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Heterosis for vegetative stage cold tolerance in rice
Huhn Pal Moon(文憲八),알 엔 카우(R.N. Kaw),Jong Doo Yae(芮鍾斗) 한국육종학회 1987 한국육종학회지 Vol.19 No.4
Heterosis for low-temperature tolerance at the vegetative growth stage was studied in ninety F₁ rice hybrids. The F₁s were transplanted in 2.25-m long single row plots, replicated thrice and were subjected to cold water stress at 17℃ and 20℃, in separate blocks, starting from 20 days after transplanting until maturity. Leaf-discoloration was used as a measure of cold tolerance at the vegetative stage. Average mid-parent heterosis of - 40.7% and high-parent heterosis of - 61.9% was recorded in the japonica/indica group of crosses as compared to -18.6% and -26.0%, respectively, in the indica/indica group. Heterosis for cold hardiness was greater for the japonica/indica group of hybrids with 95.8% hybrids showing significant negative mid-parent heterosis and 100% high-parent heterosis (low leaf-discoloration scores mean high cold hardiness). In indica/indica group, only 6.3% had lower scores in japonica/indica group, suggesting some involvement of complimentary gene action in the inheritance of cold hardiness. Barkat/IR 29506, Shimokita/IR 29506 and Suweon 235 /IR 29506 from the japonica/indica group exhibited better cold tolerance than their respective cold tolerant parents. The correlation between mid-parent value and hybrid perfromance was of sufficient magnitude to indicate that prediction of hybrid performance from parental value should prove effective.
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이미지복잡도 측정 기술을 활용한 사용자 인터페이스의 시각복잡도 평가
김헌(Huhn Kim),임종혁(Jonghyeok Im),권재용(J.Y. Kwon),심현순(H.S. Shim),이지수(J.S. Lee),조화영(H.Y. Jo),민나례(N.R. Min),손지택(J.T. Son) 한국HCI학회 2013 한국HCI학회 학술대회 Vol.2013 No.1
운전 중 자동차 AVN (Audio, Video, Navigation)을 눈으로 보고 손으로 조작하는 것은 운전자의 시선을 뺐고 주의력을 도로에서 벗어나게 하여 교통사고를 유발하는 주요한 요인 중의 하나이다. 특히 최근에는 많은 기능들이 들어가면서 AVN 화면의 복잡도는 더욱 증가하고 있다. 일반적으로 AVN 의 시각복잡도가 증가할수록 그 속에서 정보를 탐색하거나 조작하는데 걸리는 시간은 더 길어질 것으로 예측할 수 있다. 따라서 화면의 시각복잡도를 정량적으로 측정하여 운전에 위협이 되지 않는 수준의 적정 복잡도를 정의하는 것은 AVN 인터페이스 설계에 있어 중요한 이슈로 대두되고 있다. 본 연구에서는 기존의 다양한 연구에서 유용한 것으로 밝혀진 이미지 (예. 사진, 웹 사이트) 복잡도 측정 모델이나 척도들을 AVN 의 시각복잡도 평가에 활용 가능한지를 알아보기 위한 실험을 수행하였다. 또한 시각복잡도에 영향을 미치는 인터페이스 설계요소들이 무엇인지를 조사하였다. 실험 결과, 엔트로피 기반의 복잡도 모델들과 화면밀도를 반영한 척도 등이 AVN 의 시각복잡도 점수와 높은 상관관계를 보였다. 하지만 이들 모델들은 익숙한 요소들 (예. 키패드)에 대한 지각의 하향식 처리를 반영하지 못한다는 한계가 있었다. Watching and operating in-vehicle AVN (Audio, Video, Navigation) during driving is one of main causes of car accidents. Recently, complexity of AVN is more increasing as many functions are being included. In general, it is expected that the time to find information and operate a function may be increasing as AVN becomes visually more complex. Therefore, measuring visual complexity quantitatively and determining its proper levels are one of important issues in designing user interfaces of AVN. In this study, an experiment was performed to investigate the applicability of existing models or measures for evaluating image complexity (e.g., pictures) in the visual complexity of AVN. Through the experiment, user interfaces’ elements affecting the complexity were also probed. The experimental results showed that entropy- and density-based models could closely predict subjective visual complexity of AVN. However, those models had the limitation that they did not consider perceptual top-down processing on familiar elements (e.g., keypads).
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Estimates of combining ability for vegetative stage cold tolerance in rice
알 엔 카우(R. N. Kaw),로미 엠 비스페라스(R. M. Visperas),Huhn Pal Moon(文憲八),Jong Doo Yae(芮種斗) 한국육종학회 1986 한국육종학회지 Vol.18 No.1
Ninety F₁ rice hybrids were evaluated for combining abilily for low-temperature tolerance at the vegetative growth stage. Evaluation was done by subjecting the plant to 17℃ and 20℃ water temperatures in separate blocks from 20 days afler transplanting to maturity. Combining ability analysis showed the predominance of additive gene action. The Japonica parents viz. Shimokita, K48, SR5204-91-4-1, Stejaree 45, Barkat and K332 were good donors for vegetative stage cold tolerance. The best sca combinations involved both high and low general combiners. Parental performance per se was a good indicator of gca effects of the parents.
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Estimates of combining ability for cold tolerance at reproductive stage in rice
램 나스 카우(Ram Nath Kaw),Huhn Pal Moon(文憲八),Jong Doo Yae(芮鍾斗),로미 엠 비스페라스(R.M. Visperas) 한국육종학회 1989 한국육종학회지 Vol.21 No.3
Ninety F₁ rice hybrids, produced by crossing 15 rice cultivars having lowtemperature tolerance at different growth stages with 6 high yielding elite IRRI cultivars, were evaluated for combining ability for reproductive stage cold tolerance. Evaluation was done by subjecting the plants to 17℃ and 20℃ water temperatures, in separate blocks, from 20 days after transplanting to maturity. Both general (GCA) and specific (SCA) combining ability variances were significant, with estimates of GCA being larger for all traits, showing predominance of additive type of gene action. The indica parents viz. Samgangbyeo, Suweon 287, Shoa-Nan-Tsan, K 39-96, China 988, IR 9202, Leng Kwang, IR 7167 and IR 15889 proved to be good donors for reproductive stage cold tolerance. Parental performance per se was a good indicator of general combining ability effects of the parents, but no association was observed between per se performance of the crosses and their specific combining ability effects.
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