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The time doctoral students expect to take to complete their degree is investigated in a model which stresses the effects of economic factors. The model also accounts for the interdependency among such variables as employment hours, study hours, household income, and part-time study. We find that field of study, amount of borrowing, household income, and study hours have direct effects on expected time to degree. Indirect effects also occur from employment hours and the amount of fellowship, scholarship, or grant aid. When the sample is separated into foreign and U.S. students, we find that U.S. students underestimate their time to degree. Also, household incomes are higher for U.S. students and increase the time to degree, while the opposite is true for foreign students. Teaching assistantships increase the time to degree for foreign students while research assistantships reduce it.  相似文献   
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Objective

Many children in the US who are court-ordered to live in out-of-home care are placed with kinship caregivers. Few studies have examined the impact of living with kin on child well-being. This study examined the relationship between length of time living with kin and indices of adolescent well-being in a cohort of children who were initially court-ordered into out-of-home care.

Methods

Prospective cohort design with 148 youth, ages 7-12, who entered out-of-home care between May, 1990, and October, 1991. Seventy-five percent of those interviewed at T1 (6 months following placement) were interviewed at T2 (5 years later).

Results

Bivariate analyses did not demonstrate significant relationships between length of time living with kin and the outcome variables. In multivariate analyses, longer length of time living with kin was related to: (1) greater involvement in risk behaviors including: delinquency (β = .22, p < .05), sexual risk behaviors (β = .31, p < .05), substance use (β = .26, p < .05), and total risk behaviors (β = .27, p < .05), and (2) poorer life-course outcomes including: Tickets/Arrests (OR = 1.4, p < .05) and lower grades (β = −.24, p < .05). Time living with kin was not related to total competence, or self-destructive, internalizing, externalizing, or total behavior problems. There were trends (p < .10) for time living with kin to predict greater trauma symptomatology (β = .17) and suspensions (OR = 1.1).

Conclusions

There were no significant bivariate findings. The multivariate findings suggested a pattern of poorer functioning for youth who spent more time living with kin. No differences were found in current symptomatology.

Practice implications

Although findings from a single study should not dictate changes in practice or policy, the current study's findings do suggest that the field needs to conduct more methodologically sophisticated research on the impact of kinship care.  相似文献   
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OBJECTIVE: Few studies have examined the impact of placement in foster care prospectively to determine what early responses might predict later functioning. The current study examined protective and vulnerability factors in a longitudinal study of youth placed in foster care. METHODOLOGY: A cohort of 214 ethnically-diverse youth, ages 7-12, who entered foster care between May 1990 and October 1991 were recruited for the Time 1 study if they remained in foster care for at least 5 months. For the Time 1 study, youth and their caregivers were interviewed and assessed approximately 6 months following their initial placement. Six years later, as adolescents, the youth were re-interviewed regarding their involvement in four domains of risk behavior. RESULTS: Bivariate analyses indicated that several Time 1 control variables (e.g., age, ethnicity, type of maltreatment, behavior problems) and Time 1 psychosocial predictor variables (i.e., dimensions of social support and self-perception) were related to the Time 2 risk behavior outcomes. Regression analyses with all variables accounted for between 33 and 46% of the variance, with the psychosocial predictor variables, as a group, significant over and above the control variables. CONCLUSIONS: The results suggest that there are some modifiable protective and vulnerability factors present shortly after maltreated youth are placed in foster care that predict their engagement in adolescent risk behaviors 6 years later.  相似文献   
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Radiation induced brain damage is associated with impairment of mitochondrial functions, variations in the level of neurotransmitters, and oxidative stress. Mitochondrial function is closely linked to the level of neurotransmitters since the precursors are supplied by the Kreb’s cycle intermediates. The objective of this study was to evaluate the influence of pantothenic acid, an essential component in the synthesis of Coenzyme A (CoA), on the activity of the Krebs cycle enzymes, isocitrate dehydrogenase (IDH), α-ketoglutarate dehydrogenase (α-KGDH), and succinate dehydrogenase (SDH); the level of aspartic, glutamic and GABA; the activity of transaminases, and oxidative stress, in the cerebrum of γ-irradiated rats. Pantothenic acid (26 mg/Kg) was orally administered to the rats, 2 h after irradiation and during the following 5 days. Animals were sacrificed the 7th day post-irradiation. The exposure of male albino rats to γ-rays (5 Gy) has triggered oxidative stress notified by a significant elevation in the level of malondialdehyde (MDA), an end product of lipid peroxidation, associated to a significant decrease in the content of phospholipids, and the antioxidant compound glutathione (GSH). The activity of IDH, α-KGDH, and SDH, has significantly decreased, while the level of aspartic, glutamic and GABA has significantly increased. In parallel to these changes, the activity of alanine and aspartate transaminase has significantly increased, compared to their values in the control rats. Pantothenic acid treatment, has significantly attenuated oxidative stress; enhanced the activity of IDH, α-KGDH, and SDH; minimized the increase in the level of amino acids and the activity of transaminases, compared to their values in the cerebrum of irradiated rats. In conclusion, pantothenic acid could improve the level of neurotransmitters amino acids, which depends on the enzymatic activities of Krebs cycle and linked to oxidative stress.  相似文献   
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Research shows that youth in foster care experience poor academic performance and disciplinary actions in school more frequently than do non-foster care youth. The purpose of this cross-sectional study was to further examine youth in foster care and the relationship between individual/intrapersonal factors (future orientation and school connectedness) and exosystem factors (number of placement and school moves) and academic performance (grades) and disciplinary referrals among 363 youth (9–11 years of age; males = 52.9%). Controlling for key variables, hierarchical linear regression analysis was utilized to understand how well students' school connectedness, future outlook, number of placement changes, and number of school moves predicted academic and disciplinary outcomes. Beyond the variance explained by control variables, school connectedness made a significant contribution to this model. Results are discussed in the context of implementing interventions that foster school connectedness among this vulnerable population.  相似文献   
8.
Students admitted to more than one institution of higher education face one of the most difficult decisions of their lives. The determinants of these enrollment decisions are crucially important to the yield of qualified students from the number admitted to colleges and universities. This paper specifies an empirical model of the enrollment decision for students admitted both to Rutgers University and to at least one alternate college. Our estimates of the parameters of the model with a binary choice multiple regression equation show that students base their enrollment decision on the relative quality of the schools, their own abilities and family resources, and the net costs of the schools. The results are relevant to university tuition and financial aid policies. The general methodology is replicable by other institutions seeking information on the determinants of the enrollment decision.  相似文献   
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