원형도파관과 구형도파관간의 T-접합 분기회로 해석

문성익,허광삼,김윤영,양두영 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.1

In this paper, the T-junction branch network of the orthomode transducer is analyzed. The T-junction blanch network consists of the cylindrical common waveguide and the rectangular sub-waveguide. Using the vector potential of each region, the hybrid mode is considered. Based on the derived electromagnetic components, scattering parameters of the T-junction branch network are calculated. The cylindrical waveguide size and the rectangular waveguide size are WR62 and WC55. In order to analyze the discontinuity of the T-junction branch network, high order mode of the branch region is considered the 15th. From the results, the transmission coefficient. S31 and S21 show -3dB, the reflection coefficient, S11 and S33 are -10dB, -8dB in the range of 13.3GMz∼16GHz.

서비스 시스템의 분포형태 조사 및 적합도 검정시 유의수준의 영향 분석

문기주,양승만 대한설비관리학회 2003 대한설비관리학회지 Vol.8 No.2

It is common to use an empirical distribution if the collected field data set is not accepted by a goodness of fitness test for a simulation study. However, a theoretical distribution is recommend to use for model building to the shortcomings of reproducing the observed data only. It is true that the possibility of passing a goodness of fit test for a set of observed data collected in the field is relatively low. In addition, determination of significance level for a theoretical distribution examination is not a simple question, either. It can be claimed that the level of significance determines whether the goodness of fit test for a observed data set is passed or not. Therefore, it is a very interesting issue that observing the effects with various levels of significance value in a simulation model. In this paper, the results of goodness of fit tests with observed data sets are presented. Also, a single line single server simulation model is constructed to examine the effect of significance level. Some selected data sets passing the Goodness of Fit test with certain levels of significance are used for this analysis.

이동통신 환경에서 DS-CDMA 신호의 방향성 추정

양두영,문성익 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.2

The DOA(direction of arrival) of DS-CDMA signals for mobile communication environment was estimated using non-parametric algorithm and MUSIC(multiple signal classification) algorithm. The non-parametric algorithm with regularizing sparsity constraints achieved super-resolution and noise suppression. effectively. This algorithm offered the increased resolution and significantly reduced sidelobes compared with MUSIC algorithm. The numerical analysis showed that it can accurately find DOA and improve the detection probability of the multiple signals.

MUSIC 알고리즘을 이용한 적응 빔 성형에 관한 연구

문성익,이광식,양두영 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1

In order to estimate DOA(Direction Of Arrival) of signal, the adaptive beam forming algorithm based on MUSIC(Multiple Signal Classification) is studied and analyzed. The eigenvalues for the signal component and the noise component are obtained from correlation matrix of the received signal by array antenna. The eigenvalues classified the signal components into the noise components decide the power spectrum of the received signal. From the results, DOA is estimated by the signal and noise spatial vector, and the steering beam pattern is found by weight vectors calculated from the spatial vector, effectively.

Ku 밴드 안테나 급전 시스팀 설계

문성익,이정란,양두영 濟州大學校 工科大學 産業技術硏究所 1998 尖端技術硏究所論文集 Vol.9 No.2

In this paper, design of the antenna feed system for Ku-band is presented by TEmn χ mode theory. The antenna feed system consists of diplexer combined with transmitting filter and receiving filter, OMT( Othogonal Mode Transducer) and polarizer. These filters are designed by the insertion loss method which is applied to the mode matching method. Matching elements in the inner waveguide set to reduce mismatching conditions on the discontinuity imposed by T-junction. so that a diplexer is optimized and has the best property. The optimum filter appeared characteristics that reflected power is about -2OdB in the receiving and the transmitting passband. The differential phase shift of the corrugated polarizer combined with OMT achieved 90° ± 1° within 14.0 - 14.5GHz frequency-band. The maximum VSWR is only about 1.02 and axial ratio(AR) is about 1.01. The designed feed system has suitably separated between the polarized wave and the frequency bandwidth.

수정곡면 이중 옵셋 그레고리안 안테나 설계

문성익,양두영 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.2

In this paper, design procedure of the shaped dual offset gregorian antenna is proposed. The electric field distribution of aperture for main reflector is calculated by using taper factor and cos-q factor. The approximated equations of parameters are derived by the geometrical optics theory which determines the geometrical structure of the antenna. The results using the taper factor show characteristics that maximum side lobe level, spillover efficiency and illumination efficiency are -23dB. 89% and 89%. In case of the cos-q factor, they show that those are -27dB. 91% and 91%. respectively. Finally, the shaped dual offset gregorian antenna system by using cos-q factor with the improved characteristics has been designed.

원형도파관과 구형도파관간의 T-접합 분기회로 해석

문성익,김윤영,허광삼,양두영 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

In this paper, the T-junction branch network of the orthomode transducer is analyzed. The T-junction branch network consists of the cylindrical comnion waveguide and the rectangular sub-waveguide. Using the vector potential of each region. the hybrid mode is considered Based on the derived electromagnetic components. scattering parameters of the T-junction branch network are calculated. The cylindrical waveguide size and the rectangular waveguide size are WR62 and WC55. In order to analyze the discontinuity of the T-junction branch network. high order mode of the branch region is considered the 15th. From the results. the transmission coefficient. S_(31) and S_(21) show -3dB. the reflection coefficient. S_(11) and S_(33) are -10dB. -8dB in the range of 13.3GHz-16GHz.

大學校 敎職員의 健康實態에 관한 基礎的 調査硏究

양점홍,황철문,남태호,백영호,윤양진,황영성 부산대학교 사범대학 1993 교사교육연구 Vol.26 No.-

The purpose of this study was to analyze the staffs' health of P. University through survey research. Also, the staffs's health problem was analyzed by the regular health test's result and their lifestyle. The results were as following: 1. The analysis of lifestyle (1) A habit of smoking 1. It was presented the male smokers(55.9%) and females smokers(0.6%) of P. university staffs were found in this study. 2. It was presented the male smokers smoked average 18.2 pieces a day. Also, they began to smoke cigarette 21.5 years old. 3. The persistent smokers were 24.6% and 52.2% of smokers be going to quit smoking cigarette someday in the future. (2) A habit of drinking 1. It was presented 85.7% of males and 59.1% of females subject drinking normally. 2. It was presented 3.7% of male subjects were drinking alcohol almost everyday in a week. 3. The most frequent kind of alcohol is as following order a beer(males 67.6% & females 79.6%) and a soju(males 28.3% & females 4.3%). Males drunken average amount of beer was 2 bottles(640ml) and females drunken average amount of beer was 0.8 bottles in a week. (3) A habit of exercise 1. It was presented males (29.0%) and females (15.1%) were exercising regularly, but males (23.3%) and females (38.6%) of staffs were not exercise at all. 2. It was found males' regular kind of exercise was as following order mountain-climbing, tennis, and jogging and females' regular kind of exercise was as order swimming, free handing exercise, and mountain-climbing. 3. It was presented 25.1% of staffs exercised 6 times a week regularly. And each times of exercise, 37.3% of staffs spent less than 30 minutes. 4. It was presented staffs exercised for health (72.4%) and 48.4% of staffs could not exercise as following reasons of not enough times, home work, research.... 5. Male staffs prefer as following order kind of sport tennis, swimming, and golf and female staffs prefer as following order kind of sport swimming, tennis, and bowling in the future. (4) A habit of eating 1. It was presented 5.5% of males and 16.6% of females did not have a breakfast regularly. 2. Concerning balance of food content: do not concerning food (males 34.7% & females 23.8%) and subjects like vegetables 9males 25.7% & females 32.7%) were found. 3. It was presented 8.5% of males and 5.4% of females took the vitamin regularly. (5) Health condition 1. In present evaluation for subject's health condition, very healthy (males 7.5% & females 6.0%) and poor health (males 2.0% & females 1.8%) were found in this study. 2. In present evaluation criterion for subject's health condition, the ability of adaptation on fatigue was appeared the most (males 35.9% & females 40.7%). 3. It was presented subjects have a digestive trouble (males 23.5% & females 33.1%) which were the best health problem in subjects. 2. A analysis of result of regular health test (1) Physique test 1. It was presented height (males 169.5cm & females 158.6cm) and body weight (males 65.9kg & females 53.1kg) were found in this study. 2. According to this study, obesity (males 11.2% & females 5.6%) and low body weight (males 8.8% & females 14.8%) were found in this study. 3. A high blood pressure subject (males 8.7% & females 2.5%) over than a contraction blood pressure 140mmHg and A high blood pressure subject (males 8.5% & females 1.9%) over than a expansion blood pressure 90mmHg were found in this study. (2) A blood test 1. Normal hemoglobin of subject (males 99.8% & females 62.3%) and 37.7% of females less than normal hemoglobin were found in this study. 2. 5.3% of males and 2.5% of females have greater than a concentration of glucose 140mg/dl, but there was anyone less than a concentration of glucose 50mg/dl. 3. The greater than 251mg/dl staff''s T.C.(males 7.1% & females 4.9%) and the less than 130mg/dl staffs' T.C.(males 2.0% & females 3.7%) were found in this study. 4. It was found males 5.3%, 11.6% & females 1.9%, 4.3% were presented greater than GOT and GPT 341U/L. (3) Hepatitis, Urinary Sugar, and Urinary Protein test 1. According to this study result, positive hepatitis was presented males (6.5%) and female(4.3%). 2. Urinary sugar is greater than +- males (1.8%) and females (2.4%) were found in this study. 3. Urinary protein is greater than +- males (1.6%) and females (1.8%) were found in this study. (4) Chest X-ray test 1. It was found male (1.6%) suffered from tuberculosis of the lungs. (5) Dental test 1. It was presented 77.3% of males and 88.9% of females was not existed the upper caries. Also, 75.7% of males and 90.7% of females was not existed the bottom caries. 2. It was presented 96.8% of males and 99.4% of females had the non-deficit of teeth in the upper part of teeth. Also, 93.9% of males and 98.1% of females had the non-deficit of teeth in the bottom part of teeth. 3. It was presented 19% of males and 3.7% of females have the periodontal disease. (6) General report and judgment 1. In general report, it was found 75.3% of males and 91.4% of females were the normal health condition. It was presented 9.1% of males and 4.9% of females were the liver disease, 4.9% of males and 1.2% of females were the sugar diabetes, 4.9% of males and 0.6% of females were the high blood pressure, and 1.4% of males and 1.9% of females were high arrest of bleeding. 2. In general judgment, it was presented 75.5% of males and 91.4% of females were the normal health condition. However, it was presented 17.8% of males and 7.4% of females were required high observation, 6.7% of males and 1.2% of females were required simple observation. As presented P. University staffs' lifestyle, it was found still many staffs have not right living habit. It is necessary to be wellness of lifestyle and satisfaction of life through correction of self responsibility and management in their life. Therefore, it is possible to live with healthy in better quality of life which is high quality of life and new concept of health were offered. Also, researcher expected the regular health examination be more practical contents than informal contents. Researcher recommended that it is necessary to support the university administration to be more flexibility of the regular health examination day than set the certain day of regular health examination and it required to create a way of using the P. university hospital.

Ku 밴드 안테나 급전시스팀 설계

문성익,이정란,양두영 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.2

In this paper. design of the antenna feed system for Ku-band is presented by TE_(mn)^(x) mode theory. The antenna feed system consists of diplexer combined with transmitting filter and receiving filter, OMT(Othogonal Mode Transducer) and polarizer. These filters are designed by the insertion loss method which is applied to the mode matching method. Matching elements in the inner waveguide set to reduce mismatching conditions on the discontinuity imposed by T-junction, so that a diplexer is optimized and has the best property. The optimum filter appeared characteristics that reflected power is about -2OdB in the receiving and the transmitting passband. The differential phase shift of the corrugated polarizer combined with OMT achieved 90°±1° within 14.0 - 14.5㎓ frequency-band. The maximum VSWR is only about 1.02 and axial ratio(AR) is about 1.01. The designed feed system has suitably separated between the polarized wave and the frequency bandwidth.

수정곡면 이중 옵셋 그레고리안 안테나 설계

문성익,양두영 제주대학교 산업기술연구소 1999 尖端技術硏究所論文集 Vol.10 No.2

In this paper, design procedure of the shaped dual offset gregorian antenna is proposed. The electric field distribution of aperture for main reflector is calculated by using taper factor and cos-q factor. The approximated equations of parameters are derived by the geometrical optics theory which determines the geometrical structure of the antenna. The results using the taper factor show characteristics that maximum side lobe level, spillover efficiency and illumination efficiency are -23dB, 89% and 89%. In case of the cos-q factor, they show that those are -27dB, 91% and 91%, respectively. Finally, the shaped dual offset gregorian antenna system by using cos-q factor with the improved characteristics has been designed.