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    Wyświetlanie 1-11 z 11
    Tytuł:
    Application of AERMOD model in air quality (PM10) impact assessment of selected opencast mines in The Jharia Coalfield, Jharkhand, India
    Autorzy:
    Kundu, S.
    Pal, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/207806.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    PM10
    pollution
    opencast mines
    emission factors
    zanieczyszczenie
    kopalnia odkrywkowa
    wskaźnik emisji
    Opis:
    The study mainly delineates the application of AERMOD to evaluate PM10 concentrations for the selected opencast mines in The Jharia coalfield. AERMOD estimated PM10 concentration profiles were developed on the basis of evaluated emission rates of salient coal mining activities. While comparing these estimated values with monitored values of PM10, the evaluated indices of agreement were found to be 0.86, 0.84 and 0.88 during winter and 0.94, 0.68 and 0.87 during summer for the Katrasgarh, Muraidih and Rajapur opencast mines, respectively. In a like manner, performance evaluation of AERMOD evaluated concentrations over actual field concentration using a set of five statistical tools, indicated more or less fairly good prediction for both the seasons. Further, USEPA AP-42 based emission factor data for more or less identical mining activities were also used for AERMOD run in order to evaluate PM10 profiles. Correlation analysis indicated 71–89% and 62–85% model accuracy for winter and summer, respectively.
    Źródło:
    Environment Protection Engineering; 2018, 44, 4; 5-21
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new circuit topology using Z-source resonant inverter for high power contactless power transfer applications
    Autorzy:
    Ghosh, P. C.
    Sadhu, P. K.
    Ghosh, A.
    Pal, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/141006.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    contactless power transfer
    mutual inductance
    magnetic coupling coefficient
    Z-source
    resonant inverter
    Opis:
    In this study, a new circuit topology using a Z-source resonant inverter (ZSRI) for high power applications in large-air-gap contactless power transfer (CPT) systems, has been investigated. The main shortcoming of a large-air-gap CPT system is the poor power transfer efficiency due to low magnetic coupling. In order to minimize this shortcoming and to improve the overall performance of the system by boosting the power transfer capability, in this paper a CPT system with the newly developed circuit topology using high frequency Z-source resonant inverter has been proposed. Using the newly developed circuit topology for the CPT system, it has been observed that the overall performance of the system has been improved to a reasonable level with a purely sinusoidal resonant current flowing through the primary side. Therefore, no harmonics will be injected into the source. The proposed CPT system with an air gap of 16 cm and a misalignment of 3 cm has been simulated using the Maxwell finite element tool and Simplorer circuit simulation software for an output power of 2 kW.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 4; 843-854
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil temperature prediction from air temperature for alluvial soils in lower Indo-Gangetic plain
    Autorzy:
    Barman, D.
    Kundu, D.K.
    Pal, S.
    Chakraborty, A.K.
    Jha, A.K.
    Mazumdar, S.P.
    Saha, R.
    Bhattacharyya, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/25358.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Soil temperature is an important factor in biogeochemical processes. On-site monitoring of soil temperature is limited in spatio-temporal scale as compared to air temperature data inventories due to various management difficulties. Therefore, empirical models were developed by taking 30-year long-term (1985-2014) air and soil temperature data for prediction of soil temperatures at three depths (5, 15, 30 cm) in morning (0636 Indian standard time) and afternoon (1336 Indian standard time) for alluvial soils in lower Indo-Gangetic plain. At 5 cm depth, power and exponential regression models were best fitted for daily data in morning and afternoon, respectively, but it was reverse at 15 cm. However, at 30 cm, exponential models were best fitted for both the times. Regression analysis revealed that in morning for all three depths and in afternoon for 30 cm depth, soil temperatures (daily, weekly, and monthly) could be predicted more efficiently with the help of corresponding mean air temperature than that of maximum and minimum. However, in afternoon, prediction of soil temperature at 5 and 15 cm depths were more precised for all the time intervals when maximum air temperature was used, except for weekly soil temperature at 15 cm, where the use of mean air temperature gave better prediction.
    Źródło:
    International Agrophysics; 2017, 31, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A closed-loop power controller model of series-resonant-inverter-fitted induction heating system
    Autorzy:
    Pal, P.
    Roy, D.
    Datta, A.
    Sadhu, P. K.
    Banerjee, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/141721.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    induction heating
    power controller
    PID
    series resonant inverter
    MATLAB
    Opis:
    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.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 4; 827-841
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel circuit topology of modified switched boost hybrid resonant inverter fitted induction heating equipment
    Autorzy:
    Bhattacharya, A.
    Sit, K.
    Sadhu, P. K.
    Pal, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/140770.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modified switched boost
    high frequency
    hybrid resonant inverter
    induction heating
    controllability
    VSI and PSIM
    Opis:
    A novel circuit topology of modified switched boost high frequency hybrid resonant inverter fitted induction heating equipment is presented in this paper for efficient induction heating. Recently, induction heating technique is becoming very popular for both domestic and industrial purposes because of its high energy efficiency and controllability. Generally in induction heating, a high frequency alternating magnetic field is required to induce the eddy currents in the work piece. High frequency resonant inverters are incorporated in induction heating equipment which produce a high frequency alternating magnetic field surrounding the coil. Previously this high frequency alternating magnetic field was produced by voltage source inverters. But VSIs have several demerits. So, in this paper, a new scheme of modified switched boost high frequency hybrid resonant inverter fitted induction heating equipment has been depicted which enhances the energy efficiency and controllability and the same is validated by PSIM.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 4; 815-826
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Status and Scope of the Jute Industry in India in Comparison to other World Producers
    Analiza produkcji włókien z juty i wyrobów jutowych w Indiach w porównaniu do innych producentów światowych
    Autorzy:
    Bag, S. N.
    Kumar, U. C.
    Pal, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/234020.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    twill
    bags
    hessian
    jute goods
    sacking
    diagonal
    torby
    włókno jutowe
    wyroby z juty
    worki jutowe
    Opis:
    India is the leading producer of raw jute and jute products in the world. India’s sacking goods production comprises 75% of the total goods production and B twill bags, used for packaging rice and wheat, and contributes 85% of the total sacking bag production. Still there exists an increasing trend of imports of jute products due to the increase in the domestic consumption of conventional jute goods. Bangladesh is the major exporter in jute goods, with India in 2nd position. Hessian cloth and bags are the major exporting items of jute goods from India. In the overall situation, there exists a unique opportunity of the jute industry to improve the social and economic conditions of the states concerned as well as the country. Being the preferred sector in raw jute production due to suitable topographical conditions, emphasis now needs to be placed on modernization of the jute sector with a view to developing a viable and efficient jute manufacturing sector in the country.
    Indie są wiodącym producentem włókien jutowych i produktów z juty. Indie produkują 75%-85% światowej produkcji worków opakunkowych. Istnieje wzrastający trend zużycia worków jutowych w związku ze zwiększającym się zapotrzebowaniem krajowym. Drugie miejsce w produkcji wyrobów jutowych zajmuje Bangladesz. Istnieją korzystne warunki do dalszej poprawy rozwoju przemysłu juty, w tym zwiększenie modernizacji i wydajności przemysłu.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2016, 6 (120); 19-25
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    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
    Artykuł
    Tytuł:
    Erythrocyte functional status and lipid profile of coal mine workers of West Bengal, India
    Autorzy:
    Prasad, S.K.
    Bhattacharjee, A.
    Bandyopadhyay, P.
    Pal, S.
    Syamal, A.K.
    Mukherjee, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1916566.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Coal miners
    antioxidant insufficiency
    blood lipid profiles
    erythrocyte osmotic fragility
    oxidative stress
    Opis:
    Purpose: Despite people suffering from several forms of ill health, constant exposure to toxic wastes and chronic diseases as a result of mining, there is a tragic gap in the availability of ‘scientific’ studies and data on the health hazards of mining in India. This study was proposed to understand better the relationship between occupational exposure to coal, blood lipid profiles and red blood cell (RBC) functional status of coal workers. Materials and methods: Blood samples were obtained from coal miners (n=32) of an underground mine in West Bengal. Blood lipid profiles and RBC functional status were determined. Students’ t-test and Pearson correlation analyses were completed to analyze the data. Results: Compared to the control subjects, significantly higher levels of cholesterol (p<0.01), triglycerides (p<0.01), LDL (p<0.001), and VLDL (p<0.001) were observed in coal miners. HDL, Hb, Na+-K+ATPase and SOD activity were significantly (p<0.001) lower in coal miners, whereas MDA levels (p<0.001) and osmotic fragility in coal miners were increased significantly (p<0.01). Conclusions: Our study indicates that elevated MDA and antioxidant insufficiency caused disruption in the structural integrity of erythrocyte, which may be a pathophysiological mechanism in the progression of disease in coal miners. Also, cardiovascular disease risk factors were more prevalent in the coal miners.
    Źródło:
    Progress in Health Sciences; 2014, 4, 2; 14-21
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postural Stability of Sitting Women
    Autorzy:
    Nag, P. K.
    Vyas, H.
    Nag, A.
    Pal, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/90231.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    woman
    chair sitting
    postural stabilometry
    kobieta
    krzesło
    stabilność postawy
    Opis:
    The study examined the utility of stabilometric dimensions and explored whether the changes in sitting postures were manifested in functional measures of postural control. Eleven women participated in the study, which used 11 chair sitting postures: arms on laps or arms right angled; armrest at a height of 17, 20 and 23 cm; with or without backrest; slouch or straight back; legs right angled at knees or crossed legs. The backrest and armrest shifted 16.3% of body weight from a seat pan. The characteristics of stabilometric dimensions evaluated the influence of seat components and sitting behaviour on postural balance. The study attempted to evaluate stability and its application in human–seat interface design.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 583-595
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Positronium Trapping in Porous Solids: Means and Limitations for Structural Studies
    Autorzy:
    Kajcsos, Zs.
    Liszkay, L.
    Duplâtre, G.
    Varga, L.
    Lohonyai, L.
    Pászti, F.
    Szilágyi, E.
    Lázár, K.
    Kótai, E.
    Pál-Borbély, G.
    Beyer, H. K.
    Caullet, P.
    Patarin, J.
    Azenha, M. E.
    Gordo, P. M.
    Lopes Gil, C.
    de Lima, A. P.
    Ferreira Marques, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2042216.pdf
    Data publikacji:
    2005-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.10.Dr
    78.70.Bj
    61.43.Gt
    Opis:
    Positron annihilation techniques are used for the structural investigation of solids but the interpretation of results in grainy and porous media is still unclear. A unique picture can be obtained assuming that the dominant process is Ps trapping in competing "extended free volume" sites. In samples with a large amount of free volumes near-saturation Ps trapping will rule the lifetime pattern, and very long lifetimes of over 100 ns might arise from o-Ps trapped in mesopores. It is shown that lifetime parameters must be corrected for the 3γ/2γ counting efficiency ratio. The results demonstrate the high sensitivity of Ps to mesopores in zeolites but also that Ps-trapping poses limitations on the applicability of lifetime to structural investigation in porous systems. The evolution of the lifetime spectra upon changes in the sample and measuring conditions should be considered in a complex way, observing not only changes in some selected components but in the whole lifetime pattern simultaneously.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 5; 729-737
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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