Approximately three decades ago the question was first answered whether parasitoids are able to assess the number or origin of eggs in a host for a solitary parasitoid, Leptopilina heterotoma, by fitting theoretically derived distributions to empirical ones. We extend the set of different theoretically postulated distributions of eggs among hosts by combining searching modes and abilities in assessing host quality. In the models, parasitoids search either randomly (Poisson) (1) or by vibrotaxis (Negative Binomial) (2). Parasitoids are: (a) assumed to (...) treat all hosts equally, (b) able to distinguish them in unparasitised and parasitised hosts only, (c) able to distinguish them by the number of eggs they contained, or (d) able to recognise their own eggs. Mathematically tractable combinations of searching mode (1 and 2) and abilities (a,b,c,d) result in seven different models (M1a, M1b, M1c, M1d, M2a, M2b and M2c). These models have been simulated for a varying number of searching parasitoids and various mean numbers of eggs per host. Each resulting distribution is fitted to all theoretical models. The model with the minimum Akaike's information criterion (AIC) is chosen as the best fitting for each simulated distribution. We thus investigate the power of the AIC and for each distribution with a specified mean number of eggs per host we derive a frequency distribution for classification.Firstly, we discuss the simulations of models including random search (M1a, M1b, M1c and M1d). For M1a, M1c and M1d the simulated distributions are correctly classified in at least 70% of all cases. However, in a few cases model M1b is only properly classified for intermediate mean values of eggs per host. The models including vibrotaxis as searching behaviour (M2a, M2b and M2c) cannot be distinguished from those with random search if the mean number of eggs per host is low. Among the models incorporating vibrotaxis the three abilities are detected analogously as in models with random search. (shrink)

The practice of coercive measures in psychiatry is controversial. Although some have suggested that it may be acceptable if patients are a danger to others or to themselves, others committed themselves to eliminate it. Ethical, legal and clinical considerations become more complex when the mental incapacity is temporary and when the coercive measures serve to restore autonomy. We discuss these issues, addressing the conflict between autonomy and beneficence/non-maleficence, human dignity, the experiences of patients and the effects of coercive measures. We (...) argue that an appeal to respect autonomy and/or human dignity cannot be a sufficient reason to reject coercive measures. All together, these ethical aspects can be used both to support and to reject a non-seclusion approach. The total lack of controlled trials about the beneficial effects of coercive measures in different populations however, argues against the use of coercive measures. (shrink)

Introduction: In The Netherlands, physicians have to be convinced that the patient suffers unbearably and hopelessly before granting a request for euthanasia. The extent to which general practitioners (GPs), consulted physicians and members of the euthanasia review committees judge this criterion similarly was evaluated. Methods: 300 GPs, 150 consultants and 27 members of review committees were sent a questionnaire with patient descriptions. Besides a “standard case” of a patient with physical suffering and limited life expectancy, the descriptions included cases in (...) which the request was mainly rooted in psychosocial or existential suffering, such as fear of future suffering or dependency. For each case, respondents were asked whether they recognised the case from their own practice and whether they considered the suffering to be unbearable. Results: The cases were recognisable for almost all respondents. For the “standard case” nearly all respondents were convinced that the patient suffered unbearably. For the other cases, GPs thought the suffering was unbearable less often (2–49%) than consultants (25–79%) and members of the euthanasia review committees (24–88%). In each group, the suffering of patients with early dementia and patients who were “tired of living” was least often considered to be unbearable. Conclusions: When non-physical aspects of suffering are central in a euthanasia request, there is variance between and within GPs, consultants and members of the euthanasia committees in their judgement of the patient’s suffering. Possible explanations could be differences in their roles in the decision-making process, differences in experience with evaluating a euthanasia request, or differences in views regarding the permissibility of euthanasia. (shrink)

This paper concludes a special feature of Sustainability Science that explores a broad range of social value theoretical traditions, such as religious studies, social psychology, indigenous knowledge, economics, sociology, and philosophy. We introduce a novel transdisciplinary conceptual framework that revolves around concepts of 'lenses' and 'tensions' to help navigate value diversity. First, we consider the notion of lenses: perspectives on value and valuation along diverse dimensions that describe what values focus on, how their sociality is envisioned, and what epistemic and (...) procedural assumptions are made. We characterise fourteen of such dimensions. This provides a foundation for exploration of seven areas of tension, between: (1) the values of individuals vs collectives; (2) values as discrete and held vs embedded and constructed; (3) value as static or changeable; (4) valuation as descriptive vs normative and transformative; (5) social vs relational values; (6) different rationalities and their relation to value integration; (7) degrees of acknowledgment of the role of power in navigating value conflicts. In doing so, we embrace the 'mess' of diversity, yet also provide a framework to organise this mess and support and encourage active transdisciplinary collaboration. We identify key research areas where such collaborations can be harnessed for sustainability transformation. Here it is crucial to understand how certain social value lenses are privileged over others and build capacity in decision-making for understanding and drawing on multiple value, epistemic and procedural lenses. (shrink)

Onderwerp en gezegde, door D. M. Bakker.--Enkele opmerkingen over het Godsbegrip van Justinus Martyr, door J. den Boeft.--Heidegger, Descartes, Luther, door J. van der Hoeven.--"Geschichtlichkeit" bij Carl Friedrich von Weizsäcker, door G. Horsman.--Menselijke ontmaskering en Bijbels démasqué , door R. Huson.--Kleine geschiedenis van het begrip "niets" in de antieke wijsbegeerte (tot e met de Sofisten en Plato), door P. A. Meijer.--De structuur van opvoeden en opvoedkunde, door J. W. Mojet.--Individualiteit in de fysica, door M. D. (...) Stafleu. (shrink)

This paper concludes a special feature of Sustainability Science that explores a broad range of social value theoretical traditions, such as religious studies, social psychology, indigenous knowledge, economics, sociology, and philosophy. We introduce a novel transdisciplinary conceptual framework that revolves around concepts of ‘lenses’ and ‘tensions’ to help navigate value diversity. First, we consider the notion of lenses: perspectives on value and valuation along diverse dimensions that describe what values focus on, how their sociality is envisioned, and what epistemic and (...) procedural assumptions are made. We characterise fourteen of such dimensions. This provides a foundation for exploration of seven areas of tension, between: (1) the values of individuals vs collectives; (2) values as discrete and held vs embedded and constructed; (3) value as static or changeable; (4) valuation as descriptive vs normative and transformative; (5) social vs relational values; (6) different rationalities and their relation to value integration; (7) degrees of acknowledgment of the role of power in navigating value conflicts. In doing so, we embrace the ‘mess’ of diversity, yet also provide a framework to organise this mess and support and encourage active transdisciplinary collaboration. We identify key research areas where such collaborations can be harnessed for sustainability transformation. Here it is crucial to understand how certain social value lenses are privileged over others and build capacity in decision-making for understanding and drawing on multiple value, epistemic and procedural lenses. (shrink)

continent. 1.2 (2011): 129-135. Introduction Vincent W.J. van Gerven Oei Successions of words are so agreeable. It is about this. —Gertrude Stein Nachoem Wijnberg (1961) is a Dutch poet and novelist. He also a professor of cultural entrepreneurship and management at the Business School of the University of Amsterdam. Since 1989, he has published thirteen volumes of poetry and four novels, which, in my opinion mark a high point in Dutch contemporary literature. His novels even more than his poetry are (...) criticized for being inaccessible, which I generally take to be a compliment. It would be like saying that Fernando Pessoa is inaccessible, which he is not. Neither is Wijnberg. When we think of the combination economist-poet we are immediately reminded of the American poet Wallace Stevens, who, as the story goes, had two stacks of paper on his desk, one for contracts, one for poems. We also know that Stevens wrote on the economy and that questions of economy and insurance surface at multiple points in his poems. The following text is a very preliminary attempt to point at the intersections between poems, novels, business, and poetry in Wijnberg’s work. On the back cover of his novel De opvolging ( The Succession , 2005), Wijnberg states the following: “[This is] a novel for whomever is interested in the workings of a company as much as in the workings of a poem.” Wijnberg thus claims that the way in which a company “works” may be similar to the way in which a poem “works.” The question is the obvious one, what does this similarity consist in? De opvolging tells the story of company in which bosses and company doctors, secretaries, children, clowns, and beggars have tons of meetings, recite poems, perform plays, tell jokes, and succeed each other, climbing up and down in the company’s hierarchy. De opvolging is a novel in which the career of people follows the career of words. It resonates with Gertrude Stein's sentences, "Grammar. What is it. Who was it" (1975, 50). The words in Wijnberg's poems are like he characters in his novel. And if we keep in mind this allegorical reading of De opvolging , which is obviously only one of the possible readings, we may be able to understand some aspects of Wijnberg’s poetry. A repetition is already a pun. Look, that word is trying it again, as if it is afraid that by not doing it it would give up the hope that it will ever be able to do something. A pun is the opposite of the first word coming to the mind of someone who shouts it when he suddenly discovers something. (104) The repetition, the succession of the same word, is already a pun, a joke. The succession of the father by the son after the revolution is a joke. "Look he's trying it again!" The essence of a joke is a repetition. Archimedes’ “Eureka!” is its opposite. Poems can easily become jokes, depending on the way the words follow and repeat each other. In De opvolging , the careers of the bosses, good and bad secretaries, and company doctors easily become jokes, as they are “afraid that by not doing it [they] would give up the hope that [they] will ever be able to do something.” Not only the repetition, but also the distance and difference between the words in a poem, their cause and effect relations can be read as company relations. This becomes clear when we, for example, read the first lines of the poem “Cause, sign” from Het leven van ( The Life Of , 2009). A sign lets know what is going to happen, a cause lets it happen. If the sign also lets happen there is no reason to isolate it, because then I would isolate some- thing only because it’s different for me. If I didn’t have to write this myself, but would have secretaries to whom I could dictate it, I would be able to say more about it. (49) Upon reading the first two lines we can already conclude that any word may be cause or sign or both. If a sign is also a cause there is no reason to discriminate it, yet to the poet they are still different. This difference only becomes expressible the moment he would have a secretary. Just like in De opvolging , the secretary introduces a distance; not in a company but in a poem. Hence the difference between “good” and “bad” secretaries in a company, where the good secretary of one boss may be the bad secretary of another one. The more we can say about the bosses of the company, or signifiers of the poem, the greater the distance we introduce between them and us. We should take serious the relation between Wijnberg’s novels and poems. Although they operate on different scales, they explain and converse with each other. Another example may be the novel Politiek en liefde ( Politics and Love , 2002), which deals with the relation, precisely, between politics and love. In the novel, Nicolai, a lieutenant in the Dutch army, is sent to Africa on a military mission. Upon leaving a receives a letter from his father. Dear son, Don’t do anything stupid before your father has advised you to do so. Your mother asked me to write a wise letter. I have been looking for wisdom for half a day and haven’t found much. If you borrow a small amount from a bank you become the bank’s slave, but if you borrow a couple of millions and spend them as quickly as possible the bank becomes your slave. What I want to say is that you have to return from Africa in good health, and before you know it the world will be your slave [....] Signed with a kiss from your father. (88) The line, “If you borrow a small amount from a bank you become the bank’s slave, but if you borrow a couple of millions and spend them as quickly as possible the bank becomes your slave,” returns as the title of poem in Het leven van: “If I borrow enough money the bank becomes my slave” (12-3), which elaborates this theme. So both in the way that these poems are structured and in their subject matter, they refer to the structures of our economy, to the ever-continuing line of CEOs succeeding each other like words, to the distance between them introduced by bureaucracy, and giving and receiving as economical and poetical acts. Poem and economy map onto each other, as in another episode from De opvolging : Edward reads two of the beggar’s poems about presents. Of a holiday nothing remains, except for memories, and if some of them are bad I’d rather forget them all; if I get a present I’d rather get something that’s useful to me for a long time. If I may choose, I choose what I can use longest, long enough to partially forget that this was the present, because it feels bad when nothing is left of it. […] Giving away becomes destruction in the stock destruction economy [ voorraadvernie -tigings-economie ], that is a gift economy [ geschenkeneconomie ], encountering for the first time an economy in which there’s selling and buying on markets. Instead of destroying supplies someone can also quickly say that they aren’t worth anything anymore; if someone wants to take them I’d gladly give him something extra. In a stock destruction economy he is someone who each day wants to work more hours than his colleagues. If around a company there is a gift economy in which someone’s rank is determined and made visible by the gifts someone can give someone else, a company will be more often character- ized by an invisible or unclear system of ranks. (152) Two poems about gifts present two different economical models, described by Wijnberg with the terms “stock destruction economy” and “gift economy.” Here we immediately recall the opposition introduced by George Bataille’s work on the concept of expenditure in The Accursed Share , where a “general economy” would surpass the stock destruction economy based on scarcity (capitalism) and become a gift economy (potlatch) and an egalitarian (communist) society. These claims are made both on the level of the poems and in their discursive explanation. They follow each other and on each other. I would like to finish this introduction to Wijnberg’s writing with a translation from his novel De joden ( The Jews , 1999), which develops the story of Hitler abdicating as chancellor of the Third Reich, appointing philosopher Martin Heidegger as his successor. In a conversation with two Russian actor-spies, sent by Stalin to figure out the situation, philosopher Walter Benjamin describes the abdication scene. Maimon: You were there when Hitler resigned? Benjamin: In the room we’re right now. The desk and the chairs are new. After his resignation Hitler would like to take his furniture to his new house. Martin naturally agrees. It is a sunny day. Martin is very nervous and complains about the heat. Martin is wearing his best dark blue suit, not his professor’s robe. Hitler is wearing his uniform. We enter the room and Hitler gets up and embraces Martin. Martin is not very good at embracing. Hitler shakes his hand. Hitler’s cap is on the desk. The cap has a metal lining. Hitler has strong neck muscles. Hitler says: A man is unclean. He takes a bath. Does he make the bath water unclean? I say: a man is unclean. He steps into a river. A little further a man steps into the river; does he become unclean? Hitler nods. I say: a man is standing in music. Another man hears the music but also sees the first man moving on the beat of the music in a way that he is certain that the music would excite different feelings in him if he wouldn’t to see the first man. Hitler says: a man is clean, listens to music, is suddenly touched and he doesn’t know by what. The conversation ends in the way you know it ends. Hitler picks up his cap from the desk and puts it on Martin’s head. (73-4) Aware of the never ending debate on the question of Heidegger’s involvement in the Nazi regime, Wijnberg has the audacity to present the arguments of complicity in the religious terminology of cleanliness and uncleanliness, while at the same time recalling overtones of Hitler’s supposed love for Wagner, suggesting a relation between Benjamin and Hitler, and so on. The space of this introduction is to small to treat a novel like De joden , a reading of which together with passages from Philippe Lacoue-Labarthe's Heidegger, Art, and Politics: The Fiction of the Political , Jacques Derrida's Of Spirit , Christopher Fynsk's Heidegger: Thought and Historicity , and Avital Ronell's The Telephone Book would be extremely elucidating and potentially open new avenues in thinking Heidegger's emphasis on poetry after the fall of the Nazi empire. But at this point we will have to curb our curiosity and follow the poet himself. The themes of the relation between business and poetry, but also Chinese landscape painting, love, Indian and Japanese poetry, and Western philosophy are analyzed and assimilated in Wijnberg’s work without ever losing the clarity of expression. It may be that, according to Alain Badiou, the “Age of the Poets” is over, but its end (Paul Celan) has exactly brought a new balance between philosophy and poetry, and it is this playful, but nonetheless serious balance that makes one hope that one day Wijnberg’s complete oeuvre might become available to readers across the planet. Tiranë, Albania February 15, 2011 English translations (all of them translated by David Colmer, who is preparing an English collection of Wijnberg’s poems entitled Advanced Payment ): Poetry International Words Without Borders Green Integer Review from Het leven van ( The Life of ) THE LIFE OF KANT, OF HEGEL As if every day he takes a decision that is as good as when he’d been able to think about it all his life. The life of Kant, of Hegel, the days of the life of, select three or four of them. Tell what he has discovered during those days as if he were the last one who knew so little. Give me something that I can cancel against then I can prepare myself for it. The reward is that I may continue with what I’m doing, it doesn’t matter how long it takes. This has nothing to do with everything remaining the same if I say that I no longer want anything else. I wouldn’t be able to say in which one and the other occur in a way that I if I knew something to cancel that one against it wouldn’t be possible now. The stars above my head and being able to say what belongs to what if I’ve let them in. FOLLOWING MY HEART WITHOUT BREAKING THE RULES Observing the rules without observing the rules by going where the rules no longer apply. I could also observe the rules there by applying them to what at great distance may resemble what the rules are about. But why would I do that, not to confuse someone who is seeing me from a great distance? Behind this morning the morning prepares itself when the rules are everything I have. IF I BORROW ENOUGH MONEY THE BANK BECOMES MY SLAVE A bank lends me money, if I don’t pay it back they tell my boss that he has to pay them my salary. But they have to leave me enough to eat and sleep and an umbrella when it’s raining. They can also empty my house, the furniture isn’t worth a lot, but every little helps. Each morning I leave for work, if I don’t start early they’ll soon get someone else, no bank will lend me money when the sun is shining. My boss has given me a cat to raise as a dog. Of course I know that it won’t work out, but I’ve asked for a week—maybe the cat gets lucky, maybe I get lucky. My hands around a cup of coffee, before I leave for work, warm-empty, cold-empty, as if hidden in the mist over a lawn. What I make when there’s no work left for me, I’m ashamed to say how little it is. Once I’m outside I check it, if they watch out of the window they can see me doing it. Suppose it is so much that I’d stay counting for hours, it’s getting dark and I’m still there. They stay watching for a while once they’ve finished their work, but have to go home, I get that, sure, I could also go home and continue counting there. If it’s too little running back immediately won’t help, because nobody’s there anymore, and if I come back tomorrow I may have spent what’s missing tonight. Going somewhere where it’s warm enough to walk around without clothes during daytime, it helps me to know that something’s more there than here. For someone like me there’s work anywhere, it shouldn’t take a week to find work for me there. Three times work and a home close to work, I may choose one and try for a week whether I want to stay there. If at the end of the week I don’t want to stay I’m back on the next day, then it was a week’s holiday. RULES If that’s against a rule, it’s yet another one that I cannot observe, or only so briefly that I cannot re- member it later. Anyways the rules are only there to help me remember what I need in order to do better what I do. In that respect there’s no difference between the rules that I find in a book and the rules that I think of early in the morning. I know that because I’ve made a rule just now nothing has yet to observe it. CAUSE, SIGN A sign lets know what is going to happen, a cause lets it happen. If the sign also lets happen there is no reason to isolate it, because then I would isolate something only because it’s different for me. If I didn’t have to write this down myself, but would have secretaries to whom I could dictate it, I could to say more about it. If something is taken away from me I consider how it would be if the opposite had been taken from me. That is what causes or signifies what is farthest away from what is caused or signified by what has been taken away from me. note: For the translations of “The life of Kant, of Hegel” and “If I borrow enough money the bank becomes my slave” I was able to consult David Colmer’s wonderful translations. (shrink)

Two decades of research on euthanasia in the Netherlands have resulted into clear insights in the frequency and characteristics of euthanasia and other medical end-of-life decisions in the Netherlands. These empirical studies have contributed to the quality of the public debate, and to the regulating and public control of euthanasia and physician-assisted suicide. No slippery slope seems to have occurred. Physicians seem to adhere to the criteria for due care in the large majority of cases. Further, it has been shown (...) that the majority of physicians think that the euthanasia Act has improved their legal certainty and contributes to the carefulness of life-terminating acts. In 2005, eighty percent of the euthanasia cases were reported to the review committees. Thus, the transparency envisaged by the Act still does not extend to all cases. Unreported cases almost all involve the use of opioids, and are not considered to be euthanasia by physicians. More education and debate is needed to disentangle in these situations which acts should be regarded as euthanasia and which should not. Medical end-of-life decision-making is a crucial part of end-of-life care. It should therefore be given continuous attention in health care policy and medical training. Systematic periodic research is crucial for enhancing our understanding of end-of-life care in modern medicine, in which the pursuit of a good quality of dying is nowadays widely recognized as an important goal, in addition to the traditional goals such as curing diseases and prolonging life. (shrink)

Argumentation as the public exchange of reasons is widely thought to enhance deliberative interactions that generate and justify reasonable public policies. Adopting an argumentation-theoretic perspective, we survey the norms that should govern public argumentation and address some of the complexities that scholarly treatments have identified. Our focus is on norms associated with the ideals of correctness and participation as sources of a politically legitimate deliberative outcome. In principle, both ideals are mutually coherent. If the information needed for a correct deliberative (...) outcome is distributed among agents, then maximising participation increases information diversity. But both ideals can also be in tension. If participants lack competence or are prone to biases, a correct deliberative outcome requires limiting participation. The central question for public argumentation, therefore, is how to strike a balance between both ideals. Rather than advocating a preferred normative framework, our main purpose is to illustrate the complexity of this theme. (shrink)

In this paper, we examine how organizations’ impression management evolves in response to rising stakeholder pressures regarding organizations’ corporate responsibility initiatives. We conducted a comparative case study analysis over a period of 13 years for two organizations—Exxon and BP—that took extreme initial stances on climate change. We found that as stakeholder pressures rose, their IM tactics unfolded in four phases: advocating the initial stance, sensegiving to clarify the initial stance, image repairing, and adjusting the stance. Taken together, our analysis of (...) IM over these four phases provides three key insights about the evolution of IM in the face of rising pressures. First, when faced with stakeholder pressures, it seems that organizations do not immediately resort to conforming but tend to give in gradually when pressures increase and start to come from relatively powerful stakeholders. Second, evolution of IM seems to be characterized by path dependence, i.e., even as organizations’ positions evolve, they continue to show their conviction in their initial positions and try to convey that their subsequent positions flow logically from the previous ones. Finally, IM involves navigation between symbolism and substance, and companies tend to strive toward harmonizing their symbolic and substantive actions as stakeholder pressure increases. (shrink)

Introduction: The Dutch Euthanasia Act states that euthanasia is not punishable if the attending physician acts in accordance with the statutory due care criteria. These criteria hold that: there should be a voluntary and well-considered request, the patient’s suffering should be unbearable and hopeless, the patient should be informed about their situation, there are no reasonable alternatives, an independent physician should be consulted, and the method should be medically and technically appropriate. This study investigates whether physicians experience problems with these (...) criteria in medical practice.Methods: In 2006, questionnaires were sent to a random, stratified sample of 2100 Dutch physicians . Physicians were asked about problems in their decision-making related to requests for euthanasia or assisted suicide after enforcement of the 2002 Euthanasia Act.Results: Of all physicians who had received a request for euthanasia or assisted suicide , 25% had experienced problems in the decision-making with regard to at least one of the criteria of due care. Physicians who had experienced problems mostly indicated to have had problems related to evaluating whether or not the patient’s suffering was unbearable and hopeless and whether or not the patient’s request was voluntary or well considered .Discussion: Physicians in The Netherlands most frequently reported problems related to aspects in which they have to evaluate the patient’s subjective perspective. However, it can be questioned whether placing emphasis on these subjective aspects is an adequate fulfilment of the duties imposed on physicians, as laid down in the Dutch Euthanasia Act. (shrink)

About one third of patients with epilepsy have seizures refractory to the medical treatment. Electrical stimulation mapping is the gold standard for the identification of “eloquent” areas prior to resection of epileptogenic tissue. However, it is time-consuming and may cause undesired side effects. Broadband gamma activity recorded with extraoperative electrocorticography during cognitive tasks may be an alternative to ESM but until now has not proven of definitive clinical value. Considering their role in cognition, the alpha and beta bands could further (...) improve the identification of eloquent cortex. We compared gamma, alpha and beta activity, and their combinations for the identification of eloquent cortical areas defined by ESM. Ten patients with intractable focal epilepsy participated in a delayed-match-to-sample task, where syllable sounds were compared to visually presented letters. We used a generalized linear model approach to find the optimal weighting of each band for predicting ESM-defined categories and estimated the diagnostic ability by calculating the area under the receiver operating characteristic curve. Gamma activity increased more in eloquent than in non-eloquent areas, whereas alpha and beta power decreased more in eloquent areas. Diagnostic ability of each band was close to 0.7 for all bands but depended on multiple factors including the time period of the cognitive task, the location of the electrodes and the patient’s degree of attention to the stimulus. We show that diagnostic ability can be increased by 3–5% by combining gamma and alpha and by 7.5–11% when gamma and beta were combined. We then show how ECoG power modulation from cognitive testing can be used to map the probability of eloquence in individual patients and how this probability map can be used in clinical settings to optimize ESM planning. We conclude that the combination of gamma and beta power modulation during cognitive testing can contribute to the identification of eloquent areas prior to ESM in patients with refractory focal epilepsy. (shrink)

© 2015 Elsevier Inc.Postnatal organogenesis occurs in an immune competent environment and is tightly controlled by interplay between positive and negative regulators. Innate immune cells have beneficial roles in postnatal tissue remodeling, but roles for the adaptive immune system are currently unexplored. Here we show that adaptive immune responses participate in the normal postnatal development of a non-lymphoid epithelial tissue. Since the mammary gland is the only organ developing predominantly after birth, we utilized it as a powerful system to study (...) adaptive immune regulation of organogenesis. We found that antigen-mediated interactions between mammary antigen-presenting cells and interferon-γ -producing CD4+ T helper 1 cells participate in MG postnatal organogenesis as negative regulators, locally orchestrating epithelial rearrangement. IFNγ then affects luminal lineage differentiation. This function of adaptive immune responses, regulating normal development, changes the paradigm for studying players of postnatal organogenesis and provides insights into immune surveillance and cancer transformation. Plaks et al. (shrink)

Instruction in peer assessment of complex task performance may cause high cognitive load, impairing learning. A stepwise instructional strategy aimed at reducing cognitive load was investigated by comparing it with a combined instructional strategy in an experiment with 128 secondary school students (mean age 14.0?years; 45.2% male) with the between-subjects factor instruction (stepwise, combined). In the stepwise condition, study tasks in Phase 1 were domain-specific and study tasks in Phase 2 had both domain-specific and peer assessment components. In the combined (...) condition, these two components were present in all tasks in both phases. Final performance (i.e. speed and accuracy in domain-specific skills and peer assessment skills) showed no significant differences, but performance improved more from Phase 1 to Phase 2 in the stepwise condition than in the combined condition. The results suggest that, with complex study tasks, it might be beneficial to teach domain-specific skills before peer assessment skills. (shrink)

BackgroundThe Netherlands is one of the few countries where euthanasia is legal under strict conditions. This study investigates whether Dutch newspaper articles use the term ‘euthanasia’ according to the legal definition and determines what arguments for and against euthanasia they contain.MethodsWe did an electronic search of seven Dutch national newspapers between January 2009 and May 2010 and conducted a content analysis.ResultsOf the 284 articles containing the term ‘euthanasia’, 24% referred to practices outside the scope of the law, mostly relating to (...) the forgoing of life-prolonging treatments and assistance in suicide by others than physicians. Of the articles with euthanasia as the main topic, 36% described euthanasia in the context of a terminally ill patient, 24% for older persons, 16% for persons with dementia, and 9% for persons with a psychiatric disorder. The most frequent arguments for euthanasia included the importance of self-determination and the fact that euthanasia contributes to a good death. The most frequent arguments opposing euthanasia were that suffering should instead be alleviated by better care, that providing euthanasia can be disturbing, and that society should protect the vulnerable.ConclusionsOf the newspaper articles, 24% uses the term ‘euthanasia’ for practices that are outside the scope of the euthanasia law. Typically, the more unusual cases are discussed. This might lead to misunderstandings between citizens and physicians. Despite the Dutch legalisation of euthanasia, the debate about its acceptability and boundaries is ongoing and both sides of the debate are clearly represented. (shrink)