博士(工学) / Doctor of Philosophy in Engineering / 同志社大学 / Doshisha University

京都大学 / 新制・課程博士 / 博士(工学) / 甲第24588号 / 工博第5094号 / 新制||工||1975(附属図書館) / 京都大学大学院工学研究科社会基盤工学専攻 / (主査)教授 山本 貴士, 教授 高橋 良和, 准教授 北根 安雄 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DGAM

京都大学 / 新制・課程博士 / 博士(エネルギー科学) / 甲第25402号 / エネ博第481号 / 京都大学大学院エネルギー科学研究科エネルギー変換科学専攻 / (主査)教授 川那辺 洋, 教授 林 潤, 教授 今谷 勝次 / 学位規則第4条第1項該当 / Doctor of Energy Science / Kyoto University / DFAM

近年，IoTに基づく「つながる工場」に関する技術開発が着目され，日本の次世代の製造業を支えるために，新しい研究開発が求められている．特に機械加工の現場では，異常検知や適応制御のために加工現象を精確かつリアルタイムにモニタできる技術が必要とされている．そこで，マシニングセンタなどの工作機械において，回転工具の加工中に多チャンネルで各種の物理量を切削点近傍にてモニタ可能な無線多機能ホルダを開発し，様々な工具，加工方法を対象にその有効性を示した． / Currently, a smart monitoring technology has been attracting particular attention in the factory automation fields regarding the Internet of things (IoT). Particularly in the machining site, the technology of monitoring the processing phenomenon in precision and real-time is required for abnormality detection or adaptive control. Then, we developed a novel tool holder equipped with a wireless communication function to monitor the tool temperature and vibrating accelerations near the cutting point during a tool rotating operation, and we showed effectiveness for various tools and processing method. / 博士(工学) / Doctor of Philosophy in Engineering / 同志社大学 / Doshisha University

目前偵測一般人情緒的方式大部分在研究人的行為，例如：臉部表情，以及分析人體的各項生理數值，例如：心跳、體溫以及呼吸頻率。然而這些研究只單純探討人的外在行為或生理訊號在不同情緒下的變化，而人的眼睛包含外在行為跟生理訊號，本研究將探討不同情緒下眼睛有什麼特別的反應。 我們先制訂一套實驗流程，在流程中我們以不一樣的情緒圖片給予受測者刺激，然後記錄受測者的眼動反應，並且讓受測者回報自己的情緒狀態。本研究也記錄受測者在情緒刺激下的眼動反應，並將眼動之反應轉換成序列資料，再針對不同情緒下的序列建立隱藏馬可夫模型（Hidden Markov Models：HMM）。希望藉著情緒模型，從眼動行為中偵測受刺激者處於何種情緒狀態。 本研究發現人在看圖時會依據對圖片內容的好惡，產生有意義的眼動反應。我們利用相對應的眼動反應建立情緒辨識系統，在辨識三種情緒時，辨識率能夠達到六成。

臺灣地區過去三十年來，經濟發展快速，國民生活水準亦大幅提升，在各界戮力為經濟打拼，使我國經濟大幅起飛的同時，我們的社會發展卻在重經濟以及社會變遷影響下，逐漸產生一些可能阻礙社會整體健全發展的不正常現象，導致各種社會問題隨之出現，成為社會進步及創造優質生活的絆腳石，為提供政府及民間相關單位制訂或研擬社會問題防制政策時參考，本研究乃以「文獻法」、「主觀經驗法」及「主成份分析」，編製我國社會警報指標，以一數量化指標綜合評量我國社會問題潛在發展趨勢，並以「顯著水準法」訂定警戒線及對各年超過警戒線者發布警報訊號。 依據社會警報指標各領域社會問題警報分析結果， 87年各項社會問題警報速度超過「輕警」者有「家庭問題」及「犯罪問題」等二領域，尤其是「犯罪問題」更超過巨警，若綜合全體社會問題而言，87年綜合警報速度較前幾年緩和；另就近三年各領域社會問題警報速度觀察，平均較前三年快者有「家庭問題」、「犯罪問題」、「貧富不均問題」及「環境問題」等四領域，惟全體社會問題綜合結果，速度略緩。 / Exertion of the people has promoted the growth of the Taiwan economy for over three decades. However, social dysfunctions, resulted from all the emphases at the economic growth and the changes of the collective values, could have obstructed the development of the society as a whole. In order to served as the references in making social policies related, this study tries to organize "the Taiwan Social Warning Indicators" by statistic methods, such as literature search, subjective experience, and principal component. These quantitative indexes are expected to evaluate the potential tendency of the social issues in Taiwan. On the other hand, the statistical significance method is also applied to establish the warning lines and issue the warning signs when the annual increase rate of the indicator's value－the warning speed－ of the social issues are cross the warning line. In accordance with the analysis results of the social warning indicators in this study, the increase of warning speeds of the Taiwan social issues in 1998 regarding "family" and "crime" exceed the level of "light warning". The warning speed of the "crime issue" even exceeds the level of "extremely serious warning" among all. Furthermore, the warning speed of the comprehensive social issues in the same year is estimated at increasing more lightly than those of those issues in last few years. Another finding on the warning speeds of social issues in different fields is that the result of such a research from 1996 to 1998 is much worse in average on "family issue", "crime issue", "unequal fortune distribution issue", and "environmental issue" than that on the same issue from 1993 to 1995. But the warning speed of the social issues as a whole from 1996 to 1998 increases more slowly than that from 1993 to 1995.

第22回名古屋大学年代測定総合研究センターシンポジウム平成21(2009)年度報告

科学研究費補助金 研究種目:一般研究(B) 課題番号:05454067 研究代表者:木村 真人 研究期間:1993-1994年度

近幾年針對資本結構的研究發現,在比較先進國家的企業確實有逐步調整回自己的最適資本結構的動作。本論文進一步將研究擴大到開發中國家，發現研究中的32個國家，不論是已開發或是發開中國家的企業，確實都有維持最適資本結構的動作。當資本結構偏離時，企業會逐步地調整回其最適值，然而每個國家調整回最適資本結構的調整速度則存在著差異性。本論文進一步利用國家間法律、會計、制度以及規範面的差異下去分析，發現國家發展程度以及會計制度是影響調整回最適資本結構的速度快慢的重要因子。此外，本論文亦探討融資順位理論及擇時理論的影響，發現加入融資順位理論因子後，調整速度會有相當程度的減緩，而減緩的幅度，則與國家發展程度、法律保護、公司稅率以及會計制度有顯著的關連性。 / Recent empirical literature provides evidences that firms in most developed countries do partially adjust toward their target capital structure. In this paper, we show that no only firms in developed countries, but also those in emerging countries gradually move back to their long-run equilibrium when they are away from it. But the adjustment speeds vary from country to country. We study the determinants of adjustment speeds around the world by focusing on differences in laws and regulations across countries. Our evidences show that firms in countries with common-law tradition, stronger shareholder right, or more completed accounting standards tend to move back to their optimal leverage quicker. Furthermore, we add two variables related to other two main capital structures (pecking order and market timing) in our analysis to capture their effects. Both theories add some information in explaining capital structure, but the impacts differ when applying different leverage measures. When we define leverage ratio as long-term debts dividend by net assets, we observe that pecking order factor lowers the adjustment speed a lot. And the magnitude of decrease on adjustment speed is significantly correlated with market condition, law enforcement, corporate tax rate and accounting standard. More developed countries and countries with stronger law enforcement, higher corporate tax rate, or more completed accounting standards tend to have less reduction on adjustment speed when including pecking order factor, because they have less information asymmetries.

本研究旨在探討公司治理與動態資本結構之間的關係，以及產品市場競爭對此關係的影響。 第一篇文章探討公司治理品質如何影響動態資本結構。本篇文章同時考慮負債的「接管防禦」與「懲罰」效果，對最適資本結構調整速度的影響。我們的實證結果發現，雖然低負債(underlevered)和高負債(overlevered)公司，皆呈現公司治理品質愈差，調整速度愈慢的結果，但原因並不相同。以低負債且弱治理的公司來說，因負債所扮演的懲罰角色帶來的成本，高於使用負債作為接管防禦工具所帶來的利益，因此公司傾向減少負債的使用，並以較緩慢的速度朝向目標資本結構調整。但就高負債弱治理的公司而言，因面臨較嚴重的接管威脅，為了驅逐潛在的掠奪者，公司選擇增加負債的使用，而不願調降其負債水準至目標值，因此也降低了資本結構的調整速度。 第二篇文章主要探討產品市場競爭在公司治理品質與動態資本結構關係中所扮演的角色。文獻中已有許多研究探討市場競爭對經理人的怠惰行為的影響。然而，到目前為止，仍然沒有文獻研究產品市場競爭程度的高低如何影響公司治理與資本結構調整速度之間的關係。我們的文章因此補足目前研究文獻不足之處。實證結果顯示，公司在競爭的狀態下，更願意以追求股東財富極大化為其目標，此舉也因此提升公司資本結構朝向最適目標值調整的速度。除此之外，我們的實證結果亦發現在一個高度市場競爭的環境下，弱治理與強治理公司之間調整速度的差距會縮小。 / This study contains two essays on the relationship between corporate governance on capital structure dynamics, and how production market competition affects this relation. Essay 1: Corporate Governance and the Dynamics of Capital Structure: New Evidences The effects of corporate governance on optimal capital structure choices have been well documented, though without offering empirical evidence about the impact of corporate governance quality on the adjustment speed toward an optimal capital structure. This study simultaneously considers two effects of debt originating from agency theory—the takeover defense and the disciplinary effects of debt—on the speed of adjustment to the optimal capital structure. Corporate governance has a distinct effect on the speed of capital structure adjustment: weak governance firms that are underlevered tend to adjust slowly to the optimal capital structure, because the costs of the disciplinary role of debt outweigh the benefits of using debt as a takeover defense tool. Although, overlevered weak governance firms also adjust slowly, they do so because they are reluctant to decrease their leverage toward the target level to deter potential raiders, especially if they face a serious takeover threat. Therefore, this study finds that both overlevered and underlevered firms with weak governance adjust slowly toward their target debt levels, though with different motivations. Essay 2: Corporate Governance, Product Market Competition, and Dynamic Capital Structure The importance of product market competition for analyzing managerial slack or the impact of corporate governance on capital structure decision has been widely discussed. However, prior studies pay little attention to center on the impact of market competition on the relationship between corporate governance quality and capital structure dynamics. This paper thus fills this gap in the literature. Our study finds that competition makes firms with weak governance have stronger incentive to maximize shareholders’ wealth and thus increase their adjustment speed toward their target leverage. Moreover, the difference in the adjustment speeds between weak and strong governance firms become smaller when firms operate in highly competitive industries.