• 한국과학교육학회지
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• 제17권1호
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• pp.55-64
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• 1997

Experiments done in traditional physics laboratories have been criticized for giving too detailed instruction so that student could follow the experimental procedure without understanding. This type of experiment is often called "cookbook experiment." Cookbook experiment was known to be little help to understand the physics concepts and to increase student interest. To solve these problems with traditional cookbook experiment, non-directive introductory physics laboratory was designed and tried with the freshmen of Department of Physics Education of Seoul National University. Non-directive laboratory was characterized by the lack of step by step instruction for students to follow. The instruction students received consisted of the goal of experiment, a short introduction, and a list of suggested materials to be used. Student designed the experimental procedure and decided what material they wanted to use. One group submitted one lab report as a group to encourage cooperation among students. Lab report could be written in any form students wanted and no penalty point was given to poor data or inappropriate theory, etc to encourage taking risks. Penalty points were given if the students did not get involved during class hours. Student received extra point for being creative and / or working hard. Teaching assistants used Socratic dialogue in helping students to find their own way instead of explaining what they had to do. Students' interest about the non-directive experiment was studies at the of the semester. A questionnaire was made for students to answer. The questionnaire consisted of four categories, the equipment and the laboratory, the experimental procedure, the lab report, and teaching assistant. For each category, student were asked to explain the differences from other laboratory classes, features they liked and the reasons why they do, features they did not like and why they did not. At the end of the questionnaire, students were asked what hey wanted to change and what they did not. They also could put any opinion they had other than the questions asked. Student overall opinion was very positive. All the students said they liked the lack of detailed experimental procedure because it gave them the feeling of achievement, made them feel challenged and think in more diverse and creative ways. Students liked the lab report because group report forced them to discuss more and the free form lab report helped them to focus on the what they did. Student responses about the teaching assistant was also positive but not as enthusiastic as the experimental procedure or lab report. However students recognised that the role of the teaching assistant was as a guide, a supporter, or a facilitator.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.897-897
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• 2005

We report QLA (Quenching-rate controlled Laser Annealing) system as new concept using pulsed DPSSL and CW lasers. This process can control temperature quenching-rate of poly-Si crystallization by additional CW laser and fabricate high quality poly-Si with faster scanning speed than conventional processes. In this paper, QLA system, the experimental results and theoretical discussion will be introduced.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.1045-1048
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• 2007

We mainly report recent progress in backlight unit (BLU) for liquid crystal display (LCD) using printed carbon nanotubes (CNTs) including top-gate and lateral gate structures. Lighting performances of CNTBLU and longevity of printed CNT emitters are intensively discussed. Selected issues related with field emission display (FED) using the same emitters also are presented.

• 한국과학교육학회지
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• 제30권8호
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• pp.988-1001
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• 2010

이 연구는 문제해결형 탐구 실험에서 실험보고서의 동료 검토 활동이 실험보고서의 기술 능력과 질 개선에 미치는 영향을 알아보는 데 그 목적이 있다. 일반화학 실험을 수강하는 학생을 대상으로 실험을 수행하고, 실험보고서 작성하여 같은 수업을 받은 동료로부터 두 번이상의 검토를 받는다. 피드백을 받은 학생은 동료 검토에 대해 답변하고 보고서를 수정하여 최종보고서를 완성한다. 연구 결과, 동료 검토는 실험 보고서의 질적 향상에 영향을 미쳤으며, 특히 '실험고안'과 '결론 및 평가'과정에 큰 영향을 미쳤다. 실험보고서를 작성하면서 자신의 생각을 정리하게 되는데, 이때 동료 검토 활동은 반성의 기회를 제공하고, 객관적인 시각으로 바라볼 수 있는 계기를 마련하였다. 또한 동료 검토 활동은 서로의 의견을 주고받으며 배울 수 있는 의사소통의 장이 될 수 있다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.692-695
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• 2004

Fabrication of photosensitive carbon nanotubes paste and its post-treatment has been developed for high resolution with good electron emission uniformity. We report novel post-treatment techniques including rubber-rolling and multiple field emission cycling from which we could improve the field emission properties of printed carbon nanotubes. These techniques would be easily applicable to large area field emission display using paste of carbon nanotubes

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1213-1215
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• 2007

The OTFT technologies have been mature almost up to the level of commercialization. In this paper we report the OTFT's applications to the backplane for active matrix electrophoretic, active matrix OLED and to integrated circuits. In addition we also introduce the recently developed technologies for reduction of OTFT's operating voltage.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1233-1236
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• 2005

We report a novel approach for encapsulating of cathode electrodes in DC plasma pixels. Anode and cathode electrodes are laterally placed on a single substrate. The encapsulated electrode minimizes the sputtering of the cathode without significantly altering the turn-on voltage-pressure characteristics. An abnormal glow in current-voltage characteristics is also observed.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.891-894
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• 2008

Here we describe the new structured electrochromic(EC) materials to improve the three primary colors (RGB). We also report the simply isolated electrochromic unit cell using gel type electrolyte and show cross-talk' free driving of EC display device.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.679-682
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• 2003

We report the suitable SLS (sequential lateral solidification) as a function of laser intensity. Precursor film is changed from 50nm to 100nm and is deposited on glass substrate by PECVD. We can find the suitable SLS length by changing the mask size. In this paper, we present the well-defined grain growth conditions as a function of laser intensity.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.683-685
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• 2003

We report on a surface planarization process that produces more planar surface than previous sequential lateral solidification crystallized poly silicon films. By applying the single shot laser irradiation with optimum energy density ($(817mJ/cm^{2})$ on the ridge area after SLS crystallization, the ridge height can be decreased.