입지환경인자에 의한 지위지수(地位指數)에 관한 연구

김규헌 한국임학회 1987 한국산림과학회지 Vol.76 No.3

立地環境因子의 數量化에 依한 地位指數 査定方法을 究明코자 全國을 對象으로 낙엽송 잣나무 강송 標準地를 選定調査分析한 結果 다음과 같이 나타났다. 1. 낙엽송 地位指數推定基準表를 作成한 바 重相關係數 0.8797, 誤差率 6.0%로 나타났고, 2. 잣나무 地位指數推定基準表를 作成한 바 重相關係數 0.8607 誤差率 7.0%이며, 3. 강송 地位指數推定基準表를 作成한 바 重相關係數 0.916 誤差率 8.4%로 나타났다. 그러므로 地位指數査定 및 收穫子測 等에 直接實用化 시킬 수 있으며 適地選定의 客觀的인 指標로 提示될 수 있다.

광자극발광법과 열발광법 분석을 통한 전자선과 감마선 조사식품의 비교 연구

김규헌,곽지영,윤진호,박영은,이재황,박용춘,조태용,이화정,이상재,한상배 한국식품위생안전성학회 2013 한국식품위생안전성학회지 Vol.28 No.3

This study was conducted to determine the PSL and TL properties of foods irradiated with electron beam and gamma-ray. 5 kinds of food including cereal, pulse, fish powder, dried vegetable and tea were irradiated at 0 to 10 kGy by electron beam accelerator or 60Co gamma-ray irradiator. The PSL analysis showed negative results for most of the non-irradiated samples. Non-irradiated shrimp powder showed intermediate result. Irradiated samples gave negative or intermediate or positive value which presented the limitation of PSL technique. In TL analysis, there were TL glow curves at around 300oC with low intensity on non-irradiated samples. Maximum peak in the range of 150-250oC was appeared on irradiated samples. TL ratio obtained by re-irradiation with 1 kGy was less than 0.1 on non-irradiated samples and higher than 0.1 on irradiated samples. Therefore, in PSL measurement, electron-beam irradiated samples could obtain more clear results. TL analysis showed obvious difference between non-irradiated and irradiated samples. But the identification was impossible for the sample of rice and lemon tea. Because of it's low contents of mineral.

초경량 대화형 데이터 서비스 기술 : LASeR (Lightweight Application Scene Representation)

김규헌,Kim Gyu-Heon 대한전자공학회 2006 전자공학회지 Vol.33 No.9

일축배향 기공채널과 향상된 압축강도를 갖는 다공질 알루미나/뮬라이트 층상 복합체

김규헌,김태림,김동현,윤석영,박홍채,Kim, Kyu Heon,Kim, Tae Rim,Kim, Dong Hyun,Yoon, Seog Young,Park, Hong Chae 한국세라믹학회 2014 한국세라믹학회지 Vol.51 No.1

Three-layer porous alumina-mullite composites with a symmetric gradient porosity are prepared using a controlled freeze/gel-casting method. In this work, tertiary-butyl alcohol (TBA) and coal fly ash with an appropriate addition of $Al_2O_3$ were used as the freezing vehicle and the starting material, respectively. When sintered at $1300-1500^{\circ}C$, unidirectional macro-pore channels aligned regularly along the growth direction of solid TBA were developed. Simultaneously, the pore channels were surrounded by less porous structured walls. A high degree of solid loading resulted in low porosity and a small pore size, leading to higher compressive strength. The sintered porous layered composite exhibited improved compressive strength with a slight decrease in its porosity. After sintering at $1500^{\circ}C$, the layered composite consisting of outer layers with a 50 wt% solid loading showed the highest compressive strength ($90.8{\pm}3.7MPa$) with porosity of approximately 26.4%.

운접봉소단부의 형상과 응력집중율에 관한 연구

김규헌 한국수산학회 1978 한국수산과학회지 Vol.11 No.3

光彈性實驗法에 依하여 連接棒 小端部의 形狀變化에 따른 應力集中率을 求한 結果를 要約하면 1. s/r가 增加함에 따라 α₁은 增加하고 α₂는 減少한다. 2. s'/r가 增加함에 따라 α₁, α₂는 減少한다. 3. s'/r>s/r에서 α₁, α₂減少率이 커진다. The aim of this study is to affirm what the relation between s'/r and α₁, α₂ during the transformation of s/r is, where s' is the thickness of lateral sides of the small end, r, outer circle radius, α₁, stress concentration factor on periphery of inner circle, α₂, stress concentration factor on periphery of outer circle and s, thickness of top and bottom sides of small end. The author carried out a photoelastic experimentation and two-dimension similitude small ends were utilized as the specimens. Given the tention on the small end of connecting rod, the results may be abstracted as follows: 1. α₁ increases and α₂ decreases gradually as s/r increases. 2. α₁ and α₂ decrease as s'/r increases. 3. α₁ and α₂ decrease more rapidly when s'/r becomes roughly larger than s/r.

지상파 DMB 대화형 방송 콘텐츠 저작 기술

김규헌,안상우,임영권,유영재,정원식 에스케이텔레콤 (주) 2005 Telecommunications Review Vol.15 No.5

본 논문에서는 지상파 DMB 서비스를 위한 대화형 방송 콘텐츠를 쉽고 간편하게 저작할 수 있도록 하는 지상파 DMB 대화형 방송 콘텐츠 저작 기술에 대하여 소개한다. 지상파 DMB 대화형 방송 콘텐츠는 MPEG-4 Systems 기술에 기반을 두고 있기 때문에 많은 수의 노드, 라우트 및 기술자들의 조합으로 표현된다. 따라서 지상파 DMB에서의 대화형 방송 서비스를 활성화하기 위해서는 MPEG-4 Systems에 대한 기술적인 지식이 없는 경우에도 쉽고 간편하게 대화형 콘텐츠를 저작할 수 있는 대화형 콘텐츠 저작 기술이 필수적이다. 본 논문에서 소개하는 지상파 DMB 대화형 콘텐츠 저작 시스템은 지상파 DMB 규격 및 MPEG-4 Systems 규격을 준수하도록 개발되었으며, 상기 규격에 대한 지식이 전혀 없는 일반 사용자들도 쉽고 간편하게 대화형 콘텐츠를 저작할 수 있도록 개발되었다.

호텔기업 종업원의 팀웍영향요인에 관한 연구

김규헌,윤정헌 한국산업경제학회 1999 산업경제연구 Vol.12 No.1

TL과 ESR 분석을 통한 일부 향신료, 장과류 및화분가공추출물 검지 특성 연구

김규헌,손진혁,강윤정,박혜영,곽지영,이재황,박용춘,조태용,이화정,이상재,한상배 한국방사선산업학회 2013 방사선산업학회지 Vol.7 No.1

This study examined radiation detection characteristics of spices (cumin, caper andturmeric), other small fruits (hut-gae berry and boxthorn), and pollen extract product. Each sampleswere irradiated at dose of 1, 5, and 10 kGy and analyzed by the thermoluminescence (TL) andelectron spin resonance (ESR) methods. To compare between non-irradiated and irradiated food,all samples were irradiated with 60Co gamma-ray source. In TL analysis, most of samples couldbe applied to detect irradiated foods because of showing TL ratio above 0.1. The glow curves examinedby TL method were estimated in the range of 150~250 C in irradiated samples. In ESR measurements,the intensity of ESR signal (single-line) increased as the increase of irradiation dose. Inparticular, the specific ESR signals of irradiation-induced radical were detected in hut-gae berryand pollen extract product. As a results, it is considered that TL and ESR methods can be used todetect both hut-gae berry and pollen extract product. But cumin, caper, turmeric and boxthornirradiated with gamma ray could be detected only by TL method. It is concluded that TL and ESRmethods are suitable for detection of irradiated samples and a combined method is recommendablefor enhancing the reliability of detection results.

순환골재와 플라이애시가 콘크리트 유동성 및 강도에 미치는 영향

김규헌,신명수,공영식,차수원 한국콘크리트학회 2013 콘크리트학회논문집 Vol.25 No.2

As the amount of construction wastes increase, reuse of demolished concrete is being considered in research areas. Reflecting these interests, this experiment was performed to clarify concrete’s mechanical property and workability using recycled aggregate as a coarse aggregate. Eleven cases of concrete specimens were produced by changing the rates of replacement of coarse recycled aggregate, replacement of fly ash, design strength, and moisture state of coarse aggregate. Compressive and tensile split strength tests were taken to study the mechanical properties of hardened concrete. To verify flowability of fresh concrete, a slump test and a flow curve test using ICAR Rheometer were performed. It was found that using recycled aggregate and fly ash leads good workability by testing slump and flow curve. The yield stress of fresh concrete decreased with increase of recycled aggregate substitution rate. Through the test, it was confirmed that there is inversely proportional relationship between the slump and yield stress roughly. Recycled aggregate concrete containing fly ash has considerably lower plasticity viscosity than not containing fly ash. Strength test results showed that recycled aggregate tended to decrease compressive and tensile strength of concrete, when recycled aggregate was used as a coarse aggregate. Using over 30% recycled aggregate caused significant decreases in compressive and tensile strength. Replacing 30% cement with fly ash was helpful to improve the long-term strength of concrete.

舊東獨의 法秩序와 司法組織(下)

金圭憲 법조협회 1991 法曹 Vol.40 No.9