The balance between births and deaths in an age-structured population is strongly influenced by the spatial distribution of sub-populations. Our aim was to describe the demographic process of a fish population in an hierarchical dendritic river network, by taking into account the possible movements of individuals. We tried also to quantify the effect of river network changes (damming or channelling) on the global fish population dynamics. The Salmo trutta life pattern was taken as an example for.We proposed a model which (...) includes the demographic and the migration processes, considering migration fast compared to demography. The population was divided into three age-classes and subdivided into fifteen spatial patches, thus having 45 state variables. Both processes were described by means of constant transfer coefficients, so we were dealing with a linear system of difference equations. The discrete case of the variable aggregation method allowed the study of the system through the dominant elements of a much simpler linear system with only three global variables: the total number of individuals in each age-class. (shrink)

Background Voluntary post-mortem donation to science (PDS) is the most appropriate source for body dissection in medical education and training, and highly useful for biomedical research. In Mexico, unclaimed bodies are no longer a legal source, but PDS is legally possible, although scarcely facilitated, and mostly ignored by the general population. Therefore, we aimed to evaluate the attitude and willingness for PDS and to identify a sociodemographic profile of people with willingness toward PDS. Methods A validated on-line survey was distributed (...) by the convenience method via the social networks of a Catholicism-inspired, private university in northern Mexico. Frequency analyses of all variables and coded free comments were complemented with association studies. Results Although the responder cohort (n = 143) was too small and biased to be representative of the university community (n = 13,500), willingness to post-mortem organ donation was 90.7% and to PDS 70.7%. In this cohort, PDS willingness had the strongest association with mature age (> 40 years old; P, 0.0008). Among young adults, willingness to PDS was the lowest among volunteers from technical and business schools and the highest among those from the social sciences (P, 0.009). Respondents from the social sciences were also the most consistent between attitude and behavior with respect to organ donation. A free comment option revealed respondents were interested in the unusual taboo topic. Conclusions A small, but sufficiently large proportion expressed willingness toward PDS. In our university cohort, which was biased in higher education and altruism, mature age and social interest were associated with PDS willingness. (shrink)

Background: Ethics consultation is used regularly by some doctors, whereas others are reluctant to use these services.Aim: To determine factors that may influence doctors to request or not request ethics consultation.Methods: A survey questionnaire was distributed to doctors on staff at the University Community Hospital in Tampa, Florida, USA. The responses to the questions on the survey were arranged in a Likert Scale, from strongly disagree, somewhat disagree, neither agree nor disagree, somewhat agree to strongly agree. Data were analysed with (...) the Wilcoxon test for group comparisons, the χ2 test to compare proportions and a logistic regression analysis.Results: Of the 186 surveys distributed, 121 were returned, giving a 65% response rate. Demographic data were similar between the groups saying yes and no . No statistically significant differences were observed between the user and non-user groups in terms of opinions about ethics consultants having extensive training in ethics or participating in ethics educational opportunities. On the issue “Ethics committee members or consultants cannot grasp the full picture from the outside”, the non-users were neutral, whereas the users somewhat disagreed . Even more significant was the difference between surgeons and non-surgeons, where, by logistic regression analysis, surgeons who believed that ethics consultants could not grasp the full picture from the outside were highly likely to not use . Non-users of ethics consultations thought that it was their responsibility to resolve issues with the patient or family . Users of ethics consultation believed in shared decision making or the importance of alternate points of view .Implications: Ethics consultations are used by doctors who believe in shared decision making. Doctors who did not use ethics consultation tended to think that it was their responsibility to resolve issues with patients and families and that they were already proficient in ethics. (shrink)

In the mid-1970s, the biomedical model of medicine gave way to the biopsychosocial model of medicine; it was billed as a more comprehensive and compassionate model of medicine. After more than a century of disentangling medicine from religion, the medicine and spirituality movement is attempting to bring religion and spirituality back into medicine. It is doing so under a biopsychosociospiritual model. I unpack one model for allowing religion back into medicine called the RCOPE. RCOPE is an instrument designed to categorize (...) religion and spirituality as psychological coping mechanisms. I explore how such instruments are related to the history of statistical measurement and demonstrate the political impetus that governs such enterprises. The biopsychosociospiritual medicine is billed as a more holistic and comprehensive model. This new model of medicine offers total care. However, I demonstrate how this total care becomes totalizing, indeed totalitarian, admitting religion and spirituality back into the fold of medicine under a new secularized medical control. (shrink)

Voluntary active euthanasia and physician assisted suicide should not be legalised because too much that is important about living and dying will be lostIn the first of this two part series, I unpack the historical philosophical distinction between killing and allowing a patient to die in order to clear up the confusion that exists. Historically speaking the two kinds of actions are morally distinct because of older notions of causality and human agency. We no longer understand that distinction primarily because (...) we have shifted our notions of causality from a traditional formulation to a modern formulation of causality and thus of moral assessment that focuses on the effects of an action. In this essay, I prepare the ground for a companion essay by showing that the traditional formulation allows us to maintain notions of meaning and purpose to human living and dying that are precluded in the efficiency paradigm of modernity. Taken together with the companion essay, I am claiming that voluntary active euthanasia and physician assisted suicide should not be legalised because too much that is important about dying and living will be lost.TWO LIESIt would be naïve to think that euthanasia, in either the VAE sense, or in the more passive sense of PAS, does not happen. It would even be naïve to think that it does not occur in a non-voluntary form. It would be equally naïve, however, to think it could be controlled through governmental regulation. The real question with regard to PAS/VAE, put so eloquently by Martha Minow, is which lie do you countenance: the lie that euthanasia does not already happen, or the lie that it can be controlled without having repercussions well beyond the limits of procedural mastery?1 With this two part paper series, I will argue that the …. (shrink)

This volume focuses on the modeling of cognition, and brings together contributions from psychologists and researchers in the field of cognitive science.

In earlier work we have described how computer algebra may be used to derive composite rate laws for complete systems of equations, using the mathematical technique of Gröbner Bases (Bennett, Davenport and Sauro, 1988). Such composite rate laws may then be fitted to experimental data to yield estimates of kinetic parameters.Recently we have been investigating the practical application of this methodology to the estimation of kinetic parameters for the closed two enzyme system of aspartate aminotransferase (AAT) and malate dehydrogenase (MDH) (...) (Fisher 1990a; Fisher 1990b; Bennett and Fisher, 1990). (shrink)

Amongst the readings of the Parisian codex collated by Mr. Stuart which he classes as interpolations is one whose singularity at once arrests attention. In the well-known passage, I. 113 sqq., where all known MSS. including P haveetsi, funesta Pecunia, templonondum habitas, nullas nummorum ereximus aras,ut colitur Pax atque Fides Victoria Virtusquaeque salutato crepitat Concordia nido,II presents firma instead of atque.

The Twelfth Ode of the Third Book of Horace consists of four stanzas in this metre, each stanza consisting of ten feet. How these feet should be distributed into verses is a matter of much dispute; but inasmuch as it does not concern me at the present time I shall avoid it by following certain editors of Horace and printing each stanza continuously.

Biomedical research has a strong impact on a country’s scientific-technological and socioeconomic development. It can make a significant contribution at three different levels: promotion of public health; the exchange of knowledge within the scientific community; and economic/ financial profitability. Africa only attracts ~3.3% of the world’s clinical research. This small proportion is due to, among several factors, the absence of two fundamental aspects: specific robust legislation and capacity for regulatory and ethical evaluation. There are five Portuguese- speaking African countries – (...) Angola, Cabo Verde, Guinea-Bissau, Mozambique and São Tomé and Príncipe. Despite presenting different degrees of clinical research development, these countries show a common serious insufficiency in the minimum conditions necessary for hosting, collaborating or leading biomedical research projects. These countries are also excluded from the support of international organisations for capacity building because of the language barrier. The Biomedical Ethics and Regulatory Capacity Building Partnership for Portuguese-Speaking African Countries project has developed methods to build capacity and partnership through research on national law, comparisons with international standards and by issuing recommendations at a national level. Through collaborative intensive training, trainees are taught to become educators at a national level. This, in turn, creates a sustainable impact at country level. BERC-Luso is a pioneering project, owing to a combination of innovative features. The partnership project: was developed exclusively in Portuguese; involves a large number of African countries, and national and international institutions; has been further enhanced by the diversity and complementarity of its action plans; and has also benefited from a broad participatory methodology based on resolution of recipients’ problems by the recipients themselves. It thus stands out as a model for similar future projects. (shrink)

Im Hinblick auf den Herbrand'schen Satz für die Prädikatenlogik der ersten Stufe und auf die Lehre vom Beweisverfahren mit Rechenautomaten, die daraus folgt, wird ein Beweis als komputazional synthetisch bezeichnet, wenn er sich auf Objekte bezieht, die im erwiesenen Satz nicht erwähnt sind. Die mathematischen Beweise sind aber auch synthetisch in einem begrifflichen Sinne: die Kontrolle oder die Begrenzung der angewandten Begriffe — die sogenannte Methodenreinheit — ist im allgemeinen unerreichbar.

Of the early Roman historians who wrote in Greek, A. Postumius Albinus was not necessarily alone in realizing that his Greek was not the best Greek; while, on the other hand, Cato and those who followed the new fashion of writing in Latin would have resented, we may assume, could they have foreknown, the statement of Q,. Catulus in Cicero's De Oratore that they had no literary or rather ‘oratorical’ merit; though Cato might have approved Catulus' caustic comment on Roman (...) historical writing, ‘Satis est non esse mendacem’. That an historian should not, consciously and deliberately, lie all second-century historians would no doubt have agreed; and they would have endorsed Polybius' condemnation of masquerading as history in a story whose falseness was self-evident, because it assumed, on the part of the young sons of senators at Rome, a gravitas such as no young boy could possibly possess. (shrink)