Results 1  10
of
153
Two Approaches to Event Definition
 In Proc. Int. Conf. on Database and Expert Systems Applications
, 2002
"... We compare two approaches to event definition, deriving from the Active Database and Knowledge Representation communities. We relate these approaches by taking a system of the former kind, displaying some of its shortcomings, and rectifying them by remodelling the system in the latter style. We furt ..."
Abstract

Cited by 47 (5 self)
 Add to MetaCart
We compare two approaches to event definition, deriving from the Active Database and Knowledge Representation communities. We relate these approaches by taking a system of the former kind, displaying some of its shortcomings, and rectifying them by remodelling the system in the latter style. We further show the extent to which the original system can be recreated within the remodelled system. This bridge between the two approaches should provide a starting point for fruitful interaction between the two communities.
DeeDS Towards a Distributed and Active RealTime Database System
 ACM SIGMOD Record
, 1996
"... Introduction There is a great need for building research prototypes of realtime database systems, because existing techniques are often ad hoc or concealed in internal solutions, and few, if any, commercial offerings exist. As realtime applications inherently use reactive mechanisms, and a wealth ..."
Abstract

Cited by 49 (23 self)
 Add to MetaCart
Introduction There is a great need for building research prototypes of realtime database systems, because existing techniques are often ad hoc or concealed in internal solutions, and few, if any, commercial offerings exist. As realtime applications inherently use reactive mechanisms, and a wealth of results now exists on active database management systems [5], we decided to build DeeDS, a [D]istributed Activ[e], RealTim[e] [D]atabase [S]ystem prototype. This research effort is challenging due to the unique combination of reactive mechanisms, distributed technology, dynamic scheduling, and integrated monitoring, under a mixture of soft and hard realtime constraints. To make all this feasible with a limited amount of manpower, we have taken a deliberate approach of building with existing components where possible, and including only those features absolutely necessary to obtain the benefit of each of the architectural dimensions. At the same time, features a
IMPACTPARAMETER DEPENDENCE OF THE DIAGONAL GPD OF THE PION FROM CHIRAL QUARK MODELS ∗
, 2003
"... We analyze the impactparameter dependent diagonal nonsinglet generalized parton distribution of the pion in two distinct chiral quark models: the Spectral Quark Model and the NambuJonaLasinio model. Leadingorder perturbative QCD evolution from the low quarkmodel scale to higher scales is carri ..."
Abstract
 Add to MetaCart
We analyze the impactparameter dependent diagonal nonsinglet generalized parton distribution of the pion in two distinct chiral quark models: the Spectral Quark Model and the NambuJonaLasinio model. Leadingorder perturbative QCD evolution from the low quarkmodel scale to higher scales
Pion structure function in nuclear medium
, 1995
"... We study the pion structure function in nuclear medium using the Nambu and JonaLasinio model, and its implication for the nuclear pion enhancement of the sea quark distribution in nuclei. By using the operator product expansion, medium effect of the nuclear matter is incorporated in calculations of ..."
Abstract
 Add to MetaCart
We study the pion structure function in nuclear medium using the Nambu and JonaLasinio model, and its implication for the nuclear pion enhancement of the sea quark distribution in nuclei. By using the operator product expansion, medium effect of the nuclear matter is incorporated in calculations
Mesonic Parton Densities Derived From Constituent Quark Model Constraints
, 1997
"... Using constituent quark model constraints we calculate the gluon and sea content of pions solely in terms of their valence density and the known sea and gluon densities of the nucleon. The resulting smallx predictions for g π (x, Q 2) and ¯q π (x, Q 2) are unique and parameter free, being entirely ..."
Abstract
 Add to MetaCart
≡ dp − ¯ dp are the valence quark densities, ¯q p = ( ūp + ¯ dp) /2, and ⊗ denotes the usual convolution which becomes a simple product for the corresponding Mellin nmoments, henceforth utilized in our discussion and for our explicit calculations. We rewrite these equations in Mellin nmoment space
hepph/9801379 Chiral Odd Structure Functions from a Chiral Soliton
, 1998
"... We calculate the chiral odd quark distributions and the corresponding structure functions hT(x, Q2) and hL(x, Q2) within the Nambu–Jona–Lasinio chiral soliton model for the nucleon. The Q2 evolution of the twist–2 contributions is performed according to the standard GLAP formalism while the twist–th ..."
Abstract
 Add to MetaCart
We calculate the chiral odd quark distributions and the corresponding structure functions hT(x, Q2) and hL(x, Q2) within the Nambu–Jona–Lasinio chiral soliton model for the nucleon. The Q2 evolution of the twist–2 contributions is performed according to the standard GLAP formalism while the twist
Odd Structure Functions from a Chiral Soliton
, 1998
"... We calculate the chiral odd structure functions hT(x, Q2) and hL(x, Q2) within the Nambu–Jona–Lasinio chiral soliton model for the nucleon. The Q2 evolution of the twist– 2 contributions is performed according to the standard GLAP formalism while the twist– three piece, hL(x), is evolved according t ..."
Abstract
 Add to MetaCart
We calculate the chiral odd structure functions hT(x, Q2) and hL(x, Q2) within the Nambu–Jona–Lasinio chiral soliton model for the nucleon. The Q2 evolution of the twist– 2 contributions is performed according to the standard GLAP formalism while the twist– three piece, hL(x), is evolved according
Generalized parton distributions and the structure of the nucleon,” arXiv:0711.2625 [hepph
"... Summary. — Generalized parton distributions have been introduced in recent years as a suitable theoretical tool to study the structure of the nucleon. Unifying the concepts of parton distributions and hadronic form factors, they provide a comprehensive framework for describing the quark and gluon st ..."
Abstract

Cited by 17 (0 self)
 Add to MetaCart
Summary. — Generalized parton distributions have been introduced in recent years as a suitable theoretical tool to study the structure of the nucleon. Unifying the concepts of parton distributions and hadronic form factors, they provide a comprehensive framework for describing the quark and gluon structure of the nucleon. In this review their formal properties and modeling are discussed, summarizing the most recent developments in the phenomenological description of these functions. The status of available data is also presented. PACS 12.38.t – Quantum chromodynamics. PACS 12.39.x – Phenomenological quark models. PACS 13.60.r – Photon and chargedlepton interactions with hadrons.
On the Testing Maturity of Software Producing Organizations
"... This paper presents data from a study of the current state of practice of software testing. Test managers from twelve different software organizations were interviewed. The interviews focused on the amount of resources spent on testing, how the testing is conducted, and the knowledge of the personne ..."
Abstract

Cited by 9 (1 self)
 Add to MetaCart
This paper presents data from a study of the current state of practice of software testing. Test managers from twelve different software organizations were interviewed. The interviews focused on the amount of resources spent on testing, how the testing is conducted, and the knowledge of the personnel in the test organizations. The data indicate that the overall test maturity is low. Test managers are aware of this but have trouble improving. One problem is that the organizations are commercially successful, suggesting that products must already be “good enough.” Also, the current lack of structured testing in practice makes it difficult to quantify the current level of maturity and thereby articulate the potential gain from increasing testing maturity to upper management and developers.
Input parameter modeling for combination strategies
, 2007
"... Combination strategies are test methods that generate test cases based on input parameter models. This paper suggests a structured modeling method used to translate requirements expressed in a general format into an input parameter model suitable for combination strategies. This paper also describes ..."
Abstract

Cited by 7 (0 self)
 Add to MetaCart
Combination strategies are test methods that generate test cases based on input parameter models. This paper suggests a structured modeling method used to translate requirements expressed in a general format into an input parameter model suitable for combination strategies. This paper also describes results from two initial experiments exploring the efficiency and effectiveness of the modeling method. These results indicate that the resulting models may contain enough information to detect the vast majority of faults in the system under test. Further, results indicate that the modeling method is simple enough to use in practical testing.
Results 1  10
of
153