Layers of complexity arise when a person arrives in an Intensive Care Unit (ICU) due to self-harm intended to end their life and when there is known past personal trauma. We highlight three importa...

It is the impression of neurologists who deal with cancer patients that the incidence of neurologic complications of cancer is increasing (Posner 1995). ...

In this work, our aim is to investigate the impact of a non-Kolmogorov predator-prey-subsidy model incorporating nonlinear prey refuge and the effect of fear with Holling type II functional response. The model arises from the study of a biological system involving arctic foxes, lemmings, and seal carcasses. The positivity and asymptotically uniform boundedness of the solutions of the system have been derived. Analytically, we have studied the criteria for the feasibility and stability of different equilibrium points. In addition, we have (...) derived sufficient conditions for the existence of local bifurcations of codimension 1. It is also observed that there is some time lag between the time of perceiving predator signals through vocal cues and the reduction of prey’s birth rate. So, we have analyzed the dynamical behaviour of the delayed predator-prey-subsidy model. Numerical computations have been performed using MATLAB to validate all the analytical findings. Numerically, it has been observed that the predator, prey, and subsidy can always exist at a nonzero subsidy input rate. But, at a high subsidy input rate, the prey population cannot persist and the predator population has a huge growth due to the availability of food sources. (shrink)

This chapter offers an essay on the evolution of evolvability. It investigates the most frequently cited arguments against the possibility that the evolution of evolvability might be the result of selection favoring more evolvable genotypes. The chapter argues that all these arguments have not been rigorously analyzed by their proponents, and are thus a self-inflicted blind spot in evolutionary biology, and indicates that there are no deep conceptual obstacles for population genetic theory to explain the evolution of evolvability. The very (...) focus on this subject will help shift the perspective of evolutionary biology toward a more holistic, systemic view of evolution. (shrink)

We apply an online optimization process based on machine learning to the production of Bose-Einstein condensates. BEC is typically created with an exponential evaporation ramp that is optimal for ergodic dynamics with two-body s-wave interactions and no other loss rates, but likely sub-optimal for real experiments. Through repeated machine-controlled scientific experimentation and observations our ’learner’ discovers an optimal evaporation ramp for BEC production. In contrast to previous work, our learner uses a Gaussian process to develop a statistical model of the (...) relationship between the parameters it controls and the quality of the BEC produced. We demonstrate that the Gaussian process machine learner is able to discover a ramp that produces high quality BECs in 10 times fewer iterations than a previously used online optimization technique. Furthermore, we show the internal model developed can be used to determine which parameters are essential in BEC creation and which are unimportant, providing insight into the optimization process of the system. (shrink)

Exposure of man to chemical agents can occur intentionally, as in the treatment of disease, or inadvertently because the environment contains a wide range of synthetic or naturally occurring chemicals. The alkylating agents are a diverse group of compounds (Fig. 1) and comprise a good example of such xenobiotics, since much is known about their occurrence, and their biological effects include carcinogenicity, mutagenicity, toxicity and teratogenicity.Exposure to potentially carcinogenic alkylating agents such as nitrosamines may occur occupationally, from cigarette smoke, from (...) certain foodstuffs and even endogenously through the ingestion of the appropriate precursor chemicals.1 At the other extreme, the cytotoxic effects of agents such as the chloroethylating nitrosamides or mustards have been exploited in the design of certain antitumour drugs.2 The effectiveness of antitumour agents and the other, mostly adverse, biological effects of alkylating agents have been ascribed to their ability to damage cellular macromolecules, in particular DNA. This review concentrates on investigations carried out over the past two years on the role of DNA damage in carcinogenesis, but we shall see how recent advances in this area of research have also led to a better understanding of the mechanisms of the cytotoxic effects of alkylating antitumour agents. (shrink)

In this first volume of original essays on rhetorical criticism to appear in many years, the authors stress active engagement in the critical process. Bearing in mind the complaint frequently leveled at rhetorical criticism—that method as method has taken precedence over understanding and appreciation—the editors encouraged innovation, and the contributors responded by moving beyond the merely theoretical to explore implications through implied criticism, participating in the activity rather than merely talking about it. Consequently, these essays avoid further lamentation over the (...) current state of the art and concentrate instead on constructive presentations. Not only do the essays add significantly to knowledge about rhetorical criticism, but they also serve liberal education by helping to bring understanding, discrimination, and appreciation to the entire process of human communication. (shrink)

Mental health surveys are used extensively in epidemiological research worldwide. The ethical questions that arise regarding their risk of causing psychological distress or other potential harm have not been studied in the general population. We have investigated how study participants serving as controls in a population-based study perceived an anonymous postal questionnaire focusing on mental health and wellbeing. Parents were contacted from the Swedish Census Bureau as part of a larger follow-up study on palliative care conducted in 2001. Eligible parents (...) had a child of the same gender, year of birth and were from the same counties in Sweden as parents who had lost a child to cancer. Five percent reported being negatively affected. The principle negative effect on participants was that self-reflection reminded them of their difficulties. Of the 418 respondents, 52% reported that they were positively affected by study participation and 95% perceived the inquiry as valuable. These findings support the use of population-based controls in future research. (shrink)

This article presents the results of a study that investigated the roles that one's money ethic, religiosity and attitude toward business play in determining consumer attitudes/beliefs in various situations regarding questionable consumer practices. Two dimensions of religiosity - intrinsic and extrinsic religiousness - were studied. A global scale of money ethic was examined, as was a global measure of attitude toward business. Results indicate that both types of religiosity as well as one's money ethic and attitude toward business were significant (...) determinants of at least some types of consumer ethical beliefs. (shrink)

This exploratory study of ethical decision making by individuals in organizations found moral intensity, as defined by Jones (1991), to significantly influence ethical decision making intentions of managers. Moral intensity explained 37% and 53% of the variance in ethical decision making in two decision-making scenarios. In part, the results of this research support our theoretical understanding of ethical/unethical decision-making and serve as a foundation for future research.

Background Residual dried blood spots (rDBS) from newborn screening programmes represent a valuable resource for medical research, from basic sciences, through clinical to public health. In Hong Kong, there is no legislation for biobanking. Parents’ view on the retention and use of residual newborn blood samples could be cultural-specific and is important to consider for biobanking of rDBS. Objective To study the views and concerns on long-term storage and secondary use of rDBS from newborn screening programmes among Hong Kong Chinese (...) parents. Methods A mixed-method approach was used to study the views and concerns on long-term storage and secondary use of rDBS from newborn screening programmes among Hong Kong Chinese parents of children 0–3 years or expecting parents through focus groups (8 groups; 33 participants) and a survey (n = 1012, 85% mothers) designed with insights obtained from the focus groups. We used framework analysis to summarise the themes as supportive factors, concerns and critical arguments for retention and secondary use of rDBS from focus group discussion. We used multiple logistic regression to assess factors associated with support for retention and secondary use of rDBS in the survey. Results Both in focus groups and survey, majority of parents were not aware of the potential secondary use of rDBS. Overall secondary use of rDBS in medical research was well accepted by a large proportion of Hong Kong parents, even if all potential future research could not be specified in a broad consent. However parents were concerned about potential risks of biobanking rDBS including leaking of data and mis-use of genetic information. Parents wanted to be asked for permission before rDBS are stored and mainly did not accept an “opt-out” approach. The survey showed that parents born in mainland China, compared to Hong Kong born parents, had lower awareness of newborn screening but higher support in biobanking rDBS. Higher education was associated with support in rDBS biobanking only among fathers. Conclusion Long-term storage and secondary use of rDBS from newborn screening for biomedical research and a broad consent for biobanking of rDBS are generally acceptable to Hong Kong parents given their autonomy is respected and their privacy is protected, highlighting the importance of an accountable governance and a transparent access policy for rDBS biobanks. (shrink)

Biografie van de Nederlandse filosoof G.J.P.J. Bolland (1854-1922).

We examine the emergence of the field of life-history strategies during the 1950s. (We consider a 'field' an area of scientific activity consisting of a theoretical core, a subject of research, a vocabulary and research tools). During the late 1940s and early 1950s, population ecology faced many problems, concerning its conceptual framework, its mathematical models, experimental deficiencies, etc. Research on life-history characteristics remained descriptive, lacking explanations about the causes and significance of phenomena. This was due to the deficiencies of the (...) theoretical framework of population ecology up to the 1950s. The catalyzing factor for the emergence of the new field was the interdisciplinary impacts, and especially the impact of neodarwinism. The elaboration of a new theoretical core, invoking also methodological shifts, was the triggering factor, conditioning the emergence of the new field. (shrink)