SCIENTIFIC ABSTRACT DVORACEK, EMIL, INZ. - DVORAK, B.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000411620016-0
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 25, 2000
• Sequence Number: 16
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

DVORACEKp E.
"Measuring impurities on insulators of open-air electric installations."
Energetika. Praha, Czechoslovakia. Vol. 8,.no. 12, Dec. 1958.
Monthly liet of East European Accessions (EEAI), LC, Vol. 8~ No. 6, Jun 59j, Uncles

DVORACEK, E.
"Draft of the Czechoslovak standard for testing equipment of high and very
high alternating voltage."
ENEROETIKAj Praha$ Czechoslovakia$ Vol. noo March 19cfn
5,7
Monthly List of East European Accessions Index (FEAI), Library of Congress,,
Vol. 8. no. S. August 1959
Unclassified

DVO.RACEK9 E.
Analysis of a breWcdown caused by soiled insulators on a 110 kv.
power Une. P. 415.
ENEMn=A, Praha, Czechoslovakia, Vol* 9., no* 8, Aug. 1959
Monthly list of East European Accessions (EEAI) LC, Vol. 80 No* 10
oat. 1959.
Uncl.

DVORACEK, fbilp inz*
Safe distance in repairing the high-tension and very high-tension
overhead lines without interaption of operation. Energetika Cz 6
no-9:42-403 8 156o

-F?R~Ca, 3.
Research an clinatio conditions affecting the construction and operation
. of outdoor-Idgh-voltage lines, Emrgetika Cznno.10:529 0 161.

DVCUCEK, Wl, ins.
Testing of cap insulators by inmdation testers. Energetika Cz
13 no.2:83 F 163.
1. Vyzkumny ustav energeticky, Brno.

DVCHAG&K3, Eadlp inff,.
Maintenance of high-voltap -andextra-voltage insulators in
contaminated- environwnt. Fj*rgetiIa Cs 13 no.6:293-296 -To 163.
le Vyzkumy u5tay onargetickyj, Brno.

DVORACEKO E.s inz.; WALIAp Jol ULICNYP F.
---------------------
Data for calculation of insulators in polluted surroundings.
Energetika Cz 14 no.8i375-378 Ag 164
1, Research Institute of Power Engineering, Brno.

-D,VORACF,Kq
Voltage characteristics of polluted inalilators. Fnergetika Cz 14
no.11:550-562 N t64.
1. Research Institute of Power Engineering, Brno.

ZALF.UX, Z.O.inz.; DVCRACEK, P.
Connection of,ph~wemters in low-tension.distributaft..
Enorgetika Cz 7*uP,.2:�5-95 F 1570

DVORACSX,, antink--
-:~. _DL
Hidden loos of electric power. Energetiks Cz 12 no.3:153-156
Mr 162.

DVCTL~=, FraxLl A
1 7
of the nsutml vir-A lc~--i ca-vnint. MaktrotAchnik 18
r10,6a.175-176 Ja t63,

DIITCIR~ICEK.9 Fn-~Aise-k
-.A. c~~rlr .i( -'~-
u~ze of 6tar-io-L~a 7 -
r10.4-11-18 Ap 164.

DVORACEK, Hubert, dr.
Optimum size of food factories and their location. Prum
potravin 15 no.4:153-154 Ap 164.
1. Ministry of Food Industry, Prague.

DVOF41CER) J.
Underlying econ=ic conditions of the general plan for a network of forest roads. p* 51e
NO. 11 1955
SBOR14ILK EkDA C: SPISY FANILTY LESNICKE
Brno, Czechoslovakia
A., Eastern European Accession Vol. 5 No. 4 April 1956

Z/034/61/000/010/001/002
E112/E553
AUTHORSt Horcic, Karel, Engineer and Dvoracek, Josef
TITLE% Some problems of aluminium production
PERIODICALa Hutnicke listy, 1961, No.10, pp-710-715
TEXT: Present aluminium production in Czechoslovakia does
not meet steadily increasing demands and projects for the
building of additional plant, with special reference to available
raw materials and their location, are discussed. The problem is
presented in three main sections: 1) Production of aluminium oxide,
2) its conversion, by electrolysis, to aluminium, and 3) possibil-
ity of aluminium production by an electric furnace, Ad 1) Two
processes are available for aluminium oxide production: the Bayer
process which is only applicable to high-grade, sio -poor
bauxites and the older fusion process which is limiied to lower-
grade bauxites. The aluminium works in Czechoslovakia are based
on aluminium oxide, produced by the fusion process from lower-
grade Hungarian bauxite, The process is more complicated, energy
expenditure is higher and the material is not very well suited for
electroconductive aluminium. A special desilication process is
Card 1/5

Some problems of aluminium production Z/034/61/000/010/001/002
E112/E553
inserted in the Czechoslovak plants It is suggested that lower
grade bauxites may be processed by a combination of the Bayer and
fusion methods, but difficulties may be encountered at some stages
of the process, particularly during filtration of the residues of
iron oxides. Production costs of aluminium oxide and aluminium
are itemized, indicating that raw material costs are,the decisive
factor for aluminium oxide, while electric energy is the essential
factor for aluminium,
Aluminium:
Raw-material ......................... 56% (from 80% A120 3)
Electric energy ................... ; .... 22%
Wages ................................. 3.9%
Maintenance ............................ 11.2%
Special costs .......................... 2~2%
Works overheads .... .................... 4,7%
Total ~ 1m0%
Card 2/5

Some problems of aluminium production Z/034/61/000/010/001/002
E112/E553
Aluminium oxide:
Raw materials7bauxite) .................. 28%
Energy (electric, steam, water, air) ..... 29%
Wages ................................... 5.5%
Maintenance .............................. 37.5%
Total 100.0%
The complex nature of the aluminium process is mirrored by high
maintenance costs. Supplies of Hungarian bauxite are limited
and domestic raw materials will have to be investigated. The
kaolinites from the North Bohemian coal basin (dry contentst
30-35% Al 0 4o-45% SiO 2-1.0% Fe 0 1-6% TiO ) are,
2 31 21 2 31 ~ 2
theoretically, of interest because of the relatively high Al
content, but the high S102 ratio, on the other hand, would
necessitate a preliminary treatment. Although the process would
be complicated, it is estimated that costs would not exceed that.
of the fusion process from low-grade bauxites. Reliable data
could, however, be established only after prolonged pilot-plane
experiments. It is generally estimated that aluminium production
from domestic materials would require a period from 8 -to 10 years
Card 3/5

Some problems of aluminium production Z/034/61/ooo/010/ool/oo2
E112/E553
before it could be established successfully. The purchase of
bauxite from overseas may be necessary. Ad 2) The electrolytic
process for aluminium production from Al 0 is described in detail.
2 3
Types of electrolytic cells are reviewed. Aluminium works ought
to be built in the immediate vicinity of cheap electricity supply.
The problem is complicated by the fact that power stations in
Czechoslovakia are located in the more densely populated agri-
cultural districts. The effects of the toxic anodic exhalations
have to be carefully examined. These considerations would suggest
that production units should not exceed an annual production of
100 000 tons of Al. In order to improve the economy of the
electrolytic process, the use of semiconductor rectifiers and
large electrolytic cells with an intensity of 100 kA are recommaided-
Ad 3) Discussion of electrothermic process. It should be possible,
on theoretical considerations, to meet the entire Czechoslovak
requirements of aluminium,alloys (silumine, an alloy with
silicium) from domestic raw materials (low-grade kaolines) by
using the electric arc process. The construction of a high-
capacity single-phase arc furnace remains the main problem, The
purchase of a pilot-plant furnace from Eastern Germany is
Card 4/5

Some problems of aluminium production Z/034/61/000/010/001/002
E112/E553
recommended, The results of some Soviet experiments with an
experimental furnace of 16 MVA should be awaited.
ASSOCIATIONi Hutnl' projekt, Prague
SUBMITTED: july 11, 1961
Card 5/5

38036
S/263/62/000/0051001/010
1007/1207
Author.- DvolhZek, Josef
Title. MEASURING DEVICE FOR TRANSDUCERS, BASED ON THE INVERSE
MAGNETO-STRICTIVE EFFECT
Periodical! Referativity), :hurnal, Alashinostroyeniye, no. 5, 1962, 18, ab-stract 32,5.99 P (C7.cch. patent,
class 2/e, 31, no. 95458, 15.06.1960)
Text. A patent has been issued for a phase-sensitive device designed to measure the voltage of a transducer;
the latter consists of a ferromagnetic tube in which a cylindrical magnetic field is generated by means of an
a.c. excitation winding the leads of which pass through the tube. When a torque is applied to the tube, the
cylindrical magnetic field is distorted and an E.M.F. isinduced in the secondary coils wound around the tube.
The winding of the transformer feeding the excitation winding of the transducer, forms the auxiliary voltage
source, The secondary (winding) of the transformer has a central output connected through the device with
the slider of the potentiometer. The potentiometer outlets arc connected through rectifiers and regulating
resistances with the excitation winding so that the inlet of one tapped coil is connected with one end of the
excitation winding, the second end of which is connected with the end of the second tapped coil. Such a cir-
cuit permits the transducer to be connected with the measuring device by four conductors only
[Abstractor's note: Complete translation.]
Card 1/1

MODR.9 Z.; HERLAR, Me; GRAFNETTEROVA, J.; DVORACEK, K.; BIAHA, V.
Oxacillin in macroorganismoo Case lek* cesk. 104 no.27/28:
735-742 9.il 165.
1. Vyzkumny ustav experimentalni terapie v Praze (reditel
prof. dr. 0. Smahelp DiSc.)q VoJensky ustav hygieny, epi-
demiologie a mikrobiologie v Praze a I intermi oddeleni
Thomayerovy nemocnice v Praze-Krci (vedouci 14JDr. J.A.
Trojan).

0., 1)r(,f. dr., DrSc.; GRAMEYPEROVA, J.; SUIUCK, 0.; D'70H.A.0EK, X.;
1NIUM, J.
Renal excretica of ~-azaumcjlrilx-,s-,dfs in mm. Cas. lerk. cesk.
104 ilo.121308-311 20" tL-165.
1, Vyzlr-.ioxiy itstav experimcmt~ihii tarmpie. it i3-Aerni. -atedra
I
-,ta,.-u pro lelk-ar-A %f Praze dr.
U: A - - :
C. Smahel., DrSc.).

SMAIIEL, 0.; SGMCK, O.j Technicka spoluprace: NECASKOVA# A6,1
BAMBASOVA, Z.
Distribution capacity and plasma and renal clearances of penicillin
G. Cas. lek. Ceek. 104 no.4ltlll7-1122 15 0 165.
1. Vyzku=y ustav experimentalni terapie v Fraze (reditel prof. dr.
0. Smahel DrSc.).

C " ~;% C, ZK , L. ; SPILIT"I , M.
I
W
"Some problems of orvan-*L~ation in industrial management."
u
p. '113 (Illutnik, Voll. 8, No. 4, 'pril 1958, Pratia,
Montily Index of &n-st Evirolpean jLccessions (i~~I) LG, l'ol. 7, No. 9, Septe:nl.-,-.r 195'8.

DVORAGEK, M.;PVORAKI 'J.;KUB0VT' A.
3~
Antibiotics in the treatment of diarrhea in children and establishment
of the sensitivity of ititestinal flora, Pediat. liety, Praha 7 no.5:
291-293 Sept-Oct 1952. (CZXL 23:4)
1,.0f the Regiona.1 Sanitary lpidemiological Branch Station in Hosty
(Head--M. Dvoracek, H.D.) and of the Pediatric Department (Read--J.
Dvorak, M.D.) of Koety Hospital.

WIPW"Ey, Yilos
DVORAK, J1ndriah, Dr; D70RAOXK, Milos, Dr; KUBOYT, Algmwdr, Dr
Rapid test for the requiremou t of antibiotic in diarrhea in
infant by means of complex sensitivity reaction. Fediat. listy
9 ito.2:88-89 AP '54.
1. Z detskeho oddeleni namocnice v Hosts, prednosta Dr D7orak
Jindrich a z krajoke hygianicko-spidemiologicke stanice v Koste,
prodnosta Dr Woracek Kilos.
(DLARRM, in infant and child,
*tbmr., antibiotics, rapid test for requirement of anti-
biotic by complex sensiWiity reaction)
(ANTIBIOTICS, therapeutic use,
*diarrhea In inf., rapid test for reqmirement of anti-
biotic by complex sensitivity reaction)

DVORACEK, M.; MUZIKAR, V.
Problems of occurrence and action of anaerobic microorganisms on the quality of
meat and meat products. P. 474.
CESKOSLOVENSKA HYGIENA. Praha, Czechoslovakia. Vol. 4, no. 8, Sept. 1959.
Monthly list of East European Accession5 (EEAI) LC, Vol. 9, no. 1, January 1960.
Uncl.

DVORAM I M
"Solution for the coiwat ielation between animal and plant production on stock-
breeding farms." (P. .365) - ZA SMIALSITICKE ZEMMISTVI (Ministerstvo zemedelstvi
a Ceskoslovenska akademie zomedelskychved) Praha, Vol 4, No 4. Apr 1954
SO*. East European Accessions List~ Vol 3, No 8, Aug 1954.

DVORV,F,K, M. ; HOU, C.
Activitiei of the Research Institute of Clattle greediqg.
p. 247
1101. 3, no. 5, 1956
BESEDA VENTKOVSKE RODINY
Praha
SO: Monthly List of East EuropeAn Accessions (EEAL), LC, Vol. 5, no. 12
December 1956

DVORACEK, 114.
"Results of the investigation of the redspotted cattle."
VESTNIK. Praha, Czechoslovakia, Vol. 5, No. 7/8, 1958.
Monthly List of East European Accessions (BEAI), LC, Vol. 8, No. 9, September 195.0.
Unclassified.

STEJSKAL, Jan; PIMNIK, Jan; HRUSKAp Ladislav; SVOBODA, Jaroslav; NAJMR,
Stanislav; PREININGER, Miroslav; HAUNER, Frantisek; BENDA, Josef, inz.;
KRAJUOVIC, Vladimir; VLCEK, Kveto6lav; KRBLICH, Jan; CERNY, ladislavDr.;
DYDBAU&,_MLrqA1av. inz. dr.; CRYTRA, Frantisek, inz.; FOLTYN, Jiri;
VYSKOT, Miroslav; kAMBERA) Jaroslav, C.Sc. Doc.Inz.; KOSIL, Vladimir;
STUCHLIK, Jaroslav, Inz.; NAKLADAL, Jaroslav, Inz.; RICHTER, Iev, MVDr.
Statements of directors of institutes, and of managers of workplaces
of the Czechoslovak Academy of Agricultural Sciences. Vestnik CSAZV 8
no.8/9:496-531 161.
1. Dopisujici clen Ceskoslovenske al-ademie zemedelskych ved. (for
Stejskal, Plesnik, Hruska, Svoboda, Najmr, Preininger, Hauner, Benda.,
Krajeovic, Krblich, Dvoracek, Foltyn, Vyskot, Kosil) 2. Clen redakcni
rady Vestniku Ceskoslovenske akademie zemedelskych. ved (for Plesnik,
Preininger, Foltyn,, Vyskot) 3.Reditel Vyzkumneho ustavu zivocisne
vyroby Ceskoslovenske akademie zemedelskych ved v Uhrinevsi (for
Dvoracek) 4. Reditel Ustavu pro vedeckou soustavu hospodareni Cesko-
slovenske akademie zemadelskych ved v Fraze (for Benda)
(Czechoslovakia-Agriculture)

DVORACEKj Miroslavq inz.
Solved tasks concerning the ainimai production, Vestnik vyzk
zemadel 8 no,3.0:463-465 162, ~
I* Reditelp Ustredni vyzkumy ustav zivocisne v-yrobyp Uhrineves.

DVORACEK, Mirool*v,, dr., inz,
Activities of the Central Research Institute for Animal
Production in Uhrind*98* VeStnik " zemedel 9 noolO:487-490
162, .
1 111 Rediteig Ustredni vyzku=y ustav zivocisne vyrobyp Tjhrineve;3,

"ma Vol 12111. rwrii-ml :"nv r~()
3437. THE VALUE AND SIGNIFICANCE OF SPLENECTOMY FOR T1113 RADl-
CALITY OF ABDOMINOTHORACIC OPERATIONS IN CANCER OF THE
STOMACH AND CARDIA - 0 v~znamu a cend splenektomie pro radikalitu
abdom inotora kiln rho v9konu u rakoviny faludku a kardio - Dvo f 4 Ee k
A A e- . Chir. Kiln' , Palackdho Univ., Olomouc; Pat. Ustav. Ldk. Fak.,
'~ai ~~o Univ. Olo~ouc - CSL.GASTROENT.VYZ, 1959, 13/1 (0-20)
Tables 13
A report of the results of a detailed study on the lymphatic dissemination of cancer
of the stomach and cardia with special attention to the lienal lymphatic area. A
total of 63 specimens was studied. In 40 the lymphatic system was invaded by
metastases and in 12 (30%) there were metastases in the lymph nodes of the lienal
area. From the total of 147 lymph nodes from the lienal area in the twelve speci-
mens mentioned, in 31 nodes (21%) metastases were found. The group of supra-
pancreatic nodes was most heavily affected with metastases (41% of the glands);
8% of the hilar nodes had metastases. It is stressed that simple splenectomy with-
out concomitant resection of the adjacent lymphatic system especially the para-
pancreatic nodes along the Ilenal vessels does not represent a substantial con-
tribution to the radicality of the abdom ino-thoraric surgical operation In cases of
gastric cancer and cancer of the cardla. Among 10 patients with metastases in the
lienal area only 2 survived for more than 3 yr.; no patient survived 5 yr. after
the operation, (IX, 5, 16)

DVORAGEK. V
.9--- -- . I~--- - "J" --
Electric traction without accident. Zel dop tech 10
t62.
A
no.114338-339
i '- -

DVORACEK, Vaclav. inz.
Z-, ,
Reconstructiot of the E 669.1 algatric locomotives. Zel dop tech
11 no.10:287-289 t63.

DVOIIA-Cr,K, Vladimir, inz.
Unified traffic sips wIll. facAlitate drivint. SlJn doprava 13
no.1:12-13,26 Ja 165.

D-voractk, Z.
United toward further success. p. 205. PAPIR A IVELITILSA.
IMinisterstvo lesu a drevarskeho prumyslu) Praha. Vol. 9,
no. 10, Oct. 1954
SOURCE: EFAL - LC Vol. 5 No. 10 Oct. 1956

DVOh,111ca-1. Z.
6 GC- F1 I G TE
?EEjCE,ICALS- CMKO.SLC.VT'T',,'I'XY CASOPIL f FC FYISIKIT. Vol. F, ne. 4, 1958
n;'OFJ`,Ca, Z: The elastic coupling between longitudinal and transversal
vibratinns, of !.sotropi.c roils. T). 50F
Monthly List of aist European~~Accessl-ons (EEAI) LC, Vol. 8, nol 5
Fay 19.rS-, UnclasF.

651977
Z/037/60/000/02/008/018
Og~/sE335.
AUTHORS: _Brdi~lca, Miroslay, Nov~kovAjv U, larketa and
_.DvoUeek, _Khn4k
TITLE: On Two Approximate Methods of Computation of Longitudinal
Oscillation0Frequencies of Homogeneous and Isotropic Barwv
PERIODICAL: Ceskoslovensky casopis pro fysiku, 1960, Nr 2,
PP 136 - 146
ABSTRACT: The authors review the two best known approximate
methods of computation of longitudinal oscillation
frequencies of rectangular and circular cross-section
bars, namely, those of Rayleigh (The Theory of Sound, Vol
I, London 1926, 251-252) and of Giebe and Blechschmidt
(Ann. d. Phys. 18 (1933), 5, 417, 457). The correction
introduced by Rayleigh improves the frequency equation
only for some of the lower oscillation'frequencies but
at higher frequencies there is still a considerable
divergence between the corrected equation and the measured
frequencies. A much Iletter agreement between calculated
and measured frequencies is obtained by the calculations
of Giebe and Blechschmidt , who derived a frequency
Cardl/6 equation on the basis of the theory of coupled oscillations

65977
Z/037/6o/ooo/o2/oo8/oi8
E079PNRgitudinal oscillation
On Two Approximate Methods of Computation
Frequencies of Homogeneous and Isotropic Bars
of systems with a finite number of degrees of freedom.
The fields of application of both methods and some of
their disadvantages are discussed. The authors also
review the work of Mindlin and Herrmann (Col:umbia
Univ.,NY, Dept, Civ, Eng., Sept., 1951) (this paper was
not available to the authors - only a review of same by
Malvern - Appl.Mech. Rev. 5, 1951, 1308) and the work
of Mindlin (J. Appl. Phys. 22, 1951, 316), although this
does not relate directly to homogeneous and isotropic
rods. The paper deals in particular detail with the
theories of Rayleigh and Giebe and Blechschmidt, which
formed the starting point of experiments by the authors
of this paper to obtain a better agreement between
calculated and measured frequencies and the result of
this work forms the subject of a separate paper.
The authors conclude that the mlative failure of the
Giebe-Blechschmidt theory of longitudinal oscillations
for rods of rectangular and circular cv-oss-section can
card 2/6 be understood by considering the success of this theo .ry

65977
Z/037/60/000/02/oo8/oA
Eff3~ERi2t,di,al Oscillation
On Two Approximate Methods of Computation 0 0
Frequencies of Homogeneous and Isotropic Bars
for thin tubes. In the latter case, the conception of
coupling two suitable oscillation systems leads to
results which can be obtained from theoretical consider-
ations based on the fundamental dynamic equations of the
theory of elasticity and this also explains the good
agreement between calculated and measured frequencies.
Giebe and.Blechschmidt tried to apply this procedure,
which was successful for thin tubes, for rods of circular
and rectangular cross-section. The thus obtained results
are not sufficiently related with the theory of elasticity
although in the first series of experiments the measured
values of the frequencies of rods of longitudinal and
circular cross-section were in good agreement with the
values predicted by the coupling theory. It appears
that the main difficulty of their theory is their adherence
to the dead zone, which is contradicted even by their own
measurements. The question arises whether addition ' of
Card3/6 higher frequencies of transverse oscillations would not
be helpful in the ca se; from the point of view of the

65977
Z/037/60/000/02/008/018
On Two Approximate Methods of ComputationEOZYNAjitudinal Oscillation
Frequencies of Homogeneous and Isotropic Bars
Giebe-Blecihschmidt theory the value of the coupling
parameter will become important since according to the
conception of both authors the character of the coupling
would no longer be the same. The authors of this paper
believe that the question of coupling parameters is more
complex than appears from the Giebe-Blechschmidt theory,
according:to which the magnitude of the coupling parameters
does not depend on the class of longitudinal oscillations
and is equal for all the theories. Its determination from
limit frequencies is also doubtful in spite of the fact
that the results have justified this procedure to some
extent. Thus, the theory of Giebe and Blechschmidt (or
the theory of Giebe and Scheibe) was fully successful
as long as the results obtained were equal to thoseobtained
by the 'theory of elasticity, i.e. for thin-walled tubes.
It appears that by introducing coupling between systems
with finite degrees of freedom the laws of the theory of
elasticity are not fully adhered to in the case of solid
Card4/6

65977
Z/037/60/000/02/008/018
E?7~4
On Two Approximate Methods of Computation 0 nNiNudinal Oscillation
Frequencies of Homogeneous and Isotropic Bars
rods. Therefore, the authors have attempted to derive
approximate equations for the frequencies of oscillation
of solid rods by another method described in an earlier
paper (Z~s'.ras.fys. 8(1958)9 50). As starting equations
e ofe e crell (2.8)
22 11 33 ~
av au aw au
a . - t - = - C( (2.9)
ay ox az ax
were used, where e ij are the strain components and
U2 IM v and u 3 S. w are the components of the elastic
displacements in the direction of the y and z axes;
the equations were generalised., i.e. instead of the
Poisson constants d , the two parameters y and Y
Card5/6 were introduced, which as a general rule vary with the

65977
Z/037/6o/ooo/Woo8/oA
On Two Approximate Methods of Computation'091VENjitudinal Oscillation
Frequencies of Homogeneous and Isotropic Bars
order of the oscillations and for their determination a
condition is introduced that the appropriate frequency
assumes a steady-state value. Under certain simplifying
assumptions.the authors succeeded in obtaining equations
for frequencies, the results of which are approximately
in as good agreement with the measured results as results
calculated according to the Giebe and Blechschmidt theory
and there Is the advantage that this method does not rely
on the conception of a dead zone. There are 18 references,
of which 9 are English, 8 German and I Czech,
ASSOCIATIONS: Matematicko-fysikdln:L" fakulta University Karlovy, Praha
(Department of Mathematics and Physics, Charles University,
Pracue)
V:fzkumn~ i6stav matematicky'ch stroju, Praha
(Computer Research Institute, Praxue)
Lfstav technick4~ fysiky CSAV Praha
Card6/6 (Institute of Technical Phy;ics, ?!SAV,_Prague)
SUBMITTED: December 1, 1959

P.. MIX and 1. D1701W.'ItOVA, Infectious Plowies ^Hrir (IrC'ekcni
ocen ~rd. (%~:DMrOl,; ar-' Dei,,~-etment of Ilotbolni-ical
Anatomy (ratolooickoanatomicky ustav) !lead Trof Lr :,u , D r S c
"tet"Ical raci.,Ity (LekRrOka falmIta) IKU II-Aversits, Charles
','ralove.
"Dia-nosis of Acute Thamuri rcistin!:v,
161, Vo 2, 11 Ja,, 60, rr 11-51.
r ra- 6
Vo L
F':n:;Iis~ smm-Lary modii'iC'Al: Degic'eirt'lon arld (IISCttsSion of tvo
s CIS ilk; "irst was #,cci&ntnJ In-estior. of rw' Folsor cnrtainjll~; 2"~
!)y iioTmn a~~cd 22 kil~~ ty-fut" ~1,7--~CG:Iss includin-,
a!o,ocia and so that It vws riltltnu~
-,evirad 6 mondisl hosplta'l.:tFt!vn tlith
V. C nccon,! msc , -umrian --y cd 4';, haf, T,,ir-
in rcsr'razor~, raral-7sin and cartl iova scl, lar failtirr. nL'trr rrtccivi:~,$
antitovln,, !;-Iect-.w,,ral-h,- of brain revealed Til, cvennial rorcTi::'Lc
Idecislon st~icido. 26 7as"cinu, 11. 7-zeclli, 'I Tolish rrferc-nce. 1/1
L- -j

DVORAGKOVA, J.
Water supply conditions abroad. Vodni hoop 15 no.3:139-110
165.
Water resources conditions in India. lbid.:117-118

CZECHOSLOVAKIA
LICHY, J.; Institute of Pathological Anatomy (Us-
tav Patologicke Anatomie) Head (Prednosta) Prof Dr A. FINGERLAND,
Neurological Clinic (Neurologicka Klinika) Head (Prednosta) Prof
Dr 141. SEROL, Pediatric Clinic (Detaka Klinika) Head (Prednosta)
Prof Dr J. BLECHA, Medical Faculty Charles University (Lek. Fak.
KU), Hradee Kralove.
"Clinical and Anatomical Findings in 4 Cases of Familial Amaurotic
Idiocy."
Prague., Ceskoslovenska Neurologie.. Vol 29., No 4, Jul 66, pp 255-2060
Abstract /Authors' English summary modified_7: Four cases are do-
scribed-; -two siiowed the infantile form and the patients died at the
age of 17 and 30 months. Two were of the late infantilo type and
died aged 9 and 11 years. In the infantile types,pyranidal signs,
hypornimia, spastic we-ping, and tremor at rest were observed. Lab-
oratory findings showed hypoglycemia. Degenerative changes in gang-
lion cells in the whole CNS were found. Intonse scavenger reaction
of the mobilo type, secondary gliosis, and demyelination were pres-
ent in the infantile, not in thn late infantile type. 2indings are
similar to Niemann-Pick's disease. 5 Figures, 2 Tablec ', 6 We0stern
1/1 references. Ms. rec. 7 Jan 66).
- 38 -

Alt
urablo sod iiggregafe* as fActors at wu so-=cure
,Ckl6q
ton III lie
dtimbLe 161 Tb, -1~
-n-t ~Wtll! !L-l
A
ht
q.-ity rh,,
in I
L;nde.t Ailinurms rultjv~fion -d
1,!,, .0 It the ~Ilr i:I, b

100SEMCtrala shaus Of'Hudgulan gdL MW&
.kador KIimes--Szmik, and F&A re a-ITYMM16
fun., Budapest). AJTOMK~4 il
-Water stabiiit3r of " istrecatei etd. by the Savinay
-method, dightly modified by DvomcscL-. showed that th
stability of sad aggregates under a natux-al vegetation
I- t Compfetely indep-Mdent of Soil type and of quality
aatur~J v~cetzdoa_ Hungarian Soils Under & MaEUMI VCge-
tidan cont3in an Oe ay. M-76% watrr-5cable ag~regmrs,
~xctpt s-)Lh of virgta mtsdovn formed on very Light sand
.SOILS. Water stability of aguezates was best In topsoil in
soils under a aatural vegetation. Soils-in continuous crop-
_2LnL_Lhq!t~-_jIj eteri~).ira struc-is. L F~InAIL

& Vqf

'r . PI
jrlAtUA tw 0 Influence of ItIckfitell'an the Watef std of 00 ag.
fegates. Allk)hs Dv*acsek, 4ador Kht"WoZzm1k, and
S&ra F4Kr (Agrochem. Rfwarch Inst., Budapest).
A;roklmia Is Talajfan 2. 17-' 210(19M).-The "amn. of 24
soil samples representing the types most frequently occurring
In Hungary, which 1. the original state contained nU-
67,80% water-stable aggregates, was cnrried out by detg.
the water stability of artificial aggregates prepd. from pul-
verized soil by the addn. of 1101% water of the sticky point
value by Amny's technique (C.2. 2j, 2703). The cement.
ing effect of org. substnticei lrrevmihly cwguinted (re-
sponsible for the water stability of soil aggregates with a
stnicture) can be eliminated by the prepti. of artificial ag-
gregates. The cementing effect of min" colloids was
not observable when artificial " fes, net prepd.. from
solls or from Orgin soils= type.

D V OR A C,-- F, K ~ '," .
Let us knov, our soils; humus and soil bacteria. p. 8. (Ma-,yar Vol. 11 ,
no. 1, Jan. 1956 Budapest)
SO: Monthly List of East European Accession (E-111,L) IC, Vol. 6, no. 7, July 1957. Uncl.

DVORACSEK, Y.
Let us kjimi our soils. p. 12. (Mar
yar Mlezorgazdasag, Vol. 11, no. 2, Jan. 1,056 Budapest)
SO: T.-Ionthly List of East European Accession (E-EAL) IL, Vol. 6, no. 7, July 1957. Uncl.

DVOR.A,CS'-`K, Mi.
The first steps. p. 12. (Yjagyar Nlezogazdasa.r, Vol. 11, rio. 2, Jan. 19-56 -%dapcst)
SO: I'lont'dy List of East European Accession (EEIM ) Ir,$ Vol, 6, no. 7, July 1957- uncl.

DVORACSEK, M.
Endurance of soil structure. IV. p. 10. (Magyar !,Iezogazdasag, Vol. 31, no. 4,
Feb. 1956 Budapest)
SO: Monthly List of East European Accession (BEAL) LC, Vol. 6, no. 7, July 1957. Uncl.

HUNGARY/Soil Science - Physical and Chemical Properties of Soils.
Abe jour : Ref Zhur - Biol., No 3, 1958, 10503
J-3
Author : Dvoraesek, M., Dvoraceek-Vadanyi, M.
Thst : Agricultural Institute of the Hungarian Academy of Science
Title ; The Structure of Virgin and Cultivated Soils.
Orig Pub : Magyar tud. eked. agrartud. oszt. kozl., 1956, 9, No 1-3.,
111-157
Abstract : This is a description of the results of an investigation
of the aggregate composition of argillaceous chernozems
and raeadaw-argillaceous soils conducted by the Institute
of Agriculture of the Hungarian Academy of Sciences in
Martonvaros. Water-resistant lumps, 1-5 mm. in size, pre-
dominate under the virgin soil. Cultivating the soils
leads to an increase in the quantity of the less valuable
coarse fractions and the excessively fine fractions.
Card 1/2

WNGARYISoil Science - Phycical and Chemiccrtl Properties of Soils. J-3
Abs Obur : Ref Zhur - Biol-, No 3, 1958, 10503
The water-resistance of the lums declines noticeably in
connection with reduction in their diameter. The T)orosi-
ty of separate lumns of virgin soils is higber than that
of lWMs of cultivated soils. Data on observations are
given in 19 tables.
Card 2/2

DVORAK.
A conference of inventors and improvers in oil industries. p. 315.
PRU~ffSL POMWIN. (Ministerstvo potravinarskeho pzuVslu) Prava, Czechoslovakia.
Vol. 10, no. 6, June 1959,
J.
Monthly 14St of East European Accessions (BEAI) LC, Vol, 8, No. 3-19
November 1959.
uncl,

COUTRY :
CATEGORY 'Jultivaterl A?la-nts. Fruits. d5orrics.
ABS. JOUR. RZhBiol., J;o, 23, 1958: lio. 101.858
AMHOR
INST,
TITL Z, apple 'A'na Variety - Oldenburg
OR-TG. PUB. Ovo~m5r. a zelinar.p 1953, 6, 'lo. 3, 70-71.
ABSTPACT i ilo abstraot.
eArwt 1/1-
154
L

V o R-AAr
L41magraphic Lad potentioinetric dutermManwi qLk.%&Thn~_~
d

/1
MRM"p A. (Praga, Chakhoulovaldya)
C~~~~
Investigating soil properties by meanq of penetration testing,
Osu. fund. i mekh. grun, 2 no*6:27-30 160. (MM 13:12)
(Soil mechanics)

DVOW, A.
Dvorak,, A.
Improvement of the Fbkrok IM flax gatherer. p. 213.
Vol . 5. no4 Us June 3.955
NECHANISACE ZEMEDILSTVI
SO: Yonthly List of East European Accession# (EEAL)'Lr,., Vol. 4p No. 99
Eept. 1955, Uncl.

PVORAK, Arnost inz dr
Seismic effect of explosions on brickbuildings. Geofys sbornik
9:355-380 161.
1, Geologische Erkundung~ Praha.

DVORAK, Arnost,, inza., dr,
Construction of the bridge over the Yangtze River near
Wuhan in China, Inz otavby 6 no,3:166-167 Mr 158.

DVORAK, A.
Practices in laying foundations, p. 242, INZENYRSKE STAVBY. rraha, Vol*
2, no. 7, Jully 1954.
SOFJRCE% East European Accessions dot (EFX,),LC, Vol. 5, no. 3, March 1956.

DMAK, A.
Measuring vibrations In foundation soils and in foundations. p.222.
(nammisKE sTAvBy,, vol. 39 no. 6,, june 1955,, Praha)
801 Monthly LIA of tast impew Accessiw,, (EM)., Wi Vol. 4. Iro. ut
Nov. 1955., Uncl.

'Draft of our new standards for foundation soils. p. 166.
INZENYRSKE STAVBY. (Viinisterstvo stavebnictvi) Praha.
Vol. 4, no. 4. Apr. 1956
Source: EEA1 LC Vol. 5, No. 10 1Oct. 1956

DVORA.K,, A.
DVORAK., A. Diagram for calculating the stress under the base of a foundation. p. 261
Vol. 4,, no. 7., Ju1Y 1956
POZEM STAVBY
TECHNOWGY
Praha, Czechoslovakia
SO: East European Accession Vol. 6, no. 2, 1957

DVORAK A
Measurement of vibrations caused by blasting openations.
P. 543o (Geofysikalni Sbornik) Ceased publication'# No. 36/60, 1956 (Published 1957)
Praha, Czechoslovakia
SO; Monthly Index of East European Acessions (EEAI) Vol. 6, No. 11 govember 1957

mor. m .1re, I A "l,t ~4, n c xio

DVORAK, A.
DVURAK, A. Pickling equipment. p. 350.
Vol. 6, no. 18, Sept 19505
I-MCHANISAGE ZEI,~EDZLSTVI
AGRIGLI'MIE
CzechoslovnPda
So: East European Accession, Vol. 6, ""o. 5, I-lay 1957

DVOM q A.
Dynamic tests of foundation soils, p. 232. (Inzenyrske Stavby, Vol. 5, No. 5.
May 10,57, Praha, Czechoslovakia)
SO: Monthly List of Fast European Accessions (EEAL) LC, Vol. 6, No. 8. Aug 1957, Uncl.

.Dvoln'K I la. -
"Fl~,in., under unf&-vorvible atmosoheric conditions. 11
P. 29 (hridla No. 10, May 1952, Praha, Czechosicvukia)
Mcntul.l~l Index of ",ast Acea331cns 1L, Vol. '1. 0, '14 ptl--~7'-~r !I-*-*'
- I i. I .

DVORAK, A.
"Dressing of mixed copper ores by combined leaching; cementation., and f.Lotation.0
CZECHOSIOVAK HEAVY INDUSTRY., Prague,, Czechoslovakia, 'No. 4,, 1959
Monthly list of East European Accessions Index (EEAI), LG, Vol. 8, Bo. 8.
August 1959
Unclassified

DVCRAKS A.
The large constructions of socialis.m in China; on the occasion of the
tenth anniversary of the Chinese People's Republic. p. 412.
INZEURSKE STAVEY. (Ministerstvo stavebnictvi) Praha, Czechoslovakia.
Vol. 7, no. 11, Nov..1959
Monthly list of East European Accessions (EEAI) LC, vol. 9, no. 1, Jan.
1960
Uncl.

85OZ,6
Z/038/60/000/00 5/0-03/0h
A201/A026
AUTHOR, Dio~hk, Alois
TITT-R,. The Problems of Corrosion of Construction Materials by Liquid Metals
PERIODICAL,. Jadern9L energie, 1960, No. 5, pp. 155 - 162
TEM- The article presents a review of research results on the corrosion
of construction materials by liquid metals, Its characteristic effects, and the
principal methods of its prevention. The fast-growing nuclear power Industry
is esp=-cially concerned with the corrosion by liquid metals, as certain liquid
metals, e.g., sodium, NaK-alloy, eutectic Pb-BI alloy iBmuth, lithium A
'~ lea b
and meroury offer themselves as excellent, reactor co6lantx their physical
properties. The most important physical and nuclear properties of these metalb
are shown in Tables 1 and 2, respectively, basecl on References 1, 11+ and 16.
Laboratory tests so far revealed the following types of liquid m-_~tai corrosion,
1) Uniform corrosion due to simple dissolution (Fig. 1), Reference 2. 2) Forma-
tion of alloys of the liquid and solid metals (FigG. 2 and 3), Reference 3. 3)
Intercrystalline disruption (Fig. 4), References 6 and 7. 4) Extraction corro-
sion, i.e., dissolution of just one component of the structural material, Refer-
Card 1/7

85a_)6
Z/038/60/000/005/003/004
A201/AO26
The. Problems of Corrosion of Construction Materials by Liquid Metals
ence B. 5) Corrosion due to the effects of impprities contained-In liquid met-
als, Referenoes 1 and 9. The most Important factors influencing the c-arrosion
proceae In a given system are the following3 IN, Overall thermal conditions of
the entire circulation system, i.e., the raising of the operation temperature,
oyolic variations of the operation temperature, and the heat. gradient of -the alr-
culation system. 2) 1he amount of impurities in liquid metals. 3) The flow-
speed of liquid metals. 4) The number and variety of materials 5imultaneously
attacked by the liquid metal. 5) Concurrent, mechanical stresses of the struc-
tural material. The most important of these factors is the temperature, as the
i~:-Iubllity of solid metals in liquid metals, and the diffusion speed increase
w-.I,th- increasing temperature. In addition to the increasing corrosion speed, ,A-
evated temperatures also stimulate the formation of a specific type of corrosicr-L',
e.g., the higher the temperature of liquid sodium trLe greater the tendency tcwar-d
formation of intercrystalline disruption of austenitic stainleas Bteel5. A150,
the greater the cyclic temperature variations, the more extensive Is the. corro-
sive disruption with all other conditions remaining the same. The speed and
progress of corrosion disruption are further influenced by the difference of tem-
Card 2/7

85026
Z/038/60/000/005/003/004
A201/A026
The Problems of Corrosion of Construction Materials by Liquid Fetals
peratures between the hot and cool loops of the heat exchange system. Ithas
been established that the speed of iron dissolution in mercury Is strongly de-
pendent on this temperature difference, while this dependence is negligible for
the dissolution of Iron in sodium (Ref. 1). The temperature gradient Is respon-
sible for the so-called mass transport, which is an accompanying effect of sor-
rosion processes in liquid metal environments. The construction material is
dissolved in the hot part of the system and the solution in liquid metal flows
to the cooler part of the system, the temperature drop causing oversaturation of
the Bvlution. This, in turn, stimulatesthe formation of crystal nuclei from
which originate the growth and deposition of solid metal particles within the
system (Fig. 5). The speed of corrosive disruption is frequently influenced by
the contents of impurities in liquid metals. Thus, oxygen content is responsi-
ble for the aggressiveness of liquid sodium to most materials and, at higher con-
centrations, provokes the dangerous intercrystalline corrosion. In this respect,
stainless austenitic steels are more susceptible than ferrite steels (Ref. 1).
The influence of oxygen contents on the speed of corrosive disruption is shown
in Table 3, based on Reference 10. The flow speed of liquid metals asserts it-
self especially when the construction materials have already been damaged by
Card 3/7

85026
Z/038/60/000/005/003/004
A201/A026
The Problems of Corrosion of Construction Materials by Liquid Metals
corrosion,, . It then accelerates the corrosion speed mainly by its mass transport,
erosLon and cavitation effects. This is a case of combined corrosion and mecha-
nical influences (Ref. 11). It was established that the flow speed has no,ap-
preciable effects when it remains below about 3 M/sec for bismuth, lead and mer-
cury, and below about 8 m/sec for sodium and Na-K alloy. When severall different
materials are attacked simultaneously by liquid metals, a combined effect of se-
lective extraction corrosion and mass transport may take place. As it was estah-
lished in a test with a molybdenum specimen placed in a nickel system with liquid
sodium, dissolved nickel was carried away and deposited en the. surface of the
molybdenum specimen resulting in the formation of a Ni-Mo intermetallic compound
and solid solution. Mechanical stress may also contribute to the acceleration
of corrosion processes. It was found that extraotion corrosion of stainless
allstenitic steels by liquid Pb-Bi alloy proceeds the faster, the greater is the
tensilq stress applied to the specimen by external forces. Mechanical stress
accelerates corrosion especially when the atom diffusion within the attacked
metal is the governing factor of the corrosion speed, since it increases the d-if-
fusion apeed and thus accelerates corrosion (Ref. 12). The moat detrimental ef-
'lard 4/7

8502,6
Z/038/60/000/005/003/004
A201/AO26
The Problems of Corrosion of Construction Materials by Liquid Metals
.0
fects of corrosion are the following., decrease of the cross section of stressed
parts; deterioration of mechanical properties, especially tensile strength and
ductility, of construction materials by selective intercrystalline corrosion;
structural changes of surface layers (transformation of austenite into ferrite,
carburization, formation of intermetallic compounds, etc); growth of solid met-
al. crystals in the form of dendrites on the inner walls of pipes (Fig. 5); for-
mation of compact mdtallic "stoppers" (Fig. 6) (Ref. 4); radioactive contamina-
tion of the heat exchange system by the transport of eroded active material (Ref.
13); and finally, the so-oalled "spontaneous welding" (Ref. 10) of two metallic
parts immersed in alkaline liquid metals. The determination of corrosion resist-
ance of the various construction materials is still a major problem. Static
tests have proven inadequate, since they are performed under ideal conditions
(perfect sealing against atmospheric oxygen) and, in addition, fully neglect the
complex effects of liquid metal flow. Corrosion tests with rotating specimens
immersed in molten metal approximate the actual operating conditions more close-
ly. Figure 7 shows a testing equipment of this type on which corrosion tests of
4 rotating specimens can be performed simultaneously (Ref. 17). Each specimen
has its-own vessel with molten metal, with argon atmosphere above the surface
Card 5/7

85626
Z/038/60/000/005/003/004
A201/AO26
The Problems of Corrosion of Construction Materials by Liquid Metals
sealed off by mercury. However, even these tests neglect such decisive factors
as the mass transport and temperature gradient. Most appropriate, therefore,
are laboratory tests in flowing liquid metals. Equipment for such tests is
shown in Figure 8, based on Reference 10. Since research into the problems of
corrosion by liquid metals is still in its beginnings, the only available meth-
ods of checking it consist 6f a prbper choice of construction materials includ-
ing adequate surface treatment and processing of the corrosive medium. Table 4
based on Reference 10 Indicates the resistance of specific materials to corro-
sion by certain liquid metals, facilitating a proper choice of materials. In
addition to this, however, a number of additional factors have to be considered,
such as the effects of "exteraa3" attacks by other media (atmospheric oxygen,
water, etc), properties of construction materials at raised temperatures, fabri-
cation feasibility (piping, fixtures, weldability), and the nuclear properties.
The aggressiveness of corrosive media (liquid metals), on the other hand, can be
reduced by refining sodium to a high degree of purity and by maintaining this
purity during operation; by admixtures of certain additives (e.g., Ca) to re-
duce the effects of oxygen in s6dium, in liquid bismuth and Pb-Bi alloy, by ad-
Card 6/7

85026
Z/038/60/000/005/C,03/004
A20i/Ao26
The Problems of Corrosion of Construction Materials by Liquid Metalu
dition of inhibitors (e.g., Zr and Ti), which form protective coatings on the
base metal surfaces. (Edited by M. Pe~sek.) There are 7 photographs, I figure,
4 tables and 17 references; 5 Czeob, 5 Soviet and 7 English.
ASSOCIATION: Stfitni virzkumnk 6stav ochrany materihlu G.V. Akimova (G.V. Akimov
State Research Institute of Material Protection) in Prague
Card 7/7

AUTHOR: Dvor-4~Ck. A.
36-4-1
Z/03;2~62/012/001/002/007
E073/E435
TITLE: Influence of mechanical stresses on the corrosion
of steels in the liquid alloy of lead with bismuth Ic
PERIODICAL: Strojirenstvi, v.12, no.1, 1962, 39-43
TEXT: To elucidate the influence of mechanical stresses on the
corrosion of steel which is in contact with liquid alloys at high
temperatures, corrosion tests under stress were carried out on the-
following two types of constructional steels, which had a hig4
resistance to corrosion and good mechanical properties at
elevated temperatures: 18-8 Ti stabilized Cr-Ni steel
(6SN 17246.1); refractory steel containing 5% Cr and 0.4% Mo
.(~SN 17102.6). The chemical compositions (%) of these steels
were as follows:
C Mn Si Cr Ni Ti Mo
Steel 17246 o.o4 0.24 0-05 17-0 10-9 0.70
17102 o.l.6 0.40 0.33 5.0 0.38
Card 1/3

zld~62/012/001/002/007
Influence of .... E073/E435
The steel 17 246 was tested after austenization, whilst the
steel 17 102 was tested-after bein& heat treated to a tensile
strength of 70 ICS/mm2. The corrosive medium was the eutectic
alloy of 44.5% Pb + 55.5% Bi; in addition to traces of
impurities of Al, Fe, Mg and Ti, the alloy contained 0.2% Ag and
0.03%- Cu [Abstracter's note: The total composition is in excess
of 100"'Q. No corrosion inhibitors were used. However, 0.15% Mg:
was added to act as a wetting agent. The test set up contained
a hot and a cold branch, so as to create a driving force for
producing a slow flow of the corrosive medium. After a slow flow
(a few mm/min), the type and extent of corrosion was evaluated
from polished sections. The tests were carried out at 5009C for
durations of 2000 hours (steel 17 246.1) and for 1000 hours
(steel 17 102.6). Stresses between 1.5 and'18 kg/mm2 were
applied. The results indicate that tensile stresses accelerate
considerably failure of austenitic 18-8 type stainless steels in
the tested medium, the maximum depth of penetration
of the corrosion increases
Card 2/3

Z/032/62/012/001/002/007
Influence of E073/E335
2
from 20 ji to,40 ji on increasing the load from 3 to 18 k9/mm
and the corresponding increase in the rate of corrosion is
from 0.09 to 0.18 mm/years A~similar increase in the rate of
corrosion was observed for the steel 17 102. These results
show that the corrosion-resi~tance of materials intend6d for
~mechanically-stressed,components of heat-exchangers should be
tested under stress since corrosion tests alone do not provide
a correct picture of the likely service life of the tested
materials. There are 10 figures and 2 tables.
Prague
ASSOCIATION. SV,(jOM,
Card,3/3

DVORAK, Alois
'The problem of ccTrosion by Uquid metals. Jaderna energie
6 no-51155-162 My 160.
1. Statni vyzkumny ustav ochrany materialu G.V.Akimova,-Praha.

. DVORAK, Antonin
Processing of zinc concentrates. Rudy 10 no.7:Suppl.sPrace
vyzk ust no.6t37-38 Jl 162.
1. Ustav pro vyzkum rud, Praha.

DVaW, ArnoBt
--------
Active tectonic zones. Cas min gaol 8 no.3:233-21+3 JI 163o

otivivo 42 no.1l1427-430
r-A.,Ne.

DVORAK A., inz. dr.
-- -1 0 -
Seismic effocts of the detonatlcn of exp-1--,sives. Ft. 2. Staviv, 42
no.22:464-.467 D 164.
1. Geologicky pruzkum National Enterpri8e, Prague.

L 38
.3-.6.6
AT6ol6648 klyj SOURCE CODE:
AUTHOR: Dvorak, Arnost
CZ/2512/64/012/000/0225/0241
ORG: Geological Survey, Prague (Geologische Erkundung)
q
e."-\
TITLE: Tests made to determine the intensity of explosion-caused
vibrations
SOURCE: Ceskoslovenska akademie ved. Geofyelkalni usta v. Geofsikalni
Bbornik, v. 12, 1964, Prague, 1P65- Prace,, no, 196-214
lop-
TOPIC TAGS, electrodynamic seneort blaot, teneometer, vibration 'measurement.,
vibration effect/ B5h electrodynamic sensor, B5 oub-~ z electrdynamic
sensor, DS-01 electrodynamic sensor
senso
ADSTRACT: The author-,describes a series of tests related to his earli
\` ffect of explosions on ordinary brick buildings,
works on the g_QjMU
Systematic tests with a constant charge of 20 kg have shown shorter
distances, while tests maintained at the same distance required an
increase In the 25 kg charge, Tests were continued until damage was
done to the brickwork. The measurements were made with a new electro-
inductive sensor, the Hottinger B 2/25 with a range of � 25 mm,___D!_r_ec
Card

L 3dLa
ACC NRs
-66
AT6oi6648
measurements of the vibration rate were carried out with the Hottinger
B5h and Hottinger B57 electrodynamic sensors. Acceleration of vibrations
C, 1.
was likewise measUre with the Czech DS-01 sensor equipped with a
differentiator. Lwf'orrationo of the brickwork were measured directly
with steel-tape tensometers, developed by the author, and with a
mechanical Cambridge tonsometer. The procedure for amplifying the
equipment and the preliminary intensity of the vibrations is tentatively
estimated. Formerly tests were usually made in neogenic clay. The
current tests are made in the same medium, but in one case, the clay
contained layers of water-msaturated clayey sands with the ground water
less than 1 meter below the surface. In another case, cavities
caused due to coal mining appeared in the Subsurface stratum. In the
first case, the seismic effects ranged from 1/2 to 1 point above
norinal; in the second, they were approximately the same number of points
be!614 normal* A series of tObts was also carried out with Chargos
~iAded in solid i-40.k. 1'fi thid i~dok tho vibration frequency is always
nja~jo~a thAo in soil, and, as a result, the vibration rate-increases
likewise, In this situation the high rate of propagation of elastic
Card
2/3

-L 38413-66
ACC NRe AT6016648
waves is advantageous, and less damage Is done to buildings than when
they are constructed on an earth foundation. Finallys in one case,,
measurements were made of chambered shots with an explosive charge
of 115 and 160 1cg. Concerning the blast index other conditions being
fulfilled, it was determined that, a 16% increase or decrease of the
charge did not effect considerable changes in the values obtained. Th
author also expla#s that the limits chosen for the discussion of the
.extent of damage to buildings on the basis of the vibration rate set b
120 kg charges are also valid for charges of approximately 1000 Rg. Th
.author then demonstrates the correlation between the extent of damage,,
,the weight of the charge, and Its distance from the building. Less
'Oevere damage is likely in the case of charges exceeding 5000 1% and
at distances of more than 1000 m. owing to the greater dispersion and
sorption of seismic energy. Orig. art, has: 12 figures, (GC]
,SUB CODE: 17/ SUBM DATE: 14Mar64/ ORIG REF: 004/ SOV REP: non
tM REF: 003
3/3

1) V (7
L4151~_6
-W
"TWIF
EPR/F.',[P(J)/T-2/Z-[G(a)-2/17.;P(h),IEP,%(bb)-2/EEC(c)-2/.TZD-2/!7.-.G(c)/FCS(k)/i:;P(by,
AIM45UO .. P1-4/Pw-4/Pk-4/0n_4/ B009 EXPLOITATION Pi_4/Ph_4/Pac-2/PB_ P. 4?716-
Po_4/pc-5/Pq_4/pnc_4/Fr_4 ' -IJP(c)' ' AST/TT/VW/DD/44/G :..!
Barvir, Mir6ulmv, (Engincer)'; ~cn~a, K6nrad, (Professor, Doctor); jicuolta irii
(Doctor); m-ail Ivo, (Gradu-cLt-a7BrT=6sopIiy) - cc-p'Lecha Zdcnck, C to of,
4 L.0 '
PhyGical and I-latlicratical Sciences), Codr, 1.'J-L VL--(Umir
(Doctor)* Dvor.* Antonin, (Candidate Bf -Vedical Sciences); Dyorak Jrvef'
Uth, VI dini, Candidate of Medical ScIcuccuo Docent, Doctor ; Horalc, Uenck,
(D3ctor or Mynical ancl Mathematical Sciences, Correaponding Ilember of the
Czechoulovalt Acadepor of Sciences, ProfeDoor, Doctor); llosp2dar, Xan, (Doctor o:C
phyisical mna'Itathematical Sciences, Doctor); Me k Joni (Doctor.); Most,
q2ALKL 40
tudate of Physical ana K210416vrl Rtj_~n; Korril.
_::M.117_~~Cr"(Doctor); Kopcc~X, Meal (Candidate of Legal Sciences ; 4~r .
I.Ldizlav (Candidate of ftsical and Mathematical Sciences); Zdcnck (Can-
didate of Phynical and Mathematical Scip iko
.noes); Lcdvina, car ; Mlc
VIA~,t~ loravek,_Man) (Candidate C'~cn~ 4&ICIncEars; Ijxa%CIC'
IT, (Doctor)i V
'71it
Jaroslav, (Candidate of Medical Sciences; Lngincer); Mra%ck Jiri (C,:ai ' a Of
I'Llechnic Scioncen); Irauzil, Ludel, (Doctor)) Novotny, 2 nek Candidate Of
Phyaical. =4 Mathematical 6clonces); 11ovou Zdenek (Dootozf;Pc=cSr, Jaro xv.
(Dooto,~A Candidate of Vapical lan& Mathematical Scio=64 Poce
Doctor, Engineer); ?i4l, Milonialp, (Doctor of Technical S a
member, ef the CzaWwalawk Academy CC Balances); Mayea, Hiroplavj (Doc
Yokorny, Zd=ekj, (CaudidatA of Z4aical wA X%ticmALiiI _Saladacs, DOMts Do*tor);
c&r,& 1/4

L 415ig-6.5
5no
RUMI, VladJnir, (Candidate of Medical Sciences, Doctor); Sadil Josef (Doctor of.
fi-valological ajA "M
iemes); uchr _IAdislav; 9 ari, (Do. rT,- __.~=tlm
Zdenck, (Doctor) * Tuma JaroslAy. (Candidate of Physical and, Ilathczatical sciences,,
TyTil, Vaclav,. Docent, Lngincer); Ulebla.- Ivan. (Candidate of Technical
Sciences, Professor, Doctor); Volnicek, Moris, tcanclidate of Physical and Ulthe-
uatical Sciences, Doctor); Viatyack, Wadirdr, (Candidate of Physical and Kathe-
zatical Sciences, Docent, Doctor); Vlr,--ak maxtan (Candidate of Physical &na
Mithe=tIcal Sciences; Doctor); v
Principles of astronautics (Zm%Ia4 Orbis, 1964. 445 p. 41111
biblio. 5000 copies printed.
TMC TAGS: coomouautioa, rocket, m&taUAt,*# space f1i ~Migalle
.ZMP= AND COVEME: This jublicatioa in a Ma= scientific reference book for.
peopla vorldma In Goommoatics. 7ho book Weeents a. wAr"y of c*mm==tIc* =A
space ZL'&t up to I Jum 3,963-
TAXZ C? CCbV=s
Card 2/8

DVORAK. '13MMOVA.
Waste water fromthe production of synthetic casings* pe 3411*
VODNI HOSPODARSTVI. Prahao Czechoslovakia. No. 8, August 10,59.
Monthly List of East European Accessions (EEAI) LC, Vol. 137, No. 11,
November 1959.
Uncl.

13. P- k1h.
1, foltc ~m, thyrime r:

JTLEK, M, Tacbmicka spoluprae)eLk-
presence of c-reactive protein in some dermatoses. Gesk. derm.
39 no.4:249-255 J1161+
1, lo dermat~~7enarolo&icka 'klinika fakulty vseobacneho lekarstvi
Ku (Karlovy universitYJ v Pra2e; prednosta z prof. dr. J.Konopik,
Moo

11':ilting ponds, the cmstant Froblen of carj) culture.", 1). 1.3, (3p."fi"iINT
7f 1. 21
vo 6) 11112., Fab. 195), Czochoolovakia)
L~v: !~'onthly List of East Eurarean Accessions, Vol. 2, 1i3, Library of
Congress, kiEust 19553, Uh,!.