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이창섭,송형근,이상호,최용성 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.3
The effects of electro-acupuncture on the pain threshold and the amplitude of dEMG(digastric EMG) evoked by the noxious electric stimulation on teeth and gingiva in dogs were studied. Experiments were carried out with 10 dogs weighing 5-8kg. Each animal was anestheticed with Entobar given intraperitoneally in an initial dose of 30㎎/㎏. Maintenance dose of 5㎎/㎏/hr was given through a cannula, in the femoral vein, as required to keep up light anesthesia. Bipolar stimulating wire electrodes, 0.1mm in diameter, insulated except for tips, were inserted into the upper canine and palatal gingiva. Rectangular aluminium plate electrodes (15×5mm) were placed on acupuncture points, called Yin-Hsiang, located at both sides of the upper jaw. Rectangular biphasic current pulses of 2Hz, with a 250μsec duration,were delivered for 15 minutes. The dEMG activities were recorded from the anterior belly of the digastric muscle(one of the jaw opening muscles) using bipolar wire electrodes. The magnitude of the jaw opening reflex at different intensties of electro-acupuncture(1volt 4volt and 10volt) was estimated by averaging the 30 superimposed dEMGs recorded on an oscilloscope and audiomonitor. Data were analysed statistically with ANOVA and paired t-test. The obtained results were as follows : 1. Pain thresholds were increased 7.7%, 15.4%, 17.3% in the teeth and 11.1%, 19.0%, 25.4% in the gingiva as the intensities of electro-acupuncture increased incrementally. 2. Amplitudes of dEMG were decreaed 8.3%, 22.4%, 27.4% in the teeth and 9.8%, 36.5%, 42.2% in the gingiva as the intensities of electro-acupuncture increased incrementally. 3. Inhibition of pain responses by the electroacupuncture was more effective in the gingiva than in the teeth.
Computer Graphics에 의한 3성분계 Wilson, NRTL 및 UNIQUAC 방식을 이용한 VLE 추정방식의 비교
신형섭,박종철 慶熙大學校 1988 論文集 Vol.17 No.-
The purpose of this study is to estimate VLE by means of the Wilson, NRTL, UNIQUAC equations and to compare with these three methods for two ternary systems: ethanol-benzene-cyclohexane, cyclohexanone-cyclohexanol-phenol, by the computer graphic technology. The temperatures and compositions of two systems were estimated by means of three TPTT equations. Isothermal lines of these two ternary systems were graphically illustrated from these estimated values and the reported experimental values. As a result of the analysis of the parameters and computer graphics, these parameter pairs changing with respect to the temperature and composition of the solutions. From the result of plotting the parameter pairs, A_12, vs, A_21, a locus contour between two parameters is observed, therefore numerous number of roots to satisfy these TPTT equations are found. These phenomena is nearly identical with the previously reported results that there are some correlation between these parameter pairs.
안삼근,강형철,안상열,이균필,변희섭 경상대학교 농업생명과학연구원 2002 농업생명과학연구 Vol.36 No.4
본 연구는 집성 염색 무니목 개발을 위하여 사용 가능한 수종과 3종류의 염료를 사용하여 염색시간, 염색온도, 함수율 및 Flitch 제작에 대하여 연구한 결과는 다음과 같다. 실험에 사용한 4수종 중에서 선삭성이 불량한 은수원 사시나무를 제외한 3수종인 소나무와 이태리 포플러, 마티카가 사용 가능한 수종으로 밝혀졌다. Stain은 번지거나 얼룩이 지는 현상, Dylon은 침투 불균일로 부적당하였으나 Fine은 염색상태가 양호하였다. 염색시간은 5시간 이상 되어야 염색정도가 양호하였고, 염색온도는 90℃에서 가장 적당하였으며 생재와 기건재 및 포수재에 대한 영향은 큰 차이가 없었다. Flitch제작에 적당한 함수율은 9%이었다. This study was carried out to develop laminated dyeing wood, for which usable three sixties of trees and 3 kinds of dye stuffs were used to investigate dyeing time, dyeing temperature, moisture content and manufacture of flitch, the results were as follows: Out of four species of trees used in the experiment, it was found that three species, Pinus densiflora, Populus euramercana and Dyrea costulata were usable excluding Populus tomentiglandulosa whose cutting ability was bad. As to influence according to the kind of dye stuff, the Stain of low price could be used as a coloring agent but it was not proper as a dyeing agent due to spreading or staining phenomenon. As Dylon which was generally used to dye textile penetrated them uneven, dyeing only their surface, it was also found improper to be used. On the other hand, the dyed condition was good with Fine. The dyed condition was good when dyeing time was more than 5 hours and it was the most adequate when the temperature was at 90℃. There was no significant difference between their influence on green, dried and saturated wood.-In the manufacture of Flitch, the most appropriate moisture content was 9%.
서덕영,장승기,경문현,박섭형 경희대학교 산학협력기술연구원 1996 산학협력기술연구논문집 Vol.2 No.-
This paper describes two traffic shaping methods for VBR(variable bit rate) video bit streams encoded in the MPEG-2 syntax. Difficulties in control of VBR video traffic are lessened by traffic shaping. Burstness of single layer MPEG-2 can be reduced by performing intra-refresh in more than one consecutive frames. In two layer encoding of spatial scalability, burstness can be reduced by setting the temporal locations of GOP starting frame of a layVBR 트래픽을 허용한다는 것이다. 모든 AAL er, differently from the other. Queueing analysis shows that these two methods outperform conventional encoding schemes in terms of temporal and semantic QoS requirements.
( Hyeong Seop Kim ),( Ye Rin Choi ),( Mi Gun Hong ),( Min Jea Shin ),( Sang Jun Yoon ),( Na Young Lee ),( Hyun Ji Ye ),( Sang Hak Han ),( Dong Joon Kim ),( Gi Soo Youn ),( Ki Tae Suk ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Liver fibrosis constitutes a serious problem worldwide due to its rapidly leads to cirrhosis, and even cancer. However, there is no clear medical treatment other than treating the cause. Urushiol has been known to have anti-inflammatory and anti-oxidative effects on various disease. We investigated the effect of urushiol on liver fibrosis induced by thioacetamide (TAA). Methods: Thirty C57BL/6 mice were randomly divided into 3 groups and urushiol was dissolved in vehicle (DMSO) for in vivo experiments: (1) control group; (2) TAA (normal saline as solvent, 300 mg/kg/day, 3 times/week, i.p.) + vehicle (gavage). (3) TAA (300 mg/kg/day, 3 times/week, i.p.) + urushiol (0.128 mg/ mL/day, 28 times, gavage). These groups were analyzed by immunohistochemical staining, reverse transcription polymerase chain reaction, and microarray. Results: The TAA + Urushiol group improved the deposition of fibrillar collagen (Sirius Red (%) 1.55 ± 0.25 vs. TAA, P<0.0001), Fibrosis stage reduced (1.64 ± 0.20 vs. TAA, P<0.0001) and Inflammation activity decreased concurrently (1.17 ± 0.16 vs. TAA, P<0.0001). The analysis of mRNA expression showed that Col1a1 (2.30-fold change vs. TAA, P<0.0001) and TIMP-1 (1.48-fold change vs. TAA, P<0.05), IL-6 (3.03- fold change vs. TAA, P<0.0001), JAK2 (0.89-fold change vs. TAA, P<0.05), STAT3 (3.26-fold change vs. TAA, P<0.0001) downregulated significantly. As shown microarray analysis, downregulation of Col1a1 (1.12-fold change vs. TAA, P<0.05), Chka, lipid metabolic process gene (2.21-fold change vs. TAA, P<0.001), Pnpla3, patatin-like phospholipase domain containing 3 (1.57-fold change, P<0.001) Contrast, Orm2, regulation of immune system process gene (2.28-fold change vs. TAA, P<0.001) Saa1, serum amyloid A (2.25-fold changes vs. TAA, P<0.05), Saa2 (3.09-fold change, P<0.001) Conclusions: Our results indicated that urushiol has therapeutic effect on liver fibrosis. Although it is needed more clinical research, urushiol can be a potential agent for the treatment of liver fibrosis.
MULTI-POINT MEASUREMENT OF STRUCTURAL VIBRATION USING PATTERN RECOGNITION FROMCAMERA IMAGE
HYEONG-SEOP JEON,YOUNG-CHUL CHOI,JIN-HO PARK,박종원 한국원자력학회 2010 Nuclear Engineering and Technology Vol.42 No.6
Modal testing requires measuring the vibration of many points, for which an accelerometer, a gab sensor and laser vibrometer are generally used. Conventional modal testing requires mounting of these sensors to all measurement points inorder to acquire the signals. However, this can be disadvantageous because it requires considerable measurement time andeffort when there are many measurement points. In this paper, we propose a method for modal testing using a camera image.A camera can measure the vibration of many points at the same time. However, this task requires that the measurementpoints be classified frame by frame. While it is possible to classify the measurement points one by one, this also requiresmuch time. Therefore, we try to classify multiple points using pattern recognition. The feasibility of the proposed method isverified by a beam experiment. The experimental results demonstrate that we can obtain good results.
Hyeong seop Jeong,Jae Sung Woo,Hee seok Kweon,Bum han Ryu 한국구조생물학회 2019 Biodesign Vol.7 No.2
The Falcon 2 camera (Thermo Fisher Scientific Inc., USA) mounted in High Resolution Bio-TEM at Korea Basic Science Institute (KBSI) was upgraded to Falcon 3EC in August 2017 (Jeong et al., 2017). Compared with Falcon 2, Falcon 3EC has better sensitivity and higher frame rate and can be operated in electron counting mode. These changes significantly increase the data quality, thereby increasing the resolution of the 3D structure. In the benchmarking test of this machine, the structure of inhibitor-free beta-galactosidase has been solved at 2.16 Å. Here we introduce main features of the new detector, and discuss about major considerations required for its operation and data collection strategies to achieve the near atomic resolution.