Institution
Chonbuk National University
Education•Jeonju, South Korea•
About: Chonbuk National University is a education organization based out in Jeonju, South Korea. It is known for research contribution in the topics: Apoptosis & Graphene. The organization has 14820 authors who have published 28884 publications receiving 554131 citations.
Topics: Apoptosis, Graphene, Nanofiber, Population, Electrospinning
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a dense pure WC hard material with a relative density of up to 97.6% was produced with simultaneous application of 60MPa pressure and electric current of 2800A within 2min.
Abstract: The rapid sintering of nano-structured WC hard materials in a short time is introduced with a focus on the manufacturing potential of this spark plasma sintering process. The advantage of this process allows very quick densification to near theoretical density and prohibition of grain growth in nano-structured materials. A dense pure WC hard material with a relative density of up to 97.6% was produced with simultaneous application of 60 MPa pressure and electric current of 2800 A within 2 min. A larger current caused a higher rate of temperature increase and therefore a higher densification rate of the WC powder. The finer the initial WC powder size the higher is the density and the better are the mechanical properties. The fracture toughness and hardness values obtained were 6.6 MPa m1/2 and 2480 kg/mm2, respectively under 60 MPa pressure and 2800 A using 0.4 μm WC powder.
146 citations
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Konkuk University1, Yonsei University2, Ajou University3, Hallym University4, Seoul National University Bundang Hospital5, Chonnam National University6, Kyungpook National University7, Chonbuk National University8, Pusan National University9, University of Ulsan10, Centers for Disease Control and Prevention11, Chung-Ang University12, Catholic University of Korea13, Seoul National University Hospital14
TL;DR: In this paper, the authors report the prevalence of spirometrically detected COPD in Korea in 2008, using data from the fourth Korean National Health and Nutrition Survey, using nationwide stratified random sampling.
Abstract: Background and objective: Because the mortality and social burden associated with COPD is increasing, repeated surveys of the prevalence of COPD have been used to assess risk factors, detect potential patients, and establish early diagnoses and management protocols. We report the prevalence of spirometrically detected COPD in Korea in 2008, using data from the fourth Korean National Health and Nutrition Survey.
Methods: Using nationwide stratified random sampling, based on the Korean Statistical Office census, 6840 subjects aged ≥19 years underwent spirometry, which was performed by four trained technicians, during 2008. The place of residence, levels of education and income and smoking status, as well as other results from a COPD survey questionnaire were also assessed.
Results: Airflow obstruction (FEV1/FVC < 0.7) was detected in 8.8% of subjects aged ≥19 years (11.6% of men and 5.9% of women) and COPD was detected in 13.4% of subjects aged ≥40 years (19.4% of men and 7.9% of women). Of the 6840 subjects, 27.3% were current smokers and 17.2% were former smokers, and the prevalence of COPD was higher in current and former smokers than in never smokers. Approximately 94% of patients with COPD had mild-to-moderate disease, without apparent symptoms; only 2.4% had been diagnosed by a physician and only 2.1% of patients had been treated. The independent risk factors for COPD were smoking, advanced age and male gender.
Conclusions: Although the prevalence of COPD in Korea is high, the disease is underdiagnosed and most COPD patients are under-treated.
146 citations
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TL;DR: In this paper, composite membranes of poly(vinylidene fluoride- co -hexafluoropropylene) {P(VdF-HFP)} and different composition of silica have been prepared by electrospinning polymer solution containing in situ generated silica.
146 citations
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TL;DR: The first measurement of elliptic and triangular flow in high-multiplicity (3)He+Au collisions at √(s(NN))=200 GeV is presented, indicating the formation of low-viscosity quark-gluon plasma even in these small collision systems.
Abstract: We present the first measurement of elliptic ($v_2$) and triangular ($v_3$) flow in high-multiplicity $^{3}$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. Two-particle correlations, where the particles have a large separation in pseudorapidity, are compared in $^{3}$He$+$Au and in $p$$+$$p$ collisions and indicate that collective effects dominate the second and third Fourier components for the correlations observed in the $^{3}$He$+$Au system. The collective behavior is quantified in terms of elliptic $v_2$ and triangular $v_3$ anisotropy coefficients measured with respect to their corresponding event planes. The $v_2$ values are comparable to those previously measured in $d$$+$Au collisions at the same nucleon-nucleon center-of-mass energy. Comparison with various theoretical predictions are made, including to models where the hot spots created by the impact of the three $^{3}$He nucleons on the Au nucleus expand hydrodynamically to generate the triangular flow. The agreement of these models with data may indicate the formation of low-viscosity quark-gluon plasma even in these small collision systems.
146 citations
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TL;DR: It is demonstrated that the surface topography plays an important role for phenotypic expression of the MG63 osteoblast-like cells as micropore size gets larger, cell number is reduced and cell differentiation and matrix production is increased.
146 citations
Authors
Showing all 14943 results
Name | H-index | Papers | Citations |
---|---|---|---|
Hyun-Chul Kim | 176 | 4076 | 183227 |
Andrew Ivanov | 142 | 1812 | 97390 |
Dong-Chul Son | 138 | 1370 | 98686 |
C. Haber | 135 | 1507 | 98014 |
Tae Jeong Kim | 132 | 1420 | 93959 |
Alessandro Cerri | 129 | 1244 | 103225 |
Paul M. Vanhoutte | 127 | 868 | 62177 |
Jason Nielsen | 125 | 893 | 72688 |
Chi Lin | 125 | 1313 | 102710 |
Paul Lujan | 123 | 1255 | 76799 |
Young Hee Lee | 122 | 1168 | 61107 |
Min Suk Kim | 119 | 975 | 66214 |
Alexandre Sakharov | 119 | 582 | 56771 |
Yang-Kook Sun | 117 | 781 | 58912 |
Rui L. Reis | 115 | 1608 | 63223 |