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굴절률에 의한 χLi₂O·y(B₂O₃·0.1Al₂O₃) 유리계의 구조 해석
강종수,양해경,문성준,강종수,정환재,김현태,정석종 全南大學校 師範大學 附設 科學敎育硏究所 1998 科學敎育硏究誌 Vol.22 No.1
The ternary xLizO . y(B20 3 . O:lAh03) glasses were made spanning the glass forming region as a function of R(=mole% Li20/mole% B203) and (=mole%AlzOJimole%B20 3). The refractive index of glasses were measured at several wavelengths (430.8nm, 486.1nm, 527.0nm, 589.0nm, 653.3nm, 687.0nm). The measured values were spanned in the range of 1.4864-' l.6136. These values have been analyzed as a function of R to facilitate of the studies on the structure of glasses. The results have indicated that; 0) the addition of lithium oxide in pure boron glasses converts B03 units with a little polarizability to B04- units and B03- units with a large one, (2) in the region of a little content of lithium, the refractive index values depend on the content of the lithium first .thing, (3) in. the region of a high content of lithium, the tangent of ,an increase of the refractive inqex is reduced because the glasses get the increase of an opening of the structure and a molar volume, (4) the polarizability of B03- unit with a lithium ion is smaller than it of B04 - unit with the same ion.
강종수,강철후,노지은,염정아,심동현,김영수,이상원,김영수,박기홍,김창훈,김수경,최낙천,권오영,강희영,백승국 대한신경집중치료학회 2018 대한신경집중치료학회지 Vol.11 No.2
Background: At most centers, general anesthesia (GA) has been preferred for endovascular treatment (EVT) of ruptured intracranial aneurysms (RIAs). In this study, we analyzed procedural results, clinical outcomes, and follow-up angiographic findings for patients undergoing EVT for RIA under local anesthesia (LA) with conscious sedation (CS). Methods: We retrospectively evaluated 308 consecutive patients who underwent EVT for RIAs at a single institution between June 2009 and February 2017. EVT under LA with CS was considered for all patients with aneurysmal subarachnoid hemorrhage, regardless of Hunt and Hess (HH) scale score. Results: EVT was performed for 320 aneurysms in 308 patients with subarachnoid hemorrhages. The mean patient age was 55.5±12.6 years. Moderate (III) and poor (IV, V) HH grades were observed in 75 (24.4%) and 77 patients (25%), respectively. Complete occlusion immediately after EVT was achieved for 270 (84.4%) of 320 aneurysms. Thromboembolic complications and intraprocedural ruptures occurred in 25 (7.8%) and 14 cases (4.3%), respectively. The morbidity rate at discharge (as defined by a modified Rankin scale score of 3 or greater) was 27.3% (84/308), while the mortality rate was 11.7% (36/308). Follow-up angiographic results were available for 210 (68.1%) of 308 patients. Recanalization was observed in 64 (29.3%) of 218 aneurysms in 210 patients. Conclusions: Based on our experience, EVT for RIAs under LA with CS was feasible, regardless of the clinical grade of the subarachnoid hemorrhage. Complication rates and follow-up angiographic results were also comparable to those observed when GA was used to perform the procedure.
Psychological Empowerment to the Organizational Commitment and Turnover Intention of Social Worker
강종수 한국콘텐츠학회 2012 International Journal of Contents Vol.8 No.1
Numerous studies have linked empowerment to employee's behaviors and attitudes. The purpose of this study was to examine the effects of empowerment on the organizational commitment and turnover intention of social worker in private social welfare organizations. For the research, empowerment was consisted of meaning, competence, self-determination and impact. This study was analyzed 342 social workers by survey. The results of this study were summarized as follows: Social Workers had correlation to empowerment on the organizational commitment (+). Especially, meaning, self-determination and impact had a positive effect on the organizational commitment; Meaning, competence, and self-determination had a negative effect on the turnover intention. This study finally discussed theoretical implications for future study and practical implications for empowerment strategies on the results.
강종수,Gang, Jong-Su 선박안전기술공단 2004 선박안전 Vol.16 No.-
연료내의 오염물질은 고체오염물질과 액체오염물질로 나눌 수 있다. 고체 오염물질은 피스톤링과 실린더 라이더의 과도한 마모를 유발하거나 연료분사 펌프와 연료 분사 밸브의 고착을 일으킬 수 있다.
사람면역결핍바이러스감염증 치료 중 발생한 중대뇌동맥협착의 악화 및 재발성 뇌경색
강종수,김민옥,이정진,박민원,김창헌,김영수,박기홍,강희영,최낙천,권오영,김수경 대한신경과학회 2018 대한신경과학회지 Vol.36 No.4
Human immunodeficiency virus (HIV) infection can result in ischemic stroke via several mechanisms, including opportunistic infection, vasculopathy, cardioembolism, and coagulopathy. HIV-vasculopathy is related to endothelial dysfunction, stenosis and aneurysm formation, infectious vasculitis, dissection and accelerated atherosclerosis during highly active antiretroviral therapy (HAART). We represent a case of HIV infection manifested as an acute ischemic stroke attack. After 4 months during HAART, our patient experienced a recurrent ischemic stroke with progression of middle cerebral artery stenosis.
Fe2O3를 첨가한 xFe2O3?(20-x)K2O?80B2O3 유리들의 전기전도 및 구조
강종수,김현태,문성준 한국물리학회 2007 새물리 Vol.55 No.6
Ternary xFe$_2$O$_3$$\cdot$(20$-$x)K$_2$O$\cdot$80B$_2$O$_3$ (x = 0.0 to 5.0 mole\%) glasses were fabricated with different Fe$_2$O$_3$ mole\%. We investigated the electric conductivity, the activation energy, the Vicker's hardness, and the refractive index for these glasses. The dc conductivity decreased with increasing Fe$_2$O$_3$ content, and the activation energy had a maximum value, $E_a$ = 1.23 eV, at the ratio x = 2.5 mole\%. The behavior of the dc-conductivity could be understood by using the electric conduction mechanism, and the activation energy was explained by using the mobility of the K$^+$ cation. The decrease and the increase in the hardness depended on the fraction of BO$_4$ units and on the tetrahedral BO$_4$$-$FeO$_4$ units in the glass network, respectively. In the region of low Fe$_2$O$_3$ content below 2.5 mole\%, the refractive index increased due to the formation of Fe$^{3+}$ ions with high polarizability, but in the region of high Fe$_2$O$_3$ content above 2.5 mole\%, the rate of increase of the refractive index decreased due to an increase in the molar volume caused by the formation of FeO$_4$ units. Fe$_2$O$_3$를 소량 첨가한 3성분 xFe$_2$O$_3$$\cdot$(20$-$x)K$_2$O$\cdot$80B$_2$O$_3$ (x = 0.0 $\sim$ 5.0 mole\%) 유리들을 제작하였다. 유리들에 대해 직류 전기전도도, 활성화 에너지, 경도, 그리고 굴절률을 조사하여 유리들의 전기전도 기구 (mechanism)와 유리 구조변화를 조사하였다. Fe$_2$O$_3$ 양의 증가에 따라 직류 전기전도도는 감소하였으며, 활성화 에너지는 x = 2.5 mole\%에서 1.23 eV의 최대값을 얻었다. 직류 전기전도도의 변화는 전기전도 기구, 그리고 활성화 에너지는 K$^+$ 양이온들의 유동성이 성분비에 따라 다르기 때문인 것으로 나타났다. 경도의 감소와 증가는 Fe$_2$O$_3$ 형성기구에 따른 유리 망목구조 내에서 형성되어진 BO$_4$ 단위수의 감소, 그리고 사면체 단위인 BO$_4$(BO$_3$)-FeO$_4$ 단위 수의 증가에 의존하였다. 그리고 굴절률의 변화는 높은 분극률 (polarizability)을 갖는 Fe$^{3+}$ 양이온의 수와 유리 망목구조의 몰 부피 (molar volume)를 증가시키는 FeO$_4$ 단위구조들의 형성에 의존하였다.