PBL教学模式在内科学教学的应用

目的探讨PBL教学模式在内科教学中的应用,以提高本院内科学教学质量,培养适应现代社会的医学人才.方法将5年制临床医学本科生90名随机分为两组,采用PBL（Problem-based learning,以问题为基础的学习）教学为试验组（n=4 5）,采用LBL（Lecture-based learning,以授课为基础的学习）传统教学为对照组（n=4 5）,比较分析两种教学模式的考核成绩,并通过问卷调查了解学生对PBL与LBL两种教学模式的意见及接受程度.结果PBL组与LBL组相比,在基础理论客观题考试中,两组学生成绩无显著差异,在病例分析主观题考试中,PBL组学生的考试成绩明显优于LBL组.结论 PBL教学模式相对LBL传统教学模式有其明显优势,提高了学生积极性和主观能动性,提升了学生分析临床实际问题的能力,有助于内科教学质量的提高.     

“我”是谁——从维特根斯坦的角度看

我的神秘在于:无所不在又无处可寻.早期和中期的维特根斯坦,基于先验的或现象主义的理由,通过消除我来消除这一神秘.后期(包括中后期)的维特根斯坦则认为,我是无法消除的;虽然我们可以从语言使用的角度知道我是谁,却无法知道我如何指向了我,也不能知道我是谁.维特根斯坦的相关说法可以合理地看成是康德相关论述的语言学继续.     

The redistributive equity of affirmative action: Exploring the role of race,socioeconomic status,and gender in college admissions

This paper contributes to research on affirmative action by examining issues of equity in the context of racial quotas in Brazil. We study the experience of the University of Brasilia, which established racial quotas in 2004 reserving 20% of available admissions slots for students who self-identified as black. Based on university admissions data and a student survey conducted by the authors, we find evidence that race, socioeconomic status, and gender were considerable barriers to college attendance and achievement. For example, first-difference regressions involving pairs of siblings indicate that black identity and gender had a negative effect on entrance exam scores. Moreover, we compare displaced and displacing applicants and find that racial quotas helped promote equity to some extent. Nevertheless, the scale and scope of redistribution were highly limited, and the vast majority of Brazilians had little chance of attending college, suggesting that more still needs to be done.     

组态软件实时数据库系统研究及设计

利用Windows的DLL(动态连接库)和全局共享内存技术来建立系统实时数据库的设计思想,采取传统数据库系统、文件系统和内存数据库系统兼用,利用多种存储介质来构造系统的实时数据库系统,并通过给用户提供一套接口标准——实时数据库系统接口,来实现I/O驱动程序与用户程序和实时数据库系统间的高速数据传递。     

论高校人力资源管理专业复合型师资建设

人力资源管理专业复合型人才培养需要复合型师资,复合型师资建设是高校人力资源管理专业教育发展的重要途径。人力资源管理专业复合型师资的素质包括多学科融合的知识,理论讲授与实践操作相辅相成的能力、教育工作者与企业管理者兼得的态度。高校可以通过不拘一格选用专业教师,鼓励教师向复合型教师发展、优化师资整体结构三个途径建设人力资源管理专业复合型师资。     

Pennies from heaven? Using exogenous tax variation to identify effects of school resources on pupil achievement

Evidence on the effectiveness of school inputs remains inconclusive, partly due to the challenge of identification as families sort themselves into school districts and resources are potentially allocated to compensate (or reinforce) differences in pupil abilities. Using variation in school resources induced by the location of waterfalls in Norway, we examine the effect of school expenditures on pupil performance at age 16. Higher school expenditures, triggered by higher revenues from local taxes on hydropower plants, have a significantly positive effect on pupil performance. This positive IV estimate contrasts a zero effect based on least squares. A downward biased estimate using a standard cross section estimator is expected in a context of compensating resource allocation across educational units.     

人工锌指核酸酶的电子设计与结构模拟

以电子设计用于猪的多位点基因打靶的人工锌指核酸酶为例,探索如何电子设计优化理想的人工锌指核酸酶,以减少人工锌指核酸酶的毒性。采用OPEN电子设计方法,生物信息学方法的预测分析ZFP的立体结构,设计优化合适的连接体和间隔体组合,并通过突变优化Fok I异源二聚体。采用OPEN法设计三指ZF序列,并连接为ZFP序列,设计出长度为6 bp且富含AT碱基的spacer,加上长度为4个氨基酸残基的inter-domain linker,连接FokⅠ切割结构域双突变子异源二聚体,并通过各种软件工具对ZFN的空间结构进行模拟预测,所设计得到的ZFN的有效率超过50%。探索获得电子设计理想ZFN的方案,即特异性结合DNA的锌指蛋白、最佳的linker和spacer的长度与组合以及优化的特异性切割的Fok I异源二聚体切割结构域。     

浅析彩电芯片的工作条件与故障检测

近几年,随着电子技术的发展,很多新型彩色电视机都采用了I2C总线技术和新的电路,给电视机维修带来新的问题。本文通过一些维修实例和对一些新知识的理解,进一步浅析彩电微处理器(CPU)正常工作的条件。     

Comparing teacher salaries: Insights from the U.S. census

Teachers are more likely to be found in rural communities and low-wage metropolitan areas than are college-educated workers in other occupations. This analysis explores the extent to which the geographic distribution of teachers explains the relatively low average wage found in other studies. The analysis suggests that excluding geographic indicators from the analysis downwardly biases estimates of relative teacher wages. One important implication of these findings is that researchers should pay attention to geographic wage variations when making earnings comparisons between teaching and other occupations.