An Effective Method to Determine the Distribution Boundary of Cobalt-Rich Fe-Mn Crusts on a Guyot: Synchronous Application of Sub-bottom Profiling and Deep-Sea Video Recording

Determining the upper boundary of the cobalt-rich crust distribution of a guyot is important for estimating the mineral resources available, however, it has also long been an unsolved question. Correlations between the sub-bottom structures, revealed by sub-bottom profiling, and crust distribution can be revealed for the first time by the synchronous application of sub-bottom profiling and deep-sea video recording. The lower boundary of the sediment corresponds with the upper boundary of the crust. By analysis of these two kinds of data, the lower boundary of the sediment can be determined; therefore, the upper boundary of the crust distribution can be deduced. According to this method of analysis, the upper boundary of water depth of crust distribution of a seamount in the western Pacific is about 1 560 m.

Recording the direct surgeon’s view with an operating microscopic view improves microscopic ophthalmic surgery training

AIM:To establish a recording system with a direct view of the surgeon to supplement video recording under an operating microscope,which lacks information on the movement and position of the surgeon’s hands,and to facilitate the reproduction of a skilled surgeon’s technique by a surgeon in training.METHODS:A small camera was attached to the operating microscope with a custom adapter.Microscopic surgeon’s view and direct surgeon’s view through this new camera were recorded in the surgical recording system.Both movies were synchronized and analyzed how do surgeons handle the instruments.RESULTS:A small camera attached to the operating microscope allowed the surgeon’s hands motion to be recorded without interfering with the surgeon’s movements.Different surgeons used different methods to manipulate the ultrasound handpiece and the irrigation/aspiration device.Even in the simple paracentesis procedure,different surgeons used different methods.Surgeons-in-training were able to identify and improve their weaknesses by watching synchronized movies of their hand motions and microscopic view.CONCLUSION:Simultaneous recording the surgical field out of the operating microscopic view by a small camera set on the microscope is comprehensive and improves surgeons-in-training understanding and learning surgeries.

Patient interest in video recording of colonoscopy:A survey

AIM:To find if patients are interested in obtaining a video recording of their colonoscopy procedure.METHODS:We conducted a survey of outpatients presenting for colonoscopy regarding their interest in obtaining a video recording of their colonoscopy.RESULTS:Two hundred and forty-eight patients(mean age 57.9 years;57% male) were surveyed.Two hundred and one patients(81%) were interested in obtaining a video recording.No significant predictors of patients' interest in the video recording were identified.After reading a brief educational paragraph explaining missed lesions during colonoscopy,135 patients(54%) were more interested in having a video recording,and none were less interested.One hundred and fifty-six patients(63%) were willing to pay for a video recording.In multivariable analyses,younger age was predictive of willingness to pay for a video recording.Prior history of colorectal cancer and a family history of colorectal cancer were predictive of willingness to pay a greater amount.CONCLUSION:Patients undergoing colonoscopy expressed substantial interest in obtaining a videorecording of their procedure.Awareness of missing lesions during colonoscopy increased interest in having a videorecording.

Video recording of neonatal resuscitation:A feasibility study to inform widespread adoption

AIM To determine the feasibility of introducing video recording(VR) of neonatal resuscitation(NR) in a perinatal centre.METHODS This was a prospective cohort quality improvement study on preterm infants and their caregivers.Based on evidence and experience of other centers using VR intervention,a contextually relevant implementation and evaluation strategy was designed in the planning phase.The components of intervention were pre-resuscitation team huddle,VR of NR and video debriefing(VD),all occurringon the same day.Various domains of feasibility and sustainability as well as feasibility criteria were predefined.Data for analysis was collected using quantitative and qualitative methods.RESULTS Seventy-one caregivers participated in VD of 14 NRs facilitated by six trained instructors.Ninety-one percent of caregivers perceived enhanced learning and patient safety and,48 issues were identified related to policy,caregiver roles,and latent safety threats.Ninety percent of caregivers expressed their willingness to participate in VD activity and supported the idea of integrating it into a resuscitation team routine.Eighty-three percent and 50% of instructors expressed satisfaction with video review software and quality of audio VR.No issues about maintenance of infant or caregivers' confidentiality and erasure of videos were reported.Criteria for feasibility were met(refusal rate of < 10%,VR performed on > 50% of occasions,and < 20% caregivers' perceiving a negative impact on team performance).Necessary adaptations to enhance sustainability were identified.CONCLUSION VR of NR as a standard of care quality assurance activity to enhance caregivers' learning and create opportunities that improve patient safety is feasible.Despite its complexity with inherent challenges in implementation,the intervention was acceptable,implementable,and potentially sustainable with adaptations.

临床医学八年制神经病学理论课程线上教学效果分析

选择北京协和医学院八年制临床医学生为研究对象。线上教学的实施包括基于录播视频自学和线上互动答疑。综合分析学生的考核成绩差异,评价神经病学理论课程线上教学的效果。

模糊、缺席、不可见:影响数字化机器人智能服务的三个关键原因

机器人服务是数字化智能服务转型的一个重要体现。以往的研究理论化和技术化地分析了自动化机器人技术在提高服务效率、提升顾客体验方面的积极影响,但很少有研究者从顾客的实际使用视角去检验这一假设,更鲜有研究者在全自动化机器人服务的环境中检验智能化人机互动的实际效果和可能存在的问题。为此,本文选择视频录制与分析的研究视角,并结合民族志的研究方法,在两家数字化无人智慧酒店中记录了495次顾客与自动化智能服务系统互动的实践,旨在从实证的互动角度发现全自动化智能机器服务场景下存在的问题,揭示智能机器系统对服务活动产生负面影响的三个因素:互动指令的模糊性、服务协助人员的缺席、机器人交互技术的“不可见性”。为了提高数字化机器人智能服务效率,未来应考虑开发用户友好型服务交互系统。

特征融合下田径录像3D人体动作DTW捕捉算法

由于不同运动员的动作风格和速度不同,导致田径录像中记录的不同运动员的人体动作序列在时间长度上存在差异,从而产生不同长度序列之间的不对齐问题。为此,提出特征融合下田径录像三维(3D)人体动作动态时间规整(DTW)捕捉算法。将田径录像中提取的人体动作数据转换为3D坐标序列,表示人体各部位的位置和动作,获取人体动作的深度图序列,利用梯度局部各向异性系数(GLAC)和稀疏时间梯度自相关(STACOG)分析深度图局部区域的梯度特性以及时间自相关性。利用Canny算子提取每帧深度图的边缘轮廓,结合小波变换和k-means聚类分析人体轮廓的动态变化特征。通过Kinect设备获取人体骨骼点的3D坐标信息,采用主成分分析(PCA)方法将3D空间坐标、关节角度等多个特征融合到一个特征空间中,通过补帧和删帧操作进行预处理,选择最重要的主成分构建新的低维特征空间。利用DTW计算视频序列的相似性,从而捕捉田径录像中不同长度序列的3D人体动作。实验结果表明,该算法捕捉田径录像3D人体动作的准确程度高达99.07%,面对复杂程度较高的动作时,该算法捕捉到的人体动作与实际动作的相似度始终保持在97%以上。此外,所提算法提取到的人体动作轮廓特征线条流畅、连续,且与实际动作高度一致。

关于铁路综合视频监控系统存储服务的研究

文章对作为铁路综合视频监控系统重要组成部分的存储服务进行了研究。探讨了存储服务在铁路综合视频监控系统中的作用,并分析其在录像存储、查询和调取功能方面的现状。调查和分析了存储服务中常见的问题,包括录像查询慢、录像时长不足和录像中断等,得出了一些重要结果并提出解决方案,旨在提高录像查询速度和保证录像存储的完整性。文章为存储服务中的常见问题提供了有效的解决方案,有助于提高系统的性能和效率。

Wireless capsule video endoscopy:Three years of experience

AIM:To review and summerize the current literatue regarding M2A wireless capsule endoscopy. METHODS:Peer reviewed publications regarding the use of capsule endoscopy as well as our personal experience were reviewed. RESULTS:Review of the literature dearly showed that capsule endoscopy was superior to enteroscopy,small bowel follow through and computerized tomography in patients with obscure gastrointestinal bleeding,iron deficiency anemia, or suspected Crohn's disease.It was very sensitive for the diagnosis of small bowel tumors and for survailance of small bowel pathology in patients with Gardner syndrome or familial adenomatous polyposis syndrome.Its role in celiac disease and in patients with known Crohn's disease was currently being investigated. CONCLUSION:Capsule video endoscopy is a superior and more sensitive diagnostic tool than barium follow through, enteroscopy and entero-CT in establishing the diagnosis of many small bowel pathologies.

视频小波分析修复算法——以民俗体育记录视频为例

为提升视频的修复效果,提出了基于小波分析的视频修复算法。该算法通过关键点匹配对原始视频帧进行对齐,结合图像序列之间的关联性,检测视频缺陷区域,采用小波变换算法计算视频像素点优先权,最终实现视频修复。以某个民俗体育记录为例进行测试,结果表明,该方法能够有效修复破损区域结构,提升视频修复效果。

一种矿用本安型音视频记录仪

设计了一种矿用本安型音视频记录仪。设备基于5G SOC处理器,采用感光传感器+白光/红外激光补光+本质安全电路方案,在低照度、全黑或密闭空间的环境下,能采集、压缩、存储、显示4K高清视频图像,同时将采集的音视频数据进行实时远传;记录仪具有低照度环境下成像质量高、拍摄距离远、功耗小等特点,支持TCP/IP、UDP、RTP、ONVIF、GB28181等协议,除了作为井下信息记录外,还可以辅助应急指挥部及时展开救援行动。测试结果表明:记录仪黑暗环境下图片分辨率为10688×6012,视频分辨率为2560×1440,可视距离达20 m,数据丢包率约为0.068%,时延约为15.85 ms,可实现持续视频摄录9 h或持续视频回传4 h。

护患沟通能力培训课程反思性教学思考与实践

目的:观察线上教学联合视频实录的反思性教学模式对低年资护士护患沟通能力培养的教学效果,为有效提升护理人员的护患沟通能力开拓新型教学模式。方法:选取福建中医药大学附属人民医院低年资护士60人为研究对象,在护患沟通能力培训中对照组采取传统授课方式,研究组采取线上教学联合视频实录的反思性教学方式;运用《护患沟通能力测评量表》和《学员自我评价表》进行教学效果评价。结果:研究组护患沟通能力测评及学员自我评价的各方面维度得分与总分都明显高于对照组,具有统计学意义(P<0.05)。结论:线上教学联合视频实录的反思性教学模式更有利于低年资护士护患沟通能力的培养,可在教学运行中推广运用。

医学院校线上教学模式的探讨

目的:通过对直播和录播两种线上教学模式教学效果的比较与评估,为医学院校合理配置教学资源及有效开展线上教学活动提供参考。方法:以某省属医科大学本科生为调查对象,采用封闭式问卷调查的方式,对可能影响医学院校授课效果的诸多因素和教学体验的相关资料进行调查分析,据此设计医学院校线上教学模式的优化方案。结果表明:直播与录播两种线上教学模式均有各自优缺点,课程性质对教学模式的选择有一定的影响,在两种模式之间学生的教学体验没有显著性差异。结论:结合具体课程的特点和教学要求,采用线上线下有机结合的混合式教学,才能充分利用现有的教学资源,实现教学结构最优化、教学效率高效化。

基于嵌入式Linux的在线开放课程教学视频录制系统

针对录制视频质量差的问题,提出基于嵌入式Linux的在线开放课程教学视频录制系统,分析嵌入式Linux的特性以及多媒体技术,结合系统需求,将系统划分为多个不同的模块,通过各个模块分别录制不同层次和教学需求的教学视频。将在线开放课程教学视频分为连续区域和不连续区域两个部分,提取视频中各个区域的对象边界;采取高斯滤波和自适应滤波进行去噪,完成视频预处理。实验结果表明,系统能够有效减少视频播放卡顿次数,提升视频完整度,获取满意的视频录制效果。

论录像制作者权的适用空间与修法方案

录像制作者权不仅在适用上存在录像制品与视听作品的区分难题,在立法层面也有存废之争。录像制品相关规范的历史沿革表明,录像制作者权旨在周延保护连续画面,但其设置反映了我国立法者对邻接权制度的误读。邻接权的目的是保障特定主体的投入获得回报,并且不以对象独创性为设权的逻辑起点。录像制品对视听作品起补充保护而非分割界定的作用,更不能因其存在反而抬高视听作品的独创性标准,侵蚀视听作品及其著作权的适用空间。在著作权法采用视听作品概念后,建议废除录像制品条款,或至少将录像制品改为普通录像。

小肠胶囊内镜拍摄性能的定量临床评价方法探索

目的:探讨小肠胶囊内镜拍摄性能的定量临床评价方法。方法:将国内外2款主流小肠胶囊内镜置于纯黑、无光环境中,模拟胶囊内镜在消化道场景中运动并采集图像,分析胶囊内镜的传输帧速率和照明闪烁时间的变化,并基于研究结果提出评价胶囊内镜拍摄性能的方法。结果:国内主流小肠胶囊内镜运行4 min后出现传输帧速率降低现象,且每帧对应一次不固定时长的照明闪烁时间;国外主流小肠胶囊内镜未发现明显传输帧速率降低现象,且每帧对应一次固定时长和一次不固定时长的照明闪烁时间。当遇到光学反射特性差异大的场景时,国内主流小肠胶囊内镜调节曝光需2~12帧,而国外主流小肠胶囊内镜能够立即调节曝光。基于该研究结果提出应从拍照性能与视频性能2个方面对胶囊内镜静态与动态时拍摄得到的图像进行评估的定量评价方法。结论:定量评价胶囊内镜在光学反射特性变化大的消化道场景中的拍摄性能可以更加体现其临床价值,该研究为胶囊内镜的产品性能对比和临床评价提供了新的思路。

执法记录仪防抖算法研究

执法记录仪在执法过程中起到关键性的取证作用,但是由于随身佩戴,录制的视频晃动严重,影响后续的查看和处理。为提高执法记录仪的防抖效果,提出两轴机械防抖和视频防抖相结合的方案。同时,为提升执法记录仪在复杂环境下防抖效果的稳定性,提出一种动态校准的方案;为解决限位碰撞带来的姿态解析失真问题,提出一种快速恢复方案。

基于同步处理的机载视频实时记录技术研究

在机载航电系统中,为了能够实时、无损地记录显控子系统传来的实时视频数据,最大程度地保留原始视频的图像质量,研究了基于多任务同步处理的机载视频实时记录技术。通过详细阐述接收任务和存储任务的设计方法以及分析两者的同步策略,直观展示了基于同步处理的机载视频实时记录技术的实现架构。同时依托多核处理器平台来设计真实的测试场景,并在实际机载嵌入式系统中部署运行,其结果证实了基于同步处理的机载视频实时记录技术的正确性。

重大案件侦查终结前讯问合法性核查与非法证据排除之语境参差——兼论重大案件讯问核查的独立价值

重大案件侦查终结前讯问合法性核查制度随非法证据排除的不断推进应运而生,但因其规则设置中存在核查内容限缩、启动方式受限、核查窗口过窄、制度设计缺陷等情况未能与我国非法证据排除体系完全兼容。然而跳出思维桎梏来分析该项制度,可知其并非单纯地在排非规则羽翼下细化和落实方案,而是作为一种特殊的补充制度,从便宜性、荷载度、实效性、保护力等多方面考量均具有独立价值。从规则的演进、两种制度间的语境差异、前者的独立价值以及可进一步探索的优化完善方向出发,结合实务,通过对二元判断式规则、场景的预设及对策、数据赋能与人工智能等相关前景分析,提出完善与重塑方向。