Master'S degree programs in marital and family therapy: an evaluation of admission and program requirements*

Current legal and professional guidelines related to master's-level training programs in marriage and family therapy are reviewed. The admission and program requirements of 50 California-based programs are then evaluated in light of these standards. The data indicate that the reality of these training programs often departs significantly from the ideals and suggested standards of the field. It is recommended that the various national and state organizations interested in promoting quality marriage and family training programs collaborate with program representatives to establish more explicit and rigorous expectations for master's-level training.     

Bridging and bonding connections beyond the web: youth movements and civic engagement

Young people's participation, supported by the advent and the use of social media, seems to increase and become more definite, especially when it is linked to the local territory and its activities. In this respect, the connections the youths are able to create online go beyond the web, also developing social interactions with local communities. This article, starting from these premises, aims at investigating more deeply the debate about the civic use of the web by young people. The analysis focuses on 20 youth movements (cultural, social-collective, and environmental ones), with national/international relevance, mainly related to the web. Taking into account five main dimensions – internationalization, level of organization, participation, communication, and benefits for the social structure – the paper point outs different dynamics among the movements related to: (1) the use of the net, (2) the transfer from the online communication exchange to the local implementation of the civic actions, and (3) the involvement of the local public opinion. Moreover, the study reveals strong connections among participants, both in terms of bridging and bonding links so that the movements may be considered as a promising opportunity to strengthen civicness and foster social capital.     

粪肥纤维单胞菌木质素 11A基因野生型与点突变子底物结合特性研究(英文)

本文报道 ,应用点突变技术获得的粪肥纤维单胞菌 (Cellulomonasfimi)木质素酶 11A(Xyn11A)基因的3个点突变子 ,即R2 62G ,R573G和R2 62G R573G ,表达产物结合底物特性的测定结果。试验表明 ,R2 62G R573GXyn11A与野生型Xyn11A基因表达产物结合底物的特性明显不同 ,表现为前者不与木质素结合而与纤维素结合 ,后者与纤维素和木质素均结合 ,但与木质素结合能力更强 ,与野生型Xyn11A一样 ,R2 62GXYN11A和R573GXyn11A也能与纤维素和木质素两者结合 ,但与纤维素的结合力更强 ,而与木质素结合力弱。用纤维素作为底物测定Xyn11A和R2 62G ,R573G和R2 62G R573GXyn11A的Kr值分别为 0 .6,1.1,1.1和 1.9L g。     

From service to social control: Implications of welfare reform for professional practice in the United States

In response to the explosive growth and the changing demographic composition of public welfare recipients, this program has undergone four major reforms over the last three decades: the 1962 'Service' amendments, the 1967 Work Incentive program (WIN), the Family Support Act of 1988, and the 1996 program of Temporary Assistance to Needy Families (TANF). These reforms have had a profound impact not only on the scope and purpose of public assistance to needy families, but also on the nature of professional social work practice in this area of public social service. An analysis of the major welfare reforms over the last 35 years reveals how the national entitlement to income maintenance and social services has receded, local responsibility and private delivery of service have increased, and emphases on service functions have shifted from rehabilitative social casework/counselling to work-oriented training, job search activities, and local employment. The provision of public assistance has been transformed from a federal entitlement based on needs to a budget-driven-time-limited benefit enveloped by incentives and sanctions, with welfare clients increasingly subject to mandatory participation in work-related activities. This movement from welfare to workfare has infused the professional role of social workers with a steadily expanding function of social control, which is unlikely to encourage professional participation in the public social services.     

The role of exercise on the innate immunity of the elderly

The increased life span in human population has shown that some diseases, as infections, cancer and autoimmune phenomena, occur more frequently in the elderly than in the younger. We describe the ageing process involving the innate immune system and the improvement given by moderate physical activity. In addition, we discuss the altered neutrophil granulocytes function, the role of macrophages and natural killer cells, besides the influence of cytokines and secretory IgA. The acquired information help us to explain how these changes could favor the onset of diseases in the elderly and how they may boost their immune function.     

New algorithms for k-center and extensions

The problem of interest is covering a given point set with homothetic copies of several convex containers C ₁,…,C _k , while the objective is to minimize the maximum over the dilatation factors. Such k-containment problems arise in various applications, e.g. in facility location, shape fitting, data classification or clustering. So far most attention has been paid to the special case of the Euclidean k-center problem, where all containers C _i are Euclidean unit balls. Recent developments based on so-called core-sets enable not only better theoretical bounds in the running time of approximation algorithms but also improvements in practically solvable input sizes. Here, we present some new geometric inequalities and a Mixed-Integer-Convex-Programming formulation. Both are used in a very effective branch-and-bound routine which not only improves on best known running times in the Euclidean case but also handles general and even different containers among the C _i .     

Young urban adults' heterosexual risk encounters and perceived risk and safety: a structured diary study

Using diary methods, the current study explored characteristics of young adults' sexual risk interactions over a two-week period and the associations between perceived risk and safety with regard to these sexual risk behaviors. We screened all participants to ensure a moderate to high scores on an HIV knowledge measure. Men (n = 44) and women ( n = 48) enrolled at an inner-city college collected diary data, generating reports of 440 sexual occasions over a 2-week period (1,278 person-days). Despite participation in sexual risk activities, including highly inconsistent condom use during intercourse, participants uniformly reported high safety and little to no risk. Only women's perceptions of safety (not risk) were associated with condom use, men's perceptions of both safety and risk were unrelated. Ratings of safety and risk appeared to operate independently for the most part. Sex with new partners and new sexual activity were associated with both judgments of greater risk and lower safety were associated for men only. These results add to the growing evidence that young people fail to integrate fully their general knowledge regarding HIV risk into their personal interactions. This study has implications for the development of cognitive models around sexual decision-making for young adults at risk for HIV and may provide insight into the contextual features of sexual interactions associated with young people's perceptions of risk and safety.