When a file is loaded into a direct access storage device using key-to-address transformations, the number and size of storage blocks can be selected. In this study, a selection that minimizes the combined cost of storage space and accesses to the storage device is determined for the case where no record additions or deletions occur after loading. The analysis is based on the assumption that fo...

For the modularized start version of the FAIR project, a scenario was proposed with accumulation of antiprotons in the High Energy Storage Ring (HESR). The accumulation uses pre-cooled antiprotons from the Collector Ring (CR) for longitudinal accumulation by the combination of barrier buckets and stochastic cooling. As a benchmarking of computer simulations and for studies of technical requirem...

We study the limiting distribution of the degree of a given node in a scaled attachment random recursive tree, a generalized random recursive tree, which is introduced by Devroye et. al (2011). In a scaled attachment random recursive tree, every node $i$ is attached to the node labeled $lfloor iX_i floor$ where $X_0$, $ldots$ , $X_n$ is a sequence of i.i.d. random variables, with support in [0,...

Predicted range aggregate (PRA) query is an important researching issue in spatio-temporal databases. Recent studies have developed two major classes of PRA query methods: (1) accurate approaches, which search the common moving objects indexes to obtain an accurate result; and (2) estimate methods, which utilize approximate techniques to estimate the result with an acceptable error. In this pap...

We describe NCSTRL+, a unified, canonical digital library for scientific and technical information (STI). NCSTRL+ is based on the Networked Computer Science Technical Report Library (NCSTRL), a World Wide Web (WWW) accessible digital library (DL) that provides access to over 100 university departments and laboratories. NCSTRL+ implements two new technologies: cluster functionality and publishin...

We apply novel bunch forms for e$cient laser cooling of fast stored ion beams at the Heidelberg Test Storage Ring. 9Be` ions are longitudinally con"ned in barrier buckets providing free motion of the cooled ions inside the bucket (quasi-coasting beam). The implementation of laser cooling in barrier buckets is described, and longitudinal dynamics of laser cooling is compared to electron cooling....

Given the choice, most users pick poor passwords that are vulnerable to attack. Using random machine generated passwords can ensure that ‘good’ passwords are chosen, but are user-unfriendly. Machine generated passwords which are ‘pronounceable’ represent a potential compromise between security considerations and user friendliness. Several such generators have been designed, perhaps the most pro...

consider the random walk among n places with n(n - 1)/2 transports. we attach an exponential random variable xij to each transport between places pi and pj and take these random variables mutually independent. if transports are possible or impossible independently with probability p and 1-p, respectively, then we give a lower bound for the distribution function of the smallest path at point log...

Bucket is key and primary component of heavy construction machinery such as excavators. It has to bear high impact loads during digging process, resulting in large stress deformations. This research work been focused on reducing deformations produced excavator bucket due digging. For this purpose, different design patents buckets (including ornamental designs) were considered. Various models de...

Abstract The aim of this study was to investigate the presence virulence and antimicrobial resistance genes clonal profile Enterobacteriaceae isolated from calves, cows, feeding buckets milk bucket. A a total 31 isolates calves (6), bucket (6) cows’ rectum (13) were used. LT, STa, STb, STx1, STx2, eae, rmpA, wabG, mrkD, kfu, mcgA, fimH uge as well genes: AmpC MOX, FOX, MIR, ACT, DHA, ACC, CTX-M...