클럭 카운트를 이용한 스트림 암호의 OTP 인증 프로토콜

조상일(Sang-il Cho),이훈재(Hoon-jae Lee),임효택(Hyo-taek Lim),이상곤(Sang-gon Lee) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.7

선천 긴속눈썹증

조상일(Sang Il Cho),유인천(In Cheon You),조남천(Nam Chun Cho),안 민(Min Ahn) 대한안과학회 2021 대한안과학회지 Vol.62 No.2

목적: 7세 여자아이에서 발생한 긴속눈썹증 1예를 보고하고자 한다. 증례요약: 7세 여자아이가 영유아 검진시 발견된 시력저하를 주소로 내원하였다. 내원 당시 나안시력 우안 0.2, 좌안 0.3이었으며, 양안 상, 하안검 속눈썹의 길이와 수의 증가를 보였다. 양안 속눈썹의 길이는 주변부에서 10 mm, 중심부에서 15 mm였다. 경도의 속눈썹의 각막찌름과 경도의 안검하수가 관찰되었으며 추가로 시행한 안저검사 및 시유발전위검사에서 특이 소견은 발견되지 않았다. 긴속눈썹증의 가족력은 없었으며 긴속눈썹증을 일으킬 만한 특이 소견은 발견되지 않았다. 혈액검사상 이상 소견은 없었으며 특이 약물 복용력 또한 없었다. 현재 긴속눈썹증 진단하에 경도의 시력저하 및 안검하수로 경과 관찰 중이다. 결론: 긴속눈썹증은 가족력 및 다양한 선천성 질환, 후천적 요인에 의하여 발생하는 것으로 알려져 있으나 특별한 원인 없이 선천적으로 발생하는 경우도 있으므로 이에 대하여 주지할 필요가 있다. Purpose: To report a case of congenital trichomegaly. Case summary: A 7-year-old girl visited our clinic with decreased visual acuity. The uncorrected visual acuity was 0.2 in the right eye and 0.3 in the left eye. The length and number of upper and lower eyelashes were increased. The eyelash length was 10 mm on the peripheral edge and 15 mm in the central area. Trichiasis and ptosis were also noted. There were no abnormal findings in the additional fundus examination or visual evoked potential test. There was no family history of trichomegaly, no abnormalities in blood test results, and no medication history. The patient is currently undergoing follow-up treatment for low visual acuity and mild ptosis under the diagnosis of trichomegaly. Conclusions: Trichomegaly is associated with family history, various congenital diseases, and acquired diseases. However, it may occur congenitally, without specific causes.

연구보문 : 자연과학; 생장억제제 및 건조제 처리가 호밀 생육 및 종자에 미치는 영향

조상균 ( Sang Kyun Cho ),박형호 ( Hyeong Ho Park ),오영진 ( Young Jin Oh ),조광민 ( Kwang Min Cho ),장윤우 ( Yun Woo Jang ),송태화 ( Tae Hwa Song ),박태일 ( Tae Il Park ),강현중 ( Hyun Jung Kang ),노재환 ( Jae Hwan Roh ),박광근 ( 한국국제농업개발학회 2013 韓國國際農業開發學會誌 Vol.25 No.3

Desiccant was treated to find a way to shorten clum length and protect lodging of rye with Ethephon and a way to advance the harvest time without affecting germination. The results of the desiccant process are as follows for the change of harvest time and seed quality. As for Ethephon treatment, the earing date was delayed two days at the concentration of 250 ppm for the booting stage that when there is no treatment, 5 days later at the concentration of 1,000 or more ppm but no difference for the flowering and maturity stage. The culm length getting shorter as the concentration of Ethephon is higher and the decreasing rate of culm length damaged is 40.1% for 1,500 ppm of booting stage, which is the most effective processing, and the base part culm length damage rate is bigger than the superior upper part culm length decrement rate. Ther was no difference according to the treatment at the number of spike, culm and litter weight but one thousand grain weight was slightly higher in the treatment. There was no any difference in the rate ratio of germination. Yield tended to increase regardless of processing concentration. It reached up to 8% at maximum. The treatment with Ethephon turned out to be the most effective at 1,000 ppm during heading date-time. The number of days it takes from the desiccant treatment to the moisture content for harvesting time is respectively 20 days for seeds of 30 day-treatment, 10 days for seeds of 35 to 45 days-treatment and 5 days for seeds of 50 day-treatment.. As for the harvest time after treatment of desiccant, the treatment at 30th days after the earing is 14 days earlier than the culture by conventional methods, 9 days earlier for the treatment at 35th to 40th day, 4 days earlier for the treatment at 45th to 50th day. When treatment of desiccant is implemented, the one thousand grain weight is heavier as the number of days of treatment gets later. The ratio of germination gets higher as the number of days of treatment after heading gets later but there is no statistically significant difference treated 40 days after the heading. As for the yield of seeds are 30% compared to the culture by conventional methods for the treatment of 30 days after the heading, 48% compared to the culture by conventional methods for the treatment of 35 days after the heading, and 74% compared to the culture by conventional methods for the treatment of 40 days after the heading. Seed quality decreased a bit but it had still eligible as seed. The processing timing of desiccant for the earliest harvest was 40 days after heading date-time during which germination was not affected.

Priming 처리 조건이 참깨 종자의 발아에 미치는 영향

조상균 ( Sang Kyun Cho ),심강보 ( Kang Bo Shim ),오영진 ( Young Jin Oh ),이상복 ( Sang Bok Lee ),이정준 ( Jung Joon Lee ),조광민 ( Kwang Min Cho ),박태일 ( Tai Il Park ),한옥규 ( Ouk Kyu Han ),김기종 ( Kee Jong Kim ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4

This experiment was carried out to investigate the effect of priming conditions on enhancing germination of sesame(Sesamum indicum L.) seed. The PEG 6000 with -0.75MPa under 15oC for four days was most adaptable treatment for the establishment of optimum priming conditions of sesame seed under low and high temperature. Priming treatment of sesame seed showed to promote germination rate at the early stage to reduce the time of T50. Optimum treatment temperature was 15 rather than 20oC in view of T50 test. This experiment suggested that priming treatments to sesame seed were an effective technique enhancing seed germination and shortening time to the T50 at the field condition, but the efficiency would be strongly dependent on individual or integrated conditions of priming agent, concentration, temperature, duration as well as physiochemical seeds properties, meteorological condition.

디지털 콘텐츠 보호에 적합한 암호알고리즘 제안

조상일 ( Sang-il Cho ),이훈재 ( Hoon-jae Lee ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.1

최근의 통신망의 급격한 발전으로 디지털 콘텐츠 분야에서도 고화질/고용량으로 변모하고 있으며, 이러한 환경속에서 콘텐츠의 안전한 보호를 위한 고비도, 고속화 및 고신뢰도 암호 알고리즘의 설계가 요구되고 있다. 본 논문에서 제안된 Threshold clock-controlled LM은 클럭 조절형 암호 알고리즘의 클럭 최대 주기를 최소화시켜 키 수열의 발생 속도를 향상 시켰으며 128비트 키, 128 초기화 백터, 그리고 257 비트의 내부 상태를 가지며, 128-비트의 보안 레벨을 유지함으로써 안전성이 보장되어 고화질/고용량의 디지털 콘텐츠 보호에 적합함을 알 수 있다.

교사의 교육실습지도 직무만족도와 예비유아교사의 교직관 및 실습불안

조상일(Cho Sang Il),박유미(Park Yu-Mi),최인숙(Choi In-Sook) 한국열린유아교육학회 2011 열린유아교육연구 Vol.16 No.5

본 연구는 교육실습 전후에 예비 유아교사의 교직관 및 실습불안의 변화와 교사의 교육실습지도 직무만족도와 예비유아교사의 교직관 및 실습불안의 관계에 대한 연구이다. 연구대상은 예비유아교사 171명, 실습 지도교사145명이며, 교육실습 전후에 예비유아교사의 교육관, 실습불안 관련 도구를 사용하여 각각의 차이를 t검증을 통하여 분석하였다. 또한 교육실습 후에 실습지도교사의 직무만족도에 따른 예비유아교사의 교직관, 실습불안의 관계를 SPSS 18.0 상관프로그램을 사용하여 비교?분석하였다. 연구결과에 따르면 예비유아교사들은 교육실습 전후에 교육관과 실습불안에 차이가 나타났다. 또한 교사의 교육실습지도 직무만족도와 예비유아교사의 교직관은 교직에 관한 인식, 전문적 자질, 개인적 자질에 긍정적 상관관계가 나타났으며, 교육실습지도 직무만족도와 예비유아교사의 실습불안은 실습불안의 전영역에 상관관계가 나타났다. The purpose of this study was to investigate the relationship between teacher’s satisfactions about the guidance of student teaching and early childhood student teacher’s view and anxiety of teaching process. The participants of were 154 early childhood student teachers and 135 teachers in Chungcheongnam-do. The collected data were analyzed by t-test and multiple regression using the SPSS/PC Computer Program. The major results of this study were as follows: First, the staged applications of a practice teaching showed significant influence on early childhood student teacher’s view and anxiety of teaching process. Second, it showed that the staged application of teacher’s satisfaction about the guidance of student teaching have significant influence on early childhood student teacher’s view and anxiety of teaching process. Concretely it showed the positive correlation between their satisfaction and cognition of the teaching profession, professionality, and individual quality.

KSR-Ⅲ Rocket 종합 시험 설비에서 발생한 열-음향 불안정 현상에 관한 연구

조상연(Sang Yeon Cho),강선일(Sun Il Kang),한상엽(Sang Yeop Han),조인현(In Hyun Cho),오승협(Seung Hyub Oh),이대성(Dae Sung Lee) 한국소음진동공학회 2002 한국소음진동공학회 심포지엄 Vol.2002 No.1

KSR-Ⅲ Rocket 종합 시험 설비에서 발생한 열-음량 불안정 현상에 관한 연구

조상연(Sang Yeon Cho),강선일(Sun Il Kang),한상엽(SangYeop Han),조인현(In Hyun Cho),오승협(Seung Hyub Oh),이대성(Dae Sung Lee) 한국소음진동공학회 2002 한국소음진동공학회 학술대회논문집 Vol.2002 No.11

진균각막염의 임상양상 및 예후 : 20년간의 변화 분석

조상일(Sang Il Cho),박영명(Young Myoung Park),안민(Min Ahn)조남천(Nam Chun Cho),유인천(In Cheon You) 대한안과학회 2021 대한안과학회지 Vol.62 No.7

목적: 최근 20년간 국내에서 발생된 진균각막염 환자의 임상양상, 원인균, 치료, 예후 등의 변화에 대해 알아보고자 하였다. 대상과 방법: 본원에서 각막염으로 진단받고 시행한 각막찰과 및 배양검사에서 진균이 검출된 177안의 의무기록을 후향적으로 조사하였다. 성별, 연령, 선행 요인, 원인균, 임상양상, 치료 방법, 예후 등을 분석하였다. 또한 배양과 KOH염색 여부에 따라 KOH양성그룹, 배양양성그룹, KOH-배양동시양성그룹으로 나누어 조사하였다. 불량한 임상결과와 관련 있는 위험인자를 로지스틱 회귀분석으로 조사하였다. 결과: 대상 환자의 평균연령은 67.4 ± 11.3세였고, 남자가 107명(60.5%)이었다. 진균각막염 발생의 위험인자는 안외상(57.6%), 특히 식물에 의한 외상(29.4%)이 많았다. 가장 흔한 사상진균은 푸사륨 49균주(31.6%)였고 효모균은 칸디다 17균주(11.0%)였다. 진균과 세균이 함께 배양된 41안 중 사상진균과 그람양성균이 29안(70.7%)으로 많았다. 치료 후 시력이 호전된 경우는 KOH양성그룹이 19명(79.2%), 악화된 경우는 배양양성그룹이 36명(40.4%)으로 흔하였다. 다변량분석에서 불량한 임상결과의 위험인자는 이전의 안질환(odds ratio [OR]: 3.744, p=0.010), 전방축농(OR: 2.941, p=0.030), 수술적 치료를 받은 경우(OR: 24.482, p<0.001)였다. 결론: 진균각막염은 KOH만 양성이면 임상양상이 양호하였고, 배양에서 균이 확인되면 심하였다. 진균이 의심되면 초기에 KOH염색과배양검사를 해야 하고, 불량한 임상결과의 위험인자가 있을 경우 조기에 최대한 약물치료를 시행해야 한다. Purpose: To describe the clinical manifestations, causative organisms, treatment, and prognostic factors of fungal keratitis based on analysis of patients over the past 20 years. Methods: A total of 177 patients (177 eyes) with fungal keratitis, who were diagnosed by smears and cultures, were reviewed retrospectively. Sex, age, predisposing factors, causative organisms, clinical manifestations, treatment, and prognosis were evaluated. The patients were divided into three groups: only potassium hydroxide (KOH)-positive, only culture-positive, and KOH- and culture-positive. Logistic regression was performed to identify the factors associated with a poor clinical outcome. Results: The mean age of the patients was 67.4 ± 11.3 years; 107 (60.5%) patients were men. The most common predisposing factor was ocular trauma (57.6%), especially by plants (29.4%). The most prevalent filamentous fungi were Fusarium species (31.6%, 49 isolates), and the most prevalent yeasts were Candida species (11.0%, 17 isolates). In cases of bacterial and fungal keratitis, filamentous fungus with Gram-positive bacterial infection (70.7%, 29/41) was the most common presentation. Visual improvement after treatment was common in the KOH-positive group (79.2%, 19/24), while visual deterioration after treatment was common in the culture-positive group (40.4%, 36/89). Previous ocular disease (odds ratio [OR]: 3.744, p = 0.010), hypopyon (OR: 2.941, p = 0.030), and surgical treatment (OR: 24.482, p < 0.001) were risk factors for a poor clinical outcome in the multivariate logistic regression model. Conclusions: Clinical prognosis was good in the KOH-positive only group, but poor in the culture-positive group. If fungal keratitis is suspected, diagnostic KOH staining and culture tests should be performed initially. Early intensive antifungal medical treatments are necessary for patients with risk factors for poor clinical outcomes.

보육실습생의 역할에 대한 유아교육전공자와 비전공자간의 인식비교

조상일(Sang-il Cho) 한국의료정보교육협회 2016 보건의료생명과학논문지 Vol.4 No.1

이 연구는 유아교육전공자와 비전공자(사회복지,언어치료)간에 보육실습 후 두 집단간 보육실습 기간 중 실습생 역할에 대해 전공여부, 출신지별, 경제적 배경별로 차이가 있는가의 연구이다. 결론은 전공여부, 출신지별, 경제적 배경별로 차이가 없음이 나타났다. 따라서 유아교육기관과 보육시설의 통합에 관해 실습측면에서 보면 유보통합을 지지하는 연구이다. The purpose of this paper is to investigate whether the perceptions of the majors and non-majors (i.e., the majors of Social Welfare and Communication Disorders) in Early Childhood Education concerning childcare traineeship students’ role awareness will have varied by hometowns, majors or economic backgrounds within the two month period of Childcare Traineeship. The present study has come to the conclusion that it has shown no significant variation by hometowns, majors or economic backgrounds. Accordingly, this study supports the proposal for a generally reserved integration of early childhood educational facilities and childcare facilities in terms of traineeship.