Elemental periodic solutions of the circular restricted 3-body problem

In this thesis, the continuation and bifurcation software AUTO is used to investigate elemental periodic orbits, certain secondary bifurcating orbit families, and homoclinic orbits, associated with the libration points of the Circular Restricted 3-Body Problem, for values of the mass ratio between 0 and 0.5. Periodic solution families for representative values of the mass ratio, and corresponding bifurcation diagrams, are studied in detail. To understand the solution structure of the Circular Restricted 3-Body Problem better, a new data visualization package, DR Orbits, has been developed. It reads AUTO data files and creates solution diagrams. The package may be useful for space mission design. This new graphics package has good rendering speed, flexibility, and display quality. A user-friendly interface makes DR Orbits easy to us

Service model of the voice traffic in multiprotocol label switching networks

This paper proposes and investigates a service model of the voice traffic in multiprotocol label switching networks. The study of Multiprotocol label switching networks (MPLS) requires a formal description of processes occurring in them, development of mathematical models, reflecting main properties of the investigated object and allows calculating the values in the required operating mode. In this paper, we develop the model of functioning MPLS network in the form of a multi-phase, multi-channel, open-loop system. We propose analytical expressions describing the process of mutual influence when servicing requests of various communication directions. To determine parameters of quality of service quality and bandwidth channels MPLS network, necessary compare them with the values of normed and assess the compliance of the specified standards

Compton Imaging Tomography for Nondestructive Evaluation of Spacecraft Thermal Protection Systems

Novel nondestructive evaluation (NDE) systems based on a recently pioneered Compton Imaging Tomography (CIT) technique [1-4] are currently being developed by Physical Optics Corporation (POC). CIT provides high-resolution, three-dimensional, Compton scattered X-ray imaging of the internal structure of evaluated objects, using a set of acquired two-dimensional, Compton scattered X-ray images of consecutive cross sections of these objects. Unlike conventional computerized tomography, CIT requires only one-sided access to objects, has no limitation on the dimensions and geometry of such objects, and can be applied to large, multilayer, nonuniform objects. Also, CIT does not require any contact with objects during its application. Currently POC is developing a CIT-based tool that addresses NASA’s need for NDE of lightweight, rigid, and/or flexible ablative materials (PICA, Avcoat, AETB, etc.), and provides noncontact, one-sided in situ operation for accurate detection, identification, and precise spatial localization and measurements of internal and surface defects (cracks, voids, delaminations, porosity, and inclusions), and evaluation of bondlines and in-depth integrity of such materials and also large-area multilayer thermal protection system (TPS) structures with complex geometries. The feasibility of the tool was successfully demonstrated in NDE of various TPS samples provided by NASA. This tool can detect individual internal defects with dimensions about 1 mm3, and bondline defects less than 6 mm by 6 mm by the thickness of the adhesive of ≤100 μm. Also, it can detect anisotropy of the TPS materials. It also allows precise detection of flaws and in-service damage for ceramic, metal matrix composite, textile polymeric, aluminum/ titanium materials/structures, providing quantitative information on residual structural performance. The current scanning speed of TPS structures is about 2.5 min/ft2 (25 min/m2): ~250 ft2 of an entire Orion TPS can be scanned in 10-12 hr

Smart Portable Fluorometer for Express-Diagnostics of Photosynthesis: Principles of Operation and Results of Experimental Researches

In the Institute of Cybernetics of National Academy of Sciences of Ukraine the smart portable fluorometer for express-diagnostics of photosynthesis was designed. The device allows easy to estimate the level of influence of natural environment and pollutions to alive plants. The device is based on real time processing of the curve of chlorophyll fluorescent induction. The principles of operation and results of experimental researches of device are described in the article

Periodic Orbits Associated with the Libration Points of the Homogeneous Rotating Gravitating Triaxial Ellipsoid

We present computational results for the families of periodic orbits that emanate from the five libration points of the homogeneous gravitating triaxial ellipsoid rotating around its small axis, as well as for various secondary bifurcating families. Possible applications of our results include research on the motion of stars and clusters in elliptical galaxies, and the design of space missions to the vicinity of small bodies (asteroids) and their libration points. The numerical continuation and bifurcation algorithms employed in our study are based on boundary value techniques, as implemented in the AUTO software tool

The right of citizens to assemble peacefully, unarmed, to hold rallies and demonstrations: historical origins and genesis of formation

The subject matter of the study is the genesis and historical stages of the formation of the right of citizens to assemble peacefully, without weapons, to hold rallies, marches and demonstrations. Research results. The article, based on the analyzed materials, carried out a theoretical and legal analysis of the main elements of the conceptual and categorical apparatus of research, which is related to the essence and content of the right to peaceful assembly and its general importance in the system of legal values; the historical origins are outlined and the genesis of the formation of the constitutional right of citizens to assemble peacefully, without weapons and to hold meetings, rallies, marches and demonstrations is clarified; on the basis of generalization of scientific positions and norms of the legislation of Ukraine, and also foreign countries, including various historical periods, concerning legal regulation of the outlined question; complex theoretical and practical conclusions on the outlined problems are substantiated, which in our opinion can fragmentally influence the functioning of the relevant institution and the settlement of the main problems of its law enforcement. The practical significance of the studied question is that as a result of the outlined characteristic features of historical stages and genesis of formation of the corresponding institute the further scientific working out of problematic questions of its functioning, and also optimization of the basic problematic questions seems possible

Smart Portable Tester for Bird Flue Express-Diagnostics: Principles of Design

In the V.M. Glushov Institute of Cybernetics of National Academy of Sciences of Ukraine in collaboration with O.V. Palladin’s Institute of Biochemistry of National Academy of Sciences of Ukraine the smart portable device for express-diagnostics of acute viral infections, including bird flu, is designed. The device is based on the effect of surface plasmon resonance. The principles of device are described in the article

Developing of Distributed Virtual Laboratories for Smart Sensor System Design Based on Multi-Dimensional Access Method

In the article it is considered preconditions and main principles of creation of virtual laboratories for computer-aided design, as tools for interdisciplinary researches. Virtual laboratory, what are offered, is worth to be used on the stage of the requirements specification or EFT-stage, because it gives the possibility of fast estimating of the project realization, certain characteristics and, as a result, expected benefit of its applications. Using of these technologies already increase automation level of design stages of new devices for different purposes. Proposed computer technology gives possibility to specialists from such scientific fields, as chemistry, biology, biochemistry, physics etc, to check possibility of device creating on the basis of developed sensors. It lets to reduce terms and costs of designing of computer devices and systems on the early stages of designing, for example on the stage of requirements specification or EFT-stage. An important feature of this project is using the advanced multi-dimensional access method for organizing the information base of the Virtual laboratory

Compton imaging tomography for nondestructive evaluation of large multilayer aircraft components and structures

Novel nondestructive evaluation (NDE) systems based on a recently pioneered Compton Imaging Tomography (CIT) technique [1-4 are currently being developed by Physical Optics Corporation (POC). CIT provides high-resolution, three-dimensional (3D), Compton scattered X-ray imaging of the internal structure of evaluated objects, using a set of acquired two-dimensional Compton scattered X-ray images of consecutive cross sections of these objects. Unlike conventional computerized tomography, CIT requires only one-sided access to objects, has no limitation on the dimensions and geometry of such objects, and can be applied to large, multilayer, nonuniform objects. Also, CIT does not require any contact with objects during its application. POC is developing CIT-based tools that address Air Force needs for depot or in-field in situ NDE of various large, nonuniform, multilayer aluminum/titanium/composite and honeycomb sandwich aircraft/spacecraft structures with complex geometries, and provide accurate detection, identification, and precise 3D localization and measurement of possible internal and surface defects (corrosion, cracks, voids, delaminations, porosity, and inclusions), and also disbonds, core and skin defects, and intrusion of foreign fluids (e.g., fresh and salt water, oil) inside honeycomb sandwich structures. The feasibility of the tool was successfully demonstrated in NDE of various aircraft structure samples provided by the Air Force, Lockheed Martin, Boeing, SpaceX, Virgin Galactic, etc., and in situ NDE of C-5 and C-130 aircraft. Such tools can detect and localize individual internal defects with dimensions about 2 mm3, and honeycomb disbond defects less than 6 mm by 6 mm by the thickness of the adhesive of ≤100 μm. The current scanning speed of aircraft/spacecraft structures is about 2-3 min/ft2 (20-30 min/m2).</p

Compton Imaging Tomography for Nondestructive Evaluation of Spacecraft Thermal Protection Systems

Novel nondestructive evaluation (NDE) systems based on a recently pioneered Compton Imaging Tomography (CIT) technique [1-4] are currently being developed by Physical Optics Corporation (POC). CIT provides high-resolution, three-dimensional, Compton scattered X-ray imaging of the internal structure of evaluated objects, using a set of acquired two-dimensional, Compton scattered X-ray images of consecutive cross sections of these objects. Unlike conventional computerized tomography, CIT requires only one-sided access to objects, has no limitation on the dimensions and geometry of such objects, and can be applied to large, multilayer, nonuniform objects. Also, CIT does not require any contact with objects during its application. Currently POC is developing a CIT-based tool that addresses NASA’s need for NDE of lightweight, rigid, and/or flexible ablative materials (PICA, Avcoat, AETB, etc.), and provides noncontact, one-sided in situ operation for accurate detection, identification, and precise spatial localization and measurements of internal and surface defects (cracks, voids, delaminations, porosity, and inclusions), and evaluation of bondlines and in-depth integrity of such materials and also large-area multilayer thermal protection system (TPS) structures with complex geometries. The feasibility of the tool was successfully demonstrated in NDE of various TPS samples provided by NASA. This tool can detect individual internal defects with dimensions about 1 mm3, and bondline defects less than 6 mm by 6 mm by the thickness of the adhesive of ≤100 μm. Also, it can detect anisotropy of the TPS materials. It also allows precise detection of flaws and in-service damage for ceramic, metal matrix composite, textile polymeric, aluminum/ titanium materials/structures, providing quantitative information on residual structural performance. The current scanning speed of TPS structures is about 2.5 min/ft2 (25 min/m2): ~250 ft2 of an entire Orion TPS can be scanned in 10-12 hr.</p