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김종찬 한국물리학회 2006 새물리 Vol.53 No.2
A brief introduction to the s- and the r-processes for the formation of heavy elements in stars is given, followed by a few experimental suggestions, in order to promote nuclear astrophysics programs in Korea. 국내 천체핵물리학의 활성을 위하여 천체핵합성의 s-process, r-process를 개관하고 이에 따른 국내 연구의 전개 방안을 모색하였다.
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Al-Si/$\{SiC}_{p}$ 복합재료 용탕에서 SiC 입자의 침강
김종찬,권혁무,Kim, Jong-Chan,Gwon, Hyeok-Mu 한국재료학회 1997 한국재료학회지 Vol.7 No.2
Remelting of $A-Si/SiC_{p}$ composites followed by isothermal holding and solidification, leads ro the settling of Sic particles to the bottom of the mold. With the isothermal holding time for molten $A-Si/SiC_{p}$ composites. the particle free zone increases rapidly up to approximately first 30 minutes of the holding time. Experimental resulls of the particle settling confirm that the larger SIC particles sink faster tlun the sniiller particles. An increase in volume fraction of Sic particles decreases the setrling velocity of the particles. AI-xSi/ySiC( x:6~18wt%, y: 3~9wt%, SiC 입자크기: $10~28{\mu}m$) 복합재료를 재용해한 후 항온 유지하고 응고 시킬때 SiC 입자가 몰드의 하부로 침강하는 현상을 계통적으로 조사하였다. AI-Si/SiC 복합재료 용탕을 항온으로 유지하면 입자가 없는 지역은 유지시간이 약 처음 30분 동안 빠르게 증가한다. SiC 입자가 크기가 클수록 SiC입자의 크기가 클수록 SiC입자의 침강속도가 빠르다. 또한 복합재료중 철가한 SiC 입자의 부피분율이 증가하면 입자의 침강속도는 감소한다.
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Fabrication and Characterization of Strain Gauge Integrated Polymeric Diaphragm Pressure Sensors
김종찬,이정철,최범규 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.
We demonstrated a simple fabrication of polymeric diaphragm pressure sensors by embedding a commercial thin-film strain gauge in a polymeric diaphragm. Two different polymer materials, polydimethylsiloxane (PDMS) and polyethylene terephthalate (PET),were employed for fabrication. Performance of pressure sensors fabricated with two different polymers including sensitivity, linearity,and long-term stability was thoroughly compared using a characterization setup operating in either compressed air or water. Pressure sensitivities were similar for air and water environments regardless of the polymer material. However, the sensitivity and resolution of PET pressure sensors were about 2.5 times better than those of PDMS pressure sensors. Moreover, significant degradation of PDMS pressure sensors was observed over time while PET pressure sensors exhibited good stability in water. Overall, PET is better suited for making liquid pressure sensors than PDMS.
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김종찬,김종일,김응곤,김치용,Kim, Jong-Chan,Kim, Jong-Il,Kim, Eung-Kon,Kim, Chee-Yong 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.6
문화는 인간을 인간답게 만들어 주는 요인뿐만 아니라 우리의 일상을 아름답고 풍요롭게 만들어 주는 것으로 삶의 차이를 보여주는 요소로 작용한다. 더욱이 새로운 것을 만들어 가는 역할을 하는 것으로 고부가가치의 원천이다. 21세기에는 예술과 디지털 기술을 결합하여 문화콘텐츠라는 단어를 파생하게 되었다. 문화콘텐츠 복원의 한 방안으로 유물, 도자기, 회화 등의 문화재들을 재해석이라는 관점을 통하여 현시대가 지니는 의미와 기술로 재구성하여 발전시키고 있다. 본 논문에서는 조선시대 회화의 특징인 시 서 화 3절의 근간을 이룬 조선 회화의 재해석을 통하여, 기존 회화를 활용한 멀티미디어 작품들에 텍스트와 이미지를 분석하여 3차원 오브젝트 형태로 제작했다. 그리고 최근 부각되는 문화콘텐츠 복원의 한 방안으로 평면적인 감상에서 벗어나 상호작용성이 있는 작품으로 거듭 나게 제작하였으며, 이를 바탕으로 전통회화를 사용자의 편의성과 접근성을 향상시킨 3D 몽유도원도틀 통하여 우리 문화를 알리는 하나의 방법론을 제시하고자 한다. Culture is not only a factor of a life worthy of man, but also that of beauty and fluency of life,so it works as a key to show differences in the quality of life. Paying attention to culture, which plays a role to create new things, is a source of high-added value. The term of cultural contents was derived in21C, combining digital skills with art. We are going to reconstruct and develope cultural properties such as remains, pottery, pictures, as a way of restoration for cultural contents with the view of reinterpretation. In this paper, we reinterpreted the pictures which were based on three particular elements in Chosun Dinasty- poetry, handwriting, and picture, and we produced 3D objects after analyzing texts and images in multimedia works applied with source pictures. As a highlighted method of restoration for cultural contents, we produced the work which can be interacted and has three dimensional objects getting out of appreciating of plane images. We presented a method of informing our culture with 3D Mong-yu-do-won-do, which used traditional paintings by being improved user friendliness and accessibility.
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김종찬,Kim, Jong-Chan 한국환경보건학회 2012 한국환경보건학회지 Vol.38 No.3
Objectives: The purpose of this study was to provide policy directions for air pollution reduction by analyzing the variation in the characteristics of air contaminants around the Gyeonggi Province area. Methods: The data used in the study was obtained from air quality monitoring stations operated by the Gyeonggi Provincial Government. The target area was the air quality management area of the Gyeonggi Province region. Results: The concentration of $PM_{10}$ (particles measuring $10{\mu}m$ or less) in 2009 was $60{\mu}g/m^3$, which has been reduced by about 2.7% per year after improvement countermeasures were emplaced. The air pollution control policy was especially more effective for coarse particulate matter (CPM, $PM_{10-2.5}$). The improvement of $NO_2$ pollution was generally very low, especially in cities which had considerable automobile traffic. The concentration of $SO_2$ pollution was rapidly improved in industrial areas, but did not show any difference for multiple and general cities. The predicted concentration of $PM_{10}$ for 2014 based on the trend over 2001-2009 was $53.4{\mu}g/m^3$, which fails to meet the target concentration of $40{\mu}g/m^3$. The predicted concentration of $NO_2$ shows a very low probability of achieving the target concentration of 22 ppb, and thus the current improvement of air quality has proven unsatisfactory. Conclusion: Air pollution control policy should be enforced according to regional pollution characteristics in order to obtain maximum effectiveness in improvement.
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Rare Giant Upper Lip Epidermal Cyst in a Patient Wearing a Denture
김종찬,홍인표 대한두개안면성형외과학회 2016 Archives of Craniofacial Surgery Vol.17 No.4
Epidermal cysts are intradermal or subcutaneous cystic tumors that frequently occur in the face, scalp, neck, and body trunk. Acquired cases of epidermal cyst commonly occur as a result of various surgical operations, chronic irritation, or trauma, all of which may trigger the occurrence of the invagination of squamous epithelium. A 57-year-old man presented with a palpable mass 7 cm×2 cm in size in the upper lip. The patient had a 3-year history of wearing a denture to restore missing bilateral maxillary central and lateral incisors, accompanied by inflammatory findings on the buccal mucosa due to chronic lip irritation. The resected oval-shaped cyst had a size of 5.5 cm×3.0 cm×2.5 cm, and it was an encapsulated mass with a well-defined margin. The histopathology was typical of epidermal cyst. This case of a rare giant upper lip epidermal cyst in a patient wearing a denture may be of interest to clinicians.
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