• 대한화학회지
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• 제62권3호
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• pp.214-225
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• 2018

본 연구에서는 우리나라 과학과 교과서에서 열과 열에너지 용어를 어떻게 정의하고 어떤 의미로 사용하고 있는지, 그리고 과학의 영역별로 이 용어들의 사용 의미에 차이가 있는지 알아보고자 하였다. 이를 위해 2009 개정 교육과정에 의한 초 중 고 과학과 교과서 52권의 내용을 분석하였다. 열 용어의 정의는 중학교 과학(1)과 고등학교 물리 I, II 교과서에서 제시되는데, 대부분의 교과서가 열을 "온도 차이에 의해 이동하는 에너지(유형 I)"로 정의하였고 물리 I 교과서 1종에서만 "온도 차이에 의한 에너지의 이동(유형 II)"으로 정의하였다. 열에너지 용어의 정의는 대체로 중학교 과학(2)와 고등학교 물리 I 교과서에 제시되는데, 물리 I 교과서는 "분자 운동 에너지(유형 III)"로 정의하였지만 과학(2) 교과서에서는 유형 I 또는 "물체의 상태나 온도를 변화시키는 에너지(유형 IV)"로 정의하였다. 교과서 본문 서술에서 열 용어는 주로 유형 I 또는 유형 III의 의미로 사용되었고, 열에너지 용어는 주로 유형 III의 의미로 사용되었으나 고등학교 물리와 화학 교과서에서는 유형 I의 의미로 사용되기도 하여 열과 열에너지 용어를 혼용하고 있었다. 과학의 영역별로 보면 열과 열에너지 용어를 물리와 화학에서는 주로 유형 I과 유형 III의 의미로 사용하였고, 생명과학과 지구과학에서는 주로 유형 III의 의미로 사용하여 영역별로 차이가 있었다.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 Proceedings of The 6th korea-china joint workshop on nuclear waste management
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• pp.76-85
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• 2005

The conceptual study of Accelerator Driven System (ADS) had lasted for about five years and ended in 1999 in China. As one project of 'the major state basic research program (973)' in energy domain, which is sponsored by the China Ministry of Science and Technology (MOST), a five years program of basic research for ADS physics and related technology has been launched since 2000 and passed national review last month. CIAE (China Institute of Atomic Energy), IHEP (Institute of High Energy Physics), PKU-IHIP (Institute of Heavy Ion Physics in Peking University) and other institutions are jointly carrying on the research. The research activities are focused on HPPA physics and technology, reactor physics of external source driven sub-critical assembly, nuclear data base and material study. For HPPA, a high current injector consisting of an ECR ion source, LEBT and a RFQ accelerating structure of 3.5MeV has been built. In reactor physics study, a series of neutron multiplication experimental study has been carried out and is being carrying on. The VENUS facility has been constructed as the basic experimental platform for the neutronics study in ADS blanket. It's a zero power sub-critical neutron multiplying assembly driven by external neutron produced by a pulsed neutron generator. The theoretical, experimental and simulation study on nuclear data, material properties and nuclear fuel circulation related to ADS is carrying on to provide the database for ADS system analysis. The main results on ADS related researches will be reported.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.234-237
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• 2007

We report on our experience on utilization of collaborative tools for KISTI high energy physics group. Our main subject will be the new EVO (Enabling Virtual Organization) server that we hosted recently at KISTI. The EVO is a next generation collaborative tool from CalTech high energy physics group with several improvements from its predecessor VRVS (Virtual Room Videoconferencing System). EVO has the same baseline structure as in VRVS. The network of servers lies at the heart of EVO structure and one server called Panda communicates with local clients called Koala.

• 한국의학물리학회지:의학물리
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• 제1권1호
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• pp.3-10
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• 1990

No Abstract, See Full Text

• Journal of the Optical Society of Korea
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• 제4권2호
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• pp.75-78
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• 2000

We design a high temperature oven for measuring the saturation intensity of the transition line $4f^ 6/6s^{2 7}7F_0 ↔ 4f^6/6s6p $^1$P(J = 1)$ of the samarium atom. We first constructed a high temperature oven to generate the samarium vapor column and study the thermal characteristics of the oven. The oven is able to operate at a temperature up to about 1400 $^{\circ}C$ and the operation is tested by using several metals with high melting points. We describe two wave mixing experiment with the samarium vapor generated in the high temperature oven and obtain the saturation intensity by analyzing the first diffraction signal.

• 한국진공학회지
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• 제21권2호
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• pp.113-119
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• 2012

탄소나노튜브는 1차원의 구조에 기인하는 우수한 물리적, 전기적 특성으로 인해 다양한 분야에 응용 가능한 물질로 각광받고 있다. 특히, 수직 정렬된 단일벽 탄소나노튜브의 합성은 향상된 특성들을 기대할 수 있으며 다양한 분야로 활용가능하다. 본 연구에서는 열 화학기상증착법을 이용하여 합성과정에서 촉매층의 두께, 아세틸렌 가스의 주입량, 합성온도의 변화가 탄소나 노튜브의 길이와 직경에 미치는 영향을 조사하였다. 또한 위와 같은 조건에서의 촉매의 구조변화에 초점을 두어 이러한 현상을 이해하고자 하였다. 이러한 결과를 바탕으로 합성조건을 최적화하여 수백 ${\mu}m$ 길이의 결정성이 우수한 수직 정렬된 단일벽 탄소나노튜브를 합성하였다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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• pp.292.2-292.2
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• 2013

Graphene, a two-dimensional graphite material consisting of sp2-hybridized carbons. The properties of graphene such as extremely high carrier mobility, high thermal conductivity, low resistivity, large specific make it a promising materail of divices and material. Typically, poly (methyl methacrylate) (PMMA) is used when graphene transfer to other substrates. To remove PMMA on graphene, people used to dip the graphene into the acetone. However, it is known that the remove of PMMA on the graphene is difficult to completely using the acetone. Therefore, to remove the PMMA on the graphene surface, many research groups have employed various methods such as the thermal treatment, photothermal method, and other solvent. Nevertheless, a part of PMMA still remain on graphene surface. Usually, to observe the residual PMMA on graphene surface, topography of graphene surface scanned by atomic force microscopy is used. However, in that case, we can not distinguish PMMA and other particles. In this study, to confirm the residual PMMA on graphene surface, we employed novel measurement technique which is available to distinguish PMMA and other particles by means of photothermal effect.

• 한국전기전자재료학회논문지
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• 제34권5호
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• pp.283-295
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• 2021

For the last decades, a research hotspot for the halide perovskites (HPs) is now showing great progress in terms of improving efficiency for numerous photovoltaic devices (PVDs). However, it still faces challenges in the case of long-term stability in the air atmosphere. Defect-free high-quality HP single crystals show their promising properties for the remarkable development of highly efficient and stable PVDs. Here, we summarize the growth processing routes for the stable HP single crystals as well as briefly discuss the pros and cons of those well-established synthesis routes. Furthermore, we briefly include the comparison note between the HP single crystals and polycrystalline perovskite films regarding their device applications. Based on the future progress, the review concludes subjective perspectives and current challenges for the development of HPs high-quality PVDs.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.242-242
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• 2016

Magnetite, Fe3O4, is a ferrimagnet with a cubic inverse spinel structure and exhibits a metal-insulator, Verwey, transition at about 120 K.[1] It is predicted to possess as half-metallic nature, 100% spin polarization, and high Curie temperature (850 K). Cobalt ferrite is one of the most important members of the ferrite family, which is characterized by its high coercivity, moderate magnetization and very high magnetocrystalline anisotropy. It has been reported that the CoFe2O4/Fe3O4 bilayers represent an unusual exchange-coupled system whose properties are due to the nature of the oxide-oxide super-exchange interactions at the interface [2]. In order to evaluate the effect of interface interactions on magnetic and transport properties of ferrite and cobalt ferrite, the CoFe2O4/Fe3O4 superlattices on MgO (100) substrate have been fabricated by molecular beam epitaxy (MBE) with the wave lengths of 50, and $200{\AA}$, called $25{\AA}/25{\AA}$ and $100{\AA}/100{\AA}$, respectively. Streaky RHEED patterns in sample $25{\AA}/25{\AA}$ indicate a very smooth surface and interface between layers. HR-TEM image show the good crystalline of sample $25{\AA}/25{\AA}$. Interestingly, magnetization curves showed a strong antiferromagnetic order, which was formed at the interfaces.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 1999년도 Japanese Journal of Medical Physics
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• pp.86-87
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• 1999