The main goal of the second issue of the Annual Review of the Sociology of Religion, devoted entirely to religion and politics, is precisely to question the sense of a reconstruction of the mutual and simultaneous relations between these two spheres of social life. What does this process mean and where is it taking us?

The Busy Beaver Competition is held by Turing machines. The better ones halt taking much time or leaving many marks, when starting from a blank tape. In order to understand the behavior of some Turing machines that were once record holders in the five-state Busy Beaver Competition, we analyze their halting problem on all inputs. We prove that the halting problem for these machines amounts to a well-known problem of number theory, that of the behavior of the repeated iteration of (...) Collatz-like functions, that is functions defined by cases according to congruence classes. (shrink)

The first-order logical theory Th $({\mathbb{N}},x + 1,F(x))$ is proved to be complete for the class ATIME-ALT $(2^{O(n)},O(n))$ when $F(x) = 2^{x}$ , and the same result holds for $F(x) = c^{x}, x^{c} (c \in {\mathbb{N}}, c \ge 2)$ , and F(x) = tower of x powers of two. The difficult part is the upper bound, which is obtained by using a bounded Ehrenfeucht–Fraïssé game.

Walter Zimmermann (né en 1949) est indéniablement une figure qui fascine et s'impose par sa démarche nomade dans le panorama des musiques d'aujourd'hui. Pianiste de formation, il fonda en 1977 le Beginner Studio à Cologne où furent données de nombreuses œuvres de musique expérimentale, telles celles de Morton Feldman. Parallèlement à son ancrage dans les musiques savantes et à ses préoccupations théoriques et philosophiques, il a montré un intérêt durable pour d'autres traditions culturelles, voire des expressions régionales. Ce premier ouvrage (...) français consacré à ce compositeur est issu d'un colloque international organisé à Strasbourg en 2018, dont l'objectif était de scruter les liens étroits entre mathématiques et musique, notamment par le biais de la philosophie, les questions d'écriture ou de composition, d'intonation, et les liens fondamentaux de ces musiques avec la poésie de diverses époques. (shrink)

Ist die Kunst wirklich so frei, wie heute ständig behauptet wird? 0Solange Künstler in kapitalistischen Verhältnissen vom Geldsack abhängig bleiben, solange sie sich selbst zum Clown machen müssen, um zu überleben, verkommt das Freiheitsgeschrei zur Kulisse.0PETER MICHELs Texte gehen solchen Fragen nach. Auch wenn sie sich mit Zurückliegendem beschäftigen, beziehen sie sich stets auf unsere Gegenwart. 0Sie untersuchen, wie sich das Verhältnis zur Kunst aus der DDR im zusammengeschobenen Deutschland langsam verändert. 0Sie wollen den Blick öffnen helfen für den Reichtum (...) jüdischer Kunst. Die komplizierten Bedingungen, unter denen in der DDR eine Kunstzeitschrift herausgegeben wurde, erinnern an Phasen des Kalten Krieges, an kulturpolitische Zusammenhänge und daran, wie ernst in diesen Jahren Kultur und Kunst genommen wurden. 0Hinter den Kulissen spielte sich auch vor 1989/90 manches ab, das aus der Sicht von heute neu und unaufgeregter bewertet werden muss. (shrink)

Patient safety has only recently been subjected to wide-spread systematic study. Healthcare differs from other high risk industries in being more diverse and multi-contextual, and less certain and regulated. Also many patient safety problems are low-frequency events associated with many, varied contributing factors. The subject of this paper is the epistemology of patient safety (the science of the method of finding out about patient safety). Patient safety research is considered here on the background of a risk management framework which requires (...) researchers to: • Understand the context - as a subset of healthcare quality, services and systems research, with technical and human behavioural (cultural) components and a range of external and internal organisational influences, a wide range of research disciplines is necessary • Identify the risks - identify the things that go wrong and the frequency and nature of different types of incidents from sources such as medical record review, observational studies, audit, incident and medico-legal reports • Analyse the risks - deconstruct the things that go wrong, identifying contributing factors and trying to detect trends and patterns in contributing factors, detection, mitigation factors, ameliorating factors and actions taken to reduce risk • Evaluate the risks - decide on priorities, identifying preventive and corrective strategies and judging the risk- and cost-benefit of potential corrective strategies such as standardisation or simplification of a process or device • Manage the risk - evaluate and scope preventive and/or corrective strategies and then implement these, or place the problem on a risk register pending solution, or accept that what is needed is unaffordable • Communicate and consult - use interactive sessions, audit, on-going feedback, reminders and patient mediated prompts • Monitor and review the state of the problem - get baseline trends and patterns so that changes can be tracked and properly attributed to an intervention A hierarchy of levels of evidence has been proposed for clinical research and we argue that insufficient weighting has been given to lower ranked levels of research and to qualitative research, although critical interpretive synthesis is now gaining acceptance in mainstream thinking (e.g. by the Cochrane Collaboration). Fundamental challenges remain including how to grasp the elusive concept of patient safety, how to quantify, characterise and cost the problems, how to judge the extent to which harm can be attributed to errors, violations or system failures, how to identify contributing factors and the extent to which they can be implicated, how to judge whether incidents or their precursors are preventable, how to generate strong evidence to make healthcare safer and how to translate research into practice. Future directions include addressing the mundane as well as rare, dramatic events, and developing further research in non-hospital settings and in developing countries. In summary, a mixture of qualitative and quantitative methods, using information from all available data sources and combining retrospective, real time and prospective study designs, is necessary to address some of the more difficult patient safety problems. (shrink)