유기성자원의 퇴비원료로 활용 가능성 평가방법 개발

임동규,이승환,성기석,소규호,신중두,이정택 한국환경농학회 2006 한국환경농학회지 Vol.25 No.1

Benzoate, m-Toluate, Phenol의 Pseudomonas putida에 의한 생분해

김장규,김석형,김태환,이대광,김남기 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

It this study, basic data were obtained for the treatment of industrial waste water which includes aromatic compounds. Substrate concentrations used were 100ppm, 500ppm, and 1,000pprn and initial pH's were pH6, pH7, and pH8 in order to obtain the optimum conditions for treating benzoate, m-toluate, and phenol by Pseudomonas putida(KCTC 1644). Durations were 20hrs for 100ppm, 40hrs for 500ppm, and 60hrs for 1,000ppm before the static growth of Pseudomonas putida. 100% of 100ppm benzoate(0.31g cell/1) was biodegraded at pH6, pH7, and pH8 before 20hrs, 52.8% of 500ppm at pH8 in 40hrs, and 27.9% of 1,000ppm at pH8 in 60hrs. The best initial pH was pH8 for the biodegradation and the growth of Pseudomonas putida in benzoate medium. For m-toluate, the best initial pH was also pH8. At this pH, 40.6% of 10Dppm(0.31 cell/1), 21.9% of 500ppm, and 14.1% of 1,000ppm m-toluate were biodegraded respectively in limited time. But for phenol, the best initial pH was pH7. At this point, 9.8% of 100ppm(0.218 cell/1), 7.1% of 500ppm, and 4.7% of 1,000ppm phenol were biodegraded respectively. Therefore, the best carbon source in this experiment was benzoate. Pseudomonas putida was also able to biodegrade m-cresol, p-hydroxybenzoic acid, and benzaldehyde.

초미세 마이크로 소성성형 가공시스템 기술 개발

이낙규,최태훈,이혜진,최석우,박훈재,나원기 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

In this paper Research development about a micro metal forming manufacturing system has been developed. A micro forming system has been achieved in Japan and it's developed micro press is limited to single forming process. To coincide with the purpose to be more practical, research and development is necessary about the press which the multi forming process is possible. We set the development of the equipment including micro deep drawing, micro punching and micro restriking process to the goal. To achieve this goal, Research about micro forming process to be related to multi process forming must be preceded first. Material selection and analysis about micro forming process are accomplished in this paper. And the basis research to make actual system is accomplished.

영상압축표준과 MPEG-2 기술

이규대,고종석 公州大學校工科大學生産技術硏究所 1997 論文集 Vol.5 No.-

In this paper, image compression standards and the core technology of MPEG-2 has been reviewed. In spite of abrupt increase of telecommunications capacity, compression is needed for efficient store and communication of still and moving images. So we have investigated the current state-of-the-art image compression technology, and also studied MPEG-2 core technology thoroughly.

Pt-Co 합금박막형 측온저항체 온도센서의 제작과 그 특성

홍석우,최영규,정귀상 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

We made Pt-Co alloy resistance patterns on the Al_(2)O_(3) substrates by lift-off method and investigated the physical and electrical characteristics of these films under various conditions (the input power, working vacuum, annealing temperature, thickness of thin films) and also after annealing these films. The TCR value of Pt-Co alloy thin films was measured with various thickness of thin films and annealing conditions. The optimum TCR value is gained under conditions 3000Å of thin films thickness and 1000°C of annealing temperature. These results indicate that Pt-Co alloy thin films have potentiality for the high resolution RTD temperature sensors.

ESO기법을 이용한 신뢰성 기반 형상 최적설계

오영규,박재용,황승민,임민규,박재용,한석영 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

This paper presents a reliability-based shape optimization (RBSO) using the evolutionary structural optimization (ESO). An actual design involves uncertain conditions such as material property, operational load and dimensional variation. The deterministic optimization (DO) is obtained without considering uncertainties related to uncertainty parameters. However, the RBSO can consider the uncertainty variables because it has the probabilistic constraints. In order to determine whether the probabilistic constraint is satisfied or not, simulation techniques and approximation methods are developed. In this paper, the reliability-based shape design optimization method is proposed by utilizing the reliability index approach (RIA), performance measure approach (PMA), single-loop single-vector (SLSV), adaptive-loop (AOL) are adopted to evaluate the probabilistic constraint. In order to apply the ESO method to the RBSO, a sensitivity number is defined as the change in the displacement. Numerical examples are presented to compare the DO with the RBSO. The results of design example show that the RBSO model more reliable than deterministic shape optimization.

Activator를 장착한 Ⅲ급 부정교합 아동에서 일부 저작근에 대한 근활성도 분석

김영석,양규호 전남대학교 치과대학 1990 전남치대논문집 Vol.2 No.1

The purpose of the present study was to investigate the influence of activator on EMG activity of some masticatory muscles in Angle Class Ⅲ malocclusion. The subjects were consisted of 23 children with Class Ⅲ malocclusion, 13 boys and 10 girls, ranging in age from 7 to 12 years(mean 8.9 years). The EMG activity from the anterior temporal and masseter muscles was recorded during maximal biting in centric occlusion before, immediately after, twenty days and three months after wearing the activator. The following results were obtained ; 1. Before wearing the activator, there was no significant difference in EMG activity between the masseter and anterior temporal muscles. 2. Immediately after wearing the activator, the EMG activity in the masseter and temporal muscles was markedly reduced. 3. Twenty days after wearing the activator, the EMG activity in the masseter and temporal muscles was markedly increased compared to that obtained immediately after wearing the activator and was not significantly different from that obtained before wearing the activator. 4. Three months after wearing the activator, the EMG activity in the masseter and temporal muscles was markedly increased compared to that obtained before wearing the activator & twenty days after wearing the activator. 5. The significant difference appeared in EMG activity between the masseter and anterior temporal muscles after twenty days of wearing the activator, but disappeared after three months of wearing the activator.

정보통신산업의 국민경제적 위상과 전망

김용규,문석웅,홍동표 한양대학교 디지털경제연구소 2003 디지털경제연구 Vol.8 No.-

영지식 기반의 일방향 신분인증 방식

송규석,김태형,류재철 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.2

Now a days, identification scheme over a network is developed with Zero-Knowledge mechanism so that the interaction gives the verifier the intended result and nothing more. This paper compares the processing speed and communication cost and memory needed for storage of five identification schemes in 2^-20, 2^-30, 2^-72 security level : Fiat-Shamir, Micali-Shamir, Cuillou-Quisquater, Schnorr, and Brickell-McCurley.

橋座裝置下의 콘크리트 破壞擧動에 관한 硏究

車熙石,金圭賢,金勇熙,姜枰求 慶南大學校 附設 工業技術硏究所 1996 硏究論文集 Vol.14 No.1

본 연구에서는 교량파손의 주원인이 되고 있는 하부구조 파손의 대부분을 차지하는 교좌부의 편심문제에 대하여 논의하였다. 교좌부는 상부구조의 지점부에 작용하는 수직하중 및 수평하중을 제한된 받침면적으로 지탱하여야 한다. 이러한 문제는 제한된 콘크리트 면적위에 매우 큰 하중이 국부적으로 작용하는 콘크리트의 지압강도 문제로 귀착되는데 그 거동은 단순치 않다. 따라서 실제 문제에서는 교좌부의 형태가 圓形 또는 矩形이 일반적이나 기초적 연구로서 교좌부의 위치가 교축방향에 직각방향으로 변화할 때 입방공시체의 편심에 따른 파괴거동을 규명하였다. 가압판은 모델의 편의성에 의해 대상하중을 사용하였으며, 편심하중의 위치결정에 근거를 제시하고자 각 절점의 변위 및 요소의 응력상태를 수치해석하여 얻으므로서 교좌부의 파괴거동을 명확히 알 수 있었다. This study examined an eccentricity effect on a shoe of bridge. Bridge fracture occurs on its super-structure and sub-structure. The sub-structure fracture generally results from an eccentricity on the shoe. A shoe with a limited area must withhold all vertical and horizontal loads applied from a bridge super-structure. This mean a problem of concrete bearing capacity, in which a relatively large amount of load is applied on a small area of concrete. A bridge shoe generally has a circular or rectangular shape, but a cube specimen was used in this study to examine the fracture behavior of the shoe by the eccentricity. For this porpose, the shoe location was varied vertically to a bridge axis. In order to understand the fracture behavior with more dedail, each node's displacement and each element's stress was calculated using numerical analysis.