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RF Sensor-based Liveness Detection Scheme with Loop Stability Compensation Circuit for a Capacitive Fingerprint System

Woojung Kim, Woojin Hong, Taekmoo Kim, Dongwoon Kim, Myunghee Lee
2019 IEEE Access  
ACKNOWLEDGMENT The authors would like to thank the following members of Canvasbio for their contribution: Junyun Kim for sensor module assembly, Juncheol Ok, Dongho Kim and Dongmin Kim for IC design consultation  ... 
doi:10.1109/access.2019.2947609 fatcat:c5ylnvw67fdy7g7wv4csrazvfq

LTE-advanced modem design: challenges and perspectives

Dongwoon Bai, Cheolhee Park, Jungwon Lee, Hoang Nguyen, Jaspreet Singh, Ankit Gupta, Zhouyue Pi, Taeyoon Kim, Chaiman Lim, Min-Goo Kim, Inyup Kang
2012 IEEE Communications Magazine  
TAEYOON KIM ( has been a senior systems engineer with Samsung Electronics since October 2009, where he works on the system design of modem chipsets and 3GPP standardization work  ...  MIN-GOO KIM ( joined Samsung Electronics in 1993 and is currently the head of groups in the area of mobile systems and RF technologies.  ... 
doi:10.1109/mcom.2012.6146497 fatcat:5o62hmtnkzderpq67tb2hqzz4a

Reconstruction of a composite comparative map composed of ten legume genomes

Chaeyoung Lee, Dongwoon Yu, Hong-Kyu Choi, Ryan W. Kim
2016 Genes & Genomics  
Kim ) . In addition to grain legumes for human food, legume crops serve for a diverse array of utilities, such as forage for animal feed, oilseed, medicine and agroforestry (Singh et al. 2007 ).  ...  bioinformatic platform, called 'CSGM (cross-species genic marker) Designer ( CSGMdesigner)', was developed with an aim to facilitate high throughput design of the crossspecies markers (Kim  ... 
doi:10.1007/s13258-016-0481-8 pmid:28090266 pmcid:PMC5196017 fatcat:znqh5ph7nnfuxnoit54pindmty

Host Immunosuppression Induced by Steinernema feltiae, an Entomopathogenic Nematode, through Inhibition of Eicosanoid Biosynthesis

Miltan Chandra Roy, Dongwoon Lee, Yonggyun Kim
2019 Insects  
Cho and Kim [45] have reported that Xenorhabdus and Photorhabdus are cytotoxic to insect hemocytes via apoptosis.  ...  Jung and Kim [43] have measured the speed-to-kill of X. nematophila (Proteobacteria: Enterobacterales) is 16 h against P. xylostella larvae. Our current LT50s ranged from 46 to 50 h post-infection.  ... 
doi:10.3390/insects11010033 pmid:31906089 pmcid:PMC7023448 fatcat:zgql2rph2fe6tmmudb2idyqy7y

Estimating the Benefits of Korea's Intercity Rail Speed Increase Project: An Agent-Based Model Approach

Chansung Kim, Heesub Rim, DongIk Oh, Dongwoon Kang
2022 Modelling  
[2] ), and autonomous minibuses (Kim et al. [3] ), which play an important first-mile and last-mile role in urban transportation.  ...  In this context, several specialized methods to improve accessibility have been introduced, such as autonomous cars, the slow transportation mode (Kim et al. [1] , Standen et al.  ... 
doi:10.3390/modelling3010007 fatcat:li7mkyh3yzasjn755z4kaxapki

Design and Control of a Open-Source, Low Cost, 3D Printed Dynamic Quadruped Robot

Joonyoung Kim, Taewoong Kang, Dongwoon Song, Seung-Joon Yi
2021 Applied Sciences  
In this paper, we present a new open source dynamic quadruped robot, PADWQ (pronounced pa-dook), which features 12 torque controlled quasi direct drive joints with high control bandwidth, as well as onboard depth sensor and GPU-equipped computer that allows for a highly dynamic locomotion over uncertain terrains. In contrast to other dynamic quadruped robots based on custom actuator and machined metal structural parts, the PADWQ is entirely built from off the shelf components and standard 3D
more » ... nted plastic structural parts, which allows for a rapid distribution and duplication without the need for advanced machining process. To make sure that the plastic structural parts can withstand the stress of dynamic locomotion, we performed finite element analysis (FEA) on leg structural parts as well as a continuous walking test using the physical robot, both of which the robot has passed successfully. We hope this work to help a wide range of researchers and engineers that need an affordable, highly capable and easily customizable quadruped robot.
doi:10.3390/app11093762 doaj:d7169e734c1a40b2ba9b7ddd6509894e fatcat:dw4uziffjnbyjom256czm7oi7y

Superiorized Photo-Acoustic Non-NEgative Reconstruction (SPANNER) for Clinical Photoacoustic Imaging

Idan Steinberg, Jeesu Kim, Martin K. Schneider, Dongwoon Hyun, Aimen Zlitni, Sarah M. Hooper, Tal Klap, Geoffrey A. Sonn, Jeremy J. Dahl, Chulhong Kim, Sanjiv Sam Gambhir
2021 IEEE Transactions on Medical Imaging  
Photoacoustic (PA) imaging can revolutionize medical ultrasound by augmenting it with molecular information. However, clinical translation of PA imaging remains a challenge due to the limited viewing angles and imaging depth. Described here is a new robust algorithm called Superiorized Photo-Acoustic Non-NEgative Reconstruction (SPANNER), designed to reconstruct PA images in real-time and to address the artifacts associated with limited viewing angles and imaging depth. The method utilizes
more » ... se forward modeling of the PA propagation and reception of signals while accounting for the effects of acoustic absorption, element size, shape, and sensitivity, as well as the transducer's impulse response and directivity pattern. A fast superiorized conjugate gradient algorithm is used for inversion. SPANNER is compared to three reconstruction algorithms: delay-and-sum (DAS), universal back-projection (UBP), and model-based reconstruction (MBR). All four algorithms are applied to both simulations and experimental data acquired from tissue-mimicking phantoms, ex vivo tissue samples, and in vivo imaging of the prostates in patients. Simulations and phantom experiments highlight the ability of SPANNER to improve contrast to background ratio by up to 20 dB compared to all other algorithms, as well as a 3-fold increase in axial resolution compared to DAS and UBP. Applying SPANNER on contrast-enhanced PA images acquired from prostate cancer patients yielded a statistically significant difference before and after contrast agent administration, while the other three image reconstruction methods did not, thus highlighting SPANNER's performance in differentiating intrinsic from extrinsic PA signals and its ability to quantify PA signals from the contrast agent more accurately.
doi:10.1109/tmi.2021.3068181 pmid:33755561 fatcat:uh6url3jajf5fpyksk477m3ikq

Stabilization of Target Tracking with 3-axis Motion Compensation for Camera System on Flying Vehicle

Yanjie Sun, Dongwoon Jeon, Doo-Hyun Kim
2014 IEMEK Journal of Embedded Systems and Applications  
Dongwoon Jeon 2005: B.E. degree in internet & multimedia engineering from  ...  Kim, "Real time object tracking based on ] L. Li, W. Huang, I. Gu, Q. Tian, "Foreground ACM international conference on Multimedia, pp.2-10, 2003.[6] G.L. Foresti,C.  ... 
doi:10.14372/iemek.2014.9.1.43 fatcat:n22va6j5zrbafeq5yhzqm6s4zy

Photocatalytic and Antipathogenic Effects of TiO2/CuxO (1<x<2)
TiO2/CuxO (1<x<2)의 광촉매 활성 및 항균작용

Sungwoo Cho, Yong-Im Lee, Lee-Han Kim, Dongwoon Jung
2013 Journal of the Korean Chemical Society  
요 약. CuCl2로부터 용액합성법에 의해 CuO를 제조하였다. CuCl2를 용액에 첨가하기 전에 용액내에 anatase형 TiO2 입자를 분산시켜 CuO가 형성되는 과정에서 TiO2/CuO 결합입자를 합성하였다. 얻어진 TiO2/CuO에 적당량의 글루코스를 가하여 반 응시켜 CuO의 일부를 Cu2O로 환원시켰다. 얻어진 시료 TiO2/CuxO (1<x<2) 복합체의 광특성, 광촉매 활성 및 항균작용에 대 하여 실험하였다. 얻어진 TiO2/CuxO 복합체는 anatase와는 다르게 가시광선 전 영역에서 흡광이 발생했으며 당연한 결과로 태 양광선에서 TiO2/CuxO 복합체의 광촉매 활성은 anatase TiO2에 비하여 매우 뛰어난 것으로 나타났다. 또한 TiO2/CuxO 복합체 의 항균성이 대단히 뛰어난 것으로 나타났다. 주제어: Cu2O, 복합체, 광촉매, 항균성, 용액합성법 ABSTRACT. Copper oxide (CuO) was synthesized from CuCl2
more » ... solution method. Anatase TiO2 particle was dispersed into the solution before preparing CuO, so that TiO2/CuO heterojunction was created through the nucleation of CuO onto the TiO2 surface. Some amount of CuO was reduced to Cu2O by treating glucose into the solution, thereby preparing TiO2/CuxO complex. The obtained TiO2/CuxO complex showed advanced phtocatalytic activity under the sun light compared with the P-25 sample. In addition, the the TiO2/CuxO complex showed excellent antipathogenic effect.
doi:10.5012/jkcs.2013.57.4.483 fatcat:7llfydaqvfgpbepjaha52wuujm

An implementation of reliable data sharing multi-stack system in virtualized environment
신뢰성 있는 멀티스택 기반의 가상화된 데이터 동시공유 시스템의 구현

Kyujong Han, Dongwoon Jeon, Doohyun Kim
2016 IEMEK Journal of Embedded Systems and Applications  
In this paper, we present an architecture for the fault isolation by applying virtualization-based multi-stack technologies. We propose the simultaneous sharing and switching mechanism using virtualied serial communications. Each guest OS has its own virtual serial device. The distribution module provides communications between the guest OS's through the virtual serial devices and simultaneously detect the liveness of the guest OS. The suggested mechanism has been implemented in VirtualBox and
more » ... hows satisfactory performance in transmission speed and data sharing capability with virtual RS232.
doi:10.14372/iemek.2016.11.5.259 fatcat:xykdxoecm5f67kpmwuiirevfaq

Bone regeneration with umbilical cord blood mesenchymal stem cells in femoral defects of ovariectomized rats

Boohwi Hong, Sunyeul Lee, Nara Shin, Youngkwon Ko, DongWoon Kim, Jun Lee, Wonhyung Lee
2018 Osteoporosis and Sarcopenia  
Current treatments for osteoporosis were prevention of progression, yet it has been questionable in the stimulation of bone growth. The mesenchymal stem cells (MSCs) treatment for osteoporosis aims to induce differentiation of bone progenitor cells into bone-forming osteoblasts. We investigate whether human umbilical cord blood (hUCB)-MSCs transplantation may induce bone regeneration for osteoporotic rat model induced by ovariectomy. The ovariectomized (OVX) group (n = 10) and OVX-MSCs group (n
more » ... = 10) underwent bilateral ovariectomy to induce osteoporosis, while the Sham group (n = 10) underwent sham operation at aged 12 weeks. After a femoral defect was made at 9 months, Sham group and OVX group were injected with Hartmann solution, while the OVX-MSCs group was injected with Hartmann solution containing 1 × 107 hUCB-MSCs. The volume of regenerated bone was evaluated using micro-computed tomography at 4 and 8 weeks postoperation. At 4- and 8-week postoperation, the OVX group (5.0% ± 1.5%; 6.1% ± 0.7%) had a significantly lower regenerated bone volume than the Sham group (8.6% ± 1.3%; 12.0% ± 1.8%, P < 0.01), respectively. However, there was no significant difference between the OVX-MSCs and Sham groups. The OVX-MSCs group resulted in about 53% and 65% significantly higher new bone formation than the OVX group (7.7% ± 1.9%; 10.0% ± 2.9%, P < 0.05). hUCB-MSCs in bone defects may enhance bone regeneration in osteoporotic rat model similar to nonosteoporotic bone regeneration. hUCB-MSCs may be a promising alternative stem cell therapy for osteoporosis.
doi:10.1016/j.afos.2018.08.003 pmid:30775550 pmcid:PMC6362973 fatcat:gjzmdcvq2rhrzaenkh4inu4yfa

Risk Factors of No-Reflow Phenomenon after Primary Percutaneous Coronary Intervention with Stent Implantation

Jin Shik Park, Jang Whan Bae, Bon Kwon Koo, Tae Jin Yeon, Hyo Soo Kim, Dae Won Sohn, Byung Hee Oh, Young Bae Park, Yun Shik Choi, In Ho Chae, Dong Joo Choi, Donghoon Choi (+7 others)
2004 Korean Circulation Journal  
and Objectives:No-reflow is an important phenomenon for limiting the prognosis of patients following primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI). Coronary stenting is the current standard procedure for primary PCI in AMI. However, stenting is suspected to cause more microembolization, and no-reflow phenomenon. This study was performed to elucidate the risk factors for the no-reflow phenomenon following primary PCI with stenting, in patients with AMI.
more » ... bjects and Methods:The clinical, angiographic and procedure related parameters were reviewed in patients with AMI that had undergone primary PCI, with stent implantation, within 12 h of the onset of chest pain, at Seoul (n=183). Results:29 patients (16%) showed no-reflow phenomenon (final TIMI flow grade less than 3). Conventional risk factors for coronary artery disease were not significant risk factors for the no-reflow phenomenon. In a univariate analysis, a high initial CK-MB level (>50 IU) (8.45% vs. 21.9%, p=0.04), low left ventricular ejection fraction (LV EF) (<50%) (19% vs. 5%, p=0.03) and long pre-dilatation balloon inflation time (>30 sec) (31% vs. 15%, p=0.04) were significant risk factors of the no-reflow phenomenon. A low LV EF and long pre-dilatation balloon inflation time were significant risk factors in a multivariate analysis. Conclusion:LV dysfunction at presentation and a long pre-dilatation balloon inflation time were independent risk factors for the no-reflow phenomenon following primary PCI with stenting for AMI. Preventive measures against the no-reflow phenomenon should be considered in patients with these risk factors. (Korean Circulation J 2004;34(4):368-375) KEY WORDS:No-reflow phenomenon;Infarction, myocardial;Stent, transluminal, percutaneous coronary.
doi:10.4070/kcj.2004.34.4.368 fatcat:tqfe4zl43nfythoryywoicfalq

Change in the Pathologic Supraspinatus: A Three-Dimensional Model of Fiber Bundle Architecture within Anterior and Posterior Regions

Soo Y. Kim, Rohit Sachdeva, Zi Li, Dongwoon Lee, Benjamin W. C. Rosser
2015 BioMed Research International  
The posterior region of the supraspinatus was present in all normal specimens examined by Kim et al. [16] and Roh et al. [14] .  ...  Following this, the division between the anterior and posterior regions on the superficial surface of the muscle as defined by Kim et al.  ... 
doi:10.1155/2015/564825 pmid:26413533 pmcid:PMC4564630 fatcat:4vwfolxl4baj5f6ob6mbolm7xa

Use of complementary and alternative medicine in pregnancy: a cross-sectional survey on Iraqi women

Jung Hye Hwang, Yu-Rim Kim, Mansoor Ahmed, Soojeung Choi, Nihad Qasim Al-Hammadi, Nameer Muhammad Widad, Dongwoon Han
2016 BMC Complementary and Alternative Medicine  
Due to the lack of strong evidence on safety and efficacy of complementary and alternative medicine (CAM) approaches, the use of CAM in women during pregnancy could be hazardous for mother and fetus. Meanwhile, little is known regarding the patterns, the reasons and the factors affecting use of CAM among pregnant women in Iraq. Methods: A cross sectional survey design was used to carry out face-to-face interviews with 335 consecutive pregnant women. The questionnaire comprised of three
more » ... socio-demographic characteristics, pregnancy-related aspects and the patterns and attitudes towards use of CAM. Determinants of CAM use were assessed through the logistic regression analysis. Results: Three hundred thirty-five pregnant women completed the questionnaire. 56.7 % reported using at least one form of CAM modalities. In total, 24 different types of CAM were used; with herbal medicine (53.7 %) and multivitamins (36.3 %) the most commonly used modalities. From the logistic regression analysis, the variables positively associated with CAM use were: rural residence (odds ratio (OR) 2.0, p < 0.01), no occupation (OR 2.7, p < 0. 05), high income (OR 2.0, p < 0.05), perceived healthy status (OR 2.6, p < 0.05) and ever use of contraception (OR 2.0, p < 0.01). Only 0.5 % of CAM users disclosed their CAM use to physicians. Conclusions: The proportion of CAM users among pregnant women is relatively high and it is important to learn what types of CAM they use. However, disclosure of CAM use was extraordinarily low. Given the low rate of disclosure, it should be ensured that physicians establish good level of communication with pregnant women and have adequate knowledge of CAM.
doi:10.1186/s12906-016-1167-0 pmid:27389024 pmcid:PMC4936269 fatcat:pfraa4kdmfbklcfwxv62nsibxa

Complementary and alternative medicine use among infertile women attending infertility specialty clinics in South Korea: does perceived severity matter?

Jung Hye Hwang, Yi Young Kim, Hyea Bin Im, Dongwoon Han
2019 BMC Complementary and Alternative Medicine  
Complementary and alternative medicine (CAM) use among infertile women is popular in many countries, including Korea. Previous research has repeatedly found more than half of infertile women surveyed use CAM therapies for fertility enhancement and overall well-being. However, there is currently little evidence to support this practice, and this raises the question of infertile women's experiences in the uptake of those modalities and sociodemographic and psychological factors associated with
more » ... use. Thus, this study aims to explore the perceptions and experiences of infertile women with regard to their use of CAM in Korea. A cross-sectional study was conducted using data from 263 infertile women attending infertility specialty clinics in Seoul, Korea, in June 2012. The survey instrument included 47 questions on the use of CAM, demographic characteristics, health status, and infertility related factors such as duration and type of infertility, experience and satisfaction of conventional treatment, and self-perceived severity of infertility condition. Chi-square test and logistic regression were used for data analysis. Among 286 respondents (response rate, 95.3%), a total of 263 women were included in the final analysis. 63.5% of respondents used one or more types of CAM modalities during infertility treatment. The utilization of CAM was associated with employment status, duration of infertility treatment, and self-perceived severity of the disease. The most commonly used CAM modalities were multivitamin and herbal medicine, and differences in types of CAM modalities used were found between the group with a higher rating of self-perceived disease severity and the lower perceived severity group. High prevalence of CAM use among infertile women was observed in Korea. Our findings support that infertile women's own understanding of their illness and physical condition influences self-care behavior such as CAM use. This calls for an urgent need for further in-depth study of the clinical effects of popular CAM modalities among infertile women when used in conjunction with conventional treatment.
doi:10.1186/s12906-019-2727-x pmid:31694617 pmcid:PMC6836421 fatcat:rwro2vzdzbfrtnj7v5voymdfsq
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