A self-powered β-Ga2O3/CsCu2I3 heterojunction photodiode responding to deep ultraviolet irradiation

Gao Ang,Jiang Weiyu,Ma Guoliang,Liu Zeng,Li Shan,Yan Zuyong,Sun Weiming,Zhang Shaohui,Tang Weihua 한국물리학회 2022 Current Applied Physics Vol.33 No.-

In this paper, a lead-free halide perovskite CsCu2I3 film with high stability was prepared by the anti-solvent assisted crystallization method. Then, we coupled it with Ga2O3 to prepare a corresponding heterojunction deep ultraviolet (UV) photodetector. After testing, we concluded that the photodetector is sensitive to 254 nm UV light. The photodetector has good reproducibility, and has an ultra-high photo-to-dark current ratio (PDCR) of more than 105. In addition, under a bias of 10 V and an illuminated intensity of 200 μW/cm2, the responsivity (R) and specific detectivity (D*) reached 20 mA/W and 107 cm Hz1/2 W 1 (Jones), and the external quantum efficiency (EQE) is 10%. Meanwhile, the prepared photodetector could operate at zero bias, i.e., self-powered operation, along with a photocurrent of about 1 nA under illumination with UV light intensity of 200 μW/cm2.

Knockdown of HMGN5 Expression by RNA Interference Induces Cell Cycle Arrest in Human Lung Cancer Cells

Chen, Peng,Wang, Xiu-Li,Ma, Zhong-Sen,Xu, Zhong,Jia, Bo,Ren, Jin,Hu, Yu-Xin,Zhang, Qing-Hua,Ma, Tian-Gang,Yan, Bing-Di,Yan, Qing-Zhu,Li, Yan-Lei,Li, Zhen,Yu, Jin-Yan,Gao, Rong,Fan, Na,Li, Bo,Yang, Jun Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7

HMGN5 is a typical member of the HMGN (high mobility group nucleosome-binding protein) family which may function as a nucleosomal binding and transcriptional activating protein. Overexpression of HMGN5 has been observed in several human tumors but its role in tumorigenesis has not been fully clarified. To investigate its significance for human lung cancer progression, we successfully constructed a shRNA expression lentiviral vector in which sense and antisense sequences targeting the human HMGN5 were linked with a 9-nucleotide loop. Inhibitory effects of siRNA on endogenous HMGN5 gene expression and protein synthesis were demonstrated via real-time RT-PCR and western blotting. We found HMGN5 silencing to significantly inhibit A549 and H1299 cell proliferation assessed by MTT, BrdU incorporation and colony formation assays. Furthermore, flow cytometry analysis showed that specific knockdown of HMGN5 slowed down the cell cycle at the G0/G1 phase and decreased the populations of A549 and H1299 cells at the S and G2/M phases. Taken together, these results suggest that HMGN5 is directly involved in regulation cell proliferation in A549 and H1299 cells by influencing signaling pathways involved in cell cycle progression. Thus, our finding suggests that targeting HMGN5 may be an effective strategy for human lung cancer treatment.

China’s Legislative Trend on Cruise Carrier’s Liability –Focus on the first draft of Proposal for Revising the Maritime Law-

Yan-Qiu MA 한국해사법학회 2018 해사법연구 Vol.30 No.3

중국은 현재 해상법 개정작업을 시작하여, 개정안초안에 대한 전문가의견수렴단계에 있다. 해상여객운송인의 책임에 대하여, 개정안초안은 아테네협약 2002년 의정서의 일부 원칙을 수용하였는데, 크루즈운송인의 의무와 책임에 관한 내용을 증가하였다. 이종책임체계, 크루즈운송인의 의무, 강제보험과 직접 청구권 등 규정을 신설하였는바, 이는 크루즈여객에 대하여 강력한 보호를 제공하고자 하고 있으며, 여객으로 하여금 권리의 존재여부를 쉽게 알도록 하고 있다. 그러나 개정안초안의 크루즈운송인책임제도는 아직 미흡한 점이 있는바 이를 보완할 필요가 있다. 본 고는 해상법개정안초안의 크루즈운송인책임제도와 현행 해상법 및 <아테네협약 2002년 의정서> 내용에 대한 비교연구를 통하여 중점적으로 크루즈운송인의 책임기간과 의무, 크루즈운송중 부동한 운송기간운송인의 책임에 대한 법률적용, 책임기초, 책임제한, 강제책임보험 및 강제책임보험인에 대한 직접 청구권 등 문제를 규명하고자 한다. China initiated the revision of the Maritime Law and the first draft of the Proposal is soliciting opinions from law field as well as shipping field. The Ministry of Transport of the People’s Republic of China has been continuously carrying out revision research on the Maritime law. It has organized two systematic studies in 2000 and 2013 respectively, with certain basic accumulation. Considering the professional and the complexity of maritime law, a research program is formed again in 2017 and, after nearly two years of hard work, a first draft proposal was ultimately finished. The Proposal borrows some general principles from the 2002 Athens Protocol for the passenger carrier’s liability regime. What’s more, some provisions specific for cruise carrier’s duties and liabilities are added in such as network liability system, cruise carrier’s duties, compulsory insurance and direct action against liability insurers, thus providing a cruise passenger with stronger protection and making it easier for him/her to understand just which his/her rights are. However, the regime of cruise carrier’s liability in this paper still needs some improvement because of some slight imperfections. This article aims to give a somewhat comprehensive study on the liability framework of the cruise carrier in the Proposal and, where necessary, compare with the current Maritime Law and the 2002 Athens Protocol, focus on the responsibility period of the cruise carrier, the relevant obligations, the application of the laws in various sections of the cruise journey, the grounds for responsibility, the limit of liability, compulsory insurance and direct claims against liability insurers.

An Octree-Based Two-Step Method of Surface Defects Detection for Remanufacture

Yan He,Wen Ma,Yufeng Li,Chuanpeng Hao,Yulin Wang,Yan Wang 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.10 No.2

Accurate and quick detection has a significant bearing on overall productivity of remanufacture. 3D scanning technologies have been widely applied in defects detection by comparing the damaged model with the nominal model. In this process, a huge amount of point cloud data is required to ensure detection accuracy whereas resulting in large storage space and long processing time of detection. This paper proposed an efficient two-step method based on octree to detect defects accurately and quickly for remanufacturing. In this method, the damaged point cloud and the nominal point cloud are first registered. Then a two-step detection approach is developed to extract the surface defects, coarse detection and detailed extraction, where the octree method is applied to create an effective topology of discrete points and perform the Boolean operation for defects extraction. In coarse detection, rough location and size information of the defects are acquired from the whole point cloud data. Based on coarse detected boundary box containing defects, the detailed extraction step is applied to extract corresponding defects shape accurately. The feasibility of proposed method was validated by using a case to detect defects of a damaged turbine blade and the detection results can be used to generate restoration tool path. The results show that the proposed method outperforms state-of-art defects detection methods, which can reduce time by 74.03% and reduce error by 36.86%, respectively.

Random dynamic analysis of multi-span bridge under track irregularity and horizontal traveling seismic waves

Ma, Chun Yan(마춘연),Mu, Di(모디),Choi, Dong Ho(최동호) 한국강구조학회 2020 한국강구조학회 학술대회 발표집 Vol.31 No.1

Effect of Dietary Concentrate:forage Ratios and Undegraded Dietary Protein on Nitrogen Balance and Urinary Excretion of Purine Derivatives in Dorper×thin-tailed Han Crossbred Lambs

Ma, Tao,Deng, Kai-Dong,Tu, Yan,Jiang, Cheng-Gang,Zhang, Nai-Feng,Li, Yan-Ling,Si, Bing-Wen,Lou, Can,Diao, Qi-Yu Asian Australasian Association of Animal Productio 2014 Animal Bioscience Vol.27 No.2

This study aimed to investigate dietary concentrate:forage ratios (C:F) and undegraded dietary protein (UDP) on nitrogen balance and urinary excretion of purine derivatives (PD) in lambs. Four Dorper${\times}$thin-tailed Han crossbred castrated lambs with $62.3{\pm}1.9$ kg body weight at 10 months of age were randomly assigned to four dietary treatments in a $2{\times}2$ factorial arrangement of two levels of C:F (40:60 and 60:40) and two levels of UDP (35% and 50% of CP), according to a complete $4{\times}4$ Latin-square design. Each experimental period lasted for 19 d. After a 7-d adaptation period, lambs were moved into individual metabolism crates for 12 d including 7 d of adaption and 5 d of metabolism trial. During the metabolism trial, total urine was collected for 24 h and spot urine samples were also collected at different times. Urinary PD was measured using a colorimetric method and creatinine was measured using an automated analyzer. Intake of dry matter (DM) (p<0.01) and organic matter (OM) (p<0.01) increased as the level of UDP decreased. Fecal N was not affected by dietary treatment (p>0.05) while urinary N increased as the level of UDP decreased (p<0.05), but decreased as dietary C:F increased (p<0.05). Nitrogen retention increased as dietary C:F increased (p<0.05). As dietary C:F increased, urinary excretion of PD increased (p<0.05), but was not affected by dietary UDP (p>0.05) or interaction between dietary treatments (p>0.05). Daily excretion of creatinine was not affected by dietary treatments (p<0.05), with an average value of $0.334{\times}0.005$ mmol/kg $BW^{0.75}$. A linear correlation was found between total PD excretion and PDC index ($R^2$ = 0.93). Concentrations of creatinine and PDC index in spot urine were unaffected by sampling time (p>0.05) and a good correlation was found between the PDC index (average value of three times) of spot urine and daily excretion of PD ($R^2$ = 0.88). These results suggest that for animals fed ad libitum, the PDC index in spot urine is effective to predict daily excretion of PD. In order to improve the accuracy of the spot sampling technique, an appropriate lag phase between the time of feeding and sampling should be determined so that the sampling time can coincide with the peak concentration of PD in the urine.

A Study on the Civil Liability of Freight Forwarders under Chinese Law - Focus on the Regulations on the Trial of Disputes over Ocean Freight Forwarding - 1

Yan-Qiu Ma,Yan-An Yu 한국해사법학회 2016 해사법연구 Vol.28 No.3

오늘날, 해상화물 운송주선인은 해상운송 시장 내 경쟁이 심화됨에 따라 그 의 업무 범위도 많이 변화되어, 화주와 운송업자 간의 연결 뿐만 아니라 많은 업무를 수행하고 있는데, mere agent, contracting carrier 및 performing carrier 등의 업무를 수행하면서 여러 가지 법적 문제가 발생 할 수 있다. 이러한 배경 을 바탕으로 중국최고법원은 해상화물 운송주선인의 분쟁의 재판에 관한 법규 를 제정하였다. 본 연구의 목적은 이 법규를 소개하고 해상화물 운송주선인의 정의 및 법적 책임, 운송 서류의 송달 지연, FOB 조건 하에서의 운송 서류의 송달, 화물의 멸실 및 훼손의 고지 및 해상화물 운송주선에 관한 분쟁의 시효 및 관할권에 대하여 논하고자 한다. With the highly competitive market, the functions of the freight forwarders have changed a lot. They are not only the link between the owner of the goods and the carrier, but also undertake many duties and can act as the mere agent, the contracting carrier or the performing carrier, while these may led to the arguments in judicial procedure with economic disputes. On such basis, the Supreme People’s Court of China had promulgated the Regulations concerning the trial of disputes over ocean freight forwarding. This article aims to outline the highlights of the Regulation on the identification of freight forwarders and their civil liability, and hope to answer and explain the detention of documents, the delivery of transport documents under FOB Terms, notice of loss or damage, time bar and jurisdiction over disputes of freight forwarding service.

High-j Proton h11/2 and g7/2 Intruder Bands in 113In

Ma Ke Yan,Lu Jing Bin,Ma Ying Jun,Li Jian,Yang Dong,Sun Wu Ji,Wang Hao,Pan Hao Nan,Wang Jia Qi,Yang Qing Yu,Zhang Da Ming,Zhu Li Hua,Wu Xiao Guang,Zheng Yun,Li Cong Bo 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.12

Excited states of 113In have been populated through the heavy-ion fusion evaporation reaction 110Pd(7Li, 4n)113In. A new band with the configuration of a proton d5/2 orbital is identified. Two ΔI = 2 intruder bands, built on the πh11/2 and the πg7/2 orbitals, have been extended to spins (63/2-)ħ and (55/2+)ħ, respectively. The negative-parity πh11/2 intruder band shows a smooth increase in aligned spin, which is attributed to a strong proton-neutron interaction. The properties of the positive-parity πg7/2 band are discussed based on tilted axis cranking model calculations, and the features of the antimagnetic rotation for this band are shown after backbend. Furthermore, the contributions of the two-shears-like mechanism, the neutron (gd)ν shell and the core rotation are investigated for the positive-parity πg7/2 band.

Microstructure and Biocompatibility of Porous Ti-Nb-Zr-CPP Composite Fabricated by Spark Plasma Sintering and Leaching Process

( Yan Hua Ma ),( Kee Do Woo ),( Dong Soo Kang ),( Sang Mi Kim ) 대한금속재료학회(구 대한금속학회) 2013 대한금속·재료학회지 Vol.51 No.5

Metallic biomaterials such as titanium and its alloys have been widely used as permanent implant materials due to their excellent corrosion resistance, fatigue property, and strength. Calcium pyrophosphate (CPP) is an attractive bioceramic for human tissue implantation due to its good biocompatibility and similar composition to human bone. High energy mechanical milling and spark plasma sintering (SPS) can be used to fabricate a sound composite of the Ti-Nb-Zr-CPP. In a biomaterial such as the Ti-6Al-4V ELI alloy, the coating property between the bioceramic and Ti-based alloy is very important. By addition of CPP to the Ti-Nb-Zr alloy, the Ti-Nb-Zr alloy can improve the wetability between the Ti alloy and bioceramic as a coating material. Also the porous surface of the biomaterials can improve the symphyseal ability with osteoblast. In this study, a porous surface can be made by using several different leaching solutions such as aqueous diluted H3PO4. Ti-Nb-Zr-CPP composite was fabricated by spark plasma sintering (SPS) at 1000 ℃ under 70 MPa using high energy mechanical milled powder. A porous surface was successfully fabricated by using a 40 vol%H3PO4+ 60 vol.%H2O leaching solution at room temperature for 24 h.

Stochastic dynamic responses of a train-track-bridge system under spatially varying ground motions

Ma, Chun Yan(마춘연),Mu, Di(모디),Choi, Dong Ho(최동호) 한국강구조학회 2021 한국강구조학회 학술대회 발표집 Vol.32 No.1