Готові списки джерел за темами / Polarization-change curve / Статті в журналах
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Статті в журналах з теми "Polarization-change curve"

Автор: Grafiati
Опубліковано: 3 червня 2025
Оновлено: 31 липня 2025

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1

C., P. Ukpaka. "Mathematical model to predict the characteristics of polarization in dielectric materials: The concept of piezoelectrcity and electrostriction." Chemistry International 5, no. 3 (2019): 232–40. https://doi.org/10.5281/zenodo.2525583.

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Анотація:
Model was developed for the prediction of polarization characteristics in a dielectric material exhibiting piezoelectricity and electrostriction based on mathematical equations and MATLAB computer simulation software. The model was developed based on equations of polarization and piezoelectric constitutive law and the functional coefficient &nbsp;of Lead Zirconate Titanate (PZT) crystal material used was 2.3&times;10<sup>-6</sup> m (thickness), the model further allows the input of basic material and calculation of parameters of applied voltage levels, applied stress, pressure, dielectric mate
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2

Soltanova, Natavan, Gunel Mirzaliyeva, RUHENGIZ HUSEYNOVA, Aygun Zeynalova, TOFIG ALIYEV, and Sevinj Dadashova. "ELECTRO RECOVERY OF TELLURUM IONS FROM NON-AQUEOUS N-N DIMETHYLFORMAMIDE ELECTROLYTE." NAKHCHIVAN STATE UNIVERSITY SCIENTIFIC WORKS 1, no. 126 (2024): 112–20. https://doi.org/10.69760/y50gt241.

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The work presents studies of the mechanism of recovery of tellurium ions from non-aqueous N N dimethylformamide. For this, linear and cyclic current-voltage polarization curves have been recorded. The influence on the process of the concentration of tellurium ions, change of potential sweep rate and temperature has been investigated. By recording linear polarization curves, it has been established that the reducing process of tellurium ions is controlled by their diffusion to the cathode surface. The influence of the concentration of its ions in the electrolyte, the rate of change of the poten
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3

Tong, Maosong, Li Li, Weinan Wang, and Yizhong Jiang. "Determining capillary-pressure curve, pore-size distribution, and permeability from induced polarization of shaley sand." GEOPHYSICS 71, no. 3 (2006): N33—N40. http://dx.doi.org/10.1190/1.2195989.

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An appropriate form of induced polarization (IP) acts as a bridge between the structure of a water-saturated core plug and its transport properties. The induced-polarization decay curves of natural rocks can be modeled as a weighted superposition of exponential relaxations. A singular-value decomposition method makes it possible to transform the induced-polarization decay data of the shaley sands into relaxation-time spectrum, defined as plot of weight versus the relaxation-time constant. We measured the induced-polarization decay curves of core samples from a formation of Daqing oil field usi
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4

Ohashi, Takayuki, Rintaro Aoyagi, Masaki Maeda, and Makoto Iwata. "Electrical Properties and Polarization Reversal in (Li,Na)NbO3 Lead-Free Piezoelectric Ceramics." Key Engineering Materials 485 (July 2011): 69–72. http://dx.doi.org/10.4028/www.scientific.net/kem.485.69.

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Анотація:
In this study, the relationships between the electrical properties and polarization switching of lead-free (Li0.06Na0.94)NbO3 (LNN6) ceramics were investigated. The electrical properties of stoichiometric LNN6 did not change with polarization switching. On the other hand, the frequency dependence of the impedance of Na-deficient LNN decreased with polarization switching, and the coupling factor kp, the piezoelecric constant d33 and the dielectric constant ε33T/ε0 decreased with polarization switching. Moreover, the dielectric curve of Na-deficient LNN6 after 10 switchings showed peaks at appro
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5

Li, Ji Dong, Ming Jie Zhang, Yi Yong Wang, and Xin Gang Ai. "Research on Polarization Curve and Anode Discharge Mechanism in Electrolysis Cells for Preparation of Al-Li Alloys." Advanced Materials Research 233-235 (May 2011): 2913–17. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2913.

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At 953K, anodic over voltage by electrolyzing LiCl and Li2CO3 were measured respectively by continuous pulse oscillograph method in a mixture fused salt of LiCl-LiF in a laboratory electrolyte cell and the change of polarization curve obtained was studied as well. According to kinetics of electrode process theory, we calculated and analyzed anode reaction mechanism and reaction rate-determining step. The results indicate that when over voltage entered into the Tafel zone with current density in range of 0.1 to 0.3A·cm-2, electrode reaction of LiCl is controlled by electrochemical polarization
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6

Xu, Wen Dond, and Jing Zhao Li. "Spectrum Comparative Analysis of the Frequency Domain Complex Cole-Cole Mode." Applied Mechanics and Materials 220-223 (November 2012): 2491–94. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.2491.

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Using MATLAB the spectrum comparative analysis was gived between complex Cole-Cole model and basic Cole-Cole model when theirs parameters change. The results show that the complex resistivity curve shape of complex model is limitted by total variation of two same kind parameters of complex model. The variation rule of the curve shape is consistent with basic mode when same kind parameters change. The influent of polarization rate and frequency correlation coefficient is bigger than time constant parameter. The resistivity curve of parallel complex model and series complex model is very similar
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7

Geake, J. E., and M. Geake. "A remote-sensing method for sub-wavelength grains on planetary surfaces by optical polarimetry." Monthly Notices of the Royal Astronomical Society 245, no. 1 (1990): 46. http://dx.doi.org/10.1093/mnras/245.1.46.

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Summary Some optical polarization effects for very fine powders are shown. The well-known curve of polarization versus phase angle is found to change in shape and scale when the grain size is reduced to less than the wavelength; strong negative polarization is found, even for a smooth powder surface of high albedo. The negative peak changes in shape, and its parameters are found to be related to grain size in simple ways. This distinctive shape provides a possible remote-sensing method for detecting subwavelength grains on planetary surfaces.
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8

Ahmadian, Z., I. Danaee, and M. A. Golozar. "Effect of Surface Treatment on Corrosion Resistance of 304 Stainless Steel Implants in Tyrode Solution." Archives of Metallurgy and Materials 59, no. 1 (2014): 25–30. http://dx.doi.org/10.2478/amm-2014-0004.

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Abstract The effect of different surface preparation methods such as mechanical, chemical and electrochemical surface preparation on the formation, stability and deterioration of surface films formed on austenitic 304 stainless steel was investigated in Tyrode’s physiological solution by cyclic polarization curves, AC impedance measurements surface techniques. A hysteresis loop in a cyclic polarization curve was obtained that indicates a delay in repassivation of an existing pit when the potential is scanned cathodically. Electrolytic polishing and ultrasonic cleaning improves corrosion resist
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9

Wang, H. Y., X. K. Zhan, S. C. Wang, and Z. Y. Li. "Q-switching pulse and mode-locked square-wave pulse generated in a fiber ring laser based on nonlinear polarization rotation." Laser Physics 32, no. 11 (2022): 115101. http://dx.doi.org/10.1088/1555-6611/ac9788.

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Abstract We observe anomalous modes including Q-switching pulses and mode-locked square-wave pulses generated in a dual-gain-media fiber ring laser based on nonlinear polarization rotation in a semiconductor optical amplifier. We disclose the evolution process between them, and present in detail the temporal and spectra profiles of the output pulses. We find that the width of the square-wave pulse can be varied continuously from 500 ps to 165 ns by increasing the semiconductor optical amplifier (SOA) current or rotating the polarization controllers in the ring. The width of the pulse varies al
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10

Huang, Kai, Liangchun He, Shuaishuai Wang, Huizheng Li, Yigang Chen, and Haibo Guo. "Study on corrosion resistance of AlCuxNiTiZr multi-principal element alloy films in NaCl solution." AIP Advances 12, no. 4 (2022): 045208. http://dx.doi.org/10.1063/5.0088629.

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The corrosion resistance of multi-principal element alloy (MPEA) films is complex dependent on their composition. The purpose of this paper is to explain the relationship between the corrosion resistance and the Cu content of AlCu xNiTiZr MPEA films. AlCu xNiTiZr films were deposited by magnetron sputtering. Their corrosion resistance in 3.5 wt. % NaCl was studied by potentiodynamic polarization experiment and inductively coupled plasma emission spectroscopy. In this paper, the potentiodynamic polarization curve is analyzed from the perspective of corrosion type and corrosion control. Combined
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11

Penttilä, Antti, Karri Muinonen, Mikael Granvik, et al. "Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact." Planetary Science Journal 5, no. 1 (2024): 27. http://dx.doi.org/10.3847/psj/ad1757.

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Abstract We analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos. We fit empirical polarization phase curve models and statistically confirm the discovery by Gray et al. about the degree of linear polarization of the system decreasing on the impact and remaining altered for at least 30 days post-impact. With numerical simulations of particles in the geometric optics domain, we estimate the dominant size of the particles either in the regolith of Didymos and Dimorphos or in the impa
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12

Jiang, J., W. Jiang, Y. Xu, et al. "A conceptual polarimetry applied in X-ray polarization in the energy range of 10–30 keV." Journal of Instrumentation 17, no. 09 (2022): P09011. http://dx.doi.org/10.1088/1748-0221/17/09/p09011.

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Abstract The lower energy part of the hard X-ray band, 10–30 keV, still remains unexplored for X-ray polarimetry. A photo-electric polarimetry based on a CMOS imaging sensor typed GMAX0505 was proven to be a candidate polarimeter applied in this energy band, the pixel size is 2.5 μm and X-ray detection depth is around 5 μm. Due to a limitation of its pixel shape, the sensors can not give the polarization angle of incoming X-rays directly, but predict the angle by utilizing the asymmetric response at different polarization angle of X-rays. In this study, we construct a simplified sensor based o
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13

Li, Li. "In Situ Testing and X Rays Radiation Effects of Pt/Bi3.15Nd0.85Ti3O12/Pt Ferroelectric Capacitors." Advanced Materials Research 712-715 (June 2013): 293–97. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.293.

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Анотація:
Pt/Bi3.15Nd0.85Ti3O12(BNT)/Pt ferroelectric capacitors were monitored using in situ X-ray irradiation with 10 keV at BL14B1 beamline (Shanghai Synchrotron Radiation Facility). BL14B1 combined with a ferroelectric analyzer enabled measurements in situ of electrical performance. The hysteresis curve (PE) of distortion depended on the polarization during irradiation, but the diffracted intensities of the (117) peak did not change in the beginning. ThePEcurve had a negligible change from 2.09×109Gy to 4.45×109Gy. Finally, bothPrandPr+very rapidly increased, but the intensities of (117) decreased.
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14

Melikian, N. D., C. Magnan, A. A. Karapetian, and J. M. Sarkissian. "Photometric and Polarimetric Observations of AGB and Post AGB Stars." Symposium - International Astronomical Union 209 (2003): 145–46. http://dx.doi.org/10.1017/s0074180900208395.

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Анотація:
Photometric and polarimetric observations of Long-Period Variables (LPVs), carried out at Byurakan Observatory over the last few years, have yielded some interesting results. In particular, one of the important results obtained for Mira type variables is that there is a certain correlation between brightness and polarization: the maximum degree of polarization is midway on the increasing branch of the light curve and in all probability its change has a periodic character. More recently an important result has been obtained for a post AGB star SAO 124414. The polarimetric and photometric observ
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15

Jung, Hakkee. "Impact of Hysteresis Curve on Subthreshold Swing in Ferroelectric FET." Vietnam Journal of Science and Technology 62, no. 1 (2024): 156–69. http://dx.doi.org/10.15625/2525-2518/18627.

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Анотація:
The changes in Subthreshold Swing (SS) were observed for changes in remanent polarization Pr and coercive field Ec, which determine the characteristics of the P-E hysteresis curve of ferroelectric in Ferrolectric FET (FeFET). A multilayer structure of Metal-Ferroelectric-Metal-Insulator-Semiconductor (MFMIS) was used for the junctionless double gate structure. To obtain the SS value, the analytical SS model was used. The ranges of 15≤Pr ≤30 μC/cm2 and 0.8≤Ec≤1.5 MV/cm, which were reasonable in various experiments and did not generate unstable regions in the relationship of drain current and ga
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16

Wei, Ze Fei, Xing Hua Zheng, and Ning Ma. "Characteristics of Electrochemical Machining Passive Films on Stainless Steel S304." Advanced Materials Research 705 (June 2013): 197–202. http://dx.doi.org/10.4028/www.scientific.net/amr.705.197.

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Stainless steel S304 was used as experimental subjects, the influences of current density on the passive film morphology, thickness and removal quantity were studied by quantitative experiments. The effect of electrolyte concentration on polarization curve characteristics of stainless steel S304 was qualitatively analyzed. The results show that the passive film morphologies dandify with increasing current density; passive film thickness increases with increasing current density; the change tendency of removal with the current density is consistent with the theoretical formula.
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17

Somwan, Siripong, Khem Chirapatpimol, Apichart Limpichaipanit, Komsanti Chokethawai, and Athipong Ngamjarurojana. "Optical Interferometric Technique for Induced Strain Ferroelectric Loop Study at Low Frequency." Advanced Materials Research 936 (June 2014): 110–14. http://dx.doi.org/10.4028/www.scientific.net/amr.936.110.

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Анотація:
Michelson interferometric technique was modified in the setup and used to measure very small changes in optical path length for electric field induced-strain phenomena. Induced-strain is established in the sample when the beam of light propagating through the sample surface undergoes a shift in phase, which in turn leads to a change in the intensity of the interference pattern formed where the reference and probing beams recombine. In this work the electric field induced-strain was measured as a function of electric field (s-E loop) and polarization (s-P loop) of PbMg1/3Nb2/3O3 (PMN) and 0.7Pb
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18

Lv, Siqi, Yujian Liang, Xuezhen Zhang, et al. "An Electrochemical Study of the Effect of Sulfate on the Surface Oxidation of Pyrite." Materials 17, no. 21 (2024): 5145. http://dx.doi.org/10.3390/ma17215145.

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Анотація:
Pyrite is one of the most abundant metal sulfide tailings and is susceptible to oxidation, yielding acidic mine drainage (AMD) that poses significant environmental risks. Consequently, the exploration of pyrite surface oxidation and the kinetic influencing factors remains a pivotal research area. Despite the oxidation of pyrite producing a significant amount of sulfate (SO42−), a comprehensive investigation into its influence on the oxidation process is lacking. Leveraging pyrite’s semiconducting nature and the electrochemical intricacies of its surface oxidation, this study employs electroche
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19

Wang, Peichen, Yafei Qu, Xiangfu Meng, et al. "A Strong Magnetic Field Alters the Activity and Selectivity of the CO2RR by Restraining C–C Coupling." Magnetochemistry 9, no. 3 (2023): 65. http://dx.doi.org/10.3390/magnetochemistry9030065.

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Анотація:
As an external field, a magnetic field can change the electrocatalytic activity of catalysts through various effects. Among them, electron spin polarization on the catalyst surface has attracted much attention. Herein, we investigate the sensitive response behavior of a Cu2O nanocubes to an in situ magnetic field. Under a 3 T strong magnetic field, the total transferred electron quantity in IT test (−1.1 VRHE) and the current density in the polarization curve increase by 28.7% and 54.7%, respectively, while the onset potential decreases significantly by 114 mV. Moreover, it was found that prod
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20

Revil, André, Mridul Razdan, Stéphane Julien, et al. "Induced polarization response of porous media with metallic particles — Part 9: Influence of permafrost." GEOPHYSICS 84, no. 5 (2019): E337—E355. http://dx.doi.org/10.1190/geo2019-0013.1.

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Анотація:
We consider a mixture made of dispersed metallic particles immersed into a background material saturated by an electrolyte. Below the freezing temperature (typically 0°C to [Formula: see text]), a fraction of the liquid water in the pore space is transformed into ice, whereas the salt remains segregated into the liquid-pore water solution. Our goal is to understand how freezing affects the complex conductivity (induced polarization) of such mixtures. Complex conductivity measurements (96 spectra) are performed in a temperature-controlled bath equipped with a high-precision impedance meter. We
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21

Zhang, Guan-xi, Li Sun, and Bao-hua Sun. "A Wideband Dual-Polarized Antenna Using Planar Quasi-Open-Sleeve Dipoles for Base Station Applications." International Journal of Antennas and Propagation 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/164392.

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Анотація:
A wideband dual-polarized antenna for WLAN, WiMAX, and LTE base station applications is presented in this paper. The proposed antenna consists of two pairs of orthogonal planar quasi-open-sleeve dipoles along the centerlines, a balanced feeding structure and a square ground plane. The planar quasi-open-sleeve dipole comprises a pair of bowtie-shaped planar dipoles with two parallel curve parasitic elements. The introduced parallel curve parasitic elements change the path of the current of the original bowtie-shaped planar dipoles at high frequencies and hence wideband characteristic is achieve
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22

Gao, Xiao Liu, and Hui Hui Zhang. "Experimental Study of C Band Passive Microwave Remote Sensing of Soil Moisture." Applied Mechanics and Materials 477-478 (December 2013): 624–27. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.624.

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Passive microwave remote sensing is one of the most effective methods for inversing soil moisture. Under the condition of laboratory, firstly, C band microwave radiation was used to achieve the trial of ground-based remote sensing soil moisture, and then regression analysis was carried out according to the data measured, finally, got the C band experience regression model of soil moisture inversion. The results showed that: in the level-off state of soil surface, soil humidity and soil microwave emission rate is linear negative correlation, in the other words, soil microwave emission rate decr
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23

Wang, Lin, Ye-Zhao Yu, Feifei Kou, Kuo Liu, Xinxin Wang, and Bo Peng. "The Study of Unusual Emission from PSR B1859+07 using FAST." Research in Astronomy and Astrophysics 22, no. 4 (2022): 045001. http://dx.doi.org/10.1088/1674-4527/ac4d21.

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Abstract We present simultaneous broad-band radio observations on the abnormal emission mode from PSR B1859+07 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). This pulsar shows peculiar emission, which takes the form of occasional shifts of emission to an early rotational phase and mode change of emission at the normal phase. We confirm all these three emission modes with our data sets, including the B (burst) and Q (quiet) modes of the non-shifted pulses and the emission shift mode with a quasi-periodicity of 155 pulses. We also identify a new type of emission shift ev
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24

Abe, Yousuke, Shinichi Komazaki, Toshiki Mitsueda, and Yutaka Kohno. "Change in Electrochemical Property of 12%Cr Ferritic Steel in 1M-KOH Solution Due to Creep." Advanced Materials Research 89-91 (January 2010): 1–5. http://dx.doi.org/10.4028/www.scientific.net/amr.89-91.1.

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Анотація:
Electrochemical material characterization method was applied to the creep specimens of 12%Cr ferritic steel to evaluate the changes in precipitates during creep. Experimental results revealed that the peak current densities “Ip1” and “Ip2” appeared at specific potentials during anodic polarization curve measurement in 1M-KOH solution. These peak current densities corresponded to the selective dissolution of several kinds of precipitates, respectively. The Ip2, which reflected the amount of M23C6 and Laves phase, increased more siginificantly with creep than thermal aging. On the other hand, th
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25

Spencer, T. W., and H. C. Chi. "Thin‐layer fracture density." GEOPHYSICS 56, no. 6 (1991): 833–43. http://dx.doi.org/10.1190/1.1443101.

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Анотація:
Vertically propagating shear waves reflected from a thin reservoir permeated by a single oriented system of open vertical fractures contain information about the fracture density. The outer perimeter of the hodogram constructed from shear waves polarized in the fast and slow directions in the natural coordinate system is approximately elliptical. The polarization is defined as the angle which the major axis of the ellipse makes with the natural coordinate. Over a range of layer thickness which extends well above and below the tuning frequency, the polarization does not deviate from its value f
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26

Kumar, Vishal, Sridhar Tripathy, Supratik Mukhopadhyay, Nayana Majumdar, and Sandip Sarkar. "An experimental study to understand the physics behind charging-up of Gas Electron Multiplier (GEM)." Journal of Physics: Conference Series 2374, no. 1 (2022): 012002. http://dx.doi.org/10.1088/1742-6596/2374/1/012002.

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Анотація:
Charging-up is a phenomenon observed while working with gaseous ionization detector having dielectric. It is comprised of two processes: the polarization of dielectric due to exposure to high electric field and collection of charges on dielectric surface. Both these charging-up processes affect the gain of the detector as they change the local field configuration around the dielectric. Here, we have studied these effects using experimental techniques for a single GEM detector. It has been observed that due to polarization the gain has increased following a curve similar to charging-up of a cap
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27

Angelini, L., J. P. Osborne, and L. Stella. "The changing soft X-ray light curve of the AM Her system MR Serpentis (PG 1550 + 191)." Monthly Notices of the Royal Astronomical Society 245, no. 4 (1990): 652. http://dx.doi.org/10.1093/mnras/245.4.652.

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Анотація:
Summary We report the first soft X-ray light curves of the AM Her system MR Ser, all obtained within a 4-month interval in 1984. The source was serendipitously detected on three occasions by the EXOSA T low-energy telescope, and one observation was made in which MR Ser was the target. MR Ser was probably in a high optical state throughout, although it was seen at half the previous intensity in the final observation. The folded light curves change remarkably between the different observations. In April the soft X-ray light curve showed a minimum around linear polarization phase ϕ = 0.0, and a l
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28

Cao, Jian, Jie Geng, and Weimin Shen. "Spatial Heterogeneity Analysis of Resource Allocation Efficiency of Sports Venues in China from the Perspective of Polarization Theory." Mobile Information Systems 2022 (September 7, 2022): 1–9. http://dx.doi.org/10.1155/2022/6143771.

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Анотація:
There are not many analyses of the degree of variation in the efficiency of the allocation of sports venues in China. The results show that the allocation efficiency of sports venues in China is very high. The results show that the efficiency of the allocation of sports venues in China generally shows a fluctuating upward trend, with the average efficiency value increasing from 0.7 in 2013 to 0.9 in 2014, and there are significant differences at the three regional levels of East, Central, and West China and at the level of each province and autonomous region. The efficiency of the allocation o
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29

Chiang, Min-Xu, Jaturon Tongpakpanang, and Wen-Kai Kuo. "Phase Measurement of Guided-Mode Resonance Device Using Digital Micromirror Device Gratings." Photonics 8, no. 5 (2021): 136. http://dx.doi.org/10.3390/photonics8050136.

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Анотація:
This paper reports on the measurement system of the phase difference between s- and p-polarization components of the light passing through a guided-mode resonance (GMR) device using a digital micromirror device (DMD) gratings as a digital phase-shifting device. The phase of the non-zeroth order diffraction beams of the grating pattern displayed on the DMD can exhibit a phase change when the grating pattern is shifted. Two nearest different diffraction orders of p-polarized and s-polarized beams can be used as the reference and measurement beams, respectively, and are combined to implement the
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30

Shibukawa, Ryota, Sung-Lin Tsai, Takuya Hoshii, Hitoshi Wakabayashi, Kazuo Tsutsui, and Kuniyuki Kakushima. "Influence of sputtering power on the switching and reliability of ferroelectric Al0.7Sc0.3N films." Japanese Journal of Applied Physics 61, SH (2022): SH1003. http://dx.doi.org/10.35848/1347-4065/ac5db0.

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Анотація:
Abstract The sputtering power dependence of 40 nm thick Al0.7Sc0.3N ferroelectric properties was characterized from 200 to 300 W. X-ray rocking curve revealed higher orientated growth into the c-axis with higher sputtering power. Films formed by high power showed reduced leakage current with a higher breakdown field, enabling one to apply the high field for ferroelectric switching. A high remnant polarization (P r) of 130 μC cm−2 was obtained with a coercive field (E c) of 6 MV cm−1. The switching cycle test revealed a wake-up effect for all the films; increasing the leakage current and modify
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31

Ślęzak, Andrzej, Sławomir Grzegorczyn, Kornelia M. Batko, Wiesław Pilis, and Robert Biczak. "Membrane Transport in Concentration Polarization Conditions: Evaluation of S-Entropy Production for Ternary Non-Electrolyte Solutions." Journal of Non-Equilibrium Thermodynamics 45, no. 4 (2020): 385–99. http://dx.doi.org/10.1515/jnet-2020-0012.

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AbstractA model of the S-entropy production in a system with a membrane which separates non-electrolyte aqueous solutions was presented. The differences between fluxes in non-homogeneous and homogeneous conditions for volume and solute fluxes, respectively, are non-linear functions of the glucose osmotic pressure difference (OPD) in ranges dependent on the initial ethanol OPD. A decrease of ethanol OPD causes a shift of this range into the lower values of glucose OPD; this shift is also observed for negative values of glucose and ethanol OPDs. The coefficient of concentration polarization of t
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32

Saleh, Dawood N. "Response Analysis of Electro-Optic Electric Field Sensor." Tikrit Journal of Engineering Sciences 16, no. 2 (2009): 20–27. http://dx.doi.org/10.25130/tjes.16.2.03.

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In this paper an electric field sensor based on the electro-optical effect in Lithium Niobate crystal is studied. The electro-optically induced polarization modification in crystal has been described and the response analyzed for different crystal lengths and light source wave lengths. The study shows that as the crystal length increased the required electric field to produce a phase-shift equal  is decreased. The responsivity of the sensor for different ranges of the electric field to be measured has been calculated and it is found that the rate of change of the half of the phase shift with
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33

Balalaiev, Oleksandr, Oleksandr Burchak, and Yurii Sierikov. "The impact of mineral impurities on the parameters of the charging and discharging processes in a coal capacitor." IOP Conference Series: Earth and Environmental Science 1491, no. 1 (2025): 012061. https://doi.org/10.1088/1755-1315/1491/1/012061.

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Abstract Subbituminous coal taken as a standard and coal-mineral mixtures with argillite, talc, magnetite, and hematite in concentrations of 4.5 and 9% by mass is used as a dielectric of the measuring capacitor. Mixtures with a higher concentration are charged to a higher voltage in 10 minutes compared to the reference coal samples. During the dielectric polarization, most mixtures in different concentrations are characterized by unpredictable jump- and wave-like fluctuations of the chaotic nature of various durations. A three-exponential dynamic model approximates the families of charge/disch
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34

Masiero, Joseph R., Maxime Devogèle, Isabella Macias, Joahan Castaneda Jaimes, and Alberto Cellino. "The Increasingly Strange Polarimetric Behavior of the Barbarian Asteroids." Planetary Science Journal 4, no. 5 (2023): 93. http://dx.doi.org/10.3847/psj/acd383.

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Abstract Polarization phase-curve measurements provide a unique constraint on the surface properties of asteroids that are complementary to those from photometry and spectroscopy and have led to the identification of the “Barbarian” asteroids as a class of objects with highly unusual surfaces. We present new near-infrared polarimetric observations of six Barbarian asteroids obtained with the WIRC+Pol instrument on the Palomar Hale telescope. We find a dramatic change in polarimetric behavior from visible to near-infrared for these objects, including a change in the polarimetric inversion angle
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35

Sharshira, Essam Mohamed, Ahmed A. Ataalla, Mohamed Hagar, Mohammed Salah, Mariusz Jaremko, and Nader Shehata. "Novel Novolac Phenolic Polymeric Network of Chalcones: Synthesis, Characterization, and Thermal–Electrical Conductivity Investigation." Molecules 27, no. 17 (2022): 5409. http://dx.doi.org/10.3390/molecules27175409.

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Анотація:
A series of novolac phenolic polymeric networks (NPPN) were prepared via an acid-catalyzed polycondensation reaction of formaldehyde with chalcones possessing a p-phenolic OH group. When p-hydroxybenzaldehyde was treated with formaldehyde under the same conditions, a phenolic polymer (PP) was obtained. The resulting polymers were isolated in excellent yields (83–98%). Isolated polymers (NPPN, PP) were characterized using FTIR, TGA, and XRD. The results obtained from the TGA revealed that all prepared phenolic polymers have high thermal stability at high temperatures and can act as thermosettin
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36

CHOI, H. J., J. W. KIM, M. S. CHO, C. A. KIM, and M. S. JHON. "CHARACTERISTICS OF A YIELD STRESS SCALING FUNCTION FOR ELECTRORHEOLOGICAL FLUIDS." International Journal of Modern Physics B 16, no. 17n18 (2002): 2636–42. http://dx.doi.org/10.1142/s0217979202012773.

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Анотація:
The electrorheological (ER) fluids exhibit a drastic change in rheological and electrical properties. Among these properties, yield stress is one of the critical evaluation parameters of the performance of ER devices. The published experimental data of yield dependence on the electric field strength and particle volume fraction are inconsistent due to the time dependence of material properties and measuring conditions. In this paper, we present a universal function, descriptive of the normalized yield stress, via scaling of the applied electric field strength. This scaling equation hybridizes
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37

Liang, Qiuyue, Meng-Xiang Lin, and Mark Trodden. "A test of gravity with Pulsar Timing Arrays." Journal of Cosmology and Astroparticle Physics 2023, no. 11 (2023): 042. http://dx.doi.org/10.1088/1475-7516/2023/11/042.

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Abstract A successful measurement of the Stochastic Gravitational Wave Background (SGWB) in Pulsar Timing Arrays (PTAs) would open up a new window through which to test the predictions of General Relativity (GR). We consider how these measurements might reveal deviations from GR by studying the overlap reduction function — the quantity that in GR is approximated by the Hellings-Downs curve — in some sample modifications of gravity, focusing on the generic prediction of a modified dispersion relation for gravitational waves. We find a distinct signature of such modifications to GR — a shift in
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38

Choi, Jeoung-Sik, Dong-Chul Kim, Hyo-Soon Shin, Dong-Hun Yeo, and Joon-Hyung Lee. "Effects of the Sn4+ Substitution and the Sintering Additives on the Sintering Behavior and Electrical Properties of PLZT." Applied Sciences 12, no. 5 (2022): 2591. http://dx.doi.org/10.3390/app12052591.

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(Pb, La)(Zr, Ti)O3 (PLZT) with antiferroelectric properties can be applied as a capacitor whose capacitance increases in a high electric field. From this, we obtained a high sintering density at 950 °C by adding low-temperature sintering additives, 8.0 wt% of PbO and 2.5 wt% of ZnO, simultaneously to a (Pb0.88, La0.12)(Zr0.86, Ti0.14)O3 composition. The change in electrical characteristics was confirmed in terms of Sn4+ substitution, resulting in no change in the sintering density by Sn4+ substitution. However, as the amount of Sn4+ substitution increases, the dielectric constant gradually dec
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39

Frye, Timothy. "The Perils of Polarization: Economic Performance in the Postcommunist World." World Politics 54, no. 3 (2002): 308–37. http://dx.doi.org/10.1353/wp.2002.0008.

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Perhaps the most striking feature of the postcommunist transformation is the tremendous variation in rates of economic growth across countries. To account for these differences, this article develops an alternative to the J-curve and partial reform views that currently dominate discussions of the politics of economic reform. This approach treats economic performance as a political struggle between excommunist and anticommunist factions engaged in a war of attrition over economic and political resources. Using a pooled time-series analysis of economic growth across twenty-five postcommunist cou
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40

Peng, Xiaodong, Zhanfeng Deng, Xueying Zhao, et al. "Experimental and Analytical Study of a Proton Exchange Membrane Electrolyser Integrated with Thermal Energy Storage for Performance Enhancement." International Journal of Photoenergy 2022 (July 4, 2022): 1–9. http://dx.doi.org/10.1155/2022/7543121.

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To peak carbon dioxide emissions and carbon neutrality, hydrogen energy plays a pivotal role in the energy system dominated by wind power and solar power. The proton exchange membrane (PEM) electrolytic hydrogen production technology has advantages of higher current density, higher hydrogen purity, higher load flexibility, and balanced grid load, becoming one of effective ways to consume renewable energy. Experimental analysis finds that the present PEM electrolyser cannot maintain a stable operating temperature as the input power changes; the polarization curve would distort with the change o
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41

Khamis, E., M. N. Moussa, and A. K. Ibrahim. "Application of the Kinetic–Thermodynamic Model to the Adsorption of Organophosphorus Compounds on to a Steel Surface." Adsorption Science & Technology 15, no. 3 (1997): 173–87. http://dx.doi.org/10.1177/026361749701500304.

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The inhibitive action of organophosphorus derivatives on the dissolution rate of steel in H2SO4 has been determined by gasometry and weight loss methods and then compared to rates measured using the potentiodynamic polarization technique. Additionally, UV spectroscopy was used to study the thermal stability of these compounds in different acid concentrations. An empirical kinetic relationship has been presumed correlating the molecular structure of the inhibitors to their inhibition efficiency. The shape of the adsorption isotherms of the compounds shows that some exhibit one S-shaped curve wh
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42

Jayapalan, Gopalakrishnan, Ganga Agnihotri, and D. M. Deshpande. "Real Time Implementation of Incremental Fuzzy Logic Controller for Gas Pipeline Corrosion Control." Advances in Fuzzy Systems 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/203739.

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A robust virtual instrumentation based fuzzy incremental corrosion controller is presented to protect metallic gas pipelines. Controller output depends on error and change in error of the controlled variable. For corrosion control purpose pipe to soil potential is considered as process variable. The proposed fuzzy incremental controller is designed using a very simple control rule base and the most natural and unbiased membership functions. The proposed scheme is tested for a wide range of pipe to soil potential control. Performance comparison between the conventional proportional integral typ
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43

Liu, Zhimin, Kaiyao Wei, and Yue Pan. "Study on Migration Monitoring Technology of Chromium-Contaminated Site Based on Dual-Frequency Induced Polarization Method." Applied Sciences 13, no. 15 (2023): 8849. http://dx.doi.org/10.3390/app13158849.

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In order to reveal the migration process of chromium-contaminated sites, COMSOL5.6 software was used to build the initial model of the chromium pollution source and analyze the migration change characteristics over time based on the rule of groundwater movement and Convection–Dispersion equation. COMSOL provides fully coupled multiphysics modeling for most engineering fields. The results show that: the permeable layer with a high permeability coefficient during the migration of chromium pollutants has a strong adsorption effect on the heavily polluted part, and it will enhance the lateral diff
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44

Koshiba, Hideto, Keisuke Nagato, Gen Inoue, Morio Tomizawa, Akihisa Tanaka, and Masayuki Nakao. "Design of Pillar-Structured Electrode of Polymer Electrolyte Fuel Cells by Experiment and Simulation of Reaction and Mass Transport." ECS Meeting Abstracts MA2024-02, no. 44 (2024): 3028. https://doi.org/10.1149/ma2024-02443028mtgabs.

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Анотація:
Imparting microstructures into polymer electrolyte membranes is effective in improving the performance of polymer electrolyte fuel cells (PEFCs). A previous study proposed a pillar structure as a microstructure from the viewpoint of proton conductivity [1]. In this study, we focus on the effect of the pillar-structured electrode on the power generation performance. The pillar structure was transferred to the cathode by thermal nanoimprinting using a self-made mold, and the catalyst layer was deposited by air spraying. Four pillar structures with different widths and heights were fabricated. Th
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45

Lindner, Peter, H. Bauer, E. Bühler, J. Hackenberg, Marcus Wegner, and Joerg Ziegler. "Experimental Characterization of the Anisotropic Permeability of a Gas Diffusion Layer and Its Influence on the Functionality of the Proton Exchange Membrane Fuel Cell." ECS Meeting Abstracts MA2025-01, no. 40 (2025): 2107. https://doi.org/10.1149/ma2025-01402107mtgabs.

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Анотація:
Gas diffusion layer (GDL) for proton exchange membrane fuel cells (PEMFCs) must fulfill a complex set of coupled functional requirements, that also depend on stack and catalyst coated membrane (CCM) design as well system operation [1]. One of the requirements that the GDLs must fulfill is the bidirectional transport of gas (Air/H2) and water. In this study, the measurement results of the in-plane and through-plane permeability of air and water are shown as a function of the mechanical load and their effect on the functionality of the PEMFC. It is demonstrated that the measured anisotropy of th
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46

Bayly, C. I., and F. Grein. "Energy maxima in anionic nucleophilic additions to carbonyl groups: The location of a saddle point for the addition of hydride to formaldehyde." Canadian Journal of Chemistry 66, no. 1 (1988): 149–54. http://dx.doi.org/10.1139/v88-023.

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The reaction profile of the anionic nucleophilic addition of hydride to formaldehyde giving methanolate was re-investigated using theoretical ab initio methods. A variety of basis sets (including 4-31G and 6-31G with and without polarization and diffuse functions) were used, and electron correlation calculations were performed at the MP2, MP3, and MP4 levels with geometry optimizations at the MP2 level. Upon the addition of diffuse functions to the basis set, a local energy maximum was introduced into the SCF reaction profile, a major change in the character of the profile compared to the enti
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47

Shaefer, Mark S., Stephen J. Rossi, Timothy R. Mcguire, Larry J. Schaaf, Dean S. Collier, and Robert J. Stratta. "Evaluation of The Pharmacokinetic Interaction Between Cemetidine or Famotidine and Cyclosporine in Healthy Men." Annals of Pharmacotherapy 29, no. 11 (1995): 1088–91. http://dx.doi.org/10.1177/106002809502901102.

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Objective: To investigate the potential interaction between cimetidine or famotidine and cyclosporine in healthy men. Design: All subjects received oral cyclosporine at baseline, after the first week of 1 histamine2 (H2)-blocker, and a third time after a 1-week washout plus 1 week of the second H2-blocker. Blood samples were collected just before each dose of cyclosporine and for up to 36 hours afterward for pharmacokinetic analysis. Setting: A college of pharmacy in a university teaching hospital. Participants: The study population consisted of 8 healthy men at least 19 years of age. Main Out
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48

Perry, Mike L., and Robert M. Darling. "(Invited) Development of a Simple and Rapid Diagnostic for Redox-Flow-Battery Cells." ECS Meeting Abstracts MA2022-02, no. 46 (2022): 1703. http://dx.doi.org/10.1149/ma2022-02461703mtgabs.

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Анотація:
Prof. Robert Savinell has made many important contributions to fuel-cell and flow-battery systems. Both of these systems utilize electrochemical flow cells to either generate or store electricity. Because of this commonality, one can leverage concepts used in one for adoption in the other. An important topic for any electrochemical system is durability. A considerable amount of work has been on this topic with polymer-electrolyte fuel cells (PEFCs); in fact, a textbook devoted to this topic was published over a decade ago [1]. However, despite a recent renaissance in redox-flow-battery (RFB) t
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49

Samoylov, A. V. "Trends in the development of sensor devices based on surface plasmon resonance (Review)." Optoelektronìka ta napìvprovìdnikova tehnìka 56 (December 7, 2021): 5–26. http://dx.doi.org/10.15407/iopt.2021.56.005.

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Анотація:
Trends in the development of modern sensory devices based on surface plasmon resonance (SPR) are considered. The basic principles of construction of SPR sensor are given. For excitation of surface plasmons on the surface of sensitive elements of biosensory, a prism of total internal reflection is used or a dielectric substrate are used. A thin (dozens nm) film of high-conductive metal (mainly gold or silver) is applied to the working surface of the prisms or dielectric substrate. In a typical observation experiment, SPR is measured dependence on the angle of increasing light intensity, reflect
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50

Woelke, Janis Pablo, Alexander Rex, Christoph Eckert, Boris Bensmann, and Richard Hanke-Rauschenbach. "Towards the Prediction of Future Polarization Curves from Operating Data: Machine Learning-Based Investigations for Degradation Modelling of PEM Water Electrolysis Cells." ECS Meeting Abstracts MA2024-02, no. 45 (2024): 3160. https://doi.org/10.1149/ma2024-02453160mtgabs.

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Анотація:
A crucial piece of the puzzle for the long-term success of the cost-effective supply of green hydrogen through electrolysis is the description of the time-dependent degradation behaviour in order to be able to consider this, for example, in predictive maintenance concepts. Without this information, it cannot be guaranteed that customers will be able to fulfil their supply contracts for the agreed amounts of produced hydrogen. For this purpose, knowing the current state-of-health (SoH) and also describing its future development over time play essential roles. However, using conventional methods
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