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Findings on Some Distinct Aspects in Multi-national Consortium Supply Contracts-Taking International Submarine Cable System Construction Projects as an Example-
Get PDFグローバル化が進む現代において、国と国とをつなぐ通信ネットワークの分野でも更なるグローバル化が進展している。国際通信手段の代表である海底ケーブルは、異なる国々を結ぶ通信手段として重要性を増している。国際海底ケーブル建設プロジェクトは、多くの場合その工期が2年から3年以上にも及ぶ大規模なものであり、建設や所有に伴うリスクの分散や、国によって異なる制度や規制への効率的な対応といった目的から、このようなインフラの所有者となる事業者たちは多国間コンソーシアムを形成することも少なくない。本稿ではこのような多国間コンソーシアムとの供給契約の特徴と注意すべき点について考察する。International telecommunication networks keep globalizing as globalized business and economy keep growing. International submarine cables are telecommunications infrastructure vital to today’s digitally connected world. These systems physically connect two or more different countries via fiber optic cable and often require two to three years to be constructed. These kinds of cable systems are sometimes owned by a single entity but historically many have been owned and operated by consortia made up of telecommunications service providers of different nationalities, mitigating risks associated with ownership and construction while also addressing regulatory requirements of cable landing countries. This paper highlights some of the distinct aspects of supply contracts for consortia-owned international submarine cables when compared with those for single-owner cables
Activation of Anionic Redox for Stoichiometric and Li-Excess Metal Sulfides through Structural Disordering: Joint Experimental and Theoretical Study
Get PDFExtensive research efforts have been dedicated to Li-excess compounds with anionic redox reaction as potential high-capacity positive electrode materials for Li-ion battery applications. The origin of activation on anionic redox is still under debate, and a unified understanding is necessary, especially for sulfide-based compounds without conductive d electrons. Herein, joint experimental and theoretical study is conducted for Li-excess and stoichiometric compounds with different crystal structures, cation-disordered rocksalt, and cation-ordered layered structures. In contrast to the understanding of Li-excess oxides, sulfide-based compounds with ordered layered structures are electrochemically less active compared with the materials with disordered structure. Theoretical study reveals that a unique local structure for a sulfide ion coordinated by 6 Li ions, SLi6 configuration, is formed, which can be found only for the disordered structure and not for the layered structure. The unique local structure triggers electron delocalization for sulfide 3p orbitals, leading to superior electronic conductivity, as experimentally evidenced, and thus anionic redox is successfully activated. Furthermore, such nonuniform local structures lead to easier structural distortion and efficient S–S dimerization, and even trimerization (S32–), upon delithiation. Although sulfide-based compounds as battery electrode materials suffer from dissolution after oxidation, this practical problem is effectively mitigated by the use of highly concentrated electrolyte solutions with fewer free solvent molecules, leading to superior reversibility for anionic redox. The insights derived can guide the development of high-energy electrode materials with anionic redox with or without transition metal ions possessing conductive d electrons
低合金鋼の微細組織と疲労強度に及ぼす浸窒熱処理の影響
Get PDF横浜国立大学Yokohama National University博士（工学）Doctor of Engineeringこの学位論文の全文は、中央図書館で平日17時までに申請することで閲覧が可能です。The full text of this thesis is available for viewing at the Central Library upon request by 5:00 p.m. on weekdays
Application of membrane filtration and classification technology to colloidal quantum dot fabrication processes
Get PDF横浜国立大学博士（工学）Doctor of Engineeringこの学位論文の全文は、中央図書館で平日17時までに申請することで閲覧が可能です。The full text of this thesis is available for viewing at the Central Library upon request by 5:00 p.m. on weekdays
Explicit bounds for the norms of ideals of central simple algebras over number fields
Get PDF横浜国立大学博士（理学）Doctor of Scienceこの学位論文の全文は、中央図書館で平日17時までに申請することで閲覧が可能です。The full text of this thesis is available for viewing at the Central Library upon request by 5:00 p.m. on weekdays
