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.     

变动均值和方差资产配置模型的应用研究

本文在均值-方差模型的基础上，以改善估计误差为主线，选取了10种变动均值-方差的资产配置模型，以等权重策略为基准，运用了确定性等价收益和Alpha值为判断准则，同时考虑了允许卖空限制和非允许卖空的情况，实证研究结果表明：虽然在资本市场中配置模型并不能显著战胜等权重策略，但随着投资范围的扩大，模型开始显现配置效果，尤其在Alpha准则下，变动均值-方差资产配置显著。同时本文还将实证结果和目前我国投资者的实际资产配置情况进行了比较，发现了现实配置结构中的不合理之处，并提出了相应的改善建议。最后对4类常用资产进行了模拟研究，其结果也进一步证实了本文的结论。     

融合内容分析和关联分析的短生命周期体验品需求特征模式挖掘方法研究

挖掘特定产品的需求模式无法从整体掌握该类产品的市场特征；短生命周期体验品因缺乏历史销售数据，并且销售总量波动性极大，尤其需要从整体掌握销售总量与产品属性间关系的需求特征规律，但又难以挖掘，亟待提出适用于该类产品的需求特征模式挖掘方法。基于按销售总量分区后各区的需求特征的规律性，提出了一种按销售总量分区、以已有产品介绍集和销售总量为源信息、适用于新产品开发前使用、融合内容分析和关联分析的短生命周期体验品需求特征模式挖掘方法。该方法包括基于内容分析法的产品属性挖掘方法和基于关联分析的产品属性关系模式挖掘方法。前者可以得到较全面的产品属性；后者能够构建不同销售总量区间内产品集的属性关系模式，得到各区间的产品属性关系网，获得高销售总量区间具备，但中、低区间不具备的属性关系模式，从而获得需求特征模式。通过不断更新产品介绍集和销售总量并迭代挖掘，该方法能够动态挖掘需求特征模式。最后利用2013至2016年国产犯罪和爱情类电影数据验证了该方法的可行性，并得到了这两类电影的产品属性及近年的需求特征模式，可用于指导这两类电影的创作。     

共生与互融:短视频时代大学生的国家认同教育

大学生国家认同意识关乎国家发展主体合力的生成与国家网络意识形态安全，更关系到人民对美好生活的向往和时代新人的使命担当。短视频解释性、场景化和感染力的特质优化了国家认同教育空间体验，创新了国家认同教育话语表达，开创了国家认同教育多元风格，重塑了国家认同教育作用圈层；但在资本逻辑、技术逻辑和商品逻辑的操控下，短视频行业跌入了“欲望泛化”“感性狂欢”和“物的迷恋”的怪圈，衍生出了消解大学生国家认同意识的隐性因子。面对潜伏性危机，高校必须分析和挖掘国家认同教育与短视频平台发展的内在契合点和价值共生点，强化内容认同、角色认同、思想认同和行为认同，促进国家认同意识的内化与外化。     

Nonparametric beta kernel estimator for long and short memory time series

In this article we introduce a nonparametric estimator of the spectral density by smoothing the periodogram using beta kernel density. The estimator is proved to be bounded for short memory data and diverges at the origin for long memory data. The convergence in probability of the relative error and Monte Carlo simulations show that the proposed estimator automatically adapts to the long- and the short-range dependency of the process. A cross-validation procedure is studied in order to select the nuisance parameter of the estimator. Illustrations on historical as well as most recent returns and absolute returns of the S&P500 index show the performance of the beta kernel estimator. The Canadian Journal of Statistics 48: 582–595; 2020 © 2020 Statistical Society of Canada     

When to Make the Sensory Social: Registering in Face‐to‐Face Openings

This article analyzes naturally occurring video‐recorded openings during which participants make the sensory social through the action of registering—calling joint attention to a selected, publicly perceivable referent so others shift their sensory attention to it. It examines sequence‐initial actions that register referents for which a participant is regarded as responsible. Findings demonstrate a systematic preference organization which observably guides when and how people initiate registering sequences sensitive to ownership of, and displayed stance toward, the target referent. Analysis shows how registering an owned referent achieves intersubjectivity and puts involved participants' face, affiliation, and social relationship on the line. A video abstract is available at https://youtu.be/rNL70vawG3o     

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.     

卖空压力对企业债券期限选择的影响——来自中国放松卖空管制准自然实验的证据

放松卖空管制后,投资者可通过挖掘公司“坏消息”在资本市场投资获利,在允许被卖空情境中,公司内部股东和管理层面临股价下行压力增大,会积极采取行动以规避被卖空的风险。借助中国证券市场2010年开始逐步放松卖空管制的准自然实验,以2007—2015年上市公司为样本,考察卖空压力对企业债券契约的影响。研究发现:放松卖空管制与企业债券期限显著负相关,特别是在大股东持股比例较高和管理层市场压力更大时。进一步分析发现,放松卖空管制与企业债务期限结构显著负相关,表明放松卖空管制会促使企业缩短发行债券的期限。研究结果显示,面对放松卖空管制引起的股价下行压力,公司大股东和管理层为了规避被卖空风险,会积极选择缩短发行债券期限以传递信号,证实了卖空机制对改善市场信息环境的积极作用。政府可以通过加强卖空机制制度建设和监管,推动企业调整行为决策,降低信息不对称。     

The Permeable Border: Examining Responses to North American Integration in Video Art

Abstract

In this essay, I suggest that artistic production provides valuable insights into the nature of the Canada-US border during the late-twentieth century when significant changes were occurring to dominant understandings of Canada in relation to North America. Focusing on the medium of video art, I trace the sustained engagement of Canadian contemporary artists to respond to and comment on the move towards continental integration through free trade. I contextualize my discussion in relation to trade developments that opened Canada’s border with the US, such as the 1989 implementation of the Canada-US Free Trade Agreement. This agreement, along with the later North American Free Trade Agreement, led to increasing continental integration at the end of the twentieth century, as well as hope for hemispheric integration with the subsequent negotiations towards the Free Trade Area of the Americas. With attention to works by Lisa Steele and Kim Tomczak, Eva Manly, and Clive Robertson, I foreground cultural contributions to redefining the Canada-US borderlands. Here, I chart the artists’ intention to echo narratives of the border’s porousness and address the power dynamics between the Canadian state and its trade partners. Examining themes of cultural imperialism, colonialism, and national identity, I point to the importance of cultural production in assessing the borderlands and, more broadly, histories of free trade in North America.     

公共视频监控图像信息利用与保护的基本法律问题与立法规制

在智能化和法治化的新时代，公共视频监控图像信息综合应用已成为社会治理社会化、法治化、智能化和专业化的重要方式。公共视频监控系统成为政府部门和社会组织保护公共安全以及公民人身、财产安全的技术项目。公共视频监控图像信息的技术手段和法律属性需要以立法形式加以规定。公共视频监控图像信息综合应用需要在权利保护的法律制度中进行，尤其是视频监控图像信息公开使用与信息安全、隐私权保护之间的法律制度设计。因此，公共视频监控图像信息的法律规制工作应对法律主体、基本原则、权利体系、法律监管、法律责任做出明确规定。