Using covariant derivatives and the operator definitions of quantum mechanics, gauge invariant Proca and Lehnert equations are derived and the Lorenz condition is eliminated in U(1) invariant electrodynamics. It is shown that the structure of the gauge invariant Lehnert equation is the same in an O(3) invariant theory of electrodynamics.

(No abstract is available for this citation).

Joining the ongoing academic debates around medical students’ alternative career choices, this research examines the role of family in medical school attendees’ entrepreneurial intention. Specifically, this study decomposes the multidimensionality of family embeddedness and highlights the mediated nature of the family–EI relationship. The empirical analysis relied on data from graduation year medical students from diverse geographical locations and from different institution types in China. These data were collected from a total of 687 questionnaires covering the basic information of individual, parents, (...) and family composition, as well as the measuring scale of EI. Examining medical students’ EI and its antecedents provide a dual-missing-link in the extant knowledge, i.e., it adds the medical school piece to the overall picture of university students’ EI, and equally important, it de-trivializes entrepreneurship from the extant theorizations of medical students’ career choices. This study also bears implications for educators, practitioners, and policymakers interested in better understanding EI of medical school attendees and family embeddedness. (shrink)

Since its publication in 1965, Brian Barry's seminal work has occupied an important role in the revival of Anglo-American political philosophy. A number of ideas and terms in it have become part of the standard vocabulary, such as the distinction between "ideal-regarding" and "want-regarding" principles and the division of principles into aggregative and distributive. The book provided the first precise analysis of the concept of political values having trade-off relations and its analysis of the notion of the public interest has (...) also been significant. (shrink)

In Part I of this discussion I considered the nature and validity of the principle of respect for persons as distinguished from its practical import and application. Before I proceed to that second topic let me draw together in summary fashion the main points of the view I have put forward.

The objective of this essay is to forge a more explicit link between the “visual turn” and the “practice turn” in entrepreneurship research. Specifically, we explore three key aspects of mobilizing visual methods for studying entrepreneurship-as-practice, i.e., data sources, collection strategies, and analytical perspectives, highlighting the important theoretical and empirical promises that visual methods hold for said research. This essay bears implications for researchers and educators working at the intersection of entrepreneurship research, the practice theory, and visual methods.

There is a touch of foolhardiness in the attempts to establish a precise identification for the great majority of birds mentioned by the authors of classical antiquity. Only a small minority of the ancient references and descriptions contains features which are indisputably diagnostic, while a probably not much bigger minority of the Mediterranean avifauna possesses characteristics of appearance, behaviour, or voice that would have enabled an ordinary Greek or Roman immediately to distinguish a member of one species from absolutely all (...) others, using the sole aids of his eyes, ears, and the largely inaccurate medley of lore handed down from one generation to the next. Thus any modern attempt to pin down the identity of this or that bird in an ancient author is fraught with many dangers and difficulties which must be recognized at the outset. (shrink)

The average educated Greek, I am sure, knew the early history of Greece as well as the average educated European knows the history of modern Europe, and could no more separate Theopompos from the first Messenian War or put Pheidon after Kypselos than we can separate Wellington from Waterloo or make Frederick the Great follow Napoleon. The professional historian, antiquarian, or chronographer would know much more, but could readily distort what he knew in trying to impose some theoretical pattern on (...) the past. Where so many of our sources are theoretical and when they survive in fragments which are rarely substantial enough to show in detail the theory on which they worked, it is not easy to see through to the core of Greek belief on which they were based. But facts there were and in the main it was from them that the theorizing started. (shrink)

Professor Strawson's paper is refreshing in content as well as refreshingly intemperate. It is salutary to be reminded that even the Type Identity Theory does not entail physicalism as that doctrine is usually understood (since c-fiber firings are not by definition purely physical). And it's fun to consider versions of panpsychism. I can see why Strawson finds his position hard to classify (p. 7), and I sympathize. In my title I have cast my own vote for '?-ism' on the grounds (...) that any familiar label would be either misleading or unwieldy. My main purpose here is to assess Strawson's case for panpsychism and then to offer some objections to panpsychism, but first I want to answer an interesting and serious charge he makes against me. (shrink)

W G M Elliott; Ideology and School Mathamatics: Reply to C. P. Ormell, Journal of Philosophy of Education, Volume 3, Issue 1, 30 May 2006, Pages 55–64, https://.

In this lively and provocative book, W. G. Runciman shows where and why they fail, even after due allowance has been made for the different historical contexts in which they wrote.

In Part I of this discussion I considered the nature and validity of the principle of respect for persons as distinguished from its practical import and application. Before I proceed to that second topic let me draw together in summary fashion the main points of the view I have put forward.

Themistokles was ostracized in the late 470's, probably in spring 471 or 470; if we are to believe Thucydides, he did not write to Artaxerxes in Persia until 465 at the earliest. In some way or other his stay in Argos and visits to the rest of the Peloponnese, his wanderings in northern Greece, and his delay in Asia Minor must be extended to fill this gap of at least five years. There is evidence of a sort, there are arguments (...) good and bad for the lengthening or shortening of any of these episodes, but none of this evidence or argument is conclusive. Between 470 and 465 no event in Themistokles' life can be securely dated; there is no fixed chronological pattern into which a reconstruction of the political history of Athens and the Peloponnese during these years must fit. Since the reconstruction which I attempt here is itself based on evidence which is far from adequate, plausibility is the most that can be claimed for it or for the chronological scheme which I infer from it. (shrink)

My discussion of this theme falls into two parts. In the first part, starting from the assumption that we do in fact tend to respond favourably to the idea, vague though it may be, that “persons are to be respected, simply as persons”, I endeavour to clear my mind a little about our warrant for speaking in this way; and to do this is at the same time to clarify in some measure our understanding of what such language means. But (...) of course, since it is the language of practical principle, or precept, there can be no full understanding of its meaning without a grasp of its “working value”, of its significance as a clue to the proper directing and assessing of conduct. The second, and briefer, part of the discussion, accordingly, which is reserved for a subsequent article, is devoted to the question of the practical import of the principle of respect, the sort of guidance that it may provide in the actual business of life. (shrink)