107,807 research outputs found

    Uncertainties inherent in the decomposition of a Transformation

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    This contribution adds to the points on the <indeterminacy of special relativity> made by De Abreu and Guerra. We show that the Lorentz Transformation can be composed by the physical observations made in a frame K of events in a frame K-prime viz i) objects in K-prime are moving at a speed v relative to K, ii) distances and time intervals measured by K-prime are at variance with those measured by K and iii) the concept of simultaneity is different in K-prime compared to K. The order in which the composition is executed determines the nature of the middle aspect (ii). This essential uncertainty of the theory can be resolved only by a universal synchronicity as discussed in [1] based on the unique frame in which the one way speed of light is constant in all directions.Comment: 10 pages including an appendix. Published in the European Journal of Physics as a Comment. Eur. J. Phys. 29 (2008) L13-L1

    Understanding the Debate Over Necessity: Unanswered Questions and Future Implications of Annulments in the Argentine Gas Cases

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    This paper analyses possible effects on total employment, and the distribution between agency work and regular contracts as a consequence of the Swedish implementation of the EU Temporary and Agency Workers Directive in a dual labour market Mortensen-Pissarides search model. The directive states that the basic working and employment conditions for agency workers should be equal to those for a comparable employee at the client firm, and that all parties should actively facilitate the transition from agency employment to employment directly at the client firm. Even though the results suggest a negative net effect on total employment, the implementation is shown to have a positive impact on overall welfare, and that an increased transition probability from the agency sector into regular employment would contribute even more

    Gang Innovation, Patriarchy and Powerlessness : Expanding Theory To Relfect [Reflect] American Politics

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    When cities grew large enough to develop slums, gangs began to form. The heritage of gang behavior is poverty and its children: abuse, alcoholism, and drug addiction, to name a few. Today we are facing a problem of major proportions in our cities. Gang membership is seemingly growing with no end in sight, and a beleaguered nation, a struggling city, the mother of a gang member all ask: Why? There are probably several answers and more questions. This paper is an attempt to understand the problem of gang delinquency by utilizing already existing theory. Robert Merton\u27s Strain Theory lends itself to the discussion of gang delinquency; however, this paper will expand on the theory and link it to the powerlessness of young minority males and patriarchal ideology

    Entropy of eternal black holes

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    The entropy of a quantum-statistical system which is classically approximated by a general stationary eternal black hole is studied by means of a microcanonical functional integral. This approach opens the possibility of including explicitly the internal degrees of freedom of a physical black hole in path integral descriptions of its thermodynamical properties. If the functional integral is interpreted as the density of states of the system, the corresponding entropy equals calS=AH/4−AH/4=0{cal S} = A_H/4 - A_H/4 =0 in the semiclassical approximation, where AHA_H is the area of the black hole horizon. The functional integral reflects the properties of a pure state.Comment: To appear in the proceedings of the Sixth Canadian Conference on General Relativiy and Relativistic Astrophysics, 7 pages, Late

    Recognizing the Enemy: Rap Music In the Wake of the Los Angeles Riots

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    The May 1992 riots in Los Angeles demonstrated more than anything in recent history that the inner cities are filled with despair, hopelessness, and anger. Some feel that rap music is responsible for both gangs and the lawlessness unleashed by the riots. This paper will seek to address this notion by looking at the rap lyrics of artists who have been considered the most radical and the most angry. By examining rap lyrics we can detect anger and frustration in the ghetto. Rap music did not cause rioting in Los Angeles but it effectively heralded measures taken by inner-city residents who are tired of governmental and societal neglect of their community, their homes, and their lives

    Puerto Ricans: White or Non- White?

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    The question of race and racial identity among Puerto Ricans has been one of great confusion and misunderstanding. The confusion and misunderstanding exist both among Puerto Ricans and Anglo-Americans. This is a study of the paradox of race perceptions among mainland-bred and island-bred Puerto Ricans. This study was undertaken to look at several related issues: What are the racial perceptions and attitudes held by Puerto Ricans, both on the island and the continental mainland? Further, to what extent has Americanization of Puerto Ricans affected those perceptions and attitudes? Likewise, what role does class consciousness and class mobility play? How do Anglo-American racial perceptions and attitudes affect the Puerto Rican\u27s image of self? And finally, do individual variables such as one\u27s skin color, ethnic identity or pride, personal prejudices or family background further affect these perceptions and attitudes

    Szego polynomials: a view from the Riemann-Hilbert window

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    This is an expanded version of the talk given at the conference ``Constructive Functions Tech-04''. We survey some recent results on canonical representation and asymptotic behavior of polynomials orthogonal on the unit circle with respect to an analytic weight. These results are obtained using the steepest descent method based on the Riemann-Hilbert characterization of these polynomials.Comment: 23 pages, 7 figures; To appear in Elect. Trans. Num. Anal. Apparently, due to some missing .sty file, all integrals in version 2 were gone. Version 3 is a mere correction of this proble
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