Pub Date : 1996-12-01DOI: 10.1016/B978-0-12-386870-1.50027-7
M. Sakamoto, Katsushi Inoue, A. Ito
{"title":"A Leaf-Size Hierarchy of Three-Dimensional Alternating Turing Machines","authors":"M. Sakamoto, Katsushi Inoue, A. Ito","doi":"10.1016/B978-0-12-386870-1.50027-7","DOIUrl":"https://doi.org/10.1016/B978-0-12-386870-1.50027-7","url":null,"abstract":"","PeriodicalId":341160,"journal":{"name":"Technology reports of the Yamaguchi University","volume":"547 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123244866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Saitou, Akira Norikoshi, Yoshio Tawa, T. Akamatsu
The purpose of this paper is to investigate the effect of a semi-circuler tripping wire on the aerodynamic character of a circuler cylinder. An experimental investigation on the fluid forces acting on a circuler cylinder with a semi-circuler tripping wire were carried out. It was found that there were the range of the bi-stable flows in which the short time-mean values of fluid force change intermittently, the mean values of drag and lift coefficient with setting angle of tripping wire from front stagnation point changed remarkably and the strongest correlation was observed between fluctuation of drag and lift.
{"title":"Fluid Forces Acting on a Circuler Cylinder with Single Semi-Circuler Cylindrical Tripping Wire","authors":"T. Saitou, Akira Norikoshi, Yoshio Tawa, T. Akamatsu","doi":"10.2208/PROHE.38.469","DOIUrl":"https://doi.org/10.2208/PROHE.38.469","url":null,"abstract":"The purpose of this paper is to investigate the effect of a semi-circuler tripping wire on the aerodynamic character of a circuler cylinder. An experimental investigation on the fluid forces acting on a circuler cylinder with a semi-circuler tripping wire were carried out. It was found that there were the range of the bi-stable flows in which the short time-mean values of fluid force change intermittently, the mean values of drag and lift coefficient with setting angle of tripping wire from front stagnation point changed remarkably and the strongest correlation was observed between fluctuation of drag and lift.","PeriodicalId":341160,"journal":{"name":"Technology reports of the Yamaguchi University","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121359488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Nishida, S. Shirakawa, Toshinao Harada, S. Fujisaki, S. Kajigaeshi
(Eight 9-substituted 9-(2′-bromomethylphenyl)fluorene derivatives) (1) were prepared. Their conformational equilibria (apightleftarrowssp) are discussed on the basis of kinetic data for internal rotation obtained by 1H NMR spectroscopy.
{"title":"Rotational Isomerism in Fluorene Derivatives XIV Conformational Equilibria of 9-Substituted 9-(2-Cyanomethylphenyl) fluorene Derivatives","authors":"A. Nishida, S. Shirakawa, Toshinao Harada, S. Fujisaki, S. Kajigaeshi","doi":"10.1246/BCSJ.62.2093","DOIUrl":"https://doi.org/10.1246/BCSJ.62.2093","url":null,"abstract":"(Eight 9-substituted 9-(2′-bromomethylphenyl)fluorene derivatives) (1) were prepared. Their conformational equilibria (apightleftarrowssp) are discussed on the basis of kinetic data for internal rotation obtained by 1H NMR spectroscopy.","PeriodicalId":341160,"journal":{"name":"Technology reports of the Yamaguchi University","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130309765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1987-12-01DOI: 10.2493/JJSPE1933.42.539
R. Kitagawa
Carbide tools for machining rolls are apt to be fractured at the cutting edge. Therefore, the carbide grades of WC-Co having low contents of TiC, TaC, Co, low transversal rupture strength and high hardness are generally used. Predominant cause of the tool wear when cutting of rolls of high hardness is considered to be falling off of carbide particles which slowed out of the tools by the hard particles exclosed to the bottom side of the chips and those to the surface machined. Therefore, the relation between the mean free path of Co-phase and grain size in microstructures of carbide tool and the tool wear is investigated, additionally including that with carbon steels and cement-mortar as materials cut. The following are found. The shorter the length of mean free path is the case of the predominant cause of wear that is the abrasion type as in the machining of rolls, and the larger the mean grain size is in the case of that of the attrition type as in the machining of carbon steel, the longer tool life is obtained respectively. And the adaptability of carbide tools for the machining of rolls can be examined simply by the machining of cement-mortar.
{"title":"On the Wear of Carbide Tools in Machining Cast Iron Roll : The Relation between Microstructure and Tool Wear","authors":"R. Kitagawa","doi":"10.2493/JJSPE1933.42.539","DOIUrl":"https://doi.org/10.2493/JJSPE1933.42.539","url":null,"abstract":"Carbide tools for machining rolls are apt to be fractured at the cutting edge. Therefore, the carbide grades of WC-Co having low contents of TiC, TaC, Co, low transversal rupture strength and high hardness are generally used. Predominant cause of the tool wear when cutting of rolls of high hardness is considered to be falling off of carbide particles which slowed out of the tools by the hard particles exclosed to the bottom side of the chips and those to the surface machined. Therefore, the relation between the mean free path of Co-phase and grain size in microstructures of carbide tool and the tool wear is investigated, additionally including that with carbon steels and cement-mortar as materials cut. The following are found. The shorter the length of mean free path is the case of the predominant cause of wear that is the abrasion type as in the machining of rolls, and the larger the mean grain size is in the case of that of the attrition type as in the machining of carbon steel, the longer tool life is obtained respectively. And the adaptability of carbide tools for the machining of rolls can be examined simply by the machining of cement-mortar.","PeriodicalId":341160,"journal":{"name":"Technology reports of the Yamaguchi University","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131051978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1983-12-01DOI: 10.1016/0148-9062(90)90325-v
N. Miura
{"title":"Point Resistance of Piles in Sand","authors":"N. Miura","doi":"10.1016/0148-9062(90)90325-v","DOIUrl":"https://doi.org/10.1016/0148-9062(90)90325-v","url":null,"abstract":"","PeriodicalId":341160,"journal":{"name":"Technology reports of the Yamaguchi University","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127550224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It is the object of the present study to clarify the relations in respect of behaviors between the hydrogen detected by the X-ray line profiles in high tension steels, in the class of 80kg/mm2 charged by cathodic hydrogen, and the hydrogen in the steel immersed in hydrogen sulfide solution.As the result of the two tests the following facts have been made clear.(1) In the test made by charging annealed material with cathodic hydrogen, the crystals were deformed plastically, and the lattice of the crystals expanded. In the case of quenched and tempered material, and in the case also of the so-called“received”material, the behaviors of hydrogen detected by the X-ray line profiles are mostly static.(2) In the test made of annealed material in hydrogen sulfide solution, (immersed in the solution non-stressed or restricted by bending stress), there were little change in the X-ray line profiles though the test was continued until crackings by the stress corrosion began to be observed. This was also the case with the so-called“received”material.The following conclusion can be made from the two tests mentioned above: that the hydrogen in the test (1) behaves differently from that in the test (2), and so it is considered that hydrogen is not allowed to invade the lattice of the crystals through hydrogen sulfide solution.
{"title":"An X-ray Study on the Relation Between Hydrogen Embrittlement and Sulphonic Stress Corrosion in High Tension Steel","authors":"K. Kamachi, N. Tani","doi":"10.2472/JSMS.20.1314","DOIUrl":"https://doi.org/10.2472/JSMS.20.1314","url":null,"abstract":"It is the object of the present study to clarify the relations in respect of behaviors between the hydrogen detected by the X-ray line profiles in high tension steels, in the class of 80kg/mm2 charged by cathodic hydrogen, and the hydrogen in the steel immersed in hydrogen sulfide solution.As the result of the two tests the following facts have been made clear.(1) In the test made by charging annealed material with cathodic hydrogen, the crystals were deformed plastically, and the lattice of the crystals expanded. In the case of quenched and tempered material, and in the case also of the so-called“received”material, the behaviors of hydrogen detected by the X-ray line profiles are mostly static.(2) In the test made of annealed material in hydrogen sulfide solution, (immersed in the solution non-stressed or restricted by bending stress), there were little change in the X-ray line profiles though the test was continued until crackings by the stress corrosion began to be observed. This was also the case with the so-called“received”material.The following conclusion can be made from the two tests mentioned above: that the hydrogen in the test (1) behaves differently from that in the test (2), and so it is considered that hydrogen is not allowed to invade the lattice of the crystals through hydrogen sulfide solution.","PeriodicalId":341160,"journal":{"name":"Technology reports of the Yamaguchi University","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128462913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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