充分利用多媒体辅助手段 提高大学英语教学质量

多媒体辅助手段的运用能够大大提高课堂教学效果。该文基于对北京林业大学多媒体利用情况的调查,探讨了目前该校利用多媒体辅助手段进行英语教学存在的问题和解决方案,并论证了多媒体辅助教学在实践中的价值和意义。     

创新型人才的培养与图书馆教育功能的发挥

创新型人才是具有高尚思想品德、丰富文化知识、合理知识结构、创新思维和创新能力的高素质人才。图书馆在创新型人才的培养中发挥着重要的作用 :①延伸课堂教学 ,完善创新型人才的知识结构 ;②对创新型人才实施全面的素质教育 ;③培养创新型人才的信息意识 (情报意识 )和信息能力 ;④图书馆的人文环境有利于创新型人才创新品质的培养。因此 ,图书馆应进一步加强现代化建设 ,强化其教育功能 ,以便为创新型人才的培养做出更大的贡献     

Earnings assimilation of immigrants in Norway – A reappraisal

The relative earnings growth for immigrants in Norway is computed. Unlike Hayfron (1998, this journal) we define immigrants by country of origin rather than citizenship and perform separate studies of immigrants from inside and outside the OECD region. Replicating Hayfron op.cit. we find that the earnings assimilation is considerably weaker. Further, we find that the earnings of OECD immigrants are comparable to those of natives, while Non-OECD immigrants earn considerably less than natives at the time of entry, but that their relative earnings improve gradually over time. Earnings of different immigrant cohorts converged from 1980 to 1990, indicating a non-linear rate of assimilation. Received: 7 April 2000/Accepted: 4 January 2001     

CURBSIDE RECYCLING IN THE PRESENCE OF ALTERNATIVES

We measure the extent to which curbside access affects quantity recycled. We use novel data to distinguish between new recycling and material diverted from other recycling modes. We find that the marginal impact of expanding curbside programs on total recycled quantities is small, in part because curbside programs significantly cannibalize returns from drop-off recycling centers. Failure to account for cannibalization from other modes may substantially overestimate the benefits of curbside programs. We conclude with simple cost-effectiveness comparisons. Results suggest that incremental expansion of curbside access may not be cost-effective. ( JEL Q53, Q58, H72)     

Maternal Functioning, Time, and Money: The World of Work and Welfare

Numerous studies have assessed families' employment and financial stability following welfare reform. Yet little research has addressed whether welfare and work transitions are linked with other changes in family functioning. Using a representative sample of approximately 2,000 low-income urban families from the Three-City Study, analyses assessed whether mothers' welfare and employment experiences over a two-year period following welfare reform were related to changes in family well-being. Lagged regression models controlling for family characteristics and earlier levels of functioning found that moving into employment and stable employment (of 30 hours or more per week) were linked to substantial increases in income and improvements in mothers' psychological well-being. Movements into employment also were associated with declines in financial strain and food insecurity. Sustained or initiated welfare receipt was related to relative declines in income, physical health, and psychological well-being, but also to improved access to medical care. In contrast, mothers' welfare and work experiences showed very limited relations to changes in the quality of parenting or of children's home environments. These patterns were similar for families with young children and those with adolescent children. Results suggest that parenting behaviors are more resistant to change than are maternal emotional and economic functioning.     

Maternal Welfare and Employment Experiences and Adolescent Well-Being: Do Mothers' Human Capital Characteristics Matter?

Using a representative sample of over 900 low-income urban families from the Three-City Study, analyses assessed whether maternal human capital characteristics moderate relationships between mothers' welfare and employment experiences and young adolescents' well-being. Results indicate synergistic effects whereby greater maternal education and literacy skills enhanced positive links between mothers' new or sustained employment and improvements in adolescent cognitive and psychosocial functioning. Greater human capital also enhanced the negative links between loss of maternal employment and adolescent functioning. Mothers' entrances onto welfare appeared protective for adolescents of mothers with little education but predicted decreased psychosocial functioning among teens of more educated mothers. Results suggest that maternal human capital characteristics may alter the payback of welfare and work experiences for low-income families.     

A Preliminary Investigation of Factors Associated With Job Loss Grief

This study investigated relationships among factors hypothesized as related to job loss grief. A summary grief score correlated positively with time since job loss and number of dependents, and negatively with length of notice. Perceived reemployment prospects and income loss related positively to some grief index subscales, as did the condition of living on one's own. Job duration correlated negatively with some grief responses. Implications for counseling and avenues for future research are discussed.     

“森林有害生物控制”教学改革理论与实践

作者针对“森林有害生物控制”课程的特点,将原属于“森林昆虫学”和“林木病理学”两门课程的内容全面整合;进一步改革教学方法,通过使用多媒体技术,提供翔实生动的多媒体资料,提高学生学习的兴趣;充分利用网络工具,增加学生获取信息的途径,体现学生学习的主体地位,增强学生的自学能力;通过教学活动的全程控制,提高学生学习的主动性和积极性。     

ASSESSING THE RELATIONSHIP BETWEEN SYMPTOMS OF ALLERGIC RHINOCONJUNCTIVITIS AND POLLEN COUNTS

The relationship between daily pollen counts during the peak pollen season and hay fever symptoms in known sufferers of pollen allergy was investigated in a Sydney hospital‐based study. This paper develops statistical models for both the short term (day to day) associations and the longer term relationships between these time series. Possible effects of asthma status are investigated. The analyses illustrate how different relationships between time series may be explored in a simple way by working on different time scales with suitably transformed variables.