Multiparametric and coloured extensions of the quantum group GLq(N)GL_q(N) and the Yangian algebra Y(glN)Y(gl_N) through a symmetry transformation of the Yang-Baxter equation

Inspired by Reshetikhin's twisting procedure to obtain multiparametric extensions of a Hopf algebra, a general `symmetry transformation' of the `particle conserving' $R$-matrix is found such that the resulting multiparametric $R$-matrix, with a spectral parameter as well as a colour parameter, is also a solution of the Yang-Baxter equation (YBE). The corresponding transformation of the quantum YBE reveals a new relation between the associated quantized algebra and its multiparametric deformation. As applications of this general relation to some particular cases, multiparametric and coloured extensions of the quantum group $GL_q(N)$ and the Yangian algebra $Y(gl_N)$ are investigated and their explicit realizations are also discussed. Possible interesting physical applications of such extended Yangian algebras are indicated.Comment: 21 pages, LaTeX (twice). Interesting physical applications of the work are indicated. To appear in Int. J. Mod. Phys.

Reaching Community Through School Going Children for Sickle Cell Disease in Zankhvav Village of Surat District, Western India

Objectives: The objective of the study was to explore a method to reach the community via school going adolescents for screening tribal people for Sickle Cell disease. Methodology: A cross-sectional study was conducted in a total of 1023 school going adolescents for Sickle Cell Disease screening by Dithionite Tube Turbidity (DTT) test with subsequent Hemoglobin Electrophoresis for confirmation among those testing positive for DTT. They were then advised to get their family members tested for the same. Results: 24.41% of school going adolescents tested positive by DTT test. 152 family members of those positive school children came forward for testing. On performing the DTT test on the family members, 53.94% tested positive. Out of those who tested positive, 61% belonged to Vasava caste; 36.6% belonged to Chaudhari caste followed by Gamit and Dhodhia Patel. On the subsequent Hemoglobin electrophoresis, 52.63% of the family members were found to be positive for Sickle Cell Trait and 1.97% tested positive for Sickle Cell Disease. Conclusions: School going children can be an effective medium to approach the community for the screening of Sickle Cell Disease

Accretion disc-corona and jet emission from the radio-loud narrow-line Seyfert 1 galaxy RX J1633.3+4719

We perform X-ray/ultraviolet (UV) spectral and X-ray variability studies of the radio-loud narrow-line Seyfert 1 (NLS1) galaxy RX J1633.3+4719 using XMM-Newton and Suzaku observations from 2011 and 2012. The 0.3-10 keV spectra consist of an ultrasoft component described by an accretion disc blackbody (kT_in = 39.6^{+11.2}_{-5.5} eV) and a power law due to the thermal Comptonization ({\Gamma} = 1.96^{+0.24}_{-0.31}) of the disc emission. The disc temperature inferred from the soft excess is at least a factor of 2 lower than that found for the canonical soft excess emission from radio-quiet NLS1s. The UV spectrum is described by a power law with photon index 3.05^{+0.56}_{-0.33}. The observed UV emission is too strong to arise from the accretion disc or the host galaxy, but can be attributed to a jet. The X-ray emission from RX J1633.3+4719 is variable with fractional variability amplitude $F_{\rm var}$=13.5$\pm1.0$ per cent. In contrast to radio-quiet active galactic nuclei (AGN), X-ray emission from the source becomes harder with increasing flux. The fractional rms variability increases with energy and the rms spectrum is well described by a constant disc component and a variable power-law continuum with the normalization and photon index being anticorrelated. Such spectral variability cannot be caused by variations in the absorption and must be intrinsic to the hot corona. Our finding of possible evidence for emission from the inner accretion disc, jet and hot corona from RX J1633.3+4719 in the optical to X-ray bands makes this object an ideal target to probe the disc-jet connection in AGN.Comment: 12 pages, 11 figures, 3 tables, Published in MNRA

Detection of the high energy cut-off from the Seyfert 1.5 galaxy NGC 5273

We perform the NuSTAR and Swift/XRT joint energy spectral fitting of simultaneous observations from the broad-line Seyfert 1.5 galaxy NGC 5273. When fitted with the combination of an exponential cut-off power-law and a reflection model, a high energy cut-off is detected at 143$^{+96}_{-40}$ keV with 2-sigma significance. Existence of such cut-off is also consistent with the observed Comptonizing electron temperature when fitted with a Comptonization model independently. We observe a moderate hard X-ray variability of the source over the time-scale of ~12 years using INTEGRAL/ISGRI observations in the energy range of 20-100 keV. When the hard band count rate (6-20 keV) is plotted against the soft band count rate (3-6 keV), a hard offset is observed. Our results indicate that the cut-off energy may not correlate with the coronal X-ray luminosity in a simple manner. Similarities in parameters that describe coronal properties indicate that the coronal structure of NGC 5273 may be similar to that of the broad-line radio galaxy 3C 390.3 and another galaxy MCG-5-23-16 where the coronal plasma is dominated by electrons, rather than electron-positron pairs. Therefore, the coronal cooling is equally efficient to the heating mechanism keeping the cut-off energy at low even at the low accretion rate.Comment: 11 pages, 6 figures, 1 table, accepted for publication in MNRA

Effect of integrated nutrient management on growth, productivity, quality and nutrient uptake of irrigated yellow sarson (Brassica campestris L var. yellow sarson) in older alluvial soil of West Bengal

A field experiment was conducted during rabi (winter) seasons of 2007-08 and 2008-09 to study the effect of integrated nutrient management on growth, yield, oil content and nutrient uptake of yellow sarson (Brassica cam-pestris L var. yellow sarson) in older alluvial soil of West Bengal. Significantly higher leaf area index (1.75 at 40 days after sowing; DAS), dry matter accumulation (1366.9 g/m2 at 80 DAS) and highest number of siliquae/plant (118.3), number of seeds/siliqua (21.8), seed yield (1.90 t/ha), stover yield (3.86 t/ha) were recorded significantly (at 5% lev-el) higher with poultry manure (PM) @2.5t/ha +50%RDF (Recommended Dose of Fertilizer i.e. 80-40-40 of N-P2O5-K2O kg/ha) + PSB (phosphate solubilising bacteria) + AZ (Azotobacter) during both the years and on pooled basis. An average of 30.5% and 233% increase in seed yield by this treatment was recorded over sole application of RDF and control respectively. Integrated application of PM (2.5 t/ha) + 50% RDF + PSB + AZ recorded highest oil content (43.16%) and positive effect on soil fertility status. The highest benefit: cost ratios (2.26 and 2.4 in 2007-'08 and 2008-'09 respectively) were achieved from the use of 50% RDF + PM (2.5 t/ha) +PSB+AZ

Effect of nitrogen and foliar spray of potassium nitrate and calcium nitrate on growth and productivity of yellow sarson (Brassica campestris L. var yellow sarson) crop under irrigated condition

A field experiment was conducted during rabi season of 2007-’08 and 2008-’09 to study the effect of calcium nitrate {Ca (NO3)2} and potassium nitrate {KNO3} at 50 % flowering stage and soil applied nitrogen {N: (0, 40 and 80kg N/ha)} on growth, productivity and economics ofyellow sarson at farmers field under irrigated old alluvial soil of West Bengal. Highest leaf area index (LAI) values at 40 days of crop age (1.748 and 1.592), dry matter accumulation (1404.3 and 1288.8 gm-2) at 80 days and crop growth rate (C.G.R) (27.87 and 25.68 g m-2 day-1) in between 40 to 60 days were obtained at Nitrogen application at the rate of 80 kg / ha and mixed spray of 0.203 % Ca (NO3)2 + 0.25 % KNO3 respectively. Soil application of 80 kg N/ ha along with foliar spray of 0.203 % Ca (NO3)2 + 0.25 % KNO3 resulted increase in seed yield (1.68 t ha-1) by 12 % over 80 kg N/ ha with only water spray (1.5 t ha-1). Foliar spray of 0.203 % Ca (NO3)2 + 0.25 % KNO3 improved the yield components and seed yield over their sole application. Application of 80 kg N/ha along with 0.203 % Ca (NO3)2 + 0.25 % KNO3 at 50 % flowering stage was found to be the most effective in increasing yellow sarson production in old alluvial soil