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      • KCI등재

        Experimental Studies on Progressive Collapse Behavior of RC Frame Structures: Advances and Future Needs

        Wei?Jian Yi,Fan Yi,Yun Zhou 한국콘크리트학회 2021 International Journal of Concrete Structures and M Vol.15 No.4

        In the recent two decades, the progressive collapse of reinforced concrete (RC) frame structures attracted unprecedented research interests in the structural engineering community. Experiments are regarded as an essential method in this field since actual cases can barely provide sufficient and effective data to support rigorous research. In this paper, prevailing experimental assumptions and configurations among over 100 series of experiments are quantitatively revealed by a bibliometric collection based on systematic search in an academic database. Since numerous experiments have been reported on the progressive collapse of RC frame structures, this paper subsequently presents a state-of-the-art review summarizing both experimental consensuses and controversies constituted by three main aspects: (a) static mechanisms, (b) dynamic behavior, and (c) threat-dependent research. The significance of secondary mechanisms, existing problems of dynamic effects, and potential flaws of the threat-independent assumption are discussed in detail with experimental findings. Future needs are emphasized on research targets, correlations between experiments and design, dynamic effects, threat-dependent issues, and retrofitting. These recommendations might help researchers or designers realize a more reliable and realistic progressive collapse design of RC frame structures in the future.

      • The Regression Analysis of Sampling Linearity on Digital Single Board of TD Network by MINITAB

        Wei,Hui Wang 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.1

        As a two-way amplifier, TMB is located on the top of the tower outdoors, it plays an indispensable part in TD station. Besides amplifying the signals in the Radio- Frequency channels, TMB transmits pilot signals, detection signals and power signals between base stations. This article verifies involved indicators on one single board with regression analysis method based on previous tests of digital board and RF board in TMB. To improve prediction and accuracy in controlling, this article illustrates the interdependent relationship between input voltage of digital single board and sampling value by a deep analysis of simple linear regression and the mathematical model.

      • KCI등재

        Microstructure and Mechanical Properties of Cold Drawn Ti–Nb–Ta–Zr–O Wires for Orthodontic Applications

        Wei‑dong Zhang,Junye Ren,Bin Liu,Yong Liu,Zhenggang Wu,Jingwen Qiu 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.7

        Ti–36Nb–2Ta–3Zr–0.35O (TNTZO) alloy is an excellent candidate for biomedical applications. In this study, a new methodcombining cold-swaging and cold-drawing was used to fabricate the TNTZO alloy wires with 0.3 mm diameter for orthodonticapplications. The microstructure and mechanical properties of cold-drawn and annealed TNTZO wires (referred toas TNTZO0.3and TNTZO0.3(HT), respectively) were investigated. The results show that the microstructure of cold drawnTNTZO0.3consists of main-sized elongated grains with 70 nm width. After annealing at 700 °C for 5 min, the microstructureof TNTZO0.3(HT) wires becomes equiaxial with a grain size of ~ 5 μm. The cold drawn TNTZO0.3wires exhibit improvedmechanical properties, higher tensile strength (about 1000 MPa) and similar elastic modulus (69 GPa), compared to annealedTNTZO0.3(HT) wires. Besides, TNTZO0.3has higher creep resistance and lower stress exponent (around 2), compared to Tiwires and TC4 wires with the same diameter. These results prove that TNTZO0.3wires have most of the ideal characteristicsof orthodontic wires.

      • KCI등재

        Preparation and photocatalytic activity of a novel BiOCl/g‑C3N4 thin film prepared via spin coating

        Wei‑Qin Cai,De‑Fang Zhang,Feng‑Jun Zhang,Won‑Chun Oh 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.3

        Novel BiOCl/g-C3N4 thin film photocatalysts were synthesized via a simple two-step spin coating method. The prepared photocatalysts were characterized by X-ray diffraction, scanning electron microscopy, and ultraviolet–visible spectroscopy. The photocatalytic activity of the thin films for the degradation of rhodamine B under visible light (λ ≥ 400 nm) was investigated. The results showed that the BiOCl/g-C3N4 thin film photocatalysts exhibited significantly improved visible light absorption compared to the pure BiOCl thin film. The BiOCl/g-C3N4 film showed a rhodamine B degradation efficiency of 81.0% under visible light, which is 23.8 times higher than that of the pure BiOCl thin film. This excellent photocatalytic activity of the BiOCl/g-C3N4 film can be attributed to its efficient electron–hole separation due to the presence of g-C3N4.

      • KCI등재

        Identification of candidate odorant‐degrading enzyme genes in the antennal transcriptome of Aphidius gifuensis

        Kang Zhi‐Wei,Liu Fang‐Hua,Xu Yong‐Yu,Cheng Jia‐Hui,Lin Xiao‐Li,Jing Xiang‐Feng,Tian Hong‐Gang,Liu Tong‐Xian 한국곤충학회 2021 Entomological Research Vol.51 No.1

        Odorant‐degrading enzymes (ODEs) have been found in insect antennae and play a critical role in signal chemical degradation once the message is conveyed. Significant progress has been made in characterizing ODEs in a variety of pests but very little is known in their natural enemies. We have carried out an antennae‐ and sex‐specific transcriptome of Aphidius gifuensis, a natural enemy of aphid, to identify the candidate ODEs. Based on the antennae‐ and sex‐specific transcriptome, a total of 100 putative ODEs were identified including one aldehyde oxidase (AOX), four alcohol dehydrogenases (ADs), eight UDP‐glucuronosyltransferases (UGTs), 45 cytochrome P450 (P450s), nine glutathione S‐transferases (GSTs) and 40 carboxylesterases (CCEs or CXEs). Additionally, we used RT‐qPCR to determine the expression profiles of these genes in tissues of both sexes. Based on the phylogenic analysis and tissue‐expression patterns, AgifEstE4, AgifCXE3, AgifCCE4, AgifCCE7, and AgifCCE18 were suggested as key ODEs in A. gifuensis. In addition, the female or male specifically enriched genes, such as AgifCCE17, AgifEstB1, AgifCYP18a1, AgifUGT2C2, were also considered to involve in the chemosensory processing in A. gifuensis. This study not only identified the candidate ODEs in A. gifuensis but also provided source for further exploration of the molecular mechanisms of chemical signal transductions in A. gifuensis, as well as other hymenopteran species.

      • THE INFLUENCE OF WEATHER ON THE EFFECTIVENESS OF MULTIPLE ADVERTISING CHANNELS

        Felix Rafael Maria Weißmüller,Lisa Stoll 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07

        Previous studies showed that poor weather conditions lead to increased online browsing behavior, which again enhances the likelihood for consumers to see an online advertisement (Ghose & Todri, 2016; Weißmüller et al., 2017). The authors assume that these changes in media consumption behavior effect not only one but many advertising channel simultaneously. Therefore, the authors investigate in this study how weather influences the effectiveness of several advertising channels at the same time. Specifically, they use field data over two years from an online streaming provider to capture advertising-spending, and -reach, as well as subscriptions. Furthermore, weather data from different weather stations across Germany are matched with customer data. The authors analyze five different advertising channels: television, email, affiliate, online display and search engine. By applying a count regression, preliminary empirical evidence suggests that weather-induced changes in media consumption leverages advertising effectiveness.

      • Blocking of Cell Proliferation, Cytokines Production and Genes Expression Following Administration of Cordyceps Sinensis in the Bronchoalveolar Lavage Fluids Cells

        Kuo, Yuh-Chi,Wu, Chia-Lin,Tasi, Wei-Jern,Wang, Jir-Yenn,Chang, Shi-Chung,Lin, Ching-Yuang,Shiao, Ming-Shi 경희대학교 동서의학연구소 1999 INTERNATIONAL SYMPOSIUM ON EAST-WEST MEDICINE Vol.1999 No.1

        Yuh-Chi Kuo¹,Chia-Lin Wn¹,Wei-jern Tasi¹,Jir-Yenn Wang²,Shi-Chung Chang₃,Ching-Yung Lin⁴,and Ming-Shi Shiao⁴¹National Research Institute of Chinese Medicine, ²Department of Biology,Fu Jen University, ³Department of Chest, ⁴Department of Pediatrics, □De[art,amt of Medical Research and Education. Taipei Veterans General Hospital, Taipei, Taiwan Yuh-Chi Kuo¹,Chia-Lin Wn¹,Wei-jern Tasi¹,Jir-Yenn Wang²,Shi-Chung Chang²,Ching-Yung Lin³,and Ming-Shi Shiao⁴.¹National Research Institute of Chinese Medicine, ²Department of Biology,Fu Jen University, ³Department of Chest, ⁴Department of Pediatrics, □De[art,amt of Medical Research and Education. Taipei Veterans General Hospital, Taipei, Taiwan. Blocking of Cell Proliferation, Cytokines Production and Genes Expression Following Administration of Cordyceps sinensis in the Bronchoalveolar Lavage Fluids Cells. Proceedings of international Symposium on East-West Medicine, Seoul. 44-64, 1999.-Cordyceps sinensis is a major parasitic fungus on larva of Lepidoptera. It is one of the well know fungi used in traditional Chinese medicine for treatment asthma, lung and kideney diseases. Many fungi belonging to the genus Cordyceps have been demonstrated to produce natural products with various biological activities. Reported biological activities of genus cordyceps include:(a)inhibition of DNA and RNA synthesis;(b)enhancement of cell differentiation;(c)restruction of cytoskeleton;(d)inhibition of protein kinase activity;(e)antitumor activity on bladder, colon, lung carcinoma as well as fibroblastoma;(f)inhibition of the infection and revers transciptase activity of human immunodeficiency virus type 1; and(g) inhibition of methylation of nucleic acid. Thus, it is suggested that the extracts of Cordyceps sp. Contain antitumor, antiviral, and many other biological activities. In our previous studies, we proved that C. sinensis contains the antitumor and immunomodulatory agents. In the present studies, effects of C. sinensis on bronchoalveolar lavage fluids(BAL)cells were demonstrated. The crude methanolic extracts of C. sinensis were fractionated into 15 fractions by silica gel column chromatography. Effects of various fraction on BAL cells proliferation and lipopolysaccharide(LPS) stimulated interleukin-1β(IL-8),platelet activating factor(PAF), interleukin-6(IL-6), tumor necrosis factor-α(TNF-α),and interleukin-8(IL-8) production on BAL cells were determined. The result indicated that the CS-19-22 fraction suppressed BAL cells proliferation activated by LPS. The median inhibitory concentration(IC50) was 6㎍/ml. The CS-19-22 fraction also decreased IL-1β,PAF,IL-6, TNF-αand IL-8 production.The results of revers transcription-polymerase chain reaction(RT-PCR) demonstrated that the CS-19-22 fraction did not affect IL-1β,PAF,IL-6, TNF-α,and IL-8 mRNAs expression in BAL cells activated by LPS. By contrast, it inhibited the IL-10 mRNA expression but enhanced IFN-γand IL-12 mRNAs expression in activated BAL cells. Moreover, the CS-19-22 fraction blocked PAF-induced platelet aggregation. It is unlikely that cytotoxicity was involved. Because no cell deths were observable. We hypothesize that inhibitory mechanisms of CS-19-22 on BAL cells proliferation may be related to the impairments of gene expression and production of cytokines in BAL cells. The explanation of C. sinensis antiasthma function may involved the following(1)C.sinenesis contained immunomodulatory agents that stimulated IFN-γand IL-12 expression in TH1cells.(2)Enhanced secretion of IFN-γand IL-12 will inhibit the Tγcells immune responses Ex. Decreasing of IL-6 and IL-10 production.(3) The impairments of cytokines production in TH2 cells suppressed th BAL cells proliferation then more cytokines production Ex.IL-1β,PAF,IL-6,TNF-αand IL-8 in activated BAL cells were decreased. (4)The suppression of TH2cells immune responses will inhibit the growth and differentiation of B cells then IgE production will be decreased. (5)Reduced production of IgE will decreased asthma attack occurring in individuals. However, the results of the present study suggested that C. sinensis may also have acted to treat asthma in part by inhibiting BAL cells proliferation and cytokine gene expression and production. Future, experiments with treatment of animals with asthma with C. sinensis will be necessary to defined whether C. sinensis can reduce asthma injury. Plans are underway for the isolation of pure principal growth inhibitors and their mechanisms of action are subjected for further study.

      • MAKING ADVERTISEMENT MESSAGES MORE EFFECTIVEBY WEATHER-DEPENDENT FRAMING

        Felix Weißmüller 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7

        Large companies like Nike, Walmart or the German media company Hubert Burda have recently started to use weather data to predict sales and to advertise certain products and services. Technical innovations in particular geo-targeting via GPS and mobile display advertising enable and boost this emerging trend. However, weather not only influences what services and products consumers buy, but also their motivation, mood and risk-taking behavior. Until now there is limited knowledge about the causal effect of weather and so to answer the question: How should advertisers frame their messages depending on the weather condition to increase advertising effectiveness? This study is the first one which addresses this question by conducting a laboratory experiment with 200 participants. The results unravel the underlying mechanism of weather suggesting that good (bad) weather positively (negatively) influences mood, lowers (rises) risk perception and changes motivation/aspiration (i.e., regulatory focus). Most important for advertiser, we found that gain-framed messages were more effective in good weather situation, whereas loss-framed messages were more effective in bad weather.

      • 朝鮮時代漢語敎科書與近代漢語硏究

        汪維輝 연세대학교 인문과학연구소 2002 人文科學 Vol.84 No.-

        引言 중한양국은 매우 오랫동안 교류해왔지만 두 나라의 언어 체계가 틀려서 교류에 있어 언어가 하나의 장벽이 되어왔다. 본고에서는 당시 중국어를 배우기 위한 한국에서의 중국어 교과서에 대한 소개를 하고 이러한 교과서의 연구자료상 가치와 그 연구현황에 대해 토론하고자 한다. 2.조선시대의 중국어 교과서 2.1 「老乞大」, 「朴通事」 가장 유명하고 가장 오래된 중국어 교과서로 그 제작연대는 중국의 원 말기의 至元연간으로 추정된다. 정통 중국어 입말이 위주이며 蒙古語의 영향도 보인다. 그 내용은 일상회화로 여행, 무역, 풍속관습, 典章制度 등을 포괄하고 있는데 『朴通事』의 내용이 『老乞大』보다 광범위하고 심도가 깊어 『朴通事』가 고급과정이라면 『老乞大』는 초급과정에 속한다. 특히 최근 한국에서 개인이 소장했던 古本 『老乞大』가 발견되었는데, 이는 앞으로 주요한 연구주제가 될 것으로 보인다. 2.2 『訓世評語』 (上·下, 1473/1518) 1473년 6월에 편찬되었으며 65가지의 고사가 수록되었는데, 名賢과 節婦에 관한 이야기가 주 내용이며 일부 유머가 넘치는 전설도 있다. 이 책을 다른 중국어 교과서와 체례상 많은 차이를 보이는데 이는 작가 李邊의 독창적인 작품이라는 것을 말해준다. 이 책은 대화체가 아니라 이야기를 하는 문체로 言文對照를 해놓았다. 사상적인 면을 중시하는 점에서 학문적 소양이 풍부한 학자가 쓴 희귀한 중국어교과서 자료로 보인다. 2.3 『華音啓蒙諺解」 (上 ·下, 1883) 李應憲의 저작 『業音啓蒙』에 대한 諺解本으로 모두 40페이지에 달한다. 이책은 '부열'라는 용어사용과 俗字가 많이 나타나는 점이 주의할 만하다. 2.4 『이니귀성』과 『學淸』 『이니귀성』은 1冊, 34페이지에 달한다. 책제목은 회화부분의 한 문장을 따서 만들었다. 『華音啓蒙』과 같이 북방 방언투의 사투리가 있는데 『이니귀성』과 『華音啓蒙』은 내용과 연대가 비슷하며 방언도 유사하여 비교연구의 가치가 있다고 하겠다. 『學淸』은 『이니귀성』의 手記本으로 '學習淸語'를 줄인 것으로 회화부분에는 『이니귀성』 1, 3부분만 수록되어있다. 위의 『華音啓蒙諺解』, 『이니귀성』, 『學淸』은 아직 연구가 되어있지 않다. 3. 자료의 가치와 연구상황 近代中國語의 分期에 대해서는 아직 일치된 견해가 없는 실정이다. 그러나 조선시대의 중국어교과서는 중국 근대중국어시기,즉 元, 明, 淸 三代의 중국어발전사상 중요한 자료가 된다. 『老乞大』의 연구상황을 간략히 요약하면 다음과 같다. 3.1 음운 『老乞大諺解』와 『朴通事諺解』로 明代의 음운을 연구할 수 있다. 그 연구 결과로 (1)濁聲母가 淸化되었으며 (2) 疑母가 소실되었다. (3) 捲舌音이 형성되기 시작했고 (4) -m운미가 -n운미로 합병되었다. (5) 入聲 운미가 소실되었다. 그러나 梅祖麟과 遠藤光曉가 『飜譯老乞大朴通事』의 諺文 주음과 성점을 텍스트로 중국어 성조에 대한 연구를 하여 調値를 재구했는데 특히 入聲에 대한 의견에서 차이를 보인다. 梅祖麟은 입성을 1개로 재구했고 遠藤光曉는 2가지로 재구하였다. 3.2 어법 虛詞에 대한 연구가 주로 진행되었다. 3.3 어휘 특수단어에 대한 考釋을 중심으로 연구를 진행했다. 4. 연구전망 4.1 자료의 발굴, 정리, 발간 4.2 한중협력 - 당시 韓國語 千涉의 유무에 관한 硏究, 韓中比較硏究

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