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      • 역할 기반의 접근제어 시스템에서 동적 의무분리 만족을 위한 설계 방법

        지희영(Hee-young Ji),박석(Seog Park) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.2Ⅰ

        역할 기반의 접근제어 시스템은 응용에 따라 보호 객체들에 대한 접근을 역할들로 분류하여 정형 트랜잭션과 데이터의 무결성을 보장하는 의무분리의 원리로 정보를 처리하는 시스템으로 편리하고 단순한 권한 관리를 제공한다. 본 논문에서는 기업 환경에 적합한 역할 기반의 접근제어 시스템에서 데이터베이스 내에 저장된 데이터에 대한 권한 없는 접근, 고의적인 파괴 및 변경을 야기하는 사고로부터 데이터베이스를 보호하기 위해 정보의 무결성 보장을 위한 의무분리의 원리를 제안한다. 그리고 제안된 원리를 기반으로 하여 적용 대상으로 상호 배타적인 부트랜잭션들을 포함하고 있는 중첩-트랜잭션을 생각해 보았으며, 여기에 동적 의무 분리 요구사항을 만족시키기 위해서 주체, 세션 기반에서 새롭게 해석하였다. 이 기법은 시스템 운영의 유연성을 향상시키고, 역할 관리를 단순화시키는 장점을 가진다. 또한 여러 트랜잭션들이 동시에 실행되는 환경하에 정보의 무결성 유지를 위해서 본 논문에서 제안한 의무분리 기법을 적용하였다. 이때 감염된 트로이언 목마에 의해 발생될 수 있는 정보의 유출문제를 해결하고자 의무분리를 위한 격자 구조를 설계하고 이를 바탕으로 해석하였다.

      • SCOPUSKCI등재

        국내 야생식용식물 7종 에탄올 추출물의 항산화 활성 비교

        지희영(Hee Young Ji),주신윤(Shin Youn Joo) 한국식품과학회 2021 한국식품과학회지 Vol.53 No.5

        본 연구는 야생에서 자란 식용식물 7종을 선정하여 항산화 물질과 활성을 측정하였다. 야생식용식물 7종 에탄올 추출물의 총페놀 함량은 찔레나무 순(57.76 mg GAE/g), 감나무 잎(46.55 mg GAE/g), 쑥 잎(41.35 mg GAE/g)순으로 높은 함량을 보였고, 총 플라보노이드 함량은 감나무 잎(46.50 mg NE/g), 쑥 잎(38.13 mg NE/g), 찔레나무 순(35.21 mg NE/g) 순으로 높은 함량을 보였다. DPPH 라디칼 소거능은 찔레나무 순(IC<SUB>50</SUB> 232.52 μg/mL), 쑥 잎(IC<SUB>50</SUB> 504.77 μg/mL), 감나무 잎(IC<SUB>50</SUB> 553.42 μg/mL)이 높았으며, ABTS<SUP>+</SUP> 라디칼 소거능은 찔레나무 순(IC<SUB>50</SUB> 470.10 μg/mL)과 감나무 잎(IC<SUB>50</SUB> 854.60 μg/mL)이 높은 활성을 보였다. superoxide− 라디칼 소거능은 찔레나무 순(IC<SUB>50</SUB> 431.88 μg/mL)이 다른 추출물들에 비해 현저히 높은 활성을 나타냈고, 아질산염 소거능은 찔레나무순(IC<SUB>50</SUB> 363.38 μg/mL)이 가장 높았고 그 다음으로 감나무 잎(IC<SUB>50</SUB> 598.97 μg/mL)이 높은 소거능을 보였다. 환원력은 각 시료별 추출액의 농도가 증가할수록 환원력도 증가하였으며, 모든 농도에서 찔레나무 순(0.39-2.47 O.D.)의 환원력이 높게 나타났다. 따라서 본 연구의 결과 찔레나무 순이 총 페놀 함량과 항산화 활성이 가장 높게 나타나 천연 항산화제로서의 활용성이 가장 높을 것으로 기대된다. In this study, we investigated the potential of 70% ethanol extracts from wild edible plants (Pueraria lobata sprout, Rosa multiflora sprout, Artemisia princeps leaf, Diospyros kaki leaf, Morus alba leaf, Robinia pseudoacacia flower, Inula britannica var. japonica flower), as natural antioxidants. The antioxidant contents and activities of extracts were examined using various methods. The measurements of total polyphenol content revealed that Rosa multiflora sprout extract had the highest value and total flavonoid content showed that Diospyros kaki leaf extract had the highest value. Antioxidant activities were the highest in Rosa multiflora sprout for DPPH (IC<SUB>50</SUB> 232.52 μg/mL), ABTS<SUP>+</SUP> (IC<SUB>50</SUB> 470.10 μg/mL), superoxide− (IC<SUB>50</SUB> 431.88 μg/mL), nitrite (IC<SUB>50</SUB> 363.38 μg/mL) scavenging activity, and reducing power (2.47 O.D.). These results suggest that the ethanolic extract of Rosa multiflora sprout is a potential source of natural antioxidants.

      • KCI등재
      • SCOPUSKCI등재

        솔잎, 녹차 및 비타민나무 잎 혼합추출물의 항산화효과

        지희영(Hee Young Ji),박민규(Min Gyu Park),주신윤(Shin Youn Joo) 한국식품과학회 2021 한국식품과학회지 Vol.53 No.3

        본 연구에서는 솔잎, 녹차 및 비타민나무 잎의 추출물과 그 혼합추출물의 항산화 활성을 조사하였다. 시료 7종의 총 폴리페놀 및 총 플라보노이드 함량은 SE가 가장 높게 나타났다. DPPH, ABTS<SUP>+</SUP> radical 소거능 및 환원력은 SE가 가장 높은 활성을 보였고, superoxide radical 소거능과 아질산염은 GE의 활성이 가장 높았다. PE는 대부분의 실험에서 녹차 및 비타민나무 잎과의 혼합추출물이 단일추출물에 비해 높은 활성을 보였다. GE는 DPPH radical 소거능(300 ppm), ABTS<SUP>+</SUP> radical 소거능(300 ppm) 및 환원력(100 및 500 ppm)에서 비타민나무 잎과 혼합추출하면 그 활성이 높아졌고, SE는 superoxide radical 소거능(100 ppm)과 아질산염 소거능(300 ppm)에서 녹차와 혼합추출하면 활성이 높아지는 경향을 보였다. 이상의 결과에서 PE는 단일 및 혼합추출물 7종 중에서 가장 낮은 활성을 나타낸 시료로 녹차 및 비타민나무 잎과 함께 혼합(PGSE)하여 사용한다면 솔잎의 낮은 항산화 활성을 개선시킬 수 있을 것으로 사료된다. 또한 본 연구 결과는 솔잎, 녹차 및 비타민나무 잎을 이용한 건강 기능성 식품 산업에서 기초자료로 활용할 수 있을 것으로 생각된다. This study investigated the antioxidant effects of complex extracts from pine needles (PN), green tea (GT), and sea buckthorn leaves (SL). Measurement of total polyphenol and flavonoid content, DPPH radical scavenging activity (DPPH), ABTS+ radical scavenging activity (ABTS), and reducing power (RP), showed that SL extract (SE) had the highest values. The superoxide radical scavenging activity (SSA) and nitrite scavenging activity (NSA) were the highest in the GT extract (GE). In most experiments, the PN extract (PE) showed higher activity in complex extracts than in single extracts. The combination of GT and SL led to a higher activity than that exhibited by GT (DPPH and ABTS at 300 ppm, RP at 100 and 500 ppm) and SL (SSA at 100 ppm and NSA at 300 ppm) alone. These results suggest that the combination of PE, GE, and SE may be a useful functional food material in the food industry.

      • 외래환자의 병원이용 경험에 관한 연구

        원삼순,지희영,이소연,김복순,현신숙,홍상희,윤정인,김정애,지성애 중앙대학교 의과대학 간호학과 간호과학연구소 1999 중앙간호논문집 Vol.3 No.2

        An objective hospitals of today should pursue is to maintain a comfortable environment for medical examinations, including medical technologies in order to provide patients with high quality medical services. The objective of this research is to examine factors, which affect the degree of contentment in outpatient medical services, remove any inconveniences or remedy them. Therefore, it eventually makes a good impression to people and makes them wish to revisit the hospital when medical services are needed. Research was conducted in a hospital attached to C University through content analysis by observation and interview. Thirty patients were interviewed from Oct.1, 1999 through Oct. 19 and data were collected, analyzed and interpreted by examinig in clinic areas. Results found by interpreting the date are as follows: 1. Need of a guideboard was found regarding finding the hospital. 2. They were classifies into three types regarding registration: confusion, unkindness and inconvenience. 3. They were classified into three types regarding receipt: unkindness, narrowness and inconvenience. 4. They were classified into three types regarding medical examination: unkindness, wait and inconvenience. 5. In finding either inspecting rooms or consultation rooms, confusion and inconvenience were pointed out but employees' kind guidance was important. 6. The waiting rooms for medicine showed that a long-waiting problem is the first thing to be solved. 7. With regard to parking, more parking space, signboards (entrance/exit), and changing parking ticket size were requested. 8. They were classified into three things regarding rest rooms: cleanness, shortage and atmosphere. 9. With respect to overall environment, two things were pointed out: one is the distinct difference between the first floor and the second floor due to repair work and the other is difficulties of depositing one's belongings. In terms of notices and other things on notice boards, it was proven that patients do not draw attention to their size, color, and design but their overall atmosphere affects the patients. Based on the results analyzed, the research has come up with plans for improvement. 1. Things can easily improved Employee's unkindness, payphone location, reservation activation for medical examination, variety in books and magazines for waiting people, guiding lines on the floor, change in numbered tickets for medicine, signboards (entrance/exit) in the parking lot, change in parking tickets, a signboard for the parking ticket booth and solving a problem of getting a stamp on a parking ticket, cleanness of rest rooms and making them no smoking area, placing potpourris, hooks and shelves in the rest rooms, strengthened visitor control, more water dispensers. 2. Things to be added or altered Subway station. bus stop. guideboards to show the location of our hospital, earlier start of medical examination, breakup special examination mainly provided in the morning and provide it even in the afternoon, providing patients with more medical examination services by specialists - currently 3~4 times per week - to let them have more opportunities to enjoy the services, examination at night, change in location and size of signboards, repairing the pole in the waiting room for medicine, change in size on electric bulletin board and waiting time reduction in the medicine room, playing programs on hospital introduction or on health instead of cable TV for those waiting for their medicine, creating comfortable atmosphere for the rest rooms, making a notice board for PR, difficult of using the (convenient) store (distance, location, difficulty of recognizing products displayed) 3. Things to add new functions or spaces Computerization in information process, more and larger booth for receipt, installation of electric board that shows charges and waiting ticket issuer, more space for people waiting in the medicine room - more space between chairs and more chairs, more space for parking lot and rest room, repair work on the second floor, placing lockers, installations of more elevators and its functional improvement, providing patients with resting place(room), store and facilities - need of cafeteria, facilities for day-care center and playing kids, shuttle bus service Regarding facilities, which are difficult to be repaired, the reserchers hope that the data on the facilities will be used as basic data when MC the is built. Also the researchers wish that modification, improvement, and repair will be made soon to make people revisit our hospital and reuse medical services and facilities it offers.

      • KCI등재SCOPUS
      • 간호대학생의 전문간호이미지에 대한 인식 : Q-방법론 적용 Q-methodological approach

        김복순,조정호,지동옥,현신숙,채정선,이소연,지희영,정은경,지성애 중앙대학교 의과대학 의과학연구소 1998 中央醫大誌 Vol.23 No.4

        Applying Q-methodology, this research analyses the image style of the nurse college students to get the data for the nursing education about the nursing professional. The research was between 1998. 8. 13 and 1998. 10. 5 with 35 students of the C-nurse college second and third grade. We gather 148 Q-statement cards and use 39 items of them. Analysis of Q-type obtained by QUANL pc program. As the result of the research, there are three styles about the nursing professional image of the student. The first type is the value-complexed style : students have conflict about the nursing as a professional, and recognize the outside viewpoint and the influence of the environment factors about the nurse as negative and skeptical. The second type is the proud style : their image about the nurse and the nursing is very positive and they try to develop the professional knowledge continuously and think of the nature of the nursing as important. The third type is in search for the profession : their perception of the nursing as a profession is very high but they have a negative viewpoint about the nurse because of the lack of the professional pride and the endeavor of the self-development. As the result of the research, the styles of the image about the nursing as a profession is available for the reconstruction of the attitude for the professional nursing and data for nursing education. We suggest the below according to the result of this research : 1. The strategic research to make the image of the nursing as a profession better has to be continuous. 2. It is necessary to compare the nurse college student with the nurse about the difference of the image of the nursing as a profession.

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