Estimation of parameters in DNA mixture analysis

In [7], a Bayesian network for analysis of mixed traces of DNA was presented using gamma distributions for modelling peak sizes in the electropherogram. It was demonstrated that the analysis was sensitive to the choice of a variance factor and hence this should be adapted to any new trace analysed. In this paper, we discuss how the variance parameter can be estimated by maximum likelihood to achieve this. The unknown proportions of DNA from each contributor can similarly be estimated by maximum likelihood jointly with the variance parameter. Furthermore, we discuss how to incorporate prior knowledge about the parameters in a Bayesian analysis. The proposed estimation methods are illustrated through a few examples of applications for calculating evidential value in casework and for mixture deconvolution.     

Negative spillover effects in brand cooperation

This research investigates negative spillover effects on brand trust and purchase intentions due to violations of implicit or explicit rules within brand cooperation (transgressions). In particular, this research examines a joint new product launch activity of a focal brand and a partner brand. Study 1, an experimental study with brand community members of the focal brand and different transgression scenarios, reveals fewer spillover effects on the focal brand when the partner brand is responsible for the transgression, and discovers more negative spillover effects on the partner brand when the focal brand causes the transgression. In other words, brand community members transfer the responsibility for the transgression to an external cause. Study 2 explores different forms of crisis communication in the context of a product launch delay and finds that a denial by the focal brand is more effective with respect to image restoration than a denial by the partner brand. However, when both brands deny responsibility at the same time, the denial negatively influences trust in both brands.     

The effect of compulsory schooling on health—evidence from biomarkers

Using data from the Health Survey for England and the English Longitudinal Study on Ageing, we estimate causal effects of schooling on health. Our study complements earlier studies exploiting two nationwide increases in British compulsory school leaving age in 1947 and 1973, respectively, by using biological stress markers as measures of health outcomes in addition to self-reported measures. We find a strong positive correlation between education and health, both self-rated and measured by blood fibrinogen and C-reactive protein levels. However, causal effects estimates based on compulsory schooling changes are ambiguous and remain statistically insignificant.     

The Importance of Parenting and Financial Contributions in Promoting Fathers' Psychological Health

This study explores the relationship between residential, biological fathers' parental engagement, financial contributions, and psychological well‐being in 2‐parent families. Specifically, this study focuses on how fathers' parental engagement and financial contributions are related to their self‐esteem, self‐efficacy, and psychological distress. Analyses utilize data from the first 2 waves of the Panel Study of Income Dynamics' Child Development Supplement and employ a subsample of father‐child pairs (N = 771). The most consistent finding was that fathers' engagement in parenting and financial contributions to the family predicted improvements in fathers' psychological well‐being. On the other hand, the results found very limited support for the more common proposition that healthy psychological functioning promotes increases in fathers' parental engagement and financial contributions.     

Change-making problems revisited: a parameterized point of view

The change-making problem is the problem of representing a given amount of money with the fewest number of coins possible from a given set of coin denominations. In the general version of the problem, an upper bound for the availability of every coin value is given. Even the special case, where for each value an unlimited number of coins is available, is NP-hard. Since in the original problem some amounts can not be represented, especially if no coin of value one exists, we introduce generalized problems that look for approximations of the given amount such that a cost function is minimized. We recall algorithms for the change-making problem and present new algorithms for the generalized version of the problem. Motivated by the NP-hardness we study fixed-parameter tractability of all these problems. We show that some of these problems are fixed-parameter tractable and that some are \(\hbox {W}[1]\)-hard. In order to show the existence of polynomial and constant-size kernels we prove some general results and apply them to several parameterizations of the change-making problems.     

Potentials,problems and possibilities for developing New Zealand’s built environment through high-value geospatial information

Gaining useful information about our built, social and natural environments is vital and possible. The value of data for cities is more informed, more effective management and development choices resulting in more benefits to a greater range of stakeholders. This article explores the state-of-play of data infrastructures in New Zealand to identify the challenges to gaining better value from geospatial information. Following engagement with built environment data custodians and information users, it analyses how digital information infrastructure can support the sharing and use of richer and more comprehensive information by weaving a supportive fabric across data. The analysis reveals that data infrastructures primarily need to facilitate agreement on data management, sharing and use; the sharing of costs and benefits across stakeholders; and emphasise place as a powerful driver to richer information. An overarching sociotechnical approach to digital information infrastructure weaves data platforms, policy and technology together.     

How the psychosocial work environment of motor vehicle mechanics may influence coping with musculoskeletal symptoms

A number of studies have shown that musculoskeletal symptoms are related to the physical and psychosocial work environments. Workers with musculoskeletal symptoms are often advised to cope by such measures as changing working technique, using lifting equipment and discussing health and environmental problems with supervisors and colleagues. Intervention studies at the individual level, however, have shown that such advice has limited effects in reducing the prevalence of musculoskeletal symptoms. The hypothesis for this study was that negative social and organizational factors may prevent workers from implementing such coping strategies. All 103 motor vehicle mechanics surveyed in 12 different garages responded to a questionnaire on coping with musculoskeletal symptoms and the psychosocial work environment. Positive and significant relationships were shown between how mechanics coped with their musculoskeletal symptoms and such psychosocial factors as work demands, social support, control, manager's involvement in health and safety work, and whether the garages had regular meetings between management and workers. Achieving positive results from preventive work through back schools and other ergonomic interventions seems to require that an organization with positive attitudes towards health and safety work be created before such interventions are implemented.     

Innere Kündigung — ein Thema in der Supervision

Giving notice internally — a topic in supervision The problem of giving notice internally is reported by members of group-, teamand individual supervision and can be treated in different settings. An analysis of the consciously or unconsciously taken attitude towards the own professional work may help to uncover such phenomena, to interprete and to assess them concerning their effects on the involved persons and their social surroundings. The process of Internal notice can be reversed by the involved persons themselves if the conditions of work are changed. By conclusion, it is obvious to understand phenomena of Internal notice as an indication of bad conditions in a working system and to examine the possibilities of change