Publications by authors named "Kosuke Nishimura"
Wideband signal generation using frequency/phase modulation (FM/PM) is the key fundamental function for various applications such as radar and analog communication systems. It is well known that analog FM/PM communication systems can dramatically improve signal quality by spectral expansion. In classical communication theories, the Armstrong indirect method is one of the most popular methods for bandwidth expansion of FM signals.
View Article and Find Full Text PDFAn IF-over-fiber (IFoF)-based analog transport technology for mobile fronthaul applications has recently attracted significant attention. However, most previous studies have employed discrete optical components. For the analog transport technology to be a more cost-effective and power-efficient solution, it is necessary to utilize existing integrated optical transceivers.
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- The study explores how micro-sized particles behave in liquid suspensions, contrasting their hydrodynamic effects with the thermal effects that dominate for nano-sized particles, leading to different mixing behaviors.
- Experiments on the gravitational settling of these micro-sized particles reveal that the concentration interface between different layers of suspension affects particle mixing, especially when dealing with varying particle densities.
- Results show that a sufficient number of particles can create an immiscible interface that inhibits mixing, while fewer particles can lead to a miscible state, highlighting the complex dynamics at play in these suspensions.