노후 공동주택 재건축 판정을 위한 안전진단의 경제성 평가방법 I - 구조체 보수보강을 중심으로 -

이상준 ( Lee¸ Sang-jun ),최성은 ( Choi¸ Sung-eun ),박태근 ( Park¸ Tae-keun ),이현수 ( Lee¸ Hyun-soo ),김승진 ( Kim¸ Seung-jin ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2

Since 1970's industrialization, a Multi-Housing Complex has been constructed to solve the shortage of housing situation. Chased quantitative increasing in Housing policy called reconstruction for apartment houses. However injudicious reconstruction for apartment houses lost essential intention and felt into one method of personal profit pursuit. One of the reason why is unobjective and unsystematic in Safety Diagnosis for Reconstruction Decision. So, this study is to find the problem and to establish the objective and quantified standard in Safety Diagnosis for Reconstruction. I want this study to assist to prevent the environmental disruption in cities and a waste of resource. This study focused on a repairing and reinforcement of structure in the field of Economic Analysis’ method in Safety Diagnosis for Reconstruction.

중국의 북한과 베트남 정책 연구, 1949~1964

한상준 ( Han¸ Sang Jun ) 한국중국학회 2021 중국학보 Vol.97 No.-

본고는 중국 주변의 대표적인 사회주의 국가인 북한과 베트남에 대한 중국의 정책을 1949년 신중국 수립 전후시기부터 1954년 제네바 회담까지의 기간을 하나로, 1960년 전후시기부터 미국이 베트남 전쟁에 직접 개입했던 1964년까지의 기간을 다른 하나로 구분하여 검토하였다. 그 두 기간 중국의 북한과 베트남에 대한 지원과 개입은 중국이 아시아 혁명세력을 위해 국제주의적 의무를 충실히 이행했던 것으로 평가할 수 있다. 하지만 중국의 북한과 베트남에 대한 정책을 중공의 혁명성이 발현된 결과로서만 해석하는 것은 타당하지 않다. 중국혁명의 완수와 신중국의 수립은 중공의 정체성이 ‘혁명정당’에서 ‘집권정당’으로 전환됐다는 것을 의미했고, 중공정권이 당면했던 최대의 국가적 과제는 혁명의 확산이 아니라 경제발전을 핵심으로 하는 사회주의 체제 건설을 안정적인 국제환경 속에서 성공적으로 추진해 나가는 것에 있었다. 따라서 중국의 외교정책은 이념과 현실의 괴리 속에서 항시적으로 충돌하였고, 중국이 처한 국내외적 조건과 상황으로부터 영향을 받을 수밖에 없었으며, 결과론적으로 신중국 수립 이후의 중공은 ‘혁명정당’ 시기 지냈던 혁명성을 그대로 유지할 수 없었다. 본고는 이러한 문제의식 하에 중국의 외교 노선과 정책의 특징을 살펴보고, 중국의 북한과 베트남 정책에서 드러나는 중국외교의 혁명성과 국내 사회주의 체제건설을 위한 국제환경의 안정 추구 간의 길항관계를 논하였다. This paper examines China’s policies toward North Korea and Vietnam, both of which are major socialist countries around China, over the following two periods: the period from the establishment of the People’s Republic of China (PRC) in 1949 to the Geneva Conference of 1954; and the period from 1960 to 1964, when the United States was directly involved in the Vietnam War. China’s support and intervention in North Korea and Vietnam during these two periods can be evaluated as a faithful fulfillment of its internationalist obligations for the revolutionary forces in Asia. However, it is not tenable to interpret China’s policies toward North Korea and Vietnam only as a result of the revolutionary principles of the Chinese Communist Party (CCP). The success of the Chinese revolution and the establishment of the PRC meant that the CCP went from being a ‘revolutionary party’ to becoming a ‘ruling party’. This meant that the greatest national task facing the CCP regime was not the advancement of the revolution but rather the successful establishment of a socialist system centered on economic development in a stable international environment. Therefore, China’s foreign policy constantly oscillated between ideology and reality, and was inevitably affected by the domestic and foreign conditions and circumstances that China was facing. As a result, after the establishment of the PRC, the CCP could not maintain the revolutionary character from its days as the ‘revolutionary party’. Based on this perception, this paper examines the characteristics of China’s diplomatic paths and policies, and discusses the antagonistic relationship between the revolutionary character of the PRC’s diplomacy regarding North Korea and Vietnam and the pursuit of stability in the international environment for the establishment of a domestic socialist system.

The E-Commerce and Global Value Chains

( Sangjun Yea ),( Seungrae Lee ) 대외경제정책연구원 2023 World Economy Brief Vol.23 No.34

A Variable Temperature Walters Spiral Probe for the Critical Current Measurement of Superconducting Strands

Sangjun Oh,Chulhee Lee,Heekyung Choi,Kyungmo Moon,Keeman Kim,Jiman Kim,Pyeong-Yeol Park IEEE 2008 IEEE transactions on applied superconductivity Vol.18 No.2

<P>We have developed a probe for the critical current measurements of low temperature superconducting strands at various field, temperature and strain. A 30 cm-long strand sample is soldered on a Walters spiral made of beryllium copper alloy and compressive or tensile axial strain can be applied up to 0.7%. Temperature control ability was tested using a MgB<SUB>2</SUB> wire up to 30 K. Three cernox sensors are attached on a spiral adjacent to the strand and the temperature of the spiral is controlled within plusmn50 mK of target temperature during the critical current measurement up to 80 A. Extensive critical current measurements have been carried out for an internal-tin processed Nb<SUB>3</SUB>Sn strand. It was found that the measured field, temperature and strain dependence of the critical current for the internal-tin Nb<SUB>3</SUB>Sn strand is in agreement with the recent scaling law based on strong coupling theory of superconductivity.</P>

Derivation and Comparison of Preliminary Derivation Concentration Guideline Level (DCGL) According to Scenarios of Kori Unit 1 Using RESRAD-BUILD

SangJune Park,Pusan National University,Seokyoung Ahn 한국방사성폐기물학회 2019 한국방사성폐기물학회 학술논문요약집 Vol.2019 No.05

Cranial Vena Cava Syndrome in a Retriever Dog Receiving CPN through Central Venous Catheter

Sangjun Oh,Jinsu Kang,Bumseok Kim,Nam Soo Kim,허수영 한국임상수의학회 2022 한국임상수의학회지 Vol.39 No.5

A 5-year-old castrated male Golden Retriever dog weighing 15 kg presented with evidence of intestinal intussusception. The patient had cachexia and severe dehydration before being referred to our department. Ultrasound imaging revealed a target sign indicative of intestinal intussusception. Emergen- cy surgery was performed shortly after diagnosis. After a successful surgery, the patient was hospitalised for postoperative care. Initial treatment was aimed at the reversion of dehydration and the provision of adequate nutrition. Fluid ther- apy and central parenteral nutrition were administered via the peripheral and central venous catheters, respectively. Ten days postoperatively, swelling and edema were observed in the head and neck. Ultrasound and computed tomog- raphy confirmed complete blockage of the cranial vena cava due to thrombosis, which consequently obstructed both the left and right jugular veins. For treat- ment, dalteparin and tissue plasminogen activator were administered. However, the patient lost all of its vital function on the daybreak of postoperative day 11. Venous thrombus formation secondary to central parenteral nutrition applica- tion via the central line is a rare but possible complication. Veterinarians who are concerned about taking care of patients receiving CPN through the central line should keep the possibility of venous thrombus formation in mind.

An Information-Theoretic Study for Joint Sparsity Pattern Recovery With Different Sensing Matrices

Sangjun Park,Nam Yul Yu,Heung-No Lee IEEE 2017 IEEE Transactions on Information Theory Vol.63 No.9

<P>In this paper, we study a support set reconstruction problem for multiple measurement vectors (MMV) with different sensing matrices, where the signals of interest are assumed to be jointly sparse and each signal is sampled by its own sensing matrix in the presence of noise. Using mathematical tools, we develop upper and lower bounds of the failure probability of the support set reconstruction in terms of the sparsity, the ambient dimension, the minimum signal-to-noise ratio, the number of measurement vectors, and the number of measurements. These bounds can be used to provide guidelines for determining the system parameters for various compressed sensing applications with noisy MMV with different sensing matrices. Based on the bounds, we develop necessary and sufficient conditions for reliable support set reconstruction. We interpret these conditions to provide theoretical explanations regarding the benefits of taking more measurement vectors. We then compare our sufficient condition with the existing results for noisy MMV with the same sensing matrix. As a result, we show that noisy MMV with different sensing matrices may require fewer measurements for reliable support set reconstruction, under a sublinear sparsity regime in a low noise-level scenario.</P>

New SPICE Modeling for Bias-Dependent Gate-Drain Overlap Capacitance in RF MOSFETs

Sangjun Lee(이상준),Seonghearn Lee(이성현) 대한전자공학회 2015 전자공학회논문지 Vol.52 No.4

기존의 BSIM4 모델과 다이오드를 사용한 BSIM4 Macro 모델의 바이어스 종속 게이트-드레인 오버렙 캐패시턴스 Cgdo 시뮬레이션의 부정확성에 대하여 자세히 분석하였다. 이러한 Macro 모델은 기존의 BSIM4 모델보다 더 정확하지만 선형영역에서 사용될 수 없음을 발견하였다. 기존 모델들의 부정확성을 제거하기 위해서 물리적인 바이어스 종속 Cgdo 모델 방정식을 사용한 새로운 BSIM4 Macro 모델을 제안하였고 전체 바이어스 영역에서 유효함을 입증하였다. The inaccuracy of the bias-dependent gate-drain overlap capacitance Cgdo simulation in original BSIM4 and BSIM4 macro model using a diode is analyzed in detail. It is found that the accuracy of the macro model is better than of the BSIM4. However, the macro model cannot be used in the linear region. In order to remove the inaccuracy of the conventional models, a new BSIM4 macro model with a physical bias-dependent Cgdo equation is proposed and its accuracy is validated in the full bias range.

Accurate RF C-V Method to Extract Effective Channel Length and Parasitic Capacitance of Deep-Submicron LDD MOSFETs

Sangjun Lee,Seonghearn Lee 대한전자공학회 2015 Journal of semiconductor technology and science Vol.15 No.6

A new paired gate-source voltage RF capacitance-voltage (C-V) method of extracting the effective channel length and parasitic capacitance using the intersection between two closely spaced linear regression lines of the gate capacitance versus gate length measured from S-parameters is proposed to remove errors from conventional C-V methods. Physically verified results are obtained at the gatesource voltage range where the slope of the gate capacitance versus gate-source voltage is maximized in the inversion region. The accuracy of this method is demonstrated by finding extracted value corresponding to the metallurgical channel length.

A Study on the Temperature Dependence of the Ginzburg-Landau Parameter, Thermodynamic and Upper Critical Field of <tex> ${\rm Nb}_{3}{\rm Sn}$</tex> Strands

Sangjun Oh,Oh, D.K.,Bae, C.J.,Kim, H.C.,Keeman Kim Institute of Electrical and Electronics Engineers 2007 IEEE transactions on applied superconductivity Vol.17 No.2

<P>We report detailed magnetization measurement results for two internal-tin Nb<SUB>3</SUB>Sn strands. The paramagnetic background of a Mitsubishi strand is about 4 times larger than that of a KAT strand below the transition temperature, which can be understood as combined effects of Pauli and Langevin paramagnetism. From magnetic relaxation measurement for the KAT strand, a possibility of surface barrier effect is discussed. After subtracting the paramagnetic background, reversible magnetization data are analysed using the Hao-Clem model and the Ginzburg-Landau parameters (kappa), the thermodynamic and the upper critical fields (B<SUB>c</SUB>,B<SUB>c2</SUB>) at various temperatures are obtained. The temperature dependences of kappa, B<SUB>c</SUB> and B<SUB>c2</SUB> are compared with the recent theoretical calculation results for Nb<SUB>3</SUB>Sn and also with widely used empirical formulas.</P>