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561 results on '"Mitra, Subhasish"'

551. Patent Issued for System-Level Validation Of Systems-On-A-Chip (SoC) (USPTO 10,546,079)

Subjects
Integrated circuits -- Reports -- Intellectual property, Education, Editors, Standard IC, Education, News, opinion and commentary
Abstract

2020 FEB 12 (VerticalNews) -- By a News Reporter-Staff News Editor at Education Letter -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Mitra, Subhasish (Palo [...]

Published
2020

552. Development of a flotation recovery model with CFD predicted collision efficiency.

Author

Wang, Ai, Hoque, Mohammad Mainul, Moreno-Atanasio, Roberto, Evans, Geoffrey, and Mitra, Subhasish

Subjects
*DISSOLVED air flotation (Water purification), *COMPUTATIONAL fluid dynamics, *LARGE eddy simulation models, *FLOTATION, *MICROBUBBLES, *TURBULENCE
Abstract

• A recovery model including the effect of turbulence and bubble loading developed. • Effect of turbulence on bubble-particle collision efficiency quantified using CFD. • Optimum collision efficiency obtained at 4% turbulence intensity. • Bubble loading reached a maximum limit faster with increasing solids concentration. • Model comparison with experimental recovery data showed reasonable agreement. In this study, a novel flotation recovery model based on a first-order kinetics is proposed. The collision efficiency in the recovery model was directly obtained from 3D computational fluid dynamics (CFD) simulations involving a single-bubble-multi-particle aggregate system with typical flotation operating conditions (bubble diameter of 1 mm and particles diameter of 30 μm). The effect of the fluctuating flow field on collision was accounted using a large eddy simulation (LES) turbulence model for two turbulence intensity cases namely 4% and 20%, respectively. It was noted that the collision efficiency decreased in the radial direction away from the symmetry axis of the bubble. The normalized equivalent critical radius K 1 for the overall collision efficiency, was found to be optimum at the lower turbulence intensity of 4%. A maximum bubble surface loading, 0.142 was determined by fitting the model-predicted bubble velocity with available experimental data. With this maximum bubble surface loading constraint, the recovery model predicted two regimes namely a loading regime in the early flotation period and a saturated regime wherein the bubble loading capability was entirely exhausted. Simulation of a batch flotation system suggested that loss in bubble surface loading capacity occurred faster in a dense pulp compared to a dilute pulp system and the predicted recovery decreased with increasing solids concentration for the same gas volume fraction. Similar to the collision efficiency, the optimum recovery was obtained at Ti = 4%. Further, the model predicted recovery was compared to a lab scale coal flotation test and reasonable agreement was obtained. [ABSTRACT FROM AUTHOR]

Published
2020
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556. Stanford researchers develop first computer using only carbon nanotube transistors.

Author

Ribeiro, John

Subjects
COMPUTER research, CARBON nanotube field effect transistors, COMPUTER industry
Abstract

The article focuses on the first computer using only carbon nanotube transistors developed by researchers at California's Stanford University. The study, published in the journal "Nature," was led by researchers Subhasish Mitra and H.S. Philip Wong. It states that the computer could do four tasks summarized as instruction fetch, data fetch, arithmetic operation and write-back, and run two different programs concurrently.

Published
2013

557. Indian American Engineers Among 2013 IEEE Fellows.

Subjects
SCHOLARSHIPS
Abstract

The article presents information on the Indian Americans who has been nominated to serve as "2013 Newly Elevated IEEE Fellows" by the Institute of Electrical and Electronics Engineers (IEEE). The nominees include Kannan Krishnan, professor at the University of Washington, Seattle, Washington, Subhasish Mitra, associate professor at the Stanford University, Palo Alto, California, and Sanjoy K. Baruah, professor at the University of North Carolina, Chapel Hill, North Carolina.

Published
2012

559. New Technologies Enable More Moore.

Author

Harris, Daniel

Subjects
*TECHNOLOGICAL innovations, *CARBON nanotubes, *INTEGRATED circuit interconnections, *INTEGRATED circuits, *SEMICONDUCTOR wafers, *MICROELECTRONICS, *ELECTRICAL engineering, *ENGINEERS, *SEMICONDUCTOR industry
Abstract

The article presents the author's view concerning the claim of several electrical engineering experts including James Jiam-Qiang Lu and Subhasish Mitra on the significance of carbon nanotubes (CNTs) in solving the interconnection problem of integrated circuits (IC) in semiconductor development. According to Lu, the combination of 3D wafer technology and CNT will help semiconductor equipment maintain its growth. Meanwhile, Mitra believes that actual transistor can be created using CNTs. Here, the author claims that the major remaining barrier in interconnection is the way to guarantee a desired CNT connection.

Published
2007

560. Circuit works with misaligned nanotubes.

Subjects
ALGORITHMS, CARBON nanotubes, FIELD-effect transistors
Abstract

The article focuses on the algorithm reported by Subhasish Mitra at Stanford University in California. The algorithm determines whether a carbon nanotube field-effect transistor provides correct logic functions, even in the presence of a large number of misaligned carbon nanotubes (CNT). By using this mathematical approach, misaligned-CNT-immune circuits automatically generate designs that are guaranteed to be immune to incorrect logic function.

Published
2007

561. Droplet impact dynamics on a spherical particle

Author

Mitra, S., Sathe, M., Doroodchi, E., Utikar, Ranjeet, Shah, Milinkumar, Pareek, Vishnu, Joshi, J., Evans, G., Mitra, S., Sathe, M., Doroodchi, E., Utikar, Ranjeet, Shah, Milinkumar, Pareek, Vishnu, Joshi, J., and Evans, G.

Abstract

In this work, subcooled droplet impact on a highly thermally conductive spherical surface was investigated both theoretically and experimentally. Specifically, the effect of Weber number on spreading of droplets of three different liquids namely water, isopropyl alcohol and acetone was studied. The droplet shape evolution and surface wetting upon droplet impact at surface temperatures ranging between 20 °C and 250 °C were investigated using a high speed camera. Maximum droplet spread was measured and compared with available correlations. Generally wetting contact was observed at surface temperatures below or close to saturation temperature whilst a non-wetting contact was exhibited at surface temperatures significantly greater than the saturation temperature. The drop in surface temperature was found to be significantly lower in this non-wetting contact regime which led to significant reduction in heat transfer coefficient. Despite a very small temperature drop in the film boiling regime indicating small fraction of vaporization, Schlieren imaging of acetone droplets showed qualitative vapour field around the rebounding droplets. The droplet spreading patterns in cold condition and film boiling regime were simulated using the 3D CFD models which were found to be in good agreement with the experimental observations.

Published
2013

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