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종업원의 매력도 및 관계특성이 고객의 동반이탈의도에 미치는 영향
오자건(Wu, Zi Jian),김도일(Kim, Doyle),박종희(Park, Jong Hee),김선희(Kim, Seon Hee) 한국유통학회 2015 流通硏究 Vol.20 No.1
본 연구는 종업원의 매력도(호감성, 전문성, 유사성), 대체 종업원의 매력도, 그리고 기존 종업원과의 관계특성(관계투자, 관계혜택, 관계단절비용)이 직접적으로 또는 관계의 질(만족, 신뢰, 애호도)을 통해 간접적으로 고객의 동반이탈의도에 미치는 영향을 검증하였다. 미용실을 이용하는 고객 228명으로부터 자료를 수집하여 분석한 결과, 종업원의 매력도가 관계의 질에는 영향을 미치나 고객의 동반이탈의도에는 직접적인 영향을 미치지 않는 것으로 나타났다. 즉, 종업원의 매력도는 관계의 질을 향상시키는 중요한 요인이지만 고객의 동반이탈의도에는 직접적으로 영향을 미치지 않고 관계의 질을 통하여 간접적으로 영향을 미치는 것으로 나타났다. 또한 대체종업원의 매력도는 고객의 동반이탈의도에 직접적으로 부정적인 영향을 미치는 것으로 나타났다. 관계특성은 종업원과의 관계의 질 및 고객의 동반이탈의도에 유의한 영향을 미치고, 고객애호도는 고객의 동반이탈의도에 유의한 영향을 미치는 것으로 나타났다.
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Establishment and Analysis of Erosion Depth Model for Impeller Material FV520B
Zi-Wu Liu,Jian-Feng Li,Xiu-Jie Jia,Guang-Cun Wang,Wen-Han Xu 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.3 No.1
The multifactorial erosion was conducted in this paper to test the compressor impeller material FV520B using high-speed gas-solid two phase flow erosion tester and surface morphology analysis method. Based on the particle motion and collision energy equation as well as regression analysis of multi-factor orthogonal experiment, a phenomenological erosion depth model which captures the effects of impact velocity, angle and particle size, has been developed. The model includes removal of material due to both deformation damage and micro-cutting. Results show that the peak of experiment depth and the maximum calculated depth all appeared at near 45o, rather than near 24o where the maximum erosion rate appeared. Comparing the calculated values and the results of each single factor experiment, the errors are within 15%. The predictions of the simplified version of the model were in good agreement with the results of single factor experiments. Also, the reliability of the assessment formula was verified to assess the impeller erosion life, which indicated that this calculation model could be used to estimate the erosion depth of compressor impeller material FV520B.
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Wu Yu-Xiao,Fei Zi-Jian,Feng De-Cheng,Song Meng-Yan 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.12
After a loss of coolant accident (LOCA) in the prestressed concrete containment vessels (PCCVs) of nuclear power plants, the coupling of temperature and pressure can significantly affect the mechanical properties of the PCCVs. However, there is no consensus on how this coupling affects the failure mechanism of PCCVs. In this paper, a simplified finite element modeling method is proposed to study the effect of temperature and pressure coupling on PCCVs. The experiment results of a 1:4 scale PCCV model tested at Sandia National Laboratory (SNL) are compared with the results obtained from the proposed modeling approach. Seven working conditions are set up by varying the internal and external temperatures to investigate the failure mechanism of the PCCV model under the coupling effect of temperature and pressure. The results of this paper demonstrate that the finite element model established by the simplified finite element method proposed in this paper is highly consistent with the experimental results. Furthermore, the stress-displacement curve of the PCCV during loading can be divided into four stages, each of which corresponds to the damage to the concrete, steel liner, steel rebar, and prestressing tendon. Finally, the failure mechanism of the PCCV is significantly affected by temperature.
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Yu Qing,Wu Li-bin,Zhang Fan,Wei Xiao-tong,Chen Pian-pian,Wang Shuai-ya,Cai Mei-yi,Shu Qi,Li Liao-yuan,Wu Zi-jian,Cai Rong-lin,Hu Ling 사단법인약침학회 2021 Journal of Acupuncture & Meridian Studies Vol.14 No.6
Background: Myocardial ischemia reperfusion injury (MIRI) is an important mechanism of post-myocardial infarction injury and a main cause of death in patients with ischemic heart disease. Electroacupuncture (EA) pretreatment is effective for the prevention and treatment of MIRI, but mechanisms mediating the effects of cardiovascular disease EA treatments remain unclear. Objectives: To determine whether the lateral hypothalamus (LHA) and the cerebellar fastigial nucleus (FN) are involved in the protective effects of EA stimulation on MIRI. Methods: EA pretreatment was performed for 7 days before the establishment of the MIRI model. ST-segment changes on electrocardiograms were recorded and the Curtis–Walker arrhythmia score was used to evaluate changes in reperfusion injury. Hematoxylin–eosin staining was applied to evaluate the pathological and morphological changes in myocardial tissue. c-fos expression in the LHA and FN was determined by immunofluorescence staining. Glutamic (Glu) and γ-Aminobutyric acid (GABA) levels were measured using a high-performance liquid chromatography-electrochemical method. Results: EA pretreatment reduced ST-segment elevation, arrhythmia scores, and morphological changes in MIRI myocardial cells in rats, and decreased the c-fos protein expression in LHA/FN nuclei. MIRI was associated with an imbalance between GABA and Glu levels, whereas EA pretreatment increased GABA levels and decreased Glu levels in the LHA/FN. Conclusion: FN and LHA are involved in the EA-mediated attenuation of MIRI. Pretreatment with EA plays a protective role in the myocardium by regulating Glu and GABA release in the LHA and FN.
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( Hong-xu Yang ),( Yue Shang ),( Quan Jin ),( Yan-ling Wu ),( Jian Liu ),( Chun-ying Qiao ),( Zi-ying Zhan ),( Huan Ye ),( Ji-xing Nan ),( Li-hua Lian ) 한국응용약물학회 2020 Biomolecules & Therapeutics(구 응용약물학회지) Vol.28 No.4
In current study, we aimed to investigate whether the gentiopicroside (GPS) derived from Gentiana manshurica Kitagawa could block the progression of alcoholic hepatic steatosis to fibrosis induced by chronic ethanol intake. C57BL/6 mice were fed an ethanol- containing Lieber-DeCarli diet for 4 weeks. LX-2 human hepatic stellate cells were treated with GPS 1 h prior to transforming growth factor-β (TGF-β) stimulation, and murine hepatocyte AML12 cells were pretreated by GPS 1 h prior to ethanol treatment. GPS inhibited the expression of type I collagen (collagen I), α-smooth muscle actin (α-SMA) and tissue inhibitor of metal protease 1 in ethanol-fed mouse livers with mild fibrosis. In addition, the imbalanced lipid metabolism induced by chronic ethanol-feeding was ameliorated by GPS pretreatment, characterized by the modulation of lipid accumulation. Consistently, GPS inhibited the expression of collagen I and α-SMA in LX-2 cells stimulated by TGF-β. Inhibition of lipid synthesis and promotion of oxidation by GPS were also confirmed in ethanol-treated AML12 cells. GPS could prevent hepatic steatosis advancing to the inception of a mild fibrosis caused by chronic alcohol exposure, suggesting GPS might be a promising therapy for targeting the early stage of alcoholic liver disease.
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