Concentration of Aquaporin Incorporated Liposomes and Water Purification Using Preconcentration Device

류현일,장희수,최상백,이인수,박가람,김선민,전태준 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.0

Study for the gramicidin a activities in the presence of ionic liquids (ILs) using model cell membrane and simulation

류현일,이환규,최상백,김영록,김선민,전태준 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

As the toxicity of ILs has not been proved in aquatic environment, it cannot assume that ILs are completely safe. Hence, we investigate mechanism of ILs between membrane and membrane protein using model cell membrane in this work. The ion permeability of gA varies depending on the state of the bilayer, we confirmed it using two methods; fluorescence assay utilizing using stop-flow spectrometer and measurement of ion currents across lipid bilayers using a patch clamp instrument. Moreover, we revealed that alkyl chain length of ILs and ion strength of buffer play an important role in the permeability and confirmed how electrostatic effect changed depending on ion strength of buffer using MD simulation.

Description of Molecular Interactions between Lipid Bilayers and Ionic Liquids Using model Protein

류현일,( Iwata Seigo ),정승환,( Maruta Shinsaku ),김선민,전태준 한국공업화학회 2013 한국공업화학회 연구논문 초록집 Vol.2013 No.-

Nanopore - and Aptamer-based Stochastic Sensor for Bacterial Spore Detection

류현일,박중진,임민철,심지욱,김영록,전태준,김선민 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.4

특수교육지원센터 웹 사이트 접근성 및 준수율 분석

류현,강종구 한국지적장애교육학회 2019 지적장애연구 Vol.21 No.1

The purpose of this study was to investigate how special education support center websites guarantee the web accessibility and compliance rate per items for students with disabilities. For the purpose of this study, we investigated the level of accessibility per inspection items of 34 special education support center websites and the compliance rate of investigation items through 24 inspection items of Korean web content accessibility guidelines 2.1. The results of this study were as follows: First, the level of accessibility of special education support center websites was shown less than web accessibility quality certification criteria(95%) for quality certification for web accessibility. Second, the exploration on the compliance rate per investigation items of special education support center websites showed all the four areas(ease of perception, ease of operation, ease of understanding, and robustness) were lower than certification criteria of quality. This study shows that students with disabilities can experience difficulties in the use of web because the accessibility of special education support center websites was not guaranteed. Therefore, web accessibility needs to be urgently improved. In addition, this study shows the necessity of various improvements related to specail education support center website such as the improvement of awareness on website development and operating personnels, the acquisition of techniques related to web accessibility, and the improvement of laws or systems related to web accessibility. 본 연구는 특수교육지원센터의 웹 사이트들이 장애학생들에 대한 웹 사이트의 접근성 및 항목별 준수율이 어느 정도 지키고 있는지를 알아보기 위한 연구이다. 이를 위해 한국형 웹 콘텐츠 접근성 지침 2.1의 24개 검사 항목을 통해 34개 특수교육지원센터의 웹 사이트 접근성 수준과 검사 항목별 준수율을 알아보았다. 본 연구의 결과는 다음과 같다. 첫째, 특수교육지원센터 웹 사이트의 접근성 수준은 웹 접근성을 위한 품질인증 심사 기준(95%)보다 낮게 나타났다. 둘째, 특수교육지원센터 웹 사이트의 검사 항목별 준수율은 4개 영역(인식의 용이성, 운용의 용이성, 이해의 용이성, 견고성) 모두에서 품질인증 심사 기준보다 낮게 나타났다. 본 연구는 특수교육지원센터 웹 사이트의 접근성이 보장되지 않아 웹 사이트에 있는 정보를 장애학생이 웹을 활용하는 데 어려움을 경험할 수 있음을 보여주고 있다. 따라서 웹 접근성은 시급히 개선될 필요가 있다. 이와 함께 본 연구는 특수교육지원센터 웹 사이트와 관련하여 웹 사이트 개발 및 운영 인력의 인식 개선, 웹 접근성 관련 기술 습득, 웹 접근성 관련 법령이나 제도의 개선 등이 필요함을 보여주고 있다.

마음의 돌

류현 중앙대학교 예술대학 문예창작학과 1991 창작문화 Vol.8 No.-

접지판과 방사 패치 사이의 간격 변화에 따른 QMSA의 특성 연구

류현,박성교,박종백,Ryu, Hyun,Park, Sung-Kyo,Park, Chong-Baek 한국음향학회 1999 韓國音響學會誌 Vol.18 No.4

본 논문에서는 CHUKOH사의 CGP-500 PTFE 기판상에(유전율 2.6, 두께 1.6mm(±0.08)) 접지판의 폭과 방사 패치의 폭이 동일한 850MHz 대의 QMSA(Quarter-Wavelength Microstrip Antenna)를 설계·제작하였다. 실험에 의하여 가장 양호한 급전점을 선정하여 프로브 급전한 다음, 방사 패치와 그라운드 판과의 간격 L₃을 단계적으로 5mm씩 잘라가면서 QMSA의 공진 주파수와 반사 손실을 측정하였다. 그 결과, 간격 L₃이 좁아질수록, 특히 10mm 이하에서는 예상과 달리 공진 주파수는 증가하고 반사 손실은 감소하는 것을 알 수 있었다. In this paper, we designed and fabricated QMSA(Quarter-Wavelength Microstrip Antenna) for 850MHz band on the CGP-500 PTFE substrate(by CHUKOH company) with ε/sub r/=2.6, H=1.6mm(±0.08), where width of the radiation patch is .identical with that of the ground plane. A well matched feed point was obtained by experiments and this QMSA was fed by using prove feed method. The resonant frequencies and the return losses were mcasured by cutting the gap L₃ between the radiation patch and the ground plane, with a 5mm cutting length, step by step. As a result, we found that the measured return losses were decreased and the resonant frequencies were increased when the gap L₃ was shorter, especially under 10mm, unlike we had expected.

커피전문점 직원의 언어적 · 비언어적 커뮤니케이션이 고객감정과 행동의도에 미치는 영향

류현아(Ryu, Hyun A),박기용(Park, KI Yong) 한국호텔외식관광경영학회 2015 한국호텔외식경영학회 학술발표논문집 Vol.- No.-

The purpose of this study is to reveal the influence of employee’communications on customer"s emotional response and behavioral Intention in coffee shop. through research, customer-centric service environment by presenting the elements as part of an effective marketing of the coffee shop want to be helpful. These hypotheses were conducted by using the statistics programs SPSS21.0 with 302 samples obtained from the empirical research. The results can be summarized as follows: First, an employee’communication is sensitive to impact customer sentiment. Second, customers have experienced emotions affect in the future. Implications of the study, as communication with the customers and employee aware of the sensitive topics with a focus on training manual requires the utilization of a continuous staff training.

커피전문점 수익 관리

류현아,공경배,김광지 한국외식경영학회 2017 외식경영연구 Vol.20 No.4

The purpose of this study is to suggest the coffee revenue management model. To do this, we reviewed strategies to increase the profit of coffee shop(Café) through previous studies and conducted observation and analysis. To summarize the results of the study, RevPASH and profitability can be improved through the average check (new menu development through the menu engineering), seat turnover (through the price differentiation), and seat occupancy rate (through the downsizing and table mix) as the revenue management of the coffee shop. The implications of the study are discussed below. The theoretical implications are the expansion of the research scope of the revenue management, the utilization of secondary data, and the presentation of the revenue management model of coffee shop. The practical implications are the use of menu engineering and table mix and downsizing of the coffee shop. However, this study has limitations by utilizing limited data. 본 연구는 커피전문점에 적합한 수익 관리 모델을 제시하는 것이 목적이다. 이를 위해 선행연구를 통한 커피전문점의 수익을 증대할 수 있는 전략을 고찰하고 이를 기반으로 관찰과 분석을 실시하였다. 연구결과를 요약하면, 커피전문점의 수익 관리전략으로 평균 객 단가(메뉴엔지니어링을 통한 신 메뉴 개발), 좌석회전율(가격차별화), 그리고 좌석점유율(다운사이징과 테이블 믹스)을 통해 RevPASH와 수익성을 높일 수 있는 것으로 나타났다. 연구의 시사점을 제시하면 다음과 같다. 이론적 시사점으로 수익 관리의 연구범위 확장, 2차 자료 활용, 그리고 커피전문점 수익 관리 모형을 제시한 것이다. 실무적 시사점으로 메뉴엔지니어링 활용, 테이블 믹스 활용, 그리고 매장의 다운사이징을 제안한 것이다. 하지만 제한된 자료를 활용함으로써 일반화하기에 한계가 있다.

영재학생의 다중지능과 그 학부모가 인식하는 자녀에 대한 다중지능의 비교

류현아,Ryu, Hyunah 영남수학회 2021 East Asian mathematical journal Vol.37 No.4

In this study, we compare the multiple intelligence of gifted students with the multiple intelligence of their children recognized by their parents. The subjects of the study are 118 students and their parents at the gifted education center affiliated with A University. First of all, there is a difference between the multiple intelligence of gifted students and the multiple intelligence recognized by their parents. Parents are highly regarded their children in all multiple intelligence components. Second, there are differences in multiple intelligence of gifted students' gender. The difference in multiple intelligence of children recognized by parents depending on the gender of the student was similar to the student's results. Third, there are not much difference in multiple intelligence between elementary and middle school students. However, there is a big difference between students and parents in the elementary school group compared to the middle school students. Therefore, since multi-intelligence can be developed by individual experience and environment throughout one's life, an educational environment that reflects objective evaluation and student needs rather than parental subjective judgment should be created.