Large-scale unconditional and conditional vertex p-centre problems are solved using two meta-heuristics. One is based on a three-stage approach whereas the other relies on a guided multi-start principle. Both methods incorporate Variable Neighbourhood Search, exact method, and aggregation techniques. The methods are assessed on the TSP dataset which consist of up to 71,009 demand points with p ...

This paper studies the properties of eight semantic consequence relations defined from a Tarski-logic L and a preference relation ≺. They are equivalent to Shoham’s so-called preferential entailment for smooth model structures, but avoid certain problems of the latter in non-smooth configurations. Each of the logics can be characterized in terms of what we call multi-selection semantics. After ...

Fine-grained adaptable operating-system services can not be implemented with today’s layered operating-system architectures. Structuring a system in base level and meta level opens the implementation of operating-system services. Operating-system and run-time services are implemented by meta objects which can be replaced by other meta objects if the application requires this.

The aim of the present study is to report the results of a meta-synthesis of the empirical literature on scholars’ attitudes towards Open Access (OA) journals. A total of 15 articles published in scholarly journals since 2002 (when the Budapest Open Access Initiative was released) were included in the study and five major themes emerged from their examination and analysis. The literature indica...

Zusammenfassung In der Landesverwaltung Baden-Württemberg werden Verwaltungsabläufe möglichst vollständig auf elektronischer Basis abgewickelt. Daran beteiligt sind neben Dienstellen der Landesverwaltung auch Kommunen sowie Stellen anderer Bundesländer. Künftig sollen auch Bürger über das geplante e-Bürgerdienste-Portal des Landes Baden-Württemberg an elektronischen Verwaltungsabläufen teilnehm...

How can several individuals’opinions on some factual matters be aggregated into uni…ed collective opinions? This question arises in many contexts. A panel of climate experts may have to aggregate the panelists’con‡icting opinions into a compromise view, in order to deliver a report to the government. A jury may have to arrive at a collective opinion on the facts of a case, despite disagreements...

This paper introduces the META-NORD project which develops Nordic and Baltic part of the European open language resource infrastructure. META-NORD works on assembling, linking across languages, and making widely available the basic language resources used by developers, professionals and researchers to build specific products and applications. The goals of the project, overall approach and spec...

While subjectivity related research in other languages has increased, most of the work focuses on single languages. This paper explores the integration of features originating from multiple languages into a machine learning approach to subjectivity analysis, and aims to show that this enriched feature set provides for more effective modeling for the source as well as the target languages. We sh...

Perceived social support has long been recognized as associated with better health and longevity. However, important factors that may moderate this relationship have not been sufficiently explored. The authors used meta-analyses and meta-regressions to examine 178 all-cause mortality risk estimates from 50 publications, providing data on more than 100,000 persons. The mean hazard ratio (HR) for