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Sumit Das,Amitesh Gupta,Sasanka Ghosh 대한공간정보학회 2017 Spatial Information Research Vol.25 No.6
In this paper, an attempt has been made to delineate groundwater potential zones in Hingoli district, Maharashtra, India. Remote sensing and traditional data were collected from different sources and analysed in GIS software to prepare thematic maps of different geo-environmental factors such as lithology, drainage, lineaments, slope etc. as these factors having an impact on groundwater availability of an area, directly or indirectly. All these factors have been integrated into GIS software and multi influence factor method was applied to delineate groundwater potential zones. The result has shown about 50% area is having the good potentiality of groundwater, whereas about 6% region falls under very low potential area. The Central part of the study area is having very low groundwater potential, mainly due to the steep slope and rocky outcrop. The southern part of the Hingoli district has shown good groundwater potential, because of the gentle slope which influences water to infiltrate. All the major towns and villages are located in good groundwater prospect areas. Therefore, these locations do not experience extreme drought conditions. The present work is valuable for future planning and management of groundwater resource in Hingoli district.
Sumit Das,Sudhakar D. Pardeshi 대한공간정보학회 2018 Spatial Information Research Vol.26 No.1
In this study, lineaments have been extracted from Cartosat, Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Shuttle Radar Topographic Mission (SRTM) Digital Elevation Models (DEM) of different spatial resolution. The extracted lineaments were analysed to understand which DEM is most suitable for extraction of lineaments accurately. The results have shown that maximum number of lineaments can be extracted by using Cartosat DEM while ASTER DEM provides lowest number of lineaments. As a result of this study, it is suggested to make use of Cartosat DEM for the extraction of lineaments in Indian territory (data is only available for India), because it provides the most detailed geological information among all the datasets. Cartosat DEM is also suitable for studying very small areas as detailed surface information can be extracted by using this data. SRTM DEM can be used for countries other than India, and it has the capability to deliver moderate structural information. Likewise, SRTM data is more suitable for a large study area. ASTER DEM is not recommended for the study of structural and geological surface features because most of the features cannot be extracted and the result could not be applied in the detailed geological study.
Das Gouri Sankar,Sarkar Sabyasachi,Aggarwal Ruchi,Sonkar Sumit Kumar,박준우,Tripathi Kumud Malika,김태영 한국탄소학회 2019 Carbon Letters Vol.29 No.6
A new discrete bis-dithiolene complex, [PPh4]2[Zn(DMED)2] (1; DMED = 1,2-dicarbomethoxy-1,2-dithiolate) with sulfur-based radical character was synthesized and structurally characterized. Complex 1 is stable and exhibits a square planar geometry around the zinc metal. 1 forms nanospheres through a one-pot water-induced self-assembly in a mixture of solvents (acetonitrile–water). These nanospheres were further decorated with water-soluble carbon nanotubes (wsCNTs) through hydrogen bonding between the peripheral –COOCH3 groups of 1 and surfacial carboxyl groups of wsCNTs to assemble into a spherical nanocomposite. The as-prepared nanocomposite showed fluorescence emissions in visible region due to the separation of energy states of the nanospheres assisted by wsCNTs, suggesting the future possibilities of these new materials for use in biomedical application.
Gas holdup in tapered bubble column using pseudoplastic non-Newtonian liquids
Sumit Kumar Jana,Sudip Kumar Das,Asit Baran Biswas 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.4
Experimental studies on the gas holdup in two tapered bubble columns using non-Newtonian pseudoplasticliquid have been reported. The effects of different variables such as gas flow rate, liquid viscosity, bed height,and orifice diameter of sieve plate on gas holdup have been investigated. An empirical correlation has been developedfor the prediction of the gas holdup as a function of various measurable parameters of the system. The correlation isstatistically acceptable.
Gouri Sankar Das,Sabyasachi Sarkar,Ruchi Aggarwal,Sumit Kumar Sonkar,Jun‑Woo Park,Kumud Malika Tripathi,TaeYoung Kim 한국탄소학회 2019 Carbon Letters Vol.29 No.6
A new discrete bis-dithiolene complex, [ PPh4]2[Zn(DMED)2] (1; DMED = 1,2-dicarbomethoxy-1,2-dithiolate) with sulfurbased radical character was synthesized and structurally characterized. Complex 1 is stable and exhibits a square planar geometry around the zinc metal. 1 forms nanospheres through a one-pot water-induced self-assembly in a mixture of solvents (acetonitrile–water). These nanospheres were further decorated with water-soluble carbon nanotubes (wsCNTs) through hydrogen bonding between the peripheral –COOCH3 groups of 1 and surfacial carboxyl groups of wsCNTs to assemble into a spherical nanocomposite. The as-prepared nanocomposite showed fluorescence emissions in visible region due to the separation of energy states of the nanospheres assisted by wsCNTs, suggesting the future possibilities of these new materials for use in biomedical application.
A Numerical Study on the Effect of Aggregate Gradation on Mechanical Response of Asphalt Mix
Ashok Singh,Animesh Das,Sumit Basu 대한토목학회 2012 KSCE Journal of Civil Engineering Vol.16 No.4
Various aggregate gradations are recommended in various guidelines/specifications for different types of asphalt mixes. These aggregate gradations have primarily evolved through experimental studies and experience on their field performances. Given a size range of aggregates, numerous aggregate gradations (and thereby numerous asphalt mixes) are possible. It is essentially a cumbersome and time consuming task to study the laboratory or field performances for all such possible asphalt mixes. The objective of the present work is to perform a micromechanical analyses on various asphalt mixes generated from computer simulated aggregate gradations. A hierarchical modeling scheme is used in the present work, where the asphalt mix is modeled as elastic-visco-plastic matrix with aggregates as rigid particulate intrusions with large volume fraction. In this process, a large number mixes can be simulated for their mechanical responses and some of them can be chosen for further laboratory verification. It is expected that such a process would save a considerable time and effort while finalizing a suitable gradation for the mix design.
Kim, Shin Ae,Das, Sumit,Lee, Howon,Kim, Junghoon,Song, Yun Mi,Kim, In Sook,Byun, Kyung Min,Hwang, Soon Jung,Kim, Sung June Wiley Subscription Services, Inc., A Wiley Company 2011 Biotechnology and bioengineering Vol.108 No.6
<P><B>Abstract</B></P><P>Matrix mineralization is a terminal process in osteoblast differentiation, and several approaches have been introduced to characterize the process in tissues or cultured cells. However, an analytical technique that quantitates in vitro matrix mineralization of live cells without any labeling or complex treatments is still lacking. In this study, we investigate a simple and enhanced optical method based on surface plasmon resonance (SPR) detection that can monitor the surface‐limited refractive index change in real‐time. During monitoring MC3T3‐E1 cells in vitro culture every 2 days for over 4 weeks, the SPR angle is shifted with a greater resonance change in cells cultured with osteogenic reagents than those without the reagents. In addition, the SPR results obtained have a close relevance with the tendency of conventional mineralization staining and an inductively coupled plasma‐based calcium content measure. These results suggest a new approach of a real‐time SPR monitoring in vitro matrix mineralization of cultured cells. Biotechnol. Bioeng. 2011; 108:1473–1478. © 2010 Wiley Periodicals, Inc.</P>