A5101585220- Advanced DC-DC Converters
- Advanced Battery Technologies Research
- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- Induction Heating and Inverter Technology
- Electric and Hybrid Vehicle Technologies
- GaN-based semiconductor devices and materials
- Engineering Applied Research
- Wireless Power Transfer Systems
- Embedded Systems and FPGA Design
- Analog and Mixed-Signal Circuit Design
- Electric Motor Design and Analysis
- Internet of Things and Social Network Interactions
- Ionosphere and magnetosphere dynamics
- Microgrid Control and Optimization
- Sensor Technology and Measurement Systems
- Electromagnetic Compatibility and Noise Suppression
- Photovoltaic System Optimization Techniques
- Electric Vehicles and Infrastructure
- Advanced Power Amplifier Design
- Earthquake Detection and Analysis
- Energy Harvesting in Wireless Networks
- Geological and Geochemical Analysis
- GNSS positioning and interference
- Innovative Energy Harvesting Technologies
Seoul National University
2004-2024
Kyoto University
2024
Hanyang University
2009-2018
Chinese Academy of Sciences
2017
31 Degrees (France)
2017
Xinjiang University
2017
Beijing Jiaotong University
2017
Chung-Ang University
2016
Chonnam National University
2016
Kyushu University
2016
Prognostic factors in locally advanced breast cancer treated with neoadjuvant chemotherapy differ from those of early cancer. The purpose this study was to identify the clinical significance potential predictive and prognostic patients by chemotherapy.A total 145 stage II III received docetaxel/doxorubicin were enrolled study. We examined biological (ER, PR, p53, c-erbB2, bcl-2, Ki-67) immunohistochemistry. analyzed outcome their correlation clinicopathologic parameters.Among parameters...
A nonisolated bidirectional dc-dc converter has been proposed in this brief for charging and discharging the battery bank through a single circuit applications of uninterruptible power supplies hybrid electric vehicles. The operates under zero-voltage switching condition provides large voltage diversity both modes operation. This enables to step up low-battery high dc-link voltage, vice versa. operation is achieved by employing only three active switches, coupled inductor, an additional...
Ataxia telangiectasia and Rad3‐related (ATR) proteins are sensors of DNA damage, which induces homologous recombination (HR)‐dependent repair. ATR is a master regulator damage repair (DDR), signaling to control replication, apoptosis. Therefore, the pathway might be an attractive target for developing new drugs. This study was designed investigate antitumor effects inhibitor, AZD6738 its underlying mechanism in human breast cancer cells. Growth inhibitory against cell lines were studied...
Article Natural Plant Extracts as Novel Antiviral Candidates: Citrus extracts Mijeong Choi 1,†, Jihyeong Hwang 2,†, Kwango Han 1, Hyunjik Noh Byeongju Kang Taehwa Jeong Gyumin Haekyoung Lee Yuri Kim Hanbong Ryu Sinae 2, Heejun 3, and Saerok Shim 2,* 1 Biomedical Engineering Research Institute, 32 Dongguk-ro, Goyang-si 10326, Republic of Korea 2 The Institute YbdY Biotechnology, 83, Gasan digital 1-ro, Geumcheon-gu, Seoul 08589, 3 Kulf, 7, Sareung-ro 70 beon-gil, Namyangju-si, Gyeonggi-do...
This paper presents three pulsewidth modulation modulators using CMOS operational transconductance amplifiers. They consist of a ramp integrator and current-tunable Schmitt triggers. Prototype circuits built discrete components exhibited that their duty cycles are linearly controllable. Because simple structure, the proposed can be easily fabricated in monolithic integrated circuit.
Abstract On September 12, 2016, a M L 5.8 earthquake hit Gyeongju in the southeastern part of Korean Peninsula (SeKP), although area is known to be far from boundary active plate. A number strike-slip faults are observed heavily populated city areas (e.g., Busan, Ulsan, Pohang, and Gyeongju). However, dissolved gases related have rarely been studied despite many groundwater wells hot springs area. Here we report new results gas compositions isotope values helium carbon dioxide (CO 2 )...
The 27‐day solar modulation of the low‐latitude ionosphere is investigated for maximum period using in situ satellite measurement data and total electron contents (TEC) estimated from signals global positioning system (GPS). Whereas density temperature topside observed at an altitude 685 km manifest delayed responses to variations daily F10.7 values, similar those previously reported 840 km, nighttime‐scale height, obtained by comparing densities altitudes local times, was shown vary...
In this study, the losses due to time-harmonic current in a permanent magnet synchronous motor (PMSM) are calculated through co-analysis of time harmonics using space vector pulse width modulation (SVPWM) inverter. PMSM is typically used as control motor. The contains because inverter voltage not sinusoidal, and result, occur. These have negative effect on performance, which vulnerable heat. Therefore, for efficiency performance evaluation PMSM, it necessary consider harmonics. we present...
The single-ended (SE) resonant inverter is a type of class E parallel and popularly used in many IH applications due to its lower cost structure relatively high efficiency. However maximum power rating should be limited because the voltage SE increases as increases. Consequently up around 2kW. This paper proposes an interleaved for induction heating applications. proposed can provide two times higher output than conventional by alternative operation inverters. A burst mode control enhances...
An embedded inductor constructed with Sendust powder composite films and circuits is proposed. The consist of mixed flaked powders EPDM rubber. circuit an etched spiral copper trace 16 turns two layers. Copper patterned a dimension 0.025 mm thickness, 0.1 width, pitch. Regarding the performances proposed inductor, it was obtained that simulated inductance resistance are 4.7 uH 770 mΩ, respectively, while measured results 5.0 720 mQ, respectively. Measurements also show has relative high...
The fuzzy logic controller has been focused in the field of vector control induction motors. However, a systematic method for designing and tuning is not developed yet. In this paper, an auto-tuning based on genetic algorithm presented. proposed method, normalization parameters membership function are translated into binary bit-strings, which processed by order to be optimized well-chosen objective (i.e. fitness function). To examine validity indirect motors simulated experiment carried out....
The study described in this paper was undertaken to identify the dimming control characteristics of electrodeless fluorescent lamp. First, accomplish this, a model lamp made. Two kinds methods, variable switching frequency method and dc-link voltage method, were then applied resulting lamp, after which results application two methods on compared. hypotheses that initially formulated confirmed by experiment conducted 100-W ENDURA-type show lamp's is nonlinear linear over wide range,...
This paper presents a 75W single-stage power supply unit for LED lighting. The proposed designed using flyback converter topology that is controlled by the critical conduction mode control. secondary side of main transformer directly connected to strings. By constant current feedback circuit, this regulates current. Although circuit doesn't need input current-sensing and voltage feed-forward, it can achieve high factor wide range. A prototype experimental set-up has been built tested....
A foreign object detection has issued as a problem to be solved urgently on the wireless charging system of electric vehicles. In this paper, tech tree in view patent advanced American and Japanese companies is introduced.
An integrated inductor using the low-temperature co-fired ceramics (LTCC) technology for low-power electronics was fabricated. The has A/sub g/ circular spiral coil with 16 turns (2 /spl times/ 8 layers), a dimension of 11.52 mm in diameter, and 0.71 thickness. To establish calculation inductance, including total resistance, fabricated analyzed. It confirmed that calculated values were very close to measured values. Finally, low-profile ferrite core, parameters at mu//sub R/=2400 AL value...
A resistance deviation-to-pulsewidth converter is presented for interfacing resistive sensors. It consists of a ramp integrator, two resistance-tunable Schmitt triggers, and logic gates. prototype circuit built using discrete components exhibits resolution as high 14 bits linearity error less than plusmn0.06% when the output pulse counted by 10-MHz clock signal. The proposed applied to measure temperature difference with platinum detectors. measured conversion sensitivity...
This paper proposes a new 3-phase interleaved LLC resonant DC-DC converter and its control scheme. The proposed circuit consists of three conventional converters each operates with π/3 phase difference respectively. Therefore the current ripple output capacitor can be significantly reduced life cycle will extended. To verify validity digital scheme, an experiment prototype 1kW (12V/84A) was implemented results are presented in this paper.
We investigated the global distribution of equatorial plasma bubbles (EPBs) using in situ density measurements from Korea Multipurpose Satellite‐1 (KOMPSAT‐1) and Defense Meteorological Satellite Program (DMSP) F15 during solar maximum period June 2000 to August 2001. The results were generally consistent with those previous studies. EPBs observed at all longitudes around magnetic dip equator equinoctial seasons peak occurrence American‐Atlantic‐African regions. During solstice, occurred...
Volatiles such as helium and carbon dioxide provide insights into geological processes spanning from the Earth's deep interior to its surface. Integration with geophysical data providing enhanced vertical resolution a wider horizontal range better elucidates mantle dynamics interactions crust. Here we present geochemistry of volatiles dissolved in fluid samples fault-related springs, thermal spa waters, groundwaters across Korean Peninsula. These were examined conjunction existing...
Interlayer excitons (IXs) in the heterostructure of monolayer transition metal dichalcogenides (TMDs) are considered as a promising platform to study fundamental exciton physics and for potential applications next generation optoelectronic devices. The IXs trapped moiré twisted TMD such MoSe2/WSe2 form zero-dimensional (0D) excitons. Introducing an atomically thin insulating layer between monolayers would modulate landscape, thereby tuning 0D into 2D IXs. However, optical characteristics...
This paper mainly focuses on the development of high efficiency non-isolated bidirectional DC-DC converter with large voltage diversity. The proposed can operate soft switching using a technique zero-voltage (ZVS). Coupled-inductor and clamped circuit only three switches, operating in synchronous rectification fulfill objective control. Operation principle design procedure is discussed its feasibility confirmed experimental results obtained from prototype.