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H形振動子とその応用
Get PDF論文(Article)This paper deals with theoretical and experimental results on small H-shape resonator and its applications to a mechanical filter in low frequericies. Two parallel arms of the H-shape vibrator contribute to the resonant system as moment of inertia of rigid bodies, and each arm vibrates only a few minutes of arc around its own nodal axis. On the other hand, the cross bar connecting both arms acts as a stiffness to the resonant system. First, a method of theoretical analysis by equivalent electrical network on the H-shape resonator is described and then equation of resonant frequency is derived. Secondly, some convenient diagrams for designing resonators are shown, and some conditions of design for obtaining the resonator of minimum dimension are discussed. Lastly, some experimental results of the mechanical filters consisting of the H-shape resonators are related. A theoretical equation for deciding the nodal points of H-shape resonator, moreover, is given in appendix
Algebraic Fundamental Laws About Time Variable in Electric Netwaorks
Get PDF論文(Article)L,C,Rの電気回路に電圧或は電流で与えたインパルスが不規則に入つた場合の現象の瞬間値を純代数的に求める理論の構成の可能性の証明，方針，原理，必要な新しい物理概念，一般法則，簡単な例を述べ，可能性を簡単な揚合に実証した
高周波加熱縮合による樹脂加工の研究
Get PDF論文(Article)This paper describes the new method for the resin finishes which is entirely popular of synthetic textile engineering, and contains the following items. [Ⅰ] Introduction [Ⅱ] Preparations of samples and high frequency treatment. (sample), (method of resin finishing), (electric field of high frequency) [Ⅲ] Testing methods of samples. (measurement of the degree of crease resistance) (measurement of the quantity of the adherent resin) [Ⅳ] Results of Expriment. (1) dielectric properties of samples (2) effect of heating time (high frequency treatment) (3) effect of progress time (after press of sample) (4) effect of movement and revolution of sample under the high frequency field (5) effect of external temperature (life of resin liquid by external temparature variation) (temperature rising of sample surface) (tempetature effect upon the crease resistance) [ⅴ] Discussio
音片振動子の共振尖鋭度に関する実験的考察
Get PDF論文(Article)This is a report of some experimental results on the resonance sharpness of frequency standard vibrator ”Onpen”, a Free-Free-Bar vibrating transversely to its long axis. From the experimental results, some relations of the Q with many factors such as materials, dimensions, constructions, natural frequencies, heat treatment, has been made clear
Friedel-Crafts Type Reaction of Chlorothiophenes with Aromatic Compounds and Its Application to the Syntheses of Aryl-and Oligothiophenes
Get PDF論文(Article)Chlorothiophenes react with active aromatic compounds in the presence of AlCl3 under mild conditions, yielding the corresponding arylthiophenes. Similarly, chlorinated bi-and terthiophenes are produced as the main products in the AlCl3-catalyzed self-condensation of the chlorothiophenes. The reactions are discussed in terms of an ionic mechanism involving the thiophenium ions produced by the protonation of the chlorothiophenes. Versatility of the products for the syntheses of arylthiophenes, mixed thiophene-arene oligomers, and oligothiophenes is also demonstrated
テルル薄膜トランジスタ
Get PDF論文(Article)Some preliminary studies to form Te TFT having fine characteristics are described Voltage-current characteristics of coplanar diodes made of deposited Te and metal films show that Co, Ni, Au and In make good ohmic contact to Te film and seem to be suitable to the source-drain electrode while Al or Cr makes blocking contact. Investigation on Hall mobility of Te film of a thickness range of 200-2000Å exhibits that the mobility increases with film thickness from about 2 up tO 20 cm^2/v sec. The T^ temperature dependence of Hall mobility exhibits the ion scattering is dominant below 70℃. Increase of Hall mobility by the application of gate field is observed as seen in the case of CdSe film. Te TFT's have been formed on glass substrate depositing Au, Co, or Al source-drain electrode, 170-180Å Te layer, SiO insulator layer of 1000Å thickness and Al gate electrode in order. Mutual conductance of Te TFT is 200-1880μυ for the Au and Co electrodes, but very small Gm and large hysteresis for Ai source-drain electrode
Clinoptilolite の吸着能 III 酸処理効果とそのガスクロマトグラフィーによる検討
Get PDF論文(Article)Clinoptilolite (occured in Itaya, Yamagata pref.) was dried after boiling HCl aqueous solution, and the effects of treatment toward the surface area of clinoptilolite and the gas chromatogram with several organic and inorganic gases were studied. The results were as follows; 1. Surface area did not increase so much by acid treatment. 2. The surface area of 0.5 N HCl treated clinoptilolite dried at 120℃ was the same as that of untreated one dried at 300℃. This property is a merit of clinoptilolite when used as an adsorbent. 3. When acid treated clinoptilolite was used as the column packing of gas chromatograph, each Components of gas mixed O_2, N_2, CH_4 and CO, were seperated clearly at room temperature, satisfactrily sharp. 4. Inserting the experimental data and the chromatographic peaks were to van Deemter's equation. it was found that the rate of diffusion of the above gases into clinoptilolite was increased by acid treatment. 5. The separation of lower hydrocarbons, CH_4, C_2H_6, C_3H_8, iso-C_4H_ and n- C_4H_ was also possible by the use of acid treated clinoptilolite packing. The heat of adsorption of these gases showed that this mechanism of separation was not caused by molecular sieve effect of clinoptilolite
A New Synthesis of Isocoumarins via π-Olefin-Palladium Complex
Get PDF論文(Article)Abstract The reaction of sodium salts of 2-alkenylbenzoic acids with lithium tetrachloro-palladate (II) afforded isocoumarin derivatives. This cyclization reaction is though to proceed by a palladium-assisted nucleophilic attack on the olefin of the alkenyl groups. 2－アルケニル安息香酸のナトリウム塩と塩化パラジウム酸パラジウムとの反応は，イソクマリン誘導体の生成に導いた。この分子内閉環反応はアルケニル基のオレフィンに対するパラジウム触媒による親核的な攻撃により反応は進むと考えられる
音さ濾波器と音片濾波器に関する二三の実験
Get PDF論文(Article)In the present paper, the data on electro-mechanical vibrators and filters are presented and discussed. The vibrators are of a tuning-fork or a tuning-bar type, and the filters are of various types of Riegger's connection or lattice construction, having a narrow band pass frequency character. The numerous data obtained here will be useful for the practial development of such electro-mechanical filters
メタン・アンモニア法による青酸合成研究 VI 酸化亜鉛を添加せるアルミナ系触媒について
Get PDF論文(Article)1. The activity of alumina-zinc oxide catalysts in a hydrogen cyanide synthesis was investigated. The binary catalysts possessed higher activity than pure alumina catalyst. 2. From the above results it was assumed that there occurred such a progressive change during the operation as a reduction of zinc oxide to a metallic state by methane and a subsequent volatilization of the resulting zinc metal due to high temperatures. Consequently the catalyst might become more porous and extend its surface area. Actually, the extension of surface area of the catalysts used in this synthesis was demonstrated by gas adsorption experiments. 3. The contamination of the alumina-zinc oxide catalyst with a small amount of iron caused the decomposition of ammonia in a raw gas mixture and the lowering of activity to a greater extent than in the case of the pure alumina catalyst. This phenomenon may be explained by the assumption that the destructive action of iron activated through the extension of its exposed surface predominates over the proper catalytic action of alumina activated through the same process, leading to inactivation of the binary catalyst