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.

(Cross-)Browser Fingerprinting via OS and Hardware Level Features.

Abstract: In this paper, we propose a browser fingerprinting technique that can track users not only within a single browser but also across different browsers on the same machine. Specifically, our approach utilizes many novel OS and hardware level features, such as those from graphics cards, CPU, and installed writing scripts. We extract these features by asking browsers to perform tasks that rely on corresponding OS and hardware functionalities. Our evaluation shows that our approach can successfully identify 99.24% of users as opposed to 90.84% for state of the art on single-browser fingerprinting against the same dataset. Further, our approach can achieve higher uniqueness rate than the only cross-browser approach in the literature with similar stability.

An observational correlation between stellar brightness variations and surface gravity

Abstract: An analysis of archival data reveals an observational correlation between stellar brightness variations and surface gravity, allowing a determination of surface gravity with a precision of better than 25 per cent for inactive Sun-like stars at main-sequence to giant stages of evolution. Variations in the brightness of solar-type stars are driven by many factors including granulation, a consequence of heat convection below the photosphere. And as granulation is correlated with surface gravity, variations in brightness can be used as a measure of surface gravity. Fabienne Bastien et al. analyse archival data from NASA's Kepler mission and show that brightness fluctuations on timescales of less than 8 hours are correlated with the surface gravity in Sun-like stars in various evolutionary phases. Using straightforward measurements of this type it should be possible to determine the surface gravities of many of the stars observed by Kepler. Surface gravity is a basic stellar property, but it is difficult to measure accurately, with typical uncertainties of 25 to 50 per cent if measured spectroscopically1,2 and 90 to 150 per cent if measured photometrically3. Asteroseismology measures gravity with an uncertainty of about 2 per cent but is restricted to relatively small samples of bright stars, most of which are giants4,5,6. The availability of high-precision measurements of brightness variations for more than 150,000 stars7,8 provides an opportunity to investigate whether the variations can be used to determine surface gravities. The Fourier power of granulation on a star’s surface correlates physically with surface gravity9,10: if brightness variations on timescales of hours arise from granulation11, then such variations should correlate with surface gravity. Here we report an analysis of archival data that reveals an observational correlation between surface gravity and root mean squared brightness variations on timescales of less than eight hours for stars with temperatures of 4,500 to 6,750 kelvin, log surface gravities of 2.5 to 4.5 (cgs units) and overall brightness variations of less than three parts per thousand. A straightforward observation of optical brightness variations therefore allows a determination of the surface gravity with a precision of better than 25 per cent for inactive Sun-like stars at main-sequence to giant stages of evolution.

School‐based Intervention for Children with Attention Deficit Hyperactivity Disorder: Effects on academic, social, and behavioural functioning

Abstract: Children with Attention Deficit Hyperactivity Disorder (ADHD) exhibit significant academic, social, and behavioural difficulties in school settings. This article reviews empirical findings regarding the effects of classroom interventions for students with ADHD. Three major types of interventions are reviewed including behavioural (e.g., token reinforcement, response cost), academic (e.g., peer tutoring), and social (e.g., social skills training). Relatively strong evidence supports the use of behavioural interventions in reducing disruptive, off‐task behaviours in children with ADHD. Evidence for academic and social interventions with this population is weaker, but recent findings indicate that these are potentially effective treatments. Implications of this review for clinical practice and future research are discussed.

The Competencies and Characteristics Required of an Effective Project Manager: A Web-Based Delphi Study

Abstract: In this study, we explore the competencies required for a project manager to be effective in the workplace. We used a Web-based Delphi method to lead experienced project managers through an anonymous consensus-building process consisting of two rounds of surveys. The Round I analysis of 147 respondents, all with 20 or more years of project management experience, yielded 117 project management success factors, 78 of which were identified as trainable competencies. The Round II analysis confirmed 42 of the 78 competencies (53.8%) as very important to extremely important to project manager success. Important contributions of this study include: (a) reporting on project manager competencies that can inform the literature and guide the development of educational programs for instructional designers and other professionals, and (b) demonstrating the Web-based Delphi technique to be an efficient methodology for conducting afront-end analysis, a core process of instructional design (ID) work.

III-Nitride Photonics

Abstract: The progress in III-Nitride photonics research in 2009 is reviewed. The III-Nitride photonics research is a very active field with many important applications in the areas of energy, biosensors, laser devices, and communications. The applications of nitride semiconductors in energy-related technologies include solid-state lighting, solar cells, thermoelectric, and power electronics. Several new research areas in III-Nitride photonics related to terahertz photonics, intersubband quantum wells, nanostructures, and other devices are discussed.