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A comparative TCAD (Technology Computer Aided Design) simulation study of various 4H-SiC trench gate MOSFET (Metal Oxide Semiconductor Field Effect Transistor) (or U-shaped trench gate MOSFET abbreviated for UMOSFET) architectures for high voltage and high-speed switching applications is reported. The DC (Direct Current) and AC (Alternating Current) characteristics of the different trench gate structures are investigated. Particularly, compared to conventional 4H-SiC UMOSFETs, the breakdown voltage of the UMOSFET having a p-type implanted bottom shield is increased by 44%. However, due to the extra JFET (Junction Field Effect Transistor) region, the specific on resistance also increases by 6%. Furthermore, under 1000 V drain bias, the peak electric field at the bottom oxide of the shielded trench gate is below 0.3 MV/cm. In contrast, the peak electric field of conventional UMOSFETs can be as high as 8 MV/cm, which might cause reliability issues. On the other hand, when the bottom oxide thickness of the trench gate is increased, the UMOSFET exhibits 22% less total gate charge, leading to 76% and 71% shorter switching delay time, compared to conventional UMOSFETs and bottom shield UMOSFETs, respectively. As revealed by the simulation results, the UMOSFETs with the p-type implanted bottom shield or thick bottom oxide are advantageous for high voltage and high-speed power switching applications.

This paper presents the design of a V-band logarithmic power detector (PD) and the integration with a 60-GHz CMOS vital-signs Doppler radar sensor to be incorporated with a microprocessor control unit (MCU) for fast automatic clutter cancellation. The PD adopts the successive detection logarithmic amplifier (SDLA) topology and achieves a high dynamic range by replacing the limited amplifiers with millimeter-wave (MMW) linear amplifiers. From the measurement results, the PD exhibits a dynamic range and logarithmic errors higher than 35 dB and within ±2 dB from 50 to 62 GHz. The whole integrated radar sensor chip is fabricated by a 90-nm CMOS process with a chip size of 2 mm $\times2.34$ mm and a dc power consuming of 243 mW. The radar chip and a 60-GHz 17-dBi patch-array antenna are integrated by bondwire interconnection on a compact single carrier board for experimental test. By incorporating the MCU to the radar chip board, the fast automatic clutter canceling can achieve more than 25-dB clutter cancellation. Moreover, it shows a successful vital-signs detection for a distance more than 1.2 m.

Mixed-reality digital interactive performance is a new style of performance art that facilitates impromptu interactions among dancers and virtual characters in real time. However, such performance is difficult to conduct as the performance designer has to deal with the asynchronous events and temporal requirements of interactions among performers, virtual characters, and music, which are tedious and error-prone. This paper presents the design and implementation of a domain-specific language called DIPS (Digital Interactive Performance Sketch) that aims to help directors of such performance test their ideas quickly. On the surface, DIPS provides the common domain abstractions and their associated operations for performance with simple rule syntax that simplifies the task of designers to a large degree. Behind the scenes, DIPS is realized through a combination of a number of established language embedding techniques on the Scala language and some middle-level facility based on the Scala Akka library. To evaluate DIPS, we have implemented a language workbench and an execution engine together with an application called the Future Circus. The preliminary evaluation results are encouraging and demonstrate the feasibility and effectiveness of DIPS.

Mixed-reality performer-guided performance is a new style of performance art that facilitates impromptu interactions among dancers and virtual characters in realtime using wearable technologies. In this paper, we present the design of a full-stack wearable integration platform, called WISE (Wearable Item Service runtimE), that supports such performance art behind the scene. WISE deals core issues such as connectivity, manageability, context-awareness, and simplicity of the performance art. The experiment results show that the platform is stable and is able to drive the performance smoothly. Finally, we demonstrate the feasibility of WISE platform by conducting a live interactive public performance called Future Circus supported by the proposed platform.