A sequential analysis of responses in online debates to postings of students exhibiting high versus low grammar and spelling errors

Given that grammatical and spelling errors have been found to influence perceived competence and credibility in written communication, this study examined how a student’s grammar and spelling errors affect how other students respond to the student’s postings in four online debates hosted in asynchronous threaded discussions. Message-response exchanges were sequentially analyzed to identify patterns in students’ replies to arguments and challenges with counter-challenges, explanations, and evidentiary support posted by students that exhibited low versus high number of grammatical and spelling errors. Although no causal inferences can be drawn from this study, the findings nevertheless suggests that: (a) arguments posted by high-error students are more likely to be challenged than arguments posted by low-error students; (b) exchanges between high-error students can amplify the effects of grammar/spelling errors; and (c) higher levels of argumentation can be achieved by placing students into groups that are heterogeneous in writing skills in general. The findings and methods used in this study lay the groundwork for further research on strategies for managing individual differences in students’ grammar and spelling (and other student behaviors in general) and increasing the level of critical discourse in online discussions.     

基于灰色GM（1，1）模型的宁夏入境旅游客源市场预测研究

为了给宁夏旅游客源市场的规划发展提供决策上的参考,从拓展入境旅游客源市场方面,采用灰色理论构建了宁夏入境旅游客源市场的灰色GM（1,1）预测模型,并通过各项指标的检验,得出模型的预测级别为好,并预测了未来5年宁夏入境旅游人数．可以看出,宁夏入境旅游人数正处于较快增长阶段,并已拥有较稳定的海外客源市场．     

城市道路通过远引掉头间接左转最佳位置选取方案

由于掉头口位置选取是城市道路远引掉头技术中的重要因素,为了提高远引掉头实施效果,从安全和运行效率2个方面对远引掉头口和上游支路出口之间的距离对远引掉头实施效果的影响进行了分析.对美国佛罗里达州开展了广泛的数据采集,共得到179个不同路段的历史事故数据,采用录像观测法获得了29个不同路段的交通流运行数据.在实测数据的基础上构建了事故率模型和车辆运行时间模型.研究表明,掉头口和上游支路之间的间距对掉头车辆的安全性和运行效率有显著影响.根据研究结果,提出了针对不同道路条件下设置掉头口和上游支路出口应保证的最短距离以方便司机使用掉头口.分析研究结果可为国内交叉口改造提供借鉴.     

“破窗理论”对安全培训的借鉴

美国斯坦福大学有一位心理学教授曾做过一项试验：将两辆外形完全相同的汽车停放在相同的环境里，其中一辆车的车窗是打开的，车牌也被摘掉；另一辆则封闭如常。结果打开车窗的那辆车在三日之内就被人破坏得面目全非，而另一辆则完好无损。这时候，他在剩下的这辆车的窗户上打了一个洞，只一天时间，车上所有的窗户都被打破，车内的东西也全部丢失。于是他据此提出了“破窗理论”：对于完美的东西，     

中国民办大学培养专业硕士探索

民办高校试点硕士专业学位研究生教育,不仅能对民办高校起到引领和示范作用,也能对其它新建本科高校的改革与发展提供借鉴与经验,有利于民办高校提高办学质量,实现良性可持续发展。文章通过分析5所民办高校专业硕士微观层面的培养方案及激励政策,给出如下宏观建议：一是相关高校应联合起来组成中国民办大学专业硕士培养委员会。二是与欧美、港台高等教育发达国家或地区展开专业硕士研究生培养合作。三是与国内公办高等教育机构展开联合培养工作。     

论发展性大学生综合素质评价体系的构建

本文在分析学生综合素质评价体系改革必要性、可能性的基础上,对构建发展性大学生综合素质评价体系的基本理念、指标体系、实施方法和结果处理等进行了探讨,为高校学生综合素质评价体系的改革与实践提供新的思路。     

信息化教育——才培养模式研究

本文通过对传统教学人才培养模式及现代教学人才培养模式的比较,阐述了高素质、复合型、创造型人才的培养,要应用现代教育技术构建创新的教育模式,建设与之相适应的硬件环境和软件环境,加速创新人才的培养.     

师范生模拟教学心理健康问题及矫正策略

师范生模拟教学存在紧张、自卑、自负、畏难、依赖等心理健康问题.教学中,采取科学的矫正策略,扫清这些心理障碍,培养他们正确客观的自我认知能力,良好的自我控制能力和独立创新的个性品质,对促进师范生优良教学素质和心理健康素质的形成与提高具有重要意义.     

合成孔径雷达杂波功率谱的计算

在传统的杂波计算中,将地表进行"等距离-等多普勒"划分。以雷达天线的发射、接收理论和雷达的目标散射理论为基础,推导出合成孔径雷达杂波功率谱的计算公式,并对公式的闭合积分解和实时算法进行了讨论。     

Piezoelectric-driven droplet impact printing with an interchangeable microfluidic cartridge

Microfluidic impact printing has been recently introduced, utilizing its nature of simple device architecture, low cost, non-contamination, and scalable multiplexability and high throughput. In this paper, we have introduced an impact-based droplet printing platform utilizing a simple plug-and-play microfluidic cartridge driven by piezoelectric actuators. Such a customizable printing system allows for ultrafine control of droplet volume from picoliters (∼23 pl) to nanoliters (∼10 nl), a 500 fold variation. The high flexibility of droplet generation can be simply achieved by controlling the magnitude of actuation (e.g., driving voltage) and the waveform shape of actuation pulses, in addition to nozzle size restrictions. Detailed printing characterizations on these parameters have been conducted consecutively. A multiplexed impact printing system has been prototyped and demonstrated to provide the functions of single-droplet jetting and droplet multiplexing as well as concentration gradient generation. Moreover, a generic biological assay has also been tested and validated on this printing platform. Therefore, the microfluidic droplet printing system could be of potential value to establish multiplexed micro reactors for high-throughput life science applications.