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Charlotte Wehner, Bradley Shirley, Garrett Mathesen, Julian Merrick, Brandon Weatherford and Emilio Alessandro Nanni
The manufacturing of active RF devices like klystrons is dominated by expensive and time-consuming cycles of machining and brazing. In this article, we characterize the RF properties of X-band klystron cavities and an integrated circuit manufactured with...
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Polina Buyvol, Irina Makarova, Aleksandr Voroshilov and Alla Krivonogova
The increasing complexity of vehicle design, the use of new engine types and fuels, and the increasing intelligence of automobiles are making it increasingly difficult to ensure trouble-free operation. Finding faulty parts quickly and accurately is becom...
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Charalampos Papakonstantinou, Georgios Moraitis, Vaios Lappas and Vassilis Kostopoulos
In this paper, a low-cost, miniature spacecraft attitude control simulator is presented for testing miniature actuators such as Nano Control Moment Gyroscopes (CMGs) for simple maneuvers. The experimental setup is composed by an attitude control system (...
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Shindume Lomboleni Hamukwaya, Huiying Hao, Zengying Zhao, Jingjing Dong, Tingting Zhong, Jie Xing, Liu Hao and Melvin Mununuri Mashingaidze
The recent rapid development in perovskite solar cells (PSCs) has led to significant research interest due to their notable photovoltaic performance, currently exceeding 25% power conversion efficiency for small-area PSCs. The materials used to fabricate...
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Song Zhang, Anne Jahn, Lucas Jauer and Johannes Henrich Schleifenbaum
Laser powder bed fusion (LPBF) is a promising technique used to manufacture complex geometries in a layer-wised manner. Radiation during the LPBF process is influenced by the part geometry, e.g., the overhang angle and the wall thickness. Locally varying...
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Neill J. Turner
The present Special Issue comprises a collection of articles addressing the many ways in which extracellular matrix (ECM), or its components parts, can be used in regenerative medicine applications. ECM is a dynamic structure, composed of a three-dimensi...
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Edgars Kirilovs, Inga Zotova, Stanislavs Gendelis, Hans Jörg-Gusovius, Silvija Kukle and Veneranda Stramkale
Phase change materials (PCMs) are now widely known as potential additives for building insulation materials to provide a thermal mass effect that helps conserve energy and maintain a comfortable indoor temperature. Therefore, the study presented in this ...
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Nelli Ismailova,Valentyn Bogach,Borys Lebedev
Pág. 17 - 22
This paper reports a technique for constructing a geometric shape of the surface of contact between the interacting conjugated machine elements using computer technology. A subprogram has been developed in the MATLAB software package.The comprehensive so...
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Emin Musa Afandiyev,Mahamadali Nuraddin Nuriyev
Pág. 47 - 51
An analysis of the discarded drill pipes that had been used in wedge grips has revealed that the main reason for pipe rejection is the reduction of a pipe wall as a result of plastic deformations, due to damaging the pipe surface by the die teeth. The lo...
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Gennadii Golub,Nataliya Tsyvenkova,Viacheslav Chuba,Anna Holubenko,Marina Tereshchuk
Pág. 51 - 59
The study object: group unification of designs of process machines and appliances. Unification is one of important means of improving efficiency of production and operation of assemblies (parts) which reduces cost of their manufacture and repair. Unifica...
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