Automatic moving object detection and tracking is very important task in video surveillance applications. In the present work the well known background subtraction model and use of Gaussian Mixture Models have been used to implement a robust automated single object tracking system. In this implementation, background subtraction on subtracting consecutive frame-by-frame basis for moving object detection is done. Once the object has been detected it is tracked by employing an efficient GMM technique. After successful completion of tracking, moving object recognition (...) of those objects using well known Principal Component Analysis, which is used for extracting features and Manhattan based distance metric is used for subsequent classification purpose. The system is capable of handling entry and exit of an object. Such a tracking system is cost effective and can be used as an automated video conferencing system and also has applications like human tracking, vehicles monitoring, and event recognition for video surveillance. The proposed algorithm was tested on standard database on complex environments and the results were satisfactory. (shrink)

It is generally wrong to manipulate. One leading reason is because manipulation interferes with autonomy, in particular the component of autonomy called ‘independence’, that is, freedom from intentional control by others. Manipulative health promotion would therefore seem wrong. However, manipulative techniques could be used to counter-manipulation, for example, playing on male fears of impotence to counter ‘smoking is sexy’ advertisements. What difference does it make to the ethics of manipulation when it is counter-manipulation? This article distinguishes two powerful defences of (...) counter-manipulative health promotion: that the counter-manipulation would prevent manipulation occurring, leaving people unmanipulated; and that the counter-manipulation would make people healthier without being any more manipulated than they would otherwise be. The article explains how counter-manipulation might work and the limits to its scope. The upshot is that counter-manipulative health promotion could respect the independence people are owed in virtue of their autonomy. However, autonomy is not the only consideration, and the article discusses further potential problems. Counter-manipulative health promotion might be misapplied, it might undermine trust, it might infringe on some norms for role behaviour and it might encourage a regrettable social practice. These objections are likely to be decisive against the counter-manipulation in some but not all cases. (shrink)

Gametes, tissue, and organs can be taken from the dying or dead for reproduction, transplantation, and research. Whole bodies as well as parts can be used for teaching anatomy. While these uses are diverse, they have an ethical consideration in common: the claims of the people whose bodies are used. Is some use permissible only when people have consented to the use, actually wanted the use, would have wanted the use, not opposed the use, or what? The aim of this (...) article is to make progress in answering these questions. Initially I assume knowledge of people’s desires in order to test whether consent is directly required by their rights without worrying about mistaken uses against their wishes. I claim consent is not directly required by people’s rights. If we know people wanted or would want a use, their rights permit the use, but if we know they wanted or would want not to be used, their rights do not permit the use. The knowledge assumption is then dropped and the question becomes how to decide what to do when the wishes of rightholders are not known. I suggest working out what to do when wishes are known and then adjusting, on the basis of whatever evidence there is, for probability and strength of desire. There are other considerations too, for instance about default rules. The key general comment here is that, in setting rules, the costs to rightholders in not getting what they want needs to be taken into account. The final section tries to show that, in setting these rules, mistaken uses are not to be taken as worse than mistaken failure to use. (shrink)

People often have strong views about being the subjects of research after their deaths. Should these views be given any weight and, if so, how much? How could we find out what the views are and what should we do if we cannot? This paper defends the idea of posthumous interests and discusses the significance of those interests for research ethics. It argues that we can be guided by a symmetry between the interests of living and dead people and uses (...) posthumous privacy as an example. It also claims that the weight of those interests might not decline even over long periods of time. The arguments have important implications for the ethics of (amongst others) biomedical, archaeological, anthropological, historical, and sociological research. (shrink)

It is claimed by the future like ours anti-abortion argument that since killing adult humans is wrong because it deprives them of a future of value and the fetus has a future of value, killing fetuses is wrong in the same way that killing adult human beings is wrong. In The morality of abortion and the deprivation of futures (this journal, April 2000) I argued that the persuasive power of this argument rests upon an equivocation on the term “future of (...) value”. If the expression means “a potential future of value” then the moral claim is implausible because people do not in general have rights to what they need to fulfill their potential; if the expression means “self-represented future of value” then the argument fails because the fetus does not represent its future. Under no interpretation is the argument sound. In Deprivations, futures and the wrongness of killing (this journal, December 2001) Donald Marquis, author of the future like ours argument, responds at length to this objection. In the present essay the focus of the debate shifts to the proper interpretation of the right not to be killed. Donald Marquis argues that this liberty right entails the welfare right to the means necessary to sustain life; I argue that the right not to be killed does not entail unlimited welfare rights. On Marquis's view, the right not to be killed confers upon the fetus the right to whatever it takes to sustain life; on the view I defend, the right not to be killed does not confer upon the fetus or anyone else the right to another person's body. On Marquis's view, abortion is almost never permissible; on my view abortion is almost always permissible. (shrink)

Este artículo pasa revista a las principales contribuciones de Víctor Sánchez de Zavala a la lingüística y a la filosofía, a traves del análisis de las ideas centrales de su pensamiento expuestas en sus libros y artículos. Despues de una breve introdueción a su biografía académica, se analiza y explica el papel esencial que Víctor Sánchez de Zavala tuvo en la introducción de la gramatíca generativa en España. Se examina en este sentido su trabajo corno profesor, editor, traductor y escritor (...) y la Iínea central de su trabajo lingüístico. La segunda parte del artículo analiza las hipótesis fundamentales de la teoda pragmática desarrollada por este filósofo y lingüísta a lo largo de toda su vida. En esta sección, por otra parte, se presenta y discute su novedoso enfoque global de la actividad lingüística expuesta en su obra póstuma, de reciente aparieión: Hacia la pragmática (psicoIógica), Madrid, Visor.This paper reviews Víctor Sánehez de Zavala’s main contributions to linguistics and philosophy through a close look at the central ideas developed in his articles and books. In the first part, after a brief introduction to his academic biography, the leading role of Víctor Sánchez de Zavada in the introduction of formal linguistics in Spain is analysed and justified. His work as editor, professor, translator and writer is examined through his main publications. The second part of the paper is devoted to provide an analysis of the central hypotheses on which this theory of psychologicaI pragmatics is based. Furthermore, this second part examines his novel and global approach to linguistic activity, developed in his posthumous book Towards a psychological pragmatics. (shrink)

This paper gives a self-defence account of the scope and limits of the justified use of compulsion to control contagious disease. It applies an individualistic model of self-defence for state action and uses it to illuminate the constraints on public health compulsion of proportionality and using the least restrictive alternative. It next shows how a self-defence account should not be rejected on the basis of past abuses. The paper then considers two possible limits to a self-defence justification: compulsion of the (...) non-culpable and over-inclusive compulsion. The paper claims that objections to compelling the non-culpable do not greatly restrict the scope of the self-defence justification. The over-included are, however, innocent bystanders, and methods such as compulsory quarantine, vaccination, and screening are not justified in self-defence. (shrink)

There is general acknowledgement that both the anterior cingulate and orbitofrontal cortex are implicated in reinforcement-guided decision making, and emotion and social behaviour. Despite the interest that these areas generate in both the cognitive neuroscience laboratory and the psychiatric clinic, ideas about the distinctive contributions made by each have only recently begun to emerge. This reflects an increasing understanding of the component processes that underlie reinforcement- guided decision making, such as the representation of reinforcement expectations, the exploration, updating and representation (...) of action values, and the appreciation that choices are guided not just by the prospect of reward but also by the costs that action entails. Evidence is emerging to suggest that the anterior cingulate and orbitofrontal cortex make distinct contributions to each of these aspects of decision making. (shrink)

Ronald Dworkin argues on the basis of a theory of well-being that critical paternalism is self-defeating. People must endorse their lives if they are to benefit. This is the endorsement constraint and this paper rejects it. For certain kinds of important mistakes that people can make in their lives, the endorsement constraint is either incredible or too narrow to rule out as much paternalism as Dworkin wants. The endorsement constraint cannot be interpreted to give sensible judgements when people change their (...) minds about the value of their lives. And the main argument for the endorsement constraint, which is based on the value of integrity, does not support Dworkin's anti-paternalism. (shrink)

Background: Thrombolytic drugs to treat an acute ischaemic stroke reduce the risk of death or major disability. The treatment is, however, also associated with an increased risk of potentially fatal intracranial bleeding. This confronts the patient with the dilemma of whether or not to take a risk of a serious side effect in order to increase the likelihood of a favourable outcome. Objective: To explore acute stroke patients’ perception of risk and willingness to accept risks associated with thrombolytic drug treatment. (...) Design: Eleven patients who had been informed about thrombolytic drug treatment and had been through the process of deciding whether or not to participate in a thrombolytic drug trial went through repeated qualitative, semistructured interviews. Results: Many patients showed a limited perception of the risks connected with thrombolytic drug treatment. Some perceived the risk as not relevant to them and were reluctant to accept that treatment could cause harm. Others seemed to be aware that treatment would mean exposure to risk. The patients’ willingness to take a risk also varied substantially. Several statements revealed ambiguity and confusion about being involved in a decision about treatment. The patients’ reasoning about risk was put into the context of their health-related experiences and life histories. Several patients wanted the doctor to be responsible for the decisions. Conclusion: Acute stroke patients’ difficulties in perceiving and processing information about risk may reduce their ability to be involved in clinical decisions where risks are involved. (shrink)

Governments can try to counter obesity through preventive regulations such as sugar taxes, which appear to raise costs or reduce options for consumers. Would the regulations improve the welfare of adult consumers? The regulations might improve choice sets through a mechanism such as reformulation, but the scope for such improvement is limited. Otherwise, a paternalistic argument must be made that preventive regulations would improve welfare despite reducing choice. This paper connects arguments about obesity, health, and choice to a philosophically plausible (...) view of welfare. On the negative side, two errors to avoid are failing to see the limited value of health and thinking that findings of irrationality would alone settle arguments about welfare. On the positive side, preventive regulations could make people better-off if welfare is the satisfaction of preferences and if preventive regulations could better satisfy preferences by overcoming certain forms of irrationality. The leading evidence is from widespread attempts to lose weight. However, at least for the United States, most adults are not trying to lose weight, and that casts doubt on whether they would benefit from preventive regulations. If they would not, that seems a strong albeit not decisive reason against these regulations. (shrink)

Ontological and methodological constraints on a theory of cognition that would generalize across species are identified. Within these constraints, ecological arguments for animal-environment mutuality and reciprocity and the necessary specificity of structured energy distributions to environmental facts are developed as counterpoints to the classical doctrines of animal-environment dualism and intractable nonspecificity. Implications of and for a cognitive theory consistent with Gibson's programme of ecological psychology are identified and contrasted with contemporary cognitivism.

A unifying theory of general anesthetic-induced unconsciousness must explain the common mechanism through which various anesthetic agents produce unconsciousness. Functional-brain-imaging data obtained from 11 volunteers during general anesthesia showed specific suppression of regional thalamic and midbrain reticular formation activity across two different commonly used volatile agents. These findings are discussed in relation to findings from sleep neurophysiology and the implications of this work for consciousness research. It is hypothesized that the essential common neurophysiologic mechanism underlying anesthetic-induced unconsciousness is, as with (...) sleep-induced unconsciousness, a hyperpolarization block of thalamocortical neurons. A model of anesthetic-induced unconsciousness is introduced to explain how the plethora of effects anesthetics have on cellular functioning ultimately all converge on a single neuroanatomic/neurophysiologic system, thus providing for a unitary physiologic theory of narcosis related to consciousness. (shrink)