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신건호,이판응 단국대학교 경영경제연구소 1997 經營, 經濟硏究 Vol.1 No.-
Organization demands good communication for its effective operation. Furthermore, usually managers spend about 80% to 90% of their time for communication actions as means for managing individuals. For this reason it is quite clear how important communication is for effective decision-making prooess, establishing goals and effective implementation of management. Effective communication provides basis for human relationship within an orgdnization and stimulates mutual understanding within it. On the other hand unsatisfactory communication leads to piling up of discontents among members of the given organization and lack of cooperations stemming therefrom shall either delay the realization of the desired goals or lead to failure of its accomplishment. In light of such significance of communication for effective management of an organization this study analyzed characteristics of communications between different functional areas and ranks and the extent of impact by satisfaction factors in communcation on job satisfaction. From this analysis some useful ideas of effective communication have been found to incease job satisfaction as follows : Firstly, the satisfaction in communication had nothing to do with types of jobs. Secondly, depending on hierarchial order of the management there was difference in the degree of satisfaction in communication. Thirdly, the factors of satisfaction in communication showed comsiderable impact on the degree of job satisfaction. Finally, the impact of satisfaction in each communication on the extent of job satisfaction was very high.
1%Cr-Mo-V 강 회전자축의 크리이프 특성과 수명예측에 관한 연구
이치우,장윤석,정순호,조판근 慶南大學校 附設 工業技術硏究所 1986 硏究論文集 Vol.4 No.-
본 연구는 1%Cr-Mo-V강 회전자축의 보다 개선된 크리이프특성을 위한 최적열 처리 조건의 선정과 크리이프 수명을 예측하기 위하여 행해졌다. 실험결과 970℃∼980℃ 퀜칭/660℃∼680℃ 템퍼링의 조합에서 최적크리이프 특성치가 나타났다. 또한 Larson-Miller법 및 Curvelinear Regression법에 의해 1%Cr-Mo-V강 회전자축의 주파단곡선을 구하였다. 회전자축이 530℃에서 연속 작동되며 순수크리이프 변형만을 고려할 때 회전자축의 최고응력 집중부에서의 예상크리프수명은 21.9×105hrs이었다. This study was carried out to find out optimum heat treatment conditions for improved creep properties and to estimate creep life of 1% Cr-Mo-V-steel rotor shaft. The effect of heat treatment on the creep properties of 1% Cr-Mo-V-steel rotor shaft was investigated under the conditions of various heat treatment temperatures. Experimental result shows that the best combination of quenching and tempering temperatures for good creep properties is 970℃-980℃ quenching 660℃-680℃ tempering sequence. A master curve for 1% Cr-Mo-V-steel rotor shaft was obtained by Larson-Miller parameter and curvelinear regression method. Life prediction at the maximum stress concentration points in the rotor was computed about 21.9×10??hours, if the rotor shaft would be continuously operated at 530℃ and be influenced by the effect of creep strain only.
Biomarkers in pursuit of precision medicine for acute kidney injury: hard to get rid of customs
( Kun-mo Lin ),( Ching-chun Su ),( Jui-yi Chen ),( Szu-yu Pan ),( Min-hsiang Chuang ),( Cheng-jui Lin ),( Chih-jen Wu ),( Heng-chih Pan ),( Vin-cent Wu ) 대한신장학회 2024 Kidney Research and Clinical Practice Vol.43 No.4
Traditional acute kidney injury (AKI) classifications, which are centered around semi-anatomical lines, can no longer capture the complexity of AKI. By employing strategies to identify predictive and prognostic enrichment targets, experts could gain a deeper comprehension of AKI’s pathophysiology, allowing for the development of treatment-specific targets and enhancing individualized care. Subphenotyping, which is enriched with AKI biomarkers, holds insights into distinct risk profiles and tailored treatment strategies that redefine AKI and contribute to improved clinical management. The utilization of biomarkers such as N-acetyl-β-D-glucosaminidase, tissue inhibitor of metalloprotease-2·insulin-like growth factor-binding protein 7, kidney injury molecule-1, and liver fatty acid-binding protein garnered significant attention as a means to predict subclinical AKI. Novel biomarkers offer promise in predicting persistent AKI, with urinary motif chemokine ligand 14 displaying significant sensitivity and specificity. Furthermore, they serve as predictive markers for weaning patients from acute dialysis and offer valuable insights into distinct AKI subgroups. The proposed management of AKI, which is encapsulated in a structured flowchart, bridges the gap between research and clinical practice. It streamlines the utilization of biomarkers and subphenotyping, promising a future in which AKI is swiftly identified and managed with unprecedented precision. Incorporating kidney biomarkers into strategies for early AKI detection and the initiation of AKI care bundles has proven to be more effective than using care bundles without these novel biomarkers. This comprehensive approach represents a significant stride toward precision medicine, enabling the identification of high-risk subphenotypes in patients with AKI.
Dynamic Changes of Transcriptome and Metabolites During Ripening of Alpinia Oxyphylla Fruit (AOF)
Pan Kun,Yu Xiaodan,Wang Shujuan,Hou Jie,Luo Yuchao,Gao Bingmiao 한국식물학회 2022 Journal of Plant Biology Vol.65 No.6
Alpinia oxyphylla (Yizhi) is an economically valuable plant, not only used as edible fruit, but also as an important traditional medicinal material. However, there are few studies on fruit development and metabolic pathways. To elucidate the dynamic changes of metabolites and transcription levels during fruit development of A. oxyphylla, the four parts of A. oxyphylla fruit from different periods, including early fruit (EF), middle fruit (MF), late pericarp (LP) and late seed (LS) were collected. KEGG pathway analysis shows that DEGs in EF, MF, LP are involved in amino sugar and nucleotide sugar metabolism, starch and sucrose metabolism, and plant hormone signal transduction. However, at the late part of fruit development (LS), most of the DEGs between LS and LP were enriched in pyruvate metabolism, glycolysis/gluconeogenesis, tryptophan metabolism. We found that in the early and middle parts of fruit development (EF, MF), many differential metabolites were enriched in piperidine tropane and biosynthesis of secondary metabolites, pyridine alkaloid biosynthesis. In addition, important active components, such as nootkatone in A. oxyphylla fruits accumulated in the LS part, but did not show significant differences in the first three parts. Some key transcription factors that are significantly positively correlated with the maturation of AOF have also been identified. Together, our research provides new insights into the accumulation of metabolites and the dynamic changes of the transcriptome during fruit development.
Pan Xuchi,Xie Kun,Chen Keyu,He Ziyu,Kozue Sakao,Hou De-Xing 대한암예방학회 2022 Journal of cancer prevention Vol.27 No.1
6-(Methylsulfinyl) hexyl isothiocyanate (6-MSITC) is an active ingredient present in Wasabi, which is a popular pungent spice used in Japanese cuisine. Our previous studies suggested that the primary antioxidant activity of 6-MSITC may link to other biological activity. This study aimed to clarify how the antioxidant activity of 6-MSITC contributes to preventing overloaded lipid stress in hepatic cell model. HepG2 cells were treated with 6-MSITC at defined concentrations and times in normal medium or in combined fatty acids (CFA) medium, and the targeted proteins were detected by Western blotting. The kinetic data revealed that 6-MSITC activated AMP-activated protein kinase α (AMPKα) and nuclear factor (erythroid-derived 2) like 2 (Nrf2), and then enhanced the protein expression of Forkhead box protein O1 (FOXO1) and Sirtuin1 as well as that of the Nrf2 target proteins, NAD(P)H:quinone oxidoreductase 1 (NQO1) and heme oxygenase (HO-1). Furthermore, lipid metabolic stress was mimicked in HepG2 cells by overloading CFA. 6-MSITC significantly alleviated CFA-induced formation of thiobarbituric acid reactive substances and fat accumulation. Signaling analysis data revealed that 6-MSITC enhanced phosphorylation of AMPKα, upregulated the expression of Nrf2, NQO1, heme oxygenase 1, FOXO1, and Siruin1, and downregulated the expression of PPARα. Taken together, our results suggested that the AMPKα/Nrf2-mediated signaling pathways might be involved in the cytoprotective effects of Wasabi 6-MSITC against metabolic lipid stress.
Pan Zhang,Yuetong Zhao,Xiangfeng Tian,Yanxi Ji,Yuxuan Shu,Kun Fu,Dong Fu,Lemeng Wang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.11
Tetramethylammonium glycine ([N1111][Gly]) can be completely ionized into cation [N1111]+ and anion [Gly] in aqueous solution. The anion contains an amino -NH2 and a carboxyl -COO, both of which can react with hydrogen sulfide (H2S). Therefore, [N1111][Gly] was used to promote the selective absorption of H2S in coke oven gas (COG) by N-methyldiethanolamine (MDEA). The absorption performance and selectivity of H2S in the aqueous solution of MDEA-[N1111][Gly] were investigated. The effects of MDEA mass fraction, [N1111][Gly] mass fraction, temperature, H2S partial pressure and CO2 partial pressure on the absorption capacity and selectivity were clarified. The results showed that an aqueous solution of MDEA-[N1111][Gly] has good selectivity for H2S in COG. The absorption capacity was large and the mass fraction of the solute in the absorbent reached more than 0.55, thereby having outstanding advantages in the aspects of saving energy consumption and operating cost and having a good application potential.
Kun Jiang,Danguang Pan 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.88 No.2
Silicate glass is usually a brittle and plate-like material, and it is difficult to measure the elastic modulus by the traditional method. This paper develops a test method for the glass elastic modulus based on the fundamental frequency of the cantilever beam with an elastic support and a free end. The method installs the beam-type specimen on a semi-rigid support to form an elastic support-free end beam. The analytic solution of the stiffness coefficients of the elastic support is developed by the fundamental frequency of the two specimens with known elastic modulus. Then, the glass elastic modulus is measured by the fundamental frequency of the specimens. The method significantly improves the measurement accuracy and is suitable for the elastic modulus with the beam-type specimen whether the glass is homogeneous or not. Several tests on the elastic modulus measurement are conducted to demonstrate the reliability and validity of the test method.