Reliability and effects of muscular pretension on isometric strength of older adults

There were two objectives to this study: (a) to determine the reliability of measuring isometric maximum torque (MT) and maximum rate of torque development (MRTD) of the knee extensor and flexor muscles and (b) to assess the effects of different muscular pretensions on MT and MRTD of older adults. Maximum strength of 35 untrained healthy older adults (aged 66.9?±?6.6 years; height 1.72?±?0.07 m; weight 75.2?±?9.6 kg) was measured. Strength measurement was performed with the Dr. Wolff ISO Check using a piezo-electric force transducer. MT intra-day coefficient of variation (CV) was between 3.30 and 12.40 % for both measurement sessions. Intraclass correlation coefficients (ICC) ranging from 0.71 to 0.99 showed good relative reliability. MT test–retest reliability (between sessions 1 and 2) of knee extension reached a CV between 7.10 and 9.30 % and high ICC values. The measurement of the knee flexion achieved an acceptable CV (9.40 %) at 40 % muscular pretension. MRTD was negatively influenced by muscular pretension (p <0.05). In conclusion, MT could be measured reliably over different trials using isometric strength measurement. The test–retest reliability was acceptable at knee extension with 10 to 40 % muscular pretension and with 40 % muscular pretension at knee flexion. A higher muscular pretension has no impact on MT but decreases MRTD in older adults.     

The resource-based view of diversification success: conceptual issues, methodological flaws, and future directions

After more than 20 years of empirical research, the resource-based view of the multibusiness firm has emerged as a promising paradigm for explaining diversification success—one of the most investigated research questions within the field of strategic management. However, because various dimensions of resource-relatedness, synergistic effects, and moderating influences are investigated at diverse levels of analysis, the findings are very fragmented. Our review and critical assessment of the research reveals a number of conceptual issues and methodological flaws that had already constrained heavily traditional diversification research. Consequently, we suggest promising directions for future research efforts that can put this important empirical application of the resource-based view of the firm on safer ground.     

Religiosität und politische Orientierung – Radikalisierung,Traditionalisierung oder Entkopplung?

In Germany as in other European countries the share of religious and churched persons is shrinking. The process of secularization is progressing gradually but inexorably and affects both Christian churches alike. In this contribution we examine if and how the numerical shrinkage of religious core segments affects the relation between religiosity and political attitudes. From secularization theory one can derive three partly opposing expectations. The radicalization thesis—particularly popular in the USA—assumes religious groups feel threatened by an increasingly secular society and this ties them together, radicalizes and mobilizes them. A second expectation rests on the assumption that in particular younger, economically well-off and highly educated people leave the churches. Through this process the social composition of the remaining church members changes leading not to radicalization but to traditionalization and withdrawal from politics. Finally, according to a third view it can be expected that the secularization process affects the entire society leading to a disintegration of tight religious milieus which in turn leads to a dissolution of social control and a decoupling of religiosity and political orientations. The central finding of our analyses is that—in support of our third hypothesis—religion loses its function for political attitudes and behaviors. In the German context the effect of religiosity on politics has been nearly exclusively studied with respect to voting behavior. By extending the focus to a wide range of other attitudes and behaviors and by taking a dynamic perspective this contribution thus closes an important research gap.     

Mehr als nur Überleben — Anerkennung und Selbstbehauptung

More than survive — acknoledgement and self-assertiveness. Coaching for feministic researchers The need for coaching for feminist women academics arises from the unfavourable conditions of their employment at Universities. This relates, in particular, to the conditions which are important for professional ?power“ such as the need for acknowledgement and the opportunity for assertiveness. Group coaching for women, in this case, serves to strengthen women’s belief in themselves which then becomes a resource and a basis for self-assertiveness. Solidarity and a long-term career perspective are indispensable.     

Sozialpolitik als Instrument der Geschlechtergerechtigkeit

The German welfare state supports traditionally the male breadwinner model and remunerates continuous full-time employment. Recent developments in social policy like the reform of ??Elterngeld?? (paid parental leave) and the introduction of ??Pflegezeit?? (unpaid care leave) increase the value of unpaid care work done for the family and set incentives to share care work between the partners. Thus, ??Elterngeld?? and ??Pflegezeit?? work against the gender discrimination of the German welfare state and might foster gender equity. But, the analysis shows that the steps towards gender equity are only minor. The sharing of care work, the financial autonomy of the caring parent and the reconciliation of children care and employment do not materialise sufficiently.     

Statistical mining of interesting association rules

This article utilizes stochastic ideas for reasoning about association rule mining, and provides a formal statistical view of this discipline. A simple stochastic model is proposed, based on which support and confidence are reasonable estimates for certain probabilities of the model. Statistical properties of the corresponding estimators, like moments and confidence intervals, are derived, and items and itemsets are observed for correlations. After a brief review of measures of interest of association rules, with the main focus on interestingness measures motivated by statistical principles, two new measures are described. These measures, called α- and σ-precision, respectively, rely on statistical properties of the estimators discussed before. Experimental results demonstrate the effectivity of both measures.     

Needed but Not Liked – The Impact of Labor Market Policies on Natives’ Opinions about Immigrants

This article builds on the notion that immigrants’ integration into the labor market benefits migrants and shapes natives’ opinions about immigrants. Using insights from the newest literature on labor immigration and drawing upon the literature on attitudes toward immigrants, the article explores in a multilevel design the impact that regulations in the EU member states concerning immigrants’ access to domestic labor markets have on threat perceptions and on opinions about immigrants’ economic role. It finds that labor market regulations have a positive effect on opinions about immigrants’ economic role and reduce the negative relationships between precarious labor market status and opinions about the economic role. However, a robust effect of labor market regulations on threat perceptions was not found. Our results imply that labor market incorporation rules need to be accompanied by other measures to close the gap between natives and immigrants.