In 2019, National Institute of Technology (KOSEN) held a “Study Camp for
Sustainable Society Program” at Otago Polytechnic, New Zealand, for two weeks. The
purpose of this program was to foster global engineers who have an interest in global issues and
problem-solutions toward achieving Sustainable Development Goals and who have global
challenges from their earlier years. NIT, Hachinohe College was directly involved with this
program. A total of 14 Kosen students from seven Kosens took part in this program. This is a
report about this program. In addition to this report, students’ perspectives on their experiences
of this program were explored based on their reports and questionnaires before and after the
NIT-Hachinohe College accepted two Thai freshman students from Princess Chulabhorn Science High
Schools (PCSHS) in April, 2019. This study reports how English classes were conducted and students responded
when a class became global.
In recent years, natural ventilation has attracting attention as a ventilation method for buildings. In order to realize the method, it is important to understand natural convection of large-scale air in the building considering radiation influenced by the thermal radiation. This research aims to understand the combined heat transfer phenomenon of natural convection and radiation by using OpenFOAM, a CFD open software that has been attracting attention in recent years. Although the radiation library is attached to OpenFOAM, there are many unclear points regarding the analysis accuracy of this library. To evaluate the accuracy of the radiation library of OpenFOAM, a laminar natural convection under the influence of radiation was analyzed in this study. The dependence of the number of divisions on the spatial angle of radiation calculation was investigatd. Assuming that 10 degree of the division angle is correct, the accuracy dependency of the discretizing angle for ray for discrete ordinate method was investigated. Temperature and velocity distribution, and heat transfer coefficient were used as parameters for comparison. As a result, it was found that the error was less than 1 percent when divided into 18 degrees.
Filtered-x LMS algorithm and its relatives are the most popular control algorithms for ANC, because of their
simplicity and practical performance. In these algorithms, the input signal to the algorithms is the signal filtered by the plant model. As well known, this causes two major problems, i.e.., large computational burden and the delay of the signalpath. We have proposed a new method without using the plant model to overcome the above problems for specific applications such as ventilation equipment and ANC inside cars. In this article, it is proposed that the order of notch filters is rearranged so that an intermediate gain is not influenced. It’s also shown that proposed algorithm performs almost the same as MELMS (extended algorithm of filtered-x LMS for multic hannel case) with much less computational load.
Ribulose-1, 5-bisphosphate carboxylase/oxygenase (RuBisCO) is one of the enzymes that exist most abundantly on the earth. It catalyzes a carbon dioxide fixation reaction in photosynthesis. It is of importance to increase the activity of RuBisCO and to reduce carbon dioxide for solving lack of natural resources and recent environmental problems. The 31P-NMR analysis of the carbon dioxide fixation reactions catalyzed by RuBisCO have been investigated by using sub- or supercritical carbon dioxide as a substrate. The reaction proceeded very rapidly under these conditions as ompared with normal conditions and the reaction rate was extremely improved up to 36times.
Poly(2-alkyl-2-oxazoline)s (PROZO) and triazinethiols have attracted many attentions because they
have good and interesting properties. Thus the present author has synthesized the telechelics which are composed
of PROZO and triazinethiols, then has worked on preparations and modifications of various materials. In this paper,
the studies up to the present and the future plans are described.
Garlic (Allium sativum L.) is widely used as a seasoning around the world. Aomori prefecture reached an
approximately 70% share of the garlic production in Japan. Recently, agricultural industry is faced with big problem with human resource shortages and aging of the farmer. Additionally, the interest for food safety have been increasing with organic vegetables without use of any pesticides. In response to these issues, full control hydroponic cultivation
systems are useful with less human resource and pesticide-free production under controlled cultivation environment.
However, hydroponic culture for garlic cultivation is not established yet. In this study, we demonstrated hydroponic
culture of garlic without use of any pesticides. As a result, hydroponic culture showed fast growing rate compared soil culture.
Report on the Thailand International Self-Directed Research Program held from August 28 (Wednesday) to September 12 (Thursday), 2019 at Princess Chulabhorn Science High School, Chonburi (PCSHS, Chonburi).