Games & Learning We are well aware that video games are ca using educators to take a second l ook at t he e ducational value o f games, technology, and the social interactions involved (de Castell & Jenson, 2004; Gee, 2 003; Shaffer, Squire, Halverson, & Gee, 2005) but what does that learning look like, how does that l earning o r way of knowing happen, and what do the gamers h ave to say abou ...

The latter two principles protect the soil resource on which all food and fibre production ultimately depends. However, agricultural production systems differ from ‘natural’ or undeveloped systems in that they can be considered to be ‘leaky’ with respect to nutrients. This is inevitable, due to nutrient removal in harvested product, but inappropriate fertiliser management can exacerbate the ‘le...

Optimal learning addresses the problem of how to collect information so that it benefits future decisions. For off-line problems, we have to make a series of measurements or observations before choosing a final design or set of parameters; for online problems, we learn from rewards we are receiving, and we want to strike a balance between rewards earned now and better decisions in the future. T...

We have concerned ourselves at the gastroenterology unit of the VU University Medical Center with drug repositioning since 2001. Generic therapy, often successfully used off-label in daily practice and well described in literature in large observational studies, should be further developed for safe and economically viable use. To prevent off-label use legislative authoritiesshouldstimulate re-r...

Switching machines on and off is an important aspect of unit commitment problems and production planning problems, among others. Here we study tight mixed integer programming formulations for two aspects of such problems: bounded length onand off-intervals, and interval-dependent start-ups. For the problem with both these aspects we develop a tight (convex hull) formulation involving additional...

in descriptive statistics, there are two computational algorithms for determining the variance s2, of a set of observations : algorithm 1: s2= - , algorithm 2: s2= , where . it is interesting to discuss, which of the above formulas is numerically more trustworthy in machine numbers sets. i this paper, based on total effect of rounding error, we prove that the second algorithm is better than ...

in reinforced concrete design, there are situations where transfer of shear across a specific plane needs to be considered. examples of such situation include corbels, bearing shoes, ledger beam bearing, and a host of connection between precast concrete elements. in this study, the shear transfer behavior of reinforced concrete is investigated experimentally by conducting test on 6 precracked p...

BACKGROUND There is a growing consensus about the importance of mental health screening of youths in welfare and juvenile justice institutions. The Massachusetts Youth Screening Instrument-second version (MAYSI-2) was specifically designed, normed and validated to assist juvenile justice facilities in the United States of America (USA), in identifying youths with potential emotional or behavior...

in the open-pit mining, one of the first decisions that must be made in production planning stage, after completing the design of final pit limits, is determining of the processing plant cut-off grade. since this grade has an essential effect on operations, choosing the optimum cut-off grade is of considerable importance. different goals may be used for determining optimum cut-off grade. one of...