A New Achievable Scheme for Interference Relay Channels

We establish an achievable rate region for discrete memoryless interference relay channels that consist of two source-destination pairs and one or more relays. We develop an achievable scheme combining Han-Kobayashi and noisy network coding schemes. We apply our achievability to two cases. First, we characterize the capacity region of a class of discrete memoryless interference relay channels. This class naturally generalizes the injective deterministic discrete memoryless interference channel by El Gamal and Costa and the deterministic discrete memoryless relay channel with orthogonal receiver components by Kim. Moreover, for the Gaussian interference relay channel with orthogonal receiver components, we show that our scheme achieves a better sum rate than that of noisy network coding.Comment: 18 pages, 4 figure

Sensing-Based Power Adaptation for Cellular V2X Mode 4

Recently, the 3rd Generation Partnership Project (3GPP) has introduced cellular vehicular-to-everything (C-V2X) standards to support vehicle-to-everything (V2X) communications. In C-V2X, radio resources can be managed either through a central network control or decentralized manner (Mode 4). In Mode 4, each vehicle selects its own resources to transmit V2X messages without any cellular network support. Focusing on Mode 4, we study and discuss the impact of transmission power under varying density of vehicles through simulations. Based on the discussion results, we proposes an adaptive power control algorithm. In our proposed algorithm, each vehicle takes real-time channel sensing information as an input for its transmit power control. Finally, we show that the proposed algorithm outperforms the conventional scheme.N

Observation of Fano line shape in directional fluorescence emission mediated by coupled planar waveguide modes and interpretation based on Lorentz reciprocity

Using a reverse attenuated-total-reflection geometry, we measured angle-scan fluorescence emission spectra of all-dielectric multilayer samples containing a waveguide layer doped with fluorescent dye molecules (fluorescent waveguide layer). A sample containing only one fluorescent waveguide layer showed a highly directional emission spectrum with a Lorentzian line shape caused by the radiative decay of an excited planar waveguide mode into a traveling wave in a decoupling prism. Addition of another waveguide layer containing absorptive dye molecules was found to greatly modify the spectrum and generate a Fano line shape in the emission spectrum. The observed Lorentzian and Fano emission spectra could be well reproduced by electromagnetic calculations based on the Lorentz reciprocity theorem. Calculated results of electric field distributions indicate that the Fano line shape is generated by the suppression of local electric fields inside the fluorescent waveguide layer resulting from coupling between two waveguide modes

High-resolution acoustophoretic 3D cell patterning to construct functional collateral cylindroids for ischemia therapy

The fabrication of functional tissues is essential for clinical applications such as disease treatment and drug discovery. Recent studies have revealed that the mechanical environments of tissues, determined by geometric cell patterns, material composition, or mechanical properties, play critical roles in ensuring proper tissue function. Here, we propose an acoustophoretic technique using surface acoustic waves to fabricate therapeutic vascular tissue containing a three-dimensional collateral distribution of vessels. Co-aligned human umbilical vein endothelial cells and human adipose stem cells that are arranged in a biodegradable catechol-conjugated hyaluronic acid hydrogel exhibit enhanced cell-cell contacts, gene expression, and secretion of angiogenic and anti-inflammatory paracrine factors. The therapeutic effects of the fabricated vessel constructs are demonstrated in experiments using an ischemia mouse model by exhibiting the remarkable recovery of damaged tissue. Our study can be referenced to fabricate various types of artificial tissues that mimic the original functions as well as structures. ? 2018, The Author(s

Performance Evaluation of Channel Bonding in Dense Scenario

IEEE 802.11ac standard has extended channel bonding to improve network throughput. However, in an increasingly dense network environment, 802.11ac has not achieved desired performance. To solve the problem, the latest standard 802.11ax which aims to improve the average user performance has been proposed. In addition, TGax presents a scenario that reflects the dense network environment. In this paper, we analyze the performance of using channel bonding in dense scenario through ns-3 simulations. We also find how use of RTS/CTS affects spatial reuse in the scenario.N

Configurable Energy-Efficient Lattice-Based Post-Quantum Cryptography Processor for IoT Devices

This work presents a configurable lattice-based post-quantum cryptography processor suitable for lightweight edge devices. To reduce hardware cost and energy consumption, it employs a look-up-Table-based modular multiplication for the number-Theoretic transform and a real-Time processing for polynomial sampling. Implementation in 28nm CMOS shows 15.4x and 14.5x reductions of gate count and on-chip memory size, respectively, compared to the previous state-of-The-Art implementation at the cost of only 54% in energy.1