Background: Magnetic resonance spectroscopic imaging is a neuroimaging technique that may be useful for non-invasive mapping of brain temperature over a large brain volume. To date, intra-subject reproducibility of MRSI-based brain temperature has not been investigated. The objective of this repeated measures MRSI-t study was to establish intra-subject reproducibility and repeatability of brain temperature, as well as typical brain temperature range.Methods: Healthy participants aged 23–46 years were scanned at two time points ~12-weeks apart. Volumetric MRSI data were processed by reconstructing (...) metabolite and water images using parametric spectral analysis. Brain temperature was derived using the frequency difference between water and creatine for 47 regions of interest delineated by the modified Automated Anatomical Labeling atlas. Reproducibility was measured using the coefficient of variation for repeated measures, and repeatability was determined using the standard error of measurement. For each region, the upper and lower bounds of Minimal Detectable Change were established to characterize the typical range of TCRE values.Results: The mean global brain temperature over all subjects was 37.2°C with spatial variations across ROIs. There was a significant main effect for time [F = 37.0, p < 0.0001] and for brain region [F = 2.66, p < 0.0001]. The time*brain region interaction was not significant [F = 0.80, p = 0.83]. Participants' TCRE was stable for each ROI across both time points, with ROIs' COVrep ranging from 0.81 to 3.08% ; majority of ROIs had a COVrep <2.0%.Conclusions: Brain temperature measurements were highly consistent between both time points, indicating high reproducibility and repeatability of MRSI-t. MRSI-t may be a promising diagnostic, prognostic, and therapeutic tool for non-invasively monitoring brain temperature changes in health and disease. However, further studies of healthy participants with larger sample size and numerous repeated acquisitions are imperative for establishing a reference range of typical brain TCRE, as well as the threshold above which TCRE is likely pathological. (shrink)

Chciałem Go pożegnać. Kilkakrotnie próbowałem napisać choć parę słów. O Nim samym. Okazało się, że nie potrafię. Udało mi się tylko przedstawić Jego poglądy na reizm Tadeusza Kotarbińskiego, ale uczyniłem to gdzie indziej. Muszę tu poprzestać na ofiarowaniu Mu tego, co napisałem na Jego dziewięćdziesiąte urodziny, w osiemdziesięciolecie naszej przyjaźni.

The class of recursive functions over the reals, denoted by , was introduced by Cristopher Moore in his seminal paper written in 1995. Since then many subsequent investigations brought new results: the class was put in relation with the class of functions generated by the General Purpose Analogue Computer of Claude Shannon; classical digital computation was embedded in several ways into the new model of computation; restrictions of were proved to represent different classes of recursive functions, e.g., recursive, primitive recursive (...) and elementary functions, and structures such as the Ritchie and the Grzergorczyk hierarchies.The class of real recursive functions was then stratified in a natural way, and and the analytic hierarchy were recently recognised as two faces of the same mathematical concept.In this new article, we bring a strong foundational support to the Real Recursive Function Theory, rooted in Mathematical Analysis, in a way that the reader can easily recognise both its intrinsic mathematical beauty and its extreme simplicity. The new paradigm is now robust and smooth enough to be taught. To achieve such a result some concepts had to change and some new results were added. (shrink)

Jerzy Perzanowski s ideas were based on an original blend of logic and ontology in what he called onto/logic, where the slash is meant to suggest a quotient of ontology by logic. Perzanowski began as a logician, his early works being on modal logic, then gradually shifted his interest to logical philosophy, meaning not so much philosophy of logic as philosophy informed by logic. Perzanowski was a rare breed of analytical philosopher who thought that a philosophical theory of everything (...) was worthwhile. In this systematic spirit, he began with method. He presented his method of total analysis and synthesis quite simply: reduce the object of research to its simplest possible constituents, and then combine them in some way. Better still, combine them in every possible way, thereby producing a space of possibilities analogous to (and in certain cases identical with) the logical space. Thus, analysis and synthesis differ from a trivial disassembly and reassembly.". (shrink)

Problem ukrytości Boga staje się coraz częściej dyskutowanym tematem filozoficznym. W swoim artykule chciałbym zająć się kwestią nazwaną przez Jacka Wojtysiaka (w jego książce Między jawnością a ukryciem) (Wojtysiak 2023) „wiedzą testymonialną” i powiązać ją z Newmanowską koncepcją rozumowania implikatywnego. Odróżnienie od siebie dwóch rodzajów rozumowania — jednego spontanicznego, praktycznego, znajdującego swoje zastosowanie m.in. w obszarze wiary i moralności, oraz drugiego krytycznego, analitycznego i retrospektywnego, używanego w nauce, a także w filozofii i teologii – wydaje mi się kluczowe dla zrozumienia (...) obserwowalnej ukrytości Boga. (shrink)

Science and Convention: Essays on Henri Poincare's Philosophy of Science and The Conventionalist Tradition contains essays concerned with Henri Poincare's philosophy of science, physics in particular, and with the conventionalist tradition in philosophy that he revived and reshaped, simultaneously with, but independently of, Pierre Duhem. Separating five essays as chapters, the book discusses the main ideas of the philosophy (Essays 1 and 5), traces at least some of its historical background (Essays 1, 2, and 3), and provides some of its (...) developments (Essays 2 and 4). (shrink)

The paper defends a dynamic view of reality which is founded on the assumption of the existence of the flow of time. This vindication makes use of a metaphysical theory of the flow of time developed by the author which is based on the notion of dynamic existence. It is shown that such a conception allows one to explain the fundamental phenomena connected with the flow of time, namely the continuous changing of the present, the endurance of things, and the (...) asymmetry of time. It is also argued that the proposed approach may be of some virtue for the empirical sciences because it explains the ubiquitous interest of scientists in the evolution of dynamic systems of different kinds, and provides us with an arrow of time which is lacking in theories describing fundamental physical interactions. The argument is advanced which aims to show that physics is unable to provide us with a theory of the flow of time and that we should look for such a theory in metaphysics. Thus, an approach to the relation between metaphysics and physics is vindicated that may help to overcome the difficulties blocking our understanding of reality as a dynamic one. (shrink)

W publikacji autor analizuje powszechność wdrażania określonych kategorii innowacji w przedsiębiorstwach funkcjonujących w krajach Unii Europejskiej. Analizy dokonano w dwóch przekrojach: 1) państw członkowskich Unii Europejskiej, 2) przynależności sektorowej przedsiębiorstw. Podstawą dla tej analizy są wyniki badań kwestionariuszowych przeprowadzonych w kwietniu 2009 r. przez the Gallup Organization wśród 5034 przedsiębiorstw. Respondentami byli przedstawiciele zarządów tych przedsiębiorstw. Celem publikacji jest dokonanie statystycznej analizy odpowiedzi respondentów na temat powszechności wdrażania innowacji.

The article presents several examples of different mathematical structures and interprets their properties related to the existence of universal functions. In this context, relations between the problem of totality of elements and possible forms of universal functions are analyzed. Furthermore, some global and local aspects of the mentioned functional systems are distinguished and compared. In addition, the paper attempts to link universality and totality with the dynamic and static properties of mathematical objects and to consider the problem of limitations in (...) the construction of structures combining harmoniously the availability of information at the local and global level. (shrink)

Table of ContentsAndrzej KLAWITER, Krzystof #ASTOWSKI: Introduction: Originality, Courage and Responsibility List of Books by Leszek NowakSelected Bibliography of Leszek Nowak's WritingsScience and Idealization Theo A.F. KUIPERS: On Two ...

This short note is a summary of the talk given at the Adam Mickiewicz University in Poznań during the conference on Philosophy of Mathematics, III , on October 17, 2011. We suggest to understand mathematical intuition as a collection of (verbalized) judgments constituting the core of the context of discovery in mathematics. Mathematical intuition is present not only in the axioms: it can be observed in mathematical research practice as well. A few examples of mathematical intuition in action are given. (...) We discuss the dynamic character of mathematical intuition, trying to reveal the sources of the corresponding changes of intuitive views in mathematics. There are several such sources, e.g.: paradoxes, new research programs (for instance, the program of arithmetization of analysis), explicit definitons of concepts understood so far in an intuitive way, and – of course – the development of the mathematical knowledge itself. We devote special attention to the distinction between standard, exception, and pathology. Finally, we say a few words about conflicts of intuitions in mathematics. (shrink)

Contents: INTRODUCTION. Kazimierz TWARDOWSKI: The Majesty of the University. I. Zygmunt ZIEMBI??N??SKI: What Can Be Saved of the Idea of the University? Leszek KO??l??AKOWSKI: What Are Universities for? Leon GUMA??N??SKI: The Ideal University and Reality. Zygmunt BAUMAN: The Present Crisis of the Universities. II. Kazimierz AJDUKIEWICZ: On Freedom of Science. Henryk SAMSONOWICZ: Universities and Democracy. Jerzy TOPOLSKI: The Commonwealth of Scholars and New Conceptions of Truth. Klemens SZANIAWSKI: Plus ratio quam vis. III. Leon KOJ: Science, Teaching and Values. Klemens (...) SZANIAWSKI: The Ethics of Scientific Criticism. Jerzy BRZEZI??N??SKI: Ethical Problems of Research Work of Psychologists. IV. Janusz GO??L??KOWSKI: Tradition in Science. Jerzy KMITA: Is a "Creative Man of Knowledge" Needed in University Teaching? Leszek NOWAK: The Personality of Researchers and the Necessity of Schools in Science. RECAPITULATION. Jerzy BRZEZI??N??SKI: Reflections on the University. (shrink)

Jerzy Franczak comprehensively presents Jacques Rancière's thought by emphasizing the relations between politics and literature. The detailed analysis considers the context of modern aesthetics and political philosophy, which is why the book introduces further protagonists, such as Louis Althusser, Michel Foucault, Pierre Bourdieu, or Jean-François Lyotard. Franczak first reconstructs Rancière's original philosophy of literature so as to then immediately apply it in readings of select world literature masterpieces by Gustav Flaubert, Max Jacob, Bertold Brecht, Vladimir Nabokov, and Philip Roth.

W latach 1931-1934 Kazimierz Ajdukiewicz sformułował dwie wersje teorii znaczenia. Tarski wykazał, że druga wersja teorii dopuszcza moż- liwość istnienia równoznacznych nazw o różnej denotacji. Cecha ta zo- stała uznana przez Tarskiego i Ajdukiewicza za dyskwalifikującą teorię. W artykule dokonuję porównania obu wersji teorii, przede wszystkim ze względu na podstawową definicję wzajemnej wymienialności wyrażeń. Pokazuję, że wbrew rozpowszechnionej opinii zarzut Tarskiego dotyczy także pierwszej wersji teorii. Siła argumentu Tarskiego opiera się na założeniu, że żadna adekwatna teoria znaczenia nie może dopuszczać (...) istnienia równoznacznych nazw o różnej denotacji. Podejmuję dyskusję z tym stanowiskiem. (shrink)