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2018 Volume 52 Pages
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Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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2018 Volume 52 Pages
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Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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2018 Volume 52 Pages
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Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Akio Kikuchi, Michael Morris
2018 Volume 52 Pages
1-3
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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In colleges of technology, including National Institute of Technology, Hachinohe College, the continuation of the curriculum from the lower grades to the higher has been one of the long-remaining problems.
This study illustrates how to solve this problem by giving vocabulary building through team-teaching writing instructions for 4th year students.
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Yasushi HOSOKAWA, Masaaki YOSHIDA, Toshihiro AKITA, Hayato NAKANO, Tat ...
2018 Volume 52 Pages
5-10
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Takahiro Wakasa
2018 Volume 52 Pages
11-16
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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We have known the order and omega results for the function S(t), S1(t) and Sm(t). Also, we have known the explicit supremum of the functions S(t)and S1(t) in short intervals on the Riemann Hypothesis. For these results, we try to apply the extremal problem and the classical method. Moreover, we consider that applying these combination for the function Sm(t).
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Ryosuke KAWABATA, Yoshiharu OHSHIMA
2018 Volume 52 Pages
17-20
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Asako SAI
2018 Volume 52 Pages
21-25
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Masaaki YOSHIDA, Makiko MIURA, Gakuji SHINOHARA
2018 Volume 52 Pages
27-31
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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This paper will discuss our findings regarding trial Mongolian classes carried out before students took part in self–inquiry activities. These classes were created specifically in cooperation with teachers at New Mongol Institute of Technology, for National Institute of Technology, Hachinohe College students studying abroad. The Hachinohe students who participated in the classes were highly motivated to learn a language other than English, which they have studied for up to six years prior. They also demonstrated a willingness to try and communicate with those whose first language was not English while in Mongolia. Therefore, we felt that the students made progress surpassing what was initially expected.
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Yasuaki KIKUCHI, Kumiko SATOH
2018 Volume 52 Pages
33-38
Published: February 23, 2018
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Resorcinol cyclic tetramer (also calix[4]resorcinarene) as host 1 interact with monosaccharides in apolar solvent such as CHCl3 or CCl4 . However, this interaction is very weak because host 1 has low polarity. We synthetized resorcinol cyclic tetramer derivatives having high polarity as novel host molecules, and investigated molecular recognition host-saccharide interaction. As a result, we discovered that the novel host molecules interacted with saccharides strongly by host-guest hydrogen-bonding.
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Tatsuya YAMAUCHI, Tomoharu AKAGAKI
2018 Volume 52 Pages
39-43
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Friction and wear behaviors of PEEK composite and white metal are studied using blocks on a ring wear tester under oil-lubricated conditions. Two kinds of block materials are tested: PEEK composite filled with 30 mass% of carbon fiber and white metal (WJ2). The ring is made of forged steel (SF540A). The sliding velocity is 15 m/s. The load varies between 294 and 1177 N. The ring temperature is measured with an alumel-chromel thermocouple with a diameter of 0.5 mm, located 1mm below the frictional surface. Results indicates that the PEEK composite has better seizure-resistant properties than the white metal. Wear scars on these materials are observed using a scanning electron microscope (SEM). The seizure mechanisms are then discussed.
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Daisuke MORI, Jérémie ARONOVIEZ, Anne-sophie VERBEKEN
2018 Volume 52 Pages
45-51
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Norimasa KUDOH, Tatsuhiro Fujimura, Hiroyuki KAMAYA, Yoshiaki TADOKORO
2018 Volume 52 Pages
53-56
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Acoustic feedback called howling of hearing aids causes annoying effect for users.The adaptive filter is used to model the acoustic feedback path and cancel its effect. In this article,firstly,conventional methods,the plain LMS method and the modified LMS method are briefly reviewed.And then,a problem of the conventional methods,namely,falling in biased estimation,is described.This is due to: (1) correlation between the input signal of the adaptive algorithm and the observation noise; (2) uneven frequency allocation for FIR type notch filter.In order to cope with the problems,a howling canceller with IIR notch filters,in which the input signal of the adaptive algorithm is quasi-whitened,is proposed.Finally,from extensive simulations,the validity of the proposed method is verified.
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Hayato NAKANO
2018 Volume 52 Pages
57-64
Published: February 23, 2018
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Quantum mechanics seems to reject the existence of a perfectly objective entity. If and only if plural observers share all of classical information about the physical system, the quantum state of the system is the same for each observer.
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Yoshitaka NAKAMURA, Natsumi SAWAI, Takaharu KAMADA, Akira HASEGAWA, To ...
2018 Volume 52 Pages
65-69
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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To apply zinc oxide (ZnO) to a transparent electrode, hydrogen treated zinc oxide thin films were prepared that a pure ZnO thin films were deposited on glass substrates by off-axis rf magnetron sputtering and then the films were annealed in hydrogen gas. The ZnO thin films were deposited at substrate temperature Ts from R.T. to 300[e]. ZnO films deposited at substrate temperature 300e had many orientation grains. The electrical resistivity of the ZnO thin films degreased from 1.29×10'[Ωcm] to 1.46×10*+[Ωcm] by annealed at 300e in hydrogen gas. The c-axis lengths, energy gaps and optical transmittances of ZnO films decreased by annealed in hydrogen gas. Next, ZnO thin films were deposited at a substrate temperature Ts=R.T., and then the ZnO films were annealed at temperatures of from 100e to 300[e]. The pure ZnO films and hydrogen annealed ZnO films showed almost same (0001) single phase orientation. The electrical resistivity of the ZnO films degreased from 1.22×10,[Ωcm] to 4.74×10*+[Ωcm] by annealed at 400[e] in hydrogen gas. C-axis lengths of the hydrogen treated ZnO films neared single crystal’s values with increasing temperatures of annealing process. There was no apparent change of energy gaps of ZnO films annealed at various temperature. Optical transmittances of these ZnO films showed almost 80[%].
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Nobuaki MATSUHASHI, Kazumasa YAMADA
2018 Volume 52 Pages
71-77
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Shigeto NAKAMURA, Yukinori KOIZUMI
2018 Volume 52 Pages
79-84
Published: February 23, 2018
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The transport of three tervalent lanthanides (Ln), La(III), Gd(III) and Lu(III) with the tubular supported liquid membrane impregnated with 2-thenoyltrifluoroacetone (TTA) in the presence of the unidentate ligand, tributylphosphate (tbp), or the bidentate ligand, 2,2’-bipyridine (bpy) in kerosene was investigated. All the plots of logarithmic transport rate constant (kobs) against pH for Ln gave straight lines with slopes of 0.6-0.9 for TTA alone, 2.9-3.1 for the TTA-tbp system and 2.2-2.7 for the TTA-bpy system at lower pH. At higher pH, values of log kobs for all Ln were kept to about -2.8. Increments of transport rates of Ln are attributed to synergistic effects by the addition of tbp or bpy. The TTA-bpy system is more effective for the separation than the other systems.
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Tetsuo HONMA, Chihiro KON, Kouki AINO
2018 Volume 52 Pages
85-90
Published: February 23, 2018
Released on J-STAGE: October 23, 2018
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Viscosities and phase behavior of polystyrene – organic hybridized silica nanoparticle at 270 °C were measured with a newly developed visible windows equipped rotational viscometer. The improvement of selection and mounting for the rotary shaft coupling decreased the fluctuation of viscosity measurements. Organic hybridized silica
nanoparticles were obtained by treating phenyltrimethoxysilane and silica nanoparticle. The formation of organic hybridized silica nanoparticles were confirmed by using TG-DTA and FT-IR. The viscosities of polystyrene – organic hybridized silica nanoparticles were increased with the mass fraction of the organic hybridized nanoparticles, because the melting point of the blend polymer was increased with the mass fraction of the organic hybridized nanoparticles. The phase behavior of the polystyrene – organic hybridized silica nanoparticle were carried out by the view window, however, no homogeneous states of the blend polymer were found due to the increase of the melting point and the lack of heating temperature. In the future work, we have to optimize the melting temperature and equilibration time for the polystyrene – organic hybridized silica nanoparticle system.
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Kumiko SATOH, Ayumi YAMAMOTO, Yasuaki KIKUCHI
2018 Volume 52 Pages
91-96
Published: February 23, 2018
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There is the problem of mass disposal of scallop shells as unutilized resource in our Aomori Prefecture. The principal component of shell is calcium carbonate exhibiting hydrophilic property. On the other hand, we have previously developed a new synthetic method of the grafted poly(vinyl chloride) (PVC) improved the giving hydrophilicity by grafting poly(2-methyl-2-oxazoline)s as reported in the preceding paper. Thus this paper describes the preparation of novel grafted PVC composites filled with powder of scallop shell.
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Yuki TANAKA, Kenshin OKITA, Yoichi ITAGAKI, Junichi YAGUCHI
2018 Volume 52 Pages
97-101
Published: February 23, 2018
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Genetic engineering techniques were used in order to generate standard curves for the quantitative PCR of fecal markers. PCR amplification products derived from sewage, feces of pig, cow and black–tailed seagull were cloned into a TOPO-TA plasmid vector. Recombinant plasmids were inserted into Escherichia coli competent cells and transformed cells were screened on LB agar medium. Colony PCR and electrophoresis were used to confirm the DNA sequence length of each marker. The plasmids were extracted from transformed E. coli cells to generate standard curve for the quantitative PCR assay. Four standard curves for the quantifications of fecal markers were constructed and the PCR amplification efficiencies calculated from the slope were from 96 to 105%.
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Mitsuhiro ITO, Ken SATO
2018 Volume 52 Pages
103-107
Published: 2018
Released on J-STAGE: October 23, 2018
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This year, we’ve replaced our campus network to KOSEN unified designed network. It was very difficult for us to replace from our custom designed network to pre-configured network system. In this report, we describe about how we cleared our migrating problem such as a fully authenticated wired access, completely monitored equipment, and useful wireless network.
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Asako SAI
2018 Volume 52 Pages
109-112
Published: 2018
Released on J-STAGE: October 23, 2018
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