18,676 research outputs found
The Shadow of the Soul Breaker: Solitary Confinement, Cocaine, and the Disintegration of Huey P. Newton
No full textThe article probes the impact of prison on Huey P. Newton, founder of the Black Panther Party. Incarcerated for three years in various locations in California, Newton descended into cocaine addiction and criminality soon after his 1970 release. The current literature fails to account for the impact of solitary confinement on Newton’s life and consequently misinterprets his descent into criminality. The article suggests that the immense pressures placed on Newton in prison and after freedom were related to the decline of the rehabilitative experiment in California’s prison system. It reveals the psychological effect of prison on Newton before linking his fragile mental state to his drug addiction. It concludes by demonstrating how FBI surveillance unwittingly took advantage of Newton’s fragility to compound his psychological stress, indicating the extent to which prison successfully prevented Newton reclaiming his position as a significant force in the African American political struggle
Pseudo-loadflow formulation as a starting process for the Newton Raphson
No full textThis paper introduces new models which approximate the AC loadflow problem, but are able to converge (using the Newton Raphson algorithm) from a wider range of starting points. The solution of the pseudo-loadflow models can provide a robust starting process for the Newton Raphson solution of the conventional loadflow problem. It is also shown that pseudo-loadflow solutions exist in many cases where the AC loadflow equations do not appear to have any solution, and in such cases the pseudo-loadflow solution can provide useful information to assist in locating the cause of infeasibility of the AC loadflow model. Test results are presented for illustrative small network examples and also for larger test networks. The computational requirements of the proposed methods are similar to those of the conventional Newton Raphson loadflow algorithm
Latest results on Jovian disk X-rays from XMM-Newton
No full textWe present the results of a spectral study of the soft X-ray emission (0.2–2.5 keV) from low-latitude (‘disk’) regions of Jupiter. The data were obtained during two observing campaigns with XMM-Newton in April and November 2003. While the level of the emission remained approximately the same between April and the first half of the November observation, the second part of the latter shows an enhancement by about 40% in the 0.2–2.5 keV flux. A very similar, and apparently correlated increase, in time and scale, was observed in the solar X-ray and EUV flux.
The months of October and November 2003 saw a period of particularly intense solar activity, which appears reflected in the behavior of the soft X-rays from Jupiter's disk. The X-ray spectra, from the XMM-Newton EPIC CCD cameras, are all well fitted by a coronal model with temperatures in the range 0.4–0.5 keV, with additional line emission from Mg XI (1.35 keV) and Si XIII (1.86 keV): these are characteristic lines of solar X-ray spectra at maximum activity and during flares.
The XMM-Newton observations lend further support to the theory that Jupiter's disk X-ray emission is controlled by the Sun, and may be produced in large part by scattering, elastic and fluorescent, of solar X-rays in the upper atmosphere of the planet
Métodos de Krylov-Newton aplicados à simulação numérica de reservatórios de petróleo
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.A simulação do processo de extração de óleo em um reservatório de petróleo é um problema complexo que envolve o escoamento multifásico em um meio poroso de geometria arbitrária, podendo conter falhas geológicas e outras irregularidades. A modelagem numérica implícita deste problema requer a solução de um complexo sistema de equações não-lineares que pode ser resolvido de diversas formas, mais ou menos eficientes. A forma mais comum de solução deste sistema emprega o método de linearização de Newton ou alguma de suas variantes. O foco deste trabalho está na análise de uma extensa classe de métodos de Newton conhecidos como métodos de Newton inexatos. Estes métodos empregam um segundo método iterativo na solução da equação linearizada resolvendo-a até uma certa tolerância; daí serem chamados de inexatos. Os métodos inexatos abordados neste trabalho concentram-se na escolha de processos iterativos baseados em métodos de projeção no espaço de Krylov, tais como: GMRES, BICGSTAB, TFQMR. Estes métodos, que formam uma subclasse dos métodos de Newton inexatos, são conhecidos como métodos de Krylov-Newton. São abordados também métodos quase-newtonianos baseados na aproximação da matriz Jacobiana considerando apenas os termos ortogonais da discretização em sistemas curvilíneos não-ortogonais. Vários problemas com diferentes graus de não-ortogonalidade da malha e não-linearidades são resolvidos e comparados usando os diferentes métodos implementados
A. Edward Newton, Author 2
No full textA. Edward Newton was an American author, publisher, and avid book collector. He was born in 1864 and passed away in 1940. (circa 1920s)https://digitalcommons.jsu.edu/lib-ac-histimg/1802/thumbnail.jp
A. Edward Newton, Author 1
No full textA. Edward Newton was an American author, publisher, and avid book collector. He was born in 1864 and passed away in 1940. (circa 1920s)https://digitalcommons.jsu.edu/lib-ac-histimg/1801/thumbnail.jp
Vincent Wright's Orchestra
No full textThis 1939 photograph by W. Newton Turner (1910-1995) shows Vincent Wright's student band. Left to right is Cowan, James, Matrey, Frank MacKay Hughes, Bascom Hunt, R. C. Whitaker, Beck, J. W. Farley, McDevitt, and Hunter V. Wright (director). Turner began teaching as an assistant professor of geology and geography in 1937 and filled a variety of roles before retiring on December 29, 1971 as Vice President of Western Carolina University
Residential development plan, Newton-North Newton, Kansas [1972]
No full textTABLE OF MAPS -- TABLE OF GRAPHS -- TABLE OF TABLES -- INTRODUCTION -- CHAPTER I BACKGROUND INFORMATION AND DATA REQUIREMENTS -- CHAPTER II VACANT LAND AND DETERIORATED HOUSING UNITS NEWTON-NORTH NEWTON -- CHAPTER III THE LINEAR PROGRAMMING APPROACH -- CHAPTER IV DEVELOPMENT OF THE MODEL -- CHAPTER V ANALYSIS OF THE MODEL RESULTS -- CHAPTER VI IMPLEMENTATION OF THE MODEL -- APPENDIX DETAIL MODEL PROCEDURE -- LIST OF MAPS -- LIST OF GRAPHS -- LIST OF TABLES
Hybrid Newton-type method for a class of semismooth equations
No full textIn this paper, we present a hybrid method for the solution of a class of composite semismooth equations encountered frequently in applications. The method is obtained by combining a generalized finite-difference Newton method to an inexpensive direct search method. We prove that, under standard assumptions, the method is globally convergent with a local rate of convergence which is superlinear or quadratic. We report also several numerical results obtained applying the method to suitable reformulations of well-known nonlinear complementarity problem
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