H
Hajime Kumagai
Researcher at Kyoto University
Publications - 73
Citations - 531
Hajime Kumagai is an academic researcher from Kyoto University. The author has contributed to research in topics: Neutral Detergent Fiber & Dry matter. The author has an hindex of 11, co-authored 64 publications receiving 379 citations.
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Journal ArticleDOI
Application of Overall Dynamic Body Acceleration as a Proxy for Estimating the Energy Expenditure of Grazing Farm Animals: Relationship with Heart Rate
Masafumi Miwa,Kazato Oishi,Yasuhiro Nakagawa,Hiromichi Maeno,Hiroki Anzai,Hajime Kumagai,Kanji Okano,Hisaya Tobioka,Hiroyuki Hirooka +8 more
TL;DR: The results indicated that ODBA is a good proxy for estimating the energy expenditure of grazing farm animals across species and breeds, and the utility and simplicity of the procedure with acceleration loggers could make the accelerometry technique a worthwhile option in field research and commercial farm use.
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Effects of feeding polyphenol-rich winery wastes on digestibility, nitrogen utilization, ruminal fermentation, antioxidant status and oxidative stress in wethers
TL;DR: The results indicated that winery sediment and grape pomace could alter nitrogen metabolism and/or act as new antioxidants for ruminant feeds possessing antioxidant activities.
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Behavior classification of goats using 9-axis multi sensors: The effect of imbalanced datasets on classification performance
TL;DR: The results suggest that, in addition to tri-axial acceleration, tri-AXial magnetism is useful for classifying lying, standing, and grazing activities of ruminants and that equalizing the number of data for each behavior is important to correctly assess the predictive accuracy of behavioral classifications, particularly for the behavior with low prevalence.
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Stable carbon and nitrogen isotope analysis as a tool for inferring beef cattle feeding systems in Japan
Yuta Yanagi,Hiroyuki Hirooka,Kazato Oishi,Yousuke Choumei,Hiroshi Hata,Mamoru Arai,Masayuki Kitagawa,Takafumi Gotoh,Sunao Inada,Hajime Kumagai +9 more
TL;DR: The results suggested that stable carbon and nitrogen isotope analysis for cattle meat and hair could be used to trace the feeding histories of cattle in Japan, and that hair samples would be used as an alternative to meat.
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Application of the modified feed formulation to optimize economic and environmental criteria in beef cattle fattening systems with food by-products
TL;DR: In this paper, a simplified ration optimization method was applied to a beef cattle fattening system to evaluate the utilization of food by-products under various situations, and the method was extended to reduce feed costs and nitrogen and phosphorus excretions.