A5084868865- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Sensor and Energy Harvesting Materials
- Low-power high-performance VLSI design
- Tactile and Sensory Interactions
- Advanced Wireless Communication Techniques
- Advanced Wireless Network Optimization
- Wireless Communication Networks Research
- Advanced Battery Technologies Research
- Biosensors and Analytical Detection
- Analytical Chemistry and Sensors
- Advancements in Battery Materials
- Ferroelectric and Negative Capacitance Devices
- Microfluidic and Bio-sensing Technologies
- Modular Robots and Swarm Intelligence
- Telecommunications and Broadcasting Technologies
- Advanced Battery Materials and Technologies
- Transportation and Mobility Innovations
- Enzyme Catalysis and Immobilization
- Enzyme Production and Characterization
- Urban and Freight Transport Logistics
- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Microbial Metabolic Engineering and Bioproduction
- Non-Invasive Vital Sign Monitoring
Korea Military Academy
2022-2025
Sogang University
2009-2024
University of Illinois Urbana-Champaign
2019-2022
Northwestern University
2020
Samsung (South Korea)
2002-2016
Abstract Individuals who are unable to walk independently spend most of the day in a wheelchair. This population is at high risk for developing pressure injuries caused by sitting. However, early diagnosis and prevention these still remain challenging. Herein, we introduce battery-free, wireless, multimodal sensors movable system continuous measurement pressure, temperature, hydration skin interfaces. The device design includes crack-activated sensor with nanoscale encapsulations enhanced...
Soft microfluidic systems that capture, store, and perform biomarker analysis of microliter volumes sweat, in situ, as it emerges from the surface skin, represent an emerging class wearable technology with powerful capabilities complement those traditional biophysical sensing devices. Recent work establishes applications real-time characterization sweat dynamics chemistry context sports performance healthcare diagnostics. This paper presents a collection advances biochemical sensors designs...
With the explosive growth of battery-operated portable devices, demand for low power and small size has been increasing system-on-a-chip (SoC). The FinFET is considered as one most promising technologies future low-power mobile applications because its good scaling ability, high on-current, better SCE subthreshold slope, leakage current [1]. As a key approach low-power, supply-voltage (V<inf>DD</inf>) widely used in SoC design. However, SRAM limiting factor voltage-scaling, since all...
Abstract Continuous monitoring of vital signs is an essential aspect operations in neonatal and pediatric intensive care units (NICUs PICUs), particular importance to extremely premature and/or critically ill patients. Current approaches require multiple sensors taped the skin connected via hard‐wired interfaces external data acquisition electronics. The adhesives can cause iatrogenic injuries fragile, underdeveloped skin, wires complicate even most routine tasks patient care. Here,...
Two 128 Mb dual-power-supply SRAM chips are fabricated in a 14 nm FinFET technology. A 0.064 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\mu$</tex> </formula> m Notation="TeX">$^{2}$</tex> and 0.080 6T bitcells designed for high-density (HD) high-performance (HP) applications. To improve Notation="TeX">${\rm V}_{{\rm MIN}}$</tex></formula> of the SRAM, negative bitline scheme (NBL) is adopted as...
Recent advancements in wearable sweat sensors, which use standardized electrochemical and colorimetric mechanisms, offer holistic representation of health status for users. However, the constraints sensors present ongoing challenges to realization personalized management. This study presents an electrocolorimetric (EC) platform that enables reversible multiple-time data visualization using electrophoretic display (EPD). represents application low-power EPD epidermal sensor, evaluated through...
The power consumption of a mobile application processor (AP) is strongly limited by the SRAM minimum operating voltage, VMIN [1], since 6T bit cell must balance between write-ability and stability. However, scales down gradually with advanced process nodes due to increased variability. This evident quantized device-width process-knobs FinFET technology, which has greatly affected design [2–4]. Therefore, assist-circuits are more crucial in technology improve VMIN, turn adds Power,...
Abstract Billions of internet connected devices used for medicine, wearables, and robotics require microbattery power sources, but the conflicting scaling laws between electronics energy storage have led to inadequate sources that severely limit performance these physically small devices. Reported here is a new design paradigm primary microbatteries drastically improves density by eliminating vast majority packaging through use high‐energy‐density anode cathode materials. These light (50–80...
Abstract Small‐reactor‐based polymerase chain reaction (PCR) has attracted considerable attention. A significant number of tiny reactors must be prepared in parallel to capture, amplify, and accurately quantify few target genes clinically relevant large volume, which, however, requires sophisticated microfabrication longer sample‐to‐answer time. Here, single plasmonic cavity membrane is reported that not only enriches captures nucleic acids by taking advantage both capillarity hydrodynamic...
The Zadoff-Chu sequence-based random access preamble adopted in LTE system supports the convenient detection of ID and propagation delay due to superb correlation properties, conventional algorithm is simple well-performing by using these properties. However performance strictly limited presence large delay. This paper gives enhanced scheme order overcome limitation Simulation results indicate that proposed able estimate exact information with 18.5% complexity increment. implemented C64x...
Accessing high voltages (>9 V) and power density in microbatteries with volumes below ∼0.25 cm3 is challenging. At such scales, energy voltage are highly constrained by packaging serial integration of cells. Here, we demonstrate hermetically sealed, durable, compact (volume ≤ 0.165 cm3) batteries low package mass fraction (10.2%) single- (∼4 V), double- (∼8 triple-stacked (∼12 configurations densities reaching 990 Wh Kg−1 1,929 L−1 (triple-stacked battery discharged at C/10) for continuous...
The HARQ enables the error correction of unsuccessfully decoded transport block, but it requires redundancy retransmissions and delay in receiving an acknowledgement. In order to provide flexibility scheduling, DL LTE system uses asynchronous so that occur at any time. Generally FDD, round trip time (RTT) which is interval between initial transmission retransmission fixed. TDD, UL/DL subframe separated domain by UL-DL configuration, RTT different according each would be longer than FDD....
Ethanol production using glycerol as a carbon source was performed by Enterobacter aerogenes immobilized on calcium alginate beads. To improve the ethanol production, optimal conditions such loading amount of cells and concentration were investigated. The 10 mL bead g/L, respectively. Consequently, consumption rate, yield 0.32 g/<TEX>$L{\cdot}h$</TEX>, 3.38 g/L 0.43 g/g batch Continuous successfully achieved two types cell reactors (continuous stirred tank reactor packed bed reactor) from...
Abstract Xylose‐rich undefined broth, extracted from the dilute acid pretreatment wastes of barley straw, serves as resourceful media for Acremonium chrysogenum M35 culture and production cephalosporin C (CPC). Concentrating extract with proper reprocessing enables to prepare various concentrations xylose broth (2%–8%). The were prepared CPC A. by addition other nutrients. Cell growth most effective at 6% additional 2% glycerol, maximum 9.07 g/L after 6 days, which is higher than that in...
This paper proposes a new multicode interference cancellation algorithm which uses frequency responses of the channelization codes used in HSDPA system. The proposed estimates components at chip rate, and then it improves detection performance e by removing estimated interferences from received signal. computer simulation shows that receiver adapting decreases receiving power 6.0 dB to achieve 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
We have developed a 1.29 um2 full CMOS SRAM cell for low power applications, which is the world-smallest one by using 0.12 um single gate technology and optical enhancement techniques extending use of 248 nm KrF lithography. It includes (1) 0.28 pitch contacts formed aerial image controlled patterns on phase shift mask (PSM) photo resist flow, (2) with 0.24 pitch, (3) 0.13 buried channel pMOS, (4) spacer-on-stopper (SOS) MOSFET structure expanding contact area reducing band-to-band tunneling leakage.
The smallest SRAM cell, 0.79 /spl mu/m/sup 2/, was realized by a revolutionary cell layout, fine tuned OPC technique to overcome the 248 nm KrF lithography limitation, instead of using 193 ArF lithography. Sub-100 CMOS technology indispensable achieve size as well performance. high performance transistors were made with 80 gate length including 15 Aring/ nitrided oxide layer, indium channel and halo implantation processes. novel exhibits excellent neutron SER immunity, compared ones previous...
Microbatteries The proliferation and performance of physically small electronics have been severely limited by the microbatteries that power them. In article number 2101760, John B. Cook, Paul V. Braun, James H. Pikul, co-workers report a new design paradigm for primary drastically improves energy density through use thick near-fully dense electrodeposited cathodes multifunctional current collectors eliminate most hermetic packaging.