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Media Landscape without Apple: A Workshop for Critical Awareness of Alternative Media Infrastructure
Mizukoshi Shin 경인교육대학교 교육연구원 2020 The Journal of Education Vol.3 No.2
Until the 2000s, media literacy evolved while centering around the application of critical thinking of contents such as TV programs and the exchanges on social media. However, unlike television, messages on social media are inseparable from the infrastructure that supports them, as the nature of the infrastructure frames the contents and the communication phenomenon. When Google, Apple, Facebook, and Amazon are so visible in our daily lives, we believe it is necessary to examine and promote media literacy towards such media infrastructure, which has yet to be studied in depth. In 2018, Mizukoshi launched The New Literacy for Media Infrastructure Project, which aims to establish a new media theory and design educational workshop programs to develop new media literacy in the era of media infrastructure. In this paper, Mizukoshi will examine a 5-day workshop titled “Media Landscape Without Apple 2019.” “If Apple Computer went bankrupt in 2007 and iPhones don’t exist, what would our media landscape look like today? Please discuss this among your group and come up with a possible scenario.” This was the mission presented to the participants on the first day. This workshop is a model among our media infra literacy workshops whose aim is for the participants to “imagine an alternative media infrastructure environment.”
Reduction of acetaldehyde formation from pulverized solid woods by thermal and chemical treatments
Mizukoshi, Atsushi,Kurosaki, Yosuke,Yamamoto, Naomichi,Noguchi, Miyuki,Iizuka, Atsushi,Yamasaki, Akihiro,Yanagisawa, Yukio Springer-Verlag 2018 Wood science and technology Vol.52 No.2
<P>High concentrations of acetaldehyde are often observed in indoor environments. One possible source of this is acetaldehyde formation produced by ethanol from wood building materials. To characterize indoor acetaldehyde formation and propose methods for its reduction, chamber-based experiments were conducted in which alcohols were added to pulverized solid woods. The results indicated that acetaldehyde was generated from the ethanol-added wood materials, and softwoods, namely Japanese cedar, Japanese cypress, and Swedish redwood generated more acetaldehyde than the other three woods. The experiments using different types of alcohols of methanol, ethanol, 1-propanol, and 2-propanol revealed a tendency similar to the reported enzymatic profile of the higher plant-derived alcohol dehydrogenase. It was confirmed that acetaldehyde generation was reduced by treatment methods typically used for inactivating enzymes, namely chemical treatments using pyrazole, borate, and urea and thermal treatments. The findings suggest that the chemical and thermal treatment methods are useful to reduce acetaldehyde generation in indoor environments.</P>
Mizukoshi, Tomoaki,Watanabe, Kenichi,Yamazaki, Atsushi,Uritan, Akira,Iguchi, Tetsuo,Ogata, Tomohiro,Muramatsu, Takashi The Korean Association for Radiation Protection 2016 방사선방어학회지 Vol.41 No.3
Background: In order to measure neutron energy spectra, the conventional Bonner Sphere Spectrometers (BSS) are widely used. In this spectrometer, several measurements with different size Bonner spheres are required. Operators should, therefore, place these spheres in several times to a measurement point where radiation dose might be relatively high. In order to reduce this effort, novel neutron energy spectrometer using an onion-like single Bonner sphere was proposed in our group. This Bonner sphere has multiple sensitive spherical shell layers in the single sphere. In this spectrometer, a band-shaped thermal neutron detection medium, which consists of a LiF-ZnS mixed powder scintillator sheet and a wavelength-shifting (WLS) fiber readout, was looped to each sphere at equal angular intervals. Amount of LiF neutron converter is reduced near polar region, where the band-shaped detectors are concentrated, in order to uniform the directional sensitivity. The LiF-ZnS mixed powder has an advantage of extremely high light yield. However, since it is opaque, scintillation photons cannot be collect uniformly. This type of detector shows no characteristic shape in the pulse height spectrum. Subsequently, it is difficult to set the pulse height discrimination level. This issue causes sensitivity fluctuation due to gain instability of photodetectors and/or electric modules. Materials and Methods: In order to solve this problem, we propose to replace the LiF-ZnS mixed powder into a flexible and Transparent RUbber SheeT type $LiCaAlF_6$ (TRUST LiCAF) scintillator. TRUST LiCAF scintillator can show a peak shape corresponding to neutron absorption events in the pulse height spectrum. Results and Discussion: We fabricated the prototype detector with five sensitive layers using TRUST LiCAF scintillator and conducted basic experiments to evaluate the directional uniformity of the sensitivity. Conclusion: The fabricated detector shows excellent directional uniformity of the neutron sensitivity.
Design Equation for Punching Shear Capacity of SFRC Slabs
Higashiyama, Hiroshi,Ota, Akari,Mizukoshi, Mutsumi Korea Concrete Institute 2011 International Journal of Concrete Structures and M Vol.5 No.1
In this paper, a design equation for the punching shear capacity of steel fiber reinforced concrete (SFRC) slabs is proposed based on the Japan Society of Civil Engineers (JSCE) standard specifications. Addition of steel fibers into concrete improves mechanical behavior, ductility, and fatigue strength of concrete. Previous studies have demonstrated the effectiveness of fiber reinforcement in improving the shear behavior of reinforced concrete slabs. In this study, twelve SFRC slabs using hooked-ends type steel fibers are tested with varying fiber dosage, slab thickness, steel reinforcement ratio, and compressive strength. Furthermore, test data conducted by earlier researchers are involved to verify the proposed design equation. The proposed design equation addresses the fiber pull-out strength and the critical shear perimeter changed by the fiber factor. Consequently, it is confirmed that the proposed design equation can predict the punching shear capacity of SFRC slabs with an applicable accuracy.