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電気などの重要インフラは武力紛争下で文民が生活していく上で必要不可欠なものである。しかしながら、現代の武力紛争では重要インフラが軍事的サイバー攻撃の対象となる事例が散見される。このような状況下で、文民による重要インフラのサイバー防御は武力紛争法上、どのように解釈されるのか。本稿では、文民による重要インフラのサイバー防御について、敵対行為への直接参加と文民保護規定の2つの視点から検討を行う。, Critical infrastructure such as electricity is essential for civilian life in armed conflict. However, in contemporary armed conflicts, there are many cases in which critical infrastructure is the target of military cyber attacks.Under such circumstances, how is cyber defense of critical infrastructure by civilians interpreted under the law of armed conflict? This paper examines the cyber defense of critical infrastructure by civilians from two perspectives: direct participation in hostilities and civil defense provision., 研究ノート(Note)

The middle convolution, introduced by Katz and developed by Dettweiler–Reiter, Oshima and others, defines an operation of reduction of linear ordinary differential equations with polynomial coefficients. In this paper, employing an idea of the exact steepest descent method proposed by Aoki–Kawai–Takei, we study how to determine the complete Stokes geometry and how to obtain the Borel summability of WKB solutions of a higher order linear ordinary differential equation with a large parameter when it is reduced to a second order equation via middle convolution. To show the practical usefulness of the method, we also investigate some concrete examples numerically.