scispace - formally typeset
Search or ask a question
Institution

Bar-Ilan University

EducationRamat Gan, Israel
About: Bar-Ilan University is a education organization based out in Ramat Gan, Israel. It is known for research contribution in the topics: Population & Poison control. The organization has 12835 authors who have published 34964 publications receiving 995648 citations. The organization is also known as: Bar Ilan University & BIU.


Papers
More filters
Posted Content
TL;DR: In this paper, the Littlestone's Winnow algorithm was used for text categorization in the domain of text classification, and the results showed that it is suitable for this domain.
Abstract: Learning problems in the text processing domain often map the text to a space whose dimensions are the measured features of the text, e.g., its words. Three characteristic properties of this domain are (a) very high dimensionality, (b) both the learned concepts and the instances reside very sparsely in the feature space, and (c) a high variation in the number of active features in an instance. In this work we study three mistake-driven learning algorithms for a typical task of this nature -- text categorization. We argue that these algorithms -- which categorize documents by learning a linear separator in the feature space -- have a few properties that make them ideal for this domain. We then show that a quantum leap in performance is achieved when we further modify the algorithms to better address some of the specific characteristics of the domain. In particular, we demonstrate (1) how variation in document length can be tolerated by either normalizing feature weights or by using negative weights, (2) the positive effect of applying a threshold range in training, (3) alternatives in considering feature frequency, and (4) the benefits of discarding features while training. Overall, we present an algorithm, a variation of Littlestone's Winnow, which performs significantly better than any other algorithm tested on this task using a similar feature set.

216 citations

Journal ArticleDOI
TL;DR: In this article, electron spin resonance measurements revealed that aqueous suspensions of small nanoparticles of ZnO produce increased levels of reactive oxygen species, namely hydroxyl radicals and singlet oxygen.
Abstract: Nanoparticles of ZnO have been shown to have marked antibacterial and anticancerous activities. The toxic effect of ZnO has been found to exist due to a reaction of the ZnO surface with water. In the present work electron-spin resonance measurements revealed that aqueous suspensions of small nanoparticles of ZnO produce increased levels of reactive oxygen species, namely hydroxyl radicals and singlet oxygen. Interestingly, a remarkable enhancement of the oxy radicals, was detected when the ZnO water suspension had been irradiated with blue (400−500 nm) light. The characterization of the mechanism of light-induced oxy radicals formation by ZnO nanoparticles would contribute to its use as a sterilization agent.

216 citations

Journal ArticleDOI
TL;DR: Investigating whether MM affects self-referential processing, associated with default mode network (DMN), either as short (state) - or long-term (trait) effects found state increases in posterior gamma power, suggesting increased attention and sensory awareness.

215 citations

Journal ArticleDOI
TL;DR: In this article, the authors examined attitudes towards inclusion and sense of efficacy of 1155 Israeli preservice teachers and variables related to these beliefs and found strong support for the principle of inclusion, yet also support for segregated special education placements.
Abstract: The study examined attitudes towards inclusion and sense of efficacy of 1155 Israeli preservice teachers and variables related to these beliefs. Participants responded to an Options related to inclusion scale, and a Teacher efficacy scale. Findings revealed strong support for the principle of inclusion, yet also support for segregated special education placements. Several concerns regarding inclusion were expressed, which were related to the area of classroom management and teacher instructional skills. Sense of efficacy scores on personal efficacy, social efficacy and efficacy regarding low‐achieving students were higher than those for teaching efficacy. Less support for inclusion was found for students in Arab (Muslim) colleges compared to students in Jewish colleges. These two groups were also different on self‐efficacy scores. The major area of study and experience was associated with the level of support for inclusion and to self‐efficacy scores. The progression in the training programme was associat...

215 citations

Journal ArticleDOI
TL;DR: Regression analysis indicated that the adult's representations of bonding to parents predicted OT levels above and beyond cortisol, psychological distress, and attachment, and suggest that oxytocin may play a role in bonding-related cognitions across the life span.
Abstract: Despite extensive research on the involvement of oxytocin (OT) in mammalian bonding, less is known about its role in human social affiliation across the life cycle. Forty-five romantically unattached young adults participated. Plasma oxytocin and salivary cortisol were assessed using enzyme immuno-assay, and self-report measures of bonding, attachment, anxiety, and depression were collected. Oxytocin was associated with bonding to own parents and inversely related to psychological distress, particularly depressive symptoms. Cortisol was related to attachment anxiety. Regression analysis indicated that the adult's representations of bonding to parents predicted OT levels above and beyond cortisol, psychological distress, and attachment. Findings are consistent with antistress models of oxytocin and suggest that oxytocin may play a role in bonding-related cognitions across the life span.

215 citations


Authors

Showing all 13037 results

NameH-indexPapersCitations
H. Eugene Stanley1541190122321
Albert-László Barabási152438200119
Shlomo Havlin131101383347
Stuart A. Aaronson12965769633
Britton Chance128111276591
Mark A. Ratner12796868132
Doron Aurbach12679769313
Jun Yu121117481186
Richard J. Wurtman11493353290
Amir Lerman11187751969
Zhu Han109140748725
Moussa B.H. Youdim10757442538
Juan Bisquert10745046267
Rachel Yehuda10646136726
Michael F. Green10648545707
Network Information
Related Institutions (5)
University of Maryland, College Park
155.9K papers, 7.2M citations

93% related

Rutgers University
159.4K papers, 6.7M citations

93% related

University of Illinois at Urbana–Champaign
225.1K papers, 10.1M citations

93% related

Boston University
119.6K papers, 6.2M citations

92% related

Pennsylvania State University
196.8K papers, 8.3M citations

92% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023117
2022330
20212,286
20202,157
20191,920
20181,768