著者

明石 一暉 大江 秋津

出版者

一般社団法人 経営情報学会

雑誌

経営情報学会 全国研究発表大会要旨集 2020年全国研究発表大会

巻号頁・発行日

pp.69-72, 2021-01-28 (Released:2021-01-18)

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新しさゆえの不利益を持つベンチャー企業の資金繰りは厳しい。本研究は、黒字化した大学発ベンチャー企業の特性が速やかな黒字化に与えた影響を実証する。2016年から2019年の115社の経済産業省によるデータを用いて重回帰分析をした。大学発ベンチャー企業の代表者属性と大学属性、設立場所、関連研究者が速やかな黒字化に与える影響を実証し、大学は代表者を研究者にすると黒字化しやすいことを示した。さらに代表者の属性と企業特性を組み合わせた交互作用分析により、速やかな黒字化を生むメカニズムを示した。本研究は、新興企業家研究に対する理論的貢献だけでなく、大学発ベンチャー企業設立戦略を提示することにより実務的貢献とした。

著者

明石 一朗 Ichiro Akashi

出版者

関西外国語大学

雑誌

人権を考える = Thinking about Human Rights (ISSN:2189177X)

巻号頁・発行日

vol.25, pp.45-55, 2022-03

著者

明石 一 熊本 博光

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.9, no.4, pp.378-386, 1973-08-30 (Released:2009-03-27)

参考文献数

8

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This paper deals with the discrete least square approximation of multivariable functions whose values are given only at the lattice points.First, the solution is obtained as a linear combination of the values of the function at the lattice points, and it is shown that the deterministic method requires evaluation of the sum of an extremely large number of terms.Next, to overcome this difficulty, the problem is converted into that of evaluating the expected values of two probabilistic models. An algorithm based on simulating these models by means of choosing the lattice points at random is proposed for the evaluation of these expected values. The method of sampling the lattice points is also discussed.Moreover, the following points are shown.(i) The values of the parameters which are necessary to execute the algorithm can be obtained easily regardless of the number of independent variables.(ii) In two typical cases the proposed algorithm requires less computational labour than the deterministic method.(iii) The algorithm is effective in the following situations:(a) The situation when the values (data) of the function to be approximated can be measured only at the lattice points(b) The situation when the function is a composite functionA numerical example is also presented.

著者

明石 一男 宮崎 清 永田 喬

出版者

一般社団法人 日本デザイン学会

雑誌

デザイン学研究 (ISSN:09108173)

巻号頁・発行日

vol.1983, no.42, pp.40-43, 1983-05-28 (Released:2017-07-25)

著者

明石 一希 森永 英二 若松 栄史 倉橋 龍 荒井 栄司

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.853, pp.17-00084-17-00084, 2017 (Released:2017-09-25)

参考文献数

10

被引用文献数

2

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With recent globalization in industries, the number of failures and troubles of products caused by using them in unexpected ways has increased. In order to avoid such troubles, it is necessary not only to assume various ways of use thoroughly, but also to verify whether the design plan can fulfill required functions when the product is utilized in those ways. From this point of view, the authors proposed a functional verification method considering ways of use based on qualitative modeling of behavior of entities and cause-and-effect relationships among physical phenomena using Petri nets. It is, however, impossible to detect failures concerning to specification which requires dealing with quantitative information. This paper provides a method for quantitative modeling of behavior of entities and cause-and-effect relationships among physical phenomena. Two types of tokens were defined for dealing with positive and negative values and four types of arcs were for controlling changes of those values. These new elements of Petri net made it possible to represent behavior of entities and cause-and-effect relationships quantitatively. Application of this new modeling method to the functional detection method enables automatic detection of failures concerning to both functions and specification. The detection method using this modeling method was applied to an example, and its effectiveness was proven.