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GPU-Accelerated Single Image Depth Estimation with Color-Filtered Aperture
( Yueh-teng Hsu ),( Chun-chieh Chen ),( Shu-ming Tseng ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.3
There are two major ways to implement depth estimation, multiple image depth estimation and single image depth estimation, respectively. The former has a high hardware cost because it uses multiple cameras but it has a simple software algorithm. Conversely, the latter has a low hardware cost but the software algorithm is complex. One of the recent trends in this field is to make a system compact, or even portable, and to simplify the optical elements to be attached to the conventional camera. In this paper, we present an implementation of depth estimation with a single image using a graphics processing unit (GPU) in a desktop PC, and achieve real-time application via our evolutional algorithm and parallel processing technique, employing a compute shader. The methods greatly accelerate the compute-intensive implementation of depth estimation with a single view image from 0.003 frames per second (fps) (implemented in MATLAB) to 53 fps, which is almost twice the real-time standard of 30 fps. In the previous literature, to the best of our knowledge, no paper discusses the optimization of depth estimation using a single image, and the frame rate of our final result is better than that of previous studies using multiple images, whose frame rate is about 20fps.
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Caponization Effects on Growth Performance and Lipid Metabolism in Taiwan Country Chicken Cockerels
Chen, Kuo-Lung,Hsieh, Tseng-Yueh,Chiou, Peter Wen-Shyg Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.3
This trial was designed to study the caponization effects on the appearance, carcass characteristics, blood constituents and lipid metabolism of Taiwan country chicken cockerels. Cockerels were caponized at 8 weeks of age. Sixteen-week-old chickens, including 10 capons, 5 slips (incomplete caponized male chickens) and 20 normal chickens of equal sexes were selected for a 10 week ad libitum feeding trial. Results showed that the testosterone concentrations in the capons and females were lower (p<0.05) than that of intact males. The comb length, height and weights were also lower (p<0.05). The weight of the slips was between that of the capons and intact males, but was heavier (p<0.05) than that of the capon. The live-weight, carcass weight and shank perimeter in the capons were higher than those of the other groups (p<0.05). Hepatic lipogenic enzyme activity analyses showed that NADP-malic dehydrogenase (MDH) activity in the capons and female chickens was higher than that in intact male chickens (p<0.05). The MDH activity in the slips was between that for the capon and intact male chickens (p>0.05). The abdominal fat weight and relative abdominal fat weight of the capons and females were heavier than that for intact males (p<0.05); the slips were between the capons and intact males. The blood lipid content results showed that the triacylglycerol and cholesterol in the capons were higher than that for intact males (p<0.05). However, the percentage of low-density lipoprotein (LDL) was lower than that in intact male chickens (p<0.05). It appears that the increase in lipid accumulation in caponized male chickens is attributed mainly to an increase in MDH activity and the changes in lipid transportation in the capons.
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Ting-Yu Chao,Cheng-Chu Hsieh,Shih-Min Hsu,Cho-Hua Wan,Guan-Ting Lian,Yi-Han Tseng,Yueh-Hsiung Kuo,Shu-Chen Hsieh 한국식품영양과학회 2021 Preventive Nutrition and Food Science Vol.26 No.1
Hepatic ischemia/reperfusion (IR) injury is a complication that occurs during liver surgery, whereby hepatic tissue is injured by oxygen deficiency during ischemia, then further damaged by a cascade of inflammatory and oxidative insults when blood is resupplied during reperfusion. Antrodia camphorata is an indigenous fungus in Taiwan and an esteemed Chinese herbal medicine with various bioactivities. This study examined the effect of ergostatrien-3β-ol (EK100), an active compound found in both the fruiting body and mycelia of A. camphorata, on IR injury pathologies in rats and cell models of oxidative and inflammatory stress. Male Sprague-Dawley rats were randomly assigned to receive a vehicle or 5 mg/kg EK100 prior to hepatic IR injury induced by 1 h ischemia followed by 24 h reperfusion, or a sham operation. RAW 264.7 murine macrophages and HepG2 hepatocytes were pretreated with EK100, then inflammation was induced with lipopolysaccharides in the former and oxidative stress was induced with hydrogen peroxide in the latter. EK100 decreased IR-induced elevation in serum levels of alanine aminotransferase and aspartate aminotransferase and lowered levels of the inflammatory cytokines tumor necrosis factor-α, interleukin (IL)-6, and IL-1β. In addition, EK100 significantly reduced hepatic mRNA levels of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2, as well as nitrite production and iNOS gene expression in both hepatocyte and macrophage cell lines. We demonstrated that EK100 exhibits potent protection against hepatic IR injury, which may be used to design strategies to ameliorate liver damage during liver surgery.
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