Time Variation of Orbital Parameters of an Equatorial Satellite

A few orbital parameters which take into account earth's finite shape as well as its axial rotation are developed for a satellite moving in the earth's equatorial plane. Expressions for line of sight velocity dr/sub es//dt, variation of elevation angle, and the condition for satellite's accessibility from a ground station are obtained. For a non-rotating earth equations for variation of arc length D/sub c/ and segment area A/sub s/ are derived. The various parameters are plotted against time for different orbital eccentricities

Optimization Problem of a Sea vehicle Entry into Water

For a vehicle diving into the sea, the variation of velocity with horizontal distance covered was studied, the conditions being that the vehicle requires minimum time and that the horizontal distance is fixed. The variation of the vehicle's trajectory angle and time versus depth was also investigated. The variational problem makes use of the isoperimetric condition. The second-order differential equation was solved by the Runge-Kutta-Nystrom. method and the isoperimetric condition by Simpson's rule

Optimisation Problem of Entry into Earth's Atmosphere

A study has been carried out on the variation of velocity, time, re-entry angle and distance along the horizontal with altitude for a re-entry vehicle diving into the earth's atmosphere, using the improved version of Marinescu's model that accounts for gravity and assuming that the distance along the earth's surface is fixed. More specifically, after formulating the problem as an isoperimetric one, its Euler-Lagrange equation, which turned out to be a highly nonlinear differential equation of the second order, has been solved via Runge-Kutta method and Simpson's rule for some physically realisable values of the parameters involved

Combining real and virtual Higgs boson mass constraints

Within the framework of the standard model we observe that there is a significant discrepancy between the most precise $Z$ boson decay asymmetry measurement and the limit from direct searches for Higgs boson production. Using methods inspired by the Particle Data Group we explore the possible effect on fits of the Higgs boson mass. In each case the central value and the 95% confidence level upper limit increase significantly relative to the conventional fit. The results suggest caution in drawing conclusions about the Higgs boson mass from the existing data.Comment: 11 pages, Latex. Citations are added and paper is otherwise reconciled with version to be published in Physical Review Letter

The Impact of σ(e+e−→hadrons)\sigma(e^+e^-\to {hadrons}) Measurements at Intermediate Energies on the Parameters of the Standard Model

We discuss the impact of precision measurements of $\sigma(e^+e^-\to {hadrons})$ in the center-of-mass range between 3 and 12 GeV, including improvements in the electronic widths of the narrow charmonium and bottonium resonances, on the determination of parameters of the Standard Model. In particular we discuss the impact of potential improvements on the extraction of the strong coupling constant $\alpha_s$, on the evaluation of the hadronic contributions to the electromagnetic coupling $\alpha(M_Z)$, and the determination of the charm and bottom quark masses.Comment: 8 page

The Indirect Limit on the Standard Model Higgs Boson Mass from the Precision FERMILAB, LEP and SLD Data

Standard Model fits are performed on the most recent leptonic and b quark Z decay data from LEP and SLD, and FERMILAB data on top quark production, to obtain $m_t$ and $m_H$. Poor fits are obtained, with confidence levels $\simeq$ 2%. Removing the b quark data improves markedly the quality of the fits and reduces the 95% CL upper limit on $m_H$ by $\simeq$ 50 GeV.Comment: 6 pages 3 tables i figur

Rapid Methods for Estimating Protein and Lysine in Sorghum (Sorghum bicolor (L.) Moench).

Sorghum (Sorghum bicolor (L.) Moench) samples were analyzed for protein by the Technicon auto analyzer (TAA) method, and the results were compared with the micro-Kjeldahl method. The TAA method was highly and significantly correlated (r = 0.997**) with the micro-Kjeldahl method, and the results were found to be highly reliable for routine screening of samples. Lysine was estimated by the rapid dye-binding capacity (DBC) procedure and was determined using an amino-acid analyzer. The results of the DBC procedure, when expressed as a ratio with respect to the protein content, were highly and positively correlated (r = 0.933**) with the amino-acid analyzer values. The rapid procedures of TAA and DBC were observed to give reliable estimates of protein and lysine content, respectively, and are recommended when large numbers of sorghum samples are to be analyzed

Polyphenols in Groundnut Genotypes Resistant and Susceptible to Seed Colonization by Aspergillus flavus

Thirteen groundnut genotypes, eight resistant and five susceptible to in vitro seed colonization by Aspergillus flavus were grown in replicated trials at three locations in Andhra Pradesh, India. Seed coats of these genotypes were analyzed for polyphenols using different methods. No significant correlation was observed between seed colonization and polyphenols content, which corroborates earlier observations on many genotypes using a single method for polyphenols estimation

Phylogenetic relationships in the genus Arachis based on seed protein profiles

Seed protein profiles of 19 accessions representing seven sections of the genus Arachis were studied using sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The general profile showed appreciable homology between these taxa, supporting their classification based on morphology and cross-compatibility relationships. The accessions of section Arachis expressed a high variation confirming inferences from earlier studies. Variation between accessions of a species is limited. Accessions of the section Ambinervosae and Caulorhizae formed one cluster and accessions of sect. Erectoides and Procumbensae formed another. Whereas the representative accessions of sect. Triseminalae and Extranervosae formed two independent clusters. Using the percentage of dissimilarity in electrophoretic bands as a statistical genetic distance between accessions, sect. Arachis (containing the cultivated groundnut, A. hypogaea) is phylogenetically closest to sect. Erectoides followed by Procumbensae, Ambinervosae, Caulorhizae, Triseminalae and Extranervosae, respectively

Variation in a wild groundnut species, Arachis duranensis Krapov. & W.C. Gregory

Forty-two accessions of Arachis duranensis, a wild groundnut species that has been reported as a source of resistance to several groundnut diseases, were studied for 30 quantitative traits including total protein content, oil content, and reaction to groundnut rust. Protein profiles were also investigated for variation at the molecular level. Principal component analysis was applied to 28 traits that showed significant variation. Of these, only five characters, namely, height of the main stem, length of apical leaflet on the main stem, length of isthmus between pods, width of seed, and reaction to groundnut rust, accounted for more than 61.4% of the total variation. Protein profiles of these accessions were broadly similar, except some accessions which differed in few bands. The importance of these variations in strategies for germplasm collection and breeding is discussed