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Kwon, Yo Han,Woo, Sang‐,Wook,Jung, Hye‐,Ran,Yu, Hyung Kyun,Kim, Kitae,Oh, Byung Hun,Ahn, Soonho,Lee, Sang‐,Young,Song, Seung‐,Wan,Cho, Jaephil,Shin, Heon‐,Cheol,Kim, Je Y WILEY‐VCH Verlag 2012 Advanced Materials Vol.24 No.38
<P>The first ever demonstration of a cable‐type lithium ion battery architecture with outstanding omni‐directional flexibility is described by Je Young Kim, Heon‐Cheol Shin, and co‐workers on page 5192. The Front Cover image illustrates the unique battery architecture comprising a skeleton frame surrounding an empty space, that is, a hollow‐spiral anode with a multi‐helical structure. This design enables the battery to reliably power an LED screen or an MP3 player even under severe mechanical twisting and bending. </P>
Han-Na Kil,Sang-Yong Eom,Jung-Duck Park,Toshihiro Kawamoto,Yong-Dae Kim,Heon Kim 한국독성학회 2014 Toxicological Research Vol.30 No.1
Malondialdehyde (MDA), used as an oxidative stress marker, is commonly assayed by measuring the thiobarbituric acid reactive substances (TBARS) using HPLC, as an indicator of the MDA concentration. Since the HPLC method, though highly specific, is time-consuming and expensive, usually it is not suitable for the rapid test in large-scale environmental epidemiologic surveys. The purpose of this study is to develop a simple and rapid method for estimating TBARS levels by using a multiple regression equation that includes TBARS levels measured with a microplate reader as an independent variable. Twelve hour urine samples were obtained from 715 subjects. The concentration of TBARS was measured at three different wavelengths (fluorescence: ?λ-ex 530 nm and ?λ-em 550 nm; ?λ-ex 515 nm and ?λ-em 553 nm; and absorbance: 532 nm) using microplate reader as well as HPLC. 500 samples were used to develop a regression equation, and the remaining 215 samples were used to evaluate the validity of the regression analysis. The induced multiple regression equation is as follows: TBARS level (?μM) = ?0.282 + 1.830 × (TBARS level measured with a microplate reader at the fluorescence wavelengths ?λ-ex 530 nm and ?λ-em 550 nm, ?μM) ?0.685 × (TBARS level measured with a microplate reader at the fluorescence wavelengths ?λ-ex 515 nm and ?λ-em 553 nm, ?μM) + 0.035 × (TBARS level measured with a microplate reader at the absorbance wavelength 532 nm, ?μM). The estimated TBARS levels showed a better correlation with, and are closer to, the corresponding TBARS levels measured by HPLC compared to the values obtained by the microplate method. The TBARS estimation method reported here is simple and rapid, and that is generally in concordance with HPLC measurements. This method might be a useful tool for monitoring of urinary TBARS level in environmental epidemiologic surveys with large sample sizes.
Sung, Jin-Ho,Roy, Debananda,Oh, Joo-Sung,Back, Seung-Ki,Jang, Ha-Na,Kim, Seong-Heon,Seo, Yong-Chil,Kim, Jeong-Hun,Lee, Chong Bum,Han, Young-Ji Elsevier 2018 Atmospheric research Vol.203 No.-
<P><B>Abstract</B></P> <P>The percentage contribution of trans-boundary mercury (Hg) from China at different locations in South Korea was estimated from Hg anthropogenic emission distributions using the Hg dispersion model, CMAQ-Hg. This investigation quantifies the trans-boundary Hg emissions as contribution ratios. In addition, the long-range transportation frequency is also calculated, to verify inflow cases from China. The seasonal distribution of the Hg contribution ratio was found to be highest in winter (40%), followed by fall (16%). Seasonal observations of Hg inflow frequencies were estimated as 40%, 25%, 21%, and 4% in winter, fall, summer, and spring, respectively, at the same location. Such results would be produced by the wind generally blowing from the west and north-west with a speed of 5.0m/s and 4.5m/s, respectively, during winter and fall, around the study area. This study made an effort to quantify the trans-boundary Hg transport and to plot Hg anthropogenic emissions distribution in the region.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The trans-boundary Hg in Northeast Asian region was predicted by the CMAQ-Hg model using anthropogenic emission data. </LI> <LI> Amount of trans-boundary Hg was quantified between the countries as first attempt. </LI> <LI> Higher levels of trans-boundary Hg contribution from China to South Korea were recorded in winter and fall. </LI> <LI> Long-range transportation frequency and inflow cases from China to Korea were estimated by using the CMAQ-Hg model </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Graphical abstract of quantification of trans-boundary Hg in the region</P> <P>[DISPLAY OMISSION]</P>
Effect of replacing corn with soy hulls on nutrient digestibility of growing pigs
( Han Jin Oh ),( Won Yun ),( Ji Hwan Lee ),( Ji Seon An ),( Tae Heon Kim ),( Eun Ah Cho ),( Beom Jun Park ),( Ki Hyun Kim ),( Sung Dae Lee ),( Jin Ho Cho ) 한국축산학회(구 한국동물자원과학회) 2020 한국축산학회지 Vol.62 No.2
The objective of this study was to determine the effect of replacing corn with soy hulls on nutrient digestibility of growing pigs. Three experimental diets were tested using a 3 × 3 Latin square design using three barrows per group (Landrace × Yorkshire × Duroc, average initial body weight of 36.9 ± 4.0 kg) in individual metabolic cages. The dietary treatments were the control (CON) basal diet (corn-soybean meal based diet), whereas in the test diets, soy hulls were included at 5% (H1), 10% (H2), gradually replacing corn. The daily feed allowance was adjusted to 2.7 times the maintenance requirement for digestible energy (DE) (2.7 × 110 kcal of DE/kg BW0.75). Intake of crude fiber (CF) was different among treatments (p < 0.05). Pigs fed with H2 diet excreted higher concentrations of dry matter (DM), and CF than pigs fed with H1 diet and basal diet (p < 0.05). Pigs fed with H1 and H2 diets excreted higher concentrations of crude protein (CP) than pigs fed with CON diet (p < 0.05). The apparent total tract digestibility (ATTD) of CF from H1 and H2 diets were higher than CON diet (p < 0.05). Pigs fed with H2 diets were significantly lower (p < 0.05) the ATTD of CP than the pigs fed with CON and H1 diets. The current data suggest that 10% inclusion soy hulls can slightly decrease CP digestibility. However, soy hulls considerably increased CF digestibility.It is concluded that 5% soy hulls may be a usable alternative to corn in growing pig diets.
Han, Man Yop,Kim, Sung Bo,Kang, Tae Heon Techno-Press 2015 Advances in concrete construction Vol.3 No.2
Holed-Incrementally Prestressed Concrete (H-IPC) girders are designed using the following new design concepts. At first, web openings reduce the self-weight of the girder, and also diffuse prestressing tendon anchorages. The reduced end anchoring forces decrease the web thickness of the end sections. Additionally, precast technology help to improve the quality of concrete and to reduce the construction period at the site. For experimentally verification, two 50 m full-scale H-IPC girders are manufactured with different concrete strength of 55 MPa and 80 MPa. The safety, stiffness, ductility, serviceability and crack development of H-IPC girder are measured and compared with each other for different strengths. Both girders show enough strength to carry live load and good stiffness to satisfy the design criteria. The experimental result shows the advantages of using high strength concrete and adopting precast girder. The test data can be used as a criterion for safety control and maintenance of the H-IPC girder.
A Simple Method for Identifying Mechanical Parameters Based on Integral Calculation
Sang-Heon Han,Anno Yoo,Sang Won Yoon,Young-Doo Yoon 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.4
A method for the identification of mechanical parameters based on integral calculation is presented. Both the moment of inertia and the friction constant are identified by the method developed here, which is based on well-known mechanical differential equations. The mechanical system under test is excited according to a pre-determined low-frequency sinusoidal motion, minimizing the distortion, and increasing the accuracy of the results. The parameters are identified using integral calculation, increasing the robustness of the results against measurement noise. Experimental data are supported by simulation, confirming the effectiveness of the proposed technique. The performance improvements shown here are of use in the design of speed and position controllers and observers. Owing to its simplicity, this method can be readily applied to commercial inverter products.
Sung Chul Cha,Heon Joon Park,Jin Han Lee,Kwang Yool Ko,Chang Hyun Shin 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.3
The objective is to develop the complex coating technique with high quality and homogeneity of coating for spherical parts with diameter of 2 ~ 4 mm and stable mass production shall be secured with consideration of coating material, process and jig design. Silicon oxide-diamond like carbon (SiO-DLC) complex coating chemistry is expected to enhance the high temperature stability as opposed to DLC. Currently, the spherical part is first welded and then assembled with other parts, finally they are coated with DLC. However in this manner, the maximum charging in one coating batch is limited due to the very big size of the whole component which increases cost. Therefore the spherical part is to be coated before welding. Overall, reactive sputtering with high precision fixturing and masking technique resulted in the best overall properties for modern powertrain fuel system. The jig design was optimized with consideration of coating properties (height, width, thickness, inserting distance) and spherical parts were fixed at the jig with magnet plate. Coating material and process were determined with several trials. In conclusion the PVD+PACVD coated parts is developed and coatings with high quality, homogeneity and 30,000 inserting amount are secured. Coated parts are minimum 100 % more durable than non-coated parts.
Han Suji,Shin Hyemi,Lee Jin-Ku,Liu Zhaoqi,Rabadan Raul,Lee Jeongwu,Shin Jihye,Lee Cheolju,Yang Heekyoung,Kim Donggeon,Kim Sung Heon,Kim Jooyeon,Oh Jeong-Woo,Kong Doo-Sik,Lee Jung-Il,Seol Ho Jun,Choi J 생화학분자생물학회 2020 Experimental and molecular medicine Vol.52 No.-
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
A Simple Method for Identifying Mechanical Parameters Based on Integral Calculation
Han, Sang-Heon,Yoo, Anno,Yoon, Sang Won,Yoon, Young-Doo The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.4
A method for the identification of mechanical parameters based on integral calculation is presented. Both the moment of inertia and the friction constant are identified by the method developed here, which is based on well-known mechanical differential equations. The mechanical system under test is excited according to a pre-determined low-frequency sinusoidal motion, minimizing the distortion, and increasing the accuracy of the results. The parameters are identified using integral calculation, increasing the robustness of the results against measurement noise. Experimental data are supported by simulation, confirming the effectiveness of the proposed technique. The performance improvements shown here are of use in the design of speed and position controllers and observers. Owing to its simplicity, this method can be readily applied to commercial inverter products.