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Search Results: 1 - 10 of 32264 matches for " So-Young Lee "
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The associations between socioeconomic status and obesity in Korean children from 1998 to 2009  [PDF]
So-Young Nam, Soo-Kyung Lee
Health (Health) , 2013, DOI: 10.4236/health.2013.511256
Abstract:

Increasing interests have been shown in associations between socioeconomic status (SES) and obesity in relation to health inequality. The research objectives were 1) to examine associations between SES and child obesity (including overweight) in Korea over 10 years and 2) to explore possible underlying mechanisms of relationships between SES and obesity. This study used the nationally representative data (KNHA-NES) from 1998, 2005, to 2009. Children (10-18 year-old) were grouped by household income (low, middle-low, middle-high and high) adjusted for the number of family members. Z-scores of height, weight, and BMI for each child were calculated from measured anthropometric data using the 2007 Korean national growth charts. No statistically significant associations were found, however, changes in association patterns were noted. The lower SES group showed shorter height as well as lighter weight among Korean children. More research should be conducted to understand the effects of socioeconomic status on child obesity.

 

Multicenter Retrospective Analysis of the Effectiveness and Safety of Rituximab in Korean Patients with Refractory Systemic Lupus Erythematosus
So-Young Bang,Chang Keun Lee,Young Mo Kang,Hyoun-Ah Kim
Autoimmune Diseases , 2012, DOI: 10.1155/2012/565039
Abstract:
Field Implementation of Wireless Vibration Sensing System for Monitoring of Harbor Caisson Breakwaters
Han-Sam Yoon,So-Young Lee,Jeong-Tae Kim,Jin-Hak Yi
International Journal of Distributed Sensor Networks , 2012, DOI: 10.1155/2012/597546
Abstract:
Effective Location Acquisition Control Algorithms for the Location-Based Alert Services in Mobile Environments
So-Young Kang,Kwang-Jo Lee,Sung-Bong Yang
International Journal of Computer Networks & Communications , 2010,
Abstract: The location-based alert services can be regarded as the one of the most practical locationbasedservices. For the services, an alert service system for the services alerts mobile device users whenthey enter into or leave from predefined specific regions, and provides certain services previously askedby the users for special purposes such as security. For providing proper services the alert service systemshould acquire the location information of the users periodically. However, the system that handles thelocations of the users may face serious problems as the number of users increases fast. Hence it is acritical issue to properly adjust the time interval of location data acquisitions while maintaining theaccuracy of the services. In this paper we propose effective location acquisition algorithms; the speedbasedacquisition algorithm, the angle–based acquisition algorithm, and the hybrid algorithm combiningthe speed with the angle-based algorithms. We also present three grid-based acquisition algorithms inwhich a longer time interval is used when a user is not near the alert areas. The proposed algorithmscould reduce the amount of location information to be acquired based on the movement of the users. Theaverage numbers of location acquisitions of the speed-based, the angle–based, and the hybrid algorithmswere reduced by 19.2%, 35.8%, and 35.6% over the distance-based algorithm, respectively, while theymaintained the almost same level of accuracy. Among the grid-based algorithms, the grid-angleacquisition algorithm further improved the average number of acquisitions by 5.2% over the angle-basedalgorithm, which is 41.0% improvement over the distance-based algorithm. The experimental results alsoshow that all the grid-based algorithms showed almost equal accuracy.
Improvement of Upper Extremity Lymphedema after Delayed Breast Reconstruction with an Extended Latissimus Dorsi Myocutaneous Flap
Kyeong Tae Lee,So-Young Lim,Jai-Kyung Pyun,Goo-Hyun Mun
Archives of Plastic Surgery , 2012, DOI: http://dx.doi.org/10.5999/aps.2012.39.2.154
Abstract: Lymphedema is a common complication after mastectomy in breast cancer patients. Manytreatment options are available, but no treatment results in a complete cure. We report acase of lymphedema that occurred after modified radical mastectomy in a breast cancerpatient who showed objective improvement after delayed breast reconstruction with anlatissimus dorsi myocutaneous flap. A 41-year-old female patient with left breast cancer hadundergone modified radical mastectomy with axillary lymph node dissection and postoperativeradiotherapy 12 years previously. Four years after surgery, lymphedema developed andincreased in aggravation despite conservative treatment. Eight years after the first operation,the patient underwent delayed breast reconstruction using the extended latissimus dorsimyocutaneous flap method. After reconstruction, the patient’s lymphedema symptomsshowed dramatic improvement by subjective measures including tissue softness and feeling oflightness, and by objective measures of about 7 mL per a week, resulting in near normal rangesof volume. At a postoperative follow-up after 3 years, no recurrence was observed. Delayedbreast reconstruction with extended latissimus dorsi myocutaneous flaps may be helpful topatients with lymphedema after mastectomy. This may be a good option for patients who areworried about the possibility of the occurrence or aggravation of secondary lymphedema.
Field Implementation of Wireless Vibration Sensing System for Monitoring of Harbor Caisson Breakwaters
Han-Sam Yoon,So-Young Lee,Jeong-Tae Kim,Jin-Hak Yi
International Journal of Distributed Sensor Networks , 2012, DOI: 10.1155/2012/597546
Abstract: A wireless sensing system for structural health monitoring (SHM) of harbor caisson structures is presented. To achieve the objective, the following approaches were implemented. First, a wave-induced vibration sensing system was designed for global structural health monitoring. Second, global SHM methods which are suitable for damage monitoring of caisson structures were selected to alarm the occurrence of unwanted behaviors. Third, an SHM scheme was designed for the target structure by implementing the selected SHM methods. Operation logics of the SHM methods were programmed based on the concept of the wireless sensor network. Finally, the performance of the proposed system was globally evaluated for a field harbor caisson structure for which a series of tasks were experimentally performed by the wireless sensing system. 1. Introduction According to a report of the Intergovernmental Panel on Climate Change [1], global warming is unambiguous. As sea surface temperature increases, water vapor in the lower troposphere also increases, and so does the energy of typhoons. The relationship between global warming and increased typhoon activity and intensity has been verified, reported by studies based on analyses of historical records and simulation results [2–4]. It was also reported that typhoons in the western North Pacific (WNP), including Korea, have become more intense as measured by their frequency in hurricane categories 4 and 5 [5] or the power dissipation index [3]. A strong typhoon usually brings strong winds and heavy rains, causes severe surge and floods, and then results in significant loss of life and property. Accordingly, the increase of typhoon intensity and frequency makes severer damages over the Pacific Ocean from the Philippine Islands to Taiwan, Japan, Korea, and the southwestern coast of China. In general, coastlines, interfaces between ocean and land, are facing a severe state of typhoon than inland; thus, the safety of coastal structures becomes more significant under storm waves. The safety can be checked in a regular or irregular time scale, depending on the state of the target coastal structures and occurrence of extreme loading conditions such as typhoons. The safety is usually done by structural health monitoring (SHM) to identify existing damages in the target structures, gravity type or pile type, and finally to make an assessment of their healthy status. In the gravity-type coastal structures, the damages can be classified into settlement, overturning, or sliding. Local defects such as scouring and disturbance in foundation can
Membrane Fusion Proteins of Type I Secretion System and Tripartite Efflux Pumps Share a Binding Motif for TolC in Gram-Negative Bacteria
Minho Lee, So-Young Jun, Bo-Young Yoon, Saemee Song, Kangseok Lee, Nam-Chul Ha
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0040460
Abstract: The Hly translocator complex of Escherichia coli catalyzes type I secretion of the toxin hemolysin A (HlyA). In this complex, HlyB is an inner membrane ABC (ATP Binding Cassette)-type transporter, TolC is an outer membrane channel protein, and HlyD is a periplasmic adaptor anchored in the inner membrane that bridges HlyB to TolC. This tripartite organization is reminiscent of that of drug efflux systems such as AcrA-AcrB-TolC and MacA-MacB-TolC of E. coli. We have previously shown the crucial role of conserved residues located at the hairpin tip region of AcrA and MacA adaptors during assembly of their cognate systems. In this study, we investigated the role of the putative tip region of HlyD using HlyD mutants with single amino acid substitutions at the conserved positions. In vivo and in vitro data show that all mutations abolished HlyD binding to TolC and resulted in the absence of HlyA secretion. Together, our results suggest that, similarly to AcrA and MacA, HlyD interacts with TolC in a tip-to-tip manner. A general model in which these conserved interactions induce opening of TolC during drug efflux and type I secretion is discussed.
Vibration Characteristics of Gravity-Type Caisson Breakwater Structure with Water-Level Variation
So-Young Lee,Thanh-Canh Huynh,Jeong-Tae Kim,Han-Sam Yoon,Sang-Hun Han
International Journal of Distributed Sensor Networks , 2013, DOI: 10.1155/2013/261396
Abstract: Vibration characteristics of gravity-type caisson breakwater structures which have water-level variations are experimentally examined by using wave load excitations. To achieve the objective, the following approaches are implemented. Firstly, vibration analysis methods are selected to examine the dynamic characteristics of the lab-scale caisson. Secondly, vibration test on a lab-scale caisson which is installed in a two-dimensional wave flume is performed under several excitation sources and water levels. Thirdly, the compatibility of the wave-induced vibration responses is evaluated by comparison with the impact vibration responses, and the appropriate vibration analysis method is selected. Finally, the water-level effects on the caisson breakwater are examined based on the modal parameters which are experimentally measured for the 2D wave flume tests. 1. Introduction Genesis frequency of large-scale typhoon has been increased and it results in huge losses of both life and property. In particular, coastal structures are directly faced with extreme wave loading condition. Due to these severe environmental phenomena and extreme events like typhoon or ship collision, structural integrity of harbor structure becomes a more important issue. Most breakwater structures are constructed as gravity-type. Moreover, large gravity-type caissons become popular for constructing breakwaters. Despite the advance in the modern construction technology, damage in the harbor caisson breakwater is inevitable due to local failure or global instability problems which are mostly attributed to foundation-structure interface [1]. Goda [2] and Takahashi et al. [3] also reported that the sliding at the foundation-structure interface is the primary damage of caissons. Also, the cavity in foundation mound or the backfill makes harbor caissons weaker against extreme loads such as storm waves, mainly occurring from typhoon. Figure 1 illustrates the local and global failures of the vertical breakwater. Oumeraci [4] has classified damage of vertical breakwater to overall failures and local failures. The overall failures such as sliding, overturning, and settlement, affect the stability of the entire structure. The local failures do not affect the structural stability as it is. The local failure, however, contributes to make unexpected water flow and it causes reduction of breaking performance of breakwater. Progress of the local failures can lead to the overall failures. It is noted that all damages of vertical breakwaters are related to integrity of the foundation mound. Therefore, the
Antidiabetic Effect of Morinda citrifolia (Noni) Fermented by Cheonggukjang in KK-Ay Diabetic Mice
So-Young Lee,So-Lim Park,Jin-Taek Hwang,Sung-Hun Yi,Young-Do Nam,Seong-Il Lim
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/163280
Abstract: Antidiabetic effects of Morinda citrifolia (aka Noni) fermented by Cheonggukjang (fast-fermented soybean paste) were evaluated using a T2DM (type 2 diabetes mellitus) murine model. Six-week-old KK-Ay/TaJcl mice were randomly divided into four groups: (1) the diabetic control (DC) group, provided with a normal mouse diet; (2) the positive control (PC) group, provided with a functional health food diet; (3) the M. citrifolia (MC) group, provided with an MC-based diet; (4) the fermented M. citrifolia (FMC) group, provided with an FMC-based diet. Over a testing period of 90 days, food and water intake decreased significantly in the FMC and PC groups compared with the DC group. Blood glucose levels in the FMC group were 211.60–252.20 mg/dL after 90 days, while those in the control group were over 400 mg/dL after 20 days. In addition, FMC supplementation reduced glycosylated hemoglobin (HbA1c) levels, enhanced insulin sensitivity, and significantly decreased serum triglycerides and low-density lipoprotein (LDL) cholesterol. Furthermore, a fermented M. citrifolia 70% ethanolic extract (FMCE) activated peroxisome proliferator-activated receptor-(PPAR-) γ and stimulated glucose uptake via stimulation of AMP-activated protein kinase (AMPK) in cultured C2C12 cells. These results suggest that FMC can be employed as a functional health food for T2DM management.
An Optimization of Composition Ratio among Triple-Filled Atoms in System
So-Young Kim,Soon-Mok Choi,Won-Seon Seo,Young Soo Lim,Soonil Lee,Il-Ho Kim,Hyung Koun Cho
Journal of Nanomaterials , 2013, DOI: 10.1155/2013/973060
Abstract: Bulk nanostructured materials are important as energy materials. Among thermoelectric materials, the skutterudite system of CoSb3 is a representative material of bulk nanostructured materials. Filling a skutterudite structure with atoms that have different localized frequencies (also known as triple filling) was reported to be effective for lowering thermal conductivity. Among studies representing superior power factors, In-filled skutterudite systems showed higher Seebeck coefficients. This study sought to optimize the composition ratio among the triple-filled atoms in an system. The composition dependence of the thermoelectric properties was investigated for specimens with different ratios among the three kinds of filler atoms in the system. In addition, the process variables were carefully optimized for filled skutterudite systems to obtain a maximum value. 1. Introduction Bulk nanostructured materials are a key research topic as energy materials. Materials for energy applications should satisfy the needs of both high conversion efficiency and large power output. Nanostructures are required for the high performance of materials, but bulk materials are needed to produce large power output. In thermoelectric materials, the skutterudite system found in CoSb3 is a representative material of bulk nanostructured materials [1, 2]. For example, high-performance bulk nanostructured materials have been manufactured using this system by filling the Sb-dodecahedron voids in the CoSb3 skutterudites with foreign ions such as rare-earth elements, alkalines, and alkaline-earth metals (thereby forming filled skutterudites). These weakly bound filler atoms with their independent vibrational modes were reported to interact with the normal modes of the structure and suppress thermal conductivity dramatically [2]. The efficiency of a thermoelectric material is determined by its dimensionless thermoelectric figure-of-merit , where , , , and are the Seebeck coefficient, electrical conductivity, total thermal conductivity, and absolute temperature, respectively. Therefore, good thermoelectric materials should have a high power factor value and a low thermal conductivity value. For this reason, CoSb3-based skutterudites have stimulated much scientific interest. These filler atoms have been reported to play many roles. When the filler atoms are doped into the skutterudite system, they make chemical bonds with Sb ions. They can act as donor ions in an -type CoSb3 matrix, increasing carrier concentration [3, 4]. The filler atoms can also serve as a phonon scattering center,
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