Janette Dinishak’s work has helped shed critical light on the scientifically questionable and ethically troubling tendency in psychology and philosophy of mind to theorize autistic people as deficient empathizers. In a recently published reply on the Social Epistemology Review and Reply Collective, Dinishak (2024) brings her important perspective on this topic to bear on our paper “AAC Technology, Autism, and the Empathic Turn” (2022). Dinishak is largely sympathetic to our view while also raising a number of rich and thoughtful philosophical (...) questions. Since each of these questions is capable of jumpstarting a lengthy exchange, we focus our response on those questions that, we hope, are particularly fruitful for advancing further conversation. With this aim in mind, we also engage with some of Dinishak’s own insights from her 2016 chapter “Empathy, Like-mindedness, and Autism.” … [please read below the rest of the article]. (shrink)

Evaluativism about desire, the view that desires just are, or necessarily involve, positive evaluations of their objects, currently enjoys widespread popularity in many philosophical circles. This chapter argues that evaluativism, in both of its doxastic and perceptual versions, overstates and mischaracterises the connection between desires and evaluations. Whereas doxastic evaluativism implausibly rules out cases where someone has a desire, despite evaluating its object negatively, being uncertain about its value, or having no doxastic attitude whatsoever towards its evaluative status at all, (...) perceptual evaluativism cannot even properly apply to the large class of standing desires. It is also argued that evaluativism about desire is not even well-motivated in the first place: the theory is supposed to solve a particular puzzle about the role desires play in the explanation of action, yet, in fact, it does not offer any help whatsoever in dealing with the relevant puzzle. (shrink)

In quantum mechanics, the wavefunction predicts probabilities of possible measurement outcomes, but not which individual outcome is realised in each run of an experiment. This suggests that it describes an ensemble of states with different values of a hidden variable. Here, we analyse this idea with reference to currently known theorems and experiments. We argue that the ψ-ontic/epistemic distinction fails to properly identify ensemble interpretations and propose a more useful definition. We then show that all local ψ-ensemble interpretations which reproduce (...) quantum mechanics violate Statistical Independence. Theories with this property are commonly referred to as superdeterministic or retrocausal. Finally, we explain how this interpretation helps make sense of some otherwise puzzling phenomena in quantum mechanics, such as the delayed choice experiment, the Elitzur-Vaidman bomb detector, and the Extended Wigner's Friends Scenario. (shrink)

In hoping, what is important to us seems possible, which makes our life appear meaningful and motivates us to do everything within our reach to bring about the things that we hope for. I argue that it can be rational to rely on one’s hope: hope can deceive us, but it can also represent things correctly to us. I start with Philip Pettit’s view that hope is a cognitive resolve. I reject this view and suggest instead that hope is an (...) emotion: hope is a felt evaluation for which we can define a corresponding character trait which in its turn qualifies as a virtue if it is felt whenever its correctness conditions are satisfied. For religious hope in particular it follows from my analysis that, if I believe, I may hope. (shrink)

In this chapter we argue that emotions are mediated in an incomplete way in online social media because of the heavy reliance on textual messages which fosters a rationalistic bias and an inclination towards less nuanced emotional expressions. This incompleteness can happen either by obscuring emotions, showing less than the original intensity, misinterpreting emotions, or eliciting emotions without feedback and context. Online interactions and deliberations tend to contribute rather than overcome stalemates and informational bubbles, partially due to prevalence of anti-social (...) emotions. It is tempting to see emotions as being the cause of the problem of online verbal aggression and bullying. However, we argue that social media are actually designed in a predominantly rationalistic way, because of the reliance on text-based communication, thereby filtering out social emotions and leaving space for easily expressed antisocial emotions. Based on research on emotions that sees these as key ingredients to moral interaction and deliberation, as well as on research on text-based versus non-verbal communication, we propose a richer understanding of emotions, requiring different designs of online deliberation platforms. We propose that such designs should move from text-centred designs and should find ways to incorporate the complete expression of the full range of human emotions so that these can play a constructive role in online deliberations. (shrink)

Even though co‐parenthood is one of the most significant close personal relationships that people can have, there is relatively little philosophical work on the moral duties that co‐parents owe each other. This may be due to the increasingly questionable assumption, still common in our societies, that co‐parenthood arises naturally from marriage or romantic coupledom and thus that commitment to a co‐parent evolves from a commitment to a marital or romantic partner. In this article, we argue that co‐parenthood should be seen (...) as a relationship in its own right, which generates specific moral duties. Co‐parents should come to explicit agreements with each other regarding the most important areas of potential conflict between them. Such agreements may have to be renegotiated over time. We explore some possible non‐negotiable co‐parental duties such as the duties not to alienate the child from the other parent(s) and not to trap a co‐parent in a particularly vulnerable situation. We consider some legal and societal implications of our argument and, finally, suggest some pragmatic benefits of our proposal. (shrink)

The increasing use of opioid treatment agreements has prompted debate within the medical community about ethical challenges with respect to their implementation. The focus of debate is usually on the efficacy of OTAs at reducing opioid misuse, how OTAs may undermine trust between physicians and patients and the potential coercive nature of requiring patients to sign such agreements as a condition for receiving pain care. An important consideration missing from these conversations is the potential for racial bias in the current (...) way that OTAs are incorporated into clinical practice and in the amount of physician discretion that current opioid guidelines support. While the use of OTAs has become mandatory in some states for certain classes of patients, physicians are still afforded great leeway in how these OTAs are implemented in clinical practice and how their terms should be enforced. This paper uses the guidelines provided for OTA implementation by the states of Indiana and Pennsylvania as case studies in order to argue that giving physicians certain kinds of discretion may exacerbate racial health disparities. This problem cannot simply be addressed by minimising physician discretion in general, but rather by providing mechanisms to hold physicians accountable for how they treat patients on long-term opioid therapy to ensure that such treatment is equitable. There are no data in this work. (shrink)

The Austrian system for pensions and care is dated back to the monarchy and was established in the year 1848 when the future empire ensured the whole country. In the settlement with Hungary, the Hungarians got their own system, and now there is a guarantee for the wellbeing of older persons in Austria. As most of the people remember, the only introduction was after the First World War in Austria, between 1918 and 1920 the social assurance system was created by (...) persons such as Ferdinand Hanusch or members of the social-democratic party. Now the whole system has three pillars: the assurance of health; the assurance of accidents; and the assurance for older persons and care, which is covering the risks after the age of 60. It was a class-struggle when people go into a pension, but as far as we can see, the development was similar in the whole of Europe. The changes were done after the Second World War when some of the countries became communist regimes, while Austria became a flower of diversity in the systems of social assurances. There were no private assurances, those who existed were plus-payers, so the state allowed the assurance according to professions and qualifications. As we see, the results are different from the communist states of the Warsaw Pact, and this chapter focuses on explaining the social system of today and the changes of it as it is perceived. (shrink)

A myriad of sensations inform and direct us when we engage with the environment. To understand their influence on the development of our habitus it is important to focus on unifying processes in sensing. This approach allows us to include phenomena that elude a rather narrow view that focuses on each of the five discrete senses in isolation. One of the central questions addressed in this volume is whether there is something like a sensual habitus, and if there is, how (...) it can be defined. This is especially done by exploring the formation and habituation of the senses in and by a culturally shaped habitat. Two key concepts, Synaesthesia and Kinaesthetics, are addressed as essential components for an understanding of the interface of habitat and the rich and multisensory experience of a perceiving subject. At a Berlin-based conference Synaesthesia and Kinaesthetics, scholars from various disciplines gathered to discuss these issues. In bringing together the outcome of these discussions, this book gives new insights into the key phenomena of sensory integration and synaesthetic experiences, it enriches the perspectives on sensually embedded interaction and its habituation, and it expands this interdisciplinary inquiry to questions about the cultures of sensory habitus. (shrink)

Background: Several countries have recently changed their model of consent for organ donation from opt-in to opt-out. We undertook a systematic review to determine public knowledge and attitudes towards these models in Europe. Methods: Six databases were explored between 1 January 2008 and 15 December 2017. We selected empirical studies addressing either knowledge or attitudes towards the systems of consent for deceased organ donation by lay people in Europe, including students. Study selection, data extraction, and quality assessment were conducted by (...) two or more reviewers independently. Findings: Awareness of the consent model was lower in opt-out countries than in opt-in countries. A majority of the public agrees with opt-in, regardless of the law in their own country. There are ambivalent attitudes regarding the opt-out system. The public tend to prefer opt-in and mandatory choice over opt-out when several options are offered. Interpretation: The assumption that people in opt-out countries are aware of the legal requirements to be excluded from the pool of potential donors is not supported by the results of this review. This is a concern, since ignorance hinders people's autonomy regarding organ donation decision-making. Higher awareness of consent model in opt-in countries may reflect greater efforts to inform the public through campaigns to motivate donation. Legal moves towards opt-out are at odds with people's expressed preferences. Main limitations of this review are the lack of data from some countries, study population heterogeneity, and methodological shortcomings. (shrink)

Definition of the problem The umbrella term “explicability” refers to the reduction of opacity of artificial intelligence (AI) systems. These efforts are challenging for medical AI applications because higher accuracy often comes at the cost of increased opacity. This entails ethical tensions because physicians and patients desire to trace how results are produced without compromising the performance of AI systems. The centrality of explicability within the informed consent process for medical AI systems compels an ethical reflection on the trade-offs. Which (...) levels of explicability are needed to obtain informed consent when utilizing medical AI? Arguments We proceed in five steps: First, we map the terms commonly associated with explicability as described in the ethics and computer science literature, i.e., disclosure, intelligibility, interpretability, and explainability. Second, we conduct a conceptual analysis of the ethical requirements for explicability when it comes to informed consent. Third, we distinguish hurdles for explicability in terms of epistemic and explanatory opacity. Fourth, this then allows to conclude the level of explicability physicians must reach and what patients can expect. In a final step, we show how the identified levels of explicability can technically be met from the perspective of computer science. Throughout our work, we take diagnostic AI systems in radiology as an example. Conclusion We determined four levels of explicability that need to be distinguished for ethically defensible informed consent processes and showed how developers of medical AI can technically meet these requirements. (shrink)

Goal: To assess public knowledge and attitudes towards the family’s role in deceased organ donation in Europe. -/- Methods: A systematic search was conducted in CINHAL, MEDLINE, PAIS Index, Scopus, PsycINFO, and Web of Science on December 15th, 2017. Eligibility criteria were socio-empirical studies conducted in Europe from 2008 to 2017 addressing either knowledge or attitudes by the public towards the consent system, including the involvement of the family in the decision-making process, for post-mortem organ retrieval. Screening and data collection (...) were performed by two or more independent reviewers for each record. -/- Results: Of the 1482 results, 467 studies were assessed in full-text form, and 33 were included in this synthesis. When the deceased has not expressed any preference, a majority of the public support the family's role as a surrogate decision-maker. When the deceased expressly consented, the respondents' answers depend on whether they see themselves as potential donors or as a deceased's next-of-kin. Answers also depend on the relationship between the deceased and the decision-maker(s) within the family, and on their ethnic or cultural background. -/- Conclusions: Public views on the authority of the family in organ donation decision-making require further research. A common conceptual framework and validated well-designed questionnaires are needed for future studies. The findings should be considered in the development of Government policy and guidance regarding the role of families in deceased organ donation. (shrink)

Moral (or ethical) sensitivity is widely viewed as a foundational learning goal in engineering ethics education. We have argued in this paper is that this view of moral sensitivity cannot be readily transported from the nursing context to the engineering context on the basis of a care-analogy. The particularized care characteristic of the nursing context is decisively different from the generalized and universalized forms of care characteristic of the engineering context. Through a focus on care and maintenance, the engineering student’s (...) moral sensitivity can be refined, opening up a perceptual awakening and affectivity towards the complex nature of the engineer’s Other. This awakening is in part promoted through an understanding of the ideology of neutrality as a moment in the history engineering. Becoming aware of this ideology as an ideology can then be seen as an activity of dividing loyalties that allows for a reflexive and critical view of the biases and presuppositions inherited within the world of engineering. This process of deepening the engineering student’s moral sensitivity is perhaps as much a process of the student becoming aware of her professional world, how it shapes her understanding of herself, and what it means to be a good engineer. (shrink)

It is often suggested that social media is a hostile environment for critical thinking and that a major source for epistemic problems concerning social media is that it facilitates emotions. We argue that emotions per se are not the source of the epistemic problems concerning social media. We propose that instead of focusing on emotions, we should focus on the affective scaffolding of social media. We will show that some affective scaffolds enable desirable epistemic practices, while others obstruct beneficial epistemic (...) practices, or enable hostile epistemic practices. Particularly, we will show that emotions play a crucial role in the epistemic practice of critical thinking and that the affective scaffolding of social media can support, or hinder, online critical thinking. The upshot of our argument is that affective scaffoldings of social media can harness emotions to support beneficial epistemic practices, like online critical thinking. (shrink)

Background Consent policies for post-mortem organ procurement (OP) vary throughout Europe, and yet no studies have empirically evaluated the ethical implications of contrasting consent models. To fill this gap, we introduce a novel indicator of governance quality based on the ideal of informed support, and examine national differences on this measure through a quantitative survey of OP policy informedness and preferences in seven European countries. -/- Methods Between 2017–2019, we conducted a convenience sample survey of students (n = 2006) in (...) Austria (AT), Belgium (BE), Denmark (DK), Germany (DE), Greece (GR), Slovenia (SI) and Spain (ES), asking participants about their donation preferences, as well as their beliefs and views about the policy in place. From these measures, we computed indices of informedness, policy support, and fulfilment of unexpressed preferences, which we compared across countries and consent systems. -/- Results Our study introduces a tool for analyzing policy governance in the context of OP. Wide variation in policy awareness was observed: Most respondents in DK, DE, AT and BE correctly identified the policy in place, while those in SI, GR and ES did not. Respondents in opt-out countries (AT, BE, ES and GR) tended to support the policy in place (with one exception, i.e., SI), whereas those in opt-in countries (DE and DK) overwhelmingly opposed it. These results reveal stark differences in governance quality across countries and consent policies: We found a preponderance of informed opposition in opt-in countries and a general tendency towards support–either informed or uninformed–in opt-out countries. We also found informed divergence in opt-in countries and a tendency for convergence–either informed or uninformed–among opt-out countries. -/- Conclusion Our study offers a novel tool for analyzing governance quality and illustrates, in the context of OP, how the strengths and weaknesses of different policy implementations can be estimated and compared using quantitative survey data. (shrink)

Sabine Hohl and Dominic Roser argue that states that emit their fair share of greenhouse gases have a duty to step in for states that emit more than their fair share. In this comment I ask two questions: First, given that Hohl and Roser are right, how relevant is the duty to step in for the polluters in practice? Second, is there such a duty on more non-ideal approaches than the one taken by Hohl and Roser as well? I (...) argue that the duty to step in for the polluters is not very relevant (because of considerations of demandingness and fairness) and that on more extremely non-ideal approaches there may be only a limited duty to take up the slack, or no such duty at all (because the duty must be weighed against other duties, and because states are poorly motivated to act in conformity with it). (shrink)

Intercultural Approaches between Europe and China via Art? -/- Two landscapes from different cultures, Europe and China, that are both considered masterpieces are the focus of a study by Martina Sauer. To what extent are they each perceived as beautiful? Can the differences in aesthetic understanding tell us something about the respective cultures? Do the results have the potential to contribute to intercultural rapprochement between Europe and China? The possibility that these ideas can be fruitful for intercultural connections and understanding, (...) and for a re-evaluation of the interaction between humans and nature, is considered and analysed using the tools and theory of vitality semiotics (VS). -/- The task is examined by taking up premises from the philosophy of emotions by Sabine A. Döring, from the art history by Heinrich Wölfflin, from the infant research by Daniel N. Stern and from the empirical research in neuroscience on vitality forms by the research group around Giacomo Rizzolatti. -/- Cf. Martina Sauer, Vitality Semiotics: The Ever Beautiful and Its Potential for an Intercultural Approach: In Atmospheric Design and Everyday Aesthetics, edited by David Brubaker & Zhuofei Wang [Contemporary Aesthetics, Special Volume 12, 2024]: 1-11. (shrink)

These comments on Sabine Grebe, "The Transformation of the Husband/Wife Relationship during Exile: Letters from Cicero and Ovid" raise questions about the similarities and dissimilarities of marriage and friendship examined in the marriages of Cicero and Ovid.

Sabine Hossenfelder’s recent book “Lost in Math” has attracted numerous responses, including by notable physicists such as Frank Wilczek. In this article we focus on Wilczek’s remark on that book, in particular on the perils of postempirical science. We also discuss shortly multiverse hypothesis from philosophical perspective. In last section, we offer a resolution from the perspective of Neutrosophic Logic on this problem of classical tension between mathematics and experience approach to physics, which seems to cause the stagnation of (...) modern physics. (shrink)

The question of what exactly is irrational about recalcitrant emotions—those that occur in tension or conflict with our beliefs—has been widely debated. Sabine Döring claims that such irrationality only emerges if we act on our recalcitrant emotion or engage in emotion-relevant reasoning in light of it. I here provide an account that acts as an extension to the latter part of this claim by considering in more depth the question of what is irrational about that reasoning, i.e., emotionally recalcitrant (...) reasoning. In doing so, I offer a somewhat alternative explanation to Döring's as to the form of irrationality involved. Where Döring argues that emotionally recalcitrant reasoning involves epistemic irrationality by way of conflicting judgments that are involved, I argue that our engagement in this reasoning is, in fact, practically irrational. This is because, I claim, it involves us “accepting”—treating as true—propositions that we do not believe to be true, in the absence of the kind of reasons that would usually rationalize doing so. Doing so constitutes a form of practical, rather than epistemic, irrationality. This is a conclusion I arrive at through a consideration of the nature of the reasoning our emotions in general tend to motivate. (shrink)

Thomas Pogge and Andrew Kuper suggest that we should promote an ‘institutional’ solution to global poverty. They advocate the institutional solution because they think that non-governmental organizations (NGOs) can never be the primary agents of justice in the long run. They provide several standard criticisms of NGO aid in support of this claim. However, there is a more serious problem for institutional solutions: how to generate enough goodwill among rich nation-states that they would be willing to commit themselves to supranational (...) institutional reforms. In the current international political climate, the implementation of such institutional reforms introduces several intractable problems, including difficulties of global coordination and enforcement. I defend the solution of NGO aid from the criticisms presented by Pogge and Kuper, and propose how it might be reformed. My main suggestion is that all practising NGOs should be required to be ‘accountable for reasonableness’ in the sense that Norman Daniels and James Sabin have outlined. (shrink)

: Decisions about funding health services are crucial to controlling costs in health care insurance plans, yet they encounter serious challenges from intellectual property protection—e.g., patents—of health care services. Using Myriad Genetics' commercial genetic susceptibility test for hereditary breast cancer (BRCA testing) in the context of the Canadian health insurance system as a case study, this paper applies concepts from social contract theory to help develop more just and rational approaches to health care decision making. Specifically, Daniels's and Sabin's "accountability (...) for reasonableness" is compared to broader notions of public consultation, demonstrating that expert assessments in specific decisions must be transparent and accountable and supplemented by public consultation. (shrink)

Criticism and Creative Compensation: Andreas Schönberger, Immanuel Kant et al. In: Sabine Coelsch-Foisner (2023) Kreativität, schöpferischer Wille und (Über)Lebensstrategie. Winter, Heidelberg. -/- Creativity as a survival strategy requires the creative will to succeed in an academic environment. In addition to previous education, originality and the quality of one's own preliminary work, conviction of one's own abilities and flexibility in the choice of topics, activities and places are important prerequisites for success. The spirit of optimism in the age of the (...) Enlightenment and the stormy rise of idealism, the possi- bility of documenting academic achievements and partly self-awarded qualifica- tions in self-financed printed works, and the administrative gaps in the system were enough to annoy Immanuel Kant – at least briefly. (shrink)

This book is inspired by a German theoretical physicist, Sabine Hossenfelder’s publication: “Lost in Mathematics”. Her book seems to question highly mathematical and a lot of abstraction in the development of physics and cosmology studies nowadays. There is clear tendency that in recent decades, the physics science has been predominated by such an advanced mathematics, which at times sounding more like acrobatics approach to a reality. Through books by senior mathematical-physicists like Unzicker and Peter Woit, we know that the (...) answer of TOE is not in superstring theories or other variations of such 26 dimensional bosonic string theory, of which none of those theories survived experimental test, but perhaps in low dimensional physics. As Alexander Unzicker suggests, perhaps it is more advisable to consider rotation in 3D space (known as SO3), or a kind of superfluid vortices version of gravitation theory. We can also reconsider proposition by the late Prof F. Winterberg (formerly professor at Univ. Nevada, Reno), that it is most likely that superfluid phonon roton theory in 3D can replace the entire superstring theories. While we don’t explore yet implications of his model to particle physics, we discuss here some published papers at several journals in the past few years. (shrink)

The task of the congress of the German Society for Semiotics in Passau / Germany in September 2017 was to explore and describe "boundaries". A total of 12 sections of the society wrote a call for paper for this purpose. With the present anthology it has to be made evident, how concretely also the boundaries of the own, the other and the foreign can be negotiated via pictures. -/- Papers: -/- - Martina Sauer: Ikonische Grenzverläufe. Szenarien des Eigenen, Anderen und (...) Fremden im Bild. Eine Einführung, 4 - Barbara Margarethe Eggert: Das andere Geschlecht im Altarraum – exklusive Textilien als inklusive Medien. Studien zum Gösser Ornat, 7 - Birke Sturm: Politik der Schönheit: Zur Konstruktion einer ›wissenschaftlichen‹ Bildästhetik schöner weiblicher Körper um 1900 am Beispiel des Gynäkologen Carl Heinrich Stratz, 22 - Melis Avkiran: Das rassifizierte Fremde im Bild. Zur Genese differenzbildender Konzepte in der Kunst des 15. Jahrhunderts am Beispiel des Malers Hans Memling, 40 - Leonie Licht: weiß zwischen schwarz zwischen weiß – Geschichten von Identität im Bild, 75 - Julia Austermann: Queere Interventionen im kommunistischen Polen – Krzysztof Jung und sein ›plastisches Theater‹, 91 - Sabine Engel: Tizians Porträt der Laura Dianti. Aneignung und Transformation zwischen Orient und Okzident, 111 - Anna Christina Schütz: Osman Hamdi Beys Türkische Straßenszene. Der Teppich als Verhandlungsort kultureller Identitäten im ausgehenden 19. Jahrhundert, 146 - Benjamin Häger, Claudia Jürgens: Ikonische Stadtstrategien. Das Fassadenplakat und die Musterfassade als Instrumente machtpolitischer Repräsentation, 175 - Irene Schütze: Fehlende Verweise, rudimentäre ›Markierungen‹: aufgeweichte Grenzverläufe zwischen Kunst und Alltag, 204 - Stefan Römer: Interesse an und in einem Bildarchiv für Migrant/innen und Flüchtlinge, 221 - Viola Nordsieck: Von der Fähigkeit, einen Stuhl zu ignorieren. A. N. Whiteheads Konzept der Wahrnehmung als symbolisierender Tätigkeit und die Art, wie wir Bilder als Bilder sehen, 239 - David Jöckel: Mythos und Bild. Roland Barthes’ Semiologie bildlicher Stereotypisierung, 255 -/- - Kurzbiographien der Autorinnen und Autoren, 274 - Impressum, 278. (shrink)

Abstract in English, German, French and Croatian -/- In the paper “The ‘Bubbling Up’ of Subterranean Politics in Europe”, which was published in 2013 in the Journal of Civil Society, Mary Kaldor and Sabine Selchow attempted to reveal the specific qualities of the uprisings which emerged after the year 2010 in some European countries, such as Germany, Spain, Italy, England etc. According to the authors, the mode of organization which forms the main body of these emancipatory movements obtains its (...) basic logic from the world of the Internet. The use of the Internet requires a re-evaluation of negative philosophical commentary regarding technology. In the context of twentieth-century philosophy, Martin Heidegger and Herbert Marcuse are the most influential philosophers who studied the negative aspects of technology. Heidegger portrayed the destructive effects of scientific reasoning and technology on the Western culture through the criticism of the traditional Western metaphysics on a phenomenological-ontological level. Marcuse, belonging to the tradition of Western Marxism, formed his critique of technology in the context of the concept of instrumental rationality and the critique of advanced industrial society and capitalism. Although the starting points of their perspectives on technology and the underlying purposes of their critiques of technology were different, it may be asserted that both have a rather negative and almost entirely pessimistic disposition towards technology. Heidegger’s and Marcuse’s criticisms of technology will be discussed in this context and the differences and similarities between these criticisms will be shown. Finally, the paper will emphasise the question of the possibility of a positive role of technology. Technology can serve as an alternative to negative uses by shedding light on the relation between the current uprisings and the Internet. Keywords technology, rationality, freedom, enframing, criticism, revolt movements, Internet, politics //////////////////////////////////////////////////////////////////////////////////////////////////// /////// Ist die Emanzipation des Menschen durch Technologie möglich? Zusammenfassung In dem Artikel „The ‘Bubbling Up’ of Subterranean Politics in Europe”, veröffentlicht im Jahre 2013 im Journal of Civil Society, versuchten Mary Kaldor und Sabine Selchow die spezifischen Qualitäten der Aufstände zum Ausdruck zu bringen, die nach 2010 in den europäischen Ländern ausbrachen – Deutschland, Spanien, Italien, England usw. Nach Ansicht der Autoren erhält der Modus der Organisation, der den Hauptkörper dieser emanzipatorischen Bewegungen bildet, seine grundlegende Logik aus der Welt des Internets. Die Analogie mit dem Internet erfor- dert eine Neubewertung der negativen Kommentare über die Technologie aus philosophischer Perspektive. Martin Heidegger und Herbert Marcuse sind die einflussreichsten Philosophen, die sich mit den negativen Aspekten der Technologie in der Philosophie des 20. Jahrhunderts befasst haben. Heidegger schilderte die zerstörerischen Auswirkungen der wissenschaftlichen Vernunft und Technologie auf die westliche Kultur durch die Kritik an der traditionellen abend- ländischen Metaphysik auf der phänomenologisch-ontologischen Ebene, während Marcuse, ein Mitglied des westlichen Marxismus, seine Kritik an der Technologie im Rahmen des Konzepts der instrumentellen Rationalität und der Kritik der fortgeschrittenen Industriegesellschaft und Kapitalismus geformt hat. Obgleich die Ansatzpunkte ihrer Perspektiven über die Technologie und die zugrunde liegenden Zwecke ihrer Kritik an der Technologie unterschiedlich waren, kann behauptet werden, dass beide eine eher negative und fast völlig pessimistische Einstellung zur Technologie hatten. In diesem Zusammenhang werden Heideggers und Marcuses Kritiken an der Technologie diskutiert sowie Unterschiede und Ähnlichkeiten zwischen den beiden Kri- tiken aufgezeigt. Abschließend unterstreicht das Paper die Frage nach der Möglichkeit einer positiven Rolle für die Technologie, die als Alternative zur negativen Perspektive dienen kann, indem sie Licht in das Verhältnis zwischen aktuellen Aufständen und Internet bringt. Schlüsselwörter Technologie, Rationalität, Freiheit, Gestell, Kritik, Revoltebewegungen, Internet, Politik //////////////////////////////////////////////////////////////////////////////////////////////////// /////// L’émancipation humaine est-elle possible à travers la technologie ? Résumé Dans l’article « The “Bubbling Up” of Suberranean Politics in Europe » publié en 2013 dans Journal of Civil Society, Mary Kaldor et Sabine Selchow tentent de mettre en lumière les caractéristiques spécifiques des révoltes qui ont fait jour après 2010 dans certains pays européens – Allemagne, Espagne, Italie, Angleterre, etc. Selon nos auteures, le mode d’organisation qui a formé le corps essentiel de ces mouvements émancipatoires tire sa logique de base du monde de l’internet. Cette analogie avec l’internet requiert une réévaluation, à partir d’un point de vue philosophique, des commentaires négatifs sur la technologie. Martin Heidegger et Herbert Marcuse sont les philosophes les plus influents ayant travaillé sur les aspects négatifs de la technologie au sein de la philosophie du XXe siècle. Heidegger a dépeint les effets destructeurs de la raison scientifique et de la technologie de notre culture occidentale à travers son criticisme de la métaphysique traditionnelle occidentale à un niveau phénoménologico-ontologique, tandis que Marcuse, membre du « communisme occidentale », a formé une critique de la technologie au sein du concept de rationalité instrumentale et une critique de la société industrielle avancée et du capitalisme. Bien que le point de départ de leur perspective sur la technologie et que le but sous-jacent de leur critique diffèrent, il est possible d’affirmer que leur point commun est d’avoir posé un regard négatif et presque entièrement pessimiste sur la technologie. À cet égard, le criticisme d’Heidegger et de Marcuse vont être abordés afin d’en soulever les différences et les similarités. Enfin, cet article mettra l’accent sur la possibilité d’un rôle positif de la technologie qui pourrait servir d’alternative aux perspectives négatives en faisant la lumière sur le lien entre les révoltes actuelles et l’internet. Mots-clés technologie, rationalité, liberté, mettre en forme, criticisme, mouvements de révolte, internet, politique //////////////////////////////////////////////////////////////////////////////////////////////////// /////// Je li moguća ljudska emancipacija kroz tehniku? Sažetak U članku »The ‘Bubbling Up’ of Subterranean Politics in Europe«, objavljenom 2013. u časopisu Journal of Civil Society, Mary Kaldor i Sabine Selchow pokušale su otkriti specifične značajke pobuna koje su se javila nakon 2010. godine u europskim zemljama poput Njemačke, Španjolske, Italije, Engleske itd. Prema autoricama, način organiziranja koji čini glavno tijelo ovih emancipatornih pokreta preuzima svoju osnovnu logiku iz svijeta Interneta. Analogija s Internetom zahtijeva ponovnu evaluaciju negativnih komentara o tehnici iz filozofske perspektive. Martin Heidegger i Herbert Marcuse najutjecajniji su filozofi 20. stoljeća koji su se bavili negativnim aspektima tehnike. Heidegger je prikazao destruktivne učinke znanstvene racionalnosti i tehnike na zapadnu kulturu kroz kritiku tradicionalne zapadne metafizike na fenomenološko-ontološkoj razini, dok je Marcuse, kao predstavnik zapadnoga marksizma, oblikovao svoju kritiku tehnike u kontekstu pojma instrumentalne racionalnosti te kritike razvijenog industrijskog društva i kapitalizma. Iako su polazišne točke njihovih pogleda na tehniku, kao i osnovne svrhe kritike tehnike, različite, može se reći da obojica imaju poprilično negativno i gotovo u potpunosti pesimističko shvaćanje tehnologije. U tom će se kontekstu razmotriti Heideggerova i Marcuseova kritika tehnike kao i razlike i sličnosti između tih dvaju pristupa. Zaključno će rad naglasiti mogućnost pozitivne uloge tehnike, koja može služiti kao alternativa negativnoj perspektivi osvjetljavajući odnos između nedavnih pobuna i interneta. Ključne riječi tehnologija, racionalnost, sloboda, postav, kritika, pobunjenički pokreti, Internet, politika. (shrink)

TRANSPORTE DE GAMETAS, FERTILIZAÇÃO E SEGMENTAÇÃO -/- • _____OBJETIVO -/- O entendimento do desenvolvimento embrionário nos estágios iniciais, desde a deposição dos espermatozoides na fêmea, passando pela fertilização deste no ovócito e na formação do zigoto, é de suma importância para diferenciar especialistas em reprodução e manejo reprodutivo no mercado de trabalho e, também, durante a vida acadêmica. Compreender os processos que levam à formação do zigoto na fêmea é essencial para avaliar a capacidade reprodutiva dos animais e, mediante técnicas, (...) avaliar o trato reprodutivo da fêmea e o desenvolvimento do embrião até a formação do feto e, por fim, em um novo animal sadio na propriedade. Com esse trabalho, o estudante de veterinária ou zootecnia, que deseja se aprofundar na fisiologia da reprodução animal, identificará os mecanismos que são envolvidos no transporte dos gametas, bem como os processos que estes últimos devem completar para alcançar a fertilização e para desencadear as divisões iniciais do embrião. -/- • _____INTRODUÇÃO -/- A fertilização ou fecundação é o processo pelo qual os gametas masculino (espermatozoide) e feminino (ovócito) se fundem para gerar um novo indivíduo. Seu êxito depende da culminação adequada dos diferentes processos que devem sofrer os gametas durante sua maduração e percurso; do transporte oportuno destes no trato reprodutivo da fêmea, assim como de uma série de adaptações dos órgãos genitais internos da mãe. A segmentação refere-se às primeiras divisões celulares do embrião. -/- • _____TRANSPORTE DO OVÓCITO -/- O ovócito que é liberado na ovulação, e que se encontra coberto pelas células do cumulus (figura 1), é capturado pela fímbria do infundíbulo ao aderir aos cílios. Esse processo é altamente eficaz, inclusive em espécies onde os ovários possuem várias formações globosas, por exemplo nas porcas, onde os ovidutos capturam entre 95 e 100% dos ovócitos que são ovulados. As contrações das camadas musculares do oviduto e o movimento intenso dos cílios da mucosa faz com que as secreções fluam em direção ao útero, transportando assim o complexo cumulus-ovócito. Esse transporte é relativamente rápido até alcançar a junção da ampola com o istmo (que é considerado o local de fertilização do espermatozoide e ovócito) a partir do qual se torna lento. Devido a fêmea estar em estro, o processo está sob controle endócrino, isto é, controle hormonal através do estradiol. Nas fêmeas domésticas, ao contrário das mulheres, o transporte ao longo do oviduto é extremamente eficiente, pois os embriões passam para o útero sem dificuldade, de modo que gestações ectópicas (tubárias ou em cavidade) são quase inexistentes. A égua, frequentemente, retém por muito tempo os ovócitos não fertilizados no oviduto, provavelmente devido a não secreção de substâncias (como a prostaglandina E) que poderiam favorecer sua passagem, como se propõe que aconteça com os embriões. A figura 2 apresenta um ovócito com suas respectivas estruturas. Figura 1: ovócitos de uma vaca madurados in vitro. Nota-se as células do cumulus que os recobre. -/- Figura 2: estruturas do ovócito de uma ovelha que se encontra na etapa de ovócito secundário, depois da ovulação. Elaborado pelo autor. • _____TRANSPORTE ESPERMÁTICO -/- Para que os espermatozoides sejam capazes de fertilizar o ovócito, deverão sofrer uma série de mudanças bioquímicas e morfológicas ao longo de sua passagem pelo aparelho reprodutor tanto masculino como feminino. Uma vez produzidos na parede do túbulo seminífero, os espermatozoides são liberados em direção ao lúmen tubular e transportados passivamente para uma estrutura ramificada conhecida como rede testicular (rete testis). Dessa rede são conduzidos em direção ao epidídimo passando através de 10 a 20 ductos eferentes localizados no polo superior do testículo. O epidídimo é dividido em três seções denominadas cabeça, corpo e cauda; é constituído por um só ducto longo e tortuoso que continua com o canal deferente. Ao final desemboca nas ampolas seminais, no ducto ejaculatório e na uretra. As funções do epidídimo são as de maduração, transporte e armazenamento dos espermatozoides. O transporte através do epidídimo é lento, aproximadamente de 10 dias em touros, e segue sendo passivo. Os espermatozoides tomados da cabeça do epidídimo são ainda imaturos e incapazes de fertilizar, enquanto os armazenados na cauda são completamente maduros. Durante o trânsito pelo epidídimo os espermatozoides adquirem motilidade e o potencial para fertilizar, o acrossomo é remodelado e a gota citoplasmática migra para o flagelo e é liberada. Quando um macho ejacula com muita frequência, é possível observar espermatozoides com gota citoplasmática no sêmen, já que não há tempo suficiente para que completem sua maduração. Os espermatozoides são expulsados fora do organismo durante a cópula, na masturbação ou em emissões espontâneas. Na ejaculação, os espermatozoides que se encontram suspensos nos fluidos do testículo e do epidídimo, misturam-se ao chegar na uretra com as secreções das glândulas acessórias para formar o sêmen. Essas secreções denominadas plasma seminal, proporcionam substâncias para manter o metabolismo energético das células espermáticas, e integram suas membranas elementos que impedem uma capacitação prematura. Durante a cópula, o sêmen é depositado na vagina ou no útero, variando entre as espécies (tabela 1). Na monta natural, geralmente, o serviço ocorre no momento propício, já que está definido pela fase do ciclo estral em que a fêmea é receptiva ao macho. No entanto, na inseminação artificial, é o macho que deverá determinar o momento ideal, e para isso é importante considerar a vida média dos gametas, ao qual é muito curta no caso dos ovócitos (tabela 1). -/- Tabela 1: local de depósito do sêmen, volume da ejaculação e vida média dos gametas. Espécie Local de deposição Volume (ml) Velocidade de ejaculação Vida média do ovócito Vida média do espermatozoide Bovinos Intravaginal 2 1 – 3 seg 8 h 30 – 48 h Caninos Intravaginal 2 – 30 (10 média) 6 – 45 min 48 – 72 h 9 – 11 d Equinos Intrauterina 50 – 200 20 – 60 seg 6 – 8 h 72 – 120 h Humanos Intravaginal 3 - - 5 – 6 d Ovinos Intravaginal 1 1 – 2 seg 16 – 24 h 30 – 48 h Suínos Intrauterina 200 – 400 5 – 20 min 8 – 10 h 24 – 48 h Onde d = dias; h = horas. A vida fértil do ovócito é muito curta, portanto, o momento do serviço é de grande importância para obter altos índices de fertilização. -/- Independentemente do local em que os espermatozoides sejam depositados no aparelho reprodutor feminino, serão expostos às secreções genitais e sofrem uma série de mudanças em seu trajeto até o local de fertilização antes de penetrar no ovócito. Nas espécies em que o sêmen é depositado na parte cranial da vagina, uma parte do mesmo penetra através da cérvix, enquanto outra parte é eliminada do aparelho genital da fêmea, em pouco tempo, através do fluxo retrógrado. O meio vaginal não é adequado e imobiliza os espermatozoides em pouco tempo, pelo qual deverão entrar no útero onde o ambiente é mais propício. O transporte espermático na fêmea é o resultado da alta contratilidade, do movimento ciliar e o fluido do aparelho genital durante o estro, ao qual está sob controle endócrino e do sistema nervoso. Esse transporte é favorecido pelas características especiais do muco estral, cujas moléculas formam uma espécie de canais que facilitam a passagem dos espermatozoides. Pelo contrário, durante a fase lútea seu transporte é dificultado. Além do meio vaginal, a cérvix também atua como barreira natural para limitar a passagem dos espermatozoides, diminuindo assim a possibilidade de polispermia. Funciona, também, como um filtro que seleciona os espermatozoides aptos dos que não o são, uma vez que somente os primeiros possuem uma motilidade vigorosa que lhes permite passar pelo muco altamente hidratado. Na vaca a cérvix é considerada como um reservatório espermático. Quando atravessam a cérvix, os espermatozoides seguem sua deslocação tanto por movimento próprio como pelas contrações uterinas e tubárias. Nas espécies em que o local de depósito do sêmen do macho na fêmea é intrauterino, como equinos, a principal barreira que os espermatozoides enfrentam é a união ou junção útero-tubárica. A união entre o útero e o oviduto (istmo do oviduto) serve como reservatório funcional dos espermatozoides nas espécies domésticas. Poucos minutos depois da cópula, é possível encontrar alguns espermatozoides no oviduto, que é conhecido como fase de transporte rápido. No entanto, esses espermato-zoides não são os que participam do processo de fertilização e podem apresentar certas anormalidades. Existe um segundo tipo de transporte denominado fase sustentada, a qual consiste na migração prolongada dos espermatozoides em direção as partes mais craniais do aparelho genital feminino, que conduzem à colonização do reservatório funcional e na liberação gradual dos espermatozoides dos reservatórios espermáticos, incluindo este último. O reservatório do istmo fornece aos espermatozoides um ambiente propício, protegendo-os contra a fagocitose, prolongando assim a sua viabilidade. Aqui os esper-matozoides permanecem aderidos a superfície das células ciliadas do epitélio até a finalização de sua capacitação, depois da qual são liberados quando alteram seu padrão de motilidade flagelada, fenômeno conhecido como hipermotilidade, e migram em ondas em direção ao local da fertilização. Dos milhões de espermatozoides ejaculados, somente alguns milhares alcançarão o istmo do oviduto e um número sumamente pequeno será encontrado nas imediações do ovócito no momento da fertilização. -/- • _____CAPACITAÇÃO ESPERMÁTICA E REAÇÃO ACROSSÔMICA -/- A capacitação é um processo gradual e essencial para a fertilização. Os espermato-zoides devem passar por um dado tempo de “incubação” no aparelho genital da fêmea e sofrer uma série de mudanças antes de serem capazes de fecundar o ovócito. A capacita-ção dos espermatozoides começa quando eles entram em contato com as secreções do aparelho genital da fêmea e termina no istmo do oviduto. Durante esse percurso a superfície da cabeça do espermatozoide se modifica já que algumas moléculas como o colesterol são removidas da membrana plasmática, aumentando sua fluidez e alterando suas propriedades bioquímicas. Entre outras coisas, essa reorganização dos lipídios facilita a entrada de cálcio extracelular pelos canais iônicos e ocasiona a desestabilização da membrana, tornando-a mais fusogênica. Também são eliminados outros fatores (conhecidos genericamente como fatores descapacitantes) que expõem receptores membranais indispensáveis para a realização da união entre o espermatozoide e o ovócito durante a fertilização. Os espermatozoides capacitados apresentam um padrão de hipermotilidade e uma maior atividade metabólica, características que devem obter para que sejam capazes de penetrar as camadas do ovócito. A capacitação é necessária para que ocorra a reação acrossômica. A reação acrossomal ou acrossômica (RA) é um fenômeno de exocitose que é desencadeada pela ligação entre as proteínas e receptores localizados na membrana do espermatozoide e a zona pelúcida do ovócito (figura 3). Envolve a fusão da membrana plasmática do espermatozoide com a membrana externa de seu acrossomo; formando, assim, pequenas vesículas, cujo conteúdo de enzimas hidrolíticas, como a hialuronidase e a acrosina, é liberado em direção ao seu exterior, facilitando a penetração da zona pelúcida. A adesão do espermatozoide à zona pelúcida é específica da espécie e depende de glicoproteínas presentes na membrana dos ovócitos maduros; a cabeça do espermatozoide se une com essas glicoproteínas mediante receptores específicos e atravessam em direção oblíqua a zona pelúcida até chegar ao espaço perivitelino. Nos mamíferos, particularmente em roedores e nos humanos, algumas dessas glicoproteínas são conhecidas como ZP1, ZP2 e ZP3. Pensa-se que a união da membrana espermática a esta última é o que desencadeia a reação acrossomal. Posteriormente, as vilosidades do ovócito entram em contato com o espermatozoide e a membrana presente na secreção equatorial da cabeça do espermatozoide, que tem proteínas fusogênicas específicas, une-se a membrana plasmática do ovócito, fusionando-se e permitindo a entrada do núcleo espermático ao citoplasma (figura 4). A capacitação dos espermatozoides é fundamental para o êxito da fertilização, uma vez que apenas os aptos estarão perfeitos e íntegros para que a união e percepção das glicoproteínas presentes nos mesmos possam ocorrer de forma ideal para a penetração deste no ovócito, fertilizá-lo e formar um zigoto. Figura 3: estrutura do espermatozoide. Nota: a membrana é acrossomal e não acrossonal. Elaborado pelo autor. -/- Figura 4: eventos que ocorrem durante a fertilização. A – depois de passar através das células do cumulus, o espermatozoide entra em contato com a zona pelúcida, onde receptores da membrana plasmática reconhecem as proteínas da zona pelúcida; B – é desencadeada, então, a reação acrossomal; C – para que o espermatozoide penetre na zona pelúcida; D – ao atravessar a zona pelúcida e entrar no espaço perivitelino, a cabeça do espermatozoide entra em contato com a membrana vitelina; ambas membranas se fusionam graças ao reconhecimento de proteínas fusogênicas que estão no segmento equatorial. E – ocorre, então, que o núcleo do espermatozoide penetra no citoplasma do ovócito; uma das consequências da fusão da membrana com a cabeça do espermatozoide é a reação cortical, em que os grânulos corticais do ovócito liberam seu conteúdo em direção ao espaço perivitelino, o que resulta na alteração da estrutura da zona pelúcida e da membrana vitelina para bloquear a polispermia. Elaborado pelo autor. • _____CONSEQUÊNCIAS DA PENETRAÇÃO -/- Bloqueio da polispermia -/- A fusão das membranas dos gametas durante a penetração permite a entrada da fosfolipase C zeta (PLCζ) – fator solúvel que provém do espermatozoide – que desencadeia liberação e oscilações de Ca2+ no retículo endoplasmático. Isso, por sua vez, provoca a migração e fusão dos grânulos corticais, com a consequente liberação de enzimas, que mudam tanto a estrutura da zona pelúcida (por exemplo a inativação de ZP3), como a da membrana vitelina. Desse modo, impede-se que outros espermatozoides as penetrem, evitando assim a polispermia (figura 5). -/- Figura 5: os grânulos corticais que encontram-se na periferia do citoplasma, debaixo da superfície da membrana do ovócito, migram e fusionam-se sobre a mesma, liberando seu conteúdo no espaço perivitelino imediatamente depois da penetração do espermatozoide. A – como conse-quência, tanto a membrana vitelina como a zona pelúcida são modificadas, impedindo a entrada de mais espermatozoides, o que evita a polispermia. B – o ovócito retoma, então, sua segunda divisão meiótica, que ocasiona a expulsão do segundo corpúsculo polar, e na formação dos pronúcleos feminino e masculino. C – continuando, os pronúcleos migram, suas membranas se dissolvem e os cromossomos de ambos se condensam e se unem. Completa-se, assim, a singamia e forma-se, então, o zigoto. Elaborado pelo autor baseado nos livros de embriologia e fisiologia da reprodução conforme vida bibliografia. -/- Ativação do ovócito e formação de pronúcleos -/- Na maioria das fêmeas domésticas, com exceção da cadela, o ovócito encontra-se suspenso na metáfase II da segunda meiose no momento da ovulação. A entrada da PLCζ do espermatozoide no citoplasma do ovócito, e a consequente liberação de Ca2+, faz com que o ovócito se ative, terminando a segunda divisão meiótica e expulse o segundo corpo polar. Posteriormente, o material nuclear do ovócito se reorganiza para formar o pronú-cleo feminino. Entretanto, a membrana nuclear do espermatozoide se dissolve, a cromatina descondensa-se, as protaminas são substituídas por histonas, e se forma uma nova membrana nuclear, dando lugar ao pronúcleo masculino. -/- Singamia -/- Uma vez que os pronúcleos feminino e masculino são formados, migram para o centro do ovócito, aproximam-se, suas membranas se dispersam e os cromossomos paternos e maternos se associam, com o qual recupera a condição diploide e dá origem ao zigoto (figura 5). -/- • _____DESENVOLVIMENTO EMBRIONÁRIO -/- Poucas horas após a fertilização ocorre a primeira divisão do zigoto em duas, depois em 4, 8, 16 e 32 células, denominadas blastômeros. Essas divisões mitóticas são conhecidas como divisões de segmentação ou clivagem (figura 6), uma vez que são realizadas sem aumento do citoplasma, de modo que com cada divisão os blastômeros se tornam menores. A partir das 16 células o embrião se chama mórula, e é visto como uma massa celular compacta. A compactação deve-se a informação de proteínas de ligação entre os blastômeros. O embrião acumula líquido em seu interior, formando uma cavidade denominada blastocele. Esse processo é conhecido como blastulação; o embrião, assim, passa a ser chamado de blastocisto. Nessa etapa é possível diferenciar duas populações de células embrionárias: a massa celular interna, embrioblasto ou botão embrionário (que dará origem ao embrião), e a massa celular externa, células superficiais ou trofoblasto, do qual se originam a maioria das membranas fetais. Ao continuar a multiplicação das células e a acumulação de líquido, o blastocisto aumenta de tamanho, convertendo-se em blastocisto expandido. A zona pelúcida torna-se mais fina e, finalmente, o embrião eclode; isto é, o embrião é liberado da zona pelúcida. -/- • _____FERTILIZAÇÕES ATÍPICAS -/- Polispermia -/- É a penetração de dois ou mais espermatozoides no óvulo. Esta condição é letal nos mamíferos, já que o número cromossômico desse zigoto é maior que 2n, o envelheci-mento do ovócito da porca, como consequência do serviço tardio, favorece a apresentação da polispermia, por isso, é comum ver números de nascimentos de média de 10 a 12 leitões por parição nessa espécie. Nas aves, no entanto, a penetração de mais de um espermatozoide é normal, embora apenas um pronúcleo masculino se formará, fundindo-se com o feminino. -/- Figura 6: etapas do processo de segmentação/clivagem. Fonte: aula de reprodução da professora Domenica Palomaris, UFT. -/- Ginogênese -/- É o desenvolvimento de um embrião a partir de um óvulo normal fecundado por um espermatozoide, mas sem a fusão dos cromossomos masculinos com os da fêmea. A função do espermatozoide, nesse caso, é a de ativação do ovócito para que este inicie seu desenvolvimento, mas não há fusão com o núcleo do espermatozoide. Ocorre em plantas, em nematódeos e em algumas espécies de peixes, por exemplo a Poecilia formosa, espécie em que os ovócitos das fêmeas são ativados por machos de outra espécie relacio-nada. -/- Partenogênese -/- Consiste no desenvolvimento do embrião sem a participação do espermatozoide. Ocorre em alguns insetos, o zangão, por exemplo, é partenogenético. Também pode apresentar-se em perus, cujos embriões são machos e, geralmente, morrem antes da eclosão. -/- • _____GÊMEOS -/- Existem dois tipos de gêmeos: idênticos ou monozigóticos e os não idênticos ou dizigóticos. -/- Idênticos ou monozigóticos -/- Originam-se do mesmo zigoto, sendo assim, possuem o mesmo genótipo e um fenótipo similar e, portanto, são do mesmo sexo. Em laboratório é possível gerá-los ao seccionar uma mórula em duas ou mais partes, por meio de um micromanipulador. Uma vez que possuem o mesmo genótipo, os produtos resultantes são clones. -/- Não idênticos ou dizigóticos -/- Provêm da fertilização de dois óvulos distintos por espermatozoides diferentes. Possuem, portanto, genótipos e fenótipos diferentes, e podem ser de sexo diferente. -/- REFERÊNCIAS BIBLIOGRÁFICAS -/- ALBERTS, Bruce et al. Biologia molecular da célula. Artmed Editora, 2010. AUSTIN, Colin Russell; SHORT, Roger Valentine. Reproduction in Mammals, Book I: Germ Cells and Fertilization. 1982. BEARDEN, Henry Joe et al. Reproducción animal aplicada. México: Manual Moderno, 1982. BOSCH, P.; WRIGHT JR, R. W. The oviductal sperm reservoir in domestic mammals. Archivos de medicina veterinaria, v. 37, n. 2, p. 95-105, 2005. CAPALLEJAS, Roberto Brito; RODRÍGUEZ, Lourdes Tagle. Fisiología de la reproducción animal: con elementos de biotecnología. Editorial Félix Varela, 2010. CROXATTO, Horacio B. Physiology of gamete and embryo transport through the fallopian tube. Reproductive biomedicine online, v. 4, n. 2, p. 160-169, 2002. CUPPS, Perry T. (Ed.). Reproduction in domestic animals. Elsevier, 1991. DIEDRICH, Smidt et al. Endocrinología y Fisiología de la Reproducción de los Animales Zootécnicos. 1972. DUKES, Henry Hugh; SWENSON, Melvin J.; REECE, William O. Dukes fisiologia dos animais domésticos. Editora Guanabara Koogan, 1996. FERREIRA, A. de M. Reprodução da fêmea bovina: fisiologia aplicada e problemas mais comuns (causas e tratamentos). Juiz de Fora: Minas Gerais–Brasil, p. 422, 2010. HAFEZ, Elsayed Saad Eldin; HAFEZ, Bahaa. Reprodução animal. São Paulo: Manole, 2004. HUNTER, Ronald Henry Fraser. The Fallopian tubes in domestic mammals: how vital is their physiological activity?. Reproduction Nutrition Development, v. 45, n. 3, p. 281-290, 2005. HUNTER, R. H. F.; RODRIGUEZ‐MARTINEZ, H. Capacitation of mammalian spermatozoa in vivo, with a specific focus on events in the Fallopian tubes. Molecular Reproduction and Development: Incorporating Gamete Research, v. 67, n. 2, p. 243-250, 2004. GALINA, Carlos; VALENCIA, Javier. Reproducción de los animales domésticos. 2006. HOPPER, Richard M. (Ed.). Bovine reproduction. John Wiley & Sons, 2014. HYTTEL, Poul; SINOWATZ, Fred; VEJLSTED, Morten. Embriologia veterinária. Elsevier Brasil, 2012. KÖLLE, Sabine; REESE, Sven; KUMMER, Wolfgang. New aspects of gamete transport, fertilization, and embryonic development in the oviduct gained by means of live cell imaging. Theriogenology, v. 73, n. 6, p. 786-795, 2010. MCKINNON, Angus O. et al. (Ed.). Equine reproduction. John Wiley & Sons, 2011. OLIVERA, Martha et al. El espermatozoide, desde la eyaculación hasta la fertilización. Revista Colombiana de Ciencias Pecuarias, v. 19, n. 4, p. 426-436, 2006. PLANT, Tony M.; ZELEZNIK, Anthony J. (Ed.). Knobil and Neill's physiology of reproduction. New York: Academic Press, 2014. RODRIGUEZ-MARTINEZ, Heriberto. Role of the oviduct in sperm capacitation. Theriogenology, v. 68, p. S138-S146, 2007. SAAVEDRA LEOS, María Dolores. Estudio de la composición de los gránulos corticales y del oolema de ovocitos porcinos y bovinos madurados y fecundados in vitro. Proyecto de investigación:, 2010. SENGER, Phillip L. et al. Pathways to pregnancy and parturition. Current Conceptions, Inc, 2004. SUAREZ, Susan S. The oviductal sperm reservoir in mammals: mechanisms of formation. Biology of Reproduction, v. 58, n. 5, p. 1105-1107, 1998. VALENCIA MÉNDEZ, Javier de J. Fisiología de la reproducción porcina. 1986. -/- FIXAÇÃO DO ASSUNTO -/- 1. Defina e diferencie fertilização e segmentação. -/- 2. Disserte sobre o transporte do ovócito. Por que no istmo o transporte do ovócito se torna lento? -/- 3. Fale sobre a eficiência do transporte do gameta no trato genital da fêmea e sobre a retenção de ovócitos pela égua. -/- 4. Defina as células do cumulus e explique seu papel sobre o ovócito. -/- 5. Quais as estruturas que compõem o ovócito? Qual a função de cada uma? -/- 6. Todos os ovócitos das fêmeas domésticas são iguais? Justifique. -/- 7. Disserte sobre o papel dos hormônios e das secreções sobre o transporte do ovócito no trato genital da fêmea. -/- 8. Disserte sobre o transporte do espermatozoide. Por que há transporte rápido e lento dos espermatozoides? -/- 9. Fale sobre o local de deposição do sêmen nas espécies domésticas e como esse influen-cia na eficiência da reprodução. -/- 10. Por que a vida média do espermatozoide canino é maior que as outras espécies? -/- 11. Quais as mudanças que os espermatozoides precisam sofrer para conseguir êxito na fertilização e por quê? -/- 12. Defina fase de transporte rápido, fase sustentada e hipermotilidade. Qual a importân-cia de cada um? -/- 13. Como ocorre a reação acrossômica? -/- 14. O que é polispermia e como ocorre seu bloqueio? 15. Como ocorre a ativação do ovócito e como se formam os pronúcleos? -/- 16. O que é e qual a importância da singamia? -/- 17. Disserte sobre as divisões de segmentação e qual a importância destas para o êxito da reprodução. -/- 18. Defina e diferencia mórula e blastocisto. -/- 19. Defina e diferencie ginogênese e partenogênese. -/- 20. Qual o papel endócrino e quais hormônios e enzimas atuam sobre o transporte de gametas, sobre a fertilização e sobre a segmentação? (shrink)

In a recent opinion paper, it was argued that individuals with multiple retractions or a record of academic misconduct should not serve as editors, including as editors-in-chief, on the editorial boards of scholarly or academic journals. As a first step towards appreciating how such a policy could be applied in practice, the presence of 30 individuals listed on the Retraction Watch Leaderboard on editorial boards was screened. Six cases are highlighted to gain an appreciation of the potential reputational risks that (...) journals and publishers might incur by including individuals with a tainted academic record on editorial boards. Given the reputational, legal and other risks associated with this type of assessment and decision, more formal positioning and guidance are needed by global ethics policy-related bodies such as COPE, the ICMJE, and the CSE, even more so in journals that claim to follow these organizations’ ethical guidelines. (shrink)

What role does the wild duck play in Ibsen's famous drama? I argue that, besides mirroring the fate of the human cast members, the duck is acting as animal subject in a quasi-experiment, conducted in a private setting. Analysed from this perspective, the play allows us to discern the epistemological and ethical dimensions of the new scientific animal practice (systematic observation of animal behaviour under artificial conditions) emerging precesely at that time. Ibsen's play stages the clash between a scientific and (...) a romantic understanding of animals that still constitutes the backdrop of most contemporary debates over animals in research. Whereas the scientific understanding reduces the animal's behaviour, as well as its environment, to discrete and modifiable elements, the romantic view regards animals as being at one with (or violently disconnected from) their natural surroundings. (shrink)

This compilation of references includes all references for the knowledge-how chapters included in Bengson & Moffett's edited volume. The volume and the compilation of references may serve as a good starting point for people who are unfamiliar with the philosophical literature on knowledge-how.

I discuss two types of evidential problems with the most widely touted experiments in evolutionary psychology, those performed by Leda Cosmides and interpreted by Cosmides and John Tooby. First, and despite Cosmides and Tooby's claims to the contrary, these experiments don't fulfil the standards of evidence of evolutionary biology. Second Cosmides and Tooby claim to have performed a crucial experiment, and to have eliminated rival approaches. Though they claim that their results are consistent with their theory but contradictory to the (...) leading non-evolutionary alternative, Pragmatic Reasoning Schemas theory, I argue that this claim is unsupported. In addition, some of Cosmides and Tooby's interpretations arise from misguided and simplistic understandings of evolutionary biology. While I endorse the incorporation of evolutionary approaches into psychology, I reject the claims of Cosmides and Tooby that a modular approach is the only one supported by evolutionary biology. Lewontin's critical examinations of the applications of adaptationist thinking provide a background of evidentiary standards against which to view the currently fashionable claims of evolutionary psychology. (shrink)

In this paper, we argue that, barring a few important exceptions, the phenomenon we refer to using the expression “being moved” is a distinct type of emotion. In this paper’s first section, we motivate this hypothesis by reflecting on our linguistic use of this expression. In section two, pursuing a methodology that is both conceptual and empirical, we try to show that the phenomenon satisfies the five most commonly used criteria in philosophy and psychology for thinking that some affective episode (...) is a distinct emotion. Indeed, being moved, we claim, is the experience of a positive core value (particular object) perceived by the moved subject as standing out (formal object) in the circumstances triggering the emotion. Drawing on numerous examples, we describe the distinctively rich phenomenology characteristic of the experience as well as the far-reaching action-tendencies and functions associated with it. Having thus shown that the candidate emotion seem to satisfy the five criteria, we go on, in section three, to compare it with sadness and joy, arguing that it should not be confused with either. Finally, in section four, we illustrate the explanatory power of our account of “being moved” by showing how it can shed light on, and maybe even justify, the widespread distrust we feel towards the exhibition of ‘sentimentality’. On the whole and if we are right, we have uncovered an emotion which, though never or rarely talked about, is of great interest and no small importance. (shrink)

Growing-Block theorists hold that past and present things are real, while future things do not yet exist. This generates a puzzle: how can Growing-Block theorists explain the fact that some sentences about the future appear to be true? Briggs and Forbes develop a modal ersatzist framework, on which the concrete actual world is associated with a branching-time structure of ersatz possible worlds. They then show how this branching structure might be used to determine the truth values of future contingents. They (...) point out three different ways of interpreting the logical connectives, which give rise to three different logics of the open future: one supervaluationist, one corresponding to Lukasiewicz's strong Kleene logic, and one intuitionist. (shrink)

Discussions of whistleblowing and employee loyalty usually assume either that the concept of loyalty is irrelevant to the issue or, more commonly, that whistleblowing involves a moral choice in which the loyalty that an employee owes an employer comes to be pitted against the employee''s responsibility to serve public interest. I argue that both these views are mistaken and propose a third view which sees whistleblowing as entirely compatible with employee loyalty.

What is the primary function of consciousness in the nervous system? The answer to this question remains enigmatic, not so much because of a lack of relevant data, but because of the lack of a conceptual framework with which to interpret the data. To this end, we have developed Passive Frame Theory, an internally coherent framework that, from an action-based perspective, synthesizes empirically supported hypotheses from diverse fields of investigation. The theory proposes that the primary function of consciousness is well-circumscribed, (...) serving the 'somatic nervous system[. For this system, consciousness serves as a frame that constrains and directs skeletal muscle output, thereby yielding adaptive behavior. The mechanism by which consciousness achieves this is more counterintuitive, passive, and “low level” than the kinds of functions that theorists have previously attributed to consciousness. Passive frame theory begins to illuminate (a) what consciousness contributes to nervous function, (b) how consciousness achieves this function, and (c) the neuroanatomical substrates of conscious processes. Our untraditional, action-based perspective focuses on olfaction instead of on vision and is 'descriptive' (describing the products of nature as they evolved to be) rather than 'normative' (construing processes in terms of how they should function). Passive frame theory begins to isolate the neuroanatomical, cognitive-mechanistic, and representational (e.g., conscious contents) processes associated with consciousness. (shrink)

Frankfurt cases are supposed to provide us with counterexamples to the principle of alternative possibilities. Among the most well known responses to these cases is what John Fischer has dubbed the flicker of freedom strategy. Here we revisit a version of this strategy, which we refer to as the fine-grained response. Although a number of philosophers, including some who are otherwise unsympathetic to Frankfurt’s argument, have dismissed the fine grained response, we believe there is a good deal to be said (...) on its behalf. We argue, in particular, that reflection on certain cases involving omissions undermines the main objections to the response and also provides the groundwork for an argument in support of it. (shrink)

According to the fitting attitude (FA) analysis of value concepts, to conceive of an object as having a given value is to conceive of it as being such that a certain evaluative attitude taken towards it would be fitting. Among the challenges that this analysis has to face, two are especially pressing. The first is a psychological challenge: the FA analysis must call upon attitudes that shed light on our value concepts while not presupposing the mastery of these concepts. The (...) second challenge is normative: the FA analysis must account for the fittingness of the relevant attitudes in terms of a kind of normativity intimately related to these attitudes, but again without presupposing the mastery of the relevant value concepts. In this paper, we show that real progress is possible if we pay close attention to the nature of the attitudes recruited by the analysis. More specifically, we claim that an FA analysis that appeals to emotions conceived as evaluative attitudes — as opposed to, for instance, evaluative judgements or evaluative perceptions — has the best prospects of meeting the two challenges and of putting the FA analysis on a strong footing. (shrink)

The W-defense is among the most prominent arguments for the principle of alternative possibilities (PAP). Here I offer some considerations in support of the W-defense and respond to what I see as the most forceful objections to it to date. My response to these objections invokes the well-known flicker of freedom response to Frankfurt cases. I argue that the W-defense and the flicker response are mutually reinforcing and together yield a compelling defense of PAP.

This article investigates the relationships between forms of humor that conjure up possible worlds and real-world social critiques. The first part of the article will argue that subversive humor, which is from or on behalf of historically and continually marginalized communities, constitutes a kind of aesthetic experience that can elicit enjoyment even in adversarial audiences. The second part will be a connecting piece, arguing that subversive humor can be constructed as brief narrative thought experiments that employ the use of fictionalized (...) scenarios to facilitate an open, playful attitude, encouraging a space for collaborative interpretation. This interaction between humorist and audience is an aesthetic experience that is enjoyable in and of itself, as the feelings of mirth are intrinsically valuable. But connected to the “Ha-ha!” experience of these sorts of humorous creations is an “Aha!” or potentially revelatory experience that is a mixture of cognitive comprehension and motivated (emotional) response. The third part of the article will attempt to go beyond the consciousness-raising element with an account of how such possible worlds created in the realm of imagination through subversive humor can bleed into the real world of flesh and blood people. Finally, an example of subversive humor will be analyzed. (shrink)

Quality of will accounts of moral responsibility hold that ill will is necessary for blameworthiness. But all such accounts are false to ordinary moral practice, which licenses blame for agents who act wrongly from epistemically unreasonable ignorance even if the act is not ill willed. This should be especially concerning to Strawsonians about moral responsibility, who think the genuine conditions of blameworthiness are derived from the standards internal to our practice. In response, I provide a theory of moral blameworthiness on (...) which ill will is not necessary for blameworthiness. On the view I defend, “Rational Capacitarianism,” agents are blameworthy whenever they act wrongly from an unreasonable attitude which is attributable to them, where an attitude is attributable to an agent just in case she has the capacity to assess reasons for and against the attitude and modulate the attitude in light of these assessments. Acting from unreasonable ignorance is just a special case of acting from an unreasonable attitude. My theory contrasts both with both quality of will accounts of blameworthiness and the Capacitarian view, which specifies that agents who act wrongly from ignorance are culpable if they could and should have known better. On Capacitarianism, a variety of awareness-relevant capacities are pertinent, including memory; on my view it is only failures of rational capacities that render the agent culpable, because only failures of rational capacities are attributable to the agent. (shrink)

Wigner's quantum-mechanical classification of particle-types in terms of irreducible representations of the Poincaré group has a classical analogue, which we extend in this paper. We study the compactness properties of the resulting phase spaces at fixed energy, and show that in order for a classical massless particle to be physically sensible, its phase space must feature a classical-particle counterpart of electromagnetic gauge invariance. By examining the connection between massless and massive particles in the massless limit, we also derive a classical-particle (...) version of the Higgs mechanism. (shrink)

Rules serve many important functions in society. One such function is to codify, and make public and enforceable, a society's desired prescriptions and proscriptions. This codification means that rules come with predefined punishments administered by third parties. We argue that when we look at how third parties punish rule violations, we see that rules and their punishments often serve dual functions. They support and help to maintain cooperation as it is usually theorized, but they also facilitate the domination of marginalized (...) others. We begin by reviewing literature on rules and third-party punishment, arguing that a great deal of punishment research has neglected to consider the unique power of codified rules. We also argue that by focusing on codified rules, it becomes clear that the enforcement of such rules via third-party punishment is often used to exert control, punish retributively, and oppress outgroup members. By challenging idealized theory of rules as facilitators of social harmony, we highlight their role in satisfying personal punishment motives, and facilitating discrimination in a way that is uniquely justifiable to those who enforce them. (shrink)

In everyday life and in science we acquire evidence of evidence and based on this new evidence we often change our epistemic states. An assumption underlying such practice is that the following EEE Slogan is correct: 'evidence of evidence is evidence' (Feldman 2007, p. 208). We suggest that evidence of evidence is best understood as higher-order evidence about the epistemic state of agents. In order to model evidence of evidence we introduce a new powerful framework for modelling epistemic states, Dyadic (...) Bayesianism. Based on this framework, we then discuss characterizations of evidence of evidence and argue for one of them. Finally, we show that whether the EEE Slogan holds, depends on the specific kind of evidence of evidence. (shrink)

The social welfare functional approach to social choice theory fails to distinguish a genuine change in individual well-beings from a merely representational change due to the use of different measurement scales. A generalization of the concept of a social welfare functional is introduced that explicitly takes account of the scales that are used to measure well-beings so as to distinguish between these two kinds of changes. This generalization of the standard theoretical framework results in a more satisfactory formulation of welfarism, (...) the doctrine that social alternatives are evaluated and socially ranked solely in terms of the well-beings of the relevant individuals. This scale-dependent form of welfarism is axiomatized using this framework. The implications of this approach for characterizing classes of social welfare orderings are also considered. (shrink)

In this paper we motivate the ‘principles of trust’, chance-credence principles that are strictly stronger than the New Principle yet strictly weaker than the Principal Principle, and argue, by proving some limitative results, that the principles of trust conflict with Humean Supervenience.

The adequacy of similarity to prototype as an account of categorization in natural concepts was assessed by analyzing the monotonicity of the relation between typicality of an item in a category and the probability of a positive categorization response using data from McCloskey and Glucksberg (1978). The analysis revealed a strong underlying similarity-based threshold curve, with systematic deviations. Further data collection showed that deviations from the curve could be attributed to the effects of unfamiliarity and non-categorial associations on typicality judgments, (...) as well as differences between the perceptual appearance of an item (which tended to boost typicality) and its underlying nature (which tended to boost categorization). The results are discussed in terms of the different presuppositions and task constraints involved in rating typicality as opposed to performing a categorization. (shrink)

In this field questions arise which are certainly difficult; but as I listened last time to members of the group, I felt that the main difficulty perhaps lay in determining precisely what questions we are trying to answer. I have the conviction that if we could only say clearly what the questions are, the answers to them might not appear so elusive. So I have begun with a simple list of questions about discretion which in one form or another were, (...) as it seemed to me, expressed by the group last time. I may indeed have omitted something and inserted something useless: if so, no doubt I shall be informed of this later. The central questions then seem to me to be the following: 1. What is discretion, or what is the exercise of discretion? 2. Under what conditions and why do we in fact accept or tolerate discretion in a legal system? 3. Must we accept discretion or tolerate discretion, and if so, why? 4. What values does the use of discretion menace, and what values does it maintain or promote? 5. What can be done to maximize the beneficial operation of the use of discretion and to minimize any harm that it does? (shrink)

Some propositions are more epistemically important than others. Further, how important a proposition is is often a contingent matter—some propositions count more in some worlds than in others. Epistemic Utility Theory cannot accommodate this fact, at least not in any standard way. For EUT to be successful, legitimate measures of epistemic utility must be proper, i.e., every probability function must assign itself maximum expected utility. Once we vary the importance of propositions across worlds, however, normal measures of epistemic utility become (...) improper. I argue there isn’t any good way out for EUT. (shrink)