高校科研处长"双肩挑"的利弊调研

为充分开发高校科研处长的人才资源,在29所高校,对10l位科技管理人员进行了科研处长“双肩挑”的利弊调研。多数人认为,“双肩挑”有利有弊,要具体情况具体分析。校、院、系领导层中,认为利大于弊的较多,一般科研工作人员中认为弊大于利的较多。多数人建议,今后一段时间,多数专职,少数“双肩挑”。作者还讨论了“双肩挑”的“挑量”和今后做法。     

Validation of a videogrammetry technique for analysing American football helmet kinematics

ABSTRACT

Professional American football games are recorded in digital video with multiple cameras, often at high resolution and high frame rates. The purpose of this study was to evaluate the accuracy of a videogrammetry technique to calculate translational and rotational helmet velocity before, during and after a helmet impact. In total, 10 football impacts were staged in a National Football League (NFL) stadium by propelling helmeted 50th percentile male crash test dummies into each other or the ground at speeds and orientations representative of concussive impacts for NFL players. The tests were recorded by experienced sports film crews to obtain video coverage and quality typically available for NFL games. A videogrammetry procedure was used to track the position and rotation of the helmet throughout the relevant time interval of the head impact. Compared with rigidly mounted retroreflective marker three dimensional (3-D) motion tracking that was concurrently collected in the experiments, videogrammetry accurately calculated changes in translational and rotational velocity of the helmet using high frame rate (two cameras at 240 Hz) video (7% and 15% error, respectively). Low frame rate (2 cameras at 60 Hz) video was adequate for calculating pre-impact translational velocity but not for calculating the translational or rotational velocity change of the helmet during impact.     

Analysis of academic administrators’ attitudes: annual evaluations and factors that improve teaching

This article examines academic administrators’ attitudes towards the academic evaluation process in the US and those factors that are utilised to improve teaching. We use path regressions to examine satisfaction with evaluation procedures, as well as the direct and indirect effects of these factors on perceptions of whether the evaluation process facilitates quality instruction. With increased pressure for accountability being placed on higher education, it is important to ensure that we are meeting both public and academic expectations. The evaluation process is an important tool to ensure the university’s goals and values are articulated and that academics can be successful in their individual career paths. The problem is most research finds flaws with the current method of evaluation, and academics and academic administrators are sceptical about the process and results. We find there are environmental factors that influence academic administrators’ perceptions of academic evaluations and the ability to improve classroom instruction.     

Enzymuria pattern in early post renal transplant period: Diagnostic usefulness in graft dysfunction

Serum creatinine does not distinguish between various causes of graft dysfunction. Serial assay of proximal tubular enzymes N-Acetyl-D-glucosaminidase (NAG), Alanine aminopeptidase (AAP) and Gamma glutamyl transferase (GGT) in urine was done to assess their usefulness in distinguishing various causes of graft dysfunction. Daily serum creatinine and enzymuria were measured in 32 consecutive renal allograft recipients for first 15 postoperative days. Graft dysfunction was defined as >20% increase in serum creatinine and >100% increase in enzymuria over the baseline. The diagnosis of graft dysfunction was based upon clinical criteria, ultrasonography, cyclosporin trough level, allograft biopsy, response to anti-rejection therapy and alteration of cyclosporin dosage. Fifteen episodes of graft dysfunction were identified in 15 patients. The sensitivity and specificity of the enzymes (NAG, AAP and GGT) for predicting graft dysfunction were 87.5%, 86.9%, 88.5% and 98.2%, 98.2%, 97.9% respectively. There was a significant increase in enzymuria during acute tubular necrosis (ATN) and acute rejection episode compared to cyclosporin nephrotoxicity (p<0.01). Enzymuria assay provides a simple, reliable and noninvasive method to distinguish cyclosporin nephrotoxicity from acute tubular necrosis and acute rejection in renal allograft recipients.     

英汉语中“head（首／头）、tail（尾）”隐喻研究

隐喻是一种利用已知事物来理解未知事物的认知手段,人类以自身结构去认识世界的人体隐喻也是隐喻中的一种常见方式,而人体中首、尾也是经常被用来指代时间、空间等概念。本文通过对比英汉两种语言中head（苔／头）和tail（尾）隐喻的不同,揭示了其跨语言、跨文化的共性及个性,在认知语言学和跨文化交际研究中都具有重要意义。     

班主任工作的苦与乐

班主任是沟通学校与学生、家长的桥梁和纽带,是贯彻落实学校各项工作任务的基础。一个学校办学水平的高低,各项工作的好坏,很大程度上取决于班主任工作的优劣。好的班主任能给学校带来赞誉,而差的班主任同样会给学校带来毁誉,甚至灾难。班主任就是学校在社会上的形象大使,也是人们议论学校的焦点。做班主任尽管很辛苦,但苦中有乐。     

浅析高校新生班主任工作

大学是人生的一个转折点,大学新生在新的环境下,生活上、学习上、心理上等诸方面会产生不适应。这时需要班主任进行适时的引导,帮助学生渡过新生期的种种困惑,解决他们出现的问题。     

SIRTUIN1介导的NIH3T3成纤维细胞昼夜节律时钟基因表达抑制的光生物调节作用

背景和目的:昼夜节律是影响运动成绩的一个重要因素。研究发现,介导运动应激的肿瘤坏死因子(tumor necrosis factor,TNF)能够抑制昼夜节律时钟基因的表达。研究了低强度810nm激光(low intensity 810 nm laserir radiation,LIL)对TNF抑制效应的调节作用。材料和方法:50%马血清休克处理NIH3T3成纤维细胞2h,同步化昼夜节律时钟基因的表达后,加入10ng/mL TNF-alpha抑制它的表达,与此同时给予20min10mW/cm2的LIL照射。36h内,每隔6h检测细胞中时钟基因Clock、Bmal1、Per2、Dbp和烟酰胺腺嘌呤二核苷酸辅酶(nicotinamide adenine dinucleotide,NAD+)依赖的组蛋白去乙酰化酶1(sirtuin1,Sirt1)的mRNA的表达及胞内NAD+和其还原形式NADH的比值NAD+/NADH。结果:TNF-alpha分别在第12h和第18h抑制了Clock(P<0.05)、第18h抑制了Bmall(P<0.05)和Dbp(P<0.005)、第18h和第30h抑制了Per2(P<0.05)及...     

中小学班主任心理健康教育工作实证研究

采用自编的《中小学心理健康教育状况调查（班主任问卷）》对安徽省芜湖市4区3县260名班主任教师进行调查。结果表明,班主任教师心理健康教育培训机会少,工作开展困难重重、认为出现心理问题的学生偏多、认为任课教师在教学活动中融入心理学知识偏少。因此,应进一步提高心理健康教育意识水平;与心理健康教育教师联合工作;丰富教育途径以解决工作困难。     

“宁为鸡口,无为牛后”的语言文字浅析

"宁为鸡口,无为牛后"影响深远,而其研究尚有余地,以《读书杂志》和北大语料库为基础,从语法、异文和文化三方面进行探讨,其中,异文是重点,希望对词源考据和语言应用等有所裨益。