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양지웅,임옥택 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.6
We compared the spray characteristics of a typical fuel (100% diesel, DME) and diesel-DME blended fuel in a constant volume combustionchamber (CVCC). The typical fuel (100% diesel, DME) and diesel-DME blended fuel spray characteristics were investigated atvarious ambient pressures (pressurized nitrogen) and fuel injection pressures using a common rail fuel injection system when the fuelmixture ratio was varied. The fuel injection quantity and spray characteristics were measured including spray shape, penetration length,and spray angle.
오픈소스 플랫폼 기반 대화형 EWS 웹 애플리케이션 개발
양지웅,루스탐존어브 이브로힘,미르잘롤로브 미라보스,이용주 한국디지털융합학회 2024 디지털융합논문지 Vol.10 No.2
The financial early warning system (EWS) aims to prevent financial crises by assessing and managing potential risks in the financial environment. The EWS in this paper utilizes R program to exclude human subjectivity through statistical techniques and enables efficient work. The existing EWS was based on a stand alone system and had the disadvantages of being difficult to use from a distance and having poor visibility. Therefore, in this paper, to implement a new EWS, dashboard visualization is implemented in a Web server environment using the open source platform such as MySQL DBMS, R program, and Shiny server package.
양지웅,이정일 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.4
The authors report two cases of intramedullary metastasis from breast cancer and melanoma respectively. Both patients presented with rapidly progressing paraparesis. They were treated by laminectomy with microsurgical extirpation of the tumor and whole spine irradiation. The patient with melanoma died at 3 months postoperatively and the other with breast cancer is still alive for 40 months after being diagnosed of spinal cord metastasis. The prognosis of intramedullary spinal cord metastasis is known to be poor, however, early diagnosis and radical surgery before irreversible deterioration of neurologic status can prolong functional survival. Key words:Intramedullary metastasis;Breast cancer;Melanoma.
Polymer-Assisted High-Resolution Printing Techniques for Colloidal Quantum Dots
양지웅,유지수,유원석,최문기 한국고분자학회 2021 Macromolecular Research Vol.29 No.6
Over the last several decades, colloidal quantum dots (QDs) have been widely studied because of their unique optical and electronical properties such as band gap tunability, extremely high color purity, and efficient light absorption and emission. Consequently, they have been regarded as promising materials for nextgeneration optoelectronic devices such as displays, image sensors, and solar cells. Because these devices employ solid state forms of colloidal QD ensembles, the development of the processes that can tailor their 3D architecture is essential. Here, this review article explores the recent progress of the high-resolution printing techniques for colloidal QDs. Specifically, we present a wide range of methods including photolithography, inkjet printing, nanoimprinting, and transfer printing. We also discuss how these printing methods have been inspired by the patterning techniques for polymer-based materials.