9,628 research outputs found

    Dynamic Resonance Effects in the Statistical Distributions of Asteroids and Comets

    Full text link
    Some principles in the distribution of Centaurs and the "Scattered Disk" objects, as well as the Kuiper belt objects for its semi-major axes, eccentricities and inclinations of the orbits have been investigated. It has been established, that more than a half from them move on the resonant orbits and that is what has been predicted earlier. The divergence of the maximum in the observable distribution of the objects of the Kuiper belt for the semi-major axes with an exact orbital resonance has been interpreted.Comment: 7 pages, 5 figures, 1 table. International Conference "100 years since Tunguska phenomenon: Past, present and future", (June 26-28, 2008. Russia, Moscow), International Conference "Modern problems of astronomy" (August 12-18, 2007, Ukraine, Odessa

    Modelling and Simulation of Tactical Team Behaviour

    Get PDF
    Realistic military simulations are needed for analysis, planning, and training. Intelligentagent technology is a valuable software concept with the potential of being widely used inmilitary simulation applications. They provide a powerful abstraction mechanism required fordesigning simulations of complex and dynamic battlefields. Their ability to model the tacticaldecision-making behaviour of simulated battlefield entities gives them an edge over othertechniques. During battlefield simulation, these entities generally represent individualisticbehaviour, taking operational order from higher control and executing relevant plans. However,since a complex battlefield scenario typically involves thousands of entities, their coordinatedteam behaviour should also be considered to make the simulation more realistic. This paperdemonstrates the use of intelligent agent-based team behaviour modelling concepts in simulatingthe armoured tanks in a tactical masking scenario

    Response of nigella (Nigella sativa L) variety NRCSS AN 1 to different agro-tech- niques

    Get PDF
    A field study was conducted during the winter seasons of 2002-2003 and 2003-2004 to studythe response of nigella (Nigella sativa L.) variety NRCSS AN-1 to different agro-techniquesunder semi-arid conditions. The yield attributes viz. number of capsules/plant, number ofseeds/capsule and 1000 seed weight were significantly high when crop was sown on 15 Octoberfollowed by 1 October sowing. Significantly higher seed yield of 8.84 q/ha was recordedwhen crop was sown on 15 October. The seed yield of 7.86 q/ha was significantly higherwith row spacing of 30 cm. The plant height and number of branches/plant were more atseed rate of 7 and 8 kg/ha and were noticed significantly high as compared to seed ratetreatment of 9 kg/ha. However, the seed yield attributes and seed yield (8.24 q/ha) weresignificantly high at seed rate of 8 kg/ha. The fertilizer dose of 50 kg N, 25 kg P2O5 and 20 kgK2O /ha was found optimum and produced higher seed yield of 7.87 q/ha. The days to 50%flowering was not affected considerably with different treatments. The essential oil contentincreased significantly when crop was sown at wider spacing of 40 cm and with applicationof fertilizer dose of 50 kg N, 25 kg P2O5 and 20 kg K2O /ha. &nbsp

    Morphology and evolution of emission line galaxies in the Hubble Ultra Deep Field

    Full text link
    We investigate the properties and evolution of a sample of galaxies selected to have prominent emission lines in low-resolution grism spectra of the Hubble Ultra Deep Field (HUDF). These objects, eGRAPES, are late type blue galaxies, characterized by small proper sizes (R_50 < 2 kpc) in the 4350A rest-frame, low masses (5x10^9 M_sun), and a wide range of luminosities and surface brightnesses. The masses, sizes and volume densities of these objects appear to change very little up to a redshift of z=1.5. On the other hand, their surface brightness decreases significantly from z=1.5 to z=0 while their mass-to-light ratio increases two-folds. This could be a sign that most of low redshift eGRAPES have an older stellar population than high redshift eGRAPES and hence that most eGRAPES formed at higher redshifts. The average volume density of eGRAPES is (1.8 \pm 0.3)x10^{-3} Mpc^{-3} between 0.3 < z < 1.5. Many eGRAPES would formally have been classified as Luminous Compact Blue Galaxies (LCBGs) if these had been selected based on small physical size, blue intrinsic color, and high surface brightness, while the remainder of the sample discussed in this paper forms an extension of LCBGs towards fainter luminosities.Comment: Accepted, to appear in Ap

    Oseltamivir induced sinus bradycardia: an area of potential concern

    Get PDF
    Oseltamivir was approved for the prevention and treatment of influenza in 1999 by the USFDA (US Food and Drug Administration). The use of Oseltamivir is increasing rapidly all over the world, especially after the 2009 “Swine Flu” pandemic. Less data is published as far as the cardiovascular side effects of Oseltamivir are concerned, but it could be associated with some serious cardiovascular side effects. This study presented a case series of 5 cases suspected to be suffering from seasonal influenza H1N1 (“Swine Flu”), who developed sinus bradycardia while they were on Oseltamivir therapy

    Changing Behaviour: Successful Environmental Programmes in the Workplace

    Get PDF
    There is an increasing focus on improving the pro-environmental attitudes, behaviour and habits of individuals whether at home, in education, traveling, shopping or in the workplace. This article focuses on the workplace by conducting a multi-disciplinary literature review of research that has examined the influence of organisation-based behaviour change initiatives. The review includes only research evidence that measured actual environmental performance (e.g. energy use) rather than solely using self-reported methods (e.g. questionnaires). The authors develop an ‘Employee Pro-Environmental Behaviour’ (e-PEB) framework that contains individual, group, organisational and contextual factors that have predictive relevance across different behaviours and organisations. The review shows that the strongest predictors are environmental awareness, performance feedback, financial incentives, environmental infrastructure management support and training. A key finding from this review is that attitude change is not necessarily a pre-requisite for behaviour change in the workplace

    IRAC Observations of M81

    Get PDF
    IRAC images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presumably caused by extinction, and the latter may be due to cavities in the gas and dust created by supernova explosions. The nucleus appears fainter at 8 um than expected from ground-based 10 um observations made four years ago.Comment: ApJS in press (Spitzer special issue); 15 pages, 3 figures. Changes: unused references removed, numbers and labels in Table 1 change

    Classification of chickpea growing environments to control genotype by environment interaction

    Get PDF
    Cluster analysis was used as a tool to classify chickpea growing environments. Data on time to flowering (days) and seed yield (kg ha-1) for two chickpea international yield trials developed by ICARDA and ICRISAT, and conducted by cooperating scientists during 1985–86 and 1986–87 were used for this study. The GENSTAT hierarchical, agglomerative clustering programme was employed with correlation coefficient as the distance measure and single linkage as the clustering strategy. Results revealed that by characterization of locations, the genotype x location interaction within a cluster/zone was minimized. From the classification, it appears that selection for performance at Tel Hadya-the main research station at ICARDA in Syria—should be relevant to much of Syria, the drier areas of Algeria and parts of the Iberian Peninsula. In absence of sufficient data and high degree of season-to-season variability in weather patterns it was not possible to indicate other key sites which could provide an opportunity for selection of materials for specific adaptation in a group of environments or a zon

    Red cell glucose-6-phosphate dehydrogenase deficiency and haemoglobin variants among ten endogamous groups of Maharashtra and West Bengal

    Get PDF
    Over 900 individuals from ten endogamous groups in the Indian states of Maharashtra and West Bengal were studied for G-6-PD deficiency and haemoglobin variants. The incidence of G-6-PD varied from nil to 17.3%, while that of Hb-S varied from nil to 22.3%. In general, the tribal populations of Maharashtra are characterized by the presence of a high incidence of both Hb-S and G-6-PD deficiency. The caste Hindus showed an absence of Hb-S and rather low G-6-PD deficiency. Immigrant Parsis possessed the highest incidence of G-6-PD deficiency (17.3%)
    • 

    corecore