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Wyświetlanie 1-15 z 31
Tytuł:
Hydrocarbons in the Upper Permian PZ1– PZ2 cycles of the Kłodawa Salt Structure, central Poland
Autorzy:
Wolny, Ł.
Czechowski, F
Burliga, S.
Raczyński, P.
Hojniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/191617.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Zechstein Basin
Kłodawa Salt Structure
PZ1–PZ2 rocks
hydrocarbons
biomarkers
maturity
hydrocarbons migration
Opis:
Organic geochemical studies were carried out on the sulphate–shale–carbonate series, representing the upper PZ1 and lower PZ2 sections of the Zechstein cycles in the Kłodawa Salt Structure, located in the central part of the Zechstein Basin, in Poland. Hydrocarbons extracted from the Na1 and Na2 rock salts, the A1g and A2 anhydrites, the Ca2 dolomitic anhydrite and the T2 shale-carbonate rocks were analysed by gas chromatography mass spectrometry (GC-MS). Homological series of the n-alkanes and chained isoprenes indicate the algal nature of the organic matter with the characteristic chemiistry of type II kerogen deposited under anoxic conditions. The molecular composition of other biomarkers (n-alkylbenzenes, steranes) as well as phenenthrene and dibenzothiophene and their methyl derivatives revealed the highest maturity of the hydrocarbons (level of advanced stage of the oil-window zone) in the upper part of the Stinking Shale. In the adjacent beds, a gradual decrease in the maturity of the hydrocarbons was observed both upwards and downwards in the stratigraphic sequence. The main source rock of the hydrocarbons is represented by the Stinking Shale deposits. The observed trend of vertical variation in maturity through the rock profile is explained as resulting from the continuous vertical migration of hydrocarbons, expelled during maturation from the Stinking Shale rocks into the underlying and overlying strata.
Źródło:
Annales Societatis Geologorum Poloniae; 2014, 84, 4; 363-374
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Amorphous Micro-Force Sensor
Autorzy:
Nowicki, M.
Kachniarz, M.
Juś, A.
Charubin, T.
Radzikowska-Juś, W.
Powiązania:
https://bibliotekanauki.pl/articles/1032200.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.10.Pz
75.50.Kj
Opis:
In this paper the innovative method of microforce measurement based on air gap influence on magnetic circuits properties is presented. Magnetic ribbon core with air gap is put under transverse compressive stress perpendicular to the magnetic field direction generated by low-mass calibration weight. Change of the air gap induced by the force acting on the core causes change of its magnetic parameters. The possibility of utilization of various magnetic amorphous materials is investigated. Obtained results indicate a possibility of application of the developed sensor in microforce measurements.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 1180-1182
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Industrial Application of Magnetoelastic Force and Torque Sensors
Autorzy:
Bieńkowski, A.
Szewczyk, R.
Salach, J.
Powiązania:
https://bibliotekanauki.pl/articles/1535213.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.80.+q
07.10.Pz
Opis:
Due to their sensitivity, robustness and the flat shape, the magnetoelastic sensors create new possibilities of industrial applications. This paper presents the results of the field tests of using the magnetoelastic sensors with amorphous alloy ring-shaped cores for ignition detection in locomotive's diesel engines as well as measurements of the torque during the operation of ball valves. Presented results confirm usability of amorphous alloy based, magnetoelastic sensors for specific industrial applications.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 1008-1009
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of Transport Properties of Single Layer Devices Based on the Polyazomethine Thin Films
Autorzy:
Weszka, J.
Domański, M.
Jurusik, J.
Hajduk, B.
Chwastek, M.
Bednarski, H.
Powiązania:
https://bibliotekanauki.pl/articles/1492961.pdf
Data publikacji:
2011-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Ei
73.50.Pz
Opis:
This work reports results of studies on transport properties of single-layer devices based on polyazomethine thin films with different metal electrodes. Recorded I-V characteristics of Au-PPI-Au and Au-PPI-Al structures were analyzed in detail. It appears that I-V characteristics of Au-PPI-Au structures are consistent with the Mott-Gurney law with the mobility value of $2× 10^{-6} cm^2$/(V s). Relatively low current in Au-PPI-Al devices is attributed to high value of the Schottky barrier and/or due to low density of longer conjugated segments in polyazomethine thin films.
Źródło:
Acta Physica Polonica A; 2011, 120, 5; 936-938
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-Bond Force Measured by Means of Scanning Force MicroscopyD
Autorzy:
Lekka, M.
Gryboś, J.
Lekki, J.
Stachura, Z.
Styczeń, J.
Powiązania:
https://bibliotekanauki.pl/articles/2035535.pdf
Data publikacji:
2002-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.Gy
07.10.Pz
Opis:
The aim of this investigation was to determine the adhesion force as a function of calcium dichloride concentration in water. The studies were performed with two surfaces carrying opposite charge in water solution: mica - as a negatively charged surface and glass covered with poly-L-lysine - as a positively charged surface, the latter due to the presence of amino groups. The surfaces were immersed in a CaCl$\text{}_{2}$ solution in the range of concentration varied from 0 to 100 mM. The scanning force microscopy was applied to determine the adhesion force by measurements of the pull-off force. Additionally, the values of the single bond force were estimated basing on the Poisson distribution of the number of binding sites.
Źródło:
Acta Physica Polonica A; 2002, 102, 3; 355-364
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gain Studies on Photoconductors Made on Partly Compensated GaAs
Autorzy:
Riesz, F.
Powiązania:
https://bibliotekanauki.pl/articles/1872925.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.50.Pz
85.60.Gz
Opis:
The gain behavior of GaAs photoconductors realized on the partly compensated channel of a MESFET is studied. The gain versus light power dependence hints at the domination of the bimolecular recombination and the trap-mediated gain, and only a minor role of the surface photovoltaic effect. The possible correlation between dark current and gain mechanism is pointed out.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 373-376
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Zn:Se Ratio on the Properties of Sprayed ZnSe Thin Films
Autorzy:
Öztaş, M.
Bedir, M.
Bakkaloğlu, Ö.
Ormancı, R.
Powiązania:
https://bibliotekanauki.pl/articles/2042122.pdf
Data publikacji:
2005-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.Hf
73.50.Pz
Opis:
The effect of Zn:Se ratio on the photoconducting properties of ZnSe thin films has been studied. The ZnSe thin films have been deposited onto glass substrates by the spray pyrolysis method, the substrate temperature kept at 430ºC using mixed aqueous solutions of ZnCl$\text{}_{2}$ and SeO$\text{}_{2}$ with different Zn:Se ratios. Their electrical, structural, and photoconductivity properties have been studied. The values of optical bandgap have been determined from the absorption spectra.
Źródło:
Acta Physica Polonica A; 2005, 107, 3; 525-534
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and prototype manufacturing of a torque measurement system
Autorzy:
Karayel, D.
Yegin, V.
Powiązania:
https://bibliotekanauki.pl/articles/1068122.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.10.Pz
83.85.Ns
Opis:
In the present day, automobile manufacturers demand a certain torque range from hinges provided by supply industry. However, there are no torque measurement system used by the industry to measure this kind of mechanisms and the available systems cannot meet expectations. The purpose of this study is to design a computer-based torque measurement system and to produce its prototype. This system will be used to measure torque range of the vehicle front hood hinges and to control whether torque value is suitable or not. The developed system is an integrated mechatronic system that contains such subsystems as mechanical, electronic and control system. It is expected that the developed torque measurement system will fill an important gap in the relevant industrial sectors and will find widespread application area.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 272-275
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Fiber Optic Spring
Autorzy:
Yaltkaya, S.
Powiązania:
https://bibliotekanauki.pl/articles/1195019.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Pa
07.10.Pz
Opis:
Optical sensors have attracted considerable attention in recent decades. Springs are used for a large variety of functions in industry including in sensor applications such as the measurement of force, acceleration, vibration, and pressure. In this study, a compression coiled spring and an optical fiber cable were combined to form a new optical fiber spring. The measurement part of the fiber optic spring was constructed by using a 3 dB fiber coupler and a fiber polarization beam splitter/combiner. During the study, a diode laser was used and silicon detectors measured the variations of the polarization state intensity. The spring constant of the optical fiber spring was obtained from decay of the free vibrations and Hooke's law. In conclusion, the new constructed fiber optic spring can be used in some industrial sensor applications.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 635-637
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Temperature and Illumination on the Electrical Characteristics of Nanocrystalline $Cu_2S$ Based Heterojunctions for Photodetector Application
Autorzy:
Soliman, H.
Farag, A.
Saadeldin, M.
Sawaby, K.
Powiązania:
https://bibliotekanauki.pl/articles/1400523.pdf
Data publikacji:
2015-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Ei
73.50.Pz
Opis:
In this work, heterojunctions of $Cu_2S//p-Si$ were prepared by high vacuum thermal evaporation technique and examined as a photodetector structure. The dark current-voltage (I-V) characteristics of the heterojunctions measured at different temperatures ranging from 303 to 373 K were investigated. The predominant conduction mechanisms, series resistance, ideality factor and potential barrier height were determined. The downward curvature at sufficiently large voltages in the I-V characteristics is caused by the effect of series resistance $R_{s}$. The ideality factor obtained from I-V characteristics is larger than unity which can be attributed to the presence of a thin interfacial insulator layer between the metal and semiconductor. The photocurrent properties of the device under reverse bias using various illuminations were also explored for checking the validity of photodetector application of the studied device. The responsivity of light for the device under reverse bias confirms that the $Cu_2S//p-Si$ heterojunctions are valid for photodetector application. Moreover, these results suggest that the fabricated diode can be used for optical sensor applications. The capacitance-voltage characteristics of diode were also investigated at high frequency of 1 MHz.
Źródło:
Acta Physica Polonica A; 2015, 127, 6; 1688-1693
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of Diodes with Poly(3-hexylthiophene) and Polyazomethines Thin Organic Layer
Autorzy:
Bednarski, H.
Gąsiorowski, J.
Domański, M.
Hajduk, B.
Jurusik, J.
Jarząbek, B.
Weszka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1409596.pdf
Data publikacji:
2012-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Ei
73.50.Pz
Opis:
Herein we report results of studies on stability of diodes based on organic semiconductors such as poly (3-hexylthiophene) (P3HT) and soluble derivative of polyazomethine poly(1,4-(2,5-bisoctyloxy phenylenemethylidynenitrilo)-1,4-phenylenenitrilomethylidyne), (BOO-PPI). Both polymers were deposited on glass/ITO substrate with or without covering with blocking layer: poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) and finished with Al back electrode. Prepared devices were studied by monitoring their electrical conductivity under nitrogen atmosphere and ambient air conditions. Under nitrogen atmosphere a marked influence of presence of the blocking layer on the diodes electrical conductivity was revealed. The P3HT diodes prepared without PEDOT:PSS thin film shown quick degradation, whereas presence of these layers stabilizes electrical conductivity in these devices. Inversely, the PPI based diodes without the PEDOT:PSS revealed stable conducting properties, while corresponding diodes with PEDOT:PSS layer showed degradation traces of their conducting properties.
Źródło:
Acta Physica Polonica A; 2012, 122, 6; 1083-1086
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suggestion of New Formulations for Schmidt Hammer and UPV Test Methods for Concrete
Autorzy:
Çavdar, A.
Bingöl, Ş.
Powiązania:
https://bibliotekanauki.pl/articles/1219580.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
06.60.Mr
07.10.Pz
Opis:
The concrete is the most widely used building material in Turkey. Especially reinforced concrete dominates at building sector. Because of concrete is an non-homogeneous and non-isotropic material, the strength of concrete cannot be accurately achieved at the site. To control the mechanical properties of concrete in the site, non-destructive test methods can be used. They are useful for having no damage on concrete, however these test results sometimes gives deceptive results. In this study, two of non-destructive test methods, Schmidt hammer testing and ultrasonic pulse velocity methods were used for determining concrete compressive strength. 101 samples were poured concrete cube dimensions 150 × 150 × 150 $mm^3$. On 28th days, firstly, the samples were applied Schmidt hammer test and ultrasonic pulse velocity test and then the compressive strength of these samples was measured by breaking in the press, destructive method. Thus, the new formulations are obtained for Schmidt hammer test and ultrasonic pulse velocity test.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 402-404
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Transient Photocurrent in Organic Semiconductors Incorporating the Annihilation of Excitons on Charge Carriers
Autorzy:
Głowienka, D.
Szmytkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1033869.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.35.-y
73.50.-h
73.50.Pz
Opis:
The role of the annihilation of excitons on charge carriers has been theoretically investigated in organic semiconductors. We have developed the numerical drift-diffusion model by incorporation terms which describe the annihilation process. The transient photocurrent has been calculated for different injection barrier heights, exciton mobilities, and annihilation rate constants. We have demonstrated that the annihilation has a great influence on the range and the rising time of the photocurrent.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 397-400
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and electrical properties of electrodeposited single junction of cuprous (I) oxide-copper
Autorzy:
Rówiński, E.
Pławecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1075639.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
73.50.Pz
73.40.Sx
Opis:
Cuprous (I) oxide (Cu₂O)-based solar cells were fabricated with the use of the electrodeposition technique at nanometre-scale, and the structural, morphological and electrical properties were investigated. The Cu₂O layers were electrodeposited on crystalline and polycrystalline copper substrates. To complete the Cu₂O/Cu(100) and Cu₂O/Cu interfaces as the solar cells the top electrodes of silver paste were painted on the rear of Cu₂O. The microscopic analysis exhibits uneven surface morphologies of a Cu₂O film with the roughness of 92.5 nm, while the X-ray diffraction analysis reveals that the layers are Cu₂O-type polycrystalline structures with the thickness of 493 nm and the crystallite size of 69.8(6) nm. The theoretical analysis of the current-voltage curve was provided to determine the values of electrical parameters of the most efficient solar cell of Ag/Cu₂O/Cu(100) and clearly indicate presence of two Schottky barriers at interfaces.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 1141-1143
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Transitions between Confined and Unconfined States in p-Type Asymmetric GaAs/InGaAs/AlGaAs QW Structures
Autorzy:
Sitarek, P.
Ryczko, K.
Misiewicz, J.
Reuter, D.
Wieck, A.
Powiązania:
https://bibliotekanauki.pl/articles/1492827.pdf
Data publikacji:
2011-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.50.Pz
78.66.Fd
78.67.De
Opis:
We present contactless surface photovoltage spectroscopy and photoreflectance studies of 10 nm wide, p-type doped asymmetric GaAs/InGaAs/AlGaAs quantum well structures. The MBE grown structures differ in spacer thickness between the quantum well and the reservoir of holes. The doping causes that quantum well is placed in electric field. The surface photovoltage spectroscopy measurements gave us detailed information about the optical transitions between confined states and between confined and unconfined states. The comparison of experimental and numerical analysis allows us to identify all features present in the surface photovoltage spectroscopy and photoreflectance spectra. It has been found that spacer layer thickness has significant influence on surface photovoltage spectroscopy spectra.
Źródło:
Acta Physica Polonica A; 2011, 120, 5; 849-851
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 31

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