An English course taught in collaboration with Engineering teachers were offered at Hachinohe-KOSEN. First, second, and third year students (n = 110) enrolled in the course took a survey to evaluate the course. Although they responded that the course was difficult, most students enjoyed it and felt there would be future benefits.
“Kagaku no Gakkou” is one of the open lectures held in National Institute of Technology, Hachinohe Collage. This year, “Kagaku no Gakkou” was held on the Web for the first time because of COVID-19. In this report, we introduce our efforts to hold this open lecture on the Web and the number of current views.
The paper examines the organization of Honorary Citizen’s Guard by the Kraków reception committee and its roles in Franz Joseph’s trip to Galicia in 1880. In the latter half of 19th century, the Celebration Ceremonies for the Austria-Hungary Empire had been frequently held for Franz Joseph, who symbolized the unification of the whole empire. It took place also in Kraków, the second largest city in Galicia and the center of Polish identity for a long time. Most of Polish people had lived there and had undoubtedly shared the nostalgic images of the old Jagiellonian dynasty. However, the socio- economic decline of Kraków was caused by the increasing population and economical power of Lwów. Kraków city administration utilized the Celebration Ceremonies to solve this problem by combining its loyalty to Habsburg monarchy with the historical identity of Kraków. In 1880, on welcoming Franz Joseph in Krakow, the reception committee organized Honorary Citizen’s Guard as the means to imply not only the city’s loyalty but also its historical background by displaying the conventional images of ‘Good Old Poland’ to the eyes of the audience including Franz Joseph himself. This research concludes that their attempt successfully enabled Kraków administration to fulfill their political purpose.
High speed steel (hereafter, HSS) is a steel to which a large amount of alloying elements such as Cr, W, Mo, Co, and V are added. HSS suppresses the decrease in softening resistance of tool steels at high temperatures and enables cutting at higher speeds. The HSS are classified into molten HSS and sintered HSS. Sintered HSS has no lumps of carbide and no anisotropy. Due to the fine metal structure, sintered HSS has better mechanical properties such as strength and toughness than molten HSS. Therefore, this research aims to develop a high performance powdered HSS (composition of SKH 57) with excellent mechanical properties. SKH57 uses powder made by the water atomization method. In the water atomization method, very fine metal powder can be produced by injecting high pressure water into molten metal. The average particle size of the powder produced by this method is very fine, about 5 micrometers. After that, the metal powder was agglomerated into spherical particles of about 100 micrometers and pressed. After that, the sintering conditions were optimized. The microstructure observation, hardness test, bending test, and impact test of the test piece were investigated. As a result of the experiment, the hardness of the sintered HSS and that of the molten HSS are almost the same. However, sintered HSS has excellent mechanical properties such as bending strength, impact value and wear resistance.
In precision drilling process、 burr generation is a serious problem。 It is known that ultrasonic vibration (USV) can decrease cutting force and suppress formed burr height in drilling process 。 However 、 the effect of
USV on burr mechanism in drilling process is not well understood 。 In this study 、 we focus on the effect of USV on cutting temperature and measured the cutting temperature in the drilling process for AISI 316 stainless steel plates with thermocouples。 As a result、 we found that the cutting temperature is decreased by the assist of USV。
Microbial source tracking of fecal pollution in four rivers around Hachinohe was performed using host- specific genetic markers and high-throughput sequencing techniques. The concentrations of Bacteroidales -specific marker representing total fecal pollution ranged from 103 to 105 copies/100mL. The human-specific maker was detected in two rivers, whereas the cow- and pig-specific markers were not detected. Bacterial community analysis based on 16S rRNA amplicon sequencing showed that 11 pathogenic bacteria were detected and their relative abundance were 0.0-0.87% (median 0.076%).
Japan has had a long history of earthquakes and seismic activities. It is an area of high seismicity because of its location near three major tectonic plate boundaries, and is situated on the Pacific Ring of Fire. 20% of the most dangerous earthquakes of the World occurred there. The 11 March 2011 at 5:46 pm a big earthquake occurred with an 8.9 magnitude. It was the biggest earthquake recorded since 1923. In June 2019, a big Earthquake occurred also.My project is to study all the point of impact of the earthquake. Earthquake of magnitude 6.7 occurred on June 18. In this study, We have studied about the direction of earthquake motions．
Ground deformation behavior and stability prediction under static and dynamic loading conditions are of important topics in geotechnical engineering. The stress-strain relation is usually nonlinear and stiffness valies as stress increasing. In this paper, firstly introducing elasto-plastic stress-strain constitutive relation, then a elasto-plastic bilinear hardening model was verified to understand three types nonlinear calculation methods (explicit incremental method, explicit return mapping method and implicit return mapping method) under strain or stress controlled condition. Then the each algorism was applied to computer program. The calculation results were agreed well with each other. The programming process also helped students to understand the nonlinear calculation method.
This paper reports the outline of the KOREKAWA JOMON art project 2020 that we planned and ran, also verifies the outcome that it brought community revitalization. The art project utilized local resources such as KOREKAWA JOMON archaeological ruins that led to publicizing existence of KOREKAWA through the media and the SNS.