Extraction of Phenolic Compounds from grape Seed Using Supercritical $CO_2$ and Ethanol as a Co-solvent

이원영,장규섭,최용희,Lee, Won-Young,Chang, Kyu-Seob,Choi, Yong-Hee The Korean Society of Food Preservation 2000 Food Science and Preservation Vol.7 No.2

A supercritical fluid extraction was performed for the extraction of phenolics from grape seeds which up to now have been discarded. The optimum condition for extraction process was predicted through response surface methodology using central composit experimental design. The extraction amount of grape seed phenolics was increased by increasing extraction temperature, pressure, and concentration of co-solvent (ethanol). The optimum extraction conditions were 84.83$^{\circ}$C, 51.50MPa and 1.27% ethanol. The yield of phenolics using SFE was higher with 3 folds than ethanol and 4 folds than hexane but less than 80% methanol. In the respects of food poisoning, the approved solvents were restricted to ethanol and hexane. So, SFE for extraction of phenolics could be powerful alternative method for solvent extraction.

국민임대아파트단지의 거주실태 및 커뮤니티의식 비교 연구

이원영,강순주,Lee, Won-Young,Kang, Soon-Joo 한국주거학회 2008 한국주거학회 논문집 Vol.19 No.2

The purpose of the study is to provide basic data to be useful for living environment of National Rental Housing, through comparative analysis of residential conditions, community consciousness of residents, characteristics of 3 complexes, whose residents have lived more than 3 years, different in area and size. Deungchon 11 Complex in Seoul, Eui-wang Naeson Complex, and Incheon Samsan 4 Complex are chosen for the investigation and the survey and 242 copies of the questionnaire are analyzed for the final result. Analyzing the contents of the survey results are as follows those deriving conclusions and suggestions. 1) Housing and construction standards are required to reconsider for enhancing of community consciousness and housing satisfaction of residents of National Rental Housing. 2) Spending on residential move, and minimize the unnecessary expense of low-income housing need to do to promote stability. 3) Facilities and equipments for residents are needed considering barrier-free design which introduces universal design. 4) Welfare facilities such as culture space and after-school classroom for teenagers are needed. 5) By using the broadcast media actively pro-mote, various layers are encouraged moving into National Rental Housing, through the concept of housing opportunities for change. 6) In short-term, community space are need remodeling and various activity programs are developed to induce activation of community facilities. In long-term, users considering a community facility plan, actively promoting activities, methods and operating system support for the government in the continuing policy and management is needed, when the National Rental Housing are planned to build. Therefore, the organic aspects such as the development and operation of the community program as well as the physical aspects such as the community space and facilities for the active community of the National Rental Housing are constantly considered in the follow-up studies.

대기압 플라즈마 제트의 기체 유량에 대한 방전 특성

이원영,김동준,김윤중,한국희,유홍근,김현철,진세환,구제환,김도영,조광섭,Lee, Won Young,Jin, Dong Jun,Kim, Yun Jung,Han, Gook Hee,Yu, Hong Keun,Kim, Hyun Chul,Jin, Se Whan,Koo, Je Huan,Kim, Do Young,Cho, Guangsup 한국진공학회 2013 Applied Science and Convergence Technology Vol.22 No.3

The influence of gas flow on the plasma generation in the atmospheric plasma jet is described with the theory of hydrodynamics. The plasma discharge is affected by the gas-flow streams with Reynolds number (Re) as well as the gas pressure with Bernoulli's theorem according to the gas flow rate inserted into the glass tube. The length of plasma column is varied with the flow types such as the laminar flow of Re<2,000 and the turbulent flow of Re>4,000 as it has been known in a general fluid experiments. In the laminar flow, the plasma column length is increased as the increase of flow rate. Since the pressure in the glass tube becomes low as the increase of flow velocity by the Bernoulli's theorem, the breakdown voltage of plasma discharge is reduced by the Paschen's law. Therefore, the plasma length is increased as the increasing flow rate with the fixed operation voltage. In the transition of laminar and turbulent flows, the plasma length is decreased. When the flow becomes turbulent as the flow rate is increasing, the plasma length becomes short and the discharge is shut down ultimately. In the discharge of laminar flow, the diameter of plasma beam exposed on the substrate surface is kept less than the glass diameter, since the gas flow is kept to the distinct distance from the nozzle of glass tube.

기록물분류의 원리 : 문헌분류와의 비교

이원영,Lee, Won-Young 한국기록학회 2000 기록학연구 Vol.0 No.2

The classification of records is basically different from that of librarian materials because records have a nature of spontaneous and correlated product made during the process of work, as well as a value of proof and information. Hence the main task of archival management institute is to classify those records through the process of transfer and receipt for the purpose of reservation and utilization of their value. Therefore, the records should be classified by the manner, which reflects the function and organization of producing institute, and in turn, the principles of producing site and original record order should be maintained for this purpose. The characteristics of librarian materials and records and the tasks of management institutes form the basis of very different principles. The records can present the characteristics of producing institute and maintain the value made by the correlated nature as they are classified, managed and preserved by the above principles, In addition, it is known how and why they were produced and utilized, as well as they can be preserved in original form and effectively arranged, recorded and managed.

국회 외부관계 기능의 다큐멘테이션 전략에 관한 연구

이원영,Lee Won-Young 한국문헌정보학회 2005 한국문헌정보학회지 Vol.39 No.3

The most important goal of records management is to document the administrative responsibility of the institution producing records and its history. For this purpose, each institution needs to make a plan determining kind and value of phenomena and evidences to be documented, that is, a plan for documentation. This study was aimed to present its necessity and stretagy, focussing on the documentation of correlations with external factors surrounding National Assembly (external relations). Through literature survey, external relation functions of congress and important sources associated with their functions were analyzed. and what records were produced from those sources was investigated in the case of U.S. Congress. Comparing with the present state of National Assembly on this basis, four significant subjects to activate the external relations documentation plan in the point of institutional policy of National Assembly were proposed : legislation of documentation program of external relations, acquisition policy, advocacy enforcement for National Assembly Documentation, and establishment of cooperation and support systems with external factors.

횡단경사면에서 지능형 보행보조로봇의 직진성 향상 방안 연구

이원영,엄수홍,장문석,권오상,이응혁,Lee, Won-Young,Eom, Su-Hong,Jang, Mun-Suck,Kwon, O-Sang,Lee, Eung-Hyuk 대한전자공학회 2013 전자공학회논문지 Vol.50 No.9

본 논문은 지능형 보행보조로봇이 횡단경사면주행에 있어 직진성 향상 알고리즘을 제안한다. 보행보조로봇은 횡단경사면주행시 로봇의 무게와 경사도에 의해 발생되어지는 회전모멘트의 영향을 받아 경로 이탈을 하게 된다. 이를 보정하기 위해 사용자가 입력하는 목표 회전각속도와 로봇의 회전각속도와의 비교를 통해 각 구동축에 가중치를 인가하는 알고리즘을 적용하였다. 제안한 보정 제어기를 실\제 보행보조로봇에 적용한 결과 횡단경사면 이동시 Yaw 축 이탈거리는 무보정 실험의 경우 발산하지만 Yaw 보정 알고리즘을 적용하였을 경우에는 이탈거리가 최대 20cm 이내로 안정적인 주행을 하는 것을 확인할 수 있었으며, 이탈거리 변화율 또한 300cm 이후 안정화되어 더 이상의 변화가 발생하지 않는 것을 확인할 수 있었다. In this paper, we propose the algorithm that improves the linearity of the walking assistant robot on lateral slopes. The walking assistant robot goes out of the course due to the rotational moment which is caused by the weight of the robot and the slope. To compensate this, we give the weight to each driving axle after comparing the real rotational angular velocity with the target rotational angular velocity which is entered by an user. The results of applying the algorithm to the real walking assistant robot show that the yaw axis deviation of the robot without the algorithm diverges, but the yaw axis deviation of the robot with the algorithm lies within 20cm, which can be recognized as stable. In addition, the changing rate of the course deviation is stabilized and shows no more course deviation, after moving 300cm.

하악 매복 제3대구치 발치 시 Articaine HCl과 Lidocaine HCl의 국소마취 효능에 대한 비교연구

이원영,서광석,김현정,염광원,박창주,Lee, Won-Young,Seo, Kwang-Suk,Kim, Hyun-Jeong,Yum, Kwang-Won,Park, Chang-Joo 대한치과마취과학회 2004 Journal of Dental Anesthesia and Pain Medicine Vol.4 No.1

Background: Articaine, a new amide-type local anesthetic, was recently commercially available in Korea. The purpose of this study was to compare the anesthetic efficacy between articaine HCl and lidocaine HCl for the surgical extraction of bilateral mandibular impacted third molars. Patients and Methods: Forty young and healthy patients with bilateral impacted third molars were selected with permission. Randomly, one side of impacted third molar was operated under local anesthesia using 4% articaine and the other side under 2% lidocaine after 1 or 2 week recovery time. Intraoperative pain was evaluated via 0-10 cm visual analog scale (VAS) by both the patient and operator immediately after the operation. After 1 day and 7 days, the complications of local anesthesia were checked. Results: The pain VAS scores in articaine group, evaluated by both the patient and operator, were lower than those in lidocaine group, but they were not statistically significant (P = 0.44 and 0.54, respectively). The incidence of complications of local anesthesia between articaine and lidocaine was similar. Conclusion: In this study, articaine showed at least equal efficacy compared to lidocaine. The further dose-controlled study with more pharmacokinetic parameters will be needed.

제 1족근-중족관절 과운동성과 중등도 이상의 변형을 동반한 무지외반증에 대한 변형 Lapidus 술식의 결과

이원영,성기선,정재훈,Lee, Won Young,Sung, Ki-Sun,Chung, Chaehoon 대한족부족관절학회 2017 대한족부족관절학회지 Vol.21 No.3

Purpose: The objective of this study was to confirm the results of the modified Lapidus procedure on moderate to severe hallux valgus patients with first tarso-metatarsal joint hypermobility. Materials and Methods: A retrospective study was conducted on 42 cases of 35 patients who underwent the modified Lapidus procedure between March 2006 and December 2014. A comparative analysis was performed on the preoperative and postoperative subjective satisfaction of patients and radiologic index. Moreover, the correlation between the follow-up time and patient's operative satisfaction, as well as between the proficiency of the operator and patient's operative satisfaction was analyzed. Complications were also evaluated. Results: Out of the total of 35 patients, 3 were male and 32 were female. The mean age was 61.3 years (range, 34~79 years), and the mean follow-up time was 22.1 months (range, 6~90 months). The overall satisfaction level was 67.6% and the mean hallux valgus angle improved from preoperative $40.5^{\circ}$ to postoperative $12.2^{\circ}$ (p<0.001). The mean 1, 2 intermetatarsal angle improved from preoperative mean of $16.9^{\circ}$ to postoperative mean of $7.6^{\circ}$ (p<0.001), and the sesamoid position improved significantly, from preoperative 2.7 to postoperative 0.9 (p<0.001). Furthermore, there was no correlation between the follow-up time and the American Orthopaedic Foot and Ankle Society (AOFAS) hallux scale; also no correlation between the year the operation took place and the AOFAS hallux scale. In terms of complications, we observed screw irritation in 6 cases, hallux varus in 2 cases, and recurrence of hallux valgus and nonunion in one case. Conclusion: Contrary to our concerns, the level of complications was not high; however, the satisfaction level of patients was also not very high. Therefore, careful selecting of patients and sufficient consultation time is needed before surgery. In addition, since the causes of postoperative dissatisfaction still remain unclear, further studies are necessary.

미혼여성들의 신부화에 대한 선호도에 관하여

이원영(Lee Won-Young),조근호(Cho Keun-Ho),박천호(Pak Chun-Ho) 한국원예학회HST 1998 원예과학기술지 Vol.16 No.3

Frequency Ratio와 Evidential Belief Function을 활용한 산사태 유발에 대한 환경지리적 민감성 분석과 검증 - 2013년 춘천 산사태를 중심으로 -

이원영 ( Lee Won Young ),성효현 ( Sung Hyo Hyun ),안세진 ( Ahn Sejin ),박선기 ( Park Seon Ki ) 한국지형학회 2020 한국지형학회지 Vol.27 No.1

The objective of this study is to characterize landslide susceptibility depending on various geo-environmental variables as well as to compare the Frequency Ratio (FR) and Evidential Belief Function (EBF) methods for landslide susceptibility analysis of rainfall-induced landslides. In 2013, a total of 259 landslides occurred in Chuncheon, Gangwon Province, South Korea, due to heavy rainfall events with a total cumulative rainfall of 296~721mm in 106~231 hours duration. Landslides data were mapped with better accuracy using the geographic information system (ArcGIS 10.6 version) based on the historic landslide records in Chuncheon from the National Disaster Management System (NDMS), the 2013 landslide investigation report, orthographic images, and aerial photographs. Then the landslides were randomly split into a testing dataset (70%; 181 landslides) and validation dataset (30%; 78 landslides). First, geo-environmental variables were analyzed by using FR and EBF functions for the full data. The most significant factors related to landslides were altitude (100~200m), slope (15~25°), concave plan curvature, high SPI, young timber age, loose timber density, small timber diameter, artificial forests, coniferous forests, soil depth (50~100cm), very well-drained area, sandy loam soil and so on. Second, the landslide susceptibility index was calculated by using selected geo-environmental variables. The model fit and prediction performance were evaluated using the Receiver Operating Characteristic (ROC) curve and the Area Under Curve (AUC) methods. The AUC values of both model fit and prediction performance were 80.5% and 76.3% for FR and 76.6% and 74.9% for EBF respectively. However, the landslide susceptibility index, with classes of ‘very high’ and ‘high’, was detected by 73.1% of landslides in the EBF model rather than the FR model (66.7%). Therefore, the EBF can be a promising method for spatial prediction of landslide occurrence, while the FR is still a powerful method for the landslide susceptibility mapping.