Long-range low-power wireless communications, such as LoRa, are used in many IoT and environmental monitoring applications. They typically increase the communication range to several kilometers, at the cost of reducing the bitrate to a few bits per seconds. Collisions further reduce the performance of these communications. In this paper, we propose two algorithms to decode colliding signals: on...

MIMO array can obtain much more equivalent elements by using a small number of transmitters and receivers. However, according to traditional sampling theorem, a certain number of transmitters and receivers are still needed to obtain a dense equivalent array. Since the interesting targets of ground penetrating radar (GPR) are usually sparse, this paper presents a spare MIMO array GPR imaging sch...

One of the recent inquiries in the field of hadith studies is the investigation of transferred traditions and their causes and impacts on Shi‘i hadith circles. By exploring some traditions in the hadith collection of al-Shaykh al-Saduq and comparing the textual similarities and also the chain of transmitters, this research attempts to show that traditions of Jewish origin in the Shi‘i hadith ci...

For directly linking the dynamical reference frame of satellite orbits to quasi-inertial extra-galactic radio sources, observations satellites with Very Long Baseline Interferometry (VLBI) technique are only conceivable method. Hence, should be embedded in VLBI network sessions during which also natural sources observed. this reason, it would most practical if artificial signal generated at for...

Most neurons release a single fast-acting low-molecular-weight transmitter at synapses to activate and open postsynaptic ion channels. We challenge this principle with evidence for corelease of the two major excitatory transmitters, glutamate and acetylcholine (ACh), from single identified neurons in the developing frog tadpole spinal cord. Whole-cell patch electrodes were used to record from s...

[1] The MF data recorded by the low-altitude satellite DEMETER have been used to survey the MF waves around the Earth. A global map of the MF emissions indicates that there exists a wave activity in the frequency range 2–2.5 MHz above the main powerful VLF ground-based transmitters operating in the frequency range 18–50 kHz. It is shown that this is due to the high-frequency part of whistlers i...