경주권역으로의 대기오염물질 유입현황과 석조문화재에 미치는 영향

정종현,손병현,김현규,최원준,남철현,Jung, Jong-Hyeon,Shon, Byung-Hyun,Kim, Hyun-Gyu,Choi, Won-Joon,Nam, Chul-Hyun 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.5

In this study, we focused on the geographical and the meterological conditions, the atmospheric examination, the soil contents and compositions in order to establish cultural properties conservation plan in Gyeongju and its surroundings. Also, the transport route with environmental contaminants in Ulsan and Pohang was examined. The results could be summarized as follows ; Air pollutant and environmental contaminant was transported by two types of winds. One is induced by local winds, the other is induced by synoptic winds. Air contaminant transported from coastal regions to inland regions were associated with wind velocity. Gyeongju had good atmospheric conditions, i.e. $SO_2\;0.009{\sim}0.011ppm,\;CO\;0.6{\sim}0.8ppm,\;NO_2\;0.015{\sim}0.020ppm,\;O_3\;0.017{\sim}0.032ppm,\;PM_{10}\;46{\sim}62{\mu}g/m^3\;and\;Pb\;0.034{\sim}0.060{\mu}g/m^3$, which was below environmental air qualify standards and was little lower than those of Pohang and Ulsan. However, Ulsan and Pohang city are located on south-east coast and have many industrial facilities. Hence, air pollution problems become serious issues in Ulsan, Pohang, Busan, Daegu and other cities due to the emission of air pollutants from the various industrial facilities, incinerator and power plants, etc. The soil of Gyeongju had heavy metals conditions, i.e. $Cd\;0.01{\sim}0.08mg/kg,\;Cu\;N.D{\sim}2.39mg/kg,\;As\;N.D{\sim}0.07mg/kg,\;Hg\;N.D{\sim}0.15mg/kg,\;Pb\;0.49{\sim}1.39mg/kg,\;Cr^{+6}\;0.02{\sim}0.42mg/kg,\;Fe\;0.74{\sim}1.55mg/kg,\;Mn\;0.11{\sim}0.49mg/kg\;and\;Zn\;1.11{\sim}3.56mg/kg$. However, pH value of soil had range of $4.12{\sim}7.45$. The results showed that high pH concentration of soil could occur due to air pollution diffusion and environmental contaminant transport at Ulsan and Pohang city.

3,1운동 표상의 문화정치학: 해방기~대한민국 건국기의 3,1운동 표상을 중심으로

정종현 ( Jong Hyun Jung ) 한민족문화학회 2007 한민족문화연구 Vol.23 No.-

근대 한국민족의 탄생에 결정적인 영향을 준 사건인 3·1운동은 해방기 새로운 민족국가(nation) 형성에 대한 각 정파의 구상에 따라 다르게 담론화되었고, 그 표상 또한 상이하였다. 우파는 3·1운동을 민족저항사의 정점으로 하는 우파적 민족주의 내러티브를 주조하였다. 박종화의 민족 , 청춘승리 등은 그 좋은 사례인데, 이 소설들을 통해서 동학, 독립협회, 3·1운동, 광주학생운동으로 이어지는 민족저항사가 서사화된다. 이 과정에서 이승만을 중심으로 하는 단독정부 수립이라는 우파 민족주의 이데올로기가 정당화되고 있다. 한편 좌파는 안회남의 「농민의 비애」, 「폭풍의 역사」등의 소설을 통해서 확인할 수 있듯이, 3·1운동 의 주도세력을 농민, 노동자 등의 계급적 주체로 규정하며 `민족`이라는 동일자를 계급적 범주에 기반하여 재편하고 있다. 이는 이후 북한의 3·1운동 표상으로 이어진다. 1948년 대한민국이 건국되면서 단독정부 수립파가 만들었던 3·1운동 표상이 확대 재생산되면서 통일적인 표상체계를 갖추어 나가게 된다. 3·1정신은 계급과 성별을 떠난 민족 전체의 총의를 모았던 탈이념적 민족공동체의 정신으로 소환된다. 또한, 이전의 이데올로기적 균열을 봉합하는 기호로서 `유관순`이라는 `聖`처녀가 이 표상체계의 중심으로 대두한다. The March 1st Movement has been regarded as the largest national resistance movement during Japanese Imperialism which made a profound impact on the birth of modern Korean nationalism. In the era of liberation, a range of political factions made this movement into different discourses in which the representations also varied accordingly. That is, the two kinds of representations and narratives that came from the right wing groups and the left wing groups differed and further more competed against each other in the process of conceiving and constructing `we(nation-state)`. Rightists coined the narratives of rightist nationalism in which the March 1st Movement was represented as a peak point in the history of national resistance. Such narratives include novels like Park Jong-Hwa`s Min-Jok and Chung-Chun-Seung-Ri where a stream of Donghak, Dongniphyeophwoi, the March 1st movement and Gwangju haksang undong became a consistent narrative containing a whole history of national resistance movement. Especially it is notable that the rightist nationalism ideology was being justified in these narratives, by supporting the establishment of a separate government in South Korea by Lee Seung-Man. In contrast, the leftists tried to reorganize the term, `nation` based on the class category by identifying the leading forces of the March 1st Movement as the class subjects including farmers and working class. Their view points led to the representations of the movement in North Korea. Novels like Ahn Hee-Nam`s Sorrow of Farmers and History of Storms embodied such perspective. From 1948 when Daehanminguk was established, the representations that rightists, especially the group supporting a separate government, had composed, gradually developed into a steady and whole representational system. The spirit of the March 1st Movement in the first Constitution was summoned as the essence of a national community which was beyond any ideologies and stood for the whole nation regardless of classes and genders. In addition, Yu Gwan Soon, a saint virgin, emerged as a sign seaming former ideological fissures. In this regards, it is thought that the representations of the March 1st Movement can be key codes which make us decode the complicated contexts in which both Koreas constructed their separate societies depending on their own historical backgrounds.

해수와 대기오염물질이 석조문화재에 미치는 영향: 감은사지 삼층석탑을 중심으로

정종현,손병현,정민호,임헌호,김경원,김현규,Jung, Jong-Hyeon,Shon, Byung-Hyun,Jung, Min-Ho,Leem, Heon-Ho,Kim, Kyung-Won,Kim, Hyun-Gyu 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.4

The effect of seawater and air pollutants on the three-story stone pagodas on Gameunsa Temple Site have been studied in order to establish conservation basic plan. Also, an experimental study has been conducted to evaluate the effect of seawater salt and air pollutants on the weathering of granite. The results could be summarized as follows. Because the three-story stone pagodas on Gameunsa Temple Site are located outdoors, the external appearance has been largely deteriorated due to natural and artificial factors such as typhoon, wind, microorganisms, moisture, extreme change in temperature, air pollutants, and seawater, etc. When G.J fresh granite was dipped into the seawater, dissolution rate of three minerals (Mg, Ca, and K) are increased linearly until about 40 days and then increased abruptly. After seawater dipping experiments, the mineral compositions of the granite surface were lower then that of the G.J fresh granite but Poisson's ratio and absorption ratio were slightly increased. Therefore, from these results we can say that stone cultural properties could be weathered by seawater and air pollutants and it's considered being a meaningful experiment to study the conservation method of stone cultural properties from seawater.

열중합(熱重合) 레진의치상(義齒床) 수리시(修理時) 파절면(破折面)에 대한 처리방법(處理方法)이 수리 후 Transverse strength에 미치는 영향(影響)

정종현,Jung, Jong-Hyun 대한치과기공학회 1990 대한치과기공학회지 Vol.12 No.1

The purpose of this study was to investigate the effect of surface tretment on strength of denture repair as influenced by repair resin. Specimens were fabricated from VERTEX heat cured resin. Rectangular specimens($60\times10\times3mm$) were prepared according to the manufacturer's instruction for mixing and packing the resin into molds. Two methods of surface treatment were used and two methods of repair were also tested. The transverse strength of the resin was measured before repair and after repair by AUTOGRAPH testing machine. Six specimens of each category were prepared for testing for a total of 24 specimens. The mean value of the percent of recovery was calculated from the percent of recovery for six specimens. The results were as follows : 1. The mean value of the percent of recovery of each category makes a significant difference statistically one another(p<0.01), and "C" category, chloroform solvent-heat cured resin, has a better effect on repair srength than any other. 2. When no chloroform is used to treat the fractured surface there is no significant difference between the mean values of the percent of recovery influenced by the self curing resin and heat cured resin. But, when chloroform is used there is a significant difference between the two repair resins(p<0.01). 3. When self curing resin repair is used there is no significant difference between repair with and without the surface treatment of chloroform. But, when heat cured resin repair is used the use of chloroform treatment become significant statistically (p<0.01).

경주, 포항, 울산지역 보건.환경성 질환 위해 인자

정종현,최봉욱,문기내,석성자,김현규,손병현,Jung, Jong-Hyeon,Choi, Bong-Wook,Moon, Ki-Nai,Seok, Seong-Ja,Kim, Hyun-Gyu,Shon, Byung-Hyun 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.2

This study was undertaken in an attempt to provide scientific grounds in explaining the causes of environmental and respiratory diseases resulting from air pollutants in Gyeongju and its neighboring areas. In relation to heavy metals, lead (Pb) was $0.0135{\sim}0.1744\;{\mu}g/m^3$ and high in order of Pohang, Ulsan, and Gyeongju while nickel (Ni) was $0.0023{\sim}0.0115\;{\mu}g/m^3$. The concentrations of heavy metals in the investigated areas did not exceed the environmental standards or Guideline Value of Korea or other countries. However, it is considered necessary to apply intensive control to some heavy metals including cadmium (Cd) that show a relatively high level of hazard. Based on the responses to the survey, measured personal interest in environmental pollution and the basic knowledge of the causes of the respiratory diseases was higher in those with a family history of allergic reactions to metals and bronchial asthma. The incidence of allergic disease was higher in those who are currently in poor health state. In addition, the general knowledge of environmental pollutants was higher in those with higher educational level and those with a higher interest in environmental pollution. Personal interest in environmental pollution was higher in those with higher basic knowledge of environmental pollutants. Therefore, it is necessary to increase the awareness through better education and campaigns on environmental pollution.

데이터베이스와 XML에 기반한 건설프로젝트 기술문서 전자화

정종현,Jung Jong-Hyun 한국건설관리학회 2005 한국건설관리학회 논문집 Vol.6 No.4

This study describes the digitalization of technical documents of construction projects using database for storage and XML for exchange format on the web. First, for this purpose, the requirements for effective digitalization are identified. Second, the strategies for using database and XML are presented. These strategies include the way to store and search for the technical documents, to draw up the XML document for some parts of the technical documents, to arrange the components in their proper hierarchy, to manage the graphics and mathematical expressions in database and XML documents. Finally we discussed the validities of the results of this study by partial implementation for structural design sheets which has all the characteristics of technical documents. 본 연구의 목적은 건설프로젝트에 관련된 기술문서(technical document)를 효율적으로 저장하고 웹(web)을 통하여 신속하고 정확하게 교환할 수 있도록 전자화(digitalization)하는 방안을 제시하는 것이다. 이를 위해 본 연구에서는 먼저 전자화 측면을 고려하여 기술문서의 여러 특성을 분석하였고 이를 바탕으로 저장에는 데이터베이스(database)를, 웹을 통한 교환에는 XML을 적용하여 기술문서를 전자화할 수 있는 방안을 도출하였다. 여기에는 기술문서의 저장과 검색, 부분적인 XML문서의 작성, 기술문서에 적합한 구성항목과 구성체계 설정, 웹에서의 수식과 그래픽 처리 방안이 포함된다. 마지막에는 전형적인 기술문서 중의 하나인 구조계산서(structural design sheets)를 대상으로 하여 데이터베이스에 저장하기 위한 자료구조(data structure) 정의, 실제 XML문서의 작성 및 웹을 통한 교환 등을 부분적으로 구현하여 본 연구에서 제안한 데이터베이스와XML에 기반한 기술문서 전자화 방안의 적정성을 검토하였다.

초고층건물의 초기 구조설계를 위한 횡강성 증가율 예측

정종현,Jung, Jong-Hyun 한국전산구조공학회 2007 한국전산구조공학회논문집 Vol.20 No.4

The purpose of this study is to predict the ratios of increase in lateral stiffness for preliminary structural design of tall buildings. For this, the basic models of tall buildings with 60 stories are generated. The basic models have typical floor plan of Box or T type. And the factors for increase in lateral stiffness are selected as follows; the addition of outriggers, increase in material strength, and increase in member size of core walls, outrigger columns, and outrigger walls. Then these factors are applied to the basic models and their effects are investigated using the results of structural analysis. Finally, based on the investigation, the ratios of increase in lateral stiffness for preliminary structural design of tall buildings are proposed and applied to examples of tall building for verification of the ratios. 본 연구의 목적은 초고층건물의 횡강성 증가요인 효과를 분석하고 이를 바탕으로 초기 구조설계에서 활용할 수 있는 횡강성 증가율 예측값을 제시하는 것이다. 이를 위해서 먼저 Box형과 T형의 전형적인 평면을 갖는 60층의 초고층건물 기본모델을 생성하였다. 그리고 초고층건물의 횡강성 증가요인으로서 아웃리거의 추가, 재료강도의 증가, 코어 벽체 단면크기의 증가, 아웃리거 연결기둥 및 아웃리거 벽체의 단면크기 증가를 선정하였다. 다음에는 이 요인들을 기본모델에 적용하여 구조해석을 수행하고, 그 결과로부터 각 요인이 횡강성 증가에 미치는 영향과 상호관계 등을 분석하였다. 마지막으로, 이 분석결과를 바탕으로 초고층건물의 초기 구조설계를 위한 횡강성 증가요인별 강성증가율 예측값을 제안하였으며, 예제 초고층건물에 적용하여 그 타당성을 검토하였다.

치과용 Co-Cr 합금의 제성질에 미치는 Boron과 Silicon의 영향

정종현,Jung, Jong-Hyun 대한치과기공학회 1992 대한치과기공학회지 Vol.14 No.1

This paper aims to investigate the effect of B and Si upon the mechanical properties, microstructure and corrosion resistance of Co-Cr base alloy. Ten groups of alloy ingot ingot with various contents of B and Si were remelted by high frequency electrical induction furnace and cast into tensile specimen of ADA Specification No. 14 Tensile and hardness test were carried out by Amsler and Rockwell hardness tester(R-30N), respectively. The microstructures of specimen were observed by SEM. The results obtained are summarized as follows : 1. As B content is increased, tensile strength, yield strength and Rockwell hardness number(R-30N) are also increased significantly, while the elongation is decreased significantly. 2. As Si contect os increased, no significant chang in tensile strength is noticed, yield strength is slightly decreased, but Rockwell hardness number(R-30N) is moderately in creased, Elongation marks maxium value with 1% Si content while with more than 1% Si it is decreased. 3. As B content is increased corrosion resistance is decreased and is at best with 1.5% B content. Corrosion resistance is increased with the increase of Si content and the alloys with Si over 3.0% showed corrosion resistance. 4. As B content increased, precipitates are increased in number at grain boundaries. The grain size tends to become coarse with the increase of Si content. 5. Co rich-Cr alloy is present through matrix whereas at the grain boundaries Cr base precipitates are primarily formed.

치과주조용 Ti-20%Zr(-5%Cr)합금의 양극분극특성

정종현,한석윤,Jung, Jong-Hyun,Han, Sok-Yoon 대한치과기공학회 2004 대한치과기공학회지 Vol.26 No.1

Ti-20%Zr(-5%Cr) alloys not containing harmful Al and V were newly designed in order to reveal their possibility for dental casting and melted in an arc melting and casting furnace under Ar atmosphere. The corrosion resistance was studied by anodic polarization test. From the observation of anodic polarization behavior, it was found that the corrosion resistance was markedly increased by the addition of Cr. The corrosion resistance of Ti-20%Zr-5%Cr alloy was superior to that in Ti-6%Al-4%V alloy but almost similar to that in CP Ti using in market place today.

울산지역 학교의 실내공기질 평가

정종현,서보순,주동진,박만철,손병현,피영규,Jung, Jong-Hyeon,Seo, Bo-Sun,Ju, Dong-Jin,Park, Man-Chul,Shon, Byung-Hyun,Phee, Young-Gyu 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.6

The purpose of this study was to investigate the concentration of indoor air pollutants at 63 elementary schools, 41 middle schools and 51 high schools in Ulsan from the beginning of May to the end of December, 2008. To assess the indoor air quality of the various classrooms, the 8 indoor air pollutants such as $CO_2$, CO, $NO_2$, $O_3$, $PM_{10}$, TVOCs, HCHO and TBC were measured and analyzed. The mean concentrations of $PM_{10}$ and TBC in the elementary schools were significantly higher than those of middle and high schools (p < 0.01). For the HCHO, the multi-use practice rooms showed an average 1.5 times higher than general classrooms. In schools located in urban areas, the concentrations of CO, $O_3$, $PM_{10}$, HCHO and TBC were lower than in the vicinity of industrial complexes. The exceeding rate of the school air quality maintenance limits in the 6 air pollutants by law were 6.7%, 3.5%, 1.7%, 18.2%, 13.0% and 18.4% for $CO_2$, $NO_2$, $O_3$, $PM_{10}$, HCHO and TBC, respectively. Based on these results $PM_{10}$ and TBC have to be in the order of priority of need to improve the classroom air quality in elementary school of Ulsan.