Sexually Dimorphic Tridimensionally Preserved Pterosaurs and Their Eggs

<正>The pterosaur record is generally poor,with little information about their populations,and pterosaur eggs are even more rare,with only four isolated and flattened eggs found to date.Dr.WANG Xiaolin,Institute of Vertebrate Paleontology and Paleoanthropology(IVPP)of the Chinese Academy of Sciences(CAS),and his team revealed a new pterosaur-rich area with potentially thousands of bones,including tridimensionally preserved male and female skulls and eggs discovered together for the fi rst time in the Early Cretaceous deposit of the TurpanHami Basin,south of the Tian Shan Mountains in Xinjiang Uygur Autonomous Region,northwestern China.On June 6,the researchers reported online a population of a new sexually dimorphic pterosaur species(Hamipterus tianshanensis gen.et sp.nov.),with five exceptionally well-preserved three-dimensional eggs in Current Biology,providing new and important evidence regarding male and     

The Effectiveness of an Augmented Reality Head-Mounted Display in Learning Skull Anatomy at a Community College

Despite an increase in the use of technology in undergraduate anatomy education, and the rising popularity of online anatomy courses at community colleges in the United States, there have been no reports on the efficacy of augmented reality on anatomy education in this population. The purpose of this study was to test the hypothesis that augmented reality is an effective and engaging tool for learning anatomy in community college students. Participants recruited from Cuyahoga Community College (Cleveland, OH) studied skull anatomy using either traditional tools (i.e., textbook and plastic skull model) or an augmented reality head-mounted display with an interactive virtual skull application. Comparison of knowledge before and following the study period revealed that augmented reality was an effective tool for learning skull anatomy: pre-quiz = 32.7% (± 25.2); mean (± SD), post-quiz = 61.8% (± 19.5); n = 15; t₍₂₈₎ = 3.53; P = 0.001. The traditional tools were equally effective: pre-quiz = 44.9 % (± 18.6), post-quiz = 67.9 % (± 17.3); n = 17; t₍₃₂₎ = 3.73; P = 0.0007. Students rated the augmented reality device as 9.6 (± 1.0); mean (± SD) when asked if it fit the statement “fun to use” on a semantic differential scale from 1 (poor) to 10 (excellent). In conclusion, this study found that augmented reality is an effective and engaging tool for the instruction of skull anatomy at a community college.     

颅脑外伤半年后智商鉴定223例结果分析

目的:回顾性总结颅脑外伤后的智商状况.方法:对颅脑受过创伤的223例患者的智商鉴定结果进行总结、分析.结果:患者颅脑外伤后的平均智商水平处于轻度缺损的范围,没有重度与极重度者,而且智商水平基本不受年龄、性别以及受伤前文化程度等因素的影响.结论:颅脑受到创伤后经过一定时间,脑功能可以获得最大限度的恢复;颅脑外伤后的智商鉴定时间在伤后半年到一年的时间内比较适宜.     

对足球运动员头顶球时头颅受力情况的分析与研究

头顶球技术在当今足球比赛中愈来愈受到教练员和运动员的重视，高速度、强对抗的整体型现代足球打法，使得比赛中激烈的争夺由地面发展到高空，头顶球技术是争夺高空的主要手段．本文拟对头顶大力踢出的足球时颅骨、颅脑的受力情况进行分析和研究，找到其不受损伤的理论依据，使初学者消除顾虑，结进行教学训练的教研者提供一些可靠的数据，以利于足球运动更广泛的开展和提高。     

科学训练嗓音 提高歌唱能力

科学教练嗓音,纠正学生歌唱中的错误,是培养学生歌唱能力的一把金钥匙。