332 research outputs found
The Worlds of travelling by Andrii Bludov
No full textСтаттю присвячено аналізу серії полотен "Сицзан" відомого сучасного художника Андрія Блудова. Зустрівшись із культурою Сходу (Тибет), митець по-новому інтерпретує пластичні прийоми, які
властиві його стилістиці. Проте чари медитації повною мірою не захопили свідомості Блудова, він
наполягає на необхідності динамічного життя. Автора не можна назвати митцем однієї інтелектуальної та пластичної теми, оскільки у його доробку – експерименти різних видів і технік мистецтва.
Художник визначає власну творчість як «прикордонну», що існує на межі абстракції та внутрішнього реалізму. У творах Блудова існують архетипові образи-знаки, що мандрують з одного полотна
на інше. Андрій Блудов маніфестує ідеї благочестя та мудрості в час, коли соціальний активізм захопив свідомість більшості українських художників. Повна художня та інтелектуальна інформація
полотен Блудова відкривається, якщо глядач готовий сприйняти її на чуттєвому та розумовому рівнях.This article analyzes the series of paintings “Sytszan” by famous contemporary artist Andrii Bludov.
Faced with the culture of the East (Tibet), he interprets this theme in new plastic techniques within his style.
But the spell of meditation did not fully capture Bludov’s consciousness; he insisted on the necessity of
a dynamic life. The author cannot be called an artist of a particular style. Different plastic and intellectual
themes occur in his works of different types. He experiments in techniques of art.
In the compositions of the author, a devoted meditation is shown as the basic idea of religious life in Tibet.
Bludov riches a difficult task to depict spatial emptiness not as nature but as a spiritual and psychological
phenomenon. In the series “Sytszan”, metaphor reaches the limit of expressiveness and credibility. The metaphor
arises as a need of the artist in a short period of time (time constraints film, performances, and art).
In the same compositions. the painter depicts the world of human relations and cultural situations, a large
reservoir of life. Then he turns to the images-metaphors for installation. Metaphor is a working tool in the
works of Andrii Bludov. It meets the needs of modern outlook on the parallel introduction of countervailing
information into a single structural artwork unit.
The artist defines his own work as «border» on the verge of abstraction and internal realism in the sense
of mystical realism. In the works of Bludov, archetypes are images of characters that travel from one canvas
to another. The full artistic and intellectual information of Andrii Bludov’s paintings will open if the viewer
is ready to accept them on the sensory and mental levels
Quasispin models in quantum physics
No full textTitle: Quasispin models in quantum physics Author: Andrii Zymin Department: Institute of Particle and Nuclear Physics Supervisor: Mgr. Pavel Stránský, Ph.D., Institute of Particle and Nuclear Physics Abstract: The use of symmetries in quantum physics helps in a deeper understanding of physical systems and simplifies numerical calculations. This thesis studies models based on the SU(2) algebra, which, in spite of their apparent simplicity, show rather rich behavior and describe a wide spectrum of physical phenomena. We review various realizations of the SU(2) algebra (namely the spin, boson, and fermion realization) and present the most general quantum hamiltonian with one- and two-body interactions, constructed from the SU(2) generators. We perform the classical limit of the hamiltonian and show a numerical study of several particular examples. Keywords: dynamical symmetries, Lipkin model, su(2) algebra, quasispi
Patterning of Surfaces for Subsequent Roll Bonding in a Low-Oxygen Environment Using Deformable Mesh Inlays
No full textY. Frolov: ORCID 0000-0001-6910-6223; O. Bobukh: ORCID 0000-0001-7254-3854; A. Samsonenko: ORCID 0000-0001-6992-2327ENG: Efficient roll bonding for the manufacturing of clad strips not only requires surface activation but also is improved by a surface patterning to reduce the initial contact area. This increases contact stresses and facilitates a joining without an increasing rolling force. Experiments to pattern surfaces with deformable inlays during cold rolling for a subsequent bonding in low-oxygen atmosphere were carried out using two types of rolling mills, two types of inlays and two types of assemblies. Digital twins of selected experiments were created by means of the FE simulation software QForm UK 10.2.4. The main set of rolling parameters, which play a significant role during formation of the pattern shape considering deformation of the patterning tool, were investigated. The pilot roll bonding of patterned components under vacuum conditions, provided using vacuum sealer bags, allowed for an experimental realization of this approach. The concept technological chain of roll bonding in a low-oxygen or oxygen-free environment comprises the following stages: roll patterning; surface activation and sealing of the strips in a vacuum bag; subsequent roll bonding of the prepared strips inside the protective bag. The difference between the shape of the pattern created and the initial shape of the mesh insert can be quantitatively described by the change of its angle. This difference reaches maximum values when smaller rolls are used with increased rolling reductions. This maximum value is limited by the springback of the deformed insert; the limit is reached more easily if the inlay is not positioned on the rolling plane.Institut für Werkstoffkunde (Materials Science), Leibniz Universität Hannover, Hannover, German
Kvazispinové modely v kvantové fyzice
No full textNázev práce: Kvazispinové modely v kvantové fyzice Autor: Andrii Zymin Katedra: Ústav částicové a jaderné fyziky Vedoucí bakalářské práce: Mgr. Pavel Stránský, Ph.D., Ústavčásticové a jaderné fyziky Abstrakt: Využití symetrií v kvantové fyzice pomáhá k hlubšímu porozumění fyzikálních systémů a zjednodušuje numerické výpočty. Tato práce studuje modely založené na algebře SU(2), které i přes zdánlivou jednoduchost vykazují velmi bohaté chování a popisují široké spektrum fyzikálních jevů. Jsou shrnuty různé realizace algebry SU(2) (spinová, bosonová, fermionová). Je předložen nejobecnější tvar kvantového hamiltoniánu zkonstruovaného z generátorů SU(2), který zahrnuje všechny jednočásticové a dvoučásticové interakce, a jeho klasická limita. Několik konkrétních přikladů hamiltoniánu je detailně prezentováno numericky. Kličová slova: dynamické symetrie, SU(2) algebra, kvazispin, klasická limitaTitle: Quasispin models in quantum physics Author: Andrii Zymin Department: Institute of Particle and Nuclear Physics Supervisor: Mgr. Pavel Stránský, Ph.D., Institute of Particle and Nuclear Physics Abstract: The use of symmetries in quantum physics helps in a deeper understanding of physical systems and simplifies numerical calculations. This thesis studies models based on the SU(2) algebra, which, in spite of their apparent simplicity, show rather rich behavior and describe a wide spectrum of physical phenomena. We review various realizations of the SU(2) algebra (namely the spin, boson, and fermion realization) and present the most general quantum hamiltonian with one- and two-body interactions, constructed from the SU(2) generators. We perform the classical limit of the hamiltonian and show a numerical study of several particular examples. Keywords: dynamical symmetries, Lipkin model, su(2) algebra, quasispinÚstav částicové a jaderné fyzikyInstitute of Particle and Nuclear PhysicsMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Role povrchových defektů v katalýze na oxidech ceru
No full textNázev: Role povrchových defektů v katalýze na oxidech ceru Autor: Andrii Tovt Katedra: Katedra fyziky povrchů a plazmatu Vedoucí doktorské práce: doc. Mgr. Josef Mysliveček Ph.D., Katedra fyziky povrchů a plazmatu Abstract: Práce se zaměřuje na analýzu základních fyzikálně-chemických vlastností modelových katalyzátorů Pt/CeOx, atomárně dispergovaných Pt1 /CeOx a inverzních modelových katalyzátorů CeOx/Cu(111). Byla vyvinuta metoda přípravy stabilizovaných atomově dispergovaných iontů Pt2+ na povrchu oxidu ceru a adsorpční místa pro ionty Pt byla studována s využitím pokročilých technik fyziky povrchů podporovaných teoretickými metodami. Byl identifikovan mechanismus stabilizace Pt2+ na schodech oxidu ceru a byla určena jejích kapacita pro Pt2+ ionty. Také byl vyvinut způsob přípravy velmi dobře uspořádaných ultratenkých vrstev oxidu ceru s různou stechiometrií a uspořádání povrchových kyslíkových vakancí a byla zkoumána interakce CeOx/Cu(111). Klíčová slova: heterogenní katalýza, modelové systémy, katalýza jednotlivých atomů, ionty platiny, oxid ceru.Title: Role of surface defects in ceria-based catalysis Author: Andrii Tovt Department: Department of Surface and Plasma Science Supervisor of the doctoral thesis: doc. Mgr. Josef Mysliveček Ph.D., Department of Surface and Plasma Science Abstract: This work concentrates on the analysis of fundamental physicochemical properties of Pt-CeOx, single-atom Pt1 /CeOx, and inverse CeOx/Cu(111) catalysts. Preparation method for stabilized atomically-dispersed Pt2+ ions on ceria was developed and adsorption sites for Pt ions were thoroughly studied using advanced surface science techniques supported by theoretical methods. The mechanism of Pt2+ stabilization on ceria steps was revealed and the step capacity towards Pt2+ ions was estimated. Also, the preparation method for well-ordered cerium oxide ultrathin films with different stoichiometry and ordering of surface oxygen vacancies was developed, and the Ceria/Cu(111) interaction was investigated. Key words: heterogeneous catalysis, model systems, single-atom catalysis, platinum ions, cerium oxide.Katedra fyziky povrchů a plazmatuDepartment of Surface and Plasma ScienceFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult
Studium oxidace CO a metanolu za vysokého tlaku na katalyzátorech ve formě nanoprášků oxidů kovů vzácných zemin a tenkých vrstev na bázi platiny
No full textNázev práce: Studium oxidace CO a metanolu za vysokého tlaku na katalyzátorech ve formě nanoprášků oxidů kovů vzácných zemin a tenkých vrstev na bázi platiny Autor: Mgr. Andrii Rednyk Katedra / Ústav: Katedra fyziky povrchů a plazmatu Vedoucí doktorské práce: Prof. RNDr. Vladimír Matolín, DrSc. [email protected] Abstrakt: Tato práce se zaměřuje na studium katalytické aktivity oxidů kovů vzácných zemin (REO) ve formě nanoprášků a tenkých vrstev na bázi platiny s využitím mikroreaktoru s vysokotlakou reakční komorou. Nanočástice REO byly připraveny novým přístupem založeným na sol-gelové chemické metodě. Tenkovrstvé vzorky byly připraveny magnetronovým naprašováním. V první části je studována reakce oxidace oxidu uhelnatého (CO oxidation) na REO a na tenkých vrstvách Pt, PtOx. Z připravených nanopráškových oxidů kovů vzácných zemin vykazují velmi dobrou aktivitu oxidy ceru stabilizované aluminou, hlavně z důvodu většího aktivního povrchu.Vrstvy Pt i PtOx deponované na křemíkové podložky vykazuji srovnatelnou aktivitu. Když se jako podložka použije uhlík (grafitová folie nebo uhlíková mezivrstva), aktivita Pt vrstvy poklesne, kdežto PtOx si zachovává vysokou aktivitu. Obsahem druhé části je parní reformace metanolu (SRM) a částečná oxidace metanolu (POM) s katalyzátory na bázi tenkých vrstev s...Title: High pressure CO and methanol oxidation study over nanopowder Rare Earth Oxides and platinum thin film catalysts Author: Mgr. Andrii Rednyk Department: Department of Surface and Plasma Science Supervisor: Prof. RNDr. Vladimír Matolín, DrSc. [email protected] Abstract: This doctoral thesis focuses on reactivity study of nanopowder rare earth oxides (REOs) and platinum based thin film catalysts using microreactor with high pressure reaction cell. REOs nanoparticles were prepared by new approach based on sol-gel chemistry. Magnetron sputtering technique was used for preparation of thin film samples. In the first part of the thesis CO oxidation on REOs and on Pt, PtOx thin films were performed. Among prepared REOs catalyst better activity exhibited alumina stabilized ceria, due to higher surface area. Both Pt and PtOx deposited on silicon substrate exhibited similar activity. When carbon (G-foil or C interlayer) is used as support, activity of Pt thin film decreases while PtOx preserves high activity. In the second part of the thesis steam reforming of methanol (SRM) and partial oxidation of methanol (POM) were performed on Pt thin films. It was shown that PtOx thin film exhibited superior activity compared to other samples with the same thickness. It is due to the reduction of platinum...Katedra fyziky povrchů a plazmatuDepartment of Surface and Plasma ScienceMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Beyond Labeling: Using Clustering to Build Network Behavioral Profiles of Malware Families
No full textMalware family labels are known to be inconsistent. They are also black-box since they do not represent the capabilities of malware. The current state of the art in malware capability assessment includes mostly manual approaches, which are infeasible due to the ever-increasing volume of discovered malware samples. We propose a novel unsupervised machine learning-based method called MalPaCA, which automates capability assessment by clustering the temporal behavior in malware's network traces. MalPaCA provides meaningful behavioral clusters using only 20 packet headers. Behavioral profiles are generated based on the cluster membership of malware's network traces. A Directed Acyclic Graph shows the relationship between malwares according to their overlapping behaviors. The behavioral profiles together with the DAG provide more insightful characterization of malware than current family designations. We also propose a visualization-based evaluation method for the obtained clusters to assist practitioners in understanding the clustering results. We apply MalPaCA on a financial malware dataset collected in the wild that comprises 1.1 k malware samples resulting in 3.6 M packets. Our experiments show that (i) MalPaCA successfully identifies capabilities, such as port scans and reuse of Command and Control servers; (ii) It uncovers multiple discrepancies between behavioral clusters and malware family labels; and (iii) It demonstrates the effectiveness of clustering traces using temporal features by producing an error rate of 8.3%, compared to 57.5% obtained from statistical features.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Cyber SecurityOrganisation & Governanc
Determination of the deformation parameters of the steel reinforcing phase inside the aluminum matrix during hot rolling
No full textM. Nosko: ORCID 0000-0002-8792-4016; D. Konovodov: ORCID 0000-0001-8282-4991; A. Samsonenko: ORCID 0000-0001-6992-2327; O. Bobukh: ORCID 0000-0001-7254-3854ENG: Purpose. Comparison of deformation parameters during rolling of reinforced composites based on aluminum alloy using braided and expanded steel meshes as a reinforcing phase. Methodology. An experimental study on the effect of pressure on the deformation of the reinforcing phase during rolling of aluminum composites is carried out. A wire mesh and expanded mesh made of stainless steel was used as a reinforcing phase. The effect of deformation on the change in the lattice angle of the reinforcing phase is investigated. Findings. In this work, experimental data on the parameters of deformation of the wire mesh and expanded mesh are obtained. A comparison is made of the shape change in such grids under hot rolling conditions between two aluminum plates, which play the role of a matrix. It is found that the elongation coefficients of the lattice for the experiment with a wire mesh μc is equal to 1.68–2.3, which is greater than the coefficient of elongation of the lattice in the expanded mesh of 1.55–2.2. Therefore, expanded sheets make the best reinforcing layer for aluminumbased composites produced by the rollbonding process. Expanded mesh also reduces the risk of rupture at the intersection of wires. Originality. In the work, for the first time, a comparison of the deformation parameters during roll bonding of composites based on an aluminum alloy, reinforced with a braided and expanded steel mesh, has been given. Obtaining composite materials by means of hot roll bonding requires an understanding of the flow of composite components during deformation and their influence on each other. These peculiarities have not been studied sufficiently. Currently, there is no reliable method for predicting the behavior of the material of a solid reinforcing phase of various shapes inside a composite. Practical value. Advantages of using an expanded steel mesh for reinforcing aluminumbased composites have been confirmed. Scientific results can be used to refine calculating methods for metal flow at high hydrostatic pressure with variable components of the stress tensor and the major stresses.UKR: Мета. Порівняння параметрів деформації при прокатці армованих композитів на основі алюмінієвого сплаву з використанням в якості армуючої фази плетеної та просічновитяжної сталевої сітки. Методика. Виконано експериментальне дослідження впливу обтиснення на деформацію армуючої фази при прокатці алюмінієвих композитів. В якості армуючої фази використана плетена та просічновитяжна сітка з нержавіючої сталі. Досліджено вплив деформації на зміну кута гратки армуючої фази. Результати. У роботі отримані експериментальні дані стосовно параметрів деформації плетеної та просічновитяжної сітки. Проведене порівняння формозміни та ких сіток в умовах гарячої прокатки між двох алюмінієвих пластин, що відіграють роль матриці. Встановлено, що коефіцієнти видовження ґратки для експерименту із плетеною сіткою μc дорівнював 1,68–2,3 що більше, ніж коефіцієнт видовження ґратки із просічновитяжної сітки – 1,55–2,20. Тому, просічновитяжна сітка є кращою в якості армуючого шару для композитів на основі алюмінію, отриманих процесом прокатки–з’єднання. Також просічновитяжна сітка дозволяє зменшити ризик розриву в місцях перехрещення дротів. Наукова новизна. У роботі вперше наведене порівняння параметрів деформації під час прокатки–з’єднання композитів на основі алюмінієвого сплаву, армованих плетеною та просічновитяжною сіткою. Технологія виготовлення композиційних матеріалів із різними видами армуючого елемента за допомогою гарячого з›єднання прокаткою вимагає розуміння властивостей кожного елементу композиту в зоні деформації та їх впливу один на одного. Такі особливості ще не були достатньо досліджені. Тому, наразі, не існує надійного методу прогнозу вання поведінки жорсткої армуючої фази всередині м’якої алюмінієвої матриці. Практична значимість. Підтверджені переваги використання просічновитяжної сітки для армування композитів на основі алюмінію. Результати роботи можуть бути використані для уточнення методів розрахунку течії металу в умовах високого гідростатичного тиску зі змінними компонентами тензора напружень і головними напруженнями
Effectiveness of a program of the comprehensive correction of foot arch disorders in young athletes aged 7-8 years specialised in taekwon-Do I.T.F.
No full textDanyshchuk Andrii, Ivanyshyn Iryna. Effectiveness of a program of the comprehensive correction of foot arch disorders in young athletes aged 7-8 years specialised in taekwon-Do I.T.F. Journal of Education, Health and Sport. 2020;11(1):400-411. eISSN 2391-8306. DOI http://dx.doi.org/10.12775/JEHS.2021.11.01.040
https://apcz.umk.pl/czasopisma/index.php/JEHS/article/view/JEHS.2021.11.01.040
https://zenodo.org/record/5750656
The journal has had 5 points in Ministry of Science and Higher Education parametric evaluation. § 8. 2) and § 12. 1. 2) 22.02.2019.
© The Authors 2021;
This article is published with open access at Licensee Open Journal Systems of Nicolaus Copernicus University in Torun, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike.
(http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 03.01.2021. Revised: 28.01.2021. Accepted: 31.01.2021.
Effectiveness of a program of the comprehensive correction of foot arch disorders in young athletes aged 7-8 years specialised in taekwon-Do I.T.F.
Andrii Danyshchuk, Iryna Ivanyshyn
Vasyl Stefanyk Precarpathian National University
57, Shevchenka str., Ivano-Frankivsk, 76018; Ukraine; tel.: +380 (342) 59-60-12
Andrii Danyshchuk – PhD student, department of physical education and sport; https://orcid.org/0000-0002-6931-1080; e-mail: [email protected]
Iryna Ivanyshyn – Associate Professor of the Theory and Methodic of Physical Education Department, Faculty of Physical Education and Sport; https://orcid.org/0000-0003-1765-8311; e-mail: [email protected]
Abstract
Introduction. A number of scientists have proven the positive effect of taekwon-Do I.T.F. on the physical state of people of all ages, the state of their musculoskeletal system. However, in the scientific literature there is no data on the effectiveness of taekwon-Do I.T.F. use in the programs of correction of foot arch (FA) disorders of young athletes. Similarly, no studies have been conducted on the effect of taekwon-Do I.T.F. exercises on the development of myofacsical kinematic chain (MFKC) of the lower limb and its role in the foot maintenance and correction in foot arch disorders. The purpose is to experimentally test the effectiveness of a comprehensive program for the foot arch disorders correction of young athletes by means of taekwon-Do I.T.F. Material and method. The following instrumental methods were used in the work: plantography (baropodograph using computer device “DIERS FAAMUS” (Germany)); electroneuromyography ("Neuro-EMG-Micro" made by "Neurosoft" (Russia)); photometry; myotonometry; formative consistent pedagogical experiment; methods of statistical data processing (Statistics 6.0 (StatSoft, USA)). Young athletes aged 7–8 with FA disorders and a normal foot took part in a 12-month formative experiment. Results. The value of the Friedland index, which characterizes the functional foot reserves, increased statistically significantly among EG1 young athletes who practiced according to the program developed by us, compared with those who were training according to the traditional program – by 6.48% against 3.85%, respectively. Conclusions. Analysis of FA morphological parameters of young athletes aged 7-8 years shows that the positive changes are statistically significantly more performed in young athletes who were training in the sports center "Taekwon-Do I.T.F." on a program of comprehensive correction, which is confirmed by FA changes.
Key words: taekwon-do; juniors; foot arch disorder
To Memory of A. M. Krasnov (1862-1914)
No full textСтаття присвячена життю і науковій діяльності Андрія Миколайовича Краснова – видатного фізико-географа, геоботаніка і мандрівника, дослідника території Сумщини, автора понад 300 наукових праць.The article is devoted to the life and scientific work of Andrii Mykolaiovych Krasnov – outstanding physical geographer, geobotanist and traveler, explorer of territory of the Sumy region, the author of over 300 scientific papers
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