Business information system Essay Example | Topics and Well Written Essays - 500 words

Business information system - Essay Example In this paper we will discuss different aspects of data warehouse. This section will explain four main characteristics of data warehouse. These characteristics give a more clear view of data warehouse. First characteristic of data warehouse is â€Å"Subject Oriented† (Kimball & Ralph 2002), It means data warehouse should be built for a specific subject or domain. It also means that Data that provides information about the concerning topic/ subject instead of organizations ongoing processes. Second characteristic is â€Å"integrated† nature of data warehouse. It Means data that is gathered from different sources are integrated into a single structure. Third characteristic is â€Å"Time-variant†: It means all data that is stored in the data warehouse is recognized with a specific time period. Forth and last characteristic is â€Å"Non-volatile† nature of data warehouse. Data is never deleted from data warehouse. But when it exceeds from a certain level, it is archived and stored at differ places (Kimball & Ralph 2002). There is a question about data warehouse: When data warehouse has data in terabits, then how it can handle such amount of data? The answer is: data warehouse uses parallelism approach to handle such amount of data. By this approach data is divided into small parts and parallel unit of data warehouse store retrieve and process them individually (Inmon 1995). Architecture of data warehouse consists of different logical layers (Inmon 1995). First layer is input or source layer, then processing layer, out put layer, decision support layer, etc. At source layer we have our data sources; these can be data bases, legacy system or data from web. After extracting this data from the source a process of transformation is applied on it to bring it into coherent format. Because data can be extracted from any type of sources, it contains

The Complications of Implant Supported Fixed Prosthetics Article

The Complications of Implant Supported Fixed Prosthetics - Article Example Increased masticatory efficiency and lack of tissue contact are the key functional and biological advantages in the use of implant-supported fixed prosthetics. These implant-supported fixed prosthetics function with similarity to the natural denture of the patients and patients appreciate the near normal functionality with such implant restorations. Furthermore, there is greater self-image and self-confidence that results from the feeling and confidence of these implant restorations. In the case of such fixed prostheses, there is no requirement for mucosal support. The prosthesis is totally supported by the implant abutment unit, which removes the possibility of prosthesis movement. As a result, any possible tissue irritation due to prosthesis movement is completely removed (Stevens, Fredrickson & Gress, 2000). Implant supported prostheses for the rehabilitation of complete or partial edentulism comprises either of removable or fixed restorations. Commonly employed implant-supported fixed prosthesis is made up of a metal substructure and a ceramic veneer. Several studies support the long-term success of such fixed implant-supported restorations, though the risk of failure of implant-supported fixed prosthetics from complications of the procedure has been less defined. There is also the element of high costs that are associated with implant-supported fixed prosthetics. These two factors make it relevant for a better understanding of the risk of failure that arises from the complications of implant-supported fixed prosthetics (Kinsel & Lin, 2009). Implant abutments customized to patient needs are becoming more and more popular in implant-supported fixed prosthetics, which target replicating the natural situation. Such abutments are shaped in keeping with the individual anatomical requirements of the site of the implant.