Ultrastructure structure of antennal sensilla of carabid beetle Carabus elysii Thomson, 1856 (Coleoptera: Carabidae)

Wen‐Bo Li,Naiyi Liu,Qin XU,Min Sun,Jie Fang,Shuyan Wang 한국곤충학회 2019 Entomological Research Vol.49 No.2

The sensilla type, number and distribution in male and female adults of Carabus elysii Thomson, 1856 (Coleoptera: Carabidae) were studied using scanning electron microscopy. The results showed that there are seven categories and 12 types of sensilla in C. elysii adults: three types of S.Ch, three types of S.T, two types of S.B and one each of B.B, S.Co, S.Ca and S.Cam. There is no difference between male and female in the types of sensilla. Apart from the significant difference in the number and distribution of S.B.2, S.Co and S.Ca between male dorsal and ventral surfaces, there are no significant differences between male and female antennae. In general, the number of sensilla in females is larger than that in males. The results provide a basic reference for future ultrastructure, electrophysiological, and comparative behavioral studies of Carabus species.

Investigation of Cu Interlayer on Joint Formation of Ti/Mg Bimetal Fabricated by Liquid–Solid Compound Casting Process

Fulin Wen,Jianhua Zhao,Kaiqing Feng,Miaowang Yuan,Dengzhi Zheng,Cheng Gu,Bei Xu 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

In this paper, TC4/AZ91D bimetallic composites has been prepared by liquid–solid compound casting process adaptingvarious thickness of Cu coating. The effects of Cu coating thickness on the evolution of interface microstructures and jointmechanical properties are investigated. The results indicate that metallurgical bonded joints are obtained with Cu coatingthickness ranging from 36.7 to 51.4 μm. With the increase of Cu coating thickness, the interface microstructure evolvesfrom δ-Mg + Mg2Cueutectic structure to Mg–Cu intermetallic compound (IMC) Cu2Mg+ Mg2Cuand Mg–Al–Cu ternaryintermetallic compound. The calculation results of formation enthalpy and chemical potential of Mg–Al–Cu system suggestthat Cu element prefers to react with Mg element and formed Mg–Cu IMC. In particular, when Cu coating thickness reaches36.7 μm, the average shear strength of the bimetal reaches a maximum of 65.3 MPa. Further increasing Cu coating thicknessleads to the generation of thick Mg2CuIMC layer and Mg2Cu+ Cu2Mgmixed IMC layer which are proved to be harmful tothe shear strength of TC4/AZ91D bimetals. All the fracture surfaces of the bimetallic composites exhibite to have a brittlefracture morphology. However, the fracture location is different with each other. For Cu coating thickness of 36.7 μm, theinterface fractures at the δ-Mg + Mg2Cueutectic structure, while the interface fractures at the Cu2Mg+ Mg–Al–Cu ternaryintermetallic layers when Cu coating thickness is 44.2 μm and 51.4 μm.

한국어교육의 화행교육 연구 동향 분석

허문하 배재대학교 주시경교양교육연구소 2017 대학교양교육연구 Vol.2 No.1

이를 위해 1990년부터 2016년까지의 석⋅박사 학위 논문 150편과 학술지논문 60편, 총 210편의 논문을 수집하여 크게 연도별⋅유형별, 학습자 특성별, 화행 유형별, 연구 주제별로 분류하고 분석하였다. 연도별 분석에서는 1990년대, 2000년대, 2000년대 이후로 분류 기준을 정하였고, 유형별 분석에서는 학위논문과 학술지 논문으로 나누었다. 학습자 특성별 분석에서는 언어권과 숙달도로 나누었고, 화행 유형별 분석에서는 크게 제시화행, 지시화행, 위임화행, 정표화행으로 나누었으며 연구 주제별 분석에서는 화행교육일반, 교수학습, 교육자료, 그리고 학습 자 요인으로 나누었다. 이 분류 기준을 바탕으로 지금까지 화행 관련 연구들이 어떻게 발전해 왔는지, 그리고 주로 어떤 영역, 어떤 주제로 이루어져 왔는지에 대해 살펴봄으로써 향후 한국어교육의 화행교육이 나아갈 방향에 대한 제언을 제시하였다. The purpose of this study is to analyse the current trend of the research regarding on Speech Act Education in Korean language Education. For this purpose, 150 dissertations for a Masters and Doctorate published from 1990 to 2016 and 60 studies published in the journals were analysed. These study results were categorized into four types. The first classification was done by year and research types. The second classification was done by the characteristics of Korean Learners. The third classification was done by the type of Speech Act and the last classification was done by the topics of studies. First, by the type of year, it was divided into during the 1990s, during the 2000s, and after 2000s. By the type of research types, it was divided into dissertations and theses. Second, by the characteristics of Korean Learners’ type, it were divided into language area and proficiency. Third, by the type of Speech Act, it was divided into assertives, directives, commissives, exercitives. Finally, by the topics of studies, it were divided into Speech Acts education genericness, teaching and learning, teaching material and learner factors. Based on this classification criteria, we have looked at how the studies of Speech Act have evolved, what areas of the studies have been covered and what topics have been researched. Finally, this study would like to suggest a few suggestions on Speech Act Education by further study.

Insufficient radiofrequency ablation-induced autophagy contributes to the rapid progression of residual hepatocellular carcinoma through the HIF-1α/BNIP3 signaling pathway

( Wen-lei Xu ),( Shao-hong Wang ),( Wen-bing Sun ),( Jun Gao ),( Xue-mei Ding ),( Jian Kong ),( Li Xu ),( Shan Ke ) 생화학분자생물학회(구 한국생화학분자생물학회) 2019 BMB Reports Vol.52 No.4

Currently speaking, it is noted that radiofrequency ablation (RFA) has been the most widely used treatment for hepatocellular carcinoma (HCC) occurring in patients. However, accumulating evidence has demonstrated that the incidence of insufficient RFA (IRFA) may result in the identified rapid progression of residual HCC in the patient, which can greatly hinder the effectiveness and patient reported benefits of utilizing this technique. Although many efforts have been proposed, the underlying mechanisms triggering the rapid progression of residual HCC after IRFA have not yet been fully clarified through current research literature reviews. It was shown in this study that cell proliferation, migration and invasion of residual HepG2 and SMMC7721 cells were significantly increased after the IRFA was simulated in vitro. In other words, it is noted that IRFA could do this by enhancing the image of autophagy of the residual HCC cell via the HIF-1 α/BNIP3 pathway. Consequently, the down-regulation of BNIP3 may result in the inhibition of the residual HCC cell progression and autophagy after IRFA. Our present study results suggest that IRFA could promote residual HCC cell progression in vitro by enhancing autophagy via the HIF-1 α/BNIP3 pathway. For this reason, it is noted that the targeting of the BNIP3 may be useful in preventing the rapid growth and metastasis of residual HCC after IRFA. [BMB Reports 2019; 52(4): 277-282]

Mechanical and Rheological Properties of Glass Fiber-Reinforced Flowable Mortar (GFRFM): Optimization Using Taguchi Method

Wen Xu,Mostafa Jalal,Linbing Wang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.1

In this study, an attempt was made to link the strength to the rheological properties of glass fiber-reinforced flowable mortar (GFRFM), and optimize the strength using the Taguchi method. With this regard, first the main factors influencing the rheology, including superplasticizer (SP) ratio, water-binder ratio (w/b), and fiber volume percentage (Vol.%) were identified. Then, by setting three levels for each factor and using L9 Taguchi array, 9 groups of experiments were designed and conducted on GFRFM mixes. The rheology of each mix was measured using the mini slump and mini V-funnel tests, and the strength was measured using compression and split tensile tests. Afterwards, the analysis of variance (ANOVA), optimization, and prediction of the mechanical and rheological properties were performed. Finally, the optimum levels of the factors for the maximum strength were found as SP = 16 mL/kg of binder, fiber Vol.% = 0.5, and w/b = 0.35, and the corresponding rheological properties were determined. It was found that the optimum rheology occurs between the minimum and maximum values. Microstructural assessment of the mixes conducted using scanning electron microscope (SEM) also indicated a denser microstructure of the optimum mix.

Alloying Behavior and Properties of FeSiBAlNiCox High Entropy Alloys Fabricated by Mechanical Alloying and Spark Plasma Sintering

Wen Wang,Boyu Li,Sicheng Zhai,Juan Xu,Zuozhe Niu,Jing Xu,Yan Wang 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.5

In this paper, FeSiBAlNiCo x ( x = 0.2, 0.8) high-entropy alloy (HEA) powders were fabricated by mechanical alloying process,and the powders milled for 140 h were sintered by spark plasma sintering (SPS) technique. The microstructures andproperties of as-milled powders and as-sintered samples were investigated. The results reveal that the fi nal milling products(140 h) of both sample powders present the fully amorphous structure. The increased Co contents obviously enhance theglass forming ability and thermal stability of amorphous HEA powders, which are refl ected by the shorter formation time offully amorphous phase and the higher onset crystallization temperature, respectively. According to coercivity, the as-milledFeSiBAlNiCo x ( x = 0.2, 0.8) powders (140 h) are the semi-hard magnetic materials. FeSiBAlNiCo 0.8 HEA powders possessthe highest saturation magnetization and largest remanence ratio. The SPS-ed products of both bulk HEAs are composedof body-centered cubic solid solution, and FeSi and FeB intermetallic phases. They possess the high relative density above97% and excellent microhardness exceeding 1150 HV. The as-sintered bulks undergo the remarkable increase in saturationmagnetization compared with the as-milled state. The SPS-ed FeSiBAlNiCo 0.8 HEA exhibits the soft magnetic properties. The electrochemical corrosion test is carried out in 3.5% NaCl solution. The SPS-ed FeSiBAlNiCo 0.2 HEA reveals the betterpassivity with low passive current density, and the higher pitting resistance with wide passive region.

Effect of fermented biogas residue on growth performance, serum biochemical parameters, and meat quality in pigs

Xu, Xiang,Li, Lv-mu,Li, Bin,Guo, Wen-jie,Ding, Xiao-ling,Xu, Fa-zhi Asian Australasian Association of Animal Productio 2017 Animal Bioscience Vol.30 No.10

Objective: This study investigated the effect of fermented biogas residue (FBR) of wheat on the performance, serum biochemical parameters, and meat quality in pigs. Methods: We selected 128 pigs (the mean initial body weight was $40.24{\pm}3.08kg$) and randomly allocated them to 4 groups (1 control group and 3 treatment groups) with 4 replicates per group and 8 pigs per pen in a randomized complete block design based on initial body weight and sex. The control group received a corn-soybean meal-based diet, the treatment group fed diets containing 5%, 10%, and 15% FBR, respectively (abbreviated as FBR5, FBR10, and FBR15, respectively). Every group received equivalent-energy and nitrogen diets. The test lasted 60 days and was divided into early and late stages. Blood and carcass samples were obtained on 60 d. Meat quality was collected from two pigs per pen. Results: During the late stage, the average daily feed intake and average daily gain of the treatment groups was greater than that of the control group (p<0.05). During the entire experiment, the average daily gain of the treatment groups was higher than that of the control group (p<0.05). Fermented biomass residue did not significantly affect serum biochemical parameters or meat quality, but did affect amino acid profiles in pork. The contents of Asp, Arg, Tyr, Phe, Leu, Thr, Ser, Lys, Pro, Ala, essential amino acids, non-essential amino acids, and total amino acids in pork of FBR5 and FBR10 were greater than those of the control group (p<0.05). Conclusion: These combined results suggest that feeding FBR could increase the average daily gain and average daily feed intake in pigs and the content of several flavor-promoting amino acids.

Monitoring and control of wind-induced vibrations of hanger ropes of a suspension bridge

Xu G. Hua,Zheng Q. Chen,Xu Lei,Qin Wen,Hua W. Niu 국제구조공학회 2019 Smart Structures and Systems, An International Jou Vol.23 No.6

In August 2012, during the passage of the typhoon Haikui (1211), large amplitude vibrations were observed on long hangers of the Xihoumen suspension Bridge, which destroyed a few viscoelastic dampers originally installed to connect a pair of hanger ropes transversely. The purpose of this study is to identify the cause of vibration and to develop countermeasures against vibration. Field measurements have been conducted in order to correlate the wind and vibration characteristics of hangers. Furthermore, a replica aeroelastic model of prototype hangers consisting of four parallel ropes was used to study the aeroelastic behavior of hanger ropes and to examine the effect of the rigid spacers on vibration mitigation. It is shown that the downstream hanger rope experiences the most violent elliptical vibration for certain wind direction, and the vibration is mainly attributed to wake interference of parallel hanger ropes. Based on wind tunnel tests and field validation, it is confirmed that four rigid spacers placed vertically at equal intervals are sufficient to suppress the wake-induced vibrations. Since the deployment of spacers on hangers, server hanger vibrations and clash of hanger ropes are never observed.

Soul of Fire

Xu Wen 한국콘텐츠학회 2021 한국콘텐츠학회 ICCC 논문집 Vol.2021 No.12

唐代大橫吹部曲名考辨

Xu wen wu 한국중국언어문화연구회 2010 한중언어문화연구 Vol.- No.24

Since the Han Dynasty, the army’s music had already started to spread,HengChuiQu one of them. Sui Dynasty, when there are four departments in charge of music in the Tang Dynasty, there are five departments manage music. In the Tang Dynasty is very complicated, because a lot of music in the name of the inconsistency. Documented in the literature are not the same. Chen Yang’s 《YueShu》are more reliable than the New Book of Tang records, New Book of Tang proved to be wrong, but 《YueShu》is the right book. Ultimately prove to be, music recorded in the book is the real song name.