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심은선 ( Eun-seon Sim ),화수빈 ( Su-bin Hwa ),장익훈 ( Ik-hoon Jang ),나준희 ( Jun-hee Na ),김민회 ( Min-hoi Kim ) 한국센서학회 2021 센서학회지 Vol.30 No.6
We developed a highly accurate, yet inexpensive, refractive index (RI)-based soil moisture sensor. To detect the RI, a light guide was set with a light-emitting diode and photodiode. When the air fills the space between the soil particles, most of the incident light is reflected at the interface between the waveguide and the air because of the large RI difference. As the moisture of the soil increases, the macroscopic soil RI increases. This allows incident light to pass through the interface. The intensity of the light reaching the photodiode was simulated according to the change in the soil RI. Using the simulation results, we designed and manufactured a curved glass waveguide. We evaluated the performance of the RI-based soil sensor by comparing it with a commercially available, high-cost and high-performance time-domain reflectometer (TDR). Our sensor was 96% accurate, surpassing the costly TDR sensor.
기업 SNS 이용자(고객)의 지속적 사용의도에 관한 연구
심은선(Eunsun Shim),이정훈(JungHoon Lee),정법근(BeobGeun Jeong) 한국IT서비스학회 2013 한국IT서비스학회지 Vol.12 No.4
As the usage of SNS has grown dramatically over the last years. it has been used in various sectors not just a tool for communication. In particular, corporate companies actively use Facebook as a tool for corporate marketing. Corporate companies communicate with their customers by providing service or events information. In this study, empirical analysis was carried out on corporate companies that are using Facebook as a marketing tool. thus finding out the influencing factors in continued usage of Facebook Fan Page users. In addition. analysis of the factors will be investigated according to continued usage of the users. where the user's intention will differ depending on how corparate companies operate and deal with the Facebook Fan Page. Factors affecting the user's satisfaction, perceived usefulness, and perceived playfulness were deducted through the analysis of the existing literature study on corparate company's continued intention on the usage of Facebook Fan Page. Accordingly, factor affecting this such as relationship, speed. content diversity, which are the media characteristics of the Facebook were deducted and finally hypathesized. In addition. the type of corparate company's Facebook Fan Page was divided into event type, communication type, information service type. And hence investigated the factors that differed from the continued usage depending on the type. Results analysis shows that perceived usefulness affected only relationship, speed, content diversity. Furthermore, analysis shows that corporate company's Fan Page of communication and event types are the factors that affect the usage intention which meant it only affected the perceived enjoyment. On the basis of this study, we are able to present an implication of value where corporate company use it as a marketing tool, through factors from continued usage of coroparate company's Facebook Fan Page users.
이민숙(Lee, Min Sook),심환희(Sim, Hwan Hui),배주영(Bae, Ju Young),나은선(Na, Eun Sun),태영숙(Tae, Young Sook) 고신대학교 전인간호과학연구소 2015 전인간호과학학술지 Vol.7 No.-
Purpose: The purpose of this study was to explore and describe health promotion of clinical nurse and how health promoting behavior affects of them. Methods: The Experiences were explored through in-depth individual interviews with 6 clinical nurses. The analysis of the data was made by phenomenological analytic method suggest by Colaizzi. Result: The results showed that health promotion experience in clinical nurses consisted eight themes and four themesclusters: “Indifference of health management practice”, “ Working environment is Obstacle”, Finding of own hygiene“, ”Interest in the health“. Conclusion: It is necessary to develop an effective health program for clinical nurses how to practice health promotion behaviors and a desirable lifestyle.
Kubelka-Munk 모델을 이용한 피부 분광반사율 연구
조아라 ( A Ra Cho ),김수지 ( Su Ji Kim ),이준배 ( Jun Bae Lee ),심건영 ( Geon Young Sim ),백민 ( Min Back ),조은슬 ( Eun Seul Cho ),장지희 ( Ji Hui Jang ),장은선 ( Eunseon Jang ),김연준 ( Youn Joon Kim ),유권종 ( Kweon Jong Yoo ) 대한화장품학회 2016 대한화장품학회지 Vol.42 No.1
빛은 피부에서 개개인마다 상이한 반사, 흡수 및 산란 등의 광학적 거동을 보여준다. 특히, 피부에서 빛의 반사는 분광반사율이라는 물리량 측정을 통해 개인의 피부 밝기지표로 널리 활용되어 왔다. 따라서 피부에서 빛의 반사 거동 연구는 개인 맞춤형 화장품, 특히 메이크업 제품 개발에 있어 좀 더 효율적인 처방 개선에 기여하거나 새로운 평가법에 활용될 수 있다. 본 연구에서는 Kubelka-Munk 모델을 이용하여 개인의 피부 특성에 따른 빛의 분광반사율 거동에 대해 다각적인 분석을 수행하였다. 또한, 상기 모델과 기존에 알려진 문헌 정보를 이용하여 개인의 피부 분광반사율에 영향을 줄 수 있는 피부 두께 및 헤모글로빈 등의 다양한 파라미터들에 대한 기여도 분석을 수행하였다. 이를 통해, 일반적인 여성의 피부에서의 분광반사율 이론치를 계산하였고, 분광반사율 실측을 통해 이론치와 실측치 간의 유사성을 확인하였다. Kubelka-Munk 모델을 이용한 피부 분광반사율 연구는 향후 새로운 개인 맞춤형 메이크업 화장품 개발에 유용하게 이용될 수 있을 것으로 사료된다. Light shows various optical behaviors such as reflection, absorption, and scattering on skin for individuals. In particular, reflection of light from the skin has been widely used as the brightness index of the skin of individuals through the measurement of the physical quantity of spectral reflectance. Therefore, the study of light behavior on skin would be useful for the preparation of new evaluation method in the development stage of make-up products. In this study, multi-dimensional analysis for spectral reflectance behavior of light on individual skin was performed using Kubelka-Munk model. Also, we analyzed the contribution of skin parameters such as skin thickness and hemoglobin, which could affect the spectral reflectance, using above model and literature information. Base on this, we calculated the theoretical reflectance of normal women for visual light, which showed good agreement with the measured reflectance. Our study of light propagation in skin based on Kubelka-Munk model provides useful insight for the development of personalized cosmetic in the near future.