Quantum mechanical measurements on a physical system are represented by observables - Hermitian operators on the state space of the observed system. It is an important question whether all observables may be realized, in principle, as measurements on a physical system. Dirac’s influential text ( [1], page 37) makes the following assertion on the question: The question now presents itself – Can every observable be measured? The answer theoretically is yes. In practice it may be very awkward, or perhaps even (...) beyond the ingenuity of the experimenter, to devise an apparatus which could measure some particular observable, but the theory always allows one to imagine that the measurement can be made. This Letter re-examines the question of whether it is possible, even in principle, to measure every quantum mechanical observable. Unexpectedly, ideas from com-. (shrink)

Covers all the important theories from the period 1250-1400, including "maiores" as well as "minores," and issues in a discussion of Marsilius of Inghen (d. ...

In the opinion of Aristotle and Plutarch the growth of latifundia and consequent decline of the citizen population at Sparta were due to the absence of restrictions on gifts and bequests of land. According to Plutarch this freedom of gift and bequest, so far as it applied to the κλροι or entailed estates, was introduced by the τρα of an ephor named Epitadeus, who removed the ban on gift and bequest imposed by Lycurgus.

The paper intends to objectively review the ecological understanding of Upaniṣhadic ṛṣis. Since ecology is a modern notion, it is required to precisely place it within the Upaniṣhadic thought. For that purpose, a possible ontological structure of Upaniṣhadic philosophy is sorted in which the discussion of ecology becomes meaningful. Upaniṣhadic ṛṣis conceived ecology as a part of their metaphysics, that is, one which is assisted by the devatas. There is a dependent coexistence between Devatas, Humans and the world. This feature (...) of Upaniṣhadic philosophy should not be treated as a declaration for environmental conservation. It is rather seen as a theory of consumption and calibration from both sides. Although ecology is integrated into the Upaniṣhadic metaphysics, it is not one of the subject matters of Upaniṣhads. An understanding of ecology traceable from Upaniṣhads is supplementary to Upaniṣhadic theory of Devatas. Thus, the author concludes that the Upaniṣhadic ecology is metaphysical rather than natural. (shrink)

Tradicionalmente se ha entendido que la mejor teoría de la responsabilidad extracontractual es aquella que mejor explica los rasgos centrales de la práctica. En este sentido, los defensores de las teorías deontológicas, basadas en principios de justicia, han rechazado el poder explicativo del análisis económico del derecho. Han sostenido que no logra reconstruir la práctica dando sentido a sus conceptos centrales, ni al modo en que están relacionados. Por lo tanto, no puede explicar la pauta de inferencias que llevan a (...) un juicio de responsabilidad. En este trabajo me propongo mostrar que ambas teorías son capaces de explicar aspectos diferen- tes de la práctica. En contra de lo que se asume generalmente, el análisis económico del derecho y las teorías deontológicas no son teorías rivales, sino compatibles, puesto que tienen por objeto responder a preguntas distintas. (shrink)

The considerable attention to financial interests in clinical research has focused mostly on academic medical centers, even though the majority of clinical research is conducted in community practice settings. To fill this gap, this article maps the practices and policies in 73 community hospitals and several hundred specialized facilities around the country for reviewing clinical investigators’ financial relationships with research sponsors. Community hospitals face a substantially different mix of issues than academic medical centers do because their physician researchers are usually (...) not employees, and more of their studies are later-phase, multicenter trials. Accordingly, community physicians stand to benefit personally from per capita payments, but they tend to have less direct influence over research findings when compared with their academic peers. These and other contrasts require separate guidance for community-based organizations that takes into account their particular needs, circumstances, and institutional capacities. (shrink)

carrington places race and racism at the center of his densely written analysis of science fiction, fantasy, utopia, and other forms of popular culture. He moves easily between a broad range of forms, which include memoirs, television series, comic books, novels, novelizations, fandom and fanzines, and short fiction and fiction circulated on the Internet. Popular culture helps us to construct notions of identity and race, and for carrington many constituent groups, notably fans, develop its key concepts and values.Speculative fiction is (...) for carrington a framework that links these various forms of popular culture. Here, SF is a genre different from literature, as it is situated closer to, and is more deeply... (shrink)

Originally published in 1939, this volume contains the text of an inaugural lecture delivered by M. M. Postan on his accession to the Professorship of Economic History at the University of Cambridge. This book will be of value to anyone with an interest in economic history or the history of the study of humanities.

In lieu of an abstract, here is a brief excerpt of the content:M. C. Dillon LOVE IN WOMEN IN LOVE: A PHENOMENOLOGICAL ANALYSIS Despite his sexism, his turgid prose, and his antiquated social conscience, Lawrence is on every bookshelf. This is not merely because of the vicarious erotic entertainment to be found in the saga of John Thomas and Lady Jane, but because Lawrence remains a major guru of romance. We take him seriously, look to him for guidance, measure ourselves (...) against Ursula and Birkin. If he is on our shelves—and his thoughts not far from our pillows—then his ideas starid in need of scrutiny. Women in Love is as much a treatise as a novel: we witness more talking about than making of love. The agon of ideas engulfs the agon of flesh. Hence, the book suits the present purpose. It cannot be taken as Lawrence's definitive statement on love—later works, notably Lady Chatterly's Lover, move in different directions—but it is his most philosophical treatment and, I think, most clearly expresses his conceptual framework, the parameters which define and limit his thinking. What he says about love in Women in Love may therefore illumine his depictions of the behavior of lovers in other works. Lawrence is a romantic. In the popular sense of the word he is one who makes of romance or erotic adventure a dominant life value. Lawrence is also a romantic in another sense insofar as he takes the transcendence or unattainability of the other as essential to the project of loving. These two senses are conceptually compatible but existentially in conflict. That is, if one's major undertaking in life is to seek erotic satisfaction, and if one desires only so long as the object is beyond reach, then one has established the groundwork for continual frustration. This, I will try to show, is what Lawrence has done. I Many writers have tried to bring the ideas implicitly present in and constitutive of romantic love to the level of explicit reflective awareness. 190 M.C.Dillon191 The most successful treatment I know is given by a writer who did not know—or at least did not say—that he was writing about romantic love. Sartre purports to reveal the inner structures of love itself—the unqualified, unrestricted essence of love. As I have tried to show elsewhere,1 he fails at this. But he succeeds admirably in unveiling the inner contradictions of romantic love. Our project here is to draw upon Sartre's insights: first, to develop a conception of romantic love, and then to discern the model of Eros which informs Women in Love. The key idea in romantic love is transcendence. Something is transcendent when it is beyond me, when I cannot adequately prehend it conceptually or master it with my will. The role of transcendence in romantic love is demonstrated clearly in Denis de Rougemont's book on Love in the Western World.2 There he shows that Tristan's passion for Iseult is directly proportional to her distance from him: he is increasingly attracted as she becomes further removed. On the other hand, when through various deeds of gallantry and subterfuge, he succeeds in winning her to his side, he loses interest and must create circumstances which put her again beyond his reach. The culmination of romantic love, according to de Rougemont, is death—it sets the other absolutely beyond reach. It also arrests and preserves at their apices the youth and beauty of the lovers and the intensity of the erotic relationship. It is, I believe, this complex of ideas that led Kierkegaard to this cynical reflection on the nature of romantic love: "When two beings fall in love with one another and begin to suspect that they were made for each other, it is time to have the courage to break it off; for by going on they have everything to lose and nothing to gain."3 The same idea, qualified by increased optimism, underlies Stendhal's notion of crystallization in his book On Love.* Love is predicated on the attribution of perfection to the beloved. Just as a plain bough emerges from the salt-saturated waters of the Salzburg mines encrusted with beautiful crystals... (shrink)