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.

Development and Testing of an ANN Model for Estimation of Runoff from a Snow Covered Catchment

Abstract: In this study, an attempt has been made to develop an ANN model to estimate runoff from a snow covered catchment of eastern Himalaya using feed-forward back-propagation algorithm with Levenberg–Marquardt optimization technique. The ANN model was programmed in C++ whereas a user-friendly GUI was developed in VB. The effects of past days rainfall and present day temperature data was observed on the performance of the selected ANN architecture in modelling snowmelt and monsoon season runoff. For this purpose, 8 years’ (2003–2010) daily data (rainfall, temperature, and discharge) were collected from CWC which were again divided into two parts (2003–2008 and 2009–2010) for training and testing of the ANN model, respectively. Initially it was found that the network can produce acceptable results with only rainfall data as input, but it needs at least past 3 days rainfall data to account for the antecedent moisture condition of the catchment. Networks 4-16-16-1 (with past 3 days rainfall) and 6-18-18-18-1 (with past 5 days rainfall) resulted modelling efficiency of 79.38 and 82.06% in training and 55.13 and 61.06% in validation, respectively. However, addition of present day temperature data as another input improved the performance in both training (ME 83.10 and 82.22%) and testing (ME 62.64 and 61.89%) marginally.

Simultaneous Determination of Cobalt and Nickel in Standard Alloys, Environmental and Biological Samples by Differential Pulse Polarography After Preconcentration of Their Morpholine-4-carbodithioates on Microcrystalline Naphthalene or Morpholine-4-dithiocarbamate-CTMAB-naphthalene Adsorbent

Abstract: A highly sensitive, selective, simple and economical differential pulse polarographic (DPP) method has been developed for the simultaneous determination of trace amounts of cobalt and nickel in standard alloys, biological and environmental samples. The morpholine-4-carbodithioates of cobalt and nickel are quantitatively adsorbed on microcrystalline naphthalene in the pH range 3.5–9.0 and 4.1–9.5 respectively and determined simultaneously with DPP after desorption with 10 ml of 1 M HCl. These metals can alternatively be adsorbed on morpholine-4-dithiocarbamate-cetyltrimethylammonium bromide-naphthalene (MCDT-CTMAB-naphthalene) adsorbent packed in a column and determined similarly. The detection limits are 0.15 ppm for cobalt and 0.20 ppm for nickel at minimum instrumental settings (signal-to-noise ratio=2). The linearity is maintained in the concentration ranges, cobalt 0.6–12.0/0.6–7.0 and nickel 1.0–20.0/1.0–12.0 ppm with a correlation factor of 0.9996 and relative standard deviations of 1.2 and...

Automated Computer-Aided Lung Cancer Detection System

Abstract: Cancer is one of the most deadly diseases in the world. Cancer of the lung or lung cancer is one of the most commonly occurring variants of cancer. This is due to an increase in pollution, presence of harmful gases in the environment and work area, smoking etc. Lung cancer can be diagnosed in a better way only if pulmonary lung nodules are detected at an early stage of growth. Popularly used techniques used for assisting the computer-aided systems in various stages of image processing include image acquisition, pre-processing, candidate nodule detection, segmentation and post-processing. Several pre-processing techniques are employed like image enhancement, smoothing, edge detection and region of interest selection. The main goal of this paper is to establish such an efficient automated computer-aided detection system which is able to detect malicious nodules in the same manner as it is detected manually by a doctor. Soft computing will be employed for the decision-making process.

Busbar protection – a review

Abstract: Busbars, being one of the most critical components of a switchyard where all the power system equipments are connected, needs an important attention from protection and from reliability point of view. Any maloperation may lead to threat for system stability but instant clearance is needed during a fault to avoid cascaded tripping. Many protection schemes have been devised starting from over-current protection to differential schemes using numerical to microprocessor based analysis in recent times. The paper reviews different aspects of busbar protection schemes and the recent trends of protection and their advantages including steps taken to overcome the problems of CT saturation and ratio mismatch of CT secondary.