12 research outputs found

    Erratum to: Lung Tissue Damage Caused by Heat Accumulation from Adjacent Laser Application: Surgical Implications (Thoracic and Cardiovascular Surgeon (2014) DOI: 10.1055/s-0034-1389086)

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    It has been brought to the Publisher's attention that the author names "Filippo Lococo" and "Alfredo Cesario" were not listed correctly in the above-mentioned article, published on eFirst on September 5, 2014. DOI of the original article is DOI: 10.1055/s-0034-1389086. The names should be read as "Filippo Lococo" and "Alfredo Cesario" in place of "Lococo Filippo" and "Cesario Alfredo."

    Low Complexity Feature Point Detection and Tracking using CUDA

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    High speed feature point detection and tracking is very demanding for many realtime computer vision applications. In existing work, the commonly used feature point detection algorithms like Harris and KLT (Kanade-Lucas-Tomasi) and feature tracking algorithm (Pyramidal-KLT) were redesigned to increase the performance by reducing the algorithmic complexity, resulting in the Low Complexity Corner detector (LOCOCO) and Robust Low Complexity Feature tracking (RLCT) algorithms. To attain further speedup, this report proposes the implementation of these low complexity detection and tracking algorithms on a massively parallel architecture of the modern graphics processing units (GPUs) using Compute Unified Device Architecture (CUDA). In the computing domain, due to semiconductor scaling limits and associated power and thermal challenges, combined with the difficulty of exploiting greater levels of instruction level parallelism, a paradigm shift is happening from a single core to many-core processors and massively multi-processing platforms. High performance is now available on single-chip commodity GPUs. Moreover, GPUs are no longer limited to graphics applications, but are emerging as usable general purpose computing devices. Advancement in such platforms, are making many computational intensive problems that were solvable only on supercomputing systems, to be computed on desktop systems, at a reduced price, and lower power requirements. The arrival of this new generation of low-cost high performance computing platforms presents both numerous opportunities and challenges. In this report, we present the use of such high performance many-core GPU platforms to obtain speedup by mapping general purpose computations to massively parallel architectures. It is observed, when properly executed, GPU adaptation of algorithms can result in significant savings in computation times. For an image size of 960x960 pixels, the low complexity corner detector and robust low complexity feature tracking algorithms are factor of 16 and 25 times faster on a GeForce 280 GTX GPU than the corresponding implementation on an Intel Core 2 Duo, 2.66 GHz, and 2GB RAM CPU.Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc

    6. Performing Organization Code 7. Authors

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    Traffic Safety Administration, in the interest of information exchange. The opinions, findings and conclusions expressed in this publication are those of the author(s) and not necessarily those of the Department of Transportation or the National Highway Traffic Safety Administration. The United States Government assumes no liability for its content or use thereof. If trade or manufacturers ’ names or products are mentioned, it is because they are considered essential to the object of the publication and should not be construed as an endorsement. The United States Government does not endorse products or manufacturers. 1. Report No. DOT HS 809 671 2. Government Accession No. 3. Recipient's Catalog No

    On the Art of the Saiva Temple Banteay Srei: Its Stylistic Position in the Art History of Cambodia

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    In March this year, on his way back from a research trip to India, the author had an opportunity of visiting Banteay Srei, a Śaiva temple situated alone in a jungle 21km. northeast of Angkor Thom. Though small in scale this temple is significant in the classical period of Cambodian art history as the place where a unique type of art was developed. After the publication of the monograph “Le temple d’Īçvarapura” in 1926 there have been reconstruction of the original buildings of the temple and discovery of previously unknown sources of information, and studies on the age and style of Banteay Srei art have seen progress. But it is surprise to find a recently published book (written in English) on Indian art and architecture still including statements on the temple which are based upon out-of-date chronology. The author therefore introduces herein to Japanese students, through his own observation as well as through reference to previous studies by French scholars, the outline of the unique art at Banteay Srei illustrated by photographs taken by himself, focusing his discussion on the position which Banteay Srei art holds in ihe history of Cambodian art. The central and most important buildings of Banteay Srei were formerly considered, based upon the interpretation of numerous inscriptions that had been dicsovered, to have been constructed (or reconstructed) in 1304 A. D., but studies on other important inscriptions discovered thereafter have led to the theory, which is now generally accepted, that the temple was founded in 967 A. D. and that its buildings were all finished by about 1000 A. D. However, as is suggested by the fact that Banteay Srei art was once misunderstood by a certain scholar to be a “Lococo phase” of the last part of the classical period, it gives, at a glance, an impression of stylistic floridness; it should therefore be carefully studied whether the above-mentioned dating is applicable, from a stylistic point of view, to all fields of its architecture, ornamentation and sculpture. French scholars—of whom M. H. Parmentier on architecture, Mme G. de Coral Rémusat on ornamentation as well as on the style of Banteay Srei art in general, and M. J. Boisselier on the stylistic analysis of sculpture, are worth special mention- have achieved notable progress in detailed analysis of the various styles of Khmer art, and they universally agree that the style of Banteay Srei should be dated to the late tenth century. The present author, in support of their theory, discusses that Banteay Srei art contains much of stylistic tradition carried on from ninth-century art, and is rich especially in “archaisant” elements; and he emphasizes that it does not show any tendency for “degeneration” of style indicative of the last period of classical age, but in stead is full of fresh, vivid effect; and that it reveals a new creation of artistic representation. After discussing on the disposition of the buildings and on the motifs and style of their brilliant decoration, the author gives descriptions of the bas-reliefs illustrating stories, the relief images of gods and goddesses (dvārapāla and devatā) and the full-sculptured images. He emphasizes especially the fascinating harmonious portrayal of the goddesses (devatā), and the unique new style of Banteay Srei art represented by it. The author takes this opportunity to express his sincerest gratitude to M. Louis Content and M. Henry Dufour of the Conservation who kindly guided him at his visit to Banteay Srei as well as to the sites in and around Angkor Thom.journal articl

    THE effects of ageing on driving related performance

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    According to one estimate, about 40 percent of the driving population will be over the age of 60by the year 2020 in the UK and currently, several hundred thousand drivers with dementia holddriving licenses. The number of motor vehicle crashes per unit distance of automobile travel is“U”-shaped, with risk increasing slightly between the ages of 55 and 60, but risk increasing witheach successive five-year interval. Some individuals who have mild dementia possess sufficientdriving skills to be designated as fit drivers. The most challenging assessment and decision for thephysician/licensing authority as regards fitness to drive lies in drivers who are questionablydemented or are in a state of very mild dementia.In the absence of a reliable standard protocol, some clinicians make judgment based on selfreporting,which has risks associated with it as lack of insight and judgment are potential commontraits of the population experiencing cognitive decline. Seldom is recourse made by healthprofessionals to on-road assessment as a first alternative as it requires a fee and such testingcenters are not readily available everywhere. This research addresses this issue of theidentification of cognitive tests that can be used to assess an individual’s ability to drive andespecially of those individuals that are questionably demented and are the most difficult toidentify. A younger and an older group consisting of 56 drivers in total were administered ninedifferent cognitive tests and two drives (Drive-I and Drive-II) on the STISIM driving simulator.The cognitive test ufov3 (involving the identification of a central target and simultaneously theradial localization of a peripheral target embedded in distracter triangles), which is the thirdsubtest of the UFOV (Useful Field of View) test showed the highest discriminating ability inseparating “poor-drivers” from “not-poor-drivers”, with 92.86 % of the drivers correctlyclassified. The next best discriminating ability in decreasing order of strength was that of dichoticlistening test, trail making test, rey-copy test and paper folding test. Also, age was found to be anexcellent discriminator of “poor-drivers” and “not-poor-drivers” with 91.07 % of the driverscorrectly classified. A composite cognitive measure consisting of the sum of all nine cognitivetests was not a better predictor than the ufov3 test alone; overall it was still an excellentdiscriminator, classifying 89.29 % of drivers correctly. The commonly recommended ClockDrawing test and the Trail Making test did not emerge as significant predictors of driving ability.A general driving skills linear model for prediction purposes was derived that explained 59 % ofthe variation in a general driving performance index with the ufov3 test, the dichotic listening testand the rey-recall test as significant predictors. Recommendations are made as to how this testshould be used to screen potentially at risk drivers
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