Q: We bought our condo five years ago and budgeted carefully. Last month, the board sent a letter saying we owe a $42,000 special assessment for structural repairs. We are retired and on a fixed ...

CDI-Software is part of the U.S. Geological Survey's Community for Data Integration (CDI) and is a Department of the Interior (DOI) wide community of practice. This community aims to empower software ...

Abstract: Hybrid beamforming (HBF) transceiver architectures based on frequency-independent phase shifters (PSs) are sensitive to phases and physical directions, resulting in limited capability to ...

Abstract: This correspondence studies the design of beam hopping (BH) pattern for satellite communication systems with hybrid analog-digital precoding. We investigate the transmit power minimization ...

Please Don't Scroll Past This Can you chip in? The Internet Archive partners with libraries, archives, and institutions across the globe to preserve cultural heritage that would otherwise be lost ...

Can you chip in? This year we’ve reached an extraordinary milestone: 1 trillion web pages preserved on the Wayback Machine. This makes us the largest public repository of internet history ever ...