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Ji Chang Woo,Kim Nam-Jung,Lee Sang-Guei,Hwang-Yong Kim,Choi Hoon-Sik,Song In-Sun,Ko Jee Sun 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05
We analyzed the chirp sound and behavior of Teleogryllus emma with observation system, which was consisted of computer, ccd-camera and microphone. Computational methods of wavelet transformation and Self-Organizing Maps (SOM) were utilized to characterized the chirp sound of insect species for automatic counting in this study. Wavelets were initially applied to feature extraction of the chirp sound. Wavelet coefficients were accordingly calculated based on the basis function (e.g., Morlet). The obtained coefficients were subsequently provided to count number of chirps in each song. Sound structure of insect specimens consisted with long chirp and short chirp and the patterns of song were grouped by frequency of long chirp and short chirp. The song patterns of insect specimens were divided by Self-Organizing Map (SOM) that was used number of chirp as input data. Application of computational methods to automatic detection of chirp sound was further discussed for obtaining objective assessment in behavior science.
Ga_(0.6)Sb_(1.4)Se₃單結晶의 光傳導度 特性
宋燦日,劉炳守,李愚宣,金南伍,金亨坤 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2
Ga_(0.6)Sb_(l.4)Se₃single crystals were grown by the Bridgman technique method, These single crystals had orthorhombic structure, and lattice constant and electric conduction type of Ga_(0.6)Sb_(l.4)Se₃single crystals was a = 11.860Å , b = 12.057Å, c = 4.103Å and p-type, respectively. Direct band gap of Ga_(0.6)Sb_(l.4)Se₃single crystals obtained from optical absorption spectrum were 1.17 eV. Photoconductivity spectrum measured at 10K showed that the photoconductivity peak in Ga_(0.6)Sb_(l.4)Se₃single crystals was located in 960 nm.
열처리에 따른 Cd₁-xZnxS/In 박막의 광학적 및 전기적 특성 분석
송우창,이경호,심상흥,이상교,심재선,박종국 三陟大學校 2002 論文集 Vol.35 No.-
In this thesis, effects of the thickness of indium films and the annealing temperature on optical and electrical properties of chemically deposited CdZnS films for the efficiency of the Cd1-xZnxS/CdTesolar cells were investigated. To improve the electrical conductivity of Cd1-xZnxs films, thin indium films(10-4Onm thickness)were evaporated on the suface of Cd1-rZnxs films. Experimental parameters such as indium film thickness, Zn mole fraction, and the annealing temperature in terms of structural and electrical properties of Cd1-xZnxs films were investigated. The diffusion process was carried out by heating the sample in air at 150-550℃ for 20 minute As the indium film thickness is increased, the resistivity decreases and the lowest value(0.3 O -cm)is obtained for Cd1-xZnxs films annealed at 450℃ with 40nm of the thickness.
Song, Chang-Hyun,Kim, Jin-Soo,Shinde, Prashant,Kim, Young-Woo,Kim, Kwang-Hyun,Kwon, Ill-Kyung,Kang, Sun-Moon,Lee, Sung-Ki,Chae, Byung-Jo Korean Society for Food Science of Animal Resource 2010 한국축산식품학회지 Vol.30 No.4
In this study, pigs [n=117; (Landrace ${\times}$ Yorkshire) ${\times}$ Duroc; $64{\pm}0.5$ Kg initial body weight] were used to investigate the effect of feeding different levels of lacquer (Rhus verniciflua Stokes) meal on performance, carcass traits and quality of meat kept under refrigeration at $3{\pm}1^{\circ}C$. The pigs were randomly allotted to 3 treatments on the basis of body weight and sex and each treatment was replicated 3 times (13 pigs in each replicate). Lacquer meal in sawdust form obtained from the stem bark and heartwood of sun-dried lacquer trees was added to the grower and finisher diets at 0, 20 and 40 g/kg diet. The experimental diets were fed for 8 wk. Inclusion of lacquer meal had no influence (p>0.05) on growth performance of pigs. Improvement in carcass traits and decreased back fat thickness were noticed in pigs fed diets added with 20 and 40 g/kg lacquer meal. Longissimus muscle obtained from pigs fed lacquer meal had higher moisture and lower fat content, thiobarbituric acid reactive substances and water holding capacity. Meat from lacquer fed pigs was also darker and redder. The data indicates that lacquer meal can be incorporated up to 40 g/kg in the diet of fattening pigs without affecting growth performance. Also, lacquer meal increases carcass lean content and improves the oxidative stability of the meat.
송혁,송민정,최형욱,김선우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
The prediction of aircraft noise is based on the database of airplane's noise characteristics such as take-off and landing style etc. In this study, to predict the airplane flight noise, airplane which is being used for passengers and cargos currently are surveyed. The airplanes were divided into types and the noise characteristics of take off, flight at constant speed and landing were analyzed to establish database for prediction of aircraft noise. And the result of this study should be connected with GIS(Geographic Information System) to measure the area which is affected by aircraft noise.
Brushless 同期發電機의 特性에 關한 硏究 : 主로 自勵型 Brushless 單相同期發電機의 應用에 對하여
宋鐵,鄭憲相,李愚宣 朝鮮大學校 1977 綜合論文集 Vol.1977 No.-
As an excitation system of the synchronous generator, an exciter which is directly connected to the main shaft, comprising some restrictions by the increasing capacity under the condition of commutation, has generally been used. In order to solve the restriction problem as well as to operate the generator without difficulty, it is desired to get rid of electrical sliding contacts such as brush and slip ring. To eliminate these electrical sliding contacts, several types of brushless generators have been developed, one of which being understood to be the self-excited brushless single-phase synchronous generator. In this paper, the results of experimental test about the characteristics are analyzed. There are not a few possibilities in the CT connection wherein the load current affects the exciting current.
Dehydrogenative Polymerization of New Alkylsilanes Catalyzed by ??
우희권,송선정 全南大學校 觸媒硏究所 1996 觸媒硏究 論文集 Vol.18 No.-
새로운 알킬 실란의 3-aryl-1-silabutanes 1-4을 합성하고 6족 전이금속 착물인 ??을 사용하여 탈수소 중합을 시켰다. 전이금속 4족 착물인 metallocene계 촉매에 비해 분자량이 현저히 증가된 실리콘 고분자를 얻을 수가 있었다. 6족 전이금속 촉매에 의한 탈수소 중합 메카니즘을 제시하였다.
유건우,이선희,임수정,박형진,김태신,송은식,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1
A 6 years old Schunauzer dog (7.2kg, intact female) with history of hematuria for two days was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Complete blood cell count showed no significant abnormalities and serum chemistry profile showed increased phosphate profile. On urinanalysis, there was evidence of bacterial infection. On ultrasonographic evaluation, irregular renal contour and increased echogenecity, pelvic and uretral dilation, and thickening of urinary bladder wall were observed. Based on these finding, the dog was diagnosed as pyelonephritis. The dog was treated with antibiotics based on antimicrobial susceptibility test results, then successfully resolved after 8 weeks of treatment.
송민정,기노갑,장길수,김선우 대한건축학회 2004 대한건축학회논문집 Vol.20 No.10
A sound classification system for floor impact sound insulation performance is needed to secure comfortable acoustical quality in apartment houses To achieve this goal, psycho-acoustic experiments were earned out with the sound sources of standard light and heavy impact source in a laboratory As a result of this study, followings are suggested 49dB for light impact sound source and 46dB for heavy impact sound source are recommended minimum level for inhabitants And level differences between classes are 5dB But the situation of sound insulation performance against floor impact sounds can't meet this recommended level Due to these kinds of matters, foreign countries set the minimum class 58dB for light impact source(Europe) and 55dB for heavy impact source(japan) So, the sound insulation classification system in which its minimum class are 58dB(light), 55dB(heavy) and its interval is 5dB is suggested And arithmetic mean value of testing frequencies shows a good relation coefficient between subjective response and rating value both in light and heavy impact sound source