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Xiaochuan Jiang, Jun Wang, Ying Zhang and Shenxue Jiang
This paper reports on investigations of the air-coupled ultrasonic (ACU) method to detect common defects in solid timber panels made of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.). The ACU technology is a non-contact method for nondestructive tim...
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Touraj Farsadi, Majid Ahmadi, Melin Sahin, Hamed Haddad Khodaparast, Altan Kayran and Michael I. Friswell
In the field of aerospace engineering, the design and manufacturing of high aspect ratio composite wings has become a focal point of innovation and efficiency. These long, slender wings, constructed with advanced materials such as carbon fiber and employ...
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Bohumil Adamec, Juraj Machaj and Peter Brida
In the paper, a novel design of a wideband power splitter for a four-element antenna array using two RF antiphase segments is proposed. Based on a detailed analysis of the power splitter circuit, an analytical model was set up in the MATLAB environment. ...
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Jongyoung Youn, Kyeongtae Jeong, Jihye Kim, Hyekwon Kim and Donghoon Lee
FCP (Free-form Concrete Panel) is used to easily realize the huge and complex curved surfaces of free-form buildings, and research on FCP manufacturing technology is being conducted. However, as the concrete was extruded manually into the manufactured mo...
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Luciano Macera, Daniele Pullini, Alberto Boschetto, Luana Bottini, Claudio Mingazzini and Gian Luca Falleti
Metal additive manufacturing is a rapidly growing field based on the fabrication of complex parts with improved performance. The advantages of using this technology include the production of shapes that cannot be produced by traditional machining technol...
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Nikita A. Bylinskiy, Yuriy K. Kalynov, Valentina E. Kotomina, Nikolay Yu. Peskov, Mikhail D. Proyavin, Andrei V. Savilov, Dmitry D. Sobolev, Alexander A. Vikharev and Vladislav Yu. Zaslavsky
A novel concept of a frequency-tuned sub-terahertz gyrotron based on a combination of an irregular low-frequency resonator and an external reflector has been proposed recently. A simulation was carried out for a fundamental-cyclotron-harmonic gyrotron th...
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Chang-Wan Ha, Sungho Jung, Jinseong Park and Jaewon Lim
Magnetic levitation can reduce particulate contamination that occurs during wafer transportation in the semiconductor manufacturing process. This technology radically eliminates contact between the wafer and the transport system, reducing friction, wear,...
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Sebastian-Marian Zaharia, Mihai Alin Pop, George Razvan Buican, Lucia-Antoneta Chicos, Valentin Marian Stamate, Ionut Stelian Pascariu and Camil Lancea
Metallic additive manufacturing technology is seeing increasing use from aviation companies manufacturing prototypes or components with complex geometric shapes, which are then tested and put into operation. This paper presents the design, fabrication vi...
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Claudio Bruno, Antonella Ingenito and Domenico Simone
A human Mars mission is more challenging to astronauts than the Apollo mission because of travel time, life support requirements, and the space environment. Although plans for Mars exploration by NASA and SpaceX based on conventional rockets have been pr...
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Constantin Sandu, Andrei-George Totu, Andrei-Tudor Trifu and Marius Deaconu
This paper presents the technological advancement of using friction powders to increase the absorption of acoustic liners used in the reduction of tonal noise generated by aero-engines or for other applications related to Helmholtz resonators used in noi...
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