We present a stringy mechanism to generate Dirac neutrino masses by D-instantons in an experimentally relevant mass scale without fine-tuning. Within type IIA string theory with intersecting D6-branes, we spell out specific conditions for the emergence of such couplings and provide a class of supersymmetric local SU(5) grand unified models, based on the Z2 × Z'2 orientifold compactification, wh...

Human neuroimaging and animal studies have recently implicated the ventromedial prefrontal cortex (vmPFC) in memory schema, particularly in facilitating new encoding by existing schemas. In humans, the most conspicuous memory disorder following vmPFC damage is confabulation; strategic retrieval models suggest that aberrant schema activation or reinstatement plays a role in confabulation. This r...

A metadata schema which defines constraints about metadata records is a fundamental resource for metadata interoperability. Building interoperable metadata schemas has been a main topic of the Dublin Core since its early days. It is important to make use of existing metadata schemas to develop a new schema in order to minimize newly defined metadata vocabularies, which is how DCMI has developed...

Integrating data from multiple heterogeneous sources entail dealing with different data models, schemas and query languages. The burgeoning Semantic Web has provided several new methods for data integration. This paper focuses on integration of relational database and XML data. To solve the problem we propose an ontologybased approach. A semantic integration infrastructure for heterogeneous dat...

This article describes the development of MYNG to Version 1.01 in order to integrate the new Deliberation RuleML Version 1.01 Relax NG schema modules – and the RuleML sublanguages they define – into the RuleML language lattice, as well as to improve the functionality of the MYNG GUI and REST interface. MYNG support is provided for including the new modules of Deliberation RuleML 1.01 into custo...

Schema evolution is the process of applying changes to a schema in a consistent way and propagating these changes to the instances while the database is in operation. However, when a database is shared by many users, updates to the database schema are always difficult. To overcome this problem, in this paper we propose a version mechanism for schema evolution in ODMG databases that preserves ol...

This paper presents a new approach to schema evolution which combines the activities of schema integration and schema evolu tion into one framework In previous work we have developed a general framework to support schema transformation and integration in hetero geneous database architectures Here we show how this framework also readily supports evolution of source schemas allowing the global sc...

It provides an object-relational mapping approach that lets you declaratively define how to map Java objects to Generate a Java Model from an XML schema. In this research, we propose a new technique to convert the relational database contents and schema into XML schema (XSDXML Schema Definition),. We currently use.NET DataSet.ReadXmlSchema() function to convert a XML schema into a relational st...

In this paper two external schema generation algorithms are presented. These algorithms are defined in the framework of the new external schema definition methodology for OODBs put forward in (Samos, 1995); they generate an external schema from a set of classes selected from those existing in an external schema definition repository. Their main characteristic is that they avoid the generation o...

An XML Schema describes the structure of valid documents and can be exploited both for querying and for efficiently accessing valid documents. XML Schemas, however, may need to be updated to adhere to new requirements and to face the changes in the application domain. Starting from a set of schema modification primitives, in this paper we devise a new validation approach that allows to efficien...