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Comparison of the Bright Band characteristics Measured by Micro Rain Radar (MRR) at a Mountain and a Coastal Site in South Korea

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Advances in Atmospheric Sciences 2009年第2期26卷 211-221页

作者： joo-Wan cha Ki-Ho chaNG Seong Soo YUM young-Jean CHOI Department of Atmospheric Sciences Yonsei University Global Environment System Research Laboratory NIMR/KMA

Data from a long term measurement of Micro Rain Radar （MRR） at a mountain site （Daegwallyeong, DG, one year period of 2005） and a coastal site （Haenam, HN, three years 2004-2006） in South Korea were analyzed to compare the MRR measured bright band characteristics of stratiform precipitation at the two sites. On average, the bright band was somewhat thicker and the sharpness （average gradient of reflectivity above and below the reflectivity peak） was slightly weaker at DG, compared to those values at HN. The peak reflectivity itself was twice as strong and the relative location of the peak reflectivity within the bright band was higher at HN than at DG. Importantly, the variability of these values was much larger at HN than at DG. The key parameter to cause these differences is suggested to be the difference of the snow particle densities at the two sites, which is related to the degree of riming. Therefore, it is speculated that the cloud microphysical processes at HN may have varied significantly from un-rimed snow growth, producing low density snow particles, to the riming of higher density particles, while snow particle growth at DG was more consistently affected by the riming process, and therefore high density snow particles. Forced uplifting of cloudy air over the mountain area around DG might have resulted in an orographic supercooling effect that led to the enhanced riming of supercooled cloud drops.

关键词： Micro Rain Radar bright band thickness and sharpness cloud microphysical processes local characteristics

Stable carbon and nitrogen isotopic composition of gas hydrate-bearing sediment from Hydrate Ridge,Cascadia Margin

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Science China Earth Sciences 2006年第8期49卷 872-880页

作者： young-joo Lee Petroleum and Marine Resources Research Division Korea Institute of Geoscience and Mineral Resources Daejon 305-350South Korea

54 sediments were sampled at 5 sites, 1244, 1245, 1246,1250 and 1251 from ODPLeg 204, Hydrate Ridge, Cascadia Margin. The stable carbon and nitrogen isotopic composition,δ^(13)C of organic matter and δ^(15)N, have been used to characterize the depositional variationof sediments with gas hydrate bearing. Values of δ^(13)C of bulk organic matter range between-22.37 per thousand and -24.72 per thousand PDB, with a mean value of -23.54 ± 1.17 per thousandPDB; δ^(15)N of the same sedimentary samples range from 3.30 per thousand to 5.68 per thousand,with a mean value of 4.49 ± 1.19 per thousand; Values of C/N ratio range from 4.53 to 9.26, with amean value of 6.90 ± 2.37. The occurrence of gas hydrate changed the diagenetic evolution trend ofthe carbon and nitrogen in organic matter. The δ^(15)N and C/N ratio depletion suggest that thenitrogen fixation related with the bacteria/archaea maybe occurred in the sediments near thehydrate. The stable carbon and nitrogen isotopic composition could be used to evaluate thedepositional environment in the study area.

关键词： gas hydrate, carbon isotopes, nitrogen isotopes, C/N ratio, nitrogen fixation.

SUMS OF DUAL TOEPLITZ PRODUCTS ON THE ORTHOGONAL COMPLEMENTS OF FOCK-SOBOLEV SPACES

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Acta Mathematica Scientia 2024年第3期44卷 810-822页

作者：陈泳 young joo Lee Department of Mathematics Hangzhou Normal UniversityHangzhou311121China Department of Mathematics Chonnam National UniversityGwangju61186Korea

We consider dual Toeplitz operators on the orthogonal complements of the FockSobolev spaces of all nonnegative real ***,for symbols in a certain class containing all bounded functions,we study the problem of when an operator which is finite sums of the dual Toeplitz products is compact or ***,for bounded symbols,we construct a symbol map and exhibit a short exact sequence associated with the C^(*)-algebra generated by all dual Toeplitz operators with bounded symbols.

关键词： dual Toeplitz operators Fock-Sobolev spaces symbol map

Cryptogenic organizing pneumonia associated with pregnancy:A case report

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World Journal of Clinical Cases 2022年第6期10卷 1946-1951页

作者： young joo Lee young Sun Kim Department of Obstetrics and Gynecology Kyung Hee University Medical CenterSeoul 02447South Korea

BACKGROUND Cryptogenic organizing pneumonia(COP),formerly known as bronchiolitis obliterans organizing pneumonia,is an extremely rare disease in *** this case,we report on COP diagnosed in recurrent pneumonia that does not respond to antibiotics in pregnant *** SUMMARY A 35-year-old woman with no prior lung disease presented with concerns of chest pain with cough,sputum,dyspnea,and mild fever at 11 wk’*** was diagnosed with community-acquired pneumonia and treated with antibiotics;her symptoms improved *** weeks after discharge,she was readmitted with aggravated *** computed tomography demonstrated multifocal patchy airspace consolidation and ground-glass opacities at the basal segments of the right lower lobe,at the lateral basal segment of the lower lobe,and at the lingular segment of the left upper *** lavage revealed an increased lymphocyte count and a decreased CD4/CD8 ***(0.5 mg/kg/d)was administered for 10 d after the second *** improved after 3 d of steroid treatment and other symptoms improved on the 5th day of steroid ***-delivery transbronchial lung biopsy further revealed the presence of granulation tissue with fibroblasts in smallbronchiole *** This case suggests that it is important to differentiate COP from atypical pneumonia in the deteriorated condition despite antibiotic treatment.

关键词： Antibiotics Bronchiolitis obliterans organizing pneumonia Corticosteroid Cryptogenic organizing pneumonia Pregnancy Case report

The Influx of the Tsushima Current into the Central Ulleung Basin of East Sea (Sea of Japan), Korea

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Acta Geologica Sinica(English Edition) 2014年第6期88卷 1846-1851页

作者： young-Suk BAK Seong-joo LEE The Earth and Environmental System Research Center Chonbuk National University Department of Geology Kyungpook National University

A total of 85 samples, collected from the UBGH1-9 core taken from the Ulleung Basin, East Sea, Korea, were analyzed using diatom assemblages. 111 diatom species belonging to 46 genera were identified, and three diatom assemblage zones were established on the basis of occurrence and distribution pattern of diatoms. Diatom assemblage zone I（134.10–174 m） is characterized by a relatively high abundance of marine species, while the increased number of the brackish species is recorded in diatom assemblage zone II（75–125 m）. The assemblage zones IIIa became drastic drop of valve abundances and brackish planktons, whereas it became increase during the IIIb. High Td values which indicate an influence of warm current are recorded both in diatom assemblage zone I and III, and low Td values in diatom assemblage zone II. Analysis of diatom assemblages indicating that the depositional condition moved from oceanic to littoral-neritic environments and that paleotemperature underwent a shift from warm to cold condition at the middle interval, and from cold to warm condition in the upper interval of the UBGH1-9 core. This suggests that the lower（130–162 m） and upper intervals（0–20 m） of the UBGH1-9 core were deposited in the warm current condition（Tsushima Warm Current）.

关键词： assemblage depositional littoral drastic genera abundance oceanic Korea valve preservation

Probiotics prophylaxis in pyelonephritis infants with normal urinary tracts

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World Journal of Pediatrics 2016年第4期12卷 425-429页

作者： Seung joo Lee Jihae cha Jung Won Lee Department of Pediatrics Ewha Women's University School of Medicine Kangnam Sacred Heart Hospital Hallym University School of Medicine

Background:Pyelonephritis in infants is considered as a major factor for the formation of renal *** prevent recurrent pyelonephritis and renal damage,prophylaxis is extremely *** aim of this study was to compare the effectiveness of probiotic and antibiotic prophylaxis or no-prophylaxis in infants with pyelonephritis and normal urinary ***:Altogether 191 infants,who were diagnosed with acute pyelonephritis,proven to have normal urinary tracts and followed up for 6 months on prophylaxis,were retrospectively *** to the types of prophylaxis,the infants were divided into three groups[probiotics(Lactobacillus species),antibiotics(trimethoprim/sulfamethoxazole,TMP/SMX),and noprophylaxis].The incidence of recurrent urinary tract infection(UTI)during 6 months after the development of pyelonephritis,main causative uropathogens,and its antimicrobial sensitivities were ***:The incidence of recurrent UTI in the probiotic group was 8.2%,which was significantly lower than 20.6%in the no-prophylaxis group(P=0.035)and was not significantly different from 10.0%of the antibiotic group(P=0.532).The significant difference between the probiotic and no-prophylaxis groups was seen only in male infants(P=0.032).The main causative organism of recurrent UTI was Escherichia coli(***),which was not different among the three groups(P=0.305).The resistance rate of *** to TMP/SMX was 100%in the antibiotic group,which was significantly higher than 25.0%in the probiotic group and 41.7%in the no-prophylaxis group(P=0.008).Conclusion:Probiotic prophylaxis was more effective in infants with pyelonephritis and normal urinary tract than in those with *** could be used as a natural alternative to antibiotic prophylaxis.

关键词： antibiotic prophylaxis antibiotic resistance probiotic prophylaxis pyelonephritis

Advancements in hemostatic strategies for managing upper gastrointestinal bleeding: A comprehensive review

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World Journal of Gastroenterology 2024年第15期30卷 2087-2090页

作者： Ah young Lee joo young Cho Division of Gastroenterology Department of Internal MedicineCha Gangnam Medical CenterCha University College of MedicineSeoul 06135Korea

Upper gastrointestinal(GI)hemorrhage presents a substantial clinical *** management typically involves resuscitation and endoscopy within 24 h,although the benefit of very early endoscopy(chanical tamponades but have ***,the first-line therapy includes thermal probes and hemoclips,with over-the-scope clips emerging for larger ulcer *** gold probe,combining bipolar electrocoagulation and injection,offers targeted coagulation but has faced device-related *** advancements involve combining techniques and improving endoscopic imaging,with studies exploring combined approaches showing *** research is crucial for developing standardized and effective hemorrhage management strategies.

关键词： Upper gastrointestinal bleeding Hemostasis Endoscopy Probe Spray Clip

Active control of highway bridges subject to a variety of earthquake loads

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Earthquake Engineering and Engineering Vibration 2015年第2期14卷 253-263页

作者： Ryan Mitchell young-Jin cha Yeesock Kim Aniket Anil Mahajan Department of Civil and Environmental Engineering Worcester Polytechnic Institute (WPI) Worcester MA 01609-2280 USAGraduate Research Assistant Department of Civil Engineering University of Manitoba Winnipeg MB R3L5V6 Canada Assistant Professor Department of Civil and Environmental Engineering Worcester Polytechnic Institute (WPI) Worcester MA 01609-2280 USA Department of Civil and Environmental Engineering Worcester Polytechnic Institute (WPI) Worcester MA 01609-2280 USA Graduate Research Assistant

In this paper, a wavelet-fi ltered genetic-neuro-fuzzy(WGNF) control system design framework for response control of a highway bridge under various earthquake loads is discussed. The WGNF controller is developed by combining fuzzy logic, discrete wavelet transform, genetic algorithms, and neural networks for use as a control algorithm. To evaluate the performance of the WGNF algorithm, it is tested on a highway bridge equipped with hydraulic actuators. It controls the actuators installed on the abutments of the highway bridge structure. Various earthquakes used as input signals include an artifi cial earthquake, the El-Centro, Kobe, North Palm Springs, Turkey Bolu, Chi-Chi, and Northridge earthquakes. It is proved that the WGNF control system is effective in mitigating the vibration of the highway bridge under a variety of seismic excitation.

关键词： structural control wavelet transform genetic algor

Evaluation of the Mrp2-mediated flavonoid-drug interaction potential of quercetin in rats and in vitro models

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Asian Journal of Pharmaceutical Sciences 2019年第6期14卷 621-630页

作者： Ju-Hee Oh joo Hyun Lee young-joo Lee Division of Biopharmaceutics College of PharmacyKyung Hee UniversitySeoul 02447Republic of Korea Department of Life and Nanopharmaceutical Sciences College of PharmacyKyung Hee UniversitySeoul 02447Republic of Korea

Quercetin is a biologically active flavonoid that has been used as a popular health *** is reported that quercetin may cause flavonoid-drug interaction mediated by P-glycoprotein,the most predominant efflux *** this study,we comprehensively evaluated the potential of the pharmacokinetic interaction of quercetin mediated by multidrug resistance-associated protein 2(MRP2),another major efflux ***2-transfected MDCKII cells and LS174T cells were used to evaluate the potential inhibition and induction of MRP2 by quercetin in *** evaluate the induction effect of quercetin on Mrp2 in vivo,Mrp2 mRNA expression in rat liver,kidney,and small intestinal tissues was determined after the oral administration of quercetin(50,100,or 250 mg/kg)for seven ***2-mediated interaction potential was also evaluated by the pharmacokinetic study of phenolsulfonphthalein in rats after single or multiple doses of ***,the effect of quercetin on absorption of docetaxel,a P-glycoprotein and CYP3A4 substrate,was also *** inhibited the function of MRP2 at 10μM and induced the mRNA expression of MRP2 at 50μM in ***,at 100 mg/kg,quercetin markedly increased Mrp2 expression in the small intestine of ***,there was no significant change in phenolsulfonphthalein pharmacokinetics due to single-(50,100,or 250 mg/kg)or multiple-dose(50,100,or 250 mg/kg for seven days)quercetin *** contrast,a significant interaction caused by quercetin(100 mg/kg)was observed in the absorption of *** results suggested that although quercetin modulates the function and expression of MRP2 in vitro,it may have a low potential of Mrp2-mediated interaction and present negligible safety concerns related to the interaction.

关键词： Quercetin P-glycoprotein Multidrug resistance-associated protein 2 Pharmacokinetics Flavonoid-drug interaction