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稲麦の根の緩衝作用に関する研究 : 〔第1報〕根の部位による差異

土井彌太郎, 孫工彌寿雄

日本作物学会紀事
1953年 22 巻 1-2 号 5-6
発行日: 1953/12/25
公開日: 2008/02/14

DOI https://doi.org/10.1626/jcs.22.5

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1. The adjacent segments of excised roots were separately submerged in acid wellwater (e. g. pH 3.0, 3.4, or 4.0) for 20 hours. The pH of the wellwater was measured by the chinhydron electrode method at the beginning and end of every experiment. 2. At the end of every experiment the pH value usually reverted in the nutral (pH 7) direction by the buffer action of roots. 3. The buffer action was highest in the apical segment of the root and decreased in those more remote. 4. The buffer action differed with the species or varieties of the plants.
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機械的品質係数の高いネオジム置換された (Sr_0.2Ca_0.8)Bi₂Ta₂O₉系圧電セラミックス

菅谷豊, 岸善勝, 古池洋一, 荘司和男, 坂田好一郎

Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)
2002年 110 巻 1287 号 1032-1034
発行日: 2002/11/01
公開日: 2010/08/06

DOI https://doi.org/10.2109/jcersj.110.1032

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The piezoelectric characteristics of (Sr_0.2Ca_0.8)_1-xNd_2x/3Bi₂Ta₂O₉+y mass%MnCO₃ ceramics were examined. The samples were prepared by conventional sintering technique at 1190°C to 1250°C for 2h. The Curie temperature of samples gradually decreased from 631°C to 550°C when x increased. In the sample with (x, y)=(0.2, 0.2), the maximum value of mechanical quality factor Q_m was obtained, approximately 27000, and phase curve showed no spurious in thickness extensional vibration mode (t-mode).
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磁気軸受に適用されるトラッキングフィルタの工学的解釈に基づくローパスフィルタの遮断周波数の一調整法

齋藤大史, 涌井伸二

精密工学会誌
2019年 85 巻 3 号 282-289
発行日: 2019/03/05
公開日: 2019/03/05

DOI https://doi.org/10.2493/jjspe.85.282

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Unbalanced vibration compensation using a tracking filter is applied to Active Magnetic Bearing (AMB). This filter extracts only unbalanced vibration from the input signal. Peak-of-Gain Control (PGC), Auto-Balancing System (ABS), and Phase-Variable Control have been reported as compensation methods using this tracking filter. Furthermore, in the previous study, we proposed a compensation method using uniaxial tracking filter that suppresses unbalanced vibration in the axial direction. However, the compensation method using the tracking filter has a specific value for the cut-off frequency of the low-pass filter (LPF) incorporated in the filter, but there is no technical background of the value. In addition, the uniaxial tracking filter is derived by tracing the signal path of the conventional tracking filter. Therefore, there is no theoretical background that the uniaxial tracking filter extracts only unbalanced vibration. In this paper, first, the tracking filter applied to the radial direction is interpreted by using both the fixed coordinate system and the rotary coordinate system. Based on this interpretation, a method for adjusting the cut-off frequency of LPF is proposed. Next, through interpreting by communication theory, it is clarified that the uniaxial tracking filter extracts only unbalanced vibrations. Furthermore, a method for adjusting the cut-off frequency of the LPF in the filter based on this interpretation is proposed.

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2011年東北地方太平洋沖地震における生産施設の事業継続の現状と地震被害（その1）

北林昂祐, 藤原孝, 山岸邦彰

日本建築学会技術報告集
2013年 19 巻 41 号 363-366
発行日: 2013/02/20
公開日: 2013/02/20

DOI https://doi.org/10.3130/aijt.19.363

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Questionnaire survey for staffs whose production facilities were affected by the 2011 off the Pacific coast of Tohoku Earthquake was carried to obtain basic data which are essential for promoting business continuity, actual state of business continuity and earthquake damages were clarified through the survey. Part I shows the actual state of business continuity. The following results of the survey were revealed. Although the number of offices which know business continuity is high, the number of offices which has a business continuity plan is low. The number of offices that set RTO and, start their business within RTO is low.
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稻根に對するアンモニア鹽の作用に關する研究 : (第1報) 根の生長並に原形質流動

土井彌太〓, 菅谷豊司, 越水幸男, 村上信一

日本作物学会紀事
1950年 19 巻 1-2 号 194-197
発行日: 1950/08/30
公開日: 2008/02/14

DOI https://doi.org/10.1626/jcs.19.194

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1. The growth of roots of rice seedlings are inhibited as the concentration of (NH₄)₂SO₄ in wellwater increases. The inhibiting effect of (NH₄)₂SO₄ is less in the "Shinriki" variety (high yield and susceptible to rice blast) as compared to the "Kameji" variety (low yield and insusceptible to rice blast) in wellwater as well as in nutrient solution with the pH controlled at 5.5 or 7.0. 2. High concentration of (NH₄)₂SO₄ which inhibits the growth of roots also inhibits the protoplasmic streaming in root hairs. The rate of streaming increases somewhat in adequately diluted solution (0.001 mol) of (NH₄)₂SO₄ which was also found to be the optimum concentration for top growth. 3. When pH values of wellwater are distinctly low, the growth of roots and protoplasmic streaming are inhibited with the effects being less in the "Shinriki" variety as compared to the "Kameji" variety.
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稻根に對するアンモニア鹽の作用に關する研究 : 第2報根の屈化性

土井彌太郎

日本作物学会紀事
1951年 19 巻 3-4 号 247-250
発行日: 1951/03/30
公開日: 2008/02/14

DOI https://doi.org/10.1626/jcs.19.247

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1. Chemotropism of seedling roots of rice was observed in agar. 2. For ammonium ion, roots of paddy rice and upland rice showed chemotropism, but none for nitrate and several other ions. 3. Ammonium and nitrate ions diffused in agar with respective concentration gradients.
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水稲における根群の形態形成について, とくに窒素施用量を変更した場合の一例

川田信一郎, 丸山幸夫, 副島増夫

日本作物学会紀事
1977年 46 巻 2 号 193-198
発行日: 1977/06/30
公開日: 2008/02/14

DOI https://doi.org/10.1626/jcs.46.193

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The present study is an attempt to clarify the relation between the root system formation of rice plants and levels of nitrogen supply in paddy fields. The test material, the rice cultivar 'Mubo-Aikoku', was grown under different levels of nitrogen supply: N-nonsupply, N-8 kg level, N-16 kg level, and N-24 kg level; all levels are expressed in kilograms per ten ares. The results of observation on the root system in the longitudinal plane of the paddy were as follows: The soil depths of crown root distribution at N-nonsupply and N-8 kg level were 60 cm and 50 cm, and the depths at N-16 kg level and N-24 kg level were 40 cm and 35 cm. The fresh and dry weight of the roots grown at N-nonsupply was lighter than the others, and the weight of the roots grown at N-16 kg level was heavier than the others. The above facts seem to suggest that the shape of the root system is larger in depth and width in paddy fields with a low level of nitrogen supply and is smaller in one with a high level of nitrogen supply.
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タービンの翼軸連成曲げ振動解析向け等価質点モデル化

岡部明, 工藤健, 塩幡宏規, 松下修己, 藤原浩幸, 依田秀夫, 桜井茂雄

日本機械学会論文集Ｃ編
2011年 77 巻 775 号 742-754
発行日: 2011年
公開日: 2011/03/25

DOI https://doi.org/10.1299/kikaic.77.742

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In a traditional turbine-generator set, rotor shaft designers and blade designers have their own models and design process which neglects the coupled effect. Since longer blade systems have recently been employed for advanced turbine sets to get higher output and efficiency, additional consideration is required concerning rotor bending vibrations coupled with a one-nodal (k=1) blade system. Rotor-blade coupled bending conditions generally include two types so that the parallel and tilting modes of the shaft vibrations are respectively coupled with in-plane and out-of-plane modes of blade vibrations with a one-nodal diameter (k=1). In this paper, we propose a method to calculate the natural frequency of a shaft blade coupled system. According to our modeling technique, a certain blade mode is reduced to a single mass system, which is connected to the displacement and angle motions of the shaft. The former motion is modeled by the m-k system to be equivalent to the blade on the rotating coordinate. The latter motion is commonly modeled in discrete form using the beam FEM on an inertia coordinate. Eigenvalues of the hybrid system covering both coordinates provide the natural frequency of the coupled system. In order to solve the eigenfrequencies of the coupled system, we use a tracking solver based on sliding mode control. An eight-blade system attached to a cantilever bar is used for an example to calculate a coupled vibration with a one-nodal diameter between the blade and shaft.
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タービンロータの軸曲げと翼アンブレラモードの連成振動の実験的研究

工藤健, 塩幡宏規, 松下修己, 藤原浩幸, 桜井茂雄, 依田秀夫

日本機械学会論文集
2014年 80 巻 812 号 TRANS0077
発行日: 2014年
公開日: 2014/04/25

DOI https://doi.org/10.1299/transjsme.2014trans0077

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This paper describes an experimental study on the characteristics of blade-shaft coupled bending vibration of a rotor system with a bladed disk. In a rotor with relatively long blades such as low-pressure steam turbines, the coupled vibration of shaft torsional and blade bending vibration with nodal diameter of zero (umbrella mode) must be considered in terms of reliability. The bending-torsion coupled resonance of rotor systems occurs under specific conditions, when the rotational speed is equal to the sum and/or difference of the bending natural frequency and torsional natural frequency. In this study, a test apparatus with a flexible rotor equipped with a bladed disk which simulates actual turbine blade structure was developed to study the coupled vibration characteristics of shaft bending and blade (κ=0). The rotor was excited with an active magnetic bearing for lateral direction and a servomotor for torsional direction. Resonance of a bladed disk with nodal diameter (κ) of zero, which was coupled with the rotor’s torsional vibration, occurred under the above specific condition with lateral excitation force where frequency was equal to the rotor’s bending natural frequency. In addition, resonance of rotor bending vibration was found when the rotor was excited in torsional direction of its natural frequency.
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等価縮小モデルを用いた達成振動の解析法

松下修已, 菅谷豊美, 名村清, 岡部明, 金子了市, 道村晴一, 井田道秋

日本機械学会論文集 C編
1988年 54 巻 499 号 587-595
発行日: 1988/03/25
公開日: 2008/02/21

DOI https://doi.org/10.1299/kikaic.54.587

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Coupled vibration problems in large scale mechanical or rotor systems are often encountered; for instance, a shaft-blade coupled vibration of a turbine and generator set. Instead of FEM modelling for a global system consisting of main system A and sub system B, an equivalent reduced system is presented. According to the reduction technique, the eigenvalue problem of the vibrating system B is first solved; then, equivalent masses and springs are determined for each corresponding eigenmode of system B. Therefore, the original global system is reduced to system A plus the additional masses representing system B. It is concluded that the reduced model is physically reasonable and numerically accurate enough, even though a simpler program is used for the system A than for the global system A+ B.
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有限要素解析の精度評価に関する基礎的研究 : 第1報,薄平板の面外曲げ解析の場合

横山正明, 菅谷豊明

日本機械学会論文集 A編
1986年 52 巻 476 号 853-861
発行日: 1986/04/25
公開日: 2008/02/21

DOI https://doi.org/10.1299/kikaia.52.853

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As a basic study for the establishment of an accuracy estimation method in the finite element method, this report deals with the problems of transverse bending of thin, flat plates. From numerical experiments for uniform mesh divisions, the following relation was deduced, ε∝(h/a)^k, k≥1, where ε is the error of the value by the finite element method relative to the exact value and h/a is the dimensionless mesh diameter. combining this relation with the results of the error analyses for local mesh refinement, an accuracy estimation method, which was based on the recursive simulation method, was presented. A computer program using this accuracy estimation method was developed and applied to nineteen problems of various shapes. The usefulness of this accuracy estimation method was illustrated by these application results.
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535 タービンの翼軸連成曲げ振動解析向け等価質点モデル化

工藤健, 岡部明, 塩幡宏規, 松下修己, 藤原浩幸, 依田秀夫, 桜井茂雄

Dynamics & Design Conference
2011年 2011 巻 535
発行日: 2011/09/05
公開日: 2017/06/19

DOI https://doi.org/10.1299/jsmedmc.2011._535-1_

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In a traditional turbine-generator set, rotor shaft designers and blade designers have their own models and design process which neglects the coupled effect. Since longer blade systems have recently been employed for advanced turbine sets to get higher output and efficiency, additional consideration is required concerning rotor bending vibration coupled with a one-nodal (k=1) blade system. Rotor-blade coupled bending conditions generally include two types so that the parallel and tilting modes of a shaft vibrations are respectively coupled with in-plane and out-of-plane modes of blade vibrations with a one-nodal diameter (k=1). In this paper, we proposed a method to calculate the natural frequency of a shaft blade coupled system. According to our modeling technique, a certain blade mode is reduced to a single mass system, which is connected to the displacement and angle motions of the shaft. The latter motion is commonly modeled in discrete from using the beam FEM on an inertia coordinate. Eigenvalues of the hybrid system covering both coordinate provide the natural frequency of the coupled system. In order to solve the eigenfrequencies of the coupled system, we use a tracking solver based on sliding mode control. An eight-blade system attached to a cantilever bar is used for an example to calculate a coupled vibration with a one-nodal diameter between the blade and shaft.
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断続切削における切れ刃欠損の解析的予測に関する研究(第7報)

断続切削回数による切れ刃欠損確率の変化

臼井英治, 井原透, 白樫高洋, 金沢憲一

精密機械
1984年 50 巻 5 号 866-874
発行日: 1984/05/05
公開日: 2009/06/30

DOI https://doi.org/10.2493/jjspe1933.50.866

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Transient variation of impact stress field within. cutting edge during the edge engagement in interrupted turning was first obtained through FEM calculation using measured variation of impact cutting force on rake face. The probabilistic stress criterion of brittle fracture and its variation due to impact deterioration, which were reported in the previous papers, were next obtained from impact fatigue and fracture tests of P 20 tungsten carbide. From the results, it is possible to obtain variation of the criterion with impact repetition for each finite element within the cutting edge by using the conversion rule reported in the previous paper. In collation of the most dangerous state of the transient stress with the fracture criterion at the each element, variation of fracture probability distribution within the cutting edge with number of the interruption is predicted. Several relations for small chipping occurrence and large failure occurrence are further predicted from this result. The predicted relation for large scale failure was verified to be in good agreement with experiment, while the relation for small edge chipping shows good agreement only in an incipient stage of the interrupted cutting. Formation of cutting edge roundness due to accumulation of the small chippings appears to alter the stress state in a vicinity of the cutting edge. It is found that fracture probability is largely reduced by applying a suitable flank force to the edge, and then the prediction of medium size chipping with neglecting minute ones becomes possible.
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Epstein-Barr ウイルスの増殖機構: ウイルスゲノム複製を中心として

鶴見達也

ウイルス
2002年 52 巻 1 号 191-201
発行日: 2002/06/01
公開日: 2010/03/12

DOI https://doi.org/10.2222/jsv.52.191

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Epstein-Barr virus (EBV) は伝染性単核球症の原因ウイルスとして知られているが, バーキットリンパ腫, 上咽頭がん, T細胞白血病, 胃がん, 乳がん等との関連が指摘されているヒトがんウイルスである. バーキットリンパ腫の樹立細胞からEBVゲノムが脱落すると腫瘍原性がなくなり再びEBVが感染しEBVゲノムが導入されるとその細胞は腫瘍原性を獲得することから, 細胞にEBウイルスゲノムが複製保持されることが腫瘍原性に密接に関連していることが示唆される. 従ってウイルスゲノム複製及び保持機構の解明はEBV感染がん細胞の制御を考える上で重要な研究領域である.
DNAウイルスであるEBVは宿主細胞の核をゲノム複製の場とするが, 潜伏感染状態とウイルス産生状態でウイルスゲノム複製機構が異なる. 潜伏感染状態ではウイルスゲノムはヒストン蛋白質と結合したヌクレオゾームとして存在し染色体DNAと同じようにS期に同調して1回複製される. このゲノム複製は細胞周期に依存した複製様式から染色体複製開始の制御に関わる宿主蛋白質がEBVゲノムと相互作用をしていることが最近相次いで報告された. 一方, ウイルス産生状態においては潜伏感染時とは異なる複製開始領域oriLytから複製が開始し少なくとも複製後期においてはローリングサークル型複製様式によりウイルスゲノムは複製される. ローリングサークル型複製フォークで働くDNA合成装置は6種のウイルス由来複製蛋白質群 (DNAポリメラーゼ複合体, 一本鎖DNA結合蛋白質, ヘリカーゼ/プライマーゼ複合体) から構成される.
本稿では (1) 潜伏感染時のEBVゲノム複製に関与することが明らかとなったOrc, CDC6, MCM complex の細胞内動態についてのぞく (2) EBV複製フォークで働くウイルス複製蛋白質の機能, 蛋白質間相互作用について我々がこれまでに得た知見を紹介し, EBV複製フォークのモデルを提示すること, また対照となるバクテリオファージなどの原核生物, 真核生物複製系と比較検討する.
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講演要旨

日本植物病理学会報
1950年 14 巻 3-4 号 93-102
発行日: 1950/09/30
公開日: 2009/04/03

DOI https://doi.org/10.3186/jjphytopath.14.93

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初生女子相続の一考察

相続と労働力(一)農村の部I 茨城県特に新治郡について

小林三衛

法社会学
1956年 1955 巻 6 号 145-166
発行日: 1956/03/30
公開日: 2009/04/03

DOI https://doi.org/10.11387/jsl1951.1955.145

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作物の根に関する研究

田中典幸

日本作物学会紀事
1974年 43 巻 2 号 291-316
発行日: 1974年
公開日: 2008/02/14

DOI https://doi.org/10.1626/jcs.43.291

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昭和25年度春季大會

日本植物病理学会報
1951年 15 巻 2 号 82-108
発行日: 1951/04/20
公開日: 2009/02/19

DOI https://doi.org/10.3186/jjphytopath.15.82

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