SCIENTIFIC ABSTRACT V.V. CHAVCHANIDZE - S.S. CHAVDAROV

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• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000308210010-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 12, 2000
• Sequence Number: 10
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

CH&TORANIMS
. 2 wo 0036 4 W t-, -~,- - ~
Use of ravA*E testing techniques for calculating Intramiclear
cascades.
Isv.AN SWR Ser.fis.19 no.6:629-638 N-D 155. (MIRA 9:4)
loInstitut f1s1ki Akmd=II nauk Grus,89A.
(Commie rare) Okclear physics)

-S, W
---"w
USSSR/~',.'uclear Physics - Neutron distribution FD-IL-5 5
Card 1/1 Pub. 146-15/25
Author : Chavchanifte, V. V., and Cheyshvili, 0. D.
Title : Letter to the editor. Finding the energy distribution function
of neutrons
by the 14arkov method
Periodical ; Zhur. eksp. i teoro fiz. 28, 369-371, March 1955
Abstract : The authors attempt to discuss certain problems in the
theory of slowing
of neutrons in the case where the slowing occurs as a result of elastic
Collisions with the nuclei of the moderator (A. I. Akhiyezer and 1. Ya.
Pomeranchuk, Nekotoryye voprosy teorii yadra. (Certain problems of
nuclear
theory), GITTL, 1950), namely by the use of the Markov method (V. V.
Chav-
chanidze, ZhETF 26, 179, 185, 1954). Their results are also convenient
for the case of thin layers of the moderator, where the number of
elastic
collisions is small (less than 25-30)- Eight references; e.g. V. V.
Chav-
chanidze, Dissertation, Thilis State University, 1953).
Institution: Thilis State University
Submitted : July 28, 1954

nytanj zg.-V6- V.-.Dn-the Cq a f
ti cuuntm electro-
11 Ons 0
VITU
Mad, Nauk G zin. SSR 17 (1956),
15 20 (Russiaan)
0, the basis of certain assumptions, such as that the
electromagnetic vector pDtential is "pressed in terms of
a scdar "photomeson" fieAd, a set of field equations for
the electron-pasitron and "photonneson" fields is ob-
tained, N. Rosen (Haifa).

Iv blo
iUTHOR HIMAKASHVILI, Id. M. I.CHAVCHA ITINE. V - VUMA LADZE, Yu
. G 56-5-38/55
'TITLE On the Nature of the Pield Punction.
(0 prirode polevqy funktaii,-Russian)
PERIODICAL Zhurnal Ekqperim.i Teoret.Fiziki,1957,Vol 32,11r
5,PP 1236-1237(USSR)
ABSTRACT The neutrality or the stato of being charged of a
given wave field,
i.e. the neutrality or the state of being charged of the
particles
corresponding to itlare closely connected with the character of
the
field functions (be they real or complex).At the present stage
of
investigations it is not possible to determine from the form of
the
field functions, i.e. from their algebraic structure,whether a
given
wave function enters into interaction with any
nonelectromagnetic
field.Thus,at the present stage of theory,the fact of the
existence
of a nonelectromagnetic interaction between the given
alternating
fields does not impose any conditions on the character of the
rele-
vant field quantities.But in the interaction vith the
electromag-
netic field there exists such a condition (i.e. the field
function
is then complex).The authors of the paper under review use as an
example a spinor field that can be characterized by a
four-compo-
nent spinor.The interaction with a mesonic field is introduced
(con-
trary to the interaction with the electromagnetic field) in
such a
way that no conditions are imposed on the field function of the
epi-
nor field (or of any other field).This,however, means that in
pre-
sent theory of the wave fields the electromagnetic field
occupies
Card 1/2 a special position.From"this fact two conclusions can
be drawn:Ei-

On the -Nature of the Field Function. 56-5-38/55

ther this special
position of the electromagnetic field is recog-

nized or the
following concession is made:The present theory has

not yet been
able to find an adequate apparatus for expressing the

particularities of the really existing wave fields by imposing ad-

ditional conditions upon the field quantities of the fields stan-

ding in interaotion,The first conclusion can not be
accepted,becau-

se it does not provide for any way out of the dead
end of the pre-

sent mesonic theory.The second conclusion could
serve as basis for

an attempted generalization of the concept of
the wave function.

In other words,such conditions must be obtained
which must be im-

posed on the relevant field functions in order to
realize the one

or the other interaction.Thus it would be possible
to make the hy-

pothetic presupposition that the field fianction of
the wave field

must be a hypercomplex number,in particular a
quaternion.The paper

under review outlines these lines of thought
in somewhat greater

detail.

(No reproductions)
ASSOCIATION
Institute
for Physics,kcademy of Sciences~of the Georgian SSR.
PRESENTED BY

SUBMITTED
5.11-1956
AVAILABLE
jibrary of Congress.
Card 2/2

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CHAVCHAVIDO, V.V.
Primary '-Ialphnbotw of denoxyribonuclele acid. Di0fisika 3
n0,4:
391-195 JI-Ag 158 (MIRA 11:8)
1. Fistcheekly f&ulltet Tbillaskogo gonudarstvennogo
universiteta
in. LV. Stalluse
(DESOXMIBONUOLNIC ACID)

56-34-4-2o/6o
AUTHORS: Chavchanidze, V. V., Shaduri, R. S., Kumsishvili, V. A.
TITLE: The Calculation of the Electron-Photon Cascade in Lead by the
Monte Carlo Method (Raschet metodom Monte-Karlo elektronno-
-fotonno,ro kaskada v svintse)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1958,
Vol. 34, Nr 4, pp. 012 - 915 (USSR)
ABSTRACT: This work describes the statistical probability molding
based
on the method of random trials (a modification of the method
by Monte Carlo). This work only describes the scheme of the
calculation of the cascade omitting details. The range of the
y-quantum in lead until the first process of interaction is
"drawn". The "drawing" is made for the integral curve of the
dependence of the total cross section on the energy of the quan-
tum. Then the "fate" of the y-quantum is drawn. In the case of
pair production the energy of the positron is drawn and from
it then the energy of the electron is ascertained. Subsequent-
ly the amounts of the ionization losses and thus. also of the
Card 1/4 energy of the components of the pair before the following

The Calculation of the Electron-Photon Cascade in Lead
56-34-4-2o/6o
by the Monte Carlo Method
collisions are determined. Simultaneously also the correction
for the multiple scattering is "drawn". The energy of the
bremsstrahlung quantum was ascertained by tile method of the
construction of non-normalized integral curyes with unequal ar-
gument scales. The scattering angles were "drawn" without con-
sideration of the correlation between the scattering angles of
the quantum of the electron. In the case of destruction the
scattering angle of the one y-quantum in the center of mass
system is "drawn". From the data obtained by this also the
scattering angle of the second quantum is ascertained. The re-
sults thus obtained are plotted in form of curves for the
energy
distribution and for the angular distribution of the electrons,
positrons, and y-quanta (as functions of the generating angle
of the observation cone). The computation of the
electron-photon
cascade.-is unusually long. For the factual performance.of the
computaiions electronic high-speed computers are necessary. The
existing machines need not be rebuilt at all but a correspon-
dingly performed programming is sufficient. Here 2 of such
Card 2Y4 programming methods are shortly described. It is a
particularity
I

The Calculation of the Electron-Photon Cascade in Lead
56-34-4-2o/6o
by the Monte Carlo Method
of the first method that in the constant memory the arguments
of the given probability functions are stored in a certain
order. The second programming method allows the introduction
of these functions into the storing device. According to the
opinion of the authors the whole efficiency of the
calculations
by the method of random trials shows up only in case of the
application of electronic computers and in case of adapted
programming. The authors thank A. V. Tagviashvili, B. 1. Bo
~da-
revich, L. L. Esakiya, G. A. Goradze, M. Ye. Perellman, G. A.
Almanov for their participation in the-practical performance
of the computations. This work was performed on the
suggestion
by Professor V. F. Dzhelepov in connection with the necessary
estimation of the probability of the non-emission of
electrons
and positrons from lead plates of little thickness. The
authors
thank Professor Dzhelepov and his collaborators for his
atten-
tiveness and his interest in this work. There are 3 figures
Card 3/4 and 7 references, 4 of whi-ch are Soviet.

The Calculation of the Electron-Photon CaDcade in Lead
56-34-4-2o/6o
by the Monte Carlo Method
ASSOCIATION: Institut fizihi Akademii nauk Gruzinskoy SSR
(Institute of Faysies
S~R)
SUBMITTED: September 23, 1957
1. Lead--Nuclear reactions
Card 4/4

Perellmant 14. Ye. Sov/56-35-1-50/59
AUTHORS:
TITLE: On the Theory of the Neutrino (K teorii neytrino_)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskey fiziki,
1958,
Vol. 35, Nr 1,. pp. 296 - 298 (USSR)
ABSTRACT: This paper demonstrates that all the experimerital
results described by the trio-component theory (Ref i)
may be explained without the introduction of a longitudinal
unsymmetric neutrino. The authors suggest that this
hypothesis be replaced by the assumption that a quantum
mixture of 2 light neutral Dirac (Dirak) particles flies
off in the P-, g, and n-decays. These Dirac (Dirak) particles
have opposite parities. The relation between them is that
of particle and antiparticle and therefore a new rule
for the conjugation particle- antiparticle is introduced.
For the sake of simplicity the authors investigate only the
P-decay which is characterized by the Hamiltonian
H -.~ c-(~ Q ~ )(TOi~ In the twe,,component theory there is
tM I n i p
Card 1/3 = (';: YO~V/r2 (~,u "7 Y0V)/'F2 , and the authors

On the Theory of the Neutrino SOV/56-35-1-50/59
for the sake of definiteness put 'T . The authors'
hypotheois may be reduced to the hypothTfis that
(E)= ~-(_E) _Y0+ (E) behaves like the wave function
whereas ~,,= (E) is the wave functions . For a neutrino
the transition frtmLtr + 0 to the corresponding
equation for the antiparticle (E) = 0 ma'y be
carried out by means of the above mentioned relation. The
wave function of the real antiparticle is different from
zero also in the non-relativistic limit. According to the
above-mentioned relation, the Hamiltonian mentioned in
the beginning of this paper with t(+) gives
the same cross'sections of the decay phenomena as in the
two-component theory. The asymmetry of the decays is not
interpreted as a consequence of the properties of any
particle, but as a consequence of the properties of inter-
action itself, i.e. - of'the non-conservation of the
lepton charge. The selectivity of the interaction is ex-
pressed by the choice of the phase factor of the quantum
mixture which flies away. The author expresses his thanks
Card 2/3 to V.I.lAamasakhlisov for his useful discussions
and for his

On the Theory of the Neutrino
SOV/56-35-1-50/59
interest in this paper. There are 5 references, 3 of which
are Soviet.
SUBMITTED: December 24, 1957
4
Card 3/3

CHAVCHANIDZZE P. V.V. SHADMU 0 R.S.
Method of statistiml-*babilietic mode3ing applied to the
'un
calculation of-i ctional integrals of the FeyMftan tYPee
Wiener and Fresnel measures. Trudy Inst. fiz. AN Gruz.SSR
7:105-111 160. (MIRA 34:10)
(Sampling(Statistice))
(Integrals)

A 00 0
AUTHOA:
TITLE:
S/194/62/000/606/055/232
D295/D308
Chavchanidzet V.V.'
The use of statistical-probability models as a
possible design principle of control systems
PERIODICAL: Referativnyy zhurnal. Avtomatika i
radioelektronika,,
no. 6', 1962j, abstract 6-2-130 v (V sb. Primeneniye
vychisl. tekhne dly4 avtomatizo proiz-vag 1T.q..Mashgizq
1961, 52-62).
TEXT: A design principle of control system is considered based
on
the nethod of statistical-probability modelling.-The Monte
Carlo.
methods are the basis of this principle. The direct and inverse
Monte Carlo methods are considered as well as the method of
random
tests. These methods make it possible to simulate various,
processes
and, what is particularly important, processes that do not lend
themselves to analytical design. A typical feature is the fact
that
no model is constructed for a determined object but the designed
system constructs, regenerates and stores a model of the object.
LAbstracter's note: Complete translation.]
Card 1/1

32573
3/621,/61/000/000/006/014
AtSo /0-3 1? T3 1003) D234/D303
AUTHORS.* Chavchanidze, V-V-9 and KUM18ishvilip V.A.
TITLE: On determining distribution laws on the basis of a
small number of observations
SOURCE: Nauchno-tekhnicheekoye obahchestvo priborostroitellnoy
prOMYBhlennosti. Primeneniye vychislitellnoy tekhniki
dlya avtomatizataii proizvodstva. Trudy soveshchaniya,
provedennogo v oktyabre 1959, g. Ed. by V.V. Solodov-
nikov. Moscowt Mashgizq 1961, 129 - 139
TEXT: The authors propose an empirical method of constructing the
distribution function of a random quantity X in the case when the
number of its observed values is very small (not larger than 10).
According to the usual method which the authors call classical,
the
density of the distribution function is considered as infinitely
large at all x = x i (i = 1, 2, ..., n) and equal to 0 at all
other
points, i.e. it is supposed that only these specified values of x
could appear in the test and the probability of any other values
is
Card 1/4

32573
3/621/61/000/000/006/014
On determining distribution laws ... D234/D303
0; this seems to be unjustified lf the number of data is small.
The
authors assume a priori that: A) The true distribution function
f(x) of a random quantity X is larger than 0 in the interval bet-
ween x = a and x = b and equal to 0 outside it; B) f(x) is conti-
nuous and has no excessively steep rises or descents within the
in-
terval. If there are no observed values of X one can still
indica- VY
te the form of f(x) corresponding to the information already
avai-
lable. The only sibility consistent with the information is
fO(x) = 1/(b _ a~osinside the interval and fo(x) = 0 outside,
i.e.
when no value of X has been observed one can only assume that all
*alues have the same probability inside (a, b). If there is one
ob-
served value x 1 the classical formula would be
fl(x) = S(X - xJ) (7)
which cannot be considered as the beat approximation to the true
f(x); it is farther away from the latter instead of being closer
than fo(x). One should not construct about x, a delta function,
but
Card 2/4

32573
S/621/61/000/000/006/014
On determining distribution laws ... D234/D303
some continuous function which may be any one that is
symmetric.
The authors choose this function (called the insertion
function)
equal to 1/d in the interval (X 1 - d/29 x1 + d/2) and to 0
outside
it. To obtain a new approximation to f(x) one must add the
above
function to fo(x), both being muitiplied by corresponding
weight
factors; the latter are equal to 112 as there are no reasons
for
selection. If there are 2 observed values the reasoning is
analo-
gous. For n observed values
f W - 1 f fo(x) +
n n + W (16)
the insertion functions here must be corrected so as to give
f,,(X)
= 0 outside (a, b). The formula was checked by the authors
with the
aid of the Monte-Carlo method for two different laws of
distr4bu-
tion; the results are described. It is stated that ihe
au"Cohors
found the form of the insertion function
Card 3/4

32573
S/621/61/000/000/006/014
On determining distribution laws ... D234/D303
YX W = ki2 2 (20)
i . (X - xj) + d
to be sufficiently close to the optimum form-, ki is the
normaliziig
constant depending on x i and d a parameter which must be found
em-
piricallyo After every experiment one can extract the most
reliable
information and use it in the appropriate way; the full
information
will be the sum of corresponding variations
I A 10 + Al 1 + ... + _,AIn' (21)
There are 2 tablesp 4 figures and 4 Soviet-bloc references.
Card 4/4

SKHIRTLAME, R.L.; CHAVCHANMZE, M.
Sy"sis of discrete stochastic units. Soobe AN Gruz.
SSR
27 no.5:529-536 N 161. (KIRA 15-.1)
1. Akademiya muk Gx~ toy.SSR,, Institut kibernatiki,
Tbilisi.
Predstavleno almdamikom V.I. Nommmakhlisovym.
(Cybernetics)

CIIAVCWIDZE, V.L,, kand.fiziko-wtematicheskikh nauk;
KVINIKHIDZE,, K.S.0
MI A tj _qhiy nauchw sotrudtdk
MxW1 of the Obydrogen atom* of biology. Milks I zhi=l 29
no*4:31-32 Ap 162. (MIPA 15:7)
(Cello.-MxW29)

CHAVCHANIDZE, V.
Living model or a model of a living being? Znan.-aila 37
no.6:19 J9 162. (KMA 15:9)
1. Direktor Instituta k1bernatiki AN Grusinskoy SSR.
I .(Cybernetics) I
. I

CHAVCHANDZEV V. -Vi- .
Stochastic aggroptes and probl~ of informtion th;;qO TrudtF
Inst,fis,AN GmsSSR WM285 162. . . 16&2)
(Aggregates) (Information theory

-CHAVCHkNID
The inverse Monte Carlo method. Trudy Inst.fiz.AN Gruz.SSR
8s287-293 162. NM 16s2)
(Distribution (Probability theory))
I I

,CHAVCHANIDZE. V.V.j BUDEYEV, I.N,j MIXELADZE,
Z.N.; KUMISHVILI, V.A.
ZZ-~
A now metbod for adding and subtracting binary
digits IW
high-speed'digital. comqmters, Trudy Inst.fis.AN
Grux.SSR
8013-321 062. (KMA 16s2)
(Electronic digital coqmters)

AccEssioN m: m4020777 s/0273.1rA100010021DO1613016.
SOURCE: RM. AvWmst. 9 tolemekh. I vechislitel. tokhaikal Abe. 2B93
AVMOR: Chavdhs~ldzsp Ve V.
TMZ: Statistical probability or stmalating physical processes and
structures
Cr= SOURCE: Tr. In-ta klbwmtlkl, AN GruzSSR, v. 1, 1963, 13-18
TOPIC TAGS: functional Isomorphism, probability, statistical
probability, pro-
coos simulatlonj, structural simulation, physical simulation,
cybernetics
TRANSLATION: The concept or functional isomorphism to examined and
it is noted
that there are many objects whose fundamental principles of
existence can not be
described by a functionally Isomorphic model In terms of classical
Lagrangian
formalism and vh1ch include probability phenomena, many-particle
phenomena, etc.
A basis Is dravn for using.& random test method for simulating
complex physical
processes and structures. The possibilities of using statistical
probability
simulation and the range or Its applicability are examined. The vork
done in
Cwd 1/2

I...
: I:-
I - I- ---- ---,
i
- a- -

64/900/003/VO55/VO55
I'ACCESSION NR: AR4039311 SlOO44/
'SOURCE: Ref. sh. Matematika, Abs., 3V236
:,;AUTHOR: Chavchanldse, V. V.
-ITITLE: Entropy operations an digital system
ICITED SOURCS: Tr. In-ta Itibirnatiki. AN Crus=, v. 1, 19630 19-23
ITOPIC TAGS: digital systow entropy operation, Boolean varla~lo
ordered totality,
;B6olean aggregate, logic#1 function, logical function ordered sequenq*
TR?MSIATION: An ordered totality (xlq %) of Boolean variables Is
called a
Moolean aggregate. The author discusses operations on Boolean
aggregates, which
ireduc6 to obtaining new Boolean iaggr*gates. '19ach variable of the
now aggregate is
obtained by applying a certain logical function to corresponding
variables of ag-
.,.,"gregatos which take part in the operatiom, the selection of the
logical function
for"a given position*can depend an values of the defined variables.
The author can-
alders opez;kt 101is an aggcwt" of the toole
CWd 1/2

ACCESSION NR: AR4035563 S/0271/64/000/003/BO10/BO10
WJHCZs Ref. sh. Avtonat., telanekh. i vy0chiel. tekhn. Av. t. # Abe*
3850
AMOR: Bokuchava, 1. T.; Chavchanifte, V. V. I Xmisishvili, V. A.
TMXs Stachastia-logical. generation of digital aggregates
CITED SOURCE: Tr- In-ta k1bernsti1d. AN GruzSSR, Y. It 1963, 25-35
(,TOPIC TAGS: stochastic process, stochastic process generation,
Markoy chain
generation, stochastic logical. generation
iTRUSIATIONs Generation of stochastic processes, particularly, of a
simple
homogeneous MarkovIs chain with a discrete time by means of functions
of the
algebra of logic is considered. Four generator types developing one
and n syWmls
per unit of time are presented. For each generator, probabilities of
pij
transitions from the 1-th state to the J-th state are calculated; the
maximum
probabilities Ri of the transitions are needed for estimating the
process entropy.
It is proven thit by selecting suitable values of probability of wing
various
logical functions, randan processes with the required pi and Ri am be
obtained,
1. a., the stochastia process am be'oontrolled in a cyeiriar~ sense.
An exasple in
Cwdl/2

I
I

ACCESSION 16: AR403lo86 S/0044/64/000/002/VO13/VO13
-SOMCE: ReferatlvnyW7 zhurnal. Mete"t0a, Abs. 2VTT
AMHOR: Namoredze, N. Ze; ChavchanjdzOp V- V-; XMishvills V. A.
TITLE:
A statistical-probability simulation for making linear polymerle chains
conformal In strongly 41.1uted opening@
CITED SOURCE: Tr. In-ta kibernetiki,, AN GruzsSRj, V. is 1963,' 93-103
TOPIC TAGS: statistical-probability simulation.. conformal linear
polymeric chain,
polymer configurational statistics# binyl polymer chain
TRANSLATION; The autbors consider a nev method for studying the
configurational
statistics of polymirs and they demonstrate the fundamental
possibility of a
statistical-probability simulation for polymeric chains. They compare
an algw-'
itbm for calculating,, by means of the Monte-Carlo methods the
conformation Of
separate chains of bluyl polymers v1th massive velptse A-uthars'
absWact
D= 19Har" CE 00
cm,

1AIC=X= Mt MWWM 81WW6k100Q10021DM1X*5
80~t IM. Avtmto# telmmeft.- I vy0ebielltel. Ukhalkap Abe. 2UM
AURMORS WAkrWsV# I* 'No ICho dhouldnef To V.; NswalWans YU. 8.1
Bergeymokat
No Da
W=t Circuit for distlagalsbIng mm6m In uo&dms In, hI& speed electromic
am 9=01: It. In-to kibwmtgdp M OruzM, v. Is 1-961, 1-05-110
TWC TM: absolute oampamtwv accumda,",p bla-speed accumdator,, absolute
Val" cowriscut 00"Pters comperator circuit absolute value
TRANUATICE: A ftftm Is described fOr comperIft the absolute values ct
UO
nuftere A and 3 vltbmt w6tractloa operations or anallels of the
result. The
Ioperation of to dIfferentlator Is based on a knom method of
comparing the ab
solute values ubm positlowd moUtIon Is used for the numbers. fte
methad Is
rowghly stated thus: the nufter vbme left-band digit Is the top digit
bas the - Vvester mdulus. In the b1my system, the algwIthm fm IN

AOMBM M: MhOMW
the absolute values or two A and 3 appears as ronows: the Identical
bite
or the widbers A and 3 are scanned sequentially beginning with the
lert-band digit
until the bits beving different Almits we found (10 or 01); the
nuiber baying 1
In the IndicatedUlt boa the greater absolute value. Mw sebamtic
diagraa for
realizing this principle Is given (see enclosure). Four AND
circuits In eseb bit
are controlled by IrAput trlgpws or the registers containing the
mmbers A and B.
They detuminis the binary digit combinations 110 000 10j, and 01.
84gW from
the AND circuits travel over Wo palths. Wben 1i1 xo and T is the total time
of
the observations. Plots of this quantity are shown in
Fig.2.
Acknowledgments are expressed to G.A. Vakulenko for
assistance
in the analysis of the observations.
There are 2 figures and 4 referencesi 3 Soviet-bloc and I
nor.-
Soviet-bloc. The English language reference reads as
follows:
Card 2/f --7
1>

33218
An estimate of the stability of ... S/l4l/61/oo4/oo6/oo4/ol7
E032/EI14
Ref.2: J.A. Thomas, E.K. Smith.'
J. Atm. Terr. Phys;,-v.13, 295 (1959).
ASSOCIATION: Rostovskiy-.na-Donu gosudarstvennyy universitet
.(Rostov on-Don State University)
SUBMITTED: March 8, 1961
Card 34

CHAVDAROV,, S.S.; CHASOVITZ.. Tu.K.
Stability of radio wave reflection from the opcwadic E
layer
accuNWw to obseratiow in Rootov-on4w. Geemag. i aer.
2 nb.2:249-256 Mr-Ap 162. Oam 15:6)
1. Rostmkiy-ns4onu godWaretwomyy univmitets
(16nospWic radio,vm propkgation)

S/904/61/000/000/010/011
Some results of. D218/D308
was sufficiently -quiet, but there was considerable thunder-
storm activity giving rise to considerable interference. Never-
theless,,.continuous recording of ionograms was successfuily
-he effect-ve
accomplished, and graphs are now reproduced showing
heights and critical frequencies during the eclipse. The behav-
ior of the ionosphere-.,at.the two points was very similar. The
critical frequen cies.of the P layer during the eclipse were
higher-than the median-.values before the eclipse and very dearly,-.
:equal to them after sunset., A.considerable reduction in f E
was noted 6 hours before the eclipse, reaching a maximum reduc-
tion at 3 hours before'-the maximum phase. Atime plot of
'Cos 1/4% was found to be app roximately the same as the course
0
of f E up to about 12 hours. Thereafter there was a considerable.
discrepancy There are,~2.figutes and 1 table.
ASSOCIATION: -Rostovskiy gosudarstyennyy universitet (Rostov-
State University)
-Card 2/2