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Infrared Thermography Quantitative Diagnosis in Vibration Mode of Rotational Mechanics
Seo, Jin-Ju,Choi, Nam-Ryoung,Kim, Won-Tae,Hong, Dong-Pyo The Korean Society for Nondestructive Testing 2012 한국비파괴검사학회지 Vol.32 No.3
In the industrial field, real-time monitoring system like a fault early detection is very important. For this, the infrared thermography technique as a new diagnosis method is proposed. This study is focused on the damage detection and temperature characteristic analysis of ball bearing using the non-destructive infrared thermography method. In this paper, thermal image and temperature data were measured by a Cedip Silver 450 M infrared camera. Based on the results, the temperature characteristics under the conditions of normal, loss lubrication, damage, dynamic loading, and damage under loading were analyzed. It was confirmed that the infrared technique is very useful for the detection of the bearing damage.
Ju, Seo Hee,Kim, Dong-Won American Scientific Publishers 2013 Journal of Nanoscience and Nanotechnology Vol.13 No.5
<P>Spinel LiMn1.5Ni0.5O4 materials with different morphologies were prepared by solid-state reaction method using nano-sized Mn-Ni-O precursor powders. The effect of annealing temperature on the physical properties and electrochemical performance of the LiMn1.5Ni0.5O4 cathode materials was investigated. As the annealing temperature was increased from 700 to 1000 degrees C, the particle size distinctly increased. The nano-sized LiMn1.5Ni0.5O4 powder obtained at 800 degrees C exhibited a high initial discharge capacity of 130 mA h g(-1) and good rate capability. The LiMn1.5Ni0.5O4 material annealed at higher temperature (1000 degrees C) exhibited good cycling stability.</P>
Influencing Factors of Nursing Student’s Attribution Disposition and Self-Compassion on Trait Anger
Won Hee Jun,Ji Yeong Seo,Myoung Ju Jo 위기관리 이론과 실천 2019 Crisisonomy Vol.15 No.9
본 연구는 간호대학생을 대상으로 귀인성향, 자기자비가 특성분노에 미치는 영향을 확인하기 위해 시도되었다. 대상자는 B와 D광역시에 소재하는 2개의 4년제 간호대학에 재학 중인 간호대학생을 대상으로 하였다. 자료분석은 SPSS/WIN 23.0 프로그램을 이용하였으며, 빈도와 백분율, 평균과 표준 편차, t-test, ANOVA, Scheffé test, Pearson’s correlation coefficient, stepwise multiple regression을 실시하 였다. 대상자의 특성분노는 귀인성향 중 타인지향(r=.30 p<.001), 우연지향(r=.27, p=.001)과 정적 상관 을 보였으며, 자기자비(r=-.33, p<.001)와는 부적 상관이 있었다. 회귀분석 모형의 적합성과 관련하여 F 통계량은 11.66(p<.001)으로 나타나 통계적으로 유의하였으며, 설명력 R2 는 15.1%로 나타났다. 자 기자비(β=-0.28, p=.002), 외적 지향(β=0.19, p=.033) 순이었다. 본 연구결과를 통해 향후 분노중재 프로그램 개발에 기여할 것으로 사료된다. This study is a descriptive study that aims to identify the effects of attribution style and self-compassion on trait anger among nursing students. The data were collected from 146 nursing students attending two nursing colleges located in Metropolitan Cities B and D in September 2017, and analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficient and stepwise multiple regression. This study found that self-compassion had a negative effect on the subjects’ trait anger (β=-0.28, p=.002) while attribution disposition-powerful others had a significantly positive effect (β=0.19, p <.033). The F-statistic showed the model is good for the analysis (F=11.66, p <.001) although the explanatory power is low (R2 =0.151). The findings in this study could be used as basic references to develop a program that would help nursing students, who will become future nurses, reduce and control their level of anger efficiently.
Impact of Nano-Pore Structure in Harden Non-Sintering Cement.
Seo, Seong-Gyu,Kim, Sang-Chai,Kim, Eun-Sik,Mun, Kyoung-Ju,Park, Won-Chun,Eum, Hyun-Mi,Yoon, Hyung-Sun American Scientific Publishers 2015 Journal of nanoscience and nanotechnology Vol.15 No.7
<P>This study investigates the nano pore structure of non-sintering cement (NSC) matrix. The result of pore structure properties showed no considerable difference in the total pore volume, but presented a large distinction in distribution of pore diameter by cement mixing ratio. The pore-diameter of NSC paste shows that occupation ratio of pore diameter below 10 nm was larger and was smaller than ordinary Portland cement (OPC) and blast-furnace slag cement (BSC) at pore diameter of over 10 nm. The reasons are due to the hydrate such as C-S-H gel and ettringite which formed dense nano pore structure of NSC matrix.</P>