{"title":"A Harmonic Analysis of Saturation Recording in a Magnetic Medium","authors":"B. Kostyshyn","doi":"10.1109/TEC.1962.5219358","DOIUrl":"https://doi.org/10.1109/TEC.1962.5219358","url":null,"abstract":"A single write-read head coupled with saturation recording techniques is commonly used to store digital information. Because of the experimental difficulty in determining the contribution of individual parameters to the system, a theoretical equation describing the output of a system in terms of the physical, magnetic, and electrical parameters of the system has been developed and programmed for the IBM 704 Data Processing System. When applied to an experimental NRZ system, excellent agreement between observed and calculated results was obtained. The phenomena of peak or phase shift and amplitude shift occurring for an isolated pair of adjacent ones at high bit densities is demonstrated and discussed. The calculated dependence of the zero-to-peak output and the peak-and-amplitude shifts is shown for variations in the thickness, retentivity, coercivity and squareness of the storage medium, and for variations in the write current, the head-to-medium spacing, and the pole gap dimensions.","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123930140","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}
{"title":"The Magnetic Configuration of Stylus Recording","authors":"H. Kump","doi":"10.1109/TEC.1962.5219359","DOIUrl":"https://doi.org/10.1109/TEC.1962.5219359","url":null,"abstract":"A cylindrical magnetic stylus driven by a coil can be used to transfer bits of information onto a magnetic surface. These bits are recorded as round spots and combinations of these spots can form a desired pattern, e.g., numbers or letters. A mathematical model corresponding to the magnetic properties of a recorded spot is proposed and analyzed. The major considerations in the analysis are the field pattern existing about the spot, the self-demagnetization of the spot, and interference resulting from crowding the spots. Field mappings, obtained with a miniature Hall probe, were used to experimentally verify the proposed model. The experimental results show that the analytic model can predict the magnetic configuration of the spot at distances away from the recording surface that are considerably greater than the surface thickness. An alternate model is proposed for studying spot properties in regions quite close to the recording surface.","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117208075","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}
{"title":"Synchro Circuit with Output Proportional to Input Angle","authors":"R. W. Williams, G. M. Parker","doi":"10.1109/TEC.1962.5219323","DOIUrl":"https://doi.org/10.1109/TEC.1962.5219323","url":null,"abstract":"","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124527057","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}
{"title":"Network Approximations of Variable Time Delays Require Caution","authors":"G. Korn","doi":"10.1109/TEC.1962.5219322","DOIUrl":"https://doi.org/10.1109/TEC.1962.5219322","url":null,"abstract":"","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128708093","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}
{"title":"On the Algebraic Manipulation of Majority Logic","authors":"S. Akers","doi":"10.1109/TEC.1961.5219289","DOIUrl":"https://doi.org/10.1109/TEC.1961.5219289","url":null,"abstract":"","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1961-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130451243","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}
{"title":"Conversion from Conventional to Negative-Base Number Representation","authors":"L. Wadel","doi":"10.1109/TEC.1961.5219290","DOIUrl":"https://doi.org/10.1109/TEC.1961.5219290","url":null,"abstract":"","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1961-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134085834","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}
{"title":"A New Method of Examining the Stability of Linear Systems Using a Repetitive Differential Analyzer","authors":"J. Petrić","doi":"10.1109/TEC.1961.5219291","DOIUrl":"https://doi.org/10.1109/TEC.1961.5219291","url":null,"abstract":"The paper describes a method of examining the stability of linear systems which is based on a conformal transformation of the system equation and the application of Cauchy's principle of the argument. The method requires only the use of operational amplifiers of a repetitive analyzer and it has a number of important advantages over other methods which use analog-computing equipment. Using a very simple transformation, it is possible with this method to examine the stability of linear systems as well as to determine the damping constant. The results can be viewed directly on the screen of a cathode-ray oscilloscope.","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1961-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123473166","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}
{"title":"A Basic Limitation on the Speed of Digital Computers","authors":"W. Bledsoe","doi":"10.1109/TEC.1961.5219243","DOIUrl":"https://doi.org/10.1109/TEC.1961.5219243","url":null,"abstract":"","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1961-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115757787","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}
{"title":"A Modulo Two Adder for Three Inputs Using a Single Tunnel Diode","authors":"K. Menger","doi":"10.1109/TEC.1961.5219245","DOIUrl":"https://doi.org/10.1109/TEC.1961.5219245","url":null,"abstract":"","PeriodicalId":412028,"journal":{"name":"Ire Transactions on Electronic Computers","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1961-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121211635","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}