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Tae‐Kyun Hong,Kym‐Na‐Ra Hwang,Jun‐Ran Kim,Young‐Joon Ahn 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.10
The toxicity of Kaempferia galanga rhizome materials and constituents against Meloidogyne incognita second‐stage juveniles (J2) and eggs were examined. The active principles of K. galanga rhizome were identified as the phenylpropanoids ethyl (E)‐cinnamate (EC, 1) and ethyl (E)‐p‐methoxycinnamate (EMC, 2) by spectroscopic analysis. Results were compared with those of carbofuran, fosthiazate, and metam‐sodium. In direct‐contact mortality bioassay, EC (LC50, 0.037 mg/ml) was the most toxic constituent, followed by EMC (0.041 mg/ml). EC was more effective than carbofuran (LC50, 0.092 mg/ml) but less active than fosthiazate (0.002 mg/ml). EC, egg hatch was inhibited 100, 93, and 87% at 125, 62.5, and 31.25 μg/ml, respectively. EMC caused 100, 81, and 75% inhibition of egg hatch at 125, 62.5, and 31.25 μg/ml, respectively. The inhibition of two phenylpropanoids were similar or more inhibition to that of either carbofuran or metam‐sodium but was lower than that of fosthiazate. In contact + fumigant mortality bioassay, EC and EMC treatments resulted in 86 and c 73% mortality at 0.5 and 0.125 mg/g soil, respectively. The lethality of these phenylpropanoids was almost similar to that of either carbofuran or metam‐sodium but was lower than that of fosthiazate. In vapor‐phase mortality bioassay, EC and EMC were more effective in closed container than open containers, indicating that the mode of delivery of these compounds was, in part, a result of vapor action. K. galanga rhizome‐derived materials, merit further study as potential nematicides and hatching inhibitors for the control of M. incognita populations.
가축분뇨를 이용한 SCP 생산 균주의 분리 및 균체 단백질 생산
한석균,고유석,안태영,배동훈 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.6
질소원으로서 계분을 이용하는 균주를 선별하고 계분배지에서 균체의 생육속도가 다른 균주에 비하여 우수한 균주를 분리하였다. 형태·생리학적 특성을 기초로 하여 yeast의 분류 기준과 비교하여 본 균주를 Candida sp.로 동정하였으며 본 균주를 Candida sp. D116으로 명명하였다. Poultry feces extract medium에서 4% 농도의 glucose 첨가가 균체 생육에 효과적이었다. D116 균주를 액체 발효하여 균체생산능, 요산 그리고 가용성 단백질의 변화를 조사하였다. 그 결과 약 60시간이 경과하면 액체 발효 배지내의 거의 모든 가용성 단백질 및 요산의 감소를 보였으며 균체생육은 약 36시간 배양하였을 때 최고조에 도달하였고 그 후에는 점차 감소하는 경향을 보였다. SCP의 대량생산의 결과 50%의 계분혼합 배지와 30℃의 배양 온도에서 36시간 배양하여 균주의 생육수준이 3.8×10^9 CFU/ml 농도의 균체를 생산하였고 200 L의 배양액중 약 870 g-dw의 균체를 얻었으며 생산된 군체의 조단백질 함량은 67%이었다. Production of Single Cell Protein from Poultry Feces. Suk-kyun Han, You-Suk Go, Tae-Young Ahn and Dong-Hoon Bal^1*. Deparment of Microbioligy, College of Natural Sciences, Dankook Univerity, Cheonan 330-714 and Research Center for Molecular Microbiology, Seoul Nationa University, Seoul 151-742, Korea, ^1Department of Food Engineering. College of Engineering, Dankook University, Cheonan 330-714 and Bioproducts Research Center of Yonsei University, Seoul 120-749, Korea - From the soil collected form provincial area of South Korea, a microorganisms which have been shown good growth in the minimal poultry feces extract medium was isolated. Supplement of glucose to the poultry feces extract medium helped the complete degraded during the microbial growth. Maximum cell growth (3.8×10^9 CFU/ml) obtained at 36 hours of incubation after inoculation. Uric acid was degraded faster in minimal medium that in the glucose complement medium. VFA (volatile fatty acid), which are known as major compounds of poultry feces odor, were almost removed from the minimal poultry feces extract medium. Glucose supplement to the minimal medium enhanced the growth of microbial cells. Addition of 4% of glucose and 4% of neopeptone to the minimal poultry feces extract medium helped the maximal growth of cells.
최종운, 유태환, 김수균, 안성옥 배재대학교 공학연구소 2014 공학논문집 Vol.16 No.1
본 논문은 Unity3D 게임엔진을 이용하여 쉽게 접할 수 있는 아케이드 형식의 미니게임을 제작하는데 목적이 있다. 우리는 미니 게임을 통하여 창의력, 반사 신경을 향상시키도록 하였고, 또한 일상생활에서 볼 수 있는 애완동물이라는 소재를 사용하여, 게임에 접근하기 어려운 사람들에게 친근감을 주게 하는 것을 특징으로 한다. 또한 랭킹 시스템을 도입하여 유저들에게 경쟁을 유도하게 하여 유저들의 게임 참가율을 증대하도록 하였다. 본 논문에서는 Unity3D 엔진을 이용하여, 게임의 개발시간을 단축하여 개발 비용을 줄일 수 있으면서도 게임의 질은 떨어지지 않도록 하였다
얼굴 감지기반의 운전자 졸음 방지 시스템에서 영상 크기의 영향 분석
백 태 균1, 이 상 록2 신한대학교 2023 신한대학교 논문집 Vol.46 No.-
This paper analyze the system performance according to the image size at a driver drowsiness prevention system based on face detection. The driver’s face detection is performed using the Python Dlib library based on machine-learning. This system records a video with Full HD resolution and then adjusts the image size to the 4 types of resolution. And it applies HOG and linear SVM to detect the face area, and adopts the EAR criteria to determine driver’s drowsiness. The factors of performance evaluation are an average FPS and detection accuracy, and the performance is compared and analyzed according to 4 types of resolution. As a result of experimenting by applying the system on Raspberry Pi 4, it is possible to secure over 90% accuracy even at SD360 resolution. The average FPS of SD360 resolution is 20.44, which is more than 3 times improved compared to HD resolution. As a result, it is confirmed that it is possible to implement a real-time driver drowsiness prevention system based on face detection even with SD360 resolution of 640*360 size.
[논문]ZCS를 이용한 간단한 long pulse CO2 레이저 전원
김태균,이임근,김희제 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-
30Torr 이하 저압 공진기에서 ms order의 long pulse duration을 가진 간단한 펄스 CO2 레이저를 구현하였다. 레이저 시스템의 새로운 전원은 직접 상용전원을 스위칭한다. 이 새로운 전원의 방전 회로에는 정류기, 축전용 커패시터, 또는 전류 제한용 저항이 필요하지 않다. 레이저 출력을 제어하기 위해 펄스 반복률을 최대 60Hz까지 조절했고,SCR의 스위칭각은 30°에서 150°까지 변화시켰다. ZCS circuit과 PIC one-chip microprocessor는 SCR 게이트 신호를 제어하기 위해서 사용되었다. 18 Torr 압력,60Hz 의 펄스 반복률,SCR 스위칭각 90°에서 최대 레이저 출력 35 W를 얻었다. 또한 다른 CO2 레이저와 비교해서 long 펄스를 얻을 수 있었고 이는 대략 3ms(FWHM) 였다.
권은정,배한익,이태균 동국대학교 경주대학 1996 東國論集 Vol.15 No.-
Endometriosis is characterized by ectopic growth of tissue resembling endometriosis in various extrauterine locations. So we surgically implanted endometrial tissue to serosal wall of small intestine in rats. After that we administrated Naemak-1-ho-hwan for 10, 20, 40, 60, 80, 100 days. The results were as follows: 1. After 4weeks we could observe tissue resembling endometrium in serosal wall of small intestine. Endometrial tissue which was located serosal wall of intestine had the function of growing, secreting and bleeding. 2. The size of the endometrial tissue in the Naemak-1-ho-hwan administrated group was significantly reduced when we compared with water administrated group (control group) . Further more, as the time goes on, the effect of Naemak-1-ho-hwan much better. 3. In case of infected group, we could find abscess and fibriotic change, also like that case Naemak-1-ho-hwan was not effect. 4. There was no difference between Naemak-1-ho-hwan administrated group and control group in the shape of primordial follicle, primary follicle, maturing primary follicle and ovary size. So these results suggest that Naemak-1-ho-hwan will be effect for the patient who suffer from slight endometriosis.
보행 분석기 개발을 위한 흰쥐 척수 편측 절제후 운동회복에 관한 연구
김태균 圓光大學校 醫科學硏究所 1997 圓光醫科學 Vol.13 No.1-2
Spinal cords possess a remarkable capacity for locomotory recovery in the rat. For example, adult rats with dorsally hemisected thoracic(T6) spinal cord recover hindlimb locomotor function within a few weeks. The objective of this study was. therefore, to investigate recovery of locomotion after unilateral spinal cord hemisection in the rat. Especially, we were interested in comparing the locomotion of the limbs between the hemisected side and the intact side. Adult Sprague-Dawley rats(290-310grams) were used. Unilateral hemisection on right spinal cord at T7 was performed on 10 rats under sterile condition. Foot trajectories of tradmill walking animals were video-taped and analyzed using a computerized motion analysis system. The foot trajectopries, stride length, vertical displacement, peek velocities, duration of swing phase, and limb coordination were calculated and plotted. Following the right hemisection. all these kinematic variables were initially disrupted but returned to prelesion values within three to six weeks. Eventhough the lesion was unilateral, locomotory behavior was disturbed bilaterally. Amplitudes(1.44±0.26㎝) and velocities(19.24±3.6㎝/secc) of vertical movement of the hindfoot in the hemisected side was significantly(P<0.01) lower than those of the prelesion values (amplitude 1.96±0.21㎝; velocity 30.60±2.75㎝/sec) and these values did not recover to prelesion levels. The difference in locomotory behavior between the limbs of the injured and uninjured side could not be easily detectable without using detailed kinematic analysis of the limb tragectories. In conclusion, asymmetry of the limb kinematics was found in the vertical movement of the hindlimbs of the unilateral hemisection model.
정태균,박동철 명지대학교 대학원 1999 대학원논문집 Vol.3 No.-
Equalization of satellite communication using Complex-Bilinear Recurrent Neural Network(C-BLRNN) is proposed in this paper. Since the BLRNN is based on the bilinear polynomial it has been more effectively used in modeling highly nonlinear systems with time-series characteristics than multi-layer perceptron type neural networks(MLPNN). The BLRNN is first expanded to its complex value version(C-BLRNN) for dealing with the complex input values C-BLRNN is then applied to equalization of a digital satellite communication channel for M-PSK and QAM, which has severe nonlinearity with memory due to TWTA(Traveling Wave Tube Amplifier). The proposed C-BLRNN based equalizer for a channel model is compared with currently used Volterra filter Equalizer. DFE, and conventional Complex MLPNN Equalizer. The results show that the proposed C-BLRNN based equalizer gives very favorable results in both of MSE and BER criteria over Volterra filter Equalizer, DFE, and Complex MLPNN Equalizer.
정태종,최목균 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.5
교정용브라켓과 교정선 사이의 마찰력에 관련된 요소들에는 브라켓의 종류, 교정선의 재질과 형태, 결찰방법의 차이, 건조환경과 타액환경의 차이, 브라켓간 offset의 차이, 브라켓간 거리, 이동속도 등이 있다. 이러한 요소들에 따른 마찰력의 변화를 비교, 분석하여 각 요소들 간의 관계를 알아보고자 본 연구를 하였다. 8종류의 0.018" x 0.025" 상악 견치와 상악 제2 소구치용 브라켓을 슬라이드 위에 부착시키고 0.016" 및 0.016" x 0.022" 스테인레스 스틸 교정선과 같은 크기의 NiTi 교정선 및 Cu-NiTi 교정선을 이용하여 서로 다른 조건에서 마찰력을 측정하여 다음의 결과를 얻었다. 1.브라켓의 종류에 따른 마찰력의 차이는 Polycrystalline 세라믹 브라켓인 Allure의 평균 마찰력이 가장 높게 나타났고, 세라믹과 합성된 플라스틱 브라켓인 Vogue, 금속 브라켓인 Mini-Twin, 금속 슬롯을 갖는 플라스틱 브라켓인 Elan, monocrystalline 세라믹 브라켓인 Staflre, single 브라켓인 Lewis/Lang, 자가결찰 브라켓인 SPEED의 순으로 감소하였으며, frictionless브라켓인 Shoulder의 평균 마찰력이 가장 낮았다. 자가결찰 브라켓은 원형 교정선에서는 낮은 마찰력을 나타냈고, 사각형 교정선에서는 높은 마찰력을 나타냈다. 2.교정선 재질에 따른 평균마찰력은 스테인레스 스틸 교정선이 다른 교정선들에 비해 통계학적으로 유의하게 낮았으며, NiTi 교정선, Cu-NiTi 교정선 순으로 평균 마찰력이 높았다. 교정선의 형태에 따른 마찰력은 원형 교정선의 평균마찰력이 각형 교정선보다 낮았다. 3.본 연구에서 스테인레스 강으로 결찰했을 때의 평균마찰력이 탄성모듈로 결찰했을 때에 비해 모든 조건에서 통계학 적으로 유의하게 높았다. 4.건조환경에서의 금속 브라켓에 스테인레스 스틸 교정선, NiTi교정선 및 Cu-NiTi교정선의 평균마찰력은 타액환경에서보다 유의하게 낮았다. 5.브라켓간 offset이 증가함에 따라 평균마찰력은 유의하게 증가하였다. 6.브라켓간 거리의 변화에 대한 마찰력의 차이는 교정선의 재질에 따라 차이가 나며, 스테인레스 스틸 교정선은 브라켓간 거리가 감소할 때 마찰력이 유의하게 변화하지 않았으나, NiTi 교정선의 경우는 유의하게 증가하였다. 7.브라켓내의 교정선의 이동속도에 따라 마찰력은 유의하게 변화하지 않았다. 이상의 결과로 볼 때 교정 치료동안 적정 교정력을 유지하기 위해 자가결찰 브라켓, 스테인레스 스틸 교정선과 탄성모듈결찰법을 사용하는 것이 유리하며, 치료시기에 따라서 요구하는 마찰력이 다르므로 상황에 따라 재료를 선택하는 것이 중요할 것으로 사료된다. The purpose of this study was to amount of the frictional forces with the brackets and wires, ligation methods, dry/wet, offsets, interbracket distances, velocity and to compare them each other by different conditions. This study tested 0.018" x 0.025" slot sized 8 types of orthodontic bracket systems and 0.016", 0.016" x 0.022" sized stainless steel, NiTi, Cu-NiTi orthodontic wires. One cuspid bracket were positioned on the slide glass and archwire was engaged into bracket and ligated with elastomeric modules. The values of frictional forces were measured with the Instron universal testing machine. The results were as follows; 1.Polycrystalline ceramic bracket had the highest mean frictional forces and followed and by ceramic reinforced plastic bracket metal bracket, plastic bracket with metal slot, monocrystalline ceramic bracket, single bracket, self-ligating bracket. friction free bracket in descending order. The self-ligating bracket showed low frictional forces in the round wires and high frictional forces in the rectangular wires. 2.Stainless steel wires had the least frictional forces and followed by NiTi, Cu-NiTi wires in descending order. Round wires had lower frictional forces then that of rectangular wires. 3.The stainless steel ligation method had significantly greater mean frictional forces them the elastomeric module ligation method. 4.Artificial saliva statistically increased the frictional forces in stainless steel wire, NiTi wire and Cu-NiTi wire. 5.There was a statistically significant difference with offset change. 6.There was no statistically significant difference with interbracket distance in stainless steel wires but a significant difference in NiTi wires as the interbracket was decreased. 7.There was no statistically significant difference with velocity change. From the above findings, self-ligating bracket, stainless steel wires and the elastomeric module ligation method might be effective than any other materials to reduce the frictional forces in the orthodontic treatment and can be correlated to clinical situations seen in orthodontic patient care.