Recovery of chromite values from tailings of COB plant using enhanced gravity concentrator

In world scenario, India is ranked third largest producer of chromite ore. Odisha Mining Corporation Ltd. is operating a chromite ore beneficiation (COB) plant with a capacity of 0.15 mtpa. The process route basically involves comminution, classification followed by gravity separation. The present plant practice generates tailings with some chromite values associated with it. In the present study, an attempt was made to recover chromite values from the tailings using enhanced gravity separator such as Falcon concentrator, a high g-force generating equipment. The tailing sample is very fine grained in nature and contains significant amount (~68 Wt.%) of particle below 11 μm. The chemical analysis of head sample shows a value of 20.23% Cr2O3. Mineralogical study revealed that chromite is the major chromite bearing mineral and clay, gibbsite and spinel are the major gangue minerals present in the material. The process parameters are optimised with respect to feed particle size, bowl rotation speed and the back water flow rate. It was observed that high rotation of the bowl and high back water flow rate favour generating a clean concentrate with Cr2O3 more than 40% with >68% recovery

Corporate Governance and profitability: Evidence from Indian IT companies

Corporate governance provides the guidelines to the companies how can be directed and controlled. The objective of this study is to examine the relationship between corporate governance mechanisms and profitability for the IT companies listed Indian stock Exchange

ACCURACY EVALUATION OF VARIOUS SATELLITE IMAGERY PRODUCTS FOR LARGE SCALE TOPOGRAPHIC MAPPING

DEM and ortho-imageries are building blocks for topographic mapping and satellite imageries are prime source of data for inaccessible terrain. When the required mapping scale is of the order 10k or higher, the accuracy needed is also of higher order. It becomes imperative to evaluate the accuracy of available high resolution DEMs and corresponding imageries to provide quality products for mapping. The present study is encouraged by the fact that not every place of our earth is accessible, so an assessment of satellite data products is required for precise mapping. Here, the accuracy assessment has been carried out in terms of RMSE, SD, CE90 and LE90 of various products viz. Carosat-1, Cartosat-2E, Worldview-2 (WV), Vricon, Pleiades, ALOS-World-3D (AW3D) ASTER, SRTM with Yahoo image. GCPs acquired by DGPS field survey were used to evaluate the products. The results have demonstrated that Vricon 0.5 m ortho-image provides the best RMSE (3.42) and CE90 (4.65); however, WV and Vricon DEM turns out to be best with RMSE of 2.20 m and 2.90 m respectively. Both products are suitable for large scale topographic mapping. The data can be used for inaccessible terrain where GCPs are not available. However, Cartosat-1 and Cartosat-2E can be used where good GCPs are available. The outcome of study can be used for planning of data suitability for scale variant mapping and inaccessible terrain mapping

Spherical indentation response of a Ni double gyroid nanolattice

The effect of indentation strain εi upon hardness H and elastic modulus E of a Ni Double Gyroid (DG) nanolattice was investigated using a spherically-tipped nanoindenter. H remains invariant, while E decreases linearly, with increasing εi. Results reveal the progressive collapse of the DG lattice beneath the indenter. The measured values of H and extrapolated value of E at εi = 0 were used to estimate the yield strength and elastic modulus of the Ni cell walls. The latter was compared with the ideal strength of Ni, nanocrystalline films and of sub-100 nm diameter single crystals

INFLUENCE OF FERTILIZER AND WEED MANAGEMENT ON YIELD AND NUTRIENT UPTAKE IN ONION (Allium cepa L.)

A field experiment was conducted to find out appropriate nutrient and weed management practices for yield maximization and nutrient uptake of onion during rabi 2018-19 at the experimental plot of Regional Research and Technology Transfer Station, Keonjhar of Odisha. The experiment was laid out in Split plot technique with fifteen treatments viz., Main plot belongs to Nutrient management (N) with treatments i.e. N1- Soil test based fertilizer recommendation (STBFR), N2 - 50% STBFR + FYM (Based on N requirement), N3-STBFR + Sulphur), while Subplots belongs to weed management (W) with treatments viz., W1- Pendimethalin (PE) @ 0.8 Lha-1, W2- Oxyflurofen (PE) @ 0.2 Lha-1, W3- Pendimethalin (PE) @ 0.8 Lha-1+ one hand weeding at 25 days after transplanting(DAT), W4-Oxyflurofen (PE) @ 0.2 Lha-1+ one hand weeding at 25 days after transplanting(DAT), W5- one hand weeding at 25 days after transplanting (DAT). The highest onion bulb yield of 16.72 t ha-1 was obtained under the treatment applied with Pendimethalin (PE) @ 0.8 Lha-1 along with one hand weeding at 25 DAT, followed by Oxyfluorfen 0.2Lha-1pre-emergence + 1 hand weeding at 25 DAT (15. 88 t ha-1). The treatment combination of N2W3 (96.83, 16.80, 57.73 kg ha-1) was recorded the highest N, P, and K uptake by crops respectively while N3W3 (51.39 kg ha-1) was recorded as the highest S uptake by a crop over the rest of the treatments

Digital technologies, legal design and the future of the legal profession

Legal Technology – or “Legal Tech” – is disrupting the traditional operations and self-understanding of the legal profession. This chapter introduces the central claim of this book, namely that these developments are having and will continue to have a disruptive effect on the work of lawyers and that adapting to this new operating environment is crucial for legal professionals remaining relevant in an increasingly technology-driven world. This introductory chapter outlines some of the main features of this on-going transformation process, introduces some of the pressures it is creating for lawyers, and provides short summaries of the chapters that comprise this collection.fi=vertaisarvioitu|en=peerReviewed

The impact of demonetization on Indian firms’ performance: does company’s age make a difference?

The main aim of this paper is to evaluate the impact of demonetization on Indian firm’s quarterly financial performance before and after demonetization period (March-December, 2017), and to find out if companies’ age helps to face financial disruption. Four variables, which are net sales, total income, net profit after tax, and earnings per share, were taken as proxies for analyzing the quarterly financial performance of 2,892 companies listed on Bombay Stock Exchange (BSE), National Stock Exchange (NSE), and Calcutta Stock Exchange (CSE). Nonparametric test, particularly Wilcoxon Matched-Pairs Signed Rank Test and Kruskal-Wallis one-way analysis of variance, were applied in analyzing the data. Results reveal that there is a statistically significant difference between the financial performance before and after demonetization at 5% level of significance. It was also found that the decrease/increase in the financial performance of all the firms was affected by the demonetization process, irrespective of their ages. The findings could be useful for financial managers and financial consultants, as they would be able to focus on the issues that matter most at the time of financial disruption

Jackfruit waste and peels: Potential as livestock feed

Feed and fodder problems could be well-addressed regionally using the vegetable wastes. The vegetable wastes are highly perishable and are very prone to spoilage due to high moisture content. These wastes are dumped in open areas contributing to unhealthy/unhygienic surroundings. One of the unexplored vegetable by-products is Jackfruit waste on which least research has been conducted for its possibility to be included in livestock feed. Jackfruit consumption and processing leads to the generation of enormous amounts of non-edible wastes of peel, central axis, and edible by-products like seed and perianth. Jackfruit peel is a rich source of bioactive antioxidants like vitamin C and beta-carotene, which protect the body against free radicals and strengthen the immune system. It is also rich in various phytonutrients such as alkaloids, lignans, isoflavones, and saponins. Thermal drying, grinding and fermentation with fungi and bacteria have been found effective for the inclusion of Jackfruit waste/ peel in livestock meal

Application of CRISPR/Cas9-mediated gene editing for abiotic stress management in crop plants

Abiotic stresses, including drought, salinity, cold, heat, and heavy metals, extensively reducing global agricultural production. Traditional breeding approaches and transgenic technology have been widely used to mitigate the risks of these environmental stresses. The discovery of engineered nucleases as genetic scissors to carry out precise manipulation in crop stress-responsive genes and associated molecular network has paved the way for sustainable management of abiotic stress conditions. In this context, the clustered regularly interspaced short palindromic repeat-Cas (CRISPR/Cas)-based gene-editing tool has revolutionized due to its simplicity, accessibility, adaptability, flexibility, and wide applicability. This system has great potential to build up crop varieties with enhanced tolerance against abiotic stresses. In this review, we summarize the latest findings on understanding the mechanism of abiotic stress response in plants and the application of CRISPR/Cas-mediated gene-editing system towards enhanced tolerance to a multitude of stresses including drought, salinity, cold, heat, and heavy metals. We provide mechanistic insights on the CRISPR/Cas9-based genome editing technology. We also discuss applications of evolving genome editing techniques such as prime editing and base editing, mutant library production, transgene free and multiplexing to rapidly deliver modern crop cultivars adapted to abiotic stress conditions