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Lateral–torsional buckling resistance of cellular beams
Journal of Constructional Steel Research, 2015The evenly spaced circular web openings in I-section cellular beams have an advantageous effect on the material use if these beams are loaded in strong-axis bending. However, not all aspects of the behaviour of such beams have been studied adequately, such as the lateral–torsional buckling failure.
Sonck, Delphine, Belis, Jan
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Advances in composite beams with web openings and composite cellular beams
Journal of Constructional Steel Research, 2020Abstract In the last two decades, civil construction has used steel elements to compose the structural framework. The use of composite elements of steel and concrete in multi-storey buildings has been gaining market share in several countries, mainly due to the possibility of reducing the height of the building, the structure's own weight and the ...
Felipe Piana Vendramell Ferreira +2 more
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Ion Beam Etching of Cellular Material
Proceedings, annual meeting, Electron Microscopy Society of America, 1974The ion beam etching of cellular material was studied by examining uncoated cells during the course of etching in the specimen chamber of a scanning electron microscope. Repeated examination of the cells during etching faciliated the interpretation of features in the etched surface.Cells were initially fixed in glutaraldehyde prior to being dispersed ...
M. Spector, L. C. Burns, S. L. Kimzey
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Multi beam antennas for cellular networks
2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, 2012Multi-Beam antenna arrays, made by H-plane waveguides with 4, 8 and 12 elements are proposed for cellular base stations. Simulated and experimental results show the beam directions, the gains, the side lobes and the overlapping between close elements, within the requirements for such products (very low loss, high power capability and flexibility in ...
Roni Marino, Haim Matzner, Ely Levine
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FEMTOSECOND CELLULAR TRANSFECTION USING A NON DIFFRACTING LIGHT BEAM
Biomedical Optics, 2007The ability to permeate selectively the cell membrane and introduce therapeutic agents is a key goal in cell biology. Optical transfection is a powerful methodology but requires exact focusing due to the required two-photon power density. The authors use a Bessel beam that obviates the need to locate precisely the cell membrane, permitting two-photon ...
X. Tsampoula +7 more
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An antenna for switch beam, multi-beam millimetre-wave cellular systems
2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), 2016This paper presents the design and implementation of a compact, two-dimensional antenna with broadband performance capable of increasing system capacity for next generation 5G base stations. This simple low profile, parallel plate Lune burg lens can be exploited to ensure high energy efficiency, higher data rates, spectral efficiency, and extended ...
David Lee, Jafar Shaker, Yahia Antar
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3D Beam Tracking for Cellular-Connected UAV
IEEE Wireless Communications Letters, 2020Three-dimensional (3D) beamforming is an effective technique for performance enhancement in cellular-connected unmanned aerial vehicle (UAV) communications. Specifically, ground base stations (GBSs) equipped with full-dimensional (FD) antenna arrays are able to perform fine-tuned 3D transmit/receive beamforming with enhanced interference mitigation for
Yi Huang +4 more
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Fast beam discovery for mmWave cellular networks
2017 IEEE 18th Wireless and Microwave Technology Conference (WAMICON), 2017Pencil beamforming is used to compensate for channel impairments in millimeter wave cellular networks. This method requires testing of all beam combinations at the base and mobile stations in order to detect the unique beam pair with the optimum signal level for use in the control and data planes. However exhaustive search results in high computational
Mohammed Jasim, Nasir Ghani
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