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이수형 청주대학교 산업과학연구소 1999 産業科學硏究 Vol.17 No.1
Fe_(100-x)Zr_(x)(x=32, 40 at.%) thin films were fabricated by the DC magnetron sputtering method onto Si substrates. The thickness of thin films was 400 ㎚. It was found that all thin films were amorphous state by the x-ray diffraction methods. Ferromagnetic resonance experiments were performed on Fe_(100-x)Zr_(x)(x=32. 40 at.%) thin films at room temperature. The resonance absorption curves of Fe_(68)Zr_(32) and FE_(60)Zr_(40) thin films were observed two and three peaks respectively. The spectroscopic splitting factor g and effective magnetization were calculated by the Smith and Beljers theory.
Cyclosporine Sparing Effect of Enteric-Coated Mycophenolate Sodium in De Novo Kidney Transplantation
이수형,박재범,오창권,김명수,김성주,하종원 연세대학교의과대학 2017 Yonsei medical journal Vol.58 No.1
Purpose: The increased tolerability of enteric-coated mycophenolate sodium (EC-MPS), compared to mycophenolate mofetil, among kidney transplant recipients has the potential to facilitate cyclosporine (CsA) minimization. Therefore, a prospective trial to determine the optimum EC-MPS dose in CsA-based immunosuppression regimens is necessary. Materials and Methods: A comparative, parallel, randomized, open-label study was performed for 140 patients from four centers to compare the efficacy and tolerability of low dose CsA with standard dose EC-MPS (the investigational group) versus standard dose CsA with low dose EC-MPS (the control group) for six months in de novo kidney transplant recipients. Graft function, the incidence of efficacy failure [biopsy-confirmed acute rejection (BCAR), death, graft loss, loss to follow-up], and adverse events were compared. Results: The mean estimated glomerular filtration rate (eGFR) of the investigational group at six months post-transplantation was non-inferior to that of the control group (confidence interval between 57.3 mL/min/1.73m2 and 67.4 mL/min/1.73 m2, p<0.001). One graft loss was reported in the control group, and no patient deaths were reported in either group. The incidence of BCAR of the investigational group was 8.7%, compared to 18.8% in the control group (p=0.137), during the study period. There were no significantdifferences (p>0.05) in the incidence of discontinuations and serious adverse events (SAE) between the groups. Conclusion: CsA minimization using a standard dose of EC-MPS kept the incidence of acute rejection and additional risks as low as conventional immunosuppression and provided therapeutic equivalence in terms of renal graft function and safety issues.
이수형,민정호,이진수,황용수 경상대학교 농업생명과학연구원 2017 농업생명과학연구 Vol.51 No.2
This study was aimed to examine the potential of pre- and post-harvest treatment of chitosan and high pCO2 on the shelf-life of oriental melon fruit. Post-harvest dipping treatment of chitosan and high pCO2 did not bring any significant effect on the freshness of fruit in general, even at 1% of chitosan. Unlike post-harvest treatment, pre-harvest spray of chitosan significantly increased fruit firmness and firmness increase was higher in double sprays than single one. The internal quality such as soluble solid content and acidity was not altered by chitosan spray. No additional effect of high pCO2 with pre-harvest treatment of chitosan was found. Double sprays of chitosan showed significant effect on keeping visual appearance through delaying the incidence of skin browning. There was a potential of pre-harvest chitosan treatment on the shelf-life increase of oriental melon fruit and double sprays were better than single spray. However, high pCO2 seemed not to be effective on the storability of oriental melon fruit.
한국사회의 공동체정신 비교 분석: 향약과 두레, 새마을정신을 중심으로
이수형,이정주,최외출 한국비교정부학회 2019 한국비교정부학보 Vol.23 No.3
As a way to overcome poverty, the international community pays a great deal of attention to Korea’s development experiences, especially Saemaul Undong. Korea is actually being required to share its experience of Saemaul Undong for the development of developing countries. To meet such needs, it is necessary to understand not only Saemaul Undong but the spirit of Saemaul Undong as its practical concept. It is because researching the spirit of Saemaul Undong is necessary, and drawing the characteristics of Saemaul Undong based on the research results is important most of all. Therefore, this study comparatively analyzed the traditional spirit of the Korean society and the analysis of the spirit of Saemaul Undong through literature reviews and empirical analyses on the base of the viewpoint of social integration theory out of all the social theories that analyze social phenomena. Besides, by comparing similarities and differences between these two kinds of spirits, this study drew the characteristics of Saemaul Undong, while providing implications for sharing of development experiences of Korea with the international community.
이수형 청주대학교 2017 産業科學硏究 Vol.34 No.2
IrMn/NiFe/IrMn magnetic thin films were fabricated by the DC magnetron sputtering method. The sputtering rate was about 1 Å/s. The thicknesses of IrMn layers were 100, 200 and 300 Å and the ferromagnetic layer was 1500 Å. The ferromagnetic resonance (FMR) experiments have been used to investigate the magnetic properties and spin waves of the ferromagnetic layer. The microwave frequency and power were 9.43 GHz and 1 mW, respectively. The resonance spectra with one or two absorption signals were observed for all the samples under the parallel magnetic fields. The several resonance signals of the standing spin waves were observed at the perpendicular configuration. The g factors, effective magnetizations and exchange stiffness constants were calculated from the resonance spectra.