Magneto-vortical effect in strongly coupled plasma

Based on a holographic model incorporating both chiral anomaly and gravitational anomaly, we study the effect of magneto-vortical coupling on transport properties of a strongly coupled plasma. The focus of present work is on the generation of a vector charge density and an axial current, as response to vorticity in a magnetized plasma. The transport coefficients parameterising the vector charge density and axial current are calculated both analytically (in the weak magnetic field limit) and also numerically (for general values of the magnetic field). We find the generation of vector charge receives both non-anomalous and anomalous contributions, with the non-anomalous contribution dominating in the limit of strong magnetic field and the anomalous contribution sensitive to both chiral anomaly and gravitational anomaly. On the contrary, we find the axial current is induced entirely due to the gravitational anomaly, thus we interpret the axial current generation as chiral vortical effect. The corresponding chiral vortical conductivity is found to be suppressed by the magnetic field. By Onsager relation, these transport coefficients are responsible for the generation of a thermal current due to a transverse electric field or a transverse axial magnetic field, which we call thermal Hall effect and thermal axial magnetic effect, respectively.Comment: 37 pages, 6 figure

Influential Factors upon Universities’ Patent Application in China Jiangsu Province: Based on Structural Equation Model

Nowadays, independent intellectual property rights have become a powerful weapon for the national competition. Mass innovation is also one of the engines of economic development. China is accelerating the construction of an innovative country. As patents are an important part of independent intellectual property rights, research on patents is helpful to China's innovation construction. Ten factors affecting the higher institutions’ patent application are summarized and extracted by carding literature. On this basis, three main factors including higher institutions’ internal environment, social environment and cooperative environment which influence the ten factors are abstracted by utilizing the exploratory factor analysis. Then, this paper takes China Jiangsu province higher institutions as an example to construct the influential factors’ routes model of higher institutions’ patent application. Structural equation model is used to verify and modify the model based on the questionnaire data. The results show that the three types of environment have a positive effect on higher institutions’ patent application, in which the higher institutions’ internal environment has the most effect on the patent application. The higher institutions’ internal environment and the social environment also have an effect on the cooperative environment, which also affects the patent application. Therefore, higher institutions and society are required to improve their internal environment and construct the favorable social environment of patent application respectively as well as the higher institutions and governments are required to create the cooperative environment that is beneficial for patent application so that they can promote the higher institutions’ patent application. Keywords: patent application; influential factors; influential route; structural equation model DOI: 10.7176/EJBM/12-9-01 Publication date:March 31st 202

Endometrial thickness and early pregnancy complications after frozen-thawed embryo transfers

BackgroundThe relationship between endometrial thickness and pregnancy safety after in vitro fertilization treatment is an important topic that should provoke attention. The aim of this study was to demonstrate the relationship between endometrial thickness on day of embryo transfer and early pregnancy complications, including ectopic pregnancy and early miscarriage, in frozen thawed embryo transfer (FET) cycles.MethodsPatients undergoing their first FET cycles were included into this study from January 2010 to December 2021. Patients were divided into three groups according to endometrial thickness on day of embryo transfer: Thin, ≤ 7 mm; Medium, 7-14 mm; Thick, ≥ 14 mm. Ectopic pregnancy and early miscarriage were the two primary outcomes. Endometrial thickness was the main measured variable. The risk factors of these two compilations were determined based on univariate analysis and multivariate logistic regression analysis.ResultsA total of 11138 clinical pregnancies were included. The overall ectopic pregnancy and early spontaneous miscarriage rates were 2.62% and 13.40%. The ectopic pregnancy and early spontaneous miscarriage rates were significantly higher in patients with thin endometrium as compared with those in the other two groups (ectopic pregnancy rate: 5.06% vs. 2.62% vs. 1.05%; P < 0.001; early spontaneous miscarriage rate: 15.18% vs. 13.45% vs. 11.53%; P < 0.001). In multivariate logistic regression analysis, thin endometrium was an independent factor to predict ectopic pregnancy [adjusted odds ratio (aOR): 5.62; 95% confidence interval (CI): 2.51–12.58, P < 0.001], and to predict early spontaneous miscarriage rate (aOR: 1.57; 95% CI: 1.21–1.74, P < 0.001).ConclusionThin endometrium on day of embryo transfer in FET cycles is an independent predictor for early pregnancy compilations, including ectopic pregnancy and early spontaneous miscarriage

Effects of anisotropic composite skin on electrothermal anti-icing system

To study the effects of anisotropic thermal conductivity of composite aircraft skin on the heat transfer characteristics of electrothermal anti-icing system, the differential equation of anisotropic heat conduction was established using coordinate transformation of principal anisotropy axis. In addition, it was coupled with the heat and mass transfer model of the runback water film on the anti-icing surface to perform numerical simulation of the electrothermal anti-icing system. The temperature results of the vertical and cylindrical orthotropic thermal conduction in the rectangular and semi-cylindrical composite skin were consistent with those obtained by the traditional orthotropic model, which verified the anisotropic heat conduction model. The temperature distribution of anti-icing surface agreed well with the literature data, which validated the coupled heat and mass model of the runback water flow and the anisotropic skin. The anisotropic thermal conductivity of composite skin would make temperature change more gradual, and the effect was more significant where the curvature of the temperature curve was greater. However, the anti-icing surface of the electrothermal anti-icing system was slightly affected by the anisotropic heat conduction of the multilayered composite skin