루머유형, 메시지 소구 유형이 루머 신뢰 및 확산 의도에 미치는 영향 수용자의 정보 처리 동기의 조절 효과를 중심으로

장금시 ( Jinchi Zhang ),조수영 ( Sooyoung Cho ) 한국PR학회 2017 PR연구 Vol.21 No.2

This study examined how the rumor types and message appeals influence on perceived credibility, word-of-mouth intention, and rebuttal word-of-mouth intention of a rumor. Also, the study employed an individual`s information processing motivation as a moderating variable. Results showed that first, rumor types had influences on perceived credibility and rebuttal word-of-mouth intention: Compared to a conspiracy rumor, people showed a higher credibility and stronger rebuttal word-of-mouth intention towards a contamination rumor. This suggests that a company need to actively deal with the contamination rumor that can bring more direct damage to the consumers. Second, the message appeals showed main effects on the three dependent variables. More specifically, compared to a rational appeal message, people showed a lower credibility and weaker word-of-mouth intention, but a stronger rebuttal intentions towards an emotional appeal rumor message. Third, there are interaction effects between two independent variables on the perceived credibility and rebuttal word-of- mouth intention. That is, in case of contamination rumor, people showed a higher credibility and weaker rebuttal intentions when it is formed in the way of a rational appeal rather than an emotional appeal. Finally, information processing motivation showed main effects on the three dependent variables. The interactions among the three variables were significant on perceived credibility and rebuttal word-of-mouth intention. More specifically, a person having a low information processing motivation showed a higher credibility and lower rebuttal word- of-mouth intention when a conspiracy rumor was formed in an emotional appeal. On the contrary, the same person showed a higher credibility and lower rebuttal word-of-mouth intention when a contamination rumor was formed in a rational appeal.

Thermodynamic analysis of a novel adiabatic compressed air energy storage system with water cycle

Zhen Xu,Haiyang Yang,Yingchun Xie,Jinchi Zhu,Chaoqun Liu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.6

A novel water cycle compressed air energy storage system (WC-CAES) is proposed to improve the energy storage density (ESD) and round trip efficiency (RTE) of A-CAES. The new system decreases electricity consumption by recovering and reusing the hydraulic pressure of water. The thermodynamic characteristics of WC-CAES are evaluated by energy and advanced exergy analysis method. When the air storage pressure of WC-CAES is equal to the minimum storage pressure of A-CAES (4.2 MPa), the ESD and generalized storage density increase by 5.85 % and 32.41 %, respectively. When the air storage pressure increases to the same level as A-CAES (7.2 MPa), ESD and generalized storage density increase by 112 % and 162 %, respectively. In addition, the RTE increases by 1.6 % when the air storage pressure is 4.2 MPa. WC-CAES is therefore verified to be an effective way to improve the performance of conventional A-CAES.

Lignin Based Flexible Electromagnetic Shielding PU Synergized with Graphite

Jia Zhang,Yunxia Qi,Yumei Zhang,Jinchi Duan,Bairun Liu,Baijun Liu,Zhaoyan Sun,Yiquan Xu,Wei Hu,Niaona Zhang 한국섬유공학회 2021 Fibers and polymers Vol.22 No.1

In this paper, lignin (L)-based polyurethane (FeGLPU) with excellent electromagnetic shielding properties wasprepared and studied. The modified reduced iron powder was modified with KH550, and then the obtained modified reducediron powder (Fe) was mixed with lignin, polyethylene glycol 200 (PEG200), hexamethylene diisocyanate (HDI) and graphite(G) to in-situ synthesize the FeGLPU. The thermal stability, mechanical properties, electronic conductivity, and morphologyof the composite FeGLPU were characterized in detail. The electromagnetic interference shielding effectiveness (EMI SE) ofFeGLPU was tested in the frequency range of 8.2-26.5 GHz. When the content of Fe and G was fixed at 10 % and the lignincontent was 5 %, the maximum EMI SE was 21.6 dB, and the frequency width of EMI SE greater than 10 dB was 18.3 GHz. The conductivity was 4.27×10-4 S/m, and the tensile strength of Fe10G10L5PU reached 11.7 MPa. When the lignin contentincreased to be 20 %, the maximum EMI SE was 22.5 dB, and the frequency width of EMI SE greater than 10 dB was18.3 GHz. The conductivity was 1.06×10-2 S/m, and the thermal decomposition temperature T5 (5 % weight loss) reached234 °C. The obtained excellent EMI SE should be due to the synergistic effect of Fe, G and lignin. It can be observed fromthe SEM observation that the G and Fe are uniformly dispersed in PU matrix with strong interfacial interaction. It wasillustrated that the prepared FeGLPU was with efficient electromagnetic shielding properties, good mechanical properties,and high thermal stability. This lignin based electromagnetic shielding PU was proposed to have broad application prospectsdue to its low expenses and ecology friendliness.

Comparison of landslide susceptibility maps using random forest and multivariate adaptive regression spline models in combination with catchment map units

Lei Chu,Liang-Jie Wang,Jiang Jiang,Xia Liu,Kazuhide Sawada,Jinchi Zhang 한국지질과학협의회 2019 Geosciences Journal Vol.23 No.2

Landslide susceptibility mapping (LSM) is a critical tool for mitigating the damages caused by geologic disasters. The selection of map units and mathematical models greatly affects the efficiency of LSM. To obtain the most appropriate combination of map units and mathematical models, four scales of catchment map units (CMUs) were analyzed and random forest (RF) and multivariate adaptive regression spline (MARSpline) models were applied in Gero City, Japan. The percentage of correctly identified landslides and the areas under the relative operating characteristic (ROC) curve were used to evaluate the model performances. The results indicate that the RF model had higher prediction accuracy than the MARSpline model, especially when the size of the CMU was 0.09 km2. A relatively high percentage of landslides fell into the high and very high landslide susceptibility classes (73%) and the lowest percentage of landslides fell into the very low landslide susceptibility classes (0.82%). The prediction-area (P-A) plots indicated that the prediction rates were higher for the RF model than the MARSpline model. The results of this study also suggest that the model accuracy can be increased if the appropriate CMU size is used. Therefore, the potential benefits of using the RF model in combination with the appropriate CMU size should be further explored using additional landslide-conditioning factors and other models.

Boundary effect on the seismic response of a three-dimensional soil slope with a shallow foundation on top

Shengyi Cong,Liang Tang,Xianzhang Ling,Lin Geng,Jinchi Lu 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.4

Numerical approaches are providing a versatile environment for conducting the studies of slopes and shallow foundations on thetop of slopes. However, there are few studies for assessing the boundary effects on the seismic response of a soil slope and thedynamic behaviors of a shallow foundation on top of three-dimensional (3D) slopes. On the basis of a systematic parametric study,Finite Element (FE) simulations are firstly conducted to evaluate the boundary effect on the seismic performance of the soil slope. Then, the boundary effects on the behaviors of a shallow foundation on top of a 3D slope under the earthquake loadings areaddressed. The results show that for a given 3D soil slope, fixing the displacement degrees of freedom only in the y-direction(perpendicular to the shaking direction) at the lateral boundaries is inappropriate, because this approach does not consider the 3Deffect. A smaller slope’s width/height ratio is obtained for stiffer soil, compared to soft soil, as the 3D effects induced by the lateralboundaries lose significance. The earthquake characteristics (peak ground accelerations and frequency content) play important rolesin the differences among the three lateral boundaries. Furthermore, when the boundary extent along the y-direction is increased, thefoundation settlement that is controlled by the applied pressure and earthquake loading together, will be mostly affected by theseismic excitation. Overall, the conducted study highlights the significance of boundary conditions on the seismic responses of soilslopes and a shallow foundation on the top of it and can be helpful for engineers to choose an appropriate boundary in numericalanalysis.

A comparative study of landslide susceptibility maps using logistic regression, frequency ratio, decision tree, weights of evidence and artificial neural network

Liang-Jie Wang,Min Guo,Kazuhide Sawada,Jie Lin,Jinchi Zhang 한국지질과학협의회 2016 Geosciences Journal Vol.20 No.1

For the purpose of comparing susceptibility mapping methods in Mizunami City, Japan, the landslide inventory was partitioned into three groups as various training and test datasets to identify the most appropriate method for creating a landslide susceptibility map. A total of fifteen landslide susceptibility maps were produced using frequency ratio, logistic regression, decision tree, weights of evidence and artificial neural network models, and the results were assessed using existing test landside points and areas under the relative operative characteristic curve (AUC). The validation results indicated that the logistic regression model could provide the highest AUC value (0.865), and a relatively high percentage of landslide points fell in the high and very high landslide susceptibility classes in this study. Furthermore, the paper also suggested that the model performances would be increased if appropriate landslide points were used for the calculation.

Analysis of thermoelastic damping in bilayered rectangular microplate resonators with three-dimensional heat conduction

Linlin Wang,Xiaopeng Li,Wujiu Pan,Zemin Yang,Jinchi Xu 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.4

Thermoelastic damping (TED) is considered to be the main internal energy dissipation mechanism in microresonators, the study of which has become increasingly significant in the design of microresonators with high quality factor. In this paper, the bilayered cantilever, fixed-fixed and fully clamped rectangular microplate resonators are taken as the research object, and then three theoretical models of thermoelastic damping with three-dimensional heat conduction are built. The analysis on convergence items of the present threedimensional models with different combinations of materials are carried out, and the influence of material plating on TED in Si microplate resonators is also analyzed. The analysis on the effects of the geometry size and boundary conditions on thermoelastic damping of microresonators at the first-order natural frequency are both carried out. Moreover, in order to verify the validation and accuracy of the present three-dimensional (3-D) models, the previous one-dimensional (1-D) models and the FEM models built in this paper are used to compare with the present models. Finally, the validation and accuracy of the present three-dimensional models are confirmed.