完全非線形方程式の弱ハルナック不等式とその応用

要約のみTohoku University小池茂昭課

Prioritizing Invasive Species Management in the Carlsbad Hydrologic Unit

The Carlsbad Hydrologic Unit contains diverse habitats that support a large number of rare and threatened plant and animal species. These habitats are at risk from infestations of invasive plant species, which can take over habitats displacing native plants and associated wildlife. San Elijo Lagoon Conservancy (SELC) protects native habitats by performing conservation, habitat restoration, and invasive species mitigation. The Conservancy needed to focus its resources on targeting the invasive species infestations that pose the greatest risk to native habitats and associated wildlife while working with a limited budget. The project created a user-friendly and repeatable tool for SELC to prioritize invasive species infestations for mitigation. SELC is a non-profit organization with limited resources and wanted to focus on the activities that maximize their resources to conserve native habitats. The project was accomplished by developing an ArcGIS tool that ranks known invasive species infestations from low to high priority based on their potential risk to native habitats, probability to spread due to surrounding disturbances and transport mechanisms, and their location accessibility. This tool was developed using Python and ArcGIS. An analysis using the tool ranked 112 out of 12,504 known invasive species infestations ranked as high priority locations for mitigation

The Ternary Object: On Shinichiro Kurimoto’s Theory of Levels

This brief article has two objectives. First, it aims to provide a concise and lucid elucidation of Theory of Levels, an ontological system which the veteran Japanese thinker Shinichiro Kurimoto first invented in the early 1980s and has ever refined through the course of his decades-long career. Second, it intends to demonstrate with cogency that the discourse, albeit having been buried in oblivion for quite a while, carries a potential to help one to obtain a new perspective from which to freshly and positively interpret the existential dilemma between our natural sense that each one of us is a unique existence and the sheer reality that every one of us is merely a trivial strand of diverse larger structures. In order to achieve the objects, the argumentation proceeds in the following　order. Taking a survey of the papers in which Kurimoto’s Theory of Levels makes an appearance, the initial part confirms that, though it fis not the case that all academicians have completely disregarded the theory, as yet none of them has conducted a sufficiently comprehensive dissection thereof. Consulting, or rather reconstructing Kurimoto’s laconic account in his 2013 booklet entitled The Last Lecture of Shinichiro Kurimoto, the second part clarifies that the theoretical singularity of Theory of Levels consists in that it enables one to deem an existence to be a ternary object and thereby to get over the apparently insuperable quandary mentioned above. The third part concludes the discussion by indicating that decades after Kurimoto some researchers in natural science come to discuss from their own scientific perspective some views that hold a quite high degree of intimacy with Kurimoto’s theory. The authors of this paper are fully convinced that the Theory of Levels and/or fields upheld by the researchers mentioned in this paper are worth academic efforts to be scrutinized to close in on the ontological essence of mankind and every other existence alike. Keywords: Shinichiro Kurimoto, Theory of Levels, Japanese Though

The Duplex World: Keizaburo Maruyama’s Elaboration on Saussure’s Principle of the Arbitrariness of Linguistic Sings

This paper has two objectives. It intends, first, to elucidate Ferdinand de Saussure’s discourse on the arbitrariness of linguistic signs and, second, to expound Keizaburo Maruyama’s unique, epistemological thesis developed based on Saussure’s ideas. The argumentation goes as follows. After illustrating that the Swiss linguist’s case, having been understood too diversely, requires an accurate recapitulation and Maruyama’s texts have received little heed, the first section which proves Saussure’s original opinion entails that not only the relationship between a linguistic sign’s signifier and signified but a language’s classification system itself is absolutely contingent. The second section, scrutinizing Maruyama’s theory about our interpreting the world, shows its gist is humans construe the universe through the duplex articulation structure. The third, concluding section describes his view on music as another attribute of his thought, and closes the discussion by indicating that his texts, albeit written decades ago, can help us address today’s conundrums

Temperature Dependent Polarity Reversal in Au/Nb:SrTiO3 Schottky Junctions

We have observed temperature-dependent reversal of the rectifying polarity in Au/Nb:SrTiO3 Schottky junctions. By simulating current-voltage characteristics we have found that the permittivity of SrTiO3 near the interface exhibits temperature dependence opposite to that observed in the bulk, significantly reducing the barrier width. At low temperature, tunneling current dominates the junction transport due both to such barrier narrowing and to suppressed thermal excitations. The present results demonstrate that novel junction properties can be induced by the interface permittivity