The formation and dynamics of spatially extended compositional domains in multicomponent lipid membranes both in vivo and in vitro lie at the heart of many important biological and biophysical phenomena. While the the...
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The formation and dynamics of spatially extended compositional domains in multicomponent lipid membranes both in vivo and in vitro lie at the heart of many important biological and biophysical phenomena. While the thermodynamic basis for domain formation has been explored extensively in the past, the roles of membrane and exterior fluid hydrodynamics on domain formation kinetics have received less attention. A case in point is the impact of hydrodynamics on the dynamics of compositional heterogeneities in lipid membranes in the vicinity of a critical point. In this Rapid Communication it is argued that the asymptotic dynamic behavior of a lipid membrane system in the vicinity of a critical point is strongly influenced by hydrodynamic interactions. More specifically, a mode-coupling argument is developed which predicts a scaling behavior of lipid transport coefficients near the critical point for both symmetric and asymmetric bilayers immersed in a bulk fluid.
The transient responses of the vertical axis wind turbines (VAWT) are influenced by the abrupt change of the natural wind velocity, although these are not sensitive to the change of the wind direction. The basic trans...
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ISBN:
(纸本)9781615677467
The transient responses of the vertical axis wind turbines (VAWT) are influenced by the abrupt change of the natural wind velocity, although these are not sensitive to the change of the wind direction. The basic transient response of a wind turbine in the abrupt change of the wind velocity is analyzed experimentally using a special wind tunnel that generates the flow with step like velocity increase. The wind turbine has a rotor with 4 straight blades of NACA 0015 symmetry aerofoil. A series of experiments was accomplished in the uniform flow with instantaneous increased velocity from V0 to V 1 (V01), under the two kind of conditions of the wind turbine, that is, a constant rotational speed and a constant load torques. In the experiments, the initial velocities V0=10.0 m/s, the final velocities V1=10.5, 11.0, 11.5, 12.0 m/s were selected. The result under the condition of a constant rotational speed revealed the flow around a rotor of the wind turbine, which followed the wind velocity change of the main flow very quickly. In the case of constant load torque condition, the effective torque of the wind turbine abruptly increased up to the value on the torque curve of the final wind velocity V1, with turbine rotational speed kept almost constant. After that, the effective torque decreased along the torque curve of final wind level to reach the final stage.
We present two interatomic potentials for hydrogen in α–iron based on the embedded atom method potentials for iron developed by Mendelev et al. [Philos. Mag. 83, 3977 (2003)] and Ackland et al. [J. Phys.: Condens....
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We present two interatomic potentials for hydrogen in α–iron based on the embedded atom method potentials for iron developed by Mendelev et al. [Philos. Mag. 83, 3977 (2003)] and Ackland et al. [J. Phys.: Condens. Matter 16, S2629 (2004)]. Since these latter potentials are unique among existing iron potentials in their ability to produce the same core structure for screw dislocations as density functional theory (DFT) calculations, our interatomic potentials for hydrogen in iron also inherit this important feature. We use an extensive database of energies and atomic configurations from DFT calculations to fit the cross interaction of hydrogen with iron. Detailed tests on the dissolution and diffusion of hydrogen in bulk α–iron, as well as the binding of H to vacancies, free surfaces, and dislocations, indicate that our potentials are in excellent overall agreement with DFT calculations.
In this paper we show a straight forward extension of the fuzzy Cohen's-κ to Fleiss'-κ for the determination of classification agreements of fuzzy classifiers. In addition we investigate the influence of dif...
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ISBN:
(纸本)2930307099
In this paper we show a straight forward extension of the fuzzy Cohen's-κ to Fleiss'-κ for the determination of classification agreements of fuzzy classifiers. In addition we investigate the influence of different interpretations of fuzzy intersection in terms of t-norms. These considerations are done for exemplary artificial data as well as for classification in image recognition for counting pollen grains.
New emerging technologies such as high-precision sensors or new MRI machines drive us towards a challenging quest for new, more effective, and more daring mathematical models and algorithms. Therefore, in the last few...
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In this paper we introduce Median Fuzzy C-Means (MFCM). This algorithm extends the Median C-Means (MCM) algorithm by allowing fuzzy values for the cluster assignments. To evaluate the performance of M-FCM, we compare ...
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ISBN:
(纸本)2930307099
In this paper we introduce Median Fuzzy C-Means (MFCM). This algorithm extends the Median C-Means (MCM) algorithm by allowing fuzzy values for the cluster assignments. To evaluate the performance of M-FCM, we compare the results with the clustering obtained by employing MCM and Median Neural Gas (MNG).
An exact form is presented for the axial-vector Bethe-Salpeter equation, which is valid when the quark-gluon vertex is fully dressed. A Ward-Takahashi identity for the Bethe-Salpeter kernel is derived therefrom and so...
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An exact form is presented for the axial-vector Bethe-Salpeter equation, which is valid when the quark-gluon vertex is fully dressed. A Ward-Takahashi identity for the Bethe-Salpeter kernel is derived therefrom and solved for a class of dressed quark-gluon-vertex models. The solution provides a symmetry-preserving closed system of gap and vertex equations. The analysis can be extended to the vector equation. This enables a comparison between the responses of pseudoscalar and scalar meson masses to nonperturbatively dressing the quark-gluon vertex. The result indicates that dynamical chiral symmetry breaking enhances spin-orbit splitting in the meson spectrum.
The geometries, electronic structures, polarizabilities and hyperpolarizabilities, as well as the UV-Vis spectra of the two organic dye sensitizers containing bis-dimethylfluorenyl amino benzofuran were studied via de...
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The geometries, electronic structures, polarizabilities and hyperpolarizabilities, as well as the UV-Vis spectra of the two organic dye sensitizers containing bis-dimethylfluorenyl amino benzofuran were studied via density functional theory （DFT） and time-dependent DFT. The features of electronic absorption spectra were assigned on account of the agreement between the experiment and the calculations. The absorption bands in visible region are related to photoinduced electron transfer processes, and the dimethylfluorenyl amino benzo[b]furan groups are major chromophore that contributed to the sensitization of photo-to-current conversion. The role of vinylene group in geometry, electronic structure and spectra property is analyzed according to the comparative study of the dyes.
Using first-principles calculations, we systematically study the adsorption behavior of molecular CO on the Be(0001) surface. By calculating the potential-energy surfaces, we find that the molecular adsorption of CO o...
Using first-principles calculations, we systematically study the adsorption behavior of molecular CO on the Be(0001) surface. By calculating the potential-energy surfaces, we find that the molecular adsorption of CO on Be(0001) encounters small energy barriers in various entrance channels. The most stable adsorption state is found to be the one at the surface fcc hollow site and the one at the surface top site is the adsorption state that has the smallest energy barrier. Based on electronic structure analysis, we further reveal that during the molecular adsorption, the 5σ bonding and 2π antibonding orbitals of CO hybridize with s and pz electronic states of Be, causing electrons to transfer from CO to Be.
We develop a numerical scheme to investigate the high-order harmonic generation (HHG) in intense laser-matter interactions. We represent the time-dependent wave function in the basis of the eigenstates of the field-fr...
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We develop a numerical scheme to investigate the high-order harmonic generation (HHG) in intense laser-matter interactions. We represent the time-dependent wave function in the basis of the eigenstates of the field-free Hamiltonian and trace its temporal evolution. Our full quantum simulations reveal that continuum electrons with a broad energy distribution contribute equally to one harmonic and the excited state also plays an important role in the molecular HHG. These results imply a laser-intensity-dependent picture of intramolecular interference in the HHG.
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