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..

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)

The human fovea is known for its distinctive pit‐like appearance, which results from the displacement of retinal layers superficial to the photoreceptors cells. The photoreceptors are found at high density within the foveal region but not the surrounding retina. Efforts to elucidate the mechanisms responsible for these unique features have ruled out cell death as an explanation for pit formation and changes in cell proliferation as the cause of increased photoreceptor density. These findings have led to speculation that mechanical forces (...) acting within and on the retina during development underly the formation of foveal architecture. Here we review eye morphogenesis and retinal remodeling in human embryonic development. Our meta‐analysis of the literature suggests that fovea formation is a protracted process involving dynamic changes in ocular shape that start early and continue throughout most of human embryonic development. From these observations, we propose a new model for fovea development. (shrink)

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)

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)

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)

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...

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)

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.

Lectures by a Jain religious leader on Rahasyapūrṇa ciṭṭhī by Ṭodaramala, 1740-1766, and Paramārtha vacanikā and Upādānanimittanī ciṭṭhī by Banārasīdāsa, 1586-1641?, works on Jaina philosophy.

Commemorative volume of contributed articles on the life and work of Maolānā̄ Olī Āhamada Niyāmapurī, 1885-1960, Islamic scholar, philosopher and multilingual poet from Chattagram District, Bangladesh.

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)

This paper offers responses to the challenges and questions rasied by the comments of John M. Meyer, Gwen Ottinger, Mark Reiff, and Steve Vanderheiden to my book Mobilizing Hope: Climate Change and Global Poverty. Their concerns are insightful, many, and varied. My reply focuses on the following themes: The relationship between moral concern about climate change and moral concern abut global poverty, the role of hope in responding to climate change, the problem of plutocratic influences in democratic politics and international (...) negotiations, the role of technology in responding to climate change, and the value presuppostion of the book. I cannot do justice to all of the interesting points the commentators make, but I hope at least to have mustered decent replies in these areas. (shrink)

The ethical and legal challenges posed by assisted reproduction techniques are both profound and breathtaking, with most societies unable to fully comprehend one technique before another one, even more daring, emerges. The wrongful implantation of embryos in two women undergoing in vitro fertilisation treatments at two separate clinics in the UK seriously vitiates the traditional concept of who is a parent. In one case, a patient’s embryos were wrongly implanted into another woman seeking similar treatment, and in the second, a (...) woman’s eggs were fertilised using sperm from a man other than her husband.In the first mix-up, neither member of the recipient couple was the genetic parent of the child, while in the second case, the recipient mother was the genetic mother and her husband was not the genetic father. The mix-ups resulted in litigation to determine who the rightful parents were. First, I will show in this paper that, although the outcome of the application of English law in both cases was in agreement with the outcome prescribed by basic principles of Islamic law and bioethics, that agreement is based on different reasoning in the two traditions. Next, I will show that the profound ethical implications of reproductive technologies begs for a more pluralistic bioethical discourse than the one-dimensional analysis applied by secular Western societies that currently dominates the enquiry, particularly as most Western societies are more or less multicultural and multireligious. (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)

In the United Kingdom, the debate about how best to meet the shortfall of organs for transplantation has persisted on and off for many years. It is often presumed that the answer is simply to alter the law to a system of presumed consent. Acting perhaps on that presumption in his annual report launched in July, the Chief Medical Officer, Sir Liam Donaldson, advocated a system of organ donation based on presumed consent, the so-called “opt-out” system.1 He is calling for (...) a change in the law in England and Wales whereby consent to organ donation is presumed, making a person’s organs automatically available for transplantation after death, unless they registered objections to this while alive. Subsequently, the British Medical Association lent its support to the introduction of such a system.2 The BMA contends that “the practice of presumed consent legislation has had a significant effect on the number of cadaveric donors per million population.”2It is often taken for granted that there must be a correlation between the enactment of legislation on presumed consent and an increase in organ donation and procurement. However, the correlation is not as straightforward as it might seem. It may be that other practical measures to encourage organ donation could be implemented without changing the Human Tissue Act 2004, an Act which has been in force for barely a year.An analysis by Abadie and Gay demonstrated that “presumed consent legislation has a positive and sizeable effect on organ donation rates”,3 but they themselves admitted that the correlation between rates of donation and presumed consent legislation is “not completely unequivocal”.3 It is true that among the most successful cases in procurement rates are countries with presumed consent legislation . However, since some of the …. (shrink)

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