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( Sung Min Park ),( Qing Miao ),( Min Young Kim ) 한국행정학회 2013 한국행정학회 학술발표논문집 Vol.2013 No.-
This research paper uses the social capital perspective to revisit the much-discussed and as yet intriguing research question: the role of leadership behaviors in generating positive organizational attitudes and behaviors within the Asian context. The main purpose of this study is threefold: (1) to verify whether three leadership styles (i.e., servant leadership, ethical leadership, and participative leadership) contribute to enhancing organizational trust and commitment, (2) to test the full and partial mediating roles of organizational trust and commitment in the relationship between the three leadership predictors and organizational outcomes (i.e., in-role performance and managerial accountability), and (3) to probe indirect leadership impacts on performance and accountability outcomes. Using the alumni database (for 10 years, from 2001 to 2010) of the department of public administration at Zhejiang University, we constructed a survey (2011) (all items are selfreported: first round: 362 participants; second round: 300 participants; third round: 252 participants; valid sample size: 239 participants) that measured public employees` perceptions and behaviors in public organizations such as regarding leadership, commitment, HR policies, perceived organizational state, OCB, job tension, and trust. We employed exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) to operationalize the variables and confirm the latent constructs from the relevant survey questions. Second, to confirm the total direct and indirect effects, we employed a full structural equation model (SEM) (i.e., a measurement model with a path model) to test the interrelationships among variables and to assess the relative strength of each variable. The results of this study are interesting as they show that ethical and participative leadership behaviors are positively and significantly associated with organizational trust and commitment in the Chinese public sector. Based on a discussion of the main findings, various research and practical implications for public management theory and practice are provided.
Miao, Chengxia,Li, Xiao-Xi,Lee, Yong-Min,Xia, Chungu,Wang, Yong,Nam, Wonwoo,Sun, Wei Royal Society of Chemistry 2017 Chemical science Vol.8 No.11
<▼1><P>The highly efficient catalytic oxidation and oxidative kinetic resolution of secondary alcohols has been achieved using mononuclear Mn(<SMALL>II</SMALL>) catalysts and H<SUB>2</SUB>O<SUB>2</SUB>.</P></▼1><▼2><P>The highly efficient catalytic oxidation and oxidative kinetic resolution (OKR) of secondary alcohols has been achieved using a synthetic manganese catalyst with low loading and hydrogen peroxide as an environmentally benign oxidant in the presence of a small amount of sulfuric acid as an additive. The product yields were high (up to 93%) for alcohol oxidation and the enantioselectivity was excellent (>90% ee) for the OKR of secondary alcohols. Mechanistic studies revealed that alcohol oxidation occurs <I>via</I> hydrogen atom (H-atom) abstraction from an α-CH bond of the alcohol substrate and a two-electron process by an electrophilic Mn–oxo species. Density functional theory calculations revealed the difference in reaction energy barriers for H-atom abstraction from the α-CH bonds of <I>R</I>- and <I>S</I>-enantiomers by a chiral high-valent manganese–oxo complex, supporting the experimental result from the OKR of secondary alcohols.</P></▼2>
zhang miao ,Yao Wei,Osama Alfarraj,AMR TOLBA,Zhu Min 한국컴퓨터산업협회 2023 Human-centric Computing and Information Sciences Vol.13 No.-
Sensing data collection and energy replenishment are key issues of wireless rechargeable sensor network (WRSN). However, due to the limited battery capacity and cache size of mobile charging vehicle (MCV), using a single MCV to collect data and supplement energy for large-scale WRSNs is impossible. Therefore, we propose a joint mobile charging and data collection strategy of multiple MCVs for large-scale WRSNs. In this strategy, a periodic charging and data collection model is established to ensure that the nodes work permanently, and the sensing data are collected promptly by MCVs. We formulate the problem of reducing the time of charging and data collection of multiple MCVs and balancing the energy consumption of each MCV into a multi-objective optimization problem. To address the problem, a multi-objective Monkey King evolutionary (MOMKE) algorithm based on Pareto dominance is proposed. The influence of the parametric setting of the MOMKE is analyzed, while also verifying the feasibility of the algorithm. The experiment results indicate that MOMKE outperforms the three existing methods in terms of charging efficiency and data collection efficiency by 10% and 7%, respectively. Moreover, MOMKE is competitive in terms of the completion of the shortest moving path and maximum data collection delay.
Zhang Min,Jiang Yunyun,Cai Miao,Yang Zhennai 한국미생물·생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.6
Addition of probiotics to yogurt with desired health benefits is gaining increasing attention. To further understand the effect of probiotic Lactobacillus plantarum on the quality and function of fermented milk, probiotic fermented milk (PFM) made with probiotic L. plantarum K25 and yogurt starter (L. delbrueckii ssp. bulgaricus and Streptococcus thermophilus) was compared with the control fermented milk (FM) made with only the yogurt starter. The probiotic strain was shown to survive well with a viable count of 7.1 ± 0.1 log CFU/g in the PFM sample after 21 days of storage at 4oC. The strain was shown to promote formation of volatiles such as acetoin and 2,3-butanediol with milk fragrance, and it did not cause post-acidification during refrigerated storage. Metabolomics analysis by GC-MS datasets coupled with multivariate statistical analysis showed that addition of L. plantarum K25 increased formation of over 20 metabolites detected in fermented milk, among which γ-aminobutyric acid was the most prominent. Together with several other metabolites with relatively high levels in fermented milk such as glyceric acid, malic acid, succinic acid, glycine, alanine, ribose, and 1,3-dihydroxyacetone, they might play important roles in the probiotic function of L. plantarum K25. Further assay of the bioactivity of the PFM sample showed significant (p < 0.05) increase of ACE inhibitory activity from 22.3% at day 1 to 49.3% at day 21 of the refrigerated storage. Therefore, probiotic L. plantarum K25 could be explored for potential application in functional dairy products.
Yushan Ren,Miao Lin,Yuanqin Min,Xiao-Lian Zhang 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1
N-linked glycosylation of viral proteins have been implicated in shielding antigen epitopes and blocking neutralizing antibodies production and contribute to the evasion of HCV from the host immune response. In this study, the effects of N-linked glycosylation of Hepatitis C virus (HCV) envelope E1 and E2 proteins, the naturally poor immunogens, on the induction of specific immune response were examined. We constructed plasmids containing the genes encoding both wild type E1E2 proteins and mutated E1E2 proteins in which N-linked glycosylation sites are mutated individually or in combination by site-directed mutagenesis or coupled with CpG, a TLR9 ligand. The immunoreactivity of wild type E1E2 and mutated E1E2 proteins or coupled with immune activator CpG was analyzed in BALB/C mice using a DNA-based vaccination approach. We found that E1E2 specific N-glycosylated mutant induced much higher IgG titer than wild type (WT) E1E2. E1E2 mutant vaccinated mice developed a mixture of IgG1 and IgG2a, but CpG-E1E2 mutant and E1-E2 wild type dominantly developed IgG2a isotype. And CpG-E1E2 mutant significantly stimulated Th1-type response and specific CD8+T cells cytotoxic T lymphocytes (CTL) activities. More important we found that CpG-E1E2 mutant significantly induced much higher neutalizing antibody than E1-E2-WT and had the highest level of neutralizing antibodies among all groups. The monoclonal clonal antibody (McAb) were prepared from CpG-E1E2 mutant immunized mice and the main neutralizing McAb 1C2 had significantly neutralizing Ab activity with blocking HCVcc infection in Huh7.5.1 cells in vitro. Epitope mapping of binding of a neutralizing McAb 1C2 was also analyzed. Our data indicate that the presence of glycans at the surface of HCV envelope proteins could help explain how HCV evades the humoral immune response and why most HCV infections lead to chronicity. CpG have the ability to augment both neutralizing antibody and cellular responses of E1E2 mutant. The CpG-E1E2 mutant holds potential applicant for the development of therapeutic vaccine with enhanced cellular and neutralizing immune responses.
Jujie Ren,Miao Zhai,Min Cui,Liujia Li,Congcong Yu,Xudong Yu,Xueping Ji 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.1
A superoxide anion radical (O2 ˙-) nonenzymatic electrochemical sensor based on PtRuCu ternary alloy nanoparticles/electrochemically reduced graphene oxide (ERGO) composite modified glassy carbon electrode (PtRuCu/ERGO/GCE) was developed. ERGO and PtRuCu/ERGO composites were characterized by scanning electron microscopy. The prepared PtRuCu/ERGO/ GCE showed remarkable performance toward the electrocatalytic reduction of (O2 ˙-). The sensor possessed a high sensitivity of 1725µA · mM-1 · cm-2, a wide linear range of 7.5–330 µM (R2 = 0.993) and a low detection limit of 0.7 µM (S/N = 3), as well as excellent selectivity, reproducibility and stability, which can be attributed to the synergistic effect of ERGO and PtRuCu ternary alloy nanoparticles. Therefore, the prepared sensor is promising for electrochemical determination of O2˙-.
A 2G Sample 8 Bit CMOS CS DAC for HD Video
방묘(Pang Miao),정강민(Kang-Min Chung) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
This paper presents a 2G Sample 8 bit CMOS current steering Digital to Analog converter (CS-DAC) for HD video applications, which is based on a new type of transmission gate (TG) technique. A current cell matrix configuration and a parallel decoding circuit which allows low glitch energy. With TG circuits, the number of transistors and the delay time skew in the outputs of decoder are significantly reduced.