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Identification Experiment of Old and New 500-Yen Coins Using Simple Equipment with the Mahalanobis-Taguchi Method
Get PDF本稿では、マハラノビス・タグチ法（MT法）を用いた新旧500円硬貨の判別実験の結果について報告する。
令和3年11月に日本国において、三代目の新500円硬貨の流通が開始されたが、対応済みの自動販売機の数は令和5年時点において、2～ 3割程度の数であり、センサー更新の必要性がある。MT法は、汎用的なパターン判別の手法であり、良品、不良の判別に活用されているところ、新旧500円硬貨の判別への適用可能性について実験を行った。
実験では、新旧500円硬貨の材質や電気的特性を基に判別を行った。実験の結果、MT法を適用して新旧500円硬貨を適切に判別できることが確認された。
MT法の汎用性が高い手法であることから、筆者が所属する航空整備学専攻の教育研究においても広く役立つと考え、本稿にて実験結果を報告する。今後、他の硬貨や航空整備分野での応用可能性についても検討していく
Processing Characteristics of Acrylic Resin using CO2 Laser Machining― Laser Cutting and Microfabrication by Laser Engraving ―
Get PDF我々の生活において樹脂材料の適用範囲は幅広く、様々な分野で活用されている。例えば、医療や化学の分野においては、微細形状を加工したシリコーンやアクリル樹脂が分析チップとして使用されており、低コスト化、大量生産に向けた対応が進んでいる。分析チップの製作においては、樹脂材料へ微細形状加工を行う様々な方法が提案されており、高効率な加工方法としてレーザ加工が注目されている。しかしながら、レーザ加工は発振器が高価であり、加工コストが高くなるといった課題もある。そこで、本研究では、比較的安価であり樹脂材料の加工に適した炭酸ガスレーザを用いて、最も汎用的な樹脂材料の一つであるアクリル樹脂に対して微細加工を行い、その加工特性を評価した。炭酸ガスレーザを用いたアクリル樹脂の微細加工として、精密切断加工および微細形状加工に取り組んだ結果、切断溝幅0.5 mm以下のレーザ切断、□0.5 mm程度のパターン形状のレーザ彫刻が可能であることがわかった。本研究により、炭酸ガスレーザを用いた樹脂材料に対する低コスト、高効率な微細加工の可能性を確認することができた
Studies for Trajectory of Iconographies by Leonard Foujita Paintings for Recollections and Condolences of Leonard-Tsuguharu FOUJITA－Café and ‘La Petite Madeleine’, Melancholy and Vanitas／Iconology of “Dream, Sleep, Death”－
Get PDFLeonard Foujita (Leonard-Tsuguharu FOUJITA /1886-1968) was active as one of the representatives of the trend of the ‘École de Paris’ in Paris in the 1920s. In recent years, 100 years after the name of the ‘École de Paris’ was born, various issues such as copyright, work appraisal, and copyright have been gradually resolved and overcome, and the artistic environment for works has been established. Therefore the studies, exhibitions and publishing regarding Foujita, who was born as a Japanese and died as a French, is advancing to a new stage. Recent studies have revealed that Foujita skillfully adopted Western classical forms while fusing eastern and western aesthetics. After moving to France in 1913, Foujita went to the Louvre Museum to study ancient art. Foujita said he was particularly fascinated by ancient Greek sculptures and Egyptian paintings, and these two ancient aesthetics and motifs can often be found in Foujitaʼs iconographies. His perspective on ancient art, which was the origin of his activities in Paris, became the basis for his quest for his identity as an artist throughout his life, and also became a mirror that reflected the innermost part of the artist's soul. In this article, while exploring the essence of the painting world that connects the genealogy of beauty in the east and west and the life that lived in the turbulent times, the encounter and separation with the companions who lived together such as Madeleine Eugénie Louise Lequeux (1906-1936) or Youki/Lucie Badoud (1903-1966) from the perspective of relationships, I explore the core of art that has deepened in the days of tracing love and recollection. Chapter I focuses on a painting with the theme of “Cafe” and their variations, and considers the transition of images repeatedly produced until his late years, analyzing the development from drawings to paintings and the term ‘La Petite Madeleine’. Then I insight the remnants and remembrances of Madeleine Lequeux, the companion of the deceased, entrusted to the theme of “Cafe”. In Chapter II, based on the thoughts derived from the examination of images in previous Chapter I, I analyze images about “Sleep and Dream”, such as reclining nudes, still-lives, portraits, and Christian themes, are drawn. While clarifying the genealogy of “Death and Melancholy” hidden in the depths of images, I trace the iconographies of condolence that sublimates the inspiration received from the classics into the inner introspection
Fundamental Study on Laser Cutting of Magnesium Alloy Using Q-Switched Fiber Laser
Get PDF近年、電子機器の軽量化や自動車・航空機の軽量化と燃費向上のためにマグネシウム合金の需要が高まっている。しかしながら、マグネシウム合金は加熱すると容易に燃焼してしまうため、取り扱いには注意が必要となる。例えば、マグネシウム合金をレーザ加工した場合、適切な加工条件でなければレーザ加工熱によって容易に燃焼してしまう。しかしながら、レーザ加工は、機械加工の課題である切りくずの後処理が不要であり、無負荷加工であることから、柔らかいマグネシウム合金であっても薄板や長尺品の加工が可能となる。したがって、レーザ加工をマグネシウム合金の加工に適用することは、材料の適用範囲を拡大する上で重要な取り組みとなる。
本研究では、金属材料の精密加工に適しているQスイッチパルスファイバレーザを用いて、マグネシウム合金の切断加工特性を評価した。試験片には、汎用マグネシウム合金であるMS-AZ31B、難燃性マグネシウム合金MS-AXM620およびKUMADAI耐熱マグネシウム合金MS-WZ75を使用した。切断溝性状やドロス高さなどの加工性を比較した結果、材料の熱的物性値の違いにより、切断加工特性がそれぞれ異なることが明らかとなった
Using Teacher Interviews as a Tool for Motivating Students
Get PDFThe Sojo International Leaning Center (SILC) is the teaching and research center where English classes are held at Sojo University. This article reports on a SILC Pioneers’ Educational Chat (SPEC) conducted during the 2020-21 academic year. The purpose of this particular SPEC was to introduce SILC teachers to an activity that is used during the Self-Directed Learning (SDL) unit in the curriculum for second-year students. During the SDL unit students are taught how to manage their own learning by making goals and creating learning plans to achieve these goals. Students need a sufficient amount of motivation to accomplish this. One possible source of motivation could come from the use of role models. At the beginning of the SDL unit students complete an activity in which they watch a video of a Japanese professor speaking English and giving advice to students on how to study English. The SPEC described the process of conducting interviews in English with Japanese professors from other departments at Sojo University, and then creating an activity using these video-recorded interviews as a tool for motivating students to study English on their own. This report will outline the main points discussed during the SPEC
Understanding and Supporting L2 Learners with ASD and ADHD
Get PDFSLA research makes frequent reference to individual learning differences. However, there tends to be less mention of autism spectrum disorder (ASD) and attentiondeficit/ hyperactivity disorder (ADHD), two frequently diagnosed learning differences. Though ASD and ADHD potentially have a profound influence on students’ second language development, many foreign language teachers lack training in dealing with these conditions. Both are considered to be a range of neurological differences: aspects of ASD affect social communication; ADHD is connected to working memory, processing speed, and attention. Though these conditions are distinct, both are common, frequently coincide, and have direct connections to how languages are learned and practiced. The purpose of this paper is to provide an overview of ASD and ADHD, and to discuss what types of accommodations L2 teachers in Japan can adopt to most appropriately support learners with ASD and ADHD
