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DIP 및 BTMP 혼합비율에 따른 인쇄용지의 LCCO<sub>2</sub> 분석
서진호,김형진,정성현,박광호,Seo, Jin Ho,Kim, Hyoung Jin,Chung, Sung Hyun,Park, Kwang Ho 한국펄프종이공학회 2013 펄프.종이技術 Vol.45 No.2
Recently, there are growing interests on carbon emissions related in climate change which is worldwide emerging important issue. Some research works are now carrying out in order to reduce the carbon emission in pulp and paper industries by the synthesis of precipitated calcium carbonate using the exhaust carbon dioxide from combustion furnace or incinerator. However, for solving the original problems on carbon emission, we need to consider the analysis of basic methodology on $CO_2$ through the process efficiencies. There are two general tools for carbon emissions; one is the greenhouse gas inventory and the other is $LCCO_2$ method which is applied to particular items of raw materials and utilities in unit process. In this study, the carbon emissions in wood-containing printing paper production line were calculated by using $LCCO_2$ method. The general materials and utilities for paper production, such as fibrous materials, chemical additives, electric power, steam, and industrial water were analyzed. As the results, $Na_2SiO_3$ showed the highest loads in carbon emissions, and the total amount of carbon emissions was the highest in electricity. In the production line of printing paper using de-inked pulp and BTMP, as the mixing ratio of DIP was higher, the carbon emissions were decreased because of high use of electric power in TMP process.
결함 어골도 분석에 의한 모바일 결제 시스템의 보안성 개선에 관한 연구
서진호,박만곤 한국멀티미디어학회 2018 멀티미디어학회논문지 Vol.21 No.1
As financial transactions using mobile devices have been activated, mobile payment services have appeared and many changes have been made to the existing financial service methods. Due to the simplified payment method of mobile payment service, security threats such as personal information leakage, phishing damage, and malicious code are increasing. Research that can solve this is needed. In this paper, we discuss the features and security factors of mobile payment system. In order to improve the security of mobile payment system, we propose a fault analysis method based on frequency of occurrence using Fault Fishbone Analysis(FFA) technique.
서진호,김문경,정형모,김용식 한국펄프·종이공학회 2019 펄프.종이기술 Vol.51 No.4
In this study, we have synthesized a lignin/polyaniline composite using a typical conductive polymer as a high value-added biomaterial. Further, the morphological characteristics as well as the chemical and electrochemical properties of the lignin/polyaniline composite were evaluated. The morphological analysis of the composite denoted that polyaniline particles, smaller than the lignin particles, formed near the surface of the lignin particles. In addition, FT-IR (Fourier-transform infrared spectroscopy) analysis of the composite revealed that the intrinsic peaks corresponding to lignin considerably reduced or even disappeared and that the lignin/polyaniline interaction occurred because of the shifting of the main polyaniline peaks. Although the electrochemical properties of lignin were considerably poor, the composite exhibited good characteristics. In particular, the capacitance of lignin, lignin/polyaniline composite, and pure polyaniline were 1.52, 131.75, and 214.44 mF·cm-2, i.e., the capacitance of the composite was lower than that of pure polyaniline but considerably higher than that of lignin. Because the lignin content in the composite was approximately 55%, the resulting capacitance was considered to be good.
Left-Sided Cisterna Chyli: a Case Report on a Rare Normal Anatomic Structure
서진호,황정아,신형철,김승수,박찬호,이형남 대한자기공명의과학회 2019 Investigative Magnetic Resonance Imaging Vol.23 No.3
The cisterna chyli, a dilated lymphatic sac in the retrocrural space, is usually located to the right of the aorta. We report a case of a left-sided cisterna chyli, which was incidentally detected on the radiologic examinations of a preoperative workup for cholangiocarcinoma. Computed tomography (CT) and magnetic resonance (MR) images revealed a cisterna chyli measuring 2.5 cm in length in the left retrocrural space. The dilated lumbar lymphatics joined with the cisterna chyli, which was continuous with the left-sided thoracic duct. To the best of our knowledge, this is the second antemortem case of a left-sided cisterna chyli in literature. The cisterna chyli can mimic retrocrural lymphadenopathy, solid tumor with cystic degeneration, abscess or hematoma. The left-sided cisterna chyli should be referred to as a structure so as to be cautious in surgical approach.
서진호,이동진,이명구,오덕환 한국펄프·종이공학회 2015 펄프.종이기술 Vol.38 No.1
Wet-tissue has been used for baby wipe, cleansing pads, industrial wipes, pain relief, personal hygiene, pet care, and healthcare at home, care facilities, restaurant, and hospital. Raw materials of wet-tissue are mainly natural fibers and synthetic fibers such as cotton, rayon, PET (polyethylene terephthalate) and so on. In this study, electrolytic water of NaCl solution was used as fluid in wet-tissue, and the effect of raw materials on antibacterial rate of wet-tissue was investigated. Rayon (100%) showed an excellent antibacterial rate compared with cotton (100%) and rayon:PET (50:50). Antibacterial rate increased as Cl concentration of electrolytic water increased. Absorption of rayon:PET (50:50) was uneven and antibacterial rate of wet-tissue slightly increased by increase of Cl concentration. Antibacterial rate of wet-tissue was 100% under the conditions of more than 1.5 mL of electrolytic water dosage, and dropped under 50% after storage period of 48 hours.