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Wyszukujesz frazę "Kharchenko, Volodymyr" wg kryterium: Autor

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    Wyświetlanie 1-23 z 23
    Tytuł:
    The Use of Unmanned Aircraft Systems for Fast Delivery Goods
    Autorzy:
    Kharchenko, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/1797208.pdf
    Data publikacji:
    2020
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    Unmanned aircraft systems
    drones
    aviation system
    Opis:
    The unmanned aircraft systems are used for different purposes by logistics companies as also for fast delivery goods in aviation industry. The article provides the advantages, functions and characteristics of unmanned aircraft systems which can improve fast delivery of goods that is a complex process, including not only transport but also effective system management.
    Źródło:
    Logistics and Transport; 2020, 47-48, 3-4; 89-101
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Consideration of Individual Learning Styles in the Process of Professional Training of Future Air Traffic Controllers
    Autorzy:
    Kolotusha, Volodymyr
    Kharchenko, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/504612.pdf
    Data publikacji:
    2016
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    Green air traffic controller
    air traffic service
    training
    individual learning styles
    activist
    theorist
    pragmatist
    reflector
    instructor
    Opis:
    The approaches for improvement of the future air traffic controllers training efficiency according to their individual learning styles are considered. It is purposeful to use the P. Honey & A. Mumford’s criteria-based test for distribution of students into four basic learning styles. The role of air traffic controller-instructor in process of rating the training is considered.
    Źródło:
    Logistics and Transport; 2016, 30, 2; 81-86
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Features of Implementation of Safety Management System
    Autorzy:
    Kharchenko, Volodymyr
    Chynchenko, Yuryi
    Powiązania:
    https://bibliotekanauki.pl/articles/504090.pdf
    Data publikacji:
    2009
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Opis:
    The article is devoted to the issue of implementation of safety management system. It is one of the most important areas in the field of air transport. The authors are presenting modern approach to the problem. Aspects of practical realisation of safety management in National Aviation University (Ukraine) are given.
    Źródło:
    Logistics and Transport; 2009, 9, 2; 39-42
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern Trends of Aviation Logistics Development – Effectiveness, Safety and Security Aspects
    Autorzy:
    Kharchenko, Volodymyr
    Bugayko, Dmytro
    Powiązania:
    https://bibliotekanauki.pl/articles/504634.pdf
    Data publikacji:
    2013
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    aviation logistics
    effectiveness
    efficiency
    safety
    security
    cargo
    airlines
    Opis:
    Improvement of international aviation logistics is one of the basic instruments of airlines commercial activity under constant increase of aircraft operating costs and tough competition. This research paper discusses modern trends of aviation logistics development. Special attention is paid to efficiency, safety and security of the world aviation logistics system.
    Źródło:
    Logistics and Transport; 2013, 18, 2; 17-24
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aerospace Navigation Technologies in Logistics
    Autorzy:
    Kharchenko, Volodymyr
    Kondratiuk, Vasyl
    Powiązania:
    https://bibliotekanauki.pl/articles/504182.pdf
    Data publikacji:
    2015
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    logistics
    navigation
    satellite technologies
    control systems
    Opis:
    The work examines the technical aspects of the solution of logistics tasks in the automobile transport domain that are based on satellite navigation technologies, communications and geoinformation systems. Present-day international requirements to the hardware and software of the AVL class are provided.
    Źródło:
    Logistics and Transport; 2015, 26, 2; 5-10
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multipurpose Remotely Piloted Aircraft System Integrated Navigation System Development and Testing
    Autorzy:
    Kharchenko, Volodymyr
    Ilnytska, Svitlana
    Powiązania:
    https://bibliotekanauki.pl/articles/504411.pdf
    Data publikacji:
    2013
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    remotely piloted aircraft system (RPAS) integrated navigation system
    strapped down inertial navigation system (SINS)
    global navigation satellite system (GNSS)
    MEMS sensor, logistic
    Opis:
    The paper presents development of prototype of integrated inertial-satellite navigation system that contains 3-axis accelerometers, gyros, magnetometers, barometric altimeter and GNSS (Global Navigation Satellite System) receiver. Navigation system testing procedure by means of flight at airdrome at small remotely piloted aircraft system (RPAS) is described, and data processing details with results are submitted. These results received from the data post-processing had approved the efficiency of integrated navigation system functioning in normal navigation mode, i.e. during availability of GNSS measurements. It has been shown as well that after approximately 10 s of autonomous MEMS inertial navigation system (INS) functioning accuracy of velocity and position calculation degrades significantly.
    Źródło:
    Logistics and Transport; 2013, 19, 3; 85-90
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Technologies in the Global Aero - Space Engineering Education
    Autorzy:
    Foriash, Marek
    Kharchenko, Volodymyr
    Bugayko, Dmytro
    Powiązania:
    https://bibliotekanauki.pl/articles/504567.pdf
    Data publikacji:
    2014
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    technologies
    global aero - space engineering education
    cycles of education
    hazards
    risks
    unmanned aerial vehicles
    Opis:
    New technologies in the global aero - space engineering education are considered. The paper paid special attention to the civil aviation hazards and risks in the context of global aviation development trends. The paper deals with challenges of new aviation specialties creation, including features of 1, 2 and 3 education cycles. The paper introduces practical experience of the National Aviation University according to the new technologies in the aero - space engineering education implementation.
    Źródło:
    Logistics and Transport; 2014, 24, 4; 37-44
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hardware and Software Complex for Laboratory of Satellite Technologies
    Autorzy:
    Kharchenko, Volodymyr
    Konin, Valeriy
    Pogurelskiy, Oleksiy
    Powiązania:
    https://bibliotekanauki.pl/articles/504541.pdf
    Data publikacji:
    2020
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    satellite technologies
    laboratory
    GNSS
    Opis:
    Satellite technologies of communication, navigation and surveillance play an important role in modern transport, and particularly in aviation. High effectiveness of global air navigation system is provided by applying data broadcasted from great numbers of satellites, located on Earth orbits. The totality of existing satellite navigation system forms global radio navigation field which parameters should be constantly monitored and controlled for providing safety requirements. The aim of this article is to share experience of creating a laboratory of satellite technologies at the National Aviation University that performs simultaneously educational and scientific tasks.
    Źródło:
    Logistics and Transport; 2020, 45-46, 1-2; 95-102
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical Model of Errors of Odometry and Georeferencing Channels in Visual Correlation Extreme Navigation
    Autorzy:
    Mukhina, Maryna Petrivna
    Kharchenko, Volodymyr Petrovych
    Powiązania:
    https://bibliotekanauki.pl/articles/503832.pdf
    Data publikacji:
    2017
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    correlation extreme navigation
    visual odometry
    geo-referencing
    feature matching
    cartographic errors
    dead reckoning errors
    Opis:
    The mathematic model of errors in correlation with the extreme navigation system (CENS) is developed basing on odometry and geo-referencing channels. The realization of the model is done in Simulink, and based on regular and random components of additive noise. The results of simulations prove accumulation of errors for odometry errors and its mitigation in case of geo-referencing in periods of correction.
    Źródło:
    Logistics and Transport; 2017, 33, 1; 31-36
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergy of Piloted, Remotely Piloted and Unmanned Air Systems in Single Air Navigation Space
    Autorzy:
    Kharchenko, Volodymyr Petrovich
    Chepizhenko, Valery
    Pavlova, Svitlana
    Powiązania:
    https://bibliotekanauki.pl/articles/504218.pdf
    Data publikacji:
    2013
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    conflict resolution
    free flight
    synergetic approach
    autonomous aircraft
    Opis:
    A synergistic approach to the organization of autonomous free flight operation of manned, remotely piloted and unmanned vehicles in modern air navigation space is presented in this article. The conditions for the implementation autonomy properties of the flight crew activity to resolve the conflicts with other aircraft are considered.
    Źródło:
    Logistics and Transport; 2013, 18, 2; 77-84
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multiplication of Air Accidents Frequency and Hazard Desirability Coefficients for ICAO Safety Risk Tolerability Matrix Solution
    Autorzy:
    Borsuk, Sergey Pavlovich
    Reva, Oleksiy
    Kharchenko, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/504648.pdf
    Data publikacji:
    2015
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    flight safety
    tolerability matrix
    frequency and hazard event desirability coefficients
    Harrington function
    risk level determination criteria
    Opis:
    Using mathematical method of priorities arrangement, also known as problem “about leader”, air accidents frequency and hazard desirability coefficients were found. Those coefficients are proposed by ICAO for safety risk tolerability matrix solution. Integral index of mentioned parameters combinations hazard is found with help of Harrington desirability function. Risk levels determination index is introduced for researched matrix.
    Źródło:
    Logistics and Transport; 2015, 25, 1; 63-70
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quality of unmanned aerial vehicles: ergodesign aspect
    Autorzy:
    Kharchenko, Volodymyr
    Rubtsov, Anatolii
    Svirko, Volodymyr
    Zhudova, Iryna
    Powiązania:
    https://bibliotekanauki.pl/articles/1961878.pdf
    Data publikacji:
    2021-12-30
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    unmanned aerial vehicle
    ergodesign quality indicators
    unmanned aircraft maintenance
    operator activities
    operational indicators
    environmental awareness
    versatility of UAV
    Opis:
    In the modern world, scientific and practical ergodesign activity on the development and use of drones, the concept of "human factor" is becoming more and more important. It is one of the main studies in improving the safety, efficiency and comfort of the "man - unmanned aerial vehicle" system operation. The most promising research is aimed at the application and development of new approaches to the evaluation of algorithms for unmanned aircraft maintenanceand the organization of their operators` activities. The system of unmanned aerial vehicles ergodesign quality indicators developed and presented in a tabular form reflects practically all design and ergonomic properties of modern unmanned aerial systems. It is based on the existing normative documentation in Ukraine developed by the authors, harmonized with international and European standards. It allows the analysis and evaluation of unmanned aerial vehicles in order to take into account consumer interests at the beginning of their design reducing the assimilation time of products and preventing irrational production costs. The results of such an analysis underlie the development of technical documentation, standards, and specifications. They should be taken into account when putting products into production.
    Źródło:
    Logistics and Transport; 2021, 51-52, 3-4; 35-78
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Challenges of International Science and Education in the Field of Aviation Transport Safety
    Autorzy:
    Isaienko, Volodymyr
    Pawęska, Marcin
    Kharchenko, Volodymyr
    Bugayko, Dmytro
    Powiązania:
    https://bibliotekanauki.pl/articles/504122.pdf
    Data publikacji:
    2018
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    aviation safety
    international education
    cycles of education
    hazards
    risks
    safety management system
    scientific research activity
    innovations
    Opis:
    The aviation safety issue has been one of the most urgent challenges since the first day of flight operations. Aircrafts, avionics, engines, and navigation, communication and surveillance aids have changed and developed, but the problem has never lost its relevance. The main purpose of ICAO is to ensure the safe and orderly development of all aspects of international civil aviation. ICAO develops Standards and Recommended Practices. They are set out in 19 Annexes to the Convention on International Civil Aviation. The new ICAO strategies are the basis for the further sustainable development of global civil aviation. The paper paid special attention to the civil aviation hazards monitoring and risks management in the context of global aviation development trends.The paper deals with challenges of international education and introduces practical experience of the National Aviation University according to the new technologies in transport and aviation education, and trends of international cooperation with the International University of Logistics and Transport in Wroclaw in this sphere.
    Źródło:
    Logistics and Transport; 2018, 38, 2; 23-32
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Efficiency and Effectiveness of Remotely Piloted Aircraft Systems Used in Logistics Problems Solving Due to Territorial Infrastructure
    Autorzy:
    Kharchenko, Volodymyr
    Pawęska, Marcin
    Bugayko, Dmytro
    Prusov, Dmytro
    Powiązania:
    https://bibliotekanauki.pl/articles/503704.pdf
    Data publikacji:
    2014
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    remotely piloted aircraft systems unmanned aerial vehicles
    logistics
    territorial infrastructure
    effectiveness
    efficiency
    Opis:
    The use of Remotely Piloted Aircraft Systems RPAS has been considered for a wide range of tasks performed in global logistics systems and territorial infrastructure. In order to improve the efficiency the advanced methods of using new unmanned vehicles with extensive use of features modular construction and design modifications have been proposed.
    Źródło:
    Logistics and Transport; 2014, 22, 2; 13-20
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problems of World Air Transportation Market Globalization
    Autorzy:
    Bugayko, Dmytro
    Kulyk, Mykola
    Kharchenko, Volodymyr
    Ilienko, Oksana
    Powiązania:
    https://bibliotekanauki.pl/articles/504232.pdf
    Data publikacji:
    2013
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    globalization
    liberalization
    effectiveness
    efficiency
    safety
    security
    air carriers
    airports
    ATC providers
    Opis:
    The principles of civil aviation safety and efficiency in conditions of air transportation market globalization are considered. The paper paid special attention to the civil aviation threats and risks in the context of globalization processes. The paper deals with problems of changes of multilateral and bilateral regulations philosophy, the liberalization of airlines designation, national ownership and control provisions, the development of airline alliances, code-sharing agreements and franchising, the development of low-cost carriers operations, the outsourcing of ground handling, aircraft repair and maintenance, the globalization and commercialization of airports and air navigation service providers, the significant growth of air cargo and logistics transportations.
    Źródło:
    Logistics and Transport; 2013, 19, 3; 65-74
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Quality of Unmanned Aerial Vehicles: Ergodesign Aspect. Part 2
    Autorzy:
    Kharchenko, Volodymyr
    Rubtsov, Anatolii
    Svirko, Volodymyr
    Zhudova, Iryna
    Powiązania:
    https://bibliotekanauki.pl/articles/2056522.pdf
    Data publikacji:
    2022-06-07
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    unmanned aerial vehicle
    ergodesign aspect
    aerial systems
    Opis:
    In the modern world, scientific and practical ergodesign activity on the development and use of drones, the concept of "human factor" is becoming more and more important. It is one of the main studies in improving the safety, efficiency and comfort of the "man - unmanned aerial vehicle" system operation. The most promising research is aimed at the application and development of new approaches to the evaluation of algorithms for unmanned aircraft maintenance and the organization of their operators` activities. The system of unmanned aerial vehicles ergodesign quality indicators developed and presented in a tabular form reflects practically all design and ergonomic properties of modern unmanned aerial systems. It is based on the existing normative documentation inUkrainedeveloped by the authors, harmonized with international and European standards. It allows the analysis and evaluation of unmanned aerial vehicles in order to take into account consumer interests at the beginning of their design reducing the assimilation time of products and preventing irrational production costs. The results of such an analysis underlie the development of technical documentation, standards, and specifications. They should be taken into account when putting products into production.
    Źródło:
    Logistics and Transport; 2022, 53-54, 1-2; 133-160
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Approaches for Safety Levels Measurements – Sequential Probability Ratio Test (SPRT)
    Autorzy:
    Kharchenko, Volodymyr
    Bugayko, Dmytro
    Antonova, Anna
    Grigorak, Maria
    Pawęska, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/503798.pdf
    Data publikacji:
    2017
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    the International Civil Aviation Organization (ICAO)
    Standards and Recommended Practices (SARPs)
    safety of aviation
    safety management system, financial management
    safety space
    safety/protection boundary hypothesis
    theory
    Sequential Probability Ratio Test (SPRT)
    accidents and incidents reports, audits
    surveys
    flight data analysis (FDA)
    voluntary and involuntary reports and confidential communications
    Opis:
    The principles of civil aviation safety are considered. At present time, aviation is an ultra-safe system, (i.e. a system that experiences less than one catastrophic safety breakdown every one million production cycles). But, unfortunately, we can never state that aviation activities will be absolutely safe. In current conditions the increase of the civil aviation safety level is one of the principal objectives of the world air transport development. The paper pays special attention to the civil aviation threats and risks in the context of globalization processes. The investigation deals with problems of global implementation of Annex 19 to the Convention of the International Civil Aviation. Present research paper discusses new theoretical approaches to searching for methods to assess the “safety space” of civil aviation activity. Special attention is paid to an effective test, proposed by A. Wald.
    Źródło:
    Logistics and Transport; 2017, 34, 2; 25-32
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The modal analysis of a two-link mechanical system of a robot manipulator
    Autorzy:
    Kharchenko, Yevhen
    Palyukh, Volodymyr
    Vira, Volodymyr
    Vasyliv, Bogdan
    Powiązania:
    https://bibliotekanauki.pl/articles/2096203.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    mechanical system
    link sections
    robot manipulator
    układ mechaniczny
    manipulator robota
    analiza modalna
    Opis:
    The method of calculation of natural frequencies and forms of oscillations of a two-link mechanical system of a robot manipulator is proposed. Links of the system are considered as straight rods with a step change of cross-sectional parameters. The equations of motion of a mechanical system are based on the technical bending theory. The analysis of oscillation processes is carried out using the matrix method of initial parameters.
    Źródło:
    Diagnostyka; 2022, 23, 3; art. no. 2022204
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The diagnostics and ways heat treatment optimization of a railway wheels steel
    Diagnostyka i kierunki optymalizacji obróbki ciepłnej stali kół kolejowych
    Autorzy:
    Vira, Volodymyr
    Kulyk, Volodymyr
    Chepil, Roman
    Kharchenko, Yevhen
    Duriagina, Zoia
    Powiązania:
    https://bibliotekanauki.pl/articles/328059.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    railway wheel steel
    local stress
    local strain
    strain energy
    fatigue crack growth
    stal kół kolejowych
    naprężenia lokalne
    odkształcenia lokalne
    propagacja pęknięcia zmęczeniowego
    Opis:
    A high resolution sensor of linear displacements has been elaborated for diagnosing the size of the crack tip opening in standard test specimens. Based on the data measured during fatigue crack growth resistance tests of a wheel steel heat treated after various modes, calculations of the strain and energy parameters of local fracture were performed for the corresponding variants of treatment, and fatigue crack growth rate diagrams were constructed using different approaches of fatigue fracture mechanics. It was established that the diagrams obtained using the strain and energy approaches are more sensitive to material microstructure and its mechanical properties than the traditional diagrams obtained using the stress approach. Based on the parameters of the fatigue crack growth resistance estimated using the strain and energy approaches, the effective diagnostics and the best heat treatment mode for the wheel steel was developed. It comprises the stages of isothermal quenching and tempering at a temperature of 500 °С, providing the highest fatigue fracture toughness of the steel.
    Opracowano czujnik przemieszczeń liniowych o podwyższonej czułości dla diagnozowania rozwartości szczeliny na podstawie określenia odkształceń i energetycznych parametrów uszkodzenia lokalnego. W oparciu o różne podejścia mechaniki zniszczenia zmęczeniowego zostały skonstruowane diagramy prędkości propagacji pęknięć zmęczeniowych w stali koła kolejowego po różnych rodzajach obróbki cieplnej. Ustalono, że diagramy odporności na pękanie, otrzymane według odkształceniowego lub energetycznego podejścia, są bardziej wrażliwe do strukturalnych i mechanicznych własności materiałów w porównaniu z tradycyjnymi diagramami otrzymanymi według podejścia siłowego. Pokazano zalety odkształceniowego i energetycznego podejścia w porównaniu z podejściem siłowym w zakresie optymalizacji charakterystyk odporności materiałów na pękanie. Dokonano skutecznej diagnostyki stanu technicznego materiału oraz optymalizacji obróbki cieplnej stali kół kolejowych. Ustalono, że hartowanie izotermiczne z odpuszczaniem przy temperaturze 500°C zapewnia najwyższą odporność stali na pękanie.
    Źródło:
    Diagnostyka; 2019, 20, 2; 105-111
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of particle size distribution of grinded amber by electropulse discharges in a liquid medium
    Autorzy:
    Chornyi, Valentyn
    Kharchenko, Yevhen
    Mysiura, Taras
    Popova, Nataliia
    Zavialov, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/1845029.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    amber
    electropulse discharge
    grinding
    particle size distribution
    fraction
    bursztyn
    szlifowanie
    rozkład wielkości cząstek
    frakcja
    Opis:
    The article presents the study results of electropulse grinding of amber in aqueous and alcoholic media at different amounts of supplied energy. Description of the electropulse grinding laboratory installation, the mechanism of the destruction process of amber particles and methods of statistical processing of experimental data are given. It was established that alcohol medium has a greater impact on the efficiency of crushing than water. Thus, under the same conditions of energy supply, in the aqueous medium the weighted average particle size of amber was 601:6±688:9 μm, and in an alcohol medium – 368:0±269:6 μm. In an aqueous medium, the particle size decreased to 1/13.6 of raw sample, and in an alcoholic medium to 1/22.3 of raw sample compared to the initial size of raw amber. We found that in the aqueous medium the ratio of large to small fractions is mainly the same with the coefficient of alignment of particles with a size of 1.09. In an alcoholic medium, this ratio significantly differs, with the coefficient of alignment of amber particles of a size of 1.67 with the amount of supplied energy of 125 kJ.
    Źródło:
    Archive of Mechanical Engineering; 2021, LXVIII, 3; 337-348
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of surface acoustic waves to evaluate of the near-surface layers of metal processed shot peening
    Autorzy:
    Skalskyi, Valentyn
    Student, Mykhaylo
    Mokryy, Oleh
    Dudda, Waldemar
    Kharchenko, Yevhen
    Chumalo, Halyna
    Hvozdetskyi, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/1840854.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    shot peening
    Rayleigh surface wave velocity
    residual mechanical stresses
    roughness
    chropowatość
    prędkość fali
    fala powierzchniowa Rayleigha
    naprężenia własne
    Opis:
    The surface layers of low-carbon steel metal subjected to shot peening were studied. The velocity of Rayleigh surface waves of various frequencies in the range of 3-9 MHz by the phase-pulse method using contact piezoelectric transducers measured. The study of the distribution of residual mechanical stresses in depth was carried out using the etching of the surface layer of the metal and the use of a strain gauges. The characteristics of the roughness of the surface layer of the metal, which has arisen as a result of shot peening, have been determined. The effect of roughness and plastically deformed layer on the velocity of surface acoustic waves (SAW) is estimated by the method of layer-by-layer grinding of the surface layers of the metal. Based on the determination of the magnitude of the residual mechanical stresses and the known acoustoelastic coefficients, the magnitude of the change in the velocity of SAW under the action of these stresses is estimated.
    Źródło:
    Diagnostyka; 2021, 22, 3; 51-57
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of surface acoustic waves to evaluate of the near-surface layers of metal processed shot peening
    Autorzy:
    Skalskyi, Valentyn
    Student, Mykhaylo
    Mokryy, Oleh
    Dudda, Waldemar
    Kharchenko, Yevhen
    Chumalo, Halyna
    Hvozdetskyi, Volodymyr
    Powiązania:
    https://bibliotekanauki.pl/articles/1840877.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    shot peening
    Rayleigh surface wave velocity
    residual mechanical stresses
    roughness
    chropowatość
    prędkość fali
    fala powierzchniowa Rayleigha
    naprężenia własne
    Opis:
    The surface layers of low-carbon steel metal subjected to shot peening were studied. The velocity of Rayleigh surface waves of various frequencies in the range of 3-9 MHz by the phase-pulse method using contact piezoelectric transducers measured. The study of the distribution of residual mechanical stresses in depth was carried out using the etching of the surface layer of the metal and the use of a strain gauges. The characteristics of the roughness of the surface layer of the metal, which has arisen as a result of shot peening, have been determined. The effect of roughness and plastically deformed layer on the velocity of surface acoustic waves (SAW) is estimated by the method of layer-by-layer grinding of the surface layers of the metal. Based on the determination of the magnitude of the residual mechanical stresses and the known acoustoelastic coefficients, the magnitude of the change in the velocity of SAW under the action of these stresses is estimated.
    Źródło:
    Diagnostyka; 2021, 22, 3; 51-57
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of ademetionine and ipidacrine/phenibut on the NCAM distribution and behavior in the rat model of drug-induced liver injury
    Autorzy:
    Muraviova, Diana
    Kharchenko, Yuliia
    Pierzynowska, Kateryna
    Pierzynowski, Stefan
    Wolinski, Jarek
    Dyomshyna, Olga
    Zhyliuk, Volodymyr
    Ushakova, Galyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2038253.pdf
    Data publikacji:
    2020-09-30
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    ademetionine
    brain
    ipidacrine/phenibut, isoniazi
    liver disease
    NCAM
    rifampicin
    Opis:
    Introduction. Recently, more attention is being paid to the drug-induced liver injury (DILI) as a consequence of the tuberculos is treatment and the need for new medicine is emphasized. The use of isoniazid and rifampicin has a potentiating effect, which increases the risk of substancial liver damage. In turn, systemic accumulation of toxic metabolites leads to negative changes in various organs, including the brain. It causes an imbalance in biochemical and neurophysiological processes in the brain, ultimately giving the onset to the development of hepatic encephalopathy. Aim. The effects of rifampicin and isoniazid on the central nervous system have not been studied before and we aimed to evaluate the impact these two substances have on the neuronal cell adhesion molecules (NCAM) distribution and animal behavior in the rat model of DILI. Material and methods. The 24 male Wistar rats, weighing 180-220 g were used for the experiment and divided to the groups (n=6): 1 – control; 2 – rats with experimental DILI; 3 – rats with DILI plus the intravenous infusion of S-adenosyl-L-methionine at a dose of 35 mg/kg; 4 – rats with DILI plus a fixed combination of ipidacrine hydrochloride at a dose 1 mg/kg body weight and phenibut at a dose 60 mg/kg body weight daily for the last 14 days of the experiment. All experimental procedures were carried out in the accordance with the principles outlined in the current Guide to the Care and Use of Experimental Animals. The locomotor and research activities were studied in the open field test. The activity of aspartate aminotransferase (AST, ЕС 2.6.1.1) and alanine aminotransferase (ALT, ЕС 2.6.1.2) in the serum of rats were tested to confirm the liver damage. The quantitative analyses of soluble and membrane forms of NCAM were performed with ELISA. The ANOVA followed by a Tukey post-hoc test was used to assess statistical differences between groupsResults. Our investigation in the open field test revealed a significant decrease in the locomotor and research activity of rats after 28 days of rifampicin and isoniazid administration. The recovery of investigated parameters was observed in groups of animals treated with ademetionine (AD group) or combination of ipidacrine and phenibut (IP/PB group). We also observed that changes in rats’ behavior were consistent with alterations of the NCAM levels in the thalamus and hippocampus. Thus, the level of membrane NCAM was significantly decreased under DILI in both investigated brain regions (thalamus and hippocampus), while both AD and IP/PB treatments restored membrane NCAM levels towards those observed in the control group at least in the hippocampus. Conclusion. Obtained data suggests that both ademetionine and combinated drug containing ipidacrine and phenibut possesses neuroprotective properties and could prevent the decline in synaptic plasticity under antitubercular therapy.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2020, 3; 155-164
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-23 z 23

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