M 2870_Biweekly_Report_June_13_1954 2870 Biweekly Report June 13 1954
M-2870_Biweekly_Report_June_13_1954 M-2870_Biweekly_Report_June_13_1954
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Page l"'ef 22 Memorandum M-2870 Digital Computer La'poratory Institute' of Technology Cambridge 39. Massachusetts· Massachu~etts SUBJECT: PROGRESS REPORT &Y 17 mROUGH JUNE 1'3, 1954 . To: Jay 11. Fottester From: Scientific and Engineering Computation Gr~f/(}03 ' fJPf /'dC 4 and hence to the gradient, Q"p = «() Pr/()01)'l + (?J.Ptla02)j + •••• The parameters 01Aare then simultaneously adjusted so that a prescribed increase in Pr (~) occurs for the least change in Mach Number variation. This is accomplished b,y determining the increment in 0i by the equation ~d aOi p \~p\2 This calculation procedure shows great promise for providing a routine method for aerothermopressor design contained on one 556 WWI tape. The time required to effect one systematic alteration in the Mach Number variation is seen to be 5 times that of a single run, the latter requiring on the order of 8 minutes. The gross time, however, is considerablY less than that required for the larger number of arbitrarilY specified eases which would in general be necessar,y. 123 c • .rEarth Resistivity Interpretation: .WI. 105 minutes The program for ana~sis of the Slichter kernel has been tested with more kernel data in an effort to learn more about its behavior. In addition, a program change has been made which allows an indefinite number of iterations, in contrast to the maximum of 25 which was allowed previously, and which increases the parameter-change multiplier ever.y 20 iterations. Four different kernels, three theoretical and one observed. were tried. Two of the four calculations (a four-layer kernel and. the observed kernel)hase wiil be made 0: . The intent here is to obtain knowledge page 17 which should be most instrumental in deciding the nature and origin of these phenomena. For the past two weeks computation was confined to the calculation of traveling spectra of the various component seismograms of aT-Phase whose origin occurred on the North Coast of the Dominican Republic. These spectra were plotted according to a density plot rout~e. The results clearly show that this phase has dispersive characteristics peculiar to Rayleigh waves traveling at a ground water interface. Addi tiona1 computation on other phases originating at different places must transpire, however, before definite conclusions can be made as to the nature of this phase. In the following weeks it is intended to investigate by spectral analysis microseisms recorded at Weston, Mass. in the hope that additional proofs may~ made concerning the nature and origin of these waves o 'rhus far 11 analysis has shown them to·be Rayleigh waves of high frequency generated by standing ocean waves. The following problems used computer time but did not report. 107 c. (a) Autocorrelation and (b) Fourier Transform, Evaluate Integrals 147 minutes 108 C. An InterpretiTe Program. 44 minutes 144 C. Self-consistent Molecular Orbital 62 minutes 167D. Products of Batch Distillations with Holdup 171 C. lmproved Power Spectrum Estimates 173 Course 6.537 Digital Computer Application Practise 174 C. Tight Binding Calculations in Cry-sta1s 175 C. Impurity Levels in Crystals 190 D. Zeeman and Stark E£fect in Positronium 140 minutes 48 minutes 332 minutes 5 minutes 108 minutes 9 minutes 1.3 OQerating Statistics 1.31 Computer Time The £ollowing indicates the distribution of WWI time allocated to the S&EC Group. H-2870 page Programs ConTers ion Magnetic Drum Test Magnetic Tape Test Scope Calibration PETR Test ' Demonstrations (11.31) Total Time Used Total Time Assigned Usable Timet Percentage Number of Programs 18 116 hours, 26 minutes 13 hours,;.( ·P.3 minutes 76····in.inutes 119 minutes 62 minutes 27 minutes 2 hours! 26 minutes 1.36 hours, 39 minutes l70hours t 52 minutes aCYl> 563 1.4 Academic Program as Programming Course Sixteen students were enrolled in the two-week CS programming course which started on June 7. A revised version of the manual c,o.vering the first week 11 s work was issued to each student. Whe:reas the origilial,manual reflected as I, the revised version has been made consistent wit4 the provisions available in CS II~ ?reliminary notes on part of the second week I s curriculum have been issued to the students. These will eventually be incorporated in the manual covering the second week's work. Movie TheS&EC Group's movie "Making Electrons Count" has been completed and will be shawn to Dlgital Computer Laborator.y personnel in the ver,y near future. ~ge 2. 19 CCNPUTER ENGINEERING (S.H.Dodd) Computer reliability decreased during the past biweek~ period, partiallY because of troubles introduced b,y modifications of terminal equipment. Bugs in the recent~ installed Ferranti photoelectric tape reader and failures of the auxiliar.y drum were the major contributors to the lost computer time. The auxiliary-drum write-group-seleetion system is being converted to electronic switching, digit by digit. It was intended to do this without interfering with the use of the auxiliary drum by WI. However, by some means as yet undetermined, the information on group ,11 is occasionally altered during the switchover of the write oircuitry. Sinoe the read-in program is on group 11, this has caused programmers some inconvenience. 2.1 Wi! System Operation (A.J.Roberts,L.L.Holmes) The second magnetic-tape-printout system has been completely checked out and has been placed in operation. ,A memorandum is being prepared that will, explain the operation and flexibtlityof the two systems. (D.A.Morrison) Tube data continues to be collected for the computer-reliability study The da ta is being arranged to alow consideration of blocks of equipment and/or the complete computer. . 0 Measurements are being taken of the in-out control matrices' input and output voltages to assure proper operation. These matrices are not marginal-checked. 2.12 Typewriter and Paper Tape (L.H.Norcott) It has been proposed that the remaining short-carriage Flexo be sent to the factory to be equipped with a 20-inoh carriage and a pinfeed platen capable of handling our wider forms. We are awaiting a quotation from the manufaoturer before proceeding further. 202 Terminal Eguipment 2.21 Magnetic Drums (L.D.Healy) Work has been begun on the cirouit additions and modifications neoessar.r for the addition of two groups of auxiliar,y storage to the buffer-drum systemo page 20 H-2879 3. ADMINISTRATION AND PERSONNEL New Staft (J .C.Proctor) Francis R. Drugin is working as a DDL Staff Member. He had been employed, until recently, as a Technical Engineer tor IBM. Gerald Eo Mahoney is a newDIC Staff Member working for Charlie Adams for the summer. Until recently he was a Teaching Fellow. Ph.D candidate at Boston University. Staff Termination William Klein New Non-Staff Personnel (R.A.Osborne) Jean Bowse has joined Group 62 as a secretar,y. Judith Brask is a new secretary in the Publications Ofi"ice. is a transfer from Group 3. She Lillian Connors is a new secretar,y for Frank R,yder. Frank Veechia is a new technician in the Construction Shop. transferred from the Flight Control Laboratory. Be James Johnson is also a technician from the Flight Control Laboratory who will be working in the Inspection Department. Jean Randall is a new member of the Drafting Room. page 21 M-2870 LIBRARY ACCESSIONS LIST The following material bas been received in the Library, Barta 109. Library Files No. A9 Author 'or Source "0. He~mer Title .Randomness B136 Brainerd; Koehler; Reich and Woodruff Jacques Oattell(ed. ) Ultra-High Frequency Techniques B227 0141 0142 0143 IBM Univ. of Illinois John,L. Jones Cl44 Harwood G. Itolsq 0145 Joint IRE AIEE ADM 0146 Joint IRE AIEE ACM C147 Vol.I- Univ.of Penn. Vol.IV 0148 Vol. I Univ. of Penn. Vol.II g - American Men of Science IBM Assembly Program 701 to 701 Illiac Programming A Survey of Automatic Coding Techniques for Digital Computers Numerical Solution of Three Simultaneous Second-Order Differential Equations Arising in the Low Energy Meson Theory of the Deuteron Proceedings of the Western Computer Conference 1953 Trends .in Computers: Automatic Control and Data Processing - West.Comp.Conf. 1954 Theory and Techniques for Design of Electronic Digital Computers oj Report on the ENIAC 0149 Eo G. C150 Herbert B. Hilton On the Solution of Linear Equations by Diagonalizing the Coefficients Matrix Problem Programming for the EDVAC 0151 Charles R. Williams A Review of ORDVAC Opera.ting Experience C153 C154 Circular Functions Xing, :Brown, and Ridenour Photographic Techniques for Informa.tion Storage 0155 Russell J • Brooke 0156 M. E. Davis 0157 OE The Elliott-N.R.DoC .. Computer 401 Mark I . D41 Fritz John NBS On Integration of Parabolic Equations by Difference Methods D42 Alan L. Leiner NBS John Todd NBS System Specification for the DYSEAO The Condition of Certain Matrices II John Todd NBS The Condition of the Finite Segments of the Hilbert Matrix D37 D38 ~ogbetliantz Applications of Computing Machines to the Problems of General Staffs The Use of Electronic Data Processing Systems in the Life Insurance Business H-2870 Library Aooessions oont. No. Author or Souroe D39 John !odd NBS F173- 101 page 22 !it1e Experiment on the Inversion of a 16 X 16 Matrix Herbert J. Brun Evaluation of Harold A. Sohapiro R. .O;rpser A Cheoker Playing Program for the WI Computer Computer Searoh for Eoonomioa1 Oper~tion of a. Hy'dro !henna.l Eleotrio System an'In~egra1 Equation on WiI F173 .... 111 F104 Distribution List for S &: EO, or Group 6345 Internal Distribution Oe D. S. He Adams Arden Best Briscoe External Distribution-Biweekll OnlZ D. J. H. H. D. D" Helwig 2 copi···· R. Gil~ea F. Helwig E. Hoy J. Rapozynsld E. Ropley H. D. J& M. H. M. M. R. J. H. Mackey R. Miller, 24-510 Marean (5 copiesProt. Morse ( 7 copies), 6-109 Parker of bi- A. RaIson, 2-383 Porter weekly) E. A. Robinson, 2QE-222 Pareohanian D. Ross, Bldg. 32 F. A. J. A. Shaw Siegel Thompson Vanderburgh Carr Combelio Cox Demurjian Denman Boo Bello Bu Humphrey Bo Fellows C. Fleming J .. Frankovich -----~.~--------------------P. Bagley - W F. Heart Dr. Loeb - W J. Forgie - B R. Nelson - B Dr Neumann - W· W. He Thomas - W W. Wolf' Q B. F. M. E. J. Gavri 1, 31-264 Corbato, 6-003 Hellman, Wl-316 Instrumentation Jao obsen, 6-410 C. Little, 6-003 D. Ste rnli gh t, East Campus J Box 19 N. P. Hobbs, 41-219 s. Gravitz, 41-211 M. M. Chen, 41-211 D. Friedman, 24-510 L. Schmit, 41-219 Sydney, l-385A J. F. 0 1 Donnell, 12-127 B. Marrows, Graduate House B. Campbell, 20B-l33 s. H. Paul, 20B-l33 H. Lin, 33-316 M. C. Newstein, 6-003 .,::' 1.1. i: , ~" .. l.. • , ~ cr'. ~ ) C\ :'~. ," ~ \ • t.~, ~ J I, ~ ! :.< ( .. ..1 4 ",I (I , ~; C) ,'L, ·t~ :.~ ~ J. W. Forrester Ro R~ Everett So H'i!I Dodd A. Mo Falcione Dr. Brown, 4-202 F. M. Verzuh, 7-306 Bldg. 32 - Library 14-Notes Only Ae Meckler 6-320 KII Vozof'f 24-032 GD Dinneen Bldg. B-333 Linooln Air Force Cambridge Research Center Attention: Document Room--CRQ-SL-1 230 Albany Street Mathematics Branch Division 6 - Librar,y (15 to 20 copies) Office of Naval Research M's by Be Paine--1 dop,r to V. Savio Washington 25, D.C. AV s--1 to Ro Nelson One copy to Barta Reception Desk (Envelope) A,P~Kromer (10 copies of M-Notes for I.B.M.)
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