Cochin University of Science and Technology

About: Cochin University of Science and Technology is a education organization based out in Kochi, Kerala, India. It is known for research contribution in the topics: Thin film & Natural rubber. The organization has 5382 authors who have published 7690 publications receiving 103827 citations. The organization is also known as: CUSAT & Cochin University.

Search for active-sterile neutrino mixing using neutral-current interactions in NOvA

Abstract: We report results from the first search for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral-current interactions over a baseline of 810 km between the NOvA detectors. Analyzing a 14-kton detector equivalent exposure of 6.05×10^(20) protons-on-target in the NuMI beam at Fermilab, we observe 95 neutral-current candidates at the Far Detector compared with 83.5 ± 9.7(stat) ± 9.4(syst) events predicted assuming mixing only occurs between active neutrino species. No evidence for ν_μ→ν_s transitions is found. Interpreting these results within a 3+1 model, we place constraints on the mixing angles θ_(24) < 20.8° and θ_(34_ < 31.2° at the 90% C.L. for 0.05 eV^2 ≤ Δm^2_(41) ≤ 0.5 eV2, the range of mass splittings that produce no significant oscillations over the Near Detector baseline.

Minimum variance stratification

Abstract: The equations for the solution of minimum variance stratification under Neyman allocation are not easily tractable and hence approximate solutions have been suggested by various workers. These approximate solutions are in general not satisfactory as they do not achieve global minimum variance. An iterative procedure which results in global minimum variance solution to the stratification problem under Neyman allocation, is suggested herein with illustrations using six theoretical population models.

Hemoglobin and hematocrit values in the fish Oreochromis mossambicus (Peters) after short term exposure to copper and mercury.

Abstract: Hematology is used as an index of health status in a number of fish species. Hematological changes have been detected following different types of stress conditions like exposure to pollutants, diseases, hypoxia, etc. Copper and mercury are two known aquatic pollutants. Though copper is an essential micro-nutrient, it is highly toxic at high concentrations. Mercury has no biological function to serve and causes serious impairment in the metabolic and physiological functions of the body. In this paper hematocrit and hemoglobin (Hb) values in the fish Oreochromis mossambicus separately exposed to two different sublethal concentrations of copper and mercury for a period of 168 h are reported.