Skocz do pozycji: 1.

Tytuł:

Branch and bound algorithm for discrete multi- level linear fractional programming problem

Autorzy:

Arora, R.
Gupta, K.

Powiązania:

https://bibliotekanauki.pl/articles/406478.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

linear fractional programming problem
bilevel programming
multilevel programming
discrete variables
integer solution
branch and bound cut
programowanie dwustopniowe
programowanie wielopoziomowe
zmienne dyskretne

Opis:

An algorithm is proposed to find an integer solution for bilevel linear fractional programming problem with discrete variables. The method develops a cut that removes the integer solutions which are not bilevel feasible. The proposed method is extended from bilevel to multilevel linear fractional programming problems with discrete variables. The solution procedure for both the algorithms is elucidated in the paper.

Źródło:

Operations Research and Decisions; 2018, 28, 2; 5-21
2081-8858
2391-6060

Pojawia się w:

Operations Research and Decisions

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Fuzzy goal programming technique for multi-objective indefinite quadratic bilevel programming problem

Autorzy:

Arora, R.
Gupta, K.

Powiązania:

https://bibliotekanauki.pl/articles/1403683.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

bilevel programming
indefinite quadratic programming
multi-objective programming
pay-off matrix
Taylor series approximation
LINGO 17.0

Opis:

Bilevel programming problem is a non-convex two stage decision making process in which the constraint region of upper level is determined by the lower level problem. In this paper, a multi-objective indefinite quadratic bilevel programming problem (MOIQBP) is presented. The defined problem (MOIQBP) has multi-objective functions at both the levels. The followers are independent at the lower level. A fuzzy goal programming methodology is employed which minimizes the sum of the negative deviational variables of both the levels to obtain highest membership value of each of the fuzzy goal. The membership function for the objective functions at each level is defined. As these membership functions are quadratic they are linearized by Taylor series approximation. The membership function for the decision variables at both levels is also determined. The individual optimal solution of objective functions at each level is used for formulating an integrated pay-off matrix. The aspiration levels for the decision makers are ascertained from this matrix. An algorithm is developed to obtain a compromise optimal solution for (MOIQBP). A numerical example is exhibited to evince the algorithm. The computing software LINGO 17.0 has been used for solving this problem.

Źródło:

Archives of Control Sciences; 2020, 30, 4; 683-699
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Surface waves in non-homogeneous, general magnetothermo, viscoelastic media of higher order

Autorzy:

Sethi, M.
Gupta, K. C.
Rani, M.

Powiązania:

https://bibliotekanauki.pl/articles/955273.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

fale powierzchniowe
lepkość
lepkosprężystość
inhomogeneous media
variable density
surface waves
viscosity

Opis:

The aim of the present paper is to investigate surface waves in a non-homogeneous, isotropic, visco-elastic solid medium of n-th order including the time rate of strain. The theory of generalised surface waves has firstly been developed and then it has been employed to investigate particular cases of waves, viz., Stoneley, Rayleigh and Love type. The wave velocity equations have been obtained for different cases and are in well agreement with the corresponding classical result, when the effects of viscosity, temperature, magnetism as well as nonhomogeneity of the material medium are ignored.

Źródło:

International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1221-1236
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

QSAR modeling for acute toxicity prediction in rat by common painkiller drugs

Autorzy:

Roy, J.S.
Gupta, K.
Talapatra, S.N.

Powiązania:

https://bibliotekanauki.pl/articles/11550.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Opis:

Painkiller drugs or analgesics are potent pain reliever chemical agents, which are commonly used in pain therapy. Mathematical modeling by QSAR (quantitative structure activity relationship) methods are well known practices to determine predictive toxicity in biota. Now-adays, an easy screening of chemicals, QSAR can be done by using several recommended softwares. The present study was carried out by using software namely T.E.S.T. (Toxicity estimation software tool) for rat oral LD50 (median lethal dose) predictive toxicity for common painkiller drugs. These painkiller drugs were selected as 35 compounds and tabulated on the basis characteristics of one non-narcotic viz. acetaminophen, twenty non-steroidal anti-inflammatory such as bromofenac, diclofenac, diflunsial, etodolac, fenoprofen, flurbiprofen, ibuprofen, indomethacin, ketoprofen, ketorolac, maclofenamate sodium, mefenamic acid, meloxicam, nabumetone, naproxen, oxaprozin, phenylbutazone, piroxicam, sulindac and tolmetin as well as fourteen narcotic viz. buprenorphine, butorphanol, codeine, hydrocodone, hydromorphone, levorphanol, meperidine, methadone, morphine, nalbuphine, oxycodone, pentazocine, dextropropoxyphene and tapentadol. The data were tabulated on experimental (bioassay) from ChemIDPlus and T.E.S.T. and predictive toxicity of 30 compounds out of 35 compounds by using T.E.S.T. The predictive data were found by T.E.S.T. that 20 and 10 compounds were very toxic and moderately toxic respectively but not extremely, super toxic and non-toxic in rat model after acute oral exposure. It is suggested to evaluate the predicted data further with other available recommended softwares with different test models like daphnia, fish etc. to know aquatic toxicity when these compounds may discharge into waterbodies.

Źródło:

International Letters of Natural Sciences; 2016, 52
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Using Web Services to enhance Geographic Information Systems

Autorzy:

Ladner, R.
Petry, F.
Warner, E.
Gupta, K.

Powiązania:

https://bibliotekanauki.pl/articles/970472.pdf

Data publikacji:

2006

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

ontologia
usługa WWW
dane przestrzenne
system informacji przestrzennej
ontology
web services
spatial data
GIS
geographic information systems

Opis:

In this paper we describe an approach to the extension of geographic information systems to take advantage of the continuing development of capabilities of the Semantic Web. This is presented in the context of a portal based Geospatial Information Database (GIDB™), an object-oriented spatial database capable of storing multiple data types from multiple sources. We have developed our approach for a specific domain, spatially oriented, meteorological and oceanographic, but this can clearly be applied to other Spatial data domains. Finally we illustrate the use of the ontology development system based on Generative Sublanguage Ontologies (GSO), a type of linguistic ontology inspired by the Generative Lexicon Theory, to develop effective domain ontologies.

Źródło:

Control and Cybernetics; 2006, 35, 1; 29-46
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

To predict human Biomarker for the obesity using mouse homologous expression data at different theiler stages

Autorzy:

Kumar, A.
Puri, R.
Gupta, K.
Pal, A.

Powiązania:

https://bibliotekanauki.pl/articles/11371.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Opis:

There are numerous genetic factors like MC4R (Melanocortin-4 receptor), POMC (Proopiomelanocortin), SIM1 (Single Minded Gene) etc. important in obesity, which can be used as biomarker. But more reliable diagnostic markers are the need for today, along with new therapeutic strategies that target specific molecules in the disease pathways. As in mouse and human genes, where mutations in one or both species are associated with some phenotypic characteristics as observed in human disease. In molecular mechanisms of development, differentiation, and disease gene expression data provide crucial insights. Up-regulation and down-regulation of selective genes can have major effects on diet-induced obesity, but there is little or no effect when animals are fed a low-fat diet. In present study we have studied the gene expression data of mouse at different theiler stages using GXD BioMart. The interacting partners and pathway of the genes that are already used as biomarker in mouse as well as in humans have been studied. A gene NPY1R (Neuropeptide Y1 receptor) was taken as common after STRING and KEGG results on the basis of biochemical pathways and interactions similar to MC4R. Our present work focuses on comparative genomics and proteomics analysis of NPY1R, which has led to identification of biomarker by comparing it with already known MC4R human and mouse biomarker. It has been concluded that both the proteins are structurally and functionally similar.

Źródło:

International Letters of Natural Sciences; 2015, 45
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Surface waves in fibre-reinforced anisotropic solid elastic media under the influence of gravity

Autorzy:

Sethi, M.
Gupta, K. C.
Gupta, D.
Manisha, -

Powiązania:

https://bibliotekanauki.pl/articles/955330.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

fale powierzchniowe
lepkość
fala Rayleigha
siła ciężkości
fibre-reinforced medium
surface waves
viscosity
Rayleigh waves
gravity

Opis:

The aim of the present paper is to investigate surface waves in an anisotropic, elastic solid medium under the influence of gravity. First, a theory of generalised surface waves was developed and then it was employed to investigate particular cases of waves, viz., Stoneley and Rayleigh, Love type. The wave velocity equations were obtained for different cases and they are in well agreement with the corresponding classical result, when the effect of gravity, viscosity as well as parameters for fibre-reinforcement of the material medium are ignored.

Źródło:

International Journal of Applied Mechanics and Engineering; 2013, 18, 1; 177-188
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Text mining approach to analyse the relation between obesity and breast cancer data

Autorzy:

Kumar, A.
Thakur, P.
Gupta, K.
Pal, A.

Powiązania:

https://bibliotekanauki.pl/articles/10908.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Opis:

Biomedical research needs to leverage and exploit large amount of information reported in scientific publication. Literature data collected from publications has to be managed to extract information, transforms into an understandable structure using text mining approaches. Text mining refers to the process of deriving high-quality information from text by finding relationships between entities which do not show direct associations. Therefore, as an example of this approach, we present the link between two diseases i.e. breast cancer and obesity.Obesity is known to be associated with cancer mortality, but little is known about the link between lifetime changes in BMI of obese person and cancer mortality in both males and females. In this article, literature data for obesity and breast cancer was obtained using PubMed database and then methodologies which employs groups of common genes and keywords with their frequency of occurrence in the data were used, aimed to establish relation between obesity and breast cancer visualized using Pi-charts and bar graphs. From the data analysis, we obtained 1 gene which showed the link between both the diseases and validated using statistical analysis and disease-connect web server. We also proposed 8 common higher frequency keywords which could be used for indexing while searching the literature for obesity and breast cancer in combination.

Źródło:

International Letters of Natural Sciences; 2015, 44
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Biomonitoring of river Ganga bank by identifying mollusc species as an indicator

Autorzy:

Gupta, K.
Nandy, A.
Banerjee, K.
Talapatra, S.N.

Powiązania:

https://bibliotekanauki.pl/articles/10869.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Opis:

The present study deals with biomonitoring to know mollusc species as an indicator. In the present study, presence, absence and abundance of particular gastropod and bivalve species were identified in the different banks of river Ganga. The study was carried out at two experimental sites, Sodepur (Exp-1) and Khardah (Exp-2), West Bengal, India as the area exhibits a major sewage water outfall in the river compared with upstream control site, Kalyani (Cont-1) and downstream control site, Batanagar (Cont-1). The present biomonitoring shows qualitatively and quantitatively that in experimental no mollusc species were observed near the wastewater discharge area into the bank of river Ganga at Khardah while both sites of the sewage discharge area into the bank of river Ganga at Sodepur particular gastropod Bellamya sp. were observed when compared to control area. The highest variety and total nos of gastropods and bivalves (280 nos) were recorded in the upstream at Kalyani and lowest variety and total nos of only gastropods (150 nos) were recorded in the downstream at Batanagar. The present biomonitoring work was a preliminary observation to know sensitive and tolerant or accumulator mollusc species in the bank of river Ganga from a stretch of Kalyani (upstream) to Batanagar (downstream) in between urban wastewater discharge area (Sodepur and Khardah). Further researches must be relevant in relation to biomarker assessment with the physico-chemical factors and stress tolerant detoxification mechanism of particular mollusc species.

Źródło:

International Letters of Natural Sciences; 2015, 37
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Biomonitoring tool: morphological anomalies in Zygnema sp. of Ganga River Bank

Autorzy:

Das, K.
Gupta, K.
Swarnakar, S.
Talapatra, S.N.

Powiązania:

https://bibliotekanauki.pl/articles/11639.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Opis:

The present study aims to detect morphological abnormalities in Zygnema sp. because this test species have high adaptive capacity in unfavourable environmental stress. This alga is inhabited at the suburban bank of river Ganga, West Bengal, India. The study was done at experimental sites, downstream at Khardah near sewage water mixing area was compared with upstream control site Kalyani as no sewage water discharge. External and internal abnormal morphology such as undulating or wavy and extra outgrowth on cell wall, sometimes bending inwardly and outwardly as external deformities while internal anomalies such as pigment loss, nucleus was in circular, rectangular, oval and amoeboid shapes, also vacuolated and trilobed, broom like chloroplasts and central part of the thallas dried in between two segments. It was observed that this test species was surviving and well adapted with above mentioned deformities. The present preliminary study with Zygnema sp. can be utilized for in situ and ex situ indicator species for riverine biomonitoring. Further research may be relevant to know both tolerant and sensitive algae species inhabited at the river Ganga bank alongwith biochemical and genetic parameters. The present work is suggesting that other inhabiting algae and this adaptive test species can be used for bioremediation of pollutants.

Źródło:

International Letters of Natural Sciences; 2015, 47
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

New insights into functional roles of nitric oxide in roots

Autorzy:

Gupta, K.
Igamberdiev, A.
Kruger, N.
Kaiser, W.
Ratcliffe, G.

Powiązania:

https://bibliotekanauki.pl/articles/80596.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

conference
nitric oxide
nitrate reductase
electron transport chain
mitochondrion
root
proton pumping
alternative oxidase

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

The role of alternative oxidase in hypoxic metabolism of nitric oxide

Autorzy:

Igamberdiev, A.
Shah, J.
Cochrane, D.
Gupta, K.
Vanlerberghe, G.

Powiązania:

https://bibliotekanauki.pl/articles/81011.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

conference
alternative oxidase
cytochrome C oxidase
nitric oxide
metabolism
hypoxia
gene expression
oxygen condition

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Catalyst regeneration techniques in naphtha reforming: Short review

Autorzy:

Gupta, Aviral
Gupta, S. K.

Powiązania:

https://bibliotekanauki.pl/articles/2173419.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

heterogeneous catalysis
regeneration
naphtha reforming
catalyst reactivation
non-linear
modelling
kataliza heterogeniczna
regeneracja
reformowanie benzyny ciężkiej
reaktywacja katalizatora
modelowanie

Opis:

Catalytic reforming is an important intermediate in the processing of crude (naphtha in particular) to obtain gasoline. The catalyst used in the process (platinum) is quite expensive and may negatively impact the business if not used judiciously. The aforesaid not only refers to the reduction in loss of the catalyst per unit of gasoline produced but also to the manufacturing of an environmentally friendlier product alongside which is the need of the planet and also a necessity to meet the increasingly strict government norms. In order to meet the above requirements, various refineries around the world use various well-known conventional methods which depend on the quality and quantity of crude manufactured by them. This paper focuses on highlighting recent advancements in methods of catalytic regeneration (CR) in the reforming unit of petroleum industries to produce high octane gasoline, without any major replacements in their existing setup. Research papers formulated by the application of methodologies involving non-linear models and real-time refinery data have only been considered to avoid any deviations/errors in practical applications. In-depth analysis of these papers has led to the origin of some ideas which have been included as suggestions and can be considered as subjects of further research. In all, the objective of the paper is to serve as a reference for researchers and engineers working on devising optimum methods to improve the regeneration of reforming catalysts.

Źródło:

Chemical and Process Engineering; 2022, 43, 2; 101--108
0208-6425
2300-1925

Pojawia się w:

Chemical and Process Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Vibration of non-homogeneous visco-elastic circular plate of linearly varying thickness in steady state temperature field
Drgania niejednorodnej lepko-sprężystej płyty kołowej o liniowo zmiennej grubości i ustalonym polu temperatury

Autorzy:

Gupta, A. K.
Kumar, L.

Powiązania:

https://bibliotekanauki.pl/articles/280105.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

non-homogeneous
visco-elastic
variable thickness
steady state temperature field

Opis:

An analysis is presented for free vibration of a non-homogeneous visco-elastic circular plate with linearly varying thickness in the radial direction subjected to a linear temperature distribution in that direction. The governing differential equation of motion for free vibration is obtained by the method of separation of variables. Rayleigh-Ritz's method has been applied. Deflection, time period and logarithmic decrement corresponding to the first two modes of vibrations of a clamped non-homogeneous visco-elastic circular plate for various values of non-homogeneity parameter, taper constant and thermal gradients are obtained and shown graphically for the Voigt-Kelvin model.
W pracy przedstawiono analizę drgań swobodnych niejednorodnej lepko- sprężystej płyty kołowej o liniowo zmiennej grubości w kierunku promieniowym i poddanej polu temperatury o liniowym rozkładzie w tym kierunku. Konstytutywne równanie różniczkowe ruchu dla drgań swobodnych otrzymano poprzez separację zmiennych. Zastosowano metodę Rayleigha-Ritza. W wyniku analizy wyznaczono ugięcie płyty, okres drgań i logarytmiczny dekrement tłumienia dwóch pierwszych postaci drgań dla warunków brzegowych odpowiadających zamocowaniu niejednorodnej płyty na brzegu. Wyniki przedstawiono graficznie w funkcji parametru niejednorodności, stałej zawężania grubości oraz zmiennego gradientu temperatury przy wykorzystaniu modelu reologicznego Kelvina-Voigta opisującego właściwości materiału płyty.

Źródło:

Journal of Theoretical and Applied Mechanics; 2010, 48, 1; 255-266
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:

Exponential temperature effect on frequencies of a rectangular plate of non-linear varying thickness: a quintic spline technique

Autorzy:

Gupta, A. K.
Mamta, J.

Powiązania:

https://bibliotekanauki.pl/articles/949230.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

exponentially temperature
non-linear
thickness variation
vibration
rectangular plate

Opis:

The differential equation governing the transverse motion of an elastic rectangular plate of non-linear thickness variation with thermal gradient has been analyzed on the basis of classi- cal plate theory. Following Levy’s approach, i.e. the two parallel edges are simply supported, the fourth-order differential equation governing the motion of such plates of non-linear vary- ing thickness in one direction with exponentially temperature distribution has been solved by using the quintic splines interpolation technique for two different combinations of clamped and simply supported boundary conditions at the other two edges. An algorithm for com- puting the solution of this differential equation is presented for the case of equal intervals. The effect of thermal gradient together with taper constants on the natural frequencies of vibration is illustrated for the first three modes of vibration.

Źródło:

Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 15-24
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

C-compactness Via Grills

Autorzy:

Gupta, M. K.
Gaur, Monika

Powiązania:

https://bibliotekanauki.pl/articles/1159576.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

C-compact
G-compact
Grill
Quasi-H-closed

Opis:

In the present paper, we study C-compactness with respect to a grill, which simultaneously generalizes C-compactness and G-compactness and term it as C(G)-compact space. Several of its properties are investigated and effects of various kinds of functions on them are studied.

Źródło:

World Scientific News; 2018, 113; 130-137
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Assessment of surface roughness in MQL assisted turning process of titanium alloy with application of TOPSIS-AHP method

Autorzy:

Bartoszuk, M.
Gupta, M. K.

Powiązania:

https://bibliotekanauki.pl/articles/99597.pdf

Data publikacji:

2018

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

titanium alloy
turning parameters
optimization
surface roughness
minimum quantity lubrication

Opis:

The optimization of surface roughness values considered as one of the most significant issues regarding turning process of titanium alloys with the use of minimum quantity lubrication (MQL) method. With such an aim in mind, the application of TOPSIS-AHP method is implemented in order to establish the most favourable cutting parameters for the following values of surface roughness: R_a, R_q and R_z in machining of titanium alloys regarding MQL conditions. The proposed methodology consists of the two stages. At the beginning, tests on turning process were performed on CNC lathe, taking feed rate, approach angle, and cutting speed as input parameters. Then, the TOPSIS-AHP method was applied on the given experimental data and the optimum machining parameters were determined. The findings from current investigations showed that, lower values of cutting speed, feed rate and middle value of approach angle shows the optimal results.

Źródło:

Journal of Machine Engineering; 2018, 18, 2; 97-105
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Hall effect on thermal instability of viscoelastic dusty fluid in porous medium

Autorzy:

Singh, M.
Gupta, R. K.

Powiązania:

https://bibliotekanauki.pl/articles/265280.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

niestabilność termiczna
płyn lepkosprężysty
porowatość
thermal instability
Rivlin-Ericksen viscoelastic fluid
suspended particles
Hall current effect
porous medium

Opis:

The effect of Hall currents and suspended dusty particles on the hydromagnetic stability of a compressible, electrically conducting Rivlin-Ericksen elastico viscous fluid in a porous medium is considered. Following the linearized stability theory and normal mode analysis the dispersion relation is obtained. For the case of stationary convection, Hall currents and suspended particles are found to have destabilizing effects whereas compressibility and magnetic field have stabilizing effects on the system. The medium permeability, however, has stabilizing and destabilizing effects on thermal instability in contrast to its destabilizing effect in the absence of the magnetic field. The critical Rayleigh numbers and the wave numbers of the associated disturbances for the onset of instability as stationary convection are obtained and the behavior of various parameters on critical thermal Rayleigh numbers are depicted graphically. The magnetic field, Hall currents and viscoelasticity parameter are found to introduce oscillatory modes in the systems, which did not exist in the absence of these parameters.

Źródło:

International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 871-886
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

On thermosolutal convection in presence of compressible fluid with fine dust

Autorzy:

Singh, M.
Gupta, R. K.

Powiązania:

https://bibliotekanauki.pl/articles/955304.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

płyn lepkosprężysty
ściśliwość
płyn warstwowy
Rivlin-Ericksen elastico-viscous fluid
compressible and fine dust

Opis:

A layer of a Rivlin-Ericksen elastico-viscous fluid heated and soluted from below in the presence of compressibility and suspended particles (fine dust) effect is considered. For stationary convection, the Rivlin- Ericksen, elastico-viscous fluid behaves like a Newtonian fluid. The oscillatory modes are introduced due to the presence of a stable solute gradient, suspended particles destabilize the system whereas the stable solute gradient has a stabilizing effect on the system and the effect of compressibility is to postpone the onset of thermosolutal convection. The stable solute gradient and compressibility postpone the onset of convection, whereas the suspended particles hasten the onset of convection. The stable solute gradient introduces oscillatory modes in the systems which were non-existent in its absence.

Źródło:

International Journal of Applied Mechanics and Engineering; 2014, 19, 1; 133-143
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Marangoni convection in a relatively hotter or cooler liquid layer with free boundaries

Autorzy:

Gupta, A. K.
Shandil, R. G.

Powiązania:

https://bibliotekanauki.pl/articles/265233.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

napięcie powierzchniowe
konwekcja
przewodzenie
stabilność liniowa
surface tension
convection
conducting
linear stability

Opis:

In this paper, we study the onset of cellular convection in a horizontal fluid layer heated from below, with a free-slip boundary condition at the bottom when the driving mechanism is surface tension at the upper free surface, in the light of the modified analysis of Banerjee et al. (Jour. Math. & Phys. Sci., 1983, 17, 603). This leads to a formulation of the problem which depends upon whether the liquid layer is relatively hotter or cooler. It is found that the phenomenon of surface tension driven instability problems should not only depend upon the Marangoni number which is proportional to the maintained temperature differences across the layer but also upon another parameter that arises due to variation in the specific heat at constant volume on account of the variations in temperature. Numerical results are obtained for the problem wherein the lower free boundary is perfectly thermally conducting.

Źródło:

International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 581-588
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Analysis of through transmission laser welding of Nylon6 by finite element simulation

Autorzy:

Gupta, S. K.
Pal, P. K.

Powiązania:

https://bibliotekanauki.pl/articles/407048.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

laser transmission welding
simulation
through transmission laser welding
glass transition temperature
finite element method

Opis:

Over the years laser welding has evolved as a fabrication process capable of overcoming the limitations of conventional joining methodologies. It facilitates the welding of diverse range of materials like metals, non-metals, polymers etc. Laser transmission welding is a technique employed for fabricating intricate shapes/contours in polymers with better precision compared to the other conventional processes. Nylon6, a synthetic semi-crystalline polymer is utilized as an engineering thermoplastic due to its high strength and temperature resistant properties. In the earlier researches, various welding techniques were employed for the fabrication of polymers and metals keeping the laser beam stagnant, and much emphasis was given only to temperature distribution along the different axes and limited attention was given to residual stress analysis. Therefore, in this research work, a three-dimensional time-dependent model using a moving laser beam is used to fabricate unreinforced Nylon6 specimens.

Źródło:

Management and Production Engineering Review; 2018, 9, 4; 56-69
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Trend of arsenic pollution and subsequent bioaccumulation in Oryza sativa and Corchorus capsularis in Bengal Delta

Autorzy:

Bhattacharya, S.
Guha, G.
Gupta, K.
Chattopadhyay, D.
Mukhopadhyay, A.
Ghosh, U.C.

Powiązania:

https://bibliotekanauki.pl/articles/10831.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

trend
arsenic pollution
bioaccumulation
rice
Oryza sativa
jute
Corchorus capsularis
Bengal Delta zob.Ganges Delta
Ganges River
Ganges Delta

Opis:

Oryza sativa Linn. (rice) and Corchorus capsularis Linn. (jute) are the two major crops of the Bengal basin. Both rice and jute are generally grown in submerged flooded conditions, where arsenic bioavailability is high in soil. The consumers of the edible parts from both plants therefore face an inevitable source of exposure to arsenic, with consequent accumulation and toxicity. The objective of the study was to observe the in-vivo temporal variation of arsenic bioaccumulation in the different parts of O. sativa and C. capsularis. Rice plant specimens (Aman rice, Ratna variety) of different age groups (1, 2 and 3 months old) were analyzed in HG-AAS for absorbed arsenic content in different parts. The accumulation of arsenic remained significantly high in the initial phase of growth, but decreased with time. Amount of arsenic bioaccumulation followed the decreasing order: root > basal stem > median stem > apical stem > leaves > grains in all the three age groups of the rice plant samples. C. capsularis followed a trend of arsenic bioaccumulation similar to O. sativa. O. sativa had more accumulation potential than C. capsularis, but C. capsularis showed much higher efficiency of arsenic translocation in the above ground parts. This is the first ever report of time-dependent decrease in arsenic bioaccumulation in O. sativa and C. capsularis. The contamination level can reach the grain part in significant amount and can cause health hazards in more severely arsenic affected areas. Intensive investigation on a complete food chain is urgently needed in the arsenic contaminated zones for further risk assessments.

Źródło:

International Letters of Natural Sciences; 2014, 16
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Positronium Fraction and Positron Life Time at Ni(110) and Ge(110) Surfaces

Autorzy:

Shrivastava, S. B.
Gupta, V. K.

Powiązania:

https://bibliotekanauki.pl/articles/1887749.pdf

Data publikacji:

1991-06

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

68.35.-p
25.30.Hm

Opis:

The fraction of positronium formation and the positron lifetime at Ni(110) and Ge(110) surfaces, when low-energy positrons incident on them, have been calculated using the rate equations approach and positron trapping in image potential well. The calculated results are compared with the available experimental results. The positronium fraction is overestimated at high temperatures in case of Ni(110).

Źródło:

Acta Physica Polonica A; 1991, 79, 6; 853-859
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

A Scheme for Template Security at Feature Fusion Level in Multimodal Biometric System

Autorzy:

Selwal, A.
Gupta, S. K.
Kumar, S.

Powiązania:

https://bibliotekanauki.pl/articles/102518.pdf

Data publikacji:

2016

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

feature template
biometric data
feature vectors
multimodal biometrics
fuzzy sets
database
feature fusion

Opis:

Biometrics is the science of human recognition by means of their biological, chemical or behavioural traits. These systems are used in many real life applications simply from biometric based attendance system to providing security at a very sophisticated level. A biometric system deals with raw data captured using a sensor and feature template extracted from raw image. One of the challenges being faced by designers of these systems is to secure template data extracted from the biometric modalities of the user and protect the raw images. In order to minimize spoof attacks on biometric systems by unauthorised users one of the solutions is to use multi-biometric systems. Multi-modal biometric system works by using fusion technique to merge feature templates generated from different modalities of the human. In this work, a novel scheme is proposed to secure template during feature fusion level. The scheme is based on union operation of fuzzy relations of templates of modalities during fusion process of multimodal biometric systems. This approach serves dual purpose of feature fusion as well as transformation of templates into a single secured non invertible template. The proposed technique is irreversible, diverse and experimentally tested on a bimodal biometric system comprising of fingerprint and hand geometry. The given scheme results into significant improvement in the performance of the system with lower equal error rate and improvement in genuine acceptance rate.

Źródło:

Advances in Science and Technology. Research Journal; 2016, 10, 31; 23-30
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Fixed point theorem in 2 non-archimedean Menger PM-Space using weakly L-compatible and weakly M-compatible mappings

Autorzy:

Gupta, V. K.
Jain, Arihant
Kushwah, Jaya

Powiązania:

https://bibliotekanauki.pl/articles/744861.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

Non-Archimedean Menger probabilistic metric space
Common fixed points
compatible maps
weakly L-compatible and Weakly M-compatible maps

Opis:

In the present paper, we extend and generalize the result of Cho et. al. [1] by introducing the notion of weakly L-compatible and weakly M-compatible maps in a 2 non-Archimedean Menger PM-space.

Źródło:

Commentationes Mathematicae; 2011, 51, 2
0373-8299

Pojawia się w:

Commentationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Comparative study of GA & DE algorithm for the economic operation of a power system using FACTS devices

Autorzy:

Bhattacharyya, B.
Gupta, V. K.
Kumar, S.

Powiązania:

https://bibliotekanauki.pl/articles/141459.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

FACTS devices
line power flow
FACTS devices & its optimal locations
genetic algorithm
differential evolution technique

Opis:

The problem of improving the voltage profile and reducing power loss in electrical networks must be solved in an optimal manner. This paper deals with comparative study of Genetic Algorithm (GA) and Differential Evolution (DE) based algorithm for the optimal allocation of multiple FACTS (Flexible AC Transmission System) devices in an interconnected power system for the economic operation as well as to enhance loadability of lines. Proper placement of FACTS devices like Static VAr Compensator (SVC), Thyristor Controlled Switched Capacitor (TCSC) and controlling reactive generations of the generators and transformer tap settings simultaneously improves the system performance greatly using the proposed approach. These GA & DE based methods are applied on standard IEEE 30 bus system. The system is reactively loaded starting from base to 200% of base load. FACTS devices are installed in the different locations of the power system and system performance is observed with and without FACTS devices. First, the locations, where the FACTS devices to be placed is determined by calculating active and reactive power flows in the lines. GA and DE based algorithm is then applied to find the amount of magnitudes of the FACTS devices. Finally the comparison between these two techniques for the placement of FACTS devices are presented.

Źródło:

Archives of Electrical Engineering; 2013, 62, 4; 541-552
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Free vibration of clamped visco-elastic rectangular plate having bi-direction exponentially thickness variations

Autorzy:

Gupta, A. K.
Khanna, A.
Gupta, D. V.

Powiązania:

https://bibliotekanauki.pl/articles/281741.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

viscoelasticity
clamped rectangular plate
variable thickness

Opis:

Free vibration of a clamped visco-elastic rectangular plate having bi-direction exponentially varying thickness has been analysed on the basis of classical plate theory. For visco-elastic materials, basic elastic and viscous elements are combined. We have assumed the Kelvin model for visco-elasticity, which is a combination of elastic and viscous elements connected in parallel. Here, the elastic element is constituted by a spring and the viscous one is a dashpot. An approximate but quite convenient frequency equation is derived by using the Rayleigh-Ritz technique. Logarithmic decrement, time period and deflection (at two different instant of time) for the first two modes of vibration and for various values of the taper constants and aspect ratio are calculated. Comparison studies have been carried out with bi-linearly thickness variation to establish the accuracy and versatility of the method.
W pracy rozważono problem swobodnych drgań utwierdzonej lepkosprężystej prostokątnej płyty o dwukierunkowo wykładniczo zmiennej grubości na podstawie klasycznej teorii płyt. Uwzględniono lepkosprężyste właściwości materiału płyty, bazując na podstawowych elementach reologicznych. Przyjęto model Kelvina, tj. równoległą kombinację elementu sprężystego i wiskotycznego. Równanie ruchu płyty rozwiązano metodą Rayleigha-Ritza, otrzymując przybliżoną, ale wygodną do analizy postać wyrażenia w dziedzinie częstości. Następnie wyznaczono wartość logarytmicznego dekrementu tłumienia, okresu drgań i ugięcia płyty dla dwóch pierwszych funkcji własnych dla różnych parametrów opisujących zmienną grubość i wymiary zewnętrzne płyty. Wyniki obliczeń przy uwzględnieniu zmiany grubości płyty porównano z dotychczasowymi rezultatami badań w celu potwierdzenia dokładności i uniwersalności metody.

Źródło:

Journal of Theoretical and Applied Mechanics; 2009, 47, 2; 457-471
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Effect of periphery fixity on ballistic limit of thin aluminum plate subjected to blunt and ogival projectile impact

Autorzy:

Tiwari, G.
Iqbal, M. A.
Gupta, P. K.

Powiązania:

https://bibliotekanauki.pl/articles/955195.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

symulacja numeryczna
metoda elementów skończonych
aluminium
periphery fixity
blunt nosed projectile
ABAQUS

Opis:

Three-dimensional numerical simulations were carried out with the ABAQUS/explicit finite element code to study the influence of target boundary conditions on its ballistic limit. 1mm thick 1100-H12 aluminum target of 255 mm span diameter was hit by 19 mm diameter and 50.8 mm length blunt nosed projectile. The mass of the projectile was kept as 52.5 gm. The boundary condition effects on the ballistic limit were investigated by varying the target periphery boundary condition as fully clamped and partially clamped target (75%, 50% and 25%) subjected to projectile impact. The energy absorption and ballistic limit of the target was found to be significantly affected by the boundary conditions. Some of the finite element analysis results were compared with experimental and numerical results reported in international literature and a good agreement between the two was found.

Źródło:

International Journal of Applied Mechanics and Engineering; 2014, 19, 2; 379-395
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Influence of particle size on physical and sensory attributes of mango pulp powder

Autorzy:

Sharma, M.
Kadam, D.M.
Chadha, S.
Wilson, R.A.
Gupta, R.K.

Powiązania:

https://bibliotekanauki.pl/articles/25222.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Źródło:

International Agrophysics; 2013, 27, 3
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Comparative evaluation of inversion approaches of the radiative transfer model for estimation of crop biophysical parameters

Autorzy:

Mridha, N.
Sahoo, R.N.
Sehgal, V.K.
Krishna, G.
Pargal, S.
Pradhan, S.
Gupta, V.K.
Nagesh Kumar, D.

Powiązania:

https://bibliotekanauki.pl/articles/25984.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Opis:

The inversion of canopy reflectance models is widely used for the retrieval of vegetation properties from remote sensing. This study evaluates the retrieval of soybean biophysical variables of leaf area index, leaf chlorophyll content, canopy chlorophyll content, and equivalent leaf water thickness from proximal reflectance data integrated broad bands corresponding to moderate resolution imaging spectroradiometer, thematic mapper, and linear imaging self scanning sensors through inversion of the canopy radiative transfer model, PROSAIL. Three different inversion approaches namely the look-up table, genetic algorithm, and artificial neural network were used and performances were evaluated. Application of the genetic algorithm for crop parameter retrieval is a new attempt among the variety of optimization problems in remote sensing which have been successfully demonstrated in the present study. Its performance was as good as that of the look-up table approach and the artificial neural network was a poor performer. The general order of estimation accuracy for para-meters irrespective of inversion approaches was leaf area index > canopy chlorophyll content > leaf chlorophyll content > equivalentleaf water thickness. Performance of inversion was comparable for broadband reflectances of all three sensors in the optical region with insignificant differences in estimation accuracy among them.

Źródło:

International Agrophysics; 2015, 29, 2
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 31.

Tytuł:

Is complementary and alternative medicine effective in job satisfaction among dentists with musculoskeletal disorders? A cross sectional study
Czy medycyna komplementarna i alternatywna ma wpływ na satysfakcję zawodową dentystów z zaburzeniami mięśniowo-szkieletowymi? Badanie przekrojowe

Autorzy:

Gupta, Devanand
Bhaskar, Dara J.
Gupta, Rajendra K.
Jain, Ankita
Yadav, Priyanka
Dalai, Deepak R.
Singh, Rajeshwar
Singh, Nisha
Chaudhary, Varunjeet
Singh, Ankit
Yadav, Ankit
Karim, Bushra

Powiązania:

https://bibliotekanauki.pl/articles/2166243.pdf

Data publikacji:

2014-10-01

Wydawca:

Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi

Tematy:

medycyna komplementarna i alternatywna
dentysta
zaburzenia mięśniowo-szkieletowe
complementary and alternative medicine
dentist
musculoskeletal disorders

Opis:

Background: Musculoskeletal disorders have serious impact on the profession of dentistry. There is common occurrence of pain due to incorrect posture in dental professionals. Complementary and alternative medicine (CAM) therapies may cast a new light on preventing and intercepting musculoskeletal disorders (MSD). An epidemiological study was conducted in an effort to contribute to the prevention of musculoskeletal disorders in dentistry. The purpose of this study was to determine the prevalence of MSD at dentists using CAM as a treatment and preventive modality for MSD and to compare job/career satisfaction between dentists who use CAM and conventional therapy (CT). Material and Methods: Dentists registered in Uttrakhand state, India, under the Dental Council of India and registered members of the Indian Dental Association, Uttrakhand branch (N = 1496) were surveyed. Statistical analysis was conducted using SPSS 17. Results: A response rate of 84% (N = 1257) was obtained, revealing that 90% (N = 1131) had the problem of MSD. Seventy three percentage (N = 826) of dentists with MSD reported the use of CAM and CT. Complementary and alternative medicine users reported greater overall health (72.7% vs. 51%, p < 0.001), job satisfaction (61.2% vs. 35%, p < 0.001) and work efficiency compared to CT users. Conclusions: Complementary and alternative medicine therapies may improve quality of life, reduce work interruption and enhance job satisfaction for dentists who suffers from MSD. Through the course of their studies, dentists should be equipped with knowledge on ergonomics and CAM therapies, such as yoga and others, to help them prevent musculoskeletal disorders more effectively. Med Pr 2014;65(3):317–323
Wstęp: Zaburzenia mięśniowo-szkieletowe znacząco wpływają na wykonywanie zawodu przez lekarzy dentystów. W tej grupie zawodowej obserwuje się powszechne występowanie bólu z powodu nieprawidłowej postawy ciała. Terapie z zakresu medycyny komplementarnej i alternatywnej (complementary and alternative medicine - CAM) mogą rzucić nowe światło na zapobieganie zaburzeniom mięśniowo-szkieletowym (musculoskeletal disorders - MSD). Celem badania było ustalenie, czy w przypadku MSD dentyści korzystają z medycyny alternatywnej. Porównano także satysfakcję zawodową dentystów, którzy stosują terapie CAM i tych korzystających z terapii konwencjonalnej. Materiał i metody: W badaniu wzięli udział dentyści zarejestrowani w regionie Uttrakhand (Indie) w Radzie Dentystycznej Indii i będący członkami Indyjskiego Towarzystwa Dentystycznego (oddział Uttrakhand) (N = 1496). Analizy statystyczne przeprowadzono za pomocą pakietu SPSS 17. Wyniki: Wskaźnik odpowiedzi wyniósł 84% (N = 1257). Aż 90% (N = 1131) respondentów cierpiało z powodu MSD. Korzystanie z CAM i terapii konwencjonalnej zgłosiło 73% (N = 826) dentystów biorących udział w badaniu, u których występowały MSD. Osoby stosujące CAM w porównaniu z osobami leczącymi się konwencjonalnie zgłaszały lepszy ogólny stan zdrowia (72,7% vs 51%, p < 0,001), wyższy poziom satysfakcji zawodowej (61,2% vs 35%, p < 0,001) i były w stanie pracować w takim wymiarze czasu, w jakim chciały (56,8% vs. 67%, p < 0,001) Wnioski: Terapie CAM mogą poprawić jakość życia, zredukować przerwy w pracy i zwiększyć satysfakcję zawodową u dentystów cierpiących na MSD. Już na etapie studiów należy przekazać dentystom wiedzę z zakresu ergonomii oraz terapii CAM, żeby potrafili skuteczniej zapobiegać wystąpieniu zaburzeń mięśniowo-szkieletowych. Med.Pr. 2014;65(3):317–323

Źródło:

Medycyna Pracy; 2014, 65, 3; 317-323
0465-5893
2353-1339

Pojawia się w:

Medycyna Pracy

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 32.

Tytuł:

Certain properties of continuous fractional wavelet transform on Hardy space and Morrey space

Autorzy:

Verma, Amit K.
Gupta, Bivek

Powiązania:

https://bibliotekanauki.pl/articles/2049016.pdf

Data publikacji:

2021

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

fractional Fourier transform
continuous fractional wavelet transform
Hardy space
Morrey space

Opis:

In this paper we define a new class of continuous fractional wavelet transform (CFrWT) and study its properties in Hardy space and Morrey space. The theory developed generalize and complement some of already existing results.

Źródło:

Opuscula Mathematica; 2021, 41, 5; 701-723
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Assessment of Safety and Health in the Tea Industry of Barak Valley, Assam: A Fuzzy Logic Approach

Autorzy:

Gupta, R.
Dey, S. K.

Powiązania:

https://bibliotekanauki.pl/articles/90279.pdf

Data publikacji:

2013

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

vagueness
fuzziness
safety
fuzzy set
model rozmyty
system bezpieczeństwa
ochrona zdrowia

Opis:

Traditional safety and health system measurement procedures, practiced in various industries produce qualitative results with a degree of uncertainty. This paper presents a fuzzy-logic-based approach to developing a fuzzy model for assessing the safety and health status in the tea industry. For this, the overall safety and health status at a tea estate has been considered as a function of 4 inputs: occupational safety, occupational health, behavioral safety and competency. A set of fuzzy rules based on expert human judgment has been used to correlate different fuzzy inputs and output. Fuzzy set operations are used to calculate the safety and health status of the tea industry. Application of the developed model at a tea estate showed that the safety and health status belongs to the fuzzy class of good with a crisp value of 7.2.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 613-621
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Analysis and settlement evaluation of an end-bearing granular pile with non-linear deformation modulus

Autorzy:

Sharma, J. K.
Gupta, P.

Powiązania:

https://bibliotekanauki.pl/articles/178917.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

end-bearing granular pile
relative stiffness
bearing stratum
granular pile
deformation modulus
settlement influence factor

Opis:

Ground improvement with granular piles increases the load-carrying capacity, reduces the settlement of foundations built on the reinforced ground and is also a good alternative to concrete pile. Granular piles or stone columns are composed of granular material, such as crushed stone or coarse dense sand. An analytical approach based on the continuum approach is presented for the non-linear behaviour of the granular pile. The formulation for pile element displacement is done considering the non-homogeneity of the granular pile as it reflects the true behaviour and also accounts for the changes in the state of the granular pile due to installation, stiffening and improvement effects. The present study shows that the settlement influence factor for an endbearing granular pile decreases with increase in the relative stiffness of the bearing stratum. The settlement influence factor decreases with increase in linear and non-linear non-homogeneity parameters for all values of relative length. For a shorter pile, the rate of decrease of the settlement influence factor is greater in comparison to that for a longer pile. Shear stress at the soil-granular pile interface reduces in the upper compressible portion of the granular pile and increases in the lower stiffer portion of the granular pile due to the non-homogeneity of an endbearing granular pile.

Źródło:

Studia Geotechnica et Mechanica; 2018, 40, 3; 188-201
0137-6365
2083-831X

Pojawia się w:

Studia Geotechnica et Mechanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Optimal LQR controller in CSC based STATCOM using GA and PSO

Autorzy:

Gupta, S.
Tripathi, R. K.

Powiązania:

https://bibliotekanauki.pl/articles/140927.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

CSC
FACTS
AI techniques
LQR
STATCOM

Opis:

The static synchronous compensator (STATCOM) is the multipurpose FACTS device with the multiple input and multiple output system for the enhancement of its dynamic performance in power system. Based on artificial intelligence (AI) optimization technique, a novel controller is proposed for CSC based STATCOM. In this paper, the CSC based STATCOM is controlled by the LQR. But the best constant values for LQR controller's parameters are obtained laboriously through trial and error method, although time consuming. So the goal of this paper is to investigate the ability of AI techniques such as genetic algorithm (GA) and particle swarm optimization (PSO) methods to search the best values of LQR controller's parameters in a very short time with the desired criterion for the test system. Performances of the GA, PSO & ABC based LQR controllers are also compared. Applicability of the proposed scheme is demonstrated through simulation in MATLAB and the simulation results are shown an improvement in the input-output response of CSC-STATCOM.

Źródło:

Archives of Electrical Engineering; 2014, 63, 3; 469-487
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Current glimpse of airborne allergenic pollen in Indian subcontinent
Badania zawartości alergenów pyłkowych w powietrzu na subkontynencie indyjskim

Autorzy:

Ghosal, K.
Gupta-Bhattacharya, S.

Powiązania:

https://bibliotekanauki.pl/articles/28591.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

aeroallergen
pollen
allergic disease
respiratory allergy
bronchial asthma
rhinitis
urticaria
atopic dermatitis
India

Opis:

Respiratory allergic diseases such as bronchial asthma, rhinitis, urticaria, atopic dermatitis have been steadily increasing all over the world, including India. Owing to its alarming trend, several aerobiological surveys have been undertaken in different parts of India to delineate the variety of pollen and spore load. In this review, we have reported the current state of aerobiological knowladge in India with particular reference to allergenic airborn pollen occurence in 2001–2015. Pollen have been found to contribute a significant proportion in the air and caused allergy symptoms in the local inhabitants. Aerobiological records, a questionnaire survey and hospitalization records have been employed for the analysis. Holoptelea integrifolia, Amaranthus spinosus in northern region, Sorghum vulgare, Pennisetum, Gynandropsis gynandra, Parthenium hysterophorus, Dolichandrone platycalyx in southern regions, and Parthenium hysterophorus from the western region; Cynodon dactylon, Cenchrus ciliaris in the central area; Acacia auriculiformis, Cleome gynandra, Catharanthus roseus, Phoenix sylvestris, Areca catechu, and Lantana camara in the eastern regions as potential aeroallergens in India. The statistical approach confirmed the correlation between hospitalization rate associated with allergy-related health troubles and the prevalent allergenic pollen in the air. The Poaceae group has been found to be dominant throughout India. Immuno-biochemical studies identified various protein with allergenic potential found in the pollen recorded. Epitope identification and homology of the major allergenic protein Cat r1 of Catharanthus sp and Par j 1 of Parietaria judaica have been found. Identification of allergenic pollen grains and the modern approach concerning cross-reactivity and epitope revelation of dominant airborne pollen have important clinical implications for the prevention, diagnosis and treatments of allergic diseases in India.
W ostatnich latach na całym świecie drastycznie wzrasta liczba chorób alergicznych układu oddechowego (astma oskrzelowa, nieżyt nosa) oraz pokrzywka czy atopowe zapalenie skóry. Trend wzrostowy występuje również w Indiach, dlatego podjęto badania aerobiologiczne w celu określenia regionalnych różnic zawartości pyłku i zarodników w powietrzu.W artykule przedstawiono obecny stan badań aerobiologicznych prowadzonych w latach 2001–2015 w Indiach, ze szczególnym uwzględnieniem zawartości alergenów pyłkowych. Badania te potwierdzają znaczny udział alergenów pyłkowych w aeroplanktonie. Analizowano również korelację pomiędzy zawartością alergenów pyłkowych w powietrzu a danymi dotyczącymi hospitalizacji pacjentów, u których wystąpiły symptomy alergii. W regionach Indii północnych do alergenów pyłkowych należą Holoptelea integrifolia, Amaranthus spinosus, w regionach południowych Sorghum vulgare, Pennisetum, Gynandropsis gynandra, Parthenium hysterophorus, Dolichandrone platycalyx, w regionach zachodnich Parthenium hysterophorus, na obszarach centralnych Cynodon dactylon, Cenchrus ciliaris, a w regionach wschodnich Acacia auriculiformis, Cleome gynandra, Catharanthus roseus, Phoenix sylvestris, Areca catechu i Lantana camara. W okresie kwitnienia roślin produkujących pyłek alergiczny oraz tuż po tym okresie, wystąpiła znaczna korelacja pomiędzy wskaźnikiem hospitalizacji z powodu problemów zdrowotnych związanych z alergiami oraz zawartością alergenów pyłkowych w powietrzu. Stwierdzono, że pyłek gatunków z rodziny Poaceae jest dominujący na całym obszarze Indii. W badaniach immunobiochemicznych określono alergenny białkowe występujące w pyłku dominujących gatunków. Wykazano istnienie podobnych epitopów oraz homologię głównych białek alergennych, białka Cat r1 pochodzącego z Catharanthus sp. oraz białka Par j 1 pochodzącego z Parietaria judaica. Identyfikacja alergenów pyłkowych, określanie epitopów dominujących ziaren oraz wiedza o możliwej reaktywności krzyżowej alergenów ma istotne znaczenie kliniczne w zakresie zapobiegania, diagnozowania i leczenia chorób alergicznych w Indiach.

Źródło:

Acta Agrobotanica; 2015, 68, 4
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Effects of piezoelectricity on bulk waves in monoclinic poro-elastic materials

Autorzy:

Gupta, V.
Vashishth, A. K.

Powiązania:

https://bibliotekanauki.pl/articles/281774.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

piezoelectricity
porous
monoclinic

Opis:

Piezoelectric materials are materials which produce electric field when stress is applied and get strained when electric field is applied. Piezoelectric materials are acting as very important functional components in sonar projectors, fluid monitors, pulse generators and surface acoustic wave devices. Wave propagation in porous piezoelectric material having crystal symmetry 2 is studied analytically. The Christoffel equation is derived. The phase velocities of propagation of all these waves are described in terms of complex wave velocities. The effects of phase direction, porosity, wave frequency and piezoelectric interaction on the phase velocities are studied numerically for a particular model.

Źródło:

Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 571-577
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Schauder decompositions in dual and bidual spaces

Autorzy:

Gupta, M.
Kamthan, P. K.
Ray, S. K.

Powiązania:

https://bibliotekanauki.pl/articles/724929.pdf

Data publikacji:

1976

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Źródło:

Colloquium Mathematicum; 1976, 36, 1; 109-115
0010-1354

Pojawia się w:

Colloquium Mathematicum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Perception of dental practitioners regarding the use of antioxidants in oral health

Autorzy:

Randhawa, R.K.
Gupta, N.
Bansal, M.
Arora, V.
Gupta, P.
Thakar, S.

Powiązania:

https://bibliotekanauki.pl/articles/875829.pdf

Data publikacji:

2016

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

perception
dental health
antioxidant
free radical
mouth cancer
oral health

Opis:

Background. Free radicals play a key role in the development of several pathological conditions. Therefore, antioxidants (AOs) are the first line of defense against free radical damage and are critical for maintaining optimum health and wellbeing. Objectives: To assess the perception of dental practitioners regarding use of antioxidants in oral health. Method. A cross-sectional questionnaire study was conducted among 296 dental practitioners in Tricity (Chandigarh, Mohali, Panchkula, India). A self-structured close-ended questionnaire was used to assess the perception of dentists regarding the use of antioxidants in their patients. It consisted of 12 questions with dichotomous response and five point likert scale ranging from strongly agree to strongly disagree. Descriptive statistics were used to summarize the data, followed by the Chi-square test to check significant differences between the responses. Correlation between responses were analysed through the Spearman’s rank correlation. Statistical analysis was done using Statistical Package for Social Sciences version 20 (Illinois, Chicago, USA). Results. A statistically significant difference was observed between genders, with females 181 (61%) having more knowledge than males 115 (39%) regarding the use of antioxidants in their clinical practice. It has been found that dental professionals in academics prescribes more antioxidants to their patients than the private practitioners. Postgraduates 76 (77.6%) had a higher level of knowledge than graduates 86 (43%). Conclusions. Knowledge about antioxidants should be highlighted in the health sciences curriculum. It is recommended to expand the use of antioxidants in oral health to bring down the burden of chronic diseases like periodontitis and catastrophic diseases like precancerous lesions and oral cancer.

Źródło:

Roczniki Państwowego Zakładu Higieny; 2016, 67, 3
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Using Anthropogenic Waste (Steel Slag) to Enhance Mechanical and Wear Properties of a Commercial Aluminium Alloy A356

Autorzy:

Sridhar Raja, K. S.
Bupesh Raja, V. K.
Gupta, Manoj

Powiązania:

https://bibliotekanauki.pl/articles/353592.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

A356
steel slag
wear resistance
tensile strength
industrial waste
environmental hazard

Opis:

The present study addresses the utilization of induction furnace steel slag which is an anthropogenic waste, for enhancing the mechanical properties of a commercial aluminium alloy A356. Different weight percentage (3wt%, 6wt%, 9wt%, and 12wt%) of steel slag particles in 1 to 10 μm size range were used as reinforcing particles in aluminium alloy A356 matrix. The composites were prepared through stir casting technique. The results revealed an improvement in mechanical properties (i.e. microhardness and tensile strength) and wear resistance with an increase in weight percentage of the steel slag particles. This research work shows promising results for the utilization of the steel slag for enhancing the properties of aluminium alloy A356 at no additional cost while assisting at same time in alleviating land pollution.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 1; 279-284
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Effects of inertia in the steady state pressurised flow of a non-Newtonian fluid between two curvilinear surfaces of revolution: Rabinowitsch fluid model

Autorzy:

Singh, U. P.
Gupta, R.S.
Kapur, V.K.

Powiązania:

https://bibliotekanauki.pl/articles/185617.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

efekt bezwładności
łożysko krzywoliniowe
zewnętrzny przepływ ciśnieniowy
curvilinear bearings
Rabinowitsch fluid model
inertia effect
externally pressurized flow

Opis:

In many practical situations fluids are normally blended with additives (viscosity index improvers, viscosity thickeners, viscosity thinners) due to which they show pseudoplastic and dilatant nature which can be modelled as cubic stress model (Rabinowitsch model). The cubic stress model for pseudoplastic fluids is adopted because Wada and Hayashi have shown that the theoretical results with this model are in good agreement with the experimental results. The present theoretical analysis is to investigate the pseudoplastic effect along with the effect of rotational inertia on the pressure distribution, frictional torque and fluid flow rate of externally pressurised flow in narrow clearance between two curvilinear surfaces of revolution. The expression for pressure has been derived using energy integral approach. To analyse and discuss the effects of pseudoplasticity and fluid inertia on the pressure distribution, fluid flow rate and frictional torque, the examples of externally pressurised flow in the clearance between parallel disks and concentric spherical surfaces have been considered.

Źródło:

Chemical and Process Engineering; 2011, 32, 4; 333-349
0208-6425
2300-1925

Pojawia się w:

Chemical and Process Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Maximizing hybrid seedlings recovery and early identification of highly polyembryonic acid lime (Citrus aurantifolia Swing.) × lemon (Citrus limon Burm.) hybrids using SSR markers

Autorzy:

Dubey, A.K.
Gupta, A.
Sharma, R.M.
Sharma, N.

Powiązania:

https://bibliotekanauki.pl/articles/1077768.pdf

Data publikacji:

2020

Wydawca:

Instytut Ogrodnictwa

Tematy:

hybrid seed
germination
seedling
Citrus aurantifolia
citrus fruit
citrus bacterial canker
Xanthomonas axonopodis pv. citri
SSR marker

Opis:

Nucellar embryony is the major obstacle in getting hybrid seedlings in interspecific crosses in citrus. Hence, the present study was conducted to standardize embryo age, culture media for maximizing germination, and subsequent identification of simple sequence repeat (SSR) markers to differentiate the hybrids. A factorial experiment was conducted with three embryo ages – 80–90, 110–120, and 130–140 days after pollination (DAP). The germination of the rescued immature embryos of acid lime × lemon crosses was initiated on three different growing media. The fruits harvested at 130–140 and 80–90 DAP had a higher number of functional seeds (90%). Older embryos (130–140 DAP) and middle-aged embryos (110–120 DAP) germinated in 100% on Murashige and Skoog (MS) medium supplemented with 500 mg·l -1 malt extract, 1.5 mg·l-1 gibberellic acid (GA3), and 0.02 mg·l-1 naphthalene acetic acid (NAA). MS medium supplemented with 500 mg·l-1 malt extract proved better for the germination of embryos taken at 80–90 DAP. Plantlet survival was the highest in younger embryos (80–90 DAP) cultured on MS basal medium (84.21%) and the lowest in older embryos cultured on MS medium supplemented with 500 mg·l-1 malt extract plus 1.5 mg·l-1 GA3 and 0.02 mg·l-1 NAA. The seedlings obtained from the culture 80–90 DAP had the highest root length (4.9 mm) and shoot length (5.3 mm) at 60 days after inoculation (DAI) on the above medium. SSR marker analysis revealed that CCSM-4 and CAC-33 markers expressed polymorphism between female and male parents, proving their ability to identify the hybrids of ‘Kagzi’ acid lime × ‘Konkan Seedless’ lemon.

Źródło:

Journal of Horticultural Research; 2020, 28, 2; 43-52
2300-5009

Pojawia się w:

Journal of Horticultural Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Thermoacoustical Excess Properties of Binary Liquid Mixtures - A Comparative Experimental and Theoretical Study

Autorzy:

Yasmin, M.
Singh, K.
Parveen, S.
Gupta, M.
Shukla, J.

Powiązania:

https://bibliotekanauki.pl/articles/1808024.pdf

Data publikacji:

2009-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

43.35.+d
62.60.+v
82.60.Lf

Opis:

Specific heat ratio (γ), pseudo-Grüneisen parameter (Γ), heat capacity $(C_p)$ and effective Debye temperature $(θ_{D})$ for binary system of tetrahydrofuran with o-cresol and methanol respectively, were calculated using the experimentally measured densities, velocities and viscosities of the pure liquids and their mixtures over the whole composition range and at T = 293, 303, 313 K. The excess pseudo-Grüneisen parameter $(Γ ^{E})$, excess molar isentropic compressibility $(K_{s}^{E})$ and excess acoustic impedance $(Z^{E})$ were also calculated. The excess deviation functions have been correlated using Redlich-Kister polynomial equation. The observed values of the excess parameters plotted against the mole fraction of tetrahydrofuran have been explained on the basis of intermolecular interaction suggesting strong interaction in tetrahydrofuran + o-cresol than in tetrahydrofuran + methanol. Partial molar isentropic compressibility at infinite dilution and their excess values were calculated for each component. Sanchez theory, Goldsach-Sarvas volume fraction statistics, Sudgen's relation, Flory-Patterson-Rastogi and Brock and Bird model were used with the Aurebach relation to compute theoretically the values of ultrasonic velocities at varying temperatures. The velocity deviations were estimated in terms of average percentage deviations. Internal pressure for both the systems were calculated theoretically and discussed on the basis of relative applicability of the models in theoretical estimations. The isothermal compressibility $(k_T)$, for these binary mixtures were theoretically evaluated by using the Flory statistical theory and five hard sphere models and compared with the experimental values.

Źródło:

Acta Physica Polonica A; 2009, 115, 5; 890-900
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

A Study on Creep Behavior of Composite Solid Propellants Using the Kelvin-Voigt Model

Autorzy:

Bihari, B. K.
Rao, N. P. N.
Gupta, M.
Murthy, K. P. S.

Powiązania:

https://bibliotekanauki.pl/articles/358395.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

mechanical properties
viscoelasticity
propellant
creep
DMA

Opis:

A Kelvin-Voigt model consisting of a spring and a dashpot in parallel was applied for the viscoelastic characterization of solid rocket propellants. Suitable values of spring constants and damping coefficients were employed by a least squares fit of the errors to generate creep curves using a Dynamic Mechanical Analyzer (DMA) for composite solid propellants. Three different composite propellant formulations based on HTPB/AP/Al having burning rates of 5 mm/s, 15 mm/s and 20 mm/s were tested under different stress levels varying from 0.1 MPa to 3 MPa and at different temperatures varying from 35 °C to 85 °C. Creep behavior with recovery was studied and analyzed to evaluate the viscoelastic properties. The change in spring constants, representing elastic deformation, was very small compared to the damping coefficients for the propellants studied. For a typical propellant formulation, when the stress level was increased, the spring and damping coefficient both increased significantly whereas for an increase in temperature, they remained nearly constant. However, the ratio E/η was observed to be constant and independent of stress level. It was also observed that the variation of E and η varied linearly with increase in stress whereas their ratio showed a logarithmic variation. A mathematical correlation was developed to evaluate the viscoelastic properties during creep of composite propellants.

Źródło:

Central European Journal of Energetic Materials; 2017, 14, 3; 742-756
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Automated credibility assessment on twitter

Autorzy:

Lorek, K.
Suehiro-Wiciński, J.
Jankowski-Lorek, M.
Gupta, A.

Powiązania:

https://bibliotekanauki.pl/articles/952935.pdf

Data publikacji:

2015

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Twitter
credibility
machine learning algorithms

Opis:

In this paper, we make a practical approach to automated credibility assessment on Twitter. We describe the process behind the design of an automated classifier for information credibility assessment. As an addition, we propose practical implementation of TwitterBOT, a tool which is able to score submitted tweets while working in the native Twitter interface.

Źródło:

Computer Science; 2015, 16 (2); 157-168
1508-2806
2300-7036

Pojawia się w:

Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Enhancement in bath mixing and plume area in a new degassing process - a computational fluid dynamic study
Zwiększenie mieszania kąpieli i obszaru mieszania w nowym procesie odgazowania - badania obliczeniowej dynamiki płynów

Autorzy:

Mondal, M. K.
Maruoka, N.
Kitamura, S.
Gupta, G. S.

Powiązania:

https://bibliotekanauki.pl/articles/353329.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

REDA
stal niskowęglowa
CFD
odwęglanie
decarburization
ultra low carbon steel

Opis:

Reaction between the various species in slag and metal phase is usually mass transfer controlled. There have been continuous efforts to increase the reaction efficiency in slag-metal system, especially during decarburization of steel to produce the ultra low carbon steel (ULCS) in secondary steelmaking. It has been found that the surface reaction is a dominant factor in the final stage of decarburization. In the initial stage, the inner site reaction is major factor in the refining process. The mixing of bath affects the later reaction. However, the former reaction (surface reaction) is affected by the plume size area at the top of the metal surface. Therefore, a computational study has been made to understand the fluid dynamics of a new secondary steelmaking process called Revolutionary Degasser Activator (REDA) to study the bath mixing and plume area. REDA process has been considered as it is claimed that this process can reduce the carbon content in steel below 10ppm in a less time than the other existing processes such as RH and Tank degasser. This study shows that both bath mixing and plume area are increased in REDA process facilitating it to give the desired carbon content in less time. Qualitative comments are made on slag-metal reaction system based on this finding.
Reakcja pomiędzy różnymi składnikami w fazie żużlowej i metalowej jest zwykle kontrolowana przez transport masy. Ciągle dążono do zwiększenia wydajności reakcji w układzie metal-żużel, zwłaszcza podczas procesu odwęglania, przy produkcji stali o ultra niskiej zawartości węgla (ULCS) podczas obróbki pozapieciowej. Stwierdzono, że reakcja na powierzchni jest czynnikiem dominującym w końcowej fazie odwęglenia. W początkowym etapie, reakcja wewnątrz jest głównym czynnikiem w procesie rafinacji. Mieszanie kąpieli wpływa na późniejszą reakcję. Jednakże na poprzednią reakcję (reakcja na powierzchni) ma wpływ wielkość obszaru mieszania na powierzchni metalu. W związku z tym dokonano obliczeń, w celu zrozumienia dynamiki płynów nowego procesu metalurgii pozapiecowej, nazwanego Rewolucyjny Aktywator Odgazowania (REDA), do badania mieszania kąpieli i obszaru mieszania. Twierdzi się że proces REDA może zmniejszyć zawartość węgla w stali poniżej 10 ppm w krótszym czasie, niż inne istniejące procesy takie jak RH i odgazowanie w kadzi. Z niniejszych badań wynika, że zarówno mieszanie kąpieli i obszar mieszania zwiększa się w procesie REDA, ułatwiając uzyskanie żądanej zawartość węgla w krótszym czasie. Poczynione są jakościowe uwagi na temat reakcji w układzie żużel-metal, oparte na tych wynikach.

Źródło:

Archives of Metallurgy and Materials; 2010, 55, 4; 1131-1135
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Endodontic treatment of immature tooth - a challenge

Autorzy:

Gupta, S.
Sodhi, S.P..
Brar, G.K.
Bansal, R.N.

Powiązania:

https://bibliotekanauki.pl/articles/2097446.pdf

Data publikacji:

2020

Wydawca:

Instytut Medycyny Wsi

Tematy:

mmature tooth
root apex
endodontic treatment
open apex
MTA
regenerative endodontics

Opis:

Root apex is an area of primary importance for an endodontist. When a tooth erupts in the oral cavity the apical foramen undergoes anatomical changes with age. Root development is completed and the root apex is closed three years after eruption of the tooth. Endodontic practice is influenced to a great extent by different stages of root development and the type of tissue present within the roots. Open apices pose a challenging problem for the success of root canal treatment because they favour the extravasation of the irrigating solution and/or sealer into periradicular tissues, thus jeopardizing apical healing. Regenerative endodontics (revascularization/pulpal regeneration) is a straightforward approach accomplished with currently available instruments and materials. A literature review suggests that Mineral Tri oxide Aggregate (MTA) is the most favourable and recommendable material for single-visit apexification, even in cases when regenerative endodontics cannot be performed. A plus point of MTA is its biocompatibility and hermetic apical seal with no micro-leakage. It should be considered as an effective alternate for treating immature teeth with necrotic pulps. Treatment of a tooth with open apex poses multiple challenges. However, it is not easy to decide which material should be used: Calcium hydroxide, Mineral Tri oxide Aggregate, Biodentine, Platlet Rich Fibrin (PRF), or White Portland Cement (WPC). The choice of treatment regimen depends on several factors, e.g. individual cases, experience of the operator, familiarity with handling various materials, and patient’s availability for follow-up appointments. This review highlights various challenges in the treatment of open apex, with emphasis on MTA compared with other materials.

Źródło:

Journal of Pre-Clinical and Clinical Research; 2020, 14, 3; 73-79
1898-2395

Pojawia się w:

Journal of Pre-Clinical and Clinical Research

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Molecular Interaction Study of Binary Mixtures of THF with Methanol and o-Cresol - an Optical and Ultrasonic Study

Autorzy:

Parveen, S.
Singh, S.
Shukla, D.
Singh, K.
Gupta, M.
Shukla, J.

Powiązania:

https://bibliotekanauki.pl/articles/1585019.pdf

Data publikacji:

2009-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

43.35.+d
62.60.+v
82.60.Lf

Opis:

The refractive indices, densities and ultrasonic velocities of binary liquid mixtures of tetrahydrofuran (THF) with methanol and o-cresol over the entire composition range have been measured at 293, 303 and 313 K. Refractive index, density and ultrasonic velocity data have been used to evaluate the molar refraction deviation $ΔR_{m}$, deviation in ultrasonic velocity Δu, excess internal pressure $π_{i}^{E}$, excess molar enthalpy $H_{m}^{E}$ and excess free volume $V_{f}^{E}$. The computed results of $ΔR_{m}$, Δu, $π_{i}^{E}$, $H_{m}^{E}$ and $V_{f}^{E}$ were fitted to the Redlich-Kister polynomial equation. These results suggest that specific strong interactions are taking place in THF + o-cresol mixture while dispersive forces seem to be responsible for behaviour of THF + methanol mixture. Further, experimental refractive index and density data of these mixtures were also used to test the validity of the empirical/semi-empirical relations and models for refractive index and density, respectively.

Źródło:

Acta Physica Polonica A; 2009, 116, 6; 1011-1017
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Lactoferrin gene promoter variants and their association with clinical and subclinical mastitis in indigenous and crossbred cattle

Autorzy:

Chopra, A.
Gupta, I.D.
Verma, A.
Chakravarty, A.K.
Vohra, V.

Powiązania:

https://bibliotekanauki.pl/articles/31066.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Opis:

Lactoferrin (Lf) gene promoter was screened for the presence of single nucleotide polymphism in indigenous and crossbred cattle from North India and to evaluate its association with Mastitis. Study revealed the presence of genetic variation in regulatory region of bovine Lactoferrin gene using PCR-RFLP technique. Three genotypes namely GG, GH and HH were identified. A single nucleotide change, from guanine to adenine at 25th position was found to be significantly associated (p<0.05) with clinical mastitis in indigenous Sahiwal and crossbred Karan Fries cattle maintained at organised herd of National Dairy Research Institute, Karnal. A non-significant association was observed between subclinical mastitis, somatic cell score (SCS), and GG genotype in Karan Fries cattle, however, a lower SCS was observed in animals having GG genotype. Overall a lower incidence of clinical mastitis was recorded in those animals having GG genotype of Lf in Sahiwal and Karan Fries (KF) cattle. The SNP identified in the promoter region may effect expression lactoferrin protein, which may lead to different levels of antibacterial and anti- nflammatory activity of Lf gene. Results from this study indicated the probable role played by Lactoferrin promoter to serve as candidate gene for mastitis susceptibility among indigenous and crossbred milch cattle.

Źródło:

Polish Journal of Veterinary Sciences; 2015, 18, 3
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Easy-Plane Magnetic Anisotropy Induced by Stress-Annealing in Finemet-Type Materials

Autorzy:

Lachowicz, H. K.
Kane, S. N.
Gupta, A.
Gierlotka, S.
Pałosz, B.

Powiązania:

https://bibliotekanauki.pl/articles/1968937.pdf

Data publikacji:

1998-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.30.Gw
75.50.Kj
75.60.Ch

Opis:

It is shown that annealing under stress of FINEMET-type metallic glass ribbon (FeCuNbSiB) induces magnetic anisotropy of an easy-plane type (cross-section of the ribbon). This conclusion has been drawn analyzing experimental results obtained by means of Kerr-effect (domain structure) and Mössbauer spectroscopy operating in the so-called "magic angle" configuration which allows us to calculate all three spatial components of magnetization. Additionally, it is also shown that no crystallographic texture is created in the sample after stress-annealing, the feature which would have been an origin of the observed anisotropy.

Źródło:

Acta Physica Polonica A; 1998, 93, 5-6; 799-804
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

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