Model-based Quality of Service (QoS) prediction approaches enable an early identification of bottlenecks in the design of complex software systems. In addition, they allow software architects to evaluate design decisions against each other. In data-intensive business applications, database accesses have a significant impact on a system’s QoS. Therefore, these accesses need to be considered in o...

Let p, l be distinct odd primes, q be an odd prime power with gcd(q, p) = gcd(q, l) = 1, and m, n be positive integers. In this paper, we determine all self-dual, self-orthogonal and complementarydual negacyclic codes of length 2pl over the finite field Fq with q elements. We also illustrate our results with some examples.

Alexander Thomasian IBM T. J. Watson Research Center P.O. Box 704 Yorktown Heights, NY 10598, USA The performance of high-volume transaction processing systems is determined by the degree of contention for hardware resources as well as data. Data contention is especially a problem in the case of data partitioned (e.g., distributed) systems with global transactions accessing and updating objects...

The fabrication of complex 3D structures composed micrometer-sized features made different functional materials is an immensely important and yet highly challenging task. Here, a method developed to fabricate multimaterial with micrometer precision by combining macroscopic printing (digital light processing), two-photon lithography (2PL) material-independent discontinuous dewetting. Specificall...

Various concurrency control algorithms have been proposed for use in distributed database systems. Even, the large number of available algorithms, but the fact that distributed database systems are becoming a commercial reality, distributed concurrency control performance tradeoffs are still not well understood. In this paper, we focus on some of the important issues by studying four representa...

the large number of applications manages time varying data. existing databasetechnology seldom supports temporal database, tdb, according to time aspects.these intrinsic temporal database applications rely on such database which storesand retrieves time referenced data. moreover, applications need to be managed oncommon data items access simultaneously and to be precluded from inconsistencyas s...

Disconnection of mobile clients from server, in an unclear time and for an unknown duration, due to mobility of mobile clients, is the most important challenges for concurrency control in mobile database with client-server model. Applying pessimistic common classic methods of concurrency control (like 2pl) in mobile database leads to long duration blocking and increasing waiting time of transac...

Multiple-choice questions (MCQs) are commonly used in higher education assessment tasks because they can be easily and accurately scored, while giving good coverage of instructional content in a short time. However, studies that have evaluated the quality of MCQs used in higher education assessments have found many flawed items, resulting in misleading insights about student performance and con...

This study aims to describe the Physics test item parameters in Work and Energy students’ abilities using response theory approach (IRT) dichotomous scoring. research is quantitative descriptive. The subjects were 1175 high school class XI students West Java Banten provinces consisting of 450 male 725 female students. instrument used was as many 25 items multiple choices with Student data scori...

The Optimistic Concurrency Control (OCC) method has been commonly used for in-memory databases to ensure transaction serializability — a transaction will be aborted if its read set has been changed during execution. This simple criterion to abort transactions causes a large proportion of false positives, leading to excessive transaction aborts. Transactions aborted false-positively (i.e. false ...