1-Nitroso-2-naphthol침전제를 사용한 연속흐름 선농축법에 의한 코발트의 정량분석

朴勇男,林甲洙 한국교원대학교 환경과학연구소 2000 환경연구논문집 Vol.- No.5

본 연구에서 유기 침전제를 사용하여 수용액중의 코발트를 on-line으로 연속 침전시켜 선농축하는 방법을 연구하였다. 침전제로 l-nitroso-2-naphthol을 사용하여 라인내에서 직접 침전시킨 뒤 MIBK(Methyl lsobuty Ketone)로 용해시켜 불꽃 원자흡수 분광기로 보내어 분석하였다. 최적조건을 구하고 농축 배율을 연구한 결과 대개 0.5ppm의 코발트 시료 1.0mL를 사용하였을 때 13배의 농축율을 얻었으며 시료처리 속도는 시간당 10개 정도 이었다. 부피를 10.0mL로 증가시키면 시료의 처리속도는 늦어지지만 농축비를 68배로 높일 수 있었다. 본 연구의 정확성을 알기 위해 합성된 준 표준 생체시료를 분석한 결과 4%의 상대 표준편차를 가지고 예상치에 근접하는 좋은 결과를 얻을 수 있었다. Trace amount of cobalt in water samples was preconcentrated continuously with an organic precipitant and determined by flame atomic absorption spectrometry. The flow injection technique was used to preconcentrate cobalt by on-line direct precipitation with 1-nitrsos-2-naphthol. The precipitation was dissolved with methyl isobutyl ketone (MIBK) and was sent to the flame. The optimum conditions for cobalt determination were determined and used to analyze Co samples. For 1.0 ml of sample, the enrichment factor was 13 and the sample throughput was about 10 per hour for 0.5 ppm Co solution. The enrichment factor was increased to 68 fold for 10.0mL. A semi-reference biological sample was prepared and analyzed. The result was in good agreement with the expected value with RSD of 4%.

한-중 간 RFS를 활용한 Sea&Air 복합운송 활성화에 관한 연구

박용남 ( Park Yong-nam ),김효진 ( Kim Hyojin ) 한국로지스틱스학회 2021 로지스틱스연구 Vol.29 No.3

In order to compare and analyze the competitiveness of the towed trailer method being promoted under the Land Combined Freight Vehicle Transportation Agreement and the Phase 1 Protocol with the RFS(Road Feeder Service) method being promoted by the government in the second half of 2021. Based on the volume of Sea&Air shipments between Korea and China over the past 10 years, the analysis of portfolio and ARIMA(Automatic Recursive Movement Average) models, and competitiveness analysis of the existing towed trailer method and RFS (Road Feeder Service, Combined Integrated Transportation) method were conducted. As a result of the study, Shidao Port and Weihai Port in China are found to be “Star Performers” with high market growth and relative market share, and the future transshipment cargo from China will increase from about 42,239 tons in 2021 to about 50,996 tons in 2025. Furthermore, compared to the existing towed trailer method, the RFS method reduces the time by 1 hour and 20 minutes, and costs 86 won per kg. In this situation, in order to activate multimodal transportation between Korea and China, the RFS method, which can shorten time and reduce costs compared to the existing towed trailer method, is actively introduced, and the connection between China’s Weihai Port and Shidao Port, which leads the growth of Sea&Air transshipment between Korea and China, should be strengthened. For this, it was found that it was imperative to gradually expand the target cargo and service areas of the RFS pilot project, as a balanced flow of import and export traffic between the Republic of Korea and China is very important.

등방성 난류에서 입자의 회전에 의한 분산 특성의 변화

박용남(Yongnam Park),이창훈(Changhoon Lee) 대한기계학회 2010 大韓機械學會論文集B Vol.34 No.7

등방성 난류에서 부유된 무거운 입자의 운동에서, 입자의 회전이 고려되었을 때 입자의 분산 특성에 나타난 변화를 살펴보았다. 입자의 회전을 고려함으로 인해 추가로 고려되는 양력은 그 크기가 작은 것으로 알려져 있고, 따라서 많은 연구에서 회전에 의한 효과는 무시되었다. 본 연구에서는 라그랑지안 기법으로 추적한 입자의 궤적에 미치는 양력의 크기를 속도와 가속도의 자기상관함수 및 확률밀도함수를 통해 정량적으로 살펴보았다. 속도 통계량에서는 양력에 의한 효과가 무시할 만 했으나, 가속도와 관련된 통계는 양력에 의한 영향이 있는 것으로 확인되었다. 난류의 가속도는 간헐성을 띄며, 간헐적인 특성은 난류 구조와 관련이 있다는 것이 알려져 있다. 따라서 입자에 작용하는 양력과 난류구조에 연관성이 있다는 유추가 가능하다. The effect of a particle’s spin is investigated numerically by taking into account the effect of lift forces originating due to difference between the rotations of a particle and of a fluid, such as the Saffman and Magnus lift forces. These lift forces have been ignored in many previous studies on particle-laden turbulence. The trajectory of the particles can be changed by the lift forces, resulting in a significant modification of the stochastic characteristics of heavy particles. Probability density functions and autocorrelations are evaluated from the velocity of solid particle, acceleration of solid particles, and acceleration of fluid at the position of solid particle. Changes in velocity statistics are negligible but statistics related with acceleration are affected by the rotation of particle. When a laden particle encounters coherent structures during its motion, the particle’s rotation might significantly affects the motion due to intermittently large fluid acceleration near the coherent structures.

초등 스포츠강사 협력 수업 양상 탐색

박용남,정도상 한국초등체육학회 2023 한국초등체육학회지 Vol.28 No.4

프라이버시 보호와 서비스 차별화를 위한 분류 가능한 익명성 제공

박용남 ( Yong-nam Park ),박희재 ( Hee-jae Park ),김종 ( Jong Kim ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.2

인터넷을 통한 서비스 제공은 법규 준수, 사용 권한 확인, 요금 부과, 차별화된 서비스 제공 등의 다양한 이유로 사용자 인증을 필요로 한다. 이러한 확인 과정은 인증만 되면 언제 어디서든 서비스를 이용할 수 있다는 측면에서 사용자에게도 편리성을 제공해 주지만 사용자의 서비스 이용 정보가 쉽게 기록되고 노출될 수 있는 문제점을 가지고 있다. 이를 해결하기 위한 방법으로 사용자 정보를 보호하면서도 불법적인 사용자에게 악용되지 않도록 하기 위해 추적 가능한 익명성을 보장하는 방안이 제안되고 있다. 하지만 이러한 방법으로는 법 준수를 위한 서비스 제한 규정이나 사용자 별 차별화를 필요로 하는 서비스 모델을 지원하지 못한다. 본 연구에서는 사용자에게는 익명성을 보장하고 적법한 절차를 통한 추후 구매자 추적이 가능하면서도 서비스 제공자에게는 서비스 그룹별로 차별화된 서비스 제공이 가능한 새로운 익명 생성 방안과 이를 적용하는 디지털 콘텐트 구매 프로토콜을 제안하고 있다.

유진 오닐의 초기 단막극에 나타난 꿈과 좌절

박용남(Yong-Nam Park) 한국영미어문학회 2005 영미어문학 Vol.- No.75

Some critics characterize all of O'Neill's plays as a journey, a quest, and poet's pilgrimage. The majority of O'Neill's characters are trying to escape from agonizing realities and make a quest. Especially characters of O'Neill's early one-act plays tend to have their dreams and fail to accomplish them. This thesis intends to survey their dreams and frustrations found in his early one-act plays. For O'Neill, life is an illusion which can't be reconciled with reality. Even though O'Neill's characters are defeated and frustrated in life, he stresses the hope of life continuously. O'Neill once said, "Without hope, there is no life, and so we go on pursuing our dream to the last gasp, convinced in spite of our reason that there must be some spiritual meaning behind our hope, which in some greener land will prove it was all justified."Therefore, O'Neill's characters are pursuing their dreams, 'the green world' beyond the present reality. In the early one-act plays, O'Neill depicts the lives of seafarers, which are gloomy and pessimistic. Their dreams are frustrated by ruthless fate which he called "the forces behind life."Sailors want to go back home and settle down at the farm with their family; however nobody can go back home. Their farmland and home can represent their lost Eden and peace. The wrecked passengers are drowned in spite of their desperate hope for being rescued. Mammy has a vain dream about Dreamy, the grandson, because he is a rogue who killed a whiteman and wanted by the police. Captain Bartlet wants to find the hidden treasures, but he dies with an insane illusion of Mary Allen's coming back home. In Rope, father wants his prodigal son to repent and find his presents, the gold through hanging the rope. But his son doesn't know about that. The characters of O'Neill's early plays try to reach unattainable dreams only to fail. Finally, however, O'Neill takes an optimistic attitude toward life and accepts the ugly reality as it is. In his last autobiographical plays, he ceases the struggles with life and tries to reconcile with it. He shows us that life is valuable and meaningful even though it has many scars. That is the reason why so many people today call him a great dramatist and love him.

학생선수 재능기부 사례 분석을 통한 지역사회 청소년 발달(CYD) 과제 탐색

박용남(Park, Yong-Nam),정도상(Jeong, Do-Sang) 한국초등체육학회 2021 한국초등체육학회지 Vol.27 No.4

본 연구의 목적은 학생선수 재능기부 사례 분석으로 재능기부 프로그램의 효과 및 한계점을 밝히고, 스포츠를 통한지역사회 청소년 발달의 현실적 과제를 탐색하는 것이다. 연구참여자는 경남 J시 G초교에서 약 3년간 운영된 학생재능기부 프로그램에 참여한 일반학생(4명), 학생선수(3명), 교사(1명), 지도자(2명)이며, 주된 자료수집 방법은 심층면담과 비참여관찰이었다. 수집된 자료는 질적 자료분석을 위한 포괄적 분석 절차(이동성, 김영천, 2020)에 따라충실히 분석되었다. 연구 결과, 학생선수 재능기부 프로그램은 학교와 지역의 연계, 학교-생활-전문체육의 연계를강화하는 긍정적 효과가 있었다. 그러나 지나치게 높은 교사 의존도와 비체계적인 일방적 봉사라는 재능기부의 한계점을 함께 드러내었다. 이러한 효과와 한계점을 고려하여, 연구진은 스포츠를 통한 지역사회 청소년 발달 과제를다음과 같이 제시하였다. 첫째, 공공스포츠클럽의 한 형태로 일반학생, 학생선수가 함께 하는 지역 거점 학교스포츠클럽의 운영이 활성화되어야 한다. 둘째, 거점 학교스포츠클럽 생성 및 운영 과정에서 지역 단위학교체육진흥회가중추적인 역할을 해야 한다. 끝으로 시도교육청의 지역 거점 학교스포츠클럽 전환과 대응 연구의 필요성, 거버넌스참여주체별 역할 정립, 거점 학교스포츠클럽 운영에 있어 학생선수의 재능기부 역할 부여를 제언하였다. The purpose of this study is to analyze a case of student-athletesʼ talent donation program(STDP), explore its effects and limitations, and provide implications for community youth development(CYD) through sport. The research participants were students(4 people), student athletes(3), a teacher, and coaches(2) who participated in the STDP operated for about 3 years at G Elementary School in J city, Gyeongnam. The data had been collected mainly based on in-depth interview and focus group interviews. The collected data were analyzed according to the comprehensive analysis procedure for qualitative data analysis(Lee & Kim, 2020). As a result of this study, first, STDP produced a positive effect of strengthening the connection with the school and the local community. Second, STDP revealed the effect of linking school-life-elite sports. Third, however, STDP revealed limitations such as excessive dependence on a teacher and unsystematic and one-sided service. The results of this study suggest that, as a form of public sports club, the operation of local base school sports clubs with general students and student athletes should be activated, and the local school sports promotion association should play a pivotal role in this process for CYD thorugh sport. We requested to convert the school sports department into a school sports club for the local education office, and we believe that related research is needed. In addition, it was d that the role of each participating institutions in governance should be established. And that the role of talent donation should be given to student athletes in the operation of local base school sports clubs.

등방성 난류에서 가속도의 간헐적 특성

박용남(Yongnam Park),이창훈(Changhoon Lee) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11

It is well known that fluid acceleration in turbulence is highly intermittent. Source of the intermittency was found to be closely related to the rotational motion of coherent vertical structures. From the Poisson equation for pressure. ∇² P/ρ=Ω-ε/2ν, acceleration. which is mostly the negative of pressure gradient, can be expressed as a sum of acceleration-like terms. -∇(∇²)?¹Ω+∇(∇²)?¹(ε/2ν), each of which is named as α<SUP>Ω</SUP> and α<SUP>ε</SUP> They are acceleration due to rotational motion of eddy and acceleration due to rotational strain field. respectively. We investigated the statistical characteristics of those accelerations by using direct numerical simulation of isotropic turbulence. Flatness of acceleration is of order of 10 but flatness of α<SUP>Ω</SUP> and α<SUP>ε</SUP> are 3-5 which represents less intermittency in the range of R<SUB>λ</SUB>=47-130. Based on the cylinder vortex model. we show that probability density function of acceleration must have -5/3 slope and pdfs of α<SUP>Ω</SUP> and α<SUP>ε</SUP> must have -3 slope in log-log scale when the Reynolds number is infinite. Numerical and experimental results do not show clear slope since the Reynolds number is relatively low, but an asymptotic behavior is observed.

체형의 문화적 의미: Fat Pig

박용남 ( Yong-nam Park ) 서울대학교 미국학연구소 2015 미국학 Vol.38 No.2

This article aims to analyze the socio-cultural meanings of personal body-size in American culture represented in Neil LaBute’s acclaimed play, Fat Pig. According to ‘lookism,’ fat people are subject to social prejudices, such as “idle,” “irresponsible,” “incompetent,” even “abnormal,” which is derogative. Because of this, many people, especially women are oppressed by the ‘cult of thinness’ in American ‘fat-phobic’ society. This ‘fat-shame’ culture based on false ‘beauty myth’ functions as a modern oppression against individuals. In Fat Pig, Tom is tormented by his peers just because he is dating with an obese woman, Helen. Although Tom doesn’t agree with their prejudices against Helen and he dearly loves her, he cannot but to leave her at a beach party eventually. He is not strong enough to fight against the powerful social prejudice, ‘lookism.’ Fat Pig shows ‘lookism’ in American culture can be very oppressive and even violent against innocent individuals.

학생선수 재능기부 사례 분석을 통한 지역사회 청소년 발달(CYD) 과제 탐색

박용남,정도상 한국초등체육학회 2022 한국초등체육학회지 Vol.27 No.4

본 연구의 목적은 학생선수 재능기부 사례 분석으로 재능기부 프로그램의 효과 및 한계점을 밝히고, 스포츠를 통한 지역사회 청소년 발달의 현실적 과제를 탐색하는 것이다. 연구참여자는 경남 J시 G초교에서 약 3년간 운영된 학생 재능기부 프로그램에 참여한 일반학생(4명), 학생선수(3명), 교사(1명), 지도자(2명)이며, 주된 자료수집 방법은 심층 면담과 비참여관찰이었다. 수집된 자료는 질적 자료분석을 위한 포괄적 분석 절차(이동성, 김영천, 2020)에 따라 충실히 분석되었다. 연구 결과, 학생선수 재능기부 프로그램은 학교와 지역의 연계, 학교-생활-전문체육의 연계를 강화하는 긍정적 효과가 있었다. 그러나 지나치게 높은 교사 의존도와 비체계적인 일방적 봉사라는 재능기부의 한 계점을 함께 드러내었다. 이러한 효과와 한계점을 고려하여, 연구진은 스포츠를 통한 지역사회 청소년 발달 과제를 다음과 같이 제시하였다. 첫째, 공공스포츠클럽의 한 형태로 일반학생, 학생선수가 함께 하는 지역 거점 학교스포츠 클럽의 운영이 활성화되어야 한다. 둘째, 거점 학교스포츠클럽 생성 및 운영 과정에서 지역 단위학교체육진흥회가 중추적인 역할을 해야 한다. 끝으로 시도교육청의 지역 거점 학교스포츠클럽 전환과 대응 연구의 필요성, 거버넌스 참여주체별 역할 정립, 거점 학교스포츠클럽 운영에 있어 학생선수의 재능기부 역할 부여를 제언하였다. The purpose of this study is to analyze a case of student-athletes’ talent donation program(STDP), explore its effects and limitations, and provide implications for community youth development(CYD) through sport. The research participants were students(4 people), student athletes(3), a teacher, and coaches(2) who participated in the STDP operated for about 3 years at G Elementary School in J city, Gyeongnam. The data had been collected mainly based on in-depth interview and focus group interviews. The collected data were analyzed according to the comprehensive analysis procedure for qualitative data analysis(Lee & Kim, 2020). As a result of this study, first, STDP produced a positive effect of strengthening the connection with the school and the local community. Second, STDP revealed the effect of linking school-life-elite sports. Third, however, STDP revealed limitations such as excessive dependence on a teacher and unsystematic and one-sided service. The results of this study suggest that, as a form of public sports club, the operation of local base school sports clubs with general students and student athletes should be activated, and the local school sports promotion association should play a pivotal role in this process for CYD thorugh sport. We requested to convert the school sports department into a school sports club for the local education office, and we believe that related research is needed. In addition, it was d that the role of each participating institutions in governance should be established. And that the role of talent donation should be given to student athletes in the operation of local base school sports clubs.