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Effects of Transesterification Catalysts on the Compatibilization of TLCP/PC Blends
강하은,장윤주,정영규 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
A combination of excellent mechanical and thermal properties with good flow and favorable price is very required for polymeric materials. Thermotropic liquid crystal polyester/polycarbonate (TLCP/PC) blends are well suited for the production of thin-walled electric/electronic parts with outstanding mechanical strength, heat resistance, excellent shape stability, and soldering resistance. However, melt-processible TLCP/PC blends are immiscible in the molecular level. In this study, we have investigated the influences of organometallic transesterification catalysts on the compatibilization of TLCP/PC blends. For the purpose, TLCP/PC blends different mixing ratios are melt-compounded in the presence of transesterification catalysts. The morphological features of the blends are characterized using SEM, FT-IR, and XRD. The crystallization kinetics, thermal transition, thermal stability, rheological and mechanical properties of the blends are investigated using DSC, TGA, rheometer, and DMA.
강하은,정서미곤,김지연 대한피부과학회 2023 대한피부과학회지 Vol.61 No.8
Marjolin’s ulcer is a malignant skin tumor that arises at the site of scars, chronic ulcerations, inflammations, and fistulas after a long latent period. These tumors are mostly squamous cell carcinomas; however, other types of malignancies, such as basal cell carcinoma, malignant melanoma, and sarcoma rarely occur. Marjolin’s ulcer have aggressive characteristics, and local recurrence and lymph node metastasis rates are higher than those of cutaneous primary tumors. Herein, we report an unusual case of squamous cell carcinoma at the site of an arteriovenous fistula ulcer treated with repeated radical operation and skin graft.
대학생이 지각한 부모양육태도가 직업가치에 미치는 영향: 자아정체감, 진로결정자기효능감의 매개효과
강하은,홍혜영 한국청소년학회 2024 청소년학연구 Vol.31 No.2
The purpose of this study is to examine the mediating effect of self-identity and career decision-making self-efficacy in the relationship between parental child-rearing attitudes perceived by university students and occupational value (internal and external). The results of the study are as follows. First, parental child-rearing attitudes, internal occupational value, self-identity, and career decision-making self-efficacy had a significant positive correlation with each other and had a significant negative correlation with external occupational value. Second, as a result of verifying the mediating effect of self-identity in the relationship between parental child-rearing attitudes and internal occupational value, it was found that self-identity had a significant mediating effect in the relationship between parental child-rearing attitudes and external occupational value. Third, as a result of verifying the mediating effect of career decision-making self-efficacy in the relationship between parental child-rearing attitudes and internal and external occupational value, it was found that it was not significant. Fourth, it was confirmed that self-identity and career decision-making self-efficacy had a significant sequential double-mediating effect on the relationship between parental child-rearing attitudes and internal and external occupational value.
Bier’s Spots 환자 18예에 대한 분석: 후향적 단일기관 연구
강하은,김지연 대한피부과학회 2023 대한피부과학회지 Vol.61 No.8
Background: Bier’s spots represent a distinct pattern of speckled vascular mottling composed of small, irregular anemic macules. This phenomenon is common and easily reproducible by placing an extremity in a dependent position when mild venous stasis is created. Objective: This study aimed to investigate the clinical manifestations of multiple anemic macules, Bier’s spots, and analyze its association with other underlying conditions in hospital outpatients. Methods: Between 2015∼2020, we reviewed clinical data of 18 patients diagnosed with Bier’s spots at our hospital. Analysis was performed to assess patient’s demographics, presentation, and treatment. Results: A total of 18 patients were included, and 10 (55.6%) were males. Lesions on both sides of the extremities were more common in 11 patients (61.1%), with four (22.2%) and two (11.1%) only on the upper and lower sides, respectively. Symptoms included itching in six patients (33.3%), numbness in two (11.1%), tenderness in one (5.6%), and asymptomatic in 11 (61.1%). The symptoms often accompanied hypertension, atopic dermatitis, and dyslipidemia. Histopathologic findings showed perivascular inflammation in six biopsy specimens, lymphocytic infiltration in four (66.7%), and papillary dermal vascular dilatation in three (50.0%). Calcium channel blockers and antihistamines were used for treatment in 13 patients (72.2%). Conclusion: The result shows clinical manifestations of Bier’s spots and a possibility of association with various underlying diseases. Optimum treatment for Bier’s spots has not been defined, and because most cases are asymptomatic, no treatment is required. Therefore, this study will be a valuable data of Bier’s spots for dermatologists.
Service Profit Chain 모델을 이용한 K-pop 산업의 가치창출 과정에 관한 연구
강하은,김승철 한국엔터테인먼트산업학회 2023 한국엔터테인먼트산업학회논문지 Vol.17 No.1
In the recent years, the global success of K-Pop music—BTS in particular—is drawing a lot of attention in the global music industry. The year 2020 was another monumental year for K-Pop as BTS, the South Korean boy band, achieved a remarkable success by winning a few prominent prizes such as "Top Social Artist Award" and "Top Duo/Group Award" in the Billboard Music Awards. In the past, the global music industry was usually dominated by Western musicians, and the continued successes of the K-Pop groups tend to raise some intriguing questions. This study is an empirical research showing the value creation process of K-Pop groups by applying the service profit chain and satisfaction mirror theory. Summarizing the results, teamwork and service training of internal service quality had a significant effect on the satisfaction of group members, which in turn had a positive effect on the service value delivered to the fans and ultimately led to loyalty through the satisfaction of the fans. Fans are customers of the K-Pop industry, and their loyalty is an important factor for improving the performance of the entertainment company in the service profit chain theory. This study is meaningful in that actual data on the value creation process of the K-pop group were collected and empirically analyzed based on the service profit chain theory while there is few empirical research on the K-pop industry. It also has the meaning of providing strategic and operational guidelines for entertainment companies in the K-Pop industry.