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무릎관절 통증 환자에서 멀리건 관절가동술과 맥켄지 운동이 통증과, 균형, 관절가동범위에 미치는 영향
이호종,김진영,신영일 대한정형도수물리치료학회 2022 대한정형도수물리치료학회지 Vol.28 No.2
Background: This study aimed to compare the effects of the Mulligan mobilization with movement and McKenzie exercise after applying conservative physical therapy to patients with knee pain. Methods: Patients were randomly allocatied into two groups: the Mulligan mobilization with movement (10 subjects) and the McKenzie technique (10 subjects). Each group was givenr conservative physical therapy and manual therapy sessions, three times week, for four weeks. The pain intensity was measured using the visual analogue scale (VAS). The cervical range of motion (ROM) was measured with a goniometer. Balance was measured using the modified Berg balance scale (BBS). Results: After four weeks of therapy, VAS (p<.05) decreased significantly, and ROM and balance increased siginficantly in both groups(p<.05). There was a significant improvement in knee extension (p<.05) in the McKenzie group compared to the Mulligan group. No intergroup differences were found with respect to the knee flex, VAS, and BBS (p>.05). Conclusion: The McKenzie exercises are more effective than Mulligan mobilization with movement for improving knee extension. Both interventions have the same effects on pain relief, in increasing knee flexion ROM and improving balance in patients with knee pain.
철-알루미늄 합금의 내식성에 미치는 Boron첨가의 영향
이호종 순천대학교 공업기술연구소 1992 工業技術硏究所論文集 Vol.6 No.-
The effects of boron addition on the grain size, hardness and corrosion resistance of two aluminum alloys, Fe-15 wt% Al and Fe-17 wt% Al, were investigated. 1. The average size of grains decreased in case of boron addition to both iron aluminum alloys. 2. Vickers hardness number was low either in Al rich alloy or in the alloys with boron addition. 3. Breakdown potential and repassivation potential observed from cyclic potentiodynamic polarization test curves became higher in Al rich alloy and in the alloys with boron addition. 4. The values of corrosion potential were low in Al rich alloy and high in case of boron addition.
李昊宗,潘奉贊 순천대학교 공업기술연구소 1990 工業技術硏究所論文集 Vol.4 No.-
The process of graphite formation in solid state was observed after the graphitization heat treatment of the white cast irons artificially made to contain pores or CaO inclusion by means of the additions of Se, gas bubble formation agents or CaO, a compound of oxygen in the hypoeutectic cast iron melts. The process of graphite formation in liquid state was examined after the additions of MmH_2 or Kl in the hypereutectic cast iron melts and cooling either slowly or rapidly. The influences of the amount of MmH_2 addition, different holding times after the additions and different S amount in the melts were also investigated. According to the results obtained, the mechanism of spheroidal graphite formation was studied in the view of the gas bubble theory. The results obtained in this work were as follows: 1. in the case of the graphitization heat treatment of the white cast irons under Se, CaCO_3 additions, temper carbon was preferentially precipitated on the remaining gas pores, but with only CaO addition, little graphite was formed on the CaO inclusion in the samples. From the results the behavior of graphite in solid state was preferred at the defects such as the remained pores in cast iron. 2. In the case of the addition of 0.5wt% MmH_2, a gas bubble formation agent, to the hypereutectic melts with 0.015 and 0.030wt% S, there appeared an increase in the count of spheroidal graphite, the rate of graphite formation and the time for spheroidal graphite to remain in the melts with 0.015wt% S rather than 0.030wt% S. 3. In Kl addition to the hypereutectic melts with 0.030wt% S spheroidal graphite was made when cooling the sample rapidly, but flake graphite was made when cooling slowly. These results were in accordance with the view of the gas bubble theory.
중추성 요붕증의 감별진단에 있어서의 혈중 ADH의 중요성
이호종,양인명,민선기,노정현,박철영,오승준,김덕윤,우정택,김성운,김진우,김영설,최영길 대한내분비학회 2001 Endocrinology and metabolism Vol.16 No.4
Background: Although the water restriction test (WRT) has been used as a standard test for the differential diagnosis of diabetes insipidus (DI), the measurement of plasma ADH concentration is also known to be useful method for differential diagnosis. Recent studies have shown that some patients with idiopathic central DI (CDI) were found to have a lesion on follow-up imaging studies. There have been no report in Korea on plasma ADH measurement for the differential diagnosis of DI, nor on follow-up imaging study of the idiopathic CDI. Methods: We retrospectively reviewed the clinical and laboratory findings of 26 patients (12 men, 14 women, age 9-65 years) with CDI, including pituitary MRI or CT scan, who had been diagnosed with WRT and had undergone plasma ADH concentration measurement. Results: 1) Clinical features of the patients with complete CDI did not differ from those of patients with partial CDI. 2) Maximal urine osmolality of complete CDI and partial CDI were 168±69 mOsm/㎏ and 431±141 mOsm/㎏, respectively, and the percentage increase in the urinary osmolality after ADH injection was 209±149% and 29±17%, respectively. 3) Among the 26 patients, 10 patients had their plasma ADH measured. Nine patients in this group were diagnosed as CDI by WRT and plasma ADH concentration of the 9 was compatible for CDI. The plasma ADH level was also inappropriately low in one patient who had been diagnosed with primary polydipsia by WRT, the patient was diagnosed as partial CDI. 4) The findings of follow-up MRI revealed isolated thickening of the pituitary stalk in two cases of idiopathic CDI diagnosed initially with MRI. Conclusion: This study suggests that the measurement of plasma ADH can ensure a better differential diagnosis between partial CDI and primary polydipsia, and that the patients with idiopathic CDI should be examined regularly with MRI brain scan, including the pituitary gland
흑심가단주철의 제1단 흑연화에 미치는 Se , CaCO3 및 CaO 첨가의 영향
이호종,나형용 ( Ho Jong Lee,Hyung Yong Ra ) 한국주조공학회 1986 한국주조공학회지 Vol.6 No.4
The effects of Se, CaCO₃and CaO addition on the first stage graphization of malleable iron were evaluated. The results obtained in this work were as follows. 1. Many gas bubbles were found in the white cast iron under Se, CaCO₃addition. 2. Nodular graphite were formed by annealing of the white cast iron with remained gas bubbles. 3. When specimens were annealed, bubbles provided the nucleation sites that were needed in graphite precipitation, so the nucleation rate of graphite was increased. 4. The remained gas bubbles and defects were more effective for the graphitization than metallic compounds.