If the density matrix is treated as an objective description of individual systems, it may become possible to attribute the same objective significance to statistical mechanical properties, such as entropy or temperature, as to properties such as mass or energy. It is shown that the de Broglie--Bohm interpretation of quantum theory can be consistently applied to density matrices as a description of individual systems. The resultant trajectories are examined for the case of the delayed choice interferometer, for which Bell [Int. (...) J. Quantum chem. 155--159, (1980)] appears to suggest that such an interpretation is not possible. Bell’s argument is shown to be based upon a different understanding of the density matrix to that proposed here. (shrink)

Dynamical collapse models embody the idea of a physical collapse of the wave function in a mathematically well-defined way. They involve modifications to the standard rules of quantum theory in order to describe collapse as a physical process. This appears to introduce a time reversal asymmetry into the dynamics since the state at any given time depends on collapses in the past but not in the future. Here we challenge this conclusion by demonstrating that, subject to specified model constraints, collapse (...) models can be given a structurally time symmetric formulation in which the collapse events are the primitive objects of the theory. Three different examples of time asymmetries associated with collapse models are then examined and in each case it is shown that the same dynamical rule determining the collapse events works in both the forward and backward in time directions. Any physically observed time asymmetries that arise in such models are due to the asymmetric imposition of initial or final time boundary conditions, rather than from an inherent asymmetry in the dynamical law. This is the standard explanation of time asymmetric behaviour resulting from time symmetric laws. (shrink)

Schulman (Entropy 7(4):221–233, 2005) has argued that Boltzmann’s intuition, that the psychological arrow of time is necessarily aligned with the thermodynamic arrow, is correct. Schulman gives an explicit physical mechanism for this connection, based on the brain being representable as a computer, together with certain thermodynamic properties of computational processes. Hawking (Physical Origins of Time Asymmetry, Cambridge University Press, Cambridge, 1994) presents similar, if briefer, arguments. The purpose of this paper is to critically examine the support for the link between (...) thermodynamics and an arrow of time for computers. The principal arguments put forward by Schulman and Hawking will be shown to fail. It will be shown that any computational process that can take place in an entropy increasing universe, can equally take place in an entropy decreasing universe. This conclusion does not automatically imply a psychological arrow can run counter to the thermodynamic arrow. Some alternative possible explanations for the alignment of the two arrows will be briefly discussed. (shrink)

The “A-not-B” error is consistent with an old memory principle, Jost's Law. Quantitative properties of the effect can be explained by a dynamic model for habituation that is also consistent with Jost. Piaget was well aware of the resemblance between adult memory errors and the “A-not-B” effect and, contrary to their assertions, Thelen et al.'s analysis of the object concept is much the same as his, though couched in different language.

The celebrated Dreimännerarbeit by Born, Heisenberg and Jordan contains a matrix-mechanical derivation by Jordan of Planck’s formula for blackbody fluctuations. Jordan appears to have considered this to be one of his finest contributions to quantum theory, but the status of his derivation is puzzling. In our Dreimenschenarbeit, we show how to understand what Jordan was doing in the double context of a Boltzmannian approach to statistical mechanics and of the early ‘statistical interpretation’ of matrix mechanics.

In May 2011, the clinical ethics group of the Center for Ethics at Washington Hospital Center launched a 40-hour, three and one-half day Clinical Ethics Immersion Course. Created to address gaps in training in the practice of clinical ethics, the course is for those who now practice clinical ethics and for those who teach bioethics but who do not, or who rarely, have the opportunity to be in a clinical setting. “Immersion” refers to a high-intensity clinical ethics experience in a (...) busy, urban, acute care hospital. During the Immersion Course, participants join clinical ethicists on working rounds in intensive care units and trauma service. Participants engage in a videotaped role-play conversation with an actor. Each simulated session reflects a practical, realistic clinical ethics case consultation scenario. Participants also review patients’ charts, and have small group discussions on selected clinical ethics topics. As ethics consultation requests come into the center, Immersion Course participants accompany clinical ethicists on consultations. Specific to this pilot, because participants’ evaluations and course faculty impressions were positive, the Center for Ethics will conduct the course twice each year. We look forward to improving the pilot and establishing the Immersion Course as one step towards addressing the gap in training opportunities in clinical ethics. (shrink)

OBJECTIVE: We studied and compared the attitudes of pregnant women v new mothers in an attempt to confirm changing patterns of maternal response towards medical ethical decision making in critically ill or malformed neonates. DESIGN: Data were obtained by questionnaires divided into three sections: 1. sociodemographic; 2. Theoretical principles which might be utilised in the decision-making process; 3. Hypothetical case scenarios, each followed by possible treatment options. RESULTS: Pregnant women (n = 545) consistently requested less aggressive medical intervention for the (...) hypothetical cases than did new mothers (n = 250) [Trisomy 18: 57% v 42%; p = 0.0004; Asphyxia: 75% v 63%; p = 0.0017; Down's syndrome 81% v 62%; p = 0.0001; LBW 85% v 75%; p = 0.004]. Significant differences were also observed in the responses to the theoretical principles, with pregnant women attributing less importance to preserving life at all cost, while being more concerned with physical and emotional pain and suffering, with financial cost, and with the infant's potential for future productivity. (shrink)

Abstract‘Yellow Rain’, an alleged biological warfare agent thought to be utilized in parts of both South East Asia and Afghanistan, may be composed in part of the mycotoxins, trichothecenes. However, more recent analyses suggest that the ‘Rain’ was mainly honey bee excreta. The history of the controversy together with the biological effects, chemistry as well as the fungi producing these mycotoxins and agricultural commodities affected by trichothecenes are reviewed.

Recent studies have shown the importance of integrating multisensory information in the body representation for constituting self-consciousness. However, one idea that has received only scant attention is that our body representation is also constituted by knowledge of bodily visual characteristics . Here in two experiments we used a full body crossmodal congruency task in which visual distractors were presented on a photograph of the participant, another person, who was either familiar or unfamiliar, or an object. Results revealed that during the (...) ‘self-condition’ CCEs were enhanced compared to the ‘other condition’. The CCE was similar for unfamiliar and familiar others. CCEs for the object condition were significantly smaller. The results show that presentation of an irrelevant image of a body affects multimodal processing and that the effect is enhanced when that image is of the self. The results hold intriguing implications for body representation in social situations. (shrink)

‘Saepe stilum vertas’, says Horace; and he had excellent company in his friend Virgil, who wrote the Aeneid at the rate of only about 900 lines a year, and spent hours in licking his verses into shape. It would have been instructive to sit at the elbow of these two poets, to see what they altered and what they rejected. It is clear, e.g., that there were certain caesural arrangements which Virgil deliberately affected and others which he as deliberately avoided. (...) But what of the care taken by these and other classical authors in arranging sounds in relation to mood or idea? This present incomplete essay is written frankly with scepticism in regard to dogmatic comments on certain particular points. It has been perilously easy to frame legislation on the basis of a predilection bolstered up by one or two instances. Even in the field of syntax we have seen generalizations on too narrow a foundation. An editor of Andocides enunciates ‘a very important principle of the language, which is rigidly observed by the best writers; viz., that, when a participle and a verb of different government are referred to the same object, the case of that object depends on the participle and not at all on the verb… Shilleto's remarks on this point must be excused, as evidently written hastily.’ But a casual cast of the net brings up about a score of violations of this principle from Homer to Menander. Where does the editor propose to draw the line between the respectable and the declassé Greek writers? Aristophanes, though cited in support, is actually flagrantly lawless in the matter; and with him must go not only Homer and Hyperides but Sophocles, Euripides, Menander, Xenophon, Lysias, and Plato, leaving among the élite, as cited by this editor, only Thucydides, Antiphon, and Aeschines; and one is entitled to doubt even their rigid observance of the law until they have actually been brought to court. In problems of rhythm, also, one has to be careful to use evidence as against preconception. When an editor hacks and fits the dactylics of Ennius so as to eradicate all feet beginning with two short syllables, it is as impious as recarving a statue by Daedalus because it does not conform to the canon of Polyclitus; and one may be forgiven if now and then one interprets the editor's corr. in his apparatus criticus not as correxi but as corrupi. (shrink)

Quantum state teleportation has focused attention on the role of quantum information. Here we examine quantum teleportation through the Bohm interpretation. This interpretation introduced the notion of active information and we show that it is this information that is exchanged during teleportation. We discuss the relation between our notion of active information and the notion of quantum information introduced by Schumacher.

We present an experimental test of the validity of the Pauli Exclusion Principle for electrons based on the concept put forward a few years ago by Ramberg and Snow. In this experiment we perform a very accurate search of X-rays from the Pauli-forbidden atomic transitions of electrons in the already filled 1S shells of copper atoms. Although the experiment has a simple structure, it poses deep conceptual and interpretational problems. Here we describe the experimental method and recent experimental results, which (...) we interpret as an upper limit for the probability to violate the Pauli Exclusion Principle. We present also future plans to upgrade the experimental apparatus using Silicon Drift Detectors. (shrink)

An enumeration of the emendations and interpretations of these verses would fill the space necessary for a whole article. Consequently, I shall proceed at once to a consideration of what I conceive to be the correct restoration of the passage. The last word of verse 601, νριθμος, is evidently genuine, and is accepted by all scholars. The preceding word, μλων, has been changed to μηνν. Jebb regards this as a certain correction, for ‘in no other way can νριθμος be justified.’ (...) That is true, if the adjective is to be taken with γ ; but, in my opinion, it agrees with χρνος. Cf. νριθμος χρνος , O.C. 617 μριος χρνος, Ai. 712 μγας χρνος. As we shall see, it is added as a reinforcement to παλαις to convey the notion that the months seemed numberless because they were so cheerless. Cf. O. T. 561 μακρ παλαιο τ' ༂ν μετρηθεεν χρνοι. (shrink)

Quite honestly, it is not easy to see what all the fuss is about. Sir Julian Huxley was clearly impressed. “A landmark in modern thought which we cannot afford to pass by” wrote John Stewart Collis in the Sunday Times, and the following week Arnold Toynbee in the Observer wrote: “This is a great book. If it is eclipsed by anything, it is by the spirit of the author, which shines through it”. The French reaction to the original text was (...) at least equally enthusiastic. André Rousseaux in Figaro Littéraire says: “Not since the 12th. Century has there been such a satisfying exposition of the perfect understanding between the material world and that of Christ Incarnate”. One wonders how much of the enthusiasm is due to the fact that Father Teilhard was not allowed to publish his philosophical thought in his own lifetime. The facts of his life are well known. Born in 1881, he joined the Jesuits in 1899 and was ordained. in 1912. Prehistory, geology, palaeontology, anthropology, were his chief intellectual interests, and he took his doctorate in the Sorbonne in 1922. He became professor of geology in the Institut Catholique in Paris and in 1923 went with Pére Licent S.J. to China on a palaeontological mission. The detail is given by Sir Julian in the introduction, in the course of which he pays Père Teilhard many felicitous tributes, notably that he was “a dedicated Christian priest.” On his return to France, Sir Julian tells us, “some of the ideas which he had expressed in his lectures about original sin and its relation to evolution, were regarded as unorthodox by his religious superiors, and he was forbidden to continue teaching.” He spent the next twenty years mostly in China with occasional scientific visits to India, Burma, Java, Abyssinia and the United States. The work under review was all but finished in Peking in 1938-1940. (shrink)

© 2016 Regents of the University of California.The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements from 721 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous (...) tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 117 reviews are many that are new or heavily revised, including those on Pentaquarks and Inflation. The complete Review is published online in a journal and on the website of the Particle Data Group. The printed PDG Book contains the Summary Tables and all review articles but no longer includes the detailed tables from the Particle Listings. A Booklet with the Summary Tables and abbreviated versions of some of the review articles is also available. (shrink)

This work is a study of Plato's ethical theory and in particular his paradoxical theses that virtue is knowledge and vice is ignorance and that no one voluntarily does evil. In the opening chapters O'Brien discusses Plato's debt to Homer and Hesiod and to the historians and tragedians. The succeeding chapters are devoted to an analysis of the ethical doctrines of over a dozen dialogues ranging from the Apology to the Laws. The principles of interpretation employed in the analysis are: (...) 1) each doctrine must be understood in relation to every other as well as to the whole, 2) we must give a literary analysis of the dialogues in addition to a textual and philosophical one, since Plato often prefers to suggest his view through his literary art rather than give them explicit statement, and 3) statements must be interpreted in context. From an application of these principles, Professor O'Brien concludes that Plato's ethical theory constitutes a unified set of doctrines. Elements which are often thought to be antithetic, i.e., the Socratic paradoxes and the partition of the soul, are seen to be complementary. The one affirms the rational unity of human nature and action and the other, the irrational multiplicity of both. In his words, they affirm "... virtue is knowledge, and it is more than knowledge." The book contains a long bibliography and an extensive index of topics discussed and texts cited. As a result, O'Brien's view on nearly every topic and text is readily accessible.—O. J. L. (shrink)

The Kiki-Bouba effect comprises a relation between two abstract figures and two non-words: the star-shaped figure is called 'Kiki' and the rounded figure 'Bouba'. The effect is explained by a sound-vision synaesthesia: certain sounds are associated with certain shapes in a non-arbitrary manner.When we asked the participants to decide which of the two figures, the star-shaped or the rounded one, to call yin and which yang, some 85% choose the star-shaped figure as yin. There are previous cases of synaesthesia where (...) personality is attributed to numbers or letters. In our results, the word Kiki is overall happy, clever, small, thin, young, unpleasant, and nervous. The starshaped figure is overall clever, tall, small, slim, nervous, unpleasant, and upper-class. That is, the correspondence above all concerns the qualifying adjectives clever, unpleasant, and nervous, as well as the physical appearance small and thin. This brings us to the fat-thin effect. Cinema, literature, comics, and children's programmes are full of contrasting figures: Don Quixote and Sancho Panza, Laurel and Hardy , Asterix and Obelix, Tintin and Captain Haddock, Bert and Ernie , or the Spanish comic about very naughty twin boys called Zipi and Zape . Our main conclusion is that first names and last names are not entirely arbitrary. There is a correspondence between names and physical characteristics and concepts . The Kiki-Bouba effect is a semantic one. (shrink)

The essays in this volume explore current work in central areas of philosophy, work unified by attention to salient questions of human action and human agency. They ask what it is for humans to act knowledgeably, to use language, to be friends, to act heroically, to be mortally fortunate, and to produce as well as to appreciate art. The volume is dedicated to J. O. Urmson, in recognition of his inspirational contributions to these areas. All the essays but one have (...) been specially written for this volume. (shrink)

Ensayos acerca de las preocupaciones del autor en dos sentidos: la demostraci n y el sometimiento a examen por medio de un di fano m todo intelectual al empe o marcado por una vocaci n de autenticidad: no seremos cabalmente quienes por raz n hist rica debemos ser mientras no asumamos las tareasdel pensamiento con una constructiva originalidad y con un permanente af n cr tico, serio y esclarecedor.

Locked-in syndrome (LIS) is one of the most dramatic neurological outcomes and has a profound impact on patients and their families. Most patients have intact cognition and intellectual ability and perception. Communication is possible with eyelid and/or eyeball movement. According to the literature, the wish to die is not an important issue in acute and chronic LIS. This study describes and analyses the ethical decision-making process in two opposite cases of LIS in the intensive care unit. One patient expressed the (...) wish to prolong her life for as long as possible; the other patient asked for deliberate termination of life. Both wishes were honoured. In conclusion, most patients with LIS are competent and intellectually intact. In The Netherlands the autonomy of the patient is respected by law. In respecting this autonomy, medical choices can be different in comparable patients. (shrink)