Background: A training course on burn infection and care is one of the courses that medical students take during their internship. This training course has not yet been taught through e-learning in ...medical schools in Iran. Therefore, this study aimed to compare the effects of two methods: traditional lecturing and employing a vid-cast with interactive electronic content, on the knowledge of interns in a training course on burns. Methods: This quasi-experimental study with a pre-post non-equivalent group design was conducted among medical interns taking burn rotation training courses at the Motahari burn hospital, affiliated with the Iran University of Medical Sciences. The two groups were given a pre-test at the beginning of the course. One group was given in-person lectures, and the other was given the same content in the form of a vid-cast with interactive electronic files. At the end of the rotation course, a post-test was administered on the planned content, and scores of both groups were compared. Results: The pre-test mean scores in the lecture group before and after the training intervention were 8 and 14.2, respectively; this difference was significant (P<0.001). The difference between the pre-test and post-test mean scores in the vid-cast group was also significant (P<0.001).The mean of post-test scores in the lecture group was 14.92 and 17.24 in the e-learning group; this difference was also significant (P<0.001). Conclusion: Post-test scores in the e-learning group were higher with a significant statistical difference, suggesting that the e-learning outperformed their counterparts in the traditional lecture model. It is recommended that e-learning be used either as a supplementary or the main method of training in burn infection and care for interns.
El cultivo de uva Vitis labrusca L. cv. Isabella tiene larga tradición en el departamento del Valle del Cauca en Colombia, cuya producción se enfoca al consumo en fresco y agroindustrial. Sin ...embargo, los problemas fitosanitarios del cultivo son responsables de pérdidas por encima del 50% de la cosecha, incrementando los costos de producción, debido al uso indiscriminado de productos de síntesis química, afectando la inocuidad de la fruta, además de tener alto impacto en la salud humana, así como graves consecuencias a nivel ambiental. El objetivo del presente estudio fue identificar los principales problemas fitosanitarios y caracterizar las practicas asociadas a su control y manejo en los cultivos vitícolas. Para ello, se realizó un análisis cualitativo, utilizando una encuesta semiestructurada y un análisis de priorización de problemas a productores de uva Isabella en el municipio de Ginebra, en el departamento del Valle del Cauca. Se encontró un porcentaje de incidencia del 100% para Plasmopara viticola y 95% para Erysiphe necator, agentes causales de dos de las enfermedades más limitantes del cultivo en Colombia. Para los artrópodos plaga, el complejo de ácaros conformado por Polyphagotarsonemus latus y Tetranychus urticae presentó el mayor porcentaje de incidencia, con un 84% de los predios visitados. Los agricultores se enfocan principalmente en el control curativo, haciendo uso de insumos de síntesis química, por lo que a futuro se deben formular investigaciones con promoción al uso de prácticas de manejo con nuevos enfoques técnicos que sean no solo económicamente rentables, sino también social y ecológicamente sostenibles.
•A new video object detection framework with object enhanced to solve the object occlusion problem.•Combination of lightweight optical flow network and object detection network.•Background ...information masking method boosts object detection performance.•Performance of the proposed framework is evaluated on ImageNet VID dataset.
With image object detection techniques progressing, video object detection attracts a lot of attention more than ever before. However, the performance of detecting the object from a video suffers a lot as object occlusion can always lead to the object in the presence of appearance deterioration. To deal with this problem, the temporal correlation of video sequences is often used to reduce the effects of object occlusion in video object detection. In this paper, an optical-flow-feature fusion-based video object detection method is proposed with consideration of temporal coherence among video frames. To further reduce computational complexity, this paper also proposes a packet video processing method. Specifically, video frames are grouped first, and all frames in current group share the same optical flow feature map by feature fusion. Then the Target Image can be formed with object information enhanced by fusing the shared feature map with current frame. The proposed method gives rise to effective background information masking, so that the object detection network can focus more on the foreground object. This method effectively improves the object detection performance and the scene migration performance. Experimental results prove that the proposed method significantly improves the detection accuracy to 78.6% on ImageNet VID. In addition, VGG and ResNet are compared to further verify the effectiveness of the proposed method, and the results can be a persuasive evidence with the highest detection accuracy and acceptable time consumption.
An anonymous musician plays Pachelbel's Canon on the electric guitar in a clip that has been viewed over sixty million times. The Dramatic Gopher is viewed over sixteen million times, as is a ...severely inebriated David Hasselhoff attempting to eat a hamburger. Over 800 variations, parodies, and parodies-of-parodies are uploaded of Beyonce Knowles' Single Ladies dance. Tay Zonday sings Chocolate Rain in a video viewed almost forty million times and scores himself a record deal. Obama Girl enters the political arena with contributions such as I Got a Crush on Obama and gets coverage in mainstream news networks.
In Watching YouTube , Michael Strangelove provides a broad overview of the world of amateur online videos and the people who make them. Dr. Strangelove, the Governor General Literary Award-nominated author that Wired Magazine called a 'guru of Internet advertising,' describes how online digital video is both similar to and different from traditional home-movie-making and argues that we are moving into a post-television era characterized by mass participation.
Strangelove draws from television, film, cultural, and media studies to help define an entirely new field of research. Online practices of representation, confessional video diaries, gendered uses of amateur video, and debates over elections, religion, and armed conflicts make up the bulk of this groundbreaking study, which is supplemented by an online blog at strangelove.com/blog. An innovative and timely study, Watching YouTube raises questions about the future of cultural memory, identity, politics, warfare, and family life when everyday representational practices are altered by four billion cameras in the hands of ordinary people.
Abstract
Background
frailty shows an upward trajectory with age, and higher levels increase the risk of mortality. However, it is less known whether the shape of frailty trajectories differs by age ...at death or whether the rate of change in frailty is associated with mortality.
Objectives
to assess population frailty trajectories by age at death and to analyse whether the current level of the frailty index (FI) i.e. the most recent measurement or the person-specific rate of change is more predictive of mortality.
Methods
3,689 individuals from three population-based cohorts with up to 15 repeated measurements of the Rockwood frailty index were analysed. The FI trajectories were assessed by stratifying the sample into four age-at-death groups: <70, 70–80, 80–90 and >90 years. Generalised survival models were used in the survival analysis.
Results
the FI trajectories by age at death showed that those who died at <70 years had a steadily increasing trajectory throughout the 40 years before death, whereas those who died at the oldest ages only accrued deficits from age ~75 onwards. Higher level of FI was independently associated with increased risk of mortality (hazard ratio 1.68, 95% confidence interval 1.47–1.91), whereas the rate of change was no longer significant after accounting for the current FI level. The effect of the FI level did not weaken with time elapsed since the last measurement.
Conclusions
Frailty trajectories differ as a function of age-at-death category. The current level of FI is a stronger marker for risk stratification than the rate of change.
Metabolically healthy obesity may be a transient phenotype, but studies with long follow-up, especially covering late-life, are lacking. We describe conversions between cross-categories of body mass ...index (BMI) and metabolic health in 786 Swedish twins with up to 27 years of follow-up, from midlife to late-life.
Metabolic health was defined as the absence of metabolic syndrome (MetS). We first visualized conversions between BMI-metabolic health phenotypes in 100 individuals with measurements available at ages 50-64, 65-79, and ≥80. Next, we modeled conversion in metabolic health status by BMI category in the full sample using Cox proportional hazards regression.
The proportion of individuals with MetS and with overweight or obesity increased with age. However, one-fifth maintained a metabolically healthy overweight or obesity across all three age categories. Among those metabolically healthy at baseline, 59% converted to MetS during follow-up. Conversions occurred 56% more often among individuals with metabolically healthy obesity, but not overweight, compared to normal weight. Among those with MetS at baseline, 60% regained metabolic health during follow-up, with no difference between BMI categories.
Conversions between metabolically healthy and unhealthy status occurred in both directions in all BMI categories. While conversions to MetS were more common among individuals with obesity, many individuals maintained or regained metabolic health during follow-up.
La educación durante los últimos años viene haciendo un llamado a la transformación constante debido, tanto al desarrollo de la tecnología, como al reciente evento mundial de la pandemia del ...COVID-19. El objetivo de este artículo reflexivo se centra en el reconocimiento de lo que generó la educación confinada y las posibilidades del uso de algunos dispositivos tecnológicos y herramientas digitales que se pudieron adoptar y adaptar a las diversas situaciones, saberes y contextos de las comunidades educativas. De otro lado, busca comprender el reclamo a algunas instituciones educativas rurales y urbanas para la transformación de la educación acordes a los retos y desafíos del siglo XXI. Con una metodología de corte cualitativo y el uso de la técnica de análisis documental, se utilizaron para la recolección y organización de la información instrumentos como matrices, fichas de análisis de categorías y fichas de análisis bibliográfico, lo cual permitió agrupar y clasificar la información para su posterior interpretación y producción reflexiva. Como conclusión principal se resalta la importancia para todos los actores educativos, de adquirir la conciencia contextualizada, en cuanto a la serie de cambios que se vienen presentando en los últimos años en el sistema educativo.
Body mass index (BMI) is associated with cognitive abilities, but the nature of the relationship remains largely unexplored. We aimed to investigate the bidirectional relationship from midlife ...through late-life, while considering sex differences and genetic predisposition to higher BMI. We used data from 23,892 individuals of European ancestry from the Health and Retirement Study, with longitudinal data on BMI and three established cognitive indices: mental status, episodic memory, and their sum, called total cognition. To investigate the dynamic relationship between BMI and cognitive abilities, we applied dual change score models of change from age 50 through 89, with a breakpoint at age 65 or 70. Models were further stratified by sex and genetic predisposition to higher BMI using tertiles of a polygenic score for BMI (PGS
). We demonstrated bidirectional effects between BMI and all three cognitive indices, with higher BMI contributing to steeper decline in cognitive abilities in both midlife and late-life, and higher cognitive abilities contributing to less decline in BMI in late-life. The effects of BMI on change in cognitive abilities were more evident in men compared to women, and among those in the lowest tertile of the PGS
compared to those in the highest tertile, while the effects of cognition on BMI were similar across groups. In conclusion, these findings highlight a reciprocal relationship between BMI and cognitive abilities, indicating that the negative effects of a higher BMI persist from midlife through late-life, and that weight-loss in late-life may be driven by cognitive decline.
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