• Title, Summary, Keyword: Wether

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Wether Conditions for Aerial Photography (항공사진촬영을 위한 국내 기상자료 분석)

  • 조우석;이성훈;최승식;황현덕;이하준
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • pp.313-318
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    • 2004
  • The quality of aerial photograph is closely connected with the change of wether conditions like as cloud cover, visibility, drifted snow and so on. To solve some problems caused by wether condition, the related organizations in advanced nations have presented some standards of wether condition for aerial photography. In domestic case, the NGI has presented some standards based on the internal specification of aerial photography and the table of monthly weather condition, but it is not enough to make the quantitative and objective standards on aerial photography specification. In this paper, we proposed a method which can reflect domestic weather condition and make accurate estimation of the average number of clear days in one year for aerial photography.

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Growth Performance, Carcass Characteristics and Meat Quality of Boer-Cross Wether and Buck Goats Grazing Marshall Ryegrass

  • Solaiman, S.;Kerth, C.;Willian, K.;Min, B.R.;Shoemaker, C.;Jones, W.;Bransby, D.
    • Asian-Australasian Journal of Animal Sciences
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    • v.24 no.3
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    • pp.351-357
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    • 2011
  • An experiment was conducted to evaluate the effects of castration on growth performance, carcass characteristics, and meat quality of goat kids. Fourteen Boer-cross buck and wether goat kids (n = 7; initial body weight (BW) $38.0{\pm}0.35\;kg$ and $34.8{\pm}0.35\;kg$, for bucks and wethers, respectively) were grazed on annual Marshall ryegrass (Lolium multiflorum Lam.) for 56 days. Body weights were recorded after 4 h withdrawal from feed and water for two consecutive days, every 2 wk. After d 56, animals were harvested and hot carcass weight (HCW), cold carcass weight (CCW), dressing percent (DP), kidney and pelvic fat (KPF), longissimus muscle (LM) area, back fat (BF), and other carcass parameters were measured. Day 0 BW was used as a covariate for analyses. However, bucks were heavier than wethers at d 15 (p = 0.09), 42 (p = 0.001) and 56 (p = 0.001). Bucks had higher ADG (146 vs. 74 g/d; p = 0.001), HCW (21.2 vs. 18.8 kg; p = 0.06) and CCW (20.3 vs. 17.9 kg; p = 0.04) when compared with wether goats. Dressing percentage (51 vs. 47%; p = 0.06), KPF (0.44 vs. 0.16%; p = 0.02) and BF (0.41 vs. 0.21 cm; p = 0.05) were higher in wethers vs bucks, respectively; however, USDA live or carcass grades were similar. Longissimus muscle tissue from wethers and bucks were similar in darkness ($L^*$) and redness ($a^*$), but wethers had more (p = 0.02) yellow tint ($b^*$). Palmitic (C16:0), stearic (C18:0) and oleic (C18:1) acids were higher (p = 0.001) in muscle tissue from wethers compared to bucks. The saturated fatty acid (SFA) and monounsaturated fatty acid (MUFA) contents of muscle tissue were lower (p = 0.001) for bucks with no difference in polyunsaturated fatty acids (PUFA). Longissimus muscle initial temperature was higher in bucks (p<0.04) and pH change post-mortem was similar for bucks and wethers. These results indicated that castration of young market goats reduced growth performance and produced carcasses with more fat and higher SFA.

NBC Hazard Prediction Model using Sensor Network Data (센서네트워크 데이터를 활용한 화생방 위험예측 모델)

  • Hong, Se-Hun;Kwon, Tae-Wook
    • Journal of the Korea Institute of Military Science and Technology
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    • v.13 no.5
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    • pp.917-923
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    • 2010
  • The local area weather information is very important element to estimate where the air-pollutant will flow. But the existing NBC hazard prediction model does not consider the local area weather information. So, in this paper, we present SN-HPM that uses the local area wether information to perform more accurate and reliable estimate, and embody it to program.

Co-existence of History of Mathematics and Modern Mathematics

  • Banihashemi, Saied Seyed Agha
    • Proceedings of the Korea Society of Mathematical Education Conference
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    • pp.261-267
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    • 2010
  • Both history of mathematics and education of mathematics is old subject. The question arises wether can these two important subjects can help each other or not. Unfortunately this idea made mathematics society into two groups; one has idea that history of mathematics can help education of mathematics and other group has idea that not only history of mathematics can not help education of mathematics but also it makes some confusion. In this article the author is going to do some comparison and take some conclusion that history of mathematics can make education of mathematics so active and interesting.

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Influence of Rumen Escape Starch on α-Amylase Activity in Pancreatic Tissue and Small Intestinal Digesta of Lambs

  • Xu, M.;Yao, J.H.;Wang, Y.H.;Wang, F.N.
    • Asian-Australasian Journal of Animal Sciences
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    • v.19 no.12
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    • pp.1749-1754
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    • 2006
  • Two slaughter experiments were conducted to determine the effects of rumen escape starch, by altering dietary starch concentration and corn particle size, on ${\alpha}$-amylase activity in the pancreas and the small intestinal digesta of lambs. In experiment 1, 18 wether lambs (28.5${\pm}$1.6 kg) were fed low, medium or high starch diets for 35 d and slaughtered. Dietary starch concentrations linearly increased rumen escape starch (p<0.05). Pancreatic ${\alpha}$-amylase activity was lower (p<0.05) in lambs fed the low starch diet. When expressed per gram of digesta, ${\alpha}$-amylase activity was lower in lambs fed the low starch diet. However, expressed as total activity, ${\alpha}$-amylase in the digesta was greater in lambs fed the medium starch diet. In experiment 2, 12 wether lambs (23.5${\pm}$0.3 kg) were fed diets with finely cracked corn, coarsely cracked corn and whole corn. These dietary treatments continued for 35 d before tissue collection. Rumen escape starch increased with increasing corn particle size (p<0.05). ${\alpha}$-amylase activity in the pancreas and the small intestinal digesta was significantly greater (p<0.05) in lambs fed the coarsely cracked corn. These data suggest that increasing rumen escape starch results in a quadratic increase in total ${\alpha}$-amylase activity in the pancreas and the small intestinal digesta. Maximum ${\alpha}$-amylase activity is reached when rumen escape starch is about 100-120 g/d in 25-30 kg lambs.

Differences in Reposition Error Among Male Compared With Female (20대 정상 성인 남녀의 요추 원위치 돌아오기 오류의 차이)

  • Kim Jae-Hun;Bae Sung-Soo
    • The Journal of Korean Physical Therapy
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    • v.15 no.4
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    • pp.82-89
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    • 2003
  • Although many current low back pain exercise incorporate proprioceptive training, very little research has been performed on proprioception of the low back. To determine wether reposition error is different in male than female. Eighteen young individuals took part in the research, seven male and eleven female. The 3-dimensional position of the lumbar was measured with a CMS70P. Reposition error was calculated as the absolute difference between the neutral position and return position. No significant differences in reposition error were found between male and female. No significant correlations were identified between reposition error and movement direction.

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The Study of Mother역s Nursing Need and Perceived Her Role During Puerperium Period (산욕기 산모의 어머니 역할에 대한 인식과 간호요구에 대한 연구)

  • 이경혜
    • Journal of Korean Academy of Nursing
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    • v.12 no.2
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    • pp.67-79
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    • 1982
  • The purpose of this study was undertaken to determine the nursing need of mother herself and her baby in puerperium period at home alone with percevied her role. It was hoped that this nursing information would help nurses plan effective for their nursing care. This study involved 100 postpartum mothers and the period for data collection was from May to July, 1982. The results of study were as follows; 1. The mother's mean age of 27.45, more than half of mother's was high school graduate, most of the mother have their religion, 78.4% was housewives, and 21.6% have occupation, Their mean marriage period was 30.2 years, 61% was nuclear family with 4.2 family members and primipara was higher then multipara. 2. Most mothers showed that positive attitude for their delivery and perceived higher their mother's role. 3. Mother showed more nursing need about infant(for example, bathing, meaning of crying) than herself. 4. There was a positive correlation between mother's education, wether or not their occupation, marriage periode, parity and mother's role and their nursing need.

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Output Control Simulation of PV-AF Generation System under Various Weather Conditions (다양한 기상조건하에서의 AF기능을 갖는 태양광발전시스템의 출력제어 시뮬레이션)

  • Seong, Nak-Gueon;Park, Min-Won;Yu, In-Keun
    • Proceedings of the KIEE Conference
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    • pp.1364-1366
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    • 2002
  • The Photovoltaic(PV) generation system is a promising source of energy for the future. Since the need for renewable energy has been increased, the research of PV generation system has also been progressed. Recently, cost down of PV generation system has been accomplished and practical technologies of the solar energy developed, Moreover, grid connected PV generation system are becoming actual and general. Operational technology of the grid connected PV generation system is being a hot issue. Power output of PV system is directly affected by wether conditions. When AC power supply is needed, power conversion by an inverter and a MPPT control are necessary. In this paper, for stability improvement of PV generation system. Active filter(AF) function is added to PV generation system, and simulations of PV-AF system under various weather conditions are performed.

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A Web-Based Information System for Irrigation Reservoir Operations (관개용 저수지 운영을 위한 Web 기반 정보시스템 개발)

  • 서춘석;박승우;강문성;강민구
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • pp.81-86
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    • 1999
  • A Web-based information system from the Korea Agricultural Water Use Laboratory AWUL, has been developed to provide with regional water management information and guidance for the operations of irrigation reservoirs through the World Wide Web(WWW). Twenty-six reservoirs are selected as the reference reservoirs for regional water management , and the real-time operation guide may be issued the grwoing seasons. The information available from the system includes the wether forecasting , drought analyses, and reservoir operation data for those reference sites. For a specific reservoir, the manager may access the system to obtain the water requriement, irrigation secheduling , and reservoir operations that fit best to the irrigation district.

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Optimum MPPT Control Period and Perturbation Voltage Analysis for PV Panel based on Real Wether Condition (실제 날씨에 대응한 PV 패널의 최적 MPPT 제어주기와 변량전압 분석)

  • Ryu, Danbi;Kim, Yong-Jung;Kim, Hyosung
    • Proceedings of the KIPE Conference
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    • pp.216-218
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    • 2019
  • 태양광발전시스템은 최대의 전력을 생산하기 위하여 PV 패널의 운전을 최대전력점에서 동작하게 하는 MPPT(Maximum Power Point Tracking) 제어가 필요하다. 그중 대표적인 방법인 P&O(Perturb and Observe) 알고리즘은 전류와 전압을 측정하여 계산된 전력의 값이 최대가 되는 전압의 운전점을 찾는다. 그러나 센서의 측정오차로 인하여 발전전력의 계산 및 전압의 제어에 불규칙한 오차가 발생하여 정확한 MPP 운전점을 찾지 못하는 문제가 발생한다. 본 논문에서는 전형적인 맑은 날씨와 흐린 날씨에서 취득한 일사량 데이터와 전류 및 전압 센서의 오차를 고려하여 P&O 알고리즘에 의한 전력 생산량을 시뮬레이션 한다. 시뮬레이션 분석을 통해 실제 날씨 및 센서허용오차 조건에서 MPPT 목표 효율을 극대화할 수 있는 최적의 MPPT 제어주기와 변량전압의 크기를 제시한다.

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