This talk is meant as a wake-up call ... The foundation of the database field is, of course, the relational model. Sad to say, however, there are some in the database community—certainly in industry, and to some extent in academia also—who do not seem to be as familiar with that model as they ought to be; there are others who seem to think it is not very interesting or relevant to the day-today...

Thorough understanding of steel rail response to wheel load is a key step towards design and evaluation of the railway track structure. In current practice, maximum vertical deflection and bending moment are calculated using the theory of infinite beam on continuous elastic foundation (Winkler model), in which the foundation stiffness is assumed as constant. However, variation of track modulus ...

The soil-foundation interaction is one of the most important issues in geotechnical engineering that deals with studying the soil behavior subjected to the side loading. Winkler’s model is the first and simplest method for consideration of the soil-foundation interaction. It is vitally important to determine the coefficient of subgrade reaction of the soil. Since several methods have been prov...

We consider the flavor changing neutral current(FCNC) process e+e− → t̄c(or tc̄) in the context of topcolor-assisted technicolor(TC2) models. We find that the contributions of charged scalars (technipions and top-pions) and topcolor gauge bosons are negligibly small. The neutral scalars (top-pion π0 t and top-Higgs h 0 t ) can give significant contributions to this process. With reasonable values...

Security of distributed systems requires both technical and administrative foundations. Technical foundation is based on cryptographic measures and access control models, and is considerable well understood. Administrative foundation is based on several nontechnical layers added on top of technical communication protocols. Several models for secure interconnection of information systems suggest...

Numerous techniques have been presented by different researchers to analyze piled raft. In order to analyze pile foundation, soil can be modeled as spring, continuous medium, or porous media. Pile can also be modeled as spring or continuous medium. This study includes three main stages: a short description of different types of analysis methods of pile foundation, writing a computer program bas...

Previous geo-referencing approaches for building information modeling (BIM) models can be problematic due to: (a) the different interpretations of term ‘geo-referencing’, (b) insufficient consideration placement hierarchy industry foundation classes (IFCs), and (c) misunderstanding that a common way to embed spatial reference IFC is absent. Therefore, objective this study (1) clarify meaning in...