YAMAMURA Kohji

J-GLOBAL         Last updated: Nov 7, 2018 at 10:46
 
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Name
YAMAMURA Kohji
URL
http://cse.naro.affrc.go.jp/yamamura/index_e.html
Affiliation
National Agriculture and Food Research Organization
Section
Institute for Agro-Environmental Sciences,NARO
Job title
Senior researcher
Degree
Doctor of Agriculture(Kyoto University), Master of Agriculture(Kyoto University)

Research Interests

 
 

Research Areas

 
 

Academic & Professional Experience

 
Apr 1985
 - 
Mar 2016
researcher, National Institute for Agro-Environmental Sciences
 
Apr 2016
 - 
Today
researcher, Institute for Agro-Environmental Sciences, NARO
 

Education

 
 
 - 
1985
Graduate School, Division of Agriculture, Kyoto University
 
 
 - 
1983
Faculty of Agriculture, Kyoto University
 

Committee Memberships

 
Jan 2003
 - 
Mar 2013
The Society of Population Ecology  Associate editor
 

Published Papers

 
Appropriate use of Bayes (1763) estimation for obtaining maximum likelihood estimates
YAMAMURA Kohji
Japanese Journal of Conservation Ecology   23(1) 39-56   May 2018   [Refereed]
Ronald A. Fisher pointed out that Bayes (1763) estimation, which uses flat prior distributions, contains a fatal problem: we can create any estimate we like by changing the transformation used before the analysis. Therefore, Fisher proposed the ma...
Kohji Yamamura, Shigeto Fujimura, Takeshi Ota, Tetsuya Ishikawa, Takashi Saito,
Journal of Environmental Radioactivity      2018   [Refereed]
An equation was constructed to control the transfer factor of radiocesium to brown rice, to ensure a low risk (5%) of brown rice exceeding the standard limit (100 Bq/kg), by controlling the soil exchangeable K content.
Yamamura K, Mano J, Shibaike H
Quality Technology & Quantitative Management      Jul 2017   [Refereed]
A limit of detection (LOD) of analytical instruments is usually arbitrarily defined, for example, as the level of contamination at which the probability of detection (POD) is 50% or 95%. However, these definitions are ignoring the sampling uncerta...
YAMAMURA Kohji
Communications in Statistics - Simulation and Computation   45(6) 2122-2144   Sep 2016   [Refereed]
The conventional criteria for predictive model selection do not indicate the absolute goodness of models. For example, the quantity of Akaike Information Criterion (AIC) has meanings only when we compare AIC of different models for a given amount ...
YAMAMURA Kohji
Japanese Journal of Ecology   66(2) 339-350   Jul 2016   [Refereed]
When constructing state-space models, variables in the models are explicitly divided into observable and non-observable variables. Observation errors are appropriately handled in state-space models. Consequently, the parameters of models are estim...

Research Grants & Projects

 
Study on the temporal dynamics and spatial dispersal of insect populations
Ordinary Research