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고등학생 및 대학생의 AIDS에 관한 지식 및 태도 비교조사
최길명,선우섭,이혁,조진우,이한 경희대학교 사회체육연구소 1996 體育科學論叢 Vol.- No.9
The present research is to provide basic data for establishing an effective educational program for preventing AIDS. The following are the results of data collected from 2,123 high-school third grade students (1,051 male and 1,072 female) and 2,109 college freshman students (1,483 male and 626 female) and analyzed in terms of their status, sex, and region: 1. As for the corrects answers to the questions concerning knowledge of AIDS, high-school and college male students tend to show higher grades, especially in theepidemic and non-epidemic aspects of AIDS. 2. As for the correct answers to the questions concerning attitudes to AIDS, high-school female students tend to show higher grades. 3. As for the corrects answers to the questions on knowledge of AIDS, college students received higher grades (p<.001), especially in the epidemic and non-epidemic aspects (16 questions) of AIDS. 4. As for the correct answers to the questions concerning attitudes to AIDS, college students received higher points (p<.05), especially in preventive attitudes (10 questions). 5. The regional order of correct answers to the questions concerning knowledge of AIDS in high-school students is Kyungsang, Choongchung, Kangwon, Chunla, Cheju, Seoul, and Kyunggee. But, the order of correct answers in college students is Chunla, Seoul, Kyungsang, Kangwon, Choongchung, Kyunggee, and Cheju. 6. The regional order of correct answers to the questions concerning attitudes to AIDS in high-school students is Choongchung, Cheju, Kyungsang, Seoul, Kangwon, Chunla, and Kyunggee. However, the order of correct answers in college students is Kangwon, Kyungsang, Choongchung, Chunla, Seoul, Kyunggee, and Cheju. The research result shows that the educational program for preventing AIDS must take into consideration knowledge on epidemic and non-epidemic aspects of AIDs and preventive attitudes toward AIDS. And, it also proves that it is necessary to devise an AIDS educational program for high-school and college students.
( Hyeuk Jin Han ),( Chong Ook Park ) 한국센서학회 2014 센서학회지 Vol.23 No.3
CO2 sensor was used only one solid electrolyte in many cases. To improve the sensing characteristics of CO2 sensors, solid electrolyte CO2 sensor has been developed by bi-electrolyte type sensor using Na-Beta-alumina and YSZ. However, in many further studies, bielectrolyte type sensor was made by pellet pressed by press machine and additional treatment for formation of interface. In the aspect of mass production, using thick film and additional treatment is not suitable. In this study, CO2 sensor was fabricated by bi-electrolyte structure which was made by an NBA paste layer deposited on YSZ pellet and fired at 1650oC for 2 hour. The formation of stable interface between YSZ and NBA were confirmed by SEM image. When the type IV electrochemical cell arrangement represented by CO2,O2,Pt| Li2CO3-CaCO3||NBA||YSZ|O2,Pt is used to measure the CO2 concentration in air. This sensor EMF should depend only on the concentration of CO2 by logarithmic. Also, sensor shows PCO2 and EMF relationship like nerstian reaction at a temperature of 450oC.
Han, Hyeuk Jin,Jeong, Jae Won,Yang, Se Ryeun,Kim, Cheolgyu,Yoo, Hyeon Gyun,Yoon, Jun-Bo,Park, Jae Hong,Lee, Keon Jae,Kim, Taek-Soo,Kim, Seong-Woong,Jung, Yeon Sik American Chemical Society 2017 ACS NANO Vol.11 No.11
<P>The fabrication of a highly ordered array of single-crystalline nanostructures prepared from solution-phase or vapor-phase synthesis methods is extremely challenging due to multiple difficulties of spatial arrangement and control of crystallographic orientation. Herein, we introduce a nanotransplantation printing (NTPP) technique for the reliable fabrication, transfer, and arrangement of single-crystalline Si nanowires (NWs) on diverse substrates. NTPP entails (1) formation of nanoscale etch mask patterns on conventional low-cost Si <I>via</I> nanotransfer printing, (2) two-step combinatorial plasma etching for defining Si NWs, and (3) detachment and transfer of the NWs onto various receiver substrates using an infiltration-type polymeric transfer medium and a solvent-assisted adhesion switching mechanism. Using this approach, high-quality, highly ordered Si NWs can be formed on almost any type of surface including flexible plastic substrates, biological surfaces, and deep-trench structures. Moreover, NTPP provides controllability of the crystallographic orientation of NWs, which is confirmed by the successful generation of (100)- and (110)-oriented Si NWs with different properties. The outstanding electrical properties of the NWs were confirmed by fabricating and characterizing Schottky junction field-effect transistors. Furthermore, exploiting the highly flexible nature of the NWs, a high-performance piezoresistive strain sensor, with a high gauge factor over 200 was realized.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2017/ancac3.2017.11.issue-11/acsnano.7b06696/production/images/medium/nn-2017-06696r_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn7b06696'>ACS Electronic Supporting Info</A></P>
Carbon Dioxide Sensor Substrate for Surface-mounted Packaging
( Hyeuk Jin Han ),( Tae Wan Kim ),( Kwang Min Park ),( Chong Ook Park ) 한국센서학회 2015 센서학회지 Vol.24 No.3
Solid state electrochemical and chemo-resistive gas sensors have been used widely but can operate only under high temperature. For reducing the power consumption and optimizing the structure of the substrate of these sensors, we conducted device and circuit simulations using the COMSOL Multiphysics simulator. For assessing the effective types of substrate and heat isolation, we conducted three-dimensional thermal simulations in two separate parts; (a) by changing the shape of the contacting holes and (b) punching additional holes on the substrate. Thus, it was possible to achieve high temperature in the sensor end of the substrate while maintaining low power consumption, and temperature in the circuit.
Han, Hyeuk Jin,Kim, Tae Wan,Kim, Seongwan,Oh, Soomin,Park, Chong-Ook Elsevier Sequoia 2017 Sensors and actuators. B Chemical Vol.248 No.-
<P><B>Abstract</B></P> <P>Solid-state bi-electrolyte carbon dioxide sensors with an yttira stabilized zirconia (YSZ) and sodium beta alumina (NBA) heterojunction were fabricated using the tape casting method to measure CO<SUB>2</SUB> concentrations in the air. The enhanced interface between NBA, expressed by (1+x) Na<SUB>2</SUB>O·11 A1<SUB>2</SUB>O<SUB>3</SUB> and YSZ was made by the liquid phase sintering method while varying the ratio of Na<SUB>2</SUB>O/Al<SUB>2</SUB>O<SUB>3</SUB> from x=0 to x=0.6. YSZ/Pt electrode was used as an air reference, maintaining a constant oxygen concentration of 21%, and Na<SUB>2</SUB>CO<SUB>3</SUB> was used as a CO<SUB>2</SUB> sensing electrode. The responses of the sensors to various concentrations of CO<SUB>2</SUB> were evaluated at temperatures ranging from 550°C to 650°C. The electric potential difference of the sensors exhibited Nernstian behavior with sensitivity greater than 99% of the theoretical value at 650°C. The activity of Na<SUB>2</SUB>O at the bi-electrolyte junction remained constant, showing invariance with the CO<SUB>2</SUB> concentrations tested. The time for the initial stabilization was as short as 66s.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A bi-electrolyte carbon dioxide sensor was fabricated using a tape casting method. </LI> <LI> The sensor gave sensitive responses to carbon dioxide at 550–650°C. </LI> <LI> The carbon dioxide sensing behavior of the sensor obeyed the Nernst equation. </LI> <LI> The response time for the initial stabilization was as short as 66s. </LI> </UL> </P>
Effect of a Series Connection of a Bi-Electrolyte Hydrogen Sensor in a Leak Detector
( Hyeuk Jin Han ),( Chong Ook Park ),( Young Kyu Hong ),( Jong Suk Kim ),( Jeong Woo Yang ),( Yoon Seo Kim ) 한국센서학회 2015 센서학회지 Vol.24 No.1
Conventional leak detectors are widely based on helium gas sensors. However, the usage of hydrogen sensors in leak detectors has increased because of the high prices of helium leak detectors and the dearth in the supply of helium gas. In this study, a hydrogen leak detector was developed using solid-state hydrogen sensors. The hydrogen sensors are based on Park.Rapp probes with heterojunctions made by oxygen-ion conducting Yttria-stabilized zirconia and proton-conducting In-doped CaZrO3. The hydrogen sensors were used for determining the potential difference between air and air balanced 5 ppm of H2. Even though the Park.Rapp probe shows an excellent selectivity for hydrogen, the sensitivity of the sensor was low because of the low concentration of hydrogen, and the oxygen on the surface of the sensor. In order to increase the sensitivity of the sensor, the sensors were connected in series by Pt wires to increase the potential difference. The sensors were tested at temperatures ranging from 500.600oC.
Jin-Hyeuk Kwon,Dong-Wan Kang,Inyoung Han,Chang-Ki Shim,Jinwoo Kim 경상대학교 농업생명과학연구원 2017 농업생명과학연구 Vol.51 No.2
In the present study, a severe outbreak of Sclerotium rot on Korean melon(Cucumis melo L. var. makuwa Makino) observed in Jinju, Korea in August of 2014 and 2015 is reported. The fruit rot disease on the surface of Korean melon fruit appeared as water soaked lesion followed by the development of large rotten areas with abundant white mycelial growth. Abundant white mycelial mats with globoid and white to brown sclerotia(1-3 mm) were also developed on stems near the soil line, and infected plants withered. The fungal pathogen was isolated on potato dextrose agar(PDA) and formed white colonies with numerous sclerotia on PDA. The sclerotia were globoid in shape, 1-3 mm in size, and white to brown in color. The mycelium formed typical clamp connection. These measurements and taxonomic characteristics were most similar to those of Sclerotium. DNA sequencing and phylogenetic analysis of the complete internal transcribed spacer rRNA gene region confirmed that the fungal isolates were Sclerotium rolfsii Saccardo. Koch’s postulates were supported by pathogenicity tests conducted on fruit. Based on mycological characteristics, pathogenicity tests, and molecular identification, the fungus was identified as Sclerotium rolfsii. To the best of our knowledge, this is the first report of a Sclerotium rot caused by S. rolfsii on Korean melon in Korea.