Within the KBS Virtual Classroom Project we strive to develop a con-structivistic learning environment supported by internet technology. This paper surveys constructivistic concepts, and evaluates our learning environment for a two semester course \Introduction to Programming/CS1".

Deep submicron strained-Si n-MOSFET’s were fabricated on strained Si/relaxed Si0 8Ge0 2 heterostructures. Epitaxial layer structures were designed to yield well-matched channel doping profiles after processing, allowing comparison of strained and unstrained Si surface channel devices. In spite of the high substrate doping and high vertical fields, the MOSFET mobility of the strained-Si devices ...

We show that any PSLG with v vertices can be tri angulated with no angle larger than by adding O v log v Steiner points in O v log v time We rst triangulate the PSLG with an arbitrary con strained triangulation and then re ne that triangula tion by adding additional vertices and edges We fol low a lazy strategy of starting from an obtuse angle and exploring the triangulation in search of a sequ...

This study is an attempt to generalize in dimension higher than two the mathematical results in [8] (Computing the equilibrium con guration of epitaxially strained crystalline lms, SIAM J. Appl. Math. 62 (2002), no. 4, 1093 1121) by E. Bonnetier and the rst author. It is the study of a physical system whose equilibrium is the result of a competition between an elastic energy inside a domain and...

A multi-product newsboy problem with uncertain demand and uncertain storage space is investigated under a warehousing chance constraint. It is assumed that indeterminacy may appear in demand and storage space due to rough estimation of their distributions by decision-maker. Uncertainty theory provides a new tool to deal with the human uncertainty. We develop an uncertain expected value programm...

The computation problem is discussed for the stochastic chance-constrained linear programming, and a novel direct algorithm, that is, simplex algorithm based on stochastic simulation, is proposed. The considered programming problem in this paper is linear programming with chance constraints and random coefficients, and therefore the stochastic simulation is an important implement of the propose...

We study here a problem of scheduling n job types on m parallel machines, when setups are required and the demands for the products are correlated random variables. We model this problem as a chance constrained integer program. Methods of solution currently available { in integer programming and stochastic programming { are not suucient to solve this model exactly. We develop and introduce here...

We describe in this article an abductive procedure based on a constrained resolu tion principle The choice of constrained resolution is motivated by the whish to gain full advantage of using rei ed tempo ral logics For this purpose it is interest ing to deal e ciently with temporal order ing and equality relation between instants The constrained resolution principle de scribed here is a solutio...

Practical reasoning (PR), which is concerned with the generic question of whatto do, is generally seen as a two steps process: (1) deliberation, in which an agentdecides what state of affairs it wants to reach –that is, its desires; and (2) means-ends reasoning, in which the agent looks for plans for achieving these desires.The agent’s intentions are a consistent set of desi...