未来气候变化对鄱阳湖区土地利用变化的影响评估

为了评估未来气候变化可能对鄱阳湖区土地利用变化产生的影响,本文根据IPCC的建议,利用新近建立的基于主体的土地利用变化模拟模型,详细分析了4种气候变化情景下鄱阳湖区1985-2035年的土地利用变化过程。这4种气候变化情景分别为A1B(经济高速增长模式)、A2(区域经济多样化增长模式)、B1(引进更多清洁能源的经济增长模式)和情景4(无气候变化模式)。在这些气候变化情景中,由于耕地的农业生产潜力差异显著,农户主体的收入和他们对土地利用方式的决策也发生了相应的改变。通过对这一过程的模拟和结果分析,发现气候变化可能有利于鄱阳湖区土地利用变化向着环境友好的方向自我调整。与A1B和A2两种气候变化情景相比,B1情景对土地利用变化的影响更具环境友好性。     

The influences of roommate assignments upon students' maturity

One hundred ten entering freshmen were randomly assigned to one of three experimental groups representing three types of roommate assignments in the residential halls. The three types of assignments included the pairing of two high-maturity students, a high- and a low-maturity student, or two low-maturity students. A pretest measure of maturity from Heath's Perceived Self Questionnaire (PSQ) was used to determine high or low maturity. About 90% of the sample was retested with the PSQ after one semester to study mean differences in maturity among the three experimental groups and between the initial status of high or low maturity after controlling for pretest maturity scores. Results showed that the maturity of one's roommate does have an impact on that student's degree of Symbolism, that is, on the student's awareness and insight of his or her values and experiences and an increased ability to express those values and experiences symbolically.