• Journal of the Korean Society of Costume
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• v.55 no.5 s.95
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• pp.1-13
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• 2005

The results from the consideration of this are as follows. 1. Kokuryo has been the exchange foreign relationship with the Han dynasty era, from king DaiMuSin 25 years to Bojang 27 years. 2 King of Kokuryo, from The North-Wei-dynasty has been received ceremonial costumes, first-third class of China's official rank. After unification of China, Su, Dang dynasty's envoy and missionary and many commercial men and artist come from China to Kokuryo, therefore, influenced their costume habbits and behabiers from royal families costumes and common peoples costumes, without concern of that one's social position. 3. Kokuryo King's ceremonial costumes are not the same as the China. Kokuryo performed a religious service an emperor's ceremony. And the Kokuryo King's religious mind was the Budism and Daoism. So that mural painting just showing the symbolic of the king's costumes , Myunryukwanbok.

• Journal of the Korean Society of Clothing and Textiles
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• v.36 no.8
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• pp.885-899
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• 2012

This study investigates the competitiveness of the clothing and textile industry in North Korea, compare to those of China, Hong Kong, India, Indonesia, Japan, South Korea, Thailand, and Vietnam from 1993 to 2010; in addition, it explores the potential cooperation between South Korea and North Korea. First, a revealed comparative advantage (RCA) was used to investigate the competitive performance of clothing and textile industry in North Korea. The results reveal that North Korea and Viet Nam had superior comparative advantages from 1993 to 2010. Second, in order to investigate the factors that affect the competitive performance, depth interviews based on Porter's Diamond of Competitive Advantage were designed and completed by government officers and practitioners working in the clothing and textile industry field. The results show that cheap labor, the stable demand of South Korea and China for basic products, lack of supporting and related industries, and organizational power highly influence the competitive performance of clothing and textile in North Korea. This result provides insight into the potential and limitations of the clothing and textile business. In addition, this study provides a better understanding of the effects of inter-Korean economic cooperation in socialist states.

• Journal of architectural history
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• v.24 no.2
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• pp.35-44
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• 2015

The purpose of this study is its residential spaces through the analysis of exterior space and interior space at Wu-lin Village(烏林屯) in Jiao-he, China. The method of this study is to search for documentation, interview, residents, make a survey of these villages about immigration history, surroundings, topographical keynotes, administration system, residential number, residential style, site composition, etc. The residents moved from Yen-bien and Jiao-he in China etc. The ancestor moved from North of Gyeong-Sang Province in South of Korea, North of Ham-Gyeong Province in North of Korea etc. The main road divides the village into two parts: the north quarter, Wu-lin Village, typified by the Chinese house, and the south quarter, You-Yi Village(友誼村), typified by the Korean-Chinese house. The houses is compose of main building and an accessory building. The main building looking south. The vegetable garden is around main buildings. The main building is compose of an On-dol room(a hot-floored room) and a kitchen, a corridor etc.

• Journal of Korean Society for Atmospheric Environment
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• v.9 no.4
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• pp.329-339
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• 1993

Due to the global-convection currents, transboundary transport of air pollutants is widely observed in many regions of the world. This study was carried out to investigate the pattern of long-range transport of air pollutants in North East Asia, especially the impact of air pollutants originated in China and Japan on the air quality in Korea. From the meteorological data at the 850 mb surface from May 1986 through April 1987 at 54 obsevation stations in the North East Asia region, the backward and forward trajectories were calculated using interpolation method. And the contributions of pollution sources in neighbor countries to the air quality in Korea were analyzed. It was concluded that air pollution in China had a great influence on the air quality in Korea throughout the year : it could be transported to Korea just within 2 or 3 days most of the time. The trajectory analysis showed that pollution sources in Beijing. Liaoning Province, and Shandong Province, the most heavily industrialized areas in China., were the most influential for the air quality in Korea except for summer season. Durnig summer season, the air pollution in Shanhai and Japan could have moer influence on Korea. Such transboundary transport of air pollutants necessitate international cowork and cooperation in the region of North East Asia.

• Journal of Species Research
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• v.6 no.2
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• pp.195-205
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• 2017

Zubovskya morii (Bey-Bienko, 1931) was rediscovered from its type locality, Mount Baekdusan, from materials collected by Bulgarian zoological expeditions to North Korea in the 1970s. This grasshopper species is endemic to North Korea and for the past 85 years was known only from a single holotype male. In the present study we describe the female Z. morii for the first time. A revised checklist of Orthoptera at Mount Baekdusan (also known as Changbaishan in China) is also provided. A new synonymy, Zubovskya longifurcula (Jin et al., 2011), syn. nov. for Zubovskya koreana Mistshenko, 1952 is proposed here.

• Economic and Environmental Geology
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• v.28 no.6
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• pp.559-569
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• 1995

Paleomagnetic data have been obtained from the Upper Carboniferous-Permian Komok and Cheolam Groups which are exposed in the E-W trending Baekunsan syncline comprising the Pyongan Supergroup in eastern Korea. Two ancient components of magnetization are recovered in these groups by detailed thermal demagnetization: a post-folding component and a pre-folding component. The post-folding component $(D/I=54.0/54.6^{\circ},\;{\alpha}_{95}=14.6^{\circ})$ is a magnetic signature of the Oaebo Orogeny and appears to have been confined mainly to Cretaceous Normal Superchron. It has been rotated clockwise since this magnetization has been acquired. The pre-folding components ($D/I=341/-9.2^{\circ},\;{\alpha}_{95}=7.2^{\circ})$, paleopole at $335.7^{\circ}E$, $44.6^{\circ}N$ for Upper Carboniferous; $D/I=358.3/11.5^{\circ},\;{\alpha}_{95}=6.3^{\circ})$, paleopole at $311.9^{\circ}E$, $58.7^{\circ}N$ for Permian) pass fold and reversal tests. These paleopoles correspond only with the contemporaneous poles from the North China Block: they are removed from the poles from the South China Block. If the results of this study are corrected for the clockwise rotation deduced from the prefolding component, the enhanced agreement with North China Block can be achieved. Therefore, a first-order correlation between the Korean Peninsula and North China at least since Upper Paleozoic times is identified in this study.

• Journal of Power Electronics
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• v.15 no.5
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• pp.1367-1379
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• 2015

A hybrid HVDC system that is composed of line commutated converter (LCC) at the rectifier side and voltage source converter (VSC) in series with LCC at the inverter side is studied in this paper. The start-up strategy, DC fault ride-through capability, and fault recovery strategy for the hybrid HVDC system are proposed. The steady state and dynamic performances under start-up, AC fault, and DC fault scenarios are analyzed based on a bipolar hybrid HVDC system. Furthermore, the immunity of the LCC inverter in hybrid HVDC to commutation failure is investigated. The simulation results in PSCAD/EMTDC show that the hybrid HVDC system exhibits favorable steady state and dynamic performances, in particular, low susceptibility to commutation failure, excellent DC fault ride-through, and fast fault recovery capability. Results also indicate that the hybrid HVDC system can be a good alternative for large-capacity power transmission over a long distance byoverhead line.

• Economic and Environmental Geology
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• v.26 no.3
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• pp.383-393
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• 1993

Paleomagnetic data have been obtained from the Lower Triassic Tonggo formation which is exposed in the E-W trending Baekunsan syncline comprising the Pyongan Supergroup in eastern Korea. Two ancient components of magnetization are recovered in this formation by detailed thermal demagnetization: a post-folding component and a pre-folding component The post-folding component ($D/I=58.8/55.5^{\circ}$) is normally magnetized and appears to acquire in the Cretaceous Normal Superchron. It is a magnetic signature of the Daebo Orogeny and has been rotated clockwise since this magnetization has been acquired, in common with the main synclinal axis. The pre-folding component ($D/I=1.1/19.4^{\circ}$, Paleopole at $306.1^{\circ}E$, $63.2^{\circ}N$) passes fold and reversal tests and is inferred to be a post-depositional or early chemical diagenetic remanence of Lower-Middle Triassic age. This paleopole corresponds only with the Lower Triassic poles from the North China Block: it is removed from the contemporary poles from the South China Block. If the result of this study is corrected for the clockwise rotation deduced from the Cretaceous overprint, the enhanced agreement with the Lower Triassic poles from the North China block can be achieved. Therefore, a first order correlation between the Korean Peninsula and North China at least since Lower Triassic times is identified in this study.

• Journal of Electrical Engineering and Technology
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• v.13 no.4
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• pp.1450-1458
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• 2018

Commutation failures can deteriorate the availability of high-voltage direct current (HVDC) links and may lead to outage of the HVDC system. Most commutation failures are caused by voltage reduction due to ac system faults on inverter side. The commutation failure process can be divided into two stages. The first stage, from the occurrence to the clearing of faults, is called 'Deterioration Stage'. The second stage, from the faults clearing to restoring the power system stability, is called 'Recovery Stage'. Based on the analysis of the commutation failure process, this paper proposes a direct-current fuzzy controller including prevention and recovery controller. The prevention controller reduces the direct current to prevent Commutation failures in the 'Deterioration Stage' according to the variation of ac voltage. The recovery controller magnifies the direct current to speed up the recovery of power system in the 'Recovery Stage', based on the recovery of direct voltage. The validity of this proposed fuzzy controller is further proved by simulation with CIGRE HVDC benchmark model in PSCAD/EMTDC. The results show the commutation failures can be mitigated by the proposed direct-current fuzzy controller.

• Nuclear Engineering and Technology
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• v.50 no.7
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• pp.1079-1087
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• 2018

There are many parameters that affect the natural circulation flow, such as height difference, heating power size, pipe diameter, system pressure and inlet temperature and so on. In general analysis the heating power is often regarded as a uniform distribution. The ANSYS-CFX numerical analysis software was used to analyze the flow heat transfer of supercritical water under different heating power distribution conditions. The distribution types of uniform, power increasing, power decreasing and sine function are investigated. Through the analysis, it can be concluded that different power distribution has a great influence on the flow of natural circulation if the total power of heating is constant. It was found that the peak flow of supercritical water natural circulation is maximal when the distribution of heating power is monotonically decreasing, minimal when it is monotonically increasing, and moderate at uniform or the sine type of heating. The simulation results further reveal the supercritical water under different heat transfer conditions on its flow characteristics. It can provide certain theory reference and system design for passive residual heat removal system about supercritical water.