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2D MoS2 has gained attention for the post‐silicon material owing to its atomically thin nature and dangling bond‐free surface. The bi‐layer MoS2 is considered a promising material for electronic devices due to its better electrical properties than monolayer MoS2. However, the uniform growth of bi‐layer MoS2 is still challenging. Herein, the uniform growth of bi‐layer MoS2 is demonstrated using gas‐phase...
Advances in large‐area and high‐quality 2D transition metal dichalcogenides (TMDCs) growth are essential for semiconductor applications. Here, the gas‐phase alkali metal‐assisted metal‐organic chemical vapor deposition (GAA‐MOCVD) of 2D TMDCs is reported. It is determined that sodium propionate (SP) is an ideal gas‐phase alkali‐metal additive for nucleation control in the MOCVD of 2D TMDCs. The grain...
This paper presents a three-dimensional path tracking strategy for a hydraulic excavator. It mainly aims to design the controller for allowing the excavator to follow typical working motions of a skillful operator such as leveling and truck loading. The performance of the designed controller is verified through real-time experiments using a 21-ton class excavator in which displacement sensors, electro-proportional...
Base station density in modern cellular networks is continuously increasing in order to cope with the exponential increase in mobile data traffic. Cellular networks which used to rely on macro cells for both system coverage and data transfer are now turning to small cells at an increasing rate. Small cells can complement macro cell dominant cellular networks by providing a cost effective means for...
In the downlink of 3GPP LTE system, primary synchronization signal (PSS) and secondary synchronization signal (SSS) sequences are used for initial cell search and synchronization. The user equipment (UE) detects slot timing, frequency offset, and cell ID by PSS in the time domain. After Fast Fourier Transform (FFT), it detects frame timing, cell group ID, and cyclic prefix (CP) length by using SSS...
In terrestrial wireless communications, high data-rate transmission can be readily achieved by installing base stations on the ground. However, the same system may not be adapted to maritime communication due to the geographically restricted nature of the sea, and therefore, MF/HF modems, capable of long-distance transmission, with low data-rate are frequently employed in maritime communication. Maritime...
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