著者

神代 雄一郎 松本 勝邦

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.10, pp.87-101, 1971

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The following is a report based on the actual survey conducted in 1970 at Sugajima, a fishing village located on a tiny island of the same name, about 2 kilometers north of Shima Peninsula. In spite of the fact that the island used to be under Ise's influence, the indigenous faith and customs have been preserved owing to its geographical location, that is to say, its insularity. The prominent feature of this village is that the almost all of the women in the community are Amas, woman divers, and the particularity of their occupation is reflected in the divine service called Shirongo-matsuri which is related with Shirahige Shrine and the buddhist service called Jinjin-bune. It is also worth noticing that the village has kept the population not over 1,000 and the number of houses less than 200 for along period. A community as Sugajima is the most ordinary case in the rural parts of Japan; it seems to be organized so well that neither the emergence of any single man of influence nor a threat of poverty is possible there. In case of Sugajima, the community is divided into ten effective groups and the delegates from each group keep the order of festival and operate the members' business through consulation. They also supervise the works of Amas in order that they may not indiscriminate fishing Awabi, ear-shell. If the port of the villege is well likened to the back of a hand, three roads go up gradually in the valley toward the hilltop, like three fingers, the houses being built on both sides of these roads. Each house is planned to have a court enclosed with a low stone hedge where fishers take care of their fishing implements, and these hedges stand in line on both sides of the road.

著者

町田 富夫 向殿 政男

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.31, pp.129-150, 1992

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N1 protocol is a computer communication protocol suite that is used in the inter-university computer network called N1 network in Japan. N1 network can not communicate with TCP/IP network. So, α gateway software which makes communication between N1 network and TCP/IP network is desired. This paper proposes a form of the gateway to make session layer communication between those networks and a method to construct the gateway using concurrent task control and Unix's inter-process communication utilities.

著者

高橋 真太郎 水沼 達夫

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.26, no.3, pp.p1-12, 1987

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This paper deals with analytical and experimental study on hydraulically-operated valve gears in the Diesel engine. The authors worked out a system to drive valve gears hydraulically instead of mechanically. The calculation of the valve lift was made through the Characteristic Method, and the results were compared with the results of experimental investigation. Both results approximately coincided with each other. They indicated that hydraulically-operated valve gears were applicable to the Diesel engine. Hydraulically-operated valve gears were improved and tested in a practical Diesel engine. As a results, the engine performance became more efficient by use of hydraulically-operated valve gears.

著者

松本 勝邦

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.36, pp.165-188, 1997

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In this papaer, discuss traditional boundary markers in Japan. They are not always physical barriers, but sometimes are symbolic. In other words, they tend to symbilize metaphysical segmentations of social space or social time in the minds of the people. Without understanding of their hidden meanings and realizing their invisible separations of categories, most of them may lose their effectiveness and significance as boundary markers. This could be a key towards understanding the fundamental structure of Japanese culture.

著者

銀林 浩

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

no.9, pp.251-260, 1971-01

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Generally, it is said that the operations form a group. But this holds only because we neglect the intermediary process of the operation. So we must consider the notion of the changes which include the intermediary process, and call it pseudo-operation. We consider the totality of such pseudo-operations and its algebraic structure. By a pseudo-group, we mean a set G where a law of composition (a, b) → ab and a equivalence relation a〜b are defined and satisfy the following axioms; (1) if a〜b, then ac〜bc and ca〜cb for all c∈G, (2) weak-associative law (ab)c〜a(bc), (3) exisitence of a unit element e such that ae=ea=a for all a∈G, (4) for any a there exists a inverse element a' such that aa'〜a'a〜e. We give several examples of different kinds of pseudo-groups. Then we determine the subsystems of such an algebraic structure and show that an important subsystem is saturated pseudo-subgroup with respect to the equivalence relation. We also determine the normal subsystem such that the quotient set has also the same structure. It is showed that the quotient set of pseudo-group G with respect to the equivalence relation is a group G^^- and that saturated, pseudo-subgroups of G correspond to subgroups, of G.

著者

植草 新一郎 近田 裕幸 那須 練三

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.31, no.10, pp.p151-173, 1992

被引用文献数

3

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Bioelectric potential on the leaf surface of a plant named schefflera abroricora have been measured to investigate the 1/f fluctuation. The potential is classified into two types; namely, one is changeful and the other is changeless. The maximum potential difference across the leaf is a few millivolt, and various random and periodic waveshapes are observed. Power spectrum of the plant is well approximated by a straight line in log mV versus log f plot. Therefore, the bioelectric potential of the plant seems to be fractal. But, the fractal dimension depends on each data. The 1/f fluctuation is also found for the correlation coefficent 0.81〜0.89, but it is not obtained for the coefficent above 0.90. Other interesting phenomena such as synchronization phenomenon and a firing response for the external electric stimulus are observed. Observed voltage waveshape is also changed depending on position of electrodes.

著者

荒井 祓彦 芝田 次男 永倉 充

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.24, pp."1-1"-"1-8", 1985

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The effect of the partial substitution of Co for Fe on magnetic properties of Nd-Fe-B alloys have been investigated by a powder metallugical method. The curie temperature in this system increase with the increase of Co content, while the loop squarness of demagnetization curves are deteriorated when the concentration of Co is more than 14 at%. E. P. M. A. data suggest that excessive Co in this system produces a new magnetic phase in the Nd rich region.

著者

駒宮 安男

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.28, pp.163-291, 1989

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There exist many programming languages each of which is based on a rational thinking system and therefore can be considered as a common international language. The purpose of this paper is to describe an artificial language, Talkable Programming Language (TPL), which was proposed by this author for use as both a spoken and written language in the scientific and technological field, as well as a programming language. Accordingly, TPL will be suitable for scientific and technological discussions in international conferences and will facilitate understanding of academic papers. At present, our research group is forging ahead in an effort to complete TPL as an alternative common langauge. It is well known that ambiguities of nuances are inherent in natural languages. As a result many difficulties will arise if a natural language is used in a man-machine conversation. Therefore, the grammatical rules which establish a system for orders and variable patterns of words and expressions in natural languages were studied for the design of TPL. There rules act as a framework of reference, but tend to be different, with varying complexity, among individual languages. As a language, TPL does not incorporate the complex grammatical restrictions of natural languages, but is designed with a totally new grammatical system aimed at the minimum use of limiting factors. When TPL is completed, machine translation from TPL to other natural languages will be made much easier. However, the opposite, machine translation from a natural language to TPL, will not be as easy due to the ambiguities of natural languages and semantics. As TPL will be an easy language to master, it will be possible to use TPL as a middle language between machine and natural languages.

著者

山崎 英三

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.3, pp.205-230, 1964

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Au 17 eme siecle Descartes s'est occupe de construire les lois de choc pour demontrer celles de propagation de la lumiere. Apres une centaine d'annees, Maupertuis a propose le principe de la moindre action, en pretendant que son principe peut deduire non seulement les lois de propagation de la lumiere, mais les lois de choc pour les corps elastiques et pour les corps durs (non-elastiques). L'un et l'autre ont recherche le premier principe de la nature. Descartes ayant vecu dans le temps ou la mecanique newtonienne etait a l'aube du jour, il a cru qu' il pourrait construire la science physique avec ses idees innees : l'extension et le mouvement. Aux jours de Maupertuis, Newton avait deja developpe sa mecanique. Cependant, plus la mecanique newtonienne s'est developpe, plus on a du reconnaitre que son applicabilite etait bien restreinte. La mecanique newtonienne etait trop impuissante pour expliquer toutes les phenomenes de la nature. On n'a pu se confier a l'extension ou au mouvement de Descartes. Aussi en mettant l'extension au meme rang que toutes les qualites sensibles, Maupertuis a-t-il etaye l'idealisme de Berkeley. Cependant, il est tres curieux que les pensees de Maupertuis laissent des fragments de metaphysique cartesienne. C'est peut-etre parce que Maupertuis, en croyant l'universalite de son principe de la moindre action, n'a pas cesse d'avoir la preference pour le systeme qu'on reprochait tant au 18 eme siecle.

著者

今野 礼二

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.13, pp."10-1"-"10-8", 1974

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Let M be a Riemannian manifold of the form (r_0, ∞)×S^<n-1>, S^<n-1> being the (n-1)-sphere. We suppose that the metric of M is given by ds^2=dr^2+ρ(r)^2ds'^2 and we consider on M the Schrodinger-type equation -Δu+qu=λu, λ>0. The aim of this paper is to find relations between growth of the solutions at ∞ and the functions ρ and q.

著者

岡 剛 石原 荘一

出版者

明治大学

雑誌

明治大学科学技術研究所紀要 (ISSN:03864944)

巻号頁・発行日

vol.7, pp.51-69, 1968

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The object of this research is to check up the relation of the following three items by experiments of the scavenging action, in a visible state, .of two stroke cycle engines. (A) The form of a cylinder-liner. (B) The flowing state of scavenging medium in the cylinder. (C) Efficiency with relation to scavenging performance. There have been carried out many investigations of the relation between (A) and (B) or (A) and (C), but no report has been found in the relation between (B) and (C). It is very difficult to investigate the relation between (B) and (C) of a scavenging action at the same time, but if working fluid is the liquid, the test becomes easy. Then several experiments were performed by the newly developed method in which the scavenging efficiency was made calculable by the observation of the change of the specific gravity of the water in the cylinder when the salt water mixed with ink was introduced there by the scavenging action. The experimental results were formulated with the scavenging characteristic curves with a consideration to the short circuiting loss and rate of diffusion, of scavenging medium. The third report contains two subjects, as shown in the titles. The first subject is the second report and also a report on the cross scavenging on two dimensional flow. The second subject is an experiment on three dimensional flow by a device using crank mechanism of an actual engine. In this experiment, it was found that there was much back flow from the exhaust ports into the cylinder at the inceptive stage of the scavenging action.