An Efficient Probability-based t out of n Secret Image Sharing Scheme

Chi-Chen Chang,Yu-Zheng Wang,Chi-Shiang Chan 보안공학연구지원센터(IJSIP) 2009 International Journal of Signal Processing, Image Vol.2 No.1

Role-Balance Based Multi-Secret Images Sharing using Boolean Operations

( Chi-shiang Chan ),( Yung-chen Chou ),( Yi-hui Chen ),( Yuan-yu Tsai ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.5

In 2011, Chen and Wu proposed their method of sharing n secret images to n+1 shadow images through the concept of a Boolean-based Visual Secret Sharing (VSS) method. However, the shadow images produced by this method are not equally important. If the participant who owns an important shadow image does not want to cooperate with other participants, most secret images can not be reconstructed. In the proposed method, the relationship between the shadows images and secret images are designed in a circular way mostly. Each shadow image only relates to two secret images. This means that if one participant refuses to cooperate with other participants, there are only two secret images which can not be reconstructed. Moreover, our proposed method only needs to produce n shadow images and n secret images can be shared to them.

Probability-based Tamper Detection Scheme for BTC-compressed Images Based on Quantization Levels Modification

Yu-Chen Hu,Chun-Chi Lo,Chang-Ming Wu,Wu-Lin Chen,Chia-Hsien Wen 보안공학연구지원센터 2013 International Journal of Security and Its Applicat Vol.7 No.3

Using the Juice of Water Lettuce (Pistia stratiotes) as Culture Medium to Increase the Cell Density and the Production of Microbial Lipid

Yu-Hsien Lien,Fu-Yao Liu,Jyy-Ning Chen,Yu-Shan Huang,Yu-Hong Wei,Chiyang Yu,Che-Chi Shu 한국생물공학회 2019 Biotechnology and Bioprocess Engineering Vol.24 No.2

Water lettuce (Pistia stratiotes) is one of the most well-known aquatic weeds as it causes problems in watercourses all over the world. This invasive species is fast-growing and thus has the potential for its use in preparing growth medium of microorganisms. Toward it, the pretreatment and enzymatic saccharification are positively the decisive processes. But there are other crucial processes, which are usually ignored by researchers. To the best of my knowledge, this presented work is the first time discovering that the juice obtained from water lettuce is valuable. Except for sterilization, no treatment is needed for the water lettuce’s juice and it can be directly served for cell growth. For Escherichia coli, Saccharomyces cerevisiae, Pichia pastoris, Bacillus subtilis, Lactococcus Lactis, Lactobacillus rhamnosus, and Lactobacillus plantarum, the cell density in the broth of water lettuce’s juice as the only carbon source is 10-60% higher than that in LB, YPD, BHI, M17, MRS. We then examined the production of microbial lipid by YM prepared in the juice of water lettuce. In comparison to commercial medium YM broth, the YM with juice caused 84% increase in the production of microbial lipid. A simple process of collecting juice notably increased productivity.

Effect of crosslinking agents on the dispersive behaviour of polymer particles in seed swelling polymerisation

Yu-Chen Kao,Wha-Tzong Whang,Yi-Chun Chen,Kai-Chi Chen 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.51 No.-

This study focused on the effect of crosslinker structure between PMMA on the dispersity of crosslinkedparticles in seed swelling polymerisation. We usedfive different crosslinking agents in an assessment ofthe dispersity of crosslinking monodisperse particles using PMMA seed particles in seed swellingpolymerisation. These results show that the structure of the crosslinking agent affects the dispersityduring the swelling stage. According to the solubility parameter theory of computation, the departure ofsimilar solubility parameter causes the swollen particles to segregate into more dispersity.

Male Infertility Increases the Risk of Cardiovascular Diseases: A Nationwide Population-Based Cohort Study in Taiwan

Chen Peng-Ciao,Chen Yu-Ju,Yang Chia-Chen,Lin Ting-Ti,Huang Chien-Chu,Chung Chi-Hsiang,Sun Chien-An,Chien Wu-Chien 대한남성과학회 2022 The World Journal of Men's Health Vol.40 No.3

Purpose: Some evidence suggests that male infertility increases the risk of cardiovascular diseases (CVDs). However, the evidence in Asian populations is relatively scarce. The aim of this study is to determine whether male infertility increases the risk of CVDs. Materials and Methods: We used inpatient and outpatient data for the years 2000 to 2015 from the Taiwanese Longitudinal Health Insurance Database. We enrolled 7,016 males over 18 years old and diagnosed with male infertility. Of these, 2,326 matched our inclusion criteria and were assigned to the study group. For each infertility patient, four comparison patients were frequency-matched by age and index date to form a control cohort comprising 9,304 patients. Cox proportional hazards analysis was used to estimate the association between male infertility and CVDs. Results: After a 15-year follow-up, the incidence rate of CVDs was higher in the infertility group than the control group (1,460.23 and 1,073.70 per 100,000 person-years, respectively). The Cox proportional hazards regression analysis revealed that the adjusted HR for CVDs was 1.472 for the infertility group (95% CI, 1.288–1.683; p<0.001) relative to the control group. The Kaplan–Meier analysis of the cumulative incidence of CVDs in the two groups showed that the cumulative risk curve for CVDs was significantly higher for the infertility group than the control group. Conclusions: This study shows that men with infertility have a higher risk of developing incident CVDs. In the future, healthcare providers should pay attention to these patients because of their higher health risks.

Sofosbuvir/velpatasvir plus ribavirin for Child-Pugh B and Child-Pugh C hepatitis C virus-related cirrhosis

( Chen-hua Liu ),( Chi-yi Chen ),( Wei-wen Su ),( Chun-jen Liu ),( Ching-chu Lo ),( Ke-jhang Huang ),( Jyh-jou Chen ),( Kuo-chih Tseng ),( Chi-yang Chang ),( Cheng-yuan Peng ),( Yu-lueng Shih ),( Chia 대한간학회 2021 Clinical and Molecular Hepatology(대한간학회지) Vol.27 No.4

Background/Aims: Real-world studies assessing the effectiveness and safety of sofosbuvir/velpatasvir (SOF/VEL) plus ribavirin (RBV) for Child-Pugh B/C hepatitis C virus (HCV)-related cirrhosis are limited. Methods: We included 107 patients with Child-Pugh B/C HCV-related cirrhosis receiving SOF/VEL plus RBV for 12 weeks in Taiwan. The sustained virologic response rates at off-treatment week 12 (SVR₁₂) for the evaluable population (EP), modified EP, and per-protocol population (PP) were assessed. The safety profiles were reported. Results: The SVR₁₂ rates in the EP, modified EP and PP were 89.7% (95% confidence interval [CI], 82.5-94.2%), 94.1% (95% CI, 87.8-97.3%), and 100% (95% CI, 96.2-100%). Number of patients who failed to achieve SVR₁₂ were attributed to virologic failures. The SVR₁₂ rates were comparable regardless of patient characteristics. One patient discontinued treatment because of adverse events (AEs). Twenty-four patients had serious AEs and six died, but none were related to SOF/VEL or RBV. Among the 96 patients achieving SVR₁₂, 84.4% and 64.6% had improved Child-Pugh and model for endstage liver disease (MELD) scores. Multivariate analysis revealed that a baseline MELD score ≥15 was associated with an improved MELD score of ≥3 (odds ratio, 4.13; 95% CI, 1.16-14.71; P=0.02). Patients with chronic kidney disease (CKD) stage 1 had more significant estimated glomerular filtration rate declines than patients with CKD stage 2 (-0.42 mL/min/1.73 ㎡/month; P=0.01) or stage 3 (-0.56 mL/min/1.73 ㎡/month; P<0.001). Conclusions: SOF/VEL plus RBV for 12 weeks is efficacious and well-tolerated for Child-Pugh B/C HCV-related cirrhosis. (Clin Mol Hepatol 2021;27:575-588)

An Automatic Environmental Monitoring and Cooling System to Reduce Heat Stress in Dairy Cows

( Yu-chi Tsai ),( Chen-yu Cheng ),( Jih-tay Hsu ),( Shih-torng Dnig ),( Ta-te Lin ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

In tropical and subtropical regions with high temperature and humidity conditions, one of the problems in dairy farm management is the effect of heat stress on animal productivity. Due to this problem, the utilization of an automatic environmental monitoring system for cooling, labor-saving and heat stress reduction is necessary. In this study, an environmental monitoring and automatic cooling system based on an embedded system for dairy farms was designed. The system aims to regulate the environmental condition by means of direct feedback depending on the monitoring of heat stress index (HSI) augmented by dairy cow drinking behavior. The system is composed of two sub-systems: data acquisition and environmental control. The data acquisition module collects images, temperature and humidity data. The cooling system is controlled based on the real-time environmental data, and the historical data are recorded and uploaded to the server for display and analysis. The data are analyzed on the environmental monitoring panel on the farm and on the website, which can be remotely accessed. The control parameters are adjusted using the image results from the dairy cow drinking behavior with a fixed time interval. The results of the conducted experiments show that there is labor saving improvement and an increment in milk production compared to the same period in the previous year when the system was not installed. The automatic environmental monitoring cooling system exhibits high efficiency and can perform real-time control and self-adjustment. The system can be used for fully automated dairy cow system application, as well as dairy cow behavior analysis through both environmental and image information.

Influence of Degree of Hydrolysis on Functional Properties, Antioxidant and ACE Inhibitory Activities of Egg White Protein Hydrolysate

Chen Chen,Yu-Jie Chi,Ming-Yang Zhao,Wei Xu 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.1

Functional properties, antioxidant, and angiotensin-I converting enzyme (ACE) inhibitory activities of egg white protein hydrolysate (EWPH) prepared with trypsin at different degree of hydrolysis (DH) were investigated. The DPPH radical scavenging activity, reducing power, lipid peroxidation inhibitory activity, and ACE inhibitory activity increased with DH at first and then decreased gradually. Hydrolysates with 12.4% DH had the highest antioxidant and ACE inhibitory activities. As DH increased, the solubility of EWPH increased while the emulsifying and foaming properties decreased. The functional properties of EWPH were also controlled by pH. Ultrafiltration of the hydrolysate with 12.4% DH revealed that the fractions of molecular weight lower than 3 kDa exhibited the highest antioxidant and ACE inhibitory activities. The results indicated that EWPH with different DH have different bioactive and functional properties and EWPH by controlled hydrolysis may be useful ingredients in food and nutraceutical applications with potential bioactive properties.

Determination of the quality of stripe-marked and cracked eggs during storage

Yu Chi Liu,Ter Hsin Chen,Ying Chen Wu,Fa Jui Tan 아세아·태평양축산학회 2017 Animal Bioscience Vol.30 No.7

Objective: Stripe marks, which occasionally occur on the shell, do not cause breakage to the shell and shell membranes of eggs. This study investigated the quality of intact eggs (IEs), minor stripe-marked eggs (MEs), severe stripe-marked eggs (SEs), and cracked eggs (CEs) during 3-week storage at 25°C. Methods: Shell eggs were collected the day after being laid and were washed. Among them, eggs without any visual cracks or stripe marks on the shells were evaluated as IEs by the plant employees using candling in a darkened egg storage room; the remaining eggs exhibited some eggshell defects. At day 3, the eggs were further categorized into IEs, MEs, SEs, CEs, and broken eggs (BEs) on the basis of the description given. Except BEs, which were discarded, the remaining eggs were stored at 25°C (approximate relative humidity 50%) and then analyzed. Results: Stripe marks were observed primarily within the first 3 days after washing. At day 3, CEs had significantly (p<0.05) lower Haugh unit values, but all eggs had grades AA or A, according to the United States Department of Agriculture standard. As storage time increased, differences in egg quality between groups were more obvious. IEs had the highest eggshell breaking strength. During storage, the total plate counts and pathogens, namely Escherichia coli, Campylobacter spp., Staphylococcus aureus, and Salmonella spp., were not detectable in the internal content of IEs and SEs. Conclusion: In conclusion, cracks degraded egg quality severely and minor stripe marks only slightly influenced the egg quality.