Match!
Kenshi Sakai
Tokyo University of Agriculture and Technology
136Publications
13H-index
671Citations
Publications 137
Newest
#1Akira Ishibashi (TUAT: Tokyo University of Agriculture and Technology)H-Index: 1
#2Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
Trees produce pollen during specific times of the year. Pollen can induce pollinosis, a type of allergic rhinitis, in humans. In Japan, allergenic pollen is mainly dispersed from February to May. Using data collected at 120 observation sites managed by the Japanese Ministry of the Environment, we studied the annual patterns of airborne allergenic pollen. The allergenic pollen showed an alternating ON–OFF cycle, but the length of the cycle differed among regions. We used an in-phase/out-of-phase ...
1 CitationsSource
#1Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
#2Yoshinobu Hoshino (TUAT: Tokyo University of Agriculture and Technology)H-Index: 6
Last.Akira Ishibashi (TUAT: Tokyo University of Agriculture and Technology)H-Index: 1
view all 5 authors...
The population synchrony of tree seed production has attracted widespread attention in agriculture, forestry and ecosystem management. Oaks usually show synchronisation of irregular or intermittent sequences of acorn production, which is termed ‘masting’. Tree crops such as citrus and pistachio show a clear two-year cycle (period-2) termed ‘alternate bearing’. We identified period-3 dominant phase synchronisation in a population of Zelkova serrata. As ‘period-3’ is known to provide evidence to i...
Source
#1Masahisa Watanabe (TUAT: Tokyo University of Agriculture and Technology)
#2Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
Globally, tractor overturning accidents are a serious problem in agriculture. Tractor overturning not only threatens the life and health of famers but it can be major obstruction towards farm automation. In Japan, small tractors are used in harsh running environments, such as on rough farm roads, steep passage slopes, and narrow inclined side paths. Violent vibrations can occurs in the tractor and the wheels of the tractor sometimes depart from the ground. This phenomenon is called “bouncing” an...
Source
#1Awadhesh PrasadH-Index: 27
#2Kenshi SakaiH-Index: 13
Last.Yoshinobu HoshinoH-Index: 6
view all 3 authors...
Corrigendum: Direct coupling: a possible strategy to control fruit production in alternate bearing
Source
#1Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
#2Shrinivasa K. Upadhyaya (UC Davis: University of California, Davis)H-Index: 9
Last.Nina Sviridova (Meiji University)H-Index: 2
view all 4 authors...
Real-world processes are often combinations of deterministic and stochastic processes. Soil failure observed during farm tillage is one example of this phenomenon. In this paper, we investigated the nonlinear features of soil failure patterns in a farm tillage process. We demonstrate emerging determinism in soil failure patterns from stochastic processes under specific soil conditions. We normalized the deterministic nonlinear prediction considering autocorrelation and propose it as a robust way...
1 CitationsSource
#1Awadhesh PrasadH-Index: 27
#2Kenshi SakaiH-Index: 13
Last.Yoshinobu HoshinoH-Index: 6
view all 3 authors...
4 CitationsSource
#1Xujun Ye (Hirosaki University)H-Index: 2
#2Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
Abstract Alternate bearing or masting is a general yield variability phenomenon in perennial tree crops. This paper first presents a theoretical modeling and simulation study of the mechanism for this dynamics in citrus, and then provides a test of the proposed models using data from a previous 16-year experiment in a citrus orchard. Our previous studies suggest that the mutual effects between vegetative and reproductive growths caused by resource allocation and budgeting in plant body might be ...
1 CitationsSource
2 CitationsSource
#1Awadhesh Prasad (TUAT: Tokyo University of Agriculture and Technology)H-Index: 27
#2Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
We consider here the resource budget model of plant energy resources, which characterizes the ecological alternate bearing phenomenon in fruit crops, in which high and low yields occur in alternate years. The resource budget model is a tent-type map, which we study in detail. An infinite number of chaotic bands are observed in this map, which are separated by periodic unstable fixed points. These m bands chaotic attractors become m/2 bands when the period-m unstable fixed points simultaneously c...
3 CitationsSource
#1Nina Sviridova (TUAT: Tokyo University of Agriculture and Technology)H-Index: 2
#2Kenshi Sakai (TUAT: Tokyo University of Agriculture and Technology)H-Index: 13
Abstract This study sought to investigate the effect of tractor noise on the cardiovascular system of farm workers by the photoplethysmographic technique, which was used to derive signal reflecting features of cardiovascular system performance. Fourier transform and nonlinear time-series analysis methods, such as time-delay embedding and the Wayland test, were applied to the photoplethysmogram signal to analyze differences in cardiovascular system performance arising upon exposure to levels of t...
3 CitationsSource
12345678910