background: the prevalence of allergic diseases has risen in the last decades. the objective of this study was to determine the common allergens in children via the skin prick test. methods: this cross-sectional study recruited 313 allergic children (4 months to 18 years old) referred to the asthma and allergy clinic of children’s medical center in tehran. a questionnaire containing demographic...

This paper addresses the security and efficiency issues of the Mix-net based on permutation networks introduced in [1]. We first show that the original construction results in a Mix-net that yields biased permutation, so it gives some advantage to adversaries. A simple repair is provided. We then observe that one of the original schemes can be improved so that the servers and verifier enjoy mor...

We present the architecture, design issues and functions of a MIX-based system for anonymous and unobservable real-time Internet access. This system prevents tra c analysis as well as ooding attacks. The core technologies include an adaptive, anonymous, time/volumesliced channel mechanism and a ticket-based authentication mechanism. The system also provides an interface to inform anonymous user...

Mediation is an important application of XML. The MIX mediator uses Document Type De nitions (DTDs) to assist the user in query formulation and query processors in running queries more e ciently. We provide an algorithm for inferring the view DTD from the view de nition and the source DTDs. We develop a metric of the quality of the inference algorithm's view DTD by formalizing the notions of so...

Rival firms often cooperate horizontally in order to share risks and achieve scale advantages in production or in their research and development projects. The output of these strategic alliances is usually sold by the individual ally company under its own brand and using its own marketing mix strategies. Marketing strategies create a cumulative effect that is reflected in brand value. Although ...

A user is only anonymous within a set of other users. Hence, the core functionality of an anonymity providing technique is to establish an anonymity set. In open environments, such as the Internet, the established anonymity sets in the whole are observable and change with every anonymous communication. We use this fact of changing anonymity sets and present a model where we can determine the pr...

All voting protocols proposed so far, with the exception of a few, have the property that the privacy of the ballot is only computational. In this paper we outline a new and conceptually simple approach allowing us to construct a protocol in which the privacy of the ballot is unconditional. Our basic idea is to modify the protocol of Fujioka, Okamoto and Ohta[10], which uses blind signatures so...

mebudipine is a new dihydropyridine calcium channel blocker, synthesized in our laboratory, for treatment of hypertension. it has shown a better efficacy than other drugs in this group. for assessing the risks of this drug, certain safety tests in the preclinical stage have been performed. in this study mutagenic effect of mebudipine was evaluated using ames assay that could assess the mutageni...