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Tytuł:
ZnO Nanopowders as Chemical Sensor to Malathion Vapor
Autorzy:
Al-Mohammad, A.
Darwich, R.
Rukiah, M.
Abo Shaker, S.
Kakhia, M.
Powiązania:
https://bibliotekanauki.pl/articles/1195948.pdf
Data publikacji:
2014-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.16.Be
84.37.+q
81.20.Ev
81.20.Wk
07.07.Df
Opis:
Thick films of zinc oxide (ZnO) nanopowders have been prepared by high energy ball-milling for various spans of mill time (3-18 h). The morphology and crystal structure of the prepared ZnO powder were characterized by scanning electron microscope and X-ray diffraction. The ZnO thick films were then used to construct a gas sensor for O,O-dimethyl dithiophosphate of diethyl mercaptosuccinate (malathion) at different operating temperatures. The sensor response at 100 ppm of malathion was found to reach a maximum as large as 80 at 6 h of high energy ball-milling, four times larger than that found for ethanol. Scanning electron microscope observation of the granular state and pore size distribution analyses indicated that increasing high energy ball-milling time gave rise especially to an increase in the volume of pores in the pore size range of 6-35 nm. It is suggested that such a change in nanostructure is responsible for the marked promotion of the response to malathion.
Źródło:
Acta Physica Polonica A; 2014, 125, 1; 131-134
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zmiany geometrii i materiału wykończeniowego ościeża na warunki oświetleniowe w pomieszczeniu
The impact of different geometry and finishing material of jambs on indoor light condition
Autorzy:
Szczepańska-Rosiak, E.
Wolak, J.
Powiązania:
https://bibliotekanauki.pl/articles/362623.pdf
Data publikacji:
2016
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
komfort wizualny
ościeże
przegroda zewnętrzna
DF
współczynnik oświetlenia dziennego
DA
autonomia światła dziennego
UDI
wskaźnik użytecznego światła dziennego
visual comfort
jamb
building envelope
daylight factor
daylight autonomy
useful daylight illuminance
Opis:
W artykule przeanalizowano wpływ rozwiązań geometrii ościeża otworu okiennego oraz sposobu jego wykończenia na ilość i jakość światła dziennego dostarczonego do wnętrza. Analizę przeprowadzono dla prostokątnego pomieszczenia, w którym grubość ścian zewnętrznych wynosiła 25 cm oraz 50 cm. Wpływ zmiany grubości ściany, uksztaltowania i wykończenia ościeża na jakość środowiska świetlnego określono na podstawie współczynników DA, DF oraz UDI. wyznaczonych przy użyciu programu komputerowego Daysim. Jak wynika z przedstawionych rezultatów obliczeń odpowiedniemu ukształtowaniu ościeży i użyciu materiałów o wysokiej połyskliwości towarzyszy zwiększenie dostępności promieniowania słonecznego we wnętrzu.
The paper presents analyzes of the effect of different window jamb geometry and its finish material on the quantity and quality of daylight entering into the building interior. The study has been carried out for rectangular space, where its outer wall thickness was 25 cm and 50 cm accordingly. Effect of changes in wall thickness, the shape and the jamb finish material on the daylight quality was determined based on a following factors DA, DF, and UDI. Analyses were done using Daysim software. As follows from the results of calculations, proper shaping of the jamb and using of high gloss materials is accompanied by increasing availability of sunlight in the interior.
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2016, T. 8, nr 3, 3; 33-41
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ sposobów pielęgnacji na poziom plonowania pszenżyta ozimego
The influence of weed control methods on the yield of winter triticale crop
Autorzy:
Hruszka, M.
Powiązania:
https://bibliotekanauki.pl/articles/9284111.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
czynniki plonowania
lan roslin
pszenzyto Bogo
herbicydy
wsiewki
Granstar 75 WG
pszenzyto ozime
plonowanie
metody proekologiczne
graminicydy
odmiany roslin
uprawa roslin
bronowanie
zabiegi pielegnacyjne
Glean 75 DF
zachwaszczenie
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2004, 59, 3; 1023-1028
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ dawki herbicydu Granstar 75 DF na plonowanie pszenżyta ozimego i efektywność rolniczą azotu
Autorzy:
Brzozowski, J.
Brzozowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/47098.pdf
Data publikacji:
2004
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
efektywnosc rolnicza
herbicydy
azot
dawki herbicydow
plonowanie
pszenzyto ozime
zwalczanie chwastow
Granstar 75 DF
herbicide
herbicide dose
nitrogen
weed control
winter triticale
yielding
Źródło:
Acta Scientiarum Polonorum. Agricultura; 2004, 03, 1; 63-70
1644-0625
Pojawia się w:
Acta Scientiarum Polonorum. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
World Financial 2014-2016 Market Bubbles: Oil Negative - US Dollar Positive
Autorzy:
Wątorek, M.
Drożdż, S.
Oświęcimka, P.
Powiązania:
https://bibliotekanauki.pl/articles/1398840.pdf
Data publikacji:
2016-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.60.Ht
89.65.Gh
05.45.Df
Opis:
Based on the log-periodic power law methodology, with the universal preferred scaling factor λ ≈2, the negative bubble on the oil market in 2014-2016 has been detected. Over the same period a positive bubble on the so-called commodity currencies expressed in terms of the US dollar appears to take place with the oscillation pattern which largely is mirror reflected relative to oil price oscillation pattern. It documents recent strong anticorrelation between the dynamics of the oil price and of the USD. A related forecast made at the time of FENS 2015 conference (beginning of November) turned out to be quite satisfactory. These findings provide also further indication that such a log-periodically accelerating down-trend signals termination of the corresponding decreases.
Źródło:
Acta Physica Polonica A; 2016, 129, 5; 932-936
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wave-Particle Duality through a Hydrodynamic Model of the Fractal Space-Time Theory
Autorzy:
Agop, M.
Nica, P.
Harabagiu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1812346.pdf
Data publikacji:
2008-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Df
47.53.+n
03.65.-w
Opis:
Considering that the microparticle movements take place on fractal curves, the wave-particle duality is studied in the fractal space-time theory (scale relativity theory). The Nottale model was extended by assuming arbitrary fractal dimension, $D_F$, of the fractal curves and third-order terms in the equation of motion of a complex speed field. It results that, in a fractal fluid, the convection, dissipation, and dispersion are reciprocally compensating at any scale (differentiable or non-differentiable), whereas a generalized Schrödinger equation is obtained for an irrotational movement of the fractal fluid. The absence of the dispersion implies a generalized Navier-Stokes type equation and the usual Schrödinger equation results for the irrotational movement in $D_F$=2 of the fractal fluid. The absence of dissipation implies a generalized Korteweg-de Vries type equation. In such conjecture, the duality is analyzed through a hydrodynamic formulation. At the differentiable scale, the duality is achieved by the flowing regimes of the fractal fluid, while at the non-differentiable scale, a fractal potential controls, through the coherence, the duality.
Źródło:
Acta Physica Polonica A; 2008, 113, 6; 1571-1588
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water-Sorption Effects near Grain Boundaries in Modified MgO-Al₂O₃ Ceramics Tested with Positron-Positronium Trapping Algorithm
Autorzy:
Klym, H.
Ingram, A.
Shpotyuk, O.
Hadzaman, I.
Chalyy, D.
Powiązania:
https://bibliotekanauki.pl/articles/1030933.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Je
07.07.Df
Opis:
Water-sorption processes near grain boundaries in the MgO-Al₂O₃ ceramics prepared at different temperatures were studied using positron annihilation lifetime spectroscopy. Numerical values of three- and four-component treatment of spectra were used for study of physical- and chemical-sorption processes in the MgO-Al₂O₃ ceramics. To apply mathematical approach in the form of positron-positronium trapping algorithm into three-component treatment of positron annihilation lifetime spectra it was shown that physical-adsorbed water did not modify positron trapping sites near grain boundaries in water-immersed MgO-Al₂O₃ ceramics and localized mainly in nanopores. The chemically-adsorbed water modifies structural extended defects located near grain boundaries that accompanied them by void fragmentation at water desorption.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 864-868
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-Channel Optoelectronic Sensor Employing Cavity Enhanced Absorption Spectroscopy
Autorzy:
Wojtas, J.
Powiązania:
https://bibliotekanauki.pl/articles/1493278.pdf
Data publikacji:
2011-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.07.Df
42.25.Dd
42.55.Px
42.60.Da
42.62.Fi
Opis:
In the paper, a description of two-channel of optoelectronic sensor basing on cavity enhanced absorption spectroscopy is presented. In contrast to the typical cavity enhanced absorption spectroscopy systems, here a special optical system is applied. It provides possibility to direct more than one beam of laser radiation into a cavity. Thus, special lasers controller system and photoreceiver were developed as well. The setup includes two pulsed laser diodes. The optical signals from the lasers are registered with one special constructed photoreceiver, which is characterized by wide range of the detected wavelengths. Moreover, there was applied time division multiplexing technique, well-known in the telecommunication systems. Every laser is assigned to the suitable channel - the strictly determined temporary window. In this window, the signal from the exits of the optical cavity is registered. In the system, optical signal from many laser sources can be measured and value of absorption coefficient at a few different wavelengths can be determined parallel. Typical cavity enhanced absorption spectroscopy system is designed to measure only one gas concentration, while the developed setup provides possibility to detect a trace concentration of two gases at the same time.
Źródło:
Acta Physica Polonica A; 2011, 120, 4; 763-766
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trend Detection in Climate Change Indicators Using Non-Parametric Statistics: A Case Study of Abu Dhabi, United Arab Emirates
Autorzy:
Basarir, A.
Arman, H.
Hussein, S.
Murad, A.
Aldahan, A.
Abdulla Al-Abri, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031779.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
92.70.Kb
92.05.Df
Opis:
This study focuses on detecting trends for climate change indicators, such as average monthly temperature, rainfall, humidity, and wind speed for fourteen stations located between Al Ain and Abu Dhabi cities of the United Arab Emirates. Mann-Kendall non-parametric test was run on monthly time series data for the period 2003-2015 with consideration of seasonality. Significant increasing/decreasing trends in rainfall (for four stations), humidity (for six stations), and wind speed (for nine stations) were detected while no significant trend was observed in temperature for all stations.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 655-657
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Titus 25 DF - interesujacy herbicyd
Autorzy:
Choroszewski, P
Powiązania:
https://bibliotekanauki.pl/articles/834807.pdf
Data publikacji:
1994
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
herbicydy
Titus 25 DF
ochrona roslin
ziemniaki
srodki ochrony roslin
zwalczanie chwastow
herbicide
Titus 25 DF herbicide
plant protection
potato
plant protection product
weed control
Źródło:
Ziemniak Polski; 1994, 4; 14-16
1425-4263
Pojawia się w:
Ziemniak Polski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time-slot based architecture for power beam-assisted relay techniques in CR-WSNs with transceiver hardware inadequacies
Autorzy:
Umer, Mushtaq Muhammad
Jiang, Hong
Zhang, Qiuyun
Manlu, Liu
Muhammad, Owais
Powiązania:
https://bibliotekanauki.pl/articles/27311438.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
cognitive radio WSNs
energy harvesting
DF relaying
relay selection schemes in WSNs
hardware inadequacy in WSNs
wireless sensor networks
zbieranie energii
bezprzewodowa sieć czujników
WSN
sieci radia kognitywnego
przekaz DF
bezprzewodowe sieci sensoryczne
Opis:
Over the past two decades, numerous research projects have concentrated on cognitive radio wireless sensor networks (CR-WSNs) and their benefits. To tackle the problem of energy and spectrum shortfall in CR-WSNs, this research proposes an underpinning decode-&-forward (DF) relaying technique. Using the suggested time-slot architecture (TSA), this technique harvests energy from a multi-antenna power beam (PB) and delivers source information to the target utilizing energy-constrained secondary source and relay nodes. The study considers three proposed relay selection schemes: enhanced hybrid partial relay selection (E-HPRS), conventional opportunistic relay selection (C-ORS), and leading opportunistic relay selection (L-ORS). We present evidence for the sustainability of the suggested methods by examining the outage probability (OP) and throughput (TPT) under multiple primary users (PUs). These systems leverage time switching (TS) receiver design to increase end-to-end performance while taking into account the maximum interference constraint and transceiver hardware inadequacies. In order to assess the efficacy of the proposed methods, we derive the exact and asymptotic closed-form equations for OP and TPT & develop an understanding to learn how they affect the overall performance all across the Rayleigh fading channel. The results show that OP of the L-ORS protocol is 16% better than C-ORS and 75% better than E-HPRS in terms of transmitting SNR. The OP of L-ORS is 30% better than C-ORS and 55% better than E-HPRS in terms of hardware inadequacies at the destination. The L-ORS technique outperforms C-ORS and E-HPRS in terms of TPT by 4% and 11%, respectively.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e146620
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermoelectric properties of Ca₂Sn/Ca₃SnO
Autorzy:
Kalinowski, L.
Fijałkowski, M.
Goraus, J.
Powiązania:
https://bibliotekanauki.pl/articles/1047668.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.15.Jf
66.70.Df
Opis:
We measured thermopower, thermal conductivity and electrical resitivity for Ca₂Sn sample across 4-350 K temperature range. Contrary to expectations from recent DFT based calculations the thermopower is not particularly large, reaching 7 μV at 350 K. The thermoelectric figure of merit renders this material in unmodified form practically unusable for thermoelectric aplications.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 384-386
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Penetration of Gold Nanoparticles into Silicon Dioxide
Autorzy:
Ilkiv, I.
Kotlyar, K.
Amel'chuk, D.
Lebedev, S.
Cirlin, G.
Bouravleuv, A.
Powiązania:
https://bibliotekanauki.pl/articles/1033145.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.23.Pq
61.46.Df
68.08.Bc
Opis:
We report on an experimental study of the thermal annealing processes under air and nitrogen atmospheres of colloidal Au nanoparticles deposited onto SiO₂/Si(100) samples. It was shown that Au nanoparticles during annealing under ambient conditions could penetrate inside silicon dioxide layers forming pores at that their lengths were found to be dependent on the annealing time. The influence of oxygen on the penetration process is discussed. At the same time, the annealing of Au nanoparticles under nitrogen conditions did not result in the formation of pores.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 366-369
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Satellites Orientation Method using a Torque Magnetic Drive
Autorzy:
Korobiichuk, I.
Kachniarz, M.
Nowicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030758.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.55.Ge
04.30.Tv
07.05.Rm
07.07.Df
Opis:
Small values of external perturbation forces made it possible to use a torque magnetic drive as a control system. Today, satellite orientation systems use pulsed-type algorithm for discharge of an angular momentum accumulator. The feasibility of using other algorithms (continuous, continuous-pulsed and algorithm of torque magnetic drive operation using `forecast' models of accumulated angular momentum and geomagnetic field) is not covered and not examined, although each has certain advantages for certain types of satellites and their conditions of operation in space. The article highlights satellites operating conditions in space, considers satellites orientation method using a torque magnetic drive and substantiates the necessity of satellite motion simulation with further establishing a technique for evaluation of orientation system given the effect of permanent magnetic and gravitational fields, the type of discharge of accumulated angular momentum, the height of trajectory and the nature of random perturbations.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 722-724
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The NO₂ Sensing Properties of the Sensors Done with Nano-Tetrapods
Autorzy:
Tulun, F.
Öztürk, S.
Öztürk, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1398786.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.07.-b
81.16.-c
81.10.Fq
07.07.Df
81.10.St
Opis:
In this work we have studied the NO2 sensing properties of the sensors with tetrapods. The tetrapods that were used in the production were obtained by CVD route, and their structural analysis was carried out using SEM, XRD and EDX methods. The sensors were produced by a different method that the one mentioned in our another work, and additional electrical I-V characterization was carried out. As well as in the previous work the sensors were tested for 50 ppm sensitivity, by using computer controlled gas flux system, in NO₂ at 200°C, and in ambient air to model the normal working conditions more closely. It was found that the sensors have a good sensitivity to the NO₂ gas. All of the sensors showed a great reversibility and it was found that the recovery time was perfectly low. After this experiment the same sensors were tested with other different gases for several times. And no other problems in sensing ability were seen.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 797-799
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 170

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