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Search Results: 1 - 10 of 393 matches for " Lior Merom "
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Low Friction Traction for Cervical Spine Dislocation  [PDF]
Lior Merom, Michael Soudry, Nahum Rosenberg
Open Journal of Clinical Diagnostics (OJCD) , 2015, DOI: 10.4236/ojcd.2015.53019
Abstract: In order to reduce the magnitude of the force applied to skull for treatment of acute cervical spine dislocation, we developed a method of skeletal traction based on reduction of friction forces under the patient’s head. Traction force was applied to sculls of five patients with cervical fracture-dislocations. A difference in friction interface between the patient’s head and shoulder girdle was created. The traction weight required for the reduction of the vertebral dislocation was significantly lower than an expected minimal traction weight in the commonly used techniques (p = 0.013). The presented method permits an effective and safe reduction of dislocated cervical vertebra by a relatively low traction force.
Unsupervised Detection of Outlier Images Using Multi-Order Image Transforms
Lior Shamir
Theory and Applications of Mathematics & Computer Science , 2013,
Abstract: The task of unsupervised detection of peculiar images has immediate applications to numerous scientific disciplines such as astronomy and biology. Here we describe a simple non-parametric method that uses multi-order image transforms for the purpose of automatic unsupervised detection of peculiar images in image datasets. The method is based on computing a large set of image features from the raw pixels and the first and second order of several combinations of image transforms. Then, the features are assigned weights based on their variance, and the peculiarity of each image is determined by its weighted Euclidean distance from the centroid such that the weights are computed from the variance. Experimental results show that features extracted from multi-order image transforms can be used to automatically detect peculiar images in an unsupervised fashion in different image datasets, including faces, paintings, microscopy images, and more, and can be used to find uncommon or peculiar images in large datasets in cases where the target image of interest is not known. The performance of the method is superior to general methods such as one-class SVM. Source code and data used in this paper are publicly available, and can be used as a benchmark to develop and compare the performance of algorithms for unsupervised detection of peculiar images.
Cybercrime: A National Security Issue?
Lior Tabansky
Military and Strategic Affairs , 2012,
Abstract: Cyberspace, an offshoot of the development of computer and digital communications technologies, has in recent decades become part and parcel of our lives. The implications of cyberspace crime for national security derive from the way technology is used by hostile elements. This article proposes a policy directed examination of the meaning of cyberspace crime and its impact on national security, without focusing on the widespread monetary assessments of the damage caused by cybercrime. It includes a pro le of cooperation among criminals, organized crime, and hostile organizations, and discusses the commercialization of cyber reconnaissance and cyber attack capabilities, made possible by ever-developing technologies and the growth of a black market in IT services. Currently, cybercrime is hardly signi cant beyond the realms of IT risk management and law enforcement. However, this article identi es two separate conditions where cybercrime could become a substantial threat to national security
Critical Infrastructure Protection against Cyber Threats
Lior Tabansky
Military and Strategic Affairs , 2011,
Abstract: A functioning modern society depends on a complex tapestry of infrastructures: energy, communications, transportation, food, and many others. This article discusses the developing cyber threat to critical infrastructure while focusing on several dimensions: aspects to the threat that require an interdisciplinary approach; defense against the threat; the existing Israeli response; and the developing challenges. An informed public debate is likely to lead to improved protection of national infrastructures in the civilian and public sectors.The article begins by de ning the subject of critical infrastructures, and discusses the origins, uniqueness, and innovativeness of the threat to them. It then discusses levels of coping with the threat, using conceptual parallels to the world of military content. The existing Israeli response will be reviewed brie y, with an emphasis on the central challenges the cyber threat poses to public policy. Finally, directions for future research and action will be presented.
Basic Concepts in Cyber Warfare
Lior Tabansky
Military and Strategic Affairs , 2011,
Abstract: Developments in computers have made possible far reaching changes in all areas of life, and the rapid progress in computing, communications, and software has led to a dramatic reduction in the cost of producing, processing, and disseminating information. Information technologies continue to develop at an accelerated pace, and a new era has arisen in the information revolution. The rapid growth in the elds of computing and communications and the ongoing improvement in the performance of computerized systems have created a new space in the world. Cyberspace, a space created not in nature but by human beings. The interface between a new topic that enables unprecedented capabilities, a technical eld that demands professional understanding, and mass media that compete for the consumer creates – perhaps predictably – the potential for obfuscation. National security has also been affected by the information revolution and the cyberspace phenomenon. Smart use of new technologies allows previously unknown capabilities, which together with new methods have generated a qualitative change in the military eld. However, a public discussion on the issue of cyber security, as of other new hi-tech elds, is lacking in Israel.This essay focuses on the question of national security in light of the cyberspace phenomenon. It aims to survey the eld and create a common language for a fruitful public discussion of the developing issue of cyber security, proposing operative de nitions for the issues that can be applied in a discussion of Israel’s national security. The essay rst addresses the properties of cyberspace, its inherent vulnerabilities, and possible threats within its realm, and then proceeds to related issues of defense, attack, and deterrence in cyberspace.
Color Differences between Clockwise and Counterclockwise Spiral Galaxies
Lior Shamir
Galaxies , 2013, DOI: 10.3390/galaxies1030210
Abstract: While spiral galaxies observed from Earth clearly seem to spin in different directions, little is yet known about other differences between galaxies that spin clockwise and galaxies that spin counterclockwise. Here we compared the color of 64,399 spiral galaxies that spin clockwise to 63,215 spiral galaxies that spin counterclockwise. The results show that clockwise galaxies tend to be bluer than galaxies that spin counterclockwise. The probability that the color differences can be attributed to chance is ~0.019. g-r, r-i and i-z did not show significant differences between clockwise and counterclockwise galaxies.
Reconsidering Richard Rorty’s Private-Public Distinction
Lior Erez
Humanities , 2013, DOI: 10.3390/h2020193
Abstract: This article provides a new interpretation of Richard Rorty’s notion of the private-public distinction. The first section of the article provides a short theoretical overview of the origins of the public-private distinction in Rorty’s political thought and clarifies the Rortian terminology. The main portion of the article is dedicated to the critique of Rorty’s private-public distinction, divided into two thematic sections: (i) the private-public distinction as undesirable and (ii) the private-public distinction as unattainable. I argue that Rorty’s formulation provides plausible answers to the first kind of criticism, but not to the second. Finally, a reformulation of the private-public distinction will be suggested, which both mitigates the second line of criticism and better coheres with Rorty’s general theory.
Modulation of Mood States as a Major Factor in Relapse to Substance Use
Lior Redlus
Frontiers in Molecular Neuroscience , 2012, DOI: 10.3389/fnmol.2012.00081
Abstract:
Automatic morphological classification of galaxy images
Lior Shamir
Physics , 2009, DOI: 10.1111/j.1365-2966.2009.15366.x
Abstract: We describe an image analysis supervised learning algorithm that can automatically classify galaxy images. The algorithm is first trained using a manually classified images of elliptical, spiral, and edge-on galaxies. A large set of image features is extracted from each image, and the most informative features are selected using Fisher scores. Test images can then be classified using a simple Weighted Nearest Neighbor rule such that the Fisher scores are used as the feature weights. Experimental results show that galaxy images from Galaxy Zoo can be classified automatically to spiral, elliptical and edge-on galaxies with accuracy of ~90% compared to classifications carried out by the author. Full compilable source code of the algorithm is available for free download, and its general-purpose nature makes it suitable for other uses that involve automatic image analysis of celestial objects.
Color Differences between Clockwise and Counterclockwise Spiral Galaxies
Lior Shamir
Physics , 2013,
Abstract: While spiral galaxies observed from Earth clearly seem to spin in different directions, little is yet known about other differences between galaxies that spin clockwise and galaxies that spin counterclockwise. Here we compared the color of 64,399 spiral galaxies that spin clockwise to 63,215 spiral galaxies that spin counterclockwise. The results show that clockwise galaxies tend to be bluer than galaxies that spin counterclockwise. The probability that the color differences can be attributed to chance is ~0.019.
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