How might Derrida be said to greet Jean-Luc Nancy in Le Toucher? What kind of handshake does he offer? Derrida explicitly mentions the handshake at the very centre of his book, in the tangent devoted to Merleau-Ponty. A reading of this moment reveals an exemplary case of what happens when Derrida reads apparently ‘fraternal’ texts, and opens up further levels of difference. What then if we consider Nancy's response to Derrida, when the recipient of the handshake shakes (...) back? By examining Nancy's various (mis-)readings of Derrida's famous phrase ‘la différance finie est infinie’ it is possible to trace a subtle but irreducible non-reciprocity in this relationship, represented in the handshake of the ‘salut’ as greeting and valediction, beyond all safety or salvation. (shrink)

Should philosophers of science be paying attention to developments in "nanoscience"? Undoubtedly, it is too early to tell for sure. The goal of this paper is to take a preliminary look. In particular, I look at the use of computational models in the study of nano-sized solid-state materials. What I find is that there are features of these models that appear on their face to be at odds with some basic philosophical intuitions about the relationships between different theories and between (...) theories and their models. My conclusion is that developments in nanoscience are not an unlikely place for novel insights in the philosophy of science to emerge. (shrink)

This book shines bright light into the dim recesses of quantum theory, where the mysteries of entanglement, nonlocality, and wave collapse have motivated some to conjure up multiple universes, and others to adopt a "shut up and calculate" mentality. After an extensive and accessible introduction to quantum mechanics and its history, the author turns attention to his transactional model. Using a quantum handshake between normal and time-reversed waves, this model provides a clear visual picture explaining the baffling experimental results (...) that flow daily from the quantum physics laboratories of the world. To demonstrate its powerful simplicity, the transactional model is applied to a collection of counter-intuitive experiments and conceptual problems. (shrink)

This article assesses the tension between cosmopolitan and communitarian approaches to the ethics of migration by analysing how the Protestant Church in Germany (EKD) has responded to the current so-called migration crisis in Europe. I argue that the statements of the EKD frame people on the move either as migrants or as Muslims. These frames come with competing ethical consequences. Whereas migrants are presented as passive victims in need of some form of support by Christians, Muslims are presented as active (...) victimisers in need of some form of suppression by Christians. However, when the then chairman of the EKD shook hands with people on the move who were arriving at Munich station in the summer of 2015, the surplus of meaning communicated in this encounter demonstrated that these people cannot be reduced to their respective framing, thus resisting the construction of both the cosmopolitan migrant frame and the communitarian Muslim frame. Accordingly, I advocate for a re-conceptualisation of the theological ethics of migration which takes multi-faith practices, such as these handshakes, as a point of departure. (shrink)

Díaz-Rojas, Soto-Andrade and Videla-Reyes advocate an approach to the teaching and learning of mathematics that emphasizes enaction, embodiment and metaphorization. I comment on their analysis of ….

There are important structural similarities in the way that animals and humans engage in unreflective activities, including unreflective social interactions in the case of higher animals. Firstly, it is a form of unreflective embodied intelligence that is ‘motivated’ by the situation. Secondly, both humans and non-human animals are responsive to ‘affordances’ (Gibson 1979); to possibilities for action offered by an environment. Thirdly, both humans and animals are selectively responsive to one affordance rather than another. Social affordances are a subcategory of (...) affordances, namely possibilities for social interaction offered by an environment: a friend’s sad face invites comforting behavior, a person waiting for a coffee machine can afford a conversation, and an extended hand affords a handshake. I will review recent insights in the nature of the bodily intentionality characteristic of unreflective action. Such ‘motor intentionality’ can be characterized as “our direct bodily inclination to act in a situated, environmental context” (Kelly 2005, p. 106). Standard interpretations of bodily intentionality see grasping an object as the paradigmatic example of motor intentionality. I will discuss the implications of another, novel perspective that emphasizes the importance of unreflective switches from one activity to another (Rietveld 2004) and understands bodily intentionality in terms of adequate responsiveness to a field of relevant affordances. In the final section I will discuss some implications for cognitive neuroscientists who use empirical findings related to the ‘mirror neuron system’ as a starting point for a theory of motor intentionality and social cognition. (shrink)

The essay constructs an ontological theory designed to capture the categories instantiated in those portions or levels of reality which are captured in our common sense conceptual scheme. It takes as its starting point an Aristotelian ontology of “substances” and “accidents”, which are treated via the instruments of mereology and topology. The theory recognizes not only individual parts of substances and accidents, including the internal and external boundaries of these, but also universal parts, such as the “humanity” which is an (...) essential part of both Tom and Dick, and also “individual relations”, such as Tom’s promise to Dick, or their current handshake. (shrink)

This research explores the historical perspective of business ethics from the viewpoint of the employer–employee relationship by outlining the impact of the changing social contract between employer and employee relations from the end of World War II to the current day; provides the basic definition of the key elements of the organizational social contract and outlines the social contract in employment relations. It also provides what the author believes to be the key drivers in employer–employee relations and the benefits to (...) good employer–employee relations for each individual within the employment relationship. The results of this research indicate a significant shift in business ethics as it relates to the employers relationship to the employee within a work environment. It further shows the state of the employment relationship prior to World War II. Written contracts were unheard of, but rather, the employment agreement was steeped in a tradition that carried the promise sealed with nothing but a handshake. Now employees have little or no rights; and the ones they are given are provided not by the employer, but by government regulation and court precedent. Issues such as time off for illness, sexual harassment, and workers’ compensation are all handled through legal or regulatory means rather than ethical considerations. The research further shows that the distinct lack of leadership within organizations play a significant role in the disintegration of employer–employee relationships. Specifically, how the lack of leadership relates to the emotional intelligence of the leader. Areas such as empathy and social skills are under trained and under developed by organizations. This research shows that the employer who is willing to give employees what they want and need are far more likely to have success, but more importantly, the organizations will be doing the right thing. (shrink)

My 5-year-old granddaughter refers to foods, clothes, and people she does not like as “supergross.” It is a verbiage that I have found myself adopting for talking about many things Trumpian, including the man himself. The gaudy, gold-plated everything in Trump Towers; his ill-fitting suits; his poorly executed fake tan and comb-over; his red baseball cap emblazoned with “Make America Great Again;” his creepy way of talking about women ; his racist vitriol about Blacks, Muslims and Mexicans; his blatant over-the-top (...) narcissism; his uncontrolled tantrums; his ridiculous tweets; his outlandish claims; his awkward hand gestures and handshakes; the disquieting ease with which he is seduced... (shrink)

While spreading wide-world, the new coronavirus Sars-CoV-2 made changes in many social departments of our society on levels we never thought about and messes with all our cultural habits. Thus, we witnessed that the religious denominations took into consideration changes without precedent in their cultic history and thus dogmatic as well concerning the actual threat of Coronavirus. We saw for example the Roman-Catholic Church who suspended all masses here and there[1] at first or banned the crucial gestures in rituals [to (...) suspend the distribution of Holy Communion from the Chalice[2], to distribute the Eucharist preferably into the hands of the faithful, and to avoid the physical contact from a peaceful handshake, to forego ash crosses on forehead, to suspend placing water in holy water fonts at the entrance of churches, that the churchgoers "refrain" from kissing or touching the cross for veneration, or even cancellation of masses]. We witnessed Buddhist temples and Protestant churches around Korea [at first] and beyond that have also suspended religious gatherings, and so on. In my case, the Romanian Orthodox Church did the same thing[3], but in a controversial way, firstly making some recommendations for its believers [e.g. not to kiss public icons in Churches, but their indoor ones, and receive Holy Communion with teaspoons for single-use]; afterward same Church reconsidered these recommendations and withdrew its decision [perhaps at the pressure of civil fundamentalists]. How can we qualify all these measures and, moreover, the withdrawal on behalf of religious believers, as weakness, populism, diligence, assuming the human limits, or...something else? What would be the correct and coherent answer religion should assume in this particular regard, and especially what are the reasons to qualify it in a way or another? (shrink)

There is something important about the way human primates use touch in social encounters; for example, consider greetings in airports (hugs vs. handshakes) and the way children push each other in a playground (a quick push to warn, a really hard one when it is serious!). Human primates use touch as a way of conveying a wide range of social information. In this chapter I will argue that one of the best ways of understanding social cognition in non-human primates is (...) through touch. Moreover, I will argue that if we would like to describe the evolutionary history of social cognition, touch is one of the ideal modes to operationalize social interaction across different kinds of primates. (shrink)

Levinas’s most important contribution to contemporary philosophy is his continual vindication of the primacy of the ethical. For the contemporary reader, educated in the shadow of the Nietzschean thought that existence as will to power is art, this claim comes as an uneasy surprise. What is the place of the aesthetic within the preeminence of the ethical in Levinas’s philosophy? Or, more specifically, what is, for Levinas, the place of art in relation to the ethical? Through a Levinasian reading of (...) Plato, and a Platonic reading of Levinas, the paper argues in favor of Paul Celan’s statement that there is not “any basic difference... between a handshake and a poem.”. (shrink)

A pattern of interaction that arises again and again in programming is a 'handshake', in which two agents exchange data. The exchange is thought of as provision of a service. Each interaction is initiated by a specific agent--the client or Angel--and concluded by the other--the server or Demon. We present a category in which the objects--called interaction structures in the paper--serve as descriptions of services provided across such handshaken interfaces. The morphisms--called (general) simulations--model components that provide one such service, (...) relying on another. The morphisms are relations between the underlying sets of the interaction structures. The proof that a relation is a simulation can serve (in principle) as an executable program, whose specification is that it provides the service described by its domain, given an implementation of the service described by its codomain. This category is then shown to coincide with the subcategory of 'generated' basic topologies in Sambin's terminology, where a basic topology is given by a closure operator whose induced sup-lattice structure need not be distributive; and moreover, this operator is inductively generated from a basic cover relation. This coincidence provides topologists with a natural source of examples for non-distributive formal topology. It raises a number of questions of interest both for formal topology and programming. The extra structure needed to make such a basic topology into a real formal topology is then interpreted in the context of interaction structures. (shrink)

In light of the mandate of social distancing imposed by the Covid-19 pandemic, and the subsequent disruption in habitual practices involving physical contact, the essay explores the ancient gesture of the handshake with reference to both its cultural codifications and its iconography, widespread especially in Mediterranean and Near Eastern areas. While involving manifold semantic and symbolic significance, the handshake is taken into account especially as a gesture implying a tactile exposure to another, hinting at the possibility of joining (...) radically discontinuous worlds. Ancient Greek funerary art is considered and a few final remarks return to the experience of isolation we lived on a global scale in recent years. (shrink)

This column is about experimental tests of the various interpretations of quantum mechanics. The question at issue is whether we can perform experiments that can show whether there is an "observer-created reality" as suggested by the Copenhagen Interpretation, or a peacock’s tail of rapidly branching alternate universes, as suggested by the Many-Worlds Interpretation, or forward-backward in time handshakes, as suggested by the Transactional Interpretation? Until recently, I would have said that this was an impossible task, but a new experiment has (...) changed my view, and I now believe that the Copenhagen and Many-Worlds Interpretations (at least as they are usually presented) have been falsified by experiment. (shrink)

Last June I was an invited speaker at the symposium “Frontiers of Time: Reverse Causation—Experiment and Theory,” part of a meeting of the American Association for the Advancement of Science (AAAS) held on the beautiful campus of the University of San Diego. (Here, reverse causation means a violation of that most mysterious law of physics, the Principle of Causality, which requires that any cause must precede its effects in all reference frames.) I had originally intended to just talk about my (...) work on the transactional interpretation of quantum mechanics and its somewhat retrocausal aspects (i.e., back-in-time handshakes of quantum waves, etc.). However, a new idea involving signaling with nonlocal quantum processes had come my way, and I decided to present it as a retrocausal quantum paradox at the symposium. It made a big splash there, but none of the experts present could identify any problem with the proposed thought experiment or resolve the paradox. In this column I want to tell you about this causality-violating communications scheme and its possible consequences. (shrink)

Albert Einstein taught us that c, the speed of light in vacuum, is nature's ultimate speed limit, the highest speed at which matter, energy, and information can travel through space-time. In several AV columns I've discussed ways for getting around this annoying natural law, the law that SF writers and fans most wish to violate. Two AV columns discussed the possibility of getting around the lightspeed limit by popping through a trans-spatial wormhole shortcut. See [ Analog-6-89, "Wormholes and Time Machines"] (...) and [Analog-5-90, "Wormholes II: Getting There in No Time"]. Two others discussed the possible use the faster-than-light nonlocal handshaking implicit in quantum mechanics for FTL messages and travel. See [Analog-11-86, "The Quantum Handshake"] and [Analog-9-88, "Paradoxes and FTL Communication"]. Both of those methods, however, are beyond our present technology, and the latter is probably impossible. (shrink)

Previous research in the social sciences has shown that haptic interaction rituals are critical for maintaining social relationships. However, during the coronavirus pandemic, ‘social distancing’ was encouraged in order to avoid the spread of disease. Drawing on data from self-ethnography as well as publicly available resources, in this study we explore some new, locally negotiated haptic trajectories to accomplish interaction rituals in the time of coronavirus. First, we present self-ethnographic observations of distancing in face-to-face encounters from our everyday lives. Second, (...) utilizing methods of microanalysis of naturally occurring interaction, we investigate video recordings of the embodied negotiation of space and touch among politicians. We analyze three different ways in which politicians negotiate transitional moves in this haptic ritual when one party initiates a handshake: repairing, declining and apologizing. Our analysis shows that politicians adapt their entire bodies in conjunction with talk, gestures and laughter not only to accomplish the greeting but also to remedy the potentially face-threatening situation of not getting the greeting right. This research has implications for better understanding the spontaneous ability of human beings to invent new ways of engaging with each other. Moreover, it adds to our knowledge of how the materiality of human bodies can impact forms of sociality. (shrink)

Hadiths that have been discussed in this paper consist of narrations regarding divine attributes and having some problematic meanings between supporters of Bişr al-Marīsī and ʿUthmān al-Dārimī. These narrations were mostly accepted denounced (munkar) by Bişr al-Marīsī and his sopporters due to having an anthropormophist and corporealist content about God. They rejected divine attributes according to their understanding of God based on incomparability (tanzīh) which provided by Mutazilite approach towards divine attributes even though they conveyed some features of Ahl al-Ra’y. (...) They found contradicted of attributing human features to God based on their tanzīh understanding, therefore, they interpreted such this kind of narra-tions in terms of their approach or rejected at all. At the other hand, a hard Hadith scholar Uth-man al-Darimi believed that one should accept divine attributes as they are in the Qur’an and Sunna. According to his belief, he considered the explicit meanings of the narrations without interpretation of divine attributes, and based on his perpective he denied Bişr al-Marīsī and his supporters’ interpretations claiming they would cause divesting God of all attributes (ta‘tīl). He argues that these narrations should be taken into considerations based on their explicit mea-nings. The discussions on these hadiths are important due to showing different approaches of scholars from the schools of Ahl al-Ra’y and the ones from Ahl al-Hadith towards the hadith du-ring the period when the main Hadith works were collected. Discussions on the narrations stu-died in this paper reveal two schools’ understandings of divine issues, their approaches to divi-ne attributes, as well inform us their perspectives of hadith in general.Summary: The present paper examines the debates between ʿUthmān al-Dārimī (d. 280/894) and the supporters of Bishr al-Marīsī (d. 218/833) on the divine attributes mentioned in some hadiths in the period when the main hadith books were composed (i.e., III/IXth century). These debates that took place between the scholars of Ahl al-Hadith and Ahl al-Ra’y concern the un-derstanding and interpretation of the hadiths in a certain way.It could be stated that the debates focus on how the hadiths should be understood, or whether it is the explicit meaning of the words or the possible methaphorical meanings beyond them that should be considered.It is worth briefly introducing the parties who discussed the hadiths studied here. The aforementioned discussions about some hadith narrations are between the supporters of Bishr al-Marīsī and ʿUthmān al-Dārimī, one of the important figures of the Ahl al-Hadith who wrote a separate work on these hadiths. This work was written as a rejection of the views of Bishr al-Marīsī and his two students on the attributes of God and some issues regarding hadith.Bishr al-Marīsī was regarded as an important scholar of Kalam who received fiqh education from Abū Yūsuf (d. 182/798). He is a scholar of Ahl al-Ra’y who made scientific dis-cussions with many scholars including Imam al-Shafiʿī (d. 204/820). He was on the council of the Caliph Al-Mamūn (d. 218/833) and had a significant role in the adoption of the idea of the createdness of the Qurʾān (khalq al-Qurʾān).Uthmān al-Dārimī,on the other hand, was a scholar of Ahl al-Hadith who learned ha-dith from the authorities of his era such as Yaḥyā b. Maʿīn (d. 233/847), ʿAlī b. al-Madīnī (d. 234/848), Isḥāq b. Rāhawayh (d. 237/851), and Aḥmad b. Ḥanbal (d. 241/855). Having visited all the important cities for the training of hadith, he learned the hadiths and conveyed them.With the understanding of proving the divine attributes and the opposition of the misin-terpretation of the narratives related to them, the groups advocating the appropriation of these lines in accordance with the understanding of incomparability (tanzīh) have complied the works since the first period. According to ʿUthmān al-Dārimī, the rejection of the divine attributes by Mu'tazila was influential in the emergence of the criticism literature of the Ahl al-Hadith and many authors wrote works in this direction.Regarding a narration by Abū Hurayra, an opponent reports that this narration gives the impression that God has the eyes and ears as we know. ʿUthmān al-Dārimī reports that this hadith proves sight and hearing not the eyes and ear organs. He indicates that God has no like by no means. Therefore, it is slanderous to refer the claim that Allah is made of organs to the Ahl al-Hadith. Abū Dāwūd states that with this hadith the attributes of sight and hearing for God are proved and Jahmiyya’s denial of the divine attributes are rejected.The opponent also considered Abū Hurayra's narration referring to the Prophet: "Faith is from Yemen, wisdom is from Yemen! I feel the breath of your Lord from Yemen!" as denounced (munkar). Because, according to Bishr al-Marīsī and his companions, breath can only come from those with an abdominal cavity, and Allah is free from it. According to ʿUthmān al-Dārimī, the opponent misunderstood. What is meant here is the wind that blows from Yemen and comforts people. In the context of this narration, we see that supporters of Bishr al-Marīsī evaluate the narrative literally, while ʿUthmān al-Dārimī interpret the narrative.Regarding the narration, "You can not approach Allah with something more virtuous than what comes out of it (the Qur'ān)" Ibn al-Saljī reports that Mushabbiha understands this as one with an abdominal cavity and from whom speech comes out. This understanding is in-valid since God is "samad" in the sense that He has no void. With this hadith, it is meant that the Qur'ān comes out of Allah’s presence rather than Allah. According to ʿUthmān al-Dārimī, the real aim of Ibn al-Saljī is to deny God's attribute of speech. There is no doubt that the Qur'ān comes from Him, and those who do not accept it merely deny His attribute of speech.Attributed to Ibn Abbas; The meaning of "yamīn Allah" (the right hand of Allah) in narration "Black Stone (al-ḥajar al-aswad) is the right hand of Allah on earth, handshakes with the people" is not the right hand that we know according to Ibn al-Saljī, it is blessing and grace of Allah. According to ʿUthmān al-Dārimī, who acknowledges that Black Stone is not meant to be a hand, the purpose of Ibn al-Saljī is to deny the two hands mentioned in the verses and ha-diths about Allah with invalid interpretations.ʿUthmān al-Dārimī, who criticized that Ibn al-Saljī quoted from another narration which Ibn Abbās heard from the Prophet, says that such poor narrations should not be spread. In addition, he points out that Ibn al-Saljī's interpretation is ugly and he criticizes it. Because Allah who is mentioned in the narrative is depicted as a young man with curly hair in a green suit. Such a narration is also an untrustworthy narration as it contradicts the authentic narrations of the Prophet. ʿUthmān al-Dārimī, who made this assessment of the narration, rejects the com-ments that the opponent made about the narration. According to the opponent, the phrase "I have come to Allah" means "to come into the presence of Allah in the Garden of Eden." Accor-ding to ʿUthmān al-Dārimī’s understanding, such complicated hadiths should not be only narra-ted.About the narration that are based on the Prophet and he does not know the answer to what he has come to know of himself, then he feels the coolness of his fingers as he puts his hand on his back and learns everything, the opponent evaluates the following: He was not Allah who came to the Prophet, but a well-behaved angel who was being directed by Allah and he was the angel who put his hand. ʿUthmān al-Dārimī rejects this interpretation of that oppo-nent. This comment is also contrary to other authentic hadiths. After he refused to the com-ment of the opponent about relevant narration, ʿUthmān al-Dārimī stated that he could not trust this comment on the basis of the authentic narrations he mentioned.Salaf scholars have preferred to be silent in this regard, as it is seen among the most difficult subjects to talk about divine attributes. However, subsequent generations have held dif-ferent paths in this regard. The basic approaches to understanding the divine attributes can be summarized in three main titles: tafwīd, tashbīh, and ta’wīl. Tafwīd is the path adopted by the early salaf scholars and means to leaving the knowledge about Allah’s entity and attributes to His knowledge. Tashbīh means to compare Allah to the created or the created to Allah. Ta'wīl is to interpret the Qur'ānic verses and hadiths that give the impression that Allah is like the crea-tures with semantics and rational deduction. The ones who deny the adjectives are called as Muʿattila and those who prove their attributes are called as Sifatiyya. According to Ahl al-Ra’y, it is necessary to appropriately make interpretation (ta'wīl) of the attributes giving the impression of anthropomorphism in terms of the dictionary. In the divine attributes, Muʿtazila advoca-ted the incomparability (tanzīh), whereas Ashʿariyya and Māturīdiyya adopted interpretation in accordance with incomparability. Mushabbiha and the Wahhābī-Salafī understanding has also taken the expressions regarding divine attributes with their explicit meanings.The debate between the scholars who lived in the ages II/VIII and III/IX, when the most important works are composed in the science of hadith, is important in that it is the first turn. In addition to this, the debate also contains important information on the approach to the Qur'ānic verses and hadiths, in that it shows two basic approaches, one of which represents the school of Ahl al-Ra’y, and the other represents the school of Ahl al-Hadith.ʿUthmān al-Dārimī generally advocates adhering to the explicit meaning of the narra-tion, while Bishr al-Marīsī and his companions criticize the narration labeling it as denied (mun-kar) or making an interpretation. On rare occasions, the places where ʿUthmān al-Dārimī re-jects the narration and makes interpretation, or where Bishr al-Marīsī and his companions de-fend the narrative can be seen.Interpretations made by Bishr al-Marīsī on the problematic narratives have influenced on the next scholars. Alongside Muʿtazilite scholars such as al-Jubbāʾī (d. 303/916), Qāḍī ʿAbd al-Jabbār (d. 415/1024) and Abū l-Ḥusayn al-Baṣrī (d. 436/1044), his interpretations have been quoted by Sunni scholars such as al-Ghazālī (d. 505/1111), Ibn ʿAqīl (d. 513/1119) and Fakhr al-Dīn al-Rāzī (d. 606/1210).The fact that the truth can be put forward in the science of hadith, which is based on the narration, does not favor one of the "narration" and "ra’y", it should be kept in mind that both of these depend on the proper and balanced use of both. To reveal the truth, the narration is in need of the opinion and the opinion (ra’y) is in need of the narration. Narration and opinion sho-uld be seen as complementary elements, not each other's opponents. (shrink)

Introduction: how John the Baptist kept his head, or my life in film philosophy -- A philosophical perspective. Why not realize your world? -- Silence and stasis -- Film and modernity -- André Bazin as Cavellian realist -- On Stanley Cavell's band wagon -- What becomes of the camera in the world on film? -- Studies in criticism. "I never thought I would sink so low as to become an actor": John Barrymore in Twentieth century -- James Stewart in Vertigo (...) -- Hats off to George Cukor! -- Woody Allen's New York -- Blood is thicker than water: the family in Hitchcock -- Space and speech in the films of Yasujiro Ozu -- Romance, eroticism and the camera's gaze in Jean Genet's Un chant d'amour -- Face to face with Chantal Akerman -- Precious memories in philosophy and film -- Seeing the light in The tree of life -- A film that is also a handshake: philosophy in the films of the Dardenne Brothers -- Justifying justified -- Documentary film in Boston in the 1970s and 1980s -- Sometimes daddies don't talk about things like that -- Jean Rouch as film artist -- Dancing with Gardner: Robert Gardner's films on art -- Dead birds re-encountered: a journey of return -- Notes on the essays. (shrink)

This book delivers philosophy’s first sustained examination of handedness: being left-handed, right-handed, etc. It engages literature from phenomenology and continental philosophy, analytic philosophy, laterality studies, cognitive science and psychology, gender studies and feminist philosophy, sociology, political science, and more to provide a systematic accounting of the nature of handedness, its basis in lived experience, its effects on bodily performance, its role in varieties of inequality, and its part in oppression and liberation. As a radical asymmetry in the body, handedness plays (...) a key role in human flourishing. It informs both personal bodily movement and social life, from handshakes and high fives to high tech tools made for one hand or the other. Moreover, with left-handers making up just 10% of the population, handedness presents a significant inequality in lived experience. To live and live well, we must understand handedness. (shrink)

Let G V, E be a simple undirected complete graph with vertex and edge sets V and E, respectively. In this paper, we consider the degree-constrained k -minimum spanning tree problem which consists of finding a minimum cost subtree of G formed with at least k vertices of V where the degree of each vertex is less than or equal to an integer value d ≤ k − 2. In particular, in this paper, we consider degree values of d ∈ (...) 2,3. Notice that DC k MST generalizes both the classical degree-constrained and k -minimum spanning tree problems simultaneously. In particular, when d = 2, it reduces to a k -Hamiltonian path problem. Application domains where DC k MST can be adapted or directly utilized include backbone network structures in telecommunications, facility location, and transportation networks, to name a few. It is easy to see from the literature that the DC k MST problem has not been studied in depth so far. Thus, our main contributions in this paper can be highlighted as follows. We propose three mixed-integer linear programming models for the DC k MST problem and derive for each one an equivalent counterpart by using the handshaking lemma. Then, we further propose ant colony optimization and variable neighborhood search algorithms. Each proposed ACO and VNS method is also compared with another variant of it which is obtained while embedding a Q-learning strategy. We also propose a pure Q-learning algorithm that is competitive with the ACO ones. Finally, we conduct substantial numerical experiments using benchmark input graph instances from TSPLIB and randomly generated ones with uniform and Euclidean distance costs with up to 400 nodes. Our numerical results indicate that the proposed models and algorithms allow obtaining optimal and near-optimal solutions, respectively. Moreover, we report better solutions than CPLEX for the large-size instances. Ultimately, the empirical evidence shows that the proposed Q-learning strategies can bring considerable improvements. (shrink)

ZusammenfassungDer Artikel analysiert die in der politischen Kommunikation zum Fall Therwil geäußerten Vorstellungen und angestrebten Zielsetzungen bezüglich des Umgangs mit Religion in der Schule. Es steht die Frage im Vordergrund, auf welche Konzepte religiöser Diversität innerhalb dieser Kommunikation rekurriert wird und in welchem Umfang Diversität in der Schule verwirklicht werden soll. Dabei wird eine Diskrepanz zwischen einem auf Inklusion basierenden Diversitätsideal einerseits und der de facto eingeforderten, auf Exklusion zielenden, Handhabung des Therwiler Vorfalls anderseits sichtbar.