A grid is concerned with the integration, virtualization, and management of services and resources in a distributed, heterogeneous environment that supports virtual organizations across traditional administrative and organizational domains. Spatial data infrastructures (SDI) aim to make spatial data from multiple sources available and usable to as wide an audience as possible. The first SDIs of...

hydrological drought analysis using sdi index in halilrud basin of iran abstract nowadays, drought is considered as damaging environmental phenomenon which affects natural resources and social communities. therefore it will be an important issues that magnitude and effects of these phenomena to be considered. to do this we used l-moment method for regional homogeneity testing. the streamflow dr...

selective dissemination of information (sdi) is important in quick and update availability to information. sdi has also critical role in producing of knowledge. in this article has been explained one of the new information technology about sdi. at this survey has been explained about rss, rss feeds. rss readers (news aggregators), and also about install of feed reader (one of the rss readers). ...

BACKGROUND Many patients with electrical dyssynchrony who undergo cardiac resynchronization therapy (CRT) do not obtain substantial benefit. Assessing mechanical dyssynchrony may improve patient selection. Results from studies using echocardiographic imaging to measure dyssynchrony have ultimately proved disappointing. We sought to evaluate cardiac motion in patients with heart failure and elec...

The advantages and disadvantages of subsurface drip irrigation (SDI) as compared to alternative irrigation systems are conceptually discussed. Each category (advantages and disadvantages) is subdivided into three groups: 1) Water and soil issues; 2) Cropping and cultural practices, and 3) System infrastructure issues. The adaptation and adoption of SDI systems into diverse cropping systems, geo...