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)

Contemporary discussion concerning institutions focus on, and mostly accept, the Searlean view that institutional objects, i.e. money, borders and the like, exist in virtue of the fact that we collectively represent them as existing. A dissenting note has been sounded by Smit et al. (Econ Philos 27:1–22, 2011), who proposed the incentivized action view of institutional objects. On the incentivized action view, understanding a specific institution is a matter of understanding the specific actions that are associated with the institution and (...) how we are incentivized to perform these actions. In this paper we develop the incentivized action view by extending it to institutions like property, promises and complex financial organisations like companies. We also highlight exactly how the incentivized action view differs from the Searlean view, discuss the method appropriate to such study and discuss some of the virtues of the incentivized action view. (shrink)

What does being money consist in? We argue that something is money if, and only if, it is typically acquired in order to realise the reduction in transaction costs that accrues in virtue of agents coordinating on acquiring the same thing when deciding what thing to acquire in order to exchange. What kinds of things can be money? We argue against the common view that a variety of things (notes, coins, gold, cigarettes, etc.) can be money. All monetary systems are (...) best interpreted as implementing the same basic protocol. Money, i.e. the thing that we coordinate on acquiring in order to lower our transaction costs, is, in all cases, a set of positions on an abstract mathematical object, namely a relative ratio scale. The things that we ordinarily call ‘money’ are merely records of positions on such a scale. (shrink)

Objectives: To determine the effects of risk and payment on subjects’ willingness to participate, and to examine how payment influences subjects’ potential behaviours and risk evaluations.Methods: A 3 × 3 , between subjects, completely randomised factorial design was used. Students enrolled at one of five US pharmacy schools read a recruitment notice and informed consent form for a hypothetical study, and completed a questionnaire. Risk level was manipulated using recruitment notices and informed consent documents from hypothetical biomedical research projects. Payment (...) levels were determined using the payment models evaluated by Dickert and Grady as a guide. Five dependent variables were assessed in the questionnaire: willingness to participate, willingness to participate with no payment, propensity to neglect to tell about restricted activities, propensity to neglect to tell about negative effects, and risk rating.Results: Monetary payment had positive effects on respondents’ willingness to participate in research, regardless of the level of risk. However, higher monetary payments did not appear to blind respondents to the risks of a study. Payment had some influence on respondents’ potential behaviours regarding concealing information about restricted activities. However, payment did not appear to have a significant effect on respondents’ propensity to neglect to tell researchers about negative effects.Conclusions: Monetary payments appear to do what they are intended to do: make subjects more willing to participate in research. Concerns about payments blinding subjects to risks could not be substantiated in the present study. However, the findings do raise other concerns—notably the potential for payments to diminish the integrity of a study’s findings. Future research is critical to make sound decisions about the payment of research subjects. (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)

Joseph Almog pointed out that Kripkean causal chains not only exist for names, but for all linguistic items (Almog 1984: 482). Based on this, he argues that the role of such chains is the presemantic one of assigning a linguistic meaning to the use of a name (1984: 484). This view is consistent with any number of theories about what such a linguistic meaning could be, and hence with very different views about the semantic reference of names. He concludes that (...) the causal theory is ‘rather trivial’ (1984: 487). In this paper I argue that Almog is correct to hold that the causal theory is trivial, but, contra Almog, argue that the triviality of the existence of causal chains is not a matter of such chains having a presemantic role in assigning linguistic meanings to utterances. Instead, such triviality is due to the fact that the causal theory reflects no more than a truism about the epistemology of convention acquisition. (shrink)

Russell claims that ordinary proper names are eccentric, i.e. that the semantic referent of a name is determined by the descriptive condition that the individual utterer of the name associates with the name. This is deeply puzzling, for the evidence that names are subject to interpersonal coordination seems irrefutable. One way of making sense of Russell’s view would be to claim that he has been systematically misinterpreted and did not, in fact, offer a semantic theory at all. Such a view (...) is put forward in Sainsbury Departing from Frege, Routledge, London, 2002). Sainsbury claims that Russellian descriptivism is not the theory that the thought in the mind of the speaker determines the semantic reference of a name, but simply a theory about the thought in the mind of the speaker using a name. I argue that the truth is subtly different, and points the way towards an intuitive explanation of Russell’s eccentricity. (shrink)

I-theories of bare demonstratives take the semantic referent of a demonstrative to be determined by an inner state of the utterer. E-theories take the referent to be determined by factors external to the utterer. I argue that, on the Standard view of communication, neither of these theories can be right. Firstly, both are committed to the existence of conventions with superfluous content. Secondly, any claim to the effect that a speaker employs the conventions associated with these theories cannot have any (...) content, i.e. nothing can count as following these conventions. Bare demonstratives may well not be devices of semantic reference at all, i.e. may not actually contribute a referent to the proposition semantically expressed by an utterance. (shrink)

Declarations like “this meeting is adjourned” make certain facts the case by representing them as being the case. Yet surprisingly little attention has been paid to the mechanism whereby the utterance of a declaration can bring about a new state of affairs. In this paper, we use the incentivization account of institutional facts to address this issue. We argue that declarations can serve to bring about new states of affairs as their utterance have game theoretical import, typically in virtue of (...) the utterer signaling a commitment to act in an incentive-changing way. (shrink)

1. Introduction . In the chapter which he devotes to the applications of his principle of individual liberty, Mill considers the question ‘how far liberty may legitimately be invaded for the prevention of crime, or of accident’. On the latter topic, he writes:—‘… it is a proper office of public authority to guard against accidents. If either a public officer or anyone else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were (...) no time to warn him of his danger, they might seize him and turn him back, without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river.”. (shrink)

Moral conflicts occur in theories that involve more than one principle. I examine basic ways of dealing with moral dilemmas in medical ethics and in ethics generally, and propose a different approach based on a principle I call the "mutuality principle". It is offered as an addition to Tom Beauchamp and James Childress' principlism. The principle calls for the mutual enhancement of basic moral values. After explaining the principle and its strengths, I test it by way of an examination of (...) three responses—in the recent Festschrift for Dr Raanon Gillon—to a case involving parental refusal of a blood transfusion. The strongest response is the one that comes closest to the requirements of the mutuality principle but yet falls short. I argue that the mutuality principle provides an explicit future orientation in principlism and gives it greater moral coherence. (shrink)

In our earlier work, we argued, contra Searle, that institutional facts can be understood in terms of non-institutional facts about actions and incentives. Butchard and D’Amico claim that we have misinterpreted Searle, that our main argument against him (“the circularity objection”) has no merit and that our positive view cannot account for institutional facts created via joint action. We deny all three charges.

We propose a new picture of nature in which there are only two fundamental universal constantsè ē (≡e/c) andh(≡ħ/c). Our theory is developed within the framework of a new four-dimensional symmetry which is constructed on the basis of the Poincaré-Einstein principle of relativity for the laws of physics and the Newtonian concept of time. We obtain a new space-light transformation law, a velocity-addition law, and so on. In this symmetry scheme, the speed of light is constant and is completely relative. (...) The new theory is logically self-consistent, and it moreover is in agreement with all previously established experimental facts, such as the “lifetime dilatation” of unstable particles, the Michelson-Morley experiment, etc. There is a difference relative to the usual theory, though, in that our theory predicts a new law for the Dopplerfrequency shift, which can be tested experimentally by measuring the second-order frequency shift. (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)

Human conflict and its resolution is obviously a subject of great practical importance. Equally obviously, it is a vast subject, ranging from total war at one end of the spectrum to negotiated settlement at its other end. The literature on the subject is correspondingly vast and, in recent times, technical, thanks to the valuable contributions made to it by game theorists, economists, and writers on industrial and international relations. In this essay, however, I shall discuss only one familiar form of (...) conflict-resolution. There is room for such a discussion, because philosophers have lately neglected compromise, despite the interest shown in it by the aforementioned experts, and despite the classic treatments of it by Halifax, Burke and Morley. Truly, ‘…compromise is not so widely discussed by philosophers as one might expect’, and ‘…the idea of compromise has been largely neglected by Anglo-American jurisprudence’. (shrink)

We discuss quantum electrodynamics within the framework of a new four-dimensional symmetry in which the concept of time, the propagation of light, and the transformation property of many physical quantities are drastically different from those in special relativity. However, they are consistent with experiments. The new framework allows for natural developments of additional concepts. Observers in different frames may use the same grid of clocks, located in any one of the frames, and hence have a universal time.

Philosophy is experiencing a resurgence of property (PD) and generic substance dualism (SD). One important argument for SD that has played a role in this resurgence is some version of a modal argument. Until recently, premise (3) of the argument (Possibly, I exist, and no wholly physical objects exist.) has garnered most of the attention by critics. However, more recently, the focus has also been on (2) (Wholly physical objects are essentially, wholly, and intrinsically physical and wholly spiritual substances are (...) essentially, wholly, and intrinsically immaterial.). Andrew Bailey has provided one of the best criticisms of (2) on offer. In what follows, I present and clarify one form of the argument and defend premise (2) by responding to important defeaters proffered by Andrew Bailey and his contingent physicalism. (shrink)

Kripke (1977) views Donnellan's (1966) misdescription cases as cases where semantic reference and speaker's reference come apart. Such cases, however, are also cases where semantic reference conflicts with a distinct species of reference I call "public reference", i.e. the object that the cues publicly available at the time of utterance indicate is the speaker's referent of the utterance. This raises the question: do the misdescription cases trade on the distinction between semantic reference and speaker's reference, or the distinction between semantic (...) reference and public reference? I argue that Kripke's own construal in terms of semantic reference and speaker's reference is at best incomplete, and probably wrong. I also explain the general importance of the notion of 'public reference'. (shrink)

Semantic theories that violate semantic innocence, that is require reference shifts when terms are embedded in ‘that’ clauses and the like, are often challenged by producing sentences where an anaphoric expression, while not itself embedded in a context in which reference shifts, is anaphoric on an antecedent expression that is embedded in such a context. This, in conjunction with a widely accepted principle concerning unproblematic anaphora (the ‘Principle of Anaphoric Reference’), is used to show that such reference shifting has absurd (...) consequences. We show that it is the widely accepted principle concerning anaphora that is to be blamed for these consequences and not the supposed sin of reference shifting. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Hume's Reading of Bayle: An Inquiry into the Source and Role of the Memoranda J. P. PITTION MY PURPOSE IN THIS PAPER is to discuss an aspect of Hume's reading of Pierre Bayle, the French "Philosopher of Rotterdam. ''1 I am not concerned here with the identification of Hume's direct borrowings from Bayle in the Treatise, nor with the much wider problem of a probable influence of Bayle on (...) Hume. It is indeed possible to identify in the Treatise a number of specific points taken from Bayle. Kemp Smith listed four at least: the account of skepticism, the discussion of Spinoza, the discussion of animal intelligence, and the criticism of the argument from design. 2 All of these come from Bayle's Dictionnaire. External evidence confirms that in 1732 Hume had a work of Bayle, presumably a copy of the Dictionnaire. Other borrowings from Bayle have been identified in the Treatise and in Hume's other works. This is no surprise, for in the eighteenth century Bayle's Dictionnaire was used as it was intended in the first instance, that is, as a reference work. In detailing the borrowings from Bayle, Kemp Smith also touched upon the broader question of influence when he stated that Hume's Pyrrhonism, particularly in relation to his treatment of religion, may also come from Bayle. Many recent scholars have followed suit. A problem of influence however is always a difficult one, and particularly so in this case. There was, as R. H. Popkin has pointed out, a broad awareness of continental skepticism among British philosophers of the eighteenth century. 3 However, apropos Berkeley, A. A. Luce has remarked that the trouble with eighteenth-century continental skepticism was that it had various objectives and took various forms. 4 This is true of Bayle himself. Within skepticism Bayle's position was known for its extremism, and it was this extremism that brought him notoriety. During the eighteenth century Bayle was the philosopher who promoted a systematic use of the Pyrrhonic mode of argument. He was acknowledged above all for having set up a double paradox: that any attempt at a rational theodicy must lead to Manicheism and that to argue for a rationalist Christian ethics is to argue the case of an atheistic one as well. In other words, in the early eighteenth century Bayle played the part of a contemporary Pyrrho and Zeno of Elea: he was known for this double stance, and it is for ' This is a slightly revised version of a paper read at the McGill Bicentennial Hume Conference, held at McGiUUniversity, Montreal, in September, 1976. I wishto offer my thanks to Professors H. M. Bracken and D. F. Norton for their assistanceon this version, and I am particularly grateful to Professor James Moore of Concordia University for his comments on the interpretation put forward here in relation to section III of the Memoranda (seen. 8). 2N. KempSmith, The Philosophy of David Hume (NewYork, 1964),pt. III, chap. XIV, app. C. 3 "David Hume and the Pyrrhonian Controversy," Review of Metaphysics VI (September, 1952):65-81. 4 The Dialectic of Immaterialisrn (London, 1963),p. 67. [373] 374 HISTORY OF PHILOSOPHY this stance that he was mentioned. It is doubtful whether many of those who do refer to Bayle during this period understood him beyond these terms, whether they sought to understand, or whether they even bothered to read Bayle's lengthy arguments. It is clear that few really grasped his complex, often ambiguous objectives. Mention of a Baylian position by an eighteenth-century writer is therefore no guarantee that the writer has actually read Bayle's works: Bayle is a sort of figurehead for Pyrrhonism, Manicheism, or often even atheism, but one can doubt that there is behind the mention of these basic positions any serious reflection on his thought. There are exceptions of course. Luce and H. M. Bracken have shown that Bayle played a seminal role in the formation of Berkeley's thought? But as a rule, knowledge of Bayle among writers of the Enlightenment was vague; references to him, nonspecific. In most cases it is scarcely possible to speak of an influence. My aim in this... (shrink)

Death cannot be mastered through a metaphysics of efficiency that interprets all actions in terms only of cause and effect, but it can be transcended if we leave the frame open to death’s ambiguityIn the second of this two part series, I describe how in shifting our frames from one of human purpose and meaning to one of efficiency, we shift the possible answers we get to our questions about voluntary active euthanasia and physician assisted suicide . Thus, by placing (...) VAE/PAS within the frame of efficiency, we narrow our focus to the final effect in the world of cause and effect—namely death. Thus, in ensconcing euthanasia within a legal framework meant to instrumentally and efficiently control euthanasia, we are in fact narrowing our focus on death. Thus, in legalising VAE/PAS we are not just adding one choice to a panoply of other choices, we are in fact changing the nature of all choices, for each choice conditions all others. We should therefore live with the lie that VAE/PAS do not happen as opposed to living with the lie that through efficient legal control we protect patients from medical dominance.AN ANECDOTESeveral years ago an acquaintance told me about a terrible situation in which he found himself during the Vietnam war. He was Green Beret—one of the elite special forces corps of the US army. He was in an area that was officially off limits to the US. His unit came under heavy fire and a buddy was shot in several places but was still alive. His comrade was in serious pain, but what scared him the most was that he might die in the jungle, be eaten by a wild animal, or be captured by the enemy. There was no way to get him out. The wounded soldier …. (shrink)

The structures of space and time associated with various four-dimensional symmetries are constructed and examined. It is interesting that some of these four-dimensional symmetries are compatible with the existence of an aether in the Einstein sense. There are two classes of infinitely many four-dimensional symmetries that cannot be ruled out by previous experiments. We discuss some laser experiments that test these two classes of four-dimensional symmetries. An interesting connection between the nonclassical aether and gravity through the equality of inertial and (...) gravitational mass is explored. (shrink)

Traditional descriptivism and Kripkean causalism are standardly interpreted as rival theories on a single topic. I argue that there is no such shared topic, i.e. that there is no question that they can be interpreted as giving rival answers to. The only way to make sense of the commitment to epistemic transparency that characterizes traditional descriptivism is to interpret Russell and Frege as proposing rival accounts of how to characterize a subject’s beliefs about what names refer to. My argument relies (...) on a development of the distinction between speaker’s reference and semantic reference. (shrink)

A new theory of four-dimensional symmetry introduced by Hsu has been criticized as logically inconsistent. We answer the criticisms that have been raised and show that in fact this theory is not logically inconsistent.

We explore the mathematical structure and the physical implications of a general four-dimensional symmetry framework which is consistent with the Poincaré—Einstein principle of relativity for physical laws and with experiments. In particular, we discuss a four-dimensional framework in which all observers in different frames use one and the same grid of clocks. The general framework includes special relativity and a recently proposed new four-dimensional symmetry with a nonuniversal light speed as two special simple cases. The connection between the properties of (...) light propagation and the convention concerning clock systems is also discussed, and is seen to be nonunique within the four-dimensional framework. (shrink)

Moral dilemmas, or moral conflicts, present a leading problem in Ethics. Ross calls them the problem of conflicting prima facie moral obligations. Lemmon calls them ‘moral dilemmas’, and Sinnott-Armstrong in his recent book discusses them thoroughly and provides extensive references to relevant literature.