Medical imaging is predominantly a visual field. In this context, prenatal ultrasound images assume intense social, ethical, and psychological significance by virtue of the subject they represent: the fetus. This feature, along with the sophistication introduced by three-dimensional ultrasound imaging that allows improved visualization of the fetus, has contributed to the common impression that prenatal ultrasound scans are like photographs of the fetus. In this article we discuss the consistency of such a comparison. First, we investigate the epistemic role of (...) both analogic and digital photographic images as visual information-providing representations holding a high degree of objectivity. Second, we examine the structure and process of production of ultrasound scans and argue that a comparison between two-dimensional ultrasound and photography is justified. This is in contrast to 3D ultrasound images that, due to the intensive mathematical processing involved in their production, present some structural issues that obfuscate their ontological and epistemic status. (shrink)

The methodology of Latin American economic structuralism has been generally interpreted as an implicit extension of classic French structuralism of Claude Lévi-Strauss and others, without careful examination of the methodological pronouncements of Latin American economists and social scientists. The present paper provides a detailed treatment of how Latin American structuralist methodology was formed between the 1950s and 1970s, with emphasis on Celso Furtado's views. Furtado was influenced by both C. Lévi-Strauss's and F. Braudel's apparently incompatible approaches to structure and (...) history. Furtado's suggested combination of structure and history was based on the use of economic models to interpret successive historical structures, plus the development of the notion of creativity as a link between structures and processes. It differed in some important aspects from the ‘historical-structural method’ usually associated with other Latin American authors such as Sunkel, and Cardoso and Faletto, built on ex.. (shrink)

F. C. Copleston; XIV*—The Logical Empiricism of Nicholas of Autrecourt, Proceedings of the Aristotelian Society, Volume 74, Issue 1, 1 June 1974, Pages 249–262.

The object of this paper is to show that, in the sixth and fifth centuries B.C., two different and radically opposed systems of thought were elaborated within the Pythagorean school. They may be called respectively the mystical system and the scientific. All current accounts of Pythagoreanism known to me attempt to combine the traits of both systems in one composite picture, which naturally fails to hold together. The confusion goes back to Aristotle, who usually speaks indiscriminately of ‘the Pythagoreans,’ though (...) now and then the phrase ‘some Pythagoreans’ indicates that he was aware of different currents within the school. (shrink)

The object of this paper is to show that, in the sixth and fifth centuries B.C., two different and radically opposed systems of thought were elaborated within the Pythagorean school. They may be called respectively the mystical system and the scientific. All current accounts of Pythagoreanism known to me attempt to combine the traits of both systems in one composite picture, which naturally fails to hold together. The confusion goes back to Aristotle, who usually speaks indiscriminately of ‘the Pythagoreans,’ though (...) now and then the phrase ‘some Pythagoreans’ indicates that he was aware of different currents within the school. (shrink)

Zeller argued that the ‘innumerable worlds’ mentioned in accounts of Anaximander's system must be an endless succession of single worlds, not an unlimited number of coexistent worlds scattered through infinite space, some always coming into being while others are passing away. Zeller pointed out that a succession of single worlds is grounded in the principles of the system. ‘Things perish into that from which they had their birth… according to the order of Time,’ a cycle of birth, existence, and destruction. (...) A world ends, and the living divine stuff begets a new world to take its place. On the other hand, there is much in the system to contradict the idea of coexistent worlds. Anaximander's successors, Anaximenes, Anaxagoras, and Diogenes, show that this idea is not a necessary consequence of the unlimitedness of the original world-stuff. Nothing in the appearances of Nature suggests it. Anaximander is a monistic hylozoist, whereas Democritus is a pluralist with his innumerable independent atoms producing, by similar processes, independent world-systems in different parts of an infinite void. (shrink)

Zeller argued that the ‘innumerable worlds’ mentioned in accounts of Anaximander's system must be an endless succession of single worlds, not an unlimited number of coexistent worlds scattered through infinite space, some always coming into being while others are passing away. Zeller pointed out that a succession of single worlds is grounded in the principles of the system. ‘Things perish into that from which they had their birth… according to the order of Time,’ a cycle of birth, existence, and destruction. (...) A world ends, and the living divine stuff begets a new world to take its place. On the other hand, there is much in the system to contradict the idea of coexistent worlds. Anaximander's successors, Anaximenes, Anaxagoras, and Diogenes, show that this idea is not a necessary consequence of the unlimitedness of the original world-stuff. Nothing in the appearances of Nature suggests it. Anaximander is a monistic hylozoist, whereas Democritus is a pluralist with his innumerable independent atoms producing, by similar processes, independent world-systems in different parts of an infinite void. (shrink)

We can now approach the interpretation of the famous symbol called the Tetractys or Tetrad, which is a compendium of Pythagorean mysticism. The tetractys is itself a system of numbers. It symbolizes the ‘elements of number,’ which are the elements of all things. It contains the concordant ratios of the musical harmony. It might well be described in the Pythagorean oath as ‘containing the root and fountain of everflowing Nature.’ In one of the acousmata preserved in Iamblichus it is identified (...) with the cosmic harmony. It was also called κσμος, ορανς, πν. Theon says it was held in honour because it contained the nature of the universe. (shrink)

Anaxagoras’ theory of matter offers a problem which, in bald outline, may be stated as follows. The theory rests on two propositions which seem flatly to contradict one another. One is the principle of Homoeomereity: A natural substance such as a piece of gold, consists solely of parts which are like the whole and like one another—every one of them gold and nothing else. The other is: ‘There is a portion of everything in everything’, understood to mean that a piece (...) of gold , so far from containing nothing but gold, contains portions of every other substance in the world. Unless Anaxagoras was extremely muddleheaded, he cannot have propounded a theory which simply consists of this contradiction. One or the other proposition must be reinterpreted so as to bring them into harmony. Some critics attack one, some the other; some try to modify both. Mr. C. Bailey has recently published a fresh attempt to reconstruct the theory in a form consistent with itself. But the result, as he admits, is arbitrary and uneconomical. These defects, like all the contradictions and obscurities found in other accounts of the system, can be traced to the second proposition: ‘There is a portion of everything in everything’, or rather to the construction put upon it. The language is crude, vague, and ambiguous. What does ‘everything’ mean? Has the first ‘everything’ the same sense as the second ? If taken to mean that there is a portion of every material substance in every material substance, the proposition leads to a result for which ‘uneconomical’ is an indulgent epithet. (shrink)

The object of this paper is to determine the relations between the two parts of Parmenides' poem: the Way of Truth, which deduces the necessary properties of a One Being, and the False Way, which contains a cosmogony based on ‘what seems to mortals, in which there is no true belief.’.

The globalization in business and tourism becomes crucial more and more for the economical sustainability of local communities. In the presence of an epidemic outbreak, there must be such a decision on the policy by the host community as whether to accept visitors or not, the number of acceptable visitors, or the condition for acceptable visitors. Making use of an SIRI type of mathematical model, we consider the influence of visitors on the spread of a reinfectious disease in a community, (...) especially assuming that a certain proportion of accepted visitors are immune. The reinfectivity of disease here means that the immunity gained by either vaccination or recovery is imperfect. With the mathematical results obtained by our analysis on the model for such an epidemic dynamics of resident and visitor populations, we find that the acceptance of visitors could have a significant influence on the disease’s endemicity in the community, either suppressive or supportive. (shrink)

OBJECTIVE: To ascertain attitudes to different methods of obtaining informed consent for randomised clinical trials (RCTs). DESIGN: Structured interviews with members of the public, medical secretaries and medical students. SETTING: The public were approached in a variety of public places. Medical secretaries and students were approached in their place of work. SUBJECTS: Fifty members of the public, 25 secretaries and 25 students. MAIN OUTCOME MEASURES: Views on RCTs were elicited, with particular emphasis on how subjects thought the concept of randomisation (...) should be explained. Each participant was presented with descriptions of proposed clinical trials and asked to select his or her preference from a range of options. RESULTS: Written information was preferred over verbal information in 91% of replies. Most respondents (86%) would prefer to sign a consent form. Of the seven statements explaining randomisation, a significant difference was found in favour of explanations that were less explicit about the play of chance (ANOVA; p = 0.0004). Eighty-three per cent of participants thought that randomised trials were morally acceptable when there was no prior medical preference between treatments. However, over half (55%) thought they would find it upsetting to be offered entry in such a trial and a quarter thought the outcome of treatment might be adversely affected. CONCLUSIONS: Our results offer some support for the idea that "economy with truth" is less unsettling than a frank description of the stark reality of what randomisation means. It is a matter of debate as to whether, if we are correct, autonomy should have precedence over beneficence. The offer of entry in a clinical trial is likely to affect the experience of care for many people, especially if the process of randomisation is described explicitly. Potential participants should be given a detailed written explanation of the rationale for the trial and be asked to sign a consent form if they agree to take part. (shrink)

The earlier part of this paper yielded the result that the assertion ‘A portion of everything in everything’ has no place or function in the explanation of any sort of apparent ‘becoming’ or change. This conclusion is important because, ever since Aristotle, it has been assumed that the assertion was made in order to explain away becoming and change. But if , according to the best evidence, becoming and such sorts of change as Anaxagoras considered can be explained away without (...) using the assertion at all, it follows that the motive for it must be sought, not in the processes of apparent becoming and change, but in the permanent constitution of the ungenerated and unchanging things which figure as elements in the system. A visible mass of gold or of flesh is formed by the aggregation of smaller particles of gold or of flesh, and it is infinitely divisible into parts, every one of which is gold or flesh. But what is the constitution of a piece of gold of whatever size, and how does it differ from the constitution of a piece of flesh? The proposition we have so far successfully excluded comes in here as part of the answer to this question. (shrink)

The object of this paper is to determine the relations between the two parts of Parmenides' poem: the Way of Truth, which deduces the necessary properties of a One Being, and the False Way, which contains a cosmogony based on ‘what seems to mortals, in which there is no true belief.’.

Background A morally sound framework for benefit-sharing is crucial to minimize research exploitation for research conducted in developing countries. However, in practice, it remains uncertain which stakeholders should be involved in the decision-making process regarding benefit-sharing and what the implications might be. Therefore the study aimed to empirically propose a framework for benefit-sharing negotiations in research by taking HIV vaccine trials as a case. Methods The study was conducted in Tanzania using a case study design and qualitative approaches. Data were (...) collected using in-depth interviews (IDI) and focus group discussions (FGD). A total of 37 study participants were selected purposively comprising institutional review board (IRB) members, researchers, community advisory board (CAB) members, a policymaker, and HIV/AIDS advocates. Deductive and inductive thematic analysis approaches were deployed to analyze collected data with the aid of MAXQDA version 20.4.0 software. Results The findings indicate a triangular relationship between the research community, researched community and intermediaries. However, the relationship ought to take into consideration the timing of negotiations, the level of understanding between parties and the phase of the clinical trial. The proposed framework operationalize partnership interactions in community-based participatory research. Conclusion In the context of this study, the suggested framework incorporates the research community, the community being researched, and intermediary parties. The framework would guarantee well-informed and inclusive decision-making regarding benefit-sharing in HIV vaccine trials and other health-related research conducted in resource-limited settings. (shrink)

This paper explains how to use a new software tool for argument diagramming available free on the Internet, showing especially how it can be used in the classroom to enhance critical thinking in philosophy. The user loads a text file containing an argument into a box on the computer interface, and then creates an argument diagram by dragging lines from one node to another. A key feature is the support for argumentation schemes, common patterns of defeasible reasoning historically know as (...) topics . Several examples are presented, as well as the results of an experiment in using the system with students in a university classroom. (shrink)

That three of them were popularly regarded as correlated with the three ages of human life; that the structure of early Greek societies, as of other primitive societies, was based on the distinction of three main age-grades, of which the three virtues are characteristic; that Plato's own Ideal State has the same age basis underlying the other features peculiar to it, and is indeed transparently modelled on the Spartan constitution; that it is therefore probable that Plato started with the three (...) divisions of his State and their several virtues, and then, proceeding on the assumption that the ‘natural’ State must reflect on a large scale the constitution of the individual ‘nature,’ arranged the structure of the soul to correspond with his polity. (shrink)

That three of them were popularly regarded as correlated with the three ages of human life; that the structure of early Greek societies, as of other primitive societies, was based on the distinction of three main age-grades, of which the three virtues are characteristic; that Plato's own Ideal State has the same age basis underlying the other features peculiar to it, and is indeed transparently modelled on the Spartan constitution; that it is therefore probable that Plato started with the three (...) divisions of his State and their several virtues, and then, proceeding on the assumption that the ‘natural’ State must reflect on a large scale the constitution of the individual ‘nature,’ arranged the structure of the soul to correspond with his polity. (shrink)

This study examines the outcomes of a four-year faculty learning community (FLC) that aimed to transform departmental ethics curriculum by supporting Earth Sciences faculty members as they ethically inquired into their teaching of ethics and refined existing courses in alignment with an Integrated Community-Engaged Learning and Ethical Reflection (ICELER) framework. We present ethnographic case studies that unpack processes through which three faculty members transformed undergraduate courses. We assembled case studies by triangulating interview data, course artifacts, and faculty reflections. We examine (...) how faculty (1) built awareness around teaching ethics, (2) took responsibility for and made judgments about teaching ethics, (3) experimented by designing and implementing ICELER-inspired courses, and (4) interrogated the outcomes of their ethics teaching, utilizing findings to enhance awareness and revise courses. The paper closes by introducing a model detailing how instructors inquire into ethics teaching and how model components might inspire future educational practice and research. (shrink)

Stemming from our energy localization hypothesis that energy in general relativity is localized in the regions of the energy-momentum tensor, we had devised a test with the classic Eddington spinning rod. Consistent with the localization hypothesis, we found that the Tolman energy integral did not change in the course of the motion. This implied that gravitational waves do not carry energy in vacuum, bringing into question the demand for the quantization of gravity. Also if information is conveyed by the waves, (...) the traditional view that information transfer demands energy is challenged. Later, we showed that the “body” angular momentum changed at a rate indicating that the moment of inertia increased to higher order, contrary to traditional expectations. We consider the challenges facing the development of a localized expression for the total angular momentum of the body including the contribution from gravity. We find that Komar's expression does not lead to an adequate formulation of localized angular momentum. (shrink)

The issue of energy and its potential localizability in general relativity has challenged physicists for more than a century. Many non-invariant measures were proposed over the years but an invariant measure was never found. We discovered the invariant localized energy measure by expanding the domain of investigation from space to spacetime. We note from relativity that the finiteness of the velocity of propagation of interactions necessarily induces indefiniteness in measurements. This is because the elements of actual physical systems being measured (...) as well as their detectors are characterized by entire four-velocity fields, which necessarily leads to information from a measured system being processed by the detector in a spread of time. General relativity adds additional indefiniteness because of the variation in proper time between elements. The uncertainty is encapsulated in a generalized uncertainty principle, in parallel with that of Heisenberg, which incorporates the localized contribution of gravity to energy. This naturally leads to a generalized uncertainty principle for momentum as well. These generalized forms and the gravitational contribution to localized energy would be expected to be of particular importance in the regimes of ultra-strong gravitational fields. We contrast our invariant spacetime energy measure with the standard 3-space energy measure which is familiar from special relativity, appreciating why general relativity demands a measure in spacetime as opposed to 3-space. We illustrate the misconceptions by certain authors of our approach. (shrink)

È possibile rendere compiutamente conto di ciò che gli artefatti e le tecnologie fanno, senza per questo sminuire il ruolo dell’agentività umana, ossia la capacità dell’essere umano di essere all’origine dell’azione e del senso?Per quanto determinismo tecnologico e sociocostruzionismo siano ormai approcci sufficientemente integrati, sembra quasi impossibile poter riconoscere l’uno senza pagare nulla di più che un piccolo contributo all’altro.Gli autori sottolineano quanto questa cesura che apparentemente riguarda un fenomeno circoscritto e settoriale come il ruolo degli artefatti nella costruzione del (...) mondo sociale, rispecchia in qualche modo l’antica distinzione proposta da Dilthey tra scienze della natura e scienze dello spirito. Il fatto é che tale divisione del lavoro scientifico sembra il risultato più che il punto di partenza di un lavoro deliberato di purificazione dei due domini . Per quanto utile da un punto di vista epistemologico, essa corre costantemente il rischio di proclamare a priori l’incapacità di alcune metodologie di indagare oggetti che si situerebbero al di là della loro giurisdizione . Inoltre, gli autori ritengono che questa distinzione sia alquanto problematica quando si tratta di questioni ontologiche. In linea con il pensiero di filosofi come Whithead , Delueze e Guatatri e Tarde , sostengono che tanto l’approccio sociocostruzionista quanto l’approccio tecno-determinista soffrano di un simile riduzionismo ontologico: ridurre l’oggetto di indagine a quanto la prospettiva inscritta in ciascuna metodologia consente di vedere e di analizzare.Prendendo le distanze da tale riduzionismo, questo articolo intende dimostrare che la materialità, la tecnologia e persino la natura intrudono costantemente nel mondo del significato, della comunicazione, del discorso. Allo stesso tempo, cultura e significato conferiscono senso e persino forma al mondo naturale . A fronte della propensione diffusa a pensare l’interazione come qualcosa che riguarda soltanto gli essere umani, gli autori mostrano che altre cose si autoconvocano costantemente nelle nostre conversazioni e che é legittimo ipotizzare che tali cose facciano «cose con le parole», per usare la famosa espressione che John Langshaw Austin coniò per indicare ciò che le persone fanno attraverso i loro atti linguistici.Attraverso un esempio tratto dalle osservazioni sul campo in un presidio medico d’urgenza operato da Medici senza Frontiere, gli autori mostrano che il sottolineare quanto e come le cose siano partecipanti attivi in una conversazione non significa evacuare il contributo umano all’attività di parola. Se le cose fanno cose con le parole é perché portano prospettivamente le persone a dire quel che dicono e, retrospettivamente, a far dire loro quel che hanno detto. Piuttosto che postulare che i soli partecipanti umani siano all’origine di quanto vien detto durante una conversazione, diventa possibile ritracciare altre origini o elementi che influenzano e condizionano ciò che le persone fanno mentre parlano tra loro.Il fatto che gli oggetti siano spesso trasformati dalla loro stessa incursione sulla scena interattiva viene vista come una prova della « realtà » del loro contributo alla conversazione. Utilizzando la metafora del ventriloquismo, gli autori mostrano che se i partecipanti umani fanno sì che le cose facciano cose con le parole, ciò é anche dovuto al fatto che le cose stesse fanno far loro cose con le parole, in quella sorta di oscillazione ventriloqua già sottolineata da David Goldbaltt . Individuare le tracce sia dell’agentività umana sia dell’agentività tecnologica, porta a riconoscere il grado di passività o passione inerente a qualunque attività o azione. Tale riconoscimento é cruciale dal momento che tale passività fa parte dei modi con cui le persone rendono razionale/giustificabile/legittimabile/ sanzionabile ciò che esse fanno e dicono nel corso di una interazione.Invece di ridurre l’interazione ad un fenomeno che riguarda esseri umani tra loro, appare più costruttivo riconoscere tutte le figure che popolano la scena interattiva, siano esse tecnologie, regolamenti, principi, emozioni o artefatti. La proposta avanzata dagli autori può dunque essere vista come un tentativo di riabilitare metaforicamente l’analisi del parlare prendendo seriamente in considerazione ciò che le figure letteralmente hanno da dire su come noi, gli umani, comunichiamo e lavoriamo.Se poiesis significa fabbricazione, allora forse poesia può diventare un modo innovativo di comprendere come funzionano le tecnologie e come noi interagiamo con esse.While we tend to think of interaction as involving human beings only, this paper proposes to show that other things – technologies, in particular – are continuously inviting themselves in our conversations and that these things can even be said to “do things with words.” Using the metaphor of ventriloquism, we show that if human participants make things do things with words, it is also because things animate them, a form of ventriloqual vacillation or oscillation already noticed by David Goldblatt . Acknowledging both human and technological agencies therefore leads us to recognize the degree of passivity or passion that is inherent in any activity or action, a recognition that is especially important given that its marks the accountable / reasonable / intelligible / justifiable / sanctionable character of what people do and say in interaction. (shrink)

This paper consists of three main parts. First, we give an introduction to Hill’s assumption A (n) and to theory of interval probability, and an overview of recently developed theory and methods for nonparametric predictive inference (NPI), which is based on A (n) and uses interval probability to quantify uncertainty. Thereafter, we illustrate NPI by introducing a variation to the assumption A (n), suitable for inference based on circular data, with applications to several data sets from the literature. This includes (...) attention to comparison of two groups of circular data, and to grouped data. We briefly discuss such inference for multiple future observations. We end the paper with a discussion of NPI and objective Bayesianism. (shrink)

The problem of energy and its localization in general relativity is critically re-examined. The Tolman energy integral for the Eddington spinning rod is analyzed in detail and evaluated apart from a single term. It is shown that a higher order iteration is required to find its value. Details of techniques to solve mathematically challenging problems of motion with powerful computing resources are provided. The next phase of following a system from static to dynamic to final quasi-static state is described.