著者は先に本會の會誌に、周邊が自由に支へられたる矩形板が弾性梁に乘る場合の近似的解法に就て發表し、又其後此種の一二の問題に就て講演した事が有る。本論文は之等の解法を今少し延長して多少一般的に取扱つたもので、其計算及實驗例として周邊が固定された場合をとつた。本計算は可成複雜にはなるが、其結果は實驗結果と良く一致する事を確めた。

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当院微生物検査室において, 1992年1月から1993年6月までの18か月間に分離した緑膿菌に対し血清型別を実施し, 材料, 診療科について血清型別の分離頻度を検討した。さらに, 分離頻度の高かった血清型の緑膿菌100株について, piperacillin (PIPC), cefsulodin (CFS), ceftazidime (CAZ), cefoperazone (CPZ), cefclidin (CFCL), aztreonam (AZT), carumonam (CRMN), imipenem (IPM), tobramycin (TOB), amikacin (AMK), gentamicin (GM), minocycline (MINO), onoxacin (OFLX), cipronoxacin (CPFX), fosfomycin (FOM) の15剤について微量液体希釈法より薬剤感受性測定を実施し, これらのMIC値を, MIC₈₀, 材料別, 診療科別, および血清型別に比較検討した。
1. 血清型別分離頻度はG型, E型, B型, I型, A型, 型別不能株, M型, F型, H型, D型, C型, K型の順に高かった。材料別においては, 入院患者では喀痰・咽頭材料から, 外来患者では膿・分泌物・創部材料からの分離頻度が高く, また診療科別においては, 入院では腹腔外科病棟から, 外来では耳鼻咽喉科からの分離頻度が高かった。
2. 全100株のMIC₈₀は, CPFX>CFCL, IPM, TOB>GM, OFLX, CAZ>CFS>CRMN, MINO, AZT, PIPC, AMK>CPZ>FOMの順に優れていた。CPFXのMIC₈₀値は2μg/ml, CFCL, IPM, TOBのMIC₈₀値は4μg/mlと低値を示した。
3. NCCLSの判定基準による各薬剤の感受性率は, CFCLで97.0%, IPMで91.0%, TOBで90.0%が感受性を示し, 以下PIPC, CAZ, CPFX, GM, AMK, CPZ, CRMN, AZT, OFLX, CFS, MINO, FOMの順に優れた結果が得られた。

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Sexually-transmitted amebiasis due to transmission of Entamoeba histolytica cyst by oral-anal sexual contact of homosexual men seems to be primarily responsible for the recent increment in prevalence of amebic infection in the western countries and Japan. Numerous epidemiological studies clarified some unusual aspects of this novel sexually-transmitted disease (STD). The most striking feature was the fact that virtually all of the E. histolytica isolates from homosexual men in the western countries were judged to be non-pathogenic by clinical findings, serologic investigations and zymodeme analyses. Accordingly, the homosexual men with amebic infection in these countries were essentially asymptomatic cyst carriers. However, in Japan, a number of homosexual men have been found from the cases with invasive amebiasis. This led us to investigate the pathogenicity of E. histolytica strains circulating among Japanese including homosexual men. First, we found a high correlation between positive syphilis serology with invasive amebiasis. Subsequent studies indicated that the seropositivity of Japanese homosexual men for amebic infection was much higher than that of heterosexual males and female prostitutes, and that the ameba isolates from homosexual men had zymodeme II, XIV and XIX, all of which stood for pathogenic E. histolytica. These findings strongly suggest that pathogenic strains of E. histolytica are spread among male homosexual communities in Japan. Because pathogenicity of this protozoon appears to be the most important factor for development of symptomatic, invasive amebiasis, these data seem to be reasonable enough to explain why in Japan we have had a number of cases with invasive sexually-transmitted amebiasis. Zymodeme XIV was also frequently detectable from the cases without the history of homosexuality, which leads us to envision that the unique epidemiological aspects of amebic infection in Japan may be relevant with Indian Subcontinent, virtually the only region where this zymodeme has been frequently found.

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This paper addresses a position estimation problem for communication packet loss of a swarm of autonomous mobile robots. To complete assigned geometric patterns, these robots move while communicating each other. As is often the case in wireless communication, the robots cannot receive other robots' position data reliably. For the end, the robots need to overcome the packet-loss problem and the missed position data in near real-time. As the use of several generalized filer approaches (e.g., extended Kalman filter and particle filter) is considered, it would be difficult to be applied to low-cost robot swarms with limited computational capabilities and resources. Formally, as our solution to this problem, positional extrapolation schemes with reduced computational cost yet high estimation accuracy. By using the proposed scheme, our scheme enables the robot swarms to improve the accurate coverage performance despite less computation burdens. Other features include decentralization, convergence, and stabilization, which are proved mathematically and verified through extensive simulations. Our analysis and simulation results show that the scheme is a simple and efficient approach to the deployment of mobile robots.

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In the processing of thermoplastic polymers, materials are to be deformed in the very state of melts. From this point of view, thorough studies on polymer melts are necessary to understand the flow phenomena of melts in the practical processing. We have been investigating the capillary flow phenomena of polymer melts by means of a kind of rheometer which is a screw extruder modified to measure the relation between pressure and flow rate in wide range.
Each polymer has its distinctive features in the flow phenomena differing from those in other polymers, such as flow properties, entrance pressure loss or end effects correction factor, melt fracture and Barus effect. For instance, the flow property of high-density polyethylene is not in a single curve but in two seperated curves, one corresponding to the lower shear rate region with smooth extrudates, and the other corresponding to the higher shear rate region with melt fracture.
In Fig. 1 is shown the typical relation between the pressure and the flow rate obtained in the case of various length nozzles with the same diameter. With increasing pressure in the experiment, a little wavy roughness is recognized on the surface of extrudates from S point on figure. Further increase of pressure causes a sudden jump of flow rate, and at the same point (F point in Fig. 1) melt fracture is recognized and some decrease of pressure follows this discontinuity. Consequently, two values of flow rate exist under the same pressure in the transient region.
Figs. 2, 3, 4 show the flow properties of high-density polyethylene which are independent of nozzle dimensions below F point but dependent on nozzle diameter above F point.
If we presume that the jump of flow rate of high-density polyethylene is caused by slippage at capillary wall, the equation (4) gives successfully the slippage velocity at wall which is independent of nozzle diameter and the function of only shear stress at wall as shown in Fig. 7 and equation (10).
Not so many reports on the flow properties of high-density polyethylene have yet been published, but they will be important along the development of the resin. And there remain now many unsolved problems in the field of the flow phenomena of polymer melts for investigation.

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Simple power analysis (SPA) can be employed in examining the power consumption trace of elliptic curve scalar multiplication to retrieve the computational sequence. However, SPA cannot distinguish point addition from point subtraction. The attacker still requires an exhaustive search to recover the private key when it is recoded in NAF or recoded by the 2-bit sliding window method. The average Hamming weight of an n-bit NAF recoded scalar is n/3, and an exhaustive search among the 2^n/3 candidates is required. This paper shows that in a left-to-right NAF recoded or a left-to-right 2-bit sliding window manipulated scalar the relative position of nonzero bits will reveal their values. Our analysis skill reduces the number of candidates of the scalar from the naive search of 2^n/3 to 2^2n/9 and 2^0.19n respectively for the cases of NAF and sliding window method.

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Magnetic resonance imaging (MRI) has played a central role in the diagnosis and management of multiple sclerosis (MS), a prototypic inflammatory demyelinating disorder of the central nervous system. We compared the results of neuro-otologic examination with those of MRI in 9 patients with MS admitted to the Neurology Ward of Shimane University Hospital. Five patients were male and four were female. Patient ages at onset ranged from 13 to 57 years old, (mean, 38.6 years). Patients had sufferd from MS for 2 to 31 years (mean, 11 years). Primary symptoms were numbness, diplopia, anarthria, or weakness. All patients had brain and spinal cord lesions on MRI. Five patients showed abnormal findings on neuro-otologic examination. Medial longitudinal fasciculus (MLF) syndrome is one of the most frequent disorders of the brainstem in MS, and was present in 3 patients. Of these 3, we present 2 patients in whom the findings of neuro-otologic examination were compared with MRI findings at the time of review. In patient 1, a 37-year-old man, MRI findings correlated with those of the neuro-otologic examination, amelioration was verified in the results of both examinations upon improvement of the pathology. In patient 2, a 35-year-old man, MRI showed a lesion in the medulla spinalis, but did not indicate a lesion in the brainstem. However, this patient had MLF syndrome on neuro-otologic examination, which was consistent with the symptoms. In this instance, neuro-otologic examination, which was consistent with the symptoms appeared to be more sensitive than MRI. MRI is an invaluable diagnostic tool but it cannot identify all lesions in MS. We emphasize that, in addition to MRI, neuro-otologic examination is useful in the diagnosis or evaluation of MS.

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放射という物理現象の基本である「空洞放射」の概念を理解する上での, ひとつの考え方を提案する. 従来におけるアプローチとは逆に, 「放射率εおよび吸収率αの定義」および「ε＝α」の2つを仮定とし, 結論として 「空洞放射の一意性」を導く証明方法を見出した. 当該証明には「射度」の概念を用い, 空洞放射の一意性は, 熱平衡状態における閉空間内各壁面上の「射度一意性」という形で表現される. 上記「仮定」は結論とは独立に定義可能であり, 証明自体は熱力学第0法則を前提としなくても成立する. その事実より上記証明は, キルヒホッフの法則を導出する際の逆手順になっていると考える. 本考察は,（異なる材質からなる）多面より構成される閉空間における放射平衡状態を考察する上で有用であり, また広く適用されている射度法解析に基礎的な妥当性を与える点でも重要である.

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This paper deals with load frequency control problem of power system. In recent years, due to the large introduction of generators using renewable energy, the relative load fluctuation increases, making it difficult to maintain power balance. Therefore, this paper proposes frequency control method using Moving Horizon Estimation and iterative gradient method for connected power system. In this paper, since system handles frequency control problems in real time, the system manager needs to grasp all states of power system every moment, and estimates the state of power system by using Moving Horizon Estimation. Next, control inputs are determined such that each area minimizes evaluation function including barrier function considering constraint conditions for generator and battery by using iterative gradient method. At this time, since the control target is connencted power system, it is represented as a model including the state of adjacent area, so that each area shares information with each other and performs cooperative control between areas. Finally, simulation of load frequency control using Moving Horizon Estimation and iterative gradient method is carried out and the effectiveness is confirmed.

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In this paper, we study the asymptotic behavior of solutions of a non-autonomous delay differential system. It is shown that every solutions tends to zero provided a certain matrix derived from the coefficients and the delays of the system is a M-matrix.

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In a transmission system, the conventional adaptive blind equalizers are implemented a direct estimation for the parameters of the equalizers. But both convergence rate of these algorithms and reliability of the regenerated signals degrade down.
In this paper, we propose a new equalization system and a new adaptive algorithm using the blind channel estimation for improving these two faults above. In the proposed method, first, we provide a psudo-channel and input signals to the psudo-channel in received part, and characteristics of the channel are adaptivly estimated using simplified kurtosis, skewness of output signals of the channel and the psudo-channel. Secondly, we design the equalizer using an adaptive orthogonal projection algorithm for the estimated channel impulse response matrix.
We confirm that convergence rate of the proposed algorithm and reliability of the regenrated signals are better than those of the conventional adaptive blind algorithm by numerical example.

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　岩手県八幡平市の夜沼に生育するオモダカ属植物について，DNA の塩基配列に基づいて同定を試みた．また，形態や夜沼における分布範囲，生育環境について，2012 年と2015 年に調査を行った．更に，1990 年から1994 年にかけて福島県いわき市の屋外において栽培観察を行った．ITS 領域の塩基配列は，北海道，黒竜江省，内蒙古自治区，サハリン，その他ジーンバンクに登録されたカラフトグワイSagittaria natans Pall. の塩基配列と完全に一致した．栽培実験では狭長楕円形の浮葉と短い側裂片を有する浮葉が観察された．また，野外調査では走出枝とその先に新しく形成された塊茎を持つ個体が観察された．栽培実験，生育地調査ともに開花個体を確認できなかったが，遺伝的特徴，形態的特徴から，夜沼に生育するオモダカ属植物はカラフトグワイであると結論した．夜沼の個体群は日本において2 つ目の生存個体群となるとともに，種の分布の南東限にあたる．同集団の早急な保全策の検討が望まれる．

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