参与体育运动是干预大学生网络成瘾的重要手段

"网络成瘾"严重危害着青少年的身心健康,日益受到社会各界的高度关注。通过调查大学生网络成瘾现状,分析网络成瘾症形成的内外原因;实施对部分研究对象进行体育教学内容手段、课余体育活动以及教师行为三个方面的干预,并对干预前后的四个指标进行对比分析,证明短期干预效果显著,建议进行长期干预以期取得更好效果。     

艾米莉·狄金森的死亡美学及深层意蕴探究

美国女诗人艾米莉·狄金森被推崇为西方现代派诗歌的先驱。在其遗留下来的1 700余首诗稿中,有大约近600首诗歌是以死亡为题材的,是其一生诗作总数的三分之一。诗人从不同角度、不同层面描写死亡,向世人展现了其对死亡的独特理解。在艾米莉·狄金森的笔下,死亡主题被赋予了更深层次的意蕴。艾米莉·狄金森通过对死亡的描述,阐释了生命的终极意义,她对死亡价值的判断体现了探讨生命真谛、扩展生命张力、让精神永恒的美学思想。     

地方政府间支出责任划分对区县基本医疗卫生服务均等化水平的影响

1994分税制改革后,由于缺少明晰的财权事权划分标准,造成各级政府财力和支出责任不对等.本文根据《中国卫生服务调查》和《中国财政年鉴》数据,使用基尼系数测度区县基本医疗卫生服务的均等化水平,利用分位数回归方法分析地方政府间支出责任划分对区县基本医疗卫生服务均等化的影响.结果表明:政府卫生支出责任上移,区县政府支出责任的减轻有助于提高区县间基本医疗卫生服务的均等化水平.     

陕西省地方政府行政管理支出实证研究

在厘定统计口径的前提下,依据公开的数据、资料,从纵向和横向两个维度对陕西省政府行政管理支出进行了计算、分析和比较,并增加了行政支出对GDP占比数、人均行政支出等测算维度;研究数据表明:陕西省地方政府行政管理支出目前在全国范围内居于中等略偏下的位置,说明陕西省行政管理效率在逐步提高,行政改革也取得了一定的成效;同时,针对陕西省地方政府行政支出中的不合理因素提出解决思路。     

晚清“国民之母”话语及其女性想象

晚清,先觉者们纷纷引进西方的政治学说来救亡中国,论述新“国民”成为梁启超构建民族国家观的重要途径。“国民”一词盛行之后,“国民之母”的话语也顺应而生。“国民之母”话语让原本严重丧失基本人权的女性转而被圣神化,而话语背后也蕴含了男性启蒙者们强国保种的政治意图以及对女性“母亲”角色的期待。     

基于次梯度投影的泛投资组合选择策略

在线投资组合选择(online portfolio selection)问题是当前量化投资领域一个重要的研究问题.近些年来,可投资标的的爆炸式增长急需能够有效计算的投资组合选择策略,而现有高绩效算法大多具有指数级或多项式级的时间复杂度,不利于在实际中应用.由此,本文提出了一种基于次梯度投影的泛投资组合选择策略SGP.将次梯度投影的思想应用到资产组合构建的过程中,得到策略的再平衡规则.理论上,本文分析了次梯度投影算法的竞争性能,证明了该策略是一个泛投资组合选择策略;并发现该算法具有线性时间复杂度.实证上,验证了SGP策略在美国与中国市场的表现.结果表明,SGP策略能够实现和最新的泛投资组合选择策略相当的收益率,而算法运行时间短于现有策略.参数敏感性分析表明SGP策略对参数选择不敏感;交易成本敏感性分析表明SGP策略能够承受合理的交易成本.     

URBAN TRANSPORTATION MODE CHOICE AND TRIP COMPLEXITY: BICYCLISTS STICK TO THEIR GEARS

Commuters' lives have become more complicated with rising income. In my model, transportation mode choices are made simultaneously with the choice of whether to make multiple stops. Using travel behavior data, I estimate the model using an error components logit (ECL) specification to account for commuters' unobserved preferences for particular modes and find that omitting unobserved preferences underestimates value of travel time relative to the crossing‐components ECL. The estimated model predicts that increased trip complexity causes substitution away from public transit to automobiles, with the exception that bicyclists transition only to more complex trips and do not change transportation modes. (JEL R41, C25)     

Transparency tested: The influence of message features on public perceptions of organizational transparency

The concept of transparency has been promoted within the public relations and business literature as both ethical and advantageous; however, the effectiveness of transparency is seldom empirically put to the test. In particular, the use of clarity, disclosure, and accuracy in organizational messages needs to be empirically examined. To this end, we conducted an online experiment using a 2 (high vs. low message transparency) x 2 (news story placed before or after an organizational statement) between-subjects design. Participants (n?=?357) perceived organizations as more transparent and credible when exposed to messages exhibiting greater levels of clarity, disclosure, and accuracy as opposed to messages that did not. Placement of an information anchor in the form of an objective news story before the organizational message increased the perceived organizational transparency when messages employed transparent design features and decreased the perceived organizational transparency when messages did not use these features. These results provide significant implications for practitioners attempting to convey organizational transparency at the tactical level through message features.     

Relationship building and message planning: An exploration of media challenges and strategies used during school crises at the P-12 level

Schools at the P-12 level increasingly face crises related to school shootings, violence, and other tragedies. Understanding the communication challenges schools face is paramount to assisting schools with communication before, during, and after crisis events. The current study focuses on the challenges created by media interest in such crises and the strategies implemented to overcome these challenges and provide responsible information to stakeholders. Interviews conducted with 21 school crisis teams at the P-12 level revealed that sensationalism, seeking alternative routes to information, and framing were key challenges in working with the media. In light of these challenges, administrators focused on creating media plans, building relationships with the media, being accurate but guarded, and communicating reassurance and reunification. Implications are discussed for school districts nationally.     

Development of the Emergency Department Senior Abuse Identification (ED Senior AID) tool

Emergency departments (EDs) are an important health care setting for the identification of elder abuse (EA). Our objective was to develop an ED-based tool to identify EA. The initial tool included a brief cognitive assessment, questions to detect multiple domains of EA, and a physical examination. Refinement of the tool was based on input from clinical experts and nurse and patient feedback. The revised tool, which included 15 questions about EA, was then tested in an academic ED. We calculated the inter-rater reliability, sensitivity, and specificity of individual EA questions. Among ED patients age≥65 (N = 259), 17 (7%) screened positive for suspicion of EA. We identified a combination of six questions that cover the included domains of EA, demonstrated good or excellent inter-rater reliability, and had a sensitivity and specificity of 94% (95% confidence interval (CI) 71–100%) and 90% (95% CI 85–93%), respectively. These results inform a proposed screening tool for multisite validation testing.