Fathers,mothers, and adolescents: Gender-based differences in parental roles during adolescence

This study examined the involvement and satisfaction of adolescents with their fathers and mothers. Possible age and sex differences were investigated for three components of involvement: proportion of time spent with fathers and mothers, type of activities engaged in, and degree of satisfaction with those activities. Telephone interviews were used to obtain information about previous day's activities from 61 adolescents in grades 6–12. For each activity, data were obtained on duration, who else was present, and satisfaction. Results indicated that adolescents spent a greater proportion of time in leisure than in work with fathers, and equal time in work and in leisure with mothers. In general, adolescents were as satisfied with activities with their fathers as with their mothers. Adolescents enjoyed working with fathers more than mothers, however. The results demonstrate that activity satisfaction varies as a function of what activities adolescents engage in and who is present.Received his Ph.D. from Michigan State University. Major research interests are in parent-adolescent relations.Received his Ph.D. from Georgia State University. Major research interests are in early peer relations and mother-child interactions.     

Localism in environmental policy: New insights from an old case

Determining the appropriate balance between local and national interests is an enduring issue in public and environmental policy. Study of this issue, however, has been impeded by the theory of agency capture. This paper demonstrates the limitations of capture theory with respect to localism and provides a new perspective on the issue by revisiting the case of the U.S. Division of Grazing, a common example in the literature of a captured agency. Until now, the over-extension of capture theory to this case has obscured the division's extensive efforts to balance local and federal influence over range policy and prevent domination by large private interests. At the center of this struggle was a prominent legal dispute over local control involving Colorado sheepherder Joseph Livingston. As a detailed debate over political representation and the merits of localism, the Livingston case holds important lessons for modern community-based conservation efforts seeking similar policy goals.     

全球化及其对公共管理中领导资格的影响

全球化促进了公共管理的有效性和行政机构的国际化 ,同时对公共管理中的领导资格产生了影响。因此 ,领导者要不断学习新知识和新技能 ,接受新的挑战。领导模式应该灵活多变 ,领导者的培训也不应该千篇一律 ,领导者应该在行动中学习。     

Comparison of gasolines using gas chromatography-mass spectrometry and target ion response

Gas chromatography-mass spectrometry was used to compare gasoline samples obtained from different sources based on the difference in amounts of certain components found in the headspace of gasoline using target response data. Many suspected arson cases involve comparing an ignitable liquid extracted from fire debris to a liquid found in a suspect's possession to determine if they could have had a common source. Various component ratios are proposed for determining if an unevaporated gasoline sample could have originated from the same source as an evaporated gasoline extracted from fire debris. Fifty and 75% evaporated gasoline samples were both found to contain similar ratios of certain components when compared with its unevaporated source gasoline. The results of the comparisons in this study demonstrate that for cases involving gasoline that has been evaporated up to 50% and extracted from pine, it is possible to eliminate comparison samples as originating from the same source. The results of the 75% comparisons suggest it may be possible to apply the same type of comparison to cases involving 75% evaporated gasoline.     

Identification of ascorbic acid and its degradation products in black powder substitutes

Low explosives such as smokeless powder, black powder, and black powder substitutes have been used in illicit pipe bombings throughout the United States. Some of the newer black powder substitutes are formulated with ascorbic acid, which gradually decomposes as the powder ages, making it difficult if not impossible for the forensic chemist to identify it by traditional bulk techniques. A sensitive method for the identification of residual levels of ascorbic acid in black powder substitutes is presented. Powder samples are extracted with a mixture of acetonitrile and bis(trimethylsilyl)acetamide (BSA), which converts carboxylic acid and alcohol functional groups to trimethylsilyl esters and ethers, respectively. Samples are then analyzed by gas chromatography-mass spectrometry (GC-MS). Results have shown that trace amounts of ascorbic acid can be identified at detection limits that are well below those for traditional bulk techniques. Degradation products for ascorbic acid (hydroxylated carboxylic acids, furanones, and lactones) can also be detected.     

Age segregation of adolescents in and out of school

In a naturalistic study of age segregation during adolescence, 403 adolescents making up 153 separate groups were observed in three high schools and seven out-of-school settings. Age segregation was extensive, especially in school, among older adolescents in same-sex groups of friends. More mixed-age association was observed out of school among younger adolescents who were in mixed-sex groups containing relatives. Adolescents were most often observed with friends who were other adolescents, next with adults, and least frequently observed with children. Parents, particularly fathers, were rarely present. It was suggested that age segregation during adolescence is the result of a lack of contact with relatives.Received his Ph.D. from Michigan State University in 1974. Major research interest is parent-adolescent relations.Major research interests are adolescence and clinical psychology.