1,025 research outputs found
TINA as a virtual market place for telecommunication and information services: the VITAL experiment
No full textThe VITAL (Validation of Integrated Telecommunication Architectures for the Long-Term) project has defined, implemented and demonstrated an open distributed telecommunication architecture (ODTA) for deploying, managing and using a set of heterogeneous multimedia, multi-party, and mobility services. The architecture was based on the latest specifications released by TINA-C. The architecture was challenged in a set of trials by means of a heterogeneous set of applications. Some of the applications were developed within the project from scratch, while some others focused on integrating commercially available applications. The applications were selected in such a way as to assure full coverage of the architecture implementation and reflect a realistic use of it. The VITAL experience of refining and implementing TINA specifications and challenging the resulting platform by a heterogeneous set of services has proven the openness, flexibility and reusability of TINA. This paper describes the VITAL approach when choosing the different services and how they challenge and interact with the architecture, focusing especially on the service architecture and the Ret reference point definitions. The VITAL adjustments and enhancements to the TINA architecture are described. This paper contributes to proving that the TINA-based VITAL ODTA allows for easy and cost-effective development and deployment of advanced end-user and operator services, and can indeed act as the basis for a virtual market place for telecommunications service
nobuaki-mzmt/tandem-fossil: Version 1.0.1
No full text<p>This repository provides access to the data and source code used for the manuscript</p>
<h3><a href="https://github.com/nobuaki-mzmt/tandem-fossil#extinct-and-extant-termites-reveal-the-fidelity-of-behavior-fossilization-in-amber"></a><strong>Extinct and extant termites reveal the fidelity of behavior fossilization in amber</strong></h3>
<p>Nobuaki Mizumoto, Simon Hellemans, Michael S Engel, Thomas Bourguignon, Aleš Buček</p>
Current and historic gene flow of the sand goby <i>Pomatoschistus minutus</i> on the European Continental Shelf and in the Mediterranean Sea
No full textPhylogeographical patterns of the sand goby Pomatoschistus minutus (Gobiidae, Teleostei) were studied by means of sequence and single-stranded conformational polymorphism analysis of a 283-bp fragment of the cytochrome b locus of the mtDNA. A total of 228 individuals sampled at 13 sites throughout the species's distributional range revealed a moderate level of diversity and a low but significant level of overall genetic differentiation at all but one site. The goby sample from the Adriatic Sea differed in sequence by approximately 10% from the Atlantic P. minutus and is thought to belong to a cryptic species of the genus Pomatoschistus. Limited genetic differentiation with a weak pattern of isolation-by-distance was recorded throughout the distributional range of the typical P. minutus. Phylogeographical analysis suggested a contiguous range expansion in the Atlantic and Baltic basins during the Eemian and evidence for a glacial refugium in the southern North Sea during the Weichselian. In P. minutus from the western Mediterranean Sea a high number of endemic haplotypes as well as the most common Atlantic haplotype were recorded in appreciable frequencies. This might be explained by secondary contact between different mitochondrial lineages, which evolved in allopatry
Work ability and its antecedents among cleaning professionals: a comparative study of age subgroups
No full textAfter many early retirement plans for employees over 55 years and while baby boomers are leaving the labor market, the analysis of work conditions and work ability of the workforce have nowadays become compelling scientific issues and unavoidable challenges for scientists, politicians and stakeholders. These questions are obviously even more critical in areas with high occupational risks. This is the case with industrial cleaning: high speed and quantity of work, low interest, low rewards, low acknowledgment, low co-worker support and low job control (osha.europa.eu, 2010); furthermore, workers are particularly vulnerable to accidents and to musculoskeletal disorders (fatfao.fgov.be, 2002).The present study has two objectives: (1) analyze work ability and its potential antecedents, i.e. the work conditions that workers assume over age in the cleaning sector; (2) compare the contributions of the VOW/QFT (Vragenlijst Over Werkbaarheid/Questionnaire sur les Facultés de Travail) a very complete questionnaire proposed and used by the Belgian Federal Public Service of Employment (Hellemans, 2011, 2013; Hellemans & Closon, 2013) with the well-known but rather superficial WAI (Work Ability Index) (Ilmarinen, Tuomi, & Klockars, 1997; Ilmarinen, 2007). The survey was carried out upon a sample of 228 cleaning professionals working in various places on Belgian territory (industries, university, hospital, catering services – but not in private homes). They completed both the VOW/QFT and the WAI.The results confirm that work ability is influenced by age :F(2, 164) = 4.46, p = .013. The older workers (50+) have a worse work ability score, but there is no difference between less than 40 workers and 40-49 workers. Furthermore, correlations between the two work ability indices from the VOW/QFT with the WAI score are high (r = .41 and .47), and even higher when analyzed from only the 50+ subgroup (r = .53 and .56).info:eu-repo/semantics/nonPublishe
Aceetaldehyde
No full textDocument(en) uit de collectie Chemische Procestechnologie.DelftChemTechApplied Science
Mitochondrial and chemical profiles reveal a new genus and species of Neotropical termite with snapping soldiers, Palmitermes impostor (Termitidae: Termitinae)
No full textSince the inception of Linnaean taxonomy, termite species and genus descriptions have been mostly based on the morphology of soldiers, sometimes complemented by alate characters, though these are seldom discriminant. However, narrowly soldier-based descriptions may overemphasise ancestral characters and lead to the establishment of non-monophyletic taxa. In this paper, we used an integrative taxonomic approach that incorporates the morphology of all castes, including workers, as well as molecular and chemical data, to describe Palmitermes impostor Hellemans & Roisin, 2017 (Termitidae:Termitinae), a new termite genus and species from French Guiana. Although the soldiers of P. impostor resemble those of Termes Linnaeus, 1758, the digestive tract and mandibles of workers suggest that Palmitermes is closely related to Cavitermes Emerson, 1925. The sister-group relationship between Palmitermes and Cavitermes was confirmed by a phylogenetic reconstruction based on full mitochondrial genome sequences as well as by the comparison of the profiles of cuticular hydrocarbons of workers with those of related taxa. Our study illustrates the benefits of using an integrative taxonomic approach to describe new taxa and the pitfalls of using soldier morphology as the exclusive set of characters in termite systematics.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
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