철강산업 근로자들의 자각증상에 의한 피로도 조사

박종안 최신의학사 1981 最新醫學 Vol.24 No.2

石油煖爐에서 放出되는 acidic emissions에 關한 硏究

박종안 순천향대학교 1991 논문집 Vol.14 No.3

본 연구로 연통이 없는 석유난로는 호흡성의 미세입자, sulfate 및 acidic aerosol 등의 실내 공기오염원이 되고 있음이 밝혀졌다. 따라서 석유난로를 사용하는 가정에서의 가족들은 고농도의 미세입자, sulfate및 acidic aerosol 등에 폭로될 수 있으며, 동시에 석유난로에서 나오는 SO₂, NO₂, CO 및 CO₂등에 폭로될수 있다. 이들 가정내에서의 sulfate와 acidic aerosol의 농도는 실외보다 높으며 가족들은 이와 같은 생활환경에서 장기간 폭로되게 된다. 석유난로를 사용하게 될 경우 acidic aerosol의 폭로 농도와 시간은 건강한 사람과 예민한 사람모두에 있어 건강의 위협이 될 수 있다. Chamber studies were conducted on four unvented kerosene space heaters to assess acidic emissions. The results of the chamber studies are as follows: 1. Unvented kerosene space heaters are a potential sources of respirable suspended particles, sulfate and acidic aerosol indoors. 2. Individuals in residences where kerosene space heaters are used may be exposed to high concentrations of fine particles, sulfate and acidic aerosol 3. Sulfate and acidic aerosol concentrations in these homes are likely to be considerably higher than those observed outdoors and residences are likely to be exposed for substantially longer times. 4. The concentration and length of exposure to acidic aerosol resulting from kerosene heater use may pose a health risk to both healthy and sensitive individuals exposed.

Mobile Object Retrieval System Based on Multimedia Contents

박종안,안영은,강성관,김국정 한국정보기술학회 2014 JOURNAL OF ADVANCED INFORMATION TECHNOLOGY AND CON Vol.4 No.1

In line with the increasing demands for searching and authentication technology of unknown objects based on multimedia contents, the demands in society for the technology in other areas such as missing child, patients with dementia, the disabled, wanted criminals, and ID authentication are also rapidly increasing. In this regard, this study aims to present general information of mobile object retrieval system based on multimedia contents for searching and authentication of objects from biometric data that consist of various contents including face images and finger prints by means of mobile devices regardless of realtime communication. This study also suggests the future direction of the realtime object searching and authentication technology in examination of its current problems.

휴대폰 착신 알림을 위한 모바일 디스플레이 시스템 설계

박종안,천종훈,강성관,Park, Jong-An,Chun, Jong-Hun,Kang, Sung-Kwan 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.6

휴대폰을 소지할 수 없는 제한된 공간에서 휴대폰 착신 여부를 표시하는 휴대폰 착신 디스플레이 시스템을 설계하여 제작하였고 그 타당성을 확인하였다. 개발된 휴대폰 착신 알리미 시스템은 위탁 공간에 보관된 휴대폰의 착신 여부를 감지하여 블루투스를 통해 데이터를 송출하는 휴대폰 데이터 송신 애플리케이션과 데이터 송수신 범위를 확장하기 위한 RF 데이터 중계기 그리고 미소지자에게 휴대폰 착신 상태를 알려주는 착신 데이터 디스플레이 장치로 구성된다. 제안된 시스템은 구현이 간단하고 저가 설치가 가능하여 시스템 설치 측면에서 경제성을 가질 뿐만 아니라 시스템을 이용하는 일반 휴대폰 사용자에게도 앱 스토어에 올려놓은 알리미 애플리케이션을 다운로드하여 활용하게 함으로써 경제성과 함께 어느 곳에서나 편리하게 휴대폰 착신 상태를 확인할 수 있는 편리성도 갖게 된다. In this paper, we developed a phone call display system or "alimi" for displaying the received phone data at limited space that can not carry a mobile phone and and its validity was confirmed. It consists of a data communication application transmitting the phone data via bluetooth, a RF data repeater to extend the range of data communication, and a display system part for displaying the received phone data to the phone user. It has economy in terms of system installation because the implementation of the proposed system is simple and low cost installation is possible. As ordinary mobile phones users using the system can easily utilize it by downloading the application on the app. store, it has economy and convenience checking whether a call is received.

一部 樂器의 演奏音에 의한 暴露歷이 聽力에 미치는 影響

박종안,장봉기,이종화,안규동,이영세 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1

This study was carried out to evaluate the effect of playing musical instruments on hearing threshold level from May to October, in 1997. Pure tone audiometric tests was provided to musical instruments playing group of total 117 subjects(Samullnori; 35, military band; 25, symphony orchestra; 46, piano; 11), and reference group of total 7,477 subjects, selected after excluding workers with history of ear disease, of ototoxic drug administration, of noise induced hearing loss at workplace in Pohang industrial area. In addition, noise exposure levels of musical instrument players were assessed by noise dosimetry(exchange rate; 5dB, threshold level; 80dB, criterion level; 90dB), and produced age-adjusted hearing threshold level(=hearing threshold level of musical instrument player - hearing threshold level in same age of normal population group). The age-adjusted hearing threshold levels were analyzed by musician's career. The results were as follows; 1. The hearing threshold level of reference group was revealed more increased as within 4.98dB to 6.89dB at 1 KHz and within 5.26dB to 14.46dB at 4 KHz by ages than "the Standard of Age-adjusted Hearing Loss by Frequency(OSHA)" used for special health examination in the Ministry of Labour. 2. Equivalent continuous sound exposure level (Leq) by the group of instrumentalist was as following; within 104.95 to 112.62dB in samullnori, the highest, within 100.18 to 103.49dB in military band, within 77.00 to 82.74dB in symphony orchestra and 81.54dB in piano, the lowest. Playing maximum sound level by each musical instrument was as following; 122.8dB in Kkwaenggwari, the highest, 122.7dB in Changgo, 121.8dB in Alto saxophone, 115.5dB in Trumpet, 119.2dB in Horn, 112.8dB in Pungmul Buk and Ching, 112.5dB in Clarinet. 3. Average age-adjusted hearing threshold levels of instrumentalists were -0.65±6.38dB in left ear, -0.92±6.59dB in right ear at 1 KHz, and -1.14±12.88dB in left ear, -1.53±12.77dB at 4 KHz, which were better than normal, but the average age-adjusted hearing threshold levels of Samullnori players were 1.23±5.22dB in left ear, 1.94±6.91dB in right ear at 1KHz, and 8.40±15.75dB in left ear. 7.13±14.97dB in right ear at 4KHz, which were worse than normal. 4. Hearing threshold level in Samullnori players was increased with their career at 4 KHz, especially it increased rapidly when the musicians had played over 10years. It showed that there was a significant relationship between hearing threshold level and the career (P<0.01).

벤처.중소기업가의 전략적 직관에 의한 의사결정 모형에 대한 사례연구

박종안,김영수,도만승,Park, Jong An,Kim, Young Su,Do, Man Seung 한국벤처창업학회 2014 벤처창업연구 Vol.9 No.1

본 논문은 경영환경에 대한 불확실성 증대, 데이터 없는 최초 상황 발생, 합리적 의사결정이 불가능할 경우 등 기업환경이 변화할 때, 벤처 중소기업 경영자들은 의사결정 시 직관을 어떻게 활용하는가에 관한 사례연구다. 논문은 문헌 연구와 벤처 중소기업 경영자 16명을 심층 인터뷰하여 자료를 수집하였고, Klein, G, 의 "포괄적(generic) 멘탈 시뮬레이션 모델"로 분석하였다. 연구에 사용된 직관은 본인의 경험을 사용하는 전문가(expert) 직관과 타인의 경험도 활용하는 전략적(strategic) 직관으로 분류하였다. 사례연구 결과 경영자들은 전문가 직관과 전략적 직관을 다르게 활용하고 있었다. 전문가 직관의 특징은 별 노력 없이도 빠르게 작동하는데, 반해 전략적 직관은 시간이 많이 소요된다. 또 다른 특징은 전문가적 직관은 이미 발생된 일에 대한 의사결정에 많이 사용되고, 전략적 직관은 미래형 의사결정에 많이 활용되었다. 전략적 직관의 프로세스는 (1)전략적 관심단계 (2)매개물 발견단계 (3)1차 멘탈 시뮬레이션 단계 (4)핵심 매개변수 띄우기 단계, (4)2차 멘탈 시뮬레이션 단계 (5)내부 평가 단계 (6) 의사결정 단계를 거친다. 위에 단계를 모델링하여 벤처 중소기업 경영자들의 "전략적 직관에 의한 의사결정 모형(Strategic intuition decision-making model)"을 도출하였다. 사례분석 결과 나타난 중요한 결과는 첫째, 성공하는 의사결정 시 성공과 실패의 중요한 차이는 의사결정 프로세스 중 "2차 멘탈 시뮬레이션"에서 결정되었고, 둘째, 전문가 직관이 전략적 직관보다 많아질수록 경영의 어려움에 봉착하였으며. 셋째, 전략적 직관은 학습이 가능하다. A Case Study on Venture and Small-Business Executives' Use of Strategic Intuition in the Decision Making Process This paper is a case study on how Venture and Small-Business Executives managers can take advantage of their intuitions in situations where the business environment is increasingly uncertain, a novel situation occurs without any data to reflect on, when rational decision-making is not possible, and when the business environment changes. The case study is based on a literature review, in-depth interviews with 16 business managers, and an analysis of Klein, G's (1998) "Generic Mental Simulation Model." The "intuition" discussed in this analysis is classified into two types of intuition: the Expert Intuition which is based on one's own experiences, and Strategic Intuition which is based on the experience of others. Case study strategic management intuition and intuition, the experts were utilized differently. Features of professional intuition to work quickly without any effort by, while the strategic intuition, is time-consuming. Another feature that has already occurred, one expert intuition in decision-making about the widely used strategic intuition was used a lot in future decision-making. The case study results revealed that managers were using expert intuition and strategic intuition differentially. More specifically, Expert Intuition was activated effortlessly, while strategic intuition required more time. Also, expert intuition was used mainly for making judgments about events that have already happened, while strategic intuition was used more often for judgments regarding events in the future. The process of strategic intuition involved (1) Strategic concerns, (2) the discovery of medium, (3) Primary mental simulation, (4) The offsetting of key parameters, (5) secondary mental simulation, and (6) the decision making process. These steps were used to develop the "Strategic Intuition Decision-making Model" for Venture and Small-Business Executives. The case study results further showed that firstly, the success of decision-making was determined in the "secondary mental simulation' stage, and secondly, that more difficulty in management was encountered when expert intuition was used more than strategic intuition and lastly strategic intuition is possible to be educated.

低溫灰化法에 의한 중금속 분석

박종안 순천향대학교 1986 논문집 Vol.9 No.2

This research was conducted to investigate the optimal conditions of low temperature ashing apparatus, modified electric furnace, to solve the difficult problems frequently occurring in the analysis of heavy metals in various samples. The results were as follows: 1. Analyzed values of the samples pre-treated by low temperature ashing apparatus obtained more accurate results than those obtained by wet analytical method. The coefficient of variation of analyzed values were 2.7% by low temperature ashing method and 7.4% by wet analytical method. 2. The optimal electric power(W) was 200-300 and oxygen flow rate(ml/min) was about one-third of each maximum electric power in values. 3. Ashing time was shortest at the optimal conditions and it took longer with the increased amount of samples. 4. Low temperature ashing method gave better recovery yield rate for Cd, Cu, Pb or Zn than muffle furnace ashing method. Muffle furnace ashing method using high temperature of 550℃ gave the yield as low as below 50% for Zn, Pb or Cd. It was suggested that the latter be not adequate for analysis of Zn, Pb or Cd, in the samples.

도시기본계획상 주요 계획지표 설정의 적절성에 관한 연구: 계획인구, 시가화예정용지, 도시공간구조 설정을 중심으로

박종안,이강엽,채병선 국토연구원 2011 국토연구 Vol.68 No.-

A comprehensive city plan planned in the past years of rapid urbanization, based on increase in population, had established and used land use plan and urban spatial structure. However, as the population growth has entered a phase of stagnation and mobility among regions has also stabilized, such plan in the past needs its change. In this study, characteristics of projected population, planned urbanized area and urban spatial structure in the 82 comprehensive city plans are investigated in terms of, regions, population size, population growth trend, city types and groups. The results show that the projected population of 82 cities is excessively set up, which led to an excessive set-up of planned urbanized area and a consequent low density of population. Besides, a reckless establishment of central place caused a distortion in urban spatial structure. This will be likely to bring about insufficient use of land, increase in costs for infrastructure and city management. This study suggests a planning fitted for the characteristics of each city, plans centered on metropolitan area. 과거 급속한 도시화시기에 마련된 도시기본계획은 인구증가를 전제로 하여 토지이용계획, 도시공간구조 등을 수립하는 방식으로 운용되어 왔다. 하지만 인구성장이 정체되고 지역 간 인구이동 역시 안정화되어가면서, 인구증가를 전제로 한 계획 수립방식에 대한 재고의 필요성이 증대되고 있다. 본 연구에서는 82개 도시기본계획상 계획인구 설정치와 시가화예정용지, 도시공간구조 설정과의 관계를 지역별, 인구규모별, 인구성장추이별, 도시형태별, 군집별로 분석하여 특성을 고찰하였다. 그 결과 82개 도시의 계획인구가 과다 설정되고 있었으며, 이는 시가화예정용지의 과다설정과 이로 인한 밀도 저하로 이어지고 있었다. 또한 무분별한 중심지 설정으로 도시공간구조 왜곡현상이 나타나고 있었다. 이로 인해 효율적인 토지이용의 저해, 기반시설 및 도시관리 비용의 증대 등의 문제점 발생이 예상되고 있으며, 본 연구에서는 각 도시별 특성에 맞는 계획수립지침의 마련 및 운용, 광역자치단체를 기본으로 하는 계획의 수립 등을 대안으로 제시하였다.

Cornell Medical Index에 의한 철강산업 근로자들의 건강실태

朴鍾安 최신의학사 1981 最新醫學 Vol.24 No.2

디지탈 데시벨 메타의 새로운 設計法

朴鍾安 조선대학교 동력자원연구소 1983 動力資源硏究所誌 Vol.5 No.1

The principle of a digital decibel meter is analyzed, and a new design method is developed. The decaying exponential function signal is fed into the two comparators which detect two preselected voltages, and the output of the comparatore are converted into a pulse, The duration of the pulse is directly proportional to the time constant of the signal, By means of the new design, H.F clock pulse from the clock oscillator are counted for the period. This method represent an easy and effective way, and can be implemented with inexpensive compoments without sacrifice of accuracy, stability, and operating range.