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시·도 교육청별 중·고등학교의 시설기준과 충북지역 현상설계 학교의 스페이스프로그램 비교 연구
장동훈,정진주,Chang, Dong-Hoon,Jung, Jin-Ju 한국교육시설학회 2015 敎育施設 Vol.22 No.3
Under the establishment and operating regulations of school presented only minimum standard for the founding of the school. Therefore, It is intended to suggest the reasonable space standard of the school facility, through comparison & analysis of facility standard in each city and provincial education office. Especially, The facilities standard of Chungcheongbuk-do Office Of Education has been exceeded standardization of architectural space which is proposed the Ministry of Education, and they has made the various learning space reflected creative ideas by designing all of the new school competition since 2000. In order to deal with reacting the changing method of studying like as the examples of Middle & High school in Chungcheongbuk-do, they need to set aside the enough required area for a head of students and the common space which is more than 40% in the total area according to the various learning space, securing the supporting facilities, and break & movement of the students. Moreover, Each of the city and provincial education offices are needed to establish the standardization of proper area for space organization of the planned school throughout upcoming competition.
전계인가 진공 증착법으로 제작된$\beta$ -PVDF (Poly(vinylidene fluoride)) 박막의 초전 특성
장동훈,강성준,윤영섭,Chang, Dong-Hoon,Kang, Seong-Jun,Yoon, Yung-Sup 대한전자공학회 2002 電子工學會論文誌-SD (Semiconductor and devices) Vol.39 No.5
전계인가 진공증착법으로 β상을 가지는 PVDF (Polyvinylidene Fluoride) 박막을 제작한 후, dynamic 방법으로 초전 특성을 측정하여 초전형 적외선 센서의 응용가능성에 대하여 조사하였다. PVDF 박막의 응답특성이 저주파와 고주파 영역에 따른 변조 주파수의 주파수 분산 (dispersion)으로 고려되었고, 그에 따른 초전 특성의 주파수 의존성을 관찰하였다. 저주파 (2∼100㎐) 영역에서 분역의 재배향 (reorientation) 되는 속도는 변조주파수의 속도보다 빠르므로 분극의 변화량이 증가하여 최대 값을 나타낸다. 반면에 고주파 (100∼1000㎐) 영역에서 분역의 재배향은 주파수 증가에 따라 방해를 받아 분극의 변화량이 억제되어 초전 응답이 감소하는 것을 알 수 있다. 초전계수와 전압감도 및 비검출능을 위한 재료평가지수는 각각 3.2×10/sup -10/C/㎠·K, 2.34×10/sup -10/C·cm/J 1.32×10/sup -9/C·cm/J이었고, 잡음등가전력과 비검출능은 각각 1.66×10/sup -7/W/㎐/sup ½/, 6.03×10/sup 5/cm·㎐/sup ½/W로 나타났다. The PVDF (Polyvinylidene Fluoride) thin film having P phase is prepared by the vacuum deposition with applying the electric field and its pyroelectric properties are studied by using a dynamic method to examine the possibility of the application to the pyroelectric IR sensor. The pyroelectric responses of the PVDF thin film are characterized as the frequency dispersion in both low and high modulation frequency regions, and their frequency dependences are observed. In the low frequency region (2~10Hzz), the polarization can easily rotate with the increase of modulation frequency and show the maximum since the reorientation rate of domains is higher than the modulation frequency. On the other hand, in the high frequency region (100~1000Hz), the pyroelectric response decreases as the frequency increases, because the reorienatation rate of domains is suppressed and thus, the change of polarization decreases. Pyroelectric coefficient, figure of merits for noise equivalent power and detectivity of the PVDF thin film are measured as 3.2$\times$10$^{-10}$ C/$\textrm{cm}^2$.K, 2.34$\times$10$^{-10}$ C.cm/J and 1.32$\times$10$^{-9}$ C.cm/J, respectively. Also, the noise equivalent and the detectivity are 1.66$\times$10$^{-7}$ W/H $z^{$\sfrac{1}{2}$}$, 6.03$\times$10$^{5}$ cm.H $z^{$\sfrac{1}{2}$}$W, respectively.