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This lecture is devoted to the basic physical properties and the calculation methods of the artificial cavitation (ventilation) flows. Main attention is paid to the three-dimensional ventilated supercavities past the disk and blunted cavitators. Derivation of approximate equations of the axially symmetric supercavities with using the theorem of momentum and also the asymptotic theory of slender body is presented. The G. V. Logvinovich independence principle of the cavity expansion is stated and grounded. It gives a simple and general method of investigating the unsteady problems. Calculation of the ventilated cavities has some peculiarities caused by gravity effect presence of the cavitator angle of attack and taking account of balance between the gas-supply into the cavity and the gas-leakage from the cavity. They are discussed here as well., Original contains color plates: All DTIC reproductions will be in black and white. Presented at the Applied Vehicle Technology Panel (AVT) in support of a VKI Lecture Series presented from 12-16 February 2001, at the von Karman Institute in Brussels, Belgium. ISBN 92-837-1074-6. RTO Lecture Series 005. p11-1/11-33 This article is from ADA400728 Supercavitating Flows (les Ecoulements supercavitants)

Control of the supercavity parameters is necessary for maintenance of calculated regime of the supercavitation flow in unsteady conditions: at changing the velocity and depth of the body motion. The problem of cavitation flow control includes the two problems connected among themselves: I)the control of cavity dimensions; II) the control of forces on a cavitating body. We consider sequentially both problems., Original contains color plates: All DTIC reproductions will be in black and white. Presented at the Applied Vehicle Technology Panel (AVT) in support of a VKI Lecture Series presented from 12-16 February 2001, at the von Karman Institute in Brussels, Belgium. ISBN 92-837-1074-6. RTO Lecture Series 005. p14-1/14-29 This article is from ADA400728 Supercavitating Flows (les Ecoulements supercavitants)

This lecture is devoted to unsteady processes in the flows with natural and artificial supercavitation. We consider two classes of phenomena: (1) forced non-stationarity of the flow which is induced by external causes - a model velocity change an ambient pressure impulse a variation of gas supply into a cavity etc.; and (2) self-exited oscillation arising due to internal instability of gas-filled supercavities. Results of computer simulation of the dynamic supercavitation processes are presented. They were obtained by using the approximate mathematical model based on the G. Logvinovich independence principle of the supercavity expansion. A comparison of unsteady behavior of axisymmetric and two-dimensional supercavities is given. Formulation and solution of two 2-D problems are presented: (1) the problem on instability of the 2-D gas-filled supercavity; and (2) the problem on evolution of the 2-D supercavity past an oscillating wedge. The solutions are based on the M. Tulin's linearized cavitation scheme. The lecture material is illustrated by sequences of motion-picture flames and photographs of the unsteady supercavitation processes. They were obtained at the hydrodynamic laboratory of the Institute of Hydromechanics of NAS of Ukraine (IHM UNAS)., Original contains color plates: All DTIC reproductions will be in black and white. Presented at the Applied Vehicle Technology Panel (AVT) in support of a VKI Lecture Series presented from 12-16 February 2001, at the von Karman Institute in Brussels, Belgium. ISBN 92-837-1074-6. RTO Lecture Series 005. p12-1/12-30 This article is from ADA400728 Supercavitating Flows (les Ecoulements supercavitants)

Electrical characteristics (current-voltage and capacitance-voltage) of metal-semiconductor structure based on monocrystals Ag3SbS3 are reported. Studies carried out at the room temperature were shown space-charge limited (SCL) current caused by the peculiarities of Ag3SbS3 crystallographic structure: velocity saturation mode and ballistic regime were observed. Results of the numerical modeling of experimental data are also presented., Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; State Pedagogical Univ. Drogobych, Ukraine; Sumy State Univ. Sumy, Ukraine. Pub. in Proc. SPIE, Vol. 4412 pp211-215, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

For the last ten years or so, the gasketed diamond anvil cell (DAC) has become the standard tool for the generation of high pressures. Compared with the classic hydraulic piston-cylinder devices, a DAC is three to four orders of magnitude less massive, and will generate static pressures one to two orders of magnitude higher than previous devices. In this paper, we attempt to give an understanding of the gasket behavior which will be helpful to the worker requiring routine and reliable use of a DAC in the submegabar pressure range., Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; Phys. and Tech. Institute, NASc, Donetsk, Ukraine. Pub. in Proc. SPIE, Vol. 4412 pp104-109, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

Extensive experiment studies of the IV elements have been made in recent years. Motivations have included the rich variety of phase and structural transitions. Different SiO(2-x) defects can be created in Czochralski grown silicon, Cz-Si, by appropriate pre-annealing at atmospheric pressure (10(exp 5) Pa). Some date concerning the effect of enhanced hydrostatic pressure on creation of defects in the Si- SiO(2-x) system have been reported for defects-containing Cz-Si subjected to cyclic hydrostatic pressure treatment. An attempt to observe the mentioned hydrostatic pressure-induced effect of massive creation of 'new' defects in Cz-Si with oxygen-related defects was undertaken in this work. The increase of defect concentration in the hydrostatic pressure-treated Cz-Si samples with initially present SiO(2-x) precipitates can be considered as a proof of hydrostatic pressure-induced massive creation of defects on before-created oxygen-related defects. However, in the case of some DAC-treated samples, a misfit dislocation network was not directly proved to be created because of too small sample in comparison to the resolution of the spectroscopy and X-ray methods., Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; Phys. and Tech. Institute, NAS, Donetsk, Ukraine; Institute of Physics, PASc Warsaw, Poland; European Synchrotron Radiation Facility, Grenoble, France. Pub. in Proc. SPIE, Vol. 4412 pp110-115, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

The influence of reducing and oxidizing annealing on optical absorption spectra of the yttrium aluminium garnet (YAG) single crystal co-doped with Mg and Cr is investigated using step-by-step isothermal and isochronous thermal treatment in H2 or air flow. The changes in the spectra were analyzed using decomposition on elementary absorption bands of Gaussian shape. The separated absorption bands attributed to the Cr(4+) ions occupying octahedral and tetrahedral sites in garnet lattice demonstrate different behaviour. The analysis allows to distinguish the electronic recharging process Cr(4+)(sub OCT) left & right arrow Cr(3+)(sub OCT) taking place in the octahedral sites of garnet lattice and having lower activation energy from the chromium migration process Cr(4+)(sub TETR) left & right arrow Cr(4+)(sub OCT) happening at higher temperatures or longer exposure. Estimations show that approximately 0.2% of total number of chromium ions occupied tetrahedral sites forming phototropic centers in the YAG: Mg, Cr crystal., Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; Institute of Experimental Physics, University of Gdansk, Poland; Institute of Electronic Materials Technology, Warsaw, Poland. Pub. in Proc. SPIE, Vol. 4412 pp63-68, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

In this work, we present the studies of manganites with superfluous manganese content performed by the magnetic resonance spectroscopy methods. The ferromagnetic resonance (FMR) has been measured on the (La(0.7)Ca(0.3))(1-x)Mn(1+x)O3 films. The symmetrical FMR line in paramagnetic phase has the Dysonian-like shape below T(sub c). The FMR linewidth increases abruptly near the transition temperature. By comparing resonance fields oriented parallel and perpendicular to the film plane, the easy axis of magnetization was determined to be perpendicular to the film plane. In the perpendicular magnetic field, the spin-wave resonance (SWR) spectrum consisting of seventeenth of spin - wave modes has been observed in the La(0.7)Mn(1.3)O3 film. Two of them observed on the high-field side of SWR spectrum are connected to a surface modes. The others are the bulk nonuniform spin-wave modes. Based on a study of temperature and angular dependencies of SWR and FMR spectra, the spin-wave stiffness, g-factor and exchange constant were established. An analysis of the Mn-55 NMR spectrum in La(0.6)Sr(0.2)Mn(1.2)Cr(0.2)O3 has shown that a wide asymmetrical line can be uniquely expanded into four components with different resonance frequencies. There are manganese ions, which ionization states are close to (3+) and (4+), as well as the Mn ions with intermediate valence resulted from the high-frequency electron exchange., Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; A.A. Galkin Donetsk Physico-Technical Inst. Ukraine. Pub. in Proc. SPIE, Vol. 4412 pp272-275, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

Magnetic ordering of Dy(3+) ion in low-dimensional magnet CsDy(WO4)2, (CsDyW) has been first studied by means of measurements of the low temperature specific heat over a temperature range of 0.5-23 K. The ordering temperature (T(sub N)) of the Dy(3+) sublattice was established to be 1.34 K. The experimental data indicate on the antiferromagnetic (AFM) character of Dy(3+) ions interactions. The magnetic behavior above and below T(sub N) is discussed in the framework of different theoretical models., Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; A. A. Galkin Donetsk Physico-Technical Inst. Ukraine. Pub. in Proc. SPIE, Vol. 4412 pp268-271, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

We report on the pressure, field and temperature dependencies of magnetization and resistance in manganites of (La(1-x)Ca(x))(1-y) Mn(1+y)O3 type. The M(T) dependencies is established to exhibit the following peculiarities: the first is connected with the paramagnet (PM) -ferromagnet (FM) transition at 267 K; the peak of M(T) dependence at 263 K is presumably due to an existence of AFM clusters; an anomaly in magnetization (as well as in susceptibility) is connected with the FM - canted phase transition at 42 K and the large irreversibility in the field-cooled and zero field-cooled magnetization. As field is increased above 200 Oe, the sign of the M(T) anomaly changes , namely, the M(T) magnetization increases with increasing field at 42 K. The character of M(T) dependencies does not change under pressure. However, both the Curie temperature, T(sub c), and the resistance peak (T(sub maxR)) corresponding to metal-insulator transition shift in the direction of high temperatures with increasing pressure. A pressure stabilizes the ferromagnetic metallic phase. The temperature of the FM - canting phase transition does not change under pressure. The magnetoresistance effect increases by 15% under pressure of 12.6 kbar. The linear increasing of T(sub c) with the derivatives of dT(sub c)/dP approx. + 1.5 K / kbar in (La(0.7)Ca(0.3)(0.,8)Mn(1.2)O3 and dT(sub c)/dP approx. + 1.9 K / kbar in La(0.6)Mn(1.4)O3 ceramics was observed at pressure up to 10 kbar. The T(sub maxR), Prepared in cooperation with the Polish Society for Crystal Growth, SPIE-The International Society for Optical Engineering in association with SPIE Poland Chapter; A. A. Galkin Donetsk Physico-Technical Inst. Ukraine. Pub. in Proc. SPIE, Vol. 4412 pp276-279, 2001. This article is from ADA399287 International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals Held in Zakopane, Poland on 9-12 October 2000

Young's modulus, linear thermal expansion coefficient, stress, microhardness, wear resistance, adhesion and cohesion strength for thin films of As2S3, As2Se3, Ge28Sb12Se60, Ge33As12Se55 and Ge36As4S60 chalcogenide glasses thermally deposited onto unheated zinc selenide substrates have been determined. The interrelationship between mechanical parameters of the films has been studied. Wear resistance of chalcogenide films has been found to be related to the adhesive force and mechanical parameters used in the formal theory of glass strength. The effect of the additional stress arising in result of the temperature increase under friction on the wear resistance of the films has been shown., Published in Jnl. of Optoelectronics and Advanced Materials, v3 n2, Jun 2001. p491-498 This article is from ADA398590 International Workshop on Amorphous and Nanostructured Chalcogenides 1st, Fundamentals and Applications held in Bucharest, Romania, 25-28 Jun 2001. Part 1

In this work is presented the research on thin films of chalcogenide glassy semiconductors as the medium for relief holograms record. The optimization of photoresist has allowed for an essential rise in sensitivity to light. As(50)Se(50) photoresist composition on which above thousandfold chemical amplification of holographic record is achieved, was used. Diffraction gratings in range of spatial frequencies 600 - 2400 mm are submitted. For natural light the magnitude of diffraction efficiency exceeds 70 - 80 % at measurements in autocollimator conditions. The probable cause of differences between continuous and pulse irradiation of thin films of chalcogenide vitreous semiconductors is discussed., Published in Jnl. of Optoelectronics and Advanced Materials, v3 n2, Jun 2001. p389-394 This article is from ADA398590 International Workshop on Amorphous and Nanostructured Chalcogenides 1st, Fundamentals and Applications held in Bucharest, Romania, 25-28 Jun 2001. Part 1

The method of blazed holographic diffraction gratings fabrication by transformation of an original symmetric grating grooves into asymmetric ones using inclined vacuum deposition of silver and additional chemical etching have been developed. As photoresist material for gratings recording light-sensitive chalcogenide glassy As2Se3 layers were used. The shape of grating grooves was determined with an atomic force microscope. Angular and spectral dependencies of the diffraction efficiency of the gratings were found, and a relation between optical features and the grating surface pattern was analyzed., Published in Jnl. of Optoelectronics and Advanced Materials, v3 n2, Jun 2001. p383-388 This article is from ADA398590 International Workshop on Amorphous and Nanostructured Chalcogenides 1st, Fundamentals and Applications held in Bucharest, Romania, 25-28 Jun 2001. Part 1

The nature of coordination defects in chalcogenide vitreous semiconductors of As-Ge-S system have been analyzed before and after gamma-irradiation using the results of positron lifetime measurements. The correlations between the positron lifetime data, the structural features and the chemical compositions of glasses have been established. The identification of negatively charged point defects has been carried out., Published in Jnl. of Optoelectronics and Advanced Materials, v3 n2, Jun 2001. p329-332 This article is from ADA398590 International Workshop on Amorphous and Nanostructured Chalcogenides 1st, Fundamentals and Applications held in Bucharest, Romania, 25-28 Jun 2001. Part 1

Changes of optical transmittance induced by the influence of 60Co gamma-irradiation have been studied in ternary As-Ge-S, Sb-Ge-S, As-Ge-Se and As-Bi-Se systems. The characters of radiation-induced optical effects in all these systems have been compared It was shown that the compositional dependencies of such effects are almost linear for stoichiometric glasses and reveal some peculiarities connected with phase features, the "free volume" parameters and the specificity of radiation induced defects formation for non-stoichiometric families., Published in Jnl. of Optoelectronics and Advanced Materials, v3 n2, Jun 2001. p232-327 This article is from ADA398590 International Workshop on Amorphous and Nanostructured Chalcogenides 1st, Fundamentals and Applications held in Bucharest, Romania, 25-28 Jun 2001. Part 1

The Final Proceedings for Advanced Ceramic for Third Millennium, 29 October 2001 - 2 November 2001. This conference covered the following topics: Section A - Ceramic powders: (1) modeling; (2) synthesis; (3) production processes; and (4) ecological problems. Section B - Modern processes for manufacturing ceramic products: (1) modeling; (2) compaction; (3) sintering; (4) treatment; (5) joining; and (6) ecological safety. Section C - Structural ceramics: (1) properties; and (2) industrial application. Section D - Functional ceramics: (1) properties; and (2) industrial application. Section E - Bio-ceramics: (1) reality and perspectives. Section F - Advantages of building ceramics: (1) properties, and (2) securing of ecological safety of production processes and application. Section G - Modern techniques for control and testing of ceramics. Problems of standardization.

Conference papers discuss new types of welded structures, applications of advanced structural materials, optimization of structures, automated computation and design methods, theoretical and experimental studies of stress-strain states, methods for improving reliability and extending service life and more.

The U.S. Army has faced many formidable decisions on how best to transform. The fundamental changes in the strategic environment after the Cold War, crucial advances in technology and military doctrine related to the Gulf War and permanent involvement in peacekeeping/peacemaking operations around the world have led to a more flexible and lethal force structure. An army should maintain the capability for conducting various military operations from small-scale contingencies to major theaters of war. Therefore, based on major changes in the strategic environment-a dismantled Warsaw Pact, increasing asymmetrical threats, budget constrains along with frequent involvement in contingency operations-the U.S. Army once more confronts transformation and reorganization. This thesis focuses on the current transformation of the U.S. Army to examine the history of reorganizing the U.S. Army along with the dynamics of reforming the Ukrainian Army. This thesis explores why a 'medium-weight brigade-size' force structure became the key feature of the U.S. Army's transformation strategy for forces of the 21st century namely, the 'Objective Forces'. The main intention of this thesis is to reach conclusions about how the U.S. Army's transformation experience can be applied to the current process of developing the Army of Ukraine.

The temperature dependence of the recombination dynamics of excitons was investigated by time-resolved photoluminescence spectroscopy in direct-gap GaAs/AlAs superlattices. Peculiarities of excitonic photoluminescence decay were established in the dependence of the well width. In particular it was shown that a reduction of the well width results in faster exciton recombination due to an enhancement of interface influence., This article is from Nanostructures: Physics and Technology Intl Symposium (8th), p. 272-275 This article is from ADA407315 Nanostructures: Physics and Technology International Symposium (8th) Held in St. Petersburg, Russia on June 19-23, 2000 Proceedings

Also referenced as report no. CSP-00-5084. See also Volume 2, AD-A396 820.

This is Volume II of the final Conference Proceedings of the International Conference on Mathematical Methods in Electromagnetic Theory (MMET 2000) held in Kharkov, Ukraine on September 12-15, 2000. Topics covered include theoretical and applied aspects of: antenna theory, asymptotic methods, particle beams, complex media, computational techniques, eigenvalue problems, electromagnetic theory, fiber optics, function-theoretic methods, gratings and frequently, inverse problems, lasers, linear accelerator models, nonlinear phenomena, open wavelengths, plasma and waves, radomes, remoting sensing models, waveguide circuits and CAD and more., See also Volume 1, AD-A383 855. Also referenced as rept. no. CSP-00-5084.

This volume contains abstracts in Russian with their English translations for papers presented at the International Conference on 'Welded Structures' held in Kiev, Ukraine in October 2000. Conference session topics include: strength of welded joints; quality control, technical diagnostics and evaluation of residual life of welded structures; technologies, equipment and materials for welding, surfacing, brazing, cutting and coating; and, certification of products of welding industry and attestation of specialists., Text in Russia, abstract in English and Russia.

The U.S. and NATO pursue close relations, bilaterally and multilaterally respectively, with Ukraine, and Ukraine wants substantive and close relations in return - while recognizing the importance of constructive relations with its eastern neighbor. Given the pressures from both East and West, Ukraine's leaders have performed an admirable balancing act - perhaps the only realistic course given the circumstances. While Ukraine's relations both with the U.S. and NATO have made great strides since 1991, putting substance into its relationships with the West has been difficult and spotty at times, particularly in certain sectors. Further, Ukraine's slow progress in reforming its economy and defense establishment has proven frustrating to western policy makers and institutions. Though this paper focuses on major aspects of NATO-Ukraine relations, it should be remembered throughout that the U.S. is a NATO Ally, and has often been primus inter pares for Ukraine-related issues. This paper aims to provide a fresh look at the development and character of NATO/Ukraine relations, particularly aspects in the security/military realm.

The development of the Armed Forces of Ukraine and transition to the professional basis of recruitment of military units pose the specific demands to psychophysiological and moral-psychological condition of the officers. The process of reforming the Armed Forces of Ukraine, one element of which is the reduction of the number of servicemen while still maintaining adequate defensive capability of the country should be implemented by using the science-based methodology of studying and practical application of the "human factor" concept, its role and place in estimation of fighting capability of military units. Obviously, the further perfection of battle systems and facilities should be connected to psychophysiological provision of training and battle activity of the troops. In order to accomplish these goals, a system of professional selection of the officers was established in the Armed Forces of Ukraine., Presented at the Workshop of the RTO Human Factors and Medicine Panel (HFM) held in Monterey, USA, 9-11 November 1999. This article is from ADA387133 Officer Selection (la Selection des officiers)

The end of the Cold War has presented the free world unique opportunities to create new order and security in Europe. The U.S. National Security Strategy advances the notion that global integration will bring stability and it advocates the use of military engagement activities to promote democracy and build relationships with nations that were once our former adversaries. Developing the trust and confidence of both political and military institutions are key to the promotion of democratic ideals. The National Guard's State Partnership Program is an engagement tool that exemplifies the democratic process through the citizen-soldier and their connection to the heart of America's communities. The involvement of the National Guard in helping new nations build democratic institutions is a sound concept that capitalizes on the strengths that Guard members bring through the combination of their military and civilian acquired skills. The reserve component model also offers emerging nations an economical alternative to more costly active forces and conveys a non-threatening defensive posture to their neighbors. The utility of reserve forces in providing military support to civil authorities during emergencies is another benefit demonstrated through partnership engagement activities. The military and civilian contacts conducted through the State Partnership Program offer great potential for building relationships that promote regional stability while providing the Guard opportunities for overseas deployments in a coalition environment. This paper will examine the California National Guard's partnership with Ukraine under the U.S. engagement strategy and the benefits associated with this national security objective.

ICCAT99 had over 200 contributed papers, grouped in topical areas about: - General antenna theory - Reflector, lens and hybrid antennas, - Antenna Arrays, - Adaptive Antenna Arrays, - Low Gain antennas, printed antennas and antennas for mobile communications,- Broadband and multifrequency antennas, - Computational methods, - Antenna measurements, - Microwave components and circuits, fiber optical links, - Industrial and medical applications of microwave technologies.- Electromagnetics in high schools. - See http://www.stel.sebastopol.ua/rt sevqtu/icatt99.htm for a general conference overview. The conference organizers include the National Antenna Association of the Ukraine, the National Technical University of Ukraine "Kiev Polytechnic Institute", IEEE AP/MTT/AES/ED/LEO/GRS-SS Joint Chapter, and Sevastopil State Technical University.

This report results from a contract tasking R&DCFM, National Academy of Sciences as follows: The Objectives of the proposed research work are 1) Development of the fundamental ideology of the flow control (according to the Contract F61775-98-WE123) based on the generation and maintenance of a dominant type of a vortical structure (coherent vortices) with chosen values of parameters correlated with the basic flow parameters "homeopathic treatment" formula; 2) Extension of the proposed boundary-layer control method using specific temperature distribution over a surface (e.g. due to the streamwise heated strips regularly spaced in the transverse direction) to a wider range of practice applications, such as jet-flows attached to a wall of an arbitrary geometry; and 3) Studies of basic mechanisms of the vortex dynamics and essential characteristics of the evolving flow structure under the generation of large scale coherent vortices (velocity profiles, spectral and integral characteristics).

This report results from a contract tasking R&D Bureau Or the Institute for Low Temperature Physics and Engineering as follows: The contractor will investigate unique approaches to accelerated testing of space cryogenic cooler technology.

This report results from a contract tasking R&DCFM, National Academy of Sciences as follows: The contractor will perform research which should support design of a new type of surface arrangement aimed to induce and maintain streamwise vortices to satisfy in a best way the requirements of optimal flow control (delay of separation/laminar-turbulent transition or enhancement of heat transfer) and at the same time to be technologically realizable and operationally convenient.

The Final Proceedings for International Workshop on Laser and Fiber-Optic Network Modeling, 25 May 1999 - 25 May 1999. This is an interdisciplinary conference. Topics include solid-state physics, semiconductor physics, fiber-optics components and networks, nonlinear effects in active and passive optical devices, dispersive media and beam propagation in optical waveguides, modelling of physical processes in semiconductor, solid-state, and gas lasers, new coherent optical sources for the systems of transmission, storage, and analysis of information.

The objective of thesis is to determine the needs of the Ministry of Foreign Affairs of Ukraine and design an appropriate information infrastructure. Choosing the best solution for this government organization requires an indepth understanding of the methods and technologies available and the organizational problems and needs in conditions of the deep economical crisis in Ukraine. This thesis evaluated existing information systems, and reviewed the current architecture and problems. Research includes a detailed analysis of intranet technology, virtual private networks, secure messaging system and the development of a feasible solution for this government organization.

The density of states for a pair of disordered tunnel-coupled 2D electron layers in the quantum Hall regime is calculated. The interplay between the scattering-induced broadening of the Landau levels and tunnel-induced hybridization of the electron states is demonstrated. The conditions for the tunneling gap, when a single Landau level splits in two levels, are expressed through the parameters of the system. It is shown that even a symmetrical double-layer system in a strong mgnetic field acquires a substantial dipole moment due to interlayer asymmetry of the disorder., Pres: 6th Int Symp Nanostructures: Physics and Technology, 22-26 Jun 1998. p136-139. This article is from ADA406591 Nanostructures: Physics and Technology International Symposium (6th) held in St. Petersburg, Russia on June 22-26, 1998 Proceedings

This report results from a contract tasking Kiev Taras Shevchenko National University as follows: The contractor will determine the relationship of phase characteristics between TeO2 and GaAs cells with their constructive and technical parameters. Design a Braggcell TeO2 with minimal phase distortions operating near 100 MHz. Experimentally investigate the phase characteristics for a Bragg cell on TeO2. Thus, the basic results of the work are as follows: 1. A Bragg cell in a heterodyne (coherent) signal processing system does not insert any appreciable phase distortions into an output signal unless a photodetector size is less than a light spot one. 2. Otherwise, such distortions can offer and be appreciable causing an unavoidable frequency dependent phase noise and a dynamic range reduction. 3. In testing optical systems a Bragg cell wave-front distortions can cause a deterioration of system parameters. From the aforesaid follows that further experimental investigations using a photodiode array are useful and necessary to learn vividly real limitations of considered opto-electronic system application., "The original document contains color images"

This report results from a contract tasking Institute of Semiconductor Physics as follows: The contractor will investigate the ESR spectra of n-type 6H SiC over wide temperature and concentration ranges to establish the number of residual donors inherent in the 6H SiC polytype and their energy characteristics.

This report results from a contract tasking V. M. Glushkov Institute of Cybernetics, National Academy Sciences Ukraine as follows: The contractor will develop a method for discretization of quantitative data to improve computer prediction of new materials with predefined properties. Develop a software system implementing the method proposed in the above. Abstract Methods of data preprocessing for computer prediction of new materials are described. The methods result in formation of the attribute set that is used for materials description. The algorithm of transformation of quantitative attributes into nominal ones (discretization algorithm) is considered in details. It is implemented as a program which is supplied by a USER'S MANUAL.

This report results from a contract tasking Institute of Semiconductor Physics, National Academy of Sciences, Ukraine.

This testimony describes the events surrounding the sales of high performance computer's to Russia's nuclear weapons laboratories. Some of the issues discussed include; the Comprehensive Test Ban Treaty (CTBT) and its implications for exports to Russia, US export regulations as they apply to Russian nuclear laboratories, and the executive branch decision to return export applications without action.

This report results from a contract tasking Institute of Hydromechanics, National AS as follows: The contractor will perform experimental investigation of a large scale vortical structure in boundary layers over turbine blades. The research is to be performed at the Propulsion Directorate of Wright laboratory in Dayton, OH.

This paper breaks new ground by developing an innovative arms control model to explain how nations use instruments of national power to achieve their strategic arms control objectives. The model uses the principles of feedback to show the cause and effect relationship between two or more countries with competing arms control objectives. Feedback is a natural process present in almost all dynamic systems involving human behavior. The paper develops a notional political feedback loop where the country to be influenced is defined as a system. Another nation then uses its instruments of national power to influence this system to achieve the desired arms control outcome. After an overview of arms control issues in the post-Cold War, the paper transitions into the ideas and concepts used to develop the arms control model. The arms control model described here is fully universal. To present the model, this paper uses the United States and Ukraine as pilot countries. Ukraine is a real-world example where the United States has a vested interest in nuclear arms control. After the United States-Ukraine case study, the authors suggest how nations will employ arms control in the future. Although the focus of this paper is on nuclear arms control, the model is applicable to all weapons of mass destruction. The paper closes with a summary of results and suggests how to use the model for further research.

This report results from a contract tasking Kiev Shevchenko University as follows: The contractor will investigate the possibility of controlling the probability of nuclear decay of Mossbauer nuclei as described in his proposal.

This report is a review of research submersible vehicles and other marine technologies in Siberia and the Russian Far East. It complements a 1994 WTEC report covering submersible technologies in Ukraine and European Russia. The panel found that two institutions in Vladivostok have extensive developments and experience in operating remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs). In particular, two prototype AUVs developed by the Institute for Marine Technology Problems (IMTP) are rated at 6000 meters operating depth, one of which has logged 160 working dive missions greater than 4000 meters. The WTEC panelists concluded that IMTP had more AUV operating experience than all U.S. programs combined. The panel also visited several centers of excellence in the Novosibirsk area, including the Institute of Thermodynamics and Applied Mechanics, which is world-class facility for research on aerodynamics, including eight wind tunnels achieving air speeds up to Mach 25.

This report results from a contract tasking Academy of Scences of the Ukraine as follows: Grow both 6H and I 5R SiC using the Lely growth technique or other appropriate techniques as described in the attached proposal dated 22 July 1994. The SiC will be characterized by structural, physical and chemical analysis.

Most analyses addressing the subject of why states choose to proliferate focus on external motivations, particularly the security dilemma, facing a country's leaders. This paper concludes that, other factors, such as prestige, regime type and stability, and economic status, can have impact in determining proliferation outcomes. In the case of Newly Independent States of the former Soviet Union (NIS), the domestic problems generated by internal, conflicts, arms remaining from the Cold War, excess defense industrial capacity, economic difficulties and the breakdown of central authority resulting in a loss of border control and corruption have all made the NIS an extremely fertile ground for weapons proliferation. A more positive "rollback" situation has emerged in Latin America where both Argentina and Brazil have seemingly decided to forgo the acquisition of nuclear weapons and ballistic missiles. The U.S. must understand the "strategic personality" of each potential proliferation. Not all state behavior can be explained in terms of the security dilemma. One must also keep in mind the complexity of possible motivations. Economic and technological assistance and cooperative efforts at institution-building hold great potential to combating proliferation.

Major topics include: (1) Strategic arms reductions, (2) SDI, defense and space arms, (3) Conventional forces in Europe, and (4) Chemical and biological weapons.

Partical Contents: Public Health. This JPRS Report is Science and Technology: Central Eurasia: Life Sciences.

This report contains information concerning the nuclear proliferation status of the following countries: (1) Russia, (2) Ukraine, (3) Belarus, (4) Kazakhstan, (5) Israel, (6) India, (7) Pakistan, (8) South Africa, (9) North Korea, (10) Iraq, (11) Iran, (12) Lybia, (13) Algeria, (14) Syria, (15) Brazil, (16) Argentina, and (17) Taiwan.

This report contains translations/transcriptions of articles and/or broadcasts on political affairs from the USSR. Titles include: Law on USSR Citizenship Under Review; Writer Supports Return to Morals, Religious Faith; Librarians Strike State Library for Foreign Literature; Correspondent in Geneva Examines Attitudes Toward Soviet Human Rights Issues; Reader Asserts Children Lack Opportunities to Learn Ukrainian; Academician on Eliminating Blank Spots in Ukrainian Economics; Joint Enterprise Products Exhibited; and others.