1. Determinations were made of several physical properties of the viscid and frame silks of the orb-webs built by the spider Araneus sericatus (Cl.). 2. Both types of silk show a breaking stress of approximately 1 GN/m and an initial resilience of approximately 0-35. 3. The breaking extension ratio of viscid silk (A = 3*00) is much greater than that of frame silk (A = i2s), and the viscid silk ...

For a three-year time period beginning in 2001, North Carolina awarded an annual bonus of $1800 to certified math, science and special education teachers working in public secondary schools with either high-poverty rates or low test scores. Using longitudinal data on teachers, we estimate hazard models that identify the impact of this differential pay by comparing turnover patterns before and a...

Einstein’s theory of general relativity is the remarkably successful classical theory of the gravitational force, characterised by Newton’s coupling constant GN = 6.67×10−11m3/(kg s) and a small cosmological constant Λ. Experimentally, its validity has been confirmed over many orders of magnitude in length scales ranging from the sub-millimeter regime up to solar system size. At larger length s...

While radar search and target detection are essential to radar use, most applications also require measurement of target characteristics. These may include target position and velocity, as described in Sections 8.1 through 8.3, and indicators of target size, shape and rotation, as described in Section 8.4. The use of multiple radar to improve measurement accuracy is discussed in Section 8.5. Co...

Measures of adult attachment reflect both respondents' broadly generalized styles as well as bonds with specific attachment figures. Using Cronbach, Gleser, Nanda, and Rajaratnam's (1972) Multivariate Generalizability analyses, the authors estimated the extent to which correlations among attachment, affect, the self, and perceived social support occurred for both styles and bonds. In two studie...

Kirsty L. Nash*, Nicholas A. J. Graham, Simon Jennings, Shaun K. Wilson and David R. Bellwood Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Qld 4811, Australia; Lowestoft Laboratory, Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Lowestoft NR33 0HT, UK; School of Environmental Sciences, University of East Anglia, ...

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Bayesian networks are weighted directed acyclic graphs (DAGs). Layout of DAGs has been studied for many years, with variants of the horizontal layering algorithm of Sugiyama et al. (Sugiyama, Tagawa & Toda 1981) the preferred approach for medium size graphs. Following Gansner et al. (Gansner, Koutsofios, North & Vo 1993) we extend the classic horizontal layering algorithm with an additional ver...

CURRENT SCIENCE, VOL. 104, NO. 7, 10 APRIL 2013 841 P. S. Brahmanand, A. Kumar, S. Ghosh, S. Roy Chowdhury, R. Singh, P. Nanda, S. K. Srivastava and M. S. Behera are in the Directorate of Water Management (ICAR), Bhubaneswar 751 023, India. R. B. Singandhupe is in the Central Institute of Cotton Research, Nagpore 440 010, India. **Late H. Chakraborthy served as Senior Scientist in the Directora...