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수령독재 하에서 권력과 이권을 둘러싼 갈등 동학 그리고 장성택 숙청
박형중 ( Hyeong Jung Park ),최대석 ( Dae Seok Choe ),김학성 ( Hank Sung Kim ),박영자 ( Young Ja Park ),장인숙 ( In Suk Jang ) 북한연구학회 2014 北韓硏究學會報 Vol.18 No.1
Under the Suryong dictatorship, by definition, there is no political completion for Suryong`s status. There are, however, horizontal competitions to expand power and interest carried out by major power organizations and elites. Apparently they are loyalty competition devoted to the Suryong. During the power succession, as the ruling coalition is reconstructed, they intensify themselves. Two features have been pronounced during the hereditary succession from Kim Jong-il to Kim Jong-un in regard to competition for power and interest among power organizations and elites: the one is the competition for regency, i.e. to advance oneself as the dominant force in the promotion of the power succession; the other is the competition for increasing share of power and interest by power organizations and elites. Jang Sung-taek has stood in the center of these two competitions and he was purge thereof.
단상 유도형 동기 전동기(LSPM)의 특성해석에 관한 연구
정대성,김승주,이진헌,최재학,이주,Jung, Dae-Sung,Kim, Seung-Ju,Lee, Jin-Hun,Choi, Jae-Hak,Lee, Ju 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.3
가전분야에서의 전동기 효율향상을 통한 에너지 소비절감 효과는 상당히 크지만 이를 위한 전동기의 설계/해석 기술 확보가 아직은 미흡한 상태이다. 이에 따라 유도형 동기전동기가 제안되었지만, 유도형 동기 전동기는 유도전동기와 통기전동기의 특성을 동시에 가지고 있어, 해석 및 설계가 쉽지 않다. 따라서 본 논문에서는 기존의 냉장고 압축기용 전동기인 단상유도전동기를 대처할 수 있는 단상 유도형 동기전동기를 이용해 파라미터에 따라 특성이 어떻게 바뀌는가에 대해 서술하였다. 그에 따라 단상유도전동기의 정상상태 특성을 해석하고 제안모델의 성능을 기존모델과 비교하고 실험하여 해석결과의 신뢰성을 검증한다. 또한 본 논문에서는 제안모델의 기존 고정자 형상이나 권선 스팩을 유지하고 회전자의 형상이나 구조만을 변경시켜 성능향상을 도모하였다. 해석방법으로는 전자장 수치 해석적인 방법으로 널리 이용되고 있는 유한요소법(Finite Element Method : FEM)을 이용하였다. Electric motor efficient improvement from home appliance field is important to the effect reducing the energy consumption. But the electric motor design/analysis technology is still insufficient. Specially the electric motor design/analysis technology of satisfying characteristic of both the induction motor and the synchronous motor such as Line start permanent motor. Therefore the electric motor design/analysis technology is urgently demanded reliability. This paper proposes the sing1e-phase line-start permanent magnet motor to develop the motor it with be able to alternate the sing-phase induction motor it is a refrigerator compressor motor. The sing-phase induction motor is analyzed in the steady state. And we have a certification test to compare our single-phase line-start permanent magnet motor with the sing-phase induction motor. In order to improve the performance, the stator of the single-phase line-start permanent magnet motor is same as the stator of the sing-phase induction motor and changes the rotor form and has the permanent magnet. It used the Finite Element Method(FEM) which is widely used with electronic-magnetic field numerical analysis method.
( Dae Hoe Gu ),( Min Seon Park ),( Tae Jung Yun ),( Seok Bae Yoon ),( Sun Young Yim ),( Jin Yong Jung ),( Jin Dong Kim ),( Yeon Seok Seo ),( Hyung Joon Yim ),( Soon Ho Um ),( Ho Sang Ryu ),( Yun Ji Pa 대한간학회 2013 춘·추계 학술대회 (KASL) Vol.2013 No.1
Background: The use of antiviral agent has changed the prognosis of patients with hepatitis B virus (HBV)-related end stage liver disease. In these patients, therefore, a more efficient prognostic model for determining early mortality is necessary to properly select those who require liver transplantation. In this study, we aimed to develop a new prognostic model. Methods: We retrospectively analyzed a total of consecutive 194 patients with decompensated HBV-related liver cirrhosis (≥CTP score 7, ascites, or jaundice) who had initially started antiviral treatment in Korea university Anam hospital. Univariate and multivariate cox-regression modeling was used to develop a model for predicting 6-month mortality Results: The study population was predominantly male (128/194) and median age was 51 years. Antiviral agents were administered for a median of 41 months (lamivudine in 157 patients, entecavir in 37). At baseline 147 and 12 patients had ascites and encephalopathy, respectively, with a mean CTP score of 9. Twenty-one (10.8%) patients died within the first 6 months of treatment. Univariate analysis revealed that baseline variables such as age, the presence of ascites or encephalopathy, serum bilirubin, prothrombin time, albumin, Na, BUN, alkaline phosphatase, and HBV DNA levels were associated with the deaths within 6-months (all P<0.05). Among them serum bilirubin, prothrombin time, HBV DNA levels and age were found to be independent risk factors in multivariate analysis. Using these four risk factors, we developed new scoring system to predict 6-months mortality. This new prediction model showed AUROC of 0.941, higher than those of CTP score and MELD score which were 0.893 and 0.862, respectively. Conclusions: This newly developed prediction model for early mortality will be useful in selecting the candidates of urgent liver transplantation in patients with decompensated HBV-related liver cirrhosis.
Exploration of aging and cancer-dependent genes based on analysis of TCGA RNA-Seq dataset
( Sang Gyun Noh ),( Dae Hyun Kim ),( Hee Jin Jung ),( Su Gyeong Ha ),( Hae-young Chung ) 한국장기요양학회 2018 한국장기요양학회 추계학술대회자료집 Vol.2018 No.-
Aging is a biological phenomenon which is associated with promotion of cancer onset and progression. Therefore, we planned to search for molecular markers that could predict aging and cancer onset using The Cancer Genome Atlas (TCGA), biological database. The RNA-Seq data downloaded from TCGA were categorized according to the sample types, age, and stages of cancer. Differentially expressed genes (DEGs) among the categorized groups were calculated by EBSeq, a program for calculating DEGs. Moreover, calculated DEGs were divided into stages of cancer and were organized by Venn diagram. We obtained 22 genes from intersections between aging and cancer group of the Venn diagrams and their expression levels were confirmed by RT-qPCR. As a result, pro-inflammatory genes, CCL19, CXCL6 and IL36B, and metabolic genes, APOA2 and UGT2A1, were differentially expressed in the aged kidneys, which shows that they were involved in both aging and cancer. In conclusion, our study demonstrates that pro-inflammatory and metabolic genes could be candidate genes to predict aging and cancer in aged kidneys.
RF Power Coupler for the 100-MeV Drift Tube Linac
Dae-Il Kim,Hyeok-Jung Kwon,Han-Sung Kim,Yong-Sub Cho 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.5
A 100-MeV proton linac for the Proton Engineering Frontier Project is under development. It consists of a 50-keV injector, a 3-MeV radio frequency quardruple (RFQ), a 20-MeV drift tube linac (DTL) and a 100-MeV DTL. The RF power generated by a klystron is coupled to the DTL tanks through RF power couplers. RF power couplers of a half-wavelength ridge-loaded waveguide with iris coupling were used in the 20-MeV DTL. For the 100-MeV DTL, we designed a quarter-wavelength coupler because of its small volume and low multipacting threshold value compared with the half-wavelength case. The RF power coupler for the 100-MeV DTL was designed using the SUPERFISH code and a cold model was fabricated to check the characteristics. In this paper, the design of RF power coupler for the 100-MeV DTL is presented and the test results are discussed.