Using an Activity to Simulate the Dangers of Multitasking with Technology while Walking

People are increasingly trying to multitask while walking. Text messaging while walking is a significant area for concern. The number of text messages sent is expected to be more than 8 trillion in 2012. Texting is becoming so commonplace that people use this technology while engaged in other activities. The dangers of multitasking have hit the streets as people are becoming involved in more accidents while walking as they text on mobile phones. This simulation activity measures a student's ability to multitask by texting and walking. The activity simulates walking in the real world and is best suited for middle school students. Additional activities, after completing the simulation, will challenge middle school students to learn more about multitasking globally through scientific inquiry researched on the Internet. The students will use language arts skills to generate a report or presentation to share with classmates. Their findings will give the entire class a cultural perspective on accident statistical comparisons between different countries.     

Circulation of whale-bone artifacts in the northern Pyrenees during the late Upper Paleolithic

The importance of coastal resources in the late Upper Paleolithic of western Europe has been reevaluated in recent years thanks to a growing body of new archeological evidence, including the identification of more than 50 implements made of whale bone in the Magdalenian level of the Isturitz cave (western Pyrenees). In the present study, the assemblages of osseous industry from 23 Magdalenian sites and site clusters in the northern Pyrenees were investigated, systematically searching for whale-bone implements. The objective of this research was to determine if, and how, tools and weapons of coastal origin were circulated beyond Isturitz into the inland, and if similar implements existed on the eastern, Mediterranean side of the Pyrenees. A total of 109 whale-bone artifacts, mostly projectile heads of large dimensions, were identified in 11 sites. Their geographic distribution shows that whale bone in the Pyrenean Magdalenian is exclusively of Atlantic origin, and that objects made of this material were transported along the Pyrenees up to the central part of the range at travel distances of at least 350 km from the seashore. This phenomenon seems to have taken place during the second half of the Middle Magdalenian and the first half of the Late Magdalenian, ca. 17,500–15,000 cal BP (calibrated years before present). The existence of a durable, extended coastal-inland interaction network including the circulation of regular tools is thus demonstrated. Additionally, differences between the whale-bone projectile heads of the Middle Magdalenian and those of the Late Magdalenian document an evolutionary process in the design of hunting weapons.     

黑龙江省野生东北虎调查管理信息系统的构建

文章以黑龙江省野生东北虎（Panthera tigris altaica）野外调查数据为基础,利用地理信息系统技术、计算机技术与野生动物资源调查管理技术,构建了黑龙江省野生东北虎调查管理信息系统。主要运用面向对象程序设计语言C#和ArcGIS Engine嵌入式组件技术以及SQL Server数据库技术,设计并构建东北虎调查管理系统,实现了对野生东北虎调查数据的图形可视化操作管理。同时,结合研究区域内的自然因素和人文因素对调查资源进行动态的空间分析,及时准确地反映出东北虎的种群数量和空间变化规律,并制作出相应的分类专题图及野外分布信息统计图表等。该管理信息系统将有助于野生东北虎种群及栖息地调查数据与资料的科学管理,对于推动我国野生东北虎就地保护和科学管理具有重要意义。     

大规模蛋白质相互作用组实验技术及其应用

大规模蛋白质相互作用研究的主要实验技术包括酵母双杂交技术、串联亲和纯化技术和蛋白质芯片技术,随着这些技术的不断发展和完善,科学家们在模式生物、哺乳动物、病原微生物中展开了大规模的蛋白质相互作用组研究,并进行了药物研发方面的研究,绘制了多种生物的蛋白质相互作用连锁图,揭示了多种蛋白质的新功能,为全面研究蛋白质（群）的分子作用机制、药物研发和疾病的临床预防与治疗等提供了崭新的线索。     

上海市临床医师对基因技术与生命伦理的认知

上海市公立医院临床医师对基因技术与生命伦理的认知调查显示,临床医师对基因技术的优势与风险有一定的认知,但认知差异较大,需要对临床医师加强生命伦理的培训,加强基因相关法规的建设。     

基于SPAC系统干旱区水分循环和水分来源研究方法综述

土壤-植物-大气连续体(SPAC)是研究植物水分利用与循环的核心,研究其水分传输过程对于旱区植被恢复具有重要指导意义.本文从土壤水分和植物蒸腾两个方面进行阐述,对土壤水分的研究主要涉及热惯量法、中子仪法和时域反射仪法,植物蒸腾则从枝叶尺度、单木尺度、林分尺度和区域尺度4个层面分类总结;并重点介绍了稳定同位素方法在研究植物不同水分来源中的应用.     

马尾松松针挥发油提取工艺研究

本文研究水蒸气蒸馏法提取马尾松松针挥发油的工艺。通过单因素试验考察液固比、提取时间、松针长度、浸泡时间4个因素对马尾松松针挥发油得率的影响,运用L9(34)正交试验探索最佳工艺条件。结果表明,浸泡时间对挥发油提取有显著影响(P=0.045),最佳时间为7 h;液固比、提取时间、松针长度无显著影响(P>0.05)。最佳工艺条件为液固比9∶1、提取时间3 h、松针长度5 mm、浸泡时间7 h,通过验证实验验证此工艺稳定可行。