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Search Results: 1 - 10 of 5010 matches for " HeeSun Jung "
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Some Properties of Orthogonal Polynomials for Laguerre-Type Weights
HeeSun Jung,Ryozi Sakai
Journal of Inequalities and Applications , 2011, DOI: 10.1155/2011/372874
Abstract:
Derivatives of Integrating Functions for Orthonormal Polynomials with Exponential-Type Weights
Jung HeeSun,Sakai Ryozi
Journal of Inequalities and Applications , 2009,
Abstract: Let , , where is an even function. In 2008 we have a relation of the orthonormal polynomial with respect to the weight ; , where and are some integrating functions for orthonormal polynomials . In this paper, we get estimates of the higher derivatives of and , which are important for estimates of the higher derivatives of .
Some Properties of Orthogonal Polynomials for Laguerre-Type Weights
Jung HeeSun,Sakai Ryozi
Journal of Inequalities and Applications , 2011,
Abstract: Let , let be a continuous, nonnegative, and increasing function, and let be the orthonormal polynomials with the weight . For the zeros of we estimate , where is a positive integer. Moreover, we investigate the various weighted -norms ( ) of .
International Comparative Case Study of High School Students about Empathy  [PDF]
Heesun Yang, Jung-Eun Park, Ji Hye Kim, Seong-Joo Kang
Psychology (PSYCH) , 2019, DOI: 10.4236/psych.2019.102013
Abstract: In this study, we attempted to investigate the empathy ability of Korean adolescents. Davis’ Interpersonal Reactivity Index was applied to 1155 high school students in Korea, and the results were compared with those obtained from the survey of the American and Dutch students with similar ages. As a result, high school students in Korea had higher cognitive empathy than other countries. But, in cognitive empathy, Fantasy (FN) was lower than Perspective Taking (PT), unlike other countries. The mean score of women in all empathy subscales was higher than that of men. And there is significant difference between humanities and natural science high school students in PT, Empathic Concern (EC) and Personal Distress (PD). However, in the comparison of mean score’s effect size and correlation in the subscales of the empathetic scale, it was confirmed as an unstable structure in PD. Therefore, there is a need to educationally discuss how to improve this limitation of measuring empathy in the further research.
Molecular Characterization of Listeria monocytogenes Based on the PFGE and RAPD in Korea  [PDF]
Sanghun Park, Jihun Jung, Sungsun Choi, Younghee Oh, Jibho Lee, Heesun Chae, Seunghee Ryu, Hyowon Jung, Gunyong Park, Sungmin Choi, Bogsoon Kim, Junghun Kim, Young Zoo Chae, Byungyeol Jung, Myunghun Lee, Hyunsoo Kim
Advances in Microbiology (AiM) , 2012, DOI: 10.4236/aim.2012.24079
Abstract:

This study was performed to characterize 35 L. monocytogenes isolates from animals, foods, environmental samples collected between 1997 and 2007 with no apparent epidemiological relations, and five reference isolates using serotypic, genotypic and molecular typing methods to understand the pattern of strain distribution in Korea. For this study, we used serotyping and detected 6 different virulence-associated genes (inlA, inlB, plcA, plcB, hlyA, and actA) and 16s rRNA using multiplex-PCR. We also compared RAPD and PFGE to determine genetic characterization of L. monocytogenes strains to define the genetic diversity. Serotype patterns of the 30 L. monocytogenes strains was as follows; 9 isolates (30.0%) belonged to serotype, 7 isolates (23.3%) belonged to serotype 4b, 4 isolates (13.3%) belonged to serotype 1/2b, 3 isolates (10.0%) belonged to serotype 1/2c, 2 (6.7%) isolates belonged to4c, 2 (6.7%) isolates belonged to NT (Non Type), one isolate (3.2%) belonged to3aand 3b, and4a, respectively. Although, a limited number of isolates were analyzed in this study, molecular typing with RAPD and PFGE indicated that PFGE is more discriminatory for the subtyping L. monocytogenes than RAPD. Some L. monocytogenes isolates by RAPD and PFGE types are associated with specific sources. And, combining data obtained by these methods will increases the likelihood of strain discrimination.

HDAC6 Inhibitor Blocks Amyloid Beta-Induced Impairment of Mitochondrial Transport in Hippocampal Neurons
Chaeyoung Kim, Heesun Choi, Eun Sun Jung, Wonik Lee, Soojung Oh, Noo Li Jeon, Inhee Mook-Jung
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0042983
Abstract: Even though the disruption of axonal transport is an important pathophysiological factor in neurodegenerative diseases including Alzheimer's disease (AD), the relationship between disruption of axonal transport and pathogenesis of AD is poorly understood. Considering that α-tubulin acetylation is an important factor in axonal transport and that Aβ impairs mitochondrial axonal transport, we manipulated the level of α-tubulin acetylation in hippocampal neurons with Aβ cultured in a microfluidic system and examined its effect on mitochondrial axonal transport. We found that inhibiting histone deacetylase 6 (HDAC6), which deacetylates α-tubulin, significantly restored the velocity and motility of the mitochondria in both anterograde and retrograde axonal transports, which would be otherwise compromised by Aβ. The inhibition of HDAC6 also recovered the length of the mitochondria that had been shortened by Aβ to a normal level. These results suggest that the inhibition of HDAC6 significantly rescues hippocampal neurons from Aβ-induced impairment of mitochondrial axonal transport as well as mitochondrial length. The results presented in this paper identify HDAC6 as an important regulator of mitochondrial transport as well as elongation and, thus, a potential target whose pharmacological inhibition contributes to improving mitochondrial dynamics in Aβ treated neurons.
Impact of Reference Gene Selection for Target Gene Normalization on Experimental Outcome Using Real-Time qRT-PCR in Adipocytes
Bradley S. Ferguson,Heesun Nam,Robin G. Hopkins,Ron F. Morrison
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0015208
Abstract: With the current rise in obesity-related morbidities, real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) has become a widely used method for assessment of genes expressed and regulated by adipocytes. In order to measure accurate changes in relative gene expression and monitor intersample variability, normalization to endogenous control genes that do not change in relative expression is commonly used with qRT-PCR determinations. However, historical evidence has clearly demonstrated that the expression profiles of traditional control genes (e.g., β-actin, GAPDH, α-tubulin) are differentially regulated across multiple tissue types and experimental conditions.
Investigations on Non-Condensation Gas of a Heat Pipe  [PDF]
Jung-Chang Wang
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.34043
Abstract: This paper utilizes numerical analysis method to determine the influence of non-condensation gas on the thermal performance of a heat pipe. The temperature difference between the evaporation and condensation sections of a single heat pipe and maximum heat capacity are the index of the thermal performance of a heat pipe for a thermal module manufacturer. The thermal performance of a heat pipe with lower temperature difference between the evaporation and condensation sections is better than that of higher temperature dif- ference at the same input power. The results show that the maximum heat capacity reaches the highest point, as the amount of the non-condensation gas of a heat pipe is the lowest value and the temperature difference between evaporation and condensation sections is the smallest one. The temperature difference is under 1?C while the percentage of the non-condensation gas is under 8 × 10?5%, and the heat pipe has the maximum heat capacity.
Investigation of Stresses on Tie Band Used to Wrap and Fasten Rolled Coils  [PDF]
Chongsun Lee, Ilsup Jung
Modern Mechanical Engineering (MME) , 2012, DOI: 10.4236/mme.2012.23011
Abstract: The research was motivated to establish a scientific basis for the required number of steel tie bands used in wrapping and fastening hot rolled coils produced in steel manufacture lines for safe delivery and storage. Strain gages were installed on the tie bands and stress was recorded during the banding and delivery procedure of rolls in the field. The stress developing in the bands due to fastening of the roll and that due to springback of the coil were clearly distinguishable from the strain gage signals. Twelve hot rolled coils having different yield strength, thickness, width, and weight were tested in the recoiling field. The results showed the average tensile stress developing in the bands due to the fastening of the roll to be 151.7 ± 53.8MPa, which corresponded to one fourth of the failure strength of the steel band in the buckle region. In addition to the stress caused by fastening, average tensile stress caused by springback of the rolled coils was estimated to be 33 MPa. It increased to 79 MPa when one of the tie bands was removed from the roll. Comparing the measured stress due to springback with the theoretical stress formula yielded a proportional constant value of 0.219, and a correlation coefficient of 0.914, which demonstrate the formula to be useful in predicting springback stress. The average safety factor of the tie band was found to be 3.26 and it decreased to 2.60 when one of the bands was removed from the roll. The safety factor of the band was found to decrease with increased coil thickness because the current factory standard on the number of bands does not significantly take into account of increase in the springback force with increased coil thickness.
Ballistic Behavior of Heracron®-Based Composites: Effect of the Number Multifilaments on High-Speed Projectiles  [PDF]
Jung Seop Lim
Modeling and Numerical Simulation of Material Science (MNSMS) , 2013, DOI: 10.4236/mnsms.2013.33011
Abstract: In this study, two Heracron? woven fabrics, HT840-1 and HT840-2, were fabricated with different multifilament fibers, and their resistance to ballistic impact was investigated. For the same weight and number of plies, the HT840-2 fabric showed improved ballistic properties, compared with HT840-1; this result is contrary to the fiber and fabric properties. With the exception of the yarn’s physical properties, this behavior can be explained in terms of the number of multifilaments, which strongly influenced the ballistic mechanism, i.e., a greater number of multifilament fibers facilitates energy dissipation from a high-speed ballistic projectile. In summary, establishing this optimal number of multifilaments is the key to optimizing the ballistic properties of any given fabric.
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