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.

ICAP is a theory of active learning that differentiates students’ engagement based on their behaviors. ICAP postulates that Interactive engagement, demonstrated by co‐generative collaborative behaviors, is superior for learning to Constructive engagement, indicated by generative behaviors. Both kinds of engagement exceed the benefits of Active or Passive engagement, marked by manipulative and attentive behaviors, respectively. This paper discusses a 5‐year project that attempted to translate ICAP into a theory of instruction using five successive measures: (a) teachers’ understanding of ICAP after (...) completing an online module, (b) their success at designing lesson plans using different ICAP modes, (c) fidelity of teachers’ classroom implementation, (d) modes of students’ enacted behaviors, and (e) students’ learning outcomes. Although teachers had minimal success in designing Constructive and Interactive activities, students nevertheless learned significantly more in the context of Constructive than Active activities. We discuss reasons for teachers’ overall difficulty in designing and eliciting Interactive engagement. (shrink)

Critics of the organization of industrial work under capitalism have ranged from the “human relations” school to socio‐technical systems theorists and, most vociferously, to advocates of labor process theory (LPT). Their practical influence on management was small as long as production was rolling on and profits rolling in. When competition intensified, however, employers started to question old ideas and, abetted by the needs of new computerized technology, began to broaden jobs, allow workers greater discretion in their performance and involve them (...) in shop floor decision making. LPT, however, has not contributed to this evolution toward more satisfying work. This paper explains why this is so by exploring two major shortcomings of LPT. First and foremost is that LPT has ignored the efficiency of the work process, refusing to acknowledge the legitimacy of a tradeoff between work “goodness” and productivity.As a result, LPT has been unable to propose economically viable alternatives to existing job design and work organization. Second, LPT has identified management's goal in organizing work as gaining control of the process, when, in fact, it has been to make the process as economically efficient as possible. Thus, LPT could not see that, under changed circumstances, management might decentralize control toward the shop floor, if that might promote efficiency. LPT's founder, Harry Braverman, and his disciples believed that it was impossible to reform work under capitalism, but experience shows otherwise. (shrink)

In his article ‘God and Probability’, 1 Hugh Mellor introduced the notion of the ‘bridge-hand fallacy’, allegedly committed by those who think they can appeal to probabilities in arguments for design. I should like to give this notion another airing, partly because of its recent criticism in two interesting books - R. G. Swinburne' The Existence of God and D. J. Bartholomew's God of Chance - and partly because it seems worth asking how it fares in relation to the most (...) recent examples of design argument, namely those which appeal to the so-called ‘anthropic principle’ in cosmology. (shrink)

Does the recent success of Podemos and Syriza herald a new era of inclusive, egalitarian left populism? Because leaders of both parties are former students of Ernesto Laclau and cite his account of populism as guiding their political practice, this essay considers whether his theory supports hope for a new kind of populism. For Laclau, the essence of populism is an “empty signifier” that provides a means by which anyone can identify with the people as a whole. However, the concept (...) of the empty signifier is not as neutral as he assumes. As I show by analyzing the role of race in his theory, some subjects are constituted in a way that prevents their unmediated identification with the people. Consequently, Laclau’s view should be read as symptomatic of the problems with populist logic if its adherents are to avoid reproducing its exclusions and practice a more inclusive politics. (shrink)

B L Curtis; Learning and Intentionality, Journal of Philosophy of Education, Volume 5, Issue 1, 30 May 2006, Pages 105–121, https://doi.org/10.1111/j.1467-9752.

B L Curtis; Learning and Intentionality, Journal of Philosophy of Education, Volume 5, Issue 1, 30 May 2006, Pages 105–121, https://doi.org/10.1111/j.1467-9752.

A comparative study of Zumel's and other scholastic theories concerning the influence of the understanding or reason upon the will.--L. K. B.

There is now a rapidly expanding population of interlinked developmental biology databases on the World Wide Web that can be readily accessed from a desk‐top PC using programs such as Netscape or Mosaic. These databases cover popular organisms (Arabidopsis, Caenorhabditis, Drosophila, zebrafish, mouse, etc.) and include gene and protein sequences, lists of mutants, information on resources and techniques, and teaching aids. More complex are databases relating domains of gene expression to embryonic anatomy and these range from existing text‐based systems for (...) specific organs such as kidney, to a massive project under development, that will cover gene expression during the whole of mouse embryogenesis. In this brief article, we review selected examples of databases currently available, look forward to what will be available soon, and explain how to gain access to the World Wide Web. (shrink)

On August 29, 1995, the United States District Court for the Northern District of Ohio ruled that certain practices of Blue Cross and Blue Shield of Ohio relating to the calculation of copayments on insurance claims violated provisions of ERISA, and thus BCBSO could be liable for unpaid benefits and breach of fiduciary duty ). According to BCBSO's Explanation of Benefits and Schedule of Benefits, beneficiaries were responsible for a 20 percent copayment for hospital charges, and the remaining 80 percent (...) of the Provider's Reasonable Charges would be paid by BCBSO. BCBSO negotiated with the hospitals to create discount agreements whereby the actual charge to BCBSO was less than 80 percent of the total amount of the hospital's charges. By this arrangement, BCBSO paid less than 80 percent of what patients were billed; concurrently, patients paid more than 20 percent of the amount ultimately paid to hospitals for their services. (shrink)