"Paico, " Chenopodium ambrosioides L., is a traditional Peruvian medicine which is considered to be nervine, antirheumatic, anthelmintic, etc. An attempt was made to isolate the component having sedative and/or analgesic properties from "Paico" and "Aritasou" (the Japanese name for C. ambrosioides). Ascaridole was identified as the active principle in both materials.

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MR head is a device sensitive to temperature. The signal distortion related to mechanical contact between head and media is a special phenomenon to MR head. In this paper, a method which modifies the transfer function of data channel was investigated to eliminate the effect of thermal asperity of MR head in tape drive. The result shows that this method becomes a important, economic and effective way in addition to improving the MR head design.

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  As one of the methods for ultra high density recording of hard disk drives, Thermally Assist Magnetic Recording (TAMR) increases memory density and thus attracts attention. The key technology of the TAMR is applying laser light as well as plasmon antenna to generate localized near-field spot. We fabricated plasmon antennas on magnetic film to understand fundamental recording capability by confined near-field stimulated by ultra short laser pulse. Some square plasmon gold antennas were deposited over a magnetic recording film (Co₅₅Pt₃₀Cr₁₅-SiO₂). We successfully confirmed that small magnetic domains of 67 nm × 62 nm were written at the corner of the plasmon antennas by the surface plasmon effect with a femto-second laser pulse.

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As the recording track density increases in hard disk drives, the ball bearing in the actuator pivot would only rotate a few micro-degrees during track following and short seeks. In this paper, the behavior of the friction torque of the ball bearing under micro motion was studied. The investigation showed that the change in the direction of the rotation did not result in a reversal of the friction torque and hence, not forming the torque hysteresis loop when the ball bearing oscillation was less than a certain value. The friction torque was observed to keep to that value rather than dropping back to zero, though the direction of rotation of ball bearing changes frequently during track following. This impacts the servo controller design.

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A seafloor instrument has been constructed to measure a horizontal component of the electric field, using a long antenna (up to 1000m) to increase sensitivity. The instrument has a depth capability of 5200m and may be deployed for several months at a time, collecting over 14 Mbytes of data under the control of a microprocessor. Instrumental noise is mainly caused by the Ag-AgCl electrodes used to make contact with the sea water, and is about 10-²⁴V²/m²Hz at frequencies above 1Hz, following an f^-2 power law at frequencies (f) below 1Hz. For controlled source signals averaging techniques such as synchronous stacking and block averaging have been used to detect narrow band (5.6×10^-4Hz) signals as small as 10^-12V/m. The instrument is designed to include the pressure transducer described by COX et al. (1984) and has already been used for the study of ocean bottom seismic signals, magnetotelluric experiments and controlled source electromagnetic soundings.

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We report on a method used to characterize disk drive chemical outgassing and results on chemical outgassing dynamics. Chemical outgassing results indicate that the drive outgassing rate increases with drive temperature and the rate is exponentially dependent upon temperature (Arrenhius activation energy : 15 kcal/mole). The outgassing rate of a functional disk drive decreases, in a dual exponential fashion, with drive operation time and is discussed in terms of outgassing and offgassing phenomena. The applied value of determining outgassing properties of operational disk drives is it provides a means to correlate chemical characteristics with disk drive performance.

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Recently, life cycle assessment (LCA) has been attracted attention in the manufacturing fields. Although some consumption devices have been designed taking LCA into consideration, to date there have been few reports on machine tools that do so. In this study, a desktop-size multifunctional machine tool is assembled for use as a cell production system, and we use LCA to estimate the environmental impact. The LCA results demonstrate that the use of smaller machine tools is an effective way to lower the environmental impact in small-parts manufacturing fields.

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This paper studies generalized M/G/1 queues in which the first N customers of each busy period receive exceptional services. Applying the supplementary variable approach, we derive the recursion formulas to obtain the generating function of the stationary queue length distribution given that n customers have been served since the beginning of current busy period. Furthermore, we present a computationally tractable scheme which recursively determines the moments of the queue length distribution and the sojourn time distribution. Special cases are treated in detail. Numerical examples are also provided.

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Implant treatments have been applied clinically over 40 years since osseointegrated implant rehabilitation had been introduced in early 1960's. For these years, many research papers are reported in Europe, America and Asian countries on basic research and clinical application. Now, Implant treatments covered from single tooth missing to total edentulous and they are restored esthetically and functionally and naturally. In background, there are advancement of treatment techniques, improvement of implant system and higher level of Quality of Life of patients. Concretely, they are extension of implant indications and maintenance of circumference surrounding implant by hard and soft tissue management. On implant success, implant team approach consisting of dentist, dental hygienist, dental technician and patient's family for patients sharing of treatment goal are extremely important. Restoration driven is one of the treatement method decided by final restoration which are planned with patient's desire, local condition, general condition. Number of implants, implant size, implant position and necessity of hard tissue management are decided.
Nowadays, even though patients demand immediate loading by reason of shortening of treatment period, the treatment method do not recognized routinely except over denture for mandibulor total edentulous. For the success of implant success, patients conditions including local, general, psychological conditions, plaque control and patient's corporation for implant treatment are not only important but also treatment ability and technique of dental team.

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本研究の目的は、日常的な自然現象に関する子どもの理解の実態を解明することにある。そのために、メンタル・モデルの考え方を採用し、降雨現象を事例とした面接調査を実施している。被験者は2つの小学校から選ばれた1年生40名、3年生36名、5年生40名から構成された3集団、計116名であった。各被験者には、彼らの降雨現象に関する理解状態について一連の質問がなされた。面接時間は被験者一人につき20~25分程度であった。その全過程は録音され、後に詳細な言語記録が作成された。被験者から得られたプロトコールは、降雨現象に対するメンタル・モデルの構築を明示化するために分析された。その結果、少なくとも全被験者のうち81名は、明確なメンタル・モデルを構築していることが明らかとなった。さらに、降雨現象の理解においては、4種類のメンタル・モデルが構築されていることを見いだした。

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First of all in this paper, I show a brief history of a pulse detonation engine research. Thermodynamic analyses for detonation combustion were described, and it was shown that the thermal efficiency of the detonation combustion cycle is higher than the Brayton one. The typical pulse detonation engine operation and gasdynamics models for the simplified pulse detonation engine were illustrated. I also presented recent researches regarding heat and friction losses on a PDE tube wall. The partially-filling effect, ejector effect and nozzle effect on thrust argumentation for PDEs were introduced. As important technical issues of PDEs, I show a deflagration-to-detonation transition process control and gas supplying systems in PDEs. As recent applied researches for PDEs, an air-breathing PDE, a pulse detonation rocket engine, a pulse detonation turbine engine, a PDE thermal spray, and a micro PDE were reported. Finally a rotating detonation engine was introduced.

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パソコン上で機能する動物分類理解診断ソフトを開発した。この診断ソフトを用いて、中学生・高校生の動物分類の理解状況を調べたところ、次の事柄が明らかにされた。1. 生徒は、それぞれの動物の持つただ一つの顕著な属性によって、分類を行う傾向がある。2. 分類に用いられる属性は、高校生になると、日常的な属性が減り、生物学的な属性が増加する。3. しかし、個々の動物を弁別する際には、日常的な属性が高校生になっても用いられる傾向がある。4. 生徒の捉える動物概念は、生物学的に認められている動物概念よりもかなり限定されている。5. 分類体系全体における各分類群の位置づけは、十分に認識されていない。

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The purpose of this paper is to clarify the transition of technology, product strategy and inter-firm transaction in the phase of market growth for next-generation vehicle with interviewing automotive electric & electronic parts suppliers (Keihin and Denso) in Japan. Particularly, we focused on what the suppliers got interested in about that. In short, what were opportunity and threat for them?
There are 3 conclusions that we found out. The first thing is that both companies considered they would obtain a great chance for their business through the market growth for next-generation vehicle. Therefore they have to enhance their organizational capability immediately. Secondly, they recognize electric manufacturers and foreign gigantic suppliers as tough competitors. And finally, they're concerned about the automobile which has been being “commodity” recently, like household appliances. Thus, not only auto parts suppliers but also all players of auto industry must provide more attractive automobiles into the market to be desired from a lot of consumers.

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