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Chih-Jen Yang,Yu-Jung Huang,Cheng-Yuan Wang,Chuan-Sheng Wang,Pei-Hui Wang,Jen-Yu Hung,Tung-Heng Wang,Hseng-Kuang Hsu,Hurng-Wern Huang,S.P. Anand Kumar,Ming-Shyan Huang,Ching-Feng Weng 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.1
Toona sinensis is a traditional Chinese herb, and the extracts of T. sinensis leaf possess a variety of biological functions. This study attempted to test the antiproliferative effect of TSL-1 (a bioactive fraction of T. sinensis) in H441 cells (lung adenocarcinoma). The data showed that the antiproliferative effect of TSL-1 on H441 cells is prominent using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. TSL-1-induced apoptosis was confirmed by cell morphology, sub-G1 peak accumulation, cleavage of poly(ADP)-ribose polymerase, and propidium iodide-annexin V double staining. Furthermore, decreased Bcl-2 accompanied by increased Bax (in western blotting) was found with TSL-1 treatment of H441 cells. TSL-1 treatment-induced G1 arrest was concurrent with the down-regulation of protein levels of cyclin D1 and cyclin-dependent kinase 4 in H441 cells. Peroral and intraperitoneal administrations of TSL-1 were performed to evaluate the therapeutic efficacy, and peroral administration of TSL-1 was also used to elucidate the therapeutic efficacy in the H441 cell xenograft model in vivo. The data revealed that TSL-1 treatment inhibited H441 tumor growth in both therapeutic and preventive experiments. Taken together, these results demonstrate that TSL-1 possesses the capability of preventing and alleviating lung cancer proliferation in vitro and in vivo with proven nephrological and hepatic safety and has the potential to be developed as an anti–lung cancer drug.
A Heuristic Algorithm for the Reliability Optimization of a Distributed Communication Network
Hung, Chih-Young,Yang, Jia-Ren,Park, Dong-Ho,Liu, Yi-Hsin The Korean Reliability Society 2008 International Journal of Reliability and Applicati Vol.9 No.1
A heuristic algorithm for reliability optimization of a distributed network system is developed so that the reliability of a large system can be determined efficiently. This heuristic bases on the determination of maximal reliability set of maximum node capacity, maximal link reliability and maximal node degree.
Hung-An Chen,Chun-Ching Chiu,Chih-Yang Huang,Li-Jeng Chen,Chun-Chou Tsai,Tsai-Ching Hsu,Bor-Show Tzang 한국식품영양과학회 2016 Journal of medicinal food Vol.19 No.7
Lactoferrin (LF) has beneficial effects against various diseases. However, the effects of LF on liver fibrosis in systematic lupus erythematosus (SLE) are unknown. In this study, NZB/W F1 mice were utilized to investigate the effects of LF on SLE. Experiments reveal that LF significantly increases glutathione and 1,1-diphenyl-2-picryl-hydrazyl levels and significantly decreased malondialdehyde levels in both serum and liver in NZB/W F1 mice. LF also lowered matrix metalloproteinase-9 activity and liver inflammatory indices, such as aminotransferase and alanine aminotransferase. Notably, significantly decreased expression of fibrotic related molecules, including transforming growth factor (TGF)-β1, tumor necrosis factor-α, interleukin-1β, and TGF-β1 receptor, were observed in the livers of NZB/W F1 mice that had been treated with LF. Significantly, suppressed Smad2/3 signaling, α-smooth muscle actin, and collagen deposition were also detected. These findings reveal that LF has beneficial effects on SLE by increasing antioxidant activities and ameliorating liver inflammation and fibrosis, suggesting the therapeutic effectiveness of LF against SLE.
Chih-Hai Yang,Chun-Hung A. Lin,Chien-Ru Lin 서울대학교 교육연구소 2011 Asia Pacific Education Review Vol.12 No.3
This paper analyzes the dynamics of rate of returns for postgraduate education and the determinants of wage premiums for postgraduate labor, especially for the impact of higher education expansions, in terms of quantity and quality, since the late 1990s in Taiwan. Utilizing quasi-panel data over the 1990-2004 period and employing the double fixed effect model, the empirical results first confirm the existence of wage premiums for workers with postgraduate degrees. However, the analysis on the dynamics of wage premiums finds that it ranged from only 1.40 to 11.67% and decreased sharply in 2004, indicating that the pecuniary reward for postgraduate qualification seems not to be as high as expected. Along with the rapid expansion of higher education, the concern about its negative impact on rate of returns to education is witnessed in this study. The sharp increase in the supply of postgraduate labors appears to have a negative impact on an individual's wage premium. Similarly, a decline in the postgraduate labor quality along with higher education expansion has contributed to a negative wage effect.
The Effects of Environmental Toxins on Allergic Inflammation
San-Nan Yang,Chong-Chao Hsieh,Hsuan-Fu Kuo,Min-Sheng Lee,Ming-Yii Huang,Chang-Hung Kuo,Chih-Hsing Hung 대한천식알레르기학회 2014 Allergy, Asthma & Immunology Research Vol.6 No.6
The prevalence of asthma and allergic disease has increased worldwide over the last few decades. Many common environmental factors are associated with this increase. Several theories have been proposed to account for this trend, especially those concerning the impact of environmental toxicants. The development of the immune system, particularly in the prenatal period, has far-reaching consequences for health during early childhood, and throughout adult life. One underlying mechanism for the increased levels of allergic responses, secondary to exposure, appears to be an imbalance in the T-helper function caused by exposure to the toxicants. Exposure to environmental endocrine-disrupting chemicals can result in dramatic changes in cytokine production, the activity of the immune system, the overall Th1 and Th2 balance, and in mediators of type 1 hypersensitivity mediators, such as IgE. Passive exposure to tobacco smoke is a common risk factor for wheezing and asthma in children. People living in urban areas and close to roads with a high volume of traffic, and high levels of diesel exhaust fumes, have the highest exposure to environmental compounds, and these people are strongly linked with type 1 hypersensitivity disorders and enhanced Th2 responses. These data are consistent with epidemiological research that has consistently detected increased incidences of allergies and asthma in people living in these locations. During recent decades more than 100,000 new chemicals have been used in common consumer products and are released into the everyday environment. Therefore, in this review, we discuss the environmental effects on allergies of indoor and outside exposure.
High-Quality and Robust Reversible Data Hiding by Coefficient Shifting Algorithm
Ching-Yu Yang,Chih-Hung Lin 한국전자통신연구원 2012 ETRI Journal Vol.34 No.3
This study presents two reversible data hiding schemes based on the coefficient shifting (CS) algorithm. The first scheme uses the CS algorithm with a mean predictor in the spatial domain to provide a large payload while minimizing distortion. To guard against manipulations,the second scheme uses a robust version of the CS algorithm with feature embedding implemented in the integer wavelet transform domain. Simulations demonstrate that both the payload and peak signal-tonoise ratio generated by the CS algorithm with a mean predictor are better than those generated by existing techniques. In addition, the marked images generated by the variant of the CS algorithm are robust to various manipulations created by JPEG2000 compression, JPEG compression, noise additions, (edge) sharpening, low-pass filtering, bit truncation, brightness, contrast, (color)quantization, winding, zigzag and poster edge distortion,and inversion.
Stability analysis of steel cable-stayed bridges
Tang, Chia-Chih,Shu, Hung-Shan,Wang, Yang-Cheng Techno-Press 2001 Structural Engineering and Mechanics, An Int'l Jou Vol.11 No.1
The objective of this study is to investigate the stability behavior of steel cable-stayed bridges by comparing the buckling loads obtained by means of finite element methods with eigen-solver. In recent days, cable-stayed bridges dramatically attract engineers' attention due to their structural characteristics and aesthetics. They require a number of design parameters and present a high degree of static indetermination, especially for long span bridges. Cable-stayed bridges exhibit several nonlinear behaviors concurrently under normal design loads due to the individual nonlinearity of substructures such as the pylons, stay cables, and bridge deck, and their interactions. The geometric nonlinearities arise mainly from large displacements of cables. Strong axial and lateral forces acting on the bridge deck and pylons cause structural nonlinear behaviors. The interaction is among the substructures. In this paper, a typical three-span steel cable-stayed bridge with a variety of design parameters has been investigated. The numerical results indicate that the design parameters such as the ratio of $L_1/L$ and $I_p/I_b$ are important for the structural behavior, where $L_1$ is the main span length, L is the total span length of the bridge, $I_p$ is the moment of inertia of the pylon, and $I_b$ is the moment of inertia of the bridge deck. When the ratio $I_p/I_b$ increases, the critical load decreases due to the lack of interaction among substructures. Cable arrangements and the height of pylon are another important factors for this type of bridge in buckling analysis. According to numerical results, the bridges supported by a pylon with harp-type cable arrangement have higher critical loads than the bridges supported by a pylon with fan-type cable arrangement. On contrary, the shape of the pylon does not significantly affect the critical load of this type of bridge. All numerical results have been non-dimensionalized and presented in both tabular and graphical forms.