In this paper, we study the power and limitations of computing effectively generic sequences using effectively random oracles. Previously, it was known that every 2-random sequence computes a 1-generic sequence and every 2-random sequence forms a minimal pair in the Turing degrees with every 2-generic sequence. We strengthen these results by showing that every Demuth random sequence computes a 1-generic sequence and that every Demuth random sequence forms a minimal pair with every pb-generic sequence. Moreover, we prove that for every (...) comeager${\cal G} \subseteq {2^\omega }$, there is some weakly 2-random sequenceXthat computes some$Y \in {\cal G}$, a result that allows us to provide a fairly complete classification as to how various notions of effective randomness interact in the Turing degrees with various notions of effective genericity. (shrink)

Cet article a pour but de présenter la première traduction française de deux textes de Helmholtz de 1878. À la lumière du développement des géométries non euclidiennes, il y critique la conception kantienne de l’espace. Par là même, il expose une redéfinition purement empiriste de la construction des déterminations spatiales qui, sous le nom de « géométrie physique », joua un rôle important chez Poincaré (qui la révise) et chez Einstein.

RÉSUMÉ: En 1938, Hans Reichenbach soutenait, dans Experience and Prediction, que la théorie de la signification défendue par le positivisme logique, à savoir le «verificationnisme strict», n’avait pas réussi à formuler un critère satisfaisant de la signification cognitive des énoncés. Il le remplaça par un critère purement probabiliste qui lui permettait de restaurer la connexion pragmatique entre le langage et l’action. Mais de sérieuses difficultés grèvent la justification de cette théorie. Le but de cet article est de se pencher sur (...) certaines de ces difficultés et de tenter d’y répondre d’une façon «quasi-reichenbachienne».ABSTRACT: Hans Reichenbach argued in Experience and Prediction (1938) that the theory of meaning defended by Logical Positivism, i.e., “strict verificationism,” failed to give a relevant criterion for cognitive meaningfulness. He replaces it with a wholly probabilistic criterion that allows us to establish a pragmatic connection between language and action. But serious difficulties arise in the justification of his theory. The aim of this article is to assess some of these difficulties and to indicate a way to solve them in a “reichenbachian” way. (shrink)

RÉSUMÉ: En 1938, Hans Reichenbach soutenait, dans Experience and Prediction, que la théorie de la signification défendue par le positivisme logique, à savoir le «verificationnisme strict», n’avait pas réussi à formuler un critère satisfaisant de la signification cognitive des énoncés. Il le remplaça par un critère purement probabiliste qui lui permettait de restaurer la connexion pragmatique entre le langage et l’action. Mais de sérieuses difficultés grèvent la justification de cette théorie. Le but de cet article est de se pencher sur (...) certaines de ces difficultés et de tenter d’y répondre d’une façon «quasi-reichenbachienne».ABSTRACT: Hans Reichenbach argued in Experience and Prediction (1938) that the theory of meaning defended by Logical Positivism, i.e., “strict verificationism,” failed to give a relevant criterion for cognitive meaningfulness. He replaces it with a wholly probabilistic criterion that allows us to establish a pragmatic connection between language and action. But serious difficulties arise in the justification of his theory. The aim of this article is to assess some of these difficulties and to indicate a way to solve them in a “reichenbachian” way. (shrink)

Review by: Johanna N. Y. Franklin The Bulletin of Symbolic Logic, Volume 19, Issue 1, Page 115-118, March 2013.

We consider effective versions of two classical theorems, the Lebesgue density theorem and the Denjoy–Young–Saks theorem. For the first, we show that a Martin-Löf random real z ∈ [0, 1] is Turing incomplete if and only if every effectively closed class.

We investigate the role of continuous reductions and continuous relativization in the context of higher randomness. We define a higher analogue of Turing reducibility and show that it interacts well with higher randomness, for example with respect to van Lambalgen’s theorem and the Miller–Yu/Levin theorem. We study lowness for continuous relativization of randomness, and show the equivalence of the higher analogues of the different characterizations of lowness for Martin-Löf randomness. We also characterize computing higher [Formula: see text]-trivial sets by higher (...) random sequences. We give a separation between higher notions of randomness, in particular between higher weak 2-randomness and [Formula: see text]-randomness. To do so we investigate classes of functions computable from Kleene’s [Formula: see text] based on strong forms of the higher limit lemma. (shrink)

EveryK-trivial set is computable from an incomplete Martin-Löf random set, i.e., a Martin-Löf random set that does not compute the halting problem.

A central object of study in the field of algorithmic randomness are notions of randomness for sequences, i.e., infinite sequences of zeros and ones. These notions are usually defined with respect to the uniform measure on the set of all sequences, but extend canonically to other computable probability measures. This way each notion of randomness induces an equivalence relation on the computable probability measures where two measures are equivalent if they have the same set of random sequences. In what follows, (...) we study the equivalence relations induced by Martin-Löf randomness, computable randomness, Schnorr randomness and Kurtz randomness, together with the relations of equivalence and consistency from probability theory. We show that all these relations coincide when restricted to the class of computable strongly positive generalized Bernoulli measures. For the case of arbitrary computable measures, we obtain a complete and somewhat surprising picture of the implications between these relations that hold in general. (shrink)

We show the existence of noncomputable oracles which are low for Demuth randomness, answering a question in [15]. We fully characterize lowness for Demuth randomness using an appropriate notion of traceability. Central to this characterization is a partial relativization of Demuth randomness, which may be more natural than the fully relativized version. We also show that an oracle is low for weak Demuth randomness if and only if it is computable.

A semimeasure is a generalization of a probability measure obtained by relaxing the additivity requirement to superadditivity. We introduce and study several randomness notions for left-c.e. semimeasures, a natural class of effectively approximable semimeasures induced by Turing functionals. Among the randomness notions we consider, the generalization of weak 2-randomness to left-c.e. semimeasures is the most compelling, as it best reflects Martin-Löf randomness with respect to a computable measure. Additionally, we analyze a question of Shen, a positive answer to which would (...) also have yielded a reasonable randomness notion for left-c.e. semimeasures. Unfortunately, though, we find a negative answer, except for some special cases. (shrink)

A set of infinite binary sequences ${\cal C} \subseteq 2$ℕ is negligible if there is no partial probabilistic algorithm that produces an element of this set with positive probability. The study of negligibility is of particular interest in the context of ${\rm{\Pi }}_1^0 $ classes. In this paper, we introduce the notion of depth for ${\rm{\Pi }}_1^0 $ classes, which is a stronger form of negligibility. Whereas a negligible ${\rm{\Pi }}_1^0 $ class ${\cal C}$ has the property that one cannot (...) probabilistically compute a member of ${\cal C}$ with positive probability, a deep ${\rm{\Pi }}_1^0 $ class ${\cal C}$ has the property that one cannot probabilistically compute an initial segment of a member of ${\cal C}$ with high probability. That is, the probability of computing a length n initial segment of a deep ${\rm{\Pi }}_1^0 $ class converges to 0 effectively in n.We prove a number of basic results about depth, negligibility, and a variant of negligibility that we call tt-negligibility. We provide a number of examples of deep ${\rm{\Pi }}_1^0 $ classes that occur naturally in computability theory and algorithmic randomness. We also study deep classes in the context of mass problems, examine the relationship between deep classes and certain lowness notions in algorithmic randomness, and establish a relationship between members of deep classes and the amount of mutual information with Chaitin’s Ω. (shrink)

The $\Omega $ numbers—the halting probabilities of universal prefix-free machines—are known to be exactly the Martin-Löf random left-c.e. reals. We show that one cannot uniformly produce, from a Martin-Löf random left-c.e. real $\alpha $, a universal prefix-free machine U whose halting probability is $\alpha $. We also answer a question of Barmpalias and Lewis-Pye by showing that given a left-c.e. real $\alpha $, one cannot uniformly produce a left-c.e. real $\beta $ such that $\alpha - \beta $ is neither left-c.e. (...) nor right-c.e. (shrink)

Since the mid-1980s, there has been a gradual ethical drift in the provision of maternal care in African health facilities in general, and in Cameroon in particular, despite government efforts. In fact, in Cameroon, an increasing number of caregivers are reportedly not providing compassionate care in maternity services. Consequently, many women, particularly the financially vulnerable, experience numerous difficulties in accessing these health services. In this article, we highlight the unequal access to care in public maternity services in Cameroon in general (...) and the Noun Division in particular. For this study, in addition to documentary review, two qualitative data collection techniques were used: direct observation and individual interviews. Following the field work, the observation data were categorized and analyzed to assess their relevance and significance in relation to the topics listed in the observation checklist. Interviews were recorded using a dictaphone; they were subsequently transcribed and the data categorized and coded. After this stage, an analysis grid was constructed for content analysis of the transcripts, to study the frequency of topics addressed during the interviews, as well as divergences and convergences among the respondents. The results of this data analysis showed that money has become the driving force in service provision. As such, it is the patient’s economic capital that counts. Considered “clients”, pregnant women without sufficient financial resources wait long hours in corridors; some die in pain under the indifferent gaze of the professionals who are supposed to take care of them. In sharp contrast, the findings revealed that financially privileged patients are able to bribe caregivers to attract their favour and obtain prompt, careful, and effective care. These ethical abuses observed in the Noun public health facilities drive women to use, from the beginning of their pregnancies to the delivery, only healthcare delivered by traditional health attendants. (shrink)

Crop genetic resources constitute a ‘new’ global commons, characterized by multiple layers of activities of farmers, genebanks, public and private research and development organizations, and regulatory agencies operating from local to global levels. This paper presents sui generis biocultural community protocols that were developed by four communities in Benin and Madagascar to improve their ability to contribute to, and benefit from, the crop commons. The communities were motivated in part by the fact that their national governments’ had recently ratified the (...) Plant Treaty and the Nagoya Protocol, which make commitments to promoting the rights of indigenous peoples, local communities and farmers, without being prescriptive as to how Contracting Parties should implement those commitments. The communities identified the protocols as useful means to advance their interests and/or rights under both the Plant Treaty and the Nagoya Protocol to be recognized as managers of local socio-ecological systems, to access genetic resources from outside the communities, and to control others’ access to resources managed by the community. (shrink)

This study aimed to identify the learning and business incubation processes and their impact on developing the performance of business incubators in Gaza Strip, and the study relied on the descriptive analytical approach, and the study population consisted of all employees working in business incubators in Gaza Strip in addition to experts and consultants in incubators where their total number reached (62) individuals, and the researchers used the questionnaire as a main tool to collect data through the comprehensive survey method, (...) where (55) questionnaires were retrieved with a recovery rate of (88.7%). The results of the study showed that there is a high approval of the variables of the study, where the dimension of incubation operations came with a relative weight (84.89%), followed by the learning dimension which got a relative weight (82.50%), while the performance level of the incubators got a relative weight (80.12%) and as the study results showed There is a positive relationship statistically between the two dimensions of learning and business incubation processes and performance development in business incubators, and the linear regression analysis model showed that the main effect in improving the performance of business incubators is "after business incubation operations" while it showed weak effect after learning. The study came out with several recommendations, the most important of which is that business incubators seek to reinforce the learning process and incubation processes for business, and the need to periodically evaluate their performance, and that a more effective mechanism be designed to follow up with companies after the end of the incubation period and monitor the progress of these companies. (shrink)

It is commonly assumed across the language sciences that some semantic participant information is lexically encoded in the representation of verbs and some is not. In this paper, we propose that semantic obligatoriness and verb class specificity are criteria which influence whether semantic information is lexically encoded. We present a comprehensive survey of the English verbal lexicon, a sentence continuation study, and an on-line sentence processing study which confirm that both factors play a role in the lexical encoding of participant (...) information. (shrink)

Esta reedición de La deshumanización del arte incluye, además del ensayo que da título al volumen, una serie de artículos que Ortega no recogió en ninguno de sus libros. En ellos se comprueba la persistencia con que supo extraer de la experienca del arte notas relevantes para el curso de sus formulaciones filosóficas. En esta nueva edición -revisada conforme a los originales- se incluye el discurso " La verdad no es sencilla ", publicado recientemente con carácter póstumo, y un apéndice, (...) inédito hasta la fecha, al ensayo " Sobre el punto de vista en las artes ". (shrink)

The logical empiricists often appear as a foil for feminist theories. Their emphasis on the individualistic nature of knowledge and on the value-neutrality of science seems directly opposed to most feminist concerns. However, several recent works have highlighted aspects of Carnap's views that make him seem like much less of a straightforwardly positivist thinker. Certain of these aspects lend themselves to feminist concerns much more than the stereotypical picture would imply.

In his groundbreaking work of 1969, Spinoza's Metaphysics: An Essay in Interpretation, Edwin Curley attacked the traditional understanding of the substance-mode relation in Spinoza, which makes modes inhere in the substance. Curley argued that such an interpretation generates insurmountable problems, as had been already claimed by Pierre Bayle in his famous entry on Spinoza. Instead of having the modes inhere in the substance Curley suggested that the modes’ dependence upon the substance should be interpreted in terms of (efficient) causation, i.e., (...) as committing Spinoza to nothing over and above the claim that the substance is the (efficient) cause of the modes. These bold and fascinating claims generated one of the most important scholarly controversies in Spinoza scholarship of the past thirty-five years. In this chapter I argue against Curley’s interpretation and attempt to reestablish the traditional understanding of Spinozistic modes as inhering in God and as predicated of God. I also criticize Curley’s philosophical motivation for suggesting this interpretation. I do believe, however, that Curley is right about the existence of an intimate connection between the substance-mode relation and causation in Spinoza. In the next chapter I will study the notion of ‘immanent cause’, which merges efficient causality and inherence. I will clarify the relation between immanent, efficient and material causation, and show where precisely Spinoza diverged from the traditional Aristotelian taxonomy of causes. In the second chapter I also discuss the German Idealists’ view of Spinoza as an ‘acosmist’. Under this interpretation Spinoza was a modern reviver of Eleatic monism, who allegedly asserts the mere existence of God, and denies the reality of the world of particular things. Spinozistic modes - according to this reading - are nothing but passing and unreal phenomena. Though this view of Spinoza as an ‘acosmist’ can be supported by some lines in Spinoza’s thought, I believe it should be rejected since it is not consistent with some of the most central doctrines of the Ethics. In the final part of the second chapter I discuss the relation between modes and the attributes under which they fall, and suggest a terminological distinction between a ‘mode of God’ (i.e., a mode under all attributes) and a ‘mode of an attribute’ (i.e., a mode under a specific attribute), a distinction which can help us avoid some common confusions in the treatment of the issue. (shrink)

The acknowledgement of basic human vulnerability in relationships between mental health service users and professionals working in community-based mental health services (in Norway) was a starting point. The purpose was to explore how users of these services describe and make sense of their meetings with other people. The research is collaborative, with researcher and person with experienced-based knowledge cooperating through the research process. Data is derived from 19 interviews with 11 people who depend on mental health services for assistance at (...) least three times a week. Data is analysed according to the Interpretative Phenomenological Analysis (IPA). Results confirm that reciprocity is fundamental for relationships, and that recognizing the individual entails personal involvement. The participants describe a struggle, and recognizing this struggle may help the professional to achieve a deeper understanding of the individual. (shrink)

The article examines the new discourse on medical professionalism and responsibility through the prism of conflicts among moral values, especially with regard to truth-telling. The discussion is anchored in the renaissance of English-language writing on medical ethics in the 18th century, which paralleled the rise of humanitarianism and the advent of the word “responsibility”. Following an analysis of the meanings of the value of responsibility in general and in medical practice in particular, it is argued that, similarly to the Aristotelian (...) notion of equity, responsibility of care is a second-order value, which corrects virtues, laws and norms in exceptional circumstances. Virtues and practices of the second order, such as responsibility and deliberation, bear especially on professional doctoring, which includes a commitment to give priority to the good of the patient over one’s own good. It is argued that, in situations of conflict, and particularly conflicts between personal moral identity and the good of patients, the fundamental professional commitment is to critical and rational deliberation and to the cultivation of psycho-moral flexibility. This leads indirectly to moral growth and strengthening of professional character. (shrink)

La presente versión del tratado De Bono Habitu Liber o El libro sobre la buena condición, de Galeno de Pérgamo, se presenta al lector de habla hispana como un acercamiento a la prolífca obra flosófca de quien fuera reconocido en su época como un notable médico anatomista y físico. Los argumentos expuestos por el autor acerca de la ‘buena condición’ dan cuenta de la infuencia retórica de Platón y Aristóteles, al mismo tiempo, de las enseñanzas médicas de Hipócrates. Junto al (...) texto original y la traducción al español, se ofrece una versión en latín empleada en el proceso de traducción como un apoyo para resolver las difcultades textuales y léxicas que presentaba el texto griego, al permitir confrontar una recepción medieval del tratado. (shrink)

Explaining how stereotypes and norms influence role-identities during reflected appraisal processes, we develop a theory about diverse groups of minority men—the “minority masculinity stress theory”—and apply it to Asian American men. We conceptually integrate hegemonic masculinity, stereotypes, and mental health to examine how Asian American men experience masculinity and how their experiences are uniquely stressful. We analyze elicited text from an open-ended questionnaire to explain two experiences of masculinity-related stress: trying to live up to the masculine ideal and enacting work-related (...) role-identities. Regarding the former, we discuss four illustrations—toughness, body image, restrictive emotionality, and heterosexuality—and two involving the latter—achiever and provider. We found that Asian American men receive stereotypical reflected appraisals that contradict potentially positive self-concepts and emphasize achievement beyond typical standards of hegemonic masculinity. Moreover, Asian American men’s role-identities contradict hegemonic masculinity, resulting in reflected appraisals that predispose them toward stress. (shrink)