http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Magnetic property of Sm-Co nanoparticles prepared by solution phase metal salt reduction.
Cha, Hyun Gil,Kim, Chang Woo,Ji, Eun Sun,Kang, Dong In,Kang, Young Soo American Scientific Publishers 2009 Journal of Nanoscience and Nanotechnology Vol.9 No.12
<P>Sm-Co magnetic nanoparticles were successfully synthesized at high temperature above 680 degrees C in solution phase. The chemical composition was determined by EDX and it was found that the composition of as-synthesized Sm-Co magnetic nanoparticles showed less Sm content compared with the composition of starting materials. From TEM and FE-SEM measurements, the morphology of as-synthesized and heat-treated Sm-Co a magnetic nanoparticle was confirmed as hexagon and apatite crystal structure. Curie temperature was observed at around 680 degrees C correspond to SmCo5 phase. The magnetic property was measured by VSM and shows the ferromagnetic characteristics.</P>
Effects of Boronic Acid on the Fluoride-selective Chemosignaling Behavior of a Merocyanine Dye
Cha, Sun-Young,Jeon, Hye-Lim,Choi, Myung-Gil,Choe, Jong-In,Chang, Suk-Kyu Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
The effects of boronic acid on the fluoride-selective chemosignaling behavior of a merocyanine dye were investigated. In the presence of phenylboronic acid (PBA), N-methylquinolinium-based merocyanine dye displayed fluoride-selective chromogenic signaling behavior over other commonly coexisting anions in the micromolar concentration range. Signaling is produced by a fluoride-induced displacement of the dye from its complex with PBA, resulting in a significant chromogenic signal for the fluoride ion. This signaling was successfully analyzed using a ratiometric analysis of the UV-vis absorption in response to changes in fluoride ion concentration. A PBA substituted with an electron withdrawing group was found to exhibit a more pronounced signal. Polymer-bound PBA also exhibited useful fluoride-selective signaling behavior.
Hong, Sun Mi,Park, Chang Wook,Cha, Hyung Jin,Kwon, Jung Hee,Yun, Young Sung,Lee, Nam Gyu,Kim, Dae-Ghon,Nam, Hong Gil,Choi, Kwan Yong Taylor Francis ; Rapid Science Publishers 2013 Clinical & experimental metastasis Vol.30 No.2
<P>Cholangiocarcinoma (CC) is a malignant epithelium neoplasm that originates from the bile epithelium and for which there are few therapeutic strategies. The mTOR pathway involved in many cellular processes was reported to be up-regulated in various cancers. We investigated the activation of the AKT/mTOR pathway in CC cell lines with different degrees of dedifferentiation and found that rapamycin could suppress the motility and the peritoneal dissemination of sarcomatoid SCK cells. Inhibition of the mTOR pathway with rapamycin decreased significantly the number of tumor nodules and prolonged the survival rates of nude mice inoculated with sarcomatoid CC cells. Prolonged treatments with rapamycin were found to disrupt the mTORC2 assembly and to reduce the phosphorylation of STAT3 at Ser 727. Rapamycin decreased both mRNA and protein levels of MMP2 and Twist1, which are regulated by STAT3 and associated with cancer metastasis. The overexpression of STAT3 S727A lacking the phosphorylation site resulted in significantly less sensitivity to rapamycin than the overexpression of STAT3 WT. Taken together, our results suggest that rapamycin could suppress the motility of sarcomatoid CC by down-regulating p-STAT3 (S727) through the impairment of mTORC2 assembly.</P>
중년기 부부의 스트레스와 결혼만족도가 우울에 미치는 자기효과와 상대방 효과
차근영 ( Cha Geunyeong ),김석선 ( Kim Suk-sun ),길민지 ( Gil Minji ) 한국보건사회연구원 2017 保健社會硏究 Vol.37 No.2
본 연구의 목적은 부부의 스트레스, 결혼만족도, 우울의 상호의존성을 검증하고, 이 후 모형 분석을 통해 스트레스와 결혼만족도가 우울에 미치는 자기효과와 상대방 효과의 영향을 분석하는 것이다. 연구 대상은 40-60세까지의 중년 부부로, 본 연구는 부부관계의 상호의존성을 고려하여 중년부부 207쌍의 커플자료를 Actor-Partner Interdependence Model(APIM) 분석방법을 통하여 경로 모형으로 분석하였다. 연구 결과, 스트레스, 결혼만족도, 우울에서 모두 유사성이 있는 것으로 나타나 APIM 모형 분석이 적합한 것으로 나타났다. 모형 1에서는 중년 부부의 스트레스가 높을 때 자신의 우울이 증가하는 자기효과가 있는 것으로 나타났으며, 상대방 효과에서는 부인의 스트레스만이 남편의 우울을 증가시키고, 남편의 스트레스는 부인의 우울에 영향을 미치지 않는 것으로 나타났다. 모형 2에서는 결혼만족도가 높을 때 남편과 부인 모두 자신의 우울을 감소시키는 자기효과가 있는 것으로 나타났다. 상대방 효과로는 부인의 결혼만족도만이 남편의 우울을 감소시키는 효과가 있고, 남편의 결혼만족도는 부인의 우울에 영향을 미치지 않았다. 본 연구 결과를 바탕으로 부부를 대상으로 스트레스 관리 및 결혼만족도를 높일 수 있는 중재를 개발하는 것이 중년기 부부의 우울증 예방을 위해 필요하다고 제언한다. The purpose of this study was to examine the effect of middle-aged couples` stress and marital satisfaction on depression individually and interactively between wife and husband by using the Actor-Partner Interdependence Model (APIM). Data from 207 middle aged couples have been analysed with path analysis. The results of this study were as follows. There was a significant degree of similarities between husband and wife on stress, marital satisfaction and depression. Stress had significant actor effect on the depression of husband and wife alike, revealing the influence of positive stress on depression. In contrast, there was difference in the influence of the partner effect between husband and wife. That is, the stress of husband had no partner effect on the wife`s depression, whereas, the stress of wife had negative partner effect on the husband`s depression. Martial satisfaction had also actor effect presenting that when martial satisfaction was high, individual depression of husband and wife was low. Likewise the stress, marital satisfaction had no partner effect on the wives` depression, indicating that wives` marital satisfaction had negatively influenced the depression of their partner. However, the husband`s marital satisfaction had no influence on their partners` depression. These findings emphasized the importance of considering the reciprocal influences between wife and husband when planning interventions and programs in regards to improving the depression of middle aged couples.
카지노 종사원의 경력정체 지각과 고객지향성의 관계에서 학습된 무기력의 매개효과
신선화 ( Shin Sun-hwa ),차길수 ( Cha Gil-soo ) 한국관광산업학회 2020 Tourism Research Vol.45 No.1
본 연구에서는 문헌 연구와 실증 분석을 토대로 경력 정체를 지각한 종사원이 학습된 무기력과 고객 지향성의 관계에서 매개효과를 분석하였다. 본 연구를 토대로 기업의 경력 정체 현상 연구에 대해 기여하여 조직 구성원인 개인의 효율적인 경력 관리 방안을 제시하고, 조직 관리자 및 HRD 담당자에게 실무적으로 필요한 시사점을 제언하고자 한다. 실증연구를 위하여 국내 카지노 기업 중 3개사(G, K, P) 종사원을 대상으로 2018년 12월 1일부터 12월 31일까지 조사를 실시하였다. 설문은 총 500부를 배부하였으며, 430부(86%)를 회수 이중 불성실한 설문 등을 제외한 400부(80%)를 최종 분석에 사용하였다. 실증분석 결과는 다음과 같다. 첫째, 가설1의 카지노 종사원의 경력정체가 학습된 무기력에 미치는 영향을 검증한 결과 경력정체는 학습된 무기력에 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 카지노 종사원의 학습된 무기력은 고객지향성에 부(-)의 영향을 미치고 있으며 이는 정신 건강의 문제혹은 병리적인 증상으로 발전될 가능성이 높다는 점에서 기인하였다. 마지막으로 카지노 종사원의 경력정체와 고객지향성의 영향관계에서 학습된 무기력이 매개역할을 하는지에 대해 검증한 결과 학습된 무기력은 경력정체와 고객지향성의 관계에서 부분 매개하는 것으로 나타났다. 주요 시사점으로 경력정체 지각을 낮추기 위해서 카지노 조직에서는 공정한 평가 등 체계적인 평가의 기준마련과 직책, 직급 부여 및 보상 시스템이 필요함을 제시하였다. This study examined the mediating role of learned helplessness of casino employees in the relationship between the perceived career plateau and customer orientation. This study contributed to address a career plateau phenomenon in enterprise so that it suggested effective individual career management and practical implications for HR Department. For this study, 500 casino employees from 3 different companies participated in the survey which carried out from 1st of December 2018 to 31st of December 2018. 400 valid respondents of those were used for the final analyze. The final findings are followings. Firstly, after test hypothesis, the result showed that perceived career plateau of casino employees affected positively to learned helplessness of casino employees. Secondly, the result found out that perceived career plateau of casino employees has negative relationship to customer orientation, this result came from the point of employees who feel learned helplessness are more likely to have mental problems or pathological symptom. Lastly, the hypothesis examined the mediating role of learned helplessness of casino employees. It was found that learned helplessness of casino employees was found to mediate partially the influence of perceived career plateau on customer orientation. This results has a significance as it suggested implications to create and apply standards for fair evaluation and need of appropriate job position, authority and compensation or reward system to management.
Copper plating on the polyimide film by electroless plating techniques for EMI shielding.
Ji, Eun Sun,Cha, Hyun Gil,Kim, Chang Woo,Kang, Dong In,Kang, Young Soo American Scientific Publishers 2009 Journal of Nanoscience and Nanotechnology Vol.9 No.12
<P>In this work, the metal plated film was prepared by electroless plating techniques. The film was prepared for the fabrication of EMI shielding. Polyimide film was treated by base solution for etching and then activated by silver. The modified polyimide film was immersed into the electroless copper plating solution which has different molar ratios of nickel in the solution. The thickness and surface morphology of copper layer on the polyimide films were characterized with scanning electron microscopy (SEM). Furthermore, EMI shielding ability of the film was calculated by measuring reflectivity of EM wave on the film surface using the equation of Schelkunoff theory.</P>