Jaroslav Šidak, 1903-1986

Chapter XIX Object - Relational Modeling Jaroslav

IntroductIon Modeling techniques play an important role in the development of database applications. Well-known entity-relationship modeling and its extensions have become a widely-accepted approach for relational database conceptual design. An object-oriented approach has brought a new view of conceptual modeling. A class as a fundamental concept of the object-oriented approach encapsulates bo...

GEOMETRIES Jaroslav Ježek First edition , April 2008

1986 , Volume , Issue Apr-1986

John von Neumann 1903 - 1957

If influence of a scientist is interpreted broadly enough to include impact on fields beyond science proper then John von Neumann was probably the most influential mathematician ever lived: not only did he contribute to almost all branches of modern mathematics and created new fields but he also changed history after the second World War by his work in computer design and by being a sought-afte...

George Wells Beadle (1903-1989)

George Wells Beadle [3] studied corn, fruit flies, and funguses in the US during the twentieth century. These studies helped Beadle earn the 1958 Nobel Prize in Physiology or Medicine [4]. Beadle shared the prize with Edward Tatum for their discovery that genes [5] help regulate chemical processes in and between cells. This finding, initially termed the one gene-one enzyme hypothesis, helped sc...