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초등학생의 귀납적 과학지식 생성능력 평가를 위한 서술형 지필과제 및 지수 산출식의 개발 - 오리 관찰 및 분류과제를 중심으로 -
조은별 ( Eun Byul Jo ),신동훈 ( Dong Hoon Shin ) 韓國生物敎育學會 2016 생물교육 Vol.44 No.4
Considering both elementary school students` cognitive developmental level and scientific experiment performing ability, duck observation and classification paper test items are developed. Also, counting formulas that convert qualitative observation ability and classification ability into quantitative figure are developed. Conclusions of this research are as follow. First, the duck test items are designed to have students inductively generate scientific knowledges through solving the descriptive paper test items. So elementary school students` inductive scientific knowledge generating ability can be assessed by analyzing their task product without any extra experiment. Second, elementary school students` inductive scientific knowledge generating ability can be quantitatively evaluated by combining both observation ability quotient and classification ability quotient.
초등학생의 과학적 가설생성능력 평가를 위한 서술형 지필과제 및 가설생성능력지수 산출식의 개발
조은별 ( Eun Byul Jo ),신동훈 ( Dong Hoon Shin ) 한국초등과학교육학회 2016 초등과학교육 Vol.35 No.2
The purpose of this study is to develop a descriptive paper test item which can evaluate elementary school students’ HGA (scientific Hypothesis Generating Ability) and to propose a counting formula that can easily assess student’s HGA objectively and quantitatively. To make the test item can possibly evaluate all the students from 6th graders to 3rd graders, the ‘rabbit’s ear’ item is developed. Developed test item was distributed to four different elementary schools in Seoul. Total 280 students who were in the 6th grade solved the item. All the students’ reponses to the item were analyzed. Based on the analyzed data evaluation factors and evaluation criteria are extracted to design a Hypothesis Generating ability Quotient (HGQ). As the result ‘Explican’s Degree of Likeness’ and ‘Hypothesis’ Degree of Explanation’ are chosen as evaluation factors. Also precedent evaluation criteria were renewed. At first, Explican’s Degree of Likeness evaluation criterion was turned four levels into three levels and each content of evaluation criterion is also modified. Secondly, new evaluation factor ‘Hypothesis’ Degree of Explanation’ was developed as combined three different evaluation criteria, ‘level of explican’, ‘number of explican’ and ‘structure of explican’. This evaluation factor was designed to assess how the suggested hypothesis can elaborately explain the cause of one phenomenon. Newly designed evaluation factors and evaluation criteria can assess HGA more in detail and reduce the scoring discordant through the markers. Lastly, Developed counting formula is much more simple than precedent Kwon’s equation for evaluating the Hypothesis Explanation Quotient. So it could help easily distinguish one student’s scientific hypothesis generating ability.
Jang, Eun-Pyo,Jo, Jung-Ho,Lim, Seung-Won,Lim, Han-Byule,Kim, Hwi-Jae,Han, Chang-Yeol,Yang, Heesun The Royal Society of Chemistry 2018 Journal of Materials Chemistry C Vol.6 No.43
<P>In the fabrication of color-conversion-based quantum dot-light-emitting diodes (QD-LEDs), the on-chip type is the most cost-effective, processing-convenient configuration and thus should replace well-developed but costly on-surface ones. To render on-chip QD-LEDs viable, however, the encapsulation of QDs with chemically stable species should additionally precede fabrication to prevent substantial QD degradation occurring under LED driving accompanied by high temperature and intense photon flux. For this, we explore an unconventional but simple formation of silica composites embedded with technologically important but relatively delicate non-Cd InP QDs, where a sol-gel reaction proceeds in a catalyst-free, waterless manner with a silane precursor of (3-aminopropyl)trimethoxysilane (APTMS). This ATPMS-based silica reaction is attempted first with green InP QDs with a multi-shell structure of a composition-gradient ZnSeS intermediate shell plus a ZnS outer shell, showing that it enables excellent retention of the original photoluminescence of pristine QDs as well as uniform formation of QD-silica composites. Subsequently, two InP/ZnSeS/ZnS QDs of green and red emission are co-reacted in the silica reaction to yield dual color-capable QD-silica composites. These single- and dual-colored QD-silica composites are combined as color-converters with a blue LED in an on-chip configuration. The device stability of bicolored and tricolored QD-LEDs fabricated as such is then evaluated under continuous operation at 60 mA for an extended period of time, leading to the outstanding retention of initial QD emission as high as 93-94% even after 100 h-operation and clearly validating the effectiveness of the present silica embedding on QD passivation against a harsh LED driving environment.</P>
The properties of Li-Ni-Mn-O powders prepared by spray pyrolysis
강윤찬,Eun Byul Jo,주서희,Hee Chan Jang 한양대학교 세라믹연구소 2007 Journal of Ceramic Processing Research Vol.8 No.5
Li-Ni-Mn-O cathode powders with various ratios of nickel and manganese components were prepared by ultrasonic spray pyrolysis from polymeric precursor solutions. The precursor powders obtained from the polymeric precursor solutions containing citric acid and ethylene glycol were several micrometre in size, had a spherical shape and hollow morphology irrespective of the ratios of nickel and manganese components. However, the morphology of the post-treated Li-Ni-Mn-O cathode powders were affected by the ratios of nickel and manganese components. The LiMn1.5Ni0.5O4 and LiNi0.5Mn0.5O2 cathode powders were several micrometre in size, had a hollow and spherical morphology. However, the LiMn2O4 and LiNi0.75Mn0.25O2 cathode powders had a fine size and regular morphology. The mean sizes of the LiMn2O4 and LiNi0.75Mn0.25O2 cathode powders were 1.2 and 0.26 μm, respectively. The initial discharge capacities of the prepared Li-Ni-Mn-O cathode powders were changed from 120 to 206 mAhg−1 according to the ratios of nickel and manganese components. Li-Ni-Mn-O cathode powders with various ratios of nickel and manganese components were prepared by ultrasonic spray pyrolysis from polymeric precursor solutions. The precursor powders obtained from the polymeric precursor solutions containing citric acid and ethylene glycol were several micrometre in size, had a spherical shape and hollow morphology irrespective of the ratios of nickel and manganese components. However, the morphology of the post-treated Li-Ni-Mn-O cathode powders were affected by the ratios of nickel and manganese components. The LiMn1.5Ni0.5O4 and LiNi0.5Mn0.5O2 cathode powders were several micrometre in size, had a hollow and spherical morphology. However, the LiMn2O4 and LiNi0.75Mn0.25O2 cathode powders had a fine size and regular morphology. The mean sizes of the LiMn2O4 and LiNi0.75Mn0.25O2 cathode powders were 1.2 and 0.26 μm, respectively. The initial discharge capacities of the prepared Li-Ni-Mn-O cathode powders were changed from 120 to 206 mAhg−1 according to the ratios of nickel and manganese components.
Jang, Han Byul,Hwang, Joo-Yeon,Park, Ji Eun,Oh, Ji Hee,Ahn, YounJhin,Kang, Jae-Heon,Park, Kyung-Hee,Han, Bok-Ghee,Kim, Bong Jo,Park, Sang Ick,Lee, Hye-Ja BMJ Publishing Group Ltd 2014 Journal of medical genetics Vol.51 No.12
<P><B>Background</B></P><P>A low serum level of high-density lipoprotein cholesterol (HDL-C) is a risk factor for cardiovascular disease. Proprotein convertase subtilisin/kexin type 5 (<I>PCSK5</I>) modulates HDL-C metabolism through the inactivation of endothelial lipase activity.</P><P><B>Methods</B></P><P>Therefore, we analysed the effects of <I>PCSK5</I> on HDL-C and investigated the association between genetic variation in <I>PCSK5</I> and dietary polyunsaturated fatty acids (PUFAs) intakes in Korean adults and children. This population-based study which was conducted in South Korea included 4205 adults (43% male) aged 40–69 years and 1548 children (48.6% boys) aged 8–13 years. Dietary intake was assessed using a semiquantitative food frequency questionnaire in adults and modified 3-day food records in children.</P><P><B>Results</B></P><P>After adjustments for age and body mass index, we identified a significant association between SNP rs1029035 of the <I>PCSK5</I> gene and HDL-C concentrations specifically for men in both populations (adults, p=0.004; children, p=0.003; meta, p=7×10<SUP>−4</SUP>). Additionally, the interaction between the <I>PCSK5</I> rs1029035 genotype and dietary polyunsaturated fatty acids intake influenced serum HDL-C concentrations in men (adults, p=0.001; children, p=0.008). The deleterious effect of the C allele on serum HDL-C was present only when dietary PUFA intake was less than the dichotomised median level (adults, p=0.011; children, p=0.001). Serum HDL-C concentrations were decreased in men with the C allele genotype and low consumption of dietary PUFA including n-3 and n-6.</P><P><B>Conclusion</B></P><P>According to these results, men carrying of the C allele were associated with low HDL-C concentrations and might exert beneficial effects on HDL-C concentrations following consumption of a high-PUFA diet.</P>
김은별,박종길,김백조,Kim. Eun-Byul,Park. Jong-Kil,Kim. Baek-Jo 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1
Recently, occurrence frequency of natural disasters decrease but scale of damage increase remarkably by the Climate change due to global warming. Especially, extreme heat become more critical weather problem in the Korean Peninsula. But, we don`t have exact threshold about extreme heat. Extreme heat does not classify into natural disaster. Therefore, we have compared death count of the natural disaster with the one of extreme heat at Seoul, Korea. As a result, the number of death by extreme heat don`t smaller than one by the natural disasters and we knew extreme heat have also to consider as natural disaster.
Mohiuddin, Md,Akther, Asma,Jo, Eun Byul,Kim, Hyun Chan,Kim, Jaehwan Professional Engineering Publishing Ltd 2016 Proceedings of the Institution of Mechanical Engin Vol. No.
<P>The present study investigates a film actuator made with dielectric cellulose acetate films separated by narrow spacers as a means of electrostatic actuation for potential haptic application. Fabrication process for the actuator is explained along with experiments conducted over a wide frequency range of actuation frequency. A valid finite element simulation of the actuator is made on the quarter section of the actuator by using full 3D finite elements. Vibration characteristics such as fundamental natural frequency, mode shape and output velocity in the frequency range for haptic feeling generation are obtained from the finite element analysis and compared with the experimental results. Experimental results demonstrate that the finite element model is practical and effective enough in predicting the vibration characteristics of the actuator for haptic application. The film actuator shows many promising properties like high transparency, wide range of actuation frequency and high vibration velocity for instance.</P>
기후변화적응을 위한 기상특보 인지도 및 활용도 분석: 건조특보를 중심으로
최수진 ( Su Jin Choi ),김은별 ( Eun Byul Kim ),정우식 ( Woo Sik Jung ),김백조 ( Baek Jo Kim ),박종길 ( Jong Kil Park ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.6
This study aims to find the perception and utilization of the citizen about the dryness watch warning (DWW) among special weather reports. For this we have made up a descriptive questionnaire including the perception, utilization of special weather reports. Using the SPSS 17.0 program, descriptive statistics, t-test, ANOVA and Scheffe test were used to analyze the collected data. The results are as follows; The perception of DWW is measured by 4 point Likert scale and the average is 15.97±3.70 (percentile=57.0). This value shows that the awareness level is not that high and according to the occupation, college students show the lowest awareness and housewives show the highest awareness. According to the age, the teens and twenties show the lowest awareness and fifties and sixties show the highest awareness. Although the perception of the teens and college students are rather poor, there were many positive answers that it is necessary to establish the advanced disaster prevention plan according to the questionnaire about the utilization of DWW. Therefore, if we come up with an effective plan to improve the perception than we can expect a large-effect in terms of fire and forest fire prevention. The perception of DWW can be improved by providing weather information and weather related education program on TV or internet which have the high level of preference. Also, it is necessary to provide online and offline program of advertising education and disaster management education through the weather forecast bureau which is the host organization of delivering weather information.