SCIENTIFIC ABSTRACT YASTREBOVA, I.P. - YASTREBTSEVA, T.N.

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SCIENTIFIC ABSTRACT
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PATIL, Surendra J.- YASTEWYAO I.P. [translator); .12TKPANOV. L.V.. redaktor; IOVUffA. rodaktor. (Agricultural laborers in modern India and Pakistan. Translated from the Ingli shl Seliskokhostaistvennyo rabochie v Indit i Pakistane. Perevod a anglilskogo I.P.IAstrebovoi. Predislovie G.G.Kotovskogo. Hooky^, Izd-vo inostrannol lit-ry, 1955. 197 P, (KW 9:5) (India-Agritultural laborers) (Pokiatan-Agricultural laborers) YASTMOVA, I.P. 111hibit of school chemical apparatus. Xhin. v shkole 10 no.6:76-77 I-D 155. (MLEA 9:1) (Chemical apparatus) DANTSIGt B.M,t otva red.; SIIPIRTq A.Yu.t otv. red.1 YASTREBOVAp I.P.p otv. red.; DIZHURt I.M.p red. izd-va; Z(YfOVAt YV'.IT-.p"We."TtdL va; YUREVICH-P' L.I.f red. izd-va; EMSLAVSKAYA, L.Sh.9 tekbi. red. (Economic conditions of Asian and Arrican countries in 19591 Eko- nomicheskoe polozhenie stran Azii-i*Afriki v 1959 9. Hoskvaq lzd-vo voBtochnoi lit-rir, 1961. 509 P. (MIRA 14.- 9) 1. Akademiya nauk SSSR. Institut na-r'odov Aiii. (Africa-Economic conditions) (Asia-Economic conditions) POTEKHIN, I.I., glav. red.; BARANOV, A.N.j red.;.BELYAYEV, Ye.A., red.; GELLER, S.Yu., red.; GRAVE, L.I., st. nauchnyy red.; GRIGORIYEV, A.A., red.; GUEER, A.A., red.; KULAGIN, G.D., red.; MALIK, YJ.A., red. MANCHKHA, P. 1. , red.; MILOVANOV, I. V., red.; NERSESOV, G.A., red.; OLIDEROGGE, D.A., red.; ORLOVA, A.S., red.; POPOV, K.M., red. ROZIN, M.S., kand. ekon. nauk, red.; SMIRNOV, S.R., red.; UFIMOV, I.S., rod.; SHVEDOV, A.A., red.; YASTREBDVA, I.P., red.; PAVLOVAt T.I., tekhn. red. (Africa; encyclopedia) Afrika;-6ntsiklopedicheAk# sprdvoehnik'. Glav. red. I.I.Potekhin. Chlany red. kollegii: A.N.Baranov i dr. Moskva, Vol.l. A - L. 1963. 474 P. (MIRA 16:4) 1. Sovetskaya entsiklopediya, Gosudarstvannoye nauchnoye izdatell- stvo, Moscow. (Africa-Dictionaries and encyclopedias) SVANIDZE, Ivan Aleksnndrovich; YASTREBOVA I -PU otv. red.; PAVLOV, 'T 9 e A.G., red.; MIKHLIHA, [Agriculture of Northern Rhodesia] Sel'skoe khozisistvo Severnoi Rodezii. Moskva, Izd-vo vostochnoi lit-ry, 1963. 259 P. (MIRA 16;7) (Rhodesia, Northorn--Agriculture-Econo4ic aspeets) 'qnvostigat',on of tho :hy.,dco-Ter.-hni.cnl. la'r)p~rttar, or 33o-c In Tr-,,-Iy 5-III'll, :o 5 (17) 1~11C (11'1~-13-7) SO: U-3039, 11 "ar 1953 KLINOVA,X.V -prof .;SOLOV IYNV,V.F.;ARTTUNOVA,N.M.; POPOV,P.G. YASTREB(NAL.A.; BAMIN,V.P.; KCPYLOVA,Te.K.;TBCDCROVICH,G.I., red~kt2o~7~,Vftf-. A.T., akademik, redaktor; KIRONOV,S.I., akademik, redaktor;ALIM, M.j(.. redaktor; AXHMOW,G.A., redaktor; VARXIMN.M.I., redaktor; DMITRIYBV,Ye.Ya., redaktor; DOMOPOLOV,N.N., redaktor; ILIIN,A.A.. redaktor; MIMIM Sh.Y., redaktor; MOZESON,D.L., redaktor; FUSTO- TAIM,L.V., redaktor; FOMIN,A.V., redaktor; HOSOV,G.I., redaktor; KISKMA.A.A., tekhnicheakiy redaktor [Recent sediments of the Caspian Bes,] Sovremennye osadki Kaspiiskogo morla;-_Moskva,, Izd-vo Akademii nauk SSSR, 1956. 302 p. (MIRA 9:3) 1. Deystvitellnyy chlen AN AzSSR (for Aliyev) 2. Chleu-korrespo~dent AN SSSR. (for Varentsov, Pustovalov) 3. Ilachallnik morskogo otryada Azerbaydzhanskoy neftyanoy ekspeditsii SOPS AN SSSR (for Klenovs.) (Caspian Sea) li . ~ - 1 Cjz 1,143 I R AUTHORS: Ravich, M. I., Yastrebova, L. F. SOV/78-3-12-27/36 TITLE: The Phase Equilibria in the System Na 3P0 4-Na2so 4-H20 at 2500 (Fazovyye ravnovesiya v sisteme Na 3 PO 4-Na2 so 4-H20 pri 2500) PERIODICAL: Zhurnal neorganicheskoy khimii, 1958, Vol 3, Nr 12, pp 2771-2780 (USSR) ABSTRACT: The solubility of the system Na 3PO 4-Na2 so 4-H20 at 2500 as well as the solid phase which forms at this temperature were in- vestigated. Two phases with varying composition were found. The a-phase contained 24-45% Na 2 so 41 and the P.-phase contained 0-15% Na2 so 4' The a-phase is characterized by the refractive index, which varies with changes in composition from 1.480 (37% Na 2so 4) to 1.489 (24% Na 2so 4) . The P-phase is anisotropic and is characterized by its refractive Index, which also varies with the composition: N = 1.489 and N = 1-494 (at 15% ,, p . 1.495 and N = 1,510 (in the absence of Na 2S0 ) and N Na2so 1 4 4 g p The X-ray studies made show that the two phases belong to Card 1/3 different crystai systems. From the radiographs it is apparent SOV/78-3-12-27/36 The Phase Equilibria in the System Na 3PO4 -Na2 SO4-H20 at 2500 that for the a-phase a change in composition leads to a con- version to Na 3PO 4* The thermograms cf the a- and P-phases show thermal effects which correspond to the dehydration. In the dehydration the a-phase remains isotropic, although the refractive index decreases down to -1-46o-i-471. In the de- hydration of the P-phase (with more than 10% Ila 2so4) this phase also becomes laotrapio. The X-ray studies of the isotropic samples, prepared by dehydration of the a- and P-phases, are practically identical and do not differ from the X-ray pictures of the non-heated phase. In the crystallization of the a-phase no excess of alkali was found, but, on the contrary, with the crystallization of the P-phase Ila 3 PO4Na 2S04 9 and Na2 HP04 crystallized out simultaneously. With an increase in the Ila2so4content the amount of Ila 2HPO4in the solid phase becomes less and the alkalinity of the liquid phase decreases. With a Na2so4 content of 14% the amount of Na 2HPO 4 present is zero. From the results obtained it follows that the sodium phosphate Card 2/3 and the BOCUUM sulfate form two double salts, the isotropic SOV/78-3-12-27/36 The Phase Equilibria in the System Ila 3P0 4-Na2so 4-H20 at 2500 a-phase and the anisotropic P-phase. There are 10 figures, 3 tables, and 9 references, 6 of which are Soviet. SUBMITTED: November 20, 1957 Card 3/3 5(2), 5W AUTHORS: Ravich, M1. Lp Yastrebova, L. F.__ SOV/78-4-1-32/46 TITLEs On the Solid Phanes Cryatalliztng In the Na 110 -Va SO If 0 3 4 2 4- 2 System at High -'emperatures (200-3500) (0 tverdykh fazakh, kristallizuyushchikhsya v sisteme Na 3PO 4-Na 2S0 4-H20 pri vysokikh temperaturakh (200-3500)) PERIODICALs Zhurnal neorganicheskoy khimii, 1959, Vol 4, Nr 1, pp 169-181 (USSR) ABSTRACT: The heterogeneous equilibrium in the Na 3 PO 4- Na2 SO4-H20 system 0 0 was investigated at 200, 300, and 350 . At 200 the solubility of Na.3PO4 is higher than at room temperature. In this system the isotropico/- phase and the anisotropic P phase 0 0 phase of approxi- crystallize at 200 and 250 At 200 the mately constant composition (14-15% Na2SO 4 is an almost pure anisotropic double salt. The.solid phases were investigated by crystallo-optical, radiographic, and thermographic analyses. At 2000 there is no Na 2 HPO4compound in the P phase. The Card 1/3 results show that at temperatures higher than 210 0 the On the Solid Phases Crystallidng in the Na PO - SOV78-4-1-',12/45 3 4 0) -Na2 so 4-H20 System at High emperatures (200-350 anhydrous Na 3P04 salt is crystallized from aqueous solutions of Na PO . At temperatures lower than 210 the semihydrate 3 4 Na 3 PO 4' 1/2H 20 crystallizes. The semihydrate does not form solid solutions with Na 2HPO 4' At 3000C the same solid phases crystallize as at 250 0: Na 2so 4) o~. arid ppha'se. In the 0 phase the amount of Na 2HPO4SO is reduced in the same way as at 250 0 with an increase in Na 2s04 content; and with 14-15 wt.% Na 2s04 there is no more Na,EP0 4* The existence of theo": tj .,AUTHORSt 'Andreyev., V..A.; Kl shchel, T. F j Tastrebtaev,.,~. iloyp F.': j .1 ORGt none LW TITLE.-)~Machine for loadingp,transfer, and unloadinZ of long loads. Class 63j 5~ No. 17W20 &nnounced by Komi State Dep~g and Scientitic Research Institute of Forestry (Komi gosundarstvennyy proyektnyy i nauchno-issledovatellskiy inatitut lesnoy promyshlonnosti)7 SOURCE: Byulleten' izabreteniy i t6varnykh znakov, no. 20, 1965~ 126 TOPIC TAGS-. automation equipment, transportation equipment, transportation equipment industry, material handling ABMACT t This Author Certificate presents a machine for loading, transfers and unloading of long loads$ consisting of a self-powered chassis and an attachment containing a powered frame which can be rotated in the vertical plane and which has load-gripping arms (see Fig. 1). To permit changing the location of the rotating frame and to improve the stability during load transfer.- power cylinders 03490.377.o1:621.868.238.6 L 9791-66 AGO NRs AP5028533 0. 16 Fig. 1. 1 Rotating frame; 2 - self-powered chassis; .3 - power.cylinder; h - carriage; 5 - clamping arms 2 9 are-pivoted under the frame at the rear of the chassis. The piston rods of the 0 1 -frame. The load-grippin cylinders are connected through.pivots to the rotating 9 device consists of a carriage with a clamping arms The carriage can translate along the rotating frame. Orig. art. has: 1 figure. SUB CODEt 131 SUM DATE: 3oju:L64 KAVENSUT, Mikhail Anm,--;I--Ak- OFENGPX*DLT, Alir"i Vikhaylovich; FOYNISS, YASTEERMV, lo~;Af Fedor~wieh [Open-hearth furnace hearth bottom] Pod;-na r-artenovskoi pe:!hl. Moskva,, Metallurgi.la. 1965. 88 p. (MTRA 18.7) YASTUBTSEVP V. M. KOSOMOV, Nikolay Yvacheslavovich 61j Mlekbanizatsiya Ucheta Ila Sudostroitellnom kredpriyatii (mechanization of accounting in shipbuilding enterprises, by) N. V. Kosovanov i V. N. Yas- trebtsev. lzd. 2. Moskva, lzd-vo I'RecMoy Transport", 1956. 126 F. Illus., Diagrs., Tables. J. z4 V 1948 Oncillatorsp Transitron Oscillations- Relaxation "StuAy of a Relaxation Oscillator of the Tranaitron Types" V. V. MIgulin and T., N. Yactrebtso-ra, Sai R,5s Inst of Pbys, Moacov'State U, 12 pp "Zhu'r Tekh Fiziki" Vol ZYMp No Reports trVerimental study of-tranaltron oharaoter- 16tics of-62h7 -tube, and7,*a:rIcus-performanoeis ofRS- oscillator vorking on this tube. quaitative exami- nation of processes In a similar system gireo results in agreement with experiment. Submitted 24 NOT 1947. 75T34 IME T. t! it 12 ("cot"' Oltler or TC,nin ~.,So - f~i,-, 117"'l- Dis ffZlla~~jf -qCL#-)fC-L- scicnC0 nm(! SO: SAL,71. ),!'0 a rj) 0 r: Card 1/1 Author Title Periodical Abstract Institution Submitted ~vigatiori FD-2676 Pub.' 90-8/12 : Yastrebtseva) T. N., and Galkin, 0. P. : A method of damping the natural oscillations of quartz Radiotekhnika, 10, 69-73, Jul 55 : The problem of damping quartz crystal oscillations arises from the necessity of obtaining exact calibration marks on radar range in- dicators, when radiated pulses lack strict periodicity. An ex- perimental investigation is described of a rapid method of damping natural oscillations of quartz (Q of several teas of thousands and frequency 8xio5 cps), by connecting the electrodes of the crystal to the input of a negative feedback circuit at the right"time. In the experimental apparatus natural oscillations were shifted 1800 and fed into the feedback channel (for which an amplification factcr of 700 was chosen), producing full damping in less than 100 cycles. Diagram, oscillograms. One English reference. June 26, 195k F_ b-T S V_V fj N SUBJECT USSR / PHYSICS, CARD I / 2 PA - 1494 ~AUTHOR JASTREBOEVAIT.N., AKOPJAIT,I.G. ,_TITLE ..Tbe.,11nvestigation of the Impulse Excitation and Forcible tz,Oscillations. Extinction of Quai ~PERIObICAL Radiotechnika, 11, fase. 9, 39-45 (1956) Issued:' -.10 / 1T56 reviewed: '11 1956 Uodern impulse technique makes use.of installations which generate the electric time scale..Here.the accuracy with which time is measured is determined by the stability of the generator of the scale Graduations. Several works deal with the conservation of scale graduations by means of a quartz resonator. In view of the fact, however, that hitherto such works have been characterized by a number of defects, the present work is devoted to a theoretical and experimental examina- tion of the impulse excitation of quartz oscillations as well as of some methods ,of forcible extinction. A complete solution for excited oscillations was found for the case in which a signal with rectangular impulse acts upon quartz. The optimum duration of the impulse, in the case of which the excited oscillations have the greatest amplitude and the lowest number of higher harmonies, is determined. Four methods of forcible extinction of quartz oscillations were investigated: a) furnishing quartz with an active shunt-resistanoe, b) extinction in a scheme with negative feedback coupling, c) extinction by means of an equilibrium scheme, d) impulse extinction. It was found that, with the help of the two first mentioned methods, the extinction of the quartz oscillations can be raised by only one order. Computations and experiments carried out by means of an equilibrium scheme have Catepry iUSSR / Radio Physics. Generation and Conversion of 1-4 Radio-Frequency Oscillations Abs Jour :Ref Zhur - Fizika Ho 3, 1957, No 7271 Author :Yp~qti~qbtsp ya, T.N., Akopyan, 1,G. Title :Investigation of Shook Exoitation and rorced Quonchin- of Quartz Oscillations, Orig Pub :Radiotekhnika, 1956, 11, No 9, 39-46 Abstract :A theoretical and experimental investigation of shook excita- tion of quartz is described. A comDlete solution is obibained for excited oscillations in the Gaze of a stop signal and a rectangular pulse actin:r on the quartz. The optimum duration of the pulse under which the excited oscillations have maximum amplitude and a minimum of harmonies is establixhed. Four me- thods of forced quenching of the quartz oscillations are in- vesti.rated: shunting the quartz by an active resistance, quen- ching in a negative-feedback circuit, quenching-witi the aid of a balanced circuit, and shock, quenching, It is ostablis~od that the first t-uo methods can increase the attenuation of the Card 1/2 - 19 Category : USSR / Radio Physics. Generation and Conversion of 1-4 Radio-Frequency Oscillations Abs Jour : Ref Zhur Fizika No 3, 1957, No 7271 quartz only by one order of magnitude. Calculations and oxpe- riments on quenching of quartz vrith the aid of the balanced circuit proposed in this article have shovm that this method can increase the attenuation of the oscillations by a factor of 4 10 . In addition, by a pemanontly connected feedback loop it is possible to reduce artificially the 0. of the quartz to any required value. The balanced circuit developed for the excita- tion and quenching of quartz oscillations is suitable for prac- tical use. Card A 20 109-9-7A5 AIPMR: Yastrebtsevat T.N. ,TITLE: Analysis of a Bistable WltivibratOr.ftplOYing Junction Transistors (Anaill spuskovoy skhemW na ploskOstnfth pauprovodnikovkh triodakh) PARIODICAL: Radiotekhnika i Flektronikat 1957t V01'.II? Nr 9V pp.1146,- 1156-(USSR)- m a AIPTHACT: The multiVibratOr considered is of the grounded e itt r type (see Fig'.1)'. positive triggering pulses are applied through crystal diodes to the base electrodes of the tran istors. Firsto the static analysis Of 'the system is carried out'. For this purpose the equivalent circuit of the multi- vibrator is as shown in Fig'.2'. Operating currents and volt- ages of the circuit are determined under the following assto- tions: (1) the.collector potential of a oonduoting trans- istor is,very near to zeroy.(2) the base potential of a con- ductixg transiptor is very near to zeroo (3) the initial emitter and oolleOtOr OUrzents of a nonconducting transist6r are negligiblej and (4) the collector and emitterresistances (rk and are much higher than .Rk, ELO and JR6'. The 109-9-7/15 Analy sis of a Bistable Ifultivibrator Employing Ju tion Tran istors. referring to Figs. 1 and 2. 'Aiialysis of the transient pro- cesses or changeover of the multivibrator is 'carried out by' means of the equivalent circuit shown in Pig.4. The change- over from one stable state to the other, upon the application of an external trigger pulse,, is investigated by splitting the processes into a number of stages. During the first stage a triggering pulse is applied to the base of the conducting transistor. During the second stage the nonconducting tra-n - istor is being gradually opened as a result of the feedback and the disappearance of the triggering pulse. -Both trans- istors are conducting during this stage but one of them is being gradually closed while the other is being gradually opened. During the last stage the transistor which was pre- viously conducting is fully closed. Analytical expressions describing the operation of the system in the first 'and the third stages are given (see Eqs'.(13), (17) and (21)) and an equation for the rise time of the leading edge of the collector current pulse is found (see Eq.(22)). The above expressions are rather complicated but they can be employed in practical calculations. The theory was checked on a symmetrical multivibrator employing two Soviet typeII66 a transistors and was found to give values for the rise times -Card ?/3 109-977/*15 Aralysis of a Bistable Vultivibrator Smploying Junction Transistors. which were accurate to within 20%. There are 3.0 figuresp out of which there are 3 sets of oscillogramsp and 2 non, Slavic references. ASSOCIATION: Physics Faculty of the Mosoow State University , M Fakul'tat Mookovskogo Gosu- m. V.- Lomonosov (Fizicheski j darstvennogo Universitata im. W.Lomonosoya). SPMTTED: March It 1957. AVAIIA=: Library of Congress. _qard 3/3 YASTREBTSEA Investigating the process of the Rjumpu in self-oscillating relaxation circuits. Veat.Mosk.un.Seremateomekhop astrons,fiz., khim. 12 no.3:95-101 157. (MIRA 11:3) l.Kafedra kolebaniy Moskovskogo gosudaratvennogo universiteta. (Oscillators, Electro-tube) (c Is mo 22 woe) C..Wk-. IL IL %"-" W-ft W"- A. 30L fp- p- WX V. Wft L & NI- L IL 1- 0 :r-. ..&-- I.- man AL A. AA... (c 18 Ao 22 qums) -- --. a UL OL A-.~ . - "- . -4 .-q& A. IL C-,o.% IL A. ft- C. OL qj- my- 11 Now (c 145 ~.Cm) wpm VA.%Ws at w0 D.SwAls %sty cc seaw smatimmortme we llow%rW" ommmwmlam%l~ Is. A. S. F"m ("am), moon, IF 77777 BENDRIKOV. G.A.; KRASNUSHKIN, P.Te.; REYKHRUMMI, B.M.; POTEMKIN, Y.Ve; MUSTXLI, Te.R.; RUMIN, K.S.; ITAHOY, I.Y.; KHARLAMOV, A.A.; TIKHCUOV, Tu.V,; STRZUOVA, L.P.; KAPTSOT, L.H.; ORDANOVICH, A.Te.; KHOKELOY, R.V.; VOROHIN, B.S.; BERESTOVSKIT. G.9.; KRASHO- FZVTSEV. Tu.V.; MINAKOVA, I.I.; TASTREBTSEVA, T.M.; SEMMOV, A.A.; VINOGRADOVA, M.B.; KAFXEYEV, G.A'--'DRACHW"-I;.-A'.'; TROPIMOVA, N.D.; SIZOV, V.P.; RUMIN, S.H.: VMIZHANIVA, K.A,; NESTEROV, V.S.; SPIVAK, G.V., red.; NOSTREVA, I.A., red.; GBORGIUVA, G.I., takhn. red. [Special physics precticum] Spetsialinyi fizicheskii praktikum. Moskva, Izd-vo Kosk.univ. Vol.l. (Radio physics and electronics) Radiofizike i elektronika. Sost. pod red. G.V.Spivoka. 1960. 6oo p. (MIRA 13:6) 1. Professorsko-propodavateltakly kollektiv fizichaskogo fakullteta Mookovskogo universitata im. X.Y.Lomonosova (for all except Spivak, Nomyrevao Georgiyeva). (Radio) (Slootronics) S/188/6,-/000/001/011/014 B164/B102 ALVHORS.- Yachukhashvili, G. S., Yastebtseva, T. N. TITLE& -Investigations on- static and trans i ent--oharaot eris t 1-68- of current switches PERIODICALs Moseow. Universitet. Vestnik. Seriya III. Fizika, aetrono-miya, no. 1, 1963, 66 73 TEXT: A current switch circuit with surface alloyed semiconductor triodes, f-s analyzed theoretically and the results are compared with those of experiments. Solving the diffusion equation for free carriers in the triode base taking account of boundary conditions and circuit equations gives analytical expressions for the volt-ampbre characteristics, from the input which the minimum input pulse amplitude for switching and impedance can be obtained. Further the differential equation of the equi- valent circuitis investigated taking account of the frequencyproperties of semiconductor triodes. This equation is solve 'd under some simplifying assumptions. The dependence of the switching time on the triode and circuit parameters is investigated. The teaulto of'theoretical calculations are compared with experiments on a current switch-cirouit with low Card 1/2 S/186/.63/000/001/011/014 Investigations on static and... B164/BI02 frequencylT56 (F5B) triodes. Good agreement is obtained. There are 7 fig- ures. ASSOCIATIONt Kafedra teorii kol.ebaniy (Department for, Theory of Vibrations) SUBMiTTED: June 29, 1962 Card 2/2 MESA ONSOM OHM, -0-M ANN M ACCESSION NR: AP4043802 s/0188/64/ooo/oAgO83/oW AUTHOR: Andronov, Yu. A. ; Anupy*]'d, A. Yu.;Yastrebtseva, T. N.; Gubankov, V. N. T.ITLE:~ Oscillations In germanium samples with point contacts SOURCE: Moscow. UnIversitet. Vestnik. Seriya 3. Fizika, astronomiya, no. 4, 19640 83-86 TOPIC TAGS: germanium, point contact, semiconductor ABSTRACT: The authors present some preliminary results of an Investigation of os- cillat,ilons in nr and p-germanium with plane and point contacts when the samples are connected in a circuit of direct or pulsed voltage. Diagrams of the circuits used for determiiinj oscillations and volt-ampere characteristics are shown.in Fig. I of the Enclosure. The investigated samples of p-germanium had resistivitles of 2, 5, 10 and 70 ohm-cm; the resistivities of the n-germanium were 1, 7, 18, 39 and 53 ohm-cm. The samples were rectangular blocks measuring 1.5 x 2 x 10 mm. in no case were oscillations observed in samples with plane contacts. The'point contacts were made.of wire of various metals and alloys. The ends of the wires were sharpened to a point electrolytically and had diameters of 5-100 11- Contact of the metal point with the Investigated germanium sample was accomplished using a micromantpu- &Sof ~6 Nonlinearity of the volt-ampere characteristic was caused only by the point ACCESSION NR: AP40411802 conta6t. Typidal volt-ampere curves of samples are shown In Figures 2 and 3 of the Encloiure. Ther;curves I correspond to an increase In current through the point con- tact;.curves 2 - to a decrease in the current to zero. On the direct branch of the curve1or n-ge~manium, the segment with negative transconductance is missing. The direct'branch 8f a sample of p-germanium has a segment with negative transconduc. tance'and the curve corresponding to a*n increase in direct current coincides In most cases with the curve corresponding to a decrease In the direct current to zero. In coAtrast toAhe results of earlier published studies, there was no evidence of a region' of osciHations on the inverse branch of the volt-ampere curve of n-germanium In the region W'Ith negative transconductance; no oscillations were observed on the direci,,branch of the volt-ampere curve. In samples of p-germanium oscillations were observed 'only on the direct branch of the curve In the region with negative trans6nductance. The oscillations observed in samples of n-germanium are con- iderably more~istable in frequency and in amplitude than the osciiiations in San-. t s pies of p-gerrr~dnium. Among the metals used in the point contacts were Fe, III, W, ith;Mo, W with Al, Cu, Al, Au with Ga and Pt. In all cases the volt-ampere W wi curves.had the~shapes shown in Figures'2 and 3 and oscillations were observed in all cases. The frequency of oscillations In samples of n- and p-germanium varied, depending on the sample, from 0.1 to 1.5 mc/s. In most cases the frequency of os- cillations.in n-germani,um was lower than in p-germanium. With a decrease In tem- Card 2/6 ACCESSION NR: Ap4o43802 perature~in p-ty0e germanium the amplitude of the oscillations decreased, disap- of -150C. Orig. art. has; 3 figures. pearing:at a te ASSOCIATION: Eafedra fIzIki kolebaniy Moskovskogo universiteta (Department of Vibration Physics, Moscow University) SUBMITTED: 7.4Dec63 ENCL: 03 SUB CODE: EC NO REF SOV: 001 OTHER: 002 Card 3/6'