A study on Hydroelectric and Irrigation potential of Dikhow river, Assam

Hydropower as a form of renewable resource is very essential in the sustainable development of a country. On the basis of various studies made on Dikhow a perennial river of length of 255.8 km using GIS and Remote sensing an attempt has been made to locate suitable sites for dams for generating power or supplying water for irrigation and other purposes. The river Dikhow originates at Assam-Nagaland border at 26.08°N latitudes and 94.56°E longitudes and flows though the plains of Assam and finally to the mighty Brahmaputra at 26.99°N latitudes and 94.45°E longitudes covering an area of 4128.42 km2. An attempt has been made to create a thematic assessment map to locate suitable sites for dam using remote sensing and geographic information system (GIS). The characteristics of these thematic maps have been derived with the help of different softwares (Arc GIS 10.1, and Global Mapper 11). A database of the catchment area is constructed to decide the locations of the proposed dams. From the three locations(site 1,2 and 3) chosen, site 1 has been considered suitable for irrigation purposes whereas out of the sites 2 and 3 are chosen for Hydropower generation, site 2 has been considered more suitable for the purpose, because of its more reservoir storage, lesser width of the channel and presence of suitable foundation material required for dam construction

Transfusion-associated graft-vs-host disease – A case report

Transfusion-associated graft-vs-host disease (TAGVHD) is a rare complication of blood transfusion. Unlike GVHD associated with hematopoietic stem cell transplantation TA-GVHD involves the patient's bone marrow and leads to bone marrow aplasia. We report a case of TA-GVHD in a 45-year-old post-hysterectomy patient after packed red blood cell transfusion from a sibling donor. The patient had fever, maculopapular rashes all over the body, elevated transaminases, and hyperglycemia after a week of the blood transfusion. Severe pancytopenia and bone marrow aplasia followed and she succumbed to her disease after 3 weeks of onset

Growth of SiO2 microparticles by using modified Stober method: Effect of ammonia solution concentration and TEOS concentration

The unique structural features and suitability of the SiO2 microparticles in different application areas have mobilized a worldwide interest in the last few decades. In this report a classical method known as the Stober method has been used to synthesize silica microspheres. These microparticles have been synthesized by the reaction of tetraethyl orthosilicate (Si(OC2H5)(4), TEOS)(silica precursor)with water in an alcoholic medium (e.g. ethanol) in the presence of KCl electrolyte and ammonia as a catalyst. It has been observed that the size of the microparticles closely depends on the amount of the TEOS and ammonia. A decrease in the size of micro particles from 2.1 mu m to 1.7 mu m has been confirmed as the amount of TEOS increases from 3.5ml to 6.4ml respectively. In similar way a decrease in the diameter of the micro particles from 2.1 mu m to 1.7 mu m has been observed with increase in the ammonia content from 3ml to 9ml

Discriminating neutrino mass models using Type II seesaw formula

In this paper we propose a kind of natural selection which can discriminate the three possible neutrino mass models, namely the degenerate, inverted hierarchical and normal hierarchical models, using the framework of Type II seesaw formula. We arrive at a conclusion that the inverted hierarchical model appears to be most favourable whereas the normal hierarchical model follows next to it. The degenerate model is found to be most unfavourable. We use the hypothesis that those neutrino mass models in which Type I seesaw term dominates over the Type II left-handed Higgs triplet term are favoured to survive in nature.Comment: No change in the results, a few references added, some changes in Type[IIB] calculation

Institution of Ground Water Market for Management of Ground Water Resource: A Study from Assam in Northeast India

Assam in the north eastern region of India has the endowments to ensure agricultural growth in the sense that the state has huge reserves of ground water in addition to the enormous surface water availability. Returns to both labor and capital in the state are considered high as potentials for exploiting the existing technology are yet largely untapped. As insufficient irrigation infrastructure is identified as a major constraint on exploiting such potentials, investment for expanding irrigation capacity is needed. At the same time, putting necessary institutions in place to ensure that the installed capacity is effectively utilized is also equally important. Compared to relatively larger government irrigation schemes, the privately owned and operated tube well based small scale projects in the state have relatively better utilization efficiency. However, utilisation of irrigation potential of these schemes is also affected by fragmented and small size of holdings in the state. Emergence of the institution of ground water markets, however, is expected to improve utilisation efficiency of irrigation as it can make optimal use of the scarce natural resource of ground water. To investigate into some of the questions related with enhancing utilization efficiency and better management of the common pool resource of ground water, a study of ground water markets in Assam was taken up. Using inputs from field investigations, the study examined the nature of ground water markets in the state, the issue of reliability of water supply and the conditions for viability of this market for ensuring better management of ground water resource in Assam. The study points out that apart from improving utilization efficiency of irrigation, reliability of water use has also increased considerably with emergence of ground water markets in the state

Dermatofibroma: Atypical presentations

Dermatofibroma is a common benign fibrohistiocytic tumor and its diagnosis is easy when it presents classical clinicopathological features. However, a dermatofibroma may show a wide variety of clinicopathological variants and, therefore, the diagnosis may be difficult. The typical dermatofibroma generally occurs as a single or multiple firm reddish-brown nodules. We report here two atypical presentations of dermatofibroma - Atrophic dermatofibroma and keloidal presentation of dermatofibroma. Clinical dermal atrophy is a common phenomenon in dermatofibromas as demonstrated by the dimpling on lateral pressure. However, this feature is exaggerated in the atrophic variant of dermatofibroma. Atrophic dermatofibroma is defined by dermal atrophy of more than 50% of the lesion apart from the usual features of common dermatofibroma. The keloidal variant of dermatofibroma should not be overlooked as a simple keloid. The findings of keloidal change in dermatofibromas may support that trauma is a possible cause of dermatofibroma