On characterizing N-matrices using linear complementarity

AbstractWe show that a square matrix A with at least one positive entry and all principal minors negative can be characterized in terms of the number of solutions the linear complementarity problem (q,A) with the matrix A has for different vectors q. Such a matrix can also be characterized in terms of a sign nonreversal property. These results complement the known results for a square matrix A<0 with all its principal minors negative

Kinetic Turbulence

The weak collisionality typical of turbulence in many diffuse astrophysical plasmas invalidates an MHD description of the turbulent dynamics, motivating the development of a more comprehensive theory of kinetic turbulence. In particular, a kinetic approach is essential for the investigation of the physical mechanisms responsible for the dissipation of astrophysical turbulence and the resulting heating of the plasma. This chapter reviews the limitations of MHD turbulence theory and explains how kinetic considerations may be incorporated to obtain a kinetic theory for astrophysical plasma turbulence. Key questions about the nature of kinetic turbulence that drive current research efforts are identified. A comprehensive model of the kinetic turbulent cascade is presented, with a detailed discussion of each component of the model and a review of supporting and conflicting theoretical, numerical, and observational evidence.Comment: 31 pages, 3 figures, 99 references, Chapter 6 in A. Lazarian et al. (eds.), Magnetic Fields in Diffuse Media, Astrophysics and Space Science Library 407, Springer-Verlag Berlin Heidelberg (2015

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Not AvailableA field experiment was conducted during rabi 2011 at Research farm, Regional Agriculture Research Station (RARS), Bijapur on a deep black soil under rainfed condition to study the effect of different tillage practices imposed during kharif and different nitrogen sources on rabi sunflower growth and yield. Tillage practices had no significant effect on growth and yield of sunflower crop. Yield components like number of seeds per head (1068.6) and seed weight per head (55.1 g) were significantly higher with the minimum tillage while tillage practices did not show significant influence on seed yield and stalk yield. Sunflower fertilized with 100% recommended dose of fertilizer (RDF) recorded significantly higher germination percentage, plant height, number of leaves, leaf area index, dry matter production than rest of the treatments. Yield attributes viz. head diameter (10.6 cm) and number of seeds per head (1174.8) were significantly higher with 100% RDF (35:50:35 N: P2O5 : K2O kg ha -1 ) but on par with in- situ sunnhemp green manure incorporation @ 2.5 t ha -1+ 50% recommended dose of nitrogen through urea and in -situ sunnhemp green manure incorporation @ 5 t ha -1. Seed yield (1187 kg ha -1) and stalk yield (2484 kg ha -1) of sunflower were significantly higher with 100% RDF over farmers’ practice (24:30:0 N:P2O5:K2O kg ha -1) but was on par with rest of the treatments. Reducing the tillage intensity did not significantly influence yields and substituting 50% nitrogen through organic sources produced yields comparable to that of inorganic source of nitrogen application.Not Availabl

Antibacterial Defense of Human Airway Epithelial Cells from Chronic Obstructive Pulmonary Disease Patients Induced by Acute Exposure to Nontypeable Haemophilus influenzae: Modulation by Cigarette Smoke

Pathogenesis and treatment of chronic pulmonary disease