded video for NEI YouTube Videos: Amblyopia ...

  14. Fall Detection for Elderly from Partially Observed Depth-Map Video Sequences Based on View-Invariant Human Activity Representation

    Directory of Open Access Journals (Sweden)

    Rami Alazrai

    2017-03-01

    Full Text Available This paper presents a new approach for fall detection from partially-observed depth-map video sequences. The proposed approach utilizes the 3D skeletal joint positions obtained from the Microsoft Kinect sensor to build a view-invariant descriptor for human activity representation, called the motion-pose geometric descriptor (MPGD. Furthermore, we have developed a histogram-based representation (HBR based on the MPGD to construct a length-independent representation of the observed video subsequences. Using the constructed HBR, we formulate the fall detection problem as a posterior-maximization problem in which the posteriori probability for each observed video subsequence is estimated using a multi-class SVM (support vector machine classifier. Then, we combine the computed posteriori probabilities from all of the observed subsequences to obtain an overall class posteriori probability of the entire partially-observed depth-map video sequence. To evaluate the performance of the proposed approach, we have utilized the Kinect sensor to record a dataset of depth-map video sequences that simulates four fall-related activities of elderly people, including: walking, sitting, falling form standing and falling from sitting. Then, using the collected dataset, we have developed three evaluation scenarios based on the number of unobserved video subsequences in the testing videos, including: fully-observed video sequence scenario, single unobserved video subsequence of random lengths scenarios and two unobserved video subsequences of random lengths scenarios. Experimental results show that the proposed approach achieved an average recognition accuracy of 93 . 6 % , 77 . 6 % and 65 . 1 % , in recognizing the activities during the first, second and third evaluation scenario, respectively. These results demonstrate the feasibility of the proposed approach to detect falls from partially-observed videos.

  15. Return of the Vision Video

    DEFF Research Database (Denmark)

    Vistisen, Peter; Poulsen, Søren Bolvig

    2017-01-01

    This paper examines the role of corporate vision videos as a possible setting for participation when exploring the future potentials (and pitfalls) of new technological concepts. We propose that through the recent decade’s rise web 2.0 platforms, and the viral effects of user sharing, the corporate...... vision video of today might take on a significantly different role than before, and act as a participatory design approach. This address the changing landscaping for participatory and user-involved design processes, in the wake of new digital forms of participation, communication and collaboration, which...... have radically changed the possible power dynamics of the production life cycle of new product developments. Through a case study, we pose the question of whether the online engagements around corporate vision videos can be viewed as a form of participation in a design process, and thus revitalize...

  16. The Extended-OPQ Method for User-Centered Quality of Experience Evaluation: A Study for Mobile 3D Video Broadcasting over DVB-H

    Directory of Open Access Journals (Sweden)

    Jumisko-Pyykkö Satu

    2011-01-01

    Full Text Available Abstract The Open Profiling of Quality (OPQ is a mixed methods approach combining a conventional quantitative psychoperceptual evaluation and qualitative descriptive quality evaluation based on naïve participants' individual vocabulary. The method targets evaluation of heterogeneous and multimodal stimulus material. The current OPQ data collection procedure provides a rich pool of data, but full benefit of it has neither been taken in the analysis to build up completeness in understanding the phenomenon under the study nor has the procedure in the analysis been probed with alternative methods. The goal of this paper is to extend the original OPQ method with advanced research methods that have become popular in related research and the component model to be able to generalize individual attributes into a terminology of Quality of Experience. We conduct an extensive subjective quality evaluation study for 3D video on mobile device with heterogeneous stimuli. We vary factors on content, media (coding, concealments, and slice modes, and transmission levels (channel loss rate. The results showed that advanced procedures in the analysis cannot only complement each other but also draw deeper understanding on Quality of Experience.

  17. VIDEO '78: International Experience and Models.

    Science.gov (United States)

    Prix Jeunesse Foundation, Munich (Germany).

    The use of video technology as an alternative form of communications media for artists, teachers, students, and community groups in the United States, Europe, and Third World nations is described. Specific examples of video use in the various countries are outlined and individual characteristics of program organization, production, and…

  18. Video Conferencing for a Virtual Seminar Room

    DEFF Research Database (Denmark)

    Forchhammer, Søren; Fosgerau, A.; Hansen, Peter Søren K.

    2002-01-01

    A PC-based video conferencing system for a virtual seminar room is presented. The platform is enhanced with DSPs for audio and video coding and processing. A microphone array is used to facilitate audio based speaker tracking, which is used for adaptive beam-forming and automatic camera-control...

  19. Elementos diferenciales en la forma audiovisual de los videojuegos. Vinculación, presencia e inmersión. Differential elements in the audiovisual form of the video games. Bonding, presence and immersion.

    Directory of Open Access Journals (Sweden)

    María Gabino Campos

    2012-01-01

    Full Text Available In just over two decades the video games reach the top positions in the audiovisual sector. Different technical, economic and social facts make that video games are the main reference of entertainment for a growing number of millions. This phenomenon is also due to its creators develop stories with elements of interaction in order to achieve high investment of time by users. We investigate the concepts of bonding, presence and immersion for its implications in the sensory universe of video games and we show the state of the audiovisual research in this field in the first decade of the century.

  20. Rheumatoid Arthritis Educational Video Series

    Medline Plus

    Full Text Available ... Rheumatoid Arthritis Educational Video Series Rheumatoid Arthritis Educational Video Series This series of five videos was designed ... Activity Role of Body Weight in Osteoarthritis Educational Videos for Patients Rheumatoid Arthritis Educational Video Series Psoriatic ...

  1. Određivanje daljine cilja pomoću video senzora i analiza uticaja grešaka i šuma merenja / Target range evaluation using video sensor and analysis of the influence of measurement noise and errors

    Directory of Open Access Journals (Sweden)

    Dragoslav Ugarak

    2006-01-01

    Full Text Available U radu je opisan matematički model određivanja daljine cilja obradom video snimaka u toku praćenja. Analizirani su doprinosi parametara koji utiču na veličinu grešaka i određene su vrednosti standardnog odstupanja. / This paper presents mathematical model of determining target range by analyzing video frame during the tracking. The contribution of effective parameters to accuracy are analyzed and values of standard deviation are determined.

  2. Preservation of urine samples for metabolic evaluation of stone-forming patients.

    Science.gov (United States)

    Ferraz, Renato Ribeiro Nogueira; Baxmann, Alessandra Calábria; Ferreira, Larissa Gorayb; Nishiura, José Luiz; Siliano, Priscila Reina; Gomes, Samirah Abreu; Moreira, Silvia Regina Silva; Heilberg, Ita Pfeferman

    2006-10-01

    Metabolic evaluation of stone-forming (SF) patients is based on the determination of calcium, oxalate, citrate, uric acid and other parameters in 24-h urine samples under a random diet. A reliable measurement of urinary oxalate requires the collection of urine in a receptacle containing acid preservative. However, urinary uric acid cannot be determined in the same sample under this condition. Therefore, we tested the hypothesis that the addition of preservatives (acid or alkali) after urine collection would not modify the results of those lithogenic parameters. Thirty-four healthy subjects (HS) were submitted to two non-consecutive collections of 24-h urine. The first sample was collected in a receptacle containing hydrochloric acid (HCl 6 N) and the second in a dry plastic container, with HCl being added as soon as the urine sample was received at the laboratory. Additionally, 34 HS and 34 SF patients collected a spot urine sample that was divided into four aliquots, one containing HCl, another containing sodium bicarbonate (NaHCO(3 )5 g/l), and two others in which these two preservative agents were added 24 h later. Urinary oxalate, calcium, magnesium, citrate, creatinine and uric acid were determined. Urinary parameters were also evaluated in the presence of calcium oxalate or uric acid crystals. Mean values of all urinary parameters obtained from previously acidified 24-h urine samples did not differ from those where acid was added after urine collection. The same was true for spot urine samples, with the exception of urinary citrate that presented a slight albeit significant change of 5.9% between samples in HS and 3.1% in SF. Uric acid was also not different between pre- and post-alkalinized spot urine samples. The presence of crystals did not alter these results. We concluded that post-delivery acidification or alkalinization of urine samples does not modify the measured levels of urinary oxalate, calcium, magnesium, creatinine and uric acid, and that the

  3. Evaluation of Cryotechniques for Tem Observation of Sols - Application to Boehmite Sols Used in Catalysts Forming

    Directory of Open Access Journals (Sweden)

    Fauchadour D.

    1999-07-01

    Full Text Available The use of suspensions in the heterogeneous catalysis field being a big issue, it appears important to be able to control this step as much as possible. Size of the objects in the suspension, aggregation state, homogeneity or heterogeneity (all called texture or structure here are some important parameters which are sometimes difficult to evaluate with traditionalmethods such as X-ray scattering or rheology. The cryotechniques applied to transmission electron microscopy is then an interesting alternative. Three different methods of cryofixation have been tested on low solid content suspensions of boehmite commonly used during the dispersion step of alumina carrier forming. Two different cryoprotectants were tested as well. It is shown that liquid propane immersion cooling (PL and slam freezing (SF methods require the use of a cryoprotectant whereas high pressure technique (HP avoids ice crystal formation without any addition of cryoprotectant in the suspension. It is shown also that DMSO is efficient with PL and SF techniques only when added at a high concentration (50% to the suspension. Glycerol is preferred because water is vitrified since that 30% of glycerol is added. Comparisons of high pressure preparations with and without glycerol show very little differences of texture on the replica. Explanations of the origin of the small differences of density are tentatively given. More analyses are now under progress to clarify the role of glycerol. Cryomicroscopy is conclude to be a very good technique when the texture of a suspension must be studied for example in the elaboration or in the improvement of a peptisation or a colloid formation process.

  4. Performance evaluation of aprons according to lead equipment and form types

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Ki Won; Choi, Sung Hyun; Kim, Ki Yeol; Lee, Ik Pyo; Hwang, Sun Gwang [Dept. of Radiology, Kyung Hee University Hostpital at Gangdong, Seoul (Korea, Republic of); Dong, Kyung Rae [Dept. of of Radiological Technology, Gwangju Health University, Gwangju (Korea, Republic of)

    2017-02-15

    The apron is one of the essential protectors to reduce the exposure dose of radiological technologists. This study is to provide a guideline for purchasing the aprons with excellent performance and to help reducing the exposure dose by measuring the shielding ration and uniformity of aprons according to lead equivalent and form types. The shielding ratio of aprons were measured by using radiation generator and dosimeter. Exposure conditions were 81 kVp, 25 mAs, source to image receptor distance (SID) 100 cm and field of view (FOV) 17{sup ×}17{sup .} Exposure areas for front type and around type aprons were divided into 9 areas and for 2 pieces type aprons were divided into 3 areas of top and 4 areas of skirt. The uniformity of aprons were measured by using fluoroscopy and Image J. The 4 regions of interest (ROI) were set into acquired images and measured uniformity by measuring the standard deviation of pixel intensity in ROIs. In continuous shielding ration measurement of aprons according to exposure area, there was not statistical significance (P>0.05). In ANOVA test of aprons, there was statistical significance (P<0.01). In the results of shielding ratio, although the aprons had equal lead equivalent, there were difference in shielding ratio from 83.59% to 98.15%. In the results of uniformity, the front type aprons with equal lead equivalent indicated the similar uniformity. However, the around type and 2 pieces type apron with equal lead equivalent indicated the different uniformity each other, from 1.8 to 22.2. If the performance evaluation in this study were conducted regularly before and after purchase the aprons, the exposure does to patients and radiological technologists could be reduced.

  5. Video enhancement effectiveness for target detection

    Science.gov (United States)

    Simon, Michael; Fischer, Amber; Petrov, Plamen

    2011-05-01

    Unmanned aerial vehicles (UAVs) capture real-time video data of military targets while keeping the warfighter at a safe distance. This keeps soldiers out of harm's way while they perform intelligence, surveillance and reconnaissance (ISR) and close-air support troops in contact (CAS-TIC) situations. The military also wants to use UAV video to achieve force multiplication. One method of achieving effective force multiplication involves fielding numerous UAVs with cameras and having multiple videos processed simultaneously by a single operator. However, monitoring multiple video streams is difficult for operators when the videos are of low quality. To address this challenge, we researched several promising video enhancement algorithms that focus on improving video quality. In this paper, we discuss our video enhancement suite and provide examples of video enhancement capabilities, focusing on stabilization, dehazing, and denoising. We provide results that show the effects of our enhancement algorithms on target detection and tracking algorithms. These results indicate that there is potential to assist the operator in identifying and tracking relevant targets with aided target recognition even on difficult video, increasing the force multiplier effect of UAVs. This work also forms the basis for human factors research into the effects of enhancement algorithms on ISR missions.

  6. 61214++++','DOAJ-ART-EN'); return false;" href="+++++https://jual.nipissingu.ca/wp-content/uploads/sites/25/2014/06/v61214.m4v">61214++++">Jailed - Video

    Directory of Open Access Journals (Sweden)

    Cameron CULBERT

    2012-07-01

    Full Text Available As the public education system in Northern Ontario continues to take a downward spiral, a plethora of secondary school students are being placed in an alternative educational environment. Juxtaposing the two educational settings reveals very similar methods and characteristics of educating our youth as opposed to using a truly alternative approach to education. This video reviews the relationship between public education and alternative education in a remote Northern Ontario setting. It is my belief that the traditional methods of teaching are not appropriate in educating at risk students in alternative schools. Paper and pencil worksheets do not motivate these students to learn and succeed. Alternative education should emphasize experiential learning, a just in time curriculum based on every unique individual and the students true passion for everyday life. Cameron Culbert was born on February 3rd, 1977 in North Bay, Ontario. His teenage years were split between attending public school and his willed curriculum on the ski hill. Culbert spent 10 years (1996-2002 & 2006-2010 competing for Canada as an alpine ski racer. His passion for teaching and coaching began as an athlete and has now transferred into the classroom and the community. As a graduate of Nipissing University (BA, BEd, MEd. Camerons research interests are alternative education, physical education and technology in the classroom. Currently Cameron is an active educator and coach in Northern Ontario.

  7. Video Design Games

    DEFF Research Database (Denmark)

    Smith, Rachel Charlotte; Christensen, Kasper Skov; Iversen, Ole Sejer

    We introduce Video Design Games to train educators in teaching design. The Video Design Game is a workshop format consisting of three rounds in which participants observe, reflect and generalize based on video snippets from their own practice. The paper reports on a Video Design Game workshop...

  8. Characterization of social video

    Science.gov (United States)

    Ostrowski, Jeffrey R.; Sarhan, Nabil J.

    2009-01-01

    The popularity of social media has grown dramatically over the World Wide Web. In this paper, we analyze the video popularity distribution of well-known social video websites (YouTube, Google Video, and the AOL Truveo Video Search engine) and characterize their workload. We identify trends in the categories, lengths, and formats of those videos, as well as characterize the evolution of those videos over time. We further provide an extensive analysis and comparison of video content amongst the main regions of the world.

  9. EVALUATION OF THOR MINERALIZED WASTE FORMS FOR THE DOE ADVANCED REMEDIATION TECHNOLOGIES PHASE 2 PROJECT

    Energy Technology Data Exchange (ETDEWEB)

    Crawford, C.; Jantzen, C.

    2012-02-02

    , sulfates/sulfides, chlorides, fluorides, volatile radionuclides or other aqueous components. The FBSR technology can process these wastes into a crystalline ceramic (mineral) waste form. The mineral waste form that is produced by co-processing waste with kaolin clay in an FBSR process has been shown to be as durable as LAW glass. Monolithing of the granular FBSR product, which is one of the objectives of this current study, is being investigated to prevent dispersion during transport or burial/storage but is not necessary for performance. FBSR testing of a Hanford LAW simulant and a WTP-SW simulant at the pilot scale was performed by THOR Treatment Technologies, LLC at Hazen Research Inc. in April/May 2008. The Hanford LAW simulant was the Rassat 68 tank blend and the target concentrations for the LAW was increased by a factor of 10 for Sb, As, Ag, Cd, and Tl; 100 for Ba and Re (Tc surrogate); 1,000 for I; and 254,902 for Cs based on discussions with the DOE field office and the environmental regulators and an evaluation of the Hanford Tank Waste Envelopes A, B, and C. It was determined through the evaluation of the actual tank waste metals concentrations that some metal levels were not sufficient to achieve reliable detection in the off-gas sampling. Therefore, the identified metals concentrations were increased in the Rassat simulant processed by TTT at HRI to ensure detection and enable calculation of system removal efficiencies, product retention efficiencies, and mass balance closure without regard to potential results of those determinations or impacts on product durability response such as Toxicity Characteristic Leach Procedure (TCLP). A WTP-SW simulant based on melter off-gas analyses from Vitreous State Laboratory (VSL) was also tested at HRI in the 15-inch diameter Engineering Scale Test Demonstration (ESTD) dual reformer at HRI in 2008. The target concentrations for the Resource Conservation and Recovery Act (RCRA) metals were increased by 16X for Se, 29X for

  10. Annotated corpus and the empirical evaluation of probability estimates of grammatical forms

    Directory of Open Access Journals (Sweden)

    Ševa Nada

    2003-01-01

    Full Text Available The aim of the present study is to demonstrate the usage of an annotated corpus in the field of experimental psycholinguistics. Specifically, we demonstrate how the manually annotated Corpus of Serbian Language (Kostić, Đ. 2001 can be used for probability estimates of grammatical forms, which allow the control of independent variables in psycholinguistic experiments. We address the issue of processing Serbian inflected forms within two subparadigms of feminine nouns. In regression analysis, almost all processing variability of inflected forms has been accounted for by the amount of information (i.e. bits carried by the presented forms. In spite of the fact that probability distributions of inflected forms for the two paradigms differ, it was shown that the best prediction of processing variability is obtained by the probabilities derived from the predominant subparadigm which encompasses about 80% of feminine nouns. The relevance of annotated corpora in experimental psycholinguistics is discussed more in detail .

  11. Evaluating the Effectiveness of Teacher-Implemented Video Prompting on an iPod Touch to Teach Food-Preparation Skills to High School Students with Autism Spectrum Disorders

    Science.gov (United States)

    Johnson, Jesse W.; Blood, Erika; Freeman, Amy; Simmons, Karen

    2013-01-01

    A multiple-probe-across-behaviors design was used to evaluate the effectiveness of video prompts delivered on an iPod Touch to teach food-preparation skills to two high school students with autism spectrum disorders (ASD) and intellectual disability. The special education teacher implemented the procedure in the high school classroom. Student data…

  12. The Aesthetics of the Ambient Video Experience

    Directory of Open Access Journals (Sweden)

    Jim Bizzocchi

    2008-01-01

    Full Text Available Ambient Video is an emergent cultural phenomenon, with roots that go deeply into the history of experimental film and video art. Ambient Video, like Brian Eno's ambient music, is video that "must be as easy to ignore as notice" [9]. This minimalist description conceals the formidable aesthetic challenge that faces this new form. Ambient video art works will hang on the walls of our living rooms, corporate offices, and public spaces. They will play in the background of our lives, living video paintings framed by the new generation of elegant, high-resolution flat-panel display units. However, they cannot command attention like a film or television show. They will patiently play in the background of our lives, yet they must always be ready to justify our attention in any given moment. In this capacity, ambient video works need to be equally proficient at rewarding a fleeting glance, a more direct look, or a longer contemplative gaze. This paper connects a series of threads that collectively illuminate the aesthetics of this emergent form: its history as a popular culture phenomenon, its more substantive artistic roots in avant-garde cinema and video art, its relationship to new technologies, the analysis of the viewer's conditions of reception, and the work of current artists who practice within this form.

  13. Direct ophthalmoscopy on YouTube: analysis of instructional YouTube videos' content and approach to visualization.

    Science.gov (United States)

    Borgersen, Nanna Jo; Henriksen, Mikael Johannes Vuokko; Konge, Lars; Sørensen, Torben Lykke; Thomsen, Ann Sofia Skou; Subhi, Yousif

    2016-01-01

    Direct ophthalmoscopy is well-suited for video-based instruction, particularly if the videos enable the student to see what the examiner sees when performing direct ophthalmoscopy. We evaluated the pedagogical effectiveness of instructional YouTube videos on direct ophthalmoscopy by evaluating their content and approach to visualization. In order to synthesize main themes and points for direct ophthalmoscopy, we formed a broad panel consisting of a medical student, junior and senior physicians, and took into consideration book chapters targeting medical students and physicians in general. We then systematically searched YouTube. Two authors reviewed eligible videos to assess eligibility and extract data on video statistics, content, and approach to visualization. Correlations between video statistics and contents were investigated using two-tailed Spearman's correlation. We screened 7,640 videos, of which 27 were found eligible for this study. Overall, a median of 12 out of 18 points (interquartile range: 8-14 key points) were covered; no videos covered all of the 18 points assessed. We found the most difficulties in the approach to visualization of how to approach the patient and how to examine the fundus. Time spent on fundus examination correlated with the number of views per week (Spearman's ρ=0.53; P=0.029). Videos may help overcome the pedagogical issues in teaching direct ophthalmoscopy; however, the few available videos on YouTube fail to address this particular issue adequately. There is a need for high-quality videos that include relevant points, provide realistic visualization of the examiner's view, and give particular emphasis on fundus examination.

  14. Reduced attentional capture in action video game players.

    Science.gov (United States)

    Chisholm, Joseph D; Hickey, Clayton; Theeuwes, Jan; Kingstone, Alan

    2010-04-01

    Recent studies indicate that playing action video games improves performance on a number of attention-based tasks. However, it remains unclear whether action video game experience primarily affects endogenous or exogenous forms of spatial orienting. To examine this issue, action video game players and non-action video game players performed an attentional capture task. The results show that action video game players responded quicker than non-action video game players, both when a target appeared in isolation and when a salient, task-irrelevant distractor was present in the display. Action video game players additionally showed a smaller capture effect than did non-action video game players. When coupled with the findings of previous studies, the collective evidence indicates that extensive experience with action video games may enhance players' top-down attentional control, which, in turn, can modulate the negative effects of bottom-up attentional capture.

  15. Robust Shot Boundary Detection from Video Using Dynamic Texture

    Directory of Open Access Journals (Sweden)

    Peng Taile

    2014-03-01

    Full Text Available Video boundary detection belongs to a basis subject in computer vision. It is more important to video analysis and video understanding. The existing video boundary detection methods always are effective to certain types of video data. These methods have relatively low generalization ability. We present a novel shot boundary detection algorithm based on video dynamic texture. Firstly, the two adjacent frames are read from a given video. We normalize the two frames to get the same size frame. Secondly, we divide these frames into some sub-domain on the same standard. The following thing is to calculate the average gradient direction of sub-domain and form dynamic texture. Finally, the dynamic texture of adjacent frames is compared. We have done some experiments in different types of video data. These experimental results show that our method has high generalization ability. To different type of videos, our algorithm can achieve higher average precision and average recall relative to some algorithms.

  16. An Evaluation of Indian Consumers' Reporting of Suspected Adverse Drug Reactions with a Designated Reporting Form.

    Science.gov (United States)

    Rehan, Harmeet Singh; Sah, Ravinder; Gupta, Anubhuti; Nagar, Parvesh

    2017-01-01

    The Pharmacovigilance Program of India recently initiated a process for direct patient reporting of Adverse Drug Reactions (ADRs) with a designated form. A survey of 200 patients reporting ADRs filling the form. Forms were analysed for patient data, the suspected medication(s), ADRs and possible causality. 54.3% of respondents provided their contact information; the implicated medicine was mentioned in 60% and the description of ADRs in 80% although 46.2% were not interpretable. The severity of ADRs was mentioned in 73.5%. No responder filled the expiry date component of the implicated modification and a causality assessment from most forms was unclassifiable (57%) or unclassified (26%). Details of concomitant drugs were missing. Missing information was a deterrent in analysing the consumer ADR reports for signal detection. It is recommended that the following fields are highlighted in the form: consumer's initials, address, date suspected reaction started, description of event, name, dose, and the reason for the use the medication as well as its expiry date. These should be mandatory in the existing form and new fields added for weight and height, batch number for vaccines and biological products, de challenge and rechallenge results to the suspected medicine and concomitantly used medicines. To improve the quality of information in the consumer reporting form an awareness campaign is also suggested. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

  17. Video Games as Reconstructionist Sites of Learning in Art Education

    Science.gov (United States)

    Parks, Nancy S.

    2008-01-01

    Art education has been in the midst of a transformation shaped by several factors, including changes in contemporary art theories, political and economic factors, and technological developments. Film, music videos, advertisements, video games and other forms of popular culture are shaping how students learn today. Discussions about video gaming…

  18. Composing with Images: A Study of High School Video Producers.

    Science.gov (United States)

    Reilly, Brian

    At Bell High School (Los Angeles, California), students have been using video cameras, computers and editing machines to create videos in a variety of forms and on a variety of topics; in this setting, video is the textual medium of expression. A study was conducted using participant-observation and interviewing over the course of one school year…

  19. Interactive Videos Enhance Learning about Socio-Ecological Systems

    Science.gov (United States)

    Smithwick, Erica; Baxter, Emily; Kim, Kyung; Edel-Malizia, Stephanie; Rocco, Stevie; Blackstock, Dean

    2018-01-01

    Two forms of interactive video were assessed in an online course focused on conservation. The hypothesis was that interactive video enhances student perceptions about learning and improves mental models of social-ecological systems. Results showed that students reported greater learning and attitudes toward the subject following interactive video.…

  20. Reduced attentional capture in action video game players

    NARCIS (Netherlands)

    Chisholm, J; Hickey, C.; Theeuwes, J.; Kingstone, A.

    2010-01-01

    Recent studies indicate that playing action video games improves performance on a number of attention-based tasks. However, it remains unclear whether action video game experience primarily affects endogenous or exogenous forms of spatial orienting. To examine this issue, action video game players

  1. Violent video game effects on children and adolescents. A review of the literature.

    Science.gov (United States)

    Gentile, D A; Stone, W

    2005-12-01

    Studies of violent video games on children and adolescents were reviewed to: 1) determine the multiple effects; 2) to offer critical observations about common strengths and weaknesses in the literature; 3) to provide a broader perspective to understand the research on the effects of video games. The review includes general theoretical and methodological considerations of media violence, and description of the general aggression model (GAM). The literature was evaluated in relation to the GAM. Published literature, including meta-analyses, are reviewed, as well as relevant unpublished material, such as conference papers and dissertations. Overall, the evidence supports hypotheses that violent video game play is related to aggressive affect, physiological arousal, aggressive cognitions, and aggressive behaviours. The effects of video game play on school performance are also evaluated, and the review concludes with a dimensional approach to video game effects. The dimensional approach evaluates video game effects in terms of amount, content, form, and mechanics, and appears to have many advantages for understanding and predicting the multiple types of effects demonstrated in the literature.

  2. Residual stress evaluation and curvature behavior of aluminum 7050 peen forming processed; Avaliacao da tensao residual em aluminio 7050 conformado pelo processo peen forming

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Rene Ramos de

    2011-07-01

    Shot peening is a superficial cold work process used to increase the fatigue life evaluated by residual stress measurements. The peen forming process is a variant of the shot peening process, where a curvature in the plate is obtained by the compression of the grains near to the surface. In this paper, the influence of the parameters such as: pressure of shot, ball shot size and thickness of aluminum 7050 samples with respect to residual stress profile and resulting arc height was studied. The evaluation of the residual stress profile was obtained by sin{sup 2} {psi} method. The results show that the formation of the curvature arc height is proportional to the shot peening pressure, of spheres size and inversely proportional to the thickness of the sample, and that stress concentration factor is larger for samples shot peened with small balls. On final of this paper presents an additional study on micro strain and average crystallite size, which can evaluate the profile of the samples after blasting. (author)

  3. The presentation of seizures and epilepsy in YouTube videos.

    Science.gov (United States)

    Wong, Victoria S S; Stevenson, Matthew; Selwa, Linda

    2013-04-01

    We evaluated videos on the social media website, YouTube, containing references to seizures and epilepsy. Of 100 videos, 28% contained an ictal event, and 25% featured a person with epilepsy recounting his or her personal experience. Videos most commonly fell into categories of Personal Experience/Anecdotal (44%) and Informative/Educational (38%). Fifty-one percent of videos were judged as accurate, and 9% were inaccurate; accuracy was not an applicable attribute in the remainder of the videos. Eighty-five percent of videos were sympathetic towards those with seizures or epilepsy, 9% were neutral, and only 6% were derogatory. Ninety-eight percent of videos were thought to be easily understood by a layperson. The user-generated content on YouTube appears to be more sympathetic and accurate compared to other forms of mass media. We are optimistic that with a shifting ratio towards sympathetic content about epilepsy, the amount of stigma towards epilepsy and seizures will continue to lessen. Copyright © 2013 Elsevier Inc. All rights reserved.

  4. A Novel Quantum Video Steganography Protocol with Large Payload Based on MCQI Quantum Video

    Science.gov (United States)

    Qu, Zhiguo; Chen, Siyi; Ji, Sai

    2017-11-01

    As one of important multimedia forms in quantum network, quantum video attracts more and more attention of experts and scholars in the world. A secure quantum video steganography protocol with large payload based on the video strip encoding method called as MCQI (Multi-Channel Quantum Images) is proposed in this paper. The new protocol randomly embeds the secret information with the form of quantum video into quantum carrier video on the basis of unique features of video frames. It exploits to embed quantum video as secret information for covert communication. As a result, its capacity are greatly expanded compared with the previous quantum steganography achievements. Meanwhile, the new protocol also achieves good security and imperceptibility by virtue of the randomization of embedding positions and efficient use of redundant frames. Furthermore, the receiver enables to extract secret information from stego video without retaining the original carrier video, and restore the original quantum video as a follow. The simulation and experiment results prove that the algorithm not only has good imperceptibility, high security, but also has large payload.

  5. Cycle water chemistry based on film forming amines at power plants: evaluation of technical guidance documents

    Science.gov (United States)

    Dyachenko, F. V.; Petrova, T. I.

    2017-11-01

    Efficiency and reliability of the equipment in fossil power plants as well as in combined cycle power plants depend on the corrosion processes and deposit formation in steam/water circuit. In order to decrease these processes different water chemistries are used. Today the great attention is being attracted to the application of film forming amines and film forming amine products. The International Association for the Properties of Water and Steam (IAPWS) consolidated the information from all over the World, and based on the research studies and operating experience of researchers and engineers from 21 countries, developed and authorized the Technical Guidance Document: “Application of Film Forming Amines in Fossil, Combined Cycle, and Biomass Power Plants” in 2016. This article describe Russian and International technical guidance documents for the cycle water chemistries based on film forming amines at fossil and combined cycle power plants.

  6. Distributed video production, distributed musical rehearsal and distributed video editing and retrieval

    OpenAIRE

    Konstantas, Dimitri; Milanese, Ruggero; Jacot-Descombes, Alain; Pun, Thierry

    2000-01-01

    The DVP project investigated the Quality of Service (QoS) requirements of broadcasters for several forms of distributed video production and run a series of trials of distributed virtual studios (studio on demand), distributed virtual reality, distributed musical rehearsals and distributed video editing and retrieval. The CUI of the University of Geneva participated in the DVP project in the distributed musical rehearsal (DR) and distributed video editing and retrieval (DVER) applications.

  7. Video Marketing: How Important are Videos for the Hospitality Industry in Finland?

    OpenAIRE

    Hofstede, Bianca

    2017-01-01

    In the past few years, there has been many changes to the business environment of many companies. This has led to the development of new marketing forms, such as video marketing. Video marketing is increasingly popular. However, not all companies are successful in their video marketing efforts and researchers struggle to reach consensus in solving certain problems. The popularity and uncertainty of this topic has led to the decision to use it for this research. The objective of this paper is ...

  8. Towards a typology of video game trailers: Between the ludic and the cinematic

    OpenAIRE

    Jan Švelch

    2015-01-01

    This paper explores video game trailers, their various forms and the roles they play within video game industry and culture. It offers an overview of the current practice of video game trailer differentiation and proposes a new typology of video game trailers based on their relation to ludic and cinematic aspects of a video game, combining the theory of paratexts, video game performance framework, the interface effect concept, as well as the concept of transmedia storytelling. This typology r...

  9. Computed tomography guided percutaneous injection of a mixture of lipiodol and methylene blue in rabbit lungs: evaluation of localization ability for video-assisted thoracoscopic surgery.

    Science.gov (United States)

    Jin, Kwang Nam; Lee, Kyung Won; Kim, Tae Jung; Song, Yong Sub; Kim, Dong Il

    2014-01-01

    Preoperative localization is necessary prior to video assisted thoracoscopic surgery for the detection of small or deeply located lung nodules. We compared the localization ability of a mixture of lipiodol and methylene blue (MLM) (0.6 mL, 1:5) to methylene blue (0.5 mL) in rabbit lungs. CT-guided percutaneous injections were performed in 21 subjects with MLM and methylene blue. We measured the extent of staining on freshly excised lung and evaluated the subjective localization ability with 4 point scales at 6 and 24 hr after injections. For MLM, radio-opacity was evaluated on the fluoroscopy. We considered score 2 (acceptable) or 3 (excellent) as appropriate for localization. The staining extent of MLM was significantly smaller than methylene blue (0.6 vs 1.0 cm, Pmethylene blue (2.8 vs 2.2, P=0.010). Excellent staining was achieved in 17 subjects (81%) with MLM and 8 (38%) with methylene blue (P=0.011). An acceptable or excellent radio-opacity of MLM was found in 13 subjects (62%). An appropriate localization rate of MLM was 100% with the use of the directly visible ability and radio-opacity of MLM. MLM provides a superior pulmonary localization ability over methylene blue.

  10. Indexed Captioned Searchable Videos: A Learning Companion for STEM Coursework

    Science.gov (United States)

    Tuna, Tayfun; Subhlok, Jaspal; Barker, Lecia; Shah, Shishir; Johnson, Olin; Hovey, Christopher

    2017-02-01

    Videos of classroom lectures have proven to be a popular and versatile learning resource. A key shortcoming of the lecture video format is accessing the content of interest hidden in a video. This work meets this challenge with an advanced video framework featuring topical indexing, search, and captioning (ICS videos). Standard optical character recognition (OCR) technology was enhanced with image transformations for extraction of text from video frames to support indexing and search. The images and text on video frames is analyzed to divide lecture videos into topical segments. The ICS video player integrates indexing, search, and captioning in video playback providing instant access to the content of interest. This video framework has been used by more than 70 courses in a variety of STEM disciplines and assessed by more than 4000 students. Results presented from the surveys demonstrate the value of the videos as a learning resource and the role played by videos in a students learning process. Survey results also establish the value of indexing and search features in a video platform for education. This paper reports on the development and evaluation of ICS videos framework and over 5 years of usage experience in several STEM courses.

  11. Using Video Games to Understand Thermoregulation

    Science.gov (United States)

    Dibley, Jeremiah; Parish, Jamie

    2007-01-01

    Funded by the U.S. Department of Education, a research project was conducted to evaluate the effectiveness of video games as inquiry-based learning experiences for the science classroom. As a result, the video game, "Creature Control: The Quest for Homeostasis" was developed and field-tested in select middle schools in the United States.…

  12. Methods to evaluate functional nerve recovery in adult rats : walking track analysis, video analysis and the withdrawal reflex

    NARCIS (Netherlands)

    Dijkstra, [No Value; Meek, MF; Robinson, PH; Gramsbergen, A

    2000-01-01

    The aim of this study was to compare different methods for the evaluation of functional nerve recovery. Three groups of adult male Wistar rats were studied. In group A, a 12-mm gap between nerve ends was bridged by an autologous nerve graft; in rats of group B we performed a crush lesion of the

  13. Evaluation of an MMPI--a short form: implications for adaptive testing.

    Science.gov (United States)

    Archer, R P; Tirrell, C A; Elkins, D E

    2001-02-01

    Efforts to develop a viable short form of the MMPI (Hathaway & McKinley, 1943) span more than 50 years, with more recent attempts to significantly shorten the item pool focused on the use of adaptive computerized test administration. In this article, we report some psychometric properties of an MMPI-Adolescent version (MMPI-A; Butcher et al., 1992) short form based on administration of the first 150 items of this test instrument. We report results for both the MMPI-A normative sample of 1,620 adolescents and a clinical sample of 565 adolescents in a variety of treatment settings. We summarize results for the MMPI-A basic scales in terms of Pearson product-moment correlations generated between full administration and short-form administration formats and mean Tscore elevations for the basic scales generated by each approach. In this investigation, we also examined single-scale and 2-point congruences found for the MMPI-A basic clinical scales as derived from standard and short-form administrations. We present the relative strengths and weaknesses of the MMPI-A short form and discuss the findings in terms of implications for attempts to shorten the item pool through the use of computerized adaptive assessment approaches.

  14. Privacy-protecting video surveillance

    Science.gov (United States)

    Wickramasuriya, Jehan; Alhazzazi, Mohanned; Datt, Mahesh; Mehrotra, Sharad; Venkatasubramanian, Nalini

    2005-02-01

    Forms of surveillance are very quickly becoming an integral part of crime control policy, crisis management, social control theory and community consciousness. In turn, it has been used as a simple and effective solution to many of these problems. However, privacy-related concerns have been expressed over the development and deployment of this technology. Used properly, video cameras help expose wrongdoing but typically come at the cost of privacy to those not involved in any maleficent activity. This work describes the design and implementation of a real-time, privacy-protecting video surveillance infrastructure that fuses additional sensor information (e.g. Radio-frequency Identification) with video streams and an access control framework in order to make decisions about how and when to display the individuals under surveillance. This video surveillance system is a particular instance of a more general paradigm of privacy-protecting data collection. In this paper we describe in detail the video processing techniques used in order to achieve real-time tracking of users in pervasive spaces while utilizing the additional sensor data provided by various instrumented sensors. In particular, we discuss background modeling techniques, object tracking and implementation techniques that pertain to the overall development of this system.

  15. Environmental correlates of cycling: Evaluating urban form and location effects based on Danish micro-data

    DEFF Research Database (Denmark)

    Nielsen, Thomas Alexander Sick; Olafsson, Anton Stahl; Carstensen, Trine Agervig

    2013-01-01

    The paper analyses the environmental correlates of cycling based on Danish transportation and urban form micro-data. The results show that established walkability factors such as density, connectivity and diversity are related to cycling, but access to retail concentrations/centres, public...... transportation level-of-service, as well as competition between walking and cycling depending on environmental features can be added. Attractive conditions for using public transportation or walking are related to less cycling. The findings quantify the effects of urban form on the probability of cycling...

  16. Real-time video streaming in mobile cloud over heterogeneous wireless networks

    Science.gov (United States)

    Abdallah-Saleh, Saleh; Wang, Qi; Grecos, Christos

    2012-06-01

    are captured for analytical purposes on the mobile user node. Experimental results are obtained and analysed. Future work is identified towards further improvement of the current design and implementation. With this new mobile video networking concept and paradigm implemented and evaluated, results and observations obtained from this study would form the basis of a more in-depth, comprehensive understanding of various challenges and opportunities in supporting high-quality real-time video streaming in mobile cloud over heterogeneous wireless networks.

  17. Forms in Search of Substance: Quality and Evaluation in Romanian Universities

    Science.gov (United States)

    Geven, Koen; Maricut, Adina

    2015-01-01

    Romania's integration into the European Union is fraught with cultural stereotypes. One dominant narrative is that the country creates "forms without substance": meaningless institutions without adequate personnel or intellectual capital. In this paper, we investigate whether this popular stereotype adequately describes higher education…

  18. Test plan for formulation and evaluation of grouted waste forms with shine process wastes

    Energy Technology Data Exchange (ETDEWEB)

    Ebert, W. L. [Argonne National Lab. (ANL), Argonne, IL (United States); Jerden, J. L. [Argonne National Lab. (ANL), Argonne, IL (United States)

    2015-09-01

    The objective of this experimental project is to demonstrate that waste streams generated during the production of Mo99 by the SHINE Medical Technologies (SHINE) process can be immobilized in cement-based grouted waste forms having physical, chemical, and radiological stabilities that meet regulatory requirements for handling, storage, transport, and disposal.

  19. 78 FR 40760 - 60-Day Notice of Proposed Information Collection: Training Evaluation Form

    Science.gov (United States)

    2013-07-08

    ... forms or other available information. Persons with hearing or speech impairments may access this number...; telephone 202-402-4109 This is not a toll-free number. Persons with hearing or speech impairments may access... asset management in 2010 and 2011. These sessions may be held as technical assistance seminars...

  20. Student Evaluation of Teaching: A Study Exploring Student Rating Instrument Free-Form Text Comments

    Science.gov (United States)

    Stupans, Ieva; McGuren, Therese; Babey, Anna Marie

    2016-01-01

    Student rating instruments are recognised to be valid indicators of effective instruction, providing a valuable tool to improve teaching. However, free-form text comments obtained from the open-ended question component of such surveys are only infrequently analysed comprehensively. We employed an innovative, systematic approach to the analysis of…

  1. DEVELOPMENT OF MODEL FOR QUANTITATIVE EVALUATION OF DYNAMICALLY STABLE FORMS OF RIVER CHANNELS

    Directory of Open Access Journals (Sweden)

    O. V. Zenkin

    2017-01-01

    Full Text Available The article highlights the method of calculating the optimum curvature of the river channels using the kinematic model of the flow structure based on the concept of discrete nature of the channel process. It offers the analytic form of the equation of motion of river flow, which can be used simulation modeling for searching dynamically stable form of the river channel, and which can control water level in rivers. The source data for the illustrations of given in the article modeling methods have been served the images received from MODIS on the Terra satellite, for the lower reaches of the river Kur, which merges with the river Urmi, forming the Tunguska river – the left tributary of the Amur.The modified geometric method can be used to calculate obliquity of tangent to the curve and normal in those situations when observed on satellite imagery points are located on the coordinate of the network irregularly and when three points lying on the curve of the riverbed do not form isosceles triangle.The model assembles tangential and radial components of the forces acting on the water flow (centrifugal, friction and gravity. Curvature radius is explicitly expressed in the model through the parameter  – gradient angle relative to the axis X. As solution for the value of the angle  is searched, when the correlation function reaches its maximum. It is assumed that the riverbed shape “wrong” and could be modified so that the resulting curve better correlated with calculated curve. Morphometric dependences for macroforms allow creating series of morphological methods for the calculation of deformations and displacement of the shore in any section of meander scroll.The proposed technique has been tested also on satellite imagery of high resolution. The presented methods of calculation are used as the basis for hydrological projects of geoinformation systems oriented at prediction of morphodynamic processes and morphological evolution of river

  2. The evaluation of patient self-completion concordance forms used in community pharmacy : a comparison of two European countries

    NARCIS (Netherlands)

    Geurts, Marlies M E; Zuydgeest, Iris A; Walser, Sabine; Kijlstra, Nico B; Petkova, Valentina; de Gier, Johan J

    OBJECTIVES: To evaluate the use of patient self-completion concordance forms in Dutch and Bulgarian pharmacies. Second, to show any differences in pharmacy practice and patient behaviour in two European countries: the Netherlands and Bulgaria. METHODS: A random sample of 500 pharmacies were

  3. Perceptual compressive sensing scalability in mobile video

    Science.gov (United States)

    Bivolarski, Lazar

    2011-09-01

    Scalability features embedded within the video sequences allows for streaming over heterogeneous networks to a variety of end devices. Compressive sensing techniques that will allow for lowering the complexity increase the robustness of the video scalability are reviewed. Human visual system models are often used in establishing perceptual metrics that would evaluate quality of video. Combining of perceptual and compressive sensing approach outlined from recent investigations. The performance and the complexity of different scalability techniques are evaluated. Application of perceptual models to evaluation of the quality of compressive sensing scalability is considered in the near perceptually lossless case and to the appropriate coding schemes is reviewed.

  4. Use of Short Animal-Themed Videos to Enhance Veterinary Students' Mood, Attention, and Understanding of Pharmacology Lectures.

    Science.gov (United States)

    Kogan, Lori R; Hellyer, Pete; Clapp, Tod R; Suchman, Erica; McLean, Jennifer; Schoenfeld-Tacher, Regina

    2017-09-29

    Professional DVM training is inherently stressful and challenging for students. This study evaluated a simple intervention-short breaks during a veterinary pharmacology lecture course in the form of funny/cute animal videos (Mood Induction Procedures, or MIP)-to assess for potential impact on students' mood, interest in material, and perceived understanding of material. Ten YouTube video clips showing cats or dogs were selected to influence students' affective states. The videos were shown in a required pharmacology class offered during the fall semester of the second year of the DVM program at a large, land-grant institution in the Western US. The student cohort consisted of 133 students (20 males, 113 females). Twenty days of the course were randomly chosen for the study and ranged from weeks 2 to 13 of the semester. Sessions in which the videos were played were alternated with sessions in which no video was played, for a total of 10 video days and 10 control days. There were significant differences in all three post-class assessment measures between the experimental (video) days and the control days. Results suggest that showing short cute animal videos in the middle of class positively affected students' mood, interest in material, and self-reported understanding of material. While the results of this study are limited to one student cohort at one institution, the ease of implementation of the technique and relatively low stakes support incorporation of the MIP technique across a variety of basic and clinical science courses.

  5. Effects of Video Prompting Techniques on Teaching Daily Living Skills to Children with Autism Spectrum Disorders: A Review

    Science.gov (United States)

    Domire, Sarah C.; Wolfe, Pamela

    2014-01-01

    Video-based instruction is becoming a common intervention in today's classrooms. Previous research has focused primarily on video modeling techniques that required the student to watch an entire video of the task before attempting to complete the task independently. Video prompting is a form of video instruction that breaks down target skills…

  6. Single-operator cholangioscopy in patients requiring evaluation of bile duct disease or therapy of biliary stones (with videos).

    Science.gov (United States)

    Chen, Yang K; Parsi, Mansour A; Binmoeller, Kenneth F; Hawes, Robert H; Pleskow, Douglas K; Slivka, Adam; Haluszka, Oleh; Petersen, Bret T; Sherman, Stuart; Devière, Jacques; Meisner, Søren; Stevens, Peter D; Costamagna, Guido; Ponchon, Thierry; Peetermans, Joyce A; Neuhaus, Horst

    2011-10-01

    The feasibility of single-operator cholangioscopy (SOC) for biliary diagnostic and therapeutic procedures was previously reported. To confirm the utility of SOC in more widespread clinical use. Prospective clinical cohort study. Fifteen endoscopy referral centers in the United States and Europe. Two hundred ninety-seven patients requiring evaluation of bile duct disease or biliary stone therapy. SOC examination and, as indicated, SOC-directed stone therapy or forceps biopsy. Procedural success defined as ability to (1) visualize target lesions and, if indicated, collect biopsy specimens adequate for histological evaluation or (2) visualize biliary stones and initiate fragmentation and removal. The overall procedure success rate was 89% (95% CI, 84%-92%). Adequate tissue for histological examination was secured in 88% of 140 patients who underwent biopsy. Overall sensitivity in diagnosing malignancy was 78% for SOC visual impression and 49% for SOC-directed biopsy. Sensitivity was higher (84% and 66%, respectively) for intrinsic bile duct malignancies. Diagnostic SOC procedures altered clinical management in 64% of patients. Procedure success was achieved in 92% of 66 patients with stones and complete stone clearance during the study SOC session in 71%. The incidence of serious procedure-related adverse events was 7.5% for diagnostic SOC and 6.1% for SOC-directed stone therapy. The study was observational in design with no control group. Evaluation of bile duct disease and biliary stone therapy can be safely performed with a high success rate by using the SOC system. Copyright © 2011 American Society for Gastrointestinal Endoscopy. Published by Mosby, Inc. All rights reserved.

  7. Studenterproduceret video til eksamen

    Directory of Open Access Journals (Sweden)

    Kenneth Hansen

    2016-05-01

    Full Text Available Formålet med denne artikel er at vise, hvordan læringsdesign og stilladsering kan anvendes til at skabe en ramme for studenterproduceret video til eksamen på videregående uddannelser. Artiklen tager udgangspunkt i en problemstilling, hvor uddannelsesinstitutionerne skal håndtere og koordinere undervisning inden for både det faglige område og mediefagligt område og sikre en balance mellem en fagfaglighed og en mediefaglig tilgang. Ved at dele opgaven ud på flere faglige resurser, er der mere koordinering, men man kommer omkring problemet med krav til underviserne om dobbelt faglighed ved medieproduktioner. Med afsæt i Lanarca Declarationens perspektiver på læringsdesign og hovedsageligt Jerome Bruners principper for stilladsering, sammensættes en model for understøttelse af videoproduktion af studerende på videregående uddannelser. Ved at anvende denne model for undervisningssessioner og forløb får de fagfaglige og mediefaglige undervisere et redskab til at fokusere og koordinere indsatsen frem mod målet med, at de studerende producerer og anvender video til eksamen.

  8. Development and evaluation of short forms of the Pain Catastrophizing Scale and the Pain Self-efficacy Questionnaire.

    Science.gov (United States)

    McWilliams, L A; Kowal, J; Wilson, K G

    2015-10-01

    To facilitate efficient screening and reduce the length of comprehensive self-report batteries, a four-item short form of the Pain Catastrophizing Scale (PCS) and a two-item short form of the Pain Self-Efficacy Questionnaire (PSEQ) have been developed and evaluated in samples of patients with arm and upper extremity pain. The first aim of this study was to evaluate these short forms in a heterogeneous sample of patients seeking treatment for chronic musculoskeletal pain, using a priori criteria for determining adequate internal consistency, construct validity and sensitivity to change. In addition, the findings of past studies were used to identify items suitable for new and potentially stronger short forms of these measures. Data were provided by 280 patients who completed the original PCS and PSEQ as part of an interdisciplinary rehabilitation programme. The previously developed four-item PCS and the newly developed six-item short form of the PCS both met the internal consistency and construct validity criteria. They did not meet the criterion regarding sensitivity to change. However, similar to what was obtained using the original PCS, large effect sizes were found when using these short forms to examine pre-treatment to post-treatment changes in catastrophizing. For the PSEQ, the new four-item short form was clearly superior to the other alternatives and met all three criteria. The strongest short forms of the PCS and PSEQ could facilitate the assessment of pain catastrophizing and self-efficacy in situations in which the use of the longer original measures is not feasible. © 2015 European Pain Federation - EFIC®

  9. Evaluating the Psychometric Properties of the Mental Health Continuum-Short Form (MHC-SF)

    OpenAIRE

    Lamers, S.M.A.; Westerhof, Gerben Johan; Bohlmeijer, Ernst Thomas; ten Klooster, Peter M; Keyes, Cory L.M.

    2011-01-01

    There is a growing consensus that mental health is not merely the absence of mental illness, but it also includes the presence of positive feelings (emotional well-being) and positive functioning in individual life (psychological well-being) and community life (social well-being). We examined the structure, reliability, convergent validity, and discriminant validity of the Mental Health Continuum-Short Form (MHC-SF), a new self-report questionnaire for positive mental health assessment. We ex...

  10. Numerical modelling evaluation for the microclimate of an outdoor urban form in Cairo, Egypt

    Directory of Open Access Journals (Sweden)

    Mohamed H. Elnabawi

    2015-08-01

    Full Text Available In order to achieve outdoor thermal comfort it is necessary to understand the interactions between the prevailing climate, the urban form and roughness. The near surface boundary layer is directly influenced by local irradiative and convective exchange processes due to the presence of a variety of different surfaces, sheltering elements and obstacles to air flow leading to distinctive micro-scale climates. The paper presents a micro-scale numerical model for an outdoor urban form for a hot summer’s day in Al-Muizz street located at the Islamic quarter of Cairo, where a few studies have attempted to study these conditions in vernacular settings in hot arid areas where the continuously evolving urban patterns and shaded environments were perceived to produce more pedestrian friendly outdoor environments. In situ measurements are used to validate the ENVI-met results which showed an overall agreement with the observed ones, representing adequate mean radiant temperature (Tmrt which is one of the most important meteorological parameters governing human energy balance and has therefore a strong influence on thermal sensation of the pedestrians using the open public spaces and generating a micro-climatic map as an initial step in addressing the urgent need for a modelling platform accessible to urban designers, architects, and decision makers towards sustainable urban forms.

  11. US Pharmacopeial Convention safety evaluation of menaquinone-7, a form of vitamin K.

    Science.gov (United States)

    Marles, Robin J; Roe, Amy L; Oketch-Rabah, Hellen A

    2017-07-01

    Vitamin K plays important biological roles in maintaining normal blood coagulation, bone mineralization, soft tissue physiology, and neurological development. Menaquinone-7 is a form of vitamin K2 that occurs naturally in some animal-derived and fermented foods. It is also available as an ingredient of dietary supplements. Menaquinone-7 has greater bioavailability than other forms of vitamin K, which has led to increasing sales and use of menaquinone-7 supplements. This special article reviews the chemistry, nomenclature, dietary sources, intake levels, and pharmacokinetics of menaquinones, along with the nonclinical toxicity data available and the data on clinical outcomes related to safety (adverse events). In conclusion, the data reviewed indicate that menaquinone-7, when ingested as a dietary supplement, is not associated with any serious risk to health or with other public health concerns. On the basis of this conclusion, US Pharmacopeia monographs have been developed to establish quality standards for menaquinone-7 as a dietary ingredient and as a dietary supplement in various dosage forms. © The Author(s) 2017. Published by Oxford University Press on behalf of the International Life Sciences Institute. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  12. Acoustic Neuroma Educational Video

    Medline Plus

    Full Text Available ... support group for me? Find a Group Upcoming Events Video Library Photo Gallery One-on-One Support ... group for me? Find a group Back Upcoming events Video Library Photo Gallery One-on-One Support ...

  13. Video Games and Citizenship

    National Research Council Canada - National Science Library

    Bourgonjon, Jeroen; Soetaert, Ronald

    2013-01-01

    ... by exploring a particular aspect of digitization that affects young people, namely video games. They explore the new social spaces which emerge in video game culture and how these spaces relate to community building and citizenship...

  14. Videos, Podcasts and Livechats

    Medline Plus

    Full Text Available ... Doctor Find a Provider Meet the Team Blog Articles News Resources Links Videos Podcasts Webinars For the ... Doctor Find a Provider Meet the Team Blog Articles News Provider Directory Donate Resources Links Videos Podcasts ...

  15. Videos, Podcasts and Livechats

    Medline Plus

    Full Text Available ... Doctor Find a Provider Meet the Team Blog Articles & Stories News Resources Links Videos Podcasts Webinars For ... Doctor Find a Provider Meet the Team Blog Articles & Stories News Provider Directory Donate Resources Links Videos ...

  16. Digital Video in Research

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    2012-01-01

    questions of our media literacy pertaining to authoring multimodal texts (visual, verbal, audial, etc.) in research practice and the status of multimodal texts in academia. The implications of academic video extend to wider issues of how researchers harness opportunities to author different types of texts......Is video becoming “the new black” in academia, if so, what are the challenges? The integration of video in research methodology (for collection, analysis) is well-known, but the use of “academic video” for dissemination is relatively new (Eriksson and Sørensen). The focus of this paper is academic...... video, or short video essays produced for the explicit purpose of communicating research processes, topics, and research-based knowledge (see the journal of academic videos: www.audiovisualthinking.org). Video is increasingly used in popular showcases for video online, such as YouTube and Vimeo, as well...

  17. Acoustic Neuroma Educational Video

    Medline Plus

    Full Text Available ... Back Support Groups Is a support group for me? Find a Group Upcoming Events Video Library Photo ... Support Groups Back Is a support group for me? Find a group Back Upcoming events Video Library ...

  18. Acoustic Neuroma Educational Video

    Medline Plus

    Full Text Available ... group for me? Find a Group Upcoming Events Video Library Photo Gallery One-on-One Support ANetwork ... for me? Find a group Back Upcoming events Video Library Photo Gallery One-on-One Support Back ...

  19. Videos, Podcasts and Livechats

    Medline Plus

    Full Text Available ... the Team Blog Articles & Stories News Resources Links Videos Podcasts Webinars For the Media For Clinicians For ... Family Caregivers Glossary Menu In this section Links Videos Podcasts Webinars For the Media For Clinicians For ...

  20. Videos, Podcasts and Livechats

    Science.gov (United States)

    ... the Team Blog Articles & Stories News Resources Links Videos Podcasts Webinars For the Media For Clinicians For ... Family Caregivers Glossary Menu In this section Links Videos Podcasts Webinars For the Media For Clinicians For ...

  1. Videos, Podcasts and Livechats

    Medline Plus

    Full Text Available ... a Provider Meet the Team Blog Articles & Stories News Resources Links Videos Podcasts Webinars For the Media ... a Provider Meet the Team Blog Articles & Stories News Provider Directory Donate Resources Links Videos Podcasts Webinars ...

  2. Acoustic Neuroma Educational Video

    Medline Plus

    Full Text Available ... for me? Find a Group Upcoming Events Video Library Photo Gallery One-on-One Support ANetwork Peer ... me? Find a group Back Upcoming events Video Library Photo Gallery One-on-One Support Back ANetwork ...

  3. Video Screen Capture Basics

    Science.gov (United States)

    Dunbar, Laura

    2014-01-01

    This article is an introduction to video screen capture. Basic information of two software programs, QuickTime for Mac and BlueBerry Flashback Express for PC, are also discussed. Practical applications for video screen capture are given.

  4. Videos, Podcasts and Livechats

    Medline Plus

    Full Text Available ... News Resources Links Videos Podcasts Webinars For the Media For Clinicians For Policymakers For Family Caregivers Glossary ... this section Links Videos Podcasts Webinars For the Media For Clinicians For Policymakers For Family Caregivers Glossary ...

  5. Towards a typology of video game trailers: Between the ludic and the cinematic

    Directory of Open Access Journals (Sweden)

    Jan Švelch

    2015-09-01

    Full Text Available This paper explores video game trailers, their various forms and the roles they play within video game industry and culture. It offers an overview of the current practice of video game trailer differentiation and proposes a new typology of video game trailers based on their relation to ludic and cinematic aspects of a video game, combining the theory of paratexts, video game performance framework, the interface effect concept, as well as the concept of transmedia storytelling. This typology reflects the historical evolution of a video game trailer and also takes into account current trends in the audiovisual paratexts of video games.

  6. Instructional video for teaching venepuncture.

    Science.gov (United States)

    Pan, Michael; Harcharik, Sara; Moskalenko, Marina; Luber, Adam; Bernardo, Sebastian; Levitt, Jacob

    2014-10-01

    Safe venepuncture technique is a critical skill for health care professionals, to avoid accidental occupational injury. This study investigates whether watching an instructional video improves medical students' ability to perform venepuncture safely. This was a randomised, controlled, assessor-blinded trial that evaluated the utility of an instructional video, with the primary outcome of the ability to perform venepuncture safely. Forty-two second-year medical students were recruited and randomised to receive either video instruction (group A, n = 20) or no intervention (group B, n = 22). Prior to the study, all students attended an instructor-led workshop on venepuncture. During the study, students were paired and instructed to perform venepuncture on a partner. Performance was assessed using a points-based checklist. Pre- and post-study surveys were conducted to assess confidence with technique. The mean total checklist score was higher in group A than in group B, with values of 14.15 and 9.18, respectively (p video performed venepuncture more effectively and reported greater confidence with the technique. Medical students can benefit from having access to an instructional video on venepuncture as an adjunct to the standard curriculum. Safe venepuncture technique is a critical skill for health care professionals. © 2014 John Wiley & Sons Ltd.

  7. Evaluation of the ability of Acinetobacter baumannii to form biofilms on six different biomedical relevant surfaces.

    Science.gov (United States)

    Greene, C; Wu, J; Rickard, A H; Xi, C

    2016-10-01

    The human opportunistic pathogen, Acinetobacter baumannii, has the propensity to form biofilms and frequently cause medical device-related infections in hospitals. However, the physio-chemical properties of medical surfaces, in addition to bacterial surface properties, will affect colonization and biofilm development. The objective of this study was to compare the ability of A. baumannii to form biofilms on six different materials common to the hospital environment: glass, porcelain, stainless steel, rubber, polycarbonate plastic and polypropylene plastic. Biofilms were developed on material coupons in a CDC biofilm reactor. Biofilms were visualized and quantified using fluorescent staining and imaged using confocal laser scanning microscopy (CLSM) and by direct viable cell counts. Image analysis of CLSM stacks indicated that the mean biomass values for biofilms grown on glass, rubber, porcelain, polypropylene, stainless steel and polycarbonate were 0·04, 0·26, 0·62, 1·00, 2·08 and 2·70 μm(3) /μm(2) respectively. Polycarbonate developed statistically more biofilm mass than glass, rubber, porcelain and polypropylene. Viable cell counts data were in agreement with the CLSM-derived data. In conclusion, polycarbonate was the most accommodating surface for A. baumannii ATCC 17978 to form biofilms while glass was least favourable. Alternatives to polycarbonate for use in medical and dental devices may need to be considered. In the hospital environment, Acinetobacter baumannii is one of the most persistent and difficult to control opportunistic pathogens. The persistence of A. baumannii is due, in part, to its ability to colonize surfaces and form biofilms. This study demonstrates that A. baumannii can form biofilms on a variety of different surfaces and develops substantial biofilms on polycarbonate - a thermoplastic material that is often used in the construction of medical devices. The findings highlight the need to further study the in

  8. Determining the brand awareness of product placement in video games

    OpenAIRE

    Král, Marek

    2015-01-01

    This bachelor thesis focusses on the determination of the brand awareness of product placement in video games. The theoretical part includes information about marketing, product placement and video games. The practical part consists of evaluation of the market research about product placements in video games. Conclusion suggests the most important factors influencing the level brand awareness.

  9. Creating a streaming video collection for your library

    CERN Document Server

    Duncan, Cheryl J

    2014-01-01

    Creating a Streaming Video Collection for Your Library covers the main processes associated with streaming video, from licensing to access and evaluation, and will serve as a key reference and source of best practices for libraries adding streaming video titles to their collections.

  10. Teacher Self-Captured Video: Learning to See

    Science.gov (United States)

    Sherin, Miriam Gamoran; Dyer, Elizabeth B.

    2017-01-01

    Videos are often used for demonstration and evaluation, but a more productive approach would be using video to support teachers' ability to notice and interpret classroom interactions. That requires thinking carefully about the physical aspects of shooting video--where the camera is placed and how easily student interactions can be heard--as well…

  11. Transmission of compressed video

    Science.gov (United States)

    Pasch, H. L.

    1990-09-01

    An overview of video coding is presented. The aim is not to give a technical summary of possible coding techniques, but to address subjects related to video compression in general and to the transmission of compressed video in more detail. Bit rate reduction is in general possible by removing redundant information; removing information the eye does not use anyway; and reducing the quality of the video. The codecs which are used for reducing the bit rate, can be divided into two groups: Constant Bit rate Codecs (CBC's), which keep the bit rate constant, but vary the video quality; and Variable Bit rate Codecs (VBC's), which keep the video quality constant by varying the bit rate. VBC's can be in general reach a higher video quality than CBC's using less bandwidth, but need a transmission system that allows the bandwidth of a connection to fluctuate in time. The current and the next generation of the PSTN does not allow this; ATM might. There are several factors which influence the quality of video: the bit error rate of the transmission channel, slip rate, packet loss rate/packet insertion rate, end-to-end delay, phase shift between voice and video, and bit rate. Based on the bit rate of the coded video, the following classification of coded video can be made: High Definition Television (HDTV); Broadcast Quality Television (BQTV); video conferencing; and video telephony. The properties of these classes are given. The video conferencing and video telephony equipment available now and in the next few years can be divided into three categories: conforming to 1984 CCITT standard for video conferencing; conforming to 1988 CCITT standard; and conforming to no standard.

  12. Making good physics videos

    Science.gov (United States)

    Lincoln, James

    2017-05-01

    Online videos are an increasingly important way technology is contributing to the improvement of physics teaching. Students and teachers have begun to rely on online videos to provide them with content knowledge and instructional strategies. Online audiences are expecting greater production value, and departments are sometimes requesting educators to post video pre-labs or to flip our classrooms. In this article, I share my advice on creating engaging physics videos.

  13. Desktop video conferencing

    OpenAIRE

    Potter, Ray; Roberts, Deborah

    2007-01-01

    This guide aims to provide an introduction to Desktop Video Conferencing. You may be familiar with video conferencing, where participants typically book a designated conference room and communicate with another group in a similar room on another site via a large screen display. Desktop video conferencing (DVC), as the name suggests, allows users to video conference from the comfort of their own office, workplace or home via a desktop/laptop Personal Computer. DVC provides live audio and visua...

  14. A Method of Sharing Tacit Knowledge by a Bulletin Board Link to Video Scene and an Evaluation in the Field of Nursing Skill

    Science.gov (United States)

    Shimada, Satoshi; Azuma, Shouzou; Teranaka, Sayaka; Kojima, Akira; Majima, Yukie; Maekawa, Yasuko

    We developed the system that knowledge could be discovered and shared cooperatively in the organization based on the SECI model of knowledge management. This system realized three processes by the following method. (1)A video that expressed skill is segmented into a number of scenes according to its contents. Tacit knowledge is shared in each scene. (2)Tacit knowledge is extracted by bulletin board linked to each scene. (3)Knowledge is acquired by repeatedly viewing the video scene with the comment that shows the technical content to be practiced. We conducted experiments that the system was used by nurses working for general hospitals. Experimental results show that the nursing practical knack is able to be collected by utilizing bulletin board linked to video scene. Results of this study confirmed the possibility of expressing the tacit knowledge of nurses' empirical nursing skills sensitively with a clue of video images.

  15. 47 CFR 79.3 - Video description of video programming.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Video description of video programming. 79.3... CLOSED CAPTIONING AND VIDEO DESCRIPTION OF VIDEO PROGRAMMING § 79.3 Video description of video programming. (a) Definitions. For purposes of this section the following definitions shall apply: (1...

  16. [Methodology and evaluation of exposure to fumes formed during welding of chromium-nickel steel].

    Science.gov (United States)

    Matczak, W; Chmielnicka, J

    1988-01-01

    Using various methods for determination of welding fumes components and taking into account a simultaneous determination of soluble compounds of chromium III and IV, hygienic evaluation in two working places employing different systems of MMA/SS welding, TIG/SS welding and padding was carried out. As it is indicated by the results, proper hygienic evaluation of working conditions is possible owing to the measurements of individual exposure of workers in the breathing zone, allowing for determination of chromium manganese, nickel, and, while applying low-hydrogen electrodes, also fluorides, in every test.

  17. COMPARATIVE STUDY OF COMPRESSION TECHNIQUES FOR SYNTHETIC VIDEOS

    OpenAIRE

    Ayman Abdalla; Ahmad Mazhar; Mosa Salah

    2014-01-01

    We evaluate the performance of three state of the art video codecs on synthetic videos. The evaluation is based on both subjective and objective quality metrics. The subjective quality of the compressed video sequences is evaluated using the Double Stimulus Impairment Scale (DSIS) assessment metric while the Peak Signal-to-Noise Ratio (PSNR) is used for the objective evaluation. An extensive number of experiments are conducted to study the effect of frame rate and resolution o...

  18. Hop.Skip.Jump.Games. The design, development, deployment and evaluation of video games to support locomotor acquisition in a classroom setting

    OpenAIRE

    MC GANN, JAMIE

    2017-01-01

    APPROVED Sedentary video gameplay is typically described as a contributing factor to poor locomotor skills (hop, skip and jump etc.) observed in the modern day child. Further, poor locomotor skills are a significant predictor of problems elsewhere including health, speech and language, behaviour and reading fluency. Conversely, with the emergence of 3D sensor interfaces (e.g. Kinect), video games now support full body, gross motor simulated interactivity. This offers an intriguing opportun...

  19. Video Self-Modeling

    Science.gov (United States)

    Buggey, Tom; Ogle, Lindsey

    2012-01-01

    Video self-modeling (VSM) first appeared on the psychology and education stage in the early 1970s. The practical applications of VSM were limited by lack of access to tools for editing video, which is necessary for almost all self-modeling videos. Thus, VSM remained in the research domain until the advent of camcorders and VCR/DVD players and,…

  20. Tracing Sequential Video Production

    DEFF Research Database (Denmark)

    Otrel-Cass, Kathrin; Khalid, Md. Saifuddin

    2015-01-01

    With an interest in learning that is set in collaborative situations, the data session presents excerpts from video data produced by two of fifteen students from a class of 5th semester techno-anthropology course. Students used video cameras to capture the time they spent working with a scientist...... video, nature of the interactional space, and material and spatial semiotics....

  1. Developing a Promotional Video

    Science.gov (United States)

    Epley, Hannah K.

    2014-01-01

    There is a need for Extension professionals to show clientele the benefits of their program. This article shares how promotional videos are one way of reaching audiences online. An example is given on how a promotional video has been used and developed using iMovie software. Tips are offered for how professionals can create a promotional video and…

  2. Test-Retest Reliability of a Tutor Evaluation Form Used in a Problem-Based Curriculum.

    Science.gov (United States)

    Hay, John A.

    1997-01-01

    A study examined the test-retest reliability of 30 student evaluations of tutors in a problem-based learning curriculum at McMaster University in Hamilton, Ontario. Results were used for the improvement of reliability of the instrument. (JOW)

  3. Rheology as a tool for evaluation of melt processability of innovative dosage forms

    DEFF Research Database (Denmark)

    Aho, Johanna Maaria; Boetker, Johan P; Baldursdottir, Stefania

    2015-01-01

    for the process simulations which are also becoming increasingly important. The authors aim to give an overview to the basics of rheology and summarize examples of the studies where rheology has been utilized in setting up or evaluating extrusion processes. Furthermore, examples of different experimental set...

  4. Electrochemical Evaluation of Corrosion Inhibiting Layers Formed in a Defect from Lithium-Leaching Organic Coatings

    NARCIS (Netherlands)

    Visser, P.; Meeusen, M.; Gonzalez Garcia, Y.; Terryn, H.A.; Mol, J.M.C.

    2017-01-01

    This work presents the electrochemical evaluation of protective layers generated in a coating defect from lithium-leaching organic coatings on AA2024-T3 aluminum alloys as a function of neutral salt spray exposure time. Electrochemical impedance spectroscopy was used to study the electrochemical

  5. Evaluation of the effect of various nitrogen forms on the Lupinus albus seed protein composition

    Directory of Open Access Journals (Sweden)

    Krzysztof Gulewicz

    2011-01-01

    Full Text Available The influence of different nitrogen forms: (N2, [N2+(NH4++NO3-], (NH4+, (NO3-, (NH4++NO3- and (-NH2 on changes of albumin, globulin, prolamin-glutelin, non-fractioned nitrogen and non-protein nitrogen fractions of the protein seed of alkaloid-low content Lupinus albus L. cv. Butan has been studied. The experiments were performed in a greenhouse on perlite using in all cases the constant P, K, Mg and micronutrients (B, Zn, Mn, Cu, Mo, Fe fertilization. The control was the treatment without any nitrogen support (Nd. It was clearly shown that nitrogen form has significant effect not only on the seed yield and seed protein content, but also on the composition of protein fractions and on the biological value of lupin protein. The main protein fraction of the seeds from all treatments were albumins (16.73-26.10 mgN/g. Among all the treatments, the highest level of globulin was observed for the seeds of plant growing with the symbiotic nitrogen form (15.26 mgN/g, while the lowest one for the control (Nd (6.86 mgN/g. Symbiotic nitrogen (N2 treatment clearly increased the glutelin-prolamin fraction while the addition of mineral nitrogen (NH4++NO3- decreased this fraction from 8.40 to 4.48 mgN/g. The lowest level of the glutelin-prolamin fraction was in the absence of any nitrogen (Nd. Non-protein fraction (Nnp was highest in the case of plants treated with (-NH2 (9.92 mgN/g, and the lowest in the absence of nitrogen (Nd (4.90 mgN/g. The level of non-fractioned nitrogen (Nr, with exception of [N2+(NH4++NO3-] and -NH2 treatments, was closest to the start material. The protein fractions (albumins, globulins and glutelins and prolamins were also electrophoretically characterized. These analysis confirmed the changes in protein composition of particular fractions under the effect of various nitrogen forms used as a fertilizer.

  6. Assessment of test methods evaluating mucoadhesive polymers and dosage forms: an overview.

    Science.gov (United States)

    Woertz, Christina; Preis, Maren; Breitkreutz, Jörg; Kleinebudde, Peter

    2013-11-01

    Oral mucoadhesive preparations have gained increasing importance in the last decades, by reason of numerous advantages like easy application, discrete handling and no swallowing of the drug product. Pharmacopoeial methods to study mucoadhesion are not available so far, despite the new monograph for oromucosal preparations is valid since the European Pharmacopoeia 7.4 (2012) including a chapter on mucoadhesive preparations. Several mucoadhesion test methods are reviewed concerning the applicability for various polymers, different drug dosage forms and comparability of experimental set-ups. Different test methods and experimental set-ups lead to huge differences regarding the results. Copyright © 2013 Elsevier B.V. All rights reserved.

  7. Closed-form evaluation of two-dimensional static lattice sums

    Science.gov (United States)

    Yakubovich, S.; Drygas, P.

    2016-01-01

    Closed-form formulae for the conditionally convergent two-dimensional (2D) static lattice sums S2 (for conductivity) and T2 (for elasticity) are deduced in terms of the complete elliptic integrals of the first and second kind. The obtained formulae yield asymptotic analytical formulae for the effective tensors of 2D composites with circular inclusions up to the third order in concentration. Exact relations between S2 and T2 for different lattices are established. In particular, the value S2=π for the square and hexagonal arrays is discussed and T2=π/2 for the hexagonal is deduced. PMID:27956878

  8. Postpartum Women’s Perspectives of Engaging with a Dietitian and Exercise Physiologist via Video Consultations for Weight Management: A Qualitative Evaluation

    Directory of Open Access Journals (Sweden)

    Lisa Vincze

    2018-01-01

    Full Text Available Optimising weight status after childbirth is important. Video consultations are an unexplored opportunity to deliver real-time support to postpartum women to improve lifestyle behaviours. This study aims to provide insight into postpartum women’s perspectives of engaging with a dietitian and exercise physiologist through video consultations for tailored nutrition and exercise care. A qualitative study using individual telephone interviews (13–36 min was undertaken. 21 women (body mass index (BMI: 28.1 ± 3.8 kg/m2; age: 32.3 ± 3.0 years; parity: 1.6 ± 0.9 children who had completed the 8 week “Video-coaching to assist lifestyle (VITAL change for mums” intervention participation included up to five video consultations with a dietitian and exercise physiologist. The interviews were audiorecorded and transcribed. Thematic data analysis was conducted by an independent researcher using NVIVO11. Themes relating to the video consultation experience included feeling that they did not differ from other consultations, they were convenient, and the length of time and flexible options were appropriate; however there was a desire for increased contact frequency. The dietitian and exercise physiologist were perceived to increase the participants’ knowledge and confidence to improve health behaviours. The approach to setting realistic and tailored goals was well received. Tailored advice from a dietitian and exercise physiologist received via video consultations is acceptable for postpartum women and offers a viable alternative to in-person care.

  9. Evaluation of Binocular Vision Therapy Efficacy by 3D Video-Oculography Measurement of Binocular Alignment and Motility.

    Science.gov (United States)

    Laria, Carlos; Pinero, David P

    2013-01-01

    To evaluate two cases of intermittent exotropia treated by vision therapy the efficacy of the treatment by complementing the clinical examination with a 3D videooculography to register and to evidence the potential applicability of this technology for such purpose. We report the binocular alignment changes occurring after vision therapy in a woman of 36 years with an intermittent exotropia of 25 prism diopters at far and 18 PD at near and a child of 10 years with 8 PD of intermittent exotropia in primary position associated to 6 PD of left eye hypotropia. Both patients presented good visual acuity with correction in both eyes. Instability of ocular deviation was evident by VOG analysis, revealing also the presence of vertical and torsional components. Binocular vision therapy was prescribed and performed including different types of vergence, accommodation, and consciousness of diplopia training. After therapy, excellent ranges of fusional vergence and a to-the-nose near point of convergence were obtained.The 3D VOG examination confirmed the compensation of the deviation with a high level of stability of binocular alignment. Significant improvement could be observed after therapy in the vertical and torsional components that were found to become more stable. Patients were very satisfied with the outcome obtained by vision therapy. 3D-VOG is a useful technique for providing an objective register of the compensation of the ocular deviation and the stability of the binocular alignment achieved after vision therapy in cases of intermittent exotropia, providing a detailed analysis of vertical and torsional improvements.

  10. Chagas' heart disease: evolutive evaluation of electrocardiographic and echocardiographic parameters in patients with the indeterminate form

    Directory of Open Access Journals (Sweden)

    Ianni Barbara Maria

    2001-01-01

    Full Text Available OBJECTIVE: To identify and associate potential electrocardiographic and echocardiographic changes in patients with the indeterminate form of Chagas' disease during long-term follow-up. METHODS: One hundred sixty patients underwent standard electrocardiography and two-dimensional guided M-mode echocardiography for left ventricular ejection fraction determination. Patients were followed up for 98.6±30.4 months, undergoing repeat electrocardiographic studies at 6-month intervals and echocardiographic studies at 12-month intervals. RESULTS: Based on the electrocardiographic findings, the patients were divided into group I, 125 patients (78.6% with normal electrocardiograms throughout follow-up, and group II, 34 patients (21.3% who developed electrocardiographic changes. Group II was further divided into group IIA (9 patients, 5.6% with permanent electrocardiographic changes, group IIB (14 patients, 8.8% with transitory electrocardiographic changes, and group IIC (11 patients, 6.9% with changes appearing only on the final electrocardiogram. Left ventricular ejection fractions remained normal in the entire population studied and did not differ among groups. CONCLUSION: The indeterminate form of Chagas' disease clearly represents a benign condition with a favorable long-term prognosis. Although some patients develop electrocardiographic changes, left ventricular systolic function is well preserved.

  11. Generation of hydrate forms of paroxetine HCl from the amorphous state: an evaluation of thermodynamic and experimental predictive approaches.

    Science.gov (United States)

    Pina, M Fátima; Pinto, João F; Sousa, João J; Craig, Duncan Q M; Zhao, Min

    2015-03-15

    In this study, we evaluate the use of theoretical thermodynamic analysis of amorphous paroxetine hydrochloride (HCl) as well as experimental assessment in order to identify the most promising approach to stability and dissolution behaviour prediction, particularly in relation to stoichiometric and nonstoichiometric hydrate formation. Differential scanning calorimetry, thermogravimetric analysis, Fourier transform infrared and X-ray diffraction techniques were used. Parameters including heat capacity, configurational thermodynamic quantities, fragility and relaxation time classified amorphous paroxetine HCl as a moderate fragile glass with a considerable degree of molecular mobility. Solubility studies indicated little advantage of the amorphous form over the crystalline due to conversion to the hydrate Form I during equilibration, while the dissolution rate was higher for the amorphous form under sink conditions. A marked difference in the physical stability of amorphous paroxetine HCl was observed between dry and low humidity storage, with the system recrystallizing to the hydrate form. We conclude that, in this particular case (amorphous conversion to the hydrate), water may be playing a dual role in both plasticizing the amorphous form and driving the equilibrium towards the hydrate form, hence prediction of recrystallization behaviour from amorphous characteristics may be confounded by the additional process of hydrate generation. Copyright © 2015 Elsevier B.V. All rights reserved.

  12. Assessing Army Values in New Soldiers: Development of a Behaviorally Anchored Peer Evaluation Form

    Science.gov (United States)

    2015-02-03

    evaluation has long been a valuable tool in school and workplace performance assessment, and has sparked military interest as a tool for leader...Values. Adhering to these values can affect Awards, promotions, selection to attend military schools , leadership positions, and desirable assignments (AR...training. Drags feet during details. Late for formation. Loses gear; leaves canteen , headgear behind. Sometimes needs a push to get started. May

  13. Evaluation of sanitizers efficiency over spore forming bacteria isolated from whole UHT milk

    Directory of Open Access Journals (Sweden)

    Edite Andrade Costa

    2017-03-01

    Full Text Available It is known that sporulated bacteria produce proteolytic and lipolytic thermoresistant enzymes associated with technological problems such as off-flavors, age gelation and bitter taste in milk and dairy products. Preventive measures to avoid contamination of milk must be taken in consideration, e.g., the employment of a certain type of sanitizing agent, its conditions of use, concentration, contact time and temperature. The aim of this work was to evaluate the sanitation efficiency of workers of the dairy industry in relation to sporulated bacteria isolated from UHT milk. The suspension test was used to evaluate the efficiency of solutions of sodium hypocholite, biguanide, peracetic acid and hydrogen peroxide against 18 strains of Bacillus sp. isolated from whole UHT milk. Although the biguanide resulted in significant decimal reduction, none of the sanitizing agents studied was effective under the evaluated conditions. The average decimal reduction values obtained were below 5 log cycles (99.999%. The effectiveness of the sanitizing agent is a primary factor in order to control the contaminations within the dairy industry. Thus, it is essential to define the ideal conditions of use of these agents.

  14. Forms and Levels of Integration: Evaluation of an Interdisciplinary Team-Building Project

    Directory of Open Access Journals (Sweden)

    Andrea Armstrong

    2013-01-01

    Full Text Available Team science models are frequently promoted as the best way to study complex societal and environmental problems. Despite increasing popularity, there is relatively little research on the processes and mechanisms that facilitate the emergence of integration of interdisciplinary teams. This article evaluates a suite of recent team-building and grant-writing activities designed to address water management in the Western U.S. We use qualitative methods to document the emergence of integrative capacity at the individual, group, and institutional levels, with particular attention to the role of graduate students and non-academic practitioners in a team science planning project. Our findings highlight the importance of social integration as a basis for conceptual integration and an ability to relate these concepts to real-world problems. The findings also demonstrate the value of qualitative evaluation measures of team readiness, capacity, and intellectual outputs to complement conventional evaluation indicators that rely on quantitative scientific outputs, particularly for team science projects still in the planning stages.

  15. Color spaces in digital video

    Energy Technology Data Exchange (ETDEWEB)

    Gaunt, R.

    1997-05-01

    Whether it`s photography, computer graphics, publishing, or video; each medium has a defined color space, or gamut, which defines the extent that a given set of RGB colors can be mixed. When converting from one medium to another, an image must go through some form of conversion which maps colors into the destination color space. The conversion process isn`t always straight forward, easy, or reversible. In video, two common analog composite color spaces are Y`tjv (used in PAL) and Y`IQ (used in NTSC). These two color spaces have been around since the beginning of color television, and are primarily used in video transmission. Another analog scheme used in broadcast studios is Y`, R`-Y`, B`-Y` (used in Betacam and Mll) which is a component format. Y`, R`-Y`,B`-Y` maintains the color information of RGB but in less space. From this, the digital component video specification, ITU-Rec. 601-4 (formerly CCIR Rec. 601) was based. The color space for Rec. 601 is symbolized as Y`CbCr. Digital video formats such as DV, Dl, Digital-S, etc., use Rec. 601 to define their color gamut. Digital composite video (for D2 tape) is digitized analog Y`UV and is seeing decreased use. Because so much information is contained in video, segments of any significant length usually require some form of data compression. All of the above mentioned analog video formats are a means of reducing the bandwidth of RGB video. Video bulk storage devices, such as digital disk recorders, usually store frames in Y`CbCr format, even if no other compression method is used. Computer graphics and computer animations originate in RGB format because RGB must be used to calculate lighting and shadows. But storage of long animations in RGB format is usually cost prohibitive and a 30 frame-per-second data rate of uncompressed RGB is beyond most computers. By taking advantage of certain aspects of the human visual system, true color 24-bit RGB video images can be compressed with minimal loss of visual information

  16. Evaluating urban form and location effects on cycling based on Danish micro-data

    DEFF Research Database (Denmark)

    Nielsen, Thomas Alexander Sick; Olafsson, Anton Stahl; Carstensen, Trine Agervig

    Extended abstract The paper analyses the environmental correlates of cycling based on Danish transportation and urban form micro-data. Established walkability factors such as density, connectivity and diversity are related to cycling, but access to retail concentrations/centers, public...... transportation level-of-service, as well a competition between walking and cycling depending on environmental features can be added Attractive conditions for using public transportation or walking relate to less cycling. Highly relevant in the context of cycling promotion the results points to some opposite...... can be seen as a potential means to reduce congestion and increase the sustainability of transportation, but also as a means to increase physical activity and public health. Consequently the factors conditioning cycling have received increasing attention in public policy as well as in research...

  17. Advanced video coding systems

    CERN Document Server

    Gao, Wen

    2015-01-01

    This comprehensive and accessible text/reference presents an overview of the state of the art in video coding technology. Specifically, the book introduces the tools of the AVS2 standard, describing how AVS2 can help to achieve a significant improvement in coding efficiency for future video networks and applications by incorporating smarter coding tools such as scene video coding. Topics and features: introduces the basic concepts in video coding, and presents a short history of video coding technology and standards; reviews the coding framework, main coding tools, and syntax structure of AV

  18. Intelligent video surveillance systems

    CERN Document Server

    Dufour, Jean-Yves

    2012-01-01

    Belonging to the wider academic field of computer vision, video analytics has aroused a phenomenal surge of interest since the current millennium. Video analytics is intended to solve the problem of the incapability of exploiting video streams in real time for the purpose of detection or anticipation. It involves analyzing the videos using algorithms that detect and track objects of interest over time and that indicate the presence of events or suspect behavior involving these objects.The aims of this book are to highlight the operational attempts of video analytics, to identify possi

  19. Development and psychometric evaluation of a 10-item short form inventory of gambling situations.

    Science.gov (United States)

    Smith, Caitlin; Stewart, Sherry H; O'Connor, Roisin M; Collins, Pamela; Katz, Joel

    2011-03-01

    The Inventory of Gambling Situations (IGS-63; Turner and Littman-Sharp, Inventory of gambling situations users guide, 2006) is a 63-item measure of high-risk gambling situations. It assesses gambling across 10 situational subscales that load onto two higher-order factors: negative and positive situations (Stewart et al. Psychology of Addictive Behaviors, 22:257-268, 2008). While the IGS-63 has excellent psychometric properties (Littman-Sharp et al., The Inventory of Gambling Situations: Reliability, factor structure, and validity (IGS Technical Manual), in press) its length may preclude its use in time-limited contexts. The purpose of this study was to develop and validate a 10-item short-form of the IGS (IGS-10). Each IGS-10 item reflects one of the ten subscale categories from the IGS-63, with two items from the original subscales included as examples for each IGS-10 item. The IGS-10 was administered to 180 undergraduate gamblers along with the IGS-63 and the Problem Gambling Severity Index (PGSI; Ferris and Wynne, Canadian Problem Gambling Index: Final report, 2001). IGS-10 items showed convergent validity with the corresponding IGS-63 subscales (r's = .60-.73). Principal components analysis of the IGS-10 revealed two factors: negative (α = .84) and positive (α = .85). PGSI scores correlated significantly with all IGS-10 items (r's = .33-.58) and with both IGS-10 higher-order subscales (r's = .66 [negative] and .49 [positive]), supporting the criterion validity of the IGS-10. Since minimal information is lost when using the IGS-10, the short form may prove particularly useful when respondent burden prevents using the full IGS-63.

  20. Preliminary evaluation of alternative waste form solidification processes. Volume I. Identification of the processes.

    Energy Technology Data Exchange (ETDEWEB)

    Treat, R.L.; Nesbitt, J.F.; Blair, H.T.; Carter, J.G.; Gorton, P.S.; Partain, W.L.; Timmerman, C.L.

    1980-04-01

    This document contains preconceptual design data on 11 processes for the solidification and isolation of nuclear high-level liquid wastes (HLLW). The processes are: in-can glass melting (ICGM) process, joule-heated glass melting (JHGM) process, glass-ceramic (GC) process, marbles-in-lead (MIL) matrix process, supercalcine pellets-in-metal (SCPIM) matrix process, pyrolytic-carbon coated pellets-in-metal (PCCPIM) matrix process, supercalcine hot-isostatic-pressing (SCHIP) process, SYNROC hot-isostatic-pressing (SYNROC HIP) process, titanate process, concrete process, and cermet process. For the purposes of this study, it was assumed that each of the solidification processes is capable of handling similar amounts of HLLW generated in a production-sized fuel reprocessing plant. It was also assumed that each of the processes would be enclosed in a shielded canyon or cells within a waste facility located at the fuel reprocessing plant. Finally, it was assumed that all of the processes would be subject to the same set of regulations, codes and standards. Each of the solidification processes converts waste into forms that may be acceptable for geological disposal. Each process begins with the receipt of HLLW from the fuel reprocessing plant. In this study, it was assumed that the original composition of the HLLW would be the same for each process. The process ends when the different waste forms are enclosed in canisters or containers that are acceptable for interim storage. Overviews of each of the 11 processes and the bases used for their identification are presented in the first part of this report. Each process, including its equipment and its requirements, is covered in more detail in Appendices A through K. Pertinent information on the current state of the art and the research and development required for the implementation of each process are also noted in the appendices.

  1. Development and evaluation of form three mathematics i-Think module (Mi-T3) on algebraic formulae topic

    Science.gov (United States)

    Sam, Sazilah; Abdullah, Mohd Faizal Nizam Lee

    2017-05-01

    This article introduces the Form Three Mathematics i-Think Module (Mi-T3). The main objective of this Mi-T3 is to assist form three students develop their higher order thinking skills (HOTS). The Sidek Module Development Model (SMDM) and eight innovative thinking maps (i-Think) were applied as a guideline in developing Mi-T3. A validation stage was carried out by eight experts, and content validation achievement more than 90% obtained. A group of form three students and teachers was piloted to check the module's reliability through one to one and small group evaluation and Cronbach Alpha more than 0.90 was obtained. Implications of the study are discussed in this article.

  2. Enhancement of hand hygiene compliance among health care workers from a hemodialysis unit using video-monitoring feedback.

    Science.gov (United States)

    Sánchez-Carrillo, Laura Arelí; Rodríguez-López, Juan Manuel; Galarza-Delgado, Dionisio Ángel; Baena-Trejo, Laura; Padilla-Orozco, Magaly; Mendoza-Flores, Lidia; Camacho-Ortiz, Adrián

    2016-08-01

    The importance of hand hygiene in the prevention of health care-associated infection is well known. Experience with hand hygiene compliance (HHC) evaluation in hemodialysis units is scarce. This study was a 3-phase, prospective longitudinal intervention study during a 5-month period in a 13-bed hemodialysis unit at a university hospital in Northern Mexico. The unit performs an average of 1,150 hemodialysis procedures per month. Compliance was evaluated by a direct observer and a video assisted observer. Feedback was given to health care workers in the form of educational sessions and confidential reports and video analysis of compliance and noncompliance. A total of 5,402 hand hygiene opportunities were registered; 5,201 during 7,820 minutes of video footage and 201 by direct observation during 1,180 minutes. Lower compliance during the baseline evaluation was observed by video monitoring compared with direct observation (P hand hygiene compliance. Video-assisted monitoring of hand hygiene is an excellent method for the evaluation of HHC in a hemodialysis unit; enhanced HHC can be achieved through a feedback program to the hemodialysis staff that includes video examples and confidential reports. Copyright © 2016 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.

  3. Flip Video for Dummies

    CERN Document Server

    Hutsko, Joe

    2010-01-01

    The full-color guide to shooting great video with the Flip Video camera. The inexpensive Flip Video camera is currently one of the hottest must-have gadgets. It's portable and connects easily to any computer to transfer video you shoot onto your PC or Mac. Although the Flip Video camera comes with a quick-start guide, it lacks a how-to manual, and this full-color book fills that void! Packed with full-color screen shots throughout, Flip Video For Dummies shows you how to shoot the best possible footage in a variety of situations. You'll learn how to transfer video to your computer and then edi

  4. Evaluation of gum mastic (Pistacia lentiscus) as a microencapsulating and matrix forming material for sustained drug release

    OpenAIRE

    Dinesh M. Morkhade

    2017-01-01

    In this study, a natural gum mastic was evaluated as a microencapsulating and matrix-forming material for sustained drug release. Mastic was characterized for its physicochemical properties. Microparticles were prepared by oil-in-oil solvent evaporation method. Matrix tablets were prepared by wet and melt granulation techniques. Diclofenac sodium (DFS) and diltiazem hydrochloride (DLTZ) were used as model drugs. Mastic produced discrete and spherical microspheres with DLTZ and microcapsules w...

  5. Formulation and evaluation of a gastroretentive dosage form of labetalol hydrochloride.

    Science.gov (United States)

    Garse, Harshal; Vij, Mohit; Yamgar, Manohar; Kadam, Vilasrao; Hirlekar, Rajashree

    2010-03-01

    Labetalol hydrochloride (LBT), 2-hydroxy-5-[1-hydroxy-2-[(1-methyl-3-phenylpropyl) amino] ethyl]-benzamide, a non-selective alpha, beta-adrenoceptor antagonist is used in the treatment of hypertension. It shows variable bioavailability ranging from 10-80% which may be attributed to its minimum solubility in pH range 6 to 10, the pH conditions prevailing at the major site of absorption i.e. small intestine. Also due to its half life of 3 to 6 hrs it is administered twice daily. In the present work non-effervescent sustained release gastroretentive floating tablets of labetalol hydrochloride have been developed using various grades of HPMC and Poloxamer M127 as wetting agent. The tablets were evaluated for in vitro drug release, floating time, floating lag time, swelling studies etc. The tablets formulated with HPMC K4M CR and HPMC K15M CR along with Poloxamer showed negligible floating lag time with a total floating time over 12 hrs with complete release. Formulation was optimized using Stat-Ease Design Expert 7.1 software. Optimized batch was evaluated for the effect of change of osmolarity and pH on drug release, floating and swelling behaviour.

  6. SEM evaluation of resin-carious dentin interfaces formed by two dentin adhesive systems.

    Science.gov (United States)

    Hsu, Kuang-Wei; Marshall, Sally J; Pinzon, Lilliam M; Watanabe, Larry; Saiz, Eduardo; Marshall, Grayson W

    2008-07-01

    We investigated the influence of dentin tubule direction and identifiable zone of carious dentin on the microstructure and the thickness of the hybrid-like layer (HL) formed by self-etch and etch-rinse adhesive systems. An etch-rinse and a self-etching adhesive were bonded to dentin carious zones divided into groups with parallel or perpendicular orientation relative to the dentin tubules at the resin-carious dentin interface (N=5/variable). Bonds were prepared to each of the four zones of carious dentin apparent after staining with Caries Detector: pink, light pink, transparent and apparently normal; six non-carious third molars were controls. The microstructure and thickness of the HL were determined by SEM and compared using three-way ANOVA and Tukey's multiple comparisons (pbonded with the etch-rinse system. For both adhesives, HL thickness in the pink zone was significantly greater than in light pink for the perpendicular group, but no significant differences were found among other variables. HL microstructure was more granular and rougher for the etch-rinse than for the self-etching system. Pores and cracks were obvious in the more demineralized zones. Resin tags were shorter and irregular in the transparent zone and often were completely absent in the outer demineralized zones (pink, light pink). Microstructure of bonded interfaces varies markedly depending on adhesive system, tubule orientation and carious zone.

  7. An evaluation of the adhesion of solid oral dosage form coatings to the oesophagus.

    Science.gov (United States)

    Smart, John D; Dunkley, Sian; Tsibouklis, John; Young, Simon

    2015-12-30

    There is a requirement for the development of oral dosage forms that are adhesive and allow extended oesophageal residence time for localised therapies, or are non-adhesive for ease of swallowing. This study provides an initial assessment of the in vitro oesophageal retention characteristics of several widely utilised pharmaceutical coating materials. To this end, a previously described apparatus has been used to measure the force required to pull a coated disc-shaped model tablet across a section of excised oesophageal tissue. Of the materials tested, the well-studied mucoadhesive polymer sodium alginate was found to be associated with significant oesophageal adhesion properties that was capable of 'self-repairing'. Hydroxypropylmethylcellulose exhibited less pronounced bioadhesive behaviour and blending this with plasticiser or with low molecular weight polymers and surfactants did not significantly affect this. Low molecular weight water soluble polymers, were found to behave similarly to the uncoated glass control disc. Polysorbates exhibited bioadhesion behaviour that was majorly influenced by the nature of the surfactant. The insoluble polymer ethylcellulose, and the relatively lipophilic surfactant sorbitan monooleate were seen to move more readily than the uncoated disc, suggesting that these may have a role as 'easy-to-swallow' coatings. Copyright © 2015 Elsevier B.V. All rights reserved.

  8. Evaluating the psychometric properties of the Mental Health Continuum-Short Form (MHC-SF).

    Science.gov (United States)

    Lamers, Sanne M A; Westerhof, Gerben J; Bohlmeijer, Ernst T; ten Klooster, Peter M; Keyes, Corey L M

    2011-01-01

    There is a growing consensus that mental health is not merely the absence of mental illness, but it also includes the presence of positive feelings (emotional well-being) and positive functioning in individual life (psychological well-being) and community life (social well-being). We examined the structure, reliability, convergent validity, and discriminant validity of the Mental Health Continuum-Short Form (MHC-SF), a new self-report questionnaire for positive mental health assessment. We expected that the MHC-SF is reliable and valid, and that mental health and mental illness are 2 related but distinct continua. This article draws on data of the LISS panel of CentERdata, a representative panel for Longitudinal Internet Studies for the Social Sciences (N = 1,662). Results revealed high internal and moderate test-retest reliability. Confirmatory factor analysis (CFA) confirmed the 3-factor structure in emotional, psychological, and social well-being. These subscales correlated well with corresponding aspects of well-being and functioning, showing convergent validity. CFA supported the hypothesis of 2 separate yet related factors for mental health and mental illness, showing discriminant validity. Although related to mental illness, positive mental health is a distinct indicator of mental well-being that is reliably assessed with the MHC-SF. © 2010 Wiley Periodicals, Inc.

  9. A generalized form of the Bernoulli Trial collision scheme in DSMC: Derivation and evaluation

    Science.gov (United States)

    Roohi, Ehsan; Stefanov, Stefan; Shoja-Sani, Ahmad; Ejraei, Hossein

    2018-02-01

    The impetus of this research is to present a generalized Bernoulli Trial collision scheme in the context of the direct simulation Monte Carlo (DSMC) method. Previously, a subsequent of several collision schemes have been put forward, which were mathematically based on the Kac stochastic model. These include Bernoulli Trial (BT), Ballot Box (BB), Simplified Bernoulli Trial (SBT) and Intelligent Simplified Bernoulli Trial (ISBT) schemes. The number of considered pairs for a possible collision in the above-mentioned schemes varies between N (l) (N (l) - 1) / 2 in BT, 1 in BB, and (N (l) - 1) in SBT or ISBT, where N (l) is the instantaneous number of particles in the lth cell. Here, we derive a generalized form of the Bernoulli Trial collision scheme (GBT) where the number of selected pairs is any desired value smaller than (N (l) - 1), i.e., Nsel computational efficiency of the BT-based collision models compared to the standard no time counter (NTC) and nearest neighbor (NN) collision models.

  10. Patterns in Nature Forming Patterns in Minds: An Evaluation of an Introductory Physics Unit

    Science.gov (United States)

    Sheaffer, Christopher Ryan

    Educators are increasingly focused on the process over the content. In science especially, teachers want students to understand the nature of science and investigation. The emergence of scientific inquiry and engineering design teaching methods have led to the development of new teaching and evaluation methods that concentrate on steps in a process rather than facts in a topic. Research supports the notion that an explicit focus on the scientific process can lead to student science knowledge gains. In response to new research and standards many teachers have been developing teaching methods that seem to work well in their classrooms, but lack the time and resources to test them in other classroom environments. A high school Physics teacher (Bradford Hill) has developed a unit called Patterns in Nature (PIN) with objectives relating mathematical modeling to the scientific process. Designed for use in his large public school classroom, the unit was taken and used in a charter school with small classes. This study looks at specifically whether or not the PIN unit effectively teaches students how to graph the data they gather and fit an appropriate mathematical pattern, using that model to predict future measurements. Additionally, the study looks at the students' knowledge and views about the nature of science and the process of scientific investigation as it is affected by the PIN unit. Findings show that students are able to identify and apply patterns to data, but have difficulties explaining the meaning of the math. Students' show increases in their knowledge of the process of science, and the majority develop positive views about science in general. A major goal of this study is to place this unit in the cyclical process of Design-Based Research and allow for Pattern in Nature's continuous improvement, development and evaluation. Design-Based Research (DBR) is an approach that can be applied to the implementation and evaluation of classroom materials. This method

  11. Experiments for possible hydroacoustic discrimination of free-swimming juvenile gadoid fish by analysis of broadband pulse spectra as well as 3D fish position form video images and split beam acoustics

    DEFF Research Database (Denmark)

    Lundgren, Bo; Nielsen, J. Rasmus

    2002-01-01

    Measurements were made of the broad-bandwidth (80–220 kHz) acoustic backscattering from free-swimming juvenile gadoids at various orientations and positions in an acoustic beam, under controlled conditions. The experimental apparatus consisted of a stereo-video camera system, a broad-bandwidth ec......Measurements were made of the broad-bandwidth (80–220 kHz) acoustic backscattering from free-swimming juvenile gadoids at various orientations and positions in an acoustic beam, under controlled conditions. The experimental apparatus consisted of a stereo-video camera system, a broad......, alignment of acoustic and optical-reference frames, and automatic position-fitting of fish models to manually marked fix-points on fish images. The software also performs Fourier spectrum analysis and pulse-shape analysis of broad-bandwidth echoes. Therefore, several measurement series on free...

  12. Evaluation of a virtual pet visit system with live video streaming of patient images over the Internet in a companion animal intensive care unit in the Netherlands.

    Science.gov (United States)

    Robben, Joris H; Melsen, Diede N; Almalik, Osama; Roomer, Wendy; Endenburg, Nienke

    2016-05-01

    To evaluate the impact of a virtual pet visit system ("TelePet" System, TPS) on owners and staff of a companion animal ICU. Longitudinal interventional study (2010-2013). Companion animal ICU at a university veterinary medical teaching hospital. Pet owners, ICU technicians. The introduction of the TPS, with live video streaming of patient images over the Internet, in a companion animal ICU. Pet owners experienced TPS as a valuable extra service. Most TPS users (72.4%) experienced less anxiety and felt less need (40.4% of TPS users) to visit their hospitalized pet in person. Most users (83.5%) shared TPS access with their family. The introduction of the TPS did not improve overall owner satisfaction, except for the score on "quality of medical treatment." Seven of 26 indicators of owner satisfaction were awarded higher scores by TPS users than by TPS nonusers in the survey after the introduction of the system. However, the lack of randomization of owners might have influenced findings. The enthusiasm of the ICU technicians for the system was tempered by the negative feedback from a small number of owners. Nevertheless they recognized the value of the system for owners. The system was user friendly and ICU staff and TPS users experienced few technical problems. As veterinary healthcare is moving toward a more client-centered approach, a virtual pet visit system, such as TPS, is a relatively simple application that may improve the well-being of most owners during the hospitalization of their pet. © Veterinary Emergency and Critical Care Society 2016.

  13. Video Inpainting of Occluding and Occluded Objects

    Science.gov (United States)

    2005-01-01

    VIDEO INPAINTING OF OCCLUDING AND OCCLUDED OBJECTS By Kedar A. Patwardhan Guillermo Sapiro and Marcelo Bertalmio IMA Preprint Series # 2016 ( January... Inpainting of Occluding and Occluded Objects 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK...PAGE unclassified Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18 VIDEO INPAINTING OF OCCLUDING AND OCCLUDED OBJECTS Kedar A

  14. Evaluation of a modified version of the Posttraumatic Growth Inventory-Short Form

    Directory of Open Access Journals (Sweden)

    Navjot Kaur

    2017-04-01

    Full Text Available Abstract Background Posttraumatic growth is the positive change resulting from traumatic experiences and is typically assessed with retrospective measures like the Posttraumatic Growth Inventory (PTGI. The PTGI was designed to include reference to a specific traumatic event, making it difficult to implement, without change, in prospective survey studies. Thus, a modified Posttraumatic Growth Inventory–Short Form (PTGI-SF was included in a large prospective study of current and former U.S. military personnel. The current study provides preliminary psychometric data for this modified measure and its ability to assess psychological well-being at a single time point. Methods The study population (N = 135,843 was randomly and equally split into exploratory and confirmatory samples that were proportionately balanced on trauma criterion. Exploratory factor analysis and confirmatory factor analysis (CFA were performed to assess the psychometric validity of the modified measure. The final model was also assessed in a subset of the confirmatory sample with a history of trauma using CFA. Results Results supported a single-factor model with two additional correlations between items assessing spirituality and items assessing compassion/appreciation for others. This model also fits among the subset with a history of trauma. The resulting measure was strongly associated with social support and personal mastery. Conclusions The modified PTGI-SF in this study captures psychological well-being in cross-sectional assessments, in addition to being able to measure posttraumatic growth with multiple assessments. Results indicate that the modified measure is represented by a single factor, but that items assessing spirituality and compassion/appreciation for others may be used alone to better capture these constructs.

  15. Evaluation of cyclosporine A eye penetration after administration of liposomal or conventional forms in animal model

    Directory of Open Access Journals (Sweden)

    Sara Nikoofal-Sahlabadi

    2013-01-01

    Full Text Available Abstract A lot of researches have investigated the effects of topical cyclosporine A on the eye surface layers’ diseases. By now the main limitation in cyclosporine application is the low permeation of the drug into the posterior segments of the eye. The aim of present study was to formulate high permeable dosage form can be beneficial in the topical treatment of the uveitis. To reach higher corneal drug absorption and drug concentration in the posterior segments of the eye, 3 nanoliposomal formulations containing 0.5 mg/ml cyclosporine A were prepared. Liposomal formulations and the commercial product (Restasis® were instilled in the right and left eyes of the rabbits, respectively. The rabbits were killed in the 3, 7, 14 and 28 days of study and the aqueous humor and vitreous were extracted. Mean size of liposomal formulation number 1, number 2 and number 3 were 107.2 ± 0.7, 129.3±0.9 and 144.8±1.8 nm and their zeta potential were -5.0±1.7, -5.5±2.3 and 44.6±6.2 mV, respectively. Results of ocular analysis showed that the liposomal formulations could increase the concentration of the drug in the aqueous and vitreous like Restasis®. But, in contrast with what has been expected the findings of this study implicate nanoliposomal formulations prepared could not make a significant difference in concentration of the drug in aqueous and vitreous humor compared to Restasis® (anionic microemulsion. In conclusion, we can state that liposomes with the same composition as our formulations are not more efficient than microemulsion for cyclosporine as ophthalmic drug delivery.

  16. Psychometric Evaluation of the Mental Health Continuum–Short Form in French Canadian Young Adults

    Science.gov (United States)

    O’Loughlin, Jennifer L.; Sabiston, Catherine M.; Fournier, Louise

    2016-01-01

    Objective: To examine the factor structure, internal consistency, reliability, sex invariance, and discriminant validity of the French Canadian version of the Mental Health Continuum–Short Form (MHC-SF). Method: A total of 1485 French-speaking postsecondary students in Quebec, Canada (58% female; mean age = 18.4, SD = 2.4), completed the MHC-SF. Confirmatory factor analysis (CFA) was used to assess the factorial structure of the MHC-SF. Internal consistency was assessed with Cronbach’s alpha, and reliability was assessed with the rho reliability coefficient. Invariance testing across sex was conducted using multigroup CFA comparing 4 increasingly restrictive models, and discriminant validity was examined against the Hospital Anxiety and Depression Scale (HADS) using Pearson correlation coefficients and CFA. Results: CFA supported the correlated 3-factor structure of the MHC-SF, with emotional, social, and psychological well-being subscales. The scale and each subscale items had internal consistency coefficients (Cronbach’s alphas) above .70 and reliability coefficients (Jöreskog’s rho) ranging from .79 to .90. Based on the multigroup CFA, configural, metric, scalar, and error variance invariance of the MHC-SF was observed across sex. Finally, the 2-continua model, suggesting that mental health and mental illness are distinct but related dimensions, was supported by both moderate inverse correlations between MHC-SF and HADS subscale scores and the 2-factor structure in CFA. Conclusions: These data support the multidimensional structure of the MHC-SF and provide evidence of internal consistency, reliability, and invariance across sex. The MHC-SF is a valid and reliable measure of mental health that is distinct from mental illness among French Canadian young adults. PMID:28363262

  17. Evaluation of Video Teleconference Systems.

    Science.gov (United States)

    1981-02-01

    OF 4 S LIRtill0 t A LEV’tA. 4 N C- [W SMALL 3 OF CONIROL. L.(l I.(1 FRINC] I l1 OF 2 .W] i CHING /] 01-11i HAF-I SWITL I.IINc, 1 0l1 4 FRIHMARY MON]IOP...TWELVE 3 OF 4 SURROGATE LEVEL 4 NO -W SMALL 3 OF T CONTROL LOCU.S FRINCIFAL 1 OF 2 S’WI I CHING / INF’UT HARD SW]1CHI N(, i OF 4 FRIMARY MONITOR li W

  18. Formulation and in vitro/in vivo evaluation of chitosan-based film forming gel containing ketoprofen.

    Science.gov (United States)

    Oh, Dong-Won; Kang, Ji-Hyun; Lee, Hyo-Jung; Han, Sang-Duk; Kang, Min-Hyung; Kwon, Yie-Hyuk; Jun, Joon-Ho; Kim, Dong-Wook; Rhee, Yun-Seok; Kim, Ju-Young; Park, Eun-Seok; Park, Chung-Woong

    2017-11-01

    The film forming gel, adhered to skin surfaces upon application and formed a film, has an advantage onto skin to provide protection and continuous drug release to the application site. This study aimed to prepare a chitosan-based film forming gel containing ketoprofen (CbFG) and to evaluate the CbFG and film from CbFG (CbFG-film). CbFG were prepared with chitosan, lactic acid and various skin permeation enhancers. The physicochemical characteristics were evaluated by texture analysis, viscometry, SEM, DSC, XRD and FT-IR. To identify the mechanism of skin permeation, in vitro skin permeation study was conducted with a Franz diffusion cell and excised SD-rat and hairless mouse dorsal skin. In vivo efficacy assessment in mono-iodoacetate (MIA)-induced rheumatoid arthritis animal model was also conducted. CbFG was successfully prepared and, after applying CbFG to the excised rat dorsal skin, the CbFG-film was also formed well. The physicochemical characteristics of CbFG and CbFG-film could be explained by the grafting of oleic acid onto chitosan in the absence of catalysts. In addition, CbFG containing oleic acid had a higher skin permeation rate in comparison with any other candidate enhancers. The in vivo efficacy study also confirmed significant anti-inflammatory and analgesic effects. Consequently, we report the successful preparation of chitosan-based film forming gel containing ketoprofen with excellent mechanical properties, skin permeation and anti-inflammatory and analgesic effects.

  19. Evaluation and identification of histamine-forming bacteria on fish products of middle Adriatic Sea

    Directory of Open Access Journals (Sweden)

    Rocco Mancusi

    2013-04-01

    evaluate specific performance objectives, define useful parameters to qualify suppliers, and guarantee microbiological criteria fixed by Regulation EU 2073/2005.

  20. Validity and reliability of a Turkish Brief Pain Inventory Short Form when used to evaluate musculoskeletal pain.

    Science.gov (United States)

    Celik, Evrim Coskun; Yalcinkaya, Ebru Yilmaz; Atamaz, Funda; Karatas, Metin; Ones, Kadriye; Sezer, Tezgul; Eren, Imran; Paker, Nurdan; Gning, Ibrahima; Mendoza, Tito; Cleeland, Charles S

    2017-01-01

    The Brief Pain Inventory (BPI) is both a questionnaire and an outcome measure that is used widely in clinical trials to assess pain associated with many conditions. The BPI Short Form has been extensively translated into foreign languages. The aim of this study was to assess the validity and reliability of a Turkish Brief Pain Inventory Short Form (BPI-TR) to evaluate musculoskeletal pain. In total, 297 patients with musculoskeletal pain participated in the study. Demographic characteristics and brief medical histories were recorded. Pain intensity was assessed using a visual analogue scale (VAS) and quality-of-life was assessed using the Short Form 36 (SF-36). Pain was evaluated using the BPI-TR in all patients. Internal consistency and test-retest analysis were used to assess reliability. The internal consistency of the scale items was assessed by calculating Cronbach's α value, which was expected to be > 0.7. The criterion validity of the BPI-TR was assessed by correlation with VAS scores. Pain intensity, pain interference, and other components of the Turkish version were consistent with validity thereof. Cronbach's α was 0.84 for pain intensity and 0.89 for pain interference. The extent of BPI-TR and VAS correlation was statistically significant. The BPI-TR may be used for assessment of musculoskeletal pain.

  1. Lightweight Object Tracking in Compressed Video Streams Demonstrated in Region-of-Interest Coding

    Directory of Open Access Journals (Sweden)

    Rik Van de Walle

    2007-01-01

    Full Text Available Video scalability is a recent video coding technology that allows content providers to offer multiple quality versions from a single encoded video file in order to target different kinds of end-user devices and networks. One form of scalability utilizes the region-of-interest concept, that is, the possibility to mark objects or zones within the video as more important than the surrounding area. The scalable video coder ensures that these regions-of-interest are received by an end-user device before the surrounding area and preferably in higher quality. In this paper, novel algorithms are presented making it possible to automatically track the marked objects in the regions of interest. Our methods detect the overall motion of a designated object by retrieving the motion vectors calculated during the motion estimation step of the video encoder. Using this knowledge, the region-of-interest is translated, thus following the objects within. Furthermore, the proposed algorithms allow adequate resizing of the region-of-interest. By using the available information from the video encoder, object tracking can be done in the compressed domain and is suitable for real-time and streaming applications. A time-complexity analysis is given for the algorithms proving the low complexity thereof and the usability for real-time applications. The proposed object tracking methods are generic and can be applied to any codec that calculates the motion vector field. In this paper, the algorithms are implemented within MPEG-4 fine-granularity scalability codec. Different tests on different video sequences are performed to evaluate the accuracy of the methods. Our novel algorithms achieve a precision up to 96.4%.

  2. Lightweight Object Tracking in Compressed Video Streams Demonstrated in Region-of-Interest Coding

    Directory of Open Access Journals (Sweden)

    Lerouge Sam

    2007-01-01

    Full Text Available Video scalability is a recent video coding technology that allows content providers to offer multiple quality versions from a single encoded video file in order to target different kinds of end-user devices and networks. One form of scalability utilizes the region-of-interest concept, that is, the possibility to mark objects or zones within the video as more important than the surrounding area. The scalable video coder ensures that these regions-of-interest are received by an end-user device before the surrounding area and preferably in higher quality. In this paper, novel algorithms are presented making it possible to automatically track the marked objects in the regions of interest. Our methods detect the overall motion of a designated object by retrieving the motion vectors calculated during the motion estimation step of the video encoder. Using this knowledge, the region-of-interest is translated, thus following the objects within. Furthermore, the proposed algorithms allow adequate resizing of the region-of-interest. By using the available information from the video encoder, object tracking can be done in the compressed domain and is suitable for real-time and streaming applications. A time-complexity analysis is given for the algorithms proving the low complexity thereof and the usability for real-time applications. The proposed object tracking methods are generic and can be applied to any codec that calculates the motion vector field. In this paper, the algorithms are implemented within MPEG-4 fine-granularity scalability codec. Different tests on different video sequences are performed to evaluate the accuracy of the methods. Our novel algorithms achieve a precision up to 96.4 .

  3. Development of methodology to evaluate microbially influenced degradation of cement-solidified low-level radioactive waste forms

    Energy Technology Data Exchange (ETDEWEB)

    Rogers, R.D.; Hamilton, M.A.; Veeh, R.H.; McConnell, J.W. [Idaho National Engineering Lab., Idaho Falls, ID (United States)

    1994-12-31

    Because of its apparent structural integrity, cement has been widely used in the United States as a binder to solidify Class B and C low-level radioactive waste (LLW). However, the resulting cement preparations are susceptible to failure due to the actions of stress and environment. An environmentally mediated process that could affect cement stability is the action of naturally occurring microorganisms. The US Nuclear Regulatory Commission (NRC), recognizing this eventuality, stated that the effects of microbial action on waste form integrity must be addressed. This paper provides present results from an ongoing program that addresses the effects of microbially influenced degradation (MID) on cement-solidified LLW. Data are provided on the development of an evaluation method using acid-producing bacteria. Results are from work with one type of these bacteria, the sulfur-oxidizing Thiobacillus. This work involved the use of a system in which laboratory- and vendor-manufactured, simulated waste forms were exposed on an intermittent basis to media containing thiobacilli. Testing demonstrated that MID has the potential to severely compromise the structural integrity of ion-exchange resin and evaporator-bottoms waste that is solidified with cement. In addition, it was found that a significant percentage of calcium and other elements were leached from the treated waste forms. Also, the surface pH of the treated specimens decreased to below 2. These conditions apparently contributed to the physical deterioration of simulated waste forms after 60 days of exposure to the thiobacilli.

  4. Evaluation of a System for High-Accuracy 3D Image-Based Registration of Endoscopic Video to C-Arm Cone-Beam CT for Image-Guided Skull Base Surgery

    Science.gov (United States)

    Mirota, Daniel J.; Uneri, Ali; Schafer, Sebastian; Nithiananthan, Sajendra; Reh, Douglas D.; Ishii, Masaru; Gallia, Gary L.; Taylor, Russell H.; Hager, Gregory D.; Siewerdsen, Jeffrey H.

    2014-01-01

    The safety of endoscopic skull base surgery can be enhanced by accurate navigation in preoperative computed tomography (CT) or, more recently, intraoperative cone-beam CT (CBCT). The ability to register real-time endoscopic video with CBCT offers an additional advantage by rendering information directly within the visual scene to account for intraoperative anatomical change. However, tracker localization error (~ 1–2 mm) limits the accuracy with which video and tomographic images can be registered. This paper reports the first implementation of image-based video-CBCT registration, conducts a detailed quantitation of the dependence of registration accuracy on system parameters, and demonstrates improvement in registration accuracy achieved by the image-based approach. Performance was evaluated as a function of parameters intrinsic to the image-based approach, including system geometry, CBCT image quality, and computational runtime. Overall system performance was evaluated in a cadaver study simulating transsphenoidal skull base tumor excision. Results demonstrated significant improvement (p < 0.001)in registration accuracy with a mean reprojection distance error of 1.28 mm for the image-based approach versus 1.82 mm for the conventional tracker-based method. Image-based registration was highly robust against CBCT image quality factors of noise and resolution, permitting integration with low-dose intraoperative CBCT. PMID:23372078

  5. Understanding Video Games

    DEFF Research Database (Denmark)

    Heide Smith, Jonas; Tosca, Susana Pajares; Egenfeldt-Nielsen, Simon

    From Pong to PlayStation 3 and beyond, Understanding Video Games is the first general introduction to the exciting new field of video game studies. This textbook traces the history of video games, introduces the major theories used to analyze games such as ludology and narratology, reviews...... the economics of the game industry, examines the aesthetics of game design, surveys the broad range of game genres, explores player culture, and addresses the major debates surrounding the medium, from educational benefits to the effects of violence. Throughout the book, the authors ask readers to consider...... larger questions about the medium: * What defines a video game? * Who plays games? * Why do we play games? * How do games affect the player? Extensively illustrated, Understanding Video Games is an indispensable and comprehensive resource for those interested in the ways video games are reshaping...

  6. Reflections on academic video

    Directory of Open Access Journals (Sweden)

    Thommy Eriksson

    2012-11-01

    Full Text Available As academics we study, research and teach audiovisual media, yet rarely disseminate and mediate through it. Today, developments in production technologies have enabled academic researchers to create videos and mediate audiovisually. In academia it is taken for granted that everyone can write a text. Is it now time to assume that everyone can make a video essay? Using the online journal of academic videos Audiovisual Thinking and the videos published in it as a case study, this article seeks to reflect on the emergence and legacy of academic audiovisual dissemination. Anchoring academic video and audiovisual dissemination of knowledge in two critical traditions, documentary theory and semiotics, we will argue that academic video is in fact already present in a variety of academic disciplines, and that academic audiovisual essays are bringing trends and developments that have long been part of academic discourse to their logical conclusion.

  7. Intelligent Analysis for Georeferenced Video Using Context-Based Random Graphs

    OpenAIRE

    Jiangfan Feng; Hu Song

    2013-01-01

    Video sensor networks are formed by the joining of heterogeneous sensor nodes, which is frequently reported as video of communication functionally bound to geographical locations. Decomposition of georeferenced video stream presents the expression of video from spatial feature set. Although it has been studied extensively, spatial relations underlying the scenario are not well understood, which are important to understand the semantics of georeferenced video and behavior of elements. Here we ...

  8. TNO at TRECVID 2008, Combining Audio and Video Fingerprinting for Robust Copy Detection

    NARCIS (Netherlands)

    Doets, P.J.; Eendebak, P.T.; Ranguelova, E.; Kraaij, W.

    2009-01-01

    TNO has evaluated a baseline audio and a video fingerprinting system based on robust hashing for the TRECVID 2008 copy detection task. We participated in the audio, the video and the combined audio-video copy detection task. The audio fingerprinting implementation clearly outperformed the video

  9. [Serious video games in pediatrics].

    Science.gov (United States)

    Drummond, D; Tesnière, A; Hadchouel, A

    2018-01-01

    Playing video games has been associated with several negative effects in children. However, serious games, which are video games designed for a primary purpose other than pure entertainment, should not be neglected by pediatricians. In the field of public health, some serious games are a means to decrease drug consumption and improve sexual health behavior in adolescents. In schools, serious games can be used to change students' perception of the disease of one of their classmates, or to train students on basic life support. Serious games are also used with patients: they can distract them from a painful procedure, increase their compliance to treatments, or participate in their rehabilitation. Finally, serious games allow healthcare professionals to train on the management of various medical situations without risk. For every field of application, this review presents the rationale of the use of video games, followed by concrete examples of video games and the results of their scientific evaluation. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  10. A Novel Key-Frame Extraction Approach for Both Video Summary and Video Index

    Science.gov (United States)

    Lei, Shaoshuai; Xie, Gang; Yan, Gaowei

    2014-01-01

    Existing key-frame extraction methods are basically video summary oriented; yet the index task of key-frames is ignored. This paper presents a novel key-frame extraction approach which can be available for both video summary and video index. First a dynamic distance separability algorithm is advanced to divide a shot into subshots based on semantic structure, and then appropriate key-frames are extracted in each subshot by SVD decomposition. Finally, three evaluation indicators are proposed to evaluate the performance of the new approach. Experimental results show that the proposed approach achieves good semantic structure for semantics-based video index and meanwhile produces video summary consistent with human perception. PMID:24757431

  11. Sound for digital video

    CERN Document Server

    Holman, Tomlinson

    2013-01-01

    Achieve professional quality sound on a limited budget! Harness all new, Hollywood style audio techniques to bring your independent film and video productions to the next level.In Sound for Digital Video, Second Edition industry experts Tomlinson Holman and Arthur Baum give you the tools and knowledge to apply recent advances in audio capture, video recording, editing workflow, and mixing to your own film or video with stunning results. This fresh edition is chockfull of techniques, tricks, and workflow secrets that you can apply to your own projects from preproduction

  12. Green Power Partnership Videos

    Science.gov (United States)

    The Green Power Partnership develops videos on a regular basis that explore a variety of topics including, Green Power partnership, green power purchasing, Renewable energy certificates, among others.

  13. Evaluating the Relationship between Cognitive Style and Pre-Service Teachers' Preconceived Notions about Adopting Console Video Games for Use in Future Classrooms

    Science.gov (United States)

    McDaniel, Rudy; Kenny, Robert

    2013-01-01

    This article explores the impact of perceptual cognitive styles on pre-service teachers' attitudes toward video games. Using a cognitive style continuum measuring field dependence and field independence, the authors conducted an exploratory study to measure the potential impact of cognitive style on pre-service teachers' dispositions towards the…

  14. Evaluating the Use of Streaming Video To Support Student Learning in a First-Year Life Sciences Course for Student Nurses.

    Science.gov (United States)

    Green, Sue M.; Voegeli, David; Harrison, Maureen; Phillips, Jackie; Knowles, Jess; Weaver, Mike; Shepard, Kerry

    2003-01-01

    Nursing students (n=656) used streaming videos on immune, endocrine, and neurological systems using Blackboard software. Of students who viewed all three, 32% found access easy, 59% enjoyed them, and 25% felt very confident in their learning. Results were consistent across three different types and embedding methods. Technical and access problems…

  15. Attention modeling for video quality assessment

    DEFF Research Database (Denmark)

    You, Junyong; Korhonen, Jari; Perkis, Andrew

    2010-01-01

    This paper proposes to evaluate video quality by balancing two quality components: global quality and local quality. The global quality is a result from subjects allocating their ttention equally to all regions in a frame and all frames n a video. It is evaluated by image quality metrics (IQM) ith...... quality modeling algorithm can improve the performance of image quality metrics on video quality assessment compared to the normal averaged spatiotemporal pooling scheme....... averaged spatiotemporal pooling. The local quality is derived from visual attention modeling and quality variations over frames. Saliency, motion, and contrast information are taken into account in modeling visual attention, which is then integrated into IQMs to calculate the local quality of a video frame...

  16. Evaluation of the C-MAC Miller Video Laryngoscope Sizes 0 and 1 During Tracheal Intubation of Infants Less Than 10 kg.

    Science.gov (United States)

    Raimann, Florian J; Cuca, Colleen E; Kern, Detlev; Zacharowski, Kai; Rolle, Udo; Meininger, Dirk; Weber, Christian F; Byhahn, Christian; Mutlak, Haitham

    2017-10-02

    Video laryngoscopy has primarily been developed to assist in difficult airways. Using video laryngoscopy in pediatric airway management is an up-and-coming topic. The aim of the presented study was to compare the intubation conditions obtained when using the C-MAC video laryngoscope with Miller blades sizes 0 and 1 for standard direct laryngoscopy and indirect laryngoscopy in children weighing less than 10 kg. This was a prospective study. The study was performed in a university hospital. Following ethical approval, 86 infants weighing less than 10 kg and undergoing surgery under general anesthesia were studied prospectively. Indirect and direct laryngoscopy either with C-MAC Miller blade size 0 or size 1. First, direct laryngoscopy was performed, and the best obtained view was graded without looking at the video monitor. A second investigator blinded to the view obtained under direct laryngoscopy graded the laryngeal view on the video monitor. Time to intubation, intubation conditions, and intubation attempts were recorded. In infants less than 10 kg, intubation conditions were excellent. There were no significant differences between the use of Miller blade 0 or 1 in reference to Cormack-Lehane grade, time to intubation, time to best view, or intubation attempts. Comparing direct and indirect intubation conditions using either Miller blade 0 or 1 revealed that the use of indirect laryngoscopy provided a significantly better view (P < 0.05) of the vocal cords. In 3 infants weighing more than 8 kg, the Miller blade 0 was described as too short and narrow for intubation. Both devices allowed for an excellent visualization of the vocal cords.

  17. FY16 Annual Accomplishments - Waste Form Development and Performance: Evaluation Of Ceramic Waste Forms - Comparison Of Hot Isostatic Pressed And Melt Processed Fabrication Methods

    Energy Technology Data Exchange (ETDEWEB)

    Amoroso, J. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Dandeneau, C. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2016-10-13

    FY16 efforts were focused on direct comparison of multi-phase ceramic waste forms produced via melt processing and HIP methods. Based on promising waste form compositions previously devised at SRNL, simulant material was prepared at SRNL and a portion was sent to the Australian Nuclear Science and Technology Organization (ANSTO) for HIP treatments, while the remainder of the material was melt processed at SRNL. The microstructure, phase formation, elemental speciation, and leach behavior, and radiation stability of the fabricated ceramics was performed. In addition, melt-processed ceramics designed with different fractions of hollandite, zirconolite, perovskite, and pyrochlore phases were investigated. for performance and properties.

  18. Teaching Form as Form

    DEFF Research Database (Denmark)

    Keiding, Tina Bering

    2012-01-01

    , this book offers both inspiration to teaching form and a systematic framework for pedagogical and didactical reflection on this topic. In this sense, it shapes and professionalizes design teaching, and contributes to the development of the double-professionalism, which is so essential for teachers in modern...... means that form serves both as the connective value and as the concept for reflection. In other words, form is observed as form, not anything else. The didactical challenge of teaching form as form is accentuated by students’ everyday-based pre-orientation towards function at the expense of form...... in this book that they are highly interested in both the declarative and formative dimension of making form. Methodologically, the courses described in the contributions have a strong focus on student-centered experiential activities, thereby implicitly claiming that students must learn to make form...

  19. VORTEX: video retrieval and tracking from compressed multimedia databases--template matching from MPEG-2 video compression standard

    Science.gov (United States)

    Schonfeld, Dan; Lelescu, Dan

    1998-10-01

    In this paper, a novel visual search engine for video retrieval and tracking from compressed multimedia databases is proposed. Our approach exploits the structure of video compression standards in order to perform object matching directly on the compressed video data. This is achieved by utilizing motion compensation--a critical prediction filter embedded in video compression standards--to estimate and interpolate the desired method for template matching. Motion analysis is used to implement fast tracking of objects of interest on the compressed video data. Being presented with a query in the form of template images of objects, the system operates on the compressed video in order to find the images or video sequences where those objects are presented and their positions in the image. This in turn enables the retrieval and display of the query-relevant sequences.

  20. Impact of Compression on the Video Quality

    Directory of Open Access Journals (Sweden)

    Miroslav Uhrina

    2012-01-01

    Full Text Available This article deals with the impact of compression on the video quality. In the first part, a short characteristic of the most used MPEG compression standards is written. In the second part, the parameter Group of Picture (GOP with particular I, P, B frames is explained. The third part focuses on the objective metrics which were used for evaluating the video quality. In the fourth part, the measurements and the experimental results are described.

  1. Video Games as Equipment for Living

    OpenAIRE

    Soetaert, Ronald; Bourgonjon, Jeroen; Rutten, Kris

    2011-01-01

    In their article "Video Games as Equipment for Living" Ronald Soetaert, Jeroen Bourgonjon, and Kris Rutten postulate that with the emergence of new media there is need of a re-evaluation of all modes of communication and the ways in which literacy is conceptualized. Drawing on the concept of multi-literacy they suggest a rhetorical/ anthropological meta-perspective to describe human beings as symbol using animals and focus on particular symbol systems: narrative, drama, and video games. Speci...

  2. Physics Girl: Where Education meets Cat Videos

    Science.gov (United States)

    Cowern, Dianna

    YouTube is usually considered an entertainment medium to watch cats, gaming, and music videos. But educational channels have been gaining momentum on the platform, some garnering millions of subscribers and billions of views. The Physics Girl YouTube channel is an educational series with PBS Digital Studios created by Dianna Cowern. Using Physics Girl as an example, this talk will examine what it takes to start a short-form educational video series, including logistics and resources. One benefit of video is that every failure is documented on camera and can, and will, be used in this talk as a learning tool. We will look at the channels demographical reach, discuss best practices for effective physics outreach, and survey how online media and technology can facilitate good and bad learning. The aim of this talk is to show how videos are a unique way to share science and enrich the learning experience, in and out of a classroom.

  3. Defocus cue and saliency preserving video compression

    Science.gov (United States)

    Khanna, Meera Thapar; Chaudhury, Santanu; Lall, Brejesh

    2016-11-01

    There are monocular depth cues present in images or videos that aid in depth perception in two-dimensional images or videos. Our objective is to preserve the defocus depth cue present in the videos along with the salient regions during compression application. A method is provided for opportunistic bit allocation during the video compression using visual saliency information comprising both the image features, such as color and contrast, and the defocus-based depth cue. The method is divided into two steps: saliency computation followed by compression. A nonlinear method is used to combine pure and defocus saliency maps to form the final saliency map. Then quantization values are assigned on the basis of these saliency values over a frame. The experimental results show that the proposed scheme yields good results over standard H.264 compression as well as pure and defocus saliency methods.

  4. Investigation of the performance of video analytics systems with compressed video using the i-LIDS sterile zone dataset

    Science.gov (United States)

    Mahendrarajah, Prashath

    2011-11-01

    Recent years have seen significant investment and increasingly effective use of Video Analytics (VA) systems to detect intrusion or attacks in sterile areas. Currently there are a number of manufacturers who have achieved the Imagery Library for Intelligent Detection System (i-LIDS) primary detection classification performance standard for the sterile zone detection scenario. These manufacturers have demonstrated the performance of their systems under evaluation conditions using an uncompressed evaluation video. In this paper we consider the effect on the detection rate of an i-LIDS primary approved sterile zone system using compressed sterile zone scenario video clips as the input. The preliminary test results demonstrate a change time of detection rate with compression as the time to alarm increased with greater compression. Initial experiments suggest that the detection performance does not linearly degrade as a function of compression ratio. These experiments form a starting point for a wider set of planned trials that the Home Office will carry out over the next 12 months.

  5. Associations between children's video game playing and psychosocial health: Information from both parent and child reports

    NARCIS (Netherlands)

    Lobel, A.M.; Granic, I.; Stone, L.L.; Engels, R.C.M.E.

    2014-01-01

    Video games are a highly heterogeneous form of entertainment. As recent reviews highlight, this heterogeneity makes likely that video games have both positive and negative consequences for child development. This study investigated the associations between gaming frequency and psychosocial health

  6. [Validity and reproducibility of two direct observation assessment forms for evaluation of internal medicine residents' clinical skills].

    Science.gov (United States)

    Pottier, P; Cohen Aubart, F; Steichen, O; Desprets, M; Pha, M; Espitia, A; Georgin-Lavialle, S; Morel, A; Hardouin, J B

    2018-01-01

    The revision of the French medical studies' third cycle ought to be competency-based. In internal medicine, theoretical and practical knowledge will be assessed online with e-learning and e-portfolio. In parallel, a reflection about clinical skills assessment forms is currently ongoing. In this context, our aim was to assess the reproducibility and validity of two assessment forms based on direct clinical observation. A prospective and multicentric study has been conducted from November 2015 to October 2016 aiming at evaluating the French translations of the MINI-Clinical Examination Exercice (MINI-CEX) and the Standardized Patient Satisfaction Questionnaire (SPSQ). Included residents have been assessed 2 times over a period of 6 months by the same binoma of judges. Nineteen residents have been included. The inter-judge reproducibility was satisfactory for the MINI-CEX: intraclass coefficients (ICC) between 0.4 and 0.8 and moderate for the SPSQ: ICC between 0.2 and 0.7 with a good internal coherence for both questionnaires (Cronbach between 0.92 and 0.94). Significant differences between the distributions of the scores given by the judges and a significant inter-center variability have been found. If the absolute value of the scores should not be taken into account in the evaluation process given its high variability, it could be of interest for the follow-up of the progression in the competencies. These forms could support the residents' debriefing based on the general trends given by the scores. Copyright © 2017 Société Nationale Française de Médecine Interne (SNFMI). Published by Elsevier SAS. All rights reserved.

  7. Evaluating laboratory request forms submitted to haematology and blood transfusion departments at a hospital in Northwest Nigeria

    Directory of Open Access Journals (Sweden)

    Feyisayo Jegede

    2016-02-01

    Full Text Available Background: The laboratory request form (LRF is a communication link between laboratories, requesting physicians and users of laboratory services. Inadequate information or errors arising from the process of filling out LRFs can significantly impact the quality of laboratory results and, ultimately, patient outcomes.Objective: We assessed routinely-submitted LRFs to determine the degree of correctness, completeness and consistency.Methods: LRFs submitted to the Department of Haematology (DH and Blood Transfusion Services (BTS of Aminu Kano Teaching Hospital in Kano, Nigeria, between October 2014 and December 2014, were evaluated for completion of all items on the forms. Performance in four quality indicator domains, including patient identifiers, test request details, laboratory details and physician details, was derived as a composite percentage.Results: Of the 2084 LRFs evaluated, 999 were from DH and 1085 from BTS. Overall, LRF completeness was 89.5% for DH and 81.2% for BTS. Information on patient name, patient location and laboratory number were 100% complete for DH, whereas only patient name was 100% complete for BTS. Incomplete information was mostly encountered on BTS forms for physician’s signature (60.8% and signature of laboratory receiver (63.5%. None of the DH and only 9.4% of BTS LRFs met all quality indicator indices.Conclusion: The level of completion of LRFs from these two departments was suboptimal. This underscores the need to review and redesign the LRF, improve on training and communication between laboratory and clinical staff and review specimen rejection practices.

  8. Acoustic Neuroma Educational Video

    Medline Plus

    Full Text Available ... a Group Upcoming Events Video Library Photo Gallery One-on-One Support ANetwork Peer Support Program Community Connections Overview ... group Back Upcoming events Video Library Photo Gallery One-on-One Support Back ANetwork Peer Support Program ...

  9. Reviews in instructional video

    NARCIS (Netherlands)

    van der Meij, Hans

    2017-01-01

    This study investigates the effectiveness of a video tutorial for software training whose construction was based on a combination of insights from multimedia learning and Demonstration-Based Training. In the videos, a model of task performance was enhanced with instructional features that were

  10. Digital Video Editing

    Science.gov (United States)

    McConnell, Terry

    2004-01-01

    Monica Adams, head librarian at Robinson Secondary in Fairfax country, Virginia, states that librarians should have the technical knowledge to support projects related to digital video editing. The process of digital video editing and the cables, storage issues and the computer system with software is described.

  11. AudioMove Video

    DEFF Research Database (Denmark)

    2012-01-01

    Live drawing video experimenting with low tech techniques in the field of sketching and visual sense making. In collaboration with Rune Wehner and Teater Katapult.......Live drawing video experimenting with low tech techniques in the field of sketching and visual sense making. In collaboration with Rune Wehner and Teater Katapult....

  12. Making Good Physics Videos

    Science.gov (United States)

    Lincoln, James

    2017-01-01

    Online videos are an increasingly important way technology is contributing to the improvement of physics teaching. Students and teachers have begun to rely on online videos to provide them with content knowledge and instructional strategies. Online audiences are expecting greater production value, and departments are sometimes requesting educators…

  13. Acoustic Neuroma Educational Video

    Medline Plus

    Full Text Available ... support group for me? Find a Group Upcoming Events Video Library Photo Gallery One-on-One Support ANetwork Peer ... group for me? Find a group Back Upcoming events Video Library Photo Gallery One-on-One Support Back ANetwork ...

  14. Personal Digital Video Stories

    DEFF Research Database (Denmark)

    Ørngreen, Rikke; Henningsen, Birgitte Sølbeck; Louw, Arnt Vestergaard

    2016-01-01

    agenda focusing on video productions in combination with digital storytelling, followed by a presentation of the digital storytelling features. The paper concludes with a suggestion to initiate research in what is identified as Personal Digital Video (PDV) Stories within longitudinal settings, while...

  15. The Video Generation.

    Science.gov (United States)

    Provenzo, Eugene F., Jr.

    1992-01-01

    Video games are neither neutral nor harmless but represent very specific social and symbolic constructs. Research on the social content of today's video games reveals that sex bias and gender stereotyping are widely evident throughout the Nintendo games. Violence and aggression also pervade the great majority of the games. (MLF)

  16. Highlight detection for video content analysis through double filters

    Science.gov (United States)

    Sun, Zhonghua; Chen, Hexin; Chen, Mianshu

    2005-07-01

    Highlight detection is a form of video summarization techniques aiming at including the most expressive or attracting parts in the video. Most video highlights selection research work has been performed on sports video, detecting certain objects or events such as goals in soccer video, touch down in football and others. In this paper, we present a highlight detection method for film video. Highlight section in a film video is not like that in sports video that usually has certain objects or events. The methods to determine a highlight part in a film video can exhibit as three aspects: (a) locating obvious audio event, (b) detecting expressive visual content around the obvious audio location, (c) selecting the preferred portion of the extracted audio-visual highlight segments. We define a double filters model to detect the potential highlights in video. First obvious audio location is determined through filtering the obvious audio features, and then we perform the potential visual salience detection around the potential audio highlight location. Finally the production from the audio-visual double filters is compared with a preference threshold to determine the final highlights. The user study results indicate that the double filters detection approach is an effective method for highlight detection for video content analysis.

  17. Classifying smoke in laparoscopic videos using SVM

    Directory of Open Access Journals (Sweden)

    Alshirbaji Tamer Abdulbaki

    2017-09-01

    Full Text Available Smoke in laparoscopic videos usually appears due to the use of electrocautery when cutting or coagulating tissues. Therefore, detecting smoke can be used for event-based annotation in laparoscopic surgeries by retrieving the events associated with the electrocauterization. Furthermore, smoke detection can also be used for automatic smoke removal. However, detecting smoke in laparoscopic video is a challenge because of the changeability of smoke patterns, the moving camera and the different lighting conditions. In this paper, we present a video-based smoke detection algorithm to detect smoke of different densities such as fog, low and high density in laparoscopic videos. The proposed method depends on extracting various visual features from the laparoscopic images and providing them to support vector machine (SVM classifier. Features are based on motion, colour and texture patterns of the smoke. We validated our algorithm using experimental evaluation on four laparoscopic cholecystectomy videos. These four videos were manually annotated by defining every frame as smoke or non-smoke frame. The algorithm was applied to the videos by using different feature combinations for classification. Experimental results show that the combination of all proposed features gives the best classification performance. The overall accuracy (i.e. correctly classified frames is around 84%, with the sensitivity (i.e. correctly detected smoke frames and the specificity (i.e. correctly detected non-smoke frames are 89% and 80%, respectively.

  18. A video for teaching english tenses

    Directory of Open Access Journals (Sweden)

    Frida Unsiah

    2017-04-01

    Students of English Language Education Program in Faculty of Cultural Studies Universitas Brawijaya ideally master Grammar before taking the degree of Sarjana Pendidikan. However, the fact shows that they are still weak in Grammar especially tenses. Therefore, the researchers initiate to develop a video as a media to teach tenses. Objectively, by using video, students get better understanding on tenses so that they can communicate using English accurately and contextually. To develop the video, the researchers used ADDIE model (Analysis, Design, Development, Implementation, Evaluation. First, the researchers analyzed the students’ learning need to determine the product that would be developed, in this case was a movie about English tenses. Then, the researchers developed a video as the product. The product then was validated by media expert who validated attractiveness, typography, audio, image, and usefulness and content expert and validated by a content expert who validated the language aspects and tenses of English used by the actors in the video dealing with the grammar content, pronunciation, and fluency performed by the actors. The result of validation shows that the video developed was considered good. Theoretically, it is appropriate to be used English Grammar classes. However, the media expert suggests that it still needs some improvement for the next development especially dealing with the synchronization between lips movement and sound on the scenes while the content expert suggests that the Grammar content of the video should focus on one tense only to provide more detailed concept of the tense.

  19. Rheumatoid Arthritis Educational Video Series

    Medline Plus

    Full Text Available ... Patient Webcasts / Rheumatoid Arthritis Educational Video Series Rheumatoid Arthritis Educational Video Series This series of five videos ... member of our patient care team. Managing Your Arthritis Managing Your Arthritis Managing Chronic Pain and Depression ...

  20. Rheumatoid Arthritis Educational Video Series

    Medline Plus

    Full Text Available ... Corner / Patient Webcasts / Rheumatoid Arthritis Educational Video Series Rheumatoid Arthritis Educational Video Series This series of five videos was designed to help you learn more about Rheumatoid Arthritis (RA). You will learn how the diagnosis of ...

  1. Rheumatoid Arthritis Educational Video Series

    Science.gov (United States)

    ... Corner / Patient Webcasts / Rheumatoid Arthritis Educational Video Series Rheumatoid Arthritis Educational Video Series This series of five videos was designed to help you learn more about Rheumatoid Arthritis (RA). You will learn how the diagnosis of ...

  2. NEI You Tube Videos: Amblyopia

    Medline Plus

    Full Text Available ... questions Clinical Studies Publications Catalog Photos and Images Spanish Language Information Grants and Funding Extramural Research Division ... Low Vision Refractive Errors Retinopathy of Prematurity Science Spanish Videos Webinars NEI YouTube Videos: Amblyopia Embedded video ...

  3. Social video content delivery

    CERN Document Server

    Wang, Zhi; Zhu, Wenwu

    2016-01-01

    This brief presents new architecture and strategies for distribution of social video content. A primary framework for socially-aware video delivery and a thorough overview of the possible approaches is provided. The book identifies the unique characteristics of socially-aware video access and social content propagation, revealing the design and integration of individual modules that are aimed at enhancing user experience in the social network context. The change in video content generation, propagation, and consumption for online social networks, has significantly challenged the traditional video delivery paradigm. Given the massive amount of user-generated content shared in online social networks, users are now engaged as active participants in the social ecosystem rather than as passive receivers of media content. This revolution is being driven further by the deep penetration of 3G/4G wireless networks and smart mobile devices that are seamlessly integrated with online social networking and media-sharing s...

  4. Linguistic and cultural adaptation into Polish of the IKDC 2000 subjective knee evaluation form and the Lysholm scale.

    Science.gov (United States)

    Piontek, Tomasz; Ciemniewska-Gorzela, Kinga; Naczk, Jakub; Cichy, Kamil; Szulc, Andrzej

    2012-11-07

    The aim of the following paper was Polish cultural and linguistic adaptation including adaptation of particular questions, instructions and possible answers to 2000 IKDC knee form and Lysholm's scale. The cultural adaptation process of this questionnaire was made according to indicators of International Quality of Life Assessment (IQOLA) project, placed in Journal of Clinical Epidemiology. Testing version (pre-final test) was carried out on 30 patients suffering from instability of a knee. Patients underwent arthroscopic reconstruction of the anterior cruciate ligament. The period from operation to filling in the questionnaires took 2 years. The questionnaire was filled up twice, at intervals from 2 days to 2 weeks. We received cultural and linguistic adapted knee evaluation scales which are similar to the original version according to the psychometric proprieties such as accuracy of a single question and whole scales. We were able to develop a reliable, ISAKOS/ESSKA-compliant instrument for subjective knee function evaluation to be used in the population of Polish patients following arthroscopic reconstruction of anterior cruciate ligament. Polish version of IKDC 2000 questionnaire is more reliable--i.e. more useful in clinical evaluation of patients with ACL damage--than the Polish rendition of Lysholm scale.

  5. Using imagery perspective to access two distinct forms of self-knowledge: associative evaluations versus propositional self-beliefs.

    Science.gov (United States)

    Libby, Lisa K; Valenti, Greta; Hines, Karen A; Eibach, Richard P

    2014-04-01

    When mentally simulating life events, people may visualize them from either an actor's 1st-person or observer's 3rd-person visual perspective. Two experiments demonstrated that visual perspective differentially determines reliance on 2 distinct forms of self-knowledge: associative evaluations of the simulated environment and propositional self-beliefs about relevant values and preferences. Implicit measures indexed associative evaluations of environmental stimuli (political candidates, outgroups); explicit measures indexed propositional self-beliefs about relevant personal values or preferences. A separate session manipulated participants' visual perspective for mentally simulating a pertinent event (voting, interracial interaction) as they forecasted their behavior or feelings if that event occurred. Forecasts corresponded more closely with associative evaluations from the 1st-person than 3rd-person perspective but more closely with propositional self-beliefs from the 3rd-person than 1st-person. Results have practical implications for channeling the power of mental simulation to desired ends and theoretical implications for understanding the pathways by which imagery and mental simulation shape cognition.

  6. Evaluation of dental and basal arch forms using cone-beam CT and 3D virtual models of normal occlusion.

    Science.gov (United States)

    Bayome, Mohamed; Park, Jae Hyun; Han, Seong Ho; Baek, Seung-Hak; Sameshima, Glenn T; Kook, Yoon-Ah

    2013-05-01

    OBIECTIVES: To evaluate the relationship between the mandibular dental and basal arches using CBCT, and to assess the correlation between basal arch dimensions derived from CBCT and 3-dimensional (3D) virtual models in a cohort sample exhibiting normal occlusions. The facial axis (FA) and root centre (RC) points of mandibular teeth were identified on 32 CBCT images. FA and WALA points were digitised on 3D models of 28 mandibular casts from the same sample. The relationships between dental and basal arch dimensions, and between the two basal depth dimensions derived from RC and WALA points were statistically assessed by Pearson's correlation. Strong correlations were found between dental and basal intercanine and intermolar arch widths. Also, the basal intercanine width showed a moderate correlation with dental intermolar width and depth. The basal intercanine and intermolar widths measured on 3D models showed moderate correlations with those measurements on CBCT, whereas the basal canine and molar depths showed no correlations. The dental and basal anterior and posterior arch widths were strongly correlated in normal occlusion. No correlations were found between the arch depths measured from WALA points and RC points. Hence, RC points may represent more useable landmarks compared to WALA points in the evaluation of basal arch forms. It is recommended that the relationship between the dental and basal arches is evaluated during treatment planning in order to improve arch co-ordination.

  7. A new approach to obtain metric data from video surveillance: Preliminary evaluation of a low-cost stereo-photogrammetric system.

    Science.gov (United States)

    Russo, Paolo; Gualdi-Russo, Emanuela; Pellegrinelli, Alberto; Balboni, Juri; Furini, Alessio

    2017-02-01

    Using an interdisciplinary approach the authors demonstrate the possibility to obtain reliable anthropometric data of a subject by means of a new video surveillance system. In general the use of current video surveillance systems provides law enforcement with useful data to solve many crimes. Unfortunately the quality of the images and the way in which they are taken often makes it very difficult to judge the compatibility between suspect and perpetrator. In this paper, the authors present the results obtained with a low-cost photogrammetric video surveillance system based on a pair of common surveillance cameras synchronized with each other. The innovative aspect of the system is that it allows estimation with considerable accuracy not only of body height (error 0.1-3.1cm, SD 1.8-4.5cm) but also of other anthropometric characters of the subject, consequently with better determination of the biological profile and greatly increased effectiveness of the judgment of compatibility. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  8. AViTExt: Automatic Video Text Extraction, A new Approach for video content indexing Application

    OpenAIRE

    Bouaziz, Baseem; Zlitni, Tarek; Walid MAHDI

    2013-01-01

    In this paper, we propose a spatial temporal video-text detection technique which proceed in two principal steps:potential text region detection and a filtering process. In the first step we divide dynamically each pair of consecutive video frames into sub block in order to detect change. A significant difference between homologous blocks implies the appearance of an important object which may be a text region. The temporal redundancy is then used to filter these regions and forms an effectiv...

  9. Evaluation quantitative des produits formés lors de l'évolution géochimique de la matière organique Quantitative Evaluation of Products Formed During the Geochemical Evolution of Organic Matter

    Directory of Open Access Journals (Sweden)

    Pelet R.

    2006-11-01

    Full Text Available L'évaluation quantitative des produits mobiles formés lors de l'évolution géochimique de la matière organique est nécessaire parce qu'on ne peut jamais retrouver ces produits en place dans. la roche où ils ont pris naissance. Ils ont, en effet, pu migrer durant l'histoire géologique, et de toute manière une fraction, importante et non connue, se perd lors de la prise des échantillons puis de leur conservation avant analyse. La connaissance de l'analyse d'un état E et d'un état plus évolué E' ne suffit pas pour reconstituer les quantités de produits formés. La pyrolyse type Rock-Eval sur kérogènes, avec détermination du carbone résiduel, permet par contre, à partir d'une hypothèse raisonnable, de calculer les hydrocarbures produits. L'analyse élémentaire permet d'y ajouter CO2, H2O, H2S et N2 (considérés comme seuls produits à côté des hydrocarbures. Une analyse chromatographique sommaire supplémentaire permet d'estimer la composition globale des hydrocarbures. Dans le cas des roches, on propose des techniques de correction de l'effet de matrice pratiquement utilisables et qui permettent de retrouver les résultats précédents, au prix d'une incertitude accrue. The mobile products formed during the geochemical evolution of organic matter must be quantitatively evaluated because these products can never be found in place in the rock where they were formed. Indeed, they may have migrated during geological history, and in any case a large and unknown fraction gets lost when samples are taken and then stored before being analysed. Knowing the elemental analysis of a state E and of a more evolved state E' does not suffice for recreating the amounts of products formed. On the other hand Rock-Eval type pyrolysis of kerogens, including the determination of the residual carbon, can be used to compute the hydrocarbons produced, on the basis of a reasonable hypothesis. Elemental analysis then enables the evaluation of CO2, H2O

  10. Video tonal stabilization via color states smoothing.

    Science.gov (United States)

    Wang, Yinting; Tao, Dacheng; Li, Xiang; Song, Mingli; Bu, Jiajun; Tan, Ping

    2014-11-01

    We address the problem of removing video color tone jitter that is common in amateur videos recorded with hand-held devices. To achieve this, we introduce color state to represent the exposure and white balance state of a frame. The color state of each frame can be computed by accumulating the color transformations of neighboring frame pairs. Then, the tonal changes of the video can be represented by a time-varying trajectory in color state space. To remove the tone jitter, we smooth the original color state trajectory by solving an L1 optimization problem with PCA dimensionality reduction. In addition, we propose a novel selective strategy to remove small tone jitter while retaining extreme exposure and white balance changes to avoid serious artifacts. Quantitative evaluation and visual comparison with previous work demonstrate the effectiveness of our tonal stabilization method. This system can also be used as a preprocessing tool for other video editing methods.

  11. A new video programme

    CERN Multimedia

    CERN video productions

    2011-01-01

    "What's new @ CERN?", a new monthly video programme, will be broadcast on the Monday of every month on webcast.cern.ch. Aimed at the general public, the programme will cover the latest CERN news, with guests and explanatory features. Tune in on Monday 3 October at 4 pm (CET) to see the programme in English, and then at 4:20 pm (CET) for the French version.   var flash_video_player=get_video_player_path(); insert_player_for_external('Video/Public/Movies/2011/CERN-MOVIE-2011-129/CERN-MOVIE-2011-129-0753-kbps-640x360-25-fps-audio-64-kbps-44-kHz-stereo', 'mms://mediastream.cern.ch/MediaArchive/Video/Public/Movies/2011/CERN-MOVIE-2011-129/CERN-MOVIE-2011-129-Multirate-200-to-753-kbps-640x360-25-fps.wmv', 'false', 480, 360, 'https://mediastream.cern.ch/MediaArchive/Video/Public/Movies/2011/CERN-MOVIE-2011-129/CERN-MOVIE-2011-129-posterframe-640x360-at-10-percent.jpg', '1383406', true, 'Video/Public/Movies/2011/CERN-MOVIE-2011-129/CERN-MOVIE-2011-129-0600-kbps-maxH-360-25-fps-...

  12. Gamifying Video Object Segmentation.

    Science.gov (United States)

    Spampinato, Concetto; Palazzo, Simone; Giordano, Daniela

    2017-10-01

    Video object segmentation can be considered as one of the most challenging computer vision problems. Indeed, so far, no existing solution is able to effectively deal with the peculiarities of real-world videos, especially in cases of articulated motion and object occlusions; limitations that appear more evident when we compare the performance of automated methods with the human one. However, manually segmenting objects in videos is largely impractical as it requires a lot of time and concentration. To address this problem, in this paper we propose an interactive video object segmentation method, which exploits, on one hand, the capability of humans to identify correctly objects in visual scenes, and on the other hand, the collective human brainpower to solve challenging and large-scale tasks. In particular, our method relies on a game with a purpose to collect human inputs on object locations, followed by an accurate segmentation phase achieved by optimizing an energy function encoding spatial and temporal constraints between object regions as well as human-provided location priors. Performance analysis carried out on complex video benchmarks, and exploiting data provided by over 60 users, demonstrated that our method shows a better trade-off between annotation times and segmentation accuracy than interactive video annotation and automated video object segmentation approaches.

  13. An Accelerated Release Study to Evaluate Long-Acting Contraceptive Levonorgestrel-Containing in Situ Forming Depot Systems

    Directory of Open Access Journals (Sweden)

    Dileep R. Janagam

    2016-09-01

    Full Text Available Biodegradable polymer-based injectable in situ forming depot (ISD systems that solidify in the body to form a solid or semisolid reservoir are becoming increasingly attractive as an injectable dosage form for sustained (months to years parenteral drug delivery. Evaluation of long-term drug release from the ISD systems during the formulation development is laborious and costly. An accelerated release method that can effectively correlate the months to years of long-term release in a short time such as days or weeks is economically needed. However, no such accelerated ISD system release method has been reported in the literature to date. The objective of the current study was to develop a short-term accelerated in vitro release method for contraceptive levonorgestrel (LNG-containing ISD systems to screen formulations for more than 3-month contraception after a single subcutaneous injection. The LNG-containing ISD formulations were prepared by using biodegradable poly(lactide-co-glycolide and polylactic acid polymer and solvent mixtures containing N-methyl-2-pyrrolidone and benzyl benzoate or triethyl citrate. Drug release studies were performed under real-time (long-term conditions (PBS, pH 7.4, 37 °C and four accelerated (short-term conditions: (A PBS, pH 7.4, 50 °C; (B 25% ethanol in PBS, pH 7.4, 50 °C; (C 25% ethanol in PBS, 2% Tween 20, pH 7.4, 50 °C; and (D 25% ethanol in PBS, 2% Tween 20, pH 9, 50 °C. The LNG release profile, including the release mechanism under the accelerated condition D within two weeks, correlated (r2 ≥ 0.98 well with that under real-time conditions at four months.

  14. Accuracy of Different Mini Nutritional Assessment Reduced Forms to Evaluate the Nutritional Status of Elderly Hospitalised Diabetic Patients.

    Science.gov (United States)

    Martín, A; Ruiz, E; Sanz, A; García, J M; Gómez-Candela, C; Burgos, R; Matía, P; Ramalle-Gomera, E

    2016-04-01

    Disease-associated malnutrition (DAM) is a health problem involving all sanitary levels, especially hospitalised elderly patients. Different MNA (Mini Nutritional Assessment)-based forms have been validated in different settings, but it remains unclear if they are appropriate to evaluate the nutritional status of geriatric hospitalised patients with diabetes. The aim of this work was to analyse the accuracy of several MNA reduced forms to detect malnutrition in hospitalised elderly diabetic patients. A multicentre observational study was carried out in diabetic patients, who were over the age of 65, from 35 Spanish hospitals. Principal component analysis (PCA) selected the minimal components to elaborate the newly-proposed reduced new version of the MNA (r-MNA). Cohen's Kappa index (KI), with its 95% confidence interval (CI), was used to measure the agreement between the different reduced forms (r-MNA, MNA-SF-BMI, MNA-SF-CC, m-MNA) with the original MNA. Five hundred and ninety-one elderly diabetic patients were included in the study. ROC analysis determined the following cut-off points for the newly proposed r MNA: 0-12-15 "well-nourished". The upper cut-off point demonstrated a sensitivity of 87.7%, a specificity of 78.3% and an area under the curve of 0.93. The lower cut-off point showed a sensitivity of 95.9%, a specificity of 78.3% and an area under the curve of 0.95. The best agreement with the original MNA was observed for the MNA-SF-BMI (Κ index 80.7; 95% CI: 77.4-84) and the worst for the r-MNA (Κ index 72; 95% CI: 68.2-75.4). This study found that MNA-SF-BMI is the most accurate screening tool for determining the nutritional status of hospitalised diabetic elderly patients. This is an easy-to-use, fast screening tool with a low risk of misclassification.

  15. [The evaluation of the quality of life in the patients presenting with various forms of chronic otitis media].

    Science.gov (United States)

    Kosyakov, S Ya; Minavnina, Yu V; Gunenkov, A V

    2017-01-01

    Chronic otitis media (COM) is a widespread pathological condition that affects up to 2% of the general population. Certain forms of this disease markedly deteriorate the quality of life of the patients which makes them overestimate the severity of harm to their health status and can be a cause of inflated expectations as regards the results of the planned surgical treatment. The linking element between the patient's expectations and the outcomes of the surgical intervention may be the recently developed questionnaires for the evaluation of the health-related quality of life (HRQoL). One of them, the COMQ-12 questionnaire, was devised to estimate the subjective reports by the patients concerning the deterioration of their quality of life attributable to chronic otitis media. The objective of the present study was to characterize the value of the 5-point Russian-language version of COMQ-12 for the evaluation of each of its 12 items concerning various aspects of health based on the personal opinions of the patients suffering from chronic otitis media The study included 108 patients 49 of whom were men and 59 women (45% and 55% respectively) at the age varying from 16 to 84 years. The COMQ-12 scores, according to the reports of individual patients, ranged from 4 to 43 of the 60 ones possible. The average score was 19.4 (SD=8.3). The overall median COMQ-12 score was 20, and the mode scored 14. The Cronbach-alpha index was equal to 0.860. The Russian-language version of the COMQ-12 questionnaire provides a reliable tool for the estimation of the quality of life in the patients presenting with various forms of chronic otitis media.

  16. Interactive video algorithms and technologies

    CERN Document Server

    Hammoud, Riad

    2006-01-01

    This book covers both algorithms and technologies of interactive videos, so that businesses in IT and data managements, scientists and software engineers in video processing and computer vision, coaches and instructors that use video technology in teaching, and finally end-users will greatly benefit from it. This book contains excellent scientific contributions made by a number of pioneering scientists and experts from around the globe. It consists of five parts. The first part introduces the reader to interactive video and video summarization and presents effective methodologies for automatic abstraction of a single video sequence, a set of video sequences, and a combined audio-video sequence. In the second part, a list of advanced algorithms and methodologies for automatic and semi-automatic analysis and editing of audio-video documents are presented. The third part tackles a more challenging level of automatic video re-structuring, filtering of video stream by extracting of highlights, events, and meaningf...

  17. [Evaluation of the tree form quality of middle-aged Pinus tabuliformis plantation under different canopy densities in Huanglong Mountains, Northwest China].

    Science.gov (United States)

    You, Jian-jian; Zhang, Wen-hui; Deng, Lei

    2015-07-01

    To clarify the effects of different canopy densities on tree form quality of Pinus tabuliformis, a hierarchical indicator system was structured, which brought about a set of grading criteria to evaluate tree form quality of the middle-aged P. tabuliformis plantation under four canopy densities in Huanglong Mountains by using the analytic hierarchy process (AHP). Plots were divided into four classes according to the stand canopy density (CD) : CDstraightness, forking ratio, height under living branch, number of branches, max-branch base diameter and average base diameter of branches, the tree form quality could be evaluated. Among these factors, stem straightness, forking ratio and DBH were the most important ones influencing the tree form quality with a total weight of 0.7382. So, these three indicators were the major determinants of tree form quality. The comprehensive scores of the tree form quality evaluations fluctuated as the canopy density decreased and topped at 90.28 when CD was valued at 0.75 (type 2). The indicators and evaluation system developed in this study were easy to operate, and quite fit for solving the quantity problem of the tree form quality evaluation. Our system would be capable for applications in evaluating the tree form quality of other tree species on the Loess Plateau.

  18. Ethical use of covert videoing techniques in detecting Munchausen syndrome by proxy.

    Science.gov (United States)

    Foreman, D M; Farsides, C

    1993-01-01

    Munchausen syndrome by proxy is an especially malignant form of child abuse in which the carer (usually the mother) fabricates or exacerbates illness in the child to obtain medical attention. It can result in serious illness and even death of the child and it is difficult to detect. Some investigators have used video to monitor the carer's interaction with the child without obtaining consent--covert videoing. The technique presents several ethical problems, including exposure of the child to further abuse and a breach of trust between carer, child, and the professionals. Although covert videoing can be justified in restricted circumstances, new abuse procedures under the Children Act now seem to make its use unethical in most cases. Sufficient evidence should mostly be obtained from separation of the child and carer or videoing with consent to enable action to be taken to protect the child under an assessment order. If the new statutory instruments prove ineffective in Munchausen syndrome by proxy covert videoing may need to be re-evaluated. PMID:8401021

  19. Categorizing Video Game Audio

    DEFF Research Database (Denmark)

    Westerberg, Andreas Rytter; Schoenau-Fog, Henrik

    2015-01-01

    This paper dives into the subject of video game audio and how it can be categorized in order to deliver a message to a player in the most precise way. A new categorization, with a new take on the diegetic spaces, can be used a tool of inspiration for sound- and game-designers to rethink how...... they can use audio in video games. The conclusion of this study is that the current models' view of the diegetic spaces, used to categorize video game audio, is not t to categorize all sounds. This can however possibly be changed though a rethinking of how the player interprets audio....

  20. Brains on video games

    OpenAIRE

    Bavelier, Daphne; Green, C. Shawn; Han, Doug Hyun; Renshaw, Perry F.; Merzenich, Michael M.; Gentile, Douglas A.

    2011-01-01

    The popular press is replete with stories about the effects of video and computer games on the brain. Sensationalist headlines claiming that video games ‘damage the brain’ or ‘boost brain power’ do not do justice to the complexities and limitations of the studies involved, and create a confusing overall picture about the effects of gaming on the brain. Here, six experts in the field shed light on our current understanding of the positive and negative ways in which playing video games can affe...