인텔의 HPC 전략 및 방향

나승주 한국전산유체공학회 2016 한국전산유체공학회 학술대회논문집 Vol.2016 No.7

人本主義 企業시스템에 관한 考察

나승주 경기대학교경영대학원 1992 最高經營者課程 經營硏究 Vol.5 No.-

Is it possible to introduce an interview to the Korean Medical Licensing Examination to assess professional attributes?: a survey-based observational study

나승주,노혜린,천경희,박경혜,김도환 한국보건의료인국가시험원 2022 보건의료교육평가 Vol.19 No.-

Purpose: This study aimed to gather opinions from medical educators on the possibility of introducing an interview to the KoreanMedical Licensing Examination (KMLE) to assess professional attributes. Specifically following topics were dealt with: the appropriatetiming and tool to assess unprofessional conduct; the possiblity of prevention of unprofessional conduct by introducing an interview tothe KMLE; and the possibility of implementation of an interview to the KMLE. Methods: A cross-sectional study approach based on a survey questionnaire was adopted. We analyzed 104 pieces of news about doctors’ unprofessional conduct to determine the deficient professional attributes. We derived 24 items of unprofessional conduct and developed the questionnaire and surveyed 250 members of the Korean Society of Medical Education 2 times. Descriptive statistics,cross-tabulation analysis, and Fisher’s exact test were applied to the responses. The answers to the open-ended questions were analyzedusing conventional content analysis. Results: In the survey, 49 members (19.6%) responded. Out of 49, 24 (49.5%) responded in the 2nd survey. To assess unprofessionalconduct, there was no dominant timing among basic medical education (BME), KMLE, and continuing professional development(CPD). There was no overwhelming assessment tool among written examination, objective structured clinical examination, practiceobservation, and interview. Response rates of “impossible” (49.0%) and “possible” (42.9%) suggested an interview of the KMLE prevented unprofessional conduct. In terms of implementation, “impossible” (50.0%) was selected more often than “possible” (33.3%). Conclusion: Professional attributes should be assessed by various tools over the period from BME to CPD. Hence, it may be impossible to introduce an interview to assess professional attributes to the KMLE, and a system is needed such as self-regulation by the professional body rather than licensing examination.

GCP의 쇄석과 모래의 배합비 별 응력분담비

나승주,김민석,박경호,김대현 한국지반공학회 2016 한국지반공학회논문집 Vol.32 No.9

Gravel compaction pile (GCP) is widely used as it increases the bearing capacity of soft ground and reduces theconsolidation settlement. Stress concentration ratio for GCP design is dependent on the area replacement, surcharge pressureand depth. However, a range of stress concentration ratio obtained through field, laboratory experiments and numericalanalysis is large. Little study has been done on the stress concentration ratio for the mixing ratio of gravel and sand. The main objective of the study is to evaluate the stress concentration ratio for both area replacement ratio and mixingratio through literature review and numerical analysis. Numerical analysis using the finite element program ABAQUS6.12-4 has been performed for the composite ground with GCP. The excess pore water pressure and stress concentrationratio of composite ground have been analyzed for both the area replacement ratio and the mixing ratio. Based on theprevious research results, a range of stress concentration ratio obtained from the field tests, laboratory tests, numericalanalysis on the GCP studies is found to be 1.7-3.2, 2.0-7.5 and 2.0-6.5, respectively. Based on the numerical analysisresults, as the area replacement ratio increases, the stress concentration ratio increases up to 30% and then decreasesat 40%. Also, the stress concentration ratio tends to increase up to 70:30 and then to decrease after 60:40.

Continuous Flow Analyzer(CFA)를 이용한 담배 주류연 중 Hydrogen Cyanide(HCN)의 최적 분석방법 구명

나승주,어성재,김도연,복진영,황건중,Na, Seung-Ju,Eo, Sung-Je,Kim, Do-Yeon,Bock, Jin-Young,Hwang, Keon-Joong 한국연초학회 2009 한국연초학회지 Vol.31 No.1

Hydrogen cyanide (HCN) is present in both the particulate and vapor phase of cigarette mainstream smoke. It is one of the 44 harmful substances on Hoffmann's list and is known to be a major ciliatoxic agent in cigarette mainstream smoke. Typically the determination of HCN in cigarette mainstream smoke has been done through colorimetric and electrochemical techniques, such as UV-spectrophotometry (UV), continuous flow analyzer (CFA), ion chromatography (IC) and capillary GC-ECD. In particular, CFA commonly has been using analysis hydrogen cyanide in cigarette smoke and the basic principle is pyridine-pyrazolone reaction. In this study, the more optimized analytical method is suggested isonicotinic acid-pyrazolone reaction method than previous pyridine-pyrazolone reaction method, a commonly used method for the determination of cyanide in water and air, by CFA. Sample collection was optimized by trapping particulate and vapor phase of smoke separately. The optimum NaOH concentration of the trapping solution was shown to be 0.2 M. HCN was stable up to 6 hours in this concentration but only 3 hours in 0.1 M solution. The sensitivity of this method was fairly good and it might be used in analysis of HCN in cigarette mainstream smoke.

삼림훼손토양 복원을 위한 부숙토개발 연구

나승주,장기운,양희영,전한기,이종진 유기성자원학회 2005 유기물자원화 Vol.13 No.2

To study the development of solid waste compost to use sewage sludge and paper mill sludge for reclaiming damage soil in forest, the changes of temperature, moisture, chemical properties, heavy metals and harmful compound during the aerobic decomposition were investigated, and the compost decomposition of final products investigated the round paper chromatography method and G.I(Germination index) value. The results were summarized as follows. Temperature was changed a little during early 5days because of air temperature too low. That was rapidly increased to over 50℃ at 4days after first turning and then decreased gradually fallen to 40∼50℃ at 15days after aerobic decomposition in A and C treatments. The second turning was conducted at 18 days after aerobic decomposition, and then the temperature was little changed. At the compare first with terminal product, The moisture content was decreased all treatments but the change was little in A and B treatments. pH was decreased to below 1 in all treatments. EC was increased to below 5dS/m. The content of total carbon, C/N ratio, NH4+-N were decreased with 4∼7%, below 8 and below 500mg/kg in all treatments, respectively. The content of total nitrogen, NO3--N, CEC were increased with below 0.5%, below 173mg/kg and over 30cmol+/㎏ in all treatments, respectively. The content of heavy metals and harmful compound were similar during aerobic decomposition and suited to standard of 가 grade in all treatments. The result of round paper chromatography method and G.I. value, The C treatment concluded well aerobic decomposition. Especially, the G.I. value in C treatment was 64.1 and 66.2 at cabbage and grass, respectively. 산림훼손토양 복원 유기성소재로 부숙토를 제조하기 위하여 하수슬러지와 제지슬러지의 혼합에 따른 부숙토 제조과정중의 온도변화는 외부온도가 낮았던 초기 5일간은 변화가 없었으나 5일차에 1차 뒤집기 이후 A, C처리구는 각각 10, 9일차에 50℃ 이상으로 온도가 증가된 후 15일 이후 감소하는 경향을 나타내었다. 부숙화 18일에 2차 뒤집기 이후 온도변화는 10℃이하로 주발효 종료시점으로 판단되었고 이후 후숙기간 동안 온도는 점차 낮아져 30일차에는 안정화되었다. 수분함량은 모든 처리구가 9일차부터 감소하는 경향을 나타내었으나 부자재의 혼합이 적은 A, B처리구는 수분감소량이 1일차와 36일차에 비슷하였다. pH변화는 5에서 10일 사이 약 pH 1 감소를 하였으나 10일 전후를 기준으로 다시 상승하여 36일차에는 1일차와 비교하여 약 pH 0.4 내외의 감소를 보였다. 총탄소 함량은 4∼7% 감소하였으며 총질소는 0.5%이내 증가하는 결과를 보였다. C/N율은 모든 처리구에서 8 이내 감소하였다. 암모니아태 질소는 500mg/kg 이내 감소하고 질산태 질소는 173mg/kg 이내 증가하는 경향을 나타내었다. 양이온치환용량(CEC)은 모든 처리구에서 30cmol+/㎏ 이상 증가하는 경향을 나타내었다. 부숙토 제조과정 중 중금속의 함량은 초기와 최종에서 큰 변화는 없었으며 공정규격 가 등급에 적합하였다. 부숙도 판정에서 C처리구가 원형여지크로마토그래피에서 완숙은 아니지만 부숙이 진행된 것을 확인할 수 있었고 식물독성 실험에서도 배추와 잔디에서 각각 64, 66의 G.I값을 나타내어 처리구 중 가장 높은 부숙도를 나타내었다.

XT15(ANCOM)를 활용한 잎담배 에테르 추출물의 최적 분석방법 구명(AOCS Method)

나승주,이정래,하아랑,김석재,서정규,Na, Seung-Ju,Lee, Jung-Lae,Ha, Ah-Rang,Kim, Suk-Jae,Seo, Jung-Kyu 한국연초학회 2010 한국연초학회지 Vol.32 No.2

The ether extract(EE) of leaf tobacco contains diverse compounds such as lipid, resinoid, paraffin hydrocarbons and pigments. Although the correlation of EE concentertion with leaf tobacco has not been established clearly, it is known that in some concentration range, EE concentration of leaf tobacco exerts good influence on the quality of tobacco. Recently, The American Oil Chemist's Society introduced new method(Am 5-04; AOCS, 2009) to determine EE concentration by AT15 extractor. This method is based on extraction with organic solvent at relatively high temperature and pressure, which significantly reduces the extraction time and ensures safety. The aim of this study is to optimize analytical condition of AOCS method for analyzing EE concentration of leaf tobacco. When sample pre-drying time and extraction time of XT15 were set to 3 hour and 30 minute and 30 minute respectively, EE concentration obtained from AOAC method. Statistical analysis(T-test) showed that there is no difference(P>0.05) between EE concentrations from two methods.

GCP로 개량된 복합지반의 지반강도 별 응력 및 침하거동

나승주(Seung-Ju Na),김대현(Daehyeon Kim),김경업(Gyeong-Eop Kim) 한국지반신소재학회 2017 한국지반신소재학회 논문집 Vol.16 No.3

쇄석다짐말뚝(GCP)은 수십 년 동안 사용되어 왔지만, 팽창, 전단파괴와 기타 현상과 같은 파괴가 여전히 발생하여 보다 정교한 연구가 필요한 실정이다. 본 연구에서는 선행연구 분석과 수치해석을 통해 치환율과 지반강도에 따른 응력 및 침하거동을 분석하고자 하였다. 이를 위해 유한요소해석 프로그램 ABAQUS를 사용하여 GCP로 개량된 복합지반을 모델링하여 지반강도와 치환율에 따라 복합지반의 응력과 침하를 분석하였다. GCP로 개량된 복합지반에 대하여 유한요소법을 이용한 수치해석을 실시하였으며, 치환율과 지반강도에 따른 복합지반의 응력관련계수와 침하저감계수의 관계를 분석하였다. 분석결과, 지반강도와 치환율이 증가할수록 깊이 별 평균 응력관련계수와 응력분담비는 증가하는 경향이 나타났다. 상부에서의 응력관련계수는 동일하게 증가하는 경향이 나타났지만, 응력분담비는 감소하였다. 따라서 상부층에서의 값은 다른 깊이에서의 값들과 다른 경향이 나타나므로 상부층에서의 측정된 값으로 복합지반 설계시 과오를 범할 수 있으니 주의가 필요하다. 또한 기존 침하저감계수식과 수치해석을 통한 침하저감계수와 비교·분석하였는데, 기존 식과 수치해석을 통하여 구한 값은 유사하게 나타났다. Although the Granular Compaction Pile (GCP) has been used for many decades, several failures still occur such as bulging, shear failure and other phenomena, indicating that more refined study is needed. The main objective of the study is to evaluate the stress concentration ratio for both area replacement ratio and shear strength of soil through literature review and numerical analysis. Numerical analysis using the finite element program ABAQUS has been performed for the composite ground with GCP. The behavior stress and settlement of composite ground have been analyzed for both the area replacement ratio (10~40%) and shear strength of soil (25~75 kPa). As a result of numerical analysis, as the soil strength and area replacement ratio increased, the average stree related coefficient and stress concentration ratio for depth tended to decrease, and stress related coefficient of upper layer tend to decrease equally, but the stress concentration ratio decreased. Therefore, tendency that the value in th upper layer differs from the value in other depths was displayed. Care should be taken because it is possible to make mistakes in designing the entire composite ground with the values measured in the upper layer. Also, the settlement reduction factor was compared with the existing equation and numerical analysis. And the value obatined from the existing equation and numerical analysis are similar.

GCP로 개량된 복합지반의 관통률에 따른 응력분담비

나승주(Seung-Ju Na),김대현(Daehyeon Kim),이익효(Ik-Hyo Lee),이강일(Kang-Il Lee) 한국지반신소재학회 2017 한국지반신소재학회 논문집 Vol.16 No.2

쇄석다짐말뚝(GCP)은 연약지반의 지지력 증가와 침하량 감소를 실현할 수 있어 연약지반 개량에 활발하게 사용되고 있다. 그리고 GCP 설계에 필요한 응력분담비는 치환율, 상재하중, 깊이, 관통률 등에 따라 달라진다. 그동안 많은 연구자들이 현장•실내 실험, 수치해석 연구를 통해 GCP로 개량된 복합지반의 응력분담비를 제안하였지만 명확하게 제시되지 못한 실정이다. 본 연구에서는 GCP공법의 합리적인 설계법 제안을 위한 기초연구로써, 유한요소해석프로그램인 ABAQUS 6.12-4를 이용하여 GCP로 개량된 복합지반을 모델링하여 치환율과 관통률에 따른 침하량과 응력분담비를 분석하고자 하였다, 그 결과, 최상부 지점을 제외한 다른 지점에서의 응력분담비의 값은 관통률 60%일 때 1.21~5.36, 관통률 80%일 때 1.19∼5.45, 관통률 100%일 때 2.16∼5.60 이었다. 이는 관통률과 치환율이 증가할수록 응력분담비의 값은 크게 증가함을 알 수 있다. Gravel compaction pile (GCP) is widely used as it increases the bearing capacity of soft ground and reduces the consolidation settlement. Stress concentration ratio for design is dependent on the area replacement, surcharge pressure, depth and penetration rate. However, a range of stress concentration ratio obtained through field, laboratory experiments and numerical analysis is large. But since the main objective of the study is to evaluate the stress concentration ratio and settlement for both area replacement ratio and penetration rate through numerical analysis. Numerical analysis using the finite element program ABAQUS 6.12-4 has been performed for the composite ground with GCP. As a result, the stress concentration ratio at the points except for the point of top is in the range of 1.21-5.36, 1.19-5.45, 2.16-5.60 for 60%, 80% and 100% penetration, respectively. In general, as the penetration rate and area replacement ratio increases, the stress concentration ratio tends to increase.

중학교 시기 학업성취도가 고등학교 시기 진로성숙도에 미치는 영향: 매개모형을 중심으로 한 혁신학교와 일반학교의 비교

오민아,나승주 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.12

목적 본 연구는 중학교 시기 학업성취도가 자기효능감과 학습에 대한 내적 동기를 매개로 고등학교 시기 진로성숙도에 어떤 영향을미치는지, 혁신학교와 일반학교에 대하여 분석하였다. 방법 이를 위하여 경기교육종단연구의 초등학교 4학년 패널 자료 중 5차년(2016)-7차년(2018) 자료를 활용하였다. 5차년도의학업성취도 변인, 6차년도의 자기효능감, 학습에 대한 내적 동기 변인, 7차년도의 진로성숙도 변인을 투입하여 SPSS MACRO 매개모형 분석을 수행하였다. 통제변인으로 성별, 가구소득, 가족형태, 부모애착 및 교육포부를 투입하였다. 결과 분석 결과, 진로자기이해의 경우 혁신학교에서는 중3 시기의 내적동기를, 일반학교에서는 자기효능감을 매개로 중2 시기의학업성취도가 고1 시기의 진로자기이해에 정적인 영향을 미쳤다. 진로계획성의 경우 혁신학교와 일반학교 모두 중2 시기의 학업성취도가 중3 시기의 자기효능감과 내적동기를 매개로 고1 시기의 진로계획성에 정적인 영향을 미쳤다. 내적동기의 매개효과는 혁신학교가 일반학교에 비하여 강하였다. 결론 분석 결과를 바탕으로 혁신학교의 교육효과성에 관하여 논의하였다. 특히 혁신학교에서의 학습경험이 학습의 내재적동기를통하여 진로성숙으로 이어진다는 것은 학업성취도만을 중시하는 교육풍토에서 혁신학교 정책이 새로운 교육적 대안이 될 수 있음이주요 논의점이다.