We present a one per cent measurement of the cosmic distance scale from the detections of the baryon acoustic oscillations in the clustering of galaxies from the Baryon Oscillation Spectroscopic Survey, which is part of the Sloan Digital Sky Survey III. Our results come from the Data Release 11 sample, containing nearly one million galaxies and covering approximately 8500 square degrees and the redshift range 0.2 < z < 0.7. We also compare these results with those from the publicly released (...) DR9 and DR10 samples. Assuming a concordance Λ cold dark matter cosmological model, the DR11 sample covers a volume of 13 Gpc3 and is the largest region of the Universe ever surveyed at this density. We measure the correlation function and power spectrum, including density-field reconstruction of the BAO feature. The acoustic features are detected at a significance of over 7σ in both the correlation function and power spectrum. Fitting for the position of the acoustic features measures the distance relative to the sound horizon at the drag epoch, rd, which has a value of rd,fid = 149.28 Mpc in our fiducial cosmology. We find DV = at z = 0.32 and DV = at z = 0.57. At 1.0 per cent, this latter measure is the most precise distance constraint ever obtained from a galaxy survey. Separating the clustering along and transverse to the line of sight yields measurements at z = 0.57 of DA = and H =. Our measurements of the distance scale are in good agreement with previous BAO measurements and with the predictions from cosmic microwave background data for a spatially flat CDM model with a cosmological constant. © 2014 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. (shrink)

We consider the problem of measurement using the Lindblad equation, which allows the introduction of time in the interaction between the measured system and the measurement apparatus. We use analytic results, valid for weak system-environment coupling, obtained for a two-level system in contact with a measurer (Markovian interaction) and a thermal bath (non-Markovian interaction), where the measured observable may or may not commute with the system-environment interaction. Analysing the behavior of the coherence, which tends to a value asymptotically close to (...) zero, we obtain an expression for the time of measurement which depends only on the system-measurer coupling, and which does not depend on whether the observable commutes with the system-bath interaction. The behavior of the coherences in the case of strong system-environment coupling, found numerically, indicates that an increase in this coupling decreases the measurement time, thus allowing our expression to be considered the upper limit for the duration of the process. (shrink)

Preoccupation with language is a notable feature of modern philosophy. Indeed, it is not too much to say that the influence of language on thought, and particularly its influence on philosophical thought, is a leading topic of philosophical discussion in this century. Every philosopher of any note, no matter what his general interests may be, has found it necessary to define his attitude to this problem. The attitude usually adopted consists of an admission that language does have a great influence (...) on thought, and on philosophical thought in particular. More accurately, it is claimed that the structure and grammatical categories, and perhaps the vocabulary, natural to a particular language, determine the lines of thought and speculation open to any thinker who uses that language .This determination is unimportant in many cases, because the results of our thinking are usually subject to check by appeal to empirical facts. In philosophical thinking, however, no such check is available by the very nature of the case. Accordingly, we cannot tell if the difficulty or apparent insolubility of a philosophical problem is due to the problem itself, or simply due to inadequacies in our language. In a different language, so it is suggested, the problem which is difficult for us might very easily be solved. Indeed, there might not then be any such problem, or its solution might be self-evident in this other language. This is the moderate attitude to the language difficulty in philosophy, and it is fair to say that it is almost universally adopted at the present day. In some circles it has acquired the prestige of an indisputable dogma. (shrink)

Coastal ecosystems are increasingly dominated by humans. Consequently, the human dimensions of sustainability science have become an integral part of emerging coastal governance and management practices. But if we are to avoid the harsh lessons of land management, coastal decision makers must recognize that humans are one of the more coastally dependent species in the biosphere. Management responses must therefore confront both the temporal urgency and the very real compromises and sacrifices that will be necessary to achieve a sustainable coastal (...) ecosystem, one that is economically feasible, socially just, and ecologically sound. (shrink)

Molecular cloning of the genes encoding the muscarinic acetylcholine receptors has shwon that receptor subtypes classified on the basis of pharmacological properties are related polypeptides encoded by distinct genes. These studies have laso revealed the existence of novel muscarinic receptor subtypes. Functional analysis of each of the subtypes expressed in mammalian cells indicates that the different subtypes activate distinct biochemical pathways, a finding that explains the tissue‐specific physiological response elicited by the neurotransmitter, acetylcholine.

The effects in a quantum-mechanical system form a partial algebra and a partially ordered set which is the prototypical example of the effect algebras discussed in this paper. The relationships among effect algebras and such structures as orthoalgebras and orthomodular posets are investigated, as are morphisms and group- valued measures (or charges) on effect algebras. It is proved that there is a universal group for every effect algebra, as well as a universal vector space over an arbitrary field.

Do the most celebrated works of Rousseau—more particularly his Discourse on Inequality, émile , and Control Social —present on the whole a coherent answer to the problems of Education and Society? My impression is that Rousseau has here been very much calumniated, owing to the incredible haste and superficiality with which his writings have generally been studied. Even sympathetic inquirers, like M. Schinz in his thorough and attractive work La Pensée de J. J. Rousseau , seem to be too easily (...) discouraged in the quest for unity. (shrink)

An appropriate kind of curved Hilbert space is developed in such a manner that it admits operators of $\mathcal{C}$ - and $\mathfrak{D}$ -differentiation, which are the analogues of the familiar covariant and D-differentiation available in a manifold. These tools are then employed to shed light on the space-time structure of Quantum Mechanics, from the points of view of the Feynman ‘path integral’ and of canonical quantisation. (The latter contains, as a special case, quantisation in arbitrary curvilinear coordinates when space is (...) flat.) The influence of curvature is emphasised throughout, with an illustration provided by the Aharonov-Bohm effect. (shrink)

This new translation of _De Caelo_ fits seamlessly with other volumes in the New Hackett Aristotle series, enabling Anglophone readers to study Aristotle’s work in a way previously not possible. The Introduction describes the book that lies ahead, explaining what it is about, what it is trying to do, how it goes about doing it, and what sort of audience it presupposes. Sequentially numbered endnotes provide the information most needed at each juncture, while a detailed Index indicates the places where (...) focused discussion of key notions occurs. (shrink)

Multiple -conclusion logic extends formal logic by allowing arguments to have a set of conclusions instead of a single one, the truth lying somewhere among the conclusions if all the premises are true. The extension opens up interesting possibilities based on the symmetry between premises and conclusions, and can also be used to throw fresh light on the conventional logic and its limitations. This is a sustained study of the subject and is certain to stimulate further research. Part I reworks (...) the fundamental ideas of logic to take account of multiple conclusions, and investigates the connections between multiple - and single - conclusion calculi. Part II draws on graph theory to discuss the form and validity of arguments independently of particular logical systems. Part III contrasts the multiple - and the single - conclusion treatment of one and the same subject, using many-valued logic as the example; and Part IV shows how the methods of 'natural deduction' can be matched by direct proofs using multiple conclusions. (shrink)

" Waldie speculates on the meanings and implications of the snapshots in this book and of snapshots generally, which he sees as expressions of "the hunger of memory.".

Thetext of the de Caelo was the subject of an interesting article in the Rivista Storia Antica, N.S. IX, by Dr. R. Rubrichi; he showed that where the manuscriptsdiverge, we ought to bring in the evidence of Simplicius, and that when we look closely into the sense, the commentator's reading is in most cases decidedly preferable; he also established a fact which is familiar from editions of the othér physical treatises, namely that there is some specially close affinity between the (...) text of E and that used by Simplicius. (shrink)

On creating a grammar for living together The article is about the question whether it is possible for South Africans to learn a new common moral language. Six well-known positions are considered: a common political language, a common economic language, a common Biblical language, a common Christian language, a common language of survival, and a common rational language.