양자 키 분배 프로토콜 BB84 와 B92 에서 도청률과 기저의 수에 따른 error rate 비교

이선아 ( Sun-ah Lee ),문봉교 ( Bong-kyo Moon ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2

양자 암호통신에서는 키를 실시간으로 안전하게 분배하는 양자 키 분배방식이 핵심이다. 본 논문에서는 양자 키 분배 방식인 BB84 protocol 과 B92 protocol 을 python 으로 구현(이를 Lee’s code 라 명명)한다. 기존에 존재하는 양자 simulator 와 LEE’s code 를 이용해 error rate 의 차이를 두 가지 관점(기저에 따른 차이, 도청률에 따른 차이)에서 비교한다. 이를 바탕으로 어떤 protocol 이 도청자로부터 더 취약한지 알아본 결과, B92 protocol 의 QBER 이 항상 높으므로 도청자를 잡아내기는 쉽지만, 기저가 두 가지 밖에 없으므로 도청자의 공격에는 취약함을 알 수 있다.

천연 인조 토끼털의 주관적 평가 및 물리적 성질에 관한 연구

이선아,김종준,Lee, Seon Ah,Kim, Jongjun 한국패션비즈니스학회 2017 패션 비즈니스 Vol.21 No.4

Fur garment has long been the conventional symbol for luxury, or conspicuous consumption. However, as fashion items began to diversify as part of overall fashion trend, fur items are now more about individual taste and style than just lavishness. Synthetic fur is especially emerging as a new promising fashion material, with a touch almost like natural fur at an affordable price. Along with the emergence of 'Vegan Fashion' trend, synthetic fur is establishing itself as a popular fashion textile. This study is an attempt to investigate subjective evaluation and physical properties of natural and synthetic furs, whose results will further serve as basic data in developing synthetic fur materials. Sensory and emotional evaluations are carried out on natural and artificial furs. For analysis, factors such as weight, thickness, air permeability, gloss and compressibility were surveyed to observe how they influence the physical properties. According to the subjective evaluation, natural and artificial fur samples do not differ in conspicuous ways in appearance. Experiments on physical properties, specifically warm/cool touch experiment, show that natural fur has a slightly higher warm sensation than artificial fur. Luster analysis by using a microscope revealed that there are subtle qualitative differences between natural and artificial fur. During the subjective evaluation, subjects found it hard to state distinct quantitative differences in luster. A survey as a means of assessing qualitative differences in gloss seems to be necessary to complement the evaluation. Results from this study will potentially serve as resources for diversification of fashion product designs using synthetic fur.

부분 무치악 임플랜트 보철 수복시 자연치와의 비고정성 연결형태에 따른 3차원 유한요소법적 연구

이선아,정재헌,Lee, Seon-A,Chung, Chae-Heon 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.1

In this study, we designed the finite element models of mandible with varying their connecting types between the prosthesis on implant fixture and 2nd premolar, which were free-standing case(Mf), precision attachment case(Mp), semiprecision attachment case(Ms) and telescopic case(Mt). The basic model of the designed finite element models, which contained a canine and the 1st & 2nd premolar, was implanted in the edentulous site of the 1st & 2nd molar by two implant fixtures. We applied the load in all models by two ways. A vertical load of 200N was applied at each central fossa of 2nd premolar and 1st implant. A tilting load of 20N with inclination of $45^{\circ}$ to lingual side was applied to buccal cusp tips of each 2nd premolar and 1st implant. And then we analyzed three-dimensional finite element models, making a comparative study of principal stress and displacement in four cases respectively. Three-dimensional finite element analysis was performed for the stress distribution and the displacement using commercial software(IDEAS program) for SUN-SPARC workstation. The results were as follows : 1 Under vertical load or tilting load, maximum displacement appeared at the 2nd premolar. Semiprecision case showed the largest maximum displacement, and maximum displacement reduced in the order of precision attachment, free-standing and telescopic case. 2. Under vertical load. the pattern of displacement of the 1st implant appeared mesio-inclined because of the 2nd implant splinted together. But displacement pattern of the 2nd premolar varied according to their connection type with prosthesis. The 2nd premolar showed a little mesio-inclined vertical displacement in case of free-standing and disto-inclined vertical displacement due to attachment in case of precision and semiprecision attachment. In telescopic case, the largest mesio-inclined vertical displacement has been shown, so, the 1st premolar leaned mesial side. 3. Under tilting load, The pattern of displacement was similar in all four cases which appeared displaced to lingual side. But, the maximum displacement of 2nd premolar appeared larger than that of the first implant. Therefore, there was large discrepancy in displacement between natural tooth and implant during tilting load. 4. Under vertical load, the maximum compressive stress appeared at the 1st implant's neck. Semiprecision attachment case showed the largest maximum compressive stress, and the maximum compressive stress reduced in the order of precision attachment, telescopic and free-standing case. 5 Under vertical load, the maximum tensile stress appeared at the 2nd implant's distal neck. Semiprecision attachment case showed the largest maximum tensile stress, and the maximum tensile stress reduced in the order of precision attachment, telescopic and free-standing case. 6. Under vertical load or tilting load, principal stress appeared little between natural tooth & implant in free-standing case, but large principal stress was distributed at upper crown and distal contact site of the 2nd premolar in telescopic case. Principal stress appeared large at keyway & around keyway of distal contact site of the 2nd premolar in precision and semiprecision attachment case, appearing more broad and homogeneous in precision attachment case than in semiprecision attachment case.

주산기아사가 있는 환아에서 나타나는 Tc - 99m ECD 뇌 단일광자컴퓨터촬영에서의 롤란도야의 혈류감소 : 자기공명영상 및 임상소견과의 비교

이선아,유영훈,이종두,황윤준,김동익,윤평호,전평,문성욱,박창일 ( Sun Ah Lee,Young Hoon Ryu,Jong Doo Lee,Yoon Joon Hwang,Dong Ik Kim,Pyeong Ho Yoon,Pyoung Jeon,Sung Wook Moon,Chang Il Park ) 대한핵의학회 1997 핵의학 분자영상 Vol.31 No.1

일부 지역에 거주하는 영아어머니의 모유수유의 중단이유와 모유수유 지식정도에 관한 조사연구

이선아,최소영,Lee, Seon-Ah,Choi, So-Young 한국가정간호학회 2002 가정간호학회지 Vol.9 No.1

The purpose of this study was to investigate the reason of interruption and the knowledge of breastfeeding. The samples of 117 mothers who have the babies between age from 1 month to 12 months were selected from one university hospital and one public health care center in J City. The data were collected with the questionnaire during the period from the January. 5. 2002 through January. 30. 2002. Analysis was done by using frequency. percentage. t-test. ANOVA. The results of this study can be summarized as follows. 1. The comparison of the method of feeding by general characteristics. income state(p= .019), rearing supporters(p=.026) and infant age(p=.03) have shown significant difference as the variables affecting breastfeeding practice rate. Breastfeeding rate were 24.8%. mixed- feeding type, 14.5%. milkfeeding type. 60.7%. 2. The major reason which breastfeeding be done was 'for health of baby'. In the period of breastfeeding, a large number of mothers answered' up to. 6 months'. The major reason of breasttfeeding interruption was 'insufficient quantity of breastmilk'. 3. The mean of knowledge on breastfeeding by feeding patterns were the highest in the breastfeeding group(F= 10.228, p= .000). 4. In a grade of each item on knowledge of breastfeeding, over 80% of mothers wrongly answered in two items; components comparison between breastmilk and cow's milk and when the mother fell sick. whether she have to be feed breastmilk. or not. In the conclusion. this study revealed that knowledge of breastfeeding promoted practice of breastfeeding. However we suggest that systemic and supportive breastfeeding program for promoting the knowledge and the practice rate of breastfeeding have to be provided by nurses.

지구자(枳?子) 산청목(山靑木) 배합(配合)이 D-galactosamine 유발 백서의 간손상에 미치는 영향(影響)

이선아,문구,Lee, Seon-A,Moon, Goo 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.1

Objectives : This study was carried out to investigate the hepatoprotective effects of mixture with Hovenia dulcis Thunb (HDT) and Acer tegmentosum Maxim(ATM) on D-galactosamine-induced liver failure in rats. Methods : The animals were divided into 4 groups: control, with liver failure and no treatment; H1A1, with liver failure and oral treatment with HDT 1 and ATM 1; H1A2, with liver failure and oral treatment with HDT 1 and ATM 2; H1A4, with liver failure and oral treatment with HDT 1 and ATM 4. The animals were treated for 3 weeks and then examinations of change of body weight, aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma glutamyl transpeptidase ($\gamma$-GTP), total cholesterol, triglyceride, total bilirubin, superoxide dismutase (SOD), catalase, histopathologic change, and complete blood count (CBC) were performed. Results : All experimental groups had significantly decreased AST in serum and markedly increased activity of SOD as compared with the control group. H1A1, and H1A4 significantly decreased ALT in serum and H1A4 at 2 weeks was significantly higher on the change of body weight as compared with the control group. In histopathologic change of liver tissue by light microscopy, all experimental groups showed recovery effects of liver cells which were damaged by D-galactosamine. Conclusions : Based upon these results, it could be assumed that a mixture of HDT and ATM has hepatoprotective and antioxidative effects on D-galactosamine-induced liver failure. Therefore, a mixture of HDT and ATM might be utilized as a protective agent in therapy for liver diseases.

중부지방 상록지피용 기린초 속의 조경용 소재 선발

이선아,하유미,한인송,Lee, Sun-A,Ha, Yoo-Mi,Han, In-Song 한국조경학회 2009 韓國造景學會誌 Vol.37 No.5

Sedum takesimenses among the Korean Native Genus Sedum was selected as evergreen ground covers during winter in the central districts of Korea. In order to obtain basic information for production as a pot flower with good quality, the effects of pinching frequencies on growth and flowering of S. takesimense were investigated. S. takesimense plant height became much shorter and numbers of lateral shoots were increased with increased pinching. Shoots of S. takesimense treated with 30% pinching during 2004 and 2005 showed greater length and less number of lateral shoots than those with 60% pinching. Leaves of S. takesimense treated with 70% shading showed a dark green color and had a longer shoot length and a lower number of shoots than cultivation under full sunlight. Therefore, Korean native S. takesimense will be utilized as ground cover treated with 70% shading or under a tree. Therefore, S. takesimense will be promising as ground cover materials in the central districts of Korea. 한국 자생 돌나물속 중 섬기린초는 상록성 식물로 중부 지방에서 겨울에 노지에서도 월동이 되므로 조경용 소재로 사용이 가능하였다. 섬기린초를 조경용 소재로 이용하기 위해 적심에 따른 생장특성을 조사하였다. 섬기린초의 적심작업에 따라 초장은 더욱 짧아져 조경용 지피식물로 사용하기 용이했으며, 신초지의 숫자는 늘어나는 경향이 나타났다. 2004년과 2005년에 실시한 연구에서 30% 적심처리를 한 섬기린초 처리구의 신초는 60% 적심처리를 한 처리구보다 초장은 더욱 길고 생장이 활발하였다. 노지에서 차광처리를 하지 않은 무처리구보다 70%의 차광처리를 한 섬기린초 처리구의 잎의 색은 진녹색이었고, 길이는 길어지고 신초의 수는 적게 되었다. 그러므로 기린초 종류 중 한국 자생식물인 섬기린초는 70%의 광을 차단하는 장소에도 식재 가능하며, 경기도 수원 지방에서 실험 결과, 내한성이 강한 편으로 중부지방에서도 상록성 조경 지피식물 소재로도 사용이 가능하다.

한(韓).중(中) 양국(兩國)의 전통사회(傳統社會)에 있어서의 의원(醫員)의 사회적(社會的) 지위(地位)

이선아,Lee, Seon-A Korean Institute of Oriental Medicine 2003 한국한의학연구원논문집 Vol.9 No.2

這篇文章是關丁韓中兩國傳統社會襄醫員的社會地位的論文. 在這篇文章通過韓中兩國社會的區別点來析韓中兩國傳統社會醫員的地位. 結論就是韓國傳統社會比中國傳統社會還閉鎖, 而韓國傳統社會醫員的社會的地位比中國還底一些.

Effect of Korean Red Ginseng on Sleep : A Randomized, Placebo-Controlled Trial

이선아,강승걸,이헌정,정기영,김린,Lee, Sun-Ah,Kang, Seung-Gul,Lee, Heon-Jeong,Jung, Ki-Young,Kim, Leen KOREAN ACADEMY OF SLEEP MEDICINE 2010 수면·정신생리 Vol.17 No.2

목 적: 인삼은 한국을 비롯한 아시아 국가에서 전통적으로 불면증의 치료에 사용되어 왔으며 쥐를 이용한 동물실험에서 수면을 촉진시키는 효과가 있다는 연구 결과가 있어왔다. 하지만 이러한 효과를 입증할 만한 임상 실험은 거의 이루어지지 않았다. 이에 본 연구에서는 고려 홍삼이 수면에 미치는 영향을 알아보고자 한다. 방 법: 건강한 성인 남성 20명을 대상으로 하였으며 이들은 무작위로 홍삼군과 위약군에 배정되어 2주간의 실험이 진행되었다. 홍삼군의 경우 하루 4,500 mg의 홍삼을 섭취하였다. 실험 시작시점과 2주 후인 종료시점에 수면다원검사를 시행하여 두군간의 변수의 변화를 비교하였다. 결 과: 총 15명의 대상자, 즉 홍삼군 8명과 위약군 7명이 수면다원검사를 시행 받았으며 홍삼군이 위약군 보다 실험 종료 시점에서 3단계 수면이 증가한(p=0.087) 반면에 2단계 수면이 감소하는(p=0.071) 경향을 나타냈다. 결 론: 본 연구 결과는 고려 홍삼이 깊은 잠은 증가시키고 얕은 잠은 감소시키는 경향이 있음을 보여준다. 이는 통계적으로 유의한 결과는 아니지만 홍삼이 수면의 질을 향상시키는 데 효과적임을 짐작하게 한다. 그러나, 보다 많은 대상군과 충분한 홍삼 용량으로 보다 긴 기간 동안 진행되는 연구를 통해 고려 홍삼의 수면에 대한 효과를 확인할 필요가 있다. Objectives: Ginseng has a long history of being used in insomnia treatment and there is some evidence from animal studies of its sleep-enhancing property. From this, it can be assumed that ginseng has sleep-promoting effect in humans. The purpose of this study was to investigate the effect of Korean red ginseng on change of sleep architecture in humans. Methods: A total of 20 healthy young males with regular sleep and wake habits and without any psychiatric nor cognitive problems were selected based on review of sleep questionnaires and sleep diaries they completed followed by an interview with a board-certified psychiatrist. The subjects were randomly assigned to red ginseng or placebo for 2 weeks of trial. The total daily dose of ginseng was 4,500 mg. The polysomnographic recordings were made at baseline and at 2 weeks after. The effects of red ginseng and placebo on sleep were assessed by comparing the changes in polysomnographic variables between the two groups. Results: A total of 15 subjects, 8 from red ginseng group and 7 from placebo group, were included to undergo polysomnographic procedures. The red ginseng group showed tendencies to increase stage 3 sleep (p=0.087) and to decrease stage 2 sleep (p=0.071) from the baseline compared with the placebo group. Conclusion: Korean red ginseng tends to increase deep sleep and decrease shallow sleep. Our result is in line, at least in part, with previous findings that Korean red ginseng increased total and NREM sleep in rats. Further studies with higher ginseng dosage, larger sample size and longer trial duration should be conducted to confirm the sleep stabilizing and balancing effects of Korean red ginseng.

一齋 李恒의 학문적 위상 확립과정과 南皐書院

이선아(Lee, Sun-Ah) 역사문화학회 2014 지방사와 지방문화 Vol.17 No.2

일재 이항은 연산군 5년(1499)에 한양에서 태어나 나이 40세에 전라도 태인에 낙향하여 학문에 전념하며 호남의 ‘人師’로서 제자를 키웠다. 이항의 제자들은 임진왜란이 일어나자 의병을 일으키는 등 창의에 앞장서서 의리를 실천하였다. 이항의 학문과 삶은 호남의 유생들에 의해 계승되었고, 이항은 ‘호남의 큰 스승[師表]’로 추숭되었다. 이항의 후손 이성익이 주도하여 『일재집』을 간행하는 과정에서 송시열, 박세채, 윤증 등 서인들이 적극적으로 후원하였고, 이 과정에서 이항은 호남의 道學者로서의 평가를 굳히게 되었다. 이러한 서인들과의 관계는 경신환국(1680) 이후 이항을 배향한 ‘남고서원’이 사액 서원이 되는 중요한 계기가 되었다. 남고서원은 숙종 10년(1684)에 김창흡과 전라도 유생 등 京鄕의 서인들의 요청에 의해 사액되었는데, 서인과 남인의 정치적 갈등이 격렬해지는 정국 하에서 서인의 주도하에 남고서원 사액이 결정되었다는 것은 그의 정치적, 사회적 지위가 서인과의 관계 속에서 공인되었다는 것을 의미한다. 이러한 호남의 도학자와 사표로서 이항의 위상은 철종 7년(1856)에 정원용이 이항에게 시호를 내려달라고 요청하고, 고종 2년(1865)에 ‘文敬’이라는 시호가 내려온 이후 확고해졌다. 또한 고종 18년(1881)에 이항을 비롯하여 ‘호남오현’을 문묘에 배향하자는 움직임이 일어나면서 이항은 호남의 대표적인 도학자로 다시 거론되었다. ‘호남오현’의 문묘 배향을 추진하는 과정에서 결집한 호남 유생들은 남고서원의 중건을 도모하였다. 그리하여 광무 3년(1899)에 이항의 후학과 호남의 유학들의 노력과 후원으로 남고서원이 중건사업이 시작되었고, 이때 이항의 제자 김점, 김복억, 김승적이 추향되었다. 사우를 중건하고 추향하는 일에 부안 김씨, 강진 김씨, 언양 김씨 문중과 이도복, 권순명, 김택술과 김형관 등 간재 전우의 직전, 재전 제자들이 참여하였다. 이항을 배향한 서원의 사액과 증시 등 公認되는 데에 시간이 걸렸지만, 그의 실천적 삶을 본받고자 하였던 호남의 유림들은 그를 호남의 ‘寓公’이자 ‘師表’로 추숭하였던 것이다. Lee Hang(李恒), who was born in Han Yang in 1499, rusticated to Tae In, Jeolla-do at the age of 40. After then, he trained disciples concentrating to his study. When Japanese Invasion of Korea broke out in 1592, his disciples took part in the war by raising up forces or provided material support to the army. These were the way they kept fidelity which they had learned from him. After that, confucian scholars in Honam area tried to follow his will, and they accepted him as the teacher as well as moralist representing Honam area. He, however, wasn’t like that from the begining. At that time, he was comparable with Lee Hwang or Jo Sik, but different from them. He gradually established reputation taking the sponsorship and support of confucian scholars in Honam area. They tried to do something for him. For example, Namgo Seowon(南皐書院) where there was his mortuary tablet was authorized by the king of Chosun dynasty, and he also was granted a posthumous epithet(諡號), ‘Mun Kyoung(文敬)’. For these efforts, his status in Honam area was getting distinct. Especially, in 1881 it was claimed that ‘the five sages in Honam(湖南五賢)’ should be canonized into the National Academy, and then he acquired firm evaluation of a scholar representing Honam area. This evaluation was passed down until 19th century, and ‘Ganjae’s literary people’ kept going on with the effort to succeed his practical study.