start-ver=1.4
cd-journal=joma
no-vol=19
cd-vols=
no-issue=1
article-no=
start-page=53
end-page=62
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1984
dt-pub=19841126
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Evaluation of Three Flow Injection Analysis Methods for the Determination of Chemical Oxygen Demand
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Three methods for determining chemical oxygen demand (COD) by means of flow injection analysis (FIA) with potassium permanganate, potassium dichromate, or cerium(IV) sulfate as oxidant, developed in this laboratory, are described from the point of view of their operating properties. The permanganate method is the most sensitive and common, but forms manganese(IV) oxide precipitate which blocks the FIA lines and connectors. Addition of phosphoric acid in the reagent system is, however, effective to some extent in order to avoid blocking the flow system. The dichromate method is the most workable and stable, but produces toxic wastes containing chromium(VI). The cerium method is the most probable because cerium(IV) is the strongest oxidant of the three and less poisonous. The last method with
cerium(IV) sulfate is therefore recommendable to apply to the continuous monitoring of COD in many situation.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KorenagaTakashi
kn-aut-sei=Korenaga
kn-aut-mei=Takashi
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=MoriwakeTosio
kn-aut-sei=Moriwake
kn-aut-mei=Tosio
aut-affil-num=2
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=TakahashiTeruo
kn-aut-sei=Takahashi
kn-aut-mei=Teruo
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Center for Environmental Science and Technology, Okayama University

affil-num=2
en-affil=
kn-affil=Department of Synthetic Chemistry

affil-num=3
en-affil=
kn-affil=Department of Industrial Chemistry
END

start-ver=1.4
cd-journal=joma
no-vol=19
cd-vols=
no-issue=1
article-no=
start-page=45
end-page=51
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1984
dt-pub=19841126
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Preparation and Dielectric Properties of [Ba, Ca] TiO(3)-Al(2)O(3)-SiO(2) Glass-Ceramics
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Succeeding to 60(Ba,Sr)TiO(3)-10A1(2)O(3)-30SiO(2)glassceramics reported in our previous paper, another type
of ferroelectric glass-ceramics was elaborated by the
controlled growth of Ba(l-x)Ca(x)TiO(3) crystal particles in the glass system 60 (Ba(l-y)Ca(y)) TiO(3)-10Al(2)O(3)-30SiO(2) (0.0<y<0.25) in molar basis. Analysis of crystal phases by X-ray diffraction revealed that Ca content in the
crystal phase of Ba(l-x)Ca(x)TiO(3) increased with increasing amount of CaO in glass up to y=0.125, and the composition of Ba(l-x)Ca(x)TiO(3) solid solution was restricted by x=0.225. Curie points(Tc) of the present glasscceramics were independent of the composition of Ba(l-x)Ca(x)TiO(3), however temperature coefficients of ƒ° were
lowered by the addition of increasing amount of CaO.
Frequency dependencies of dielectric constant and loss tangent were examined in the frequency range from 1 k to 1 M Hz.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=OdaKiichi
kn-aut-sei=Oda
kn-aut-mei=Kiichi
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=YoshioTetsuo
kn-aut-sei=Yoshio
kn-aut-mei=Tetsuo
aut-affil-num=2
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=O-okaKazuo
kn-aut-sei=O-oka
kn-aut-mei=Kazuo
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Research Institute for Non-Crystalline Materials

affil-num=2
en-affil=
kn-affil=Research Institute for Non-Crystalline Materials

affil-num=3
en-affil=
kn-affil=Research Institute for Non-Crystalline Materials
END

start-ver=1.4
cd-journal=joma
no-vol=19
cd-vols=
no-issue=1
article-no=
start-page=33
end-page=44
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1984
dt-pub=19841126
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Error Analysis of Band Matrix Method
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Numerical error in the solution of the band matrix method based on the elimination method in single precision is investigated theoretically and experimentally, and the behaviour of the truncation error and the roundoff error is clarified. Some important suggestions for the useful application of the band solver are proposed by using the results of above error analysis.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=TaniguchiTakeo
kn-aut-sei=Taniguchi
kn-aut-mei=Takeo
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=SogaAkira
kn-aut-sei=Soga
kn-aut-mei=Akira
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

start-ver=1.4
cd-journal=joma
no-vol=19
cd-vols=
no-issue=1
article-no=
start-page=13
end-page=32
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1984
dt-pub=19841126
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Pore Water Pressure in Sand Bed under Oscillating Water Pressure
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper the theoretical method to analyse the pore water pressures in the sand bed under the oscillating water pressure is developed. In the former researchs the validity of the theoretical treatment for the one-dimensional problem has been verified. However, the one-dimensional treatment is not sufficient to obtain the precise informations concerning the many practical problems. From this point of view, in this study, we derive the fundamental equations for the general three-dimensional sand layer under the oscillating water pressure. The validity of this theoretical method is verified by experiments for the twodimensional problems.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NagoHiroshi
kn-aut-sei=Nago
kn-aut-mei=Hiroshi
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=MaenoShiro
kn-aut-sei=Maeno
kn-aut-mei=Shiro
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

start-ver=1.4
cd-journal=joma
no-vol=19
cd-vols=
no-issue=1
article-no=
start-page=1
end-page=12
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1984
dt-pub=19841126
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=On the Bremsstranlung in High-Density Plasmas
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Emission and absorption coefficients of bremsstrahlung by high-temperature partially degenerate electrons are calculated for high-density plasmas where Coulomb coupling between ions is not weak. It is shown that the ion correlation substantially reduces these coefficients.
en-copyright=
kn-copyright=

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

affil-num=1
en-affil=
kn-affil=Department of Electronics
END