result 969 件
| Author | Sawahara, Masahiko| |
|---|---|
| Published Date | 1987-02-28 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue1-2 |
| Content Type | Journal Article |
| Author | Takahashi, Kenji| |
|---|---|
| Published Date | 1987-02-28 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue1-2 |
| Content Type | Journal Article |
| Author | Tsuchiya, Masao| |
|---|---|
| Published Date | 1987-02-28 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue1-2 |
| Content Type | Journal Article |
| Author | Fujikawa, Nobumasa| |
|---|---|
| Published Date | 1987-02-28 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue1-2 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/15811 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_20_1_45.pdf |
| Author | Korenaga Takashi| Moriwake Tosio| Takahashi Teruo| |
| Abstract | A simple system was developed for the fully automatic and continuous measurement of chemical oxygen demand (COD) in wastewater samples based on colorimetry of dichromate. A sample and a solution of sulfuric acid (1+1) containing 2mM potassium dichromate are continuously pumped with a double-reciprocating micro-pump at each flow rate of 0.3 ml/min. The wastewater sample is filtered at first with a 100-mesh stainless filter and then mixed with the dichromate solution in the mixing joint. The mixture is introduced into a reaction coil made of poly(tetrafluoroethylene) tubing (1 mm i.d., 3 mm o.d., and 20 m length), being placed in an oil bath (120℃). After reaction, the mixture passes into a quartz tubular flow-through cell (10 mm path length, 18 μl volume) in a spectrophotometer, and the absorbance is measured at 445 nm. The COD value of the sample is automatically estimated from the amount of decreased absorbance. The system was successfully applied to COD measurement of some waters, and to continuous monitoring of COD in wastewater of university laboratories. The system was also evaluated by comparing with the flow injection analyzer system previously developed by the authors. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1985-11-08 |
| Volume | volume20 |
| Issue | issue1 |
| Start Page | 45 |
| End Page | 52 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307695 |
| JaLCDOI | 10.18926/15775 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_18_1_101.pdf |
| Author | Mori Chuji| Hattori Susumu| |
| Abstract | In stereo matching of images, sample cross-covariances are used commonly as a criterion for deciding whether matched points are truly conjugate. Hereupon window width is a serious parameters to dominate matching stability. This paper argues about relation of matching stability with window width in terms of statistical behavior of sample covariances. For simple circumstances of analysis auto-covariances of a single image are considered instead of cross-covariances of stereo ones. First the mean and variance of sample auto-covariances are derived with parameters, window width and positional lag. Secondly they are evaluated from the correlation function estimated on an aerial image under the assumption of ergodicity to observe how they vary according as two parameters vary. From this result a variation factor is proved usefull to estimate appropriate window width. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-03-30 |
| Volume | volume18 |
| Issue | issue1 |
| Start Page | 101 |
| End Page | 110 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307207 |
| JaLCDOI | 10.18926/15765 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_15_1_111.pdf |
| Author | Korenaga Takashi| Ikatsu Hisayoshi| Moriwake Tosio| Takahashi Teruo| |
| Abstract | On the flow injection analysis (FIA) of chemical oxygen demand (COD), silver salt was added as an oxidation catalyst for COD substances and a masking agent for halide to improve operating conditions of the FIA apparatus. Both of a proper concentration of potassium permanganate solution and 6.0 % sulfuric acid solution containing 0.1 % silver nitrate are individually pumped up with respective flow rates of 0.51 ml min(-l) and merged into a carrier stream. A 20 μ1 of sample solution is injected into the flow of sulfuric acid solution at just before the merging place. The sample mixed with the carrier solutions in a reaction manifol(polytetrafluoroethylene tubing: 0.5 mm i.d. x 30 m), is passed through a thermostated bath at 100 °c and led to a flow cell for the absorbance measurements at 525 nm. The absorbances are continuously recorded with time. The peaks in the recordings showed good reproducibility and the calibration obtained at a linear concentration range of 0 - 170 mg 1(-1) COD with glucose as standard. The detection limit and precision confirmed with this method were 5 mg 1(-1) and 0.8 %, respectively. Chloride ion up to 200 mg 1(-1) did not interfere without elimination of a silver chloride precipitate. By the present FIA method, several industrial waste water samples were analyzed at a sampling rate of about 40 samples per hour, and their apparent COD values were compared with those found by the manual JIS method. Both of the methods gave the similar results within an error range from -35 to +5 %. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1980-11-29 |
| Volume | volume15 |
| Issue | issue1 |
| Start Page | 111 |
| End Page | 121 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307490 |
| JaLCDOI | 10.18926/15752 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_14_2_119.pdf |
| Author | Korenaga Takashi| Ikatsu Hisayoshi| Moriwake Toshio| Takahashi Teruo| |
| Abstract | A new method based on the principle of flow injection analysis is presented for the semiautomated determination of chemical oxygen demand (COD) in environmental water samples. The method is rapid and continuous, and suitable for the monitoring of COD in wastewaters. The apparatus used was simply constructed by parts commercially available for high performance liquid chromatography. Teflon tubing heated with a boiling water was used as a reactor and simultaneously used for mixing coils and transmission lines. The operating conditions were examined to apply the determination of COD in wastewaters by using glucose as a standard COD substance. The procedures recommended are as follows: Both 4.9x10(-4) M potassium permanganate and 6.7 % sulfuric acid solutions are individually pumped, 20 μl of a sample solution is injected into the flow of the sulfuric acid solution, and then mixed with a mixing joint. The mixed solution is transported to a flow cell situated in a spectrophotometer fixed at a wavelength of 525 nm, and decrements of absorbance are recorded. The peaks were reproducibly obtained at a concentration range of 10 - 200 mg-COD 1(-1). Chloride up to 1000 mg 1(-1) was not interfered at all. Various wastewater samples were analyzed by the proposed method at a sampling rate of 30 samples per hour, and the apparent COD values obtained were compared with the manual COD ones obtained by JIS method. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1980-03-01 |
| Volume | volume14 |
| Issue | issue2 |
| Start Page | 119 |
| End Page | 129 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307775 |
| JaLCDOI | 10.18926/15743 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_14_2_23.pdf |
| Author | Tanada Yoshihiro| Sano Hiroya| |
| Abstract | This paper describes a method for measuring very small transmission loss of impulsive signals. The correlative fluctuations within input and output signals are eliminated effectively by the analog simultaneous differencer. The difference and normal signals are alternately sampled and accumulated by the digitizer and the microcomputer, that is, the microcomputer 2-channels box-car integrator is realized. The difference and normal accumulated data are transferred to the personal computer, which calculates the ratio of the difference to normal accumulated data, i.e. the estimated attenuation in nepers. By the experiments of electrical and optical impulse transmissions, the minimum measurable attenuations become respectively 2.7×10(-4)NP and 6.0×10(-4)Np. Even the latter value is the smallest so far as the authors know. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1980-03-01 |
| Volume | volume14 |
| Issue | issue2 |
| Start Page | 23 |
| End Page | 31 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307200 |
| JaLCDOI | 10.18926/15735 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_14_1_9.pdf |
| Author | Fujiwara Yasuo| Monobe Kazuo| |
| Abstract | In the course of the study of polymer crystallization at high pressure, oriented crystallization of extended chain crystals of polyethylene were examined. Molten polyethylene were extruded into a die at a few hundred atm, and follwed by crystallization by high pressure application above 3000 atm. Resulting sample shows chain orientation to extruded direction. Thick lamella nearly a few thousand angstrom, which are typical feature of high pressure crystallization, were observed to be stacked parallel each other. In spite of favorable condition for crystals to grow to chain direction, remarkable growth to normal direction to them were also observed. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1979-12-01 |
| Volume | volume14 |
| Issue | issue1 |
| Start Page | 9 |
| End Page | 14 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307317 |
| JaLCDOI | 10.18926/15733 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_12_129.pdf |
| Author | Myojin Syo| Tatsuta Akira| Taka Yasuhisa| Asai Kazuhiko| |
| Abstract | A statistical analysis is applied to find what states of "block" are dangerous from view point of traffic accident. Here, the block is defined to be an area surrounded by some major streets and is feeded by a minor street network. The accidents under study are those which occur in the whole minor street network. They are grouped into three kinds; pedestrian, vehicle and the gross accidents. And each is classified to three types according to the place where the accident occurs. At the beginning 22 variables are assumed to state a certain relationship of some states of the block with the occurrences of accidents and 12 variables are found significant finally through factor analysis. Further examination has reached several key variables that migth have something significant to cause traffic accidents in the block. The key ones are the number of lanes of street and the number of legs of intersection, especially nearly 2 lanes street and 3-leg intersection, respectively. The case study was carried out on 26 blocks sampled from Osaka City. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1978-02-25 |
| Volume | volume12 |
| Start Page | 129 |
| End Page | 139 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307311 |
| JaLCDOI | 10.18926/15697 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_5_61.pdf |
| Author | Misaki Takayoshi| Okamoto Takuji| Yamamoto Hideki| |
| Abstract | An asynchronous delay line for PAM signal having controlled delay capability is proposed. The delay line in a cascaded chain of identical memory cells. Each sample of the sequence of the input PAM signals passes or is shifted in particular cell depending on whether the succeeding cell is empty or not. A cell is composed of two memory capacitors with the peripheral control circuits. In this paper, especially, an example of the circuit for cell is shown and its several characteristics are discussed. At the end, some experimental results are given. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1970-09-01 |
| Volume | volume5 |
| Issue | issue1 |
| Start Page | 61 |
| End Page | 66 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307866 |
| JaLCDOI | 10.18926/15649 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_1_43.pdf |
| Author | Kaneda Masahiro| |
| Abstract | This paper deals with a parameter estimation method which yields the more suitable estimate of the parameter using noisy data or measured values. The estimation method is one that uses a kind of a weighted mean, and weighting at taking a weighted mean is interested in particularly. That is to say, as the grade of 'more suitable' depends upon the weighting, we can obtain the more suitable estimate by choosing the weighting coefficients suitablly. When the function which yields the estimate using finite measured values, i.e., the estimator is a particular form, sub-optimal weighting in the practical sense is discussed. Here, the concept of 'optimal' implies that the variance of the final estimate is minimum. And the particular form is one that both the denominator and the numerator of the estimator are first order formulas or second order formulas of finite measured values. And two theorems in relation to this problem are proposed and proved. Moreover, for an exsample of application of these theorems, a parameter estimation method is dealt with, which estimates the parameters of the pulse transfer function of a control system using the sampled measured values of the impulse response of that system. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-07-10 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 43 |
| End Page | 48 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307213 |
| JaLCDOI | 10.18926/15572 |
|---|---|
| Title Alternative | A NEW COLORIMETRIC DETERMINATION OF BORIC ACID, BORIC ACID AND FLUORINE CONTENTS OF THERMAL WATERS IN TOTTORI PREFECTURE. |
| FullText URL | 006_034_038.pdf |
| Author | Ashizawa, Takashi| |
| Abstract | A new colorimetric method of determination of boric acid was devised, using ion-exchange resin, mannit and bromthymolblue. With this method determination of boric acid becomes capable by adding one ounce of mannit and ten cc. of resin to an ordinary set for the investigation of mineral waters. This method is suitable for the waters.containing little amount of boric acid and for the samples of small amount. Thermal waters in Tottori Prefecture contain four mg of fluorine and ten mg of metabolic acid per liter in average. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-03 |
| Volume | volume6 |
| Start Page | 34 |
| End Page | 38 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307833 |
| JaLCDOI | 10.18926/15563 |
|---|---|
| Title Alternative | DIRECT COLORIMETRIC AND DIRECT TITRIMETRIC DETERMINATION OF CALCIUM WITH NEW REAGENT (SUPPLEMENTARY REPORT) |
| FullText URL | 006_015_019.pdf |
| Author | Ashizawa, Takashi| |
| Abstract | The author improved the accuracy of the direct colori metric method of calcium determination with azocal-A using an electrophotometer and made an investigation of interfering ions concerning this method. With this improved method calcium content of 0.2-several mgs per liter can be determined using only 5cc. of river water sample with an error of 土10%. Only 2 minutes are enough for a single determination and this method surpassed the ordinary oxalate method in accuracy. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-03 |
| Volume | volume6 |
| Start Page | 15 |
| End Page | 19 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307466 |
| JaLCDOI | 10.18926/15536 |
|---|---|
| Title Alternative | A STUDY ON THE PHOSPHOR CONTENT IN MISASA SPA |
| FullText URL | 006_001_003.pdf |
| Author | Umemoto, Shunji| |
| Abstract | The phosphor contents of well-water,spring-water and soil were measured semiquantitatively. The phosphor content is relatively high in the sampls from the thermal spring district than in that from the surrounding. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-03 |
| Volume | volume6 |
| Start Page | 1 |
| End Page | 3 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307782 |
| JaLCDOI | 10.18926/15534 |
|---|---|
| Title Alternative | MICROANALYSIS OF ALUMINUM AND IRON. |
| FullText URL | 005_076_081.pdf |
| Author | Ashizawa, Takashi| |
| Abstract | アルミニウムと鉄の満足な分離定量法は,現在知られていない.微量のアルミニウムの定量法としては,各種色素のレーキ生成による比色法もあるが,最も優れた方法はオキシン法である.鉄定量は専ら各種の比色法又は容量法に依っているが,微量の場合は実際にはロダン法が用いられている.食塩泉に存在 する様な,1l中数mg以下の,アルミニウム及び鉄の実用的な分析方法を確立する必要を感じ,従来法を改良し,満足な結果に到達した.鉄はロダン法又はサリチル酸法,アルミニウムはヘマトキシリン,又はアルミノン,オキシン法が用いられた.本法の特徴は,鉄をロダン錯塩としてアミルアルコールで完全に抽出し定量し,残液でアルミニウムをアルミノン,オキシン等で定量する一貫した方法であることにある.現在のアルミノン法は鉄の妨害のために実用化されていない.鉄の定量の際の弗素の影響は余り関心を持たれていないが,温泉水には著量の弗素を含むものがある.それでこの妨害を避けて,サリチル酸法に硝酸トリウムを用い,正確に,比色する方法を考案した. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1951-08 |
| Volume | volume5 |
| Start Page | 76 |
| End Page | 81 |
| ISSN | 0369-7142 |
| Related Url | http://eprints.lib.okayama-u.ac.jp/15926 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307272 |
| JaLCDOI | 10.18926/15529 |
|---|---|
| Title Alternative | STUDIES ON THE VITRIOL SPRINGS. (6) |
| FullText URL | 005_051_054.pdf |
| Author | Ashizawa, Takashi| |
| Abstract | a) Colorimetoric determnation of the minute amount of antimony and antimony contend of Yanahara Hot Spring. To 5cc of sample soln., not containing the second family other than antimony. add 0.2 cc of 10% polyvinyl alcohol aqueous solution. Adjast HCI eoncentration to approximately I. N. Add I cc of hydrogene sulfide solution and sbake. Then measure the reruting yellow or orange color by photometer. Antimony content of Yanahara Hot Spring was 0.1±0.03 g per liter by the above mentioned method. b) Quantitative determination of the free mineral acid. Precipitate iron and aluminium as complex fluorine salts and change the sulfate ion into alkali sulfate, so that it can not liberate free acid. Then titrate with alkali using phenol red as an indicator. c) Iron and coprer in thermal waters and minerals of Yanahara Hot Spring. Ferous ion content of Yanahara Hot Spring (60℃) was 14.6g per liter and its copper content was 0.44g per liter. both being the highest record in Japan. A green and a bluish green minerals ware found, crystalyzed near the Hot Sprig. The latter was apisanite (Cu(0.25) Fe(0.75) S0(4・8.8) H(2)O) and the former proved to be a pure melanterite (Fe S0(4).7H(2)O). d) A modified method to detect sulfides of the second family. Using zinc-amalgam the author succeeded to avoid the liberation of sulphur and to detect the yellowish or orange colored sulfides, such as ausenic, antimony or tin sulfide. e) Paper chromatography applied to the analysis of heavy metals in vitriol waters. 4 kinds of vitiol waters were investigated. Paper chromatography proved to be excellent in detecting the metals of the second family, such as tin, antimony, and ansenic. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1951-08 |
| Volume | volume5 |
| Start Page | 51 |
| End Page | 54 |
| Related Url | http://eprints.lib.okayama-u.ac.jp/15926 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307813 |
| JaLCDOI | 10.18926/15503 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_25_2_9.pdf |
| Author | Mikuni, Masato| Hida, Moritaka| Nishida, Norihide| Sakakibara, Akira| Yamada, Masuo| |
| Abstract | Strains induced in the Si substrates by TiN film were observed with X-ray topography. The image of the sample with TiN film 0.45μm thick was like that of a dislocation loop observed with transmission electron microscope. The images of the samples with TiN films 1.65, and 1.9μm thick were different; blackening spreaded in the <112> and <110> direction from the ring contrast in shape of four-lobed rosette pattern. Spreading extended 1.6 times longer than the radius of the ring contrast along the <112> direction. The strain field extended 0.1μm in depth from the top surface where TiN was plated. From the topographs of bent Si beam, it was found that the blackness was almost proportional to the strain. The strains induced by TiN film locally ion-plated were smaller than those observed previously when TiN was ion-plated on the whole top surface of the substrate. Fine structures were observed in the topographs which could not be explained by the kinematical theory. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1991-03-28 |
| Volume | volume25 |
| Issue | issue2 |
| Start Page | 9 |
| End Page | 15 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307429 |
| JaLCDOI | 10.18926/15480 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_25_1_1.pdf |
| Author | Gao Hong| Wada, Tsutomu| Noritsugu, Toshiro| |
| Abstract | How to reduce and simplify the calculation for image recognition is a very attractive and important issue in order to realize the real time control of a robot based on the image recognition results. This paper describes a method of extracting 2 - dimensional geometrical features of cubic objects based on the normal vector distributions from the visual information obtained with the laser range finder to reduce the calculation of the image recognition. In this research a laser beam is scanned in the horizontal plane to which the cubic objects stand vertically and the laser spot is detected with a TV camera every sampling time. These spots make an intermittent locus which includes some special lines corresponding to the cubic objects. To extract the features of the cubic objects, we utilize the normal vectors formed on the locus. If some normal vectors distribute in the same direction and the origin of the normal vectors are very close to their neighbor's, these normal vectors can be classified into the same class, -the straight line class. Because the normal vectors on the neighbor surfaces of the cubic objects are vertical to each other, we use this property to determine the pair of straight lines which belong to the cubic objects. Making the histogram based on the normal vectors with the same direction, we obtain the peaks which are supported by the points on the cubic object surfaces. Then, the points can be extracted from the set of points on the whole locus inversely according to the relations with the peaks and the features of the cubic object can be extracted by applying method of least square to these extracted points. The experiments proved the availability of the proposed processing algorithm. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1990-12-14 |
| Volume | volume25 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 13 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308010 |
