The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Barbara Hutniczak - One of the best experts on this subject based on the ideXlab platform.
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Increasing Pressure on Unregulated Species Due to Changes in Individual Vessel Quotas: An Empirical Application to Trawler Fishing in the Baltic Sea
Marine Resource Economics, 2014Co-Authors: Barbara HutniczakAbstract:Individual vessel quotas (IVQs) established on an important target species are a common tool to regulate fisheries. This article investigates fishermen's behavior in a situation in which a primary output quota is decreasing due to policy restrictions. The findings suggest that vessels respond to such situations by Increasing Pressure on unregulated species, using their spare capacity. This article models fishermen's behavior using a restricted profit function, treating the harvest of regulated species as fixed, while unregulated species are variable outputs. An empirical application is provided for the Polish trawler fleet with permits to harvest IVQ-regulated Atlantic Cod in the Baltic Sea. The results indicate a strong substitute relationship between the cod quota and pelagic species. Derived elasticities of intensity, providing a measure of the impact of a fixed-factor on variable factors, offer strong evidence of Increasing Pressure on pelagic species caused by decreasing quotas.
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Increasing Pressure on unregulated species due to changes in individual vessel quotas an empirical application to trawler fishing in the baltic sea
Marine Resource Economics, 2014Co-Authors: Barbara HutniczakAbstract:ABSTRACT Individual vessel quotas (IVQs) established on an important target species are a common tool to regulate fisheries. This article investigates fishermen's behavior in a situation in which a primary output quota is decreasing due to policy restrictions. The findings suggest that vessels respond to such situations by Increasing Pressure on unregulated species, using their spare capacity. This article models fishermen's behavior using a restricted profit function, treating the harvest of regulated species as fixed, while unregulated species are variable outputs. An empirical application is provided for the Polish trawler fleet with permits to harvest IVQ-regulated Atlantic Cod in the Baltic Sea. The results indicate a strong substitute relationship between the cod quota and pelagic species. Derived elasticities of intensity, providing a measure of the impact of a fixedfactor on variable factors, offer strong evidence of Increasing Pressure on pelagic species caused by decreasing quotas. JEL Code: Q22.
Elena V. Boldyreva - One of the best experts on this subject based on the ideXlab platform.
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Weak Hydrogen Bonds Formed by Thiol Groups in N-Acetyl-l-Cysteine and Their Response to the Crystal Structure Distortion on Increasing Pressure
Journal of Physical Chemistry B, 2013Co-Authors: Vasily S. Minkov, Elena V. BoldyrevaAbstract:The effect of hydrostatic Pressure on single crystals of N-acetyl-l-cysteine was followed at multiple Pressure points from 10–4 to 6.2 GPa with a Pressure step of 0.2–0.3 GPa by Raman spectroscopy and X-ray diffraction. Since in the crystals of N-acetyl-l-cysteine the thiol group is involved in intermolecular hydrogen bonds not as a donor only (bonds S–H···O) but also as an acceptor (bonds N–H···S), Increasing the Pressure does not result in phase transitions. This makes a contrast with the polymorphs of l- and dl-cysteine, in which multiple phase transitions are observed already at relatively low hydrostatic Pressures and are related to the changes in the conformation of the thiol side chains only weakly bound to the neighboring molecules in the structure and thus easily switching over the weak S–H···O and S–H···S hydrogen bonds. No phase transitions occur in N-acetyl-l-cysteine with Increasing Pressure, and changes in cell parameters and volume vs Pressure do not reveal any peculiar features. Neverthele...
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A comparative study of the anisotropy of lattice strain induced in the crystals of DL-serine by cooling down to 100 K, or by Increasing Pressure up to 8.6 GPa. A comparison with L-serine
Zeitschrift Fur Kristallographie, 2006Co-Authors: Elena V. Boldyreva, E.n. Kolesnik, T. N. Drebushchak, Heidrun Sowa, H. Ahsbahs, Yuri V. SeryotkinAbstract:The anisotropy of lattice strain in the crystals of DL-serine (P2 1 /n) on cooling down to 100 K and with Increasing hydrostatic Pressure up to 8.6 GPa was studied by single-crystal X-ray diffraction. In contrast to L-serine undergoing Pressure-induced phase transitions at about 5 and 8 GPa, no phase transitions were observed in DL-serine at least up to 8.6 GPa (the highest Pressure reached in the experiment). The anisotropy of strain in DL-serine on cooling was shown to be radically different from that with Increasing Pressure. The response of the crystal structure of DL-serine to cooling and to Increasing Pressure was considerably different from that of L-serine.
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A comparative study of the anisotropy of lattice strain induced in the crystals of L-serine by cooling down to 100 K or by Increasing Pressure up to 4.4 GPa
Zeitschrift Fur Kristallographie, 2005Co-Authors: Elena V. Boldyreva, E.n. Kolesnik, T. N. Drebushchak, H. Ahsbahs, Jon Ares Beukes, Hans-peter WeberAbstract:The anisotropy of lattice strain in the crystals of L-serine (P212121, at ambient conditions a ¼ 5.615(1) �, b ¼ 8.589(2) �, c ¼ 9.346(2) �) on cooling down to 100 K and with Increasing hydrostatic Pressure up to 4.4 GPa was compared with each other and also with the results previously obtained for the polymorphs of glycine. On cooling, the structure expanded slightly along the crystallographic a-direction, compression along the crystallographic b- and c-directions (normal to the chains of the serine zwitter-ions) was very similar. With increas- ing Pressure, the same structure compressed in all the crystallographic directions, linear strain along c-axis was the largest, linear strain along a-axis - - the smallest, linear compression along the b-axis with Increasing Pressure was slightly larger than that along the a-axis. The different ani- sotropy of lattice strain of the same structure on cooling and under Pressure could be correlated with different response of intermolecular hydrogen bonds to these two scalar actions.
Chirag Sathe - One of the best experts on this subject based on the ideXlab platform.
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release of alkali and alkaline earth metallic species during rapid pyrolysis of a victorian brown coal at elevated Pressures
Fuel, 2003Co-Authors: Chirag Sathe, Junichiro Hayashi, Tadatoshi ChibaAbstract:Possible reaction mechanisms responsible for the release of Na and Mg during pyrolysis at elevated Pressures are described in this paper. In order to evaluate these mechanisms a Victorian brown coal, Loy Yang coal, was pyrolysed in a wire-mesh reactor at Pressures up to 6.1 MPa at a heating rate of 1000 °C s−1. Release of Na and Mg were quantified as functions of temperature and Pressure. The results demonstrated that Increasing Pressure suppresses or promotes release of Na and Mg depending on the combination of Pressure and temperature. The results obtained have been explained qualitatively by the proposed reaction mechanisms. At temperatures of 600 °C and lower, the release of Na and Mg from the pyrolysing coal/char particles, as light carboxylates, other organic salts and/or metals, was controlled by their diffusion through the pore system of the particles and, therefore, was suppressed by Increasing Pressure. At higher temperatures, the release of Na and Mg seems to be affected by the changes in intra-particle mass transfer mechanism due to Increasing Pressure as well as by chemical reactions responsible for the formation of volatile Na and Mg species.
R Khordad - One of the best experts on this subject based on the ideXlab platform.
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Spin-orbit interaction in a quantum pseudodot: Pressure effect
Journal of Computational Electronics, 2014Co-Authors: R KhordadAbstract:In the present work, the Schrödinger equation for a pseudo-dot is solved analytically by using the Laplace transformation. Then, by using the variational procedure, the donor binding energy is calculated with a hydrogenic donor impurity at the center. Finally, the hydrostatic Pressure effect on the spin-orbit interaction and the binding energy is studied. According to the obtained results, it is found that the binding energy increases with Increasing Pressure. The level splitting due to the spin-orbit interaction increases by Increasing Pressure. The splitting decreases with Increasing pseudodot size. The change of spin-orbit interaction energy for a GaAs quantum pseudo-dot is very small due to the Pressure even at very low temperature.
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Pressure effect on spin–orbit interaction in a spherical quantum antidot
Indian Journal of Physics, 2013Co-Authors: R Khordad, N FathizadehAbstract:In the present work, the Schrödinger equation is analytically solved for a GaAs/Ga_1- x Al_ x As spherical quantum antidot with a hydrogenic donor impurity at the center. Then, the effect of Pressure on the spin–orbit interaction and binding energy of the quantum antidot is studied within the effective mass approximation. It is observed that (i) the binding energy increases with Increasing Pressure, (ii) the level splitting increases by Increasing Pressure and (iii) the splitting decreases with Increasing antidot size.
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simultaneous effects of temperature and Pressure on diamagnetic susceptibility of a shallow donor in a quantum antidot
Physica B-condensed Matter, 2012Co-Authors: R Khordad, N FathizadehAbstract:Abstract The effect of temperature and Pressure, simultaneously, on the diamagnetic susceptibility and binding energy of a hydrogenic donor impurity at the center of a GaAs / Ga 1 − x Al x As quantum antidot is studied within the effective mass approximation. For this goal, we first analytically solve the Schrodinger equation to obtain wavefunctions and energy levels. Then, using the electronic states, we can calculate the diamagnetic susceptibility. The results obtained from the present work reveals that (i) the diamagnetic susceptibility increases with Increasing Pressure, (ii) the diamagnetic susceptibility decreases by Increasing temperature, (iii) the value of 〈 r 2 〉 decreases with Increasing Pressure due to the quantum confinement, and (iv) an increase in the Pressure enhances the binding energy for a constant temperature.
Hong Yang - One of the best experts on this subject based on the ideXlab platform.
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china s coal fired power plants impose Pressure on water resources
Journal of Cleaner Production, 2017Co-Authors: Xinxin Zhang, Yu Tang, Xu Zhao, Hong Yang, P W Gerbensleenes, Michelle T H Van VlietAbstract:Coal is the dominant fuel for electricity generation around the world. This type of electricity generation uses large amounts of water, Increasing Pressure on water resources. This calls for an in- ...
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China’s coal-fired power plants impose Pressure on water resources
Journal of Cleaner Production, 2017Co-Authors: Xinxin Zhang, Yu Tang, Xu Zhao, Hong Yang, Junguo Liu, P.w. Gerbens-leenes, Michelle T.h. Van Vliet, Jinyue YanAbstract:Coal is the dominant fuel for electricity generation around the world. This type of electricity generation uses large amounts of water, Increasing Pressure on water resources. This calls for an in- ...
