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Heating energy performance and part load ratio characteristics of boiler staging in an office building

Frontiers in Energy 2019年第2期13卷 339-353页

作者： Da Young LEE byeong mo seo Yeo Beom YOON Sung Hyup HONG Jong Min CHOI Kwang Ho LEE Graduate School Hanbat National UniversityDaejeon 305-719South Korea College of Design North Carolina State University RaleighNC 27695-7701USA Department of Mechanical Engineering Hanbat National UniversityDaejeon 305-719South Korea Department of Architectural Engineering Hanbat National UniversityDaejeon 305-719South Korea

Commercial buildings account for significant portions of the total building energy in South Korea and thus a variety of research on the boiler operation related to heating energy in office buildings has been carried out thus far. However, most of the researches have been conducted on the boiler itself, i.e., the part load ratio characteristics and the corresponding gas energy consumption patterns are not analyzed in the existing studies. In this study, the part load ratio and the operating characteristics of gas boiler have been analyzed within an office building equipped with the conventional variable air volume system. In addition, the gas consumption among different boiler staging schemes has been comparatively analyzed. As a result, significant portions of total operating hours, heating load and energy consumption has been found to be in a part load ratio range of 0 through 40% and thus energy consumption is significantly affected by boiler efficiency at low part load conditions. This suggests that boiler operation at the part load is an important factor in commercial buildings. In addition, utilizing sequential boiler staging scheme can save a gas usage of about 7%. For annual heating energy saving, applying the sequential control boiler with a 3:7 proportion staging is considered to be the optimal control algorithm for maximum efficiency of boilers.

关键词： EnergyPlus boiler part load ratio gas con-sumption office building boiler staging

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Successful resolution of gastric perforation caused by a severe complication of pancreatic walled-off necrosis:A case report

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世界临床病例杂志 2023年第26期11卷 6298-6303页

作者： byeong Gwan Noh Myunghee Yoon Young mok Park Hyung-Il seo Suk Kim Seung Baek Hong Jae Kyun Park moon Won Lee Department of Surgery Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Radiology Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Internal Medicine Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea

BACKGROUND Pancreatic walled-off necrosis(WON)rarely causes critical gastric necrosis and perforation,which may develop when pancreatic WON squashes against the *** Atlanta 2012 guidelines were introduced for acute pancreatitis and its related clinical ***,there are few reported cases describing the clinical course and resolution of pancreatic *** SUMMARY We report the case of a 45-year-old man who presented to the urgent emergency department with gastric perforation caused by a severe complication of pancreatic WON on computed *** patient underwent an emergency distal pancreatectomy,splenectomy,and gastric wedge *** findings showed re-perforation of the gastric wall at a previously resected ***,endoscopic examination revealed an ulcerative area with a defect in the *** diagnostic endoscopy,endoscopic vacuum-assisted closure was performed,and continuous suction was transferred over all tissues in contact with the sponge *** patient recovered without any further complications and was discharged in good condition at postoperative week *** recurrence occurred during the 6-mo follow-up *** When managing a patient with serious gastric perforation complicated by pancreatic WON,a multidisciplinary treatment approach should be considered.

关键词： Acute necrotizing pancreatitis Endoscopy Vacuum assisted closure Gastric rupture Surgery Case report

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Flux Optimization During Tapping in BOF Process

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Journal of Iron and Steel Research(International) 2011年第S2期18卷 148-152页

作者： Hyun-seo PARK Sung-mo seo Ji-Tae KWON Joo CHOI Steelmaking Research Group POSCO Technical Research Laboratories 699 Gumho-dong Gwangyang-si Jeonnam 545-090 Korea Technology development team plate rolling department Gwangyang Steelworks POSCO Gumho-dong Gwangyang-si Jeonnam 545-711 Korea

An integrated Plate Mill has started it’s operation on July 7, 2010 in Gwangyang Steelworks, POSCO. The production capability is about 2.5 million tons per year and the main stream consists of Blast Furnace, Hot metal pretreatment (KR), Converter, Bubbling Station, RH/VTD and Continuous Casting. Particularly, it is possible to control sulfur concentration at excellent level in BOF without any further treatment in LF or VTD, which is attained by unique KR process and scrap usage strategy in BOF. In this paper, desulfurization efficiency and steel cleanliness was introduced by optimizing flux amount during tapping in BOF process. In addition, the effect of the flux addition on the refractory of ladle was investigated based on EPMA analyses with the viewpoint of phase diagram. The cleanliness of each sample was examined using optical emission spectrometry and oxygen nitrogen determinator.

关键词： plate mill steel cleanliness flux tapping

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The Arabidopsis Floral Repressor BFT DelaysFlowering by Competing with FT for FD Bindingunder High Salinity

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molecular Plant 2014年第2期7卷 377-387页

作者： Ryu, Jae Yong Lee, Hyo-Jun seo, Pil Joon Jung, Jae-Hoon Ahn, Ji Hoon Park, Chung-mo Department of Chemistry Seoul National University Seoul 151-742 Korea Present address: Department of Chemistry Chonbuk National University Jeonju 561-756 Korea The Sainsbury Laboratory University of Cambridge Cambridge UK Creative Research Initiatives Division of Life Sciences Korea University Seoul 136-701 Korea PGBI Seoul National University Seoul 151-742 Korea

Soil salinity is one of the most serious agricultural problems that significantly reduce crop yields in the aridand semi-arid regions. It influences various phases of plant growth and developmental processes, such as seed germina-tion, leaf and stem growth, and reproductive propagation. Salt stress delays the onset of flowering in many plant spe-cies. We have previously reported that the Arabidopsis BROTHER OF FT AND TFL1 （BFT） acts as a floral repressor undersalt stress. However, the molecular mechanisms underlying the BFT function in the salt regulation of flowering inductionis unknown. In this work, we found that BFT delays flowering under high salinity by competing with FLOWERING LOCUST （FT） for binding to the FD transcription factor. The flowering time of FD-deficient fd-2 mutant was insensitive to highsalinity. BFT interacts with FD in the nucleus via the C-terminal domain of FD, which is also required for the interactionof FD with FT, and interferes with the FT-FD interaction. These observations indicate that BFT constitutes a distinct saltstress signaling pathway that modulates the function of the FT-FD module and possibly provides an adaptation strategythat fine-tunes photoperiodic flowering under high salinity.

关键词： Arabidopsis BFT FD flowering time FT salt stress

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Efficacy of Saam acupuncture treatment on improvement of immune cell numbers in cancer patients:a pilot study

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Journal of Traditional Chinese Medicine 2014年第5期34卷 550-554页

作者： Dae-Joon Kim seong-Hoon Park Jung-Chul seo Kyung Soon Kim Ki Cheul Sohn Im Hee Shin Hun mo Ryoo Department of Internal Medicine Oriental Medical HospitalDaegu Haany UniversityDaegu 730-090Korea Department of Research Comprehensive and Integrative Medicine InstituteDaegu 705-030Korea Department of Preventive Medicine Hospital of Catholic University of DaeguDaegu 705-718Korea Department of Medical Statistics School of MedicineCatholic University of DaeguDaegu 705-718Korea Department of Internal Medicine School of MedicineCatholic University of DaeguDaegu 705-718Korea

OBJECTIVE: To collect preliminary data on the effects of Saam acupuncture with regard to the immunity in cancer ***: Ten cancer patients were analyzed for improvements in immunity. Acupuncture was applied at the 5 acupuncture points, Jingqu(LU 8), Zutonggu(BL 66), Yanggu(SI 5), Yangchi(TE 4), and Zhongwan(CV 12) for 2 weeks with 4 sessions. We assessed the effect of Korean Saam acupuncture on the immune system in cancer patients by measuring particular blood cell subsets, including CD3 +,CD4+, CD8+, CD19+, and CD56+ cells, as well as total white blood cell count, absolute neutrophil count, and fatigue score. The measurement was performed before and after acupuncture and at a 2-week ***: There was a statistically significant increase in the number of CD3+(P=0.023) and CD8+ cells(P<0.001) and T-cell subsets, as well as a decrease in the fatigue severity scale(FSS) score(P=0.001) after Saam acupuncture using the 5 ***: Acupuncture may improve the immune system by increasing the counts of a few immune cells and relieve fatigue in cancer patients by decreasing FSS scores. Although this was a non-controlled study, it constitutes preliminary research investigating the potential effects of Saam acupuncture in increasing the counts of several immune cells in cancer patients.

关键词：机体免疫力癌症患者针灸治疗细胞数量疗效疲劳评估细胞亚群免疫系统

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Implementation of spatial touch system using time-of-flight camera

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重庆邮电大学学报（自然科学版） 2009年第2期21卷 222-227页

作者： AHN Yang-Keun PARK Young-Choong CHOI Kwang-Soon PARK Woo-Chool seo Hae-moon JUNG Kwang-mo Intelligent Home Platform Research Center Korea Electronics Technology Institute seoul Korea

Recently developed time-of-flight principle based depth-sensing video camera technologies provide precise per-pixel range data in addition to color video. Such cameras will find application in robotics and vision-based human computer interaction scenarios such as games and gesture input systems. Time-of-flight principle range cameras are becoming more and more available. They promise to make the 3D reconstruction of scenes easier, avoiding the practical issues resulting from 3D imaging techniques based on triangulation or disparity estimation. A spatial touch system was presented which uses a depth-sensing camera to touch spatial objects and details on its implementation, and how this technology will enable new spatial interactions was speculated.

关键词：飞行时间输入系统空间对象照相机三维成像技术空间相互作用彩色图像人机交互

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Ssu72 is a T-cell receptor-responsive modifier that is indispensable for regulatory T cells

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Cellular & molecular Immunology 2021年第6期18卷 1395-1411页

作者： Jin-Kwan Lee seo-Young Koo Hye-Mi Nam Jee-Boong Lee Jiwon Ko Kyung-mo Kim Eun-Ji Park Tae Jin Kim Ho Lee Heounjeong Go Chang-Woo Lee Research Institute Curogen TechnologySuwonSouth Korea Department of molecular Cell Biology Samsung Medical CenterSungkyunkwan University School of MedicineSuwonSouth Korea moGAM Institute for Biomedical Research GyeonggiSouth Korea Department of Pathology Asan Medical CenterUniversity of Ulsan College of MedicineSeoulSouth Korea Asan Institute for Life Sciences Asan Medical CenterUniversity of Ulsan College of MedicineSeoulSouth Korea Department of Immunology Sungkyunkwan University School of MedicineSeoulSouth Korea Department of Cancer Biomedical Science Graduate School of Cancer Science and PolicyResearch InstituteNational Cancer CenterGyeonggiSouth Korea

The homeostatic balance between effector T cells and regulatory T cells(Tregs)is crucial for adaptive immunity;however,epigenetic programs that inhibit phosphorylation to regulate Treg development,peripheral expression,and suppressive activity are ***,we found that the Ssu72 phosphatase is activated by various T-cell receptor signaling pathways,including the T-cell receptor and IL-2R pathways,and localizes at the cell *** of Ssu72 in T cells disrupts CD4+T-cell differentiation into Tregs in the periphery via the production of high levels of the effector cytokines IL-2 and IFNγ,which induce CD4+T-cell activation and differentiation into effector cell *** also found a close correlation between downregulation of Ssu72 and severe defects in mucosal tolerance in ***,Ssu72 forms a complex with PLCγ1,which is an essential effector molecule for T-cell receptor signaling as well as Treg development and ***72 deficiency impairs PLCγ1 downstream signaling and results in failure of Foxp3 ***,our studies show that the Ssu72-mediated cytokine response coordinates the differentiation and function of Treg cells in the periphery.

关键词： Ssu72 Regulatory T cells FoxP3 T cell receptor Autoimmunity

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Flux Optimization During Tapping in BOF Process

Flux Optimization During Tapping in BOF Process

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The 2nd International Symposium on Clean Steel(ISCS 2011)

作者： Hyun-seo PARK Sung-mo seo Ji-Tae KWON Joo CHOI Steelmaking Research Group POSCO Technical Research Laboratories699Gumho-dongGwangyang-siJeonnam545-090Korea Technology development team plate rolling departmentGwangyang SteelworksPOSCOGumho-dongGwangyang-siJeonnam545-711Korea

An integrated Plate Mill has started it’s operation on July 7,2010 in Gwangyang Steelworks,*** production capability is about 2.5 million tons per year and the main stream consists of Blast Furnace,Hot metal pretreatment （KR）,Converter,Bubbling Station,RH/VTD and Continuous ***,it is possible to control sulfur concentration at excellent level in BOF without any further treatment in LF or VTD,which is attained by unique KR process and scrap usage strategy in *** this paper,desulfurization efficiency and steel cleanliness was introduced by optimizing flux amount during tapping in BOF *** addition,the effect of the flux addition on the refractory of ladle was investigated based on EPMA analyses with the viewpoint of phase *** cleanliness of each sample was examined using optical emission spectrometry and oxygen nitrogen determinator.

关键词： plate mill steel cleanliness flux tapping

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Carbon and nitrogen storage in an age-sequence of Pinus densiflora stands in Korea

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Science China(Life Sciences) 2010年第7期53卷 822-830页

作者： NOH Nam-Jin SON Yowhan LEE Sue-Kyoung seo Kyung-Won HEO Su-Jin1 YI Myong-Jong PARK Pil-Sun KIM Rae-Hyun SON Yeong-mo LEE Kyeong-Hak Division of Environmental Science and Ecological Engineering Korea University Korea Forest Research Institute Department of Forest Resources Kangwon National University Department of Forest Sciences Seoul National University

The carbon(C) and nitrogen(N) storage capabilities of Pinus densiflora in six different stand ages(10,27,30,32,44,and 71 years old) were investigated in *** sample trees were destructively harvested and 12 were *** from the above and belowground tree components,coarse woody debris(CWD),forest floor,and mineral soil(0-30 cm) were *** biomass was highest in the 71-year-old stand(202.8 t ha-1) and lowest in the 10-year-old stand(18.4 t ha-1).C and N storage in the mineral soil was higher in the 71-year-old stand than in the other stands,mainly due to higher soil C and N ***,the total ecosystem C and N storage(tree+forest floor+CWD+soil) was positively correlated with stand age:increasing from a minimum in the 10 year old stand(18.8 t C ha-1 and 1.3 t N ha-1) to a maximum in the 71-year-old stand(201.4 t C ha-1 and 8.5 t N ha-1).The total ecosystem C storage showed a similar sigmoidal pattern to that of tree C storage as a function of the age-sequence,while N storage in the CWD,forest floor and mineral soil showed no significant temporal *** results provide important insights that will increase our understanding of C and N storage in *** stands and our ability to predict changes according to stand age in the region.

关键词： age-sequence allometric equation biomass carbon nitrogen Pinus densiflora stand age

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Development of ToSPACE for Pipe Wall Thinning Management in Nuclear Power Plants

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World Journal of Nuclear Science and Technology 2019年第1期9卷 1-15页

作者： Kyeong mo Hwang Hun Yun Hyeok Ki seo Geun Young Lee Kyung Woo Kim Material Engineering Department Gimcheon Korea ByN Company Daejeon Korea

A number of piping components in the secondary system of nuclear power plants are exposed to aging mechanisms such as FAC (Flow-Accelerated Corrosion), cavitation, flashing, SPE (Solid Particle Erosion), LDIE (Liquid Droplet Impingement Erosion), etc. Those mechanisms may lead to thinning, leak, or rupture of the components. Due to the pipe ruptures caused by wall thinning in Surry unit 2 of USA in 1986 and in Mihama unit 3 of Japan in 1994, the pipe wall thinning management has emerged as one of the most important issues in nuclear power plants. To manage the pipe wall thinning in the secondary system, Korea has used a foreign program since 1996. As using the foreign country’s program for long term, it was necessary to improve from the perspective of the users. Accordingly, KEPCO-E & C has started to develop the 3D-based pipe wall thinning management program (ToSPACE, Total Solution for Piping And Component Engineering management) from eight years ago, and the development was successful. This paper describes the major functions included in ToSPACE program, such as 3D-based DB (Database) buildup, development of FAC and erosion evaluation theories, UT (Ultra-sonic Test) data reliability analysis, field connection with 3D, automatic establishment of long-term inspection plan, etc. ToSPACE program was developed to allow site engineers performing the selection of inspection quantity at each refueling outage, UT data reliability analysis, UT evaluation, determination of next inspection timing, identification of the inspecting and replacing components in 3D drawings, etc., to access easily.

关键词： ToSPACE Pipe Wall Thinning Flow-Accelerated Corrosion (FAC) Liquid Droplet Impingement Erosion (LDIE) Reliability Analysis 3D Management Long-Term Inspection Plan

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