The language of manuals may be used to discuss inference in measurement in a general experimental context. Specializing to the context of the frame manual for Hilbert space, this inference leads to state dominance of the inferred state from partial measurements; this in turn, by Sakai's theorem, determines observables which are described by positive operator-valued measures. Symmetries are then introduced, showing that systems of covariance, rather than systems of imprimitivity, are natural objects to study in quantum mechanics. Experiments measuring different (...) polarization components simultaneously are reexamined in this language. Finally, implications of the Naimark extension theorem for the manual approach are investigated. (shrink)

The internal paradoxes in the quantum measurement scheme related to violation of conservation laws, changes in entropy, absence of a dynamic description of collapse, Wigner's friend, as well as the paradox of violation of causality in the EPR experiment are shown to be partially circumvented in the measurement scheme of stochastic quantum mechanics.

Symmetries are introduced into the convexity approach to physics. This allows one to make connections between classical and quantum theories by exploiting the properties of quantum mechanics on phase space. The measurement problem is discussed and many of the known no-go theorems are shown not to apply. Finally, hidden variable theories exhibiting these physical symmetries are shown to have a certain required group structure, if they exist at all.

The encounter between Socrates and Thrasymachus in Republic I is notoriously baffling. Most of what is said seems straightforward, and the issues at stake are ones of common concern, but the argument remains elusive. The purpose of this paper is to investigate the nature and grounds of this elusiveness, and to show that some of it can be dispelled by a sufficiently free-ranging exegesis that bears in mind the general character of Plato’s writing.

, WOKING PREFATORY NOTE THIS essay is an attempt to follow critically the development of Kants metaphysical thought with special reference to the concept of God ...

Aim: To improve clinical and ethical understanding of patient preferences for information and involvement in decision making.Objectives: To develop and evaluate a clinical tool to elicit these preferences and to consider the ethical issues raised.Design: A before and after study.Setting: Three UK hospices.Participants: Patients with advanced life-threatening illnesses and their doctors.Intervention: Questionnaire on information and decision-making preferences.Main outcome measures: Patient-based outcome measures were satisfaction with the amount of information given, with the way information was given, with family or carer information, (...) and confidence about future decision making. Doctor-based outcome measures were confidence in matching information to patient preference, matching family or carer communication to patient preference, knowing patient preferences and matching future decision making with patient preference.Results: Of 336 admissions, 101 patients completed the study . Patient satisfaction with the way information was given and family communication improved after introduction of the tool. Doctor confidence improved across all outcome measures .Conclusions: Patient satisfaction and doctor confidence were improved by administering the questionnaire, but complex ethical issues were raised by implementing and applying this research. The balance of ethical considerations were changed by advanced life-threatening illness, because there is increased risk of harm through delivery of information discordant with the patient’s own preferences. The importance of truly understanding patient preferences towards the end of life is highlighted by this study. (shrink)

F. E. Sparshott; IV—Avowals and their Uses, Proceedings of the Aristotelian Society, Volume 62, Issue 1, 1 June 1962, Pages 63–76, https://doi.org/10.1093/arist.

Controversy and activism have long been linked to the subject of primate research. Even in the midst of raging ethical debates surrounding fertility treatments, genetically modified foods and stem-cell research, there has been no reduction in the campaigns of activists worldwide. Plying their trade of intimidation aimed at ending biomedical experimentation in all animals, they have succeeded in creating an environment where research institutions, often painted as guilty until proven innocent, have avoided addressing the issue for fear of becoming targets. (...) One area of intense debate is the use of primates in stroke research. Despite the fact that stroke kills more people each year than AIDS and malaria, and less than 5% of patients are candidates for current therapies, there is significant opposition to primate stroke research. A balanced examination of the ethics of primate stroke research is thus of broad interest to all areas of biomedical research. (shrink)