Bar-Ilan University

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.

Rock fragments in top soils: significance and processes

Abstract: This introductory paper reviews various aspects of rock fragments in top soils. Such information is required for various reasons and in particular for predicting the impact of climatic or landuse changes on the response of these soils. Particular attention is paid to the definition and measurement of rock fragment content in top soils, the density of soils containing rock fragments, the spatial distribution and movement of rock fragments in top soils, the effects of rock fragments on some key hydrological processes, thermal properties of top soils, physical soil degradation, soil erosion and soil productivity.

Linguistic Landscape as Symbolic Construction of the Public Space: The Case of Israel.

Abstract: Linguistic landscape (LL) refers to linguistic objects that mark the public space. This paper compares patterns of LL in a variety of homogeneous and mixed Israeli cities, and in East Jerusalem. The groups studied were Israeli Jews, Palestinian Israelis and non-Israeli Palestinians from East Jerusalem, of whom most are not Israeli citizens. The study focused on the degree of visibility on private and public signs of the three major languages of Israel-Hebrew, Arabic and English. This study reveals essentially different LL patterns in Israel's various communities: Hebrew–English signs prevail in Jewish communities; Arabic Hebrew in Israeli–Palestinian communities; Arabic–English in East Jerusalem. Further analyses also evince significant – and different – discrepancies between public and private signs in the localities investigated. All in all, LL items are not faithfully representative of the linguistic repertoire typical of Israel's ethnolinguistic diversity, but rather of those linguistic resources that...

Attachment styles, coping strategies, and posttraumatic psychological distress: the impact of the Gulf War in Israel.

Abstract: This study examines the association between adult attachment style and the way people reacted to the Iraqi missile attack on Israel during the Gulf War. One hundred forty Israeli students were interviewed 2 weeks after the war and classified according to their attachment style (secure, avoidant, or ambivalent) and residence area (dangerous vs. less dangerous). Ambivalent people reported more distress than secure people. Avoidant persons reported higher levels of somatization, hostility, and trauma-related avoidance than secure persons. These results characterized Ss living in dangerous areas. In addition, secure people used relatively more support-seeking strategies in coping with the trauma, ambivalent people used more emotion-focused strategies, and avoidant people used more distancing strategies. Findings are discussed in terms of attachment working models.

Proofs of ownership in remote storage systems

Abstract: Cloud storage systems are becoming increasingly popular. A promising technology that keeps their cost down is deduplication, which stores only a single copy of repeating data. Client-side deduplication attempts to identify deduplication opportunities already at the client and save the bandwidth of uploading copies of existing files to the server. In this work we identify attacks that exploit client-side deduplication, allowing an attacker to gain access to arbitrary-size files of other users based on a very small hash signatures of these files. More specifically, an attacker who knows the hash signature of a file can convince the storage service that it owns that file, hence the server lets the attacker download the entire file. (In parallel to our work, a subset of these attacks were recently introduced in the wild with respect to the Dropbox file synchronization service.) To overcome such attacks, we introduce the notion of proofs-of-ownership (PoWs), which lets a client efficiently prove to a server that that the client holds a file, rather than just some short information about it. We formalize the concept of proof-of-ownership, under rigorous security definitions, and rigorous efficiency requirements of Petabyte scale storage systems. We then present solutions based on Merkle trees and specific encodings, and analyze their security. We implemented one variant of the scheme. Our performance measurements indicate that the scheme incurs only a small overhead compared to naive client-side deduplication.