Identifiable state‐space models: A case study of the Bay of Fundy sea scallop fishery

State‐space models (SSMs) are now popular tools in fisheries science for providing management advice when faced with noisy survey and commercial fishery data. Such models are often fitted within a Bayesian framework requiring both the specification of prior distributions for model parameters and simulation‐based approaches for inference. Here we present a frequentist framework as a viable alternative and recommend using the Laplace approximation with automatic differentiation, as implemented in the R package Template Model Builder, for fast fitting and reliable inference. Additionally we highlight some identifiability issues associated with SSMs that fisheries scientists should be aware of and demonstrate how our modelling strategy surmounts these problems. Using the Bay of Fundy sea scallop fishery we show that our implementation yields more conservative advice than that of the reference model. The Canadian Journal of Statistics 47: 27–45; 2019 © 2018 Statistical Society of Canada     

Everyday Life in the Suburbs of Berlin: Consequences for the Social Participation of Aged Men and Women

Against the background of demographic change, mobility issues are becoming crucial. Especially for the elderly, daily outdoor activities are essential for participation in social life. This article addresses the question of what extent older people, especially women, are threatened by limited social participation in Berlin’s suburbia. The mobility of older women (70+) is characterized by the least number of trips, the shortest distances, and more than 50% walking trips. Besides, many older women are dissatisfied with their residential area. Given the lack of essential facilities, older women have to be considered as disadvantaged in terms of limited social participation.     

Contention and Social Movements in an International and Transnational Perspective: Denmark 1914 – 1995

Ever since the emergence of mass movements as a mode of political organization in the 19th century we have witnessed simultaneous waves of protest in different countries and the diffusion of social movements across nations. After a presentation of data, methods, and theory, this article endeavors to analyse the development of contentious politics in Denmark, 1914 –1995, as a function of the international distribution of power, international political and economic crises, and the diffusion of social movements. The important analytical implication is that social movements and contentious politics must not only be understood in the light of national factors, but the existence of international opportunity structures must also be considered.     

The relationship between brain lateralization measured with self-reporting techniques and with dichotic listening

Hypotheses derived from brain lateralization research have had considerable influence on contemporary personal selection and training as well as upon communication and advertising testing. These applications, however, rely upon measurements the validity of which is not proven. In the present paper research on the validity of these measurements is reviewed and findings from studies aimed at throwing further light on the cross validity of selected measurements such as self-administered questionnaires, and dichotic listening are reported. The review as well as the reported findings suggests that one has to be cautious with the application of brain lateralization theories to normal individuals till more is known about the precise functioning of the alternative measurements applied. Eventually, research on cross validation of self-reporting techniques and dichotic listening with EEC-measures is suggested.     

The correlation between thermal comfort in buildings and fashion products

This article is about thermal comfort in the wearable product. The research correlates fashion and architecture, in so far as it elects the brise soleil - an architectural element capable of regulating temperature and ventilation inside buildings - as a study referential, in trying to transpose and adapt its mechanisms to the wearable apparel.     

The Diffusion and Innovation of Muslim Organizations in Denmark

Since 1965, the latest immigration to Denmark has not only brought new groups to the country but also resulted in new organizations, associations and movements established by people with Muslim background. In order to understand this extension and renewal of Danish civil society I distinguish between forms of organizations and forms of diffusion. The outcome of the analysis reveals four distinct clusters of Muslim organizations in Denmark: The first generation of Muslim associations was characterized by centralized state sponsored organizations, governed and financed by Arab countries and Turkey. The second generation of Muslim organizations took the form of transnational social movements and were often set up as a counterpart to the state sponsored organizations. The third wave of organization building, the so-called homegrown organizations, tried to unite Muslims in Denmark and worked for a dialog with the Danish majority. Most of the Muslim youth organizations belong to this category. However, some political Islamic youth organizations and networks have chosen an alternative strategy that challenges mainstream Danish institutions and values. The reaction of the government has been to tone down cooperation with representatives from the immigrant population and especially representatives from the Muslim minority.     

A Trichloroethylene Risk Assessment Using a Monte Carlo Analysis of Parameter Uncertainty in Conjunction with Physiologically-Based Pharmacokinetic Modeling

A Monte Carlo simulation is incorporated into a risk assessment for trichloroethylene (TCE) using physiologically-based pharmacokinetic (PBPK) modeling coupled with the linearized multistage model to derive human carcinogenic risk extrapolations. The Monte Carlo technique incorporates physiological parameter variability to produce a statistically derived range of risk estimates which quantifies specific uncertainties associated with PBPK risk assessment approaches. Both inhalation and ingestion exposure routes are addressed. Simulated exposure scenarios were consistent with those used by the Environmental Protection Agency (EPA) in their TCE risk assessment. Mean values of physiological parameters were gathered from the literature for both mice (carcinogenic bioassay subjects) and for humans. Realistic physiological value distributions were assumed using existing data on variability. Mouse cancer bioassay data were correlated to total TCE metabolized and area-under-the-curve (blood concentration) trichloroacetic acid (TCA) as determined by a mouse PBPK model. These internal dose metrics were used in a linearized multistage model analysis to determine dose metric values corresponding to 10^-6 lifetime excess cancer risk. Using a human PBPK model, these metabolized doses were then extrapolated to equivalent human exposures (inhalation and ingestion). The Monte Carlo iterations with varying mouse and human physiological parameters produced a range of human exposure concentrations producing a 10^-6 risk.     

The impact of a respite volunteer ‘buddy’ programme on behavioural and psychological well-being in young carers

Young carers often face a great amount of emotional burden and have high practical and social responsibilities. The role of being a young carer is associated with behavioural, developmental, physical and psychosocial problems that may not only affect the individual in childhood but also in adulthood. The aim of this study was to investigate the effect of a Danish respite volunteer programme called The Buddies for Children and Youngsters Programme on young carers' (n = 49; aged 6–16) social–emotional functioning. A pre–post-design was applied, and data were collected through the parent version of the strengths and difficulties questionnaire (SDQ), here with an impact supplement at baseline and at the end of the programme (after 4 months). The programme showed a positive impact on emotional symptoms, hyperactivity symptoms, conduct problems, peer problems, prosocial aspects and impact aspects, with mean differences values of −2.50 (p = .000), −0.62 (p = .271), −1.18 (p = .000), −0.74 (p = .008), 0.62 (p = .004) and −0.88 (p = .007), respectively. Furthermore, a large effect was found for the total difficulties score: −5.03 (p = .000). In conclusion, the programme seems promising considering its effect on young carers' social–emotional functioning. However, future research should include comparative studies with a longer duration.