Decentralized Platoon Join-in-Middle Protocol Considering Communication Delay for Connected and Automated Vehicle.

Cooperative driving is an essential component of intelligent transport systems (ITSs). It promises greater safety, reduced accidents, efficient traffic flow, and fuel consumption reduction. Vehicle platooning is a representative service model for ITS.

Extremely Low-Profile Monopolar Microstrip Antenna with Wide Bandwidth.

In this paper, we propose a new monopolar microstrip antenna for a high-speed moving swarm sensor network. The proposed antenna shows an extremely thin substrate thickness supported with an omni-directional radiation pattern and wide operation frequency bandwidth. First, to achieve the low-profile monopolar microstrip antenna, the symmetrical center feeding network and the gap-coupled six arrayed patches which form a hexagonal microstrip radiator were utilized.

Design of a Cooperative Lane Change Protocol for a Connected and Automated Vehicle Based on an Estimation of the Communication Delay.

Connected and automated vehicles (CAVs) have recently attracted a great deal of attention. Various studies have been conducted to improve vehicle and traffic safety through vehicle to vehicle (V2V) communication. In the field of CAVs, lane change research is considered a very challenging subject.

Influence of Surface Charges/Chemistry on the Catalysis of Perovskite Complexes.

The electrochemical performance of the perovskite complex was discovered to depend greatly on the different locations of the identical particle, which represent different surface charges accordingly. The surface charges were evaluated by Zeta potential (ζ) for the intrinsic BSCF5582 (BaSrCoFeO), ball-milled (BM-BSCF5582), and heat-treated in an oxygen atmosphere after ball-milling (48h-O-BM-BSCF5582), the mean ζ of which represents -11.1, 21.

Progressive Assessment on the Decomposition Reaction of Na Superionic Conducting Ceramics.

The successful analysis on the microstructure of Hong-type Na superionic conducting (NASICON) ceramics revealed that it consists of several heterogeneous phases: NASICON grains with rectangular shapes, monoclinic round ZrO particles, grain boundaries, a SiO-rich vitrified phase, Na-rich amorphous particles, and pores. A dramatic microstructural evolution of NASICON ceramics was demonstrated via an in situ analysis, which showed that NASICON grains sequentially lost their original morphology and were transformed into comminuted particles (as indicated by the immersion of bulk NASICON samples into seawater at a temperature of 80 °C). The consecutive X-ray diffraction analysis represented that the significant shear stress inside NASICON ceramics caused their structural decomposition, during which HO ions occupied ceramic Na sites (predominantly along the (1̅11) and (1̅33) planes), while the original Na cations came out in the (020) plane of the NASICON ceramic crystalline structure.

Fabrication of Ba0.5Sr0.5Co0.8Fe0.2O(3-δ) catalysts with enhanced electrochemical performance by removing an inherent heterogeneous surface film layer.

A heat-treatment approach for Ba0.5Sr0.5Co0.

A bifunctional perovskite catalyst for oxygen reduction and evolution.

La0.3(Ba0.5Sr0.

Practice patterns of Korean urologists for screening and managing prostate cancer according to PSA level.

Purpose: There are still debates on the benefit of mass screening for prostate cancer (PCA) by prostate specific antigen (PSA) testing, and on systemized surveillance protocols according to PSA level. Furthermore, there is a paucity of literature on current practice patterns according to PSA level in the Korean urologic field. Here, we report the results of a nationwide, multicenter, retrospective chart-review study.

Photo-EMF sensitivity of porous silicon thin layer-crystalline silicon heterojunction to ammonia adsorption.

A new method of using photo-electromotive force in detecting gas and controlling sensitivity is proposed. Photo-electromotive force on the heterojunction between porous silicon thin layer and crystalline silicon wafer depends on the concentration of ammonia in the measurement chamber. A porous silicon thin layer was formed by electrochemical etching on p-type silicon wafer.

The effect of antiviral therapy on serum cholesterol levels in chronic hepatitis C.

Background/aims: The aims of this study were to evaluate the effect of antiviral therapy on serum total cholesterol (TC) levels and to investigate the factors related to serum TC changes in chronic hepatitis C (CHC) patients.

Methods: A total of 94 CHC patients, the majority of whom were infected with genotype 1 or 2 and were receiving antiviral therapy, were consecutively enrolled. TC levels before treatment, at week 4, at the end of treatment (EOT), and at 24 weeks after the EOT were analyzed, along with factors related to pre- and post-treatment TC levels.