청보리 사일리지 및 목건초 급여가 엘크 사슴의 생산성 및 경제성에 미치는 영향

김상우,서상원,김동훈,김재환,김영신,김관우,윤세형,Kim, Sang Woo,Suh, Sang Won,Kim, Dong Hoon,Kim, Jae Hwan,Kim, Young Sin,Kim, Kwan Woo,Yoon, Sei Hyung 한국초지조사료학회 2013 한국초지조사료학회지 Vol.33 No.1

본 연구는 사슴의 조사료 원으로 엘크사슴에 대한 청보리 사일리지 급여가 사슴의 사료섭취량, 체중변화 및 경제성에 미치는 영향을 구명하기 위하여 실시하였다. 엘크사슴 21두를 공시하여 건초구, 청보리 사일리지구 및 건초+청보리 사일리지구로 나누어 농후사료를 3.7 kg 정량급여 하고 조사료는 자유채식 시켰으며, 그 결과는 다음과 같다. 엘크사슴의 일당증체량은 건초구, 청보리 사일리지구 및 건초+청보리 사일리지구 혼합구가 각각 0.26, 0.36 및 0.44 kg으로 건초+청보리 혼합구가 가장 높았고, 엘크사슴의 청보리 사일리지 일일섭취량은 6.25~9.00 kg (풍건) 범위였으며, DM 섭취량은 건초구, 건초+청보리 사일리지 혼합구 및 청보리 사일리지 순으로 높은 경향을 보였다. 녹용 생산량은 건초구, 청보리 사일리지구 및 건초+청보리 사일리지구가 각각 8,037, 7,713 및 8,585 g으로 건초+청보리 사일리지 혼합구가 가장 많았다. 3개 처리구간 일당증체량, 녹용생산량 및 사료섭취량은 사슴의 개체차가 심하여 통계적으로 유의성은 인정되지 않았지만(p>0.05) 증체량 및 녹용산량은 증가하는 경향을 보였다. 경제성 분석에서는 건초+청보리 사일리지 혼합구가 건초 및 청보리 사일리지 단독급여구보다 소득지수가 29~43% 높게 나타났다. 이상의 결과를 종합적으로 고려할 때 사슴의 조사료 원으로 청보리 사일리지는 기호성에서 건초를 대체할 만큼의 섭취량을 가지므로 이용가능성이 있었으며, 조사료 원으로 연중 공급이 가능하고, 경제적인 측면에서도 건초보다 유리하여 농가에서 사슴의 조사료 원으로 사용이 가능할 것으로 사료된다. 또한 청보리 사일리지 급여 시에는 청보리 사일리지 단독 급여보다는 청보리와 건초를 각각 50%씩 혼합 급여하는 것이 일당증체량, 증체, 녹용생산량 및 경제성에서 가장 바람직한 것으로 사료된다. This study was conducted to determine the effect of dietary whole-crop barley silage on the daily feed intake, daily weight gain, velvet antler yield and economic efficacy in elk during growth. A total of 21 elk (average BW 303 kg, 5 years old) were allotted randomly to three treatments. The three treatments were T1 (hay diet), T2 (whole-crop barley silage), and T3 (50% hay + 50% whole-crop barley silage). The average daily weight gain of T3 was higher than the others throughout the entire experimental period. The average daily feed intake of elk in decreasing order was as follows; T1>T3>T2. The velvet antler yield was higher in T3 group (8,585 g) compared with T1 (8,037 g) and T2 (7,713 g). However, there were no significant differences in the average daily feed intake, average daily weight gain, or velvet antler yield (p>0.05). In economic efficacy, T3 was gained about 29~43% more value than T1 or T2. In conclusion, the mixed feeding of 50% hay and 50% whole-crop barley silage was more effective than feeding hay of barley alone, in terms of average daily weight gain, velvet antler yield, and economic efficacy in elk.

볏짚 위주 사양 시 육성 흑염소의 농후사료 급여 수준이 발육, 사료이용성 및 경제성에 미치는 영향

김상우,김명직,김관우,김동훈,김영신,김현,서상원,박성복,Kim, Sang Woo,Kim, Myeong Jik,Kim, Kwan Woo,Kim, Dong Hoon,Kim, Young-Sin,Kim, Hyun,Suh, Sang Won,Park, Seong Bok 한국초지조사료학회 2013 한국초지조사료학회지 Vol.33 No.4

본 시험은 육성기 흑염소에 있어서 조사료원이 볏짚 위주일 때, 농후사료 급여 수준이 발육, 사료이용성 및 경제성에 미치는 영향을 구명하기 위해 실시하였다. 육성기 암컷 흑염소 40두를 공시하여 농후사료 급여수준을 체중의 1.5% (T1), 1.8% (T2), 2.1% (T3) 및 자유채식구(T4)로 나누어 급여 하였고 조사료원은 볏짚을 자유채식 하도록 하였다. 그 결과, 일당 증체량은 T1 (1.5%), T2 (1.8%), T3 (2.1%) 및 T4(자유채식)구가 각각 50.23, 60.37, 71.46 및 98.90 g으로 농후사료의 급여 수준이 높아질수록 유의하게 높았으며(p<0.05), 조사료인 볏짚의 사료 섭취량은 농후사료 급여수준이 증가 할수록 유의적으로 감소하는 결과를 보였다(p<0.05). 경제성 분석에 있어서 육성기 흑염소 경영비는 농후사료를 1.5%, 1.8%, 2.1% 및 자유 채식하였을 때 각각 46,704원, 49,998원, 54,701원 및 74,613원으로 농후사료의 급여수준이 증가할수록 경영비는 증가하였다. 이는 증체량에 있어서 T4(자유채식)구가 가장 많이 증가하였지만 T3 (2.1%)구보다 사료비에 있어서 두당 19,912원 더 많이 들었다. 이상의 시험 결과를 종합하여 고려할 때, 육성기 흑염소에 있어서 조사료 원이 볏짚 단용일 경우에는 농후사료를 2.1% 수준으로 급여하는 것이 가장 바람직할 것으로 사료 된다. This study investigates the effect of a feed concentrate on the growth performance, feed requirement, and rearing expenses of growing black goats. Forty female growing black goats were divided into four groups and fed rice straw (ad libitum) mixed with different levels of the feed concentrate: T1 (1.5%), T2 (1.8%), T3 (2.1%), and T4 (0%, control). The average daily weight gain (body weight per day) was as follows: T1 < T2 < T3 < T4 (50.23, 60.37, 71.46 and 98.90 g/day, respectively) (p<0.05). The intake of rice straw decreased significantly with increase in the concentrate level (p<0.05). Rearing expenses amounted to 46,704, 49,998, 54,701, and 74,613 won for feed concentrate levels of 1.5%, 1.8%, 2.1%, and ad libitum, respectively. Increase in feed concentrate levels led to an increase in rearing expenses. In conclusion, a concentrate level of 2.1% was determined to be idea for a rice-straw-based feed for growing black goats.

멀티코드 CDMA 시스템에서 비선형 왜곡에 대처하는 PAPR 저감 기법

김상우,김남일,김선애,서재원,유흥균,Kim Sang-Woo,Kim Namil,Kim Sun-Ae,Suh Jae-Won,Ryu Heung-Cyoon 한국전자파학회 2005 한국전자파학회논문지 Vol.16 No.12

Multi-code code division multiple access(MC-CDMA) 시스템은 다수의 코드 사용으로 인한 용량의 증가를 통해 다양한 속도, 다양한 품질의 서비스를 제공할 수 있다는 장점을 갖는다 그러나, 여러 개의 코드들이 합쳐지면서 PAPR(Peak to Average Power Ratio)이 크게 증가되므로 비선형 왜곡에 의한 시스템 성능이 크게 저하되고, 이를 위해 HPA(High Power Amplifier)에서 많은 양의 back-off를 해야 하므로 큰 전력 손실이 나타난다. 본 논문에서는 들어오는 정보 데이터에 상응하는, 즉 입력 데이터의 상관 관계에 의한 constraint code의 삽입함으로써 PAPR을 효율적으로 낮출 수 있는 방법을 제안한다. PAPR 저감 효과는 사용된 constraint code의 길이와 index에 의존하며, PAPR 저감 효과와 constraint code의 길이 사이에 trade-off가 존재한다. HPA 및 AWGN 채널을 고려한 시뮬레이션 결과에서, 1) Input back-off 없이 가능한 모든 constraint code를 사용해 신호를 선택한 경우와 2) 약간의 input back-off와 몇 가지 constraint code만을 이용해 신호를 선택한 경우에서, BER성능이 선형 HPA를 사용한 OFDM의 성능과 거의 같게 나타남을 확인할 수 있다. Multi-code code division multiple access(MC-CDMA) has been proposed for providing the various service rates with different quality of service requirement by assigning multiple codes and increasing the capacity. However, it suffers from the serious problem of high peak to average power ratio(PAPR). So, it requires large input back-off, which causes poor power consumption in high power amplifier(HPA). In this paper, we propose a new method that can reduce PAPR efficiently by constraint codes based on the opposite correlation to the incoming information data in MC-CDMA. PAPR reduction depends on the length and indices of constraint codes in MC-CDMA system. There is a trade-off between PAPR reduction and the length of constraint codes. From the simulation results, we also investigate the BER improvement in AWGN channel with HPA. The simulation results show that BER performance can be similar with linear amplifier in two cases: 1) Using exact constraint codes without input back-off and 2) a few constraint codes with small input back-off.

간 경화도 측정을 위한 3.0T 자기공명 탄성계수 영상의 유용성에 대한 고찰 : 확산계수 영상 및 T2 강조 영상과의 비교

김상우,강충환,김성호,김경수,김순배,Kim, Sang-Woo,Kang, Chung-Hwan,Kim, Sung-Ho,Kim, Kyung-Soo,Kim, Soon-Bae 대한디지털의료영상학회 2012 대한디지털의료영상학회논문지 Vol.14 No.1

The purpose of this study is to evaluate the mutual relations by measuring SNR from T2 weighted image and ADC values on the basis of the stiffness values from liver tissues. This study was conducted that total 37 people(23 of males and 11 of females) were taken the liver MRI examination and average age was $54.5{\pm}12.7$ years old. The equipment was MAGNETOM Skyra 3.0T (SIEMENS, Erlangen, Germany) and 32 channel body-array coil. The examination were conducted with HASTE T2 weighted image by axial plane, Spin-echo EPI (echo planner image) DWI (b-value = 800) and Magnetic resonance elastography. The ROIs (region of interest: 200-300 $mm^2$) were established on the basis of the first axial stiffness image corresponded 95% confidence interval from axial stiffness image and then were measured values. After drawing the grid lines, signals were measured SNR from T2 weighted image and ADC values on the same locations that were analysed other 3 planes respectively. The results were showed correlation (0.057) that were increased to SNR from T2 weighted image by increasing stiffness value that no significant difference statistically p = 0.003. Other results were showed correlations (-0.301) that were decreased to ADC values by increasing stiffness values that no significant difference statistically p = 0.088. In the 3.0T equipment, the results may be error in much the same fashion as the 1.5T from ADC values by evaluation of fibrosis stage. However, Magnetic resonance elastography would be useful method that is used to diagnose exactly liver fibrosis stages in the 3.0T.

74. Clinical study of Malingant Tumors in the Biliary Tract

김상우,김인철,김희규 (Sang Woo Kim,In Chul Kim and Hee Kyu Kim) 대한외과학회 1980 대한외과학회 학술대회자료집 Vol.- No.-

R-BENCH TOOL을 이용한 상용차용 정전용량 방식의 연료 센서의 소프트웨어 검증 평가

김상우,이주형,손정현,이수호,이덕진,Kim, Sang Woo,Lee, Ju Hyoung,Son, Jung Hyun,Lee, Soo Ho,Lee, Duck Jin 대한기계학회 2014 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.2 No.1

최근 차량이 기계장치 중심에서 전기전자 장치 중심으로 발전하고 있으며, 상용차량 역시 전기전자 장치가 증대되고 있다. 정전용량 방식의 연료 센서는 연료의 레벨을 정전용량 값으로 측정하여 센서 내 MCU 를 통해 연산과정을 거쳐 최종 전압값의 신호로 출력해 주는 센서이다. 기존의 세라믹 저항을 이용한 센서보다 내구성이나 연료 측정 정확성이 향산된 진보된 센서로 센서에 대한 소프트웨어 검증을 위하여 가변 커패시터 보드를 제작하여 R-BENCH TOOL 을 통해 test case 를 자동으로 생성시킨 후 연료 센서의 소프트웨어 검증을 시도하였다. 또한 결론으로 98% 이상의 높은 소프트웨어의 신뢰도가 있음을 확인하였다. Recently vehicle development trend changes from machinery vehicle to the electrical and electronic devices. As well the electrical and electronic devices commercial vehicles are increasing more than machinery system. The capacitance fuel sensor is a sensor that, by measuring the capacitance value of fuel level sensor MCU operating for the final voltage value of the signal output. That is increasing durability and fuel measurement accuracy more than conventional ceramic resistor type. For Sensor software verification R-BENCH TOOL generated test case automatically. We make the programmable Capacitor board for test. And it was confirmed that more than 98% of the high reliability of the software.

최대가능홍수량 적용에 따른 농업용 저수지의 수문학적 안정성 분석

김상우,맹승진,Kim, Sang-Woo,Maeng, Seung-Jin 한국관개배수위원회 2010 한국관개배수논문집 Vol.17 No.2

This study re-exams hydrologic stability on spillway outlet capacity of agricultural reservoirs using hydrologic data with current rainfall condition instead of project hydrologic data applied at design on Backgok reservoir located in Chungbuk province. It is concluded that Backgok reservoir is not hydrologically stable and therefore structural measures including the extension of spillway and non structural measures should be taken. Continuous basic plan for river maintenance including additional bank reinforcement to bottom river shall be carried out. Due to high peak flood with more than 290% compared to 200 year frequency probability flood which was design standard of the past in view of the results of calculating PMF according to revised design standard for reservoirs, there could a problem for securing rationality in case of applying PMF with design flood. Therefore, hydrological stability, construction, and maintenance cost shall be synthetically studied and reasonal application shall be made if the decision is made on applying PMF with design flood.

Controlled Growth of Two-Dimensional ZnO Nanowalls by Thermal Chemical Vapor Deposition

김상우,Sam-Dong Lee,Hyun-Kyu Park,김경국,박래만,Sang-Hyeob Kim,Sunglyul Maeng 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.III

Morphology and crystallographic properties of two-dimensional ZnO nanowalls epitaxially grown on catalytic Au-deposited GaN/$c$-plane sapphire substrates in a thermal chemical vapor deposition process were studied as a function of growth temperature. Vertically well-aligned ZnO nanowall networks with different wall size and morphology were formed at 880, 900 and 920 $^\circ$C, respectively. We observed that the ZnO nanowall networks were of a single-crystalline structure and showed a perfect epitaxial relation with the catalytic Au and the GaN substrate in high-resolution electron microscopy and synchrotron X-ray scattering experiments. It was found that the crystal quality of ZnO nanowall and catalytic Au was improved with increasing growth temperature in X-ray powder diffraction measurements. The room-temperature photoluminescence spectrum showed a quite strong and sharp ultraviolet emission as well as relatively weak deep-level emission, indicating good optical properties of the ZnO nanowall samples in this work.

신화아연 1차원 나노구조물 기반 차세대 에너지 하베스팅 소자 기술개발 동향

김상우,Kim, Sang-U 한국전기전자재료학회 2008 전기전자재료 Vol.21 No.5

Route from ZnO Thin Films to Nanostructures on Si Substrates by Metal Organic Chemical Vapor Deposition

김상우,Han-Ki Kim,김경국,Shizuo Fujita,Soon-Wook Jeong 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.III

ZnO thin films and nanostructures were grown on Si substrates in a metal organic chemical vapor deposition (MOCVD) process as a function of growth conditions including source flow rates and growth temperatures. ZnO thin films with smooth surface morphology were grown in growth conditions with low zinc source flow rates and high growth temperatures. On the other hand, the surface morphology of thin films became dramatically rough on increasing the flow rate of the zinc source, resulting in the formation of various kinds of nanostructures such as nanorods, nanotowers, and nanocactuses, depending on the MOCVD growth temperature. This result is mainly due to the strong tendency of ZnO toward a three-dimensional (3D) growth mode with higher flow rates of the zinc source in a MOCVD process, indicating that a route from thin films to nanostructures relies on the 3D growth behavior of ZnO.