A5023482624- Semiconductor materials and devices
- Dental Implant Techniques and Outcomes
- Diverse Approaches in Healthcare and Education Studies
- Mesoporous Materials and Catalysis
- Analog and Mixed-Signal Circuit Design
- Dementia and Cognitive Impairment Research
- Advancements in Semiconductor Devices and Circuit Design
- Catalysis and Oxidation Reactions
- Catalytic Processes in Materials Science
- Advancements in PLL and VCO Technologies
- Energy Harvesting in Wireless Networks
- Dental Radiography and Imaging
- Alzheimer's disease research and treatments
- Temporomandibular Joint Disorders
- Wireless Power Transfer Systems
- Health and Wellbeing Research
- Periodontal Regeneration and Treatments
- Advanced Memory and Neural Computing
- Botulinum Toxin and Related Neurological Disorders
- Industrial Gas Emission Control
- Radio Frequency Integrated Circuit Design
- Bone Tissue Engineering Materials
- Psychosocial Factors Impacting Youth
- Silicon Carbide Semiconductor Technologies
- Diverse Topics in Contemporary Research
Seoul National University Bundang Hospital
2016-2025
Korea Advanced Institute of Science and Technology
2023-2024
Sungkyunkwan University
2013-2024
Korea Institute of Toxicology
2022-2024
Chungnam National University
2018-2024
Samsung (South Korea)
2007-2020
Seoul National University
2009-2020
New Generation University College
2020
Korea Research Institute of Chemical Technology
2014-2015
Konkuk University Medical Center
2013
In this paper, a high efficiency dc-dc buck converter with two-step digital pulse width modulation (DPWM) and low power self-tracking zero current detector (ST-ZCD) is proposed for Internet of Things (IoT) ultralow applications. The hybrid DPWM core linearity consumption to implement the converter. It composed delay control using counter line. An adaptive window analog reduce output voltage ripple within 20 mV. A dead time generator implemented ST-ZCD minimize reverse current. can improve by...
We aimed to evaluate the efficacy of demineralized dentin matrix (DDM) fixed with recombinant human bone morphogenetic protein-2 (rhBMP-2) through an experimental and a clinical study. Unilateral upper second third premolars eight beagles were extracted. A mucoperiosteal flap was elevated around extraction socket, defect made using surgical drill. Each DDM rhBMP-2, autogenous grafted at area collagenous membrane. The euthanized two, four, eight, 12 weeks after receiving graft. Block...
Abstract INTRODUCTION This study aimed to explore the association between plasma amyloid‐β oligomerization tendency (OAβ) and cognitive performance in Alzheimer's disease (AD) determine its predictive value for outcomes of mild impairment (MCI). METHODS Plasma from 727 subjects (286 AD, 260 MCI, 181 controls) a case registry was analyzed using multimer detection system (MDS) measure OAβ. RESULTS Elevated OAβ strongly correlated with multidomain patients MCI AD. Patients high baseline...
This paper presents a reconfigurable wide input power range radio frequency (RF) energy harvester (EH) with alliance for wireless (A4WP) receiver (WPR). A RF-DC converter RF EH and maximum point tracking algorithm are proposed to maintain high efficiency over -20 +20 dBm. The A4WP WPR is designed merged the receive higher than In order improve conversion (PCE), delay between ac voltage current compensated by open-loop compensation method. chip implemented in 0.18 μm...
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 Wireless Power (A4WP), Consortium (WPC), and Matters (PMA) standards. An adaptive alignment gate controller technique in active rectifier to block reverse leakage current improve power conversion efficiency (PCE). can compensate delays control signals main switching mosfets at different operating frequencies A4WP, WPC, PMA....
Embedding conductive nanomaterials into elastomeric polymer matrices is one of the most promising approaches for fabricating stretchable strain sensors capable monitoring large mechanical movements or deformation through detection resistance changes. Here, hybrid fillers comprising graphene and silver nanowires (AgNWs) are incorporated extremely spandex to fabricate sensors. Composites containing only those graphene/AgNW systematically investigated by evaluating their electrical properties....
Hot-carrier effects in n-channel bulk FinFETs were investigated for the first time. For V/sub DS/ larger than about 1.4 V, stress bias condition of GS/=V/sub showed shorter lifetime that DS//2 condition. The hot-carrier-induced degradation was checked by changing fin body width, and increased with decreasing width. Bulk (100) side surface orientation less g/sub mmax/ device [110] surface. supply voltage which meets 10 years at 1.2 V.
본 연구에서는 오이를 첨가한 막걸리의 특성을 알아보기 위하여 쌀의 20%만큼 첨가하여 막걸리를 제조한 후 이화학적 및 미생물학적 평가하였다. 발효 6일째 알코올 함량은 대조군 16.3%, 오이 막걸리 16.2%로 유의적인 차이가 없었으며, 두 시료의 pH도 나타나지 않았다. 총산은 시료 모두 1일째에 급격히 증가하고, 그 이후 완만히 증가하였다. 총 균수, 유산균수 효모수 막걸리가 대조군보다 높았으며, 색도는 대조군과 사이에 큰 유리당 중 glucose는 발효가 진행되면서 감소하였고, succinic acid 함량이 가장 높았다. 휘발성 화합물중 막걸리에서 많이 동정된 성분은 3-methyl-1-butanol, 2-methyl-1-propanol, ethyl acetate이었다.
Progesterone (P4) is a crucial reproductive hormone that acts as precursor for all other endogenous steroids. P4 modulates transcriptional activity during reproduction by binding to progesterone receptors (PR). However, the physiological role of in liver understudied. P4-mediated lipid metabolism was investigated this study, facilitates insulin resistance and influences energy metabolism. While exogenous lipids are mainly obtained from food, synthesizes triglycerides cholesterol carbohydrate...
This study aims to enhance breast cancer detection accuracy through an AI-driven ultrasound tool, Vis-BUS, developed by Barreleye Inc., Seoul, South Korea. Vis-BUS incorporates Lesion Detection AI (LD-AI) and Analysis (LA-AI), along with a Cancer Probability Score (CPS), differentiate between benign malignant lesions. A retrospective analysis was conducted on 258 examinations evaluate Vis-BUS's performance. The primary methods included the application of LD-AI LA-AI b-mode images generation...
Abstract The reaction rate of Knoevenagel condensation can be dramatically enhanced by irradiating the mixture containing ethyl cyanoacetate, an aldehyde, P2O5, piperidine, and chlorobenzene with a commercial microwave oven. A number products were prepared in good yields very short times (2-15min) under irradiation.
In this paper, a low-power reconfigurable ambient Radio Frequency to Direct Current power (RF–DC) converter using an internal threshold voltage cancellation (IVC) scheme with auxiliary transistors block is presented. A maximum point tracking (MPPT) algorithm implemented in order maintain the high efficiency by automatically selecting number of stages. The proposed efficiently converts RF signals DC dynamically controlling forward and reversed-biased primary rectification body. During...
Energy efficiency in mobile devices is a pivotal criteria from the overall system point of view, Although 7,5Gb/s 8Gb LPDDR5 [1], with low-power schemes (internal data copy, dynamic-voltage-frequency scaling (DVFS), and deep-sleep mode (DSM)), achieves improved energy compared to previous LPDDR4X [2], market demands for higher density speed gradually increase high-end applications including hand-held artificial intelligence (AI) advanced driver assistance (ADAS), To achieve power-efficient...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The temperature <formula formulatype="inline"><tex>$(T)$</tex></formula> dependence of formulatype="inline"><tex>$I_{\rm SUB}$</tex></formula> and formulatype="inline"><tex>$I_{D}$</tex> </formula> in bulk FinFETs was investigated for the first time. Both n- p-channel devices with thin fin body width showed abnormal increase at high formulatype="inline"><tex>$T$</tex></formula>, which can be...
This research evaluated clinical outcomes of two types hydroxyapatite (HA)-coated implants: OT (Osstem TS III-HA, Osstem implant Co., Busan, Korea) and ZM (Zimmer TSV-HA, Zimmer dental, Carlsbad, USA).MATERIALS AND METHODS.The was conducted on 303 implants (89 OT, 214 ZM), which were placed from January 16, 2010 to December 20, 2012.The prognosis in terms success rates, survival annual marginal bone loss, stability quotients (ISQ).The samples classified into immediate, early, conventional,...
Socket sealing surgery is performed for the preservation of form and volume soft tissue by covering resulting socket with autogenous graft or membrane barriers. This procedure usually necessary to improve esthetic results maxillary anterior premolar areas.This study retrospectively investigated cases involving open technique a palatal gingival collagen where implant placement bone grafting were immediately after tooth extraction. From January 2005 December 2008, was in 24 patients, 25...
High-speed and low-power techniques for the latest mobile DRAMs, such as LPDDR4/4X [1–3], have been developed to enable high-resolution displays, multiple cameras 4G communication in devices. However, DRAM with higher bandwidth lower power consumption than LPDDR4X is indispensable support 5G communication, on-device artificial intelligence advanced driver assistance systems. In this paper, we present a 1 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...