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Chen X.,East China University of Science and Technology | Li Y.,East China University of Science and Technology | Zeng J.,CAS Shanghai Institute of Ceramics | Zheng L.,CAS Shanghai Institute of Ceramics | And 2 more authors.
Journal of the American Ceramic Society | Year: 2016

Large piezoelectric effect is achieved in Li-doped Ba0.85Ca0.15Ti0.90Zr0.10O3(BCTZ) ceramics by use of tuning the phase boundaries. Rhombohedral-orthorhombic (R-O) and orthorhombic-tetragonal (O-T) multiphase coexistence is constructed in the ceramics by changing Li contents. The high piezoelectric constant d33 (493 pC/N) and large electrostrain (dSmax/dEmax = 931 pm/V) have been observed in the Li-doped (Ba, Ca)(Ti, Zr)O3 ceramics at low sintering temperature (1350°C/2 h). The significant enhancement in materials properties is ascribed to the multiphase region around room temperature induced by Li-doped effect. © 2016 American Ceramic Society.


Lee K.C.,Pusan National University of Education | Cho J.,Jeju National University
Communications in Computer and Information Science | Year: 2012

As an advanced factor of OCB, causative variables (heterogenous, independent), such as the fairness of personnel management, the behavioral characteristics of an executive and the ethical management, are considered important in the organization management. With these having the executive trust and the organizational cynicism as a medium, the study focused on defining a relation of them, examining how they would work with the job attitude and the behaviors (organizational citizenship behavior, the job satisfaction and affective involvement), which are the causative variables (endogenous, subordinate). Through a comprehensive model, this study confirmed channels of variables which would affect the job attitude and behavior, which has led the study to suggest an empirical frame to clearly define causative variables, parameters and consequential variables. In other words, by having included general social welfare organization management-related variables, such as behavioral characteristics of an executive and ethical management, which have never been grafted onto the field of social welfare administration, the study came to have an academically significant meaning as a paper that has distributed itself to the establishment of general follow-up researches on social welfare organizations and social workers. © 2012 Springer-Verlag Berlin Heidelberg.


Lee Y.,Pusan National University of Education | Cho C.,Pusan National University | Woo G.,Pusan National University
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication, ICUIMC'12 | Year: 2012

Recently, the social media such as Digg and Slashdot reflect current social trends or major contemporary issues, on which users can publish articles and write comments. The users of such social media typically want to figure out the current issues on which many users are interested. Though these social media provide an abundance of various opinions, it is inconvenient for a user to take a casual glance at the current issues. In this paper, we propose a smart visualizing system IssueGalaxy that extracts current issues and visualizes with the related articles in a single screen shot. The IssueGalaxy consists of several suns, representing current major issues, with a set of planets around them, representing the related articles. Since the IssueGalaxy is presented in a single screen, it is helpful in figuring out the importance and the relations of the current issues of the target site. To test the usefulness of IssueGalaxy, we implemented a prototype and applied it on a set of articles published in an Internet forum site. According to this simple experiment, IssueGalaxy is revealed to helpful for understanding the relationships among the current issues. © 2012 ACM.


Lee E.S.,Inje University | Yoon Y.S.,Inje University | Park C.-Y.,Sungkyunkwan University | Kim H.-S.,Inje University | And 6 more authors.
Journal of Korean Medical Science | Year: 2010

It has been suggested that Helicobacter pylori eradication may influence production of some peptides in the stomach, which can affect appetite. This hypothesis is controversial. To verify the hypothesis, we conducted this randomized controlled trial using H. pylori infected subjects without any gastrointestinal symptoms. The treatment group received triple H. pylori eradication therapy for 7 days and the control group received no medication. We measured ghrelin, obestatin and the tumor necrosis factor-α (TNF-α) mRNA levels in endoscopic biopsy specimens and the changes from baseline to follow-up. The plasma active n-octanoyl ghrelin and obestatin levels were measured in both groups. The ghrelin/obestatin ratios in plasma and gastric mRNA expression were calculated at baseline and follow-up. Ghrelin mRNA expression in the fundic mucosa after H. pylori eradication increased significantly compared to the control group (4.47±2.14 vs. 1.79±0.96, P=0.009), independent of inflammatory changes. However, obestatin mRNA expression decreased in the antral mucosa (-0.57±1.06 vs. 0.41±0.72, P=0.028). The treatment group showed a marginal increase (P=0.060) in plasma ghrelin/obestatin ratio. The TNFα mRNA expression also decreased significantly with treatment. This randomized controlled trial demonstrates that H. pylori eradication increases ghrelin mRNA expression, independent of inflammatory cell changes. © 2010 The Korean Academy of Medical Sciences.


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