Insensitivity to Unethical Behavior in Decision Making when Indirectly Intermediated

AbstractThe indirect involvement in the unethical behavior represented by violation of regulation is believed to lessen the responsibility for the accident occurred due to the unethical behavior as compared to the direct involvement in the unethical behavior. It has been explored how punishment changes when violation of rule or defection is committed indirectly in decision making. It was hypothesized that we tend to be insensitive to violation, defection, or unethical behavior in decision making when it was indirectly intermediated. In other words, we explored whether allowing indirect actions leads to increased uncooperative decision in decision making. These results mean that the punishment to the indirectness does not always get smaller. The punishment to the indirectness gets smaller only when the reward by Players B and D are larger. In conclusion, the hypothesis that the indirect intermediation reduces the punishment and thus lessons the responsibility for the unethical violation behavior is true for the limited condition

かご形誘導電動機の高精度性能算定に向けた評価技術の研究

学位記番号：理工博乙9

Java Program Analysis Projects in Osaka University : Aspect-Based Slicing System ADAS and Ranked-Component Search System SPARS-J

Software Engineering, 2003. Proceedings. 25th International Conference onDate of Conference:3-10 May 200

Comparing Code Similarity Using Information Retrieval Techniques and Deep Learning

コード片の類似性判定法はソフトウェア工学における重要な基礎技術であり，コードクローン検出やコード片検索などで使用される．コード片の類似性判定法では，構文的な類似性だけでなく，処理内容の意味的な類似性も判定することが重要である．我々の先行研究では，情報検索技術に基づくベクトル表現とコサイン類似度を組み合わせた類似性判定法を用いていた．この手法は処理内容の意味的な類似性を高速に判定できる一方で，検出漏れが多い課題がある．また近年，深層学習を用いた類似性判定法が提案されている．この手法は意味的な類似性を高い精度で判定できる反面，実行速度が遅い課題がある．そこで本研究では，判定精度と実行速度の二つの観点で情報検索技術に基づくベクトル表現と深層学習の効果的な組み合わせを調査する．調査の結果，情報検索技術の一種であるLSI (Latent Semantic Indexing)と深層学習モデルの組み合わせが判定精度の面で最も高い値となった．またこの組み合わせは実行速度が最も速いことも確認した．横井, 一輝, 崔, 恩瀞, 吉田, 則裕, et al. 情報検索技術と深層学習を用いたコード片類似性判定法の比較調査. 電子情報通信学会論文誌D 情報・システム J106-D, 231 (2023); https://doi.org/10.14923/transinfj.2022pdp0009

Analyses of integrated EPID images for on-treatment quality assurance to account for interfractional variations in volumetric modulated arc therapy

Purpose: To investigate the effects of interfractional variation, such as anatomical changes and setup errors, on dose delivery during treatment for prostate cancer (PC) and head and neck cancer (HNC) by courses of volumetric modulated arc therapy (VMAT) aided by on‐treatment electronic portal imaging device (EPID) images. Methods: Seven patients with PC and 20 patients with HNC who had received VMAT participated in this study. After obtaining photon fluence at the position of the EPID for each treatment arc from on‐treatment integrated EPID images, we calculated the differences between the fluence for the first fraction and each subsequent fraction for each arc. The passing rates were investigated based on a tolerance level of 3% of the maximum fluence during the treatment courses and the correlations between the passing rates and anatomical changes. Results: In PC, the median and lowest passing rates were 99.8% and 95.2%, respectively. No correlations between passing rates and interfractional variation were found. In HNC, the median passing rate of all fractions was 93.0%, and the lowest passing rate was 79.6% during the 35th fraction. Spearman’s correlation coefficients between the passing rates and changes in weight or neck volume were − 0.77 and − 0.74, respectively. Conclusions: Analyses of the on‐treatment EPID images facilitates estimates of the interfractional anatomical variation in HNC patients during VMAT and thus improves assessments of the need for re‐planning or adaptive strategies and the timing thereof

Immunology and Inflammation

In the thymus, the thymic epithelium provides a microenvironment essential for the development of functionally competent and self-tolerant T cells. Previous findings showed that modulation of Wnt/β-catenin signaling in mouse thymic epithelial cells (TECs) disrupts embryonic thymus organogenesis. However, the role of β-catenin in TECs for postnatal T-cell development remains to be elucidated. Here, we analyzed gain-of-function (GOF) and loss-of-function (LOF) of β-catenin highly specific in mouse TECs. We found that GOF of β-catenin in TECs results in severe thymic dysplasia and T-cell deficiency beginning from the embryonic period. By contrast, LOF of β-catenin in TECs reduces the number of cortical TECs and thymocytes modestly and only postnatally. These results indicate that fine-tuning of β-catenin expression within a permissive range is required for TECs to generate an optimal microenvironment to support postnatal T-cell development