A5100359570- Semiconductor materials and devices
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Fiber Optic Sensors
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Data Storage Technologies
- Advanced Battery Technologies Research
- Integrated Circuits and Semiconductor Failure Analysis
- Photonic and Optical Devices
- Microwave Engineering and Waveguides
- Cellular Automata and Applications
- Ferroelectric and Negative Capacitance Devices
- Copper Interconnects and Reliability
- Antenna Design and Analysis
- Magneto-Optical Properties and Applications
- Millimeter-Wave Propagation and Modeling
- Laser Material Processing Techniques
- Advanced battery technologies research
- 3D IC and TSV technologies
- Gaze Tracking and Assistive Technology
- ZnO doping and properties
- Advancements in PLL and VCO Technologies
- Low-power high-performance VLSI design
- Robotic Path Planning Algorithms
- Robotics and Sensor-Based Localization
Seoul National University
2009-2024
Seoul Media Institute of Technology
2009-2024
Samsung (South Korea)
2012-2023
Government of the Republic of Korea
2020
Jeonbuk National University
2007-2018
Seoul National University Hospital
2012
Yeungnam University
2011
Pusan National University
2011
Korea Research Institute of Bioscience and Biotechnology
2011
Samsung Advanced Institute of Technology (South Korea)
2007
A 64-word-line-stacked 512-Gb 3-b/cell 3-D NAND flash memory is presented. After briefly examining the challenges that occur to a stack, several technologies are suggested resolve issues. For performance enhancement, novel program method hiding two-page data loading time This paper also discusses an electrical annealing improving reliability characteristic by removing holes in shallow traps. In addition, valley tracking read for reducing timing overhead at retry introduced fast finding...
Since the first demonstration of a production quality three-dimensional (3D) stacked-word-line NAND Flash memory [1], 3b/cell 3D has seen areal density increases more than 50% per year due to aggressive development 3D-wordline-stacking technology. This trend been consistent for last three consecutive years [2-4], however storage market still requires higher diverse digital applications. A 4b/cell technology is one promising solution increase bit [5]. In this paper, we propose with 12MB/s...
The advent of emerging technologies such as cloud computing, big data, the internet things and mobile computing is producing a tremendous amount data. In era storage devices with versatile characteristics are required for ultra-fast processing, higher capacity storage, lower cost, power operation. SSDs employing 3D NAND promising to meet these requirements. Since introduction technology marketplace in 2014 [1], memory array size has nearly doubled every year [2,3]. To continue scaling...
Musical abilities such as recognising music and singing performance serve means for communication are instruments in sexual selection. Specific regions of the brain have been found to be activated by musical stimuli, but these rarely extended discovery genes molecules associated with ability.A total 1008 individuals from 73 families were enrolled a pitch-production accuracy test was applied determine ability. To identify genetic loci variants that contribute ability, we conducted...
Data storage is one of the hottest discussion topics in today's connected world. The amount data growth expected to be exponential, while budget and space remain constricted. Since transformation device from planar NAND 3D V-NAND [1], areal density semiconductor devices has continuously evolved surpassed magnetic hard drives. By providing largest capacity smallest footprint, been leading center revolution recent years. However, 3D-technology scaling faces several technical challenges [2]....
4 Gb/s/pin 32 bit 512 Mb GDDR4 (Graphics Double Data Rate 4) SDRAM was implemented by using an 80 nm CMOS process. It employs a data bus inversion (DBI) coding to overcome the bottleneck of parallel single-ended signaling, power consumption I/O, supply noise, and crosstalk. Both DBI AC DC modes are combined single circuit eliminating feedback path conventional while achieving high-speed operation. The proposed uses analog majority voter insensitive mismatch for small area delay. R <sub...
MicroRNAs (miRNAs) are a class of small, single-stranded, noncoding RNAs ranging from 19 to 25 nucleotides. The miRNA control various cellular functions by negatively regulating gene expression at the post-transcriptional level. regulation over their target genes has central role in plant growth and development; however, only few reports have been published on function miRNAs family Solanaceae. We identified Solanaceae analyzing expressed sequence tag (EST) data five different species. A...
A fiber-optic cure monitoring system is proposed to measure curing status of composite structure such as a large scale wind turbine blade. The based on the measurement Fresnel reflectivity at optical fiber/epoxy resin interface. refractive index epoxy varies throughout stages, changing reflectivity. decided by reflected intensity variation. usage fiber Bragg grating (FBG) sensor helps separate temperature-induced cross effects. Gaussian curve fitting algorithm was applied FBG spectra which...
In this paper, fundamental reliability findings in 14nm bulk FinFET technology, are systematically investigated. From device and Ring Oscillator stress to product-level HTOL results, we show that BTI on (110) Fin can be improved significantly with optimized process. addition, variability small Fins does not pose any risk we'll 1000hrs of data 128Mb SRAM. Self-heating effect (SHE) was characterized for both logic I/O devices verified through simulations thermal imaging product design...
In this study, we demonstrated the intercalation of Na in hydrothermally synthesized VOx nanotubes (NTs) and Ni-doped NTs. The changes induced structures two nanomaterials during process were investigated through X-ray diffraction (XRD) analyses. It was observed that initial capacity rate performance NTs improved. results photoelectron spectroscopy (XPS) conductance measurement confirmed higher attributed to an increase valence states vanadium increased conductivity after Ni exchange process.
The increasing demands for emerging high-energy-density applications, such as electric vehicles, have prompted considerable efforts to design a new type of innovative, sustainable battery. Li–O 2 batteries can deliver much higher energy densities than current Li-ion and thus attracted attention; however, their poor cyclic stability remains major obstacle use in applications. carbon-based cathode materials (CCMs) used are considered one the origins this cycle-life degradation, which has led...
A stable electrolyte is required for use in the open-packing environment of a Li-O2 battery system. Herein, gelled quasi-solid-state containing SiO2 nanoparticles was designed, order to obtain solidified with high discharge capacity and long cyclability. We successfully fabricated an organic–inorganic hybrid matrix structure, which exhibited ionic conductivity, thereby enhancing battery. In particular, improved electrochemical stability cathode led long-term The structure played beneficial...
Li-O2 batteries have attracted considerable attention for several decades due to their high theoretical energy density (>3400 Wh/kg). However, it has not been clearly demonstrated that actual volumetric and gravimetric densities are higher than those of Li-ion batteries. In previous studies, a quantity electrolyte was usually employed in preparing cells. general, the considerably heavier carbon materials cathode, rendering practical battery lower battery. Therefore, air cathodes with...
This letter presents transmission enhancement methods for low-emissivity (low-E) windows at millimeter wavelength (mmWave) frequencies. These are required installation of effective indoor customer premises equipment mmWave fixed wireless access (FWA) services. Low-pass filtering frequency selective surfaces patterned with low-E coatings by laser, and the effects verified theoretically experimentally. Antireflection (AR) dielectrics additionally utilized found to reduce loss in various types...
Older adults have muscle loss and are at risk of falling. Recently, research in the healthcare field has been actively conducted, Samsung Electronics developed EX1, a hip joint assisted robot for exercise. This study aimed to verify effect 4-week combined exercise program applying EX1 on older adults.This design was an evaluator-blinded, pre- post-test. A total 21 performed consisting walking fitness wearing 50 min per session, 3 days week during period. For comparison before after...
The TDDB failure mechanism of high-k dielectric/metal gate (HK/MG) CMOSFETs on DC and AC stress conditions are investigated in comparison to poly-Si/SiON. All devices under unipolar exhibit longer time (t <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">bd</sub> ) as frequency increases. In case HK/MG, the SILC behavior has been attributed bulk transient charge trapping by pre-existing defects HK. Since trapped charges HK can easily be detrapped...
In this study, we successfully synthesized lamellar-structured Ni0.1VOx NTs by a microwave-assisted hydrothermal method and cation exchange reaction. High initial discharge capacity 100% efficiency were obtained when the cathode was used as material for Na battery. The intercalation mechanism fading effect investigated in detail both experimentally using Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) photoelectron (XPS)...
3,5-Bis(trifluoromethyl)phenylmaleimide functionalized CNT buckypapers are prepared as a binder-free oxygen electrode for Li–O<sub>2</sub> batteries with increased capacity and enhanced stability.
Current research on robot navigation is focused clear recognition of the map and optimal path planning. The human cleaning is, however, not regarding time but to purpose. We have analyzed in this paper behaviors home environments understood user's planning through usage tests various vacuuming robots. discovered that actual user cleans with methods unique specific areas house rather than following an path. only suggest a method for by using layered map, also area designating reflecting each...
We report a fiber-optic sensor based on Fresnel reflection for real-time monitoring of cryogenic temperatures. Coating highly thermo-sensitive polymers the facet optical fiber, we obtain average measurement sensitivity 0.04 dB/K in temperature range 90-298 K. show theoretical background polymer's thermo-optic response and experimental results performed with two kinds coating polymers, epoxy resin, polymethyl methacrylate. The confirm suitability sensing applications, such as superconducting...
NAND Flash-based solid-state drives (SSDs) have been adopted in enterprise storage applications that require high capacity and high-throughput performance. In recent years, a SATA interface supporting only up to 600MB/S throughput has hindered the accelerating performance growth of SSDs due host bandwidth limit. A PCI Express (PCIe) emerged close limit because it can deliver 1GB/s per lane be scaled multi-lane improve [1]. Accordingly, SSD bottleneck moved from flash interface. memory...
Keggin-type polyoxometalates (POMs), which possess multiple redox centers, were investigated as bidirectional mediators in rechargeable batteries. A series of POMs have been synthesized and employed sulfur electrodes where neither the active material nor discharge product electrically conductive. found to potentials covering range equilibrium reactions sulfur, consequently facilitated both charge reactions. In particular, [SiMo12O40]4− offered a large capacity 1270 mAh g−1 by accelerating...