• Proceedings of the KSEEG Conference
• /
• 2001.04a
• /
• pp.250-251
• /
• 2001

• Journal of the Korean Magnetics Society
• /
• v.19 no.5
• /
• pp.161-164
• /
• 2009

The effect of periodic vacancies to the magnetism of the Fe monolayer was investigated by calculating the electronic structures using the full-potential linearized augmented plane wave method within the GGA approximation. We considered four types of vacancies, point defect, I type, + type, and H type which are consisted of one, three, five and seven vacant sites, respectively. We found that the Fe atoms nearest to the vacancy have the largest magnetic moment in each system, and the value of magnetic moment of the atom was increased as the number of vacancy site is increased. The value of the largest magnetic moment in the systems of point defect, I type, + type, and H type are 3.08, 3.09, 3.15, and 3.30 bohr magnetons, respectively.

• 대한핵의학회:학술대회논문집
• /
• 1990.04a
• /
• pp.182.2-183
• /
• 1990

• 대한핵의학회:학술대회논문집
• /
• 1990.04a
• /
• pp.183.1-183.1
• /
• 1990

• Radioisotope journal
• /
• v.6 no.2
• /
• pp.13-21
• /
• 1991

• Proceedings of the Korean Information Science Society Conference
• /
• 2011.06c
• /
• pp.443-446
• /
• 2011

본 연구는 컴퓨터 단층촬영 영상 (CT, Computed Tomography Image)에서 치열궁 (Dental Arch)을 자동으로 검출하는 기법을 제안한다. 제안된 기법에서는 3차원 컴퓨터 단층촬영 영상을 입력 받고 영역 확장법을 이용하여 하악을 분할 한 후 하악의 단면에서 전체적인 치아의 영역을 분할을 한다. 치아의 영역에서 세선화 작업을 거친 후 곡선 정합법을 이용하여 최종 치열궁을 검출한다. 실험 데이터로 두개골 컴퓨터 단층 촬영 데이터를 사용하였다. 본 연구는 치과 영상 데이터로부터 파노라마 영상을 얻는데 이용 될 수 있고 치과 분야의 질병 진단 및 진찰에 이용될 것으로 기대된다.

• Journal of the Korean Magnetics Society
• /
• v.19 no.3
• /
• pp.81-84
• /
• 2009

We examine the effect of U term (U = 3 eV) describing the Coulomb interactions between electrons on the results of electronic band structure calculations carried out for bcc Fe bulk, monolayer, and chain. We investigated the properties of the three Fe structures by using the all-electron total-energy full-potential linearized augmented plane wave method. The U term was included in the exchange - correlation functionals constructed on the basis of local density approximation (LDA) and general gradient approximation (GGA). We found that in the case of bcc Fe bulk structure inclusion of the U term leads to the overestimated values of magnetic moment on Fe atom. The values of magnetic moment calculated for Fe in monolayer and chain are in accordance with calculations in which the U term was not included. In general, for each system the calculated values of magnetic moment on Fe sites were larger when the U term was incorporated in the energy functional. In Fe bulk, the value of magnetic moment $2.54{\mu}_B$ for LDA+U larger than $2.25{\mu}_B$ for LDA.

• 대한방사선방어학회:학술대회논문집
• /
• 2011.11a
• /
• pp.94-95
• /
• 2011

• Proceedings of the Korean Magnestics Society Conference
• /
• 2009.05a
• /
• pp.150-151
• /
• 2009

• Proceedings of the KOSOMBE Conference
• /
• v.1996 no.11
• /
• pp.347-348
• /
• 1996