SWAT 모형을 이용한 미래 기후변화 및 토지이용 변화에 따른 안성천 유역 수문 - 수질 변화 분석 (II)

이용준,안소라,강부식,김성준,Lee, Yong Jun,An, So Ra,Kang, Boosik,Kim, Seong Joon 대한토목학회 2008 대한토목학회논문집 B Vol.28 No.6B

본 연구에서는 SWAT(Soil and Water Assessment Tool) 모형을 이용하여 (I)연구에서 기구축된 현재의 유역 수문환경 조건을 활용하여 미래수문환경에 따른 유역 수문-수질 변화 분석하는데 목적이 있다. 미래의 수문자료 중 기후변화 시나리오는 Downscaling된 GCMs 자료를 이용하였으며, 미래 토지이용 시나리오는 미래 토지이용 예측 기법인 개선된 CA-Markov 기법으로 분석하여 구축하였다. 그 결과 미래의 토지이용 시나리오에 따라 주거지와 나지 등의 도시지역의 꾸준한 증가와 산림과 농경지 등의 감소가 예측되었고 미래의 기후변화 경우 강우의 변동성이 커 현재보다 더욱 더 기후변화의 대응전략이 필요할 것으로 판단된다. 미래 토지이용 시나리오와 기후변화 시나리오를 결합한 미래의 수문환경을 30-40년 주기로 나누어 장기적인 미래의 특정기간에 대한 자료를 가지고 수문 변화 분석을 실시한 결과, 강우에 의해 양상이 변할 수 있으며 그에 따라 영양물질의 부하량 또한 Sediment는 120%, T-N은 16%, T-P는 10% 증가할 수 있는 것으로 분석되었다. 따라서 수문환경의 전반적인 변화에 따른 유출 영향의 평가가 필요하다고 판단되고 향후 수자원 분배와 물자원 관리와 기후변화 적응전략을 수립하는데 있어 본 연구가 도움이 될 것이라고 판단한다. This study is to assess the future potential climate and land use change impact on streamflow and stream water quality of the study watershed using the established model parameters (I). The CCCma (Canadian Centre for Climate Modelling and Analysis) CGCM2 (Canadian Global Coupled Model) based on IPCC SRES (Special Report Emission Scenarios) A2 and B2 scenarios were adopted for future climate condition, and the data were downscaled by Stochastic Spatio-Temporal Random Cascade Model technique. The future land use condition was predicted by using modified CA-Markov (Cellular Automata-Markov chain) technique with the past time series of Landsat satellite images. The model was applied for the future extreme precipitation cases of around 2030, 2060 and 2090. The predicted results showed that the runoff ratio increased 8% based on the 2005 precipitation (1160.1 mm) and runoff ratio (65%). Accordingly the Sediment, T-N and T-P also increased 120%, 16% and 10% respectively for the case of 50% precipitation increase. This research has the meaning in providing the methodological procedures for the evaluation of future potential climate and land use changes on watershed hydrology and stream water quality. This model result are expected to plan in advance for healthy and sustainable watershed management and countermeasures of climate change.

지문인식 기반의 전자의무기록 시스템 인증 모델

이용준,Lee, Yong-Joon 한국정보처리학회 2011 정보처리학회논문지 C : 정보통신,정보보안 Vol.18 No.6

의료정보는 환자에게 중요한 개인정보로써 반드시 보호돼야 한다. 특히 전자의무기록에 접근할때, 의료인의 강화된 신원확인에 대한 인증방식이 필요하다. 기존의 공인인증서 기반 인증모델은 개인키 관리, 권한위임 등 문제점으로 전자의무기록의 특성을 반영하지 못했다. 본 논문에서는 전자의무기록 시스템에 의료인이 접근하는 경우 지문인식 기반 인증 모델을 적용하여 강화된 인증방식을 제안한다. 전자의무기록의 지문인증 모델은 의료업무의 특성을 반영하여 개인키 관리, 권한위임 문제를 원천적으로 해결하였다. Ensuring the security of medical records is becoming an increasingly important problem as modern technology is integrated into existing medical services. As a consequence of the adoption of EMR(Electronic Medical Records) in the health care sector, it is becoming more and more common for a health professional to edit and view a patient's record. In order to protect the patient's privacy, a secure authentication model to access the electronic medical records system must be used. A traditional identity based digital certificate for the authenticity of EMR has private key management and key escrow of a user's private key. In order to protect the EMR, The traditional authentication system is based on the digital certificate. The identity based digital certificate has many disadvantages, for example, the private key can be forgotten or stolen, and can be easily escrow of the private key. Nowadays, authentication model using fingerprint recognition technology for EMR has become more prevalent because of the advantages over digital certificate -based authentication model. Because identity-based fingerprint recognition can eliminate disadvantages of identity-based digital certificate, the proposed authentication model provide high security for access control in EMR.

당뇨황반부종의 치료: 비교 연구

이용준,최경식,이성진,Yong Jun Lee,MD,Kyung Seek Choi,MD,PhD,Sung Jin Lee,MD,PhD 대한안과학회 2010 대한안과학회지 Vol.51 No.6

Purpose: To compare the effect and complications of treatments for diabetic macular edema. Methods: Literature review using the Korean medical database and the Korean Ophthalmological Society database was performed. Studies used consisted of patients with diabetic macular edema, comparing intravitreal triamcinolone acetonide (IVTA) injection with posterior subtenon triamcinolone acetonide (STTA) injection or intravitreal bevacizumab (IVB) injection, according to visual acuity (VA) outcomes, central macular thickness (CMT), and intraocular pressure (IOP) at 1, 3, and 6 months. Results: In the three studies comparing IVTA injection with STTA injection, IVTA injection demonstrated greater improvement in VA at 1 month and CMT at 6 months. The patients who received IVTA injection had significantly higher IOP at 3 months. In the three studies comparing IVTA injection with IVB injection, IVTA injection demonstrated greater improvement in VA at 3 months and CMT at 6 months. Conclusions: The functional and anatomical improvements are achieved by IVTA injection, STTA injection, and IVB injection for diabetic macular edema, and the effect of IVTA injection is more prominent than other injection types with longer duration. J Korean Ophthalmol Soc 2010;51(6):849-859

스펙트럼 영역 빛간섭단층촬영 결과에 영향을 주는 다양한 인자 분석

이용준,Yong Jun Lee,MD 대한안과학회 2012 대한안과학회지 Vol.53 No.5

Purpose: To identify factors associated with variability in measures obtained by spectral domain optical coherence tomography (SD-OCT). Methods: One hundred ninety-six subjects (370 eyes) with no ophthalmic evidence of retinopathy and with corrected visual acuities better than 0.6 were included. Macular thickness and retinal nerve fiber layer (RNFL) thickness were measured using SD-OCT and were analyzed according to sex, laterality, age, spherical equivalent and signal strength. Results: The central subfield thickness was significantly lower in the female subjects (r = -0.260, p = 0.000). As age increased, average inner and outer macular thickness increased significantly (r = 0.153, p = 0.010; r = 0.193, p = 0.001). Spherical equivalent correlated negatively with central subfield thickness (r = -0.352, p = 0.000) but correlated positively with average inner macular thickness, average outer macular thickness, overall average thickness, overall macular volume, and average RNFL thickness (r = 0.181, p = 0.002; r = 0.287, p = 0.000; r = 0.346, p = 0.000; r = 0.341, p = 0.000; and r = 0.261, p = 0.000, respectively). Signal strength correlated negatively with average inner macular thickness (r = -0.136, p = 0.023). Conclusions: SD-OCT shows that retinal thickness is related to age, sex, spherical equivalent and signal strength. Analysis of retinal thickness by SD-OCT should be interpreted in the context of these findings. J Korean Ophthalmol Soc 2012;53(5):639-646

The Effect of Recombinant Human Bone Morphogenetic Protein-2/Macroporous Biphasic Calcium Phosphate Block system on Bone Formation in Rat Calvarial Defects

이용준,정성원,채경준,조규성,김창성,Lee, Young-Jun,Jung, Sung-Won,Chae, Gyung-Joon,Cho, Kyoo-Sung,Kim, Chang-Sung The Korean Academy of Periodontoloy 2007 Journal of Periodontal & Implant Science Vol.37 No.2

골형성 유도 단백질(bone morphogenetic protein, BMP)은 성장이나, 골형성과정에서 중용한 역할을 한다고 입증되었고 그것의 운반체에 대한 연구가 이뤄져 왔다. 하지만 수직압이 존재하는 곳에서 골증대술에 적용할 수 있을 만큼 강한 공간유지능력이 있는 운반체에 대한 연구는 그리 많지 않았다. Macroporous biphasic calcium phosphate block (MBCP block)은 공간유지능력이 뛰어나며 강한 수직압을 견딜수 있는 골대체물질이다. 이 연구의 목적은 MBCP block을 골형성유도 단백질(rhBMP-2)의 운반체로 사용하여 백서 두개골 결손부에 적용하였을 때, 골 형성 효과를 평가하는 것이다. 36마리의 웅성백서에서 8mm 지름을 갖는 임계크기의 두 개부 결손을 형성하였다. 20마리씩 2개의 군으로 나누어 MBCP block만 이식한 군, MBCP block을 운반체로 사용하여 농도 0.025mg/ml rhBMP-2를 이식한 군으로 나누어 술 후 2주와 8주에 치유결과를 조직학적, 조직계측학적으로 비교 관찰 하였다. 조직계측학적 관찰 결과, rhBMP-2/MBCP block 군에서 MBCP block군에서 보다 2, 8주 모두 골밀도(bone density)가 유의성있게 증가하였다 (P<0.01). 각 군에서도 8주째가 2주째보다 골밀도가 유의성있게 증가하였다(P<0.01). 총조직 형성량 (augmented area)에서는 변화가 없었다. 이 연구 결과, 백서 두개골 결손부에서 MBCP block은 rhBMP의 운반체로 사용하였을 때 신생골 형성에 유의한 효과가 있을뿐 아니라 공간유지능력이 우수해서 수직압이 존재하는 골증대술(bone augmentation)시 rhBMP의 운반체로 가능성이 있다고 사료된다.

전자서명 기록기를 이용한 공정한 부인방지 프로토콜의 설계

이용준,오해석,Lee, Yong-Joon,Oh, Hae-Seok 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.9C

Due to the overwhelming importance the Internet gained nowadays, more and more sophisticated security services are requested. However many applications such as Internet Banking, Home Trading System, Electronic Medical Recede, electronic commerce, etc. are related to non-repudiation. Non-repudiation services are one of these new security requirements. ill comparison to other security issues, such as privacy or authenticity of communications, non-repudiation has not been studied intensively. Informally, we say that a protocol is fair if at the end of the protocol execution either originator receives a non-repudiation of receipt evidence and recipient receives a non-repudiation of origin evidence or none of them receives any valid evidence. The most non-repudiation protocols rely on a trusted third party(TIP) that has to intervene during each protocols run. the TIP may create a communication bottleneck. ill this paper, we suggest the digital signature recorder that guarantees fairness logically and supplies minimal network bottleneck to be composed verification server physically. 최근 인터넷의 중요성으로 보다 다양한 보안 서비스가 요구되고 있다 부인방지 서비스는 새로운 보얀 요구사항이다. 인터넷뱅킹, 증권거래시스템 , 전자의무기록, 전자상거래 등의 많은 어플리케이션은 부인방지 서비스와 관련이 있다. 그러나 통신의 기밀성이나 신원확인에 대한 보안에 비교하여 부인방지에 대한 연구는 부족했다. 이론적으로, 부인방지 프로토콜이 종료되었을 때 발신자가 수산부인 방지증거를 획득하고 수신자가 발신부인 방지증거를 동시에 획득하거나 쌍방 모두 유효한 증거를 획득하지 못하였을 때 공정하다고 정의한다. 기존의 대부분의 부인방지서비스는 신뢰된 제3자인 TIP(Trusted Third Party)를 기반으로 하여 프로토콜의 단계마다 통신에 관여한다. 따라서 TIP는 통신부하를 발생시키는 단점이 있다. 제안하는 전자서명기록기는 논리적으로 부인방지의 공정 성을 보장하연서, 물리적으로 검증서버와 함께 구성하여 네트워크의 부하를 최소화한다.

송(宋) 명주(明州)에 건립한 고려사행관(高麗使行館)의 건축사(建築史)적 의의

이용준,Lee, Yong-Jun 한국농촌건축학회 2020 농촌건축 : 한국농촌건축학회논문집 Vol.22 No.4

This preliminary study examines historical background of construction, establishment process, and destroy process for the Goryeo-sa-haeng-guan in Myeong-Ju during the Song Dynasty. The research was conducted based on local journals at that time. The Myeong-Ju is one of the famous port cities for marine trade. The Myeong-Ju had a good relationship with the Goryeo. Especially, the Song Dynasty built the Goryo-sa-haeng-guan for Goryeo envoys and traders to maintained a good partnership with Goryeo. A comprehensive review on records and historical issues of the Goryeo-sa-haeng-guan helps us to understand foreign policy and inter-relationship between Korean and China.

송(宋) "영조법식(營造法式)" 을 통해 본 목조건축(木造建築) 평면(平面) 척도구성(尺度構成)의 고찰(考察)

이용준,Lee, Yong-Jun 한국건축역사학회 2005 건축역사연구 Vol.14 No.3

In ancient times, architectural design was seen as a critical task in building technologies. Specifically, form, dimension and structural design are of significant. These aspects are associated with each other and to be emerged as a whole. Designing plan dimension was deemed to be the core of design technology due to its close relationship with module system. Thus, its evolution as well as development process typically represents and reflects the spirits and contents of design technologies in ancient China. In China, the materials regarding ancient architectural technology include Yingzaofashi(營造法式) of Song Dynasty and Gongchengzuofazeli(工程做法則例) of Qing Dynasty. They show many aspects concerning materials, structure, scale system and building. In Yingzaofashi, although the length of objects are decided by 'cai(材)' and 'fen(分)', there are no regulations on length, width and height of a building. However, in the construction of ancient buildings, the above mentioned basic scales are very important in both design and construction. The present paper attempts to discuss the significance, namely, the design principles of length, with and height of ancient chinese architecture.

원추각막 진단에서 강화된 확장 표시방법의 유용성 평가

이용준,김선웅,Yong Jun Lee,Sun Woong Kim 대한안과학회 2010 대한안과학회지 Vol.51 No.5

Purpose: To estimate the utility of the enhanced ectasia display mode of Pentacam in discriminating keratoconus and keratoconus suspect from normal cornea. Methods: Corneal topography was measured using the Pentacam in keratoconus, keratoconus suspect and a normal control group. A best-fit sphere (BFS) and an enhanced best-fit sphere (EBFS) were used as reference surfaces for corneal elevation measurements, and measured values from both the anterior and posterior surfaces were compared among the three groups. Receiver operating characteristic (ROC) curves were used to identify the optimal posterior corneal elevation cutoff points for maximal sensitivity and specificity in discriminating keratoconus and keratoconus suspect from the normal control group. Results: Mean anterior and posterior corneal elevation were statistically higher in keratoconus than in keratoconus suspect and normal corneas. The optimal cutoff point of posterior elevation was 23 μm for the keratoconus group, and this value was associated with a sensitivity and a specificity of 96.7% and 98.6%, respectively for keratoconus. The optimal cutoff point of enhanced posterior elevation was 43 μm for the keratoconus group, and this value was associated with a sensitivity and a specificity of 96.7% and 95.5%, respectively. Conclusions: The enhanced ectasia display mode showed similar diagnostic power to that of the conventional elevation map, and the former could be more useful in a clinical setting due to the pronounced visualization of corneal elevation. J Korean Ophthalmol Soc 2010;51(5):651-657

송(宋) 《영조법식(營造法式)》 중 월량(月梁) 보머리 가공 규범에 대한 고찰

이용준,Lee, Yong-Jun 한국농촌건축학회 2019 농촌건축 : 한국농촌건축학회논문집 Vol.21 No.3

Woolyang(月梁) is a beam which whole shape is curved like a so-called moon(月). According to the ${\ll}$Yeongjobeosig(營造法式)${\gg}$, In the case of beams installed under the ceiling of a wooden building, it is used by manufacturing them in Woolyang(月梁) for maximum visual decorative effects as the shape is exposed. In order to achieve the end of a beam that is manufacturing in Woolyang(月梁), it is important to process it in a suitable size and shape for a given situation to achieve a combination with other members around it. However, in the "營造法式", the standard of production of the Woolyang(月梁) is divided into Myeongbog(明?), Chagyeon(箚牽), Pyeonglyang(平梁), and the height of each beam head is divided into 21分$^{\circ}$, 15分$^{\circ}$, 25分$^{\circ}$, but it is not possible to look at any more specific reference. In this paper, try to consider the principle of Woolyang(月梁) manufacturing and its normative contents which were indirectly proposed in the ${\ll}$Yeongjobeosig(營造法式)${\gg}$.