A new scheme is proposed in order to deduce an equation of motion for a spinless charged point particle leading to an equivalent Landau–Lifshitz equation of motion. Consequently Larmor’s formula must be substituted by a new expression for the large distance radiation rate of energy. A constraint appears on the applicability of the Maxwell electromagnetic tensor. The particular case of a sudden force is analyzed in order to show the physical results predicted by the new model. A geometrical rearrangement of (...) the energy explains the balance. (shrink)

A new scheme is proposed in order to deduce an equation of motion for a spinless charged point particle leading to an equivalent Landau–Lifshitz equation of motion. Consequently Larmor’s formula must be substituted by a new expression for the large distance radiation rate of energy. A constraint appears on the applicability of the Maxwell electromagnetic tensor. The particular case of a sudden force is analyzed in order to show the physical results predicted by the new model. A geometrical rearrangement of (...) the energy explains the balance. (shrink)

It was shown in Dirac A117, 610; A118, 351, 1928) that the ultra-violet divergence in quantum electrodynamics is caused by a violation of the time-energy uncertainly relationship, due to the implicit assumption of infinitesimal time information. In Wheeler et al. it was shown that Einstein’s special theory of relativity and Maxwell’s field theory have mathematically equivalent dual versions. The dual versions arise from an identity relating observer time to proper time as a contact transformation on configuration space, which leaves phase (...) space invariant. The special theory has a dual version in the sense that, for any set of n particles, every observer has two unique sets of global variables \\) and \\) to describe the dynamics, where \ is the canonical center of mass. In the \\) variables, time is relative and the speed of light is unique, while in the \\) variables, time is unique and the speed of light is relative with no upper bound. In the Maxwell case, the two sets of particle wave equations are not equivalent. The dual version contains an additional longitudinal radiation term that appears instantaneously with acceleration, leading to the prediction that radiation from a cyclotron will not produce photoelectrons. A major outcome is the dual unification of Newtonian mechanics and classical electrodynamics with Einstein’s special theory of relativity, without the need for point particles, without a self-energy divergency and, without need for the problematic Lorentz–Dirac equation. The purpose of this paper is to introduce the dual theory of relativistic quantum mechanics. In our approach, we obtain three distinct dual relativistic wave equations that reduce to the Schrödinger equation when minimal coupling is turned off. We show that the dual Dirac equation provides a new formula for the anomalous magnetic moment of a charged particle. We can obtain the exact value for the electron g-factor and phenomenological values for the muon and proton g-factors. (shrink)

Many biological systems experience a periodic environment. Floquet theory is a mathematical tool to deal with such time periodic systems. It is not often applied in biology, because linkage between the mathematics and the biology is not available. To create this linkage, we derive the Floquet theory for natural systems. We construct a framework, where the rotation of the Earth is causing the periodicity. Within this framework the angular momentum operator is introduced to describe the Earth’s rotation. The Fourier operators (...) and the Fourier states are defined to link the rotation to the biological system. Using these operators, the biological system can be transformed into a rotating frame in which the environment becomes static. In this rotating frame the Floquet solution can be derived. Two examples demonstrate how to apply this natural framework. (shrink)

Kit Fine’s contribution to logic is vast and diverse; the chapters in this book deal with a significant part of it. In this introductory chapter, we clarify and contextualize the main themes of Fine’s work that are centre stage in this book, after which we give a summary of each chapter.

The present paper explores, theoretically, and empirically, whether compliance with the International Code of marketing of breast-milk substitutes impacts on financial performance measured by stock markets. The empirical analysis, which considers a 20-year period, shows that stock markets are indifferent to the level of compliance by manufacturers with the International Code. Two important issues emerge from this result. Based on our finding that financial performance as measured by stock markets cannot explain the level of compliance, the first issue refers to (...) what alternative types of mechanisms drive manufacturers who comply the least with voluntary codes such as the International Code. Conversely, from our finding that stock markets do not reward the most compliant, the second issue raised is an inherent weakness of stock markets to fully incorporate social and environmental values. (shrink)

Teaching and the research of theology and philosophy in Africa faces serious challenges: Contents and methods of study programs are often coined by European universalism. Tertiary institutions depend largely on foreign funding. This study analyzes the situation and suggests a closer collaboration.

The geometric system of deduction called N-Graphs was introduced by de Oliveira in 2001. The proofs in this system are represented by means of digraphs and, while its derivations are mostly based on Gentzen's sequent calculus, the system gets its inspiration from geometrically based systems, such as the Kneales' tables of development, Statman's proofs-as-graphs, Buss' logical flow graphs, and Girard's proof-nets. Given that all these geometric systems appeal to the classical symmetry between premises and conclusions, providing an intuitionistic version of (...) any of these is an interesting exercise in extending the range of applicability of the geometric system in question. In this article we produce an intuitionistic version of N-Graphs, based on Maehara's LJ' system, as described by Takeuti. Recall that LJ' has multiple conclusions in all but the essential intuitionistic rules, e.g., implication right and negation right. We show soundness and completeness of our intuitionistic N-Graphs with respect to LJ'. We also discuss how we expect to extend this work to a version of N-Graphs corresponding to the intuitionistic logic system FIL (Full Intuitionistic Logic) of de Paiva and Pereira and sketch future developments. (shrink)

The Dutch law states that a physician may perform euthanasia according to a written advance euthanasia directive when a patient is incompetent as long as all legal criteria of due care are met. This may also hold for patients with advanced dementia. We investigated the differing opinions of physicians and members of the general public on the acceptability of euthanasia in patients with advanced dementia.

From past research it is well known that social exclusion has detrimental consequences for mental health. To deal with these adverse effects, socially excluded individuals frequently turn to other humans for emotional support. While chatbots can elicit social and emotional responses on the part of the human interlocutor, their effectiveness in the context of social exclusion has not been investigated. In the present study, we examined whether an empathic chatbot can serve as a buffer against the adverse effects of social (...) ostracism. After experiencing exclusion on social media, participants were randomly assigned to either talk with an empathetic chatbot about it (e.g., “I'm sorry that this happened to you”) or a control condition where their responses were merely acknowledged (e.g., “Thank you for your feedback”). Replicating previous research, results revealed that experiences of social exclusion dampened the mood of participants. Interacting with an empathetic chatbot, however, appeared to have a mitigating impact. In particular, participants in the chatbot intervention condition reported higher mood than those in the control condition. Theoretical, methodological, and practical implications, as well as directions for future research are discussed. (shrink)

Borsboom and colleagues have recently proposed a “network theory” of psychiatric disorders that conceptualizes psychiatric disorders as relatively stable networks of causally interacting symptoms. They have also claimed that the network theory should include non-symptom variables such as environmental factors. How are environmental factors incorporated in the network theory, and what kind of explanations of psychiatric disorders can such an “extended” network theory provide? The aim of this article is to critically examine what explanatory strategies the network theory that includes (...) both symptoms and environmental factors can accommodate. We first analyze how proponents of the network theory conceptualize the relations between symptoms and between symptoms and environmental factors. Their claims suggest that the network theory could provide insight into the causal mechanisms underlying psychiatric disorders. We assess these claims in light of network analysis, Woodward’s interventionist theory, and mechanistic explanation, and show that they can only be satisfied with additional assumptions and requirements. Then, we examine their claim that network characteristics may explain the dynamics of psychiatric disorders by means of a topological explanatory strategy. We argue that the network theory could accommodate topological explanations of symptom networks, but we also point out that this poses some difficulties. Finally, we suggest that a multilayer network account of psychiatric disorders might allow for the integration of symptoms and non-symptom factors related to psychiatric disorders and could accommodate both causal/mechanistic and topological explanations. (shrink)

On page 1 of his classic text, Millsap states, “Measurement invariance is built on the notion that a measuring device should function the same way across varied conditions, so long as those varied conditions are irrelevant [emphasis added] to the attribute being measured.” By construction, measurement invariance techniques require not only detecting varied conditions but also ruling out that these conditions inform our understanding of measured domains. In fact, measurement invariance techniques possess great utility when theory and research inform their (...) application to specific, varied conditions that, if not detected, introduce measurement biases, and, thus, depress measurement validity. Yet, we see emerging bodies of work where scholars have “put the cart before the horse” when it comes to measurement invariance, and they apply these techniques to varied conditions that, in fact, may reflect domain-relevant information. These bodies of work highlight a larger problem in measurement that likely cuts across many areas of scholarship. In one such area, youth mental health, researchers commonly encounter a set of conditions that nullify the use of measurement invariance, namely discrepancies between survey reports completed by multiple informants, such as parents, teachers, and youth themselves. In this paper, we provide an overview of conceptual, methodological, and measurement factors that should prevent researchers from applying measurement invariance techniques to detect informant discrepancies. Along the way, we cite evidence from the last 15 years indicating that informant discrepancies reflect domain-relevant information. We also apply this evidence to recent uses of measurement invariance techniques in youth mental health. Based on prior evidence, we highlight the implications of applying these techniques to multi-informant data, when the informant discrepancies observed within these data might reflect domain-relevant information. We close by calling for a moratorium on applying measurement invariance techniques to detect informant discrepancies in youth mental health assessments. In doing so, we describe how the state of the science would need to fundamentally “flip” to justify applying these techniques to detect informant discrepancies in this area of work. (shrink)

The rise of Internet-mediated communication poses possibilities and challenges for organisation studies, also in the area of corporate social responsibility and business and society interactions. Although social media are attracting more and more attention in this domain, websites also remain an important channel for CSR debate. In this paper, we present an explorative study of activist groups’ online presence via their websites and propose a combination of methods to study both the structural positioning of websites and the meanings in these (...) websites. We focus on the websites of SOMO, the Centre for Research on Multinational Corporations, and of one of its campaigns, makeITfair, concerned with labour conditions in the IT industry worldwide. This allows us to show how this combination of methods can further our understanding of the way activist networks’ online presence can provide insights into the tactics these networks apply to achieve institutional change on CSR issues. Meanwhile, we identify some notable differences between styles and word use in the two organisations’ websites. We conclude with a set of suggestions for future research. (shrink)

IntroductionCardiology is characterized by its state-of-the-art biomedical technology and the predominance of Evidence-Based Medicine. This predominance makes it difficult for healthcare professionals to deal with the ethical dilemmas that emerge in this subspecialty. This paper is a first endeavor to empirically investigate the axiological foundations of the healthcare professionals in a cardiology hospital. Our pilot study selected, as the target population, cardiology personnel not only because of their difficult ethical deliberations but also because of the stringent conditions in which they (...) have to make them. Therefore, there is an urgent need to reconsider clinical ethics and Value-Based Medicine. This study proposes a qualitative analysis of the values and the virtues of healthcare professionals in a cardiology hospital in order to establish how the former impact upon the medical and ethical decisions made by the latter.ResultsWe point out the need for strengthening the roles of healthcare personnel as educators and guidance counselors in order to meet the ends of medicine, as well as the need for an ethical discernment that is compatible with our results, namely, that the ethical values developed by healthcare professionals stem from their life history as well as their professional education.ConclusionWe establish the kind of actions, communication skills and empathy that are required to build a stronger patient-healthcare professional relationship, which at the same time improves prognosis, treatment efficiency and therapeutic adhesion. (shrink)

For the epic journey of autumn migration, long-distance migratory birds use innate and learned information and follow strict schedules imposed by genetic and epigenetic mechanisms, the details of which remain largely unknown. In addition, bird migration requires integrated action of different multisensory systems for learning and memory, and the hippocampus appears to be the integration center for this task. In previous studies we found that contrasting long-distance migratory flights differentially affected the morphological complexity of two types of hippocampus astrocytes. Recently, (...) a significant association was found between the latitude of the reproductive site and the size of the ADCYAP1 allele in long distance migratory birds. We tested for correlations between astrocyte morphological complexity, migratory distances, and size of the ADCYAP1 allele in three long-distance migrant species of shorebird and one non-migrant. Significant differences among species were found in the number and morphological complexity of the astrocytes, as well as in the size of the microsatellites of the ADCYAP1 gene. We found significant associations between the size of the ADCYAP1 microsatellites, the migratory distances, and the degree of morphological complexity of the astrocytes. We suggest that associations between astrocyte number and morphological complexity, ADCYAP1 microsatellite size, and migratory behavior may be part of the adaptive response to the migratory process of shorebirds. (shrink)

Sentences such as "The author started the book" are indeterminate because they do not make explicit what the subject (the author) started doing with the object (the book). In principle, indeterminate sentences allow for an infinite number of interpretations. One theory, however, assumes that these sentences are resolved by semantic coercion, a linguistic process that forces the noun "book" to be interpreted as an activity (e.g., writing the book) or by a process that interpolates this activity information in the resulting (...) enriched semantic composition. An alternative theory, pragmatic, assumes classical semantic composition, whereby meaning arises from the denotation of words and how they are combined syntactically, with enrichment obtained via pragmatic inferences beyond linguistic-semantic processes. Cognitive neuroscience studies investigating the neuroanatomical and functional correlates of indeterminate sentences have shown activations either at the ventromedial pre-frontal cortex or at the left inferior frontal gyrus. These studies have supported the semantic coercion theory assuming that one of these regions is where enriched semantic composition takes place. Employing fMRI, we found that indeterminate sentences activate bilaterally the superior temporal gyrus, the right inferior frontal gyrus, and the anterior cingulate cortex, more so than control sentences ("The author wrote the book"). Activation of indeterminate sentences exceeded that of anomalous sentences ("…drank the book") and engaged more left- and right-hemisphere areas than other sentence types. We suggest that the widespread activations for indeterminate sentences represent the deployment of pragmatic-inferential processes, which seek to enrich sentence content without necessarily resorting to semantic coercion. (shrink)

This study aims to contribute to emerging human-robot interaction research by adding longitudinal findings to a limited number of long-term social robotics home studies. We placed 70 robots in users’ homes for a period of up to six months, and used questionnaires and interviews to collect data at six points during this period. Results indicate that users’ evaluations of the robot dropped initially, but later rose after the robot had been used for a longer period of time. This is congruent (...) with the so-called mere-exposure effect, which shows an increasing positive evaluation of a novel stimulus once people become familiar with it. Before adoption, users focus on control beliefs showing that previous experiences with robots or other technologies allows to create a mental image of what having and using a robot in the home would entail. After adoption, users focus on utilitarian and hedonic attitudes showing that especially usefulness, social presence, enjoyment and attractiveness are important factors for long-term acceptance. (shrink)

Despite recent progress in the identification of genes that regulate longevity, aging remains a mysterious process. One influential hypothesis is the idea that the potential for cell division and replacement are important factors in aging. In this work, we review and discuss this perspective in the context of interventions in mammals that appear to accelerate or retard aging. Rather than focus on molecular mechanisms, we interpret results from an integrative biology perspective of how gene products affect cellular functions, which in (...) turn impact on tissues and organisms. We review evidence suggesting that mutations that give rise to features resembling premature aging tend to be associated with cellular phenotypes such as increased apoptosis or premature replicative senescence. In contrast, many interventions in mice that extend lifespan and might delay aging, including caloric restriction, tend to either hinder apoptosis or result in smaller animals and thus may be the product of fewer cell divisions. Therefore, it appears plausible that changes in the number of times that cells, and particularly stem cells, divide during an organism's lifespan influence longevity and aging. We discuss possible mechanisms related to this hypothesis and propose experimental paradigms. BioEssays 30:567–578, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The "Thinking of Thinking" in MetaphysicsA.9 JOSEPH G. DE FILIPPO a+~6v &Qa voE[, e~eQ ~o~t ~6 XQ&~O~OV, xetl. I~o~tv ~1VdOloLgvo1]o~t0g v6"qotg. (A.9, 1o74b33-34) Therefore it thinks itself, if indeed it is most powerful, and its thinking is the thinking of thinking. Thus culminates Aristotle's treatment of God's activity in the twelfth book of the Metaphysics. The conclusion seems transparent. God is an intellect (vo~Sg); since he is also the (...) best thing, and it is absurd that he should think anything worse than himself, he therefore thinks himself. And since he is nothing other than a thinking (v6"qotg), what he thinks of is thinking (vo~loEe0g). "Thinking of thinking," however, is a notion that is as ambiguous in ancient Greek as it is in English. It is just not clear what sort of thing such a reflexively self-thinking mind would be, though it might seem natural to construe the activity of Aristotle's God as somehow an act of pure self-awareness, self-consciousness or self-knowledge. On such an understanding God would be a separately existing consciousness, with himself or his activity as the only object of that consciousness. In 196 9 R. Norman published a paper which disputed this sort of interpretation.' He argued that when one considers Aristotle's theory of, R. Norman, "Aristotle's Philosopher-God," Phronesis 14 (1969): 63-74 (reprinted in Articles on Aristotle, vol. 4, ed. J. Barnes, M. Schofield and R. Sorabji [London, 1979], 93-1o2). While I a-m indebted to Norman's basic approach, my treatment of God's self-thought differs substantially from his in two respects. First, although it isessential to recognize that in Aristotle human thought too thinks itself, this does not justify the conclusion that God's thinking is "of the same kind as our own normal abstract thought" (73). As 1shall argue below in section 4, the characterization of the Prime Mover as v6"qoLgvo~o~t0g is meant specifically to differentiate its activity from the selfthinking of human volSg;human thought could never be characterized as v6"qotgvofioEt0g.Secondly, Norman does not isolate the real source of A.9's argument, which, as l shall argue, is the potential conflict between Aristotle's own physical and psychological theories. M. Wedin, Mind and Imagination in Aristotle (New Haven, 1988), 229-45, also argues against Norman's thesis that human and divine thought are the same in kind. [543] 544 JOURNAL OF THE HISTORY OF PHILOSOPHY 33:4 OCTOBER 1995 volSg from De Anima III.4-8, it is clear that the conception of God as a selfthinking mind does not entail that he engages in self-contemplation in the normal sense of the term. On Norman's interpretation, God thinks himself because he thinks a definite content with which he is numerically identical, according to the well-known Aristotelian doctrine of the unity of vo~g with its object of thought (vo~lx6v). To describe this act simply as self-contemplation belies the fact that its object must have an intelligible content, which in the case of God is not adequately described as his "self," for this self would indeed be nothing more than an act of self-contemplation. While many commentators have followed Norman in recognizing that the description of God as "thinking himself" is drawn from the De Anima's characterization of self-thinking, there has persisted a tendency to interpret Aristotle 's God as engaged in an act of pure self-awareness or under some similar description.' The reason for this persistence is due, I believe, to a crucial difference between chapters 7 and 9 of book A. Whereas both chapters characterize the Prime Mover (PM) as a self-thinker, in chapter 9 he is also said to be ~1 v61]otg vo~loec0g V6tlOtg (the thinking of thinking), which understandably appears to be a much more specific delineation of his thought content. A. 7 tells us that the PM is a vofJg that thinks itself (to72b18-3o); according to De Anima III. 4 that simply is what voa)g does at the highest level of actuality, since it... (shrink)

As a celebration of theTractatus100th anniversary it might be worth revisiting its relation to the later writings. From the former to the latter, David Pears recalls that “everyone is aware of the holistic character of Wittgenstein’s later philosophy, but it is not so well known that it was already beginning to establish itself in theTractatus” (The False Prison, 1987). From the latter to the former, Stephen Hilmy’s (The Later Wittgenstein, 1987) extensive study of theNachlasshas helped removing classical misconceptions such as (...) Hintikka’s claim that “Wittgenstein in thePhilosophical Investigationsalmost completely gave up the calculus analogy.” Hilmy points out that even in theInvestigationsone finds the use of the calculus/game paradigm to the understanding of language, such as “in operating with the word” (Part I, §559) and “it plays a different part in the calculus”. Hilmy also quotes from a late (1946) unpublished manuscript (MS 130) “this sentence has use in the calculus of language”, which seems to be compatible with “asking whether and how a proposition can be verified is only a particular way of asking ‘How do you mean?’” Central in this back and forth there is an aspect which seems to deserve attention in the discussion of a semantics for the language of mathematics which might be based on (normalisation of) proofs and/or Hintikka/Lorenzen game-dialogue: the explication of consequences. Such a discussion is substantially supported by the use of the open and searchableThe Wittgenstein Archives at the University of Bergen. These findings are framed within the discussion of the meaning of logical constants in the context of natural deduction style rules of inference. (shrink)

As Macnamara (1978) once asked, how can we talk about what we see? We report on a study manipulating realistic dynamic scenes and sentences aiming to understand the interaction between linguistic and visual representations in real-world situations. Specifically, we monitored participants’ eye movements as they watched video clips of everyday scenes while listening to sentences describing these scenes. We manipulated two main variables. The first was the semantic class of the verb in the sentence and the second was the action/motion (...) of the agent in the unfolding event. The sentences employed two verb classes—causatives (e.g., break) and perception/psychological (e.g., notice)—which impose different constraints on the nouns that serve as their grammatical complements. The scenes depicted events in which agents either moved towards a target object (always the referent of the verb-complement noun), away from it, or remained neutral performing a given activity (such as cooking). Scenes and sentences were synchronized such that the verb onset corresponded to the first video frame of the agent motion towards or away from the object. Results show effects of agent motion but weak verb-semantic restrictions: causatives draw more attention to potential referents of their grammatical complements than perception verbs only when the agent moves towards the target object. Crucially, we found no anticipatory verb-driven eye movements toward the target object, contrary to studies using non-naturalistic and static scenes. We propose a model in which linguistic and visual computations in real-world situations occur largely independent of each other during the early moments of perceptual input, but rapidly interact at a central, conceptual system using a common, propositional code. Implications for language use in real world contexts are discussed. (shrink)

Humphreys and Forde fail to account for the ontology of the “features” that they claim are constitutive of concepts. This failure is common to decompositional theories of conceptual representation. Category-specific deficits can be better explained by a theory that takes inferential relations among atomic concepts to be the key characteristic of conceptual representation and processing.

This essay deals with the problem of the status of colours, traditionally considered as the paradigmatic case of secondary qualities: do colours exist only as aspects of experience or are they real properties of objects, existing independently of human and animal perception? Recently, John Campbell has argued in favour of the simple view of colours, according to which colours are real properties of objects. I discuss the place of Campbell's position in a debated which was started by John Mackie and (...) continued by John McDowell, and defend it from a criticism due to Michael Smith. I conclude that the simple view is a philosophically credible position. Subsequently, I consider an alleged contradiction between the simple view and semantic externalism pointed out by Jim Edwards. I suggest that a supporter of the simple view may consistently maintain semantic externalism, if she also accepts epistemological externalism about the canonical warrant of perceptual judgements. (shrink)

“He who tries to rise above reason, falls outside of it,” said Plotinus. If this be so; if, as Plotinus said also, “ Nous is King,” reason must cover more than inferential reasoning. The methods of inference are not sovereign, but manifestly instrumental; they furnish the scaffolding for the mind's ascent, but not the goal of its endeavour. This distinction between the wider and the narrower use of reason is familiar in every age of thought; it appears in the Platonic (...) and Aristotelian doctrines of Nous, in Aquinas's discrimination of discursive and intuitive knowledge, in Spinoza's of ratio and scientia intuiliva, and in that of the understanding and the reason in post–Kantian idealism. At times, as in the case last mentioned, it has been pressed to an extreme, with the result that reason was set in sharp contrast to the understanding, which came to be regarded as a separate faculty and even as a source of error. Wordsworth, to whom the antithesis passed through Coleridge, wrote of “that false secondary power, by which we multiply distinctions.” In face of such excesses, it behoves us to be on our guard, and to remember that thought is one amid the diversity of its operations, and that faith is at least as fallible as logic. It is only by co-operating in the service of reason that either can point the way to truth. (shrink)

We were led, at the close of the last paper, to the conclusion that the moral judgment lays claim to a knowledge of what is unknowable. It is not merely that our volition is imperfect, that the act of necessity falls short of what we know to be right. This seems bad enough; but the plight in which we actually find ourselves is even worse. The paradox is that we never know, and never can know, in any particular situation, what (...) it is really right to do. We know indeed that it is always right, really and absolutely right, to do what we believe to be right. For a man to act “against his conscience,” after all possible thought has been taken for its enlightenment, we know to be morally wrong. But this knowledge is purely formal and gives no clue to the matter of moral obligation. It tells us what is common alike to any and every case of moral duty; it does not tell us what we ought to do. For the right that we will cannot be merely the rightness of willing it. What I ought to do cannot be merely that I ought to do it. Now our beliefs and judgments as to material rightness, i.e. as to what it is right to do in a concrete situation, are notoriously liable to error. So we seek for a criterion by which to test our variable and fallible judgments, a criterion of what is really right. But the search is doomed to failure; we can only test beliefs by beliefs, our former beliefs by our later, the beliefs of one man or society or age by those of others. (shrink)

The two basic forms of action distinguished in the preceding articles, viz., moral action, where praxis is for praxis sake, and action for a good, where praxis is for the sake of theôria, are found in close relationship to one another in human life. The part they play is rather that of abstract moments in a practical process than that of self-contained and isolable bits of conduct. No philosopher is likely to discount the importance of thus analysing the concrete into (...) its factors before he rectifies the abstraction by showing how they co-operate in actual experience. In any individual biography we can find acts and courses of action in which duty is the dominant motive, and others in which the dominant motive is desire of good. Similarly, when we compare different biographies with one another, some exemplify most strikingly the struggle for righteousness against unruly passion, others the spontaneous aspiration of the soul to attain the goal of its desire. But neither the moral law nor the summum bonum wields an exclusive sovereignty. St. Paul and Luther, in their warfare against carnal desire, drew strength from the ideal vision; nor were St. Bernard or Spinoza, for all their absorption upon union with the divine, strangers to the call of moral obligation. In the lives of ordinary men, the types of conduct are, perhaps, more evenly balanced; yet here also the distinction is discernible. Moreover, it is easy to see how, despite their intrinsic difference, they come to be associated and “by just exchange” to effect a mutual enrichment. (shrink)

Heterocyst spacing in blue -green bacteria is widely assumed to be due to a diffusible inhibitor. The inhibitor, a nitrogen-rich compound, probably glutamine, is produced via the N2-fixing enzymes of the heterocyst and in turn serves to suppress the induction of these enzymes and of the differentiation of vegetative cells to heterocysts. This simple morphogenetic mechanism operating in growing cellular filaments ofAnabaena species is investigated on the basis of a continuous and a discrete cellular model, as well as by cell-by-cell (...) simulation of the inhibitor transport. The resulting distances between heterocysts and kinetics of their production are compared with observations, and the values of physical parameters are estimated from the models. (shrink)

Computer vision research involving street and road detection methods usually focuses on driving assistance and autonomous vehicle systems. In this context, street segmentation occurs in real-time, based on images centered on the street. This work, on the other hand, uses street segmentation for urban planning research to classify pavement types of a city or region, which is particularly important for developing countries. For this application, it is needed a dataset with images from various locations for each street. These images are (...) not necessarily centered on the street and include challenges that are not common in street segmentation datasets, such as mixed pavement types and the presence of faults and holes on the street. We implemented a multi-class version of a state-of-the-art segmentation algorithm and adapted it to perform street pavement classification, handling navigation along streets and angle variation to increase the accuracy of the classification. A data augmentation approach is also proposed to use preliminary results from the test instances as new ground truth and increase the amount of training data. A dataset with more than 300,000 images from 773 streets from a Brazilian city was built. Our approach achieved a precision of 0.93, showing the feasibility of the proposed application. (shrink)

The intention here is that of giving a formal underpinning to the idea of ‘meaning-is-use’ which, even if based on proofs, it is rather different from proof-theoretic semantics as in the Dummett–Prawitz tradition. Instead, it is based on the idea that the meaning of logical constants are given by the explanation of immediate consequences, which in formalistic terms means the effect of elimination rules on the result of introduction rules, i.e. the so-called reduction rules. For that we suggest an extension (...) to the Curry– Howard interpretation which draws on the idea of labelled deduction, and brings back Frege’s device of variable-abstraction to operate on the labels (i.e., proof-terms) alongside formulas of predicate logic. (shrink)

Societally salient issues, like migration, stimulate user engagement with political parties on social media. This user engagement, in turn, is associated with political behavior, such as voting. Nonetheless, few studies so far have investigated the interaction between these factors. We examine how anti-immigration attitudes are associated with user engagement with political parties on social media. In this study, user engagement is understood as following political parties on social media. Through online data that were collected in October 2019 among adults (N= (...) 1,000) in Belgium, we investigate how attitudes and user engagement are associated with voting behavior. Results suggest that attitudes towards migration are associated with user engagement with both left and right-wing parties on social media. Moreover, these attitudes and user engagement – and the interaction between the two – are related to voting behavior: being against (being in favor of) migration and following right-wing (left-wing) parties on social media is associated with a higher likelihood of voting for a right-wing (left-wing) party. (shrink)

The intention here is that of giving a formal underpinning to the idea of 'meaning-is-use' which, even if based on proofs, it is rather different from proof-theoretic semantics as in the Dummett-Prawitz tradition. Instead, it is based on the idea that the meaning of logical constants are given by the explanation of immediate consequences, which in formalistic terms means the effect of elimination rules on the result of introduction rules, i. e. the so-called reduction rules. For that we suggest an (...) extension to the Curry-Howard interpretation which draws on the idea of labelled deduction, and brings back Frege's device of variable-abstraction to operate on the labels (i. e., proof-terms) alongside formulas of predicate logic. (shrink)

In spite of extensive criticisms, war metaphors are still widespread in medical discourse. In the domain of public health analogies between war and infectious diseases are rooted in the similar impacts they can have on political institutions and communities. This similarity has been emphasized by the recent trend of addressing infectious disease from the point of view of national security. Nevertheless, it is here argued that the analogy cannot be used to model normative principles for treating carriers of contagious diseases (...) after the principles of ius in bello . Yet, the analogy may provide some useful practical and theoretical insights in tackling the growing problem of limiting the spread of drug-resistant pathogens: an issue that generates increasing worries and raises difficult ethical and political questions of rights, responsibilities and obligations. It is suggested that if anti-microbials and antibiotics are seen as strategic information, their misuse can be usefully compared to careless talk in times of war. (shrink)

The student of Spinoza is faced by a peculiar difficulty. On opening the Ethics —Spinoza's chief work, completed for publication shortly before his death in 1674—he finds a system of metaphysics set forth in geometrical form, starting from definitions, axioms, and postulates, and advancing synthetically from first principles to a detailed interpretation of the universe. The difficulty lies not in the language— Spinoza's Latin is easy to construe, and there are translations—nor in the lack of literary graces; his style indeed (...) is singularly impressive in its austere dignity. It lies rather in this, that the method of exposition conveys a misleading suggestion of dogmatism and finality, and conceals almost all traces of the patient inquiries that issued in the finished structure. If once the principles of the system are admitted, the rest appears to follow by logical necessity. But by what processes of thought was Spinoza led to those principles? This is the problem that besets the reader: in order to understand the Ethics, he must penetrate behind the text of the propositions to their significance as answers to the questions that were stirring in Spinoza's mind. (shrink)

Animals use their chemosensory systems to detect and discriminate among chemical cues in the environment. Remarkable progress has recently been made in our knowledge of the molecular and cellular basis of chemosensory perception in insects, based largely on studies in Drosophila. This progress has been possible due to the identification of gene families for olfactory and gustatory receptors, the use of electro‐physiological recording techniques on sensory neurons, the multitude of genetic manipulations that are available in this species, and insights from (...) several insect model systems. Recent studies show that the superfamily of chemoreceptor proteins represent the essential elements in chemosensory coding, endowing chemosensory neurons with their abilities to respond to specific sets of odorants, tastants or pheromones. Investigating how insects detect chemicals in their environment can show us how receptor protein structures relate to ligand binding, how nervous systems process complex information, and how chemosensory systems and genes evolve. BioEssays 28:23–34, 2006. © 2005 Wiley Periodicals, Inc. (shrink)

“The object of the moral faculty,” wrote Butler in a classic passage of theDissertation on Virtue, “is actions, comprehending under that name active or practical principles: those principles from which men would act if occasions or circumstances gave them power, and which, when fixed and habitual in any person, we call his character. It does not appear that brutes have the least reflex” “sense of actions, as distinguished from events; or that will and design, which constitute the very nature of (...) action as such, are at all an object to their perception. But to ours they are: and they are the object, and the only one, of the approving and disapproving faculty. (shrink)

“The object of the moral faculty,” wrote Butler in a classic passage of theDissertation on Virtue, “is actions, comprehending under that name active or practical principles: those principles from which men would act if occasions or circumstances gave them power, and which, when fixed and habitual in any person, we call his character. It does not appear that brutes have the least reflex” “sense of actions, as distinguished from events; or that will and design, which constitute the very nature of (...) action as such, are at all an object to their perception. But to ours they are: and they are the object, and the only one, of the approving and disapproving faculty. (shrink)

We have been led by our preliminary survey to acknowledge the autonomy of the moral life. The Tightness of an action is something that is sui generis and ultimate. It is vain to seek a reason for the rightness other than the Tightness itself. To the question, “Why ought I to do what I ought?” the only answer is, “Because I ought to do it.” 1 It is with rightness as with truth: Vera idea est norma sui et falsi. In (...) any moral situation, we intuitively judge what it is right to do, and in judging recognize that the obligation to do it is unconditional. That we possess this capacity is what is meant by saying that we are moral beings. (shrink)

The present study assessed the language teachers' pedagogical beliefs and orientations in integrating technology in the online classroom and its effect on students' motivation and engagement. It utilized a cross-sectional correlational research survey. The study respondents were the randomly sampled 205 language teachers (μ= 437, n= 205) and 317 language students (μ= 1800, n= 317) of select higher educational institutions in the Philippines. The study results revealed that respondents hold positive pedagogical beliefs and orientations using technology-based teaching in their language (...) classroom. Test of difference showed that female teachers manifested a firmer belief in student-centered online language teaching than their male counterparts. However, the utilization and attitude towards technology in the language classroom is favorably associated with the male teachers. As to students' level of language learning motivation and engagement, it was found out that male and female students have high level of language learning engagement. Further, the test of relationship showed that the higher the teachers' belief in utilizing student-centered teaching to integrate technology in the language classroom, the higher the students are motivated and engaged in learning. In like manner, it was also revealed that teacher-centered belief is negatively correlated to student’s motivation and engagement in online language learning. In this regard, the pedagogical assumptions that hold EFL teachers positively to integrate technology in the language classroom. This study generally offers implications for enhancing language teacher's digital literacy to promote motivating, fruitful, and engaging language lessons for 21ts century learning. (shrink)

In this paper art history and visual studies, the disciplines that study visual culture, are presented as a field whose conjectural paradigm can be used to understand the epistemic problems associated with abduction. In order to do so, significant statements, concepts and arguments from the work of several specialists in this field have been highlighted. Their analysis shows the fruitfulness and potential for understanding the study of visual culture as a field that is interwoven with the assumptions of abductive cognition.

In lieu of an abstract, here is a brief excerpt of the content:The "Thinking of Thinking" in MetaphysicsA.9 JOSEPH G. DE FILIPPO a+~6v &Qa voE[, e~eQ ~o~t ~6 XQ&~O~OV, xetl. I~o~tv ~1VdOloLgvo1]o~t0g v6"qotg. (A.9, 1o74b33-34) Therefore it thinks itself, if indeed it is most powerful, and its thinking is the thinking of thinking. Thus culminates Aristotle's treatment of God's activity in the twelfth book of the Metaphysics. The conclusion seems transparent. God is an intellect (vo~Sg); since he is also the (...) best thing, and it is absurd that he should think anything worse than himself, he therefore thinks himself. And since he is nothing other than a thinking (v6"qotg), what he thinks of is thinking (vo~loEe0g). "Thinking of thinking," however, is a notion that is as ambiguous in ancient Greek as it is in English. It is just not clear what sort of thing such a reflexively self-thinking mind would be, though it might seem natural to construe the activity of Aristotle's God as somehow an act of pure self-awareness, self-consciousness or self-knowledge. On such an understanding God would be a separately existing consciousness, with himself or his activity as the only object of that consciousness. In 196 9 R. Norman published a paper which disputed this sort of interpretation.' He argued that when one considers Aristotle's theory of, R. Norman, "Aristotle's Philosopher-God," Phronesis 14 (1969): 63-74 (reprinted in Articles on Aristotle, vol. 4, ed. J. Barnes, M. Schofield and R. Sorabji [London, 1979], 93-1o2). While I a-m indebted to Norman's basic approach, my treatment of God's self-thought differs substantially from his in two respects. First, although it isessential to recognize that in Aristotle human thought too thinks itself, this does not justify the conclusion that God's thinking is "of the same kind as our own normal abstract thought" (73). As 1shall argue below in section 4, the characterization of the Prime Mover as v6"qoLgvo~o~t0g is meant specifically to differentiate its activity from the selfthinking of human volSg;human thought could never be characterized as v6"qotgvofioEt0g.Secondly, Norman does not isolate the real source of A.9's argument, which, as l shall argue, is the potential conflict between Aristotle's own physical and psychological theories. M. Wedin, Mind and Imagination in Aristotle (New Haven, 1988), 229-45, also argues against Norman's thesis that human and divine thought are the same in kind. [543] 544 JOURNAL OF THE HISTORY OF PHILOSOPHY 33:4 OCTOBER 1995 volSg from De Anima III.4-8, it is clear that the conception of God as a selfthinking mind does not entail that he engages in self-contemplation in the normal sense of the term. On Norman's interpretation, God thinks himself because he thinks a definite content with which he is numerically identical, according to the well-known Aristotelian doctrine of the unity of vo~g with its object of thought (vo~lx6v). To describe this act simply as self-contemplation belies the fact that its object must have an intelligible content, which in the case of God is not adequately described as his "self," for this self would indeed be nothing more than an act of self-contemplation. While many commentators have followed Norman in recognizing that the description of God as "thinking himself" is drawn from the De Anima's characterization of self-thinking, there has persisted a tendency to interpret Aristotle 's God as engaged in an act of pure self-awareness or under some similar description.' The reason for this persistence is due, I believe, to a crucial difference between chapters 7 and 9 of book A. Whereas both chapters characterize the Prime Mover (PM) as a self-thinker, in chapter 9 he is also said to be ~1 v61]otg vo~loec0g V6tlOtg (the thinking of thinking), which understandably appears to be a much more specific delineation of his thought content. A. 7 tells us that the PM is a vofJg that thinks itself (to72b18-3o); according to De Anima III. 4 that simply is what voa)g does at the highest level of actuality, since it... (shrink)

Institutional theory of law (ITL) reflects both continuity and change of Kelsen's legal positivism. The main alteration results from the way ITL extends Hart's linguistic turn towards ordinary language philosophy (OLP). Hart holds – like Kelsen – that law cannot be reduced to brute fact nor morality, but because of its attempt to reconstruct social practices his theory is more inclusive. By introducing the notion of law as an extra-linguistic institution ITL takes a next step in legal positivism and accounts (...) for the relationship between action and validity within the legal system. There are, however, some problems yet unresolved by ITL. One of them is its theory of meaning. An other is the way it accounts for change and development. Answers may be based on the pragmatic philosophy of Charles Sanders Peirce, who emphasises the intrinsic relation between the meaning of speech acts and the process of habit formation. (shrink)

SummaryTake the following version of scientific realism: we have good reason to believe that (some of the) current scientific theories tell us something specific about the underlying, i.e. unobservable, structures of the world, for instance that there are electrons with a certain electric charge, or that there are viruses that cause certain diseases. Popper, the rationalist, would not have adhered to the proposed formulation of scientific realism in terms of the rationality of existential beliefs concerning unobservables. Popper did not believe (...) in belief. According to Van Fraassen, the empiricist, one may yet have a rational existential belief concerning unobservables, given a liberal notion of rationality of belief. In this paper I will investigate to what extent a reassessment of both Popper’s rejection of the rationality of belief and Van Fraassen’s reformulation of the rationality of belief, points towards a new and pragmatist dissolution of the ‘problem of scientific realism’. (shrink)

In many countries consumers have shown an increasing interest to the way in which food products are being produced. This study investigates Chinese consumers’ attitudes towards different pig production systems by means of a conjoint analysis. While there has been a range of studies on Western consumers’ attitudes to various forms of food production, little is known about the level of Chinese consumers’ attitudes. A cross-sectional survey was carried out with 472 participants in 6 Chinese cities. Results indicate that Chinese (...) consumers prefer industrial pig production systems, where traditional pig breeds are raised, over large-scale and small family farms. Farms with maximum attention to food safety, which furthermore can provide lean meat with consistent quality, are also preferred. Imported pig breeds and tasty but variable meat were rejected. A 3-cluster solution found that consumers from cluster 1 focus almost exclusively on the food safety aspect (food safety focused). Consumers from cluster 2 (indifferent) show weak overall attitudes to pig production systems in general. Cluster 3 (industrial production oriented) stands out by being very positive about industrial, large-size farms and consistent quality. From a Chinese consumer’s perspective, the industrial approach seems to represent values such as achievement and evolution, as well as quality and safety, since pig production is moving away from low-cost, low-quality, and low-safety family-scale systems. A complex set of rural and environmental development, quality aspects, and food safety measures are challenges that must be met by the stakeholders of pig production systems in China. (shrink)

What are the landmarks of the cognitive revolution? What are the core topics of modern cognitive science? Where is cognitive science heading to? Leading cognitive scientists--Chomsky, Pylyshyn, Gallistel, and others--examine their own work in relation to one of cognitive science's most influential and polemical figures: Jerry Fodor.

This paper contains an exploratory study of networks of activist groups operating versus firms to impact norms on corporate social responsibility. It providessome initial examinations of using webmetrics to trace activist networks and tactics. We conducted an empirical study of an organization that acts like the proverbial “spider in the web” in activist networks in the Netherlands: SOMO, the Centre for Research on Multinational Corporations. Mapping such an organization, in which networks on several themes related to CSR are coordinated, forms (...) a useful entry point for further research. (shrink)

The paper presents a speculative model for associative memory. It has two layers: the lower layer describes memory of a single cell, the upper layer describes how the work is distributed address-free over a large set of cells. Thinking, consciousness and various features of memory are interpreted in terms of the memory model.

Realism has been a central object of attention among analytical philosophers for some decades. Starting from analytical philosophy, the return of realism has spread into other contemporary philosophical traditions and given birth to new trends in current discussions, as for example in the debates about “new realism.” Discussions about realism focused on linguistic meaning, epistemology, metaphysics, theory of action and ethics. The implications for politics of discussion about realism in action theory and in ethics, however, are not much discussed. This (...) collection includes essay which address from different and complementary points of view the issue of the social and political relevance of philosophical debates on realism. (shrink)

Ethics support services like Moral Case Deliberation intend to support healthcare professionals in ethically difficult situations. To assess outcomes of MCD, the Euro-MCD Instrument has been developed. Field studies to test this instrument are needed and have been conducted, examining important outcomes before MCD participation and experienced outcomes. The current study aimed to describe how participants’ perceive the importance of MCD outcomes after MCD; compare these perceptions with those before MCD participation; and test the factor structure of these outcomes. Swedish, (...) Norwegian and Dutch healthcare professionals rated the importance of outcomes in the Euro-MCD Instrument after four and eight MCDs. Ratings were compared with those before MCD participation using paired and independent samples t-tests. The factor structure was tested using exploratory factor analyses. After 4 and 8 MCDs, 443 respectively 247 respondents completed the instrument. More than 69% rated all MCD outcomes as ‘quite’ or ‘very’ important, especially outcomes from Enhanced Collaboration, Improved Moral Reflexivity and Improved Moral Attitude. Significant differences for 16 outcomes regarding ratings before and after MCD participation were not considered meaningful. Factor analyses suggested three categories, which seemingly resemble the domains Improved Moral Reflexivity, Enhanced Collaboration and a combination of Improved Moral Attitude and Enhanced Emotional Support. After participation in MCDs, respondents confirmed the importance of outcomes in the Euro-MCD Instrument. The question on perceived importance and the categorization of outcomes need reconsideration. The revised instrument will be presented elsewhere, based on all field studies and theoretical reflections. (shrink)

Donors to biobanks are typically asked to give blanket consent, allowing their donation to be used in any research authorized by the biobank. This type of consent ignores the evidence that some donors have moral, religious, or cultural concerns about the future uses of their donations – concerns we call “non-welfare interests”. The nature of non-welfare interests and their effect on willingness to donate to a biobank is not well understood. In order to better undersand the influence of non-welfare interests, (...) we surveyed a national sample of the US population using a probability-based internet panel. Logistic regression models assessed the demographic and attitudinal characteristics associated with participants’ willingness to give consent for unspecified future uses of their donation when presented with 7 research scenarios that raised possible non-welfare interest concerns. Most people had non-welfare interests that significantly affect their willingness to donate to a biobank using blanket consent. Some non-welfare interests are associated with subgroups but others are not. A positive attitude toward biomedical research in general was associated with increased willingness to donate, while concerns about privacy and being African American were associated with decreased willingness. Non-welfare interests matter and can diminish willingness to donate to a biobank. Our data suggest that trust in research promotes willingness to donate. Ignoring non-welfare interests could erode this trust. Donors’ non-welfare interests could be accommodated through greater transparency and easier access to information about the uses of donations. (shrink)