North Eastern Regional Institute of Science and Technology

About: North Eastern Regional Institute of Science and Technology is a education organization based out in Itanagar, India. It is known for research contribution in the topics: Population & Raman spectroscopy. The organization has 813 authors who have published 1429 publications receiving 16122 citations.

Effect of Water Hyacinth ( Eichhornia crassipes ) Mulch on Soil Microbial Properties in Lowland Rainfed Rice-Based Agricultural System in Northeast India

Abstract: Most water bodies in the humid tropical areas of Arunachal Pradesh are infested with gregarious Eichhornia crassipes (Mart.) Solms. Over a period of time, with death and decay, the water bodies are eutrophicated. This natural phenomenon gave forth the idea of using E. crassipes biomass as a compost in agricultural fields for soil nutrients management, using microbial characteristics as potential indicators. The study indicating that water hyacinth as a potential organic substrate can stimulate the growth of diversity of microbial population in agricultural soils. In general, soil respiration and microbial population were significantly (p < 0.05) greater in mulched plots compared to control. Among treatments, vermicompost mulched plots recorded for higher bacterial (74.31 CFU × 104) and fungal counts (31.09 CFU × 103) at both surface and sub-surface soil layers. The present study provides baseline information for ecofriendly approach to management of E. crassipes, especially for the countries where it poses a huge threat to the wetland ecosystems. Nonetheless, nutrient deficient soils in the present study site due mainly to conventional farming practices and nutrient runoff could however be checked by mulching soils with naturally and abundantly growing E. crassipes locally.

Negative Birefringence in the Higher Homologs of the 5O.m Series of Liquid Crystals.

Abstract: A detailed study of the different parameters of the higher homologs of the 5O.m (m = 14, 16) series of liquid-crystalline compounds is reported. These are interdigitated compounds with unsymmetrical alkyl chain length. The compounds have a unique nature, unlike the other members of the nO.m series. The molecular structure reported in this article is not purely uniaxial; it has a bending tendency. In this article, we report that both the compounds exhibit negative birefringence. For the optical study, the refractive indices, ne and no, of the sample are measured by the thin-prism technique, using a He–Ne laser beam of wavelength 633 nm. A four-parameter model was used for fitting the experimental results. From the experimentally measured refractive indices, it is possible to compare different parameters with those of the theoretical models.

Capacity analysis of MRC receiver with adaptive transmitters over TWDP fading channels

Abstract: For arbitrary branch Maximal Ratio Combining (MRC) diversity system over Two Wave Diffused Power (TWDP) fading channel, the channel capacity equations for adaptive transmission techniques are obtained. The capacity expressions are derived using the probability density function (PDF) expression of the output signal to noise ratio of MRC receiver. The effects of fading parameters K and Δ and diversity order, M, on the system capacity are evaluated for different adaptive transmission techniques. A comparison of the capacities for the various adaptive transmission schemes employed with MRC receiver over TWDP fading channel is also presented.