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Search Results: 1 - 10 of 192693 matches for " Harry G Bennett "
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Does a small central Nd:YAG posterior capsulotomy improve peripheral fundal visualisation for the Vitreoretinal surgeon?
Niall Patton, Tariq M Aslam, Harry G Bennett, Baljean Dhillon
BMC Ophthalmology , 2004, DOI: 10.1186/1471-2415-4-8
Abstract: Patients undergoing Nd:YAG capsulotomy for PCO were examined pre- and four weeks post- Nd:YAG capsulotomy. In order to give a quantitative measure of visualisation of the peripheral retina, a novel scalar measurement was developed. Changes in the degree of visualisation following Nd:YAG capsulotomy were calculated.There was a significant improvement in fundal visualisation of the retinal periphery with scleral indentation following Nd:YAG capsulotomy (p = 0.001).Peripheral fundal visualisation with scleral indentation improves following a small central Nd:YAG capsulotomy. This finding is important in relation to the detection of peripheral pseudophakic retinal breaks, particularly in those patients deemed at high risk following Nd:YAG capsulotomy.Posterior capsular opacification (PCO) is the commonest complication of cataract surgery [1]. It has implications not only for the immediate visual function of the patient, but also for the ophthalmologists' diagnostic ability, as PCO may have a significant impact on the ability of the vitreoretinal surgeon to visualise the peripheral fundus. This may be particularly important for patients at risk of retinal detachment.After uneventful extracapsular cataract surgery, Nd:YAG capsulotomy has been shown to increase the risk of developing a retinal detachment [2-11]. Proposed mechanisms include liquefaction of the vitreous[12] and interruption of the anterior hyaloid face[13]. Whilst some authors consider the increased risk to be as a result of opening the capsule and not a specific complication of the laser procedure itself[10,12,14], minimising the energy used to create the capsulotomy is generally considered advisable to minimise the associated risk of retinal detachment[15]. It has been suggested that current practise should be wary of performing Nd:YAG capsulotomy on high risk patients, such as high myopes. However when making this decision, one must also consider that there may be an increased difficulty in fundal visuali
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.7 ppm
G. W. Bennett
Physics , 2002, DOI: 10.1103/PhysRevLett.89.101804
Abstract: A higher precision measurement of the anomalous g value, a_mu = (g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron, based on data collected in the year 2000. The result a_{mu^+} = 11 659 204(7)(5) times 10^{-10} (0.7 ppm) is in good agreement with previous measurements and has an error about one half that of the combined previous data. The present world average experimental value is a_mu(exp) = 11 659 203(8) times 10^{-10} (0.7 ppm).
Measurement of the Negative Muon Anomalous Magnetic Moment to 0.7 ppm
G. W. Bennett
Physics , 2004, DOI: 10.1103/PhysRevLett.92.161802
Abstract: The anomalous magnetic moment of the negative muon has been measured to a precision of 0.7 parts per million (ppm) at the Brookhaven Alternating Gradient Synchrotron. This result is based on data collected in 2001, and is over an order of magnitude more precise than the previous measurement of the negative muon. The result a_mu= 11 659 214(8)(3) \times 10^{-10} (0.7 ppm), where the first uncertainty is statistical and the second is sytematic, is consistend with previous measurements of the anomaly for the positive and negative muon. The average for the muon anomaly a_{mu}(exp) = 11 659 208(6) \times 10^{-10} (0.5ppm).
Review of "The Globalisation Of Addiction: A Study In Poverty Of The Spirit" by Bruce K. Alexander
Harry G Levine
Harm Reduction Journal , 2009, DOI: 10.1186/1477-7517-6-12
Abstract: In a 1970s New Yorker cartoon, a writer at a small desk pecks away on a typewriter. In his thought cloud behind him, fifteen people cheer enthusiastically and say: "A brilliant achievement ... Unflinching ... Writing at its most illuminating ... Explosive ... Long overdue ... True vision ... Plain speech ... Proclaims the failure of our civilization as a whole."The Globalisation of Addiction is that kind of book – and I mean that in the best and most ambitious sense. It earns each of those descriptions from "brilliant" to "proclaims the failure of our civilization." Among the book's major inspirations are works of Erik Erikson, Karl Polanyi, Eric Fromm, Emile Durkheim, Phillip Slater, and certainly Marx and Freud. There is something almost traditionally European about its combination of erudition, ambition, seriousness, and enormous scope. It is the result of a life's work reading, researching and thinking: 470 well-written pages with over a thousand end notes. Like those classic thinkers, Bruce Alexander has focused his attention on a central problem in the modern world, sought to describe it, contextualize it in large social, economic and historical terms, and contribute to seeing the way out.The Globalisation of Addiction's argument often makes surprising turns and explorations – each worth following for its information about the history of Western culture and about the contemporary world. Part of what is disorienting is the book's unusual combination of conventional, North American understandings – including its use of the word "addiction" – and its utterly unconventional and thoroughgoing expansion of such understandings across categories, cultures, and historical epochs. The book's major and secondary arguments are often simultaneously quite familiar and remarkably strange.Alexander, a distinguished professor of psychology in Vancouver, Canada, differentiates four main types of "addiction." But he focuses on one particular meaning of addiction which he defines
?Governem-se vocês mesmos!? democracia e carnificina no norte de Mo?ambique
West,Harry G.;
Análise Social , 2008,
Abstract: the language of power spoken by the inhabitants of the mueda plateau in the course of the neoliberal transformation of mozambican political and economic life is substantially different to the language spoken by democratic reformers, despite the commonalities and internal variations in both languages. in the rift between the languages, the muedans adopt a critical stance towards the current process of democratization, articulating their own vision of how power operates in their world. equivalences which are at first sight paradoxical - such as equating democratic decentralization with abandonment by the state, individual freedom with the collective danger of witchcraft, and democracy with carnage - were ultimately democratic ways of evaluating and criticizing the changes taking place and the ways in which power is used in the new context of neoliberal capitalism.
Governem-se vocês mesmos! democracia e carnificina no norte de Mo ambique
Harry G. West
Análise Social , 2008,
Abstract: A linguagem de poder que os habitantes do planalto de Mueda falaram ao longo da transforma o neoliberal da economia e política mo ambicanas difere substancialmente da linguagem falada pelos reformadores democráticos, apesar dos pontos de convergência e das varia es internas em ambas as linguagens. Na disjun o entre elas, os muedenses relacionaram-se criticamente com o processo de democratiza o em curso, articulando a sua própria vis o acerca do funcionamento do poder no mundo que habitam. Equipara es à primeira vista paradoxais - como entre descentraliza o democrática e abandono por parte do Estado, entre liberdade individual e perigo colectivo de feiti aria, ou entre democracia e carnificina - constituíram, afinal, formas em última instancia democráticas de avalia o e de crítica às transforma es ocorridas e às formas como o poder é exercido no novo contexto de capitalismo neoliberal. The language of power spoken by the inhabitants of the Mueda plateau in the course of the neoliberal transformation of Mozambican political and economic life is substantially different to the language spoken by democratic reformers, despite the commonalities and internal variations in both languages. In the rift between the languages, the Muedans adopt a critical stance towards the current process of democratization, articulating their own vision of how power operates in their world. Equivalences which are at first sight paradoxical - such as equating democratic decentralization with abandonment by the state, individual freedom with the collective danger of witchcraft, and democracy with carnage - were ultimately democratic ways of evaluating and criticizing the changes taking place and the ways in which power is used in the new context of neoliberal capitalism.
Revolución y contrarrevolución en economía. De Lord Keynes a Milton Friedman
Harry G. Johnson
Ciencia Ergo Sum , 2002,
Abstract: Se presenta un análisis retrospectivo acerca de los escenarios básicos que dieron pie a la contrarrevolución monetarista, a partir de ciertas debilidades que fueron identificadas dentro de la teoría de la revolución keynesiana. El análisis de este artículo es de interés general y de actualidad ya que de acuerdo con la lógica histórica de la economía este análisis puede fundamentar la secuencia de revoluciones y contrarrevoluciones, que se requerirán en el futuro para desarrollar una post-contrarrevolución.
Meson Properties in the Quark Model: A Look at Some Outstanding Problems
Harry G. Blundell
Physics , 1996,
Abstract: This thesis examines three problems of the quark model, split between two general areas. The general areas are: 1) models of meson decay ($^3P_0$ and flux-tube breaking), 2) final state interactions (FSI's). The three specific problems are: 1) identification of the $f_4(2220)$ state, 2) determination of the mixing angle between the $K_1(1270)$ and $K_1(1400)$ mesons, 3) examination of FSI's in the reaction $\gamma \gamma \rightarrow \pi \pi$ near threshold. A more complete abstract is included in the thesis.
Assessment of Pseudorange Multipath at Continuous GPS Stations in Mexico  [PDF]
G. Esteban Vázquez, Rick Bennett, Joshua Spinler
Positioning (POS) , 2013, DOI: 10.4236/pos.2013.43025
Abstract: We conducted a study to quantify the amount of pseudorange multipath at continuous Global Positioning System (CGPS) stations in the Mexican territory. These CGPS stations serve as reference stations enabling rapid high-precision three-dimensional positioning capabilities, supporting a number of commercial and public safety applications. We studied CGPS data from a large number of publicly available networks spanning Mexico. These include the RGNA (National Active Geodetic Network) administered by INEGI (National Institute of Statistics and Geography), the PBO network (Plate Boundary Observatory) funded by the National Science Foundation (NSF) and operated by UNAVCO (University NAVstar Consortium), the Southern California Integrated GPS Network (SCIGN), which is a collaboration effort of the United States Geological Survey (USGS), Scripps Institution of Oceanography and the Jet Propulsion Laboratory (JPL), the UNAM network, operated by the National Seismological System (SSN) and the Institute of Geophysics of the National Autonomous University of Mexico (UNAM), the Suominet Geodetic Network (SNG) and the CORS (Continuously Operating Reference Station) network, operated by the Federal Aviation Administration (FAA). We evaluated a total of 53 CGPS stations, where dual-frequency geodetic-grade receivers collected GPS data continuously during the period from 1994 to 2012. Despite carefully selected locations, all GPS stations are, to some extent, affected by the presence of signal multipath. For GPS network users that rely on pseudorange observables, the existence of pseudorange multipath could be a critical source of error depending on the time scale of the application. Thus, to identify the most and the least affected GPS stations, we analyzed the averaged daily root mean square pseudorange multipath variations (MP1-RMS and MP2-RMS) for all feasible satellites tracked by the CGPS networks. We investigated the sources of multipath, including changes associated with hardware replacement (i.e., receiver and antenna type) and receiver firmware upgrades.
Computer Platform Adaptive Interference Cancellation Using Higher-Order Statistics  [PDF]
Qiwei Wang, Mario E. Maga?a, Harry G. Skinner
Circuits and Systems (CS) , 2015, DOI: 10.4236/cs.2015.610021
Abstract: Broadband wireless interference in a computer platform is the result of multiple dynamic electromagnetic emission sources. This interference is non-Gaussian and a receiver design based on the Gaussian assumption will yield suboptimal performance. In fact, it has a double-sided K-distribution and needs to be treated differently in the design process. When dealing with this type of interference in the presence of white Gaussian noise, traditional interference/noise cancellation schemes do not produce satisfactory results. In this paper, we present an interference mitigation method which improves BER performance. We do this by using the cross-cumulant as the criterion of goodness. Specifically, our algorithm is based on higher order statistics (HOS) and is designed to reconstruct and to cancel the interference in a recursive fashion. The algorithm is tested on both BPSK and OFDM communication environments. We compare performance in terms of BER against other cancellation methods.
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