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Готові списки джерел за темами / Circular Formation / Статті в журналах

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Статті в журналах з теми "Circular Formation"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Zilun, Hu, and Yang Jianying. "Distributed efficiency-based circular formation for the unmanned air vehicles detection system." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 9 (2018): 3223–34. http://dx.doi.org/10.1177/0954410018793764.

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Анотація:

This paper considers on the general circumnavigation problem for a team of vertical takeoff and landing unmanned air vehicles, with the goal of achieving specific circular formations and circling centered at a target of interest. Different from the traditional circular formation problem, in this paper, not only the formation but also the detection efficiency of the formation is taken into consideration. A novel distributed optimal circular formation algorithm is proposed. According to this algorithm, the circular formation can be guaranteed with the optimal radius that can optimize the team pe

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2

Moreno Arboleda, Francisco Javier, Jaime Alberto Guzmán Luna, and Sebastian Alonso Gomez Arias. "Identification of V-Formations and Circular and Doughnut Formations in a Set of Moving Entities with Outliers." Abstract and Applied Analysis 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/241684.

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Diverse movement patterns may be identified when we study a set of moving entities. One of these patterns is known as a V-formation for it is shaped like the letter V. Informally, a set of entities shows a V-formation if the entities are located on one of their two characteristic lines. These lines meet in a position where there is just one entity considered the leader of the formation. Another movement pattern is known as a circular formation for it is shaped like a circle. Informally, circular formations present a set of entities grouped around a center in which the distance from these entit

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3

Алиев, О. М. "Formation of a circular economy." Экономика и предпринимательство, no. 9(134) (December 17, 2021): 318–22. http://dx.doi.org/10.34925/eip.2021.134.9.052.

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В статье рассматриваются исторические события, связанные с циркулярной экономикой и предшествующие ее появлению. Определены концепции экономики энвайроментализма, имеющие одну общую глобальную цель - устойчивое развитие и повышение благосостояния общества. Рассмотрены основные этапы формирования понимания у людей, что сохранение экологии является одной из ключевых целей. Выделены базовые принципы циркулярной экономики. Выгоды от внедрения экономики замкнутого цикла существенно превышают негативные внешние эффекты. Рассмотренные уровни, на которых может реализовываться экономика замкнутого цикл

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4

Litimein, Hamida, Zhen-You Huang, and Ameer Hamza. "A Survey on Techniques in the Circular Formation of Multi-Agent Systems." Electronics 10, no. 23 (2021): 2959. http://dx.doi.org/10.3390/electronics10232959.

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Distributed control solutions to the multi-agent systems in terms of coordination, formation, and consensus problems are extensively studied in the literature. The circular formation control of multi-agent systems becomes one of the most challenging and active research topics in distributed cooperative control. The research potential of circular formation control has grown especially in satellite formation and control. The circular formation control aims to drive a group of agents to move on a circular trajectory around a center with spacing adjustment to avoid the collision. This paper covers

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5

He, Li Li, and Xiao Chun Lou. "Study on the Formation Control Methods for Multi-Agent Based on Geometric Characteristics." Advanced Materials Research 765-767 (September 2013): 1928–31. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.1928.

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Multi-agent formation control is the process in which the teams formed by multiple agents move to specific target or specific direction. The formation method of the linear formation and circular formation are given in this paper, based on the geometric characteristics of the formation formed by multi-agent. The process in which 5 agents arrived at the designated target point and formed a linear formation is achieved through simulation; and 4 agents formed a circular formation and cooperated to carry heavy weights. The result of the three-dimensional simulation shows the feasibility of the meth

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6

Nabil, M. Hewahi; Abed Alkader A. Almobayed. "BRAIN Journal - Swarm Robotics with Circular Formation Motion Including Obstacles Avoidance." BRAIN: Broad Research in Artificial Intelligence and Neuroscience 8, no. 2 (2017): 125–43. https://doi.org/10.5281/zenodo.1045129.

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ABSTRACT The robots science has been developed over the past few years, where robots have become used to accomplish difficult, repetitive or accurate tasks, which are very hard for humans to carry out. In this paper, we propose an algorithm to control the motion of a swarm of robots and make them able to avoid obstacles. The proposed solution is based on forming the robots in circular fashion. A group set of robots consists of multiple groups of robots, each group of robots consists of robots forming a circular shape and each group set is a circular form of robots. The proposed algorithm is co

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7

Palacios, Antonio, Gemunu H. Gunaratne, Michael Gorman, and Kay A. Robbins. "Cellular pattern formation in circular domains." Chaos: An Interdisciplinary Journal of Nonlinear Science 7, no. 3 (1997): 463–75. http://dx.doi.org/10.1063/1.166218.

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8

Chen, Wenwen, Xiaowei Shao, and Dengping Duan. "Circular Formation Design for LL-SST." Chinese Journal of Space Science 30, no. 6 (2010): 547. http://dx.doi.org/10.11728/cjss2010.06.547.

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9

A. Gureva, Maria, and Yulia S. Deviatkova. "Formation of the Concept of a Circular Economy." Sistemas & Gestão 15, no. 2 (2020): 156–69. http://dx.doi.org/10.20985/1980-5160.2020.v15n2.1656.

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Анотація:

The article represents a historical survey that describes the emergence and development of the circular economy as an independent concept and its interconnection to the phenomenon of new industrialization. The variety of definitions of the concept “circular economy” given by Russian and foreign scientists are provided in the article; basic approaches to the concept formation are determined. The comparative analysis of basic concepts related to the environmentalism (sustainable development, ecologization, green economy, circular economy) was carried out. The evolutionary development of ecologic

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10

Aliyev, Alovsat, and Roza Shahverdiyeva. "FORMATION OF A DIGITAL CIRCULAR ECONOMY ON THE INDUSTRY 4.0 PLATFORM." Problems of Information Society 14, no. 2 (2023): 3–14. http://dx.doi.org/10.25045/jpis.v14.i2.01.

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This article analyzes a circular economy, its digitization features and development models. It interprets the digitalization of the circular economy in the context of green development concepts. The article shows the importance of increasing resource efficiency and stimulating the use of renewable resources in the transition process of enterprises to the green and circular economy. The importance of reducing waste generation through prevention, reduction, recycling and reuse, and production is emphasized. The international experience on the development of the digital circular economy, various

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11

Zhou, Ziye, Jincun Liu, Shihan Kong, and Junzhi Yu. "A Circular Formation Method for Biomimetic Robotic Fish Inspired by Fish Milling." Biomimetics 8, no. 8 (2023): 583. http://dx.doi.org/10.3390/biomimetics8080583.

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Circular motion phenomena, akin to fish milling, are prevalent within the animal kingdom. This paper delineates two fundamental mechanisms underlying such occurrences: forward following and circular topological communication. Leveraging these pivotal concepts, we present a multi-agent formation circular model based on a second-order integrator. This model engenders the attainment of homogeneous intelligence convergence along the circumferential trajectory. The convergence characteristics are intricately linked to the number of agents and the model parameters. Consequently, we propose positive

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12

Ye Yan, Chao Li, and Yue-neng Yang. "Simulation on Spacecraft Formation Flight and Formation Reconfiguration." MATEC Web of Conferences 160 (2018): 05011. http://dx.doi.org/10.1051/matecconf/201816005011.

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Spacecraft formation flight refers to two or more spacecraft according to a certain formation or arrangement of flight, it has important application value for deep spatial exploration, spatial science experiment, ground investigation and military and so. This paper studies the spacecraft formation flight design and formation reconfiguration based on STK. Firstly, the Clohessy-Wiltshire (CW) equation is used to describe the relative motion of the near-circular orbit and deduce the relative orbital dynamics model. Then, based on the dynamic method of the CW equation, the spatial circular formati

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13

Tabatadze Lasha, Tabatadze Lasha. "Circular Economy, Problems and Challenges." New Economist 16, no. 03 (2022): 28–32. http://dx.doi.org/10.36962/nec62-6303-042021-16.

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Анотація:

The article presents a broad overview covering the importance and formation of the circular economy as an independent concept, and its relationship with the phenomenon of new industrialization. A variety of interpretations of the concept of "circular economy" (foreign authors) is considered, the main approaches to its formation are determined. A comparative analysis of the main concepts of environmentalism economics (sustainable development, greening, green economy, circular economy) is carried out according to key features. The evolutionary development of the generating imperatives principles

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14

El-Hawwary, Mohamed I., and Manfredi Maggiore. "Distributed Circular Formation Stabilization for Dynamic Unicycles." IEEE Transactions on Automatic Control 58, no. 1 (2013): 149–62. http://dx.doi.org/10.1109/tac.2012.2206720.

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15

Lobovkina, Tatsiana, Paul Dommersnes, Jean-Francois Joanny, and Owe Orwar. "Formation and release of circular lipid nanotubes." Soft Matter 4, no. 3 (2008): 467–70. http://dx.doi.org/10.1039/b715771a.

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16

MENG, Yunhe, and Jinhai DAI. "Satellite Formation Establishing in Near Circular Orbit." Chinese Journal of Space Science 26, no. 2 (2006): 148. http://dx.doi.org/10.11728/cjss2006.02.148.

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17

NEUFELD, M., and R. FRIEDRICH. "PATTERN FORMATION IN ROTATING BÉNARD CONVECTION." International Journal of Bifurcation and Chaos 04, no. 05 (1994): 1155–63. http://dx.doi.org/10.1142/s021812749400085x.

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Using a model equation we study pattern formation in rotating, high Prandtl-number Bénard convection in circular geometry and in a rectangular vessel with periodic boundary conditions. We report on drifting pattern, defect motion, Küppers-Lortz instability and domain wall turbulence. In circular geometry we observed spiral patterns which disappear and reappear in the Küppers-Lortz unstable regime. We define a pattern entropy for the patterns and show that this quantity is related to the Nusselt number.

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18

Naboka, R. "STATE POLICY OF THE FORMATION OF A CIRCULAR ECONOMY." East European Scientific Journal 2, no. 7(71) (2021): 15–19. http://dx.doi.org/10.31618/essa.2782-1994.2021.2.71.87.

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Анотація:

The research of the state policy of forming a circular economy is conducted in the article. In particular, a list of measures in the economy is defined, the implementation of which is supposed to be within the framework of the transition to a circular economy; the specifics of behavior with by-products of production is identified; the conditions for the formation of a circular economy in Ukraine are highlighted. It is emphasized that activities in the economy, the introduction of which is supposed to be within the framework of the transition to a circular economy, are conditionally divided int

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19

Abuselidze, George, and Gia Zoidze. "Circular Economy: A Modern Concept of Sustainable Development." E3S Web of Conferences 585 (2024): 11012. http://dx.doi.org/10.1051/e3sconf/202458511012.

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Анотація:

The research covers the emergence and formation of the circular economy as an independent concept and its relationship with the phenomenon of new industrialization. The paper analyses the variety of interpretations of the “circular economy” concept; The main approaches to its formation are defined. The evolutionary development of the main principles of concept formation is studied; Characteristics, current situation, and general perspectives of development are described. In addition, the article reveals the mechanisms by which a circular economy can be successfully introduced in the modern wor

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20

Khomenko, Inna, Marina Vuychenko, Maryna Gomeniuk, Yurii Mazur, and Oksana Haidai. "Imperatives for the formation and development of the circular economy and global waste management." E3S Web of Conferences 255 (2021): 01034. http://dx.doi.org/10.1051/e3sconf/202125501034.

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The world ecological problem of waste accumulation, environmental pollution and the need to develop a circular economy are described. The aim of the article is to show the advantage of using a circular economy in the management of the national economy. It is substantiated that resource management should radically change from a linear model of accept-use-dispose to a more stable, circular model. It is proved that the principles of circular economy are not based on the management of material and waste flows, but on more valuable methods, such as maintenance, recycling and reuse. Different models

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21

Terletska, Myroslava. "Formation of enterprise development strategy in a closed-loop economy." Actual problems of innovative economy and law 2025, no. 1 (2025): 101–6. https://doi.org/10.36887/2524-0455-2025-1-25.

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The article is devoted to the features of formation of the enterprise development strategy in the conditions of the circular economy. The aim of the article is to study the process of elaborating a development strategy for an enterprise, considering the key principles of the circular economy in the context of transformation of the economic environment. The article presents the interpretation of the term “strategy” and highlights several approaches for better understanding it: strategy as a plan, strategy as a development vector and strategy as synergy. The views of scientists on the definition

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22

Strapchuk, S. "Consideration of the circular economy principles in the formation of enterprise business model." Galic'kij ekonomičnij visnik 69, no. 2 (2021): 62–68. http://dx.doi.org/10.33108/galicianvisnyk_tntu2021.02.062.

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The role of conceptual business model of an enterprise and its adaptability to the principles of the circular economy are investigated in this paper. It is determined that the idea of closed-loop economy is not new, but lately it has become popular due to political support of individual countries and international non-governmental organizations. In particular, in Germany, China and Japan the guidelines concerning circular economy are being developed at the national level. The main principles of the circular economy, which include the processes of recovery, sharing, optimization, cyclicality, v

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23

Huo, Mengzhen, Haibin Duan, and Yanming Fan. "Pigeon-Inspired Circular Formation Control for Multi-UAV System with Limited Target Information." Guidance, Navigation and Control 01, no. 01 (2021): 2150004. http://dx.doi.org/10.1142/s2737480721500047.

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The problem of cooperative circular formation with limited target information for multiple Unmanned Aerial Vehicle (UAV) system is addressed in this paper. A pigeon-inspired circular formation control method is proposed to form the desired circular distribution in a plane based on the intelligent pigeon behavior during hovering. To reach the goal of prescribed radius and angular distribution, the controller is designed consisting of a circular movement part and a formation distribution part. Therein, the circular movement part is designed to make each UAV rotate around the specified circle at

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24

Ilia, Gheorghe, Vasile Simulescu, and Iosif Hulka. "Hybrids containing zirconium and phosphorus compounds obtained by sol-gel method." COLLOID AND POLYMER SCIENCE 299, no. 1 (2021): 137–51. https://doi.org/10.5281/zenodo.13365916.

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In the present work, novel organic-inorganic hybrids containing zirconium and phosphorus compounds were synthesized by using the sol-gel method, starting from zirconyl chloride hexahydrate (ZrOCl2 center dot 6H(2)O) and phenyl phosphonic acid (PPA). All the syntheses were performed at room temperature by using water as solvent. For some of the performed syntheses, alcohols with long hydrocarbon chain (n = 4-8) were added to the sol-gel process. They behave as nonionic surfactants due to their hydrophobic and hydrophilic groups, and they decrease the surface tension but without micelles formati

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25

Gorbunova, Vera, and Avraham A. Levy. "Circularized Ac/Ds Transposons: Formation, Structure and Fate." Genetics 145, no. 4 (1997): 1161–69. http://dx.doi.org/10.1093/genetics/145.4.1161.

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The maize Ac/Ds transposable elements are thought to transpose via a cut-and-paste mechanism, but the intermediates formed during transposition are still unknown. In this work we present evidence that circular Ac molecules are formed in plants containing actively transposing elements. In these circles, transposon ends are joined head-to-head. The sequence at the ends' junction is variable, containing small deletions or insertions. Circles containing deleted Ac ends are probably unable to successfully reintegrate. To test the ability of circles with intact transposon ends to integrate into the

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26

Vasylchak, Svetlana, Oleksandra Zhydiak, Serhiy Soloviy, and Olha Vivcharuk. "Investment strategy for the development of production activities of enterprises in the conditions of the circular economy." Market Relations Development in Ukraine 119, no. 11(282) (2025): 32–38. https://doi.org/10.5281/zenodo.14824889.

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The subject of the study is the theoretical and methodological aspects of the formation of an investment strategy for the development of the production activity of enterprises under the conditionsof a circular economy.The purpose of the study is to outline the economic essence of the formation of an investment strategyfor the development of production activities of enterprises under the conditions of a circular economy,taking into account scientific approaches and prospects for the development of entrepreneurship.Research methods. The research used a set of scientific methods and approaches, i

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27

ROMANOVA, Ol’ga Aleksandrovna, and Dmitriy Vladimirovich SIROTIN. "Processing of technogenic formations within the framework of the formation of a circular economy." NEWS of the Ural State Mining University, no. 4 (December 20, 2020): 183–93. http://dx.doi.org/10.21440/2307-2091-2020-4-183-193.

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Relevance. Formation of a circular economy assumes a special place among the new realities that fundamentally affect new technological trends in industrial development. Although the concept of this economy is at the stage of formation, many developed countries, primarily the EU countries, necessarily include it in the most important strategic documents for the development of their countries provisions related to the key principles of a circular economy. The strategic planning system in Russia also includes documents based on the use of individual principles of this economy, contains the develo

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28

Ospanova, A. K., and D. I. Zakirova. "Environment policy in the formation of circular economy." Bulletin of "Turan" University, no. 3 (October 7, 2021): 180–86. http://dx.doi.org/10.46914/1562-2959-2021-1-3-180-186.

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29

Chan, Nelson P. K., Bayu Jayawardhana, and Hector Garcia de Marina. "Angle-Constrained Formation Control for Circular Mobile Robots." IEEE Control Systems Letters 5, no. 1 (2021): 109–14. http://dx.doi.org/10.1109/lcsys.2020.3000061.

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30

Carlin, E. S. "Formation and morphology of anomalous solar circular polarization." Astronomy & Astrophysics 627 (July 2019): A47. http://dx.doi.org/10.1051/0004-6361/201935182.

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Context. The morphology of spectral line polarization is the most valuable observable to investigate the magnetic and dynamic solar atmosphere. However, in order to develop solar diagnosis, it is fundamental to understand the different kinds of anomalous solar signals that are routinely found in linear and circular polarization (LP,CP). Aims. We aim to explain and characterize the morphology of solar CP signals considering nonlocal thermodynamical equilibrium (NLTE) effects. Methods. An analytical two-layer model of the polarized radiative transfer equation is developed and used to solve the N

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31

Blandford, Roger D., and Israel Kovner. "Formation of arcs by nearly circular gravitational lenses." Physical Review A 38, no. 8 (1988): 4028–35. http://dx.doi.org/10.1103/physreva.38.4028.

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32

Vaghefi, Mohammad, Masoud Ghodsian, and Saeid Salimi. "Scour Formation Due to Laterally Inclined Circular Pier." Arabian Journal for Science and Engineering 41, no. 4 (2015): 1311–18. http://dx.doi.org/10.1007/s13369-015-1920-6.

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33

Zoli, Marco. "Helix untwisting and bubble formation in circular DNA." Journal of Chemical Physics 138, no. 20 (2013): 205103. http://dx.doi.org/10.1063/1.4807381.

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34

Banerjee, Avisekh, Hsi-Yung Feng, and Evgueni V. Bordatchev. "Geometry of chip formation in circular end milling." International Journal of Advanced Manufacturing Technology 59, no. 1-4 (2011): 21–35. http://dx.doi.org/10.1007/s00170-011-3478-0.

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35

Nikitaeva, Anastasia, and Olga Shestopalova. "Formation Mechanism of Circular Economy: Theoretical Aspects and Practice in South of Russia." Regionalnaya ekonomika. Yug Rossii, no. 4 (December 2023): 170–81. http://dx.doi.org/10.15688/re.volsu.2023.4.15.

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Анотація:

Currently, one of the priority concepts that can act as a theoretical platform for the sustainable development of the national economic system is the circular economy. Despite all the theoretically substantiated and practice-confirmed advantages, the practical implementation of a circular economy requires the presence of an effective mechanism for the formation of this economic model. For the Russian economy, it is advisable to study such a mechanism at the level of the regional economy. Taking this into account, the study determined the content of the mechanism for forming a circular economy.

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36

Zedadra, Amina, Yacine Lafifi, and Ouarda Zedadra. "Dynamic Group Formation based on a Natural Phenomenon." International Journal of Distance Education Technologies 14, no. 4 (2016): 13–26. http://dx.doi.org/10.4018/ijdet.2016100102.

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Анотація:

This paper presents a new approach of learners grouping in collaborative learning systems. This grouping process is based on traces left by learners. The goal is the circular dynamic grouping to achieve collaborative projects. The proposed approach consists of two main algorithms: (1) the circular grouping algorithm and (2) the dynamic grouping algorithm (used to update groups). The circular grouping is a novel algorithm to group learners based on their learning and collaborative traces. So, the aim is to form heterogeneous groups based on their profiles. The dynamic grouping algorithm is base

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37

Serikbayev, Ye A., S. S. Seitzhanov, N. S. Suleymanov, P. A. Tanzharikov, and N. A. Abildaev. "The effect of the distance between the trunks of horizontal oil wells on their productivity." Neft i Gaz 140, no. 2 (2024): 81–92. http://dx.doi.org/10.37878/2708-0080/2024-2.08.

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The article deals with a uniform fan arrangement on a circular formation with different distances from its center to the entrance to the formation of the initial section of horizontal trunks. This problem was solved by creating a geological and mathematical model of a circular formation drained by horizontal wells of different lengths and working with the same depression on the formation. When horizontal wells are fanned out on a circular formation, their productivity is significantly affected by the distance from the center of the circle to the entrance of the trunk into the productive format

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38

Lai, Xian, Liyuan Liu, and Xiaoran Peng. "Research on azimuth-only passive positioning of UAV formation: A case study of circular formation." Highlights in Science, Engineering and Technology 53 (June 30, 2023): 252–57. http://dx.doi.org/10.54097/hset.v53i.9736.

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In order to maintain the formation, the position of Drones cluster can be adjusted by the method of azimuth-only passive positioning. In this paper, the circular formation is taken as an example. Firstly, when the coordinate information of Drones at the center of the circle and around the circle is known, the coordinates of other Drones are solved according to the Angle signal. By using polar coordinate programming, the Angle between different Drone lines is calculated, and using this information as known information, the nonlinear equations are solved by inverse derivation of their own coordi

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ZVARYCH, Iryna. "STRATEGIC PRIORITIES OF CIRCULAR ECONOMY ROAD MAP IMPLEMENTATION IN UKRAINE." WORLD OF FINANCE, no. 4(65) (2021): 23–38. http://dx.doi.org/10.35774/sf2020.04.023.

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Introduction. The declaration of the sustainable development goals and the conclusion of the Paris agreement on climate change have radically changed the existing approaches to the use of natural resources, which has led to the formation of principles for the formation of safe and sustainable development of society. The linear model of the economy is exhausting its potential, necessitating the transition to a circular economy. A circular economy based on a systematic approach to the efficient use of end-of-life resources, products and materials is not discarded, but is recycled, repaired or re

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40

ERZNKYAN, Bagrat A., and Karine A. FONTANA. "The circular economy in the water sector: Elements, processes, recommendations." Economic Analysis: Theory and Practice 20, no. 6 (2021): 990–1013. http://dx.doi.org/10.24891/ea.20.6.990.

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Subject. We study the main processes, characterizing the circular economy in the water sector. Objectives. The purpose is to research issues related to circular economy, including the water reuse, to develop proposals for the formation of a roadmap for the transition to a circular economy model. Methods. The study employs analytical and logical methods, theoretical insights into the analysis of processes related to the circular economy, and practical works of countries on the formation of a roadmap for transition to a circular economy model. Results. The paper concludes on strengths and weakne

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41

Zvarych, I. Y. "Determinants of the Formation of a Global Inclusive Circular Economy." Business Inform 1, no. 516 (2021): 40–48. http://dx.doi.org/10.32983/2222-4459-2021-1-40-48.

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The transitive path of transition from linear to circular economy is marked by a change in the positioning of global risks from year to year, which is strictly defined by the determinants of such a change. Thus, the main risks for 2020 according to the World Economic Forum are those related to the environment and occupy the first positions in the ranking for the last three years (in particular, in 2019, the most influential was the risk of extreme weather events). A gradual increase in awareness of this risk has led to a change in the moods of both manufacturers and consumers. Experts assessed

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42

Ilmeneva, Veronika A. "Formation of the concept of the draft law "On building a circular economy"." Izvestiya of Saratov University. Economics. Management. Law 25, no. 1 (2025): 81–86. https://doi.org/10.18500/1994-2540-2025-25-1-81-86.

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Introduction. Involvement of waste in a circular economy requires independent legal regulation. At the same time, the linear economy is losing its relevance due to the development of a circular economy, therefore it is necessary to develop the legal basis for the circular economy. Empirical analysis. Legal regulation of the circular economy can be formalized as an independent normative legal act, which is preceded by a number of prerequisites, namely: an ambiguous concept of production and consumption waste, the absence of a number of criteria for determining a by-product, a secondary resource

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43

Wang, Da Zhi, and R. A. Dorey. "Formation of PZT Thick Film Single Elements Using EHDA Deposition." Materials Science Forum 628-629 (August 2009): 405–10. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.405.

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In this paper, electrohydrodynamic atomization combined with a polymeric micromoulding technique was used to form PZT single element devices using a PZT sol-gel slurry without an etching process. The PZT single element device was initially designed to work as a piezoelectric ultrasonic transducer consisting of a circular or a square of various sizes, which was produced and used to evaluate the process. The resulting PZT device had a homogenous microstructure. It was observed that the relative permittivity of the circular and square single element devices was especially high at small size due t

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44

Trushkina, Nataliia. "Circular Economics: Concept Formation, Evolution of Development, Barriers, Problems and Prospects." Herald of the Economic Sciences of Ukraine, no. 1(40) (2021): 9–20. http://dx.doi.org/10.37405/1729-7206.2021.1(40).9-20.

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The article examines the evolution and preconditions for the formation, challenges and factors of the circular economy. The existing scientific approaches to the definition of “circular economy” are analyzed and generalized. It is proposed to consider the term “circular economy” from three positions: as a modern paradigm of development of logistics systems; strategic direction of sustainable development; economic model, which is based on the technology of recycling industrial waste in order to achieve sustainable operation of business models in the national economy. The statistical analysis of

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45

Mujalde, Vikram Singh, Dinesh Kumar Barolia, Pradeep Gupta, Sunil Mehra, and Arun Gupta. "A prospective study in esophageal atresia with tracheoesophageal fistula: Oblique versus circular anastomosis." International Surgery Journal 5, no. 5 (2018): 1894. http://dx.doi.org/10.18203/2349-2902.isj20181605.

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Background: Congenital esophageal atresia with tracheo-esophageal fistula is a common congenital anomaly facing at our centre. There is various proposed anastomotic technique to avoid post-op stricture. In this study we compare outcome of oblique and circular anastomosis technique at our centre.Methods: This study conducted in 60 cases of congenital esophageal atresia with tracheo-esophageal fistula, designed randomly in two groups. Oblique anastomosis in group A and Circular anastomosis in group B. The complications of anastomotic leaks, anastomotic narrowing with strictures and recurrent fis

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46

ORIEKHOVA, Tetiana. "CIRCULAR ECONOMY AS A GLOBAL IMPERATIVE." Vol 18, No 4 (2019) 18, Vol 18, No 4 (2019) (2019): 415–24. http://dx.doi.org/10.35774/jee2019.04.415.

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The idea of the circular economy is conceptualized as the basic transformative, integrative philosophy, which is the basis of ecological and economic policy of public-private partnership. It is found that the intensification of competition for resources leads to increased waste production and pollution, which led to the formation of an economic system. Its components are renewable energy sources, increased production of waste from production waste, minimization of food waste and improving the quality of life of all segments of society. All successful micro-industries have been found to be the

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47

Lingaitienė, Olga, and Aurelija Burinskienė. "Formation the links between circularity and sustainability in the circular economy." Logistics, Supply Chain, Sustainability and Global Challenges 14, no. 1 (2023): 1–20. http://dx.doi.org/10.2478/jlst-2023-0010.

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Abstract Nowadays, many new questions arise regarding the creation and setting of goals for a sustainable circular economy. The study focused on exploring the connections between the concepts of circularity and sustainability in the circular economy. Sustainability aspects integrated into long-term circular economy processes have a clear impact on the environment, the economy and political decisions. The study examines the factors that contribute to and influence the formation of the circular economy and reveals the connection between circularity and sustainability. After reviewing the literat

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48

Umer, Muhammad, Naureen Anwar, Mustansar Mubeen, et al. "Circular RNAs: Diversity, formation, functions, and identification mechanism with a focus on endogenous circular RNAs." Physiological and Molecular Plant Pathology 139 (September 2025): 102800. https://doi.org/10.1016/j.pmpp.2025.102800.

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Nesiolovskaya, Tatiana, and Alina Uppina. "The global experience of the formation and development of the circular economy." Theoretical economics, no. 12 (December 30, 2024): 76–85. https://doi.org/10.52957/2221-3260-2024-12-76-85.

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It is shown that one of the drivers of stable economic development in developed countries is the transition to a circular model based on the principle of «three R’s» - reduce, reuse and recycle. The transition to a circular economy, as shown by the best world practices, is the basis for increasing the competitiveness of the country and improving the quality of life of the population, through the priority development of high-tech industries, efficient use of available resources, waste recycling and production of goods from recycled materials, reducing negative environmental impacts. As of 2024,

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Tan, Chin Joo. "End Formation of a Round Tube into a Square Section with Reduced Forming Loads." Applied Mechanics and Materials 395-396 (September 2013): 945–48. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.945.

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Low formation loads are desirable in metal stamping industries as it reduces the press capacity of the machine and the tooling cost. In the previous study, the author had successfully developed a 2-stage end formation process of a round tube into a square section having small corner radii. However, the formation load in this process increased linearly with the punch stroke in the 1st stage due to the continuous expansion of the tube end by the conical die. Hence, buckling and cracks occurred at the circular section and the bottom end of the square section respectively when the punch stroke was

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