Young‐Jun Park

Recent advances in the understating of tumor immunology suggest that cancer immunotherapy is an effective treatment against various types of cancer. In particular, the remarkable successes of immune checkpoint-blocking antibodies in clinical settings have encouraged researchers to focus on developing other various immunologic strategies to combat cancer. However, such immunotherapies still face difficulties in controlling malignancy in many patients due to the heterogeneity of both tumors and in

This paper presents a retention/ pulse frequency modulation (PFM)/ pulse width modulation (PWM) mode dc–dc buck converter with adaptive zero current detector (AZCD) and spread spectrum clock generation (SSCG) for IoT/Wearable systems. The proposed dc–dc buck converter is capable of handling loads from 10 μA to 20 mA with high efficiency by applying triple mode (retention mode, PFM mode, and PWM mode), gate split technique, and AZCD. Retention mode is proposed to extend wide load range at ultrali

The growing interest in bioinspired and sustainable electronics has induced research on biocompatible and biodegradable materials. However, conventional electronic devices have been restricted due to their nonbiodegradable and sometimes harmful and toxic materials, which can even cause environmental issues. Here, we report a resistive switching random access memory (ReRAM) device based on lignin, which is a biodegradable waste product of the paper industry. The active layer of the device can be

Resistive switching memory that uses halide perovskites (HP) has been considered as next-generation storage devices due to low operation voltage and high on/off ratio. However, the memory still faces challenges for stable operation with fast switching speed, which hinders the practical application. Thus, it should be considered from the stage of designing the HP for memory applications. Here, we design the perovskite memory using a high-throughput screening based on first-principles calculations

High-performance optoelectronic synaptic transistors are reported with a long-term memory by using organic–inorganic halide perovskites and oxide semiconductors.

This paper presents the design of a triple-mode wireless power-receiving unit (TWPRU) for battery charger with high efficiency. The TWPRU is proposed based on Alliance for Wireless Power (A4WP), Wireless Power Consortium (WPC), and Power Matters Alliance (PMA) standards. An adaptive alignment gate controller technique is proposed in the triple-mode active rectifier to block the reverse leakage current and improve the power conversion efficiency (PCE). This technique can compensate for the delays

Abstract Flexible threshold switch devices are essential for low‐power and high‐speed semiconductor devices. Especially, bidirectional threshold switch has been regarded as the ideal switching device for ultrahigh‐density crosspoint memory devices. Here, a flexible Pt/Ag‐doped ZnO/Pt switch on the flexible plastic substrate synthesized by electrochemical bottom‐up deposition is introduced. The flexible switch has bidirectional threshold switching behavior with ultralow off‐current, high selectiv

In the design of wind turbine gearboxes, the most important objective is to improve the durability to guarantee a service life of more than 20 years. This work investigates how external loads caused by wind fluctuation influence both the load distribution over the gear tooth flank and the planet load sharing. A whole system model is developed to analyze a wind turbine gearbox (WTG) that consists of planetary gearsets. Two models for different design loads are employed to quantify how external lo