과학과 인지적 영역의 평가에 관한 연구

신맹립,윤지홍,김규용 濟州大學校 師範大學 科學敎育硏究所 1986 科學敎育 Vol.3 No.-

The purpose of this study is to find out students' cognitve abilities in science lessons. Bloom's Taxonomy of Educational Objectives' Klopfer's Specification for Science Education, and Piaget's cognitive Development Theory were reviewed to build the evaluating tool. The contents of the constructed tool includes 33 percents' experimental items, and the rest were non-experimental. In the evaluating methods three types of questioning were adopted : multiple choice(79%), short answer test(l5%). and essay typy(6%). Data were collected from 359 students' who are attending middle schools in two cities in Cheju-do. To find out the statistical facts, students' scores were calculated into mean, standard deviation and percentile. The analysis of the data showed the following results : The average score of students' scientific thinking ability is around 58.3 which stands for lower state of thinking ability than expected. Students got higher scores in questions on the experimental-observational contents of learning. It seems that students understand this content of learning more easily than the others. However, students got very lower scores in the contents of learning which include such higher mental-processes as secondary, synthetic functions. It suggests that teachers ought to pay more attention to this content of learning to stimulate students higher mental ability. Score distribution and higher mental function showed positive relationship. The study has made certain that through the evaluating frame of cognitive domains we can assess students ability on the experimental areas of learning except the manual skills, even if paper tests are practiced.

'선도 추격'에서 '동반 추격'으로의 전환을 위한 서비스 산업의 역할과 전략 : 한일 생산성 비교의 시사

이근,정무섭,김윤지 韓國東北亞經濟學會 2008 동북아경제연구 Vol.20 No.2

The Korean economy has grown very fast over the last decades, but it was an uneven catch-up led by a big business and manufacturing. Now it is time for co-catchup led by both manufacturing and services. This paper analyzes the weight and productivity of the service sector in Korea and suggests for policies for its improvement in productivity. The service sector in Korea is featured by low and declining productivity (both TFP and labor productivity), and a big trade deficits, which is in contrast to the trade surplus in manufacturing. This performance is worse, compared with the situation in Japan. For example, the ratio of labor productivity in service to that in manufacturing is only 14%, compared to 46% in Japan. Causes for the low performance in service include too much regulation and lack of competition due to the closed market. Thus, measures to boost up productivity in service include deregulation and market opening, which would open up the opportunity for learning from foreign companies. Industrial policy should also change from input-oriented one to network-oriented one emphasizing the unity of commodities and services.

Sectoral Innovation System and a Technological Catch-up: The Case of the Capital Goods Industry in Korea

Kim, Yoon-Zi,Lee, Keun Routledge 2008 Global economic review Vol.37 No.2

<P> This paper deals with the question of why making a catch-up is even more difficult in capital goods industries that are usually led by small or middle-sized companies. It relies upon the sectoral systems of innovation as a theoretical framework for analysis. From the findings, the paper has identified three sources of difficulties in the catch-up of the capital goods industry, particularly in machine tools. First, while small firms in the capital goods industry are usually specialized suppliers to big final goods assembly firms in the consumer goods industry or other industries, and thus the tacit knowledge accumulated from the interface between the producer and the customer firms is very important, a serious difficulty lies in the fact that local client firms are reluctant to use locally made capital goods due to their poor quality and low precision level. Second, while a successful catch-up first requires the ability to produce goods of better quality and lower prices than those produced by incumbent firms from advanced countries, a typical difficulty arises because incumbent foreign firms often react by charging predatory prices upon news of the local development of capital goods by latecomers. Third, if the catch-up firms overcome this barrier, then the next strategy used by incumbent firms is to charge latecomers with legal actions for patent violations. Despite these intrinsic difficulties, the Korean economy has achieved a very slow but gradual catch-up in the capital goods industry. The paper has attributed such achievement to several factors, including the strenuous efforts of the government, niche markets in general-purpose machine tools and emerging economies, and finally, the increasing introduction and adoption of information technology (IT) or digital technologies in machine tools. Furthermore, the three sources of barriers to catch-up imply that any latecomer firms that wish to record a successful catch-up should have these barriers in mind from the beginning of the road towards catch-up. We observe that a successful catch-up requires the ability to produce goods of better quality and lower prices than those produced by incumbent firms from advanced countries. After the initial success, they should also be well prepared against eventual or possible attacks by the incumbent firms in the forms of predatory pricing and intellectual property rights (IPR) charges.</P>

A study on the improvement of explosion-proof inspection process using process mining

Zi Moon Kim,Dong Eon Kim,Sung Geun Lee,Yoon Sik Kim 한국마린엔지니어링학회 2020 한국마린엔지니어링학회지 Vol.44 No.3

Sectoral Innovation System and a Technological Catch-up: The Case of the Capital Goods Industry in Korea

( Yoon Zi Kim ),( Keun Lee ) 연세대학교 동서문제연구원 2008 Global economic review Vol.37 No.2

Seizure with Subdural Hemorrhage in an Infant with Unrecognized Hemophilia A: Case Report of Mimicking Febrile Convulsion

( Yoon Zi Kim ),( Hoi Soo Yoon ),( Eun Hye Lee ) 경희대학교 경희의료원 2021 慶熙醫學 Vol.36 No.1

Seizure is the most common neurologic emergency in children, especially higher occurrence among infants and toddlers. Because the potential etiology of seizure in children is various, an accurate diagnosis is challenging. Even more, seizure which is associated with post-traumatic brain injuries is not common. We present one patient with hemophilia A, who presented with prolonged focal seizure and subdural hemorrhage. This patient had no family history of hemophilia but showed prolonged active partial thromboplastin time and severely low level of factor VIII (1%). This case highlights the management of prolonged focal seizure and the importance of performing neuroimaging and identifying underlying disease among children with seizure.

Encapsulated, High-Performance, Stretchable Array of Stacked Planar Micro-Supercapacitors as Waterproof Wearable Energy Storage Devices

Kim, Hyoungjun,Yoon, Jangyeol,Lee, Geumbee,Paik, Seung-ho,Choi, Gukgwon,Kim, Daeil,Kim, Beop-Min,Zi, Goangseup,Ha, Jeong Sook American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.25

<P>We report the fabrication of an encapsulated, high-performance, stretchable array of stacked planar micro-supercapacitors (MSCs) as a wearable energy storage device for waterproof applications. A pair of planar all-solid-state MSCs with spray-coated multiwalled carbon nanotube electrodes and a drop-cast UV-patternable ion-gel electrolyte was fabricated on a polyethylene terephthalate film using serial connection to increase the operation voltage of the MSC. Additionally, multiple MSCs could be vertically stacked with parallel connections to increase both the total capacitance and the areal capacitance owing to the use of a solid-state patterned electrolyte. The overall device of five parallel-connected stacked MSCs, a microlight-emitting diode (mu-LED), and a switch was encapsulated in thin Ecoflex film so that the capacitance remained at 82% of its initial value even after 4 din water; the mu-LED was lit without noticeable decrease in brightness under deformation including bending and stretching. Furthermore, an Ecoflex encapsulated oximeter wound around a finger was operated using the stored energy of the MSC array attached to the hand (even in water) to give information on arterial pulse rate and oxygen saturation in the blood. This study suggests potential applications of our encapsulated MSC array in wearable energy storage devices especially in water.</P>

기계산업에서의 중진국 함정과 기술추격: 한국 기계산업의 사례

김윤지 ( Yoon Zi Kim ) 기술경영경제학회 2006 Journal of Technology Innovation Vol.14 No.1

One of the biggest problems of Korean economy is polarization of firms for export and domestic demand and that of conglomerates and SME`s achievement. One of the culprits lies weakness of intermediate industry such as machine tool. Since intermediate industry is important path where export performance affects domestic demand and whose actor usually is SMEs with high spill over effect in labor market. Especially, intermediate industry is vulnerable because of industrial policy biased to backward linkage effect. However if a country fails to develop intermediate industry above some critical point, that country would fall in low-tech equilibrium without growth. In case of benign circle where final goods industry growth leads growth of intermediate industry and again it leads that of final goods industry, it can reach high-tech equilibrium. By contrast, in opposite case where in industrialization latecomer fails to link industries likewise above some critical point that country would fall in low-tech equilibrium without growth. Moreover, for several reasons, machine tool firms of Korea have difficulty in catching up technology above critical point. Firstly. Conglomerate demander neglects their product. Secondly, even after success of development overcoming difficulties they fail to get market share for response of dumping of foreign competitors. And the last one is patent litigation of foreign competitors that incapacitate the technology development. For these, Korean machine tool firms fell in `middle-income country trap` itself, since they stuck in some extent when they technologically catch up. Consequently, for latecomer country in machine tool industry to leapfrog meaningfully policy support is necessary. Weak intermediate industry does not induce domestic firms and remained fragile. Therefore, localization policy should reflect condition of technological catch up more than before, in order to be effective and fruitful. There should be turning point over relationship between conglomerates, major demander of machine tool and SME`s, for only with active purchasing of conglomerate Korean machine industry can grow.

바이오매스 및 개질방법에 따른 바이오차의 중금속 제거효율 및 수계 영향

김윤지 ( Yoon-zi Kim ),이한샘 ( Han-saem Lee ),김주영 ( Ju-young Kim ),신현상 ( Hyun-sang Shin ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 심포지움 Vol.2021 No.1

바이오차(Biochar, BC)는 유기성 폐자원의 열분해를 통해 생성되는 고탄소, 다공성 물질로 토양 및 수계 내에 존재하는 중금속, 유기 오염물질의 제거 효율이 높은 것으로 평가되고 있다. 최근에는, BC의 오염물질 제거 효율을 제고하고자 다양한 바이오매스 및 개질방법을 선택적으로 적용하고 있으며, 개질방법에는 대표적으로 산, 알카리용액 등을 활용한 화학적 방법과 BC 표면에 망간, 철 등을 도포하는 방법 등이 있다. 하지만, 최근까지의 많은 연구에도 불구하고, BC 특성에 따라 어떤 개질방법이 중금속 등의 제거효율 향상에 효율적이며, 바이오매스 및 개질방법에 따라 환경에 미치는 영향이 어떻게 달라지는지에 대한 비교평가가 부족하였다. 따라서, 본 연구에서는 왕겨 및 목재로부터 생성된 바이오차에 대한 다양한 개질방법을 통한 중금속 제거효율 변화를 제시하고, 각 바이오차로부터 용출되는 유기오염물질의 발생량 및 소독부산물 생성능(DBPFP)을 비교평가하여 BC 특성 및 제거물질에 따른 적정 개질방법을 제시하고자 하였다. 실험에는 왕겨바이오차(RBC)와 목재바이오차(WBC)를 사용하였으며 총 5가지 개질방법(산, 염기, 과산화수소, 망간, 철 개질)에 따라 BC를 개질하였다. 각 BC의 중금속 제거효율은 Cd, Cu, Pb, Zn를 대상으로 조사하였으며 수중에서의 DOC 발생량과 DBP 생성능을 평가하였다. 우선, 개질된 BC의 물리화학적 특성의 확인하기 위하여 BET, SEM 등의 분석을 실시하였으며, 개질 전 RBC의 표면적은 WBC에 비해 50배 큰 것으로 나타났다. RBC의 경우 alkaline 처리를 하였을 때, 25.7㎡ㆍg^-1에서 89.1 ㎡ㆍg^-1로 가장 크게 증가하였다. WBC의 경우 Mn으로 개질하였을 때, 0.3에서 9.3 ㎡ㆍg^-1로 가장 큰 증가를 보였다. RBC에서는 중금속의 농도가 저농도일수록 높은 흡착률을 보였으며, Mn 개질 후 Pb 50ppm을 흡착하였을 때, 99%의 제거율을 보였다. WBC의 경우, Mn 개질이 5가지 개질 방법 중 가장 중금속 제거효율이 높았으며, alkaline 처리도 Cd과 Cu, Pb 20ppm을 80% 이상 제거하는 것으로 나타났다. WBC는 개질 후 THMs의 생성능이 감소하였으나, RBC에서는 산 활성화 후 HAAs 생성능이 더욱 증가하는 것으로 나타났다. 따라서, 본 연구에서는 각 BC에 대한 중금속 제거효율과 수계 영향에 대한 비교평가를 통해 중금속 제거에 효율적인 바이오매스 및 개질방법에 대한 기초자료를 제시하였다.

d31 모두 압전소자를 이용한 에너지 하베스팅 드론 배터리 충전시스템에 관한 연구

김상윤(Sang-yun Kim),안현수(Hyeon-Su Ahn),방영철(Young-Cheol Bang),주대한(Dae-Han Ju),김민하(Min-Ha Kim),유시온(Zi-Ohn Yu),김남윤(Nam-Yoon Kim) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6