Direct CP violation is studied in two pion decays of the neutral kaon. Using data collected in the first beam period in 1997, the result for the parameter Re (ε/ε) is (18.5 ± 4.5(stat) ± 5.8(syst))× 10−4. Talk presented at the EPS–HEP 99 Conference Tampere, Finland, July 15–21, 1999 a) On behalf of the NA48 Collaboration: Cagliari, Cambridge, CERN, Dubna, Edinburgh, Ferrara, Firenze, Mainz, Ors...

The realization of truely heterogeneous database systems is hampered among others by two obstacles. One is the unsuitability of traditional transaction models, this has lead to the proposal of a new more flexible transaction model. Th.e second is the fact that none of the existing language and system support such a flexible model. This paper addresses these two issues by proposing a logic appro...

We give a pedagogical introduction to hard photoproduction processes at HERA, including the production of jets, hadrons, and prompt photons. Recent theoretical developments in the three areas are reviewed. ANL-HEP-CP-99-73

Between each node database there must be all different in the distributed heterogeneous database , so how to resolve these differences(It's said that realize the mutual transformation between heterogeneous databases) was an basic problem in the heterogeneous database integration, synchronous and optimized.This paper analyzes the conversion mechanism for the distributed heterogeneous database be...

Program speedup is an important measure of the performance of an algorithm on a parallel machine. Of particular importance is the near linear or superlinear speedup exhibited by the most performance-eecient algorithms for a given system. We describe network and program models for heterogeneous networks, deene notions of speedup and superlinear speedup, and observe that speedup consists of both ...

The analysis by the approach to equilibrium labeling method has shown that the poly(A)+ fraction of liver hnRNA is not a uniform class of molecules, but is comprised of two distinct subclasses with half-lives of 5 and 60 min, while the poly(A)- hnRNA was metabolically homogeneous and turned over with a rather uniform half-life of 30 min. The results suggest that (a) poly(A) synthesis and additi...

The problem of sharing heterogeneous database for accessing different educational resources has to be considered. The study is carried out to realize the heterogeneous database sharing for educational resources using multi-media educational resources as the researching object. XML is applied as middleware for the practical requirements of education. The study has important practical significanc...

Heterogeneous computing (HC) is the coordinated use of different types of machines, networks, and interfaces to maximize their combined performance and/or cost-effectiveness. HC systems are becoming a plausible technique for efficiently solving computationally intensive problems. The applicability and strength of HC systems are derived from their ability to match computing needs to appropriate ...

With t,ha exponential proliferation of databases and advances in wide area networking, interest, in worldwide dat,abase interoperability has gained momentum. Scalability and language support for this new environment remain open questSions. We propose a scheme where database nodes are dynamically clustered around current, areas of ibresl. Data sharing is then pursued, with any relationship infor...

Extending the Minimal Supersymmetric Standard Model with three righthanded neutrino superfields is one of the best motivated scenarios for physics beyond the Standard Model. However, very little is known from observations about the high energy parameters of this model. In this paper we show, under the plausible assumptions that the neutrino Yukawa eigenvalues are hierarchical and the absence of...