本研究は，犯罪企図者と警備員による警備ゲーム問題を連続モデルとして分布をパラメトリックに表現することによって，両者の関係や警備戦略の分岐点を理論的に明らかにすることを目的とする．まず，被害抑制のための警備員の最適な資源配分の基本的性質を明らかにすることにより，警備の存在が犯罪の空間分布の多様性をもたらす可能性があることを示す．次に，犯罪分布の違いや警備員・犯罪者の人数を考慮した分析を行い，被害量をできる限り減らす観点から警備戦略の評価を行うことによって，適切な警備計画策定のための基本的知見を得る．そして，被害に遭う潜在的な可能性を持つターゲットの分布をコントロールすることが可能な場合に，被害を抑制するターゲットの分布の特徴を明らかにする．

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Various harmful insects exist in the land facilities and houses. An investigation research is widely done about the harmful insects. And an insecticide against them is variously developed, and a report about their effect is done. Harmful insects exist in a ship as well as on the land. However, a research report regarding them is a few. In Nagasaki University, we are getting rid of harmful insects in the training ship Kakuyo-maru in June or July every year. However, approximately 3 months later, an inhabitation number of a cockroach returned as it was before. Because 20 years elapsed after the Kakuyo-maru constructed, it offered a cochroach comfortable trace to exist in the ship. Then, we have executed a biannual cockroach extermination using bait medicine from 1997. We continue a state that there is hardly any cockroaches, i. e. cockroach index is less than 0.1 through the year. Consequently, it is thought that the using of bait medicine indicates a persistent effectively in a ship.

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