Spatial Data Infrastructures (SDIs) have been identified as a mechanism through which complete and consistent spatial data sets can be accessed and retrieved. Whilst SDIs have been developing, wireless communication technologies have been undergoing a rapid evolution. The convergence of wireless communications, positioning technology and SDIs are providing new facilities, new applications and a...

Based on the concepts of composition ring and composition hyperring, in this note we introduce the notion of composition structure for (m,n)-hyperrings and study the connections with composition hyperrings. Moreover we show that particular strong endomorphisms of (m,n)-hyperrings can determine the composition structure of a such (m,n)-hyperrings. Finally, the three isomorphism theorems are pres...

A well understanding on the evaporation characteristics and efficient working area of multi-stage high pressure temperature reducing valve (MSHPTRV) is important for improving performance safety MSHPTRV. The water spraying model are integrated into flow Compared with experimental data, can show thermal process well. interaction between steam droplets presented. On this basis, increase rate entr...

the concept of algebraic hyperstructures introduced by marty as a generalization of ordinary algebraic structures. in an ordinary algebraic structure, the composition of two elements is an element, while in an algebraic hyperstructure, the composition of two elements is a set. the concept of ?-semihyperrings is a generalization of semirings, a generalization of semihyper rings and a generalizat...

* Prevention of hazards is a constant preoccupation for the doctors and nurses who are in charge of ensuring, at first during the medical fitness visit (MFV), that the members of the professional firefighters are medically and psychologically fit, followed by a regular control, in particular of those carrying out specialised activities (mountaineering, scuba-diving, CBRN risks). In France, the ...

vertebrobasilar insufficiency is the cause of cerebrovascular accidents in 20% of cases. there are few reports regarding spectral doppler indices (sdis) of vertebral arteries (vas) normal blood flow. the objective of this study was to provide basic reference data about sdis of vas normal blood flow separately and in comparison with internal carotid arteries (icas) and common carotid arteries (c...

In order to facilitate and coordinate spatial data sharing exchange, many organisations have developed infrastructures (SDIs). SDI governance plays a pivotal role in the developmen...

There are reasons for thinking that obsessive-compulsive disorder (OCD) and drug dependence, although conventionally distinct diagnostic categories, might share important cognitive and neurobiological substrates. We tested this hypothesis directly by comparing brain functional connectivity measures between patients with OCD, stimulant dependent individuals (SDIs; many of whom were non-dependent...