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4. Erratum to “An Integrated Circularly Polarized Transmitter Active Phased-Array Antenna for Emerging Ka-Band Satellite Mobile Terminals” [Aug 19 5344-5352]

Author

Al-Saedi, Hussam, primary, Abdel-Wahab, Wael M., additional, Raeis-Zadeh, S. Mohsen, additional, Alian, Ehsan Haj Mirza, additional, Palizban, Ardeshir, additional, Ehsandar, Ahmad, additional, Ghafarian, Naimeh, additional, Chen, Guoyan, additional, Boroujeni, Soroush Rasti, additional, Nezhad-Ahmadi, Mohammad-Reza, additional, and Safavi-Naeini, Safieddin, additional

Published
2019
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5. An Integrated Circularly Polarized Transmitter Active Phased-Array Antenna for Emerging Ka-Band Satellite Mobile Terminals

Author

Al-Saedi, Hussam, primary, Abdel-Wahab, Wael M., additional, Raeis-Zadeh, S. Mohsen, additional, Alian, Ehsan Haj Mirza, additional, Palizban, Ardeshir, additional, Ehsandar, Ahmad, additional, Ghafarian, Naimeh, additional, Chen, Guoyan, additional, Rasti Boroujeni, Soroush, additional, Nezhad-Ahmadi, Mohammad-Reza, additional, and Safavi-Naeini, Safieddin, additional

Published
2019
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7. Supplementary text and figures from Inferring cellular forces from image stacks

Author

Veldhuis, Jim H., Ehsandar, Ahmad, Jean-Léon Maître, Hiiragi, Takashi, Cox, Simon, and G. Wayne Brodland

Abstract

Although the importance of cellular forces to a wide range of embryogenesis and disease processes is widely recognized, measuring these forces is challenging, especially in three dimension. Here, we introduce CellFIT-3D, a force inference technique that allows tension maps for three-dimensional cellular systems to be estimated from image stacks. Like its predecessors, video force microscopy and CellFIT, this cell mechanics technique assumes boundary-specific tensions to be the primary drivers, and it constructs force-balance equations based on triple-junction dihedral angles. The technique involves image processing, segmenting of cells, grouping of cell outlines, calculation of dihedral planes, averaging along three-dimensional triple junctions (TJs), and matrix equation assembly and solution. The equations tend to be strongly overdetermined, allowing indistinct TJs to be ignored and solution error estimates to be determined. Application to clean and noisy synthetic data generated using Surface Evolver gave tension errors of 1.6–7%, and analyses of eight-cell murine embryos gave estimated errors smaller than 10%, the uncertainty of companion aspiration experiments. Other possible areas of application include morphogenesis, cancer metastasis and tissue engineering.This article is part of the themed issue ‘Systems morphodynamics: understanding the development of tissue hardware’.

Published
2017
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