Behavior of concrete-filled double skin steel tubular columns under eccentric compression after fire

[EN] To analysis the behavior of the mechanical properties of concrete-filled double skin steel tubular (CFDST) columns under eccentric loads after fire, the finite element analysis was used. The established FEA modeling was verified by the experimental results which has a good agreement. The FEA modeling was then used to perform the temperature field and the full-range load-deformation relations of the CFDST subject to eccentric compression after exposed to fire. The results indicate that: with the time of fire increasing, the eccentric distance increasing, the steel ratio decreasing, the yield strength decreasing and compressive strength decreasing, the bearing capacity of CFDST in circle section under eccentric loads is showing a decrease trend, and the stiffness of component decreases with the time of fire increasing, the eccentric distance increasing and the steel ratio decreasing. The ductility of CFDST became better with the time of fire increasing and the eccentric distance increasing.Liu, X.; Xu, J.; Wang, B. (2018). Behavior of concrete-filled double skin steel tubular columns under eccentric compression after fire. En Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures. ASCCS 2018. Editorial Universitat Politècnica de València. 803-810. https://doi.org/10.4995/ASCCS2018.2018.7008OCS80381

The maturity-lengthening role of national development banks

We analyze why national development banks (NDBs) may provide longer-term loans to firms than private commercial banks (PCBs). If NDB bonds have higher collateral value than PCB bonds, then NDBs may lend longer-term than PCBs. NDBs may enjoy higher recapitalization willingness and capacity by the state and hence greater collateral value than PCBs. Moreover, NDBs may have advantages over state-owned commercial banks if NDB bonds enjoy higher market liquidity. However, NDBs may suffer from poor monitoring quality owing to undue political intervention, thus undermining collateral value. Our study implies that NDBs are not substitutes for but complements to PCBs.Fil: Schclarek Curutchet, Alfredo. Universidad Nacional de Córdoba. Facultad de Ciencias Económicas. Departamento de Economía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Xu, Jiajun. Peking University; ChinaFil: Yan, Jianye. Beijing Institute Of Technology; Chin

The maturity lengthening role of National Development Banks

Fil: Schclarek Curutchet, Alfredo. Universidad Nacional de Córdoba. Facultad de Ciencias Económicas. Departamento de Economía y Finanzas; Argentina.Fil: Xu, Jiajun. Peking University. Institute of New Structural Economics; China.Fil: Yan, Jianye. Peking University. Institute of New Structural Economics; China.This paper theoretically discusses why state-owned national develop- ment banks (NDBs) may be better able to provide longer-term lending to firms (investors), in comparison to private commercial banks (CBs). NDBs can grant longer-term lending to firms (investors) because NDB bonds have more value than the bonds issued by CBs, thus allowing banks to better cope with maturity mismatch risks and liquidity problems in case of needing to make interbank payments. The reason that NDB bonds have more value than the bonds issued by CBs is that NDBs are owned by the government, hence there is a higher recapitalization willingness and capac- ity compared to private bank owners. Regarding the maturity lengthening role of NDBs, it is positively related to the amount of liquid asset holdings by NDBs, the collateral value of the investment projects that receive NDB financing, and the recapitalization willingness (or perceived willingness) and financial strength, and net worth, of the government.Fil: Schclarek Curutchet, Alfredo. Universidad Nacional de Córdoba. Facultad de Ciencias Económicas. Departamento de Economía y Finanzas; Argentina.Fil: Xu, Jiajun. Peking University. Institute of New Structural Economics; China.Fil: Yan, Jianye. Peking University. Institute of New Structural Economics; China.Economía, Econometrí

Dynamics in direct two-photon transition by frequency combs

Two-photon resonance transition technology has been proven to have a wide range of applications,it's limited by the available wavelength of commercial lasers.The application of optical comb technology with direct two-photon transition (DTPT) will not be restricted by cw lasers.This article will further theoretically analyze the dynamics effects of the DTPT process driven by optical frequency combs. In a three-level atomic system, the population of particles and the amount of momentum transfer on atoms are increased compared to that of the DTPT-free process. The 17% of population increasement in 6-level system of cesium atoms has verified that DTPT process has a robust enhancement on the effect of momentum transfer. It can be used to excite the DTPTs of rubidium and cesium simultaneously with the same mode-locked laser. And this technology has potential applications in cooling different atoms to obtain polar cold molecules, as well as high-precision spectroscopy measurement.Comment: 7 pages, 7 figure

Long-term finance provision: National development banks vs commercial banks

Despite its practical significance in promoting long-term economic growth, long-term finance is often in short supply, especially in developing countries. Governments in both developed and developing countries have established national development banks (NDBs) to provide much-needed long-term loans. We have built the first database on NDBs worldwide to systematically examine whether NDBs lend longer than commercial banks in deciding the maturity of their loans. We find that long-term loans constitute a larger proportion of the total loan portfolio in NDBs than that in commercial banks in general and privately owned commercial banks in particular. This result is statistically significant after controlling for country- and bank-level factors. Our study contributes to the literature on loan maturity because we are the first to use a comprehensive panel data to systematically examine whether NDBs—an understudied but important financial intermediary—play a maturity-lengthening role in filling the financing gap.Fil: Hu, Bo. Peking University; ChinaFil: Schclarek Curutchet, Alfredo. Universidad Nacional de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Xu, Jiajun. Peking University; ChinaFil: Yan, Jianye. China Agricultural University; Chin

HiTE: A Fast and Accurate Dynamic Boundary Adjustment Approach for Full-Length Transposable Element Detection and Annotation

Recent advancements in genome assembly have greatly improved the prospects for comprehensive annotation of Transposable Elements (TEs). However, existing methods for TE annotation using genome assemblies suffer from limited accuracy and robustness, requiring extensive manual editing. In addition, the currently available gold-standard TE databases are not comprehensive, even for extensively studied species, highlighting the critical need for an automated TE detection method to supplement existing repositories. In this study, we introduce HiTE, a fast and accurate dynamic boundary adjustment approach designed to detect full-length TEs. The experimental results demonstrate that HiTE outperforms RepeatModeler2, the state-of-the-art tool, across various species. Furthermore, HiTE has identified numerous novel transposons with well-defined structures containing protein-coding domains, some of which are directly inserted within crucial genes, leading to direct alterations in gene expression. A Nextflow version of HiTE is also available, with enhanced parallelism, reproducibility, and portability