DUAL-POLARIZATION AND DUAL-BAND CONICAL-BEAM ARRAY ANTENNA BASED ON DUAL-MODE CROSS-SLOTTED CYLINDRICAL WAVEGUIDE

Dual-Polarization and Dual-Band Conical-Beam Array Antenna Based on Dual-Mode Cross-Slotted Cylindrical Waveguide

Two designs of conical-beam array antennas are presented for different fifth-generation applications.They are based on slotted cylindrical waveguides and a travelling-wave topology, where the waveguide is used to progressively excite a cross-slot array.A total of 384 cross-slots, formed by transversal and longitudinal slots, are grouped in rings of

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Posttransplant Intramuscular Injection of PLX-R18 Mesenchymal-Like Adherent Stromal Cells Improves Human Hematopoietic Engraftment in A Murine Transplant Model

Late-term complications of hematopoietic cell transplantation (HCT) are numerous and include incomplete engraftment.One possible mechanism of incomplete engraftment after HCT is cytokine-mediated suppression or dysfunction of the bone marrow microenvironment.Mesenchymal stromal cells (MSCs) elaborate cytokines that nurture or stimulate the marrow m

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Institutional quality and the wealth of autocrats

One frequently given explanation for why autocrats maintain corrupt and inefficient institutions is that the autocrats benefit personally even though the citizens of their countries are worse off.The empirical evidence does not support this hypothesis.Autocrats in countries with low-quality institutions do tend to be wealthy, but typically, they we

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