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Kim, Jungx2010,Ae,Karadeniz, Fatih,Ahn, Byulx2010,Nim,Kwon, Myeong Sook,Mun, Okx2010,Ju,Bae, Min Joo,Seo, Youngwan,Kim, Mihyang,Lee, Sangx2010,Hyeon,Kim, Yuck Yong,Mix2010,Soon, Jang,Kong, C John Wiley Sons, Ltd 2016 Journal of the Science of Food and Agriculture Vol.96 No.3
<P>BACKGROUND: Health problems related to the lack of bone formation are a major problem for ageing populations in the modern world. As a part of the ongoing trend to develop natural substances that attenuate bone loss in osteoporosis, the effects of the edible brown alga Sargassum thunbergii and its active contents on adipogenic differentiation in 3T3-L1 fibroblasts and osteoblast differentiation inMC3T3-E1 pre-osteoblasts were evaluated. RESULTS: Treatment with S. thunbergii significantly reduced lipid accumulation and expression of adipogenic differentiation markers such as peroxisome proliferator-activated receptor gamma , CCAAT/enhancer- binding protein.. and sterol regulatory element binding protein 1c. In addition, S. thunbergii successfully enhanced osteoblast differentiation as indicated by increased alkaline phosphatase activity along raised levels of osteoblastogenesis indicators, namely bone morphogenetic protein-2, osteocalcin and collagen type I. Two compounds, sargaquinoic and sargahydroquinoic acid, were isolated fromactive extract and shown to be active by means of osteogenesis inducement. CONCLUSION: S. thunbergii could be a source for functional food ingredients for improved treatment of osteoporosis and obesity. (C) 2015 Society of Chemical Industry</P>
<i>Swift</i>,<i>XMM</i>-<i>Newton</i>, and<i>NuSTAR</i>Observations of PSR J2032+4127/MT91 213
Li, K. L.,Kong, A. K. H.,Tam, P. H. T.,Hou, X.,Takata, J.,Hui, and C. Y. American Astronomical Society 2017 The Astrophysical journal Vol.843 No.2
<P>We report our recent Swift, NuSTAR, and XMM-Newton X-ray and Lijiang optical observations on PSR J2032 + 4127/MT91 213, the gamma-ray binary candidate with a period of 45-50 years. The coming periastron of the system was predicted to be in 2017 November, around which high-energy flares from keV to TeV are expected. Recent studies with Chandra and Swift X-ray observations taken in 2015/2016 showed that its X-ray emission has been brighter by a factors of similar to 10 than that before 2013, probably revealing some ongoing activities between the pulsar wind and the stellar wind. Our new Swift/XRT lightcurve shows no strong evidence of a single vigorous brightening trend, but rather several strong X-ray flares on weekly to monthly timescales with a slowly brightening baseline, namely the low state. The NuSTAR and XMM-Newton observations taken during the flaring and the low states, respectively, show a denser environment and a softer power-law index during the flaring state, implying that the pulsar wind interacted with the stronger stellar winds of the companion to produce the flares. These precursors would be crucial in studying the predicted giant outburst from this extreme gamma-ray binary during the periastron passage in late 2017.</P>
Face changing companion of the redback millisecond pulsar PSR J1048+2339
Yap, Y. X.,Li, K. L.,Kong, A. K. H.,Takata, J.,Lee, J.,Hui, C. Y. Springer-Verlag 2019 Astronomy and astrophysics Vol.621 No.-
<P>We present optical observations of the redback millisecond pulsar PSR J1048+2339, which is a 4.66 ms radio pulsar in a compact binary with an orbital period of six hours. We obtained high-quality light curves of PSR J1048+2339 with the Lulin 1 m Telescope. The system shows two distinct six-hour orbital modulations, in which an ellipsoidal modulation changes into a sinusoidal-like profile in less than 14 days. In addition to the change, the brightness of the companion increased by one magnitude, suggesting that the latter type of modulation is caused by the pulsar wind heating of the companion and that the heating became dominant in the system. While the changes are not unexpected, such a timescale is the shortest among similar systems. We performed modeling analysis to extract the properties of the system. We obtained a derived pulsar mass of 2.1 <I>M</I>⊙ and a companion star mass of 0.4 <I>M</I>⊙ for the system. The irradiation power increased by a factor of 6 during which the pulsar wind heating dominates. We also report on the two archival <I>Chandra</I> X-ray observations and discuss several possibilities that might cause the varying heating on the companion.</P>
X. Kong,C. Quinard,T. Barriere,J-C. Gelin 한국소성가공학회 2010 기타자료 Vol.2010 No.6
Manufacturing of 3D micro-components by powder injection molding process consists of four main stages: preparation of the feedstock of metal powders and binders, injection of powder/binder feedstock using micro-injection molding equipment, thermal or solvent debinding and sintering by solid state diffusion. For our research pruposes, the feedstocks have been realized with stainless steel 316L powders of 3.4μm (D50) and polymer binders. Finite element method has been used for the simulation in order to estimate shrinkage, relative density and evolution of the shapes of the micro-components, the parameters used in the sintering model have been identified in using Matlab® procedures before to be used in the simulation with Abaqus®.
허영헌(Y. X. Xu),공상복(S. B. Kong),송정근(C. K. Song),황성범(S. B. Hwang) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7
We fabricated organic integrated circuits on PEN substrate by using pentacene TFTs, such as inverter, ring oscillator, NAND and NOR gates, and rectifier. The OTFTs used bottom contact structure and produced the average mobility of 0.26 ㎠/V.sec and on/off current ratio of 10?. All circuits worked successfully like the simulation results. Especially, the rectifier was able to operate up to 1 ㎒ input signals, and ring oscillator exhibited oscillation frequency of 1㎒ at 40 V.
Wang, B .,Kong, L . X .,Hodgson, P . D .,Collinson, D . C . 대한금속재료학회(대한금속학회) 1998 METALS AND MATERIALS International Vol.4 No.4
The hot strength of austenitic steels of different carbon contents was modelled using an artificial neural network (ANN) model with optimum training data. As training data employed in a traditional neural network model were randomly selected from experimental data, they were not representative and the prediction accuracy and efficiency were therefore significantly affected. In this work, only representatively experimental data were used for training and during the procedure, one tenth of the training data extracted from experiment were used for testing the training model and terminating the modelling. The effects of the carbon con tent on flow stress, peak strains and peak stresses observed from the experiment for both training and test data were accurately represented with the ANN scheme reported in this work.
Liu, Z.H.,Yang, F.Y.,Kong, L.J.,Lai, C.H.,Piao, X.S.,Gu, Y.H.,Ou, X.Q. Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.10
A single factorial experiment was conducted to test the effects of three dietary levels of energy on mRNA expression of fatty acid synthase (FAS-mRNA) and hormone-sensitive lipase (HSL-mRNA) and their association with intramuscular fat in finishing pigs. 72 crossbred (Large $White{\times}Rongchang$) barrows with an average initial body weight of 20.71 (s.e. 0.1) kg, were randomly allotted to three dietary treatments (11.75, 13.05 and 14.36 MJ DE/kg) and fed until slaughtered at 100 or 101 kg. The diets were iso-nitrogenous and iso-essential amino acids. The growth performances including the duration of finishing were changed linearly (p<0.05) or quadratically (p<0.05) with increased dietary energy levels. The effects of dietary energy content on the percentage of external fat, intramuscular backfat and the fat thickness were linear (p<0.05). The content of dietary energy increased FAS-mRNA linearly or quadratically, while HSL-mRNA decreased linearly or quadratically in backfat and Longissmus dorsi muscle. Meanwhile, significant positive correlations (p<0.05) were found between energy level and intramuscular fat, FAS-mRNA or the ratio of FAS-mRNA to HSL-mRNA, between the ratio of FAS-mRNA to HSL-mRNA and intramuscular fat. However, the correlations between HSL mRNA and dietary energy or intramuscular fat were negative (p<0.05). The results indicated that dietary energy level regulates lipid accumulation, especially intramuscular fat, possibly by modulating the mRNA of FAS and HSL together rather than individually.