start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=1
article-no=
start-page=69
end-page=82
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1988
dt-pub=19881122
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Plasma Oscillation in Semiconductor Superlattice Structure
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The statistical properties of two-dimensional systems of charges in semiconductor superlattices are analyzed and the dispersion relation of the plasma oscillation is calculated. The possibility to excite these oscillations by applying the electric field parallel to the structure is discussed.
en-copyright=
kn-copyright=

en-aut-name=TotsujiHiroo
en-aut-sei=Totsuji
en-aut-mei=Hiroo
kn-aut-name=東辻浩夫
kn-aut-sei=東辻
kn-aut-mei=浩夫
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=TakeiMakoto
kn-aut-sei=Takei
kn-aut-mei=Makoto
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Oepartment of Electrical and Electronic Engineering

affil-num=2
en-affil=
kn-affil=Oepartment of Electrical and Electronic Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=1
article-no=
start-page=61
end-page=68
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1988
dt-pub=19881122
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Determination of Electrical Parameters for Skin during Galvanic Skin Reflex from Continuous Measurement
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Skin impedance satisfies the Cole-Cole arc's law. The change of skin impedance during GSR (Galvanic Skin Reflex) can be expressed by the change of equivalent parallel resistance approximately. Using these characteristics, the complicated change of skin impedance during GSR can be determined continuously from the measurement value in one frequency point.
en-copyright=
kn-copyright=

en-aut-name=YamamotoYoshitake
en-aut-sei=Yamamoto
en-aut-mei=Yoshitake
kn-aut-name=山本尚武
kn-aut-sei=山本
kn-aut-mei=尚武
aut-affil-num=1
ORCID=

en-aut-name=YamamotoTatsuma
en-aut-sei=Yamamoto
en-aut-mei=Tatsuma
kn-aut-name=山本辰馬
kn-aut-sei=山本
kn-aut-mei=辰馬
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Electrical and Electronic Engineeringtronic Engineering

affil-num=2
en-affil=
kn-affil=Department of Electrical and Electronic Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=1
article-no=
start-page=49
end-page=60
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1988
dt-pub=19881122
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Transient Displacement Response to Pulse Excitations on Periodontal Tissues
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In the field of dental study it is most fundamental and necessary to estimate the condition of periodontium. In order to examine a mechanical characteristics of periodontium, the theoretical displacement response to periodontal mechanical model (three elements model) are strictly solved in case of some pulse excitations. Impact excitations (rectangular, triangular and half-cycle sine pulse) are given in physical and mathematical definitions and complete solutions to the impact excitations are provided. The triangular pulse excitation which is obtained by means of a fracture of pencil-lead is most suitable. The mechanical parameters of periodontium are given using this input excitation. This is experimentally confirmed by artificial tooth model. The obtained mechanical characteristic of the periodontal tissues can be applied to clinical diagnosis.
en-copyright=
kn-copyright=

en-aut-name=OkaHisao
en-aut-sei=Oka
en-aut-mei=Hisao
kn-aut-name=岡久雄
kn-aut-sei=岡
kn-aut-mei=久雄
aut-affil-num=1
ORCID=

en-aut-name=YamamotoTatsuma
en-aut-sei=Yamamoto
en-aut-mei=Tatsuma
kn-aut-name=山本辰馬
kn-aut-sei=山本
kn-aut-mei=辰馬
aut-affil-num=2
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=IsayamaYoshiharu
kn-aut-sei=Isayama
kn-aut-mei=Yoshiharu
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Electrical and Electronic Engineering

affil-num=2
en-affil=
kn-affil=Department of Electrical and Electronic Engineering

affil-num=3
en-affil=
kn-affil=Department of Electrical and Electronic Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=1
article-no=
start-page=39
end-page=48
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1988
dt-pub=19881122
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Amorphous Oxides Prepared from Organometallic Compounds Part2. Structure Evolution in Sodium Borosilicate Gels
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Sodium borosilicate gels of compositions similar to that of Vycor(R) glass like 80SiO(2).15B(2)O(3).5Na(2)O (wt%) were prepared from hydrolysis and polycondensation of metal alkoxides under the HCl catalysis. Variation of specific surface area and porosity with temperature indicated that closed pores were opened below 400℃, and collapsed above 450℃ after the porosity reached a maximum value around 450℃. The structural evolution was examined due to IR spectra and a phase separation in the gels was observed. The solubility of the gels into 1N-HCl was studied as a function of the treatment temperature.
en-copyright=
kn-copyright=

en-aut-name=OsakaAkiyoshi
en-aut-sei=Osaka
en-aut-mei=Akiyoshi
kn-aut-name=尾坂明義
kn-aut-sei=尾坂
kn-aut-mei=明義
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=YuasaMotokazu
kn-aut-sei=Yuasa
kn-aut-mei=Motokazu
aut-affil-num=2
ORCID=

en-aut-name=MiuraYoshinari
en-aut-sei=Miura
en-aut-mei=Yoshinari
kn-aut-name=三浦嘉也
kn-aut-sei=三浦
kn-aut-mei=嘉也
aut-affil-num=3
ORCID=

en-aut-name=TakahashiKatsuaki
en-aut-sei=Takahashi
en-aut-mei=Katsuaki
kn-aut-name=高橋克明
kn-aut-sei=高橋
kn-aut-mei=克明
aut-affil-num=4
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Applied Chemistry

affil-num=2
en-affil=
kn-affil=Sekisui Chemical Industry, Ltd.

affil-num=3
en-affil=
kn-affil=Department of Applied Chemistry

affil-num=4
en-affil=
kn-affil=Department of Applied Chemistry
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=1
article-no=
start-page=31
end-page=38
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1988
dt-pub=19881122
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Amorphous Oxides Prepared from Organometallic Compounds Part 1. Preparation of Sodium Borosilicate Gels
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Sodium borosilicate gels of compositions similar to that of Vycor(R) glass like 80SiO(2).15B(2)O(3).5Na(2)O(wt%) were prepared from hydrolysis and polycondensation of tetraethyl orthosilicate, trimethyl borate, and sodium methylate under the HCl catalysis. Variation of the gelation time is examined as a function of the  mixing ratio of the starting materials and the catalyst. The thermal behavior of the gels has been discussed on the basis of their TG and DTA traces.
en-copyright=
kn-copyright=

en-aut-name=MiuraYoshinari
en-aut-sei=Miura
en-aut-mei=Yoshinari
kn-aut-name=三浦嘉也
kn-aut-sei=三浦
kn-aut-mei=嘉也
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=YuasaMotokazu
kn-aut-sei=Yuasa
kn-aut-mei=Motokazu
aut-affil-num=2
ORCID=

en-aut-name=OsakaAkiyoshi
en-aut-sei=Osaka
en-aut-mei=Akiyoshi
kn-aut-name=尾坂明義
kn-aut-sei=尾坂
kn-aut-mei=明義
aut-affil-num=3
ORCID=

en-aut-name=TakahashiKatsuaki
en-aut-sei=Takahashi
en-aut-mei=Katsuaki
kn-aut-name=高橋克明
kn-aut-sei=高橋
kn-aut-mei=克明
aut-affil-num=4
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Applied Chemistry

affil-num=2
en-affil=
kn-affil=Sekisui Chemical Industry, Ltd.

affil-num=3
en-affil=
kn-affil=Department of Applied Chemistry

affil-num=4
en-affil=
kn-affil=Department of Applied Chemistry
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=1
article-no=
start-page=1
end-page=12
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1988
dt-pub=19881122
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=The Study on the Evaluation of the Visual Work Using the Logistic Curve
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Display equipment has been used as communication media in
the factory, office, and home. In order to communicate
effectively, it is necessary to clarify the characteristics
of eye movement in the case of looking at the display. The development of Eye Camera enables us to measure eye movement during work, so that we can collect the many data of eye movement during work. In this study, we proposed a method to evaluate the visual work using the distribution of visual points in X and Y axis. The cumulative distribution is approximated by the logistic curve which shows the symmetry and kurtosis by the parameter. The proposed method was applied to the three typical display models, that is, the digital meter model, reading model, and game model. In the digital meter model, the visual points were distributed symmetrically along the meters, and the symmetry and kurtosis of the distribution varied by the arranged direction of the meter. In the reading model, the visual points were distributed nearly symmetrically and uniformly in each axis and they were moved around the character and line from the period of spectrum analysis. In the game model, the visual points moved according to the target and were distributed symmetrically in the Y axis. And whether the target moved vertically or horizontally, the kurtosis of the distribution became equal in each axis.
en-copyright=
kn-copyright=

en-aut-name=MatsudaMasaaki
en-aut-sei=Matsuda
en-aut-mei=Masaaki
kn-aut-name=松田正明
kn-aut-sei=松田
kn-aut-mei=正明
aut-affil-num=1
ORCID=

en-aut-name=OsakiHirokazu
en-aut-sei=Osaki
en-aut-mei=Hirokazu
kn-aut-name=大崎紘一
kn-aut-sei=大崎
kn-aut-mei=紘一
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Civil Engineering

affil-num=2
en-affil=
kn-affil=Department of Civil Engineering
END