In this study, I investigate an application limit of Non-Linear Crack Mechanics (NLCM). NLCM is applied up to an equivalent plastic strain value of about 30%. Therefore, NLCM is applied to the equivalent plastic strain value of about 45% for verification. NLCM was applied to a strip with a crack in the center up to an equivalent plastic strain value of about 45%. As a result, NLCM can be applied to the equivalent plastic strain value of about 45% for two types of problems of strips with a center crack.

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A high-speed phenomenon was caught by multi-aspect streak camera in this time. It was caught by 6 viewpoints at the same time strictly. It created an image of 3D by Photogrammetry from the 6 pictures. As a result, a high-speed phenomenon could be made 3D models.

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This paper considers a report on the practical example of the project based learning “Collaboration work” for over 200 students in the second grade in 2020. This lecture “Collabowork I” aims to develop the ability of independence, collaboration and creativity thorough group work. In group work, we tried to solve problems such as Sustainable Development Goals (SDGs) and familiar problems. As a result of the activities, the generic skills of the students had increased after group work of this lecture.

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This paper contains a report on the activities of the project at National Institute of Technology, Oyama College in 2020. In the ROBOCON Project, we are training engineers through robot contests such as KOSEN ROBOCON. In a regional tournament in KOSEN ROBOCON 2020, we won the 1st place of 26 teams. Moreover, in the national competition in KOSEN ROBOCON 2020, we won the 1st place of 28 teams for the first time.

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Enantioselective aldol reaction is one of the most useful methods in order to synthesize the family of macrolides and ionophore antibodies which have a deoxypolypropionate skelton. As 2,4-dimethylglutaraldehyde also contains the deoxypolypropionates, enantioselective aldol reaction of meso-2,4-dimethylglutaraldehyde would efficiently construct the macrolides. We have investigated the stereoselective anti-aldol reaction of meso-2,4-dimethylglutaldehyde with propionyl ester bearing (1R,2S)-(−)-norephedrine derivatives to construct stereo tetrads building blocks with good stereoselectivities in one step. Large amounts of meso-2,4-dimethylglutaldehyde was prepared by Swern oxidation with a microflow system, and the asymmetric aldol reaction afforded the lactol in 72% yield. Diastereomeric ratio of the lactone, converted by oxidation of the lactol, was measured by HPLC with a chiral column to be 6:1. Observed diastereoselectivities could be rationalized by Zimmerman-Traxler model.

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Hydroponic systems for vegetable production are nowadays essential to maximize productions and increase yields. However, the technical issues concerning control microbial diseases and pests, and the low level of flavor have not yet been improved. Here we report volatile organic compounds (VOCs) released from companion plants can be used as chemical signals providing better quality for strawberries during the hydroponic culture. First, we identified the chemical stimuli emanating from companion plants with strawberries via spectrometry analyses and found VOCs being responsible for the strawberry growth. The strawberries grown with tomato and lavender as companion plants were significantly higher in growth than non-companion strawberry. Especially, tomato VOCs stimulated strawberry growth. Therefore, the VOC was identified the chemical structure and biological properties.

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As for the concentration of various cells, the turbidity measurement method by the spectrophotometer is used generally, but problem increase in the price of buying cost. In this report, growth of Escherichia coli with/without shaking unit was photographed by Raspberry Pi (with camera unit) and made data transmission by Wi-Fi and was considered about technique to carry out RGB analysis so far. As a result, when shaking unit was stopped, it was revealed between growth of Escherichia coli and RGB analysis result. The range of error was decreased and became accurately about RGB analysis.

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In Japan, the increasing tendency of vacant house is regarded as a problem. In this study, we will grasp the current situation of vacant house in Oyama City. Vacant house bank is one of the basic policies of "Oyama City's vacant house countermeasure plan". Since vacant house bank is the main body of "promotion of utilization", the situation and issues will be clarified. The survey is for properties registered in vacant house bank and buyers and renters of vacant house. We will consider the results and trends of vacant house bank system. Also, many users know vacant house bank on their homepage. For this reason, we will create new content to make the homepage of the vacant house bank more attractive. This will take measures against vacant house. We will make proposals that will contribute to the promotion of migration and settlement.

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The National Institute of Technology (KOSEN), Oyama College (henceforth, Oyama Kosen), Library has recently built a brief book-report sharing website intended for students at Oyama Kosen. The goals of the site are to stimulate the students to read a wider variety of books and to promote them to come to the library and to read more frequently. To attain this, the website is designed to be easily accessible to all students while ensuring its safety and security. This motivated us to create a site whose service the students can have access to without any account information. However, those who wish to post their book-reports are required to enter their e-mail addresses and “comment ID” numbers for us to avoid accepting anonymous contributions. Also, this website will only be accessible from the school’s LAN. Furthermore, a screening system is adopted to help maintain the secure and orderly use of the service.

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The purpose of this paper is to analyze the true sense and background of our school motto, "Pursuing to be an engineer of integrity (Gijutsusha de aru mae ni Ningen de are)". To achieve this purpose, we will take following two measures: firstly, analyzing the result of questionnaires about the motto to our students; and deciphering the principal's address on our school opening ceremony in 1965 with the concept of "Man of Science" by Thomas Huxley and the theory of "I and Thou" by Martin Buber.

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The latest advances in science are often expressed in language that students in Japan cannot directly understand, putting them at a disadvantage on the world stage. Content and language integrated learning (CLIL) approaches to language learning are widely considered successful. At Oyama KOSEN, we have implemented CLIL methods in our General Science (理科総合) class. We surveyed students in this class over a four-week period to see how their attitude and confidence in language skills have changed. This paper reports on the findings of these surveys. While integrating language in a science class can improve confidence in that language, knowing when and how much language material is still unclear.

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This paper aims to discuss two suggestions based on experiences through teaching a class named "Geography and History" in 2019. One is the theories of two inventions, "the Islamic world" and "tradition". The other is two cases of environmental determination by a 14th century Muslim historian and a 20th century Japanese philosopher. Though the first-year students in our college need basic knowledge of social studies primarily, these theories make us perceive relations between geography and history.

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The major aim of this questionnaire survey is to clarify attitude for the Core Value of rugby. The Rugby World Cup was held in Japan in 2019 and many Japanese people noticed the goodness of rugby. WORLD RUGBY defines " INTEGRITY"," PASSION ","SOLIDARITY ","DISCIPLINE " and " RESPECT " as CoreValues of Rugby. We conducted a questionnaire survey on CoreValues of rugby for health and physical education students who performed tag rugby. As a result they realized " PASSION " in the rugby game and practiced "SOLIDARITY " in the tag rugby physical education class.We conclude that tag rugby physical education classes may contribute to formation of character.

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