A5100330712- Nanomaterials and Printing Technologies
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advanced Sensor and Energy Harvesting Materials
- Thin-Film Transistor Technologies
- Innovation in Digital Healthcare Systems
- Advanced Memory and Neural Computing
- Ferroelectric and Negative Capacitance Devices
- Semiconductor materials and devices
- Nanofabrication and Lithography Techniques
- Microfluidic and Bio-sensing Technologies
- Conducting polymers and applications
- 3D IC and TSV technologies
- Additive Manufacturing and 3D Printing Technologies
- Numerical methods in engineering
- Electromagnetic Simulation and Numerical Methods
- Copper Interconnects and Reliability
- Internet of Things and Social Network Interactions
- Electrowetting and Microfluidic Technologies
- Welding Techniques and Residual Stresses
- Smart Cities and Technologies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Combustion and flame dynamics
- Subcritical and Supercritical Water Processes
- Engineering Applied Research
Kyung Hee University Hospital at Gangdong
2025
Korea Advanced Institute of Science and Technology
2022-2024
Daegu Health College
2023
Korea Institute of Industrial Technology
2012-2023
Hanbat National University
2008-2022
Jeonbuk National University
2017
Chungbuk National University
2014
Mokwon University
2014
Software (Germany)
2014
Baekseok University
2014
AbstractAbstractThe fast growing ubiquitous infrastructure technologies are capable of improving current urban management and planning development capabilities. These technological advancement developments in the Republic Korea have recently shifted from an old paradigm conventional to a new intelligent provision. This paradigm, so called infrastructure, is combination infrastructures, information communication digital networks. Ubiquitous refers system where any citizen can access services...
This article presents a 3D ferroelectric NAND flash memory with wide MW, low operation voltage, fast PGM/ERS speed, and higher endurable cycles based on HfZrO film that shows excellent ferroelectricity even at relatively thick thickness.
Berberine has therapeutic potential in central nervous system disorders, however, few studies have investigated the effect of berberine on axonal regeneration PNS injury models. Thus, this study aims to assess effects a peroneal nerve transection rat model. Sprague-Dawley rats were divided into two groups: group B, (20 mg/kg) intraperitoneal injection after transection; and C, normal saline as control. The sciatic functional index (SNFI) was used recovery at 2, 4, 6 weeks post-transection....
The shape changes of inkjet-printed dots and lines were investigated by varying the primary solvent nanosilver colloids, surface wettability substrate temperature. morphological in array patterns due to interaction between neighboring or during evaporation was also examined for two different colloids. In order examine effect rate, solvents with boiling points (BP) employed inks. With a fluorocarbon film coating subsequent ultraviolet ozone (UV/O3) treatment, various conditions obtained on...
Ferroelectric field-effect transistors (FeFETs) have attracted enormous attention for low-power and high-density nonvolatile memory devices in processing-in-memory (PIM). However, their small window (MW) limited endurance severely degrade the area efficiency reliability of PIM devices. Herein, we overcome such challenges using key approaches covering from material to device array architecture. High ferroelectricity was successfully demonstrated considering thermodynamics kinetics, even a...
Abstract Flash memory is a promising candidate for use in in‐memory computing (IMC) owing to its multistate operations, high on/off ratio, non‐volatility, and the maturity of device technologies. However, operation voltage, slow speed, string array structure severely degrade energy efficiency IMC. To address these challenges, novel negative capacitance‐flash (NC‐flash) memory‐based IMC architecture proposed. stabilize utilize capacitance (NC) effect, HfO 2 ‐based reversible single‐domain...
We demonstrated fabrication of self-defined short channel using inkjet printing and micromolding in capillary (MIMIC) methods. Self-defined source/drain electrodes were successfully formed when silver ink drops printed on a silicon dioxide/p+ heavily doped substrate having prepatterned narrow high-aspect-ratio hydrophobic teflon separator made by MIMIC. fabricated well-defined region pentacene organic thin film transistors (OTFTs) with 5 10 <formula formulatype="inline"...
In this paper, we have investigated the characteristics of polymer inkjet printing and fabricated OLED (organic light emitting diode) display using technology. To control wetting condition droplet to substrate, UV/ozone treatment technique is used. make repeated pixels on a precise vision alignment multi-layer With successive PEDOT/PSS as hole injection layer MEH-PPV layer, successfully an demonstrated basic working OLED.
We proposed a micro electrode fabrication method by metal inkjet printing technology for the bio-applications of dielectrophoresis (DEP). The electrodes are composed bottom planar gold (Au) and three dimensional (3D) silver (Ag) fabricated locally on Au through printing. observed negative DEP characteristics 4 μm polystyrene beads both at 500 kHz, AC 20 Vpp point. number trapped printed Ag is 79 25 because spatially larger electric field in 3D system.
Laser sintering of inkjet-printed silver nanoparicles was studied. Conducting lines were printed on glass and PET substrates various thicknesses by a drop-n-demand (DOD) inkjet printer nanoparticle ink. Selective the nanopartilces then performed using laser beam to enhance electrical conductivity. Focused irradiated normally layer transparent with intensity irradiation time. Conductivity morphology sintered patterns measured compared results oven-heated sintering. Temperature elevation also...
This paper reports the particle image velocimetry (PIV) measurement of swirling flow in a confined rectangular-shaped model combustion chamber. Water is used as working fluid, and average profiles axial, radial, magnitudes velocity are given. Flow behavior investigated rebound angle term defined to investigate direct effects noncircular chamber shape. near walls discussed detail, other important features such appearance corner central toroidal recirculation zones. Additionally, experimental...
In this paper, nano-silver ink-jet printed transmission lines were fabricated to investigate RF performance on both flame retardant (FR-4) and polyimide (PI) as rigid flexible substrates. The by using the printer with velocity of 3.5 mm/s sintered in a convection oven 250 °C. was simulated measured at low frequencies. loss is be 0.22 dB@1 GHz 0.32 GHz, respectively, for FR-4 PI substrates, respectively. return has over 16 dB substrate 12 substrate. line investigated discussed regard an...
We provide a methodology for designing thermally stable hafnia ferroelectric (FE) materials to be taken into account while fabricating 3D memory devices. reveal the underlying origins thermal instability of FE in terms kinetics and material science. Furthermore, we suggest adopting dopants whose ionic radius is smaller than Hf matrix as feasible option demonstrate material. Using this approach, robust ferroelectricity achieved even at subsequent budget (TB) 750 °C 30 min. The improved...
수평축 조류발전 시스템에 사용되는 쉬라우드의 기하학적 형상각도별 해수의 유동장 특성을 전산유체역학을 통해 분석하였다. 쉬라우드를 포함한 전체 내 유속 분포는 일정한 조류속도조건에서 형상에 따라 크게 영향을 받으며 특히 발전성능에 직접적으로 미치는 쉬라우드 최대유속의 위치 및 크기는 형상 별로 큰 차이가 있다. 실린더와 디퓨저부분의 길이가 같은 실린더-디퓨저 형태의 쉬라우드에서는 실린더 영역에서 비교적 높은 유속분포가 형성되었으며 노즐과 대칭구조의 노즐-디퓨저에서는 내경이 최소인 지점에서 국부적으로 나타났다. 쉬라우드에서 조류속도에 비해 유속이 중심축상의 유속은 노즐-디퓨저와는 다르게 입구 근처에서 점차 증가하기 시작하여 실린더부분의 중앙 부근에서 피크값을 지나 디퓨저에서 급격히 감소한 후 다시 속도로 유지되어 가는 나타내었다. 이러한 형상과 해수유동장 변화특성에 대한 분석결과는 효율적인 조류발전시스템을 위한 최적설계에 응용될 수 있을 것으로 기대된다. Numerical...
Now a days, U-healthcare comes into the spotlight as new business model which combines RFID technology with medical service in well-being era and IT popularization. needs method that can deals hand-writing, overlap data, forgery falsification of difference between information version happen process because graft u-healthcare. This paper proposes based user certification protocol to protect user's privacy who gets through U-healthcare. In protocol, secret patient does XOR key is created...