Seismic behavior of SFRC shear wall with CFST columns

Danying Gao,Pei-Bo You,Li-Juan Zhang,Huan-Huan Yan 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.28 No.5

The use of reinforced concrete (RC) shear wall with concrete filled steel tube (CFST) columns and steel fiber reinforced concrete (SFRC) shear wall has aroused widespread attention in recent years. A new shear wall, named SFRC shear wall with CFST columns, is proposed in this paper, which makes use of CFST column and SFRC shear wall. Six SFRC shear wall with CFST columns specimens were tested under cyclic loading. The effects of test parameters including steel fiber volume fraction and concrete strength on the failure mode, strength, ductility, rigidity and dissipated energy of shear wall specimens were investigated. The results showed that all tested shear wall specimens exhibited a distinct shear failure mode. Steel fibers could effectively control the crack width and improve the distribution of cracks. The load carrying and energy dissipation capacities of specimens increased with the increase of steel fiber volume fraction and concrete strength, whilst the ductility of specimens increased with the increase of steel fiber volume fraction and the decrease of concrete strength.

Knee Defect Reconstruction Using the Distally Based Anterolateral Thigh Flap Based on the Reverse Flow from the Oblique Branch of the Lateral Circumflex Femoral Artery

Danying Wang,Mengqing Zang,Hengyuan Ma,Yuanbo Liu 대한성형외과학회 2022 Archives of Plastic Surgery Vol.49 No.3

Reconstruction of soft tissue defects around the knee is challenging, and the most common solution is to use various locoregional flaps or, in some difficult cases, a free flap. The distally based anterolateral thigh (dALT) flap is a commonly used flap that relies on reverse blood flow from the descending branch of the lateral circumflex femoral artery (d-LCFA). Here, we present the case of an anteromedial knee reconstruction using a dALT flap after resection of a pleomorphic undifferentiated sarcoma. The tumor resection resulted in a 147 cm defect, and a dALT flap, measuring 208 cm was elevated. During the surgery, we found a robust oblique branch of the LCFA (o-LCFA) sending off two sizable perforators to the anterolateral thigh region, whereas the d-LCFA was relatively small with no usable perforators. Therefore, we harvested a dALT flap relying on reverse flow from the o-LCFA. The patient’s postoperative course was uneventful, and the flap survived without complications. This report demonstrates that reverse flow from the o-LCFA may be an alternative to nourish a dALT flap in cases where the d-LCFA is hypoplastic or suitable perforators from the d-LCFA are unavailable.

A multi-resolution analysis based finite element model updating method for damage identification

Xin Zhang,Danying Gao,Yang Liu 국제구조공학회 2015 Smart Structures and Systems, An International Jou Vol.16 No.1

A novel finite element (FE) model updating method based on multi-resolution analysis (MRA) is proposed. The true stiffness of the FE model is considered as the superposition of two pieces of stiffness information of different resolutions: the pre-defined stiffness information and updating stiffness information. While the resolution of former is solely decided by the meshing density of the FE model, the resolution of latter is decided by the limited information obtained from the experiment. The latter resolution is considerably lower than the former. Second generation wavelet is adopted to describe the updating stiffness information in the framework of MRA. This updating stiffness in MRA is realized at low level of resolution, therefore, needs less number of updating parameters. The efficiency of the optimization process is thus enhanced. The proposed method is suitable for the identification of multiple irregular cracks and performs well in capturing the global features of the structural damage. After the global features are identified, a refinement process proposed in the paper can be carried out to improve the performance of the MRA of the updating information. The effectiveness of the method is verified by numerical simulations of a box girder and the experiment of a three-span continues pre-stressed concrete bridge. It is shown that the proposed method corresponds well to the global features of the structural damage and is stable against the perturbation of modal parameters and small variations of the damage.

Comparative Analysis of Nkx2-5/GATA4/TBX5 Expression in Chicken, Quail and Chicken-quail Hybrids during the Early Stage of Cardiac Development in Embryos

Ban, Qian,Liu, Xiaojun,Hui, Wenqiao,Chen, Danying,Zhao, Zongsheng,Jia, Bin Asian Australasian Association of Animal Productio 2013 Animal Bioscience Vol.26 No.4

The present study makes an investigation into expression of genes related to cardiac development in chicken, quail and chicken-quail hybrids during the early stage of embryogenesis. Real-time PCR was used to detect mRNA expressions of Nkx2-5, GATA4 and TBX5 in the heart of chicken, quail and chicken-quail hybrids embryos during the 3rd to 7th days of incubation. Results showed that NKX2-5 mRNA displayed a similar expression trend in chicken, quail and chicken-quail hybrids. The initial and highest expression of Nkx2-5 was focused on the 3rd day of incubation, then it declined till 5th day of incubation, thereafter, it fluctuated. Expression of Nkx2-5 gene in quail was significantly higher than in chicken and chicken-quail hybrids, and no significant difference was observed between the two latter species. GATA4 mRNA showed a similar expression trend between chicken and quail, which displayed a steady increase from 3rd to 6th d, then, the expression level decreased. However, GATA4 mRNA expression in chicken-quail hybrids was significantly higher than that in chicken and quail from 3rd to 5th d (p<0.01), but significantly lower than that in chicken and quail during the later stage of the experiment (p<0.05), due to the dramatic drop from 5th d onwards (p<0.01). TBX5 mRNA expression in chicken and quail showed the same trend as GATA4 expressed in the two species. Furthermore, TBX5 expression in chicken-quail hybrids was significantly higher than that in chicken and quail during the whole course of experiment, although relatively lower TBX5 expression was detected in the early stage. In conclusion, Nkx2-5, GATA4 and TBX5 genes showed dynamic changes during the process of cardiac development in chicken, quail and their hybrids embryos. In addition, the expression trend in chicken was similar to that in quail, and there was no significant difference for gene expression level, except NKX2-5. However, expression of these genes in chicken-quail hybrids was significantly different from their parents, the difference mechanism needs to be further explored.

Pullout Behaviour of Different Types of Steel Fibres Embedded in Magnesium Phosphate Cementitious Matrix

Hu Feng,M. Neaz Sheikh,Muhammad N. S. Hadi,Lu Feng,Danying Gao,Jun Zhao 한국콘크리트학회 2019 International Journal of Concrete Structures and M Vol.13 No.4

A series of pullout tests were conducted to investigate the interface bond properties of seven types of steel fibres embedded in the magnesium phosphate cementitious matrix. The micromorphology of the interface transition zone between MPC and different types of fibres was examined by scanning electron microscope. Test results showed that smaller diameter steel fibres with brass coating surface achieved higher average bond strength, higher pullout energy per unit volume and a higher ratio of material use. The end hook deformation provided the mechanical bond locally whereas the deformation along the length of fibre provided the mechanical bond distributed along the fibre. The failure mode and group effect of steel fibres were also investigated and reported.

Super-resolution fluorescent materials: an insight into design and bioimaging applications

Yang, Zhigang,Sharma, Amit,Qi, Jing,Peng, Xiao,Lee, Dong Yeop,Hu, Rui,Lin, Danying,Qu, Junle,Kim, Jong Seung The Royal Society of Chemistry 2016 Chemical Society reviews Vol.45 No.17

<P>Living organisms are generally composed of complex cellular processes which persist only within their native environments. To enhance our understanding of the biological processes lying within complex milieus, various techniques have been developed. Specifically, the emergence of super-resolution microscopy has generated a renaissance in cell biology by redefining the existing dogma towards nanoscale cell dynamics, single synaptic vesicles, and other complex bioprocesses by overcoming the diffraction-imposed resolution barrier that is associated with conventional microscopy techniques. Besides the typical technical reliance on the optical framework and computational algorithm, super-resolution imaging microscopy resorts largely to fluorescent materials with special photophysical properties, including fluorescent proteins, organic fluorophores and nanomaterials. In this tutorial review article, with the emphasis on cell biology, we summarize the recent developments in fluorescent materials being utilized in various super-resolution techniques with successful integration into bio-imaging applications. Fluorescent proteins (FP) applied in super-resolution microscopy will not be covered herein as it has already been well summarized; additionally, we demonstrate the breadth of opportunities offered from a future perspective.</P>

European Union Emission Trading System How far will the european union dare to go?

Daniè,le Barberis 유럽헌법학회 2009 유럽헌법연구 Vol.5 No.-

유럽연합 입법부가 2003년 10월111)에 교토 협안112)(2002년 4월) 안에 있는 방사물들 감소에 대처하기 위하여 (2005년에 시작된 하나의 단계) CO2 방사물 상업에 종사하는 자를 위하여 계획안을 제의하였다(EU 방사물 상업종사 계획안 또는 ETS). 3년 후에 첫 번째 계획안 단계가 끝남으로써 무엇보다도 두 번째와 세 번째 단계에 관해서 말로 표명되어 있는 관여물들이 두 번째 단계에 천천히 탄력이 붙었다. 이 문제점들은 가지각색의 주 구성원의 주권과 유럽 법령의 집중된 힘 사이에서 균형을 유지하기 위하여 유럽연합법들이 노력하고 있는 것에 깊이 생각되어질 것이다. 주요 논점들은 다음과 같다. 유럽은 환경 보호를 위하여 다량의 산업의 급증하는 요구를 반대할 예정인가? ETS에 의하여 축적된 막대한 유로의 이익을 얻는 것은 유럽연합과 구성원 중 누구인가? 무엇보다도 : 유럽연합 행정부와 입법부가 어떻게 CO2 방사물 감소지역에 가려고 노력할 것인가? In October 2003, in order to meet emission reduction objectives as laid down within the Kyoto Protocol (April 2002), the European Union (EU) Legislature has set up a scheme (whose phase one started in 2005) for trading CO2 emission allowances (‘EU Emission Trading Scheme’ or ETS). Three years later, as the first phase of the scheme ends and the second phase slowly gains momentum, concerns are being voiced regarding this second phase and above all the third phase. Issues are to be considered in the light of the EU Law’s struggle to set a balance between its various States Members national sovereignty and the centralized power of European Institutions. The mains questions are as follows. Is Europe’s heavy industry going to resist the ever-growing demand for environmental protection? Who from the European Union or the Member States is going to benefit from the billions of Euros amassed by the ETS? Above all: how far will the European Union executive branch and legislature dare to go in the field of CO2 emission reduction?

Tajdīd (Renewal) in Sufism: An Examination of Khālid al-Baghdādī’s Thoughts and Practices from the Perspective of Social Capital Theory

( İdiris Danişmaz ) 부산외국어대학교 지중해지역원 2019 The Mediterranean Review Vol.12 No.1

Renewal (tajdīd) has been one of the most controversial issues in the Islamic world. Throughout Islamic history, and especially since the Ottoman Empire started to lose ground to the West, there has been much debate about matters that need changing and how change should happen. One group that was both the subject and the agent of the change was the Sufis. One such influential Sufi mujaddid (innovator) was Khālid al-Baghdādī (d.1827). His innovative approaches have allowed Sufism to transform into activism, serving as a model for Sufis as well as for non-Sufi movements across all sectors of life. This study, which explores some conceptual similarities between Khālid al-Baghdādī’s innovative practices and social capital, analyzes his thoughts, and offers a conceptual framework in order to explain the complexity of the activities of the organizations he influenced, and to describe the process of producing social activism out of Sufism and the Sufi orders (ṭarīqa). It is hoped this study, by being the first attempt to look at Sufism from the perspective of social capital theory will serve as a starting point for further research.

Constitutive model coupled with damage for carbon manganese steel in low cycle fatigue

Zhiyong Huang,Qingyuan Wang,Danièle Wagner,Claude Bathias 국제구조공학회 2014 Steel and Composite Structures, An International J Vol.17 No.2

Carbon-manganese steel A42 (French standards) is used in steam generator pipes of nuclear center and subject to low cycle fatigue (LCF) loads. In order to obtain the material LCF behavior, the tests are implemented in a hydraulic fatigue machine. The LCF plastic deformation and cyclic stress in macroscope have been influenced by the accumulated low cycle fatigue damage. The constitutive kinematic and isotropic hardening modeling is modified with coupling fatigue damage to describe the fatigue behavior. The improved model seems to be good agreement with the test results.

Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole

Bore Jegdić,Biljana Bobić,Maja Stevanović,Marija Mihailović,Dunja Daničić,Jovanka Kovačina,Bojana Radojković 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.11

The paper analyses the corrosion behaviour of both naturally and artificially aged AA2024 aluminium alloy in NaCl solutionin the presence of the corrosion inhibitor benzotriazole (BTA). The differences between these two aging tempers in termsof resistance to general corrosion are explained as well as the differences in terms of pit formation and pit growth. Basedon the values of the polarisation resistance and the corrosion current density, the general corrosion resistance of the alloyis determined in the absence and in the presence of BTA. The resistance to pit formation and pit growth is determined onthe basis of the polarisation measurements results. Scanning electron microscopy confirmed the expected differences in theappearance and size of the pits formed in naturally aged and artificially aged alloy. In the presence of the corrosion inhibitorBTA, for both aging tempers of the alloy, the corrosion resistance is significantly higher compared to the resistance in thesolution without the inhibitor. The value of the polarisation resistance for both aging tempers increases over time. However,at the same time, the value of the constant phase element increases as well. An explanation for this phenomenon is provided. The calculated average value of the thickness of the adsorbed inhibitor layer on the surface of the aluminium alloy is inaccordance with the inhibitor protective ability for both aging tempers.