Study of Data Placement Schemes for SNS Services in Cloud Environment

( Yen-wen Chen ),( Meng-hsien Lin ),( Min-yan Wu ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.8

Due to the high growth of SNS population, service scalability is one of the critical issues to be addressed. The cloud environment provides the flexible computing and storage resources for services deployment, which fits the characteristics of scalable SNS deployment. However, if the SNS related information is not properly placed, it will cause unbalance load and heavy transmission cost on the storage virtual machine (VM) and cloud data center (CDC) network. In this paper, we characterize the SNS into a graph model based on the users` associations and interest correlations. The node weight represents the degree of associations, which can be indexed by the number of friends or data sources, and the link weight denotes the correlation between users/data sources. Then, based on the SNS graph, the two-step algorithm is proposed in this paper to determine the placement of SNS related data among VMs. Two k-means based clustering schemes are proposed to allocate social data in proper VM and physical servers for pre-configured VM and dynamic VM environment, respectively. The experimental example was conducted and to illustrate and compare the performance of the proposed schemes.

Modified EDCF to Improve the Performance of IEEE 802.11 e Contention-based Channel Access

Wen-Yen Lin,Jung-Shyr Wu 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7

In this paper we propose a modified EDCF scheme, M-EDCF, to improve the Quality of Service (QoS) of the IEEE 802.11e wireless network. The IEEE 802.11e standard is presented to support QoS at medium access control level using a priority scheme by differentiating the inter-frame space and the initial window size. In addition to providing relative priorities by adjusting the size of the Contention Window (CW) of each traffic class, our proposed scheme, M-EDCF, also consider the effect of a back_off_timer to avoid unnecessary collisions. Our study shows that in either in heavy or light traffic load our proposed scheme can provide better quality for both high priority and low priority packets than either the AEDCF [1][14].

A meta-analysis of genome-wide association studies for adiponectin levels in East Asians identifies a novel locus near <i>WDR11-FGFR2</i>

Wu, Ying,Gao, He,Li, Huaixing,Tabara, Yasuharu,Nakatochi, Masahiro,Chiu, Yen-Feng,Park, Eun Jung,Wen, Wanqing,Adair, Linda S.,Borja, Judith B.,Cai, Qiuyin,Chang, Yi-Cheng,Chen, Peng,Croteau-Chonka, Da Oxford University Press 2014 Human Molecular Genetics Vol.23 No.4

<P>Blood levels of adiponectin, an adipocyte-secreted protein correlated with metabolic and cardiovascular risks, are highly heritable. Genome-wide association (GWA) studies for adiponectin levels have identified 14 loci harboring variants associated with blood levels of adiponectin. To identify novel adiponectin-associated loci, particularly those of importance in East Asians, we conducted a meta-analysis of GWA studies for adiponectin in 7827 individuals, followed by two stages of replications in 4298 and 5954 additional individuals. We identified a novel adiponectin-associated locus on chromosome 10 near <I>WDR11-FGFR2</I> (<I>P</I> = 3.0 × 10<SUP>−14</SUP>) and provided suggestive evidence for a locus on chromosome 12 near <I>OR8S1-LALBA</I> (<I>P</I> = 1.2 × 10<SUP>−7</SUP>). Of the adiponectin-associated loci previously described, we confirmed the association at <I>CDH13</I> (<I>P</I> = 6.8 × 10<SUP>−165</SUP>), <I>ADIPOQ</I> (<I>P</I> = 1.8 × 10<SUP>−22</SUP>), <I>PEPD</I> (<I>P</I> = 3.6 × 10<SUP>−12</SUP>), <I>CMIP</I> (<I>P</I> = 2.1 × 10<SUP>−10</SUP>), <I>ZNF664</I> (<I>P</I> = 2.3 × 10<SUP>−7</SUP>) and <I>GPR109A</I> (<I>P</I> = 7.4 × 10<SUP>−6</SUP>). Conditional analysis at <I>ADIPOQ</I> revealed a second signal with suggestive evidence of association only after conditioning on the lead SNP (<I>P</I><SUB>initial</SUB> = 0.020; <I>P</I><SUB>conditional</SUB> = 7.0 × 10<SUP>−7</SUP>). We further confirmed the independence of two pairs of closely located loci (<2 Mb) on chromosome 16 at <I>CMIP</I> and <I>CDH13</I>, and on chromosome 12 at <I>GPR109A</I> and <I>ZNF664</I>. In addition, the newly identified signal near <I>WDR11-FGFR2</I> exhibited evidence of association with triglycerides (<I>P</I> = 3.3 × 10<SUP>−4</SUP>), high density lipoprotein cholesterol (HDL-C, <I>P</I> = 4.9 × 10<SUP>−4</SUP>) and body mass index (BMI)-adjusted waist–hip ratio (<I>P</I> = 9.8 × 10<SUP>−3</SUP>). These findings improve our knowledge of the genetic basis of adiponectin variation, demonstrate the shared allelic architecture for adiponectin with lipids and central obesity and motivate further studies of underlying mechanisms.</P>

Local Structure Distortion in LiCu₂O₂ Single Crystal at Low Temperature

Tzu-Wen Huang,Kuo-Wei Yeh,Kuan-Li Yu,Yen-Fa Liao,Maw-Kuen Wu 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

A Study on Improve Share Image of Visual Cryptography

Chao-Ming Wu,Wen-Jan Chen,Yu-Yen Shen 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7

The visual cryptography is a method of encrypt secret image in to two or several share images and use the mankind's visual scheme to decipher. The sizes of the two share images produced by our method will be different. So, the transmission bandwidth and storage space needed are less than the traditional visual cryptography system. In addition the security of the data is increased.

Clinical Features of Patients with Esophageal and Second Primary Cancers

Tsai, Huang-Wen,Chang, Chih-Chun,Sun, Jen-Tang,Liou, Ching-Biau,Lin, Hsiu-Chen,Lin, I-Hsin,Yu, Yun-Chieh,Weng, Wei-Ling,Leong, Ka-I,Yen, Tzung-Hai,Wu, Jiann-Ming Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.22

Background: The prevalence of esophageal cancer (EC) with second primary cancers (SPC) is increasing worldwide. This study was aimed to understand the clinical features of EC patients with SPC in the Taiwanese population. Materials and Methods: Clinical and laboratory data for 180 EC patients with or without SPC were collected between January 2009 and December 2013. Information on treatment approaches, location of SPCs and ABO blood type were also collected and stratified. Results: The most common SPC in EC patients was hypopharyngeal cancer, followed by laryngeal cancer and hepatocellular carcinoma in our study. Malignancies of colon, prostate and lung were also found. There was a significant higher portion of blood type A in the EC patients with SPC compared with those without (42.4% vs 19.5%, P=0.006). Conclusions: The frequency and SPC site distribution and blood type A should be considered in clinical evaluation of EC patients with a high risk of developing SPC in the Taiwanese population.

Green Tea Powder Improves Probiotic Viability In Functional Yogurt and Provide Added Physicochemical Benefits

( Ching Han Chang ),( Yen Shiang Chen ),( Wen Fu Wu ),( Ying Chen Lu ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

The purpose of this study is to investigate the effect of green tea (Camellia sinensis) powders on fermentation and survival of probiotic yogurt. Green tea powders were added to milk, sterilized, fermented with Lactobacillus reuteri LYC184 and stored at 4°C for 14 days. The quality parameters of green tea powder yogurt (TP) included bacterial number, pH, titratable acidity, color and physicochemical properties were analyzed. Results showed that the adhesiveness and pH value decrease as the storage time increases; the value of titratable acidity, viscosity and hardness are proportional to the storage time. The phenolic compounds in green tea yogurts were analyzed by HPLC. The novel yogurts showed significantly higher probiotic cell viabilities during storage at 4°C. In conclusion, adding the green tea powders to Lactobacillus reuteri LYC184 fermented yogurt is an excellent functional food that has great potential for the beneficial properties of human health.

Suture Repair in Endoscopic Surgery for Craniovertebral Junction

Mei-Yin Yeh,Wen-Cheng Huang,Jau-Ching Wu,Chao-Hung Kuo,Hsuan-Kan Chang,Tsung-Hsi Tu,Peng-Yuan Chang,Yu-Shu Yen,Henrich Cheng 대한척추신경외과학회 2019 Neurospine Vol.16 No.2

Objective: Endoscopic approaches to the craniovertebral junction (CVJ) have been established as viable and effective surgical treatments in the past decade. One of the major complications is leakage of the cerebrospinal fluid (CSF). This study aimed to investigate the efficacy and feasibility of suture closure at the nasopharyngeal mucosa upon durotomy. Methods: A series of consecutive patients who underwent different endoscopic approaches to the CVJ were retrospectively reviewed. The pathologies, surgical corridors, neurological and functional outcomes, radiological evaluations, and complications were analyzed. Different strategies of repair for the intraoperative CSF leakage were described and compared. Results: A total of 22 patients covering 13 years were analyzed. There were 12, 2, and 8 patients who underwent transnasal, transoral, and combined approaches, respectively. There were 8 patients (36.4%) who experienced intraoperative CSF leakage, and were grouped into 2: 4 in the nonsuture (NS) group and 4 in the suture-repaired (SR) group. The NS group had 3 (75%) persistent CSF leakages postoperation that caused 1 mortality, whereas patients of the SR group had only 1 minor CSF rhinorrhea that healed spontaneously within days. Conclusion: In this series of 22 patients who required anterior endoscopic resection of pathologies at the CVJ, there was 1 (4.5%) serious complication related to CSF leakage. For patients who had no durotomy, the mucosal incision at the nasopharynx usually healed rapidly and there were few procedure-related complications. For patients with intraoperative CSF leakage, suture closure was technically challenging but could significantly lower the risks of postoperative complications.

Optimization of Composite MIM Feedstock Rheological Behaviour by Experimental Analysis

Chen Chih-Cherng,Wu Chi-Wen,Yen Chih-Ming 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1

The kneading process and formulations of feedstock obviously affect the quality of MIM products. In the present work, the rheological behaviour of the composite MIM feedstock, metal matrix (Cu) with few additions of ceramic powders (Al2O3), was measured by a self-designed/manufactured simple capillary rheometer. Experimental results show that the distribution between powders and binder is more uniformly when blending time increased. Though high powder loading will increase the feedstock viscosity, the fluidity reveals relatively stable through the load curves of extrusion. Besides, the temperature-dependence of viscosity of the feedstock approximately follows an Arrehnius equation. Basing on Taguchi’s method, the kneading optimization conditions and the rheological model of the feedstock were established, respectively.

QOS GUARANTEE FOR WIRELESS LAN WITH FAIRNESS TRANSMISSION

Bor-Jiunn Hwang,Wen-Yen Lin,Jung-Shyr Wu 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7

Recently, there has been considerable research interest in providing services related to multimedia over IP (MoIP) in wireless networks. For example, IEEE 802.11e develops Enhanced Distributed Coordination Access (EDCA) and Hybrid Coordination Function (HCF) controlled channel access (HCCA), to enhance the Quality of Service (QoS) of the original MAC mechanism. However, the priority-based access mechanism can not guarantee QoS requirements in terms of delay and throughput since it is contention-based. In this paper, we propose several schemes that regulate backoff contention window adaptively to achieve more fairness between ACs. The simulation results present the constraint due to agreement level. Moreover, it is demonstrated that the proposed schemes can assign transmission opportunity more fairly than EDCA. Also the proposed schemes really have a performance improvement.