浅谈软件蓝领与高等技术教育

本通过对印度和日本软件产业的分析，对照我国软件产业的现状，初步探讨了软件开发工程化的具体内容和实现途径，以及与之相配套的人力结构和人才的知识结构、能力结构，并对职业技术学院培养的人才规格，能力结构及实现方法提出了一些见解。     

RNAi的革命

通过实验手段向细胞内导入长的双链RNA或者转基因可以产生一些短片段的双链RNA,这些短片段的双链RNA可以通过促使特定基因的mRNA降解来高效、特异地阻断体内特定基因的表达,使细胞出现特定基因缺失的表型,称为RNA干扰(RNA interference,RNAi)。SiRNA(small interference RNA)就是这种短片段双链RNA分子,能够以序列同源互补的mRNA为靶目标,降解特定的mRNA。基本上所有的生物体内也都存在一种内源的小分子RNA,为单链RNA,由基因组转录生成,但是不编码蛋白质,它们的功能在于调节mRNA的翻译,称为miRNA,是由具有发夹结构的前体剪切产生的。RNAi的发现具有划时代的意义,它不仅揭示了细胞内基因沉默的机制,而且有望成为后基因组时代基因功能分析的有力工具,极大地促进了人类揭示生命奥秘的进程。     

用Excel绘制物理图像

介绍了用Excel软件绘制物理图像的方法。     

Risk factors for infant maltreatment: a population-based study

CONTEXT: Of the approximately 900,000 children who were determined to be victims of abuse or neglect by US child protective services in 2002, the birth-to-3 age group had the highest rate of victimization (1.6%) and children younger than 1 accounted for the largest percentage of victims (9.6%). OBJECTIVE: To identify perinatal and sociodemographic risk factors associated with maltreatment of infants up to 1 year of age. DESIGN AND SETTING: Observational cohort study. PARTICIPANTS: 189,055 children born in 1996 in Florida. MAIN OUTCOME MEASURE: Infant maltreatment, defined as a verified report of abuse, neglect, or threatened harm that occurred between day 3 of life and 1 year. RESULTS: 1,602 children (.85%) of the 1996 birth cohort had verified instances of maltreatment by age 1. Of 15 perinatal and sociodemographic variables studied, 11 were found to be significantly related to infant maltreatment. Five factors had adjusted relative risks (RR) of two or greater: Mother smoked during pregnancy (RR 2.8); more than two siblings (RR 2.7); Medicaid beneficiary (RR 2.1); unmarried marital status (RR 2.0); low birth weight infant (RR 2.0). Infants who had four of these five risk factors had a maltreatment rate seven times higher than the population average. CONCLUSIONS: Data on nearly all risk factors found to be significantly associated with infant maltreatment are available on the birth certificate. Such information can be incorporated into a population-based risk-assessment tool that could identify subpopulations at highest risk for infant maltreatment. Because resources are limited, these groups should be given priority for enrollment in child abuse prevention programs.     

21世纪化学的新概念

作为新世纪的化学教师应及时了解本学科的新概念及新发展。本从化学的定义、研究对象、研究内容及研究方法等方面介绍了21世纪化学的新概念。     

试论中学与大学德育的有效对接

“大一新生综合症”出现的深层次原因是大学与中学德育的脱节,为此,要从教育观念、教育管理、教育目标、教育内容、培养途径等方面实现中学与大学德育的有效对接,以提高我国人才培养质量。     

Determination of Trace Molybdenum（VI） by Oscillographic Potentiometric Catalyzing Kinetic Method of Simplex Optimization

1　Introduction　Ahugeamountofliteratureexistsonthestudyofi dentifyingtracemetalionsbymeansofspectropho tometry[1 3] ,fluorimetry[4 6 ] aswellas polarogra phy[7 9] ,whichhaveactiononlocatingtheendpointoftheindicatingreaction .Howeverbothspectropho tometryandfluorimetryareeasytobeinterferedbycolororprecipitation ,whilepolarographyhasanissueofmercurypollution .Thecatalyzingkineticanalysishasthecharacteristicsofhighsensitivityandspeedi ness.Oscillographicpotentiometryisasimpleintu itionisticanal…     

中学英语教学实施素质教育的关键

将素质教育与英语教学有机结合 ,改进、提高外语教学水平是我省中学英语教学的重要课题。教师是关键 ,只有教师改变教学观念 ,提高自身素质 ,才能提高教学质量 ,为国家培养出高素质的人才     

从相对论角度分析电磁学基本定律

应用相对论理论，安培定律可通过库仑定理推出，感生电动势和动生电动势可以相互转化，在此意义上磁学基本定律可进一步统一到静电学定律之中。     

日美俄基础教育学习负担改革动向及特征

学生学习负担的轻重问题一直是全球基础教育改革关注的焦点之一。日本、美国、俄罗斯三国基础教育学生学习负担改革一直呈现结合本国学生学习负担轻重实际国情,力求实现学习负担轻重动态平衡的鲜明特征,从中折射出学生学习负担改革的国际广泛性的客观规律。其启示为:我国基础教育学习负担改革应结合本国学习负担轻重实际国情,力求实现轻重动态平衡;把握学习负担国际广泛性的客观规律,借鉴学习负担改革的国际经验。