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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.
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.
발작시 얼굴찌푸림을 보이는 환자에서 발작사이극파의 전류원분석
강종수,권오영,강희영,강규식,박기종,최낙천,임병훈,이광섭 대한신경과학회 2009 대한신경과학회지 Vol.27 No.2
Facial grimacing can be a manifestation of complex partial seizures from the temporal lobe. We observed a case of seizure with facial grimacing and partial loss of consciousness during an electroencephalography recording. The recording revealed interictal spikes on the left-sided inferior temporal electrodes and ictal discharges starting on the same electrodes. The current source appeared to be in the inferior and lateral temporal areas of the left cerebral hemisphere. These results show that it is possible to localize the current sources responsible for interictal spikes. Facial grimacing can be a manifestation of complex partial seizures from the temporal lobe. We observed a case of seizure with facial grimacing and partial loss of consciousness during an electroencephalography recording. The recording revealed interictal spikes on the left-sided inferior temporal electrodes and ictal discharges starting on the same electrodes. The current source appeared to be in the inferior and lateral temporal areas of the left cerebral hemisphere. These results show that it is possible to localize the current sources responsible for interictal spikes.
The driving load measurement and durability test criteria setup method of automotive component
강종수,홍성도,신태숙 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.5
This research studied the technique to measure the driving load and set up durability performance evaluation criteria of the automotive component. Therefore, the sensor gaging and calibration were performed to measure the RLDA(real load data acquisition) on low control arm of automotive components. The real driving test was carried out on 5 real roads like city road, local road, high way, nation road and unpaved road. The damage corresponding to high rank 1% driver condition was extracted on 5 real roads using log normal probability distribution. And the total damage of low control arm component was calculated reflecting the road driving mileage ratio of general drivers. The durability performance test load and cycle counts were suggested for the low-control arm component based on 2 years or 40,000km warranty standard.