In network-centered execution environments, client objects can transparently invoke services offered by remote server objects, according to their published interface. The object selection problem requires the evaluation of the fitness of a pool of candidate server objects on the basis of the available information about their functional and nonfunctional features. Network-centered systems usuall...

The impact of commercial airplane crashes on the shareholder wealth US-listed airline stocks has been focus many prior studies, but none have explored concomitant trading volume. We expand scope studies to include near crashes. examine 262 ‘incidents’ from 1962 2018 (220 with return evidence) and document a significant (negative) for fatalities casualties, an insignificant incidents no casualti...

background: in dental practical classes, the acoustic environment is characterized by high noise levels in relation to other teaching areas. the aims of this study were to measure noise levels produced during the different dental learning clinics, by equipments used in dental learning areas under different working conditions and by used and brand new handpieces under different working condition...

Does encouraging trader participation enhance market competitiveness? This paper shows that, when trader preferences are interdependent, trader market power does not necessarily decrease with greater participation, and traders need not become price takers in large markets. Thus, larger markets can be less liquid and associated with lower ex ante welfare. In the linear-normal model, the necessar...

This paper describes how introducing statistical dependency among trader values changes the equilibrium bidding strategies in bilateral k-double auctions and uses the special case of affiliation to illustrate the range of equilibrium responses to a change in the value distribution. Consistent with standard intuition, a change from independent to strictly affiliated valuations can result in high...

Most e-commerce exchange systems today facilitate a single simple transaction. Systems allow the trade of an object or resource for exactly one other object or resource. The trade could also be for some quantity of one object or resource for another, but usually all of the objects traded are of a kind, for example, trading 10 iPods. The common type of exchange involves money for an object. Ther...

An open distributed environment can be perceived as a service market where services are freely o ered and requested. Any infrastructure which seeks to provide appropriate mechanisms for such an environment has to include mediator functionality (i.e. a trader) that matches service requests and service o ers. Commonly, the matching process is based upon some IDL{based service type de nition, and ...

  Abstract   Background: Previous studies have indicated an unspecific correlation between noise   exposure and blood pressure disturbances. Blood pressure disturbances could be caused   by the environmental hazards such as noise exposure. The aim of this study is to analyze   whether there is a relationship between noise exposure and hypertension.   Methods: Atotal sample of 218 workers workin...