Ubiquitous computing (ubicomp) demands new security and privacy enhancing technologies for the new information and communication environments where a huge number of computers interact with each other in a distributed and ad hoc manner to access various resources and services. This paper surveys emerging security and privacy enhancing technologies, focusing on access control in ubiquitous comput...

Attribute-based access control (ABAC) is a very powerful and flexible security technique making it possible to overcome limitations of traditional role-based and discretionary access controls. ABAC enables the dynamic handling of vast numbers of heterogeneous and changing resources and users, a task especially relevant for E-Commerce or distributed computing. With an authentication and authoris...

Tor is one of the most widely used privacy enhancing technologies for achieving online anonymity and resisting censorship. While conventional wisdom dictates that the level of anonymity offered by Tor increases as its user base grows, the most significant obstacle to Tor adoption continues to be its slow performance. We seek to enhance Tor’s performance by offering techniques to control congest...

Root-lesion disease, which is caused by Pratylenchus loosi , is one of the most important diseases currently impacting Iran tea plantations. This disease causes great economic crop impacts. Northern provinces, which supply much of Iran’s tea production, have been especially hard impact by root-lesion disease.The purpose of this study was to biological control the nematodes as one of the main se...

in the present study, pathogenicity of four native strains of entomopathogenic fungus; metarhizium anisopliae, was studied against adult stage of ixodes ricinus. for this purpose a total number of 180 adult ticks were examined in triplicate. thirty ticks for each strain and negative and positive controls were immersed in 2.4×107 fungal conidia/ml in vitro. samples were incubated in separate pet...

abstract this research was invistigated activitiy of antagonistic activity of 200 soil actinomycete isolates assayed against phytophthora parasitica and p. citrophthora in kerman provice. among all actinomycetes, strains of 19 and 29 showed high level of activity in agar disk and well-diffusion methods. in both isolates, the active substance was water and metanol soluble but insoluble in chloro...

in this study, the effect of carbon and nitrogen sources, on production of yeast biomass was determined as well as the efficacy of various formulations of candida membranifaciens to decrease blue mold on apple. the media containing sugar cane molasses as carbon sources caused more yeast growth than the media supplemented with permeate powder. yeast extract as nitrogen source produced higher bio...

in the years 2012-14 a series of extensive surveys for natural enemies of parthenium were conducted in haryana. during survey, a leaf spot disease has been regularly reported on congress grass at different parts of the kurukshetra and its adjoining areas.the fungal pathogen was isolated from the affected parts of parthenium leaves and on the basis of cultural, morphological and molecular charac...

Much has already been written about the technology, the basic ideas as well as the potential clinical needs behind the combining of MR and PET. As with all new imaging methodologies, there is debate as to how much this technology is really needed (similarly, for example, with the availability of PET/CT) and the discussion regarding MR/PET in particular concerns the level of integration and, eve...

The present work was carried out to investigate first, the ecology of the Sepedon flies as well as speciesof Lymnea snails and secondly, the biological effects of Sepedon fly larvae living on Lymnea. In this regard,the life cycle, death rate and compatibility of Lymnea species, as well as the life cycle of Sepedon flies inbreeding cage and the activity of the new larvae in the same ecological c...