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Ocena zawartości włókna surowego w wybranych otrębach pszennych

Borkowska B., Datta A.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2016

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nr 93

38--45

PL

Przeprowadzone badania miały na celu określenie zawartości włókna surowego i wilgotności w otrębach pszennych zwykłych i granulowanych ze śliwkami trzech wybranych producentów (A), (B) i (C). W przygotowanym materiale badawczym oznaczono zawartość włókna surowego i wilgotność otrąb pszennych. Zawartość włókna surowego w badanych otrębach pszennych była zróżnicowana i wahała się w granicach od 3,9% u producenta A do 11,5% u producenta B. Oznaczona wilgotność otrąb pszennych była zgodna z wymaganiami normy, z wyjątkiem otrąb pszennych zwykłych producenta B, w których wilgotność została przekroczona o 1,3%.

EN

The objective of the research was to determine the content of crude fibre and moisture in standard and granulated wheat bran with plums of three selected producers (A), (B), (C). The content of crude fibre and moisture of wheat bran were determined in the research material. The content of crude fibre in the examined wheat bran varied between 3,9% (producer A) and 11,5% (producer B). The determined moisture content of wheat bran was in accordance with the requirements of the norm, with the exception of standard wheat bran (producer B), in which moisture content was exceeded by 1,3%.

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A closed-loop power controller model of series-resonant-inverter-fitted induction heating system

Pal P., Roy D., Datta A., Sadhu P. K., Banerjee A.

Archives of Electrical Engineering

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2016

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Vol. 65, nr 4

827--841

EN

This paper presents a mathematical model of a power controller for a high-frequency induction heating system based on a modified half-bridge series resonant inverter. The output real power is precise over the heating coil, and this real power is processed as a feedback signal that contends a closed-loop topology with a proportional-integral-derivative controller. This technique enables both control of the closed-loop power and determination of the stability of the high-frequency inverter. Unlike the topologies of existing power controllers, the proposed topology enables direct control of the real power of the high-frequency inverter.

3

T-cell proliferation on immunopathogenic mechanism of psoriasis: a control based theoretical approach

Datta A., Roy P. K.

Control and Cybernetics

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2013

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Vol. 42, no. 2

365--386

EN

Psoriasis vulgaris is a common, worldwide autoimmune skin disorder characterized by T-cells mediated hyperproliferation of keratinocytes. The feature of T-cells arbitrated psoriatic lesions is the epidermal infiltration of oligoclonal CD8+ T-cells and also of CD4+ T-cells in the dermis. Psoriatic scratches are identified by red and enlarged lesions along with silver whitish scales. In this article, we propose a mathematical model for psoriasis, involving a set of differential equations, concerning T-cells, dendritic cells and epidermal keratinocytes. We introduce T-cell proliferation in the system, where T-cells are generated through expansion of accessible CD4+ T-cells from precursors. We are interested in observing how the cell biological system develops through T-cell proliferation in presence of control with respect to T-cells and keratinocytes. We study the model in both implicit and explicit ways and measure the effect of drug on the system through impulsive drug therapy.

4

Simulation of steady laminar blood flow through arterial stenosis using computational fluid dynamics

Banerjee M. K., Ganguly R., Datta A.

International Journal of Applied Mechanics and Engineering

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2009

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Vol. 14, no 1

91-111

EN

The flow of blood through a rigid artery with different degrees of stenosis has been studied. Two different shapes (rectangular and cosine) of stenosis are considered while blood is modeled either as a Newtonian or non-Newtonian fluid. Three different degrees of stenosis, expressed in percentage, are considered representing mild to severe stenoses. The flow separates from the arterial wall at the stenosis and reattaches at a point downstream, forming a recirculating eddy. The pressure drop over the length of the artery varies for the different cases indicating the impact on the heart. A peak in the wall shear stress is observed at the location of the stenosis and zero stress points are observed where the flow separates and reattaches the wall. Results show marked differences in the flow pattern and shear stress between Newtonian and non-Newtonian models. Moreover, the power-law model exhibits a different trend as compared to the Casson model in predicting the flow field and wall shear stress.