Bovine viral diarrhoea virus (BVDV) is an important pathogen of dairy cattle. In this study, bulk milk samples representing a total of 4105 milking cows, from 18 dairy cattle herds in the suburb of Mashhad- Iran, were tested for presence of BVDV by the use of a nested reverse transcription polymerase chain reaction (Nested RT- PCR) assay. Non of the cows in the herds had been vaccinated against...

In this paper, we first define the correlated table of an SQL query without nested subqueries which extends the result set of an SQL query to a set of result sets, one for each distinct binding tuple. We then present an algorithm to convert any SQL query with nested subqueries to a correlated query without nested subqueries. The proposed algorithm provides a simple but very effective method unn...

E cient retrieval of nested objects is an important issue in advanced database systems. So far, many indexing methods for nested objects are proposed. However, they do not consider retrieval of nested objects based on the set comparison operators such as and . In this paper, we propose four set access facilities for nested objects and compare their performance in terms of retrieval cost, storag...

In high centre-of-mass energy lepton-nucleon collisions the space-time time resolution of partonic processes can be fine-tuned within a dynamical range which is unattainable in hadronic collisions. Replacing nucleons by nuclei of variable atomic number enables one to tune the strength of colour forces. The experimental program of high energy electronnucleon and its extension to electron-nucleus...

An inexpensive and portable approach to measure the time an experimental event occurs as measured by a specific electronic clock is presented. The clock resets in active synchronization with the experimental AC-power cycle. This allows an efficient and complete correction for correlated noise contributions to pulse area and time measurements of detector channels equipped with PhotoMultiplier Tu...

2 Transaction Approach 47 2.1 A Design Task Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 2.2 Compatibility Set Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 2.3 Constraint-Based Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 2.3.1 Intuitive Model of CAD Transaction . . . . . . . . . . . . . . . . . . . ...

This paper proposes various strategies for the checking of integrity constraints in multidatabase systems which support nested transactions. The solution presented in 8] for centralized environments is extended. The principle of this solution consists of designating a sub-transaction which controls the checking of each integrity constraint. This sub-transaction is the smallest common ancestor (...

Using muons as a source of neutrinos can be traced back to 25 years ago but it is with the recent studies on muon colliders that this idea came back to the front of the stage. It was specifically discussed in a FNAL workshop (1997), a BNL workshop (1998) and a study group dedicated to that topic was set up at CERN in 1998. νFact99 appears as the conclusion of this preparatory work and is the fi...

We present a global analysis of leptonic and semileptonic kaon decay data, including all recent results published by the BNL-E865, KLOE, KTeV, ISTRA+ and NA48 experiments. This analysis , in conjunction with precise lattice calculations of the hadronic matrix elements now available, leads to a very accurate determination of V us , and allows us to perform several stringent tests of the Standard...