Adequate Video Research Articles

The Injury Mechanism of Achilles Tendon Rupture in Professional Athletes: A Video Analysis Study.

In professional athletes, Achilles tendon ruptures are devastating injuries, often resulting in season loss or decreased return to sports level. We aimed to perform a comprehensive video analysis to describe the mechanisms of Achilles tendon rupture as well as body posture in professional athletes. We hypothesized that Achilles tendon ruptures in professional athletes develop with a specific injury mechanism and that body posture at the time of injury varies by sport. Of 114 identified Achilles tendon ruptures that occurred in professional athletes between 1970 and 2020, 42 with adequate video data were analyzed for injury mechanism, body posture, and player and sport characteristics by three independent reviewers. Mean ± SD age of the 42 athletes (41 men and 1 woman) was 28.4 ± 4.26 years. Eighteen athletes played basketball (42.9%), 14 football (33.3%), five soccer (11.9%), three baseball (7.1%), and two rugby (4.8%). Thirty-five patients (83.3%) had noncontact injuries. The most frequent months of injury were January (16.7%) and October (14.3%). During Achilles tendon rupture, the ankle was in dorsiflexion, the body was bent forward, the knee and hip were in extension, and the foot was in a neutral position. Most injuries occurred during take-off/acceleration (40.5%) or stop and turn (38.5%) maneuvers. In professional athletes, the Achilles tendon most often ruptures during take-off/acceleration. The most common position during rupture is the trunk in flexion, the knee and hip in extension, and the ankle in dorsiflexion. This information can guide professional athletes in terms of physical therapy techniques, including neuromuscular training, proprioception, and balance training specific to preventing Achilles tendon rupture.

Are patients satisfied with online video consultations for assessing their hand disorder?

ObjectivesThe aim was to evaluate patient satisfaction with online video consultations in assessing hand disorder. Material and methodsThis prospective study included patients who attended a video consultation, either as an initial meeting to assess the need for further evaluation or treatment or as an early postoperative follow-up consultation. After the consultation, they completed a satisfaction questionnaire. Regression models were used to reveal determinants of patient satisfaction. ResultsWe included 100 patients, with a mean age of 55 years (range 17–81 years). 95% were satisfied or very satisfied. The main reasons for choosing this form of consultation were shorter travel and wait times. Age, gender and educational level did not determine satisfaction. Significant factors for dissatisfaction were insufficient video and sound quality. ConclusionOnline video consultation in hand surgery is a valuable alternative to in-clinic appointments for all age groups. However, it is crucial to ensure adequate video and audio quality.

Injury mechanism of patellar dislocation in professional athletes: a video analysis study

Objective: Patellar dislocation (PD) is a devastating injury in professional athletes. An important aspect of injury prevention requires not only identifying the risk factors but also determining the responsible injury mechanism. Therefore, this study aimed to evaluate the injury mechanisms by examining the videos of PD injuries that occurred in professional athletes. Material and Methods: Injury videos of identified athletes and/or sports competitions where the injury occurred were detected on social media platforms (YouTube®, Twitter®, Facebook®). On January 1, 2021, 32 patella dislocation videos were found. A total of 28 PD that occurred in professional athletes between 1999 and 2020 were identified. Of these, 18 PD injuries with adequate video data were analyzed for injury mechanism, body posture, and player and sports characteristics. Three independent reviewers evaluated the videos. Results: There were 17 (94.4%) male and 1 (5.6%) female athletes. The mean age was 26.2±3.1 years. Distribution of athletic branches were such: four basketball (22.2%), two football (11.1%), nine rugby (50.0%), two soccer (11.1%), and one boxing (5.6%). In 13 cases (72.2%), the injury occurred by contact mechanism. Eight of these injuries (61.5%) occurred as a result of direct contact. The most important findings of this study were that patellar dislocation occurred when the trunk, hip, knee and ankle were slightly flexed. Dislocation occurred with the contraction of the quadriceps while the foot and tibia were performing external rotation. Conclusion: In professional athletes, PD most frequently occurs during a collision. The most common posture of the athlete who lost his balance is the trunk in flexion, knee and hip in flexion, ankle in plantar flexion.

The Injury Mechanism of Knee Extensor Mechanism Rupture in Professional Athletes: A Video Analysis Study.

In Professional Athletes, quadriceps and patellar tendon ruptures are devastating injuries, often resulting in the loss of a season or a decreased return to the pre-injury level of sport. This study aimed to perform a comprehensive Video Analysis on extensor mechanism rupture (EMR) to describe the body postures and related mechanism in Professional Athletes. Using publicly available data on quadriceps tendon and patellar tendon ruptures from between 2000 and 2020, 52 elite athletes were identified. Of these, twenty-eight injuries with adequate video data were analyzed for Injury Mechanism, body posture, as well as player and sports characteristics. Of the 27 athletes included in the study, with an average age of 28.18 ± 4.96years, there were injuries in 28 extremities (1 case bilateral). The patellar tendon was ruptured in 20 cases (71.4%), and the quadriceps tendon in 8 cases (28.6%). There was total tendon rupture in 13 cases, and partial rupture in 6 cases (data for 1 case was not available). In 20 cases (70.4%), there was no contact resulting in the injury. Four of the contact injuries occurred in American football (3 direct, one indirect), 3 in basketball (1 direct, two indirect), and 1 in baseball (direct). The results of this research indicate that EMR occurs most commonly when the knee is in flexion and the ankle is in plantar flexion. There is the tendency for the knee to be in valgus at the time of injury. This information can guide physical therapy techniques, including neuromuscular training, proprioception, and balance training in the prevention of EMR in elite athletes.

Perceive, Recall, Plan and Perform (PRPP)-Assessment Based on Parent-Provided Videos of Children with Mitochondrial Disorder: Action Design Research on Implementation Challenges

Aims Performing the Perceive, Recall, Plan and Perform (PRPP)-Assessment, using video material of everyday life, seems sensible to lower the patient burden, enhance ecological validity, and provide care at a distance. However, receipt of adequate video material is not self-evident and assessing videos can be challenging. Therefore, this study aims to optimize the process of gaining video material and to optimize the PRPP-Assessment based on parent-provided videos. Methods An action design research method was used, focusing on implementation of the PRPP-Assessment based on parent-provided videos within the care of children with a mitochondrial disorder or similar symptoms. Results Five cycles were conducted. To receive input, the cycles used videos of nine children performing activities, written feedback, and semi-structured interviews and focus groups comprising parents (n = 13), a teacher (n = 1), occupational therapists (n = 16), and other professionals (n = 2) . This led to successful implementation of the PRPP-Assessment. General lessons were learned on (1) instructing parents; (2) handling video material; (3) PRPP-Assessment based on parent-provided videos; and (4) PRPP-Assessment of children (with limited functional abilities). Conclusions Lessons learned should be implemented in practice and are incorporated into a manual to guide the implementation of video-based observations with PRPP-Assessment in practice.

Implementation of Simultaneous Multi-Streaming of Live Solar Eclipse Video via 5.8 GHz AirMax

For the 2017 solar eclipse ballooning, we have developed a video payload that can simultaneously live-stream multiple videos via a single 5.8 GHz wireless link through a Ubiquiti Rocket M5 modem. In this paper, we describe our approach to multiplex multiple video streams into a single data stream that a 5.8 GHz wireless modem can transport to the ground station. Various key factors are described to properly configure the Raspberry Pis and optimize the transmission from an M5 modem on the video payload over the 5.8 GHz link while ensuring adequate range and acceptable video quality received at the ground station. A screenshot of the multi-video streaming is provided as an example to justify a successful operation of our video payload.

End-to-end SARS-CoV-2 transmission risks in sport: Current evidence and practical recommendations


 
 
 
 The coronavirus disease 2019 (COVID-19) pandemic has caused disruption to professional and recreational sports across the world. The SARS-CoV-2 virus can be transmitted by relatively large respiratory droplets that behave ballistically, and exhaled aerosol droplets, which potentially pose a greater risk. This review provides a summary of end-to-end SARS-CoV-2 transmission risk factors for sport and an overview of transmission mechanisms to be considered by all stakeholders. The risk of SARS-CoV-2 transmission is greatest indoors, and primarily influenced by the ventilation of the environment and the close proximity of individuals. The SARS-CoV-2 transmission risks outdoors, e.g. via water, and from fomites, appear less than initially thought. Mitigation strategies include good end-to-end scenario planning of activities to optimise physical distancing, face mask wearing and hygiene practice of individuals, the environment and equipment. The identification and removal of infectious individuals should be undertaken by means of the taking of temperature and COVID-19 symptom screening, and the use of diagnostic monitoring tests to identify asymptomatic individuals. Using adequate video footage, data from proximity technology and subject interviews, the identification and isolation of ‘close contacts’ should also be undertaken to limit SARS-CoV-2 transmission within sporting environments and into the wider community. Sports should aim to undertake activities outdoors where possible, given the lower SARS-CoV-2 transmission risk, in comparison to indoor environments.
 
 
 

Transformation of Pedagogical Communicative Competence during Creation Digital Online Courses

The purpose of this work is to identify the transformations of communicative functions. These functions are associated with the subjects of communication in both fields: in pedagogical and organizational, also in the instrumental and design once during the process of creating digital video recordings for online courses. Questionnaires, observation, and factor analysis were used as research methods. It helped to formulate a popularity rating of digital tools for future teachers. The study was conducted at the Institute of Psychology and Education of Kazan (Volga region) Federal University. The study involved 120 people: teachers developing online courses and students studying at the pedagogical educational programs. Transforming indicators of pedagogical communicative competence are highlighted. These indicators are needed to be emphasized when improving teacher training. It will help future teachers to be able to effectively carry out their activities in digital educational environment. These indicators are: the ability to organize interactive cooperation during training, the ability to organize mutual exchange and development of students, the ability to create an open environment for analysis and improvement. The methodological aspects of the development of pedagogical communication functions in the dynamic environment of digital education and an interactive environment are disclosed on the basis of work with videos. Some recommendations for future teachers’ skills improving and development of training experience organization in the digital environment are given. These are a clearly-set-goal for educational video materials, adequate video content, skills for digital tools using, also the skill to choose adequate digital tools for a task fulfillment. The tool that can enhance enthusiasm, and stimulate students for productive work in a digital environment. The study allows improving video content and increasing the effectiveness of its use in the educational process. Also, the results of the experiment can become a basis for teacher training programs improving. Especially it can be useful for future teachers’ pedagogical communicative and digital competences development. The tasks developed within the frame of the research will be included in the assignments of pedagogical internship for pedagogical Master’s degree courses at the Institute of Psychology and Education of Kazan Federal University. These tasks for students include development and use of online courses with video materials.

Contrast-Enhanced Ultrasound Quantification Assessment of Focal Fatty Variations in Liver Parenchyma: Challenging the Traditional Qualitative Paradigm of Uniform Enhancement With Adjacent Parenchyma.

The purpose of this study was to quantify contrast-enhanced ultrasound enhancement of focal fatty sparing (FFS) and focal fatty infiltration (FFI) and compare it with adjacent liver parenchyma. This was a retrospective observational study yielding 42 cases in the last 4 years. Inclusion criteria were a focal liver lesion, adequate video availability, and an established diagnosis of FFS or FFI based on clinical or imaging follow-up or a second modality. Contrast-enhanced ultrasound examinations were performed with a standard low-mechanical index technique. Commercially available software calculated quantitative parameters for a focal liver lesion and a reference area of liver parenchyma, producing relative indices. In total, 42 patients were analyzed (19 male) with a median age of 18 (interquartile range, 42) years and a median lesion diameter of 30 (interquartile range, 16) mm. The cohort included 26 with FFS and 16 with FFI. Subjectively assessed, 27% of FFS and 25% of FFI were hypoenhancing in the arterial phase, and 73% of FFS and 75% of FFI were isoenhancing. In the venous and delayed phases, all lesions were isoenhancing. The peak enhancement (P = .001), wash-in area under the curve (P < .01), wash-in rate (P = .023), and wash-in perfusion index (P = .001) were significantly lower in FFS compared with adjacent parenchyma but not the mean transit time. In the FFI subgroup, no significant difference was detected. Comparing relative parameters, only the wash-in rate was significantly (P = .049) lower in FFS than FFI. The mean follow-up was 2.8 years. Focal fatty sparing shows significantly lower and slower enhancement than the liver parenchyma, whereas FFI enhances identically. Focal fatty sparing had a significantly slower enhancement than FFI.

Video Enhancement Techniques Employed Over the Decade for Reliable Communication

Traditional networks are designed to meet the needs of streaming video on the Internet. Relatively high standards of broadband connections and video broadband services make the best effort for certain specific video information and transmission methods to appear at any time to reduce network constraints. Video quality is directly related to the basic ability of the phone to send and receive data from time to time for playback. Record videos from your mobile phone are facing various challenges that have been overcome by a variety of methods. In an extremely robust and unpredictable environment, transversal hardware provides adequate video. Conventional networks are designed to meet the needs of streaming video over the Internet. Relatively high standards of broadband connections and video broadband services make the best effort for certain specific video information and transmission methods to appear at any time to reduce network constraints. Video quality is directly related to the basic ability of the phone to send and receive data from time to time for playback. Record videos from your mobile phone are facing various challenges that have been overcome by a variety of methods. In an extremely robust and unpredictable environment, transversal hardware provides adequate video.

A video hard cut detection using multifractal features

Efficient management of video sequences is based on adequate video content description. This description can be used for various purposes in different applications, telecommunication services, video and multimedia systems. Video hard cut detection represents the foundation of temporal video segmentation. In this paper, a new video hard cut detection methodology is proposed using multifractal features. Transition between two shots can be described as color and texture differences within a decoded video sequence. In the proposed methodology we formed specific structures by measuring color differences between frames. The formed structures are used for hard cut candidate detection. This is followed by multifractal representation of texture changes by Holder exponents. The proposed methodology achieves high performance using more than 750,000 frames, extracted from forty different video sequences, classified by four well known genre groups. Moreover, the proposed hard cut detection achieves high performance regardless of high level video production or complex non-linear editing for different genre groups. This is confirmed by comparison between the proposed methodology and other recent work on hard cut detection.

Virtual Reality-Wireless Local Area Network: Wireless Connection-Oriented Virtual Reality Architecture for Next-Generation Virtual Reality Devices

In order to enhance the user experience of virtual reality (VR) devices, multi-user VR environments and wireless connections should be considered for next-generation VR devices. Wireless local area network (WLAN)-based wireless communication devices are popular consumer devices with high throughput and low cost using unlicensed bands. However, the use of WLANs may cause delays in packet transmission, owing to their distributed nature while accessing the channel. In this paper, we carefully examine the feasibility of wireless VR over WLANs, and we propose an efficient wireless multiuser VR communication architecture, as well as a communication scheme for VR. Because the proposed architecture in this paper utilizes multiple WLAN standards, based on the characteristics of each set of VR traffic, the proposed scheme enables the efficient delivery of massive uplink data generated by multiple VR devices, and provides an adequate video frame rate and control frame rate for high-quality VR services. We perform extensive simulations to corroborate the outstanding performance of the proposed scheme.

Student use of flipped classroom videos in a therapeutics course

PurposeTo evaluate the extent of student use of flipped classroom videos. MethodsThis 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. ResultsThere 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 < 0.001]. The mean score on the exam was 84 ± 8 points (out of 100). There was a significant association between video view time (per 50% increment) and score on the exam (coefficient 2.52; 95% CI: 0.79–4.26; p = 0.005; model R2 = 7.8%). ConclusionStudent preparation prior to the flipped classroom is low and decreases with time. Preparation is higher when there is a quiz required.

Multicast Resource Allocation Enhanced by Channel State Feedbacks for Multiple Scalable Video Coding Streams in LTE Networks

The growing demand for mobile multicast services, such as Internet Protocol television (IPTV) and video streaming, requires effective radio resource management (RRM) to handle traffic with strict quality-of-service constraints over Long-Term Evolution (LTE) and beyond systems. Special care is needed to limit system performance degradation when multiple multicast streams are simultaneously transmitted. To this aim, this paper proposes an RRM policy based on a subgrouping technique for the delivery of scalable multicast video flows in a cell. Our proposal enhances the legacy multicast transmission over LTE systems by exploiting multiuser diversity and the users' channel quality feedbacks. Moreover, it is designed to take advantage of the frequency selectivity in the subgroup formation. Simulation results demonstrate the effectiveness of the proposed scheme, which outperforms existing approaches from the literature. It succeeds in achieving higher spectral efficiency and guaranteeing adequate video quality to all multicast receivers and improved quality to those with good channel conditions.

Ultrasound Video Streaming using HEVC-XLD in WiMAX Networks

Medical video communication system has been adopted widely in standard clinical practise to provide an adequate quality video diagnostic. In the existing m-health application, significant advance methods has been produced to emerge the high efficiency video compression methods with a promising wireless network for emergency situation in daily clinical practice. To transmit the medical ultrasound video effectively from user side to expert side, this proposed work utilize the upcoming standard technique High efficiency video coding (HEVC) for video compression. HEVC provides equal perceptual video quality by 50% bit-rate reduction range with high-resolution and low-delay video transmission. The cross layer framework over the WiMAX network is adapted to improve the throughput of the network considerably and the quality of service is optimized in the network environments. The experimental evaluations of the proposed scheme indicate that it produce a higher PSNR rate per frame and the best high resolution ultrasound video quality.

McGrath MAC Video Laryngoscope Does Not Provide Adequate Direct Views of the Airway

Video laryngoscopes improve glottic view and first-attempt intubation success compared with direct laryngoscopes. Curved blade designs help “see around corners” and can obtain adequate video views of the glottic inlet even in difficult airways. Concerns about sudden equipment failure and maintenance of direct laryngoscopic skills call into question whether indirect (video) laryngoscopy should be used exclusively. Traditionally shaped video laryngoscopes can be used …

버퍼 기반 에너지 통신모드 기회적 제어를 통한 동적 적응 비디오 스트리밍

These days, streaming users are using ABR (Adaptive Bitrate) technique services by requesting the most adequate video rate selectively based on their own channel states. Most ABR related video rate adaptation techniques are only focused on real-time bitrate adaptations based on their own channel state, and misses energy limited characteristics that come from a mobile device's battery dependence. In other words, the mobile device's important characteristics and accompanying energy consumption are not being considered and causes dissatisfaction over streaming services. In this paper, we propose energy efficient prefetching based dynamic adaptive video streaming techniques, which saves unnecessary consumed energy while providing video rates of the same performance. Our scheme continuously turns off energy modules with enough streaming in the buffer and turns on in case of the opposite situation to save energy. Through the performance evaluation, this study's proposed scheme is 60% better than the previous work at global average mobile download speed.

Infraslow EEG Changes in Infantile Spasms

Infantile spasms (IS) are a devastating epileptic encephalopathy syndrome of infancy. Analysis of infraslow EEG activity (ISA) has shown potential in the presurgical evaluation of patients with epilepsy and in differentiating between focal and generalized epilepsy syndromes. Infraslow EEG activity analysis may provide insights into the pathophysiology of some difficult-to-treat epilepsy syndromes, such as IS. To our knowledge, there are no published reports describing ISA in patients with IS. The purpose of this study was to describe ictal patterns of ISA in patients with IS and to correlate with clinical data. EEG recordings of all cases of IS in the past 10 years at the Alberta Children's Hospital were reviewed. Inclusion criteria were a technically adequate video EEG recording that captured at least one spasm. For each patient, the first 10 confirmed spasms were examined. Spasms were evaluated for changes in ISA, which were either generalized, lateralized, or absent ISA (g-ISA, l-ISA, or n-ISA, respectively). Results were correlated with treatments, clinical course, and information pertinent to likely etiology of the IS. A total of 77% of spasms were associated with ISA; 57% with g-ISA, 20% l-ISA, and 21% n-ISA. All patients with exclusively g-ISA showed at least a partial response to initial therapy, while this was the case in 66.7% of those with at least some l-ISA and 50% of those with exclusively n-ISA. Other seizure types occurred in 60% of patients with exclusively g-ISA versus 83% with some l-ISA and all patients with exclusively n-ISA. Ictal ISA was observed in the majority of IS. Trends were observed suggesting that the presence of exclusive g-ISA changes may be a positive prognostic factor in IS.

Video Content in Web Surveys: Effects on Selection Bias and Validity

One of the benefits of web-based research is the capacity to deliver video content directly to individual survey participants. However, yet to be investigated is whether the participant demographic and attitudinal characteristics are distorted when respondents are asked to view and respond to videos on their personal computers. To address this question, this research paper focuses on two potential types of selection bias introduced into web-based studies with video content: (1) that resulting from respondents� differential ability to view videos; and (2) that resulting from demographic and motivational influences of adequate exposure to video content. Through a secondary analysis of two studies focusing on adult cigarette smokers living in the United States, this research paper investigates whether the ability to view videos differs between demographic groups, whether respondents who do not view videos for their full duration differ from those who view videos for an appropriate amount of time, and whether video characteristics influenced this relationship. Results show that age, education, sex, household internet access, and work status influence the likelihood of a respondent reporting an inability to view videos. In addition, age, employment status, and congeniality of and interest in issue topic affect adequate video viewing times. These outcomes suggest that although web-based studies offer many advantages, the inclusion of videos within these surveys has the potential to undermine the accuracy of study findings and distort the representative nature of the study sample. Recommendations for minimizing potential distortions are presented

Video analysis and the temporality of inscriptions within social interaction: the case of architects at work

This article shows how artefacts – and more specifically documents and visualizations such as images, maps and plans – can be analysed in detail within an ethnomethodological and conversation analytic perspective focusing on the way in which they are manipulated within social activities. The aim is double. On the one hand, the article deals with the way in which the temporal and interactional feature of inscriptions in interaction can be preserved and analysed on the basis of video data, highlighting some of the challenges of producing adequate video recordings and video transcriptions of these phenomena. On the other hand, the article offers an empirical study of a professional activity in which participants manipulate texts, plans and other visualizations. Thus, it analyses in detail a meeting video recorded in an architectural office, in which three architects read, discuss, and draw plans, as well as explore and discover ideas by formulating, gesticulating, and sketching them.