TY - JOUR
T1 - Dynamics of water–energy–food nexus methodology, methods, and tools
AU - Endo, Aiko
AU - Yamada, Makoto
AU - Miyashita, Yuji
AU - Sugimoto, Ryo
AU - Ishii, Akira
AU - Nishijima, Jun
AU - Fujii, Masahiko
AU - Kato, Takaaki
AU - Hamamoto, Hideki
AU - Kimura, Michinori
AU - Kumazawa, Terukazu
AU - Qi, Jiaguo
N1 - Funding Information:
The authors would like to acknowledge financial support from the National Aeronautics and Space Administration's Land Cover and Land Use Program grant (NNX15AD51G) and Interdisciplinary Research in Earth Science grant (80NSSC17K0259). This work was also supported by Program 2, ?Fair Use and Management of Diverse Resources,? funded by the RIHN. Table 2 was created based on the results of the RIHN project [grant number 14200097]. The authors also would like to particularly thank User Local, Inc. for their support for the keyword analysis.
Funding Information:
The authors would like to acknowledge financial support from the National Aeronautics and Space Administration's Land Cover and Land Use Program grant ( NNX15AD51G ) and Interdisciplinary Research in Earth Science grant ( 80NSSC17K0259 ). This work was also supported by Program 2, ‘Fair Use and Management of Diverse Resources,’ funded by the RIHN . Table 2 was created based on the results of the RIHN project [grant number 14200097 ]. The authors also would like to particularly thank User Local, Inc. for their support for the keyword analysis. Appendices A.1. The following equation describes the expression used to calculate TF: (1) t f ( t , f ) = n t , d ∑ S ∈ d n s , d where t f ( t , f ) is the term frequency of term t in document d , n t , d is the word frequency of term t in document d , and ∑ s ∈ d n s , d is the sum of the term frequencies for all terms in a document d . The following equation describes the expression used to calculate the IDF: (2) i d f ( t ) = log N d f ( t ) + 1 where i d f ( t ) is the inverse document frequency of term t , N is the total number of documents, and df(t) is the number of documents that contain term t . A.2. Keyword trends in the 25 reviewed articles published between 2017 and 2019 (unit: %). Image 1 A.3. The word occurrence ratio in the 25 reviewed articles published between 2017 and 2019 was calculated using the following equation: (3) R a t i o ( c i x j ) = z c i x j ∑ k = 0 n z c i x k ∗ 100 where C ∈ { c o , c 1 … c n } is a set of categories, X ∈ { x 0 , x 1 , ⋯ x m } is a set of words, and z c i x j ( 0 < i < n , 0 < j < m ) is the word occurrence ratio x j , in category c i .
Publisher Copyright:
© 2019 The Author(s)
PY - 2020/2
Y1 - 2020/2
N2 - A review was conducted to understand the current status of the water–energy–food nexus, focusing on its methodology, and the process through which the nexus approach has academically and geographically expanded across and synthesized more than one discourse, discipline, and domain via its methodology as interdisciplinary and integrated approaches. The review article types were categorized into five groups and comprehensively analyzed. Various indicators to assess the nexus methods and tools, reported in previous studies, that can be used to select appropriate methods and tools for methodology and research designs. The studies in the reviewed articles were characterized by various stages of interdisciplinary research. In addition, the water–energy–food nexus initiatives, which generalize methods and tools, applying mixed methods to the replicability of specific case studies, were discussed based on the findings.
AB - A review was conducted to understand the current status of the water–energy–food nexus, focusing on its methodology, and the process through which the nexus approach has academically and geographically expanded across and synthesized more than one discourse, discipline, and domain via its methodology as interdisciplinary and integrated approaches. The review article types were categorized into five groups and comprehensively analyzed. Various indicators to assess the nexus methods and tools, reported in previous studies, that can be used to select appropriate methods and tools for methodology and research designs. The studies in the reviewed articles were characterized by various stages of interdisciplinary research. In addition, the water–energy–food nexus initiatives, which generalize methods and tools, applying mixed methods to the replicability of specific case studies, were discussed based on the findings.
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U2 - 10.1016/j.coesh.2019.10.004
DO - 10.1016/j.coesh.2019.10.004
M3 - Review article
AN - SCOPUS:85075988739
VL - 13
SP - 46
EP - 60
JO - Current Opinion in Environmental Science and Health
JF - Current Opinion in Environmental Science and Health
SN - 2468-5844
ER -
