Perception of Mobile Phone and Base Station Risks

Perceptions of risks associated with mobile phones, base stations, and other sources of electromagnetic fields (EMF) were examined. Data from a telephone survey conducted in the German- and French-speaking parts of Switzerland are presented (N = 1,015). Participants assessed both risks and benefits associated with nine different sources of EMF. Trust in the authorities regulating these hazards was assessed as well. In addition, participants answered a set of questions related to attitudes toward EMF and toward mobile phone base stations. According to respondents' assessments, high-voltage transmission lines are the most risky source of EMF. Mobile phones and mobile phone base stations received lower risk ratings. Results showed that trust in authorities was positively associated with perceived benefits and negatively associated with perceived risks. People who use their mobile phones frequently perceived lower risks and higher benefits than people who use their mobile phones infrequently. People who believed they lived close to a base station did not significantly differ in their level of risks associated with mobile phone base stations from people who did not believe they lived close to a base station. Regarding risk regulation, a majority of participants were in favor of fixing limiting values based on the worst-case scenario. Correlations suggest that belief in paranormal phenomena is related to level of perceived risks associated with EMF. Furthermore, people who believed that most chemical substances cause cancer also worried more about EMF than people who did not believe that chemical substances are that harmful. Practical implications of the results are discussed.     

Natural Hazards and Motivation for Mitigation Behavior: People Cannot Predict the Affect Evoked by a Severe Flood

Past research indicates that personal flood experience is an important factor in motivating mitigation behavior. It is not fully clear, however, why such experience is so important. This study tested the hypothesis that people without flooding experience underestimate the negative affect evoked by such an event. People who were affected by a severe recent flood disaster were compared with people who were not affected, but who also lived in flood-prone areas. Face-to-face interviews with open and closed questions were conducted ( n = 201). Results suggest that people without flood experience envisaged the consequences of a flood differently from people who had actually experienced severe losses due to a flood. People who were not affected strongly underestimated the negative affect associated with a flood. Based on the results, it can be concluded that risk communication must not focus solely on technical aspects; in order to trigger motivation for mitigation behavior, successful communication must also help people to envisage the negative emotional consequences of natural disasters.     

The Efficacy of Emotionally Focused Couples Therapy and Behavioral Couples Therapy: A Meta‐Analysis

Behavioral couple therapy (BCT) and emotionally focused couples therapy (EFCT) are well‐established treatments to reduce couple distress. This meta‐analysis summarizes the current state of knowledge on the efficacy of these two therapy methods by focusing on randomized controlled trials only. A literature search revealed 33 suitable primary studies (2,730 participants in total), all of them measuring relationship satisfaction. Robust‐variance random‐effects meta‐analysis revealed medium effect sizes at post‐test (overall: g = 0.60; BCT: g = 0.53; EFCT: g = 0.73) and small effect sizes of 6 months after treatment (overall: g = 0.44; BCT: g = 0.35; EFCT: g = 0.66), but these gains were not maintained after 12 months (BCT only: g = 0.06). Between the two therapy methods, no significant effect size differences could be found. Results have to be interpreted with caution due to potential publication bias.     

Childhood studies,children's politics and participation: perspectives for processes of democratisation

ABSTRACT

From the early Frankfurt School through to the work of Manuel Castells, there has been a rich body of work on the cleavage between technological and social developments of the twentieth century in respect of the consequences for the constitution of subjectivity. However, little attention is paid to the role of children during their childhoods in attempts to bridge this gap beyond discussions about the democratic actors children will become when they are adults. This paper argues that only the full integration of children, during their childhoods, into democratic development of societies will prevent the deepening of the rift between technological and social progress. The paper traces the correspondence between the new childhood studies and those concepts of politics and politicisation which can support social progress towards an emancipatory social perspective undergirded by particular and democratisation of all areas of everyday life. Drawing on Bourdieu and ideas of participation as action, the paper critically examines the various mechanisms by which children are conventionally excluded from democratic participation and then explores how a deeper consideration of agency in childhood and social actorship opens up alternative mechanisms of inclusion and the concomitant expansion of the concept of democracy.     

Optimal job insertion in the no-wait job shop

The no-wait job shop (NWJS) considered here is a version of the job shop scheduling problem where, for any two operations of a job, a fixed time lag between their starting times is given. Also, sequence-dependent set-up times between consecutive operations on a machine can be present. The NWJS problem consists in finding a schedule that minimizes the makespan. We address here the so-called optimal job insertion problem (OJI) in the NWJS. While the OJI is NP-hard in the classical job shop, it was shown by Gröflin & Klinkert to be solvable in polynomial time in the NWJS. We present a highly efficient algorithm with running time $\mathcal {O}(n^{2}\cdot\max\{n,m\})$ for this problem. The algorithm is based on a compact formulation of the NWJS problem and a characterization of all feasible insertions as the stable sets (of prescribed cardinality) in a derived comparability graph. As an application of our algorithm, we propose a heuristic for the NWJS problem based on optimal job insertion and present numerical results that compare favorably with current benchmarks.     

The flexible blocking job shop with transfer and set-up times

The Flexible Blocking Job Shop (FBJS) considered here is a job shop scheduling problem characterized by the availability of alternative machines for each operation and the absence of buffers. The latter implies that a job, after completing an operation, has to remain on the machine until its next operation starts. Additional features are sequence-dependent transfer and set-up times, the first for passing a job from a machine to the next, the second for change-over on a machine from an operation to the next. The objective is to assign machines and schedule the operations in order to minimize the makespan. We give a problem formulation in a disjunctive graph and develop a heuristic local search approach. A feasible neighborhood is constructed, where typically a critical operation is moved (keeping or changing its machine) together with some other operations whose moves are “implied”. For this purpose, we develop the theoretical framework of job insertion with local flexibility, based on earlier work of Gröflin and Klinkert on insertion. A tabu search that consistently generates feasible neighbor solutions is then proposed and tested on a larger test set. Numerical results support the validity of our approach and establish first benchmarks for the FBJS.     

Delinking of economic growth and materials turnover

National material flow analyses and materials balances are indispensable sources of information with respect to the operationalizalion of sustainable development. Both of these instruments are already employed in official statistics in Germany and Japan, and other countries—especially member slates of the European Union—are likely to follow suit. Because of the preparatory stages of work that have already been carried out, Austria is in an excellent position to assume a leading role in international concerted action. From 1970 to 1990 total materials flow through Austrian society has approximately increased by one third. As can be seen from changes in the amount of primary energy used during this period, economic growth in physical terms and value added in production decoupled slightly, and the same is true for the use of materials. Since 1970, materials input per unit of GDP (material intensity) decreased by 25%. This implies that relative gains in efficiency are compensated by the annual increases in the use of materials which, by and large, are caused by few yet massive ‘strategic’ material flows of steel, cement, wood, paper/pulp, sand, gravel and crushed stone. The empirical findings suggest that delinking of economic growth from the metabolism of human society should be discussed more carefully. The concept of ‘delinking’ involves two alternative perspectives of development differing from each other with respect to their ecological effects. The analysis may either focus upon absolute changes in materials throughput or on the relative changes of materials throughput per unit of output. It is strongly recommended, therefore, to distinguish clearly between relative and absolute productivity of resources. Branch analyses confirmed, once again, that the information contained in material indicators related to value‐added concepts is relatively insignificant when it comes to evaluation of the social ‘pressures upon the environment’.