SCIENTIFIC ABSTRACT KOVTUN, D.G. - KOVTUN, M.S.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000825710005-3
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: July 31, 2000
• Sequence Number: 5
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

KOVTUN,, D,G,A kaMOfjz~-,aatem~nauk,, dotsent
Machine calculation and design for smothness of railroad curves.
Vent.TSNII M 21 no.306-57 162. (MIRA 1535)
1. Khaj7lkovskiy institut izxzhenerav zheleznodorozhnogo transporta.
(RaIlroads-Curves and turnovers)

xOrfull, D.G., kand.fiz.-matem,nauk, dotsent
Bases of programing the'smoothness projection of railroad curves.
Trudy IMIT no..YI.1:11-28 161. 04IFA 15.,2)
(Railroads-Curves) '

KOVTUNO F. ri.
23509 FOR MIROVAHIYe T ISPOLIZOVANTYe MNCWMATOOhNYKh MSY.
PChELOVODSTVO, 1949, No. 7, C. 29-30.
SO: IETOPISI NO. A, 1949

KOVTUN, F. N.
Bee Culture
Productivity of colonies with more thnn one ~ucan. llchelovodstvo, 29, No. 7, 19r2.
I
Monthly Lipt of Russian Accessions, Library of Congress, October 1952. UICLASSIMD.

KOWUNP F. N.
Bee Culture
Transporting bees in closed hives. Pchelovodstvo 29 No. 8, 1952.
Monthly List of Russian Accessions, Library of Congress, November 1952. UNCLASSIFIED.

XCHUN.F.K.
r- , - - - -1
Increasing the productivity of the S-251 mortar pump made by
the Prilukakii Factory. Rate. i isobr. predl. v stroi. no.106:
6-7 '54. (MIRA 8:10)
(Plastering)

KOVTUN G.
Device for heating track windshields. Avt.transp. 34 no.9:30 3 156.
(Km 9: 11)
(Notortrucks--Windows and windshields)

KOVTUTI, G.
'rho accident Was stopped. Pozh.delo 7 no.7:28 Jl 161.
(MIRA 16:11)

rOVTUN
. , G. T.; K~% INIEDY, B.N.
Modernization of apparatus for the electrostimulation of muselse.
mea.prom. 14 to.6:51-53 Je 160. (MIRA 13:6)
1. Mookovskiy zavod elek-tromeditsinokov knparatuz7.
(XUCTROPHTSIOLOGT)

KOVTUN _gf.-jZovtun, H.P.J; KRUGLYM, A.A. [Kruhlykh,, A.A.];
-~~WVLOV , V. S.
Determining the vapor pressure ba metals from the vaporization
rate, Ukr. fiz, zhur. 6 no-3:386-389 MY6-Je 161.
(MIRA 14:8)
1. Fiziko-telfticbeakiy inatitut All USSIly ge Khar'kov*
(Vapor pressure)

S/18 62/007/003/014/015
D299YD301
It U T 11011 ? 3 Kovtun, H.P., Kruhlykh, A.A. and Pavlov, V.S.
TITLE: On determining the vapor pressure of metals by the
,rate of evaporation from a cylindrical crucible
PERIODICAL: IJkrayinslkyy fizychnyy zhurnal, v. 7, no. 3, 19062,
336 - 337
TEXT: The dependence of the rate of evaporation on the ratio
of the length;- to the diameter d of the crucible, was investigated for
s-ilver (', = 0.15) and chromium (u-= 0-5); :A is the coefficient of eva-
poration. Molybdenum crucibles were used, with different L/d. From a
formula, obtained by the authors in an earlier investigation, it follows
that if the ratio ,.,Id is sufficiently large, the vapor pressure can be
determined by the formula
G -\fE27T. RT
P
S - K x
(2)
Card 113

S/185/62/007/003/014/ol5
On determining the vapor pressure ... D299/D301
where G is the rate of evaporation, S -- the evaporation surface and
K -- Clausing's co 7efficient. A figure shows the dependence of the rate
of evaporation on t,/d. It was found that, from a certain value of""/d
on, the rate of evaporation changes only insignificantly at constant
-1 /d, for
temperature. There exists, for various metals, a certain ratio
which the vapor pressure is expressed by formula (2). For chromium, this
value is 1.1/d 5~8-5- In order to verify this assumption, the vapor press-
u:-e of chromium was measured at temperatures of1200 - 13500C. The eva-
r,oration took place simulataneously from 2 cylindrical crucibles, with
"'/d = 6.5 and'~/d = 4.5, respectively. The rate of evaporation was found
to be practically equal in both the long- and the short crucible. A fig-
ure shows the temperature dependence of the vapor pressure, calculated
by the rate of evaporation from the crucibles with '~/d = 8.5. By process-
ing the results by the method of least squares, the following equation
for the vapor pressure of chromium in the temperature range of 1200-13500C
is obtained; 1gP = 10.890 - 20830/T, which is in good agreement with the
results of other investigators. There are 2 figures, 1 table and 5 refer-
Card 2/3

S/185/62/007/00-1/0!4/015
On determining the vapor pressure ... D229/D301
ences: 4 Soviet-bloc and 1 non-Soviet-bloc. The reference to the English
language publication readB as followst M.G. Rossman, J. Jarwood, J.Appl.
Phys.9 5, 7, 1954.
ASSOCIATION:
SUBMITTED;
Card 3/3
Fizyko-tekhnichnyy instytut AN URSR (Physicotechnical
Institute of the AS UkrRSR), Kharkiv
December 1, 1961

S/1*85/62/007/ 004/0 14/0 18
D407/D301
AUTHOIRS: Kovtun, P.,-Kruhlykh, A.. k., and Pavlov,
V. S.
Vanor ressure and evaporation coe'L-Fic-ent of
- p
nickel
P-?RTODICAL: Ukrayins'kyy fizychnyy zhlirnal, v. 7, no. 4,
1962, 436-437
TEXT: The vapor pressure and the coefficient of evaporation
of nickel were de-vermined by the method of evaporation irom a
cylindrical crucible and by Knudsen's effusion method. The
first method was described in an earlier work by Lhe authors.
Thereby, the vapor pressure was calculated by the formula
G -V~~RT
P +
S K
Card 1/3

S/185/62/007/004/014/018
Vapor pressure and ... D407/D301
-e of evaporation, S--the evaporation 3ur-
where G is the rat
face, K--Clausi-ng's coefficient, and oe, --the coefficient of
evaporation. No appreciable changes in the rate of evaporation
were observed during the evaporation of nickel from cylindrical
crucibles with different K. Therefore, the vapor pressuSe of
nickel was measured, in the temperature range 1190 - 1355 0, on
the assumption that oe, = 1. The experimental data, processed
by the method of least squares, yielded the following formula
for the vapor pressure of nickel:
22360
19P = 10-562
T
This formula is in good agreement with the re2ults of other
investigators. In order to verify the above results, Knudsen's
method was used. Thereby, the nickel was evaporated from effu-
sion chambers with two different sizes of aperture. In this
aase, too, no appreciable changes in the rate of evaporation were
Card 2/3

xL'--U-
IVANOV, V.TE., KRUGLYKH, A.A., PAVLOV, V.3., MMA-a-p- AM A'MD!lEITM,V.M.
"Meaffurmnt of tho vapor pressure of uranium containing compounds."
Repvrt preannted at the IAEA Symposium on the Thermodynamics of Miclear
Materials.
Vienna, Austria 21-26 May 1962

KOVTUTI, G.P. [Kovtun, II.P.1; KRUGLM~ A.A. [Kruhlykh, A.A.]; pAVLOV, V.S.
Determination of metal vapor elasticity by the rate of evaporation
from a cylindrical crucible. Ukr.fiz.zhur. 7 no.3-.336-337
Mr I W . (MIRA 15:7)
1. Fiziko-tekhnicheskiy institut AN USSR, g. Kliarlkov.
(Metalas Effect of tDmperature on)
(Evaporation)

. [Kovtunp H.P.J; KRUGLYKH, A.A. [Kruhlykh, A.A.]; PAVLOV, V.S.
Vapor pressure and the evaporation coefficient of nickel. Ukr.
fiz.zhur. 7 no-41436-438 AP 162. (MIRA 15:8)
1. Fizi-ko-tekhnicheakiy institut AN UkrS,SR) g. KharIkov.
(Nickel) (Vapor pressure)

AMOUENKO, V.M.; KOVTUN, G.P.; KRUGLYKH, A.A.; PAVLOV, V.S.
Absorption of air by aluminum mcide. Ukr. khim. 2bur. 29
no.10:1109-1110 163. (MIRA 17:1)
1. Kharikovskiy fiziko-tekhnicheskiy institut AN UkrSSR.

-ACCESSION NR: AP4033131 S/012c)/64/000/002/0130/013Z
AUTHOR: Kovtun, G. P.; Krugly*kh, A. A.; Pavlov. V. S.
TITLE: Electron-beam gun for determining rate of evaporation of low-volatility
materials
SOURCE: Pribory* i tekhnika eksperimentaLo. 2, 1964, 130-132
TOPIC TAGS: electron beam gun, low volatility, low volatility material
vaporization rate, evaporation rate
ABSTRACT: Unlike 1. Pierce's ideal system (J. Appl. Phys., 1940, 11, 548),,
the gun described in the p37asent article has both cathode and anode in the form of
two semiplanes at an angle of 1350. Three guns. (see Enclosure 1) have a
Common anode' 1 and separate cathodes Z with moly lead-ins 3. Slits 4
(55x5 mrn) serve to pass.~he electroh beams, while slit 5 (40x6 nun) is intended
for viewing,.- Channels 6 pass cooling water'. 14ax electron current, 1-1. 5 =P
ills

NR: AP4033131
at8-10kv. Specimens of up to 8x30 m-m are acceptable. Tungsten and graphite;
specimens were heated up to 3,OOOC. The gun is recommended for studyingthe-
evaporation rate, vapor pressure, recrystallization, cyclic thermal treatment,
and other high-temperature problems. Orig. art. hag: 2 figures and I table.
ASSOCIATION: Fiziko-tekbnicheakiy institut AN UkrSSR (Physico-Tacbnical
Institute, AN UkrSSR)
SUBMITTED: 30May63 DATEACQ: 11M&y64 ENCL: 01
SUB CODE: PH NO REF SOV-. 000 GTHM: 003
,Qard -

ACCESSXON NR: AP4029844 8/0279/64/000/002/0177/0179
AUTHOR: Kovtun?_A!__Kt.,j(Xhar'kov); Krugly*kh, A. A. (Khar1kov); Pavlov, V. s.
(Xhar'kov)
TITLE: Vapor Pressure of solid beryllium
SOURCE: AN SSSR Izv. Metallurglya L gornoye delo, no. 2, 1964, 177-179
TOPIC TAGS., vapor pressure, beryllium, evaporation, Langmuir method, Knudsen method,
~sublimation
,ABSTRACT: Since the purity and technology of beryllium have been impraved, it has
:become necessary to know the temperature dependence of vapor pressure for the purest
types. The authors have determined the vapor pressure of beryllium the over-all
purity of which considered non-uetallic impurities at not less than 99.95%. The
Jet Si, Al, Cr, and Ni impurities did not exceed 0.001% for each component. The
~calculation for the,vapor pressure was conducted by the following formula (using
,Knudsen's method)
P
K
!Card 1/2

iACCESSION NR:
i P -2i[RT (2)
lin Langmuir's method av M
where P is the vapor pressure, G is the vaporization rate; X is Clauzing's coefficient.
a is the vaporization coefficient. Orig. art. has: 3 figures and I table.
'ASSOCIATION: none
;SUB14ITTED: 13Jul63 DATE ACQ: 30Apr64 ENCL: 00
:SUB CODEs ML NO REF'SOVi 000 OTHER: 003
Card 2/2

ig
nL
ivmr n n
WE UTHQ
Rs
, VI.M4
-op R
MI-
qg-
xvi . . . . . . .
f, IRM
al
-00,
e.sp

-, 6.f
11 Sol,, 5-,, A A Afol-NA.)... k
-. -, ; Ir
tr -Ac' A 64VAW-m-

,1~ I
F~ - - .- -1 U ,

74MA .6 1 Awi (A I A
~ RWT m
-"a JD
IJP

L 40023-66 EWT (m)/DJP(t _.~ /EETI LIP(c) JDIjG.
ACC NR, AP6019827 SOURCE CODE: UR/0370/66/000/001/0071/0072
AUTHOR: Kovtun, G. P. (Kharkov); Kruglykh, A. D. (Khaikov); Dyakov, 1. G. (Kharkov)
ORG: none
'VI
of mol
bdenum
TITLE: Zone refinin
g
y
SOURCEI AN SSSR. Izvestlya. Metallyq no. 1, 1966, 71-72
TOPIC TAGSt metal zone refining, molybdenum
ABSTRACTI The effect of certain parameters of zone recrystallization (speed of
travel of the liquid zone, number of posses) on the degree of refining of molybdenum
was studied. The metal purity was determined by measuring the ratio of the electrica
resistance at room temperature to that at the temperature of liquid helium, F -
R295oK/R420K. The zone refining was done with a special electron-beam gun whose
design Is described. It was noted that the refining of molybdenum Is due mainly to
the vaporization of volatile Impurities, and also to the mechanism of zone refining
itself. The character of the distribution of impurities over the length of the spec-
ffi-
o
ti
t
h
di
t
ib
i
I
di
l
b
I
iti
h
l
i
u
on c
e
men
es t
n
ca
at mo
denum conta
es w
t
a
s
r
ns many
mpur
y
cient X 41, such as carbon. A change in the speed of travel of the liquid zone from
I to 5 mm/min does not appreciably affect the distribution of Impurities along the
specimen. Orig. art. has: 2 figures and I table.
SUB COM IV SUEM DATE: 07Jan65/ ORIG REFt 001/ OTH REF1 002
Card 1/1 UDC% 669.284

S/07Y6 2/03 2/001/004/016
D213 D302
AUTHORS- Pyatnovaq Yu.& Kovtun I..kq -'eshakov, M,G,,g Kray-
0 1 Y _p P1
evskiy, A.A.9 Sar;ic~Fe~~a, I.K., and Preobrazhenskiy,
N,A.
TITLE: Studies in the synthesis of poly-yne compounds
PERIODICAL: Zhurnal obshchey khimii, v. 32, no. 1, 1962~ 138-139
TEXTg Methods of pre-Daring decadi-yne-1949 and tetradecatriyne-.2,5
8-ol--l are described. The above compounds are intermediates in the
synthesis of arachidonic and other unsaturated acids~ (1) Chlorobu-
tyne-2-ol.-ls Butyne-2-diol 1,4 was treated in ~-ridine and benzene
(00) mixture) at 3-500 with excess SOC12 (1.i~e7quiv.) with tempe-
rature being kept at 15-200C. The yield was 60 %. (2) Octy-ne-.2-ol-1:
Prepared in 59 ~& yield from 1 chlorobutyne-2-01-A.9 wi-th -~-,butyl ma-11--l",
gnesium bromide, the former being added over 90 mins. Th- fraction
of b.p. 98--1000C/16 mm was collected. (3) 1-Bromo-octy-ne-2: To oc-
tyne-2-ol-1 in dry ether kept at 0 - 20C9 PBr3 1n slight excess and
catalytic amounts of pyridine were added over 11, mina,, The yield
Card 1/2

S/079/62/032/001/004/016
Studies in the synthesis of ... D213/D302
was 60 %- (4) Decadiyne-.1,4s 1 Brompoetyne-2 was reacted with Na
acetylenide. The yield was 48 %. (5) Te trade catriyne-2, 5 9 8-- 01-- f : To
a solution of excess etbyl magnesium bromide in dry ether with cool-
ing to -3-500 propargyl alcohol in benzene was added over 90 mins,'
There are 7 references: 3 Soviet-bloc and 4 non-Soviet-bloc. The
references to the English-language publications read as followsle '11~
W.J. Bailey and E~ Fujiwaraq J. Am. Chem. Soc., 77, 165, 1955; W.J.-
Genslerg A.P. Mahadevan and J. Casellag J. Am. Chem. Soc,,~ 78p 639
19564 J.M. Osbond and J.C. Wickeneg Chem. a,, Ind., 1959, 1288.
ASSOCIATION: Moskovskoy Institut tonkoy khimicheskoy tekhnologii
imeni M.V. Lomonosova(Moscow Institute of Fine Chemi-
cal Technology imeni bl.V. Lomonasov)
SUBMITTEDq January 25v 1961
Card 2/2

ZAPESOCHNAYA, G.G.; KOVTUN, I.A.; SARYCHEVA, I.K.j- FROBRA2HENSKIYY N.A*
Synthesis of 1,12-dodeoanolide. Zhur.ob.khim. 33 no.7:2133-2136
il 163. (MIRA 16-8)
1. Moskovskiy institut tonkoy khimicheakoy takhnologii imeni.
Lomonosova.
(Dodecanil-ide)

KOVTUN, I.G. [Kovtun, I.H.1p kand.ekonom.nauk; KARPENKO, S.O., inzh.
Determining the economic offectiveneas of new machinery. Mekh.
sill.hosp. 12 no.8:19-21 Ag 161. (MIRA 14:7)
(Agricultural machinery)

KOVTUIJ IT.G.LKovtun, I.H.], kand, akonom. n-axi1q, CILAYKOVSKIY, A.F.
[Chaikovs*iq A.F.), otv. za Nrypusk; YXITKA, S.F,., tekbn.
red.
[Methodology for deternining the economic efficiency of new
machinery in agriculturelMetodyka vyznachenila ekonomichnoi
efektyvnosti novoi tekbniRy v sillslkoru hospodarstvi. Kyiv,
Vyd-vo Ukrainstkoi Akad. sills1kohospodarstIcykh nauk, 1961.
40 P. (MIRA 15;7)
1. Kiev. Ukrainslka Akademiia sillslkohospodars'41-.h nauk.
Ukrainslkyi naukovo-doslidnyi irstytut ikoDorillol i organiza-
tsii, sills1koho hospodar-stva. 2. Chlen-korrespondent Ukrain-
skoy akadekii sellskokhozyaystvennykh nauk (for Chaykovskiy).
(Agricultural maeldnery)

KOVTUN, I.I.
Apparatus for distilling essential oils. Patent U.S.S.R. 77X6, Dec.3i,
1949.
(CA 4? no.19:10181 153)

S/021/62 000/002/004/010
D299/D304
AUTHOR: Kovtun, I. I.
TITLE; On a boundary-value problem for a linear system 0,
second-order differential equations
PERIODICAL: Akademiya nauk UkrRSR. Dopovidi. no. 2, 1962, 1157-160
TEXT: The asymptotic method developed by S. P. Feshchenko (Ref,
Doktorsk. diss. (Doctor's Thesis), K., 1950), permits finding the
eigenvalues of the system of linear differential equations;
A d~v + 6 C (T; F_) .11 + B (T-, E~) y0 W
dt 2 dt
where y is an n-dimensional vector and A, B and C are matrices of
n-th order, with boundary conditions
Card 1/ 6

On a boundary-.value ...
33750
S/021/62/000/002/004/010
D299/D304
I I
a1Y (1) + bly (0) + a0YM + b0Y(O) = 0
cly1(1) + dly9(0) + C0YM + d0Y(0) = 0 (2)
where a,b,c,d are constant matrices, Y is the fundamental matrix
n = -
of the solutions of system (1) Lt, 607, ( kbeing the ei-
geniralues). Boundary conditions (2) are a generalization of the re...
gular conditions for a second-order differential equation. Three
cases are considered (with respect to the values of a,b,c, d). Con.-
ditions (2) are equivalent to
Y(O) = 09 Y(1) = 0 (6)
A particular solution to Eq. (1) is soughL in the form
Card 21 6

Un a boundary-value ...
33750
S/021/62/000/002/004/010
D299/D304
_n + n k (_r~ E (k = 1,2,,n)
Yk('~l = [luk( k
where ~k is determined from
d9k '
+ jQk(_
&_~
LDk
dl k (k = 1,29 ... n)
It is assumed that the vector nk and the scalar functions Dk and
g1k can be expanded in series. The vectors Juk are determined from a
system of algebraic equations. The obtained expressions make it
possible to find the particular solution by successive approxima-
tions. The general solution of Eq. (1) is
Card 3/6

On a boundary-value ...
33750
S/021/62/000/002/004/010
D299/D304
Y ~ 0( Y +
1 1 CY2 ~14)
where Y1 is the fundamental matrix of the solutions for positive
dik Dk.
, and Y2 for negative j Substituting solution (14) in the
boundary conditions (2), one obtains a system of algebraic equa-
tions for the constantso(. The determinant of this system, being
equal. to zero, yields a transcendental system of equations for
IF 2n.
Thus one obtains Por the boundary conditions (6)., one
obtains
sin (3 0, 3 - c~ = Irk, k = 1, 2
Card 4/6

33750
S/021/62/000/002/004/010
On a boundary-value D299/D304
d77' (17)
0
Hence one obtains the zeroth approximation for
-ff k 2n
v 1
F_~~ -d'r
v
~O (v = 1,2,...,n)
The other approximations can be readily obtained. Two examples are
considered. There are 3 Soviet-bloc references.
Card 5/6

On a boundary-value ...
33750
S/02 62/000/002/004/010
D299y,)304
ASSOCIATIONg Instytut matematyky AN UkrRSR (Institute of Mathema-
tics of the AS UkrRSR)
PRESENTED:
SUBMITTED:
by Academician Y. Z. Shtokalo of the AS UkrRSR
June 21, 1961
Card 6/6

/6-
Kovtun, I.I.
. 37903
S/021/62/000/005/005/009
D407/D301
T7TT, Dc4-er;aini- eivenvalues of boundary-value problem for
u ___~ -L. -
ourth-order dil'_-Pevential ecu---Vior.
PEHIODIC~',_T, Alcaderaiya nauk U-!-.rRSR,. Dopovidi, no. 5, 19062, 581-580"
;-n- asy.-,-pzo'-Jc method is pro-oosed 'or determinin- 'he e-*Genva
iues of tha Droblem F(u) = ).G(u)
u (U) = 0, (2)
4
where F(u) d u + d [a(z) + b(z)u
dz4 dz d,_1
(3)
[d
4u + C(Z)ul
dz2
Ca--d 1/3

S/021/62/000/005/05/009
Determining eigenvalues of D407/D301
C~
with corresponding boundary
blem (1)(2) were considered
Schrift, 40"t 0131, 1940). By
equivalent system of type
d X.
dt
conditions (4). The
by E. Kanke (ReIE'. 1
a substitution, 'E'a.
(T) + EAJ(.Tf E))Xf
eigenvalues for pro-
:,aUhemat-ische Zeit-
(3) passes into a
(6)
where -E-t = z, E = 1/'V/'-'.; A0and A1are =atrices. The asymptotic
solution of equation (3) is sought in the form
('7
x = U
1 ('C' 1 + U2(Tf
w.n-e2e U and U are matrices and C1. are zwo-aimensional vectors.
1 2 1 ~' 2
T.h.c;oe vectors are dcterrained from a system of two differential ecua:.-
The constants, entering these equations, are ~,etermined from
boundary conditions. Four particular cases of bou-ndary condi-
.-ons are considered. 1 ) cos,a j=/ 0, cos 0; in this case one ob-
tains the asymptotic formula
Al =0122 2_1 t,
, a + ]. t
Card 2/3 n n /T 7 T 2T 3 a(T)dT.

Determining ei-envalues of ...
--/02Y'2/0G-/CO5/3'5/GG9
S
~ A D
31101
Analo-ous ~s-,-:Mtotic formulas are obtained for the other boundary
c o r-'; io r. s(Jcos oc J 0, cos 0; cos a = 0, cos 0; cos a = 0,
Cos
% Q
.M~SOCIATIU: ins'uy'uu't' materi-atylcy AN URSR (inst-itute of Yathematics
of the AS UlkxTSR)
PRES 7-7 1. , T IL D :
S U 3'.'Z" T' D :
by Academician Y.Z. Shtoi%-alo of the AS ITkrRSR
Se-otember 20, 1961
Card 3/3

,~i7 5 28
S/041/62/014/002/005/008
B112/B108
AUTHOR: Kovtun, 1. 1.
TITLZ: The question of the asymptotic solution of a linear operator
differential equation
PERIODICAL: Ukrainskiy matematicheskiy zhurnal, v. 14, no. 2, 1962,
205-211
TEXT- The equation dx/dt - Ax + F-F(t)x is formally solved by
X UVe iRt + Y(t)]~, where ~ is a formal solution of an equation
r
d~~dt[ The operator U transforms the operator A into an operator
Al a U AU of a certain normal form. The operator V transforms another
normal oDerator 3 into an operator of diagonal form. Asymptotic solutions
Xm are obtained by expansions
Co k a
(b - 7 - The error X - X 11 is estimated.
k-o k 11 m I
SUITITTED: January 6, 1962, Kiyev
Car,a 1 /1

KOVTUN$ I.I. (Kiyev)
Asymptotic solution to a certain linear operator differential
equation. Ukr.mat.zhur. 14 no.2:205-211 162. (MUIA 15-11)
(Differential equationa, Linear)

KOVTLJN, I.I.
Some aapects of the asymptotAc solution of an operator differen-
tial equation. Pribl. matod. ra,6h. diff. urav. no.1333--39 163
(MIRA 18s2)

Ukr E

K&V T-
110-10-9/18
AUTHOR: Didorenko, I.A., Engineer and Kovtun, 10M9, Candidate of
Technical Sciences.
TITLE: Extension of the Sparkless Zone of Commutation of d.c.
Machines. (Rasehireniye bezyskrovoy zony komm-utatsii
elektricheskikh mashin patoyannogo toka)
PERIODICAL: Vestnik Elektropromyshlennosti, 1957, Vol.28 No.10,
pp. 47 - 48 ~USSR)
ABSTRACT: In machines operating under sudden changes of load,
problems of commutation are not yet resolved either in theory
or in practice. The problem is becoming particularly important
in view of plans for widespread electrification of the rail-
ways. Commutation is bad when the load changes suddenly bec-
ause there is no compensation of the reactive e.m.f. of the
inter-poles. Sparkless operation of a machine may be ebarac-
terised by the area of the zone of sparkless commutation,
which it is therefore very desirable to extend. The wticle
describes verification of a new method of improving commutation
by including semi-conductor rectifiers between parallel
sections of a brush. In this waY, it is possible to extend
the sparkless zone by a factor of 1.5 - 26 The article gives
the results of tests made on four machines of different size
Uard 1/3 and in all cases the test results were in quantitative agreement.

110-10-9/18
Extension of the Sparkless Zone of (;ommutation of d.c. Machines.
curves taken without a rectifier are given in Fig. 11 whilst
Figs. 2 and 3 show curves using a rectifier on a d.c. machine
of 3 kW and 110 V manufactured in the Volta factory. When test-
ing the machines without a rectifier the additional brush was
connected to the main one so that the total brush width was the
same in both cases. The machine was tested as aepnerator with
shunt field atmted speed. It is concluded that the improvement
of commutation by means of semi-conductors is worth attention.
The methods should be most effective in a.c. commutator machines
where, because of the presence of a transformer e.m.f. in* the
commutating sections, the uncompensated e.m.f. is greater and
current rectification should improve matters appreciably. The
magnitude of the uncompensated a.m.f. is relatively small and
the rectified properties of selenium rectiterB are not so good
at low voltages. Therefore, a still greater effect is to be
expected if use is made of rectifiers that operate well at low
voltage. This method of improving the commutation is easy to
carry out particularly if use is made of small-sized germanium
rectifiers which can easily be built into the machine or direc-
tly into a cut in the brush.
uard 2/3 There are 3 figures.

110-10-9/18
Extension of the Sparkless Zone of Commutation of d.c. Machines.
ASSOCIATION: The Voroshilovgrad Evening Engineering Institute
(Voroshilovgrad,sKy Vecherniy Mashinostroitelnyy
Institut)
The KhaA;v Polytechnical Institute (Kha.Aovskiy
Politekhnicheskiy Institut)
SUBMITTED: June 29, 1957.
AVAILABLE: Library of Congress
Card 3/3

SIMIRENKO, Lev Platonovich [deceased]; SHEPELISKIY, A.I.s kand, sell-
khoz. naukp glav. red.; kand. rellkhoz. nauk..
zam. glav. red.; POSTYUK, AN., zamo glav, red.; RODIONOV, A.P.)
doktor biol. nauk, zam. glav. red.; DEMIYMIETS, Ye.F., starshiy
nauchnyy sotr;, red. toma,- LISOVENKO, L.T., kand. biol. nauk..
hauchryy sotr., red. toma; NIKONENKO, M.N., kand. biol. nauk,,
rod. tomit; POSTUYUK, A.V., red.; DERMANKO, G.S., tekhn. red.
(Pomoloa in three volumes; applep pear, stone fruits] Pomologiia
v trokh tow~aklq iablonia.. grusha, kostochkovye porok,. Kiev,
Izd-,ro Ukrainskoi Akad. sellkhoz. nauk. Vol.l. [Apple] IAblonia.
1961. 578 p. (MIRA 15:2)
1. Ukrainskiy nauchno-issledovatellskiy institut sadovodstva
(for Demlyanets, Lisovenko).
(Apple-Varieties)

2. U33R (600)
4. Slag cement
7. Activated and plaeticized concrete froir blast furn,.ce slags.
steoi. prom. 310 no. 4, 1952
Kand.Tekhn. 7.auk Yuzhnii
9. Monthly List of Russian Accessions, Library of Conf~ress, Au,,rust 1952.
UNCLASSIFIED

KOVTUN, I.P. , kandidat takhnicheakikh nauk; IVANOV, O.M., kandidat takhni-
ariesluLkh nauk; nauchnyy redaktor-, RWTVTSEVA, M.P., redaktor;
SMOVYAKOVA, II-V., tekhnirhaskiy rodaktor
[Activated and plasticized concrete on a base of blast furnace slags3
Aktiviiovanr7i i plastifitairovannyi beton na baze domennykh shlakov.
Hoskyat Goo. Izd-vo lit-x7 po stroitel'stvu i arkhitekture, 1954.
37 P. (MIRA 8:4)
(Concrete) (Slag cement)

-,,_TQV ,.-I.P-,k&nd.tekhn.nauk; RTABTSVA, Yu.V., iuzh.; DENISENM, Z.Ya.
Wall materials made of activated coke slags. Sbor. trud. IUZHUII
no.2:108-111 1599- (MIU 13:9)
1. Yuzhnyy nauchno-issledoVatellskiy institut po stroitelletvu.
(Idghtweight concrete)

KOVTUIT, I.P., kand.tekhn.nauk; RYABTSEVA. YU.V., inzh.; DEITISETKO, Z.'Ta.
Roofing tiles made of activated coke slags. Sbor. trud. IUZHNII
no.2:136-138 '59. (MIRA 13:9)
1. Yuzlinyy nauchno-isaledovatelisk-iy institut po stroitel'stvu.
(Tiles, Roofing) (Slag)

KOVTUN, I.P., kand.tekhn.nauk; TARABOKO, V.11., kand.tekhn.nauk;
______'RT&TSHVA. Tu.V., mladshly nauchrqy sotrudnik; ISNISK71:5,
Z.Ya., master-instruktor
Activated air-entrained elag concrete. Stroi.mat. 5 n0-9:35
s '59. (MIRA 12:12)
(Lightweight concrete)

-KOVT,UN,-Iyan_.Petrovich;LATASH, M.Ya., red.; SLINIKO, B.I., red.;
LEUSHCHENKO, N.L., tekhn. red.
[Activated mortars, coneretes,and products made of blast-
furnace slags]Aktivizirovannyo rastvqry, betony i izdeliia iz
domennykh saakov. Pod red. M.IA.Latasha. Kiev, Gosstroiiz-
dat, USSR, 1962. 134 p. (MIRA 16:2)
(Slag) (Concrete) (concrete reWoreement)

DYADECHKO, N.P.; ZHIGAYEVI G.N.; KOVTUN, I.V.
Eliminating perennial foci of the Colorado beetle. Zashch. rast.
ot vred. i bol. 8 no.9147 S 163. (MIRA 16:1o)
1. Ukrainskiy nauchno-issledovatellskiy institut zashchity
rasteniy, Kiyev.

DYADECHKOI N.P., kand.biolog.nauk; KOVTUN, I.V., mladshiy nauchnyy sotrudnik
...
Controlling the Colorado beetle in self-sown potato fields.
Zashch. rast. ot vred. i bol. 8 no-5:49 MY 163. (MIRA 160)
1. Ukrainskiy nauchno-issledovatellskiy institut zashchity rasteniy,
Kiyev.
(Ukraine-Potato beetle-Extermination)

KOVTUN, I.V., mladshiy nauchnyy sotrudnik
Harmfulnens of the Colorado beetle. Zashch. rait. ot vred. i bol,
9 no.3:47-48 164. (M-IRA 17:4)
1. Ukrainskiy nauchno-issledovatel'skiy institut zashchity rasteniy.

VARTAPETOV, R.A., professor; KOVTUN, I.Z.; PUSTOVOYT, L.S.
Treating trichomonad colpitis vith a product made from ramson.
Akusb. I gixi. no.4:69-71 JI-Ag '55 OILRA 8: 11)
1. Iz kafedr7 akusherstva i ginekologii (zav.prof. R.A.Vartapetov)
Vinnitskogo meditainskogo inatituta.
(VAGINA, DIS.
trichomoniasis, ther.)
(THRICHOMONIASIS,
vagina. ther.)

TISHCHENKO, Yu,, inzhs,;,KOVTUN, K., inzh.
Combined drying and firing In annular kilnB. Stroi.mat. 3 n0.11:
24-25 N '57. (MIRA 10:12)
(Brickmaking) (Kilns)

KOV.T-V.N,-Xet-LTUBZNKO, I.
-
Improve organization work. Den.i kred. 17 no.9:48-49
S '59. (MIRA 12:12)
(Cherkassy Province-Banks and banking)

KOVMN) K.Al.-(Loningrad, Kirlllovakaya ul., d.14, kv. 16)
Intraosseous azygography in cirrhosis of the liver with mani-
festations of portal hypertension. Vest. khir. 89 no.10:37-39
o 162. (MIRA 17:10)
.. Iz fakul'tetskoy khirurgicheskoy kliniki (zav. - prof. P.N.,
1
Napalkov) Laningradskogo sanitarno-gigiyenicheskogo meditsins-
kogo instituta.

KOVTUNj L., starshly Inah. po tekhnike bezopasnosti; SECRENOV, A.
Readers' conference by correspondence. Okhr.truda i sots.strakh.
5 no.031 AP .162. 1 . (MIRA 15:4)
1. Ustl-Izhorskiy fanernyy zavod, TAna, stantsiya Pontonnays. (for
Kov-tun). 2. Predsedatell komisaii okhrany truda stroitellno-mcn-
tazhnogo lipravleniya No.9, g, Yevpatoriya (for Sechenov).
(Industrial hygiene-Periodicals)

KOVTUN, L.F.. inzh.
Concernihg,S.A. Komarov's article "Mathods for calculating
t~* sag curves of overhead power transmission lines." Elek.
sta. 33 no.5:92-93 My 162. (MIRA 15--7)
(Electric lines--Onrhead)
(Komarov, S.A.)

'i Qi I "I? 19 1; . V ~! r,- h .
. p ..;
-------
cf ~zpur 7L,.,'x-es arid Lurno; of 112-3 '10 pwer trans-
Itnoo. -Floko )6 nc),8~62..-,66 qg 165. (MIRA 1818)

KOVIIIII, L.P. ,
Determination
lines during a
35 no.6:54-59

VINOGRADOV, Ye.G.. kand.tekhn.nauk; KOVTUN, L,I.,, inzh.
Safety clamping Por ve ,jar peeling machings, D,27*.P-T,0=,
10 no.12t25-26 D 161. (MIRA 14,212)
. (Woodworking machinery-Zefaty appliances)

RUDERKO, N-P.; KOVTUN, L.V.
I- . , - I - I- I .
Compounds of germanium with 8-hydrayyquinoline. Trudy Kom*
wialoMi,im, 14:209-217 163. (MMA 16:11)

KOVTUN M. G.
bal. 9
lass ex-,A!nsive 'lim ij,-;r,,ying. 7anh,:;b. ra,-t. ot v-,edo I
no.(.-&10 164 1:7."7)
1

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on I ? got$ to at
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00
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so
41atOrk 6" "4wourth ammeltim. Xj. s. KOvtuj,.
-
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d
h
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00
d-
s
aye
. S. (hof
-
dttil. of Ft--
- ~
and Fe
by diffem.. it. titmtln with KXV,(h in -00
00 the vrtwnm of f%NII as indimtor by the xtwp mcth~j
(cf. C. A. 23, WD. with &M without sub%titution .,1,
" -00
NOW% Im Ref
(4. cave mixt amitate r,,%t,j(j than th.4t
00
00 with KUn(h hir the Zintummann - Rvinhar tit itwtiu,.j
'W. asp and Om are (kvmpd. with I(C1 of 11,10"
and InqW. ofts with )IF and IICI tw 110)
in CCh
t
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In-901. material are pugrilered undrr On. a1c. C. It. 1,00

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t.411.40.1ftl Illa Vessel "111,11 tit list likeamil
11,4 litkitt 44 Ilif W1,1118 the JIF011111-1. OW
9 wood "nbu,ititatra Lire almacbmi atilt in subsequent com.
bijoitatis a I"Ords of themiraml gas was used to diL the
gases. rhe tA%t combustion was carriett (mat Ltf;rr 411 the
11twed gas wit's useii till And ~.rvir,l As a cont"d of thr
In C in h)w.c P,
Alilly1m, this C WAS 111fit WI.I. 1911111 ill(' AfV4jCf IMIt Of III! 11V
di4solvitic lite Fein KrCuCl.,aijIn. 'flit Instal. midtir wA,
driml atid cakilied at IILVJ', In high-C sAmOci it ii
tlrvr~*Aary to lift. the resi'lod C. 11. .1. Kallilds
190
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I L
-COVInMT, 11. C. I OGOROJVAYA, A. D.
27125
Kontroll martenduskikh shlakur po znachenlyu rn vodnoy suspemii. Z,-vor-lsk-,qya latoratorlya,
1949, No 8, S. 991--96
SO: ITO. Vt

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oo
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0 VW~m d 09 jqgll~~ M. K. Kovsun end A. D.
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of A=964-M). flu Russian]. A nw4htxi for 'h"'r`;.pid
m of Out b"Way of open-bra
in which the pH of an aqwm mmilenelm of 2W-3W mg.
of the slog was Comparm With th" of a buffer solution of
crushet] to fams tbnuWh a
i ="LZlLda` "-ftirloo ml. of =Y;rlkd
&A rebodled water. After &How* to mKth, the ro 0
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00 Vulut-1. with pH vsJum reswing from 7.8 to 12-98. A linear VO 0
relsekwal4p was fmW to exim betweem the basicity
%o
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a baskity drwmWA4ivn by thin met=111 min.- X. ~v 0
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Phase analysis of cast iron Ukr.khim.shur. 21 no.5:655-660 '55.
(KLRA 9:3)
1. Dnepropetrovokly metallurgichookiy institut imeni I.V. Stalina.
(Cast Iron--Analysis)

AUTHORS3 Lev, I.Ye.,,,Kovtlm, M.,S, SOII/163-58-1-53/53
* - - " . . - - tt'~" - -7
TITLE: The Characteriatio Properties of the Compound Phases of Malleable
Hard Cast Iron (K kharekteristike svoystv fazovykh sostaylyayush.-
chikh belogo chuguna)
PERIODICAL: Nauchnyye doklady v as hey shkoly. Metallurgiya, 1958, Nr 1,
pp 279 - 283 (USSR~
ABSTRACT.- The mechanism of the anodic processes of the fractional dissolu-
tion of ferrite or austanite, as well as the separation of ce-
mentite was discussed. It was suggested that the properties of
the composition of pheees of malleable hard cast iron should be
investigated by means of an electrochemical method. This method
makes.it possible to observe the change in the anodic potential
of ferrite and cementite in the hardened dies. The potential of
cementite was found by the compensation method, The cementite
simple was immersed in the electrolyte and acted as an anode, A
-platinum spiral served as the cathode,
It was found that the potential difference between ferrite and
cementite in relation to the composition of the electrolyte
amounts to about 150 mV in a normal solution of FeSO 4, about
Card 1/2 100 mV in a normal solution of HC1, and 50-60 mV in a normal

The Characteristic Properties of the Compound Phases SOY/!63-58-'-53/57/
of Malleable Hard Caat Iron
solution of KC1.
The determination of the electrochemical potentials of the com-
pound phases of malleable hard cast iron shows that the most
suitable electrolyte for carbide analysis of malleable hard cast
iron is the 0,3 HCI-solution,
By determining the potentials of eyery phase the proper electro-
lytes may be found for the phase analysis of diverse cast irons,
There are 3 figures and 4 references, 3 of which are Soviet.,
ASSOCIATION: Dnepropetrovskiy metallurgicheski-y institut (Dnepropetrovsk
Metallurgical Institute)
SUBMITTED: October 1, 1957
Card 2/2
USGOY2.1-Dc-6o-786

I
,80)
AUTHORS.- Lev, I. Ye., Ko-7tun, M. S.
soll/1,63-58-4-45/47
TITLE: Differenziaj. Carbide Analysis of White Pig-Iron
(Differentsiallnyy karbidnyy ana 14 z belogo chuguna)
PERIODICAL: Nauchnyye doklady vysshey shkoly. Metallurgiya, 1958,
e
Nr 4t pp 255-257 (USSR)
ABSTRACT: ILI is possible to obtain a pig-iron in which the carbide phase
consists only of a eutectic cementite, or of a eutectic and
secondary cementite, and in which, after slow cooling, the
_,emezitlite is alsi present. The method of a differential
carb-ide process is given here. Small plates measuring 8 by 30
by 60 mm wers used. Each plate was cut into three equal parts.
The first part served for precipitating all three kinds of
cemen"ite. This part was subjecte-- to cam-bide analysis in its
originall state. From the second part, the secondary and the
eute,tic cementites were precipitated. This part was heated
quickly up to 7500 and quenched In a 10~. NaOH solution. The
th-lrd 13art was lised for pro-ipitating the eutectic cementite,
and. quenched at, 1~000 for this purpose. The carbides were
Card 1/2 pre.-'pitated in these specimens according to the method worked

DIfferential Carl; 4de Aralysis of White Pig-Iron Soll/163-58-4-45/47
,~Ut before (Ref 3). The data obtained were compared with the
cale.-a".Lated carbide quantities. Calculation was carried out
a o rd L
Ung to the 'ever pr`ncivle (Ref 6). The method of
f f e r ei 'I i a Icarbide analy-els worked out here was tested with
white p-g-iror. specimens a3loyed with chrome, nickel, silicon
and The data Qbta:*-.ned are given. This method permits
detenP_-1'.nati.:,n of the composition of eutectic, secondary and
3t-mentite 4n the subeutectic white pig-iro)'.I.
ThE~re ar,~: 2 ~.-abieq and 7 refer-ances, 6 of which are Soviet.
ASSOCIATION: D-.~~---pr,petrovokfly met
-a"1_-1L-,rgi,_,heskiy Jnstitut
I
f111n9p-....jpetrc1.rsk I!jSt4tUt& of Metallurgy)
SUBMITTED. Nov,-~xber 4. 1, 9 1, 7
C it rd 2 /2,

KOVTUN, M.S.
I--------------
Thermofractionation method of determining nitrides in steel. Trudy
kom.anal.khim. 10:2o5-214 16o. (NIBA 13:8)
1. Dnepropetrovskiy metallurgichookiy inetituto Dnepropetrovsk.
(Ritrides) (Steel-Lualysis)

S/0321/62/028/00 3/002/'0,
B 1 27/B I 10
AUTHORS: Lev, I. Ye., and Kovtun, M. S.
TITLE: Determination of small cerium quantities in cast iron and
steels
PERIODICAL: Zavodskaya laboratoriya, v. 2F, no. 3, -,,)62, 27-f-2 74
1
TEXT: A rapid method of determining Ce in carbon-containing iron alloy's
1s described. Ce is precipitated as oxalate at pH 5,5-7,0 with lant.'Ianum
oxa 'i-ate as collector. Ce is coprecipitated 'with La in acid medium e-ier.
with larEe excess of Fe, Al, or Mn. 1.0 g of steel or cast iron is
dissolved in 110 ml HC1 (1 :3)~ The carbides are destroyed by dropp:.ng in
HIT"10, (1 40), and then 4 ml of 10 mg/ml La(110 ) solution -s a,4~ded ':n the
3 3
case of cast iron, Eraphite and SiO are filtered off, 100 M1 of sal:urate,
2
oxalic acid is added, the solution is heated and neut-ralized -x1zh
ITH 40H (1 :3) until turbidity sets in. After settling for 11 hr. the
precipitation is filtered, dissolved in 5 ml of 1.0 M' H 2SOJ? afl,,:-r addi'il-lr
Card 1/2

S/Oj2/62/028/003/002/017
Determination of small cerium... B127/13110
of one drop H 202evaporated until SO 3 vapors appear, ', ml ff20 add-i,
filtered. 25 ml of 20 K4P207' 3 H20 solution an,i then 2 mil -,t' 0.01 1%
KMnO,, adrIed, filled tip to 50 ml, and the intensity ot' oo'.0r,Irk,- MP-i.~)Ured
after 3 mill with a W-M (FEK-M) colorimeter and a green light fil-er~
The Ce content is determined with the aid of a calibration curve. There
are i table and 8 references: 6 Soviet and 2 non-Soviet. The t,aG
references to English-language publications read as follows~
',V Y,~est;llood, A. Mayer. Analyst, 73 (1948); Tf 4.1arplej E, P_r,zYb3,.c"V_cz,
D Hume, An,,l Chem, , 26; 12 (1956).
ASSOCIATION: Dnepropetrovskiy metallurgicheskiy institut (Dr.-~-ropetrovsk
Metallurgical Institute)
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K011TUH, M.S.; KADINOV, Ye.l.
Methods of determining chromous oxide in slags during the electric
smelting of stainless steel. Nauch. trudy IVI no,51:97-100 163.
(MIRA l7ijO)

S/032/63/029/001/008/022
B104/B186
AUTHORS: Kovtun, M. S., and Kadinov, Ye. I.
TITLE: Determination of chromium oxide in slags of electric
stainless steel melts
PERIODICAL: Zavodskaya laboratotiyag v. 29, no. 19 19639 35
TEXT: The metho -d-is based on the dissolving a slag sample in a mixti~~e
of ferrous chloride, hydrochlori-c-acid and hydrofluoric acid. In this.
process the ferrous chloride oxidizes the bivalent chromium and changes
it to chromium c4loride, which together with ferrous oxide can be
titrated-with potassium dichromate. From.the content of ferrous oxide
in the slag the content of chromium oxid& can be calculated. O-2r- - 0-59
slag are dissolved in a 100 ml flask by 20 ml of a mixture which is
prepared from 25 ml saturated ferrous oxide solution, 20 ml HF and 50 ml HC1
(1.19) in a carbon dioxide stream. The solution is put into a 250 Ml
I'lask containing.50. ml cold water and 20 ml H 2so4 (1 -. 1) titrated with a
0.1 N solution of potassium dichromate in the presence of phenyl
anthranilic acid and then the sum of the chromium and feirous oxide content
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S/032/63/029/001/008/022
Determination of chromium oxide in ... B104/B166
is calculated. To determine the ferrous oxide 0.2 g slag are dissolved
in a platinum bowl by heating it in a mixture of 10 ml HCI (1-19), 5 ml HF
and 10 ml H2so4 (1:1) until SO3 vapors separate. The salts are dissolved;
in 50 ml hot wator. 20 ml of a 20% persulfuric acid solution are added,
boiled 10 min and the iron is precipitated with ammonia. The ferrous
hydroxide precipitate is filtered off, washed with water until a negative. I
chromate-iron reaction with diphenylamin occurs, then,dissolved in HCI
.0:5), heated to 500C. The solution is put into a 100 ml measuring flask-
to produce a sulfuric acid medium (5 ml H so (1-64) added to 100 ml
2 4
water). To 2-5 ml of the solution'sampled from the measuring flask, 5 MI
30/6 sulfosalicylic acid and concentrated 6mmonia are added until the
yellow coloring becomes stablet Water is added up to the-filling mark,
-the sample is stirred and colorimetered with an (FEK-M) devic'e
provided with a b-lue filter. The chromium content in the slag is calculated
from the difference,.
4.
ASSOCIATION: Dnepropetrovskiy metallurgichaskiy institut
(Dnepropetrovsk Inatitute of Metallurgy)
Card 2/2