Holographic Van der Waals-like phase transition in the Gauss-Bonnet gravity

The Van der Waals-like phase transition is observed in temperature-thermal entropy plane in spherically symmetric charged Gauss-Bonnet-AdS black hole background. In terms of AdS/CFT, the non-local observables such as holographic entanglement entropy, Wilson loop, and two point correlation function of very heavy operators in the field theory dual to spherically symmetric charged Gauss-Bonnet-AdS black hole have been investigated. All of them exhibit the Van der Waals-like phase transition for a fixed charge parameter or Gauss-Bonnet parameter in such gravity background. Further, with choosing various values of charge or Gauss-Bonnet parameter, the equal area law and the critical exponent of the heat capacity are found to be consistent with phase structures in temperature-thermal entropy plane.Comment: Some statements about the analogy between the black hole phase transition in $T-S$ plane and Van der Waals-like phase transition in $P-V$ plane are added. This is the published versio

4,4′-Bis(2-methoxy­lstyr­yl)biphen­yl

The title compound, C30H26O2, was prepared by the reaction of a Wittig reagent and 2-methoxy­benzaldehyde. The mol­ecule lies about an inversion centre located at the midpoint of the C—C bond between the inner benzene rings. The crystal structure is stabilized by C—H⋯π inter­actions

2,2′-[(Biphenyl-4,4′-di­yl)di(ethene-1,2-di­yl)]dibenzene­sulfonic acid–4-methyl­piperidine–water (1/2/2)

The title compound, C28H22O6S2·2C6H13N·2H2O, was prepared by the reaction of a Wittig reagent and 2-formyl­benzene­sulfonic acid. The main molecule lies about an inversion centre at the midpoint of the C—C bond between the inner benzene rings. The mol­ecular conformation is stabilized by intramolecular hydrogen bonds. The crystal structure is further stabilized by O—H⋯O and N—H⋯O hydrogen-bonding inter­actions

Active Surface with Passive Omni-Directional Adaptation of Soft Polyhedral Fingers for In-Hand Manipulation

Track systems effectively distribute loads, augmenting traction and maneuverability on unstable terrains, leveraging their expansive contact areas. This tracked locomotion capability also aids in hand manipulation of not only regular objects but also irregular objects. In this study, we present the design of a soft robotic finger with an active surface on an omni-adaptive network structure, which can be easily installed on existing grippers and achieve stability and dexterity for in-hand manipulation. The system's active surfaces initially transfer the object from the fingertip segment with less compliance to the middle segment of the finger with superior adaptability. Despite the omni-directional deformation of the finger, in-hand manipulation can still be executed with controlled active surfaces. We characterized the soft finger's stiffness distribution and simplified models to assess the feasibility of repositioning and reorienting a grasped object. A set of experiments on in-hand manipulation was performed with the proposed fingers, demonstrating the dexterity and robustness of the strategy.Comment: 10 pages, 6 figures, 2 tables, submitted to ICRA 202

Late Miocene-Quaternary Synchronous-But-Magnitude- Differentiated Episodic Rapid Uplifts of The NE Tibetan Plateau: A Synthesis From Flexural Basins

Abstract HKT-ISTP 2013 A

An explanation of capital structure of China\u27s listed property firms

Purpose– The purpose of this paper is to investigate the determinants of the capital structure of listed property firms in China.Design/methodology/approach– The study is based on quantitative methods such as dynamic panel data models and a panel data set containing financial and accounting data for all listed property companies from 2006 to 2010 in China.Findings– The findings confirm that the state-own shares, the fixed asset values, the total size of assets and profitability have a positive and significant impact on the leverage ratio of listed property firms in China. The negative impact of the tax shields and the currency ratio, and significant impact of state-own shares on capital structure cannot be explained by existing capital structure theory but the unique property market regulation environment and market conditions in China.Research limitations/implications– The findings confirm the applicability of trade-off theory (except for the correlation between leverage and the tax shield) on property companies in China. They also highlight the importance of government policies and special market conditions in explaining the financing behaviour of property companies in transaction countries like China.Practical implications– Complimentary policies should be established along with property market restriction policies to offset their unequal negative effect on property companies with less state-owned shares. Furthermore, government should invest efforts to eliminate the discrimination credit treatment of banks against property companies with non-existent or few state-owned shares.Originality/value– The special financial behaviour of China\u27s property firms and the unique financial and property market conditions highlight the necessity of researching the capital structure of listed property firms in China. However, most of the existing literature focuses on the company financial behaviour in developed countries, and very few studies have been done concerning property firms’ financing behaviour in emerging economies such as China, and this research prospects to fill this blank