Monday, April 28, 2008

Pre-Columbian Islamic contact theories

Pre-Columbian Islamic contact theories are theories which contend that medieval Muslim explorers from the Islamic world (specifically Al-Andalus, Africa or China) may have reached the Americas (and possibly made contact with the indigenous peoples of the Americas) at some point before Christopher Columbus' first voyage to the Americas in 1492. Proponents of these theories cite as evidence reports of expeditions and voyages conducted by Muslim navigators and adventurers who they allege reached the Americas from the late 9th century onwards

Monday, April 21, 2008

Cargo

Carg is a term used to denote goods or produce being transported generally for commercial gain, usually on a ship, plane, train, van or truck. Nowadays containers are used in most intermodal long-haul cargo transport.

Cargo represents a concern to U.S. national security. It was reported out of Washington, DC that in 2003 over 6 million cargo containers are entering the United States each year. After the terrorist attacks of September 11th, the security of this magnitude of cargo has become highlighted. The latest US Government response to this threat is the CSI: Container Security Initiative. CSI is a program intended to help increase security for containerized cargo shipped to the United States from around the world.

Monday, April 14, 2008

Computer-aided software engineering

Computer-aided software engineering (CASE) is the use of software tools to assist in the development and maintenance of software. Tools used to assist in this way are known as CASE Tools.

Some typical CASE tools are:

* Code generation tools

* Data modeling tools

* UML

* Refactoring tools

* QVT or Model transformation Tools

* Configuration management tools including revision control

Monday, April 07, 2008

Alpha Five

Alpha Five relational database management system and Rapid Application Development system (RAD) for building Windows desktop and Web (including AJAX) applications.

It is created by Alpha Software, Inc., which has been continually producing end-user and developer database application software since 1982. Finalist in the DR Dobbs JOLT awards for 2008 as the Best Development environment with Alpha Five v8 and winner of Product of the Year award from CRN. Applications can be created against its built-in DBF engine and against MySQL, Oracle, MS SQL Server, DB2, Enterprise DB, Postgress and any other SQL database engines through ODBC sources. The latest version now incorporates Portable SQL, a feature that allows users to switch database back ends without having to rewrite queries.

Friday, April 04, 2008

Relational model

The relational model for database management is a database model based on predicate logic and set theory. It was first formulated and proposed in 1969 by Edgar Codd with aims that included avoiding, without loss of completeness, the need to write computer programs to express database queries and enforce database integrity constraints. "Relation" is a mathematical term for "table", and thus "relational" roughly means "based on tables". It did not originally refer to the links or "keys" between tables, contrary to popular interpretation of the name.