. ~6~6

(1)

Digital Computer Laboratory

Massachusetts Institute of Technology Cambridge 39, Massachusetts

SUBJECT: BIWEEKLY REPORT, May 16, 1955 To: Jay ,~. Forr~ster,

From: Scientific and Engineering Computation Group

1. MATHEMATICS, CODING AND APPLICATIONS _, 1.1 Introduction

During the past two weeks 628' 'codedprograms were:, run

on-the time' al16~ated,~6 th~ Sci~ntific ~nd ~g1ne~r1ng (S,.and EC) ^{' 0 '}^{- , '}

Group. These programs represent part of the work that has been done' o.

on : 61 ,of the problems that have been accepted by the S'.'and EC o~Group.

1.2 Programs and Computer Operation

Problem

No.

Title

100 106 C.

120 D.

122 B.

123 C.

126 C.

13:1.

132

c.

141 144

C.

155: D.

156 A.

Comprehensive System of Service Routines MIT Seismic Project

The Aerothermopressor Coulomb Wave Functions

Earth Resistivity Interpretation Data Reduction

Special Probl~ms (~taff Tr,ai,;q-1ng"etc • .)

! , ' " " : .' • l ' "

N. C. Milling,Machine SatidEC,Subrout1ne·Study

Self-consistent Molecuiar Orb1tai Synoptic, Clima~ology

~

Reflection in a Semi-Infinite Rect. W.G.

'Minutes

244.4

16.0 196.8 55.6

24;7

"26~4 ^I

188.2 .

~6~6

~O.'3 +~.3

189.:1.

11.0

(2)

DCL-75

1.72

B.

1.93 C.

194

B.

203 C.

204 C. ' 213

D.

2:1.7

A.

21.8' C.

224 C.

225

B. '

226

D.

228

A.

230 c.

235

B.

236 c.

238

B.

241

B.

242

A.

244 c.

250. 252 c.

253

^D.

256. 258 c.

259

^C.

260

C.

OVerlap Integrals

E.V. Problem ~or Propagation or E.M •. Waves Augmented Plane Wave Method (Sodium)

Response or a Build~g Under Dynamic Loading

Ex~~~e .. ~te~~ls Betwee~ Re~l __ ~~ater Orbitals Industrial Process Control Studies _- _-

-. -... -

AtomiC Wave Function and Energies stage B ror Dlatdmic Molecul~s

Vertical Velocity Fields

Neu~ron-Deuteron·Scat~er~ng

,Circulation or the Atmosphere

Evaluation or Dirrerence Dirfus10n Equation _. _, Bridge ~e~pons~ to Bla~t Loads

Eigenvalues ror a Spheroidal Square Well

--^... -- -

Transi~nt Response or Aircraft to Heating·

" . - --

Selr-consistent Calculation or Nuclear Density' Transients in Distillation Columns _-

-.

Counting Structures or Relations

- - - ¥

,Da~a Reduction ror X-1 Fire Control Translation Program ror the NCMM

Anal~sis .. or ^{~o Sto~}Steel ,Frame Building APW as Applied to Face- and Body-Centered Iron WWI -1~03 Translation Program

DYnamic Analysis of an Aircraft Interceptor Iohosphere Computation

"

Energy Levels of Diatom1c Hydrides

page 2

1.87.2 1.9.1.

96.9 5.7 4.3

_{

26.3 48.3 .1.6 196.4

·7.3 .

36.5 17.2 145.9 67.4 11.2 186.8 '

66.4

9.3 ,28.9

25.1

81.7

3.6

91.9

19.6

33.2

40.9

(3)

26~ C. Fourier Synthesis for Crystal Structures

263

C. Aircraft Pullup Flight Path

264'

C. OPt1mization of Alternator Control System

266

A. Calculations for the MIT Reactor

267

B. NCMM Turbine Blade

270

B. Crit1cal Mass Calculations

271

B. Beam Spl1tt~ng Te~hnique

272

L. General Raydist Solution

274

N. Mult1p~~ Scatter1ng

275

B. Buckling of Shallow Elast1c Shells

277

C. ' H~~i~ontal Stab'ilizer ~tudy

278

N. Energy Levels of Diatomdc Hydrides LiH

280

B. Correlation Function

281

C. Correlations and Transforms

282

B. Helicopter Blade Flapp1ng Instability

283

B. Information Handling in. Task ~roups

284

C. GUlf, ,Str~am Motion For~cast1ng

285

C. APW as Applied, t-p .c~omium Crystal

286

B. Responses of the Human P1lot

287

D. Probability Pattern

39.4 '77.0 4.4 1.31.2 53.3 46.0 53.1 4.3 55.9 156.1

42.0

10.4 145.6 14.1 28.4 42.2 14.7 5.2 94.3 3.8 289

C.

29~ B.

293

C.

Heat Transfer Thru High-Speed Lam1nar Boundary Layers

41.5

~ :, ~ ."

.)' :..~:; .

Dynami~ Buc~11ng

Rolling Bear1ngs

~.3 Computer Time Statistics

The following indicates the d1stribution of WWI time allocated to the Sand EC,Group.

7.1

2.9

(4)

DCL-15

ProgramS

Magnetic DrUm Test Magnetic" Tape Test Scope Calibration PETR Test

Test Storage Check

Demonstrations (No.13l) Total T~e Logged

Div~ 6 Conversions~Inter-run

Operations~ etc."

Total Time Assigned Usable Time~ :p:ercentage

Number of Programs_

55

^hours~

3

hours;

61 hours~

44.8

minutes 63.8 minutes

64.1

minutes 10.9 minutes 16.4 minutes

6~1 minutes

8~2 minutes

34.9

minutes 16 hours; 52~9 minutes

19

hours~

48.8

m1nute"s 98.-3

628

page

4

(5)

o

1

6 7

).1

12 13

20 21

2'1

000000 000001 000010 000011 000100

000110 O{)Olll

001010

001101 001110

OOl11~l

010001

01LolOO 0101.0J.

011001

011111

no~~ used

D

not used

s

/

.

₎

D

R

J

(

c

·,ignored

illog~l

acooptod e.ooeptod illegal

a.oc~ptcd

aooopted acoeptoiL.

s.ocept;ecl c .. ,ooop,)v.::,;d aOc0pt;vu

illegal

10 41 42

45 46 47 60 51 52

55 56

so

82

65

70 11 72

?5

100000 100001 100010 100011 100100 100101 100110 10011]:

101000 101001 101010

10].110 101111

110010 110011 110100

1'10110 110111 JJ.l000 111001 11101()

111100 '111101 111110 111111

t T

not uzad

z Z

1 L

teo bula ti on

11

n

uoi:; used p

g Q

o o

upper c(!.so

v

10001" OaS0

o ^o

nullify

acooptoc1

illr;gal

illegal

sam0 0.3 1 i7i c:rno ()~3

.""!

tgc.,Y'l' G l"'ot •.

aocop"GOU

aooeptor).

illega.l aocept;>?3d illogoJ.

G:.ocept;ad illogoJ.

G.ooep"t·::;d :;.110ge.1