• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.6D
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• pp.803-810
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• 2011

The public interest of global warming and energy shortage is gradually increased, and the related industries also have become interested in developing eco-friendly material and technology. Warm-mix asphalt (WMA) is a result of the developments to alleviate global warming and energy problems. This WMA is produced at lower temperatures than the temperature at which hot mix asphalt (HMA) is produced. Because most tests in Superpave are developed only for the performance and maintenance of HMA produced by hot temperatures, it is difficult for the tests to identify properly the material properties and then evaluate the performances between HMA and WMA. This study deals with the development of a new protocol to differentiate HMA and WMA performance, and especially the interfacial properties between asphalt and aggregate are targeted as the performance indicator; thus, an evaluation method and guideline are suggested. The concept and idea of the test method applied in this study were modified from the DSR moisture damage test protocol. In addition, TSR test was performed to affirm the relation between the asphalt-aggregate interface and the asphalt-aggregate mixture performances. The followings are the results of this study. Shear stress at 85% linear visco-elastic complex modulus (LVE $G^*$) can be a better parameter than LVE $G^*$, which can assess the interfacial or bonding performance between asphalt and aggregate. Moreover, measuring the bonding performance in thinner film thicknesses will be a better way to evaluate the real and field situation between asphalt and aggregate. The interfacial properties' criteria to apply the newly developed test and parameter should be developed, after the asphalt mixture criteria relating to the interfacial properties are completed.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.37 no.9
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• pp.1175-1182
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• 2013

The lock-in mode infrared thermography (IRT) technique has been developed to improve the detection capability of defects in materials with high thermal conductivity, and it has been shown to provide better detection capability than conventional active IRT. Therefore, to investigate the application of this technique to nuclear piping components, lock-in mode IRT tests were conducted on pipe specimens containing simulated wall-thinning defects. Phase images of the wall-thinning defects were obtained from the tests, and they were compared with thermal images obtained from conventional active IRT tests. It showed that the ability to size the detected wall-thinning defects in piping components was improved by using lock-in mode IRT. The improvement was especially apparent when detecting short and narrow defects and defects with slanted edges. However, the detection capability for shallow wall-thinning defects did not improve much when using lock-in mode IRT.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.690-692
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• 2000

인터넷의 빠른 보급으로 인해 사이버 교육 사이트가 늘어나고 있다. 사이버 교육의 장점은 언제 어디서나 손쉽게 인터넷 사이트에 접속하여 교육을 받을 수 있다는 점이다. 그러나, 사이버 교육에는 해결해야 할 문제점들이 있는바, 그 문제점 중의 하나는 학생의 수학 능력을 평가하는 것이다. 본 논문에서는 출제자가 컴퓨터로 입력한 문제에 대한 정보와 출제 기준을 구문분석하고, 정해진 형식에 맞추어 서버를 통해 저장해둠으로써 각각의 학습자가 편리한 시간에 통신에 접속하여 응시할 때마다, 출제자가 학습자에게 요구하는 평가형식으로 저장된 문제정보를 불러와서, 매번 다른 유형의 문제들을 화면상에 출력시킨다. 어떤 경우에도 새로운 문제 유형으로 시험을 공정하고 효과적으로 평가할 수 있도록 구현되어졌다. 시험평가부에서 시험문제에 대한 해설을 덧붙여 시험후의 학습 효과를 이룰수 있도록 했다.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.8 no.9
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• pp.485-494
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• 2018

This study aims to summarize characteristics of teacher certification system in China and identify its problems and improvement directions through the analysis of examination contents and examination conditions and so on. The teacher certification examination in China, including written examination and interview, is dominated by Ministry of Education. And all districts and departments put into practice according to their own characteristics and practical situations. Without distinction between normal university students and non-normal university students, only when all specific conditions are met could candidates sit for the examination. Problems of teacher certification examination are as following. The limitation of examination conditions focus on educational requirements and some basic conditions, the negligence of educational experience and practical ability, and interview tends to become apparent and formalistic.

• Proceedings of the KIEE Conference
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• summer
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• pp.491-493
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• 2004

차단기의 합성차단시험방법에 대한 연구는 오래 전부터 수행되어 시험방법 및 시험설비의 설계기술은 완성을 보았지만, 차단기의 또 다른 역할인 투입능력에 대해서는 현재까지 한국에서는 기술적인 진전이 전혀 없었다. 그러나 차단기의 성능을 완전하게 평가하기 위해서는 차단동작과 더불어 투입동작에 대한 평가방법과 설비가 필요하다. 따라서 본 논문에서는 이러한 문제점을 해결하기 위해 건설한 KERl 합성투입시험설비의 시험회로의 설계와 실증시험결과 등에 관해 기술하였다.

• Journal of Korean language education
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• v.28 no.2
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• pp.265-289
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• 2017

외국어를 학습하는 데 있어서 해당 외국어의 의사소통 능력을 향상시키고 평가한다는 것은 상당히 큰 중요성을 가진다. 교실에서 학습자의 듣기, 말하기, 읽기, 쓰기 능력을 통해 학습자의 언어 능력을 함양하고 평가하기 위해 어떠한 연습문제나 시험 혹은 평가방법을 사용하느냐 하는 것은 학습자의 학습동기에 지대한 영향을 미친다. 왜냐하면, 보통 학습자들은 교수자가 무엇을 가르치고 기대하며 평가하느냐에 따라 자신들의 학습방법을 맞춰 나가기 때문이다. 이러한 맥락에서 본 연구는 보다 적극적인 학습자들의 참여를 유도하고 유연성 있는 학습자 중심의 학습법을 고양시키며 다양한 언어능력을 고취시키기 위하여, 효과적인 외국어 학습법의 하나로 알려진 paraphrasing을 학습에 활용하고자 한다. 특히 paraphrasing은 일상생활 속에서도 의사소통을 원활히 하기 위한 수단으로서 글 바꿔 쓰기 혹은 말 바꿔 말하기로 활용되기도 하나, 본 소논문에서는 paraphrasing이 학습을 목적으로 하는 학습현장에서 활용되었다는 것을 감안하여 의역을 통한 학습 혹은 의역학습법을 소개하고자 한다. 실제로 paraphrasing은 언어 및 외국어 학습자들에게 상당히 효과가 있는 것으로 알려진 것에 비해 실제로 한국어 교육현장에서 사용한 연구들은 거의 찾아 볼 수가 없다고 해도 과언이 아니다. 따라서, 의역학습법을 학습현장에서 도입했을 때 경험한 여러 시행착오를 바탕으로 실질적으로 교실에서 사용된 예시들을 소개하고, 한국어를 가르치는 교수자들과 한국어를 배우는 외국인 학습자들에게 paraphrasing을 사용한 새로운 한국어 교수방법과 평가 도구를 제안하고자 한다. 이를 통해, paraphrasing이 한국어를 가르치는 교수자들과 한국어를 배우고자 하는 외국 학습자들에게 효과적인 언어학습 도구로서 실질적으로 교육현장에서 널리 사용될 수 있는 계기가 되었으면 한다.

• Journal of the Korea Convergence Society
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• v.13 no.1
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• pp.81-88
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• 2022

The major educational goal of reading part, which occupies important portion in Korean language in Korean SAT, is to evaluated whether a given text can be fully understood. Therefore given questions in the exam must be able to solely solvable by given text. In this paper we developed a datatset based on Korean SAT's reading part in order to evaluate whether a deep learning language model can classify if the given question is true or false, which is a binary classification task in NLP. In result, by applying language model solely according to the passages in the dataset, we were able to acquire better performance than 59.2% in F1 score for human performance in most of language models, that KoELECTRA scored 62.49% in our experiment. Also we proved that structural limit of language models can be eased by adjusting data preprocess.

• Journal of the Earthquake Engineering Society of Korea
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• v.11 no.1 s.53
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• pp.29-35
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• 2007

Flexural capacity estimation test of concrete filled carbon tube (CFCT) column under the cyclic lateral load was carried out in this study. Thickness of carbon tube and winding angles of carbon fiber were chosen as test parameters and two types of column with square and circular sections were manufactured. To act axial and lateral load, three dynamic actuators were used and all specimens were made with actual size. Flexural stiffness, ability of deformation, energy dissipation capacity and ductility behavior. of CFCT column were analyzed with test data.

• Journal of the Korean Magnetics Society
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• v.24 no.4
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• pp.114-122
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• 2014

Since 1990, Agency for Defense Development (ADD) has been operating the nonmagnetic laboratory and the magnetic sensors laboratory to develop the key technology of the ship's magnetic silencing and to research the high performance magnetic sensors used in the weapon system and to perform the technical support for Republic of Korea Navy. Recently, the main test equipment in the laboratories has been upgraded to improve the measurement and analysis abilities against magnetic target and to evaluate the performance of the magnetic sensors. In this paper, the capability and the current state of magnetic test facilities of ADD are described.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.1055-1060
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• 2009

In this paper, we design an e-Learning system for the Driver's License Teste studying through the Internet. The proposed system make users to be arrived at the goal for the license in a shorter time by offering learning contents and items according to the item-responses made by the users based on the Item Response Theory. Moreover we design the scheme to give the optimum items and the most necessary content to the user during the learning procedure in the form of concept-based objects. All the items in the problem bank DB maintain their difficulties, discriminations, and guessing parameters as is the case of 3-parameter logistic model. In addition user profile DB stores users' status informations, item responses, and ability parameters. Using these structures and combining agents, we can offer the optimum learning process or dynamic personalized studying structure to the user. We can construct interface agent and content selection and feedback agent with the DB's described above. User can study without any awareness of system operations or personal fitting scheme.