Arup Samanta

Indian Institute of Technology Roorkee

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Daniel Moraru

Shizuoka University

Michiharu Tabe

Shizuoka University

Takeshi Mizuno

Saitama University

Hiroshi Mizuta

University of Southampton

Sangram Ganguly

Ames Research Center

Ranga B. Myneni

Boston University

Ryszard Jabłoński

Warsaw University of Technology

Krzysztof Tyszka

University of Warsaw

Le The Anh

The University of Tokyo

Debajyoti Das

Indian Association for the Cultivation of Science

Cooperative Institutions

Central Agricultural University

Indian Veterinary Research Institute

West Bengal University of Animal and Fishery Sciences

Shizuoka University

Indian Institute of Technology Roorkee

Texas A&M University

National Dairy Research Institute

Assam Agricultural University

University of Veterinary Medicine

Mitchell Institute

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Mapping air contaminants indoors using a prototype computed tomography system

The Annals of Occupational Hygiene (1996)

Arup Samanta

Single and multiple plumes of sulphur hexafluoride were measured and mapped using a prototype open-path Fourier transform infrared spectrometer (OP-FTIR)-computed tomography (CT) system in an indoor exposure chamber. The OP-FTIR-CT system accurately mapped the position of concentration peaks at different locations in the chamber and estimated concentrations within a range of 4–50% when compared with point samples measured by gas chromatography with an electron capture detector. Two OP-FTIR spectrometer ray configurations, one with 100 rays and the other with 136 rays, were used to scan the chamber and reconstruct the concentration maps. Ray configuration and time to scan the entire chamber were found to have a profound effect on the quality of the reconstructed maps. The ability to obtain real-time, non-invasive measurements, and to generate spatially and temporally resolved maps of multiple chemicals, makes the OP-FTIR-CT system a promising technique for monitoring source emissions and evaluating exposures to air contaminants in a workplace.

10.1016/s0003-4878(96)00013-0

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Effect of Dietary Supplementation of Aloe Vera and Lactobacillus Acidophilus on Growth Performance, Nutrient Utilization and Carcass Characteristics of Broiler Birds

International Journal of Livestock Research (2019)

Sagarika Barman Arup Samanta Biren Kumar Das Ranjana Goswami Jagan Mohanarao Gali

Aloe Vera

10.5455/ijlr.20180810034853

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Tunneling in Systems of Coupled Dopant-Atoms in Silicon Nano-devices

Nanoscale Research Letters (2015)

Daniel Moraru Arup Samanta Krzysztof Tyszka Le The Anh Manoharan Muruganathan

Following the rapid development of the electronics industry and technology, it is expected that future electronic devices will operate based on functional units at the level of electrically active molecules or even atoms. One pathway to observe and characterize such fundamental operation is to focus on identifying isolated or coupled dopants in nanoscale silicon transistors, the building blocks of present electronics. Here, we review some of the recent progress in the research along this direction, with a focus on devices fabricated with simple and CMOS-compatible-processing technology. We present results from a scanning probe method (Kelvin probe force microscopy) which show direct observation of dopant-induced potential modulations. We also discuss tunneling transport behavior based on the analysis of low-temperature I-V characteristics for devices representative for different regimes of doping concentration, i.e., different inter-dopant coupling strengths. This overview outlines the present status of the field, opening also directions toward practical implementation of dopant-atom devices.

Nanoelectronics

Nanochemistry

Molecular Electronics

10.1186/s11671-015-1076-z

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Vegetation response to extreme climate events on the Mongolian plateau from 2000-2010

AGUFM (2012)

Ranjeet John J. Chen Zhiyun Ouyang O. Batkishig Arup Samanta

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Inelastic Cotunneling in the Coulomb-Blockade Transport in Donor-Atom Transistors

Pooja Yadav Soumya Chakraborty Daniel Moraru Arup Samanta

We report the finite bias electrical transport through phosphorus (P) donor atoms in silicon nanoscale device, where the inelastic cotunneling in the Coulomb blockade regime is investigated experimentally and theoretically. We observed the inelastic cotunneling features emerging from the excited states of P-donors, at the crossover between blockade and non-blockade region, giving rise to a sharp conductance jump near the threshold voltage.

Coulomb blockade

10.1109/snw56633.2022.9889041

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Transport Spectroscopy of Dopant States in Randomly-Doped Single-Electron Transistors

The Japan Society of Applied Physics (2013)

Arup Samanta

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Determination of exchange integrals and effect of cationic site occupancy (8b/24d) on the structural and magnetic properties of nanocrystalline Mn-doped Gd2O3

Journal of Alloys and Compounds (2022)

A. Karmakar Hemant Arora M. Nath Soumyaditya Sutradhar B. J. Sarkar

Nanocrystalline material

Occupancy

Cationic polymerization

10.1016/j.jallcom.2022.167475

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(Invited) Dopant-Atom-Based Tunnel SOI-MOSFETs

ECS Transactions (2013)

Michiharu Tabe Daniel Moraru Earfan Hamid Arup Samanta Le The Anh

Recently, the role of dopants in Si devices has been changing after a long and successful history in Si integrated circuit technology. The change can be seen as a transition from “bulk-type” dopants, with averaged potential, to “atom-type” dopants, with individual atomistic potential. Furthermore, dopant energy levels are modified by the effect of dielectric misfit with surrounding Si and the outside structure, which leads to the transformation of conventional dopants into artificial deep dopants. This effect may be significantly important for the purpose of the extension of operation temperature range of dopant-atom devices from low temperatures (<50 K) to room temperature.

10.1149/05809.0089ecst

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Nitrogen solubility and protein fractions of grasses

Indian Journal of Animal Nutrition (2004)

R. K. Sharma Arup Samanta M. Ramachandran G.P. Mandal

Twelve grasses such as Brachiaria species, Cymbopogan citratus (lemon grass), Dicanthium annulatum (marvel grass), Panicum maximum (guinea grass), Pennisetum purpureum (Napier), Pennisetum polystachyon (Napier thin), Napier-3, Napier-7 Stylosanthus scabra, Stylosanlhus hamata, Setaria spahealata (nandi grass) and Vetiver zizanoides (vetiver grass) supplied by the Agriculture Department were analyzed for proximate and fibre constituents, nitrogen solubility, fibre bound nitrogen and nitrogen fractions. The CP content was highest (14.2%) in S. scabra and lowest in C. citratus (6.7%). The NDF content was highest in V. zizanoides (82.1%) and lowest in S. scabra (52.7%), while ADF content was highest in V. zizanoides (48.7%) and lowest in S. hamata (29.5%). The Ca and P contents were below 1 percent in all the samples. The ND1N was highest in D. annulatum and lowest in S. scabra while the AD IN was highest in V. zizanoides and lowest in S. hamata. The N solubility in borate phosphate buffer ranged from 20.3% (Brachiaria species) to 76.3% (S. hamata). It was concluded that P. polystachyon, P. purpureum, Napier-3, Napier-7, S. spahealata and S. scabra can serve as good fodder are good grasses for ruminants.

Pennisetum purpureum

Panicum

Brachiaria

Fodder

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Retrieving canopy structure from synergy of multi-angle spectral and Lidar data

AGU Fall Meeting Abstracts (2007)

M. A. Schull Sangram Ganguly Arup Samanta Dong Huang Julian Jenkins

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