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Preliminary Study of Utilizing Plastic Tubes as a Component of Continuum Robots
Denys Makarets,Gunwoo Noh,Keri Kim,Deukhee Lee 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
Continuum robots, new class of dexterous and thin robots, can be applied in great variety of minimal invasive surgical operations. These robots consist of two parts: manipulator, also called active cannula, and control unit. Manipulators, which are composed of concentric precurved tubes(usually 2-3), commonly made from nitinol, can enter human body through small incisions or natural orifices and, after reconfiguration into more complex structure, guide surgical instruments to the target regions avoiding obstacles. In this paper, we propose to use plastic as the material for innermost tube. Variations in the shape of lab-made concentric precurved plastic tube prototypes after numerous extension-retractions are investigated. We also use kinematic model, based on beam mechanics, for capturing the end-effector tip position and the shape of the two manipulators (I ? manipulator is composed of one nitinol tube and one plastic tube prototype; II ? manipulator is composed of two nitinol tubes and one plastic tube prototype). The model predictions are compared with the experimental results. Preliminary results show that plastic tubes may have small radii of precurvature, and sustain extension-retraction without self-damage thus potentially can be used as a component of continuum robots.
Modern Tendencies of Digitalization of the Financial Services Sphere
Krylov, Denys,Papaika, Oleksandr,Panchenko, Olena,Pylevych, Dmytro,Kozlianchenko, Olena,Konoplia, Nataliia International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.2
The article is devoted to clarifying current trends in the digitalization of financial services. To this end, the evolution of this process in the financial sector was studied and six stages of its development were identified. The components of successful implementation of digitalization in the field of financial services and its tasks are outlined. It was found that fintech companies, which work to achieve effective interaction between the financial sector and innovative technologies in the use of mobile applications in order to most fully and quickly meet the needs of customers with financial services, are of great importance for the formation and development of digitalization in financial services. Current trends in the digitalization of financial services in Ukraine based on the use of fintech in general and banking institutions in particular are presented.
Theoretical And Technological Aspects Of Intelligent Systems: Problems Of Artificial Intelligence
Frolov, Denys,Radziewicz, Wojciech,Saienko, Volodymyr,Kuchuk, Nina,Mozhaiev, Mykhailo,Gnusov, Yurii,Onishchenko, Yurii International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.5
The article discusses approaches to the definition and understanding of artificial intelligence, research directions in the field of artificial intelligence; artificial intelligence in the anthropological dimension; the importance of the systems approach as a methodological basis for the design of intelligent systems; structural and functional components of intelligent systems; intelligent systems in the technological aspect; problems and prospects of relations in the system "man - intellectual system".
Sudhir, Putty-Reddy,Pogoryelov, Denys,Kovacs, Laszlo,Garab, Gyozo,Murthy, Sistla D.S. Korean Society for Biochemistry and Molecular Biol 2005 Journal of biochemistry and molecular biology Vol.38 No.4
The response of Spirulina (Arthrospira) platensis to high salt stress was investigated by incubating the cells in light of moderate intensity in the presence of 0.8 M NaCl. NaCl caused a decrease in photosystem II (PSII) mediated oxygen evolution activity and increase in photosystem I (PSI) activity and the amount of P700. Similarly maximal efficiency of PSII (Fv/Fm) and variable fluorescence (Fv/Fo) were also declined in salt-stressed cells. Western blot analysis reveal that the inhibition in PSII activity is due to a 40% loss of a thylakoid membrane protein, known as D1, which is located in PSII reaction center. NaCl treatment of cells also resulted in the alterations of other thylakoid membrane proteins: most prominently, a dramatic diminishment of the 47-kDa chlorophyll protein (CP) and 94-kDa protein, and accumulation of a 17-kDa protein band were observed in SDS-PAGE. The changes in 47-kDa and 94-kDa proteins lead to the decreased energy transfer from light harvesting antenna to PSII, which was accompanied by alterations in the chlorophyll fluorescence emission spectra of whole cells and isolated thylakoids. Therefore we conclude that salt stress has various effects on photosynthetic electron transport activities due to the marked alterations in the composition of thylakoid membrane proteins.
Integrated Model of the Higher Education Financing Under the Quadruple Helix Concept
Kholiavko, Nataliia,Zhavoronok, Artur,Shaposhnykov, Kostiantyn,Krylov, Denys,Morozova, Liudmyla,Babiak, Nataliia International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.7
Rapid growth of the higher education role in ensuring the socio-economic and innovative development of the national economy in the context of the development of the information society and the knowledge economy is observed. Achieving positive synergistic effects of the higher education development requires proper funding for university education and research. The existing funding models for national higher education systems in a number of developing countries need modernization in accordance with the modern challenges of economic and innovative development. The purpose of the article is to formulate theoretical - methodological and applied foundations for the development and implementation of the integrated model of the higher education financing under the Quadruple Helix concept. At the center of the developed model are the areas of interaction identified by the authors, namely: Personnel, Science, Management, Innovation, Social area. This made it possible to specify the interests of all stakeholders and orient the activities of higher education institutions to the satisfaction of these interests. Effective implementation of the integrated Model of the higher education financing requires increasing the level of investment attractiveness and practical value of university research; activation of innovative development of enterprises; state stimulation of business participation in university research and education; harmonization of current legislation with EU standards. Implementation of the Model will diversify sources of funding for universities, increase their level of economic security and achieve integrated synergies from the interaction of universities, business, government and the public (as the main stakeholders within the Quadruple Helix concept).
Miloud Hemsas,Sidi-Mohammed Elachachi,Denys Breysse 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.3
Numerical simulation of the non-linear behavior of (RC) structural walls subjected to severe earthquake ground motions requires a reliable modeling approach that includes important material characteristics and behavioral response features. The objective of this paper is to optimize a simplified method for the assessment of the seismic response and damage development analyses of an RC structural wall building using macro-element model. The first stage of this study investigates effectiveness and ability of the macro-element model in predicting the flexural nonlinear response of the specimen based on previous experimental test results conducted in UCLA. The sensitivity of the predicted wall responses to changes in model parameters is also assessed. The macro-element model is next used to examine the dynamic behavior of the structural wall building−all the way from elastic behavior to global instability, by applying an approximate Incremental Dynamic Analysis (IDA), based on Uncoupled Modal Response History Analysis (UMRHA), setting up nonlinear single degree of freedom systems. Finally, the identification of the global stiffness decrease as a function of a damage variable is carried out by means of this simplified methodology. Responses are compared at various locations on the structural wall by conducting static and dynamic pushover analyses for accurate estimation of seismic performance of the structure using macro-element model. Results obtained with the numerical model for rectangular wall cross sections compare favorably with experimental responses for flexural capacity, stiffness, and deformability. Overall, the model is qualified for safety assessment and design of earthquake resistant structures with structural walls.
Hemsas, Miloud,Elachachi, Sidi-Mohammed,Breysse, Denys Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.3
Numerical simulation of the non-linear behavior of (RC) structural walls subjected to severe earthquake ground motions requires a reliable modeling approach that includes important material characteristics and behavioral response features. The objective of this paper is to optimize a simplified method for the assessment of the seismic response and damage development analyses of an RC structural wall building using macro-element model. The first stage of this study investigates effectiveness and ability of the macro-element model in predicting the flexural nonlinear response of the specimen based on previous experimental test results conducted in UCLA. The sensitivity of the predicted wall responses to changes in model parameters is also assessed. The macro-element model is next used to examine the dynamic behavior of the structural wall building-all the way from elastic behavior to global instability, by applying an approximate Incremental Dynamic Analysis (IDA), based on Uncoupled Modal Response History Analysis (UMRHA), setting up nonlinear single degree of freedom systems. Finally, the identification of the global stiffness decrease as a function of a damage variable is carried out by means of this simplified methodology. Responses are compared at various locations on the structural wall by conducting static and dynamic pushover analyses for accurate estimation of seismic performance of the structure using macro-element model. Results obtained with the numerical model for rectangular wall cross sections compare favorably with experimental responses for flexural capacity, stiffness, and deformability. Overall, the model is qualified for safety assessment and design of earthquake resistant structures with structural walls.