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Online education of art and design during COVID-19
Chen Dingding(첸딩딩),Pan Younghuan(반영환) 대한인간공학회 2020 대한인간공학회 학술대회논문집 Vol.2020 No.10
Objective: To recommend a measure of promoting online teaching to instructors of art and design. Background: During the COVID-19 pandemic, offline courses have changed to online courses for safety and health reasons. The demands of online teaching are very different for different majors. And art and design need to be in the measure, need more diversified combinations. Requirements: According to the demands of online teaching, put forward a variety of options for consideration. Conclusion: Lecturers should delegate the learning initiative to activate students" learning needs. Application: To provide better assistance in the teaching process of art and design for the lecturers.
A research on interaction of Chinese short-video App
Chen Dingding(첸딩딩),Pan Younghuan(반영환) 대한인간공학회 2018 대한인간공학회 학술대회논문집 Vol.2018 No.11
Objective: The aim of this study is to comparison of short-video App interface, for research the interaction of short-vi deo App. Background: According to the data, the Chinese social media short-video App"s penetration rate has increased by nearly twice in 2017, and the average daily online usage goes beyond the long video App. There are hundreds of short video apps going online in China. Comparison: The comparison between the TikTok, Kwai, and MeiPai. Focus on the s wipe and tap operation. Conclusion: Based on the analysis of the operation of these three short-video Apps, the short-video App is the center, the viewer and the producer all around it. Application: The results of the short-video interface analysis might help to conduct user research on interactive methods.
AE analysis of delamination crack propagation in carbon fiber-reinforced polymer materials
윤상재,Dingding Chen,한승욱,최낙삼,Kazuo Arakawa 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.1
Delamination fracture behavior was investigated using acoustic emission (AE) analysis on carbon fiber-reinforced polymer (CFRP)samples manufactured using vacuum-assisted resin transfer molding (VARTM). CFRP plate was fabricated using unidirectional carbonfiber fabric with a lay-up of six plies [+30/-30]6, and a Teflon film was inserted as a starter crack. Test pieces were sectioned from theinlet and vent of the mold, and packed between two rectangular epoxy plates to load using a universal testing machine. The AE signalswere monitored during tensile loading using two sensors. The average tensile load of the inlet specimens was slightly larger than that ofthe vent specimens; however, the data exhibited significant scattering due to non-uniform resin distribution, and there was no statisticallysignificant different between the strength of the samples sectioned from the inlet or outlet of the mold. Each of the specimens exhibitedsimilar AE characteristics, regardless of whether they were from the inlet or vent of the mold. Four kinds of damage mechanism wereobserved: micro-cracking, fiber–resin matrix debonding, fiber pull-out, and fiber failure; and three stages of the crack propagation processwere identified.
Xiong, Dingding,Yajima, Toshitaka,Lim, Byung-Kwan,Stenbit, Antine,Dublin, Andrew,Dalton, Nancy D.,Summers-Torres, Daphne,Molkentin, Jeffery D.,Duplain, Herve,Wessely, Rainer,Chen, Ju,Knowlton, Kirk U. Ovid Technologies Wolters Kluwer -American Heart A 2007 CIRCULATION - Vol.115 No.1
<P>Enterovirus infection is a cause of cardiomyopathy. We previously demonstrated that enteroviral protease 2A directly cleaves the cytoskeletal protein dystrophin. However, the direct effect of protease 2A in enteroviral cardiomyopathy is less clear because other viral proteins are also expressed with viral infection.</P>
An Accurate Method to Estimate Traffic Matrices from Link Loads for QoS Provision
Xingwei Wang,Dingde Jiang,Zhengzheng Xu,Zhenhua Chen 한국통신학회 2010 Journal of communications and networks Vol.12 No.6
Effective traffic matrix estimation is the basis of efficient traffic engineering, and therefore, quality of service provision support in IP networks. In this study, trafficmatrix estimation is investigated in IP networks and an Elman neural network-based traffic matrix inference (ENNTMI) method is proposed. In ENNTMI,the conventional Elman neural network is modified to capture the spatio-temporal correlations and the time-varying property, and certain side information is introduced to help estimate traffic matrix in a network accurately. The regular parameter is further introduced into the optimal equation. Thus, the highly ill-posed nature of traffic matrix estimation is overcome effectively and efficiently.
Lim, Byung-Kwan,Xiong, Dingding,Dorner, Andrea,Youn, Tae-Jin,Yung, Aaron,Liu, Taylor I.,Gu, Yusu,Dalton, Nancy D.,Wright, Adam T.,Evans, Sylvia M.,Chen, Ju,Peterson, Kirk L.,McCulloch, Andrew D.,Yajim American Society for Clinical Investigation 2008 The Journal of clinical investigation Vol.118 No.8
<P>The coxsackievirus and adenovirus receptor (CAR) is a transmembrane protein that belongs to the family of adhesion molecules. In the postnatal heart, it is localized predominantly at the intercalated disc, where its function is not known. Here, we demonstrate that a first degree or complete block of atrioventricular (AV) conduction developed in the absence of CAR in the adult mouse heart and that prolongation of AV conduction occurred in the embryonic heart of the global CAR-KO mouse. In the cardiac-specific CAR-KO (CAR-cKO) mouse, we observed the loss of connexin 45 localization to the cell-cell junctions of the AV node but preservation of connexin 40 and 43 in contracting myocardial cells and connexin 30.2 in the AV node. There was also a marked decrease in beta-catenin and zonula occludens-1 (ZO-1) localization to the intercalated discs of CAR-cKO mouse hearts at 8 weeks before the mice developed cardiomyopathy at 21 weeks of age. We also found that CAR formed a complex with connexin 45 via its PSD-95/DigA/ZO-1-binding (PDZ-binding) motifs. We conclude that CAR expression is required for normal AV-node conduction and cardiac function. Furthermore, localization of connexin 45 at the AV-node cell-cell junction and of beta-catenin and ZO-1 at the ventricular intercalated disc are dependent on CAR.</P>
An Accurate Method to Estimate Traffic Matrices from Link Loads for QoS Provision
Wang, Xingwei,Jiang, Dingde,Xu, Zhengzheng,Chen, Zhenhua The Korea Institute of Information and Commucation 2010 Journal of communications and networks Vol.12 No.6
Effective traffic matrix estimation is the basis of efficient traffic engineering, and therefore, quality of service provision support in IP networks. In this study, traffic matrix estimation is investigated in IP networks and an Elman neural network-based traffic matrix inference (ENNTMI) method is proposed. In ENNTMI, the conventional Elman neural network is modified to capture the spatio-temporal correlations and the time-varying property, and certain side information is introduced to help estimate traffic matrix in a network accurately. The regular parameter is further introduced into the optimal equation. Thus, the highly ill-posed nature of traffic matrix estimation is overcome effectively and efficiently.
Thermal Analysis Study of Modified Urea-Formaldehyde Resin
Wei Hong,Mianwu Meng,Dingding Gao,Qingye Liu,Caiyan Kang,Siyu Huang,Zhenming Zhou,Chunqiang Chen 한국고분자학회 2016 폴리머 Vol.40 No.5
In this study, the structures and thermal stability of pure urea-formaldehyde resin (PR) and modified urea-formaldehyde (UF) resin are investigated by differential thermal gravity (TG/DTG), and differential scanning calorimetry (DSC) supported by data from Fourier transform infrared spectroscopy. FTIR analysis indicate that the modifiers such as polydimethylsiloxane, dicyclohexylcarbodiimide and phenol have actively participated in the curing reactions. TG/DTG and DSC curve of UF resin show that its pyrolysis process is conducted in three steps: desiccation and dehydration, flash pyrolysis and slow decomposition. Compared with pure urea-formaldehyde resin (PR), modified UF resin exhibited good thermal stability. The activation energy (E) of modified UF resin acquired by Kissinger and Ozawa method was higher than that of PR. ΔH > 0, ΔS > 0 and ΔG > 0 in the thermal decomposition process of UF resin means that the decomposition reaction of UF resin before and after modification is a process of unnatural decalescence and entropy increase.