Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "R.P." wg kryterium: Autor

  Lista filtrów

Dostawca treści

Podbaza

Wyrównaj
Wyświetlanie 1-50 z 3632
Tytuł:
Main measurement and automation nodes of magnetic nanoparticles heater: student project
Autorzy:
Samchenko, R. P
Powiązania:
https://bibliotekanauki.pl/articles/398155.pdf
Data publikacji:
2014
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
magnetic nanoparticles
magnetic losses measurement
amplitude measurement
current control
induction heater
stepwise resonant frequency change
nanocząstki magnetyczne
straty magnetyczne
pomiar amplitudy
sterowanie prądem
nagrzewnica indukcyjna
zmiana częstotliwości
Opis:
At carrying out the experiments to determine the losses for heating of magnetic nanoparticles (MNP) and composites on their basis, which are commonly used in the cancer treatment, it is necessary to reduce the number of manually regulated processes, e.g.: frequency change and resonance adjustment, alternating magnetic field strength amplitude change, as well as the measurements. In present article structural diagram of device for such purposes with improved automation level is presented and circuit engineering solutions for main measurement and automation nodes are proposed. There is an attempt to perform a purely electronic control of current flowing through the heating solenoid coil to adjust the magnetic field strength applied to the MNP sample without using any additional power electronics components.
Źródło:
International Journal of Microelectronics and Computer Science; 2014, 5, 1; 35-40
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody zaplodnienia in vitro
Autorzy:
Piprek, R P
Powiązania:
https://bibliotekanauki.pl/articles/849955.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Tematy:
choroby czlowieka
nieplodnosc
leczenie
zaplodnienie in vitro
metoda GIFT
zaplodnienie pozaustrojowe
metoda FIVET
naprotechnologia
Źródło:
Wszechświat; 2010, 111, 04-06; 102-105
0043-9592
Pojawia się w:
Wszechświat
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Atomic Force Microscopy Imaging of Membrane Proteins
Autorzy:
Gonçalves, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/1539109.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.14.ep
87.64.Dz
Opis:
Atomic force microscopy is a technique particularly adapted to the study of flat objects. The possibility to use it in an aqueous environment makes it a unique tool in biology, providing high resolution structural information of biological membranes. Here we will review atomic force microscopy advances in the study of membrane protein imaging, covering reconstituted proteins in lipid bilayers, native membranes and reviewing function-related imaging and its outcomes.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 408-411
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wplyw form w podlozu na potencjal redoks i wzrost biomasy Azolla filiculoides Lam
Influence of nitrogen forms on redox potential of the nutrient solution and biomass of Azolla filiculoides Lam
Autorzy:
Bennicelli, R P
Powiązania:
https://bibliotekanauki.pl/articles/1401762.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
paprotka wodna
Azolla filiculoides
sinice
Anabaena
biomasa
wzrost roslin
potencjal wzrostu
wykorzystanie
nawozy zielone
azot
azot azotanowy
potencjal redox
water fern
Cyanoprokaryota
biomass
plant growth
plant use
nitrogen
green fertilizer
nitrate nitrogen
redox potential
Opis:
Azolla filiculoides Lam. jest paprotką wodną współżyjącą z azot-wiążącą sinicą Anabaena, która budzi zainteresowania ze względu na możliwość jej wykorzystania w postaci nawozu zielonego. Azolla stała się obiektem badań na całym świecie. Wiedza na temat fizjologicznych i ekologicznych czynników wpływających na wzrost paproci jest istotna w badaniach przyrodniczych ukierunkowanych na jej praktyczne stosowania. Celem tej pracy było zbadanie w warunkach kontrolowanych wpływu różnych form azotu na jego właściwości oksydoredukcyjne (Eh) i przyrost biomasy Azolli, Stwierdzono, że optymalny zakres potencjału redoks wzrostu Azolli zawiera się w przedziale 550-600 mV, a pobór formy azotu azotanowego w podłożu wydaje się być preferowany przez paprotkę w stosunku do azotu wiązanego z atmosfery prze sinicę Anabaenę.
Azolla filiculoides Lam is a floating water fern. It has the ability to fix atmospheric nitrogen through symbiosis willi blue green algae Anabaena, therefore, il is considered an important potential source of nitrogen as green manure. Azolla stimulated many studies in all over the world. Knowledge of the physiological and ecological factors influencing the growth of the fern is therefore essential in order to enhance the azolla practical application. The greenhouse study described in this paper aimed (o evaluate and quantify the influence of different forms of nitrogen on redox potential (Eh) of the solution and Azolla biomass. An optimal redox potential range for growth of Azolla (550-600 mV) was found, and a privileged uptake of nitrate from nutrient solution versus atmosphere fixed nitrogen was observed.
Źródło:
Acta Agrophysica; 2000, 38; 7-14
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forkhead genes and human disease
Autorzy:
Erickson, R P
Powiązania:
https://bibliotekanauki.pl/articles/2041982.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
human disease
forkhead gene
winged helix domain
Axenfeld-Rieger anomaly
lymphedema-distichia
mesodermal development
Źródło:
Journal of Applied Genetics; 2001, 42, 2; 211-221
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal analytical winding size optimization for different conductor shapes
Autorzy:
Wojda, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/140709.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Dowell’s equation
Eddy currents
FEM
inductors
optimization
proximity effect
skin effect
thermal effects
winding losses
Opis:
The aim of this paper is to derive an analytical equations for the temperature dependent optimum winding size of inductors conducting high frequency ac sinusoidal currents. Derived analytical equations are useful designing tool for research and development engineers because windings made of foil, square-wire, and solid-round-wire windings are considered. Temperature dependent Dowell’s equation for the ac-to-dc winding resistance ratio is given and approximated. Thermally dependent analytical equations for the optimum foil thickness, as well as valley thickness and diameter of the square-wire and solid-round-wire windings are derived from approximated thermally dependent ac-to-dc winding resistance ratios. Minimum winding ac resistance of the foil winding and local minimum of the winding ac resistance of the solid-round-wire winding are verified with Maxwell 3D Finite Element Method simulations.
Źródło:
Archives of Electrical Engineering; 2015, 64, 2; 197-214
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wplyw zlokalizowanego stresu tlenowego w glebie na rozwoj korzeni i czesci nadziemnych kukurydzy [ modelowe badania rizotronowe ]
Effect of localized soil oxygen stress on root and shoot development in maize ( a model rhizotrone study)
Autorzy:
Bennicelli, R P
Powiązania:
https://bibliotekanauki.pl/articles/1628361.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
agrofizyka
gleby
kukurydza
system korzeniowy
wzrost roslin
badania modelowe
badania rizotronowe
dynamika rozwoju
powietrze glebowe
aeracja
stres tlenowy
agrophysics
soil
maize
root system
plant growth
model research
development dynamics
soil air
aeration
oxygen stress
Opis:
The aim of the study was to test the usefulness of split rhizotrone technique to investigate the effect of localized soil anoxia on root and shoot developement, using maize as a test plant. The experiment was performed in 6 split rhizotrons enabling differentiation of soil aeration status in each half of the rhizotron by blowing nitrogen or air through them. The rhizotrone consists of two parts (each 16.6 dm3 in volume) inclined with an angle 60°. Each part is constructed of 1 mm thick stainless steel plate with a glass inner wall for root observation and has dimensions 84 cm x 40.5 cm x 5.0 cm. The rhizotrons were filled in with a brown loess soil material (Eutric Camhisol) from Ap horizon (from Eli/6wka, near Lublin). Maize seedlings with the roots splitted between the rhizotrone halves (eukivars KLG 2210 and DEA) were used in the experiments. Until the stress period the soil moisture tension of 20-80 kPa provided good water and air conditions. At a stage of 8 leaves three treatments were applied for a period of 7 days; an oxic control (P/P), a localized anoxia with 50% of the roots in nitrogen treated part (P/A), and a complete anoxia (A/A) with gas nitrogen in both parts. During the stress period diurnal elongation rates of primary roots (by marking positions of the tips each day) as well as distribution of two indicators of soil oxygenation status with depth viz. of oxygen diffusion rate (ODR) and of redox potential (Eh) in soil were measured. Shoot elongation rates were monitored with a potentiometer attached to the youngest leaf. Microscopic photographs of cross- sections of the caps and of apical meristems of primary roots at 400 magnification were made to show the changes in their anatomy due to anoxia. Chemical analysis of the shoots was performed after the stress period. For each cultivar the experiment was repeated three times. The investigations performed allowed the following conclusions to be drown out: 1. The split rhizotrone was shown to be a useful technique to study behaviour of the primary maize roots under localized anoxia conditions. 2. The ODR and Eh distribution with depth showed deterioration of oxygenation status (drop of ODR from control values above 100 |µg m-2 s-1 to the level 30 µg m-2 s-1, decrease of Eh from control values above 550 mV to the level, 300 mV) due to replacement of the soil air with gaseous nitrogen. 3. Root elongation rates under anoxic conditions (both under complete - A/A, and localized - A/P anoxia) were on the level of about 50% of the controle (P/P) during first 4 days and decreased practically to zero by the end of the stress period. In turn, the oxic part of the rhizotrone combined with localized anoxia treatment of the same plant (P/A) exhibited compensation effect and was characterized by stimulation of the root elongation rate up to 80%. This effect was especially distinct after 2-5 days of the stress duration and then tended to decrease. 4Distribution of the root mass in depth under anoxic treatments was characterized by concentration of about 80% of the root mass within first 10 cm of the soil. 5.Microscopic photographs of the root tips showed, under anoxic conditions, shorter meristematic zone, smaller number of mitosis, beginning of aerenchyma formation and dying of the cells at a distance of 1 mm from the root cap. 6.The shoots responded to applying anoxia to both rhizotrone parts by 20% reduction of the growth rate. 7.Both root and shoot elongation rates were correlated also with the temperature. 8.Oxygen deficiency in soil resulted in an increase of exchangeable manganese, what was reflected by its increased concentration in the maize shoots.
Źródło:
Acta Agrophysica; 1994, 03; 3-72
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ekonomiczny cykl życia kolejowych inwestycji infrastrukturalnych
Economical life cycle cost for railway infrastructure investment
Autorzy:
Kozubek R., P.
Powiązania:
https://bibliotekanauki.pl/articles/249654.pdf
Data publikacji:
2008
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
cykl życia inwestycji
inwestycje infrastrukturalne
inwestycje kolejowe
economical life
railway investment
Opis:
Do podstawowych metod oceny efektywności inwestycji rzeczowych, opartych na rachunku dyskontowym, uwzględniajacym zmianę wartości pieniądza w czasie, należą: bieżąca wartość netto (Net Present Value - NPV) oraz wewnętrzna stopa zwrotu (Internal Rate of Return - IRR). Wartości tych miar ewaluacji zależy od wielkości stopy dyskontowej (w przypadku wskaźnika NPV), nakładów inwestycyjnych i innych strumieni kosztów i korzyści generowanych przez inwestycję oraz ich rozłożenie w czasie. Istotne jest więc właściwe uwzględnienie czynnika czasu w rachunku efektywności. Ma on szczególne znaczenie w odniesieniu do inwestycji infrastrukturalnych, w tym również inwestycji w zakresie transportu kolejowego, które charakteryzują się między innymi długim okresem budowy i eksploatacji. Dlatego też przy ocenie efektywności tego typu inwestycji bardzo ważnym zagadnieniem jest sposób określenia długości ekonomicznego cyklu życia inwestycji - okresu przyjętego do obliczeń wskaźników NPV i IRR.
Źródło:
TTS Technika Transportu Szynowego; 2008, 4; 58-63
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koszty operacyjne w rachunku efektywności inwestycji infrastrukturalnych w transporcie kolejowym
The operating costs in calculation of efficiency of rail infrastructure projects
Autorzy:
Kozubek, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/319757.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
koszty operacyjne
inwestycje infrastrukturalne
transport kolejowy
ocena efektywności inwestycji
operating costs
infrastructure investment
rail transport
assessment of effectiveness of investments
Opis:
Artykuł zawiera rozważania dotyczące wytycznych, zaleceń i metodyki szacowania kosztów operacyjnych na potrzeby oceny efektywności inwestycji infrastrukturalnych w transporcie kolejowym. Na tle rozważań teoretycznych przedstawiono zróżnicowane podejścia do szacowania tego strumienia pieniężnego oraz ich wpływ na wskaźniki efektywności finansowej i ekonomicznej inwestycji oraz poziom dofinansowania z funduszy UE.
The paper presents the issues concerning the guidelines and estimation methodology of the operating costs in project appraisal of rail infrastructure investments. On the basis of theoretical deliberations, different approaches to estimating operating costs generated by the project were introduced along with their impact on financial and economic performance indicators and level of EU assistance.
Źródło:
Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński; 2014, 25; 129-142
1640-6818
Pojawia się w:
Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On some properties of grounding nonuniform sets of modal conjunctions
Autorzy:
Katarzyniak, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/908392.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
czynnik poznawczy
komunikacja semantyczna
koniunkcja
cognitive agent
semantic communication
language grounding
conjunction
modality
artificial cognition
Opis:
A language grounding problem is considered for nonuniform sets of modal conjunctions consisting of conjunctions extended with more than one modal operator of knowledge, belief or possibility. The grounding is considered in the context of semiotic triangles built from language symbols, communicative cognitive agents and external objects. The communicative cognitive agents are assumed to be able to observe external worlds and store the results of observations in internal knowledge bases. It is assumed that the only meaning accessible to these agents and assigned to modal conjunctions can be extracted from these internal knowledge bases. Commonsense requirements are discussed for the phenomenon of grounding nonuniform sets of modal conjunctions and confronted with an original idea of epistemic satisfaction relation used to define proper conditions for language grounding. Theorems are formulated and proved to show that the communicative cognitive agents based on the proposed model of grounding fulfill some commonsense requirements given for processing sets of nonuniform modal conjunctions. The main result is that the communicative cognitive agents considered can be constructed in a way that makes them rational and intentional as regards the processing of modal conjunctions and from the human point of view.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2006, 16, 3; 399-412
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study of chemical synthesis of dihydropyrimidine (DHPMS) derivatives by Biginelli Reaction using microwave irradiation and conventional method
Autorzy:
Sonawane, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/411784.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
dihydropyrimidine derivatives
Biginelli reaction
microwave irradiation
conventional method
Opis:
The majority of the drugs on the market today are entirely chemically synthesized in the laboratory. Several scientists had synthesized dihydropyrimidine (DHPMs) derivatives showing a wide spectrum of biological actions as antibacterials, antivirals as well as antitumor agents. This activity is principally due to presence of steriogenic carbon C4 in their structure. The current investigation is comparative study of chemically synthesis of two DHPMs derivatives by Biginelli Reaction using microwave irradiation and conventional method. The synthesis of DHPMs derivative involves a multicomponent reaction (aldehyde derivative, urea /thiourea and 1,3-dicarbonyl compounds) in presence of HCl / NH4Cl as a catalyst. Two derivative viz. 3,4-dihydropyrimidin-2-(1H)-ones and 3,4-dihydropyrimidin-2-(1H)-thiones were synthesized and characterized using IR. The melting points were obtained are 203 °C and 211 °C respectively. Microwave irradiation was easy and gave more yield than conventional method. This study will help to develop easy protocol for the synthesis of many more DHPMs derivative with high yield.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 5; 7-11
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Green synthesis of pyrimidine derivative
Autorzy:
Sonawane, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/412470.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
dihydropyrimidine derivatives
Biginelli reaction
Grindstone chemistry
Opis:
The majority of the drugs on the market today are entirely chemically synthesized in the laboratory. Several scientists had synthesized dihydropyrimidine (DHPMs) derivatives showing a wide spectrum of biological actions as antibacterials, antivirals as well as antitumor agents. This activity is principally due to presence of steriogenic carbon C4 in their structure. The current investigation is study and synthesis of dihydropyrimidinones efficiently and in high yields under mild, solvent free and eco-friendly conditions by using “Grindstone Chemistry Technique” catalyzed by CuCl2•2H2O and Conc. HCl. The obtained products have been identified by comparison with spectral data & their melting points. The synthesis of DHPMs derivative involves a multicomponent reaction (aldehyde derivative, urea /thiourea and 1,3-dicarbonyl compounds) in presence of HCl / NH4Cl as a catalyst. 3,4-dihydropyrimidin-2-(1H)-ones was synthesized and characterized using IR. The melting points was obtained 203 °C.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 2; 64-68
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Study of Chemical Synthesis of Pyrimidine Derivatives by Using Grindstone Chemistry Technique and Conventional Metod
Autorzy:
Sonawane, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/412505.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
dihydropyrimidine derivatives
Biginelli reaction
Grindstone chemistry
Opis:
The majority of the drugs on the market today are entirely chemically synthesized in the laboratory. Several scientists had synthesized dihydropyrimidine (DHPMs) derivatives showing a wide spectrum of biological actions as antibacterials, antivirals as well as antitumor agents. This activity is principally due to presence of steriogenic carbon C4 in their structure. The current investigation is comparative study of chemically synthesis of two DHPMs derivatives by Biginelli Reaction using conventional method and grindstone chemistry technique. The synthesis of DHPMs derivative involves a multicomponent reaction (aldehyde derivative, urea /thiourea and 1,3-dicarbonyl compounds) in presence of HCl / NH4Cl as a catalyst. Two derivative viz. 3,4-dihydropyrimidin-2-(1H)-ones and 3,4-dihydropyrimidin-2-(1H)-thiones were synthesized and characterized using IR. The melting points were obtained are 208 °C and 210 °C respectively. “Grindstone Chemistry Technique” catalyzed by CuCl2•2H2O and Conc. HCl. gave more yield, solvent free and ecofriendly. The obtained products have been identified by comparison with spectral data & their melting points. This study will help to develop easy protocol for the synthesis of many more DHPMs derivative with high field.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 14, 1; 22-27
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact Resistance of Materials for Guards on Cutting Machine Tools - Requirements in Future European Safety Standards
Autorzy:
Mewes, D.
Trapp, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/952750.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
cutting machine tool
guards
impact tests
sheet metal
vision panels
obrabiarki
blachy
cięcie metali
Opis:
Guards on machine tools are meant to protect operators from injuries caused by tools, workpieces, and fragments hurled out of the machine's working zone. This article presents the impact resistance requirements, which guards according to European safety standards for machine tools must satisfy. Based upon these standards the impact resistance of different guard materials was determined using cylindrical steel projectiles. Polycarbonate proves to be a suitable material for vision panels because of its high energy absorption capacity. The impact resistance of 8-mm thick polycarbonate is roughly equal to that of a 3-mm thick steel sheet Fe P01. The limited ageing stability, however, makes it necessary to protect poycarbonate against cooling lubricants by means of additional panes on both sides.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, 6, 4; 507-520
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamika procesow oksydoredukcyjnych w pozywce i w osadzie z udzialem Azolla caroliniana Willd
Autorzy:
Stepniewska, Z
Bennicelli, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/1402594.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
ekosystemy wodne
paprotka wodna
azolla karolinska
Azolla caroliniana
Anabaena
strefa korzeniowa
dyfuzja tlenu
wiazanie azotu
potencjal oksydo-redukcyjny
aquatic ecosystem
water fern
root zone
oxygen diffusion
nitrogen binding
redox potential
Źródło:
Acta Agrophysica; 2001, 53; 159-164
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal Incidence of Mite and Infuence of Pesticidal Application on Orchid Flower Production
Autorzy:
Meena, N.K.
Pal, R.
Pant, R.P.
Medhi, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/66510.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Investigations were carried out in 2010 to determine the influence of abiotic factors on the incidence of the two spotted spider mite; Tetranychus urticae Koch and to determine the influence of pesticides on orchid flower production. Initially, in January, the mite population was very low (1.0 mite/10 cm2 leaf area). The population gradually increased and peaked to 22.98 mites/10 cm2 leaf area in the first fortnight of May along with the rise in temperature and sunshine. Then, the population declined to a low level of 3.43 mites/10 cm2 leaf area in the first fortnight of December. Maximum and minimum temperatures had a significant positive correlation and sunshine had a non-significant positive correlation, whereas relative humidity and rainfall had a non-significant negative correlation with the mite population. Infestation of the two spotted spider mite was more severe in untreated conditions in comparison to the treated ones. The difference was due to various abiotic factors and natural pest infestation occurrence which drastically affected the flower quality and yield. In unprotected conditions, the number of flower spikes/plant (1.90±0.44 spikes), number of flowers/spike (7.35±1.04 flowers), spike length (42.59±5.69 cm), flower spike diameter (5.26±0.66 mm), and flower size (6.27±0.86 cm) was very low. In protected conditions, flower quality and yield were superior than in unprotected conditions i.e. number of flower spike/plant (2.92±0.57 spikes), number of flowers/spike (11.78±1.16 flowers), spike length (57.59±7.35 cm), diameter of flower spikes (9.09±1.01 mm), and flower size (6.73±1.16 cm).
Źródło:
Journal of Plant Protection Research; 2013, 53, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Material parameters of antimonides and amorphous materials for modelling the mid-infrared lasers
Autorzy:
Piskorski, Ł.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/175109.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
material parameters
computer simulation
mid-infrared devices
GaSb-based lasers
Opis:
The proper modelling of semiconductor device operation with full complexity of many interrelated physical phenomena taking place within its volume is possible only when the material parameters which appear in each part of the self-consistent model are known. Therefore, it is necessary to include in calculations the material composition, temperature, carrier concentration, and wavelength dependences in electrical, thermal, recombination and optical models. In this work we present a complete set of material parameters which we obtained basing mostly on the experimental data found in several dozen publications. To refine the number of equations, we restrict the material list to those which are typically used in edge-emitting lasers and vertical-cavity surface-emitting lasers designed for mid-infrared emission.
Źródło:
Optica Applicata; 2016, 46, 2; 227-240
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement Precision Under Repeatability Conditions of a Batch of Sound Power Assessment for Blenders in Reverberation Room
Autorzy:
Costa-Felix, R. P. B.
Powiązania:
https://bibliotekanauki.pl/articles/177133.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metrology
measurement precision
sound power assessment
reverberation room
Opis:
A set of sound power assessments was performed to determine measurement precision in specified conditions by the comparison method in a reverberation room with a fixed position array of six microphones. Six blenders (or mixers) and, complementary, a reference sound source were the noise sources. Five or six sound power calculations were undertaken on each noise source, and the standard deviation (sr) was computed as “measurement precision under repeatability conditions” for each octave band from 125 Hz to 8 kHz, and in dB(A). With the results obtained, values of sr equal 1.0 dB for 125 Hz and 250 Hz, 0.8 dB for 500 Hz to 2 kHz, and 0.5 dB for 4 kHz and 8 kHz. Those can be considered representative as sound power precision for blenders according to the measurement method used. The standard deviation of repeatability for the A-weighted sound power level equals 0.6 dB. This paper could be used for house or laboratory tests to check where their uncertainty assessment for sound power determination is similar or not to those generated at the National Metrology Institute.
Źródło:
Archives of Acoustics; 2016, 41, 3; 591-597
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GaInNAs quantum-well vertical-cavity surface-emitting lasers emitting at 2.33 μm
Autorzy:
Piskorski, Ł.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/199958.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
simulation of a diode-laser operation
QW VCSELs
mid-infrared radiation
dilute nitrides
Opis:
In the present paper, the comprehensive fully self-consistent optical-electrical-thermal-recombination model is used to determine the optimal structure of the possible GaInNAs quantum-well (QW) tunnel-junction (TJ) vertical-cavity surface-emitting lasers (VCSELs) with single-fundamental-mode operation at 2.33 μm wavelength suited for carbon monoxide sensing applications. From among various considered structures, the diode laser with 4-μm TJ and two 6-nm Ga0.15In0.85N0.015As0.985/Ga0.327In0.673As0.71P0.29 QWs has the lowest threshold current and seems to be optimal for the above applications. Higher threshold currents are obtained for Ga0.15In0.85N0.015As0.985/Al0.138 -Ga0.332In0.530As QW structures but the latter can be grown in reactors without P source which are used for fabrication of GaAs-based devices. Both the modelled VCSELs offer a very promising room temperature continuous wave performance and may represent an alternative choice to GaSb-based lasers.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 737-744
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-synchronization in different new chaotic systems via active nonlinear control
Autorzy:
Khan, A.
Prasad, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/229711.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
new chaotic system
anti-synchronization
active nonlinear control
Opis:
In this paper, we discuss anti-synchronization between two identical new chaotic systems and anti-synchronization between another two identical new chaotic systems by active nonlinear control. The sufficient conditions for achieving the anti-synchronization of two new chaotic systems are derived based on Lyapunov stability theory. Numerical simulations are provided for illustration and verification of the proposed method.
Źródło:
Archives of Control Sciences; 2013, 23, 2; 229-242
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The chemistry and synthesis of 1H-indole-2,3-dione (Isatin) and its derivatives
Autorzy:
Sonawane, R.P.
Tripathi, R.R.
Powiązania:
https://bibliotekanauki.pl/articles/411536.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
indole
isatin
NBS-DMSO
Pfitzinger reaction
5-nitro-1H-indole-2,3-dione
2-methylquinoline-4-carboxylic acid
Opis:
Isatins are synthetically versatile substrates, where they can be used for the synthesis of a large variety of heterocyclic compounds. In this, a convenient method has been developed for the conversion of Indoles into Isatins and some heterocyclic derivative were synthesised such as 5- nitro-1H-indole-2,3-dione, 2-methylquinoline-4-carboxylic acid which may be used as raw material for drug synthesis. The general process utilizes the effective method for synthesis of Isatin from Indole is bromination and oxidation with an N-bromosuccinimide-dimethyl sulfoxide reagent. The nitration of Isatin at C-5 takes place by using KNO3, conc. H2SO4, 2-methylquinoline-4-caboxylic acid are usually obtained from pfitzinger reaction.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 7, 1; 30-36
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An extraction of the Isatin from the Couroupita Guianesis (cannon ball tree) and A novel synthesis of the N,N'-(2-oxo-3'H-spiro[indoline-3,2'-[1,3,4]thiadiazole]-3',5'-diyl]diacetamide from the Isatin
Autorzy:
Tripathi, R. R.
Sonawane, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/412432.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Couroupita guianesis
Isatin
thiosemicarbazone
Opis:
Isatins are synthetically versatile substrates, where they can be used for the synthesis of a large variety of Isatins and heterocyclic compounds. In this, the isatin were extracted from the floral material of Couroupita guianesis commonly known as an Cannon ball tree. After that, a novel heterocyclic spiro derivative having an IUPAC name N,N’-(2-oxo-3’H-spiro[indoline-3,2’-[1,3,4] thiadiazole]-3’5’-diyl)diacetamide were synthesized , which may be used as raw material for drug synthesis. A spiro compound N,N’-(2-oxo-3’H-spiro[indoline-3,2’-[1,3,4] thiadiazole]-3’5’-diyl)diacetamide were synthesise by refluxing Isatin And thiosemicarbazone in ethanol and then on heating with acetic anhydride underwent to cyclization into intermediate that on acetylation of the NH and NH2 groups afforded the spiro compound.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 119-125
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Type of Semi-Insulating Materials
Autorzy:
Leon, R. P.
Weber, E. R.
Powiązania:
https://bibliotekanauki.pl/articles/1921578.pdf
Data publikacji:
1992-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.80.Ey
Opis:
The introduction of Cu in InP at 700°C and higher temperatures results in both initially p-type and n-type InP become semi-insulating. It is also observed that thermally stable In-Cu rich precipitates form, that the concentration of deep levels is negligible and that InP:Cu samples exhibit inhomogeneities and anomalous transport behavior. The buried Schottky barrier model is the only model thus far studied which is consistent with these experimental observations. This model has general applicability, and its possible relevance to other semiconductors is examined. The conditions necessary for forming quasi-intrinsic semiconductors by metallic precipitation are discussed.
Źródło:
Acta Physica Polonica A; 1992, 82, 4; 664-669
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CardS4: modal theorem proving on Java smart cards
Autorzy:
Gore, R.P.
Nguyen, P.T.
Powiązania:
https://bibliotekanauki.pl/articles/309413.pdf
Data publikacji:
2002
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
bezpieczeństwo
kod
kryptografia
security of mobile code
modal deduction
Opis:
We describe a successful implementation of a theorem prover for modal logic S4 that runs on a Java smart card with only 512 KBytes of RAM and 32 KBytes of EEPROM. Since proof search in S4 can lead to infinite branches, this is "proof of principle" that non-trivial modal deduction is feasible even on current Java cards. We hope to use this prover as the basis of an on-board security manager for restricting the flow of "secrets" between multiple applets residing on the same card, although much work needs to be done to design the appropriate modal logics of "permission" and "obligations". Such security concerns are the major impediments to the commercial deployment of multi-application smart cards.
Źródło:
Journal of Telecommunications and Information Technology; 2002, 4; 68-80
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender Difference and Emotional Intelligence in Selected Hospitals - A Study
Autorzy:
Sahu, Tapas Lata
Das, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/1192719.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Emotional Intelligence
Gender Difference
Male and Female Employees
Healthcare Organization
Opis:
Emotions in humans are subjective conscious experience characterized by psycho-physiological expressions and behavioral reactions. It may act as tool, if positively identified by complementing and enriching job performance but if negatively understood can ruin feelings and be a disaster. Emotions in healthcare organizations are important to be taken care of because in the service exchange process emotions of both the service provider and the receiver are directly involved. Although caring and curing patient by these employees is a professional activity but still, the empathetic and sympathetic behavior shown by these professionals influences their performance and success in hospital industry. Moreover, the behavior shown by these employees in the workplace is often discriminated on the basis of their gender as it influences the performance of health professionals. Based on above backdrop, the objective of the current study is to assess whether there exist difference in emotional intelligence of healthcare employees in hospitals with respect to their gender. A standardized questionnaire was used to conduct the study among 300 employees in hospitals with the help of scale developed by Hyde, Pethe and Dhar (2002). Data was analyzed through SPSS and results indicated that the level of emotional intelligence among females is higher than male employees.
Źródło:
World Scientific News; 2016, 59; 1-11
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foil Winding Resistance and Power Loss in Individual Layers of Inductors
Autorzy:
Kazimierczuk, M. K.
Wojda, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/226776.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
eddy currents
individual layer winding resistance
inductors
optimal foil thickness
proximity effect
skin effect
winding power loss
Opis:
This paper presents an estimation of high-frequency winding resistance and power loss in individual inductor layers made of foil, taking into account the skin and proximity effects. Approximated equations for power loss in each layer are given and the optimal values of foil thickness for each layer are derived. It is shown that the winding resistance of individual layers significantly increases with the operating frequency and the layer number, counting from the center of an inductor. The winding resistance of each foil layer exhibits a minimum value at an optimal layer thickness. The total winding resistance increases with the total number of layers.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 3; 237-246
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical model of a semiconductor disk laser
Autorzy:
Sokół, A. K.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/174528.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
semiconductor disk laser
SDL
vertical-external-cavity surface-emitting laser
VECSEL
computer simulation
numerical modelling
Opis:
In this paper we describe the numerical model of a semiconductor disk laser, developed and implemented in the Photonics Group, Institute of Physics, Lodz University of Technology, Poland. It consists of four strongly interrelated components for: carrier transport, heat flow, material gain and optical phenomena calculations. Combination of these components gives the steady-state self-consistent model which enables a simulation of various aspects of a semiconductor disk laser operation. A numerical analysis of carrier and power losses within the active region of 1.3-μm GaInNAs/GaAs semiconductor disk laser has been carried out using this model.
Źródło:
Optica Applicata; 2016, 46, 2; 199-211
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Samojezdne opryskiwacze polowe i ich trendy rozwojowe
Self propelled field sprayers and theirs development trends
Autorzy:
Kluza, P.A.
Kluza, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/8839471.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Źródło:
Acta Scientiarum Polonorum. Technica Agraria; 2017, 16, 1-2; 35-46
1644-0684
Pojawia się w:
Acta Scientiarum Polonorum. Technica Agraria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane aspekty budowy i wykorzystania przyczepianych opryskiwaczy polowych
Selected aspects of construction and use of trailed field sprayers
Autorzy:
Kluza, P.A.
Kluza, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/8841925.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Źródło:
Acta Scientiarum Polonorum. Technica Agraria; 2017, 16, 1-2; 23-33
1644-0684
Pojawia się w:
Acta Scientiarum Polonorum. Technica Agraria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emotional Intelligence and Ability to Manage Customer Relationship in Bank Employees of Selected Indian Banks - A Study
Autorzy:
Sahu, Tapas Lata
Das, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/1189944.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Demographic Variables
Emotional Intelligence
Managing Customer Relationships
Opis:
Managing customer relationship is a great challenge in the present era of service revolution. As large numbers of players are now entering into this industry, the intensity of competition is growing among them in very passing day. In the current cut throat competition, customers are becoming very particular to use or not to use services of any organization. Therefore, managing customer relationship is playing dominant role for in almost every service providing organizations, so banks are not an exception. There is a popular belief that higher the emotional intelligence of service provider better will be their ability to manage customer relationship. So the present study is the part of a large study conducted on 300 bank employees working in 5 different banks (both in public and private sector) in the state of Chhattisgarh to assess whether their demographic variables, emotional intelligence and ability to manage customer relationship are related with each other. Data were collected with the help of a schedule to measure emotional intelligence and ability to manage customer relationship and are analyzed with help of ANOVA and Correlations by using SPSS. The study reveals that there exist significant and strong relationship between emotional intelligence, demographic variables and ability to manage customer relationship. Thus, it is concluded that service providers in banks with their high level of emotional intelligence and ability to manage customer relationship can contribute significantly to attract and retain customers and build long term relationship with them.
Źródło:
World Scientific News; 2016, 52; 31-43
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Pumping Beam Width on VECSEL Output Power
Autorzy:
Sokół, A. K.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/226018.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
VECSEL
SDL
semiconductor disk laser
simulation
numerical modeling
power scaling
Opis:
The paper is devoted to a numerical analysis of an influence of a pumping beam diameter on output power of optically pumped vertical-external-cavity surface-emitting lasers. Simulations have been carried out for a structure with a GaInNAs/GaAs active region operating at 1.32 μm. Various assembly configurations have been considered. Results obtained show that laser power scaling is strongly affected by thermal properties of the device.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 3; 239-245
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grounding and extracting modal responses in cognitive agents: 'AND' query and states of incomplete knowledge
Autorzy:
Katarzyniak, R. P.
Pieczyńska-Kuchtiak, A.
Powiązania:
https://bibliotekanauki.pl/articles/907407.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
cognitive agent
semantic communication
language grounding
czynnik poznawczy
komunikacja semantyczna
język programowania
Opis:
In this study an original way of modeling language grounding and generation for a simple set of language responses is presented. It is assumed that the language is used by a cognitive agent and consists of a few modal belief and possibility formulas that are used by this agent to communicate its opinions on the current state of an object. The cognitive agent is asked a simple AND query and the language is tailored to this situation. The agent's knowledge bases are characterized by certain incompleteness of information on the current state of objects. The language of the available responses is originally grounded in the agent's previous empirical experience. According to the assumptions of the cognitive linguistics and the phenomenology of knowledge, this experience is the basic source of meaning represented by the available formulas (responses). In the study the idea of an epistemic satisfaction relation is introduced that describes states of the agent's knowledge in which particular formulas are satisfied in the epistemic sense. Additionally, a formal description of the semantic power of formulas is presented. The concepts of the empirical satisfaction relation and the semantic power of formulas are used to define a model of particular language behavior that preserves the assumption of language grounding. Two examples of possible implementations are given. These implementations are basic ones and refer to statistical characteristics of the stored empirical experience of the cognitive agent.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 249-263
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative studies on the removal of copper (II) by Ulva fasciata activated carbon and commercially activated carbon
Autorzy:
Suresh Jeyakumar, R.P.
Chandrasekaran, V.
Powiązania:
https://bibliotekanauki.pl/articles/778953.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Ulva fasciata sp.
synthetic wastewater
activated carbons
adsorption
Langmuir
Opis:
In this work, the efficiency of Ulva fasciata sp. activated carbons (CCUC, SCUC and SSUC) and commercially activated carbon (CAC) were studied for the removal of Cu (II) ions from synthetic wastewater. Batch adsorption experiments were carried out as a function of pH, contact time, initial copper concentration and adsorbent dose. The percentage adsorption of copper by CCUC, SSUC, SCUC and CAC are 88.47%, 97.53%, 95.78% and 77.42% respectively. Adsorption data were fitted with the Langmuir, Freundlich and Temkin models. Two kinetic models pseudo first order and the pseudo second order were selected to interpret the adsorption data.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 4; 88-94
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new C0 2D FE model based on improved higher order zigzag theory for the analysis of soft core sandwich plate
Autorzy:
Khandelwal, R. P.
Chakrabarti, A.
Bhargava, P.
Powiązania:
https://bibliotekanauki.pl/articles/265624.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
kompozyty
metoda elementów skończonych
płyty
composites
finite element method
plates
soft-core sandwich
Opis:
An efficient C0 continuous finite element (FE) model is developed based on a combined theory (refine higher order shear deformation theory (RHSDT) and least square error (LSE) method) for the static analysis of a soft core sandwich plate. In this (RHSDT) theory, the in-plane displacement field for the face sheets and the core is obtained by superposing a global cubically varying displacement field on a zig-zag linearly varying displacement field with a different slope in each layer. The transverse displacement assumes to have a quadratic variation within the core and it remains constant in the faces beyond the core. The proposed model satisfies the condition of transverse shear stress continuity at the layer interfaces and the zero transverse shear stress condition at the top and bottom of the sandwich plate. The nodal field variables are chosen in an efficient manner to circumvent the problem of C1 continuity requirement of the transverse displacements. In order to calculate the accurate through thickness transverse stresses variation, the Least Square Error (LSE) method has been used at the post processing stage. The proposed combined model (RHSDT and LSE) is implemented to analyze the laminated composites and sandwich plates. Many new results are also presented which should be useful for future research.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 395-423
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adiabatic memories : a review
Autorzy:
Bala, G. J.
Perinbam, J. R. P.
Powiązania:
https://bibliotekanauki.pl/articles/378439.pdf
Data publikacji:
2006
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
Opis:
Adiabatic Logic is a promising approach with respect to power optimization in digital circuit design. In the recent years researches are carried out to design low power memories using this concept. The various adiabatic memories proposed in the recent years are outlined in this paper.
Źródło:
Electron Technology : Internet Journal; 2005-2006, 37/38, 2; 1-4
1897-2381
Pojawia się w:
Electron Technology : Internet Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of GaAs- and GaSb-based active regions emitting in the mid-infrared wavelength range
Autorzy:
Piskorski, Ł.
Frasunkiewicz, L.
Sarzała, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/200684.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
strained QWs
GaInNAs
GaInAsSb
mid-infrared radiation
numerical analysis
napięte konstrukcje QWs
analiza numeryczna
Opis:
In the present paper the results of the computer analysis of the GaAs-based and GaSb-based active regions that can be applied in compact semiconductor laser sources of radiation at mid-infrared wavelengths are presented. Quantum well material contents and strain dependencies on the maximal gain are investigated. It is shown that above 3 μm the maximal gain obtained for GaInNAs/AlGaInAs active region is high only for thick, highly-strained GaInNAs QWs with N concentration higher than 2%. Much higher gain in this wavelength range can be obtained for GaInAsSb/AlGaAsSb active region, which offers relatively high gain even at 4.5 μm when the Sb content in GaInAsSb and compressive strain in this layer are equal to 50% and − 2%, respectively.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 3; 597-603
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydromagnetic rarefied fluid flow over a wedge in the presence of surface slip and thermal radiation
Autorzy:
Das, K.
Sharma, R. P.
Duari, P. R.
Powiązania:
https://bibliotekanauki.pl/articles/264410.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
convective flow
heat transfer
surface slip
magnetic field
thermal radiation
przepływ konwekcyjny
przenoszenie ciepła
pole magnetyczne
promieniowanie cieplne
Opis:
An analysis is presented to investigate the effects of thermal radiation on a convective slip flow of an electrically conducting slightly rarefied fluid, having temperature dependent fluid properties, over a wedge with a thermal jump at the surface of the boundary in the presence of a transverse magnetic field. The reduced equations are solved numerically using the finite difference code that implements the 3-stage Lobatto IIIa formula for the partitioned Runge-Kutta method. Numerical results for the dimensionless velocity and temperature as well as for the skin friction coefficient and the Nusselt number are presented through graphs and tables for pertinent parameters to show interesting aspects of the solution.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 827-837
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic, isotherm and thermodynamics investigation on adsorption of divalent copper using agro-waste biomaterials, Musa acuminata, Casuarina equisetifolia L. and Sorghum bicolor
Autorzy:
Mokkapati, R.P.
Mokkapati, J.
Ratnakaram, V.N.
Powiązania:
https://bibliotekanauki.pl/articles/778519.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
banana bunch-stem powder
casuarinas fruit powder
sorghum stem powder
removal
copper
adsorption
Opis:
Three novel and distinct agricultural waste materials, viz., Casuarinas fruit powder (CFP), sorghum stem powder (SSP) and banana stem powder (BSP) were used as low cost adsorbents for the removal of toxic copper(II) from aqueous solutions. Acid treated adsorbents were characterized by SEM, EDX and FTIR. Different factors effecting adsorption capacity were analyzed and the efficiency order was BSP>SSP>CFP. Based on the extent of compatibility to Freundlich/Langmuir/D-R/Temkin adsorption isotherm and different models (pseudo-first and second order, Boyd, Weber’s and Elovich), chemisorption primarily involved in the case of CFP and SSP, whereas, simultaneous occurrence of chemisorption and physisorption was proposed in the case of BSP. Based on the observations, it was proposed that three kinetic stages involve in adsorption process viz., diffusion of sorbate to sorbent, intra particle diffusion and then establishment of equilibrium. These adsorbents have promising role towards removal of Cu(II) from industrial wastewater to contribute environmental protection.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 2; 68-77
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk factors and patterns related to dental caries evaluated with caries assessment spectrum and treatment (cast) among schoolchildren of Bhubaneswar, India
Autorzy:
Nagarajappa, R.
Naik, D.
Satyarup, D.
Dalai, R.P.
Powiązania:
https://bibliotekanauki.pl/articles/873935.pdf
Data publikacji:
2020
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Objectives. To determine the complete range of carious conditions and furthermore to compare the risk factors and patterns of dental caries amongst schoolchildren aged 12 and 15 years in Bhubaneswar. Material and Methods. Cross-sectional descriptive survey was performed among 800 schoolchildren to assess the dental caries status by Caries Assessment Spectrum and Treatment (CAST) scoring. Chi-square, parametric t-test, one-way ANOVA with post hoc Bonferroni and stepwise multiple linear regression were utilized for statistical analysis. Results. Study population comprised of 476 (59.5%) boys and 324 (40.5%) girls, of which 356 (44.5%) and 444 (55.5%) represented the 12- and 15-years age group respectively. Prevalence of dental caries was 60.6% (Mean 0.38+0.545). Younger age group children presented a significant (p<0.05) lower caries prevalence (54.8%) as against 65.3% in 15 years children. Majority, 189 (23.6%) revealed distinct visual change in enamel (code 3). Acuteness of disease constructed on maximum CAST score for each subject showed that teeth with morbidity (28.5%) is higher followed by reversible pre-morbidity (23.6%) and serious morbidity (6.5%). Predominantly first molars were generally influenced. Significant interpreters in plunging order for DMFT were frequency of cleaning teeth and sweet score. Conclusions. A creative instrument named CAST index describes full continuum of dental caries. Its utilization in epidemiological studies is exceptionally encouraging as it is less tedious and more cost effective. It can possibly be a useful tool for planning caries control programs in both individual and community levels.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2020, 71, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A numerical approach to slip flow of a micropolar fluid above a flat permeable contracting surface
Autorzy:
Parthiban, R.
Palani, G.
Tinker, Seema
Sharma, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/1839882.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
warstwa graniczna
radiator
płyn mikropolarny
ssanie
boundary layers
heat sink
micropolar fluid
slip condition
suction
injection
Opis:
A plain linear penetrable contracting sheet with slip over a micro-polar liquid with a stagnation-point flow is analyzed. Through similarity mapping, the mathematical modeling statements are transformed as ODE’s and numerical results are found by shooting techniques. The varying impacts of physical quantities on the momentum, micro-rotation, and temperature were demonstrated through graphs. The computed measures including shear and couple stress with distinct measures of factors involved in this proposed problem are presented through a table.
Źródło:
International Journal of Applied Mechanics and Engineering; 2021, 26, 2; 173-185
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient free convective radiative flow between vertical parallel plates heated/cooled asymmetrically with heat generation and slip condition
Autorzy:
Gaur, P. K.
Sharma, R. P.
Jha, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/264930.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
magnetohydrodynamika
wytwarzanie ciepła
promieniowanie cieplne
MHD
slip flow
heat generation
thermal radiation
Opis:
Investigation of an MHD convective flow of viscous, incompressible and electrically conducting fluid through a porous medium bounded by two infinite vertical parallel porous plates is carried out. Forchheimer-Brinkman extended Darcy model is assumed to simulate momentum transfer within the porous medium. A magnetic field of uniform strength is applied normal to the plates. The analytical results are evaluated numerically and the presented graphically to discuss in detail the effects of different parameter entering into the problem.
Źródło:
International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 365-384
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase Transitions and Stability of Group IV BCC Metals
Autorzy:
Verma, M. L.
Verma, A.
Rathore, R. P. S.
Powiązania:
https://bibliotekanauki.pl/articles/1968848.pdf
Data publikacji:
1998-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.Dc
Opis:
Born stability criteria were employed in the framework of extended generalised exponential potential to calculate the theoretical strength and range of stability of a perfect uniaxially stressed crystal lattice of group IV bcc metals: titanium, zirconium, and hafnium. The analysis depicts two ranges of stability, a bcc phase and a body centered tetragonal phase. The computed value of theoretical strength and strain of bcc Ti, Zr and Hf agree satisfactorily with the experimental limits. The second-order elastic constants C$\text{}_{11}$ and C$\text{}_{12}$ were also computed.
Źródło:
Acta Physica Polonica A; 1998, 93, 3; 479-489
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 3632

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies