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Video Clips (video + clips)
Selected AbstractsA Conservative Approach to Performing Transseptal Punctures Without the Use of Intracardiac Echocardiography: Stepwise Approach with Real-Time Video ClipsJOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 6 2007ALAN CHENG M.D. Atrial transseptal puncture as a means of accessing the left heart is a critical component of catheter ablation procedures for atrial fibrillation, left-sided accessory pathways, and access to the left ventricle in patients with certain types of prosthetic aortic valves. Although this technique has been performed successfully since the 1950s, severe and potentially life-threatening complications can still occur, including cardiac tamponade and/or death. Some have adopted the use of intracardiac echocardiography, but our laboratory and many others throughout the world have successfully relied on fluoroscopic imaging alone. The aim of this brief report is to describe in detail our technique for performing transseptal punctures during catheter ablation procedures for atrial fibrillation. We employ a similar approach when targeting left-sided accessory pathways, although only a single transseptal is performed in those cases. Utilizing a series of real-time video clips, we describe our technique of double transseptal puncture and illustrate in detail ways in which to avoid common pitfalls. [source] Hardware architecture for a visualization classroom: VizClassCOMPUTER APPLICATIONS IN ENGINEERING EDUCATION, Issue 4 2004Tara C. Hutchinson Abstract Interactive learning, critical thinking, creative problem-solving, and problem-based learning are all critical elements for enhancing engineering education. Visualization can provide the much needed computer-assisted design and analysis environment to foster problem-based learning, while virtual reality (VR) can provide the environment for hands-on manipulation, stimulating interactive learning in the engineering classroom. To provide such a space, at the University of California, Irvine a new interactive, spatially balanced learning environment, termed VizClass, has been developed. VizClass incorporates a specially designed lecture room and laboratory integrating both 2- and 3-dimensional spatial learning by coupling a series of interactive projection display boards (touch sensitive whiteboards) and a semi-immersive 3D wall display. Control of devices integrated with VizClass is supported via a centrally located, easy to activate, touch-sensitive display. Digital material, including slides, web content, video clips, sound files, numerical simulations, or animations may be loaded and presented by instructors using either 2D or 3D modalities. This environment has already been integrated into both undergraduate and graduate level courses, providing a balanced spatial learning environment for students. This article describes the unique hardware architecture developed to support this new environment and presents the first course activities conducted within the space. © 2004 Wiley Periodicals, Inc. Comput Appl Eng Educ 12: 232,241, 2004; Published online in Wiley InterScience (www.interscience.wiley.com); DOI 10.1002/cae.20024 [source] Interobserver agreement in endoscopic evaluation of reflux esophagitis using a modified Los Angeles classification incorporating grades N and M: A validation study in a cohort of Japanese endoscopistsDISEASES OF THE ESOPHAGUS, Issue 4 2008H. Miwa SUMMARY., The Los Angeles classification system is the most widely employed criteria associated with the greatest interobserver agreement among endoscopists. In Japan, the Los Angeles classification system has been modified (modified LA system) to include minimal changes as a distinct grade of reflux esophagitis, rather than as auxiliary findings. This adds a further grading M defined as minimal changes to the mucosa, such as erythema and/or whitish turbidity. The modified LA system has come to be used widely in Japan. However, there have been few reports to date that have evaluated the interobserver agreement in diagnosis when using the modified LA classification system incorporating these minimal changes as an additional grade. A total of 100 endoscopists from university hospitals and community hospitals, as well as private practices in the Osaka-Kobe area participated in the study. A total of 30 video clips of 30,40 seconds duration, mostly showing the esophagocardiac junction, were created and shown to 100 endoscopists using a video projector. The participating endoscopists completed a questionnaire regarding their clinical experience and rated the reflux esophagitis as shown in the video clips using the modified LA classification system. Agreement was assessed employing kappa (,) statistics for multiple raters. The , -value for all 91 endoscopists was 0.094, with a standard error of 0.002, indicating poor interobserver agreement. The endoscopists showed the best agreement on diagnosing grade A esophagitis (0.167), and the poorest agreement when diagnosing grade M esophagitis (0.033). The , -values for the diagnoses of grades N, M, and A esophagitis on identical video pairs were 0.275,0.315, with a standard error of 0.083,0.091, indicating fair intraobserver reproducibility among the endoscopists. The study results consistently indicate poor agreement regarding diagnoses as well as fair reproducibility of these diagnoses by endoscopists using the modified LA classification system, regardless of age, type of practice, past endoscopic experience, or current workload. However, grade M reflux esophagitis may not necessarily be irrelevant, as it may suggest an early form of reflux disease or an entirely new form of reflux esophagitis. Further research is required to elucidate the pathophysiological basis of minimal change esophagitis. [source] Interobserver agreement in neonatal seizure identificationEPILEPSIA, Issue 9 2009Aileen Malone Summary Objectives:, Accurate diagnosis of neonatal seizures is critically important and is often made clinically, without EEG (electroencephalography) monitoring. This observational study aimed to determine the accuracy and interobserver reliability of healthcare professionals in distinguishing clinically manifested seizures from other neonatal movements, when presented with clinical histories and digital video recordings only. Methods:, Twenty digital video recordings of paroxysmal movements in term and preterm infants were selected from a video-EEG database. The movements were categorized as seizure and nonseizure using EEG. Health care professionals (n = 137) from eight neonatal intensive care units (NICUs) were shown the video recordings with additional relevant clinical data, excluding EEG findings. The observers were asked to indicate which movements they considered to be seizure or nonseizure. A multirater Kappa statistic was used to assess agreement between observers and with the true diagnosis. Results:, Twenty video clips (11 seizure, 9 nonseizure) were evaluated by 91 doctors and 46 other professionals. The average number of correctly identified events was 10/20. Clonic seizures were correctly identified most frequently (range 36.5,95.6% of observers). Subtle seizures were poorly identified (range 20.4,49.6% of observers). The interobserver agreement (Kappa) for doctors and other health care professionals was poor at 0.21 and 0.29, respectively. Agreement with the correct diagnosis was also poor at 0.09 for doctors and ,0.02 for other healthcare professionals. Discussion:, It is often impossible to accurately differentiate between seizure-related and nonseizure movements in infants using clinical evaluation alone. In addition, doctors do not have a higher capacity for discriminating between neonatal paroxysmal events than other health care professionals. Until reliable continuous neurologic monitoring of newborn babies is available, it is likely that some babies with seizures will remain undetected and others with nonseizure movements will continue to be treated with potentially harmful anticonvulsants. [source] Effects of different viewing perspectives on somatosensory activations during observation of touchHUMAN BRAIN MAPPING, Issue 9 2009Michael Schaefer Abstract Previous studies showed that neurons in the monkey premotor cortex became active when performing a particular action and also when observing the same action performed by others. These findings suggest a mirror system for action observation. Recently, bimodal neurons, sensitive both to visual and tactile stimulation, were reported in the parietal cortex, suggesting a potential mirror neuron system for observing and experiencing tactile stimulation. Subsequently, a mirror neuron system for observed touch has been suggested. The current study was designed to determine whether the activation of a sensory mirror system during touch observation is affected by possible attributions of the observed touch to oneself (subjective view) or to somebody else (objective view). In the study, healthy volunteers observed video clips of a touched or nontouched hand either in an egocentric or in an allocentric perspective during functional magnetic resonance imaging. Results showed activation of somatosensory cortices when observing the hand being touched in egocentric as well as in the allocentric perspectives. Moreover, somatosensory responses differed depending on the perspective of the observed touch. We discuss the results in terms of a possible mirror neuron system for observed and experienced touch. Hum Brain Mapp 2009. © 2009 Wiley-Liss, Inc. [source] Efficient video retrieval using index structureINTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, Issue 2-3 2008Jing Zhang Abstract Video retrieval remains a challenging problem since most of traditional query algorithms are ineffectual and time-consuming. In this article, we proposed a new video retrieval method, which segments the video stream by visual similarity between neighboring frames, and adopt the high-dimensional index structure to organize segments. Furthermore, a new similarity measure is brought forward to improve the query accuracy by synthetically taking into account the visual similarity and temporal order among video segments. Based on the similarity measure, we propose a novel video clip retrieval algorithm which achieves high query efficiency by using restricted sliding window to construct candidate video clips. Experimental results show that the proposed video retrieval method is efficient and effective. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 113,123, 2008 [source] A Conservative Approach to Performing Transseptal Punctures Without the Use of Intracardiac Echocardiography: Stepwise Approach with Real-Time Video ClipsJOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 6 2007ALAN CHENG M.D. Atrial transseptal puncture as a means of accessing the left heart is a critical component of catheter ablation procedures for atrial fibrillation, left-sided accessory pathways, and access to the left ventricle in patients with certain types of prosthetic aortic valves. Although this technique has been performed successfully since the 1950s, severe and potentially life-threatening complications can still occur, including cardiac tamponade and/or death. Some have adopted the use of intracardiac echocardiography, but our laboratory and many others throughout the world have successfully relied on fluoroscopic imaging alone. The aim of this brief report is to describe in detail our technique for performing transseptal punctures during catheter ablation procedures for atrial fibrillation. We employ a similar approach when targeting left-sided accessory pathways, although only a single transseptal is performed in those cases. Utilizing a series of real-time video clips, we describe our technique of double transseptal puncture and illustrate in detail ways in which to avoid common pitfalls. [source] Can contrast-enhanced sonography distinguish benign from malignant breast masses?JOURNAL OF CLINICAL ULTRASOUND, Issue 4 2010P. G. Sorelli Abstract Background We investigated whether microvascular enhancement on contrast-enhanced sonographic (CEUS) imaging can aid in distinguishing between benign and malignant lesions and correlated these findings with histopathological findings. Method Fifteen patients with a palpable breast mass were recruited. Following informed consent, 4.8 mL of the microbubble contrast agent SonoVue was injected intravenously. Digital video clips of lesion enhancement were obtained and reviewed by a consultant radiologist who scored each lesion on the following characteristics: homogeneous versus heterogeneous enhancement, the presence or absence of focal defects, well- versus ill-defined margins and vascular morphology score (VMS). Result Histologically there were 7 malignant and 8 benign lesions. The calculated sensitivity for CEUS in the diagnosis of malignancy was 100%, with a 37.5% specificity. There was no statistically significant difference in overall mean VMS between the malignant and benign lesions. Conclusion The results of our study have not shown any additional benefit in the use of CEUS over conventional triple assessment. The positive trend seen in the higher mean VMS for the malignant tumors needs further investigation with a larger cohort of patients. © 2010 Wiley Periodicals, Inc. J Clin Ultrasound, 2010 [source] From kissing to belly stridulation: comparative analysis reveals surprising diversity, rapid evolution, and much homoplasy in the mating behaviour of 27 species of sepsid flies (Diptera: Sepsidae)JOURNAL OF EVOLUTIONARY BIOLOGY, Issue 11 2009N. PUNIAMOORTHY Abstract Our understanding of how fast mating behaviour evolves in insects is rather poor due to a lack of comparative studies among insect groups for which phylogenetic relationships are known. Here, we present a detailed study of the mating behaviour of 27 species of Sepsidae (Diptera) for which a well-resolved and supported phylogeny is available. We demonstrate that mating behaviour is extremely diverse in sepsids with each species having its own mating profile. We define 32 behavioural characters and document them with video clips. Based on sister species comparisons, we provide several examples where mating behaviour evolves faster than all sexually dimorphic morphological traits. Mapping the behaviours onto the molecular tree reveals much homoplasy, comparable to that observed for third positions of mitochondrial protein-encoding genes. A partitioned Bremer support (PBS) analysis reveals conflict between the molecular and behavioural data, but behavioural characters have higher PBS values per parsimony-informative character than DNA sequence characters. [source] 95 Development of macroalgal (seaweed) taxonomic keys utilizing digital & media technologyJOURNAL OF PHYCOLOGY, Issue 2003R. L. Lehman Digital, user-friendly seaweed identification keys and instructional materials can provide information that allows students and researchers to enhance and improve marine field and ecological studies by including macroalgae. In much of the scientific literature, the seaweeds are only characterized to division (red, green, and brown), sometimes to genus, and very rarely to species; so there is clearly a need for a reference that facilitates the identification of the seaweeds. Many of the problems occur because of the lack of user-friendly identification keys. However, it is not necessary to be an expert to identify seaweeds as many of the key characteristics used in their identification can be ascertained with the naked eye, a hand lens and an inexpensive microscope. What is needed is an identification guide that uses and displays important characters and identification structures visually (both macroscopic and microscopic) so that research scientists, students, teachers and the general public will be able to identify the seaweeds with confidence. We are using Lucid Professional software to construct digital keys for the identification of macroalgae from the Texas Coastal Bend. The advantages include: 1) key characters along with descriptions and images for specific macroalgae may be chosen from a geographic area of choice, 2) the user may evaluate the characters in any order and difficult or uncertain characters may be ignored, 3) descriptive pages of images, definitions, video clips and illustrations may be included for each taxon, and 4) the key can be displayed as a website or packaged as a CD to be used with laptop computers in the field. [source] Views of People with Intellectual Disabilities of Their Present and Future Living ArrangementsJOURNAL OF POLICY AND PRACTICE IN INTELLECTUAL DISABILITIES, Issue 3-4 2004Roy McConkey Abstract, To determine personal perceptions and preferences of present and potential living arrangements, 180 adults with intellectual disabilities were recruited to participate in 20 focus groups held across Northern Ireland. About half were living with family carers and the balance in a range of other types of accommodations. Verbal probing and video clips were used to elicit views on four different living options (residential homes, small group homes, supported living, and living with a nonrelated family). Four personal preference themes emerged that were common to all participants irrespective of where they lived: having their own bedroom, participating in household activities; having access to community activities, and maintaining contact with family and friends. Adults living on their own or in supported housing valued their independence and having access to support staff, whereas adults living in residential homes spoke of the importance of relationships with co-residents and staff. Overall, most of the adults were content with their present situation, although small group homes and supported living arrangements were the most popular alternatives to living with their families. The discussion group process was useful in eliciting comments and offering participants a chance to reflect on their personal perceptions of housing options. Overall, the findings point to the need for greater consideration of personal preferences in home option choice-making by housing and services providers. [source] Uptake, Modified Output, and Learner Perceptions of Recasts: Learner Responses as Language AwarenessMODERN LANGUAGE JOURNAL, Issue 1 2010TAKAKO EGI Recent research has shown that certain learners' responses to feedback, specifically repair and modified output, are predictive of subsequent second language (L2) development. Yet, little is understood about why these responses are associated with second language acquisition (SLA). The current study investigated this question by exploring the cognitive processes underlying learner responses. Learners of Japanese (n,= 24) engaged in task-based interactions during which they received recasts of their errors. Each learner then watched video clips of the recast episodes and commented on them. The learners' stimulated recall reports were analyzed in relation to their responses to the recasts: uptake, repair, and modified output. In recast episodes where they produced uptake, their reports indicated that they perceived the recasts as corrective feedback significantly more frequently compared to cases where they did not produce uptake. In episodes where learners correctly repaired their errors, they were significantly more likely to report not only recognizing corrective recasts but also noticing the interlanguage,L2 mismatch. Modified output was also significantly related both to learners' recognition of corrective recasts and to their noticing of the gap (Schmidt & Frota, 1986). Given the developmental benefits commonly associated with noticing the gap, these findings may partly explain why repair and modified output have been found to be predictive of SLA. [source] The Relationship between Empathy and Estimates of Observed PainPAIN MEDICINE, Issue 2 2009A. D. Green MSc ABSTRACT Objective., Recent research suggests that higher scores on measures of empathy correlate with a stronger response to observed pain, as well as higher estimates of pain intensity. Little work to date has examined the impact of empathy on evaluations of different levels of expressed pain, or how empathy may alter the accuracy of interpreting these painful facial expressions. This study examines the role of empathy in rating the intensity of facial expressions of pain, and the accuracy of these ratings relative to self-reported pain. The potential mediating role of available pain cues or the moderating role of gender on this relationship are also examined. Methods., Undergraduate participants (observers, N = 130) were shown video clips of facial expressions of individuals from a cold presser pain task (senders), and then asked to estimate that pain experience. This estimate was compared with the video sender's actual pain ratings. Results., Higher empathy was associated with an overall increase in estimates of senders' pain, which was not mediated by video subject or participant gender or the duration of painful facial expressions. Further analyses revealed that high empathy was associated with greater accuracy in inferring pain on only one of three inferential accuracy indices. Conclusions., While observers with greater empathy may infer greater pain in senders, resulting in a smaller underestimation bias overall, they are not necessarily more accurate in estimating pain on any given stimuli. The importance of these potential differences in perceived pain for clinical assessment and interpersonal relationships are discussed. [source] Cancer Pain Education for Medical Students: The Development of a Short Course on CD-ROMPAIN MEDICINE, Issue 1 2002Paul A. Sloan MD Objective., The purpose of this study was to assess the educational value and acceptability of a short CD-ROM course on cancer pain management given to third-year medical students at the University of Kentucky. Methods., Thirty-six medical students were given a short-course CD-ROM on cancer pain assessment and management. The Cancer Pain CD-ROM included textual instruction as well as video clips and a 15-item interactive self-assessment examination on cancer pain management. Students were asked to evaluate the computerized course with an 18-item survey using a Likert scale (1 = strongly disagree; 5 = strongly agree). Results., Twenty-seven medical students completed the course, however, only 11 returned evaluations. In general, the medical students appreciated the CD-ROM material, with the exception of the video clips. Students agreed most strongly (mean ± standard deviation [SD]) that the educational material on the CD-ROM was presented clearly (3.9 ± 1.1), the CD-ROM format was easy to use (4.0 ± 0.8), the CD-ROM course improved knowledge of opioid use for cancer pain (4.0 ± 0.7), and the course improved understanding of opioid-related side effects (4.0 ± 0.7). The self-assessment examination on cancer pain was rated easy to use and felt to be helpful (4.0 ± 0.9) for students to identify cancer pain knowledge deficits. The authors estimate that 150 man-hours were needed to complete production of the CD-ROM without any specialized training in computer skills. Conclusions., A short-course computer format program was developed by the authors to teach the basics of cancer pain management to medical students. A minority of students evaluated the program and agreed the material was clearly presented, improved knowledge of opioid analgesia, and was easy to use. [source] Selection of lineup foils in operational contextsAPPLIED COGNITIVE PSYCHOLOGY, Issue 2 2008Stephen Darling It has been argued (Luus & Wells, 1991) that matching lineup foils to the description of the culprit, rather than the appearance of the suspect, brings benefits to witness performance on identification tasks, in particular by increasing the rate of correct identifications of the culprit. Recently, live identification procedures in the United Kingdom have been replaced by use of video. The reported research investigated whether use of description matching would improve lineup performance when implemented using this new video based system in an ecologically valid experiment. The effect of using moving rather than still video clips was also investigated. Participants witnessed a live staged incident, and attempted to identify the culprit later from police video lineups. Neither use of a description-matching strategy to select foils nor use of moving images produced a reliable improvement in performance for culprit present (CP) or culprit absent (CA) lineups. Copyright © 2007 John Wiley & Sons, Ltd. [source] The impact of cognitive styles on perceptual distributed multimedia qualityBRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY, Issue 4 2003Gheorghita Ghinea Multimedia technology has been widely used in web-based instruction, but previous studies have indicated that individual differences, especially cognitive styles, have significant effects on users' preferences with respect to presentation of multimedia content. However, such research has thus far neglected to examine the effect of cognitive styles on users' subjective perceptions of multimedia quality. This study aims to examine the relationships among users' cognitive styles, the multimedia Quality of Service (QoS) delivered by the underlying network, and Quality of Perception (QoP), which encompasses user levels of enjoyment and understanding of the informational content provided by multimedia material. Accordingly, 132 users took part in an experiment in which they were shown multimedia video clips presented with different values of two QoS parameters (frame rate and colour depth). Results show that, whilst the two QoS parameters do not impact user QoP, multimedia content and dynamism levels significantly influence the user understanding and enjoyment component of QoP. [source] 1 YouTube for Ultrasound EducationACADEMIC EMERGENCY MEDICINE, Issue 2008Michael Liao The internet has many free resources that can be leveraged for education. We wish to present the use of two popular and free websites to more effectively disseminate educational cases and videos within a residency program and alumni network. Traditionally, sharing video was limited by cost, equipment, and technical challenges. YouTube and similar video sharing websites are attractive in that they allow free, permanent, and widely compatible hosting of videos. Realizing this potential we began using YouTube to share interesting and important video clips of emergency ultrasound cases, thus reaching a broader audience within our residency than possible during conference or tape review sessions. YouTube, however, doesn't allow extensive text and descriptions. We initially used email to convey the case details, however, to better organize and consolidate our cases, we turned to popular free webpage hosting sites like officelive.com and blogger.com. We chose officelive.com for its simplicity, free domain registration, and online web design interface. By using YouTube's ability to embed video onto any website, we were able to present case and video together on one page. All this for free and with common and easy to use online tools. Please visit emugweb.com to see what we have done. We believe that continued and innovative usage of these free internet tools can make our job as educators easier and at the same time offer a more organized and accessible format to our students. [source] Endoscopic sphenopalatine artery ligation , when, why and how to do it.CLINICAL OTOLARYNGOLOGY, Issue 6 2005An on-line video tutorial Keypoints ,,Endoscopic ligation of the sphenopalatine artery (ESPAL) has recently become the treatment of choice for refractory epistaxis. This paper reviews the background, indications and potential complications of ESPAL. ,,The main focus of this article is an online video tutorial on the anatomy and surgical technique of ESPAL. Web links lead to video clips of operative steps and therefore this paper should be read in front of a computer with access to the internet. ,,To study the techniques the links detailed below should be followed. (For computers running realplayer software the .wmv extension in each of these links should be replaced with the .rm extension.) ,,Incision, http://www.nhsgg.org.uk/content/streams/Figure3.wmv ,,Flap elevation, http://www.nhsgg.org.uk/content/streams/Figure4.wmv ,,Pedicle location, http://www.nhsgg.org.uk/content/streams/Figure5.wmv ,,Clip application, http://www.nhsgg.org.uk/content/streams/Figure6.wmv [source] Insertion and management of percutaneous veno-venous bypass cannula for liver transplantation: a reference for transplant anesthesiologistsCLINICAL TRANSPLANTATION, Issue 5 2010Tetsuro Sakai Sakai T, Gligor S, Diulus J, McAffee R, Marsh JW, Planinsic RM. Insertion and management of percutaneous veno-venous bypass cannula for liver transplantation: a reference for transplant anesthesiologists. Clin Transplant 2009 DOI: 10.1111/j.1399-0012.2009.01145.x © 2009 John Wiley & Sons A/S. Abstract:, Surgical advances using the retrohepatic caval preservation technique in liver transplantation (LT) has significantly decreased the need for veno-venous bypass (VVB). However, VVB still remains a viable adjunct of LT. The venous return cannula has traditionally been inserted using a cut-down technique via the axillary vein, but this technique carries significant risks for lymphorrhea, infection, or nerve damage. Since 2001, our institution has routinely used VVB in adult LT surgery. Percutaneous insertion of an internal jugular venous return cannula is performed by the attending anesthesiologist. The aim of this report is to describe the method of insertion and management of a percutaneous veno-venous return cannula in the internal jugular vein during LT. In-depth detail as well as video clips will provide a reference for LT centers wishing to apply this method in their practice. [source] | ||||||||||||||||