액상-환원법으로 초미세 Cu 분말 제조 시 반응 조건의 영향

박영민,진형호,김상렬,박홍채,윤석영,Park Young Min,Jin Hyeong Ho,Kim Sang Ryeol,Park Hong Chae,Yoon Seog Young 한국재료학회 2004 한국재료학회지 Vol.14 No.11

Ultra-fine Copper particles for a conductive paste in electric-electronic field were prepared using wet-reduction process with hydrazine hydrate ($N_{2}H_4{\cdot}H_{2}O$) as a reductor. The effect of reaction conditions such as the amount of dispersion ($Na_{4}O_{7}P_2{\cdot}10H_{2}O$) and reductor ($N_{2}H_4{\cdot}H_{2}O$) on the particle size and shape for the prepared Cu powders was investigated. The quantity of dispersion and reductor varied from 0 to 0.0025 M and from 5 to 40 ml at a reaction temperature of $70^{\circ}C$, respectively. The particle size, shape, and structure for the obtained Cu particles were characterized by means of XRD, SEM, TEM, EDS and TGA. The aggregation of Cu particles was reduced with relatively increasing of the amount of dispersion at fixed other reaction conditions. The smaller Cu particle with size of approximately 300nm was obtained from 0.032 M $CuSO_4$ with adding of 0.0025 M $Na_{4}O7P_2{\cdot}10H_{2}O$ and 40ml $N_{2}H_4{\cdot}H_{2}O$ at a reaction temperature of $70^{\circ}C$.

琴仙, 사회적 관계망과 정체성 찾기

박영민(Park, Young-min) 동양한문학회(구 부산한문학회) 2010 동양한문학연구 Vol.30 No.-

본 연구는 19세기 전반기의 황해도 해주 기생 琴仙의 한시를 통해 童妓가 자신을 둘러싼 사회적 관계망 속에서 어떻게 自我를 찾아 壯妓로 성장하여가는가를 밝혀보고자 한다. 금선은 황해주 해주에서 1800년에 태어나 13세 즈음부터 본격적으로 妓役을 수행한 기생이다. 금선의 한시는 필사본인 󰡔淸吟󰡕이라는 시권 속에 수록되어 있다. 금선은 한시를 통해 童妓에서 壯妓로 성장하는 기생의 成長談을 기생의 목소리로 직접 생생하게 들려준다. 현재까지 기생이 동기에서 장기로 성장하는 과정을 집중적으로 세밀하게 관찰할 수 있는 자료는 찾아보기 어려웠다. 금선의 한시에 대한 연구는 기생 작가, 여성 한시 작가의 새로운 발굴이라는 측면에서도 매우 중요한 의의가 있다. 그런데 학계에는 아직까지 금선의 한시에 대한 연구나 보고가 전혀 없는 실정이다. 금선의 성장담에서 가장 중요한 대상은 ‘客’이다. 실제, 기생의 일상은 관아에서의 妓役, 기방에서의 妓業이라는 공적, 사적 노동 현장에서 불특정 다수 남성들과의 교유로 이루어진다. 그런데 시집을 남긴 기생 가운데 자신이 상대하는 불특정 다수의 ‘객’을 호명하고 그들을 대상화하는 예는 거의 없었다. 반면 기생이 기역, 기방에서 ‘객’과 함께 하는 모습은 주로 남성들이 한시에서 묘사하였다. 그런데 남성 시인들이 묘사하는 기생의 모습은 남성들의 시선에 비친, 남성들이 보고자 하는 기생의 모습일 뿐이다. 그런데 금선은 자신의 일상에서 가장 핵심적인 사건이 불특정 다수 남성들 즉 ‘객’과의 교류임을 밝히고 한시에서 이 사건을 전면적으로 표현하였다. 금선은 노동의 주체로서 객체인 ‘客’을 향해 기역과 기업의 현장에 참여하는 자신이 무슨 일을 하고 있는지, 무엇을 원하는지를 분명하게 설명하고 보여준다. 금선과 객 사이에는 기생의 정체성이란 무엇인가에 대한 생각의 차이가 크게 존재한다. 금선은 때로는 객을 설득하고 때로는 저항하며 객과의 소통을 지향한다. 기생이 찾아가는 정체성의 끝에는 절개가 있었다. This paper focused on the widening our understanding of women literature in the 19th century. I introduced new documents, Keumsunsi(琴仙詩) and new woman writer, Keumsun(琴仙). She has not yet get known in women literature history. She was the important woman writer with Uncho(雲楚) in the late 19th century. This work is basically based on the understanding of her life and poems. Especially I paid attention to her social identity and daily thinking. And I emphasized that Keumsunsi was writen when Keumsun was very young. At that time Keumsun was 13 years old. I have characterized her daily life and thanking as a little gisaeng(童妓). I believe that analyzing the life and poems of Keumsun can contribute to understand the history of women literature in late Chosun dynasty. Especially she has acted as a little gisaeng in Haejoo in the early 19th century. I hope that this paper can contribute to understand the life and culture of gisaeng.

청폐사간탕(淸肺瀉肝湯)이 급성기 중풍환자의 동맥경직도 및 맥압에 미치는 영향

박영민,홍진우,신원준,정동원,김석민,배형섭,김영석,문상관,정우상,조기호,Park, Young-Min,Hong, Jin-Woo,Shin, Won-Jun,Jeong, Dong-Won,Kim, Seok-Min,Bae, Hyung-Sup,Kim, Young-Suk,Moon, Sang-Kwan,Jung, Woo-Sang,Cho, Ki-Hoo 대한한방내과학회 2006 대한한방내과학회지 Vol.27 No.2

Objectives : Arterial stiffness and pulse pressure are related to cardiovascular and cerebrovascular survival and longevity. This study is aimed at examining the effects of Chungpyesagan-tang on arterial stiffness and Pulse pressure in acute stroke Patients. Methods: The subject of this study was acute strike Patients within 1 week after ictus, with Cardio-ankle vascular index(CAVI) higher than 9.0. They were divided into two groups: A treatment group (n=44) and a control group(n=46). For two weeks, Chungpyesagan-tang was given to the former, other herbal medicines to the latter. used for stroke patients for the control group for 2 weeks. At the end of first and second week, CAVI, pulse Pressure, National Institute of Health stroke scale(NIHSS), Modified Barthel Index(MBI) were measured. Serum lipid Profile, aspartate transaminase(AST), alanine transaminase(ALT). blood urea nitrogen(BUN), creatinine were also measured at the end of the study. Results : After 2 weeks, CAVI and Pulse Pressure in Chungpyesagan-tane group were significantly tower than those in the control group(P<0.05). NIHSS and MBI were improved in both groups. But there was no significant difference between the treatment group and the control group in terms of the NIHSS and MBI. Conclusions : We suggest Chungpyesagan-tanghas desirable effects on arterial stiffness and Pulse Pressure of acute stroke patients. It can improve morbidity and mortality of patients on the basis of influencing vascular stiffness and increased pulse pressure.

염화물염의 염화물 함량과 양이온 종류에 따른 시멘트에 미치는 특성 분석

박영민,유주안,염우성,Young Min Park,Juan Yu,Woo Sung Yum 한국건설순환자원학회 2025 한국건설순환자원학회 논문집 Vol.13 No.3

본 연구에서는 국내 시멘트의 염화물 함량 기준을 수립하기 위한 기초연구로 다양한 종류의 양이온을 갖은 염화물(CaCl₂, NaCl, KCl)을 이용하여 시멘트 내 염화물 함량 범위를(850 ppm, 1,000 ppm, 1,500 ppm 및 2,000 ppm) 변화시켜가며 그에 따른 시멘트의 기초 물성 특성 변화를 연구하였다. 실험 결과 시멘트 내의 염화물 함량 증가는 시멘트의 기초 물성에 큰 영향을 주지 않는 것으로 판단되었으나, 다양한 변수나 콘크리트 단계에서의 추가적인 실험을 통해 다양한 관점에서 그 영향을 확인해야 될 것으로 판단된다. In this study, as a preliminary investigation for establishing chloride content standards in domestic cement, the effects of different chloride salts with various cations(CaCl₂, NaCl, KCl) were examined by varying the chloride content in cement (850 ppm, 1,000 ppm, 1,500 ppm, and 2,000 ppm). The results indicated that increasing the chloride content within the examined range did not significantly affect the basic properties of cement. However, it is considered necessary to verify these effects from multiple perspectives through additional experiments involving various parameters and at the concrete level.

동영상에서 물체의 추출과 배경영역의 상대적인 깊이 추정

박영민,장주석,Park Young-Min,Chang Chu-Seok 한국정보처리학회 2005 정보처리학회논문지B Vol.12 No.3

컴퓨터 비젼에 관한 고전적인 연구 주제들 중의 하나는 두 개 이상의 이미지로부터 3차원 형상을 재구성하는 3차원 변환에 관한 것이다. 본 논문은 단안 카메라로 촬영한 일반적인 2차원 영상물에서 능동적으로 움직이는 3차원 영상의 깊이 정보를 추출하는 문제를 다룬다. 연속하는 프레임들간의 영상 블록의 움직임을 평가하여 카메라의 회전과 배율효과를 보상하고 다음과 같은 두 개의 단계에 걸쳐 블록의 움직임을 추출한다. (i) 블록의 위치와 움직임을 이용하여 카메라의 이동과 초점거리에 대한 전역 파라메타를 계산한다. (ii) 전역 파라메타, 블록의 위치와 움직임을 이용하여 평균 영상 깊이에 대한 상대적인 블록의 깊이를 계산한다. 다양한 동영상을 대상으로 특이점인 경우와 그렇지 않은 경우를 실험하였다. 결과로 얻어지는 상대적인 깊이 정보와 객체는 인간이 판단하는 경우와 동일함을 보였다. One of the classic research problems in computer vision is that of stereo, i.e., the reconstruction of three dimensional shape from two or more images. This paper deals with the problem of extracting depth information of non-rigid dynamic 3D scenes from general 2D video sequences taken by monocular camera, such as movies, documentaries, and dramas. Depth of the blocks are extracted from the resultant block motions throughout following two steps: (i) calculation of global parameters concerned with camera translations and focal length using the locations of blocks and their motions, (ii) calculation of each block depth relative to average image depth using the global parameters and the location of the block and its motion, Both singular and non-singular cases are experimented with various video sequences. The resultant relative depths and ego-motion object shapes are virtually identical to human vision.

우울증 환자의 주간기분변동과 수면 양상

박영민,김린,서광윤,조숙행,강승걸,윤호경,Park, Young-Min,Kim, Leen,Suh, Kwang-Yoon,Joe, Sook-Haeng,Kang, Seung-Gul,Yoon, Ho-Kyung 대한수면의학회 2001 수면·정신생리 Vol.8 No.1

Object: Diurnal variation is included in the diagnostic criteria of the major depressive disorder, melancholic specifier. But there has been controversy over whether diurnal variation is an unique depressive symptoms or a symptom related to a change of sleep patterns, or that of another mechanism, when the previous studies are reviewed. We investigated the existence of diurnal variation according to the subtype of depression and whether diurnal variation is charateristic of melancholic depression or not. We also compared sleep variables according to the existence of diurnal variation. Method: We examined diurnal variation, sleep patterns, severity of depression using the Visual Analogue Mood Scale, Pittsburgh Sleep Quality Index, and Hamilton Depression Rating Scale. Patients recorded their mood state on the Visual Analogue Mood Scale twice a day, morning and evening, for diurnal variation. We divided depressive patients into two groups,-diurnal variation group and nondiurnal variation group,-and compared the mood and sleep variables using SPSS. Results: The frequency of diurnal variation is not significantly different among the subtypes of depression. Significant differences between the diurnal variation group and the nondiurnal variation group existed in middle insomnia and sleep time (p<0.05). In melancholic type, al significant difference between the diurnal variation group and the nondiurnal variation group was noticed in PSQI total, sleep latency, sleep disturbances, daytime dysfunction as well as middle insomnia and sleep time (p<0.05). Conclusions: Diurnal variation existed in other types of depression as well as melancholic type. The results showed that diurnal variation was not a specific symptom of melancholic type, and existence of diurnal variation might be related to sleep patterns.

피부과 외래환자에서 아토피피부염의 상대 빈도와 임상적 특징 및 검사 소견에 관한 연구

박영민,박홍진,김태윤,김정원 ( Young Min Park,Hong Jin Park,Tae Yoon Kim,Chung Won Kim ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.1

Background : Atopic dermatitis(AD) is a common disease, and population-based studies indicate that the frequency of AD has increased substantially during recent decades. However, there have been few studies on the hospital based relative frequency, and clinical and laborat,ory findings of AD in Korea. Objective : The presenl study was aimed to elucidate the relative frequency of AD on the outpatient base, and to investigate the clinical manifestations and immunological laboratory findings. Methods : Our study was designed by analysing outpatients with AD via physical examination, questionnaires and immunological investigations such as skin prick tests, Multi test CMI, and measurernent of eosinophil counts, total IgE, Derrnatophagoides pteronyssinus-specific IgE and eosinophil cationic protein(ECP). Results : The results were as follows : 1. The relat,ive frequen:y of AD on the hospital base in 1995-1996 was 8.6%. 2. The mean age of onset was 3.36 years. 57.3% of the patients had their onset of eczema by the age of 1 year, 65.5% by 2 years and 83% by 5 years. The most common site at the onset was the face followed by antecubital area, popliteal area, neck, and trunk. 3. The predilection site on physical examination were the face, neck, antecubit,al area, popliteal area and trunk in decreesing order. 4. Concomitant allergic rhinitis, keratoconjunctivitis and asthma were present in 2~3.4%, 14.1%, and 9.5% of patients with AD, respect.ively, whereas pure AD was present in 34.1%. 5. Family history of atopy was observed in 60.5% of AD patient.s. 6. The most frequent ninor fea~ture of AD was xerosis followed by perifollicular accentuation, allergic shiner, cheilitis, imitation allergy, palrnar hyperlinearity and molluscum cantagiosum. 7. Seasonal aggravation was found in 86.8% of patients with AD, especially in summer and winter, The rnost significant aggravating factors were wools followed by sweating, heating, dryness, excessive bat.hing and emotional stress. 8. Abnormal levels of .osinophils, total IgE and ECP were seen in 44.8%, 78.9% and 31.7% Of patients with AD, respec.ively. 9. Cell mediated immunty was decreased in 68.2% of patients with AD. 10. Positive reactivity( at least rnore than one alle~rgen) in the skin prick t,est was noted in 76% of pat,ients with AD and the most popular 8 allergens were D. pteronyssinus, D. farinae, cat fur, M4 mixed threshing dust., dog hair, mugwort pollen, H3 tree pollen and birch pollen. 11. The specific IgE aritibodies to D. pteronyssinus(>+1) were found in 72.3% of AD patients and correlated with the r esults of the skin prick test in 76%. Conclusion : The hospi al-based relative frequency of AD investigated in our study tends to be increased. As the clinica featu~res and laboratory findings of AD might be influenced by genetic, environrnental and psychological factors, the systernic evaluation of patients with AD will be needed (Kor J Dermatol 1997;35(1): 96-106)

CCPM을 이용한 건설사업 일정관리에 관한 연구

박영민,김수용,김기영,Park Young-Min,Kim Soo-Yong,Kim Ki-Young 한국건설관리학회 2004 건설관리 : 한국건설관리학회 학회지 Vol.5 No.5

Construction work varies with the project types. However, the success of all project types depends upon three conditions i.e. schedule, quality and cost. If these three conditions are fulfilled, then project said to be successful. In this paper, scheduling of a construction Project has been dealt with the application of CCPM method. CCPM has been introduced as a new theory in construction industry in 1997 at the United States, but its application is still insufficient in domestic field due to the absence of systematic study, A simulation has been conducted in a Bridge construction project to validate the possibility of CCPM in order to complement PERT/CPM in construction field. The result of study shows that the CCPM could be effective to reduce the project time duration than existing PERT/CPM technique.

실행분석을 통한 건설 프로젝트의 위험 요인 분석

박영민,김수용,김기영,Park Young-Min,Kim Soo-Yong,Kim Ki-Young 한국건설관리학회 2005 건설관리 : 한국건설관리학회 학회지 Vol.6 No.2

The major purpose of construction project management is to meet defined targets(scope or quality) on schedule and budget. Korean construction industry is suuering from lower productivity as compared to other industry sectors. 'Management software' of the construction industry has not been developed as fast as hardware in the aftermath of compressed economic development following the Korean War. Therefore, this study is intended to compare project execution at planning phase and at completion phase and identifying the risk factor of construction projects. Construction projects are more extensive and long-winding than any other projects and stake holders of complex interests are often involved. In this study, we identified and analyzed risk factor for domestic building construction projects and outputs of this study will be conducive to the improvement of construction management processes in the future.

개량 습윤제의 Streptococcus mutans 및 Candida albicans에 대한 영향

박영민,권혁권,여규영,이은숙,한만덕,정인식 ( Young Min Park,Hyuk Kon Kwon,Kue Young Yeo,Eun Sook Lee,Man Deuk Han,In Sik Chung ) 대한예방치과·구강보건학회 1997 대한구강보건학회지 Vol.21 No.2