Le gaz de mine, ou « grisou », est un résidu l’extraction du charbon, responsable d’accidents mortels pour les mineurs. Les émissions ce gaz, qui ne s’arrêtent pas avec la cessation des activités minières, engendrent risques d’explosion en surface et d’importantes pollutions atmosphériques. Au sein bassin minier Nord-Pas-de-Calais, le héritage emblématique passé charbonnier, désormais appréhend...

Expertise is a prerequisite for communicator credibility, entailing the knowledge and ability to be accurate. Trust also is essential to communicator credibility. Audiences view trustworthiness as the motivation to be truthful. Identifying whom to trust follows systematic principles. People decide quickly another's apparent intent: Who is friend or foe, on their side or not, or a cooperator or ...

Purpose: Fine wines challenge the consumer to know them and form a meaningful willingness to pay (WTP) for them. Given the wine consumer’s problem of knowing what she is buying, Nelson’s (1970) idea of “experience goods” might apply—goods that must be “experienced” to be accurately evaluated. Lacking own knowledge, consumers might use expert opinion to guide their WTP. However, the evidence of ...

This paper presents preliminary results of bedrock mapping in the Taseko Lakes area. This work represents part of a Master’s project funded by International Jaguar Equities (JAG), NWC Exploration Inc. and the University of British Columbia. Fieldwork was completed over two summers; two months of reconnaissance mapping in 1998 and two and a half months of more detailed 1:15 000-scale mapping in ...

Choice questions, sometimes called stated-choice questions or attribute-based choice questions, along with data on observed fishing behavior, are used to estimate anglers’ willingness to pay (WTP) to reduce or remove Green Bay FCAs. A choice question presents an individual with a number of alternatives, each described in terms of the levels of their common set of characteristics, and asks the i...

Web-mapping services, like Google Maps, allow natural language queries, like “Hotels Freiburg”. These queries are interpreted as “Hotels in Freiburg” or “Hotels near Freiburg”. In this thesis, we introduce the two new spatial relation “between” and the compass directions, allowing queries like “Gas stations between Freiburg and Stuttgart” or “Hotels north of Freiburg”. To achieve this, we analy...

In this article we discuss three issues that should be considered important in future studies of willingness to pay (WTP) for services in digital networks. First, existing studies of WTP for digital services have several weaknesses when it comes to contextand incentive realism and we suggest alternative methods to overcome these weaknesses. Second, a review of existing studies of WTP for digita...

Cet article prŽsente une Žtude de la dynamique dÕun rŽservoir biphasique multiconstituant approchant le rŽgime dՎcoulement stationnaire. En premier lieu, nous procŽdons ˆ une approximation linŽaire du modle compositionnel dans le cas des petites fluctuations autour du rŽgime permanent. Une expression analytique est ainsi obtenue pour le temps caractŽristique de transition. Des simulations num...

Q. s. Yuan Electricite de France centre des Renardieres Departement Application de l'Electricite 77250 Moret sur Laing, France Noncondensable gases in a condenser will reduce the heat transfer coefficient and this is the case of the mixture (steam + air) j Rll4 heat exchanger in our high temperature heat pump. This heat exchanger is a shell tube type and is for the purpose of simulating industr...

Alüminyum fosfit günümüzde tar?m ilaçlar? aras?nda en s?k görülen zehirlenme nedenlerinden biridir. zehirlenmesi son derece öldürücüdür ve ne yaz?k ki, belirli bir panzehirin yoklu?u çok yüksek ölüm oranlar?na neden olur. topaklar?, su veya nem ile reaksiyona girerek, toksisitenin primer sorumlusu olan fosfin gaz?n? olu?turur. gaz? güçlü mitokondriyal toksindir sitokrom c oksidaz enzimini inhib...