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Wyświetlanie 1-100 z 3620
Tytuł:
Prasa francuska o Biurze historycznem Polskiego Sztabu Gen.
Prasa francuska o Biurze historycznem Polskiego Sztabu Generalnego
Autorzy:
S.R.
Powiązania:
Polska Zbrojna 1923, nr 15, s. 4
Data publikacji:
1923
Tematy:
Kukiel, Marian (1885-1973)
Sztab Generalny Wojska Polskiego
Czasopisma francuskie 1918-1939 r.
Opis:
Na marginesie art. "Le Bureau Historique de l'Etat-Major general polonais" zamieszcz. w "France Militaire". - 1922, 22 XII.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Kapitał ludzki, podział pracy i konkurencyjność
Human Capital, Division of Labour and Competitiveness
Autorzy:
Domański, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/575087.pdf
Data publikacji:
2000-07-25
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2000, 161, 7-8; 32-46
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geology and mining of selected energy resources in China
Autorzy:
Ćmiel, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/294293.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
China
geology
mining
energy resources
Opis:
The article presents geological and economic characteristics of energy resources and their mining in China. Coal basins are associated with the Palaeozoic and Mesozoic fold structures connecting crystalline massifs of the Chinese Platform. In China four coal-bearing regions are delimited: the most important economically central region (Shanxi and Ordos Basin) as well as eastern, south-western and western (Xingjian). In terms of coal resources, China ranks third, and in terms of the extraction – first in the world, producing approx. 3.65 billion t a–1. In the twenty-first century Chinese mining industry has undergone restructuring involving the liquidation of small, technologically backward mines with poor safety and profitability record. The most important onshore oil and gas basins occur in Daqing, Shengli, Nanyang, Renqiu, Karamay, Dagang and Yumen, while offshore basins are in the Yellow Sea and South China Sea. In terms of crude oil consumption and import China takes the first place in the world. Natural gas plays a relatively small role in energy production. China has the largest shale gas reserves in the world (36 trillion m3) and it is intensively preparing for their extraction.
Źródło:
Landform Analysis; 2016, 32; 3-8
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cluster sets of analytic multivalued functions
Autorzy:
Harbottle, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/1293315.pdf
Data publikacji:
1992
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
Classical theorems about the cluster sets of holomorphic functions on the unit disc are extended to the more general setting of analytic multivalued functions, and examples are given to show that these extensions cannot be improved.
Źródło:
Studia Mathematica; 1991-1992, 101, 3; 253-267
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oszczędzać życie ludzkie oszczędzając jednocześnie pieniądze : od szpitala polowego czasu wojny koreańskiej do opieki medycznej na miarę przyszłego wieku
Autorzy:
Gourley, S. R.
Powiązania:
Wybrane Informacje Tematyczne Centralny Ośrodek Naukowej Informacji Wojskowej, 1996, nr 1, s. 1-4
Współwytwórcy:
Karpowicz, Zdzisław. Opracowanie
Data publikacji:
1996
Tematy:
Medycyna wojskowa technika Stany Zjednoczone
Opis:
Oprac. art. zamieszcz. w "International Defense Review". --- 1995, nr 8, s. 45-48.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Modelling flow in the porous bottom of the Barents Sea shelf
Autorzy:
Massel, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/48663.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
porous medium
surface wave
tide
Barents Sea
shelf
organic carbon
water transport
water flow
meteorological condition
Źródło:
Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the geometry of ocean surface waves
Autorzy:
Massel, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/48766.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
air-sea interaction
atmosphere-ocean interaction
deep water
dynamic factor
geometry
irregular wave
marine environment
ocean surface
regular wave
shallow water
surface wave
water motion
wave breaking
wave slope
Opis:
The factors influencing the atmosphere-ocean transfer of mass and momentum, as well as incipient wave breaking and the amount of energy dissipated due to breaking, are discussed in detail. In particular, the influence of directional spreading on the statistics of surface wave slopes and the area of the wind- roughened ocean surface is demonstrated. Theoretical analysis and comparison with the available experimental data show that unimodal directional spreading is not able to reproduce the observed ratio of the cross-wind/up-wind mean square slopes. Better agreement is achieved when bimodal directional spreading, consisting of two wrapped-Gaussian distributions, is applied. The bimodal form suggested by Ewans (1998) is used in the paper. Moreover, the formulae developed here show that the increase in the area due to surface waves is rather small for both regular and irregular waves.
Źródło:
Oceanologia; 2011, 53, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface waves in deep and shallow waters
Autorzy:
Massel, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/48826.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
surface wave
deep
shallow water
dynamic factor
marine environment
atmosphere-ocean interaction
ocean form
air-sea interface
hydrodynamics
Opis:
The motion of water due to surface waves is the most dynamic factor observed in the marine environment. In this review various aspects of the wave modelling of non-linear, steep surface waves and their role in the atmosphere-ocean interaction are discussed. Significant improvements in wave forecasting have been made in the last ten years. This is to a large extent related to substantial progress in the description of wind forcing and other processes, as well as to the more efficient use of satellite observations and assimilation methods. One striking observation is the increasing variety and complexity of models in which more physical processes are implemented, greater precision and resolution achieved and extended ranges of applicability demonstrated. However, in order to evaluate the applicability of particular models, comparison with high quality experimental data, collected in nature or under laboratory conditions, is necessary.
Źródło:
Oceanologia; 2010, 52, 1; 5-52
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Circulation of groundwater due to wave set-up on a permeable beach
Autorzy:
Massel, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/48887.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
groundwater circulation
water flow
filtration
surface wave
sandy beach
mathematical modelling
Opis:
Sandy beaches are highly exploited but very dynamic and fragile environments. Driven by waves, the water flow through the beach body is able to transport oxygen, and hence help to maintain biological activity in the porous media. The paper presents a theoretical attempt to predict the groundwater circulation due to wave set-up. Two systems of circulations have been discovered, related to two different gradients of the set-up height. For the offshore gradient, the horizontal excess pressure gradient induces flow in the offshore direction. However, closer to the shore, the pressure gradient is reversed and the resulting flow moves shorewards.
Źródło:
Oceanologia; 2001, 43, 3; 279-290
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected parameters of coal quality in fault zones of the Upper Silesian Coal Basin (Poland)
Autorzy:
Ćmiel, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/1204911.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fault zones
coal quality parameters
Upper Silesian Coal Basin
Opis:
The paper presents the changes of coal seams quality near fault zones. Three types of relations have been found. The first one shows an increase of coal quality at the 0.2 m distance from fault surface, as a result of increase of coalification degree. It is assumed that, this type was caused by heat of friction which was rising during faulting. It is revealed as an increase of such parameters as: caking properties, vitrinite reflectance, calorific value and carbon content, as well as the decrease of oxygen, ash, and moisture content. The second type presents differed degree of coal quality decrease. This type was produced due to hypergenic processes. The author found four subtypes of oxidation-type changes of coal quality parameters in fault zones. The first one shows the highest level of hypergenic processes in a coal seam about 1 m off a fault plane. The second presents minor degree of oxidation processes in the coal seam at a smaller distance from the fault. The third one demonstrates minimum oxidation changes of coal quality at a distance of 0.2 m from the fault. The fourth subtype of the oxidation changes of coal quality has been observed only in tectonic breccia and not in the coal seams itself.The third types demonstrates faults which do not show any impact on changes of coal quality parameters. To this type belong faults from SW part of USCB and faults with downthrown up to 20 m.
Źródło:
Polish Geological Institute Special Papers; 2002, 7; 51-62
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oscillation criteria for third order nonlinear delay differential equations with damping
Autorzy:
Grace, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/1397865.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
oscillation
third order
delay differential equation
Opis:
This note is concerned with the oscillation of third order nonlinear delay differential equations of the form (r_2(t) (r_q(t)y^\prime(t))^\prime)^\prime + p(t)y^\prime(t)+q(t)f(y(g(t))) = 0$. (*) In the papers [A.Tiryaki, M.F. Aktas, Oscillation criteria of a certain class of third order nonlinear delay differential equations with damping, J. Math. Anal. Appl. 325 (2007), 54-68] and [M.F. Aktas, A. Tiryaki, A. Zafer, Oscillation criteria for third order nonlinear-functional differential equations, Applied Math. Letters 23 (2010), 756-762], the authors established some sufficient conditions which insure that any solution of equation (*) oscillates or converges to zero, provided that the second order equation $(r_2(t)z^\prime(t))^\prime + (p(t)//r_1(t))z(t)=0$ (**) is nonoscillatory. Here, we shall improve and unify the results given in the above mentioned papers and present some new sufficient conditions which insure that any solution of equation (*) oscillates if equation (**) is nonoscillatory. We also establish results for the oscillation of equation (*) when equation (**) is oscillatory.
Źródło:
Opuscula Mathematica; 2015, 35, 4; 485-497
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safe air
Autorzy:
Gourley, S. R.
Powiązania:
Army 1994, nr 8, s. 24-28
Data publikacji:
1994
Tematy:
Wojska lądowe obrona przeciwlotnicza środki bojowe modernizacja Stany Zjednoczone 1994 r.
Wojska lądowe obrona przeciwlotnicza rozwój planowanie Stany Zjednoczone 1994 r.
Opis:
Plany rozwoju obrony przeciwlotniczej wojsk lądowych Stanów Zjednoczonych. Modernizowanie i zwiększanie możliwości manewrowych środków obrony przeciwlotniczej.
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Rola i znaczenie rozpoznania w walce powietrzno-lądowej (wg poglądów amerykańskich)
Autorzy:
Gourley, S. R.
Powiązania:
Wojskowy Przegląd Zagraniczny 1989, z. 1, s. 15-20
Współwytwórcy:
J.L. Opracowanie
Data publikacji:
1989
Tematy:
Działania powietrznolądowe rozpoznanie teoria Stany Zjednoczone 1989 r.
Opis:
Fot.
Streszcz. art. "Tactical intelligence is key to the AIRLAND battle scenario".
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Laser Ignition of an Optically Sensitised Secondary Explosive by a Diode Laser
Autorzy:
Fang, X.
Ahmad, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/358053.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
laser ignition
explosive
optical sensitizers
Opis:
As a green technology, laser ignition of a relatively insensitive secondary explosive has been experimentally investigated. The explosive, hexanitrostilbene (HNS), was doped with one of two optical sensitizers, carbon black or a laser absorbing dye, and a continuous-wave (CW) infrared diode laser was used as the igniting source. The ignition sensitivities of HNS with each of the two optical sensitizers were analysed and compared in terms of: optical power threshold for ignition, ignition delay and full burn delay at various laser powers. The results have shown that both the chemical dye and carbon black optically sensitize the explosive with similar efficiencies. In contrast to the carbon black, the dye provides wavelength specificity and selectivity in the laser ignition process and its solubility in some specific solvents improves the coating of the explosive material. It was therefore concluded that the laser absorbing dye is a better candidate for optical sensitization in laser ignition than the commonly used carbon black. The combination of laser ignition sensitivity with wavelength selectivity potentially offers higher reliability and safety at a low optical power for future ignitors of secondary explosives.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 1; 103-115
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genome instability in fruit body derived lines generated from fruiting pfle somatic hybrid lines and development of hybrid strain specific SCAR marker in edible mushroom
Autorzy:
Mallick, P.
Sikdar, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/2118.pdf
Data publikacji:
2015
Wydawca:
Instytut Ogrodnictwa
Tematy:
mushroom
fruit body
genome instability
polymorphism
ISSR marker
somatic hybrid
hybrid strain
SCAR marker
edible mushroom
Źródło:
Journal of Horticultural Research; 2015, 23, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oczekiwany czas powtarzalności zdarzeń ekstremalnych w warunkach zmiany klimatu
The expected time period of extreme events in climate changing conditions
Autorzy:
Feluch, W.
Kozieł, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/136300.pdf
Data publikacji:
2007
Wydawca:
Szkoła Główna Służby Pożarniczej
Tematy:
ekstremalne zjawiska klimatyczne
zmiany klimatyczne
powodzie
Opis:
Występowaniu rzadkich, ekstremalnych zjawisk klimatycznych przypisuje się miary liczbowe charakteryzujące ich powtarzalność. Na przykład w monografii powodzi z lipca 1997 w Polsce [Dubicki, inni, 1999], czytamy: „Przepływy, które wystąpiły w czasie powodzi w lipcu 1997 roku w poszczególnych przekrojach wodowskazowych w profilu podłużnym Odry i Nysy Kłodzkiej znacznie odbiegają od zbioru danych dotychczas obserwowanych (1947–1997). Przewyższają one wartości p = 1%, jak i p = 0,1%. Z teoretycznej krzywej prawdopodobieństwa przekroczenia wynika, że ich prawdopodobieństwo jest rzędu p = 0,01%, tj. przepływ dziesięciotysiącletni. O przyszłym klimacie i ewentualnym zwiększeniu czy też spadku częstości i intensywności katastrofalnych zjawisk można raczej sądzić tylko w kategoriach prawdopodobieństwa. Z prognozowanym wzrostem średniej temperatury globalnej, [IPCC, 2001], jako miarę zmienności ewoluującego klimatu podaje się rozkłady prawdopodobieństwa w różnych latach XXI w. Zwraca się przy tym szczególną uwagę na okres lat 2070–2100. Na przykład Schär i inni [Schär, inni, 2004], omawiając katastrofalną falę gorąca, która wystąpiła w Europie Zachodniej latem 2003 roku, porównuje dwa gaussowskie rozkłady zmienności temperatury sezonu letniego w Szwajcarii. Charakteryzują się one różnymi wartościami średnimi (m ) oraz odchyleniami standardowymi (s ) określonymi na podstawie obserwacji z lat 1961−1990 oraz prognozowanymi dla lat 2071−2100. Pierwszy okres odpowiada aktualnej „normie klimatycznej”, natomiast dane statystyczne trzydziestolecia końca XXI w. uzyskane są jako wynik fizycznego modelowania ewolucji klimatu. I tak, anomalna wartość temperatury sezonu letniego 2003 r. w Szwajcarii była rzędu 5s w stosunku do normy, co, jak komentują Schär i inni, odpowiada powtarzalności „raz na 46 tys. lat”. Należy zwrócić uwagę na fakt, że następna fala gorąca w Europie Zachodniej wystąpiła już w 2006 r. Rekordowe wartości temperatury miały tym razem miejsce w Belgii, Holandii, na Wyspach Brytyjskich, w Zachodniej Polsce oraz w Norwegii i Szwecji. Dla przykładu, na Półwyspie Skandynawskim w 2006 r. anomalia sezonowej temperatury powietrza osiągnęła podobnie niewyobrażalny poziom, bliski 5s [ERA-40, Climate Anomalies].
The thesis of the paper is that the global warming reduce the time period of external hydro-meteorological phenomena. The surmount of the temperature a barrier moment is discussed for the example of summer season air temperature in France, climate nonstationarity and average time of expectation. The sensitivity of the average time of expectation for the proposed climate change rate h(t) which is similar to reliability rate, is also discussed. The conclusion of this paper is the presumption of veracity of the assumption stochastic climate nonstationarity. The design and decision category should make the average only time of expectation śr T, but no the time period klas T .
Źródło:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2007, 35; 63-72
0239-5223
Pojawia się w:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges in Integrating Wireless Sensor Network and Internet of Things for Environmental Monitoring
Autorzy:
Vijayalakshmi, S. R.
Muruganand, S.
Powiązania:
https://bibliotekanauki.pl/articles/1193537.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Environmental monitoring
Internet of Things
Temperature and humidity measurement
Wireless Sensor Network
Opis:
Hardware technology developments and wireless communications enables the development of wireless sensor networks (WSNs). WSN will need to be connected to the Internet due to its variety of applications and their importance. This paper discusses the challenges in integrating WSN and IoT (Internet of Things). The best ways of integrating WSN and IoT for environmental monitoring are analyzed. The sensor node is developed to monitor environmental parameters such as temperature and humidity. The sensor SHT75 to sense the temperature and humidity of the environment, XBeePro to communicate with gateway, LCD to display information are interfaced with MSP430 Microcontroller. The microcontroller is used for processing, controlling and communicating the information. The sensor nodes are deployed to measure the parameter in the target area. The information is communicated to the world of Internet in one of the best integrating ways discussed in the paper.
Źródło:
World Scientific News; 2016, 41; 1-8
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface wave generation due to glacier calving
Autorzy:
Massel, S.R.
Przyborska, A.
Powiązania:
https://bibliotekanauki.pl/articles/48424.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
surface wave
glacier
melting
climate warming
water surface
calving
geometrical factor
external factor
theoretical model
Źródło:
Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reverse logistic model for deteriorating item with preservation technology investment and learning effect in an inflationary environment
Autorzy:
Singh, S. R.
Rathore, H.
Powiązania:
https://bibliotekanauki.pl/articles/205799.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
reverse logistics
deterioration
preservation technology
learning
inflation
Opis:
Recycling is essential for the existence of the environment. Nowadays, recycling is also being promoted by the governments of numerous countries in the world. In the recycling process, the used items are collected from the customers and sent back to the remanufacturing unit. In the literature, many authors have assumed that the remanufactured items are as good as the freshly produced ones, but this is not really practical. The remanufactured items are of lower quality than the freshly produced ones. For purposes of studying the recycling process we have developed a reverse logistic model for the deteriorating items. The deterioration rate is treated as a controllable variable, which is controlled by investing in preservation technology. The demand rate is taken as exponential function of time with demand dependent manufacturing and remanufacturing rates. The fresh products are sold in the primary market and the remanufactured products are sold in the secondary market at a low selling price, in view of the low quality of remanufactured products. The whole study is carried out under the effect of learning in an inflationary environment and the learning coefficients are associated with production cost and set-up cost. The main objective of this study is to find the optimal cost value and the optimal operating times. At the end of this article numerical illustration is presented and sensitivity analysis is performed. The whole of the mathematical calculations is done with the use of the mathematical software Mathematica7.
Źródło:
Control and Cybernetics; 2016, 45, 1; 83-94
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of novel plant-based adjuvant formulation against rubella and hepatitis B vaccine antigen
Opracowanie nowego adiuwantu roślinnego przeciwko antygenom szczepionki przeciw różyczce i wirusowemu zapaleniu wątroby typu B
Autorzy:
Gupta, A.
Chaphalkar, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/71370.pdf
Data publikacji:
2016
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Opis:
Introduction: Numerous metabolites present in the aqueous extract from plants are responsible for inducing adjuvant activity against rubella and hepatitis B vaccine antigen (HBsAg). One of the medicinal plants, Adhatoda vasica has been pointed out with great potential of vaccine adjuvant property. Objective: The objective of our study is to evaluate the adjuvant potential of aqueous leaves extract of Adhatoda vasica against rubella and hepatitis B vaccine antigen (HBsAg). Methods: For these studies, our group evaluated the antibody (IgG) titre of HBsAg and rubella vaccine antigen using variable doses (0.625–5 mg) of aqueous leaves extract of Adhatoda vasica and also determined the lymphocyte (splenocyte) proliferation assay (0.625–5 mg; 50 µl) in mice model studies ex vivo (i.e. immunized with HBsAg subcutaneously). Results: The results showed that aqueous leaves extract showed anti-HBsAg and anti-rubella titre and also enhanced the lymphocyte proliferation assay at higher doses (5 mg) as compared to control. Conclusion: Aqueous leaves extract of Adhatoda vasica showed adjuvant activity against HBsAg and rubella vaccine antigen.
Wstęp: Wiele metabolitów obecnych w wyciągach wodnych z roślin jest odpowiedzialnych za indukcję adiuwantowej aktywności przeciwko antygenom szczepionek przeciw różyczce i wirusowemu zapaleniu wątroby typu B (HBsAg). Jedna z roślin leczniczych, Adhatoda vasica ma duży potencjał adiuwacyjny w szczepionce. Cel: Celem naszej pracy była ocena możliwości adiuwacyjnych wyciągu wodnego z liści Adhatoda vasica przeciwko antygenowi szczepionki przeciwko różyczce i wirusowemu zapaleniu wątroby typu B (HBsAg). Metody: Na użytek badań nasza grupa oceniła miano przeciwciała (IgG) HBsAg i antygenu szczepionki przeciwko różyczce przy pomocy różnych dawek (0,625–5 mg) wyciągu wodnego z liści Adhatoda vasica, a także określiła proliferację limfocytów (splenocytów) (0,625–5 mg; 50 µl) w modelu mysim ex vivo (tj. immunizowanych przez podawanie podskórne HBsAg). Wyniki: Na podstawie otrzymanych wyników wykazano, że wyciąg wodny z liści wpływał na miano przeciw HBsAg i przeciwróżyczkowe, a także w wyższych dawkach (5 mg) wzmacniał proliferację limfocytów w porównaniu do grupy kontrolnej. Wniosek: Wyciąg wodny z liści Adhatoda vasica wykazał działanie adiuwacyjne przeciwko antygenowi HBsAg i antygenowi szczepionki przeciwko różyczce.
Źródło:
Herba Polonica; 2016, 62, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual solutions for boundary layer flow of moving fluid over a moving surface with power-law surface temperature
Autorzy:
Mukhopadhyay, S.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265215.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
przepływ konwekcyjny
przepływ płynu
temperatura powierzchni
forced convective flow
moving fluid
flat surface
power-law surface temperature
dual solutions
Opis:
An analysis of heat transfer for boundary layer forced convective flow past a moving flat surface parallel to a moving stream is presented. The power-law surface temperature at the boundary is prescribed. The surface temperature varying directly (or inversely) with power-law exponent is considered. The similarity solutions for the problem are obtained and the reduced ordinary differential equations are solved numerically. To support the validity of the numerical results, a comparison is made with known results from the open literature for some particular cases of the present study. When the surface and the fluid move in the opposite directions, dual solutions exist.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 1; 113-124
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Slip effects on boundary layer flow and heat transfer along a stretching cylinder
Autorzy:
Mukhopadhyay, S.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265760.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
warstwa graniczna
cylinder
poślizg
przepływ ciepła
boundary layer
stretching cylinder
partial slip
heat transfer
similarity solution
Opis:
An axi-symmetric laminar boundary layer flow of a viscous incompressible fluid and heat transfer towards a stretching cylinder is presented. Velocity slip is considered instead of the no-slip condition at the boundary. Similarity transformations are used to convert the partial differential equations corresponding to the momentum and heat equations into non-linear ordinary differential equations. Numerical solutions of these equations are obtained by the shooting method. It is found that the velocity decreases with increasing the slip parameter. The skin friction as well as the heat transfer rate at the surface is larger for a cylinder compared to those for a flat plate.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 447-459
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probabilistic study of bone remodeling using finite element analysis
Autorzy:
Werner, C.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265649.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
analiza probabilistyczna
przebudowa kości
analiza elementów skończonych
probabilistic analysis
bone remodeling
finite element analysis
Opis:
The dynamic bone remodeling process is a computationally challenging research area that struggles to understand the actual mechanisms. It has been observed that a mechanical stimulus in the bone greatly affects the remodeling process. A 3D finite element model of a femur is created and a probabilistic analysis is performed on the model. The probabilistic analysis measures the sensitivities of various parameters related to the material properties, geometric properties, and the three load cases defined as Single Leg Stance, Abduction, and Adduction. The sensitivity of each parameter is based on the calculated maximum mechanical stimulus and analyzed at various values of probabilities ranging from 0.001 to 0.999. The analysis showed that the parameters associated with the Single Leg Stance load case had the highest sensitivity with a probability of 0.99 and the angle of the force applied to the joint of the proximal femur had the overall highest sensitivity.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 911-921
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication And Mechanical Properties Of A Nanostructured Complex Aluminum Alloy By Three-Layer Stack Accumulative Roll-Bonding
Wytwarzanie i właściwości mechaniczne nanostrukturalnego złożonego stopu aluminium wytworzonego przez walcowanie pakietowe trzech warstw
Autorzy:
Lee, S. H.
Lee, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/351499.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
accumulative roll-bonding (ARB)
aluminum alloy
microstructre
mechanical properties
akumulacyjne walcowanie pakietowe
stop aluminium
mikrostruktura
właściwości mechaniczne
Opis:
A multi-layered complex aluminum alloy was successfully fabricated by three-layer stack accumulative roll bonding(ARB) process. The ARB using AA1050 and AA5052 alloy sheets was performed up to 7 cycles at ambient temperature without lubrication. The specimen processed by the ARB showed a multi-layer aluminum alloy sheet in which two aluminum alloys are alternately stacked. The grain size of the specimen decreased with the number of ARB cycles, became about 350nm in diameter after 7cycles. The tensile strength increased with the number of ARB cycles, after 6c it reached 281MPa which is about twice higher than that of the starting material. The microstructures and mechanical properties of a three-layer AA1050/AA5052 alloy fabricated by the ARB were compared to those of the conventional ARB-processed material.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1195-1198
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decomposition of the Product of Cycles Based on Degree Partition
Autorzy:
Borse, Y. M.
Shaikh, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/31343576.pdf
Data publikacji:
2019-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
hypercube
Cartesian product
n-connected
regular
bipan- cyclic
spanning subgraph
Opis:
The Cartesian product of n cycles is a 2n-regular, 2n-connected and bi- pancyclic graph. Let G be the Cartesian product of n even cycles and let 2n = n1+ n2+ ・ ・ ・ + nk with k ≥ 2 and ni ≥ 2 for each i. We prove that if k = 2, then G can be decomposed into two spanning subgraphs G1 and G2 such that each Gi is ni-regular, ni-connected, and bipancyclic or nearly bipancyclic. For k > 2, we establish that if all ni in the partition of 2n are even, then G can be decomposed into k spanning subgraphs G1, G2, . . ., Gk such that each Gi is ni-regular and ni-connected. These results are analogous to the corresponding results for hypercubes.
Źródło:
Discussiones Mathematicae Graph Theory; 2019, 39, 1; 241-256
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wave-induced set-up and flow over shoals and coral reefs. Part 1. A simplified bottom geometry case
Autorzy:
Massel, S.R.
Brinkman, R.M.
Powiązania:
https://bibliotekanauki.pl/articles/47564.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
shoal
hydrodynamics
coral reef
shallow
biological variability
wave motion
morphology
water depth
linear function
Opis:
An analytical approach was used to model the wave-induced set-up and flow through simple shoal geometry when water depth is a linear function of the distance. Two different approaches were applied to parameterize the energy dissipation due to wave breaking. The resulting set-up height and flow velocity were determined and their dependence on the geometry of the shoal and offshore forcing was demonstrated. The extension of the solution to a more complicated bathymetry and verification against the experimental data will be given in the second part of the paper.
Źródło:
Oceanologia; 2001, 43, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Boundary layer flow and heat transfer over a permeable shrinking cylinder with surface mass transfer
Autorzy:
Bhattacharyya, K.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/955265.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
warstwa graniczna
wymiana ciepła
wymiana masy
boundary layer
heat transfer
shrinking cylinder
mass suction
Opis:
In the present paper, the axisymmetric boundary layer flow and heat transfer past a permeable shrinking cylinder subject to surface mass transfer is studied. The similarity transformations are adopted to convert the governing partial differential equations for the flow and heat transfer into the nonlinear self-similar ordinary differential equations and then solved by a finite difference method using the quasilinearization technique. From the current investigation, it is found that the velocity in the boundary layer region decreases with the curvature parameter and increases with suction mass transfer. Moreover, with the increase of the curvature parameter, the suction parameter and Prandtl number, the heat transfer is enhanced.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1003-1012
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Run-up of dispersive and breaking waves on beaches
Autorzy:
Massel, S.R.
Pelinovsky, E.N.
Powiązania:
https://bibliotekanauki.pl/articles/48764.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
fluctuation
wave transformation
filtration
beach
sandy beach
mathematical model
dispersive wave
surface wave
breaking wave
Opis:
Transformation of waves on sandy beaches, their breaking, set-up and run-up are the main factors contributing to fluctuations in the water table and groundwater flow. In this paper, the run-up mechanisms have been studied using analytical models. In contrast to the standard models, the waves approaching the shoreline are assumed to be dispersive and the equivalence of the non-linear and linear solutions for the extreme characteristics of wave run-up, such as the height of maximum run-up and the velocity of run-up, are used. A linear system of equations for the run-up of breaking waves is developed. This system is based on the application of the mild-slope equation in the deeper area, where waves are dispersive, while the linear equations of shallow water are applied close to the shoreline, where the water depth is a linear function of distance. The dissipation factor in the shallow water equation has been formulated using its resemblance to the mild-slope equation for a non-permeable sea bottom. Application of the method is illustrated for various bottom profiles and wave characteristics, and theoretical results compared well with experimental data. These solutions of the run-up phenomena will assist future studies on wave-induced beach groundwater flow.
Źródło:
Oceanologia; 2001, 43, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New genus of dimeropygid trilobites from the earliest Ordovician of Laurentia
Autorzy:
Adrain, J.M.
Westrop, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/21221.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Dimeropygidae
Hystricuridae
Ordovician
silicified fossil
Trilobita
dimeropygid trilobite
new genus
paleontology
trilobite
fossil
Ibexian
locality
stratigraphy
ecology
systematics
Opis:
The new genus Tulepyge includes a type species, T. tulensis nov., from the Barn Canyon Member of the House Formation, western Utah, USA, and T. paucituberculata from the Broom Point Member of the Green Point Formation, western Newfoundland, Canada. Both species are earliest Ordovician in age, with occurrence immediately above the Cambrian–Ordovician boundary. Together with the hystricurid taxon Millardicurus, the new genus is likely to serve as an indicator fossil for the Cambrian–Ordovician boundary in Laurentia, as it is already known from different biofacies on opposite margins of the continent. Tulepyge is not closely comparable with contemporaneous taxa assigned to Hystricuridae but in its dorsally convex and coarsely tuberculate exoskeleton it resembles taxa which have been referred to Dimeropygidae, most of which are considerably younger in age.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the influence of temperature and water level of the reservoir about the displacement of a concrete dam
Autorzy:
Oro, S. R.
Mafioleti, T. R.
Chaves Neto, A.
Garcia, S. R. P.
Neumann, C.
Powiązania:
https://bibliotekanauki.pl/articles/264428.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
zapora betonowa
analiza wieloczynnikowa
monitorowanie strukturalne
structural monitoring
concrete dam
multivariate analysis
Opis:
Multivariate techniques are used in this study to analyze the monitoring data displacements of a concrete dam, measured by means of pendulums, extensometer bases and multiple rod extensometers, taking into account the action of environmental conditions, bounded by the surface temperature of the concrete at ambient temperature and the tank water level. The canonical correlation analysis is used to evaluate the influence of environmental variables in the displacement of structures and dam foundations. The factor analysis is used to identify data sources of variability and order the sensors according to the action of factors. The dates of the measurements are grouped according to similarities in the present observations, by applying the cluster analysis. Then the discriminant analysis is used to assess the groups as to their homogeneity. The results demonstrate that the techniques used for distinguishing the dam responses and identify the effects of changes in environmental conditions on the displacements of the structures and dam foundations.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 1; 107-120
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unsteady MHD mixed convection flow of a micropolar fluid over a vertical wedge
Autorzy:
Roy, N. C.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/264759.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
micropolar fluid
unsteady flow
radiation
heat generation
płyn mikropolarny
przepływ nieustalony
promieniowanie
wytwarzanie ciepła
Opis:
An analysis is presented to investigate the unsteady magnetohydrodynamic (MHD) mixed convection boundary-layer flow of a micropolar fluid over a vertical wedge in the presence of thermal radiation and heat generation or absorption. The free-stream velocity and surface temperature are assumed to be oscillating in magnitude but not in the direction of the oncoming flow velocity. The governing equations have been solved by two distinct methods, namely, the finite difference method for the entire frequency range, and the series solution for low frequency range and the asymptotic series expansion method for the high frequency range. Numerical solutions provide a good agreement with the series solutions. The amplitudes of skin friction and couple stress coefficients are found to be strongly dependent on the Richardson number and the vortex viscosity parameter. The Prandtl number, the conduction-radiation parameter, the surface temperature parameter and the pressure gradient parameter significantly affect the amplitudes of skin friction, couple stress and surface heat transfer rates. However, the amplitudes of skin friction coefficient are considerably affected by the magnetic field parameter, whereas the amplitudes of heat transfer rate are appreciably changed with the heat generation or absorption parameter. In addition, results are presented for the transient skin friction, couple stress and heat transfer rate with the variations of the Richardson number, the vortex viscosity parameter, the pressure gradient parameter and the magnetic field parameter.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 2; 363-391
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A collaborative strategy for a three echelon supply chain with ramp type demand, deterioration and inflation
Autorzy:
Singh, N.
Vaish, B.
Singh, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/406653.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
three echelon supply chain
ramp type demand
deterioration
backlogging
inflation
Opis:
A supply chain system has been investigated in which a single manufacturer procures raw materials from a single supplier, processes them to produce finished products, and then delivers the products to a single retailer. The customer’s demand rate is assumed to be time-sensitive in nature (ramp type) that allows two-phase variation in the demand and production rate. Our adoption of ramp type demand reflects a real market demand for a newly launched product. Shortages are allowed with partial backlogging of demand (only for the retailer), i.e. the rest represent lost sales. The effects of inflation of the cost parameters and deterioration are also considered separately. We show that the total cost function is convex. Using this convexity, a simple algorithm is presented to determine the optimal order quantity and optimal cycle time for the total cost function. The results are discussed with numerical examples and particular cases of the model discussed briefly. A sensitivity analysis of the optimal solution with respect to the parameters of the system is carried out.
Źródło:
Operations Research and Decisions; 2014, 24, 3; 78-100
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation absorption and chemical reaction effects on Rivlin-Ericksen flow past a vertical moving porous plate
Autorzy:
Sravanthi, C. S.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/264592.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
płyn Rivlina-Ericksena
absorpcja promieniowania
reakcja chemiczna
ssanie
Rivlin-Ericksen fluid
radiation absorption
chemical reaction
variable temperature
concentration
suction
Opis:
An analysis has been carried out to study the combined effects of radiation absorption and chemical reaction on an incompressible, electrically conducting and radiating flow of a Rivlin-Ericksen fluid along a semi-infinite vertical permeable moving plate in the presence of a transverse applied magnetic field. It is assumed that the suction velocity, the temperature and the concentration at the wall are exponentially varying with time. The dimensionless governing equations for this investigation are solved analytically using two-term harmonic and non-harmonic functions. A comparison is made with the available results in the literature for a special case and our results are in very good agreement with the known results. A parametric study of the physical parameters is made and results are presented through graphs and tables. The results indicate that the fluid velocity and temperature could be controlled by varying the radiation absorption.
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 675-689
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of heat source/sink and chemical reaction on MHD Maxwell nanofluid flow over a convectively heated exponentially stretching sheet using homotopy analysis method
Autorzy:
Sravanthi, C. S.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265865.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
reakcja chemiczna
źródło ciepła
materiały porowate
HAM
chemical reaction
heat source/sink
Maxwell nanofluid
porous exponentially stretching sheet
convective boundary conditions
Opis:
The aim of this paper is to study the effects of chemical reaction and heat source/sink on a steady MHD (magnetohydrodynamic) two-dimensional mixed convective boundary layer flow of a Maxwell nanofluid over a porous exponentially stretching sheet in the presence of suction/blowing. Convective boundary conditions of temperature and nanoparticle concentration are employed in the formulation. Similarity transformations are used to convert the governing partial differential equations into non-linear ordinary differential equations. The resulting non-linear system has been solved analytically using an efficient technique, namely: the homotopy analysis method (HAM). Expressions for velocity, temperature and nanoparticle concentration fields are developed in series form. Convergence of the constructed solution is verified. A comparison is made with the available results in the literature and our results are in very good agreement with the known results. The obtained results are presented through graphs for several sets of values of the parameters and salient features of the solutions are analyzed. Numerical values of the local skin-friction, Nusselt number and nanoparticle Sherwood number are computed and analyzed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2018, 23, 1; 137-159
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of demand boosting policy on optimal inventory policy for imperfect lot size with backorder in fuzzy environment
Autorzy:
Yadav, D.
Singh, S. R.
Kumari, R.
Powiązania:
https://bibliotekanauki.pl/articles/206244.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
learning curve
advertisement
signed distance
triangular fuzzy number
backorder
inventory model
Opis:
This paper investigates an Economic Order Quantity (EOQ) model with backorder by taking imprecise demand rate with dependence upon the frequency of advertisement. The formulated model also incorporates learning effects on percentage of defective items present in each lot. Due to imprecision in demand, the obtained profit function is fuzzy. To determine the optimal values, we determine the equivalent crisp profit function by applying the signed distance method. Optimal order quantity and backorder level are obtained by using algebraic method in place of differential calculus. A numerical example is used to study the behavior of the model with respect to different inventory parameters. All calculations are performed with MATLAB 7.4.
Źródło:
Control and Cybernetics; 2012, 41, 1; 191-212
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient velocity and steady state entropy generation in a microfluidic Couette flow containing charged nano particles
Autorzy:
Gorla, R. S. R.
Gireesha, B. J.
Powiązania:
https://bibliotekanauki.pl/articles/264851.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
transient velocity
steady state entropy generation
microfluidic Couette flow
charged nanoparticles
Bejan number and Brinkman number
przepływ Couette'a
liczba Brinkmana
nanocząsteczki
Opis:
An analysis has been provided to determine the transient velocity and steady state entropy generation in a microfluidic Couette flow influenced by electro-kinetic effect of charged nanoparticles. The equation for calculating the Couette flow velocity profile is derived for transient flow. The solutions for momentum and energy equations are used to get the exact solution for the dimensionless velocity ratio and dimensionless entropy generation number. The effects of the dimensionless entropy generation number, Bejan number, irreversibility ratio, entropy generation due to fluid friction and due to heat transfer on dimensionless time, relative channel height, Brinkman number, dimensionless temperature ratio, nanoparticle volume fraction are analyzed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2015, 20, 4; 787-804
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutritional parameters of CSR2 and PM X CSR2 strains of Bombyx mori fed with Neutral red as a food supplement
Autorzy:
Anto, Anumol
Vasugi, S. R.
Ganga, S.
Powiązania:
https://bibliotekanauki.pl/articles/1177436.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bombyx mori
efficiency conversion
neutral red
nutritional traits
Opis:
Recently, there are various methods to incorporate additional properties into silkworm silk, during its production in the silk gland itself. These advanced properties involve additional mechanical strength, colour, ultraviolet resistance, etc. and it is utilized for a wide range of applications. The property which focused in this study is the colour, an important quality attribute of silk. Effect of neutral red, a vital dye used as dietary supplement and its nutritional effects on Bombyx mori (B. mori) along with the colour manipulating efficiency on the larvae were observed. The colour change noticed from larval to cocoon stage confirms its efficiency to get into the silk gland of the animal crossing through the integument and haemolymph. The results of the observed nutritional parameters confirms that the selected dye in the selected concentration is suitable to produce colour cocoons without disturbing the nutritional traits such as ingesta, digesta, approximate digestibility percentage, growth rate, efficiency conversion rate, etc. of the larva. The findings elucidates that more vital dyes may use for the production of colour silk without causing any harm to the silkworm physiology. As the dye has no harmful effect in the dietary parameters, which plays a major role in the growth of the larva and production of silk, it is assumed that it may not affect the economical and biochemical parameters also. However, it has to be confirmed by further analyses.
Źródło:
World Scientific News; 2018, 103; 157-166
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inventory models with multiple production and remanufacturing batches under shortages
Autorzy:
Singh, S. R.
Sharma, S.
Kumar, M.
Powiązania:
https://bibliotekanauki.pl/articles/206729.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
inventory models
production
remanufacturing
shortages
Opis:
Owing to the ecological requirements and regulations, an enormous concern is being paid to the product re-processing. In the established literature, researchers considered that the remanufactured items are as good as the new ones. Yet, such an assumption is not convenient, as in many real situations the recycled products are considered by the customers to be of secondary quality. Further, the classical studies mainly addressed the inventory models without shortages, and this is not applicable in many practical business situations. This paper extends the reverse logistics inventory models with finite production and remanufacturing rate along with the assumption that newly produced and repaired (remanufactured) objects are not of same characteristics. Shortages are allowed and numerous stock-out cases are discussed. The collected used items are remanufactured (repaired) and non-repaired products are disposed off. The proposed models are illustrated with some numerical examples and their results are discussed.
Źródło:
Control and Cybernetics; 2016, 45, 3; 385-416
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experiments on wave motion and suspended sediment concentration at Nang Hai, Can Gio mangrove forest, Southern Vietnam
Autorzy:
Hong Phuoc, V.L.
Massel, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/47937.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
subtropical zone
marine environment
trophodynamic process
Vietnam
mangrove forest
biogeochemical process
concentration
Can Gio area
wave motion
suspended sediment
Opis:
Biogeochemical and trophodynamic processes as well as hydrodynamic factors play a major role in the structure and function of mangrove ecosystems. This study outlines field experiments on wave motion and suspended sediment concentration carried out at Nang Hai, Can Gio mangrove forest, Southern Vietnam. Pressure sensors were used to measure sea surface elevation, and Optical Backscatter Sensors (OBS) were applied to detect infrared (IR) radiation scattered from suspended particles in order to measure turbidity and suspended sediment concentrations. The experimental results indicate that most of the energy is dissipated inside the mangrove forest as a result of wave-trunk interactions and wave breaking. The suspended sediment concentration depends on wave intensity and tidal current velocity. Wave action is one of the main factors forcing sediment transport and coastal erosion at the study site; even the wave field at the study site is not so strong. The establishment of mangrove vegetation can encourage the deposition of sediment, or at least the retention of the flood-tide sediment influx.
Źródło:
Oceanologia; 2006, 48, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attenuation of wave-induced groundwater pressure in shallow water. Part 2. Theory
Autorzy:
Massel, S.R.
Przyborska, A.
Przyborski, M.
Powiązania:
https://bibliotekanauki.pl/articles/48824.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
water pressure
filtration
mathematical modelling
groundwater pressure
sandy beach
surface wave
Źródło:
Oceanologia; 2005, 47, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attenuation of wave-induced groundwater pressure in shallow water. Part 1
Autorzy:
Massel, S.R.
Przyborska, A.
Przyborski, M.
Powiązania:
https://bibliotekanauki.pl/articles/49074.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
fluctuation
oceanic water
attenuation
filtration
groundwater pressure
sandy beach
beach ecosystem
surface wave
shallow water
Opis:
A coastal aquifer has a dynamic seaward boundary at the beach face where physical and ecological processes are influenced by oceanic water level fluctuations. Many basic groundwater concepts and the role of the impact of groundwater seepage on beach ecosystems are still poorly understood. Studies are needed to improve our understanding of the relationships between surface and subsurface flow processes on beaches. This is particularly helpful in clarifying the interaction of the physical processes, biodiversity and productivity of sandy beaches, sediment transport and coastal structure stability and modern beach nourishment techniques. As the estimation of infiltration into beach sand is very difficult to carry out under real sea conditions, a control led large-scale laboratory experiment was carried out in the LargeWave Channel in Hannover (Germany) as part of a project supported by the European Community (contract HPRI-CT-2001-00157). First part of the paper describes the technology applied in the experiment and reports some preliminary results.
Źródło:
Oceanologia; 2004, 46, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-solvent sonocrystallisation of lactose
Autorzy:
Patel, S.R.
Murthy, Z.V.P.
Powiązania:
https://bibliotekanauki.pl/articles/185611.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
n-propanol
odzyskiwanie laktozy
antyrozpuszczalnik
lactose recovery
anti-solvent
sonocrystallisation
Opis:
The present work deals with ultrasound assisted crystallisation of lactose from lactose solution. The crystallisation of lactose was completed rapidly by applying the ultrasound waves in the presence of an anti-solvent (n-propanol), at the room temperature (30š3°C). The yield of lactose was found to be more than 85% (w/w) in 4 minutes of sonication. The spread of the crystal size distribution was found to decrease with increase in sonication time.
Źródło:
Chemical and Process Engineering; 2011, 32, 4; 379-389
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A three level integrated inventory model with time dependent demand and production rate under a trade credit policy for both distributor and retailer
Autorzy:
Singh, N.
Vaish, B.
Singh, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/206192.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
time dependent demand
variable production rate
three echelon supply chain
trade credit
Opis:
This paper develops a three echelon supply chain inventory model with permissible delay in payment, in which distributor and retailer’s demand is time dependent and production rate for manufacturer is also time sensitive. The models consider the two level trade credit policy in manufacturer-distributor and distributor-retailer relationship in this supply chain model. A simple solution algorithm is presented to determine the optimal order quantity and optimal cycle time of the total cost function and the number of shipments for distributor and retailer. The results are discussed with numerical examples and the particular cases of the model are also discussed in brief.
Źródło:
Control and Cybernetics; 2014, 43, 3; 439-469
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress-tolerant antagonistic plant growth-promoting rhizobacteria from Zea mays
Autorzy:
Kaur, A.
Devi, S.R.
Vyas, P.
Powiązania:
https://bibliotekanauki.pl/articles/66648.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plant disease
biological control
plant health
antagonism
plant growth
Bacillus
maize
Zea mays
stress tolerance
phosphate solubilization
Opis:
Biological control of plant diseases is strongly emerging as an effective alternative to the use of chemical pesticides and fungicides. Stress tolerance is an important attribute in the selection of bacteria for the development of microbial inoculants. Fourteen salt-tolerant bacteria showing different morphological features isolated from the rhizosphere of maize were evaluated for different plant growth-promoting activities. All isolates showed auxin production ranging from 5 to 24 μg ⋅ ml–1 after 48 h incubation in tryptophan supplemented media. Phosphate solubilization ranged from 15 to 419 μg ⋅ ml–1. 1-aminocycloproprane- 1-carboxylate (ACC) deaminase activity was shown by 6 isolates, ammonia production by 9 isolates, siderophore production by 8 isolates while HCN production by 4 isolates. Four bacterial isolates with all plant growth-promoting properties also showed strong antagonistic activities against Fusarium oxysporum, F. verticillioides, Curvularia lunata and Alternaria alternata and abiotic stress tolerance against salinity, temperature, pH and calcium salts. Two selected bacterial isolates significantly enhanced the growth of pea and maize test plants under greenhouse conditions. The bacterial isolate M1B2, which showed the highest growth promotion of test plants, was identified as Bacillus sp. based on phenotypic and 16S rDNA gene sequencing. The results indicated that Bacillus sp. M1B2 is a potential candidate for the development of microbial inoculants in stressful environments.
Źródło:
Journal of Plant Protection Research; 2018, 58, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pro-environmental activities of consumers
Pro-środowiskowa działalność konsumentów
Autorzy:
Jotanovic, S. R.
Ratkovic, M.
Zakic, N.
Powiązania:
https://bibliotekanauki.pl/articles/405553.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
pro-environmental activities
consumer behavior
cross-cultural comparison
działania proekologiczne
zachowania konsumenckie
porównanie międzykulturowe
Opis:
The aim of the study is to compare pro-environmental activities between consumers in Serbia, Croatia, Bosnia and Herzegovina, FYR Macedonia, Slovenia and Montenegro. Empirical research was conducted on a sample of 1,550 participants from these countries. The results indicate that there are differences between consumers from: Montenegro and Serbia, Montenegro and Macedonia, Montenegro and Slovenia, Bosnia and Herzegovina and Slovenia and Bosnia and Herzegovina and Macedonia. Consumers from Montenegro and Bosnia and Herzegovina achieve significantly lower scores in the pro-environmental activities. Also, results indicate that there are no differences in gender, age and professional qualification related to pro-environmental activities between consumers. Differences in monthly incomes by households exist but post hock test not indicate to the exactly differences. The received data can be used by all market participants from these countries for increase pro-environmental activities of consumers.
Celem badania jest porównanie działań proekologicznych między konsumentami w Serbii, Chorwacji, Bośni i Hercegowinie, Macedonii, Słowenii i Czarnogórze. Badania empiryczne przeprowadzono na próbie 1550 uczestników pochodzących z wymienionych krajów. Wyniki wskazują, że istnieją różnice między konsumentami z: Czarnogóry i Serbii, Czarnogóry i Macedonii, Czarnogóry i Słowenii, Bośni i Hercegowiny oraz Słowenii i Bośni i Hercegowiny oraz Macedonii. Konsumenci z Czarnogóry oraz Bośni i Hercegowiny osiągają znacznie niższe wyniki w działaniach prośrodowiskowych. Ponadto wyniki wskazują, że nie ma różnic pod względem płci, wieku i kwalifikacji zawodowych związanych z działaniami prośrodowiskowymi między konsumentami. Różnice w dochodach miesięcznych według gospodarstw domowych istnieją, jednak test post hoc nie wykazał konkretnych różnic. Otrzymane dane mogą być wykorzystywane przez wszystkich uczestników rynku z tych krajów w celu zwiększenia działań prośrodowiskowych konsumentów.
Źródło:
Polish Journal of Management Studies; 2017, 16, 1; 55-66
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oscillatory and asymptotic behavior of a third-order nonlinear neutral differential equation
Autorzy:
Graef, J. R.
Tunc, E.
Grace, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/255282.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
third order
neutral differential equations
asymptotic behavior
nonoscillatory
oscillatory solution
Opis:
This paper discusses oscillatory and asymptotic properties of solutions of a class of third-order nonlinear neutral differential equations. Some new sufficient conditions for a solution of the equation to be either oscillatory or to converges to zero are presented. The results obtained can easily be extended to more general neutral differential equations as well as to neutral dynamic equations on time scales. Two examples are provided to illustrate the results.
Źródło:
Opuscula Mathematica; 2017, 37, 6; 839-852
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An intial-value technique for self-adjoint singularly perturbed two-point boundary value problems
Autorzy:
Padmaja, P.
Aparna, P.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/264933.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
wartość początkowa
wartość brzegowa
perturbacja procesu
initial value technique
boundary value problem
singular perturbation problem
Opis:
In this paper, we present an initial value technique for solving self-adjoint singularly perturbed linearvboundary value problems. The original problem is reduced to its normal form and the reduced problem is converted to first order initial value problems. This replacement is significant from the computational point of view. The classical fourth order Runge-Kutta method is used to solve these initial value problems. This approach to solve singularly perturbed boundary-value problems is numerically very appealing. To demonstrate the applicability of this method, we have applied it on several linear examples with left-end boundary layer and rightend layer. From the numerical results, the method seems accurate and solutions to problems with extremely thin boundary layers are obtained.
Źródło:
International Journal of Applied Mechanics and Engineering; 2020, 25, 1; 106-126
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Documentation of tribal’s traditional knowledge of medicinal plants from Renlagadda Thanda, Kodangal mandal, Mahabubnagar Dist, Telangana, India
Autorzy:
Shivakumar Singh, P.
Rajender Singh, D.S.R.
Powiązania:
https://bibliotekanauki.pl/articles/11807.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The aim of this report is giving the importance in need of ground leveal documentation of medicinal plants, their ingrediants and usage. To be effort has been made to evaluate plants used for medicare by the tribal people of Renla Gadda Thanda, Kodangal mandal, Mahabubnagar Dist, Telangana. Due to be deficient in of modern healthcare facilities and poor economic conditions, the tribal people of the Thanda fully depend on in the vicinity available medicinal plants for their healthcare needs. In the present report a total of 24 ethnomedicinal plants from 23 genus and 24 species occupied 18 families were recorded. The thorough information i.e., Usage, to be treated disorder, Parts used recorded. This is a first report from the Renlagadda Thanda of Kodangal mandal. The study area having wealthy in medicinal plants flora and tribal communities with latest usages. Documentation of traditional knowledge on medicinal plants from the village or thanda level is the elementary and necessary samples for novel medication.
Źródło:
International Letters of Natural Sciences; 2015, 08
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A numerical study of coupled non-linear equations of thermo-viscous fluid flow in cylindrical geometry
Autorzy:
Pothanna, N.
Aparna, P.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265510.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
Reiner Rivlin Cross viscosity
thermal conductivity
thermo-stress viscosity
Prandtl number
lepkość
przenoszenie ciepła
liczba Prandtla
Opis:
In this paper we present numerical solutions to coupled non-linear governing equations of thermo-viscous fluid flow in cylindrical geometry using MATHEMATICA software solver. The numerical results are presented in terms of velocity, temperature and pressure distribution for various values of the material parameters such as the thermo-mechanical stress coefficient, thermal conductivity coefficient, Reiner Rivlin cross viscosity coefficient and the Prandtl number in the form of tables and graphs. Also, the solutions to governing equations for slow steady motion of a fluid have been obtained numerically and compared with the existing analytical results and are found to be in excellent agreement. The results of the present study will hopefully enable a better understanding applications of the flow under consideration.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 965-979
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability, inheritance and correlation for mineral contents in cabbage (Brassica oleracea var. capitata L.)
Autorzy:
Singh, B.K.
Sharma, S.R.
Singh, B.
Powiązania:
https://bibliotekanauki.pl/articles/2100.pdf
Data publikacji:
2013
Wydawca:
Instytut Ogrodnictwa
Tematy:
cabbage
Brassica oleracea var.capitata
genetic variability
inheritance
mineral content
dietary mineral
iron
zinc
copper
manganese
potassium
calcium
heritability
Źródło:
Journal of Horticultural Research; 2013, 21, 1
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Model for a Frequency-Dependent Non-Linear Reactor
Autorzy:
Mokhtari, H.
Ghodsinya, S. R. M.
Rajabi, A.
Powiązania:
https://bibliotekanauki.pl/articles/262610.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
frequency-dependent
inductors
harmonic
power quality
Opis:
Increase of power electronic devices has resulted in current/voltage harmonic pollution in power systems. Harmonics have adverse effects on equipment with magnetic materials. This paper investigates effects of harmonics on inductors and proposes a new model for a non-linear frequency-dependent inductor. Tbe study is based on experiments in which inductors are subjected to sinusoidal inputs at different frequencies. The accuracy of the proposed formula is also investigated.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2009, 15, 1; 15-18
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of surface heat inversions characteristics around Baghdad station
Autorzy:
Al-Ghrybawi, S.R.
Al-Jiboori, M.H.
Powiązania:
https://bibliotekanauki.pl/articles/887546.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Scientific Review Engineering and Environmental Sciences; 2019, 28, 4[86]
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Homotopy simulation of non-Newtonian Spriggs fluid flow over a flat plate with oscillating motion
Autorzy:
Ray, A. K.
Vasu, B.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265238.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
przepływ nieściśliwy
przepływy Stokes'a
płyn nienewtonowski
incompressible flow
oscillatory plate
Stokes second problem
HAM
non-Newtonian Spriggs fluid
Opis:
An incompressible flow of a non-Newtonian Spriggs fluid over an unsteady oscillating plate is investigated using the Homotopy Analysis Method (HAM). An analytic solution of sine and cosine oscillations of the plate has been obtained. The similarity transformation is introduced to reduce the governing partial differentia equations into a single non-linear dimensionless partial differential equation. The effects of the power index of Spriggs fluid and convergence control parameter of HAM for the flow are studied extensively. The range of the convergence control parameter for convergence of series solution for different values of the power index of Spriggs fluid is obtained. The solution for a Spriggs fluid is noticeably different from the solution obtained for a Newtonian fluid. The influences of the shear thinning and shear thickening fluid on the velocity profile are shown graphically. The transient flow effect is higher for non-Newtonian Spriggs fluid than that of a Newtonian fluid. It is also observed that the interval to reach the steady state for the cosine case is less than the sine case. The applications of Stokes’ second problem have been widely found in the variety of fields of biomedical, medical, chemical, micro and nanotechnology.
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 359-385
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climate response of Salix oritrepha growth along a latitudinal gradient on the northeastern Tibetan Plateau
Autorzy:
Lu, X.
Sigdel, S.R.
Dawadi, B.
Wang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2077745.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
shrub
radial growth
climate sensitivity
dendrochronology
summer temperature
Opis:
Shrubs are widespread at higher altitudes and latitudes. Dendrochronology of shrub growth has been intensively studied in the circumpolar Arctic, Mediterranean and Patagonia. However, relatively little is known about shrub growth responses to climate change on the Tibetan Plateau. Herein, we investigate climate sensitivity of Salix oritrepha growth along a north–south (35–39° N) latitudinal gradient on the north- eastern Tibetan Plateau. Four S. oritrepha shrub sites were selected for dendrochronology study. Pearson and partial correlation analyses were used to estimate strength of the climate sensitivity of the growth time series at each site. We found that not all of the site chronologies show consistent variations. Despite of this, its ra- dial growth was primarily limited by the July mean temperature across the latitudinal gradient, and warming summer climate tends to increase the growth of S. oritrepha on the northeastern Tibetan Plateau.
Źródło:
Dendrobiology; 2019, 81; 14-21
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidation of a lignin model compound of benzyl-ether type linkage in water with H2O2 under an oxygen atmosphere catalyzed by Co(Salen)
Utlenianie modelowego związku ligniny z typem wiązania benzylowo-eterowego w wodzie z H2O2 w atmosferze tlenu katalizowane Co(Salen)
Autorzy:
Zhou, X.F.
Qin, J.X.
Wang, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/52363.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
oxidation
lignin model compound
benzyl-ether type
linkage
water
oxygen atmosphere
cobalt salen complex
catalytic property
analytical technique
veratrylglycerol-beta-guaiacyl-alpha,gamma-dimethylether
Opis:
The catalytic properties of Cobalt salen? complex in the oxidation of a lignin model compound [veratrylglycerol-β-guaiacyl-α,γ-dimethylether, VGD] have been investigated in order to obtain the mechanistic aspects of the reaction between Co(salen) and VGD under an oxygen atmosphere using hydrogen peroxide as an oxidant. VGD was found to undergo structural changes in response to the catalytic reaction as characterised by different analytical techniques (FT-IR, H-1 NMR and GC-MS), yielding 2-methoxy phenol and biphenyl. A mechanism for the oxidation of VGD was postulated.
Zbadano katalityczne właściwości kompleksu Co(Salen) w utlenianiu modelowego związku ligniny (veratrylglycerol-β-guaiacyl-α,γ-dimetyleter, VGD) w celu określenia mechanicznych aspektów reakcji pomiędzy Co(salen) i VGD w atmosferze tlenu przy zastosowaniu nadtlenku wodoru jako utleniacza. Zaobserwowano, że w VGD zaszły zmiany strukturalne w odpowiedzi na reakcję katalityczną, co przedstawiono za pomocą różnych technik analitycznych (FTIR, H-1 NMR oraz GC-MS). W efekcie otrzymano 2-metoksy fenol i bifenyl.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2011, 54, 186
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A scalable tree based path planning for a service robot
Autorzy:
Nippun Kumaar, A. A.
Kochuvila, Sreeja
Nagaraja, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/2204556.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
learning from demonstration
path mapping
path planning
navigation system
mobile robot
service robot
Opis:
Path planning plays a vital role in a mobile robot navi‐ gation system. It essentially generates the shortest tra‐ versable path between two given points. There are many path planning algorithms that have been proposed by re‐ searchers all over the world; however, there is very little work focussing on path planning for a service environ‐ ment. The general assumption is that either the environ‐ ment is fully known or unknown. Both cases would not be suitable for a service environment. A fully known en‐ vironment will restrict further expansion in terms of the number of navigation points and an unknown environ‐ ment would give an inefficient path. Unlike other envi‐ ronments, service environments have certain factors to be considered, like user‐friendliness, repeatability, sca‐ lability, and portability, which are very essential for a service robot. In this paper, a simple, efficient, robust, and environment‐independent path planning algorithm for an indoor mobile service robot is presented. Initially, the robot is trained to navigate to all the possible desti‐ nations sequentially with a minimal user interface, which will ensure that the robot knows partial paths in the en‐ vironment. With the trained data, the path planning al‐ gorithm maps all the logical paths between all the des‐ tinations, which helps in autonomous navigation. The al‐ gorithm is implemented and tested using a 2D simulator Player/Stage. The proposed system is tested with two dif‐ ferent service environment layouts and proved to have features like scalability, trainability, accuracy, and repe‐ atability. The algorithm is compared with various classi‐ cal path planning algorithms and the results show that the proposed path planning algorithm is on par with the other algorithms in terms of accuracy and efficient path generation.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2022, 16, 1; 31--45
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamical analysis of stiffened plates under patch loading
Autorzy:
Srivastava, A. K. L.
Pandey, S. R.
Kumar, A.
Powiązania:
https://bibliotekanauki.pl/articles/265921.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda elementów skończonych
obciążenie krawędziowe
częstotliwość drgań
usztywniacz
FEM
partial edge loadings
buckling load
vibration frequency
stiffener
Opis:
The vibration characteristics of stiffened plates with cutouts subjected to in-plane partial edge loadings at one end at the plate boundaries are studied using the finite element method. Buckling loads and vibration frequencies are determined for different cutout ratios and extent of partial edge loading at one end. In the structural modelling, the plate and the stiffeners are treated as separate elements where the compatibility between these two types of elements is maintained. The main elegance of the formulation lies in the treatment of the stiffeners. The stiffeners can be placed anywhere within the plate element, and need not be placed on the nodal lines. The vibration characteristics are discussed and the results are compared with those available in the literature. Numerical results are presented for a range of cutout to plate size from 0 to 0.8.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 537-553
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural convection and radiation in a radial porous fin with variable thermal conductivity
Autorzy:
Darvishi, M. T.
Kani, F.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/955178.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
konwekcja naturalna
promieniowanie
wydajność cieplna
metoda kolokacji
porous radial fin
natural convection
radiation
thermal performance
spectral collocation method
Opis:
In this study, the effects of radiation and convection heat transfer in a radial porous fin are considered. The geometry considered is that of a rectangular profile fin. The porous fin allows the flow to infiltrate through it and solid-fluid interaction takes place. This study is performed using Darcy’s model to formulate the heat transfer equation. The thermal conductivity is assumed to be a function of temperature. The effects of the natural convection parameter Nc , radiation parameter Nr and thermal conductivity parameter m on the dimensionless temperature distribution and heat transfer rate are discussed. The results suggest that the radiation transfers more heat than a similar model without radiation.
Źródło:
International Journal of Applied Mechanics and Engineering; 2014, 19, 1; 27-37
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of Trichoderma Hamatum for Biocontrol of Lentil Vascular Wilt Disease: Efficacy, Mechanisms of Interaction And Future Prospects
Autorzy:
El-Hassan, S.A.
Gowen, S.R.
Pembroke, B.
Powiązania:
https://bibliotekanauki.pl/articles/65520.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Trichoderma hamatum (Bonord.) Bainier was evaluated for its antagonistic potential against Fusarium oxysporum Schlecht. emend. Snyder and Hansen sp. lentis, the causal agent of vascular wilt disease of lentil (Lens culinaris Medikus). Hyphal interactions on Petri plates resulted in an increase in the number of conidial spores and an increase in the vegetative growth of T. hamatum, and a decrease in the hyphal formation and sporulation of F. oxysporum f. sp. lentis. Electron and light microscopical observations suggested that hyphae of T. hamatum established aggressive contact and attachment with the hyphae of the pathogen. Growing in parallel, coiled densely and tightly, T. hamatum may penetrate those of the pathogen hyphae causing collapse due to the loss of turgor pressure. The cellulolytic enzymes produced by T. hamatum presented sufficient characteristics for its antifungal activity in the hyphae hydrolysis and competition process. In growth room and glasshouse experiments, the addition of the conidial suspension of T. hamatum or its culture filtrate to soil, significantly (p ≤ 0.05) reduced development and spore germination of F. oxysporum. In the rhizosphere, T. hamatum occupied the same ecological niches (rhizosphere, roots, and stems) parasitizing F. oxysporum f. sp. lentis. Treatments using T. hamatum delayed the time of infection by F. oxysporum, promoted the growth, and increased the dry weight of a susceptible variety of lentil (cv. Precoz). The percent of mortality was reduced to 33 and 40% when using T. hamatum and its filtrate, respectively, compared to 93% in the control treatment during the 65 days of growing in loam/sand (2:1 vol/vol) under glasshouse conditions. Plant colonization results indicate that T. hamatum and its filtrate significantly (p ≤ 0.05) reduced development of the pathogen in the vascular tissue of lentil to < 30 and < 40% stem colonization, respectively, compared to 100% in the plant pathogen control. Our results suggest that potential biocontrol mechanisms of T. hamatum towards F. oxysporum f. sp. lentis were antibiosis by production of antifungal enzymes, complex mechanisms of mycoparasitism, competition for key nutrients and/or ecological niches, growth promotion, and a combination of these effects. This study results hold important suggestions for further development of effective strategies of the biological control of Fusarium vascular wilt of lentil.
Źródło:
Journal of Plant Protection Research; 2013, 53, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of position of fruits in a tree and number of fruits per panicle on growth and quality of citrus
Autorzy:
Sakhidin, -
Teixeira de Silva, J.A.
Suparto, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/1076701.pdf
Data publikacji:
2018
Wydawca:
Instytut Ogrodnictwa
Tematy:
citrus
citrus fruit
citrus orchard
central Java
Indonesia
fruit diameter
fruit weight
fruit pulp
sugar content
vitamin C
Opis:
This research aimed to study the effect of the position of fruits in a tree (inner or outer) and the number of fruits per panicle (one, two or three) on the growth and quality of citrus ‘Pontianak’. The study was conducted in a citrus orchard in Central Java, Indonesia for two seasons, 2014/2015 and 2015/2016. The results indicated that position of fruits on the tree did not influence weight and diameter of fruits, weight of fruit pulp, and contents of sugars and total acids. Increasing the number of fruits per panicle decreased the weight and diameter of fruits and the weight of pulp but increased the contents of vitamin C and total acids.
Źródło:
Journal of Horticultural Research; 2018, 26, 1
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Horizontal collaboration in logistics: a comprehensive framework
Autorzy:
Pomponi, F.
Fratocchi, L.
Tafuri, S. R.
Palumbo, M.
Powiązania:
https://bibliotekanauki.pl/articles/409475.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
Horizontal Collaboration
Collaborative Logistics
Theoretical Framework
Opis:
Cooperation in logistics is widely recognised as one of the core challenges for the next future. In this context, horizontal collaboration is believed to be one of the innovative solutions to effectively tackle the growing logistic challenges from both, environmental and economic points of view. This innovative topic is quickly gaining momentum but the literature in the field is still in its infancy. As a consequence, a methodological tool to support project and implementation of successful horizontal partnership is still not available. In this paper, we propose a comprehensive framework based on an extensive literature review of both, scholars and practitioners. The proposed tool is based on an incremental perspective, according to which mutual trust among partners is developed through continuous collaboration. More specifically, three steps are proposed: operational, tactical and strategic. For each of them a coherent couple of aims and shared assets is defined.
Źródło:
Research in Logistics & Production; 2013, 3, 4; 243-254
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of quercetin-functionalized silver nanoparticles by rapid one-pot approach
Autorzy:
Pandian, S.R.K.
Kunjiappan, S.
Ravishankar, V.
Sundarapandian, V.
Powiązania:
https://bibliotekanauki.pl/articles/2096369.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quercetin
bioflavonoid
one-pot synthesis
AgNPs
antioxidant
Opis:
Nanotechnology plays a pivotal role in all areas of science, and the synthesis and surface modification of nanoparticles are crucial in this field. Metal nanoparticles synthesized using plant extracts or phytocompounds are highly significant in the development of various therapeutics and diagnostics. In the present study, we report the one-pot and rapid synthesis of silver nanoparticles (AgNPs) by quercetin, a flavonoid found in various edible plants. The nanoparticles were then characterized using UV-VIS spectrophotometry, Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The role of quercetin in the synthesis of silver nanoparticles was demonstrated. The nanomaterial was 20–30 nm in size and spherical in shape. The silver nanoparticles were also confirmed to show antioxidant activity at 80 μg/ml concentration in vitro by DPPH, FRAP, and power reduction methods.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 1; 75-84
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In-situ observations of devolatilisation of coal
Autorzy:
Strezov, V.
Lucas, J. A.
Osborn, S. R.
Strezov, L.
Powiązania:
https://bibliotekanauki.pl/articles/1204890.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
coal
swelling
devolatilisation
tars
specific heat
reactions
Opis:
Coal devolatilisation phenomena were observed in-situ during heating. A single particle of coal of approximately 1 mm diameter was placed on a stainless steel strip heated by an alternative current source. The behaviour of the coal particle was recorded at 100 times magnification through an arrangement of a long focal distance microscope attached to a CCD camera. The two different coal types examined (thermal and coking coal) exhibited significant differences during heating. At about 460oC, during the plastic stage, the coking coal showed rapid swelling and formation of bubbles within the liquid. Unlike the coking coal, the thermal coal showed very little swelling, although devolatilisation (predominantly tars for both coals) was taking place. The volatiles were diffusing to the surface of the particle through the pores in the char, without any significant swelling. At temperatures above 600oC, significant shrinking was observed with the coking coal, while in both samples, evolution of hydrogen was monitored. These observations were compared to the measured specific heats for these coals. The specific heats showed significant differences between the samples associated with a very complex behaviour following the onset of softening. While the coking coal exhibited predominantly exothermic reactions coinciding with the observed swelling phenomena, the thermal coal showed a sequence of endothermic and exothermic reactions. The changes in the specific heats also correlated well with the observed evolution of hydrogen (and shrinking for the coking coal) at higher temperatures.
Źródło:
Polish Geological Institute Special Papers; 2002, 7; 253-258
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Phase Diagram and Phonon stability, Electronic and Optical Properties of FeVSb: A DFT study
Autorzy:
Bagheri, A.
Boochani, A.
Masharian, S. R.
Jafarpour, F. H.
Powiązania:
https://bibliotekanauki.pl/articles/2203753.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
DFT
thermodynamic phase diagram
phonon
electronic properties
optical properties
Opis:
Mechanical, electronic, thermodynamic phase diagram and optical properties of the FeVSb half-Heusler have been studied based on the density functional theory (DFT) framework. Studies have shown that this structure in the MgAgAs-type phase has static and dynamic mechanical stability with high thermodynamic phase consistency. Electronic calculations showed that this compound is a p-type semiconductor with an indirect energy gap of 0.39 eV. This compound’s optical response occurs in the infrared, visible regions, and at higher energies its dielectric sign is negative. The Plasmon oscillations have occurred in 20 eV, and its refraction index shifts to zero in 18 eV.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 331--338
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of multigrid parameters in a 3D heat diffusion equation
Autorzy:
de Oliveira, F.
Franco, S. R.
Villela Pinto, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/264346.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda różnic skończonych
metoda Gaussa-Seidela
dyfuzja ciepła
multigrid
finite differences
Poisson 3D
solvers
parameters
Opis:
The aim of this paper is to reduce the necessary CPU time to solve the three-dimensional heat diffusion equation using Dirichlet boundary conditions. The finite difference method (FDM) is used to discretize the differential equations with a second-order accuracy central difference scheme (CDS). The algebraic equations systems are solved using the lexicographical and red-black Gauss-Seidel methods, associated with the geometric multigrid method with a correction scheme (CS) and V-cycle. Comparisons are made between two types of restriction: injection and full weighting. The used prolongation process is the trilinear interpolation. This work is concerned with the study of the influence of the smoothing value (v), number of mesh levels (L) and number of unknowns (N) on the CPU time, as well as the analysis of algorithm complexity.
Źródło:
International Journal of Applied Mechanics and Engineering; 2018, 23, 1; 213-221
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loads on walls and inserts in a mass-flow silos
Autorzy:
Ding, S.
Wójcik, M.
Jecmenica, M.
Silva de, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/1955779.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
silo flow/loads
insert
Lagrangian-Eulerian
adaptive
fillet
Opis:
A finite element analysis has been carried out to investigate flow patterns and loads on silos either with a ralatively steep hopper, or with a shallow hopper but in the presence of an insert. A Lagrangian-Eulerian approach was first adopted to simulate the material flow pattern, with the precondition that mass flow was obtained. It was then attempted to predict the loads exerted by granular materials on the walls of such silos. The load on the insert was also simulated. Techniques such as the adoption of adaptive meshes and filleting along sharp corners were applied in the analysis to overcome the difficulties usually encountered with large deformations in the FEM and the mathematic singularity presented by the abruptness of geometry. Filleting proved to be necessary to bring down the pressure peak at the transition level. The insert took over a significant part of the loads. Comparison with the classic theories have confirmed that the loads predicted on the wall agree quite well with the theoretical results in the silo's cylinder section, but that differences exist in the hopper section; the difference is greater when the hopper is shallower. It has also shown the limitations of predicting flow patterns of granular materials with the traditional elastic-plastic model; a more advanced model is needed.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 4; 525-538
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemistry of siliciclastic rocks from the Shemshak Group (Upper Triassic-Middle Jurassic), northeastern Alborz, northern Iran : implications for palaeoweathering, provenance, and tectonic setting
Autorzy:
Taheri, A.
Jafarzadeh, M.
Armstrong-Altrin, J. S.
Mirbagheri, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/2060454.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Shemshak Group
geochemistry
provenance
palaeoweathering
tectonic setting
Neotethys
Opis:
Combined petrographic and geochemical data of the siliciclastic sedimentary rocks from the Shemshak Group in the northeastern Alborz Mountains, north of Iran are described, together with their implications for palaeoweathering, their provenance, and tectonic setting. Based on field observations and modal composition, the sandstones are classified as litharenites. The chemical index of alteration (CIA) indicated that the source terrains underwent a moderate intensity of chemical weathering. The index of chemical variation (ICV) values indicated that the Shemshak Group rocks were immature and related to a source area with an active tectonic regime. Major, trace and rare earth element (REE) data suggested the domination of mixed sedimentary (recycled) and igneous rocks in the source area of the Shemshak Group. Petrographic and geochemical characteristics of Shemshak Group rocks suggest an active continental margin (ACM), which corresponds to the collision of the Iran plate with the Turan plate.
Źródło:
Geological Quarterly; 2018, 62, 3; 522--535
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and implementation of improved sliding mode controller on 6R manipulator
Autorzy:
Korayem, M. H.
Nekoo, S. R.
Khademi, A.
Abdollahi, F.
Powiązania:
https://bibliotekanauki.pl/articles/280702.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
improved sliding mode control
chattering
DLCC
hardware implementation
Opis:
In this work, we present an improved sliding mode control (ISMC) technique designed and implemented for control of 6R manipulator. Sliding mode control (SMC) is a well-known nonlinear robust method for controlling systems in the presence of uncertainties and disturbances and systems with complex dynamics as in manipulators. Despite this good property, it is difficult to implement this method for the manipulator with a complex structure and more than three degree-of-freedom because of the complicated and massive equation and chattering phenomenon as a property of SMC in control inputs. Here, the chattering phenomenon is eliminated by using an effective algorithm called ISMC and implemented to 6R manipulator by using a low-cost control board based on an ARM microcontroller with high accuracy and memory. The carrying load is considered as the uncertainty for the manipulator, while the dynamic load carrying capacity (DLCC) is considered as a robot performance criterion showing robustness of the controller. The results of simulations and experiments show that the proposed approach has a good performance and is suitable and practical to be applied for manipulators.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 265-280
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Performance of Treatment Train System Incorporated with Nature-Based Materials in Capturing Nutrient for Stormwater Runoff
Autorzy:
Ali, Wafaa
Takaijudin, Husna
Kutty, S. R. M.
Massoudieh, Arash
Powiązania:
https://bibliotekanauki.pl/articles/2086405.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
additive
bioretention
treatment train
coconut
durian
stormwater quality
Opis:
Biofilters, commonly called rain gardens, are becoming increasingly popular among best-management practices (BMPs). They have recently sparked significant interest due to their ability to control stormwater quality. These systems face challenges in manipulating dissolved nitrogen and phosphorus species. This study reports the results of the removal of nitrogen and phosphorus in two modified bioretention systems. The performance of modified bioretention with coconut and durian was compared. The modified bioretention system was evaluated as a single and a series. Sequencing these systems in a series maintained the continuity of nutrient removal. Both series efficiently removed NH3-N (97% in TC5, 95% in TD5), while the removal of NO3-N was moderate (65% inTC5, 67% in TD5). Good removal efficiencies of TP were observed in two series (84% in TC5, 81% in TD5). However, the PO4 removal was equalized in all series (98%). The TN and ON removal were poor and fluctuated with time and column number in TC5, the overall removal efficiencies were (69% and 43%), respectively, while in TD5 a significant fraction of TN and ON were removed (86% and 78%), respectively. As compared with coconut husk, durian peel is considered a promising material that can enhance the water quality in bioretention systems.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 92--101
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical solution for magnetohydrodynamic stagnation point flow and heat transfer over a permeable stretching sheet with chemical reaction
Autorzy:
Rasekh, A.
Farzaneh-Gord, M.
Varedi, S. R.
Ganji, D. D.
Powiązania:
https://bibliotekanauki.pl/articles/279659.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
MHD stagnation point flow
permeable stretching sheet
heat and mass transfer
Optimal Homotopy Asymptotic Method (OHAM)
Opis:
This work deals with the problem of steady two-dimensional magnetohydrodynamic (MHD) stagnation point flow towards a permeable stretching sheet with chemical reaction. The fundamental equations of the boundary layer are transformed into ordinary differential equations, which are then solved analytically using the Optimal Homotopy Asymptotic Method (OHAM). Comparisons are made between the results of the proposed method and the numerical method (fourth-order Runge-Kutta) in solving this problem, and excellent agrement has been observed. Subsequently, effects of different involved parameters on the temperature profiles, concentration profiles, local Nusselt number, local Sherwood number and skin-friction coefficient are presented and discussed in detail.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 3; 675-686
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat and mass transfer effects on MHD flow past an inclined porous plate in the presence of chemical reaction
Autorzy:
Sandhya, A.
Ramana Reddy, G. V.
Deekshitulu, V. S.R.G.
Powiązania:
https://bibliotekanauki.pl/articles/1839806.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
reakcja chemiczna
źródło ciepła
promieniowanie cieplne
chemical reaction
heat source
inclined plate
porous medium
thermal radiation
Opis:
The impact of heat and mass transfer effects on an MHD flow past an inclined porous plate in the presence of a chemical reaction is investigated in this study. An effort has been made to explain the Soret effect and the influence of an angle of inclination on the flow field, in the presence of the heat source, chemical reaction and thermal radiation. The momentum, energy and concentration equations are derived as coupled second order partial differential equations. The model is non-dimensionalized and shown to be controlled by a number of dimensionless parameters. The resulting dimensionless partial differential equations can be solved by using a closed analytical method. Numerical results for pertaining parameters, such as the Soret number (Sr), Grashof number (Gr) for heat and mass transfer, the Schmidt number (Sc), Prandtl number (Pr), chemical reaction parameter (Kr), permeability parameter (K), magnetic parameter (M), skin friction (τ), Nusselt number (Nu) and Sherwood number (Sh) on the velocity, temperature and concentration profiles are presented graphically and discussed qualitatively.
Źródło:
International Journal of Applied Mechanics and Engineering; 2020, 25, 3; 86-102
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient finite element simulation and microstructure evolution of AA2219 weld joint using gas tungsten arc welding process
Autorzy:
Arunkumar, S.
Shrikrishna, A. K.
Paulraj, S.
Devakumaran, K.
Kumar, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/101882.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
AA2219 aluminium alloy
gas tungsten arc welding
finite element simulation
metallurgical characterization
Opis:
In this study we focus on finite element simulation of gas tungsten arc welding (GTAW) of AA2219 aluminum alloy and the behavioral of the microstructure before and after weld. The simulations were performed using commercial COMSOL Multiphysics software. The thermal history of the weld region was studied by initially developed mathematical model. A sweep type meshing was used and transient analysis was performed for one welding cycle. The highest temperature noted was 3568 °C during welding. The welding operation was performed on 200×100×25 mm plates. Through metallurgical characterization, it was observed that a fair copper rich cellular (CRC) network existed in the weld region. A small amount of intermetallic compounds like Al2Cu is observed through the XRD pattern.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 64-73
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation and chemical reaction effects on MHD flow along a moving vertical porous plate
Autorzy:
Reddy, G. V. R.
Reddy, N. B.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265207.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
magnetohydrodynamika
porowatość
promieniowanie cieplne
wymiana ciepła
wymiana masy
reakcja chemiczna
MHD
porous medium
thermal radiation
heat and mass transfer
chemical reaction
Opis:
This paper presents an analysis of the effects of magnetohydrodynamic force and buoyancy on convective heat and mass transfer flow past a moving vertical porous plate in the presence of thermal radiation and chemical reaction. The governing partial differential equations are reduced to a system of self-similar equations using the similarity transformations. The resultant equations are then solved numerically using the fourth order Runge-Kutta method along with the shooting technique. The results are obtained for the velocity, temperature, concentration, skin-friction, Nusselt number and Sherwood number. The effects of various parameters on flow variables are illustrated graphically, and the physical aspects of the problem are discussed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 1; 157-168
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanofluid motion past a shrinking sheet in porous media under the impact of radiation and heat source/sink
Autorzy:
Sharma, R. P.
Jha, A. K.
Gaur, P. K.
Mishra, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/264665.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
magnetohydrodynamika
promieniowanie cieplne
wytwarzanie ciepła
MHD
nanofluid
shrinking surface
thermal radiation
heat generation
porous medium
Opis:
An investigation has been carried out for the MHD 3-dimensional flow of nanofluid over a shrinking sweet saturating a porous media in the presence of thermal radiation and heat generation. Convective boundary conditions for the flow phenomena are used in the present analysis. The governing equations are reduced to ODEs employing suitable similarity transformations. The solutions of formulated differential equations have been attained mathematically by fourth order R-K technique along with the shooting method. The impact of the governing constraints on momentum, heat, and local Nusselt number, are explored. It is noticed that the momentum and heat decrease with raise in the porosity variable, temperature reduces with an enhance in the thermal radiation variable, and temperature enhances with an enhance in the heat source/sink parameter.
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 183-199
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis of a shallow depth metro tunnel: a numerical approach
Analiza stabilności płytkiego tunelu metra z wykorzystaniem metod numerycznych
Autorzy:
Monjezi, M.
Rahmani, B. N.
Torabi, S. R.
Singh, T. N.
Powiązania:
https://bibliotekanauki.pl/articles/219211.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modelowanie numeryczne
gwoździowanie gruntu
drążenie tuneli przy pomocy tarcz
szkody górnicze
osiadanie gruntu
numerical modelling
soil nailing
shield tunnelling
subsidence
Opis:
In this paper, an attempt has been made to use numerical modelling for simulating a long halt in construction process at a shallow depth metro tunnel and investigate the effects of soil nailing to increase the tunnel face strength. Finite difference software FLAC with high applicability in a continuum environment was adopted for this study. The tunnel is being excavated for Tehran metro project. Shield tunnelling with roadheader and back hoe cutting tools is applied in the excavation process. Mohr-Coulomb elasto-plastic constitutive law is considered to model the ground. After two months halting in excavation process, tunnel instability and ground subsidence were recorded in thirteen different monitoring points. Numerical simulation results showed a close approximation (11-16%) between measured and FLAC computed displacements of the tunnel crown in case of unsupported face, which is in close proximity and a proof indicates the reliability of simulation. Also, simulation results exhibit a significant reduction in the ground subsidence and tunnel instability in case of supported face by means of the soil nailing.
W artykule podjęto próbę wykorzystanie metod modelowania numerycznego dla potrzeb symulacji dłuższego przestoju prac związanych z budową płytkiego tunelu metra w celu zbadania skutków wzmacniania gruntu dla zwiększenia wytrzymałości tunelu w części czołowej. W badaniach zastosowano oprogramowanie wykorzystujące metodę różnic skończonych FLAC, do zastosowań w środowisku ciągłym. Wykop tunelu wykonywany jest w ramach budowy metra w Teheranie. Kopanie tunelu odbywa się przy pomocy urządzeń tarczowych do drążenia tuneli oraz urządzeń podsiębiernych do urabiania. Do modelowania gruntu zastosowano model sprężysto-plastyczny Mohra-Coulomba z wykorzystaniem równania konstytutywnego. Po dwumiesięcznym przestoju w pracach budowlanych, zarejestrowano wielkości niestabilności tunelu oraz osiadania gruntu w trzynastu równych punktach pomiarowych. Wyniki symulacji numerycznych wykazały wysoką zbieżność (11-16%) pomiędzy wartościami zmierzonymi a przemieszczeniami obliczonymi przy wykorzystaniu oprogramowania FLAC dla stropu tunelu w niepodpartej części czołowej, co potwierdza wiarygodność wyników symulacji. Ponadto, wyniki symulacji wykazują znaczne zmniejszenie osiadania gruntu i niestabilności tunelu w części czołowej tunelu wzmocnionej przez podbijanie gruntu.
Źródło:
Archives of Mining Sciences; 2012, 57, 3; 535-545
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unsteady MHD heat transfer in Couette flow of water at 4°c in a rotating system with ramped temperature via finite element method
Autorzy:
Reddy, G. J.
Raju, R. S.
Rao, J. A.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265043.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
MHD
Couette flow
heat transfer
FEM
magnetohydrodynamika
przepływ Couette'a
transfer ciepła
Opis:
An unsteady magnetohydromagnetic natural convection on the Couette flow of electrically conducting water at 4°C (Pr = 11.40) in a rotating system has been considered. A Finite Element Method (FEM) was employed to find the numerical solutions of the dimensionless governing coupled boundary layer partial differential equations. The primary velocity, secondary velocity and temperature of water at 4°C as well as shear stresses and rate of heat transfer have been obtained for both ramped temperature and isothermal plates. The results are independent of the mesh (grid) size and the present numerical solutions through the Finite Element Method (FEM) are in good agreement with the existing analytical solutions by the Laplace Transform Technique (LTT). These are shown in tabular and graphical forms.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 1; 145-161
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mutational changes in Delphinium malabaricum (Huth.) Munz.: a potential ornamental plant
Autorzy:
Kolar, F.R.
Ghatge, S.R.
Nimbalkar, M.S.
Dixit, G.B.
Powiązania:
https://bibliotekanauki.pl/articles/1998.pdf
Data publikacji:
2015
Wydawca:
Instytut Ogrodnictwa
Tematy:
Delphinium malabaricum
ornamental plant
mutational change
ethyl methanesulphonate
sodium azide
physical mutagen
gamma-ray
mutation frequency
Źródło:
Journal of Horticultural Research; 2015, 23, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of electric field on dispersion of a solute in an MHD flow through a vertical channel with and without chemical reaction
Autorzy:
Umavathi, J. C.
Kumar, J. P.
Gorla, R. S. R.
Gireesha, B. J.
Powiązania:
https://bibliotekanauki.pl/articles/265686.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
dyspersja Taylora
magnetohydrodynamika
reakcja chemiczna
Taylor dispersion
immiscible fluids
conducting fluid
MHD
chemical reaction
Opis:
The longitudinal dispersion of a solute between two parallel plates filled with two immiscible electrically conducting fluids is analyzed using Taylor’s model. The fluids in both the regions are incompressible and the transport properties are assumed to be constant. The channel walls are assumed to be electrically insulating. Separate solutions are matched at the interface using suitable matching conditions. The flow is accompanied by an irreversible first-order chemical reaction. The effects of the viscosity ratio, pressure gradient and Hartman number on the effective Taylor dispersion coefficient and volumetric flow rate for an open and short circuit are drawn in the absence and in the presence of chemical reactions. As the Hartman number increases the effective Taylor diffusion coefficient decreases for both open and short circuits. When the magnetic field remains constant, the numerical results show that for homogeneous and heterogeneous reactions, the effective Taylor diffusion coefficient decreases with an increase in the reaction rate constant for both open and short circuits.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 3; 683-711
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient soil solarization for weed control in the rain-fed upland rice ecosystem
Autorzy:
Khan, A.R.
Srivastava, R.C.
Ghorai, A.K.
Singh, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/25142.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
environment
soil
ground water
weed competition
crop yield
herbicide
solarization
ecosystem
rainfed upland
weed control
toxic residue
rice
Źródło:
International Agrophysics; 2003, 17, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the cardinal temperatures for germination of four Satureja species growing in Iran
Ocena temperatur głownych kiełkowania czterech gatunków cząbru rosnących w Iranie
Autorzy:
Ketabi, H.Z.
Khazaei, H.R.
Nezami, A.
Aghadaei, S.R.T.
Powiązania:
https://bibliotekanauki.pl/articles/72110.pdf
Data publikacji:
2016
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Opis:
Introduction: Seed germination is a complex physiological process regulated by genetic and environmental factors including temperature, water, oxygen, light and pH. Among them, temperature is one of the most important factors controlling the maximum rate and percentage of diaspore germination. Objective: The aim of the study was to determine the cardinal temperatures (Tb, To, Tc) of four Satureja species growing in Iran. Methods: Seeds of Satureja mutica Fish. et C. A. Mey., S. macrantha C. A. Mey., S. sahandica Bornm and S. bachtiarica Bunge were germinated at nine constant temperatures (from 0 to 40°C) with 5°C intervals. A factorial experiment based on completely randomized design with four replications was applied to determine the cardinal temperatures estimated by three regression models including intersected-lines (ISL), quadratic polynomial (QPN) and five-parameters beta (FPB). Results: The highest germination percentage (GP) occurred at 20°C for S. mutica (86%), S. macrantha (55%), S. sahandica (81%) and S. bachtiarica (89%), but there was no significant difference between 20 and 25oC, except S. sahandica. Germination stopped at 0°C and 40°C. The highest germination rate (GR), the lowest mean germination time (MGT) and time to 50% germination (D50) were obtained at 20–25°C for all species. The GRm for S. bachtiarica was significantly (p≤0.05) higher than for three other species in all temperatures. None of the species did reach to 50% germination at temperatures higher than 30°C. Conclusion: Obtained results revealed the superiority of S. bachtiarica over the other species, v.s. S. macrantha was inferior. FPB and ISL models were most reliable for predicting cardinal temperatures, because of higher R2 value and the lower root mean square error (RMSE). S. macrantha and S. mutica showed the lowest and the highest cardinal temperatures, respectively, in all three models.
Wstęp: Kiełkowanie nasion jest złożonym procesem fizjologicznym regulowanym przez czynniki genetyczne i środowiskowe, w tym temperaturę, wodę, tlen, światło i pH. Wśród nich, temperatura jest jednym z najważniejszych czynników wpływających na maksymalną szybkość i procent kiełkowania diaspor. Cel: W niniejszej pracy określono temperatury główne (Tb, To, Tc) kiełkowania nasion dla czterech gatunków cząbru występujących w Iranie. Metody: Nasiona Satureja mutica Fish. et C. A. Mey., S. macrantha C. A. Mey., S. sahandica Bornm i S. bachtiarica Bunge inkubowano w dziewięciu stałych temperaturach (od 0 do 40°C), w przedziałach co 5°C. Wykonano doświadczenie czynnikowe w układzie całkowicie losowym z czterema powtórzeniami, a dla określenia temperatur głównych zastosowano trzy modele regresji: segmentową regresję liniową (ISL), wielomianu kwadratowego (QPN) oraz regresję pięcioparametrową (FPB). Wyniki: Najwyższy procent kiełkowania (GP)odnotowano w temperaturze 20°C, odpowiednio: u S. mutica (86%), S. macrantha (55%), S. sahandica (81%) i S. bachtiarica (89%). Z wyjątkiem S. sahandica, nie stwierdzono jednak istotnej różnicy między 20 a 25°C. Kiełkowanie ustało w 0°C i w 40°C. Najwyższa zdolność kiełkowania (GR), najkrótszy średni czas kiełkowania (MGT) oraz czas kiełkowania 50% nasion (D50) obserwowano przy 20–25°C u wszystkich gatunków. Zdolność kiełkowania diaspor S. bachtiarica była istotnie (p≤0.05) wyższa niż u trzech pozostałych gatunków we wszystkich analizowanych temperaturach. Żaden z gatunków nie osiągnął 50% kiełkowania w temperaturach wyższych niż 30°C. Wnioski: Uzyskane wyniki pokazały przewagę S. bachtiarica nad innymi gatunkami, a S. macrantha charakteryzowała się najniższymi parametrami opisującymi kiełkowanie. Modele FPB i ISL najdokładniej przewidywały poziom temperatur głównych, ze względu na wyższą wartość współczynnika determinacji R2 i niższą wartość średniej kwadratowej błędów (RMSE). We wszystkich trzech modelach najniższe i najwyższe temperatury główne (Tb, To, Tc) zanotowano odpowiednio u S. macrantha i S. mutica.
Źródło:
Herba Polonica; 2016, 62, 1
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 3620

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