http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Industrial Trends of 3D Printing Technology
Park, Sehwan,Park, Jongkyu The International Promotion Agency of Culture Tech 2013 International Journal of Advanced Culture Technolo Vol.1 No.1
The basic principle of the product manufacturing technology using the 3D printing technique materializes the material including the high molecular substance or plastic and metallic dust, and etc. the product into the laminate additive manufacturing according to the design diagram gradually. It is applied to the various industrial field including the field of food division, field of home appliances, field of medicine, field of mechanical department and construction, etc.. The global development case of 3D printing technique is the next. This study described global technology and market trends. Afterward, 3D printing technique manages the important role when it exceeds the product manufacturing view just and is grafted with the various technology including the biotechnology, nanotechnology, and etc. and it improves the quality of the human life.
HTML5-based Web TV Industry Trends
Park, Sehwan,Kim, Jungho,Yu, Daesang,Park, Jongkyu The Institute of Internet 2013 International Journal of Internet, Broadcasting an Vol.5 No.2
The web service companies develop the App support technique of the HTML5 base in the smart media system and smart TV competitively while the Web platform of the HTML5 base is legislated with the next generation national standard. It is essential to the web kernel, which is the common library of the operating system including the file, window, resource and network management is provided in order to support the various app developments of the HTML5 base effectually. Additionally, the web application program can support UI/UX function of the desktop user using the web browser and JavaScript drive and administration, window management function, and etc. is needed.
The petrology of a gabbroic inclusion from Dokdo Island
Jongkyu Park,Yun-Deuk Jang 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
How much magmatic information on plutonism and associated volcanism can be extracted from a small plutonic inclusion? In this case study, we used a gabbroic inclusion (i.e., phlogopite-bearing orthocumulate) from Dokdo Island, located at the central-western part of the East Sea back-arc basin. Whole-rock compositions suggest that the orthocumulate has been fractionated from an alkaline OIB-type magma sharing a common parent with the volcanism of this island. The textural and chemical characteristics of the orthocumulate minerals indicate that the gabbroic magma has evolved through a monotonous and dominant fractional crystallization of Ti-rich clinopyroxene ± phlogopite. Using mineral-melt equilibrium, clinopyroxene-based thermobarometers, and hygrometers, we estimated a plumbing condition of mafic alkaline magma of Dokdo Island: An intermediately evolved (i.e., Mg# = ~50) hydrous (~1.64 wt% H₂O) alkaline basaltic magma of ~1150 ±27℃ at ~1.53 ±2.6 kbar. In addition, a comparison of the basaltic plumbing systems of the adjacent Neogene volcanic islands highlights a discrepancy in storage depth, which alludes to the role of inherited crustal structures during their ascent.
An Assessment of Structural Reforms in Korea: Implications for Economic Revival in Japan
Jongkyu Park,Yoon Je Cho 서울대학교 경제연구소 2003 Seoul journal of economics Vol.16 No.2
Prior to the economic crisis, realestate prices, wage rates, interest rates, and the exchange rate had been derailed on a large scale from the levels reflective of Korea's economic fundamentals, This distortion was the ultimate source of Korea's economic crisis but was remedied only partially during the last five years, leaving the task of economic reform as incomplete. Although a consensus view about the fundamental source of Japan's economic problems has not yet emerged, a chronology of Japan's lost decade casts doubts about the popular view that financial reform is the sufficient condition for a durable recovery in Japan, We suggest that Japan's effort should be directed to improving productivity of nontradable service sector and to solving the problem of population aging.
Spatiotemporal Distribution of Dissolved Heavy Metals in Gyeonggi Bay, Korea
Sojung Park,최만식,Dongjun Jang,조동진,Kyunggue Park,Hyojin Lee,Junsik Woo,Taeha Kim,Jongkyu Park 한국해양과학기술원 2020 Ocean science journal Vol.55 No.1
In this study, we investigated the spatial and temporal distribution of heavy metals and nutrients in Gyeonggi Bay, Korea, to determine their present status and seasonal variability, and to identify their sources. Two surveys (May and August 2017) covering the entire Gyeonggi Bay (15 sites) and twelve surveys over four seasons (February, May, August, and November of 2016–2018) covering the Incheon Special Management Area (7 sites) were carried out to collect surface seawaters. Three surveys (January, April, and August of 2015) were also performed to collect seawater samples at Shihwa Lake (16 sites). Although the concentration gradients of nutrient type heavy metals (e.g. copper, nickel, zinc, and cadmium) corresponded to patterns of salinity in both dry and wet seasons, there was little seasonal variability over the three years studied. However, there was evidence that heavy metals were released during mixing with freshwaters in the wet season, likely from river outflow or direct coastal inputs such as effluents from Shihwa Lake. For nutrients, whereas the conservative mixing of dissolved inorganic nitrogen and the release of dissolved inorganic phosphate and dissolved silica were observed in the wet season, the concentrations of organic particles (e.g., chlorophyll-a, particulate organic carbon, and particulate organic nitrogen) had an inverse relationship with salinity in the dry season (May). Scavenged metals (e.g., manganese and cobalt) had non-freshwater coastal sources, such as benthic remobilization from suboxic sediments, and exhibited seasonal variation; they progressively increased in concentration from winter to spring and summer, and dropped to their minimum levels in the fall, which was presumably related to variation in microbial activity in sediments. Based on their relationship with salinity, heavy metals were deduced to be derived from coastal sources such as effluents from Shihwa Lake and freshwater from the Han River.