JaLCDOI 10.18926/15785
FullText URL Mem_Sch_Eng_OU_19_1_33.pdf
Author Taniguchi Takeo| Soga Akira|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1984-11-26
Volume volume19
Issue issue1
Start Page 33
End Page 44
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307352
Author Toyoda, Kazuhiro| Hikichi, Yasufumi| Takeuchi, Shigeharu| Kuroda, Tomohisa| Okumura, Ako| Nasu, Yoshiko| Okuno, Tetsuro| Suzuki, Kazumi|
Published Date 2004-02
Publication Title 岡山大学農学部学術報告
Volume volume93
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/12834
FullText URL 13_097_101.pdf
Author Khan Md. Harunor Rashid| Md. Mohiuddin| M. Rahman|
Abstract Non-symbiotic diazotrophic systems for biological nitrogen fixation (BNF) in agriculture are most promising but the possibility for the extension of nitrogen fixation by rice is still speculative. Accordingly, the present study was conducted for the Enumeration, isolation and identification of nitrogen fixing bacterial strains at seedling stage (30 days after seed sowing) in rhizosphere of rice (BR 10, Oryza sativa L.) grown in Non-Calcareous Grey Flood Plain soil of Bangladesh. The soil is classified as ‘Inceptisol’ order and ‘Aquept’ suborder. It was identified as ‘Dhamrai series’, had ‘silt’ texture, pH 7.1 and 5.5 C/N ratio. The present results of the microbial tests on the rice rhizosphere soil evinced that out of 263 isolates, only 91 were branded as nitrogen fixing organisms per gram of soil, which was about 34.6 % of the total isolates. As per selection criteria, four individual strains were considered for identification. Biochemical tests were conducted for proper identification and the selected strains were identified as Enterobacter spp., Klebsiella spp., Bacillus spp. and Azospirllum spp.
Keywords Azospirllum spp. Bacillus spp. diazotrophs Enterobacter Spp. Klebsiella spp. and Oryza sativa.
Publication Title 岡山大学環境理工学部研究報告
Published Date 2008-03
Volume volume13
Issue issue1
Start Page 97
End Page 101
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002304761
JaLCDOI 10.18926/58041
FullText URL biess_4_124_133.pdf
Author KIM, Dong Kwang|
Abstract Okayama University has seen recently an upsurge in the number of courses taught in English. While students generally like the English-medium courses for the abundance and novelty of information available in them, they tend to show hesitance to participate, which sometimes leads to dissatisfaction with the courses. International faculty members also feel something is amiss because they do not understand why students fail to be responsive. Clearly, enhancement of student participation and mitigation of the alienating teaching experience of international faculty are challenges to effective administration of global studies. To that end, the quiet cultivation of optimal demographics for Englishmedium courses is currently the most effective strategy.
Keywords global studies English-medium courses Japanese student participation international faculty experience factors enhancing participation
Publication Title Bulletin of Institute for Education and Student Services, Okayama University
Published Date 2019-12-30
Volume volume4
Start Page 124
End Page 133
ISSN 2432-9665
language 日本語
File Version publisher
NAID 120006812107
Author Fujita, Keiko| Suzuki, Tomoko| Hasegawa, Sachiko| Meguro, Akane| Sugiura, Hiroyuki| Toyoda, Kazuhiro| Shiraishi, Tomonori| Sakaguchi, Ei| Nishimura, Tomio| Kunoh, Hitoshi|
Published Date 2010-02-01
Publication Title 岡山大学農学部学術報告
Volume volume99
Issue issue1
Content Type Departmental Bulletin Paper
Author Mitsunobu, Fumihiro| Hosaki, Yasuhiro| Ashida, Kozo| Iwagaki, Naofumi| Fujii, Makoto| Takata, Shingo| Hamada, Masanori| Tanizaki, Yoshiro|
Published Date 2004-12-01
Publication Title 岡大三朝医療センター研究報告
Volume volume75
Content Type Departmental Bulletin Paper
FullText URL 137_079_090.pdf
Author Takatsuka, Shigenobu|
Abstract The current state of English as a Lingua Franca (ELF) used in communication between nonnative speakers of English seems to require a change in the way English is taught and learned. However, English has still been taught and learned as a foreign language as ifit were mainly used in communication with its NSs. This article attempts to review some ofthe recent advances in ELF research and then to draw their pedagogical implications.
Keywords English as a Lingua Franca (ELF) English as a Foreign Language (EFL) interlanguage theory ELF core accommodation skills
Publication Title 岡山大学教育学部研究集録
Published Date 2008-02-25
Volume volume137
Issue issue1
Start Page 79
End Page 90
ISSN 0471-4008
language 英語
File Version publisher
JaLCDOI 10.18926/15359
FullText URL Mem_Fac_Eng_OU_34_19.pdf
Author Okada, Akira| Uno, Yoshiyuki| Okajima, Isao|
Abstract In EDM, the machining characteristics greatly depend on the energy distribution. Therefore, it is very important to clarify the energy distribution for understanding various phenomena in EDM. In this paper, the energy distribution in EDM with graphite electrode is investigated by measuring the temperatures of electrode and workpiece. Experimental analysis shows that the material removal rate depends on energy density while the electrode wear greatly depends on the adhesion of heat resolved carbon from machining fluid, and the energies distributed into electrode and workpiece are almost constant regardless of pulse duration.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2000-03-27
Volume volume34
Issue issue1-2
Start Page 19
End Page 26
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307707
Author Park, Yangwon| Baba, Naomichi|
Published Date 2003-02
Publication Title 岡山大学農学部学術報告
Volume volume92
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15053
FullText URL 027_103_121.pdf
Author ZAW SOE MIN|
Publication Title 岡山大学大学院社会文化科学研究科紀要
Published Date 2009-03-26
Volume volume27
Issue issue1
Start Page 103
End Page 121
ISSN 1881-1671
language 英語
Copyright Holders 岡山大学大学院社会文化科学研究科
File Version publisher
NAID 120002307304
Author Matsubara, Sachiko| Yamamoto, Masatoyo| Jo, Man Hyun| Murakami, Kenji|
Published Date 1998-02
Publication Title 岡山大学農学部学術報告
Volume volume87
Issue issue1
Content Type Departmental Bulletin Paper
Author Tsuji, Takehito|
Published Date 2004-02
Publication Title 岡山大学農学部学術報告
Volume volume93
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15383
FullText URL Mem_Fac_Eng_OU_30_1_89.pdf
Author Totsuji, Chieko| Sanaka Yoshiaki| Totsuji, Hiroo|
Abstract Based on the tight-binding method, electronic bands of the mixed perovskite oxides are calculated in order to develop the electronic theory of ferroelectric phase transitions in these mixtures which are difficult to describe within the phenomenological theories. Diagonal elements of Hamiltonian matrix of parent materials are assumed to differ by 0.1eV and mixtures are simulated by lattices of supercells containing 2(3) = 8 or 3(3) = 27 unit cells randomly assigned to either material. The width of the conduction and valence bands have maxima and the band gap has a minimum at intermediate mixing ratio. Results are in agreement with those of other analyses on random systems and even 2(3)-cell computation seems to serve as a first approximation for our purpose.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1995-12-28
Volume volume30
Issue issue1
Start Page 89
End Page 97
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307957
JaLCDOI 10.18926/20011
FullText URL Mem_Fac_Eng_OU_29_1_7.pdf
Author Hiroyuki Tachibana| Totsuji, Hiroo| Nara, Shigetoshi| Totsuji, Chieko|
Abstract Effects of interface fluctuations on the electronic states in semiconductor quantum dots are analyzed on the basis of numerical solutions for ground state wave functions and energy eigenvalues. It is shown that the effective volume of confinement becomes smaller than the real volume of quantum dots due to fluctuation. This effect comes from the fact that the wave functions with larger characteristic wavelength are not able to deform themselves following the fluctuation of interfaces exactly.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1994-11-30
Volume volume29
Issue issue1
Start Page 7
End Page 14
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002310741
JaLCDOI 10.18926/15395
FullText URL Mem_Fac_Eng_OU_27_1_65.pdf
Author Nara, Shigetoshi| Hara Yuji| Totsuji, Hiroo|
Abstract Quantum mechnical electron wave transfer between two quantum wires which are weakly coupled via a thin potential barrier is considered. The total electronic states are calculated with both analytical ( no field case ) and numerical methods ( under applied electric fields ). The transfer efficiency is evaluated for several specified cases of geometrical structures, potential barrier heights and the externally applied electric field. Estimated trasfer time is of the order of one picosecond in typical mesoscopic structures. The model in this paper can be used to determine important structure parameters for experiments on electron directional coupler controled by external elctric field.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1992-11-25
Volume volume27
Issue issue1
Start Page 65
End Page 79
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307405
Author Takagi, Shigeaki| Yoshida, Toru| Takagi, Toshio|
Published Date 1985
Publication Title 岡山大学農学部学術報告
Volume volume65
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/14150
FullText URL Mem_Fac_Eng_39_1_46.pdf
Author Kadono, Keisuke| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo|
Abstract We present a real-space, polynomial-expansion approach to electron dynamics in nanostructured semiconductors. The Chebyshev expansion method is employed for efficient calculation of timeevolution of single-electron wave function. Details of the formulation are described. The method is applied to the electron transport in nanostructured semiconductors such as Si nanowires. The mean-square displacement and diffusivity of electron in Si chains are obtained as functions of length of the chains. The results show clearly ballistic behavior of electron in the pure Si chain.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2005-01
Volume volume39
Issue issue1
Start Page 46
End Page 51
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002308231
Author Itano, Arao| Tsuji, Y.|
Published Date 1934-05-09
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Forschungen
Volume volume6
Issue issue2
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/15767
FullText URL Mem_Sch_Eng_OU_18_1_43.pdf
Author Ohzuku Tsutomu| Hirai Taketsugu|
Abstract An equation on the current-polarization voltage characteristics of single charge transfer redox reaction on a rotating disk electrode (RDE) was given and a curvefitting method to determine kinetic parameters from an observed polarization curve was proposed therefrom. The method was demonstrated for Fe(2+)/Fe(3+)redox reaction in acidic aqueous electrolyte on Pt-RDE and the limitation of the method was discussed. The extension of the method to multistep charge transfer reaction was also considered.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1984-03-30
Volume volume18
Issue issue1
Start Page 43
End Page 56
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307914
JaLCDOI 10.18926/15768
FullText URL Mem_Sch_Eng_OU_18_1_57.pdf
Author Ohzuku Tsutomu| Sawai Keijiro| Hirai Taketsugu|
Abstract Basic kinetic equations of chronopotentiometric potential-time curves, in which the equations for reversible, quasi-reversible and irreversible electron transfer process appeared in special cases, were given and a chronopotentiometric method for determining kinetic parameters was proposed therefrom. The method was demonstrated for Fe(3+)/Fe(2+) redox reaction in acidic aqueous media. The limitations of the method and the double-layer charging effects on the potential-time curve were discussed. The extension of the method to more general electrode processes was also considered.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1984-03-30
Volume volume18
Issue issue1
Start Page 57
End Page 73
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307985