2 0 0 0 「富岳」による新時代の大アンサンブル気象・大気環境予測
1 0 0 0 OA 雇用保障の法と経済学
- 著者
- 八代 尚宏
- 出版者
- 日本法哲学会
- 雑誌
- 法哲学年報 (ISSN:03872890)
- 巻号頁・発行日
- vol.2008, pp.37-49, 2009 (Released:2021-12-29)
The law for protecting long-term employment in Japan is mainly done by case laws, which are implicitly based on common practices of large firms in the period of high rate of economic growth in the past but are not appropriate under the stagnated economy since the early 1990s. This paper first analyzes the implicit assumptions of judges to settle the disputes for dismissals such as monopolistic labor demand by a firm, homogeneous quality and preference of workers, but they are necessarily applicable to the actual labor markets. Also, there is a trade-off of interests concerning too strict employment regulations between those who are already employed and those who seek for jobs, accounting for possible impacts on the employment behavior of Japanese firms. Secondly, the framework of desirable rules for dismissals in recession is suggested. This is to put an emphasis on procedures, rather than the judgment on adequacy of the dismissals. The procedure could be pecuniary compensations, the company's assistance to the workers for finding new jobs based on the consent of the labor union. Finally, in the Japanese labor market where the long-term employment commitment and seniority-based wages are prevalent, it is rather difficult to move from a firm to another either voluntary or involuntary. Thus, the principle of equal pay for equal work in the flexible labor markets would be an important safety-net for workers facing risks of bankruptcy or laying-off.
1 0 0 0 日本上空における対流圏水素濃度の時空間分布とモデルによる再現
大気中水素(H<SUB>2</SUB>)はメタンに次いで濃度の高い反応性気体であり、土壌細菌による消費を主な吸収源とすることから、陸域-大気間の相互作用を研究する上で有用なトレーサーである。本研究において観測された日本上空のH<SUB>2</SUB>濃度は明瞭な鉛直勾配を示し、地表付近での大きな季節変動が明らかになった。全球三次元化学輸送モデルCHASERを用いたH<SUB>2</SUB>濃度の計算結果はおおむね観測結果を再現するが、北半球で秋から冬にかけて過小評価の傾向を示し、より詳細な吸収過程の表現を必要とすることが示された。
1 0 0 0 ジョブ間データ転送方式の検討
- 著者
- 齋藤 智之 石川 裕 Gerofi Balazs 三好 建正 大塚 成徳 富田 浩文 西澤 誠也 八代 尚
- 出版者
- 一般社団法人情報処理学会
- 雑誌
- 研究報告ハイパフォーマンスコンピューティング(HPC)
- 巻号頁・発行日
- vol.2014, no.2, pp.1-6, 2014-02-24
実時間ゲリラ豪雨予測システムを実現するために,100 ケースの 30 秒アンサンブル気象シミュレーション結果と 30 秒毎の最新気象観測データを同化し,その結果から 30 分後の気象予測をする.将来の並列計算機において,5000 プロセスから構成される気象シミュレーションジョブと 5000 プロセスから構成されるデータ同化ジョブの間でデータ転送が行われると見積もっている.ファイル渡しによる非効率なデータ転送ではなく,ファイル I/O API を維持しながら 2 つのジョブのプロセス間で効率の良いデータ転送を提供する File I/O Arbitrator を提案する.We are designing and developing an innovative real-time severe weather forecasting system that updates 30 minute later severe weather conditions every 30 second. In this system, the results of 100 cases of 30 second ensemble numerical weather simulations and observational data obtained by modern weather equipment's are assimilated every 30 minute, and 30-second weather prediction is performed using the assimilated data. In a next generation supercomputer we assume, it is estimated that data are transferred between 100 case ensemble simulations running on 5000 processes and an assimilation job running on 5000 processes in order to meet required realtimeness in terms of computation. Shortening the execution time of simulations and assimilation, the execution time of transferring data via files becomes bottleneck. In this paper, efficient data transfer middleware called file I/O arbitrator is proposed in order to eliminate exchanging files.