The inheritance of behavioral wildness in house mice (Mus musculus L.)

Fourteen behavioral measures were ranked according to their ability to differentiate performances of a wild population of mice from three domestic inbred strains. These “wildness” rankings were then analyzed for their ability to predict genetic and Genotype by Environment interactions. Genetic parameters were derived from analysis of three inbred domestic strains and their three hybrid crosses via the diallel technique of genetic analysis. Genotype by Environment interactions were assessed both as mean differences in stock performances resulting from rearing in a laboratory vs naturalistic environment and as differences in environmental variability within stock genotypes. Behavioral characters ranking high on “wildness” failed to demonstrate any unitary pattern of Genotype by Environment interactions. The diallel genetic analysis revealed many examples of additive variation but relatively few examples of dominant variation. An extremely wide range of interactions occurred between genotype and rearing environments, with “wildness” and “developmental homeostasis” concepts both failing to account for all the observed interactions.     

论自组织理论与大学课堂教学模式改革

根据教学理论与自组织理论,用文献法和案例研究法,研究了传统讲授式课堂教学系统的落后问题,并联系现实,提出了课堂教学系统的复杂性及其具有自组织特点的观点,希望可以对大学课堂教学模式的改革提供建议。     

《新员工培训专题》课件的设计与开发

企业通过网络远程培训系统对新员工进行培训是信息时代的迫切需求。本文结合具体的多媒体网络课件—《新员工培训专题》的研制,从课件的内容设计、导航与界面设计、媒体设计等方面分析了此课件的特点,探讨了多媒体网络课件的设计与开发。     

Occupational and educational aspirations and attainment of young adults with and without LD 2 years after high school completion

A national longitudinal database was used to compare the aspirations and attainment of individuals with and without learning disabilities (LD) 2 years after high school completion. Analyses revealed that individuals with LD reported lower graduation rates, were more likely to aspire to moderate- (men) or low-prestige (women) occupations, and were more likely to be employed and less likely to be enrolled in some type of postsecondary education program than their nondisabled peers. High educational aspirations in Grade 12 and successful completion of an academic or college-prep high school program were equally important in predicting 2-year postsecondary status for adolescents enrolled in postsecondary education regardless of disability status. However, depending on disability status, different predictors were identified for individuals who were either employed or out of the workforce. These results point to a continued need for transition planning and support for young adults with LD and suggest ways in which professionals can anticipate and adjust for identified differences in aspirations and postsecondary attainment.     

无公害蔬菜生产技术规程的探讨

根据国家绿色食品标准,无公害蔬菜生产必须具备4个基本条件:第一,生产基地无污染;第二,以施用有机肥料为主;第三,合理利用农业栽培措施;第四,禁止使用高毒高残留农药,积极合理使用农业技术、物理、生物手段及生物源农药防治病虫害.