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101.
A stochastic model is proposed for social networks in which the actors in a network are partitioned into subgroups called blocks. The model provides a stochastic generalization of the blockmodel. Estimation techniques are developed for the special case of a single relation social network, with blocks specified a priori. An extension of the model allows for tendencies toward reciprocation of ties beyond those explained by the partition. The extended model provides a one degree-of-freedom test of the model. A numerical example from the social network literature is used to illustrate the methods. 相似文献
102.
Kathryn Schellenberg Ph.D. candidate 《The American Sociologist》1987,18(1):74-78
The current academic orientation of graduate education in sociology poses a number of barriers in preparing students for applied
careers. As a case in point, a former housing analyst discusses problems with the emphases of graduate training versus the
realities of a career in applied housing research. Issues discussed include the importance of an in-depth knowledge of the
applied area, the need for broad sociological scope as opposed to substantive and theoretical specialization and statistical/methodological
skills. To more closely mesh educational experience with the demands of the applied workplace, graduate programs might offer
a variety of options within a broadly defined applied track, expand opportunities for students to gain applied experience
and recruit faculty members from an applied background.
specializing in social organization and demography. She currently is working on a dissertation that examines the implications
of computer technology for workplace democracy. 相似文献
103.
The potential to foster successfully starts with developing and supporting competency in 12 domains: providing a safe and secure environment, providing a nurturing environment, promoting educational attainment and success, meeting physical and mental healthcare needs, promoting social and emotional development, supporting diversity and children's cultural needs, supporting permanency planning, managing ambiguity and loss for the foster child and family, growing as a foster parent, managing the demands of fostering on personal and familial well-being, supporting relationships between children and their families, and working as a team member. This article describes each domain and reviews relevant research to help guide the assessment of practicing and future foster parents. 相似文献
104.
White BP Becker-Blease KA Grace-Bishop K 《Journal of American college health : J of ACH》2006,54(5):261-268
In this study, the authors investigated the characteristics of use, misuse, and abuse of stimulant medication (primarily methylphenidate and variants) among students at a northeastern US university. Researchers sent an invitation to take an Internet survey to student e-mail addresses and passed 150 paper surveys in undergraduate classes, analyzing 1,025 (975 electronically) returned surveys. Sixteen percent of respondents reported abusing or misusing stimulant medication. Ninety-six percent of respondents who specified a medication preferred to abuse or misuse Ritalin. Men and women reported similar use patterns. Most respondents who abused or misused stimulant medication swallowed pills; 40% used intranasally. Reasons for abusing or misusing stimulant medication included improving attention, partying, reducing hyperactivity, and improving grades. Consistent with previous studies, results suggest that abuse of stimulant medication is a concern on college campuses. The results point to various reasons for and methods of abusing and misusing stimulant medication that may direct future research, prevention, and intervention. 相似文献
105.
A heated debate about battered women who kill abusive male partners started in the 1970s. In this study, we tracked the public discourse on battered women who kill by coding 250 newspaper articles published between 1978 and 2002. Using four typifying models, we found that leading explanations for why battered women kill medicalized then criminalized their actions; they were mad then bad. We also found that reporters used quotes from claims makers supporting conventional or medical typifications of battered women to a much greater degree than statements from alternative, feminist sources. In conclusion, simplified, sensational and conventional understandings of crime causation drove the social construction of “the battered woman who kills”. She may be mad or bad, but rarely has she been portrayed as reasonable. Suggestions for promoting feminist narrative in the media are also provided. 相似文献
106.
P. J. Avery & D. A. Henderson 《Journal of the Royal Statistical Society. Series C, Applied statistics》1999,48(1):53-61
Discrete state series such as DNA sequences can often be modelled by Markov chains. The analysis of such series is discussed in the context of log-linear models. The data produce contingency tables with similar margins due to the dependence of the observations. However, despite the unusual structure of the tables, the analysis is equivalent to that for data from multinomial sampling. The reason why the standard number of degrees of freedom is correct is explained by using theoretical arguments and the asymptotic distribution of the deviance is verified empirically. Problems involved with fitting high order Markov chain models, such as reduced power and computational expense, are also discussed. 相似文献
107.
Reconfiguration of the supply chain network from time to time is essential for businesses to retain their competitive edge. This paper presents a methodology for reconfiguration of an existing supply chain network. The methodology is characterized by two decision levels. In the first level, the current network performance is evaluated and efficient practices are identified. In the next level, a model that incorporates efficient practices is developed to reconfigure the network. This integrated methodology allows for decision maker (DM) input throughout the process. The methodology has been implemented and tested in the reconfiguration of an outbound petroleum supply chain network for CountryMark Cooperative, Inc. In this case study, Data Envelopment Analysis (DEA) is used to analyze current operations and an integer programming (IP) model that incorporates efficiency metrics is developed for selection of distribution facilities and allocation of resources to the facilities. Use of this methodology can lead to improved operations and reduced operating expenses. 相似文献
108.
Because of dramatic levels of economic volatility and massive changes in welfare policies, scholars in this decade worried anew about whether our official poverty measure, adopted in the 1960s, is adequate. Poverty's causes continued to be debated, with demographic factors often pitted against policy and maternal employment changes. Some scholars focused on events that trigger spirals into poverty or poverty exits. The literature on consequences of poverty featured new techniques for identifying underlying processes and mechanisms. Researchers also explored “neighborhood effects” and focused on poverty deconcentration efforts. Finally, scholars produced a voluminous literature on the efforts to reform welfare and their subsequent effects. 相似文献
109.
This study examines the role of individual- and family-level factors in predicting the length of shelter stays for homeless families. Interviews were conducted with all families exiting one of six emergency family shelters in Worcester, Massachusetts, between November 2006, and November 2007. Analyses, using an ordinary least squares regression model, find that families with a positive alcohol or drug screen in the year prior stay 85 days longer than those without a positive screen; families leaving shelter with a housing subsidy stay 66 days longer than those leaving without a subsidy. Demographic factors, education, employment, health, and mental health are not found to predict shelter stay duration. Consistent with prior research, housing resources relate to families' time in shelter; with the exception of a positive substance abuse screen, individual-level problems are not related to their time in shelter. Efforts to expand these resources at the local, state, and national levels are a high priority. 相似文献
110.
This article addresses what, if any, psychotherapeutic interventions should be provided to meet the emotional and clinical needs of alleged child victims of sexual abuse while they await judicial determinations from the family, dependency, or criminal courts. The discussion emphasizes that to minimize iatrogenic outcomes, professionals involved in sexual abuse allegation cases should carefully establish and maintain professional role boundaries and take on only one role in a case. Professional roles may include an investigative forensic interviewer, court appointed forensic evaluator, and therapist. Special attention is given to complex issues that arise in child custody cases with allegations of child sexual abuse in family court. 相似文献