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Brain Factor-7 Extracted from Bombyx mori Enhances Cognition and Attention in Normal Children
Kunwoo Kim,박수빈,유한익,이준영,정희연,Do-Hee Kim,이현정,Jin-Young Kim,윤영철,Maurice R. Marshall,김성수,Yoonhwa Jeong 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.3
It has been reported that brain factor-7 (BF-7) extracted from Bombyx mori improves cognitive functions in normal juveniles and adults as well as cognitively impaired patients. Clinical studies with normal children evaluated the role of BF-7 on brain function in these patients. The objective of this study was to improve cognitive functions of normal schoolchildren with BF-7. Forty-six normal healthy children were divided into two treatment groups: BF-7 (9.9±1.18 years old; 9 boys, 14 girls) and placebo (9.8±1.03 years old; 10 boys, 13 girls). The Color Trails Making Test was used to measure the efficacy of BF-7 on cognition and attention. Results showed that BF-7 reduced the response time by an average of 23% for the Color Trails Making Test. Moreover, BF-7 improved the accuracy of the task around twofold. The results reveal that BF-7 improves brain function for attention and cognitive flexibility in children.
A Wideband On-Interposer Passive Equalizer Design for Chip-to-Chip 30-Gb/s Serial Data Transmission
Heegon Kim,Jonghyun Cho,Joohee Kim,Sumin Choi,Kiyeong Kim,Junho Lee,Kunwoo Park,Pak, Jun So,Joungho Kim IEEE 2015 IEEE transactions on components, packaging, and ma Vol.5 No.1
<P>In this paper, a novel on-interposer passive equalizer is proposed for chip-to-chip high-speed data transmission on the silicon-based on-interposer channel. The proposed equalizer uses the parasitic resistance and inductance of the on-interposer shunt metal lines to produce the high-pass filter. This filter enables the proposed equalizer to exhibit wideband channel equalization and low power-consumption. Based on the equivalent-circuit model of the proposed on-interposer passive equalizer, the physical dimensions of the equalizer are optimized for 30-Gb/s serial data transmission. The performance of the proposed equalizer with the optimized dimensions was successfully demonstrated by both frequency- and time-domain measurements at data rates of up to 30 Gb/s. In addition, a compact on-interposer passive equalizer was designed for the wide I/O interposer using the same mechanism. The improved quality of serial data transmission in the equalized wide I/O on-interposer channel was successfully verified by simulations at data rates of up to 10 Gb/s.</P>
3D virtual simulator for breast plastic surgery
Kim, Youngjun,Lee, Kunwoo,Kim, Wontae John Wiley Sons, Ltd. 2008 Computer Animation and Virtual Worlds Vol. No.
<P>We have proposed novel 3D virtual simulation software for breast plastic surgery. Our software comprises two processes: a 3D torso modeling and a virtual simulation of the surgery result. First, image-based modeling is performed in order to obtain a female subject's 3D torso data. Our image-based modeling method utilizes a template model, and this is deformed according to the patient's photographs. For the deformation, we applied procrustes analysis and radial basis functions (RBF). In order to enhance reality, the subject's photographs are mapped onto a mesh. Second, from the modeled subject data, we simulate the subject's virtual appearance after the plastic surgery by morphing the shape of the breasts. We solve the simulation problem by an example-based approach. The subject's virtual shape is obtained from the relations between the pair sets of feature points from previous patients' photographs obtained before and after the surgery. Copyright © 2008 John Wiley & Sons, Ltd.</P>
Kim, Sukwoo,Kim, Minseok,An, Hyunuk,Chun, Kunwoo,Oh, Hyun-Joo,Onda, Yuichi Elsevier 2019 Catena Vol.182 No.-
<P><B>Abstract</B></P> <P>High resolution DEMs and physical soil strength, among other factors, have significant effects on the shallow landslide instability mapping. Subsurface flow in soil mantle normally is assumed by slope parallel flow based on resolution of DEMs and, measuring soil strength, which is affected by subsurface flow within the soil mantle, is difficult in both the field and the laboratory. Thus, the aims of this study are to investigate the effect of subsurface flow by high resolution Lidar DEMs and the effect of physical soil strength attributes on shallow landslide instability mapping, respectively. In this study, two DEMs (with 1 m and 5 m resolutions) were used and, physical soil strength was calibrated using a simple subsurface hydrological concept with LiDAR and field survey data in order to quantify the influence of soil strength on shallow landslide instability mapping. To this end, various field surveys were performed at Woomyeon Mountain, Seoul, Republic of Korea, where shallow landslides occurred in 2012. The physical shallow landslide stability (SHALSTAB) model were applied. The modified success rate (MSR) method were applied to assess the predicted results. In the first series of simulations, using the two DEMs and experimentally derived soil strength values, relatively low MSR values of 0.42–0.468 for the 1 m DEM and 0.42–0.47 for the 5 m DEM were recorded. In the second series of simulations, using soil strength calibrated using a simple theoretical approach, the MSR for the 1 m DEM was 0.78–0.823 and the MSR for the 5 m DEM was 0.723–0.80. These results indicated that soil strength had a more important role in shallow landslide instability mapping than assuming subsurface flow by topographic resolution. Therefore, it may be useful to apply field-collected soil strength data using hydrological concepts to improve the accuracy of predictive models based on high-resolution surface data.</P> <P><B>Highlights</B></P> <P> <UL> <LI> 1 m resolution DEM and 5 m resolution DEM conducted from Lidar were used. </LI> <LI> The soil strength values were calculated using a simple hydrologic concept with field survey data and Lidar. </LI> <LI> Shallow landslide instability were affected by soil strength than high resolution DEMs. </LI> </UL> </P>
Advantages of the single nucleotide polymorphism-based noninvasive prenatal test
Kim, Kunwoo Korean Society of Medical Genetics and Genomics 2015 대한의학유전학회지 Vol.12 No.2
Down syndrome screening with cell-free DNA (cfDNA) in the maternal plasma has recently received much attention in the prenatal diagnostic field. Indeed, a large amount of evidence has already accumulated to show that screening tests with cfDNA are more sensitive and specific than conventional maternal serum and/or ultrasound screening. Globally, more than 1,000,000 of these noninvasive prenatal tests (NIPTs) have been performed to date. There are several different methods for NIPTs that are currently commercially available, including shotgun massively parallel sequencing, targeted massively parallel sequencing, and single nucleotide polymorphism (SNP)-based methods. All of these methods have their own advantages and disadvantages. In this review, I will focus specifically on the SNP-based NIPT.
Planar Hall Resistance Sensor for Monitoring Current
KunWoo Kim,Sri Ramulu Torati,Venu Reddy,SeokSoo Yoon 한국자기학회 2014 Journal of Magnetics Vol.19 No.2
Recent years have seen an increasing range of planar Hall resistive (PHR) sensor applications in the field of magnetic sensing. This study describes a new application of the PHR sensor to monitor a current. Initially, thermal drift experiments of the PHR sensor are performed, to determine the accuracy of the PHR signal output. The results of the thermal drift experiments show that there is no considerable drift in the signals attained from 0.1, 0.5, 1 and 2 mA current. Consequently, the PHR sensor provides adequate accuracy of the signal output, to perform the current monitoring experiments. The performances of the PHR sensor with bilayer and trilayer structures are then tested. The minimum detectable currents of the PHR sensor using bilayer and trilayer structures are 0.51 μA and 54 nA, respectively. Therefore, the PHR sensor having trilayer structure is the better choice to detect ultra low current of few tens nanoampere.
Kim, Yeonghun,Lee, Kunwoo,Moon, Jeheon,Koo, Dohoon,Park, Jaewoo,Kim, Kyengnam,Hong, Daehie,Shin, Inshik The Society of Physical Therapy Science 2014 JOURNAL OF PHYSICAL THERAPY SCIENCE Vol.26 No.4
<P> [Purpose] The aim of this study was to present an individualized resistance training method to enable exercise while maintaining an exercise load that is set according to an individual’s joint angle-torque using a haptic-based resistance training machine. [Methods] Five participants (machine group) performed individualized shoulder internal and external rotation training with a haptic resistance training machine, while another five participants performed general dumbbell-based shoulder internal and external rotation training for eight weeks. Internal and external rotation powers of subjects were measured using an isokinetic machine before and after training. [Results] The average powers of both shoulder internal and external rotation has been improved after training (25.72%, 13.62%). The improvement in power of external rotation in the machine group was significantly higher than that in the control group. [Conclusion] This study proposes a haptic-based individualized rotator cuff muscle training method. The training protocol maintaining the joint angle-torque profile showed better improvement of shoulder internal/external rotation than dumbbell training.</P>