압록강하구 초국경 스마트리전 발전에 관한 연구

임동성(Dong Sung Lim),김준봉(June Bong Kim) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2

While cross-border regional economic cooperation is increasing and smart cities are expanding into smart regions, a research on the establishment of the Dandong-Shinuiju cross-border smart region, which could emerge as a key logistics area in Northeast Asia, is meaningful. In China, economy and social infrastructure developed rapidly since the late 70’s. Dandong is one of the areas that developed in the process. In contrast, North Korea still has a lot of uncertainty. However, if North Korea starts opening to the world in the near future, Sinuiju will also begin the development. Yalu River estuary which has two cities, can be developed as a logistics specialized smart region which will be connected to Korean Peninsula, Northern China, and even Europe. Then the twin cities will grow as waterfront eco-friendly smart region with larger scale in the long run.

압록강하구 수변 생태환경 친화형 스마트리전 건설방안 연구

임동성(Lim, Dong Sung),김준봉(Kim, June Bong) 한국생태환경건축학회 2021 한국생태환경건축학회 학술발표대회 논문집 Vol.21 No.2

While cross-border regional economic cooperation is increasing and smart cities are expanding into smart regions, a research on the establishment of the cross-border smart region at the estuary of the Yalu River is meaningful. The region has beautiful landscape in excellent ecological environment close to the sea. The environment management issues continue to emerge. In such a situation, the smart region can be developed as a combination of waterfront environment-friendly cities in the region. Currently, U.N. economic sanctions and political uncertainties against North Korea continue, but cross-border cooperation in an economic sense can be implemented by connecting the two cities on the IT infrastructure of smart region.

압록강접경 스마트리전 장기 발전에 관한 연구

임동성(Dong Sung Lim),김준봉(June Bong Kim) 대한건축학회 2022 대한건축학회논문집 Vol.38 No.5

Cross-border regional economic cooperation is increasing while smart cities are expanding into smart regions. Further research on the establishment of the Dandong-Sinuiju cross-border smart region could emerge as a key logistics area in Northeast Asia. Since the late 70s, China’s economic and social infrastructure rapidly developed; Dandong is one of the areas that developed in the process. In contrast, North Korea is still entrenched in a lot of uncertainty. If North Korea were to start opening up to the world in the near future, Sinuiju has the potential to develop like Dandong. The Amnok River estuary consisting of two cities eventually could develop into a logistics specialized smart region connected to the Korean Peninsula, Northern China, and even Europe. In the long run, this smart region could substantially grow into an eco-friendly, waterfront smart region.

Er 첨가 황화물계 광섬유의 제조 및 분광학적 특성

최용규,임동성,김경헌,박세호,허종,Choi, Yong-Gyu,Lim, Dong-Sung,Kim, Kyong-Hon,Park, Se-Ho,Heo, Jong 한국세라믹학회 2000 한국세라믹학회지 Vol.37 No.8

An Er-doped sulfide fiber was drawn, and its spectroscopic properties were analyzed. Compositions of a 1000 ppmwt Er3+-doped core and an undoped clad were Ge30-Ga1-Asg-S61 and Ge30-As8-S62, in at.%, respectively. Refractive index of the core composition was approximately 0.01 high than that of the clad. In order to enhance the mechanical stability as well as to prevent infiltration of impurity ions such as OH-, an UV-curable polymer was used for the coating. The optical loss of a fiber formed directly from a polymer coated core rod without cladding was ∼15 dB/m at 1.06$\mu\textrm{m}$. In the case of a fiber with core/clad structure, the optical loss was so high that the stimulated emission of erbium fluorescence was not evident. It is believed that presence of inhomogeneous core/clad interface and crystalline aggregates precipitated in the clad region were responsible for the high optical loss. On the other hand, fluorescence characteristics of Er3+ embedded in the core region were more or loss deteriorate compared to fiber preform, which is attributed to the redistribution of the Er ions along with the partial crystallization of the core glass during the fiberization process.

$Zn_{2-x}Mn_xSiO_4$ 형광체의 망간 K 흡수단 엑스선 흡수 분광 분석

최용규,임동성,김경현,손기선,박희동,Choi, Yong Gyu,Lim, Dong Sung,Kim, Kyong Hon,Sohn, Kee Sun,Park, Hee Dong 대한화학회 1999 대한화학회지 Vol.43 No.6

PDP(plasma display panel)의 녹색 광원으로 유망한 $Zn_{2-x}Mn_xSiO_4$ 헝광체를 1300$^{\circ}C$에서 고상반응법으로 제조한 후 900$^{\circ}C$에서 후속 열처리를 실시하면 녹색 형광의 강도가 현저히 증가한다. 열처리를 통한 형광 강도의 향상과 망간의 산화 상태 및 국부 구조 변화와의 관계를 파악하고자 망간 K 흡수단의 엑스선 흡수 스펙트럼을 분석하였다. $1s{\rightarrow}3d$ 전이에 해당하는 프리엣지(preedge) 봉우리와 XANES 스펙트럼을 분석한 결과, 망간은 열처리와 무관하게 +2가의 산화 상태를 유지하였으며 Zn 자리를 치환하는 것으로 밝혀졌다. 또한 EXAFS 스펙트럼의 분석을 통하여, Mn은 $MnO_4$ 사면체를 형성하고 Mn-O 쌍의 결합 길이와 디바이월러 인자(Debye-Waller factor)는 열처리 후 공히 감소함을 알 수 있었다. Green-emission intensity of a $Zn_{2-x}Mn_xSiO_4$ phosphor, which is a potential candidate as a green component in PDP device, significantly increases provided that the compound is additionally heat treated at 900$^{\circ}C$ after solid state reaction at 1300$^{\circ}C$. In order to verify origin of such an intensity enhancement after the additional heat treatment in association with the electronic and local structural change at around Mn ions, the Mn K-edge X-ray absorption spectra were recorded. From the analyses of the preedge peak corresponding to $1s{\rightarrow}3d$ bound state transition and XANES spectrum, it is known that most Mn ions are in +2 oxidation state and substitute Zn ion site regardless of the thermal treatment. In addition, EXAFS analyses revealed that Mn ions formed $MnO_4$ tetrahedra with the Mn-O bond length shortened by 0.01${\AA}$ and with reduced Debye-Waller factor in the thermally treated sample.

만성 변비의 진단을 위한 배변조영술의 역할

신원철(Won Chul Shin),황용희(Yong Hee Hwang),정재은(Jae Eun Jung),오길선(Gil Sun Oh),심우성(Woo Sung Shim),임동성(Dong Sung Lim),박재근(Jae Keun Park),염귀종(Kui Jong Yeom) 대한영상의학기술학회 2005 대한영상의학기술학회 논문지 Vol.2005 No.1

To assess the role of Defecography and Cinedefecography for the diagnosis of chronic idiopathic constipation. A retrospective study of 122 constipated patients (33 male, 89 female) of mean age 49.5±1.5 (11-84) years who underwent defecography and cinedefecography was done. Non-relaxing puborectalis syndrome, rectocele, rectal intussusception, and sigmoidocele were observed in 43(35%), 38(31%), 22(18%), and 9(7%) of the patients, respectively. Normal cinedefecography finding was observed in 31(25%) patients. More than one abnormal finding was found in 20(16%) patients. Incidence of non-relaxing puborectalis syndrome in male was higher than that in female (M: F=55:28 %, P < 0.01). In younger female patients group( age < 40 years; 33 patients), incidence of rectocele(46%), and non-relaxing puborectalis syndrome (36%) were higher than incidences of rectal intussusception (12 %) and sigmoidocele (6 %) (P < 0.005). In older female patients group( age ≥ 40 years; 56 patients), incidences of rectocele, non-relaxing puborectalis syndrome, rectal intussusception and sigmoidocele were 41, 23, 23, and 9 percents, respectively (P < 0.05). Defecography and cinedefecography were effective diagnostic tool for idiopathic constipation, so the radiological technologist should be interested in the knowledge and technique of this study.

Shoulder Axial 검사 시 Modified Lawrence Method의 유용성 고찰

신원철(Won-Chul Shin),이양섭(Yang-Sub Lee),정시몬(Si-Mon Chung),원대연(Dae-Yeon Won),전종안(Jong-Ahn Chun),신기용(Ki-Yong Shin),박재근(Jae-Keun Park),임동성(Dong-Sung Lim),유재헌(Jae-Hyeon Lyoo) 대한영상의학기술학회 2013 대한영상의학기술학회 논문지 Vol.2013 No.-

Purpose : DR을 이용한 견관절의 축방향 촬영에서 영상의 질을 높이고 검사의 편의성과 검사 소요시간을 단축시킬 수 있는 변형된 촬영법을 적용하여 유용성을 알아보고자 하였다. Materials and Methods : 2012년 8월부터 2012년 10월까지 본원에 내원하여 견관절 축방향 검사를 시행한 환자 중 견관절의 수술병력이 없고 운동가동범위가 외전이 50° 이상 가능한 20명(남자 12명, 여자 8명)을 대상으로 하였다. Modified Lawrence method 1은선 자세에서 검사측 손은 지지대를 붙잡고 머리와 가슴을 45~90° 구부린 자세로 하였고, 중심 X선은 상완골두의 관절로 머리쪽을 향해서 수직으로 입사하였다. Modified Lawrence method 2는 동일한 자세에서 입사각을 15~20°로 수직 입사하여 영상을 획득하였다. Lawrence method는 기존의 촬영법과 같았고, tiltable standing DR method는 환자가 앉은 자세에서 검출기 위에 팔을 올리고 중심 X선은 상완골두의 관절을 향해 검출기와 평행한 상태에서 X선관을 5~15° 기울여서 수직으로 입사하였다. 설문지는 4개의 영상과 8개 항목으로 구성되었고, 영상의학과 의사 2명, 정형외과 의사 4명, 방사선사 14명에게 4점 척도로 평가하여 평균을 산출하였다. 촬영법에 대해서는 blind test를 하였다 Rseults : 각 검사의 평균소요시간은 modified Lawrence method 1과 2가 각각 52초와 56초, tiltable standing DR method는 1분 43초, Lawrence method는 3분 9초가 소요되 었다. Modified Lawrence method1이 tiltable standing DR method보다 51초, Lawrence method 보다 2분17초가 단축되었다. Modified Lawrence method 2가 평균 62.75점으로 가장 우수한 영상으로 평가되었고, modified Lawrence method 1이 50.13점, tiltable standing DR method가 48.36점, Lawrence method가 38.75점 순으로 나타났다. Modified Lawrence method 2가 8개 평가항목 중 6개 항목에서 가장 우수하다고 하였고, 전체적인 액와의 구조가 가장 잘 관찰되는 것으로 평가되었다.Conclusion : 선 자세에서 DR을 이용한 modified Lawrence method 촬영법은 단순하고 쉽게 적용할 수 있는 검사법으로서 기존 검사에 비해서 양질의 우수한 영상을 획득할 수 있었고, 검사소요시간을 단축할 수 있는 유용한 검사법이라고 사료된다. Purpose : The usefulness of a modified method of shoulder axial projection using DR was evaluated to improve image quality and to shorten the time for the examination. Materials and Methods : Of the patients who visit to out hospital and underwent an axial examination of shoulder joint from August 2012 to October 2012, twenty people(twelve men and eight women) that over 50° of shoulder abduction is possible with no operation history of shoulder joint participated in the study. In standing position, 45∼50° bending posture of upper body with the exam-side hand on a support stand and the incident X-ray toward the joint of humeral head and detector vertically was defined as modified Lawrence method 1. In the same position, the incident X-ray of 15∼20° off the vertical was defined as modified Lawrence method 2. In sitting position, the incident X-ray toward the humeral head and 5∼15° off the vertical of the detector with the arm on the table detector was defined as tiltable standing DR method. The questionnaire composed of 4 images and 8 items was evaluated by 2 radiologists, 4 orthopedic surgeons, and 14 radiological technologists on a 4-point scale. Results : The mean times for modified Lawrence method 1 and 2 were 52 seconds and 56 seconds respectively. Tiltable standing DR method was 1.43minutes, and Lawrence method was as 2.09minutes. Modified Lawrence method 1 was shortened by 51 seconds in comparison with tiltable standing DR method, and 2.28 minutes compared to Lawrence method. Modified Lawrence method 2 was evaluated as the best image quality with 62.75 point on the mean. Modified Lawrence method 1 was 50.13 point, tiltable standing method was 48.36 point, and Lawrence method was 38.75 point each. Modified Lawrence method 2 was evaluated that it showed the overall axillary structure well and represented excellence on 6 items out of 8 items of questionnaire. Conclusion : Modified Lawrence method using DR system in standing position was easily applicable, and would be useful in that showed better image quality than the