人口政策에 따른 諸課題

朴聖根(Park Seong Kun),Koh Kap Suk(토론자),Chang Man-Ki(토론자) 한국인구학회 1979 한국인구학 Vol.2 No.1

There are two main problems in formulating population policies. First, is it reasonable to formulate population policy in isolation from other social and economic policies? It is the personal belief of Mr. S. Park that a population policy should be regarded as a part of other social and economic policies. Second, there appears to be no clearly formulated long range objectives in conducting the current population redistribution policy; 1) Community development program should be based on the recognition of the special characteristics of the area. And the re-location program for industries should be strongly supported with special tax and loan consideration. 2) The policy aimed at the dispersion of population should be conducted with the program of providing an equal educational opportunity regardless of geographical location, and family planning. Discussants: Koh, Kap Suk and Chang, Man-Ki. 1. Urbanization may be considered as an inevitable result of industrialization. In order to regulate effectively the population movements into urban centers, there should be a clearly formulated population policy in co-ordination with other social and economic policies. 2. Let us assume that Korea will achieve the zero population growth rate by the year 2,000. The fact that currently there are no long range "visional" proposals to deal with the population composition and distributional problems indicates that there has been no comprehensive research about population planning. 3. The optimal population size for Korea should not be thought of in terms of a static concept but a dynamic concept which is related to manpower supply and housing problems. 4. The problem of aging should not be looked at solely as an economic issue. Instead, it should be examined from a humanistic point of view where high priority is placed on restoring human dignity for the older citizens. Response of Mr. Park: 1. There is a tendency to over-emphasize the economic side of population issues. It should be pointed out that a man not only provides labor which is an input for the production of economic goods, but also he is a consumer for whose welfare economic goods are produced in the first place. It should be remembered that economic growth has beneficial impacts on the population but it also has harmful effects. 2. In order to make the government officials aware of population issues, it has been proposed to the Population Policy Evaluation Committee that the courses in population studies be included in the study program for the re-education of government employees. 3. Issues involved in population dispersion: Urbanization is an inevitable process of economic development. Problems arising from urbanization should be solved not by forcefully preventing the migration of population from rural areas to urban centers but by reducing the rural-urban gap in the living conditions. This policy has already been implemented to some extent as indicated by the government's policy of decentralization of industries and Saemaul Movement. In summary, the basic policy of government is to slow down the rural-urban migration by providing incentives to stay in farms in the rural area rather than by the strong-handed method of preventing the internal migration.

Fabrication and Electric Properties of $\textrm{LiNbO}_3$ Thin Film by an Rf-magnetron Sputtering Technique Li-Nb-K-O Ceramic Target

박성근,백민수,배승춘,권성열,김광태,김기완,Park, Seong-Geun,Baek, Min-Su,Bae, Seung-Chun,Gwon, Seong-Yeol,Kim, Gwang-Tae,Kim, Gi-Wan Materials Research Society of Korea 1999 한국재료학회지 Vol.9 No.2

LiNbO$_3$films were prepared by an rf-magnetron sputtering technique using sintered target containing potassium. The potassium was included to help to fabricate stoichiometric LiNbO$_3$film. Structural and electrical properties of thin films was investigated as a function of deposition condition. Optimum sputtering conditions were rf power of 100W, working pressure of 1m Torr and substrate temperature of 58$0^{\circ}C$. The thin film was grown to (012) preferred orientation. The dielectric constant of the thin film LiNbo$_3$ fabricated under optimum condition was 55 at 1MHz. Average grain size is about 200$\AA$ and roughness of the film is small enough to apply to optic devices.

KLN 스퍼터링용 타겟의 제조 및 코닝 1737 유리 기판위에 성장시킨 박막의 광학적 성질

박성근,서정훈,김성연,전병억,김진수,김지현,최시영,김기완,Park, Seong-Geun,Seo, Jeong-Hun,Kim, Seong-Yeon,Jeon, Byeong-Eok,Kim, Jin-Su,Kim, Ji-Hyeon,Choe, Si-Yeong,Kim, Gi-Wan 한국재료학회 2001 한국재료학회지 Vol.11 No.3

rf-마그네트론 스퍼터링 방법을 이용하여 높은 광투과성을 지니며 c-축 배향된 KLN 박막을 제작하였다. 하소 및 소결 과정을 거쳐서 균일하고 안정한 상태의 KLN 타겟을 제조하였다. KLN 타겟은 화학량론적인 조성 및 K가 30%, 60%, 그리고 Li가 각각 15%, 30% 과량된 조성을 사용하였으며 K와 Li의 휘발을 방지하기 위하여 낮은 온도에서 소결시켰다. 제조된 타겟을 사용하여 rf-magnetron sputtering 방법으로 박막을 제조하였으며, 이때 K가 60% Li가 30% 과량된 타겟으로 제조할 때 단일상의 KLN 박막을 얻을 수 있었다. KLN 박막은 코닝 1737 기판 위에서 우수한 결정성과 높은 c-축 배향성을 나타내었으며, 이때 박막의 성장조건은 고주파 전력 100 W, 공정 압력 150 mTorr, 기판 온도 58$0^{\circ}C$였다. 가시광 영역에서 박막의 투과율은 약 90% 이고, 흡수는 333 nm에서 발생하였으며 632.8 nm에서 박막의 굴절율은 1.93이었다. Transparent and highly oriented KLN thin films have been grown by an rf- magnetron sputtering deposition method. A homogeneous and stable KLN target was prepared by calcine and sintering process. For KLN target, stoichiometry and composition excess with K of 30% and 60%, and Li of 15% and 30% respectively, was prepared. The targets were sintered at low temperature to prevent vaporization of K and Li. KLN thin films were fabricated by rf-magnetron sputtering method using those targets. In this experiment, using the target of composition excessed with K of 60% and Li of 30%, single phase KLN thin film was produced. KLN thin film has excellent crystallinity and highly c-axis oriented on Corning 1737 substrate. Transmittance of thin film in visible range was 90%, absorption edge is 333 nm and refractive index at 632.8 nm was 1.93.

헬리콥터 무기의 발달현황 및 추세

박성근,Park, Seong-Geun 한국방위산업진흥회 1983 國防과 技術 Vol.- No.60

형상기억합금의 열처리가 마르텐사이트 변태 온도에 미치는 영향

박성근,유병길,진광수,김기완,Park, Seong-Geun,Yu, Byeong-Gil,Jin, Gwang-Su,Kim, Gi-Wan 한국재료학회 1997 한국재료학회지 Vol.7 No.7

급냉온도에 따른 전기 저항 측정으로 Cu-17, 25Zn-15AI 및 Cu-17.25Zn-15AI-1Ag형상기억합금의 열처리에 의한 마르텐사이트 변태온도의 영향을 연구하였다. DSC 측정으로 고온 모상에서의 상전이 온도롸 종류를 구별하였고 XRD측정으로 구조 변화를 연구하였다. 그리고 열처리에 의한 온도 변화의 원인을 연구하였17.25Zn-15AI 합금에서 고온 모상의 규칙-불규칙 전이온도인 $T_{2}$, $T_{L21}$은 각각 809K와 610K였다. CuZnAI의 경우 $T_{2}$근방에서의 급냉은 마르텐사이트 변태온도를 높이지만 $T_{L21}$ 근방에서의 급냉은 마르텐사이트 변태온도를 낮춘다. 실험결과 열처리에 따른 상전이온도 변화의 원인은 석출물의 형성이라기 보다는 급냉전의 모상의 구조에 가장 큰 영향을 받는다.받는다.

특집_원자력 인력_기관별 원자력 인력 양성 현황- 한전 전력연구원 원자력발전연구소

박성근,Park, Seong-Geun 한국원자력산업회의 2010 원자력산업 Vol.30 No.2

스테레오 카메라를 탑재한 UAV를 이용한 3차원 위치결정

박성근,김의명,Park, Sung-Geun,Kim, Eui-Myoung 한국국토정보공사 공간정보연구원 2021 지적과 국토정보 Vol.51 No.2

소규모 지역의 3차원 공간정보를 신속하게 구축하는 분야에 UAV를 이용하는 연구가 활발히 이루어지고 있다. 본 연구에서는 지상기준점을 사용하지 않고 스테레오 카메라를 UAV에 탑재하여 영상을 수집하고 영상 매칭과 번들조정, 그리고 축척계수의 결정을 통해서 3차원 위치를 신속하게 구축하고자 하였다. 실험을 통해서 스테레오 제약조건을 이용하여 번들조정을 수행한 경우 평균제곱근오차는 1.475m로 나타났으며 축척을 고려하여 절대표정을 수행한 경우 0.029m로 나타났다. 이를 통해, 본 연구에서 제안한 스테레오 카메라를 장착한 UAV의 자료처리 방법을 이용할 경우 지상기준점을 사용하지 않고도 높은 정확도의 3차원 공간정보를 구축할 수 있는 것을 알 수 있었다. Researches using UAVs are being actively conducted in the field of quickly constructing 3D spatial information in small areas. In this study, without using ground control points, a stereo camera was mounted on a UAV to collect images and quickly construct three-dimensional positions through image matching, bundle adjustment, and the determination of a scale factor. Through the experiment, when bundle adjustment was performed using stereo constraints, the root mean square error was 1.475m, and when absolute orientation was performed in consideration of a scale, it was found to be 0.029m. Through this, it was found that when using the data processing method of a UAV equipped with a stereo camera proposed in this study, high-accuracy 3D spatial information can be constructed without using ground control points.

PLT($PbLaTiO_{3}$) 초전재료 개발(II)

박성근,배승춘,김기완,Park, Sung-Kun,Bae, Seung-Choon,Kim, Ki-Wan 한국센서학회 1997 센서학회지 Vol.6 No.6

초전재료의 개발 및 박막화를 위하여 5, 10 및 15 mol%의 La 조성을 가지는 세라믹 PLT 시편 및 박막 PLT를 제조하여 그 특성을 분석하였다. PLT의 완전 소결과 Pb 성분의 휘발을 막기 위하여 TG/DTA를 사용하여 하소 및 소결온도를 결정하였다. PLT 세라믹 시편을 제조하기 위한 하소 및 소결온도는 각각 $850^{\circ}C$, $1150^{\circ}C$ 이고 더 높은 소결온도에서는 많은 질량 손실이 발생하였다. 세라믹 시편을 사용한 온도-유전율 특성의 측정으로 La 조성에 따른 PLT의 온도에 대한 유전특성을 조사하였다. 5, 10 및 15 mol%의 La 농도에 따라 PLT의 상전이점은 각각 $330^{\circ}C$, $269^{\circ}C$ 및 $210^{\circ}C$를 나타내었다. 제조된 PLT 시편을 사용하여 적외선 감지 특성을 확인하였고, 고주파 마그네트론 스퍼터링을 이용하여 PLT 박막을 증착하였다. 다음으로 격자상수 및 광투과 특성을 통하여 완전 소결된 PLT 타겟으로 제작한 PLT 박막은 타겟과 동일한 구조를 가지고 있음을 확인하였다. We fabricated the ceramic PLT tablet which was composed of 5, 10 and 15 mol% lanthanum concentration and thin film PLT to develope pyroelectric materials, and investigated their characteristics. Using TG/DTA, we determined calcination and sintering temperature to sinter the PLT completely and to prevent volatilization of the Pb components. The calcination and sintering temperature were $850^{\circ}C$, $1150^{\circ}C$ respectively, and there was a lot of mass loss at higher sintering temperature. By measuring temperature-dielectric constant characteristics of ceramic tablet we investigated dielectric constant characteristics depends on La concentration. The Curie point of PLT with 5, 10 and 15 mol% lanthanum concentration were $330^{\circ}C$, $269^{\circ}C$ and $210^{\circ}C$ respectively. Using PLT ceramic tablet we observed IR detection characteristics, and then deposited PLT thin film by rf magnetron sputtering. We verified that PLT thin film fabricated with completely sintered PLT target had the same structure to target by investigating lattice constant and optical transparency.

소련의 전략 군사력

박성근,Park, Seong-Geun 한국방위산업진흥회 1983 國防과 技術 Vol.- No.52

북한의 새로운 무기체계

박성근,Park, Seong-Geun 한국방위산업진흥회 1988 國防과 技術 Vol.- No.109