Humans regularly pursue activities characterized by dramatic success or failure outcomes where, critically, the chances of success depend on the time invested working toward it. How should people allocate time between such make‐or‐break challenges and safe alternatives, where rewards are more predictable (e.g., linear) functions of performance? We present a formal framework for studying time allocation between these two types of activities, and we explore optimal behavior in both one‐shot and dynamic versions of the problem. In the one‐shot version, we (...) illustrate striking discontinuities in the optimal time allocation policy as we gradually change the parameters of the decision‐making problem. In the dynamic version, we formulate the optimal strategy—defined by a giving‐up threshold—which adaptively dictates when people should stop pursuing the make‐or‐break goal. We then show that this strategy is computationally inaccessible for humans, and we explore boundedly rational alternatives. We compare the performance of the optimal model against (a) a myopic giving‐up threshold that is easier to compute, and even simpler heuristic strategies that either (b) only decide whether or not to start pursuing the goal and never give up or (c) consider giving up at a fixed number of control points. Comparing strategies across environments, we investigate the cost and behavioral implications of sidestepping the computational burden of full rationality. (shrink)

Obtaining ‘informed consent’ from every individual participant involved in health research is a mandatory ethical practice. Informed consent is a process whereby potential participants are genuinely informed about their role, risk and rights before they are enrolled in the study. Thus, ethics committees in most countries require ‘informed consent form’ as part of an ethics application which is reviewed before granting research ethics approval. Despite a significant increase in health research activity in low-and middle-income countries in recent years, only limited (...) work has been done to address ethical concerns. Most ethics committees in LMICs lack the authority and/or the capacity to monitor research in the field. This is important since not all research, particularly in LMICs region, complies with ethical principles, sometimes this is inadvertently or due to a lack of awareness of their importance in assuring proper research governance. With several examples from Nepal, this paper reflects on the steps required to obtain informed consents and highlights some of the major challenges and barriers to seeking informed consent from research participants. At the end of this paper, we also offer some recommendations around how can we can promote and implement optimal informed consent taking process. We believe that paper is useful for researchers and members of ethical review boards in highlighting key issues around informed consent. (shrink)

We prove the following instance of a conjecture stated in [P. E. Eleftheriou and Y. Peterzil, Definable quotients of locally definable groups, Selecta Math. 18 885–903]. Let [Formula: see text] be an abelian semialgebraic group over a real closed field [Formula: see text] and let [Formula: see text] be a semialgebraic subset of [Formula: see text]. Then the group generated by [Formula: see text] contains a generic set and, if connected, it is divisible. More generally, the same result holds when (...) [Formula: see text] is definable in any o-minimal expansion of [Formula: see text] which is elementarily equivalent to [Formula: see text]. We observe that the above statement is equivalent to saying: there exists an [Formula: see text] such that [Formula: see text] is an approximate subgroup of [Formula: see text]. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy of Music Education Review 12.1 (2004) 80-83 [Access article in PDF] Response to Yiannis Miralis, "Manos Hadjidakis: The Story of an Anarchic Youth and a 'Magnus Eroticus'" Lenia Serghi Ionian University, Corfu Manos Hadjidakis and his work are like his song, "O Mythos," for they take you from reality to fantasy and bring you back again. For my generation Hadjidakis was a myth with substance, since he was (...) a real person and his work represented our reality.The first time I heard of Hadjidakis was in relation to his song, "The Children of Pireas," that won him an Oscar for Best Song in 1960-61 as the main theme of his music for the film, Never on Sunday. The first record, a 45-single in the early 1960s, aroused a strong emotional response in the youth of the time.My next and most important experience with Hadjidakis' music was in London during the International Theatre Festival in the Spring of 1964. The Art Theatre of Greece under the Direction of the acclaimed Karolos Koun gave its first performances outside Greece. They presented Aristophanes' comedy, The Birds, and the Aeschylean tragedy, The Persaes. After forty years these performances are still topics of discussion in theater and musical circles. The performance of The Birds took the audience by surprise. The strong, vivid rhythm with the superb [End Page 80] melodies and the chorus filling the stage with its movements and dance gave a new perspective to the production of ancient comedy and drama. The audience was exuberant and the clapping went on without end. It was the unveiling of a new world of music for the theater, a music which could create strong emotions.Perhaps one of the most important works of Hadjidakis is the cycle of songs, The Megalos Eroticos-Magnus Eroticus, composed in 1972 for two voices, choir, and twelve instruments. The song cycle consists of eleven songs based on the lyrics of Greek poets from antiquity till the present time, like Sappho, Euripides, Solomos, Sepheris, Gatsos, Elytis, and Kavafis. Included in the collection is the famous poem, "S'agapo" [I love you], by Myrtiotissa, one of the important women poets of the twentieth century, which according to Hadjidakis was his inspiration for writing Magnus Eroticus. As he says: I think I succeeded [in creating] a beautiful piece of work, and deeply, it belongs to her as a whole. If Magnus Eroticus belongs to somebody it belongs to the memory of Myrtiotissa.1In Magnus Eroticus the combination of lyrics and music is at the highest level of sensibility and the musical style of each song is superb. Music follows the verse to express its deepest meaning while maintaining its uniqueness. In 1973, Pantelis Voulgaris made Magnus Eroticus into a film of the same title.Without doubt Hadjidakis was one of the troubadours of love; in fact he considered himself as a tragoudopoios. Etymologically tragoudopoios comes from the words tragoudi (song) and the verb poio (make, create), and is the root of the word poieses (poetry). A tragoudopoios could be a follower of the rhapsodoi of Homer's time, or the troubadours of medieval times who created songs.In my view, the comparison made by some critics of Hadjidakis' songs with those of Schubert and Brahms is not so successful, especially for the songs written in the 50s, 60s, and 70s, songs that were very popular and represented the reality of Greek life of that period. Similarities to these composers may exist in his later work of the 80s, when his style of art song had become more sophisticated.As a person and composer, Hadjidakis himself could be considered a Magnus Eroticus. I am not sure, though, that he could be considered an anarchist, as Miralis suggests. As Hadjidakis used to say, "[P]erhaps I would have been an anarchist if I didn't have my mother." I would say he was more a lover of democracy in its wider sense.One could say, perhaps, that Hadjidakis was an anarchist in spirit... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy of Music Education Review 12.1 (2004) 80-83 [Access article in PDF] Response to Yiannis Miralis, "Manos Hadjidakis: The Story of an Anarchic Youth and a 'Magnus Eroticus'" Lenia Serghi Ionian University, Corfu Manos Hadjidakis and his work are like his song, "O Mythos," for they take you from reality to fantasy and bring you back again. For my generation Hadjidakis was a myth with substance, since he was (...) a real person and his work represented our reality.The first time I heard of Hadjidakis was in relation to his song, "The Children of Pireas," that won him an Oscar for Best Song in 1960-61 as the main theme of his music for the film, Never on Sunday. The first record, a 45-single in the early 1960s, aroused a strong emotional response in the youth of the time.My next and most important experience with Hadjidakis' music was in London during the International Theatre Festival in the Spring of 1964. The Art Theatre of Greece under the Direction of the acclaimed Karolos Koun gave its first performances outside Greece. They presented Aristophanes' comedy, The Birds, and the Aeschylean tragedy, The Persaes. After forty years these performances are still topics of discussion in theater and musical circles. The performance of The Birds took the audience by surprise. The strong, vivid rhythm with the superb [End Page 80] melodies and the chorus filling the stage with its movements and dance gave a new perspective to the production of ancient comedy and drama. The audience was exuberant and the clapping went on without end. It was the unveiling of a new world of music for the theater, a music which could create strong emotions.Perhaps one of the most important works of Hadjidakis is the cycle of songs, The Megalos Eroticos-Magnus Eroticus, composed in 1972 for two voices, choir, and twelve instruments. The song cycle consists of eleven songs based on the lyrics of Greek poets from antiquity till the present time, like Sappho, Euripides, Solomos, Sepheris, Gatsos, Elytis, and Kavafis. Included in the collection is the famous poem, "S'agapo" [I love you], by Myrtiotissa, one of the important women poets of the twentieth century, which according to Hadjidakis was his inspiration for writing Magnus Eroticus. As he says: I think I succeeded [in creating] a beautiful piece of work, and deeply, it belongs to her as a whole. If Magnus Eroticus belongs to somebody it belongs to the memory of Myrtiotissa.1In Magnus Eroticus the combination of lyrics and music is at the highest level of sensibility and the musical style of each song is superb. Music follows the verse to express its deepest meaning while maintaining its uniqueness. In 1973, Pantelis Voulgaris made Magnus Eroticus into a film of the same title.Without doubt Hadjidakis was one of the troubadours of love; in fact he considered himself as a tragoudopoios. Etymologically tragoudopoios comes from the words tragoudi (song) and the verb poio (make, create), and is the root of the word poieses (poetry). A tragoudopoios could be a follower of the rhapsodoi of Homer's time, or the troubadours of medieval times who created songs.In my view, the comparison made by some critics of Hadjidakis' songs with those of Schubert and Brahms is not so successful, especially for the songs written in the 50s, 60s, and 70s, songs that were very popular and represented the reality of Greek life of that period. Similarities to these composers may exist in his later work of the 80s, when his style of art song had become more sophisticated.As a person and composer, Hadjidakis himself could be considered a Magnus Eroticus. I am not sure, though, that he could be considered an anarchist, as Miralis suggests. As Hadjidakis used to say, "[P]erhaps I would have been an anarchist if I didn't have my mother." I would say he was more a lover of democracy in its wider sense.One could say, perhaps, that Hadjidakis was an anarchist in spirit... (shrink)

There are basic traffic rules as well as rules that must be followed personally and socially. Depending on the drivers, positive and negative behaviors occur in traffic. Because of negative behaviors in traffic, there are loss of life and property, as well as moral/psychological prob-lems. It is seen that moral behavior, empathy and religious values are important in traffic. There are many studies that reveal the relationship between religiousness, traffic behaviors, and empathy. It can be predicted that there are relationships (...) between religiosity, driver behav-ior and empathy. Moreover, according to studies based on correlation relations, it can be stated that those with high religiousness, inner religiosity and empathy scores are more careful and respectful in traffic. Empathic tendencies and religious values might lead to be more civilized, more respectful, and to comply with the traffic rules. The aim of the current study was to analyze the relationship between religiosity, traffic behavior, and empathy. Under the guidance of literature, the following hypotheses were tested: There is a differentiation in traffic errors and violations and positive driver behavior by gender. Positive driver behaviors and traffic errors and violations differ according to the accident rate. There is a statistically positive rela-tionship between religiousness and empathy and positive driver behavior. There is a negative relationship between religiousness and traffic errors and violations. Religiousness predicts empathetic tendencies and positive driver behavior. Empathy mediates in the relationship between religiosity and positive driver behavior. Research methods of the current study were documentation and relational survey method. Data collection was made by means of various social media and messengers etc. A total of 201 volunteers participated in the current study. According to gender, 104 (51.7%) of the partici-pants were men and 97 (48.3%) were women. The age range of the sample varied between 20 and 58 and the average age is 33. 199 (99%) of the participants had a driver’s license, 2 (1%) had not any driver’s license. In terms of accident rates, 100 of the participants (49.8%) had an accident, 101 of them (50.2%) never had an accident. The data was analyzed using SPSS and AMOS program. Descriptive analysis, t-test, Pearson correlation test, multiple regression based on structural equation model, intermediate variable analysis, and reliability analysis tests were performed in the analyzes. The questionnaire of the study consisted of the personal infor-mation form and the consent form created by the researcher, the driver behavior scale devel-oped by Reason et al., adapted to Turkish by Sümer et al., the positive driver behavior scale developed by Özkan and Lajunen, the empathic tendency scale developed by Dökmen and the religiousness scale developed by Ayten. According to gender, there is a statistically significant differentiation in terms of traffic errors and violations (t (199) = 4.731; p 0.001), and errors and violations (β = -, 120; p> 0.001). Regarding the regression weights according to the structural equation model, in terms of relationships between varia-bles, it is not statistically eligible to analyze the mediator. (shrink)

We show how in the hierarchies${F_\alpha }$of Fieldian truth sets, and Herzberger’s${H_\alpha }$revision sequence starting from any hypothesis for${F_0}$ that essentially each${H_\alpha }$ carries within it a history of the whole prior revision process.As applications we provide a precise representation for, and a calculation of the length of, possiblepath independent determinateness hierarchiesof Field’s construction with a binary conditional operator. We demonstrate the existence of generalized liar sentences, that can be considered as diagonalizing past the determinateness hierarchies definable in Field’s recent (...) models. The ‘defectiveness’ of such diagonal sentences necessarily cannot be classified by any of the determinateness predicates of the model. They are ‘ineffable liars’. We may consider them a response to the claim of Field that ‘the conditional can be used to show that the theory is not subject to “revenge problems”.’. (shrink)

We develop and apply a multi-dimensional conception of explanatory depth towards a comparative analysis of inflationary and bouncing paradigms in primordial cosmology. Our analysis builds on earlier work due to Azhar and Loeb (2021) that establishes initial condition fine-tuning as a dimension of explanatory depth relevant to debates in contemporary cosmology. We propose dynamical fine-tuning and autonomy as two further dimensions of depth in the context of problems with instability and trans-Planckian modes that afflict bouncing and inflationary approaches respectively. In (...) the context of the latter issue, we argue that the recently formulated trans-Planckian censorship conjecture leads to a trade-off for inflationary models between dynamical fine-tuning and autonomy. We conclude with the suggestion that explanatory preference with regard to the different dimensions of depth is best understood in terms of differing attitudes towards heuristics for future model building. (shrink)

We represent truth sets for a variety of the well known semantic theories of truth as those sets consisting of all sentences for which a player has a winning strategy in an infinite two person game. The classifications of the games considered here are simple, those over the natural model of arithmetic being all within the arithmetical class of $\Sum_{3}^{0}$.

We consider various concepts associated with the revision theory of truth of Gupta and Belnap. We categorize the notions definable using their theory of circular definitions as those notions universally definable over the next stable set. We give a simplified account of varied revision sequences-as a generalised algorithmic theory of truth. This enables something of a unification with the Kripkean theory of truth using supervaluation schemes.

When I offered this title, I was engaging myself to investigate an apparent difference between two kinds of intentionality, in the hope that I should be able to find some firm logical criterion to distinguish them. I was less successful in this than I had hoped. I think I have gained a certain amount of insight into the logic and semantics of one kind of intentional context, largely due to the work I was doing while visiting the University of Pennsylvania (...) on Frege and on Michael Dummett’s monumental commentary on Frege. But as regards the other variety of intentionality I am still very much in the dark; so I am giving you thus far merely a progress report on that. (shrink)

We look at various notions of a class of definability operations that generalise inductive operations, and are characterised as “revision operations”. More particularly we: (i) characterise the revision theoretically definable subsets of a countable acceptable structure; (ii) show that the categorical truth set of Belnap and Gupta’s theory of truth over arithmetic using \emph{fully varied revision} sequences yields a complete \Pi13 set of integers; (iii) the set of \emph{stably categorical} sentences using their revision operator ψ is similarly \Pi13 and which (...) is complete in Gödel’s universe of constructible sets L; (iv) give an alternative account of a theory of truth—realistic variance that simplifies full variance, whilst at the same time arriving at Kripkean fixed points. (shrink)

We analyse the extent of possible computations following Hogarth ([2004]) conducted in Malament–Hogarth (MH) spacetimes, and Etesi and Németi ([2002]) in the special subclass containing rotating Kerr black holes. Hogarth ([1994]) had shown that any arithmetic statement could be resolved in a suitable MH spacetime. Etesi and Németi ([2002]) had shown that some relations on natural numbers that are neither universal nor co-universal, can be decided in Kerr spacetimes, and had asked specifically as to the extent of computational limits there. (...) The purpose of this note is to address this question, and further show that MH spacetimes can compute far beyond the arithmetic: effectively Borel statements (so hyperarithmetic in second-order number theory, or the structure of analysis) can likewise be resolved: Theorem A. If H is any hyperarithmetic predicate on integers, then there is an MH spacetime in which any query ? n H ? can be computed. In one sense this is best possible, as there is an upper bound to computational ability in any spacetime, which is thus a universal constant of that spacetime. Theorem C. Assuming the (modest and standard) requirement that spacetime manifolds be paracompact and Hausdorff, for any spacetime there will be a countable ordinal upper bound, , on the complexity of questions in the Borel hierarchy computable in it. Introduction 1.1 History and preliminaries Hyperarithmetic Computations in MH Spacetimes 2.1 Generalising SADn regions 2.2 The complexity of questions decidable in Kerr spacetimes An Upper Bound on Computational Complexity for Each Spacetime CiteULike Connotea Del.icio.us What's this? (shrink)

We show that Leitgeb’s dependence operator of Leitgeb is a \-operator and that this is best possible.

D. Z. Phillips is a leading figure in advocating a Wittgensteinian approach to the philosophical study of religion. His writings exert an important influence on contemporary philosophy of religion, giving a new direction to the philosophical discussion of religious belief and practice. Although his work has prompted much - often critical - comment, a thorough investigation has not been forthcoming. Grammars of Faith fills that gap. The book pays close attention to Wittgenstein's own remarks on religious belief, arranging them against (...) the background of his broader philosophical methodology, as well as to the efforts of the early Wittgensteinians at providing a more comprehensive Wittgensteinian philosophy of religion. Central to this study are Phillips's understanding of philosophical enquiry as a form of contemplation, and his descriptive accounts of religious belief. By means of a careful and methodical examination of Phillips's oeuvre, the study seeks to present a fair assessment of Phillips's position, showing not only its weaknesses, but also its strength. (shrink)

P S Wilson; Child-Centred Education, Journal of Philosophy of Education, Volume 3, Issue 1, 30 May 2006, Pages 105–126, https://doi.org/10.1111/j.1467-9752.1969.

In this essay, P. Taylor Webb and Kalervo N. Gulson argue that educational policy is a spatial process and that implementation processes in particular produce crucial emergent geographies for policy research. Webb and Gulson describe how emergent geographies are produced when policy folds actors through senses and enactments of policy. The idea that policy is sensed and enacted is developed into the concept of a policy intension that extends approaches to spatial and, in particular, micropolitical analyses in policy research. Webb (...) and Gulson conclude by discussing cartographical methods that better map the geographies of subjectivity produced through policy intensions. (shrink)

We consider notions of truth and logical validity defined in various recent constructions of Hartry Field. We try to explicate his notion of determinate truth by clarifying the path-dependent hierarchies of his determinateness operator.

P S Wilson; Perspectives on Punishment—Reply to Pamela Moore, Journal of Philosophy of Education, Volume 8, Issue 1, 30 May 2006, Pages 103–134, https://doi.org.

In this desolate ancient country, which is a semicolony, all activities [seemed to have] stopped. People's lives have also become meaningless. The warm breeze blown from other countries stirred the curiosity of youth. Go! Let us go to the free world. And so, many people left the motherland for France in Europe, as if even workers there were happier than gentlemen here. But what was the reality? They were unable to do very hard work like the average workers. So their (...) idealized country became the target of their curses. (shrink)