We present a description of the Stern–Gerlach type experiments using only the concepts of classical electrodynamics and the Newton’s equations of motion. The quantization of the projections of the spin (or the projections of the magnetic dipole) is not introduced in our calculations. The main characteristic of our approach is a quantitative analysis of the motion of the magnetic atoms at the entrance of the magnetic field region. This study reveals a mechanism which modifies continuously the orientation of the magnetic (...) dipole of the atom in a very short time interval, at the entrance of the magnetic field region. The mechanism is based on the conservation of the total energy associated with a magnetic dipole which moves in a non uniform magnetic field generated by an electromagnet. A detailed quantitative comparison with the (1922) Stern–Gerlach experiment and the didactical (1967) experiment by J.R. Zacharias is presented. We conclude, contrary to the original Stern–Gerlach statement, that the classical explanations are not ruled out by the experimental data. (shrink)

La respuesta a la pregunta del título se ofrece en tres niveles. A veces las diferencias se deben a las limitaciones del equipo empleado, deficiencias en el muestreo o preferencias en la interpretación de los datos. Otras veces se deben a que los investigadores operan en base a paradigmas diferentes..

The effects of the vacuum electromagnetic fluctuations and the radiation reaction fields on the time development of a simple microscopic system are identified using a new mathematical method. This is done by studying a charged mechanical oscillator (frequency Ω 0)within the realm of stochastic electrodynamics, where the vacuum plays the role of an energy reservoir. According to our approach, which may be regarded as a simple mathematical exercise, we show how the oscillator Liouville equation is transformed into a Schrödinger-like stochastic (...) equation with a free parameter h′ with dimensions of action. The role of the physical Planck's constant h is introduced only through the zero-point vacuum electromagnetic fields. The perturbative and the exact solutions of the stochastic Schrödinger-like equation are presented for h′>0. The exact solutions for which h′<h are called sub-Heisenberg states. These nonperturbative solutions appear in the form of Gaussian, non-Heisenberg states for which the initial classical uncertainty relation takes the form 〈(δx 2)〉〈(δp) 2 〉=(h′/2) 2,which includes the limit of zero indeterminacy (h → 0). We show how the radiation reaction and the vacuum fields govern the evolution of these non-Heisenberg states in phase space, guaranteeing their decay to the stationary state with average energy hΩ 0 /2 and 〈(δx) 2 〉〈(δp) 2 〉=h 2 /4 at zero temperature. Environmental and thermal effects-are briefly discussed and the connection with similar works within the realm of quantum electrodynamics is also presented. We suggest some other applications of the classical non-Heisenberg states introduced in this paper and we also indicate experiments which might give concrete evidence of these states. (shrink)

The overflow of scientific literature stimulates poor reading habits which can aggravate science's reproducibility crisis. Thus, solving the reproducibility crisis demands not only methodological changes, but also changes in our relationship with the scientific literature, especially our reading habits. Importantly, this does not mean reading more, it means reading better.

Graphical AbstractThis paper discusses how our bad reading habits are starting to influence how we write. This short abstract and the picture next to it summarize the arguments in this paper. Just kidding, they do not. One really needs to read the paper for that.

En este trabajo nos proponemos analizar la doble función que cumple el relativismo: por un lado, constituye una crítica a la visión fundacionista que caracterizó a una parte importante de la filosofía de la ciencia contemporánea, específicamente el Positivismo Lógico y algunos de sus herederos. Por otra parte, ofrece una interpretación sobre los aspectos sincrónicos y diacrónicos de la ciencia, que se presenta como una alternativa a las principales caracterizaciones que se hicieron de la ciencia contemporánea, particularmente de su evolución, (...) en el ámbito de la filosofía. Aunque esta concepción relativista de la ciencia tiene múltiples expresiones, por la extensión de este trabajo, sólo nos ocuparemos de algunos aspectos relacionados con los componentes relativistas de la imagen de la ciencia que ofrece Thomas S. Kuhn. (shrink)

In recent years there has been a wealth of studies investigating how memories are allocated in the hippocampus. Some of those studies showed that it is possible to manipulate the identity of neurons recruited to represent a given memory without affecting the memory's behavioral expression. Those findings raised questions about how the hippocampus represents memories, with some researchers arguing that hippocampal neurons do not represent fixed stimuli. Herein, an alternative hypothesis is argued. Neurons in high‐order brain regions can be tuned (...) to multiple dimensions, forming complex, abstract representations. It is argued that such complex receptive fields allow those neurons to show some flexibility in their responses while still representing relatively fixed sets of stimuli. Moreover, it is pointed out that changes induced by artificial manipulation of cell assemblies are not completely redundant—the observed behavioral redundancy does not imply cognitive redundancy, as different, but similar, memories may induce the same behavior. (shrink)

We give an example in which it is possible to understand quantum statistics using classical concepts. This is done by studying the interaction of chargedmatter oscillators with the thermal and zeropoint electromagnetic fields characteristic of quantum electrodynamics and classical stochastic electrodynamics. Planck's formula for the spectral distribution and the elements of energy hw are interpreted without resorting to discontinuities. We also show the aspects in which our model calculation complement other derivations of blackbody radiation spectrum without quantum assumptions.

The development and use of advanced and innovative neuroscience, neurotechnology and some forms of artificial intelligence have exposed potential threats to the human condition, including human rights. As a result, reconceptualizing or creating human rights (i.e. neurorights) has been proposed to address specific brain and mind issues like free will, personal identity and cognitive liberty. However, perceptions, interpretations and meanings of these issues—and of neurorights—may vary between countries, contexts and cultures, all relevant for an international-consensus definition and implementation of neurorights. (...) Thus, we encourage reflecting on the proactive inclusion of transnational, cross-cultural and contextual considerations and concerns to contribute to the global discourse. This inclusion does not mean endorsing ethical relativism but rather a call to foster a universal understanding of key concepts and concerns. Including contextual and cultural perspectives may truly anticipate global concerns which could be addressed while developing and implementing neurorights. Consequently, any ethical and/or legal regulatory framework(s) for the translational and transnational use of advanced neuroscience, neurotechnology and some forms of artificial intelligence intended to protect and safeguard human dignity should be contextually and culturally mindful, responsible, respectful and inclusive of not only human rights and fundamental freedoms but also of neurocognitive cultural diversity. (shrink)

The effects of the vacuum electromagnetic fluctuations and the radiation reaction fields on the time development of a simple microscopic system are identified using a new mathematical method. This is done by studying a charged mechanical oscillator (frequency Ω 0)within the realm of stochastic electrodynamics, where the vacuum plays the role of an energy reservoir. According to our approach, which may be regarded as a simple mathematical exercise, we show how the oscillator Liouville equation is transformed into a Schrödinger-like stochastic (...) equation with a free parameter h′ with dimensions of action. The role of the physical Planck's constant h is introduced only through the zero-point vacuum electromagnetic fields. The perturbative and the exact solutions of the stochastic Schrödinger-like equation are presented for h′>0. The exact solutions for which h′shrink)

In this introduction to the first installment of the Common Knowledge symposium on xenophilia, the editor explains the rationale of the new project, citing increases in aggressive xenophobia internationally. He comments on the intergroup-relations theorist Todd Pittinsky's argument that, since tolerance is not logically the antithesis of negative feelings toward out-groups, even long-established traditions of toleration are inadequate to prevent intergroup aggression. Pittinsky proposes that tolerance be replaced, as a principle of peacekeeping, by the encouragement of positive feelings toward out-groups, (...) and the author of this essay responds by showing how the Freudian theory of ambivalence and the history of literature on which Freud drew in constructing it support Pittinsky's viewpoint. Enemies regularly fall in love, above all in Shakespearean drama, which Freud explains by arguing that all human relations are love-hate relations. Thus, this essay suggests, it takes as much psychic energy to repress the love in what appear to be relationships of hatred as to repress the hatred in what appear to be relationships of love. There is a metaphysical component as well to this argument: the xenophobe and xenophile equally presuppose that the identity principle is applicable to society as well as to mathematics; both assume that each discrete social group is self-identical and differs from all other groups more or less radically. The main difference between –phile and –phobe is the latter's relative incapacity to live with ambivalence. Given these arguments, one must expect to find negative as well as positive motives in the etiology and conduct of xenophilia—and the first installment of the Common Knowledge symposium is said to focus on cases of xenophilia in which varieties of enmity accompany that singular and underrated variety of love. (shrink)

We make a brief review of the Kramers escape rate theory for the probabilistic motion of a particle in a potential well U(x), and under the influence of classical fluctuation forces. The Kramers theory is extended in order to take into account the action of the thermal and zero-point random electromagnetic fields on a charged particle. The result is physically relevant because we get a non-null escape rate over the potential barrier at low temperatures (T → 0). It is found (...) that, even if the mean energy is much smaller than the barrier height, the classical particle can escape from the potential well due to the action of the zero-point fluctuating fields. These stochastic effects can be used to give a classical interpretation to some quantum tunneling phenomena. Relevant experimental data are used to illustrate the theoretical results. (shrink)

Bibliographic negligence, i.e. omission of citation of the relevant work of other researchers, is possibly the most common type of research misconduct, leading to unfair loss of priority of authorship and undermining the reward system of science. We report a case of bibliographic negligence which we recently suffered from a leading biomedical journal. The case is discussed in the context of the editorial policy of the journal and of relevant ethical guidelines. Scientific journals should develop codes of conduct for citations. (...) In addition, the implications and consequences of bibliographic negligence deserve thorough investigation. (shrink)

We consider the simple case of a nonrelativistic charged harmonic oscillator in one dimension, to investigate how to take into account the radiation reaction and vacuum fluctuation forces within the Schrödinger equation. The effects of both zero-point and thermal classical electromagnetic vacuum fields, characteristic of stochastic electrodynamics, are separately considered. Our study confirms that the zero-point electromagnetic fluctuations are dynamically related to the momentum operator p=−i ℏ ∂/∂ x used in the Schrödinger equation.

There is growing interest in tissue procurement for cancer research through autopsy. Establishing an autopsy/tissue donation programme for breast cancer research within an academic medical centre i...

Pretende-se nesse artigo confrontar as posições de Theodor Adorno e Friedrich Hegel acerca da concepção de progresso, inferidas do rearranjo adorniano das categorias de particular e universal, que depreendem da filosofia hegeliana. O propósito é expor a crítica de Adorno, formulada na Dialética negativa, à noção de Hegel de que o curso da história universal é a realização efetiva do progresso do espírito do mundo em suas figuras particulares. Para tanto, o particular e o universal serão tomados como categorias explicativas (...) da crítica adorniana à totalidade e à sistematicidade, no intuito de realocar o particular no interior da dialética, enfatizando seu caráter não identitário e resistente à sistematicidade e às formas de totalidade com pretensões universalizantes; em seguida, evocar-se-á os elementos da filosofia da história de Walter Benjamin presentes no pensamento de Adorno, para que, por fim, se sustente a hipótese de que a marcha do espírito condiz menos com o progresso, porém, muito mais com a regressão, o que ocorre na medida em que o progresso se serve de uma narrativa que oblitera a violência e a dominação do universal sobre o particular, ao ocultar as contradições deflagradas no contexto da marcha da história do espírito do mundo. (shrink)

Caracterización de un grupo de comités de ética en investigación en Colombia Caracterização de um grupo de comitês de ética em pesquisa na Colômbia In the last decades, controlled clinical trials sponsored by the pharmaceutical industry have increased considerably. This has led to the need for greater control and assistance by regulators and ethics committees to ensure appropriate compliance with established ethical standards and good clinical practices in general. In Colombia, the National Food and Drug Surveillance Institute, the regulator in (...) the country, controls and monitors the operation of clinical research with drugs. In 2008, this entity issued Resolution 2378, which provides and regulates research actors in Colombia, including ethics committees. After being in force for several years, it is necessary to know whether research ethics committees in Colombia operate in accordance with this regulation and to determine the status of implementation of the requirements therein. For this purpose, a survey was designed to be voluntarily answered and a response was obtained from 25 of the 69 certified committees in Colombia. Twenty-two of them could be analyzed because their information was complete. Compared with previous studies, favorable changes in development and organization were observed in accordance with the current proposed regulation. Para citar este artículo / To reference this article / Para citar este artigo Suárez-Obando F, Reynales H, Urina M, Camacho J, Viteri M. Caracterización de un grupo de comités de ética en investigación en Colombia. pers. bioét. 2018; 22: 303-318. DOI: 10.5294/pebi.2018.22.2.8. (shrink)

This book argues that natural law - when construed as an epistemological and trans-cultural lingua franca, adjudged capable of legitimating the rational intelligibility and universal applicability of specific Christian moral principles within contemporary "secular" discourse - has failed. Through a detailed analysis of the contributions of three prominent natural law theorists who are located within a shared philosophical-theological tradition, namely, John Finnis, Jean Porter, and John Milbank, the text will seek to illuminate the extent to which this failure is as (...) much intramural as it is extramural. (shrink)

The book, volume 42 in the Boston Studies in the Philosophy of Science, consists principally of two interconnected essays in theoretical biology. The first, entitled "Biology of Cognition," was written in 1969 by Humberto R. Maturana, a Chilean neurophysiologist and anatomist whose earlier work included studies of vision in birds and the frog. The second essay, "Autopoiesis: the Organization of the Living," is an expansion of certain sections in the first and was written in 1972 by Maturana and Francisco (...) J. Varela, a philosophical biologist. Although Maturana alone is responsible for the introduction, the two essays are said to represent one point of view, expressed in the concept of "autopoiesis." The term, "a word without a history," was invented to convey "the central feature of the organization of the living, which is autonomy". Autopoiesis, it is claimed, enables us to say at once, through the logic of a self-referring homeostatic system, what is organic life and cognition. "Living systems are cognitive systems, and living as a process is a process of cognition". (shrink)

ABSTRACTThis article reviews Humberto Llavador, John Roemer, and Joaquim Silvistre’s 2015 book on the economics of climate change, Sustainability for a Warming Planet. While the book is written for economists, its arguments should be of interest to environmental philosophers and interdisciplinary scholars of climate change. After summarizing the book’s chapters, I offer modest criticisms and a brief commentary on the scope and limits of economic modeling of climate change decisions.

Manuel Moyano y Humberto M. Trujillo Dept. de Educación, Universidad de Córdoba, España Dept. de Metodología … Read More →.

An approach which has the purpose to catch what characterizes the specificity of a living system, pointing out what makes it different with respect to physical and artificial systems, needs to find a new point of view – new descriptive modalities. In particular it needs to be able to describe not only the single processes which can be observed in an organism, but what integrates them in a unitary system. In order to do so, it is necessary to consider a (...) higher level of description which takes into consideration the relations between these processes, that is the organization rather than the structure of the system. Once on this level of analysis we can focus on an abstract relational order that does not belong to the individual components and does not show itself as a pattern, but is realized and maintained in the continuous flux of processes of transformation of the constituents. Using Tibor Ganti’s words we call it “Order in the Nothing”. In order to explain this approach we analyse the historical path that generated the distinction between organization and structure and produced its most mature theoretical expression in the autopoietic biology of Humberto Maturana and Francisco Varela. We then briefly analyse Robert Rosen’s (M,R)-Systems, a formal model conceptually built with the aim to catch the organization of living beings, and which can be considered coherent with the autopoietic theory. In conclusion we will propose some remarks on these relational descriptions, pointing out their limits and their possible developments with respect to the structural thermodynamical description. -/- . (shrink)

“Tanzanya’da Leibzig Misyoner Cemiyeti Misyonerliği, Karşılaşılan Zorluklar ve Kullanılan Yöntemler” isimli makale “Tanzanya’da Misyonerlik Faaliyetler Lutheran Kilise Örneği” isimli yüksek lisans tezine dayanmaktadır. Makale, Lutheran misyonerliğinin Tanzanya’da faaliyetlerine nasıl başladıkları, ilerleme yöntemleri ve karşılaşılan güçlükleri anlama noktasında önem arz etmektedir. Makalede ana konuya odaklanmadan önce, Tanzanya hakkında genel bir bilgilendirme yapılmış, ardından Leibzig Misyon Cemiyeti’nin (LMS) faaliyetlerine nasıl başladığı, kronolojik bir şekilde açmış olduğu istasyonlar, bu istasyonlarda karşılaşmış olduğu zorluklar ve kullanılan yöntemler hakkında bilgi verilmiştir. Ayrıca, Tanzanya’da Lutheran misyoner cemiyetlerinin, (...) Tanzanya Evanjelik Lutheran Kilisesi (Tanzania Evangelical Lutheran Church in Tanzania) ELCT ile tek bir kilise çatı altında toplanması ele alınmıştır. Son olarak, ELCT’nin kabul etmiş olduğu ilkeler ve Martin Luther’in öğretilerinin Afrika’daki yansımaları üzerinde durulmuştur. Makale, sadece misyonerleri ve misyonerlik faaliyetlerini değil, ayrıca muhatap olunan ve yüzyıllardır sömürgeleştirilen Afrika halkını anlamamıza da yardımcı olmaktadır. Araştırma, Lutheran misyonerliğinin Tanzanya’da başlamış olduğu 19. yüzyıl sonu ve yoğunlaştığı 20. yüzyıl ile sınırlandırılmıştır. Otto von Bismarck’ın (1815-1898) katkılarıyla gerçekleşen Berlin Konferansı sayesinde, batılı ülkelerin bayrakları ile haçları da sömürge topraklarına girmiştir. Tanzanya'da Lutheran Misyon, Johann Ludwig Krapf (1810-1881) ve Johannes Rebmann'ın (1820-1876) CMS tarafından görevlendirilmeleri sonucu başlamıştır. LMS, CMS'den 1892 tarihinde görevi devralmıştır ve Machame, Mamba, Old Moshi, Pare, Meru'da faaliyet göstermiştir. Misyon faaliyetleri süresince, savaşlar, kıtlık ve salgın, çok eşlilik, sünnet uygulaması, tanrı anlayışı gibi birçok zorlukla karşılaşılmıştır. Zorluklar, onları ortadan kaldırmaya yardımcı olacak; eğitim, sağlık, bütüncül hizmet, ortak dil (lingua franca), Kutsal Kitap çevirileri, ev ziyaretleri, yerli yardımcılar ve yerlileştirme gibi yöntemleri de beraberinde getirmiştir. Tanzanya’da LMS dışında; Katolik Kutsal Ruh Babaları (Holy Ghost Father/ Spiritanlar), Katolik Beyaz Babalar (Peres Blancs), Katolik Benediktinler, Anglikan Kilise Misyon Topluluğu (Chuch Missionary Society) CMS, Anglikan Üniversitelerin Orta Afrika Misyonu (The Universities’ Mission to Central Africa) UMCA gibi misyon grupları mevcuttur. Tanzanya'da bulunan Lutheran Misyon toplulukları, Evanjelik Lüteriyen Kilisesi (ELCT) adı altında 1963 yılında tek bir çatı altında toplanmıştır. ELCT bugün 5,2 milyon üyesi ile Tanzanya nüfusu içinde hatırı sayılır bir yere sahiptir. Bu çalışmada, deskriptif yöntem kullanılmıştır. Ulaşılabilen tüm ilk kaynaklara inilerek Lutheran misyonerler ve Tanzanya hakkında bilgi verilmiştir. Çalışmada Türkçe kaynaklara yer verilmekle birlikte yabancı kaynak kullanımına ve misyon topluluklarının bilinen kısaltmalarının kullanılmasına önem gösterilmiştir. (shrink)

Jacob (history, New School for Social Research) proposes that the science of the 17th and 18th centuries was eventually accepted because it was made compatible with larger political and economic interests. A celebration of the recently concluded 33 volume edition of the Collected works of John Stuart Mill, produced over a period of nearly 30 years, the last 20 under the guiding genius (and hand) of general editor Robson. Following a tributary history of the project itself, essays cover Mill's career (...) as a thinker and as a bureaucrat and public servant, exploring the effects of the various milieu--domestic, political, administrative, religious, and cultural--in which he moved. Annotation copyrighted by Book News, Inc., Portland, OR. (shrink)

Charting the development of the British tradition of naturalism from the 17th to the 19th century, this book provides fascinating insight into a wide range of thinkers, both Catholic and Protestant, who explored the themes of proof, practice, and the role of common sense. Reappraising what these thinkers can teach us about the relations between belief, action, and skepticism, Ferreira contributes to the philosophical study of naturalist replies to skepticism, as well as to a deeper appreciation of this particular segment (...) of British intellectual history. (shrink)

The practice of the construction and articulation of knowledge according to principles that allow for universal comprehension and progressive appraisal has established itself as one of the self-dis...

Philosophical Thought in Russia in the Second Half of the 20th Century is the first book of its kind that offers a systematic overview of an often misrepresented period in Russia's philosophy. Focusing on philosophical ideas produced during the late 1950s – early 1990s, it reconstructs the development of genuine philosophical thought in the Soviet period and introduces those non-dogmatic Russian thinkers who saw in philosophy a means of reforming social and intellectual life. Covering such areas of philosophical inquiry as (...) philosophy of science, philosophical anthropology, the history of philosophy, activity approach as well as communication and dialogue studies, the volume presents and thoroughly discusses central topics and concepts developed by Soviet thinkers in that particular fields. Written by a team of internationally recognized scholars from Russia and abroad, it examines the work of well-known Soviet philosophers (such as Mikhail Bakhtin, Evald Ilyenkov and Merab Mamardashvili) as well as those important figures (such as Vladimir Bibler, Alexander Zinoviev, Yury Lotman, Georgy Shchedrovitsky, Genrich Batishchev, Sergey Rubinstein, and others) who have often been overlooked. By introducing and examining original philosophical ideas that evolved in the Soviet period, the book confirms that not all Soviet philosophy was dogmatic and tied to orthodox Marxism and the ideology of Marxism-Leninism. It shows Russian philosophical development of the Soviet period in a new light, as a philosophy defined by a genuine discourse of exploration and intellectual progress, rather than stagnation and dogmatism. In addition to providing the historical and cultural background that explains the development of the 20th-century Russian philosophy, the book also puts the discussed ideas and theories in the context of contemporary philosophical discussions showing their relevance to nowadays debates in Western philosophy. With short biographies of key thinkers, an extensive current bibliography and a detailed chronology of Soviet philosophy, this research resource provides a new understanding of the Soviet period and its intellectual legacy 100 years after the Russian Revolution. (shrink)

Lots of Websites offer the possibility to donate human beings. Another problem of ethics of communications.