Lehigh University

About: Lehigh University is a education organization based out in Bethlehem, Pennsylvania, United States. It is known for research contribution in the topics: Catalysis & Fracture mechanics. The organization has 12684 authors who have published 26550 publications receiving 770061 citations.

ADHD in college students.

Abstract: Objective: According to the American Psychiatric Association, 3% to 7% of the school-age population has ADHD and many children continue to display significant symptoms throughout adolescences and a...

The Bending of Plates of Dissimilar Materials With Cracks

Abstract: This paper considers the problem of bending of a plate composed of two plates of materials having dissimilar elastic properties, bonded together along a straight line which sustains a crack. Both materials are assumed to be isotropic and, homogeneous. Upon obtaining stress solutions, it is found that the significant stresses are inversely proportional to the square root of the radial distance from the crack front and have an oscillatory character, which is shown to be confined to the immediate vicinity of the crack tip. A two-parameter set of equations expressing the general form of the stress distribution around the tip of such a crack is provided as it is of primary importance in predicting the strength of cracked plates. Some analogies are also observed between the characteristic equations occurring in the extension and bending of cracked plates composed of dissimilar materials.

Negative-U Properties for Point Defects in Silicon

Abstract: Experimental evidence is presented in support of a recent suggestion by Baraff, Kane, and Schl\"uter that the isolated lattice vacancy in silicon is an Anderson negative-$U$ system The second donor level (+/++) (of charge state + if defect level is occupied by an electron; ++, if unoccupied) is located at ${E}_{v}+013$ eV, above a first donor level (0/+) at ${E}_{v}+005$ eV Evidence is presented that interstitial boron has negative-$U$ properties with a single donor level (0/+) at ${E}_{c}\ensuremath{-}013$ eV, above a single acceptor level (-/0) at ${E}_{c}\ensuremath{-}045$ eV

Reprogramming wireless sensor networks: challenges and approaches

Abstract: Wireless sensor networks need an efficient and reliable reprogramming service to facilitate management and maintenance tasks. In this article we first outline a framework to examine different functions in reprogramming, followed by an analysis of reprogramming challenges. We then provide a comprehensive survey of the state-of-the-art reprogramming systems, and discuss different approaches to address these challenges. Finally we explore performance, protocol behavior, and the impact of several design factors.

Facility Location in Supply Chain Design

Abstract: In this chapter we outline the importance of facility location decisions in supply chain design. We begin with a review of classical models including the traditional fixed charge facility location problem. We then summarize more recent research aimed at expanding the context of facility location decisions to incorporate additional features of a supply chain including LTL vehicle routing, inventory management, robustness, and reliability.