Adaptive Test for Testing the Difference in Survival Distributions

An adaptive test is proposed for the problem of testing the difference in survival distributions when the shape of the hazard ratio is unknown, hence the efficient test is unknown. The proposed adaptive test selects a test statistic from a finite set of the weighted logrank statistics T on the basis of the estimates of the efficiencies of the tests in T for given data. The efficiency estimator uses the length of the test based nonparametric confidence interval for the shift in a time transformed shift model. The suggested adaptive test is shown to be asymptotically efficient among the tests in T under the time transformed shift model and conditions commonly used in survival analysis. Simulations demonstrate that the adaptive test enjoys good small sample properties and in most situations is more powerful than the test using the maximum of the tests in T.     

A Structural Analysis of the Effectiveness of Buying Firms' Strategies to Improve Supplier Performance

Many manufacturing firms have increased the amount of component parts and services they outsource, while refocusing on their core capabilities. Outsourcing parts and services to independent, external suppliers means that suppliers' performance is increasingly critical to the long‐term success of these buying firms. Buying firms are increasingly using disparate supplier development strategies to improve supplier performance including supplier assessment, providing incentives for improved performance, instigating competition among suppliers, and direct involvement of the buying firm's personnel with suppliers through activities such as training of suppliers' personnel. Using resource‐based theory, internalization theory, and structural equation modeling, we examine the impact of these supplier development strategies on performance. We conclude that direct involvement activities, where the buying firm internalizes a significant amount of the supplier development effort, play a critical role in performance improvement.     

Standpoint theory and middle-range theorizing in International Sociology

This paper responds to Julian Go's Lecture “Thinking against Empire. Anti-colonial Thought and Social Theory.” It proceeds in two parts: I first follow Go's invitation to read and reread Mabel Dove Danquah and Frantz Fanon and explore what their work contributes to our understanding of state-forms. I then examine the terms of Go's invitation more closely. I contrast Go's juxtaposition of imperial sociology on the one hand and anti-colonial sociology on the other hand, with the broader range of theoretical traditions and methods, which a practice-oriented sociology of sociology and an international history of sociology would highlight. I raise the question what “standpoint” adds to the authors Go discusses and the broader range of scholars who have engaged with post-colonial contexts in their research at this point in time. Calling for consideration of the anti-colonial standpoint is a particular choice, which has a distinctive heritage in Hegelian-Marxian projections of the social whole and is in tension with either deep exploration of particular thinkers or the middle-range theorizing that Go also seems to endorse. Defined at a level of abstraction that is “above” (or underneath) actual conversations in a range of fields and subfields, it can appear as a “test” for scholars who have long engaged with post-colonial contexts, which can have unintended consequences when coupled with the institutional power and asymmetric insularity of Anglo-American academia.     

The ‘compliant’, the ‘pacified’ and the ‘rebel’: experiences with Swiss disability insurance

Switzerland’s social policies in the field of disability have been significantly reshaped over the last two decades by reducing the number of allowances awarded and by increasing the recourse to vocational rehabilitation measures. What stances do individuals who experience the implementation of these policies adopt? What kind of tests are they subjected to? How can we explain the posture they adopt – be it ‘compliant’, ‘pacified’ or ‘rebellious’ – when facing the (re)assignations of their identity and professional status? Drawing on interviews conducted with individuals who have recently been involved in programmes set up by Swiss disability insurance, we highlight their uncertainties and concerns relating to their place in society, as well as their reactions to disability insurance’s interventions.     

Levelling across the life‐span?: Tracing the face vowel in panel data from the North East of England

Apparent time analysis has revealed that the Tyneside face vowel is the site of two intersecting trends: levelling towards the supra‐northern monophthong as well as the gradual incursion of the southern standard closing diphthong. This article investigates the participation of individual speakers across their life‐span in these ongoing changes in the face vowel. We report on a small‐scale panel sample of six speakers who were recorded in 1971 and again, 42 years later, in 2013. The analysis probes the stability of individual speakers’ grammars, relying on longitudinal ethnographic analysis in the community as well as insights gleaned from sociolinguistic interviews about the speakers’ socio‐demographic trajectory and their presentations of self. The article contributes to the growing body of panel research that aims to determine the scope and the limits of linguistic malleability across speakers’ life histories.     

City parks vs. natural areas - is it possible to preserve a natural level of bee richness and abundance in a city park?

Urbanisation is an expansive process and a majority of insects live in human-modified areas. At the same time, a decrease in pollinator species richness and abundance has recently been observed in Europe, which in turn may have serious ecological and economic consequences. This study investigates the abundance, species richness and functional traits of wild bees in urban city parks in comparison to natural areas. The aim of this research was to assess the potential conservation values of urban green areas for bees. The present study demonstrates that a large and diversified city park may be a favourable habitat for bees, comparable to the natural fauna both in terms of the number and abundance of bee species. However, the study also showed that there were differences in the occurrence of species with different functional traits in the city parks investigated and in the natural landscape.     

Feeling Europe: political emotion,knowledge, and support for the European Union

Theories of political emotion suggest that feelings towards an issue or candidate are often better predictors for support than attitudes or preferences. We investigate whether this conjecture also holds for more abstract political entities, such as the European Union (EU), and test whether EU citizens’ feelings toward the EU are significant predictors of their EU support. We first review existing research and provide theory-driven propositions of how positive and negative emotion may influence EU-related attitudes. Second, using multilevel regression models fitted to Eurobarometer data, we estimate how feelings toward the EU are associated with support for the EU. In line with our hypotheses, analyses show that positive emotions are positively associated with EU-support, while negative affect is negatively associated with it. Contrary to some theoretical predictions, however, these effects are not mediated by individuals’ use of EU-related information.     

Effects of resistance training on liver structure and function of aged rats

The aging process may cause negative physiological changes. However, exercises as resistance training (RT) have been considered an important intervention to attenuate these changes. Additionally, liver plays an important role in blood glucose homeostasis in exercise.

Aim: This study aimed to analyze the effects of RT on the liver components of aged animals.

Methods: Male Wistar rats were divided into two groups: 24 months’ group (CONTROL); and group submitted to a progressive RT protocol for 16 weeks (EXERCISE). Both groups were sacrificed at 24 months.

Results: We observed a decrease in blood flow due to the practice of resistance exercises. Besides, our results showed that hepatic tissue plays an important role in glycemic homeostasis during RT. In addition, RT increased mitogen capacity of hepatocytes.

Conclusions: Our study showed many implications for the knowledge about the effects of strength training on old animals’ liver.