无线视频服务器在ADSP-BF5614的研究与实现

通过对视频服务器相关资料的研究,提出了一种基于ADI公司专用DSP芯片ADSP-BF561的无线视频服务器的解决方案。硬件设计采用SAA7113芯片完成输入视频A/D转换,以ADSP-BF561芯片为核心硬件平台实现视频压缩编码,利用相应外围设备实现网络控制和传输。该方案由于使用了H.264视频编码标准、G729音频编码标准和基于CDMA1X无线网络技术的CDMA无线网络作为音视频数据的传输途径,具有良好的稳定性和可实现性。     

上海地区干部健康体检胸部肿瘤的X线分析

目的回顾性分析1996年～2000年上海地区干部在我院健康体检胸部肿瘤的检出情况,探讨健康体检在早期发现胸部肿瘤的意义和方法。方法全部病例均经电视透视发现胸部异常阴影后,再摄取胸部正侧位片,并进一步进行各种检查初步明确诊断,经随访、手术及病理证实。结果被检出的160例胸部肿瘤中,肺恶性肿瘤87例,肺良性肿瘤23例,纵膈肿瘤45例,胸壁横膈肿瘤5例。67例周围型肺癌平均瘤体直径2.2cm,≤2cm的早期肺癌38例占56.72%。在电视透视发现的67例周围型肺癌和45例纵膈肿瘤中,分别有25例(37.31%)和21例(46.67%)在胸部平片中不能显示。结论定期胸部健康体检是早期发现胸部肿瘤的主要方法,在干部保健工作中有重要意义。胸部电视透视是健康体检早期发现胸部肿瘤的重要手段,采用肿瘤追踪筛查方法能有效地提高肺部肿瘤检出率。     

双通道图像／数据传输系统

叙述了基于电视逆程数据插入技术的双通道图像／数据传输系统的设计及关键技术。该系统以电视信号为媒介，无需增加新的信道设备即可将模拟电视通道拓展为模拟／数字兼容通道，可提供传输速率达８６．４ｋｂ／ｓ的高速数据传输。系统性能可靠、传输速率快、纠错能力强，具有广阔的应用前景。     

VHS录像机软件伺服系统的开发

对ＶＨＳ录像机伺服系统的三种设计方法进行了比较，重点介绍了软件伺服的特点、原理及所需的硬件与软件算法，讨论了超级定时器单元的使用、伺服误差的计算、补偿滤波器的设计、特技放像的处理等。软件伺服系统的开发，对实现ＶＨＳ录像机关键技术的国产化有重大意义，并可推广至自控、通信等领域，应用前景广阔。     

微机化视频图形发生仪的研制

介绍了以单片机和ＣＲＴ显示器控制芯片ＣＲＴＣ为主的微机化视频图形发生仪的设计方法及原理．对用ＭＣ６８４５ＣＲＴＣ产生视频信号的方法及图象分辨率作了详细介绍，给出了将此视频图象发生仪作图象刺激仪的软件框图．     

Structural Characteristics of Video Lotteries: Effects of a Stopping Device on Illusion of Control and Gambling Persistence

Two studies investigated the effects of a video lottery terminal stopping device on gamblers thoughts and behavior. This structural characteristic allows players to voluntarily stop the spinning of the reels. The first study investigated the effect of this device on the development of illusions of control. It was predicted that players using the stopping device would believe that (1) symbols displayed could differ depending on when the game is stopped, (2) there is a possibility of controlling the outcome of the game, (3) skills may be a factor influencing the results, and finally (4) a stopping device would improve the probability of personal success (i.e., developing the illusion of control). The second study aimed to further evaluate the effects of the stopping device on gambling behavior. It was hypothesised that using the stopping device would encourage players to increase the number of games played in a session. Results confirmed all predictions and showed that offering a stopping device on video lottery terminals modifies gamblers cognition and behavior. The theoretical and practical implications of these results are discussed in the context of responsible gambling policies.     

碎片·场景·沉浸——由互联网+短视频看未来电影制作的发展趋势

互联网2.0时代的媒介特性要求传播内容应具有碎片化、场景式与沉浸式的特点。短视频又短又快的传播形式,恰是互联网对传播内容碎片化要求的体现;以趣缘聚类组织的垂直内容,暗合场景式传播的要求;视频制作技术的进步,成为沉浸式的视听体验的技术支持。由此可以窥见未来电影的发展图景,即更短的电影时长和镜头长度、依大数据算法决策的电影制作以及仿真的沉浸式的视听体验。     

360 Video: A prototyping process for developing virtual reality interventions

Abstract

Virtual reality (VR) has emerged as a promising technological intervention for anxiety disorders. However, there are no existing standards and best practices to evaluate the effectiveness of environments to achieve their intervention goals. The purpose of this study was to develop a VR intervention for student veterans with social anxiety disorder and test feasibility utilizing a three-stage development model. The development of a therapeutic VR environment may benefit from an interdisciplinary collaboration of researchers from various fields of study. Utilizing three stages of prototyping with two virtual reality platforms, fully immersive video (n?=?6) and three-dimensional (3-D) immersive virtual reality (n?=?8), the research team designed an intervention for student veterans with social anxiety disorder, testing bio-reactivity of participants. Results of prototyping include user feedback validating increased stress levels and increased bio-reactivity specifically in galvanic skin response and heart rate elevation. Implications include the use of 360° video for prototyping 3-D virtual reality interventions.     

Impression management techniques in crowdfunding: An analysis of Kickstarter videos using artificial intelligence

Crowdfunding entrepreneurs increasingly use videos to present their venture and themselves to potential investors. To do this effectively, they consciously or unconsciously use several impression management techniques. Based on human and automated (AI-based analysis) of technology-related videos, we determine which impression management techniques help crowdfunding creators to attract a higher number of backers and meet their financial targets. Our results indicate that self-presentation and exemplification techniques are positively associated with crowdfunding success, while intimidation is negatively related to crowdfunding success. Our findings show that automated analysis of videos using advanced AI can replace human coding since measures based on human coding become insignificant when AI-based measures are included in the analysis. This illustrates the insights companies can create through the large scale automated analysis of video content using AI, including outside of a crowdfunding context.