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Reduced contribution of hypertension to the risk of silent brain infarction in the elderly : a population-based study in Takahata, Japan
Get PDF論文(Article)The prevalence of asymptomatic ischemic brain lesions among the healthy elderly is high. We present a population-based cross sectional study of 240 subjects aged 70 years old (the Takahata Study), in which we have investigated the contributions of hypertension and other cerebrovascular risk factors to silent brain infarctions (SBI) in the elderly people. Of the 240 study subjects, 217 (90.4%) had SBIs. Hypertension was not significantly associated with SBIs. Further, diabetes mellitus, hypercholesterolemia, habitual drinking or smoking were also not associated with SBIs. We concluded that aging may weaken the association of hypertension and other risk factors with asymptomatic ischemic brain lesions
Case of Survival Without Intravenous Nutritional Support in an Adult with Short Bowel Syndrome
Get PDF論文(Article)We report a case of survival in the absence of intravenous nutritional support in an adult patient with short bowel syndrome, despite the very short length of the small and large intestine. Short bowel syndrome is defined as malabsorption resulting from anatomical or functional loss of the small intestine. The case is a-59-year- old woman who underwent resection of nearly her entire large intestine in response to Gardner Syndrome (familial polyposis) about 34 years previously at another hospital. About 30 years ago, at our hospital, she underwent a massive intestinal resection because of a mesenteric tumor. About 10 years ago, at our hospital, she underwent residual rectum about 12cm due to rectal cancer. The length of her residual small intestine and large intestine was ultimately 50cm length and 13cm length, respectively. From our experience, we emphasize that there are some cases of short bowel patients who do not require intravenous nutritional support and who can maintain themselves on enteral feedings
任意方向を有するNi-Cu系合金単結晶から導かれた磁歪常数について
Get PDF論文(Article)Magnetostriction constants, λ_, λ_ and λ_, of Ni-Cu alloys, having the comopsitions from 0 to 30.42% copper, are determined from the longitudinal magnetostriction of the single crystals with various orientations by means of an optical lever method. Saturation magnetostriction value of the polycrystalline sample, λ_s , calculated from the above mentioned constants changes linearly with the copper content , C , as λ_s = (-36.4+1.17・C) x 10^-6, which fact being in good agreement with the previous experimental results. Moreover, the coefficients of dipole-dipole interaction, introduced by Neel, are discussed by making use of the elastic parameters
スリット型流体抵抗器の静特性に関する研究
Get PDF論文(Article)Resistors are considered to be indispensable passive elements to make up pneumatic circuits and to invesngate characteristics of a fluid amplifier, but few resistors which have linear characteristics have been found. A new type resistor, slit type resistor, made of a brass bar is proposed in this paper. Slits are cut from the outer surface of the circumference to the center of the bar as many as possible. Supposing the cross section of a slit is a rectangle, the theory is obtained by considering all slits as the collection of rectangular tubes. Their static characteristics are almost linear and well confirmed the theory. These slit type resistors are easily made by machine tool, however, it is difficuit to make them in the case that the bar has a small diameter (under φ5). Therefore, it is convenient to connect the resistors with a large diameter to a tube with a small diameter. And then, several connectors such as enlargements and contractions are made, and static characteristics of these resistors are investigated. The results are summarised as follows: 1) It is desirable to narrow the width of a slit and to increase the depth and the number of it. 2) The length of resistors is desirable to be chosen about 35-65mm. 3) Series and parallel connection of these resistors are now available keeping the linear characteristics. In the series connection, the interval between each resistor does not affect the total resistance. Nor the branched angle does in the parallel connection. 4) Geometrical configurations of connectors do not affect the static characteristics though loss coefficient of pressure are large at low Reynolds number. 5) The change of the diameter of slender tubes does not affect the static characteristics to the extent (d_2)/(d_1
インダクタンス行列の実用因子合成
Get PDF論文(Article)Abstract This paper deals with a practical synthesis of the given inductance matrix L, which is real, symmetrical and non-negative definite generally, and further, needs to have such a rational zero-factor B as BL=O, where O is the zero-matrix. First, both of the connection (connection matrix D) and the linked coil-turns (coil-turn matrix n) of the realized magnetic part (network) are determined from this zero-factor. Especially, on the realized connection, the connection matrix, namely the 1-incidence matrix is found by Iri's synthetic algorithm of the unicellular matrix transformed from the zero-factor, where the unicellular one has all the elements equal to ± 1, or 0. Next, the reluctances w of the magnetic elements are decided by comparing the loop reluctance matrix involving the unknowns w with the inverse of the independent submatrix in matrix n-1Ln'-1
陰イオン交換樹脂カラムを用いるホワイトメタルの分析法
Get PDF論文(Article)A method was described for the determination of antimony, copper, lead and tin in white metal with anion exchange column. After 0.15g of sample had been dissolved in aqua regia,the obtained solution was treated to remove any nitrogen oxides and made up to 250 ml exactly with 1N HCl solution. 25 ml of the solution was poured into the anion exchange column(Dowex 1-X4, 6.0g), which had been conditioned with 1N HCl solution. Copper and antimony were eluted with 100ml of 1N HCl solution, while lead and tin were retained on the column. The eluate was concentrated to about one-fourth of its original volume in order that its HCl concentration was made 4N. The concentrated solution was poured into the another column(Dowex 1-X4, 8.0g), which had been conditioned with 4N HCl solution. Copper was eluted with 100ml of 4N HCl solution and then antimony was done with 200ml of 4N HCl solution. Lead was eluted with 200ml of 0.6N HCl solution from the column to retain lead and tin Subsequentiy, tin was stripped by elution with 50ml of 3M HNO_3 solution. Antimony was determined following iodometric titration and copper, lead and tin following chelatometric titration procedure. Its application to the determination of antimony, copper, lead and tin in white metal gave results agreeing closely with those by the JIS method and atomic absorption spectrometry. It took about 8 hr. to make an analysis by this method. This method was more rapid than JIS method
液体を電極とする放電現象の研究(第二報)液面上の放電円形に就いて
Get PDF論文(Article)When the electric discharge by the high voltage impulse strikes the surface of the liquid electrode, there appears a brilliant figure, so called Lichtenberg Fignre. This report contains such figures taken in photogram for many kinds of liquid and various concentration. Their sizes and forms are investigated, relating to impressed voltages, conductivity and kinds of the liquid etc. Also figures for the high voltage and high frequency electric wave are studied
知的CIAのためのLispシステムの開発
Get PDF論文(Article)Abstract A LISP programming language is implemented in a micro-computer system for the application to the intelligent CAI, because the language make easy to program of tutorial dialogues and the matching of numerical formulas. The CPU and OS of this system are MC68000 and CP/M-68K respectively. The LISP implemented here is a subset of Utilisp from the viewpoint of external specification. So the users can make use of the system for general symbolic manipulation. The terminal of this system is PC-980lF/M personal computer. Its cost is low because the I/O routine is almost implemented in the terminal. This paper is written about the features of this system such that its construction, the excution time and the flow for developing application programs
珪砂の洗浄に関する研究
Get PDF論文(Article)Various washing experiments of silica sand were carried out using a horizontally shaking vessel with circulating motion to produce the singing sand. The silica sands used were from Osodani in Iide town. The degree of cleanness of washed silica sand was evaluated by measuring sound pressure emitted from the sand bed into which a glass rod was penetrated. The silica sand to obtain the singing sand which emits a squeak required washing time longer than about 200 hours. The washing time was found to be reduced by the addition of sodium dodecyl sulfate and the pretreatment of ultrasonication. Characterization of the removed particles by washing revealed that the particles adhered to silica sand were the fine particles of silicate mineral with the size range of 0.2～100μm
有極形メカニカル・フィルターの一，二の構成法について
Get PDF論文(Article)This paper describes some design methods fo a mechanical filter with attenuation-poles realized by pure mechanical constructions. In section 1 and 2, the mechanical filters with attenuation-poles which are obtained by the introduction of a mechanical coupling between no-neighbouring resonators of a mechanical filter, are expressed. The mechanical filters of which end-vibrators are anti-resonators are given in section 3 The authors, in section 4, show the more complicated mechanical filters. The electrical equivalent circuits of the center part of the mechanical filters in section 4 are parallel shunt circuits consisting of a series resonant circuit and either a capacitance or a inductance. And the authors make lists of concret mechanical filters designed by the combinations of various modes of mechanical vibrations