When designing or modifying a test, an important challenge is controlling its speededness. To achieve this, van der Linden (2011a, 2011b) proposed using lognormal response time model, more specifically the two-parameter and automated test assembly (ATA) via mixed integer linear programming. However, this approach has severe limitation, in that model lacks slope parameter. This means assumes all...

Introduction . Small-leaved linden flowers are mainly used for aquatic extracts, and their pharmacological benefit is based on water-soluble polysaccharides. Aim. The aim of this study was to investigate the rate accumulating all reducing sugars in small-leaved flowers, collected agro- urbo-cenoses Voronezh region. Materials methods. 51 sites were selected collecting from linden, which a widesp...

In the first part of th~ essay, I considered various forms of meditation and the ways in which they seem to affect human physiology. 1 This second part will deal with medhation and its effects on learning and creativity. As noted earlier, proponents claim that the daily practice of meditation provides many benefits, includlng relief from the harmful consequences of stress and anxiety. Scientist...

Virtual Environments (VEs) are currently being used in an increasingly wide range of areas such as simulations (Snowdon, Churchill, & Munro, 2001), games (Torres, 2008), business (Lanier & Biocca, 1992) and decision making (Lurie & Mason, 2007). One of the most popular commercialized shared virtual environment systems is SecondLife (Linden Lab, 2003). SecondLife is an Internet-based virtual wor...

To the article ''Thia-Diels–Alder reactions of hetaryl thioketones with nonactivated 1,3-dienes leading to 3,6-dihydro-2H-pyrans: evidence for a diradical mechanism'' by Grzegorz Mlostoń, Paulina Grzelak, Anthony Linden, Heinz Heimgartner