• 한국항공운항학회지
• /
• 제19권4호
• /
• pp.111-116
• /
• 2011

Incheon International Airport is becoming a hub in the Northeast Asia region since its opening in 2001. Along with an increasing volume of air traffic, demands for airspace are also increasing significantly. In particular, air traffic delays have been growing rapidly due to an increasing volume of air traffic, specially flying to Europe through China. And therefore, there should be an alternative protocol to prevent flight delays. The main purpose of this study is to review current West Sea Airways of G597/Y64 which contains highly potential problems and to evaluate the efficacy of double-tracked airways in the west sea area.

• 자원리싸이클링
• /
• 제14권1호
• /
• pp.64-71
• /
• 2005

전 세계의 IT시장 경기침체에도 불구하고 연 25%라는 성장을 보이고 있는 나라 중국은 경제개방 이후 꾸준한 경제성장을 이룩한 이래 2002년 취임한 후진타오 주석의 경제 방침에 따라 IT분야는 급속도로 발전하고 있다. 이러한 발전은 중국의 세계에서의 역량을 과시하는데는 부족함이 없지만, 중국 내에서는 적지않은 부작용이 있는 것도 사실이다. 그 중에서도 동,서간의 발전 불균형이 중국의 전체적인 발전에 큰 걸림돌이 되고 있고, 중국정부는 그 해결책으로 서부 대 개발을 내세워 그 격차를 줄여보고자 노력하고 있다. 서부 대 개발을 추진하는 과정에서, 2000년부터 내수시장 진출을 제한하던 관련법을 폐지함으로써 이제 우리나라도 다른 선진국들과 동일한 출발선상에서 중국의 서부지역에 진출할 기회를 확보하였다. 이와 같은 현실을 바탕에 두고 중국의 전체적인 IT산업현황 및 정책을 이해하고 서부지역의 상황을 알아봄으로써 우리가 나아가야 할 방향을 알아본다.

• Asian Pacific Journal of Cancer Prevention
• /
• 제13권10호
• /
• pp.5003-5006
• /
• 2012

Objective: Yanting County is a high risk area for esophageal cancer (EC) in China. The purpose of this study was to describe the mortality and mortality change of EC from 2004 to 2009 in Yanting County. Methods: EC mortality data from 2004 to 2009 obtained from the Cancer Registry in Yanting were analyzed. Annual percentage changes (APC) were calculated to assess the trends in EC mortality. Age-standardized mortality was calculated based on world standard population of 2000. Results: The average EC mortality was 54.7/$10^5$ in males and 31.6/$10^5$ in females over the 6 years. A decline in EC mortality with time was observed in both genders, with a rate of -8.70% per year (95% CI: -13.23%~-3.93%) in females and -4.11% per year (95%CI: -11.16%~3.50%) in males. Conclusion: EC mortality decreased over the six years in both genders, although it remained high in the Yanting area. There is still a need to carry out studies of risk factors for improved cancer prevention and further reduction in the disease burden.

• Korean Journal of Radiology
• /
• 제24권7호
• /
• pp.668-680
• /
• 2023

Objective: To compare multiparametric magnetic resonance imaging (MRI) features of intraductal carcinoma of the prostate (IDC-P) with those of prostatic acinar adenocarcinoma (PAC) and develop prediction models to distinguish IDC-P from PAC and IDC-P with a high proportion (IDC ≥ 10%, hpIDC-P) from IDC-P with a low proportion (IDC < 10%, lpIDC-P) and PAC. Materials and Methods: One hundred and six patients with hpIDC-P, 105 with lpIDC-P and 168 with PAC, who underwent pretreatment multiparametric MRI between January 2015 and December 2020 were included in this study. Imaging parameters, including invasiveness and metastasis, were evaluated and compared between the PAC and IDC-P groups as well as between the hpIDC-P and lpIDC-P subgroups. Nomograms for distinguishing IDC-P from PAC, and hpIDC-P from lpIDC-P and PAC, were made using multivariable logistic regression analysis. The discrimination performance of the models was assessed using the receiver operating characteristic area under the curve (ROC-AUC) in the sample, where the models were derived from without an independent validation sample. Results: The tumor diameter was larger and invasive and metastatic features were more common in the IDC-P than in the PAC group (P < 0.001). The distribution of extraprostatic extension (EPE) and pelvic lymphadenopathy was even greater, and the apparent diffusion coefficient (ADC) ratio was lower in the hpIDC-P than in the lpIDC-P group (P < 0.05). The ROC-AUCs of the stepwise models based solely on imaging features for distinguishing IDC-P from PAC and hpIDC-P from lpIDC-P and PAC were 0.797 (95% confidence interval, 0.750-0.843) and 0.777 (0.727-0.827), respectively. Conclusion: IDC-P was more likely to be larger, more invasive, and more metastatic, with obviously restricted diffusion. EPE, pelvic lymphadenopathy, and a lower ADC ratio were more likely to occur in hpIDC-P, and were also the most useful variables in both nomograms for predicting IDC-P and hpIDC-P.

• Proceedings of the National Institute of Ecology of the Republic of Korea
• /
• 제5권2호
• /
• pp.37-42
• /
• 2024

This study used a GPS tracker to determine characteristics of wintering habitat use by black-tailed gulls on the west coast of Korea. Results of this study showed a southward movement in December and a northward movement in March. The wintering habitat was confirmed to include the southwest coastal island area (Group 1), the inland coastal area (Group 2), and China (Group 3). The wintering home range was the narrowest in October and the widest in December. Home range of Group 1 was increased from November, showing the maximum in December, decreased in February, and then tended to increase again in March. Group 2 showed the widest home range in November and a narrow range of home range from December. Home range of Group 3 showed a mixed pattern of group 1 and group 2. The flight rate was the lowest in January and the highest in March. Day and night flight rates showed significant differences by month. This study identified wintering characteristics of the West Coast population of black-tailed gulls on the West Coast, including their wintering areas, migration periods, and use patterns. These wintering characteristics of black-tailed gull in the west coast area are thought to be affected by environmental factors (such as food resources and fishing activities) and geographical characteristics of the West Coast where many islands are distributed.

• 자원ㆍ환경경제연구
• /
• 제10권4호
• /
• pp.591-617
• /
• 2001

For the past years, there had been some environmental cooperation among East Asian countries to reduce air pollution emissions from China. However, the progress of cooperation has been under developed because of lacking financial support, poor design of planning, and weak economic incentives for the industries. In this paper, some practical approaches have been suggested. First, electric trade to make Asian Grid among countries will be good alternatives for the fossil fuel, such as coal, for China. Secondly, natural gas pipeline from West China to Siberian pipeline would change the whole energy mix in this area around 2010, Therefore, it is very promising area for the energy industries to involve in gas project and get rid of many institutional barriers from China. Lastly, environmental industry is growing fast in East Asian. In China, waste treatment and management, air pollution control, and water quality management are some promising areas for the future. Hence it is desirable for Korea, Japan and China to make a eco-fund or company to boost up environmental technology as well as environmental market size.

• 천문학회지
• /
• 제38권2호
• /
• pp.113-116
• /
• 2005

The program of site survey in western China has been initiated by the National Astronomical Observatories of China(NAOC) toward large telescope facilities. The program is carried out in aspects of remote studies and local surveys. The preliminary results show that the eastern Pamirs and Ali area in Tibet may be the best candidates for further monitoring. The site survey group of NAOC will proceed to set up site testing stations on the selected sites and perform monitoring and campaign in 2005.

• 한국초전도ㆍ저온공학회논문지
• /
• 제17권1호
• /
• pp.1-5
• /
• 2015

With the increasing development of renewable energy, it is expected that large-scale renewable power would be transported from the west and north area of China to the east and south area. For this reason, it will be necessary to develop a wide-area power grid in which the renewable energy would be the dominant power source, and the power grid will be faced by some critical challenges such as long-distance large-capacity power transmission, the stability of the wide-area power grid and the land use problem for the power grid. The superconducting technology for power (STP) would be a possible alternative for the development of China's future power grid. In last decade, STP has been extensively developed in China. In this paper, we present an overview of the R&D of STP last decade in China including: 1) the development of high temperature superconducting (HTS) materials, 2) DC power cables, 3) superconducting power substations, 4) fault current limiters and 5) superconducting magnetic energy storage (SMES).

• Environmental Engineering Research
• /
• 제25권4호
• /
• pp.536-544
• /
• 2020

To address organic dye wastewater, economic and effective adsorbents are required. Here, magnetic biochar from alkali-activated rice straw (AMBC) was successfully synthesized using one-step magnetization and carbonization method. The alkaline activation caused the large specific surface area, high pore volume and abundant oxygen-containing groups of the AMBC, and the magnetization gave the AMBC a certain degree of electropositivity and fast equilibrium characteristics. These characteristics collectively contributed to a relative high adsorption capacity of 53.66 mg g^-1 for this adsorbent towards rhodamine B (RhB). In brief, RhB can spontaneously adsorb onto the heterogeneous surface of the AMBC and reach the equilibrium in 60 min. Although the initial pH, ionic strength and other substances of the solution affected the adsorption performance of the AMBC, it could be easily regenerated and reused with considerable adsorption content. Based on the results, H-bonds, π-π stacking and electrostatic interactions were speculated as the primary mechanisms for RhB adsorption onto the AMBC, which was also demonstrated by the FTIR analysis. With the advantageous features of low cost, easy separation, considerable adsorption capacity and favorable stability and reusability, the AMBC would be a potential adsorbent for removing organic dyes from wastewater.

• 한국자원리싸이클링학회:학술대회논문집
• /
• 한국자원리싸이클링학회 2004년도 13회 산화철워크샵
• /
• pp.35-42
• /
• 2004

전 세계의 IT시장 경기침체에도 불구하고 연 $25\%$라는 성장을 보이고 있는 나라 중국은 경제개방 이후 꾸준한 경제성장을 이룩한 이래 2002년 취임한 후진타오 주석의 경제 방침에 따라 IT분야는 급속도로 발전하고 있다. 이러한 발전은 중국의 세계에서의 역량을 과시하는데는 부족함이 없지만, 중국 내에서는 적지 않은 부작용이 있는 것도 사실이다. 그 중에서도 동$\cdot$서간의 발전 불균형이 중국의 전체적인 발전에 큰 걸림돌이 되고 있고, 중국정부는 그 해결책으로 서부 대 개발을 내세워 그 격차를 줄여보고자 노력하고 있다. 서부 대 개발을 추진하는 과정에서, 2000년부터 내수시장 진출을 제한하던 관련법을 폐지함으로써 이제 우리나라도 다른 선진국들과 동일한 출발선상에서 중국의 서부지역에 진출할 기회를 확보하였다. 이와 같은 현실을 바탕에 두고 중국의 전체적인 IT산업현황 및 정책을 이해하고 서부지역의 상황을 알아봄으로써 우리가 나아가야 할 방향을 알아본다.