试论新闻自由——以5·12汶川大地震新闻报道为例

新闻自由是一个老话题。以5·12汶川大地震新闻报道为例,论述了我国新闻自由表现的几个方面,分析了我国新闻自由的实质,提出要实现我国新闻自由应具备的前提和保障,指出通过5·12地震报道,应该看到我国政府的进步、媒体的进步、新闻自由的进步,以政府信息公开保障媒体新闻自由的实践正在发展。     

汶川不哭 四川雄起——论四川灾后重建的精神力量

本文认为,应当充分发挥精神与文化的力量,引领与促进“5·12”汶川大地震后重建工作的顺利完成。首先是应当相信科学,树立信心,尽快地从地震灾害的阴影之中走出来;其次是要继承并发扬巴蜀祖先面对重大灾难时所焕发出来的极为强大的再生力,重建我们的美好家园;再次是要正确认识四川人的性格特点,除了大众公认的轻捷、聪慧、闲适、幽默的性格之外,四川人还有勇武倔强的一面,这是今天我们重建家园的重要精神力量之一;最后,我们要将灾后两个多月来所表现出的“雄起”精神继续发扬下去,在擦干眼泪后微笑着抗震救灾,重建家园。     

汶川大地震后四川旅游业的重建对策

2008年的“5·12”汶川大地震,使作为四川重要支柱产业之一的旅游业受到沉重打击,地震波及地区,包括了成都及四川的重要旅游景区景点、以及通往主要景区的交通线所在区域。如何在“5·12”汶川大地震后恢复四川旅游业,就成为灾后重建的重要工作之一。本文认为,结合四川的实际情况,在灾后重建四川旅游业,可以采用启动市场、震后营销、重新规划、突出重点、阶段推进、文化重塑、探索新路的方针。     

一种前向散射式能见度仪的原理分析与使用维护

介绍了FD12前向散射能见度仪的构成、工作原理、安装环境要求及日常维护等问题。     

国外创伤后应激障碍干预模式及其启示

5·12地震给人们心理健康造成极大损伤,这对我国的危机干预体系是一个严峻的考验。而国外的干预模式则相对成熟．这些不同的干预模式可分为三类：一是阶段划分模式,即针对干预过程不同阶段的特点采取不同的措施。二是整合模式,即将不同的干预模式、支持资源加以整合。三是特异性模式,即针对特殊人群、特殊情境的干预策略。我们虽然不能照搬外国的干预模式,但其思路与技术、经验与教训还是值得借鉴的。     

Use of Web 2.0 technologies in K-12 and higher education: The search for evidence-based practice

Evidence-based practice in education entails making pedagogical decisions that are informed by relevant empirical research evidence. The main purpose of this paper is to discuss evidence-based pedagogical approaches related to the use of Web 2.0 technologies in both K-12 and higher education settings. The use of such evidence-based practice would be useful to educators interested in fostering student learning through Web 2.0 tools. A comprehensive literature search across the Academic Search Premier, Education Research Complete, ERIC, and PsycINFO databases was conducted. Empirical studies were included for review if they specifically examined the impact of Web 2.0 technologies on student learning. Articles that merely described anecdotal studies such as student perception or feeling toward learning using Web 2.0, or studies that relied on student self-report data such as student questionnaire survey and interview were excluded. Overall, the results of our review suggested that actual evidence regarding the impact of Web 2.0 technologies on student learning is as yet fairly weak. Nevertheless, the use of Web 2.0 technologies appears to have a general positive impact on student learning. None of the studies reported a detrimental or inferior effect on learning. The positive effects are not necessarily attributed to the technologies per se but to how the technologies are used, and how one conceptualizes learning. It may be tentatively concluded that a dialogic, constructionist, or co-constructive pedagogy supported by activities such as Socratic questioning, peer review and self-reflection appeared to increase student achievement in blog-, wiki-, and 3-D immersive virtual world environments, while a transmissive pedagogy supported by review activities appeared to enhance student learning using podcast.     

Forward-Thinking Teens: The Effects of College Costs on Adolescent Risky Behavior

This paper analyzes the effect of college costs on teenagers’ engagement in risky behaviors before they are old enough to attend college. Individuals with brighter prospects for future schooling attainment may engage in less drug and alcohol use and risky sexual activity because they have more to lose if such behaviors have harmful effects in their lives. If teens correctly predict that higher college costs make future college enrollment less likely, then adolescents facing different expected costs may choose different levels of risky behavior. I find that lower college costs in teenagers’ states of residence raise their subjective expectations regarding college attendance and deter teenage substance use and sexual partnership. Specifically, a $1,000 reduction in tuition and fees at 2-year colleges in a youth's state of residence (roughly a 50% difference at the mean) is associated with a decline in the number of sexual partners the youth had in the past year (by 26%), the number of days in the past month the youth smoked (by 14%), and the number of days in the past month the youth used marijuana (by 23%). These findings suggest that the often-studied correlation between schooling and health habits emerges in adolescence because teenagers with brighter college prospects curb their risky behavior in accordance with their expectations. The results also imply that policies that improve teenagers’ educational prospects may be effective tools for reducing youthful involvement in such behaviors.     

Evaluation of Serum Vitamin B12 Levels and Its Correlation with Anti-Thyroperoxidase Antibody in Patients with Autoimmune Thyroid Disorders

Vitamin B12 deficiency has been reported in patients with Autoimmune thyroid disorders. However there is limited data on exact prevalence of low B12 and its correlation with anti-thyroperoxidase antibody (anti-TPO) levels in these patients. The aim of our study was to estimate serum vitamin B12 levels in autoimmune thyroid disorders and to correlate B12 levels with anti-TPO. 350 patients were selected by convenient sampling. Vitamin B12 levels and thyroid parameters were estimated using fully automated chemiluminescence method on Access 2. Results of our study shows that using the manufacturer’s cut-off of 145 pg/mL, the prevalence of low serum vitamin B12 was found to be 45.50 %. Higher prevalence (55 %) was seen based on the published cut-off of 200 pg/mL The study however did not demonstrate any significant correlation between vitamin B12 levels and anti-TPO (r = −0.11 and p value of 0.30).

Electronic supplementary material

The online version of this article (doi:10.1007/s12291-014-0418-4) contains supplementary material, which is available to authorized users.     

具有自动识别功能的黑板擦

设计了一种由单片机(STC12C5616AD)控制的智能黑板擦,能自动识别粉尘位置,自由移动,并在擦出后自动收集粉尘。该黑板擦由粉尘传感器、采集电路、四轮驱动机构、单片机(STC12C5616AD)、吸尘装置等部分构成,其特征是:利用粉尘传感器实现定位;利用电机正反转原理控制板擦的上下左右的移动;利用磁材、自动控制擦除装置与黑板的接触与分离,实现随时随意擦除的功能;利用负压原理实现粉尘的集中处理。     

论毕节试验区“十二五”期间的产业结构和经济发展方式

毕节试验区"十二五"期间的产业结构调整和经济方式转变问题已日益凸显,在"十一五"期间经济社会发展取得重大成效的基础上,必须着力加大产业结构调整步伐,切实转变经济发展方式,以发展生态经济为突破口,承接全国性的产业转移,大力发展"四色经济",鼎力实施"四E集成",进一步增强全区经济发展实力,推动毕节试验区经济社会的跨越式发展。