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Parameterization of below-cloud scavenging for polydisperse fine mode aerosols as a function of rain intensity

Journal of Environmental Sciences 2023年第10期132卷 43-55页

作者： chang hoon jung Hyung-Min Lee Dasom Park Young Jun Yoon Yongjoo Choi Junshik Um Seoung Soo Lee Ji Yi Lee Yong Pyo Kim Department of Health Management Kyungin Women’s UniversityIncheon 21041Korea Department of Environmental Science and Engineering Ewha Woman’s UniversitySeoulKorea Department of Environmental Engineering Konkuk UniversitySeoulKorea Korea Polar Research Institute IncheonKorea Department of Environment Hankuk University of Foreign StudiesYonginKorea Department of Atmospheric Sciences Pusan National UniversityBusanKorea Earth System Science Interdisciplinary Center University of MarylandCollege ParkMDUSA Research Center for Climate Sciences Pusan National UniversityBusanKorea Department of Chemical Engineering and Materials Science Ewha Womans UniversitySeoulKorea

The below-cloud aerosol scavenging process by precipitation is one of the most important mechanisms to remove aerosols from the *** to its complexity and dependence on both aerosol and raindrop sizes,wet scavenging process has been poorly treated,especially during the removal of fine *** makes the numerical simulation of below-cloud scavenging in large-scale aerosolmodels *** consider the slip effects of submicron particles,a simplified expression for the diffusion scavenging was developed by approximating the Cunningham slip correction *** derived analytic solution was parameterized as a simple power function of rain intensity under the assumption of the lognormal size distribution of *** resultant approximated expression was compared to the observed data and the results of previous studies including a 3D atmospheric chemical transport model *** with the default GEOS-Chem coefficient of 0.00106R0.61 and the observation-based coefficient of 0.0144R0.9268,the coefficient of a and b in∧m=aRb spread in the range of 0.0002-0.1959 for a and 0.3261-0.525 for b over a size distribution of GSD of 1.3–2.5 and a geometric mean diameter of 0.01-2.5μ***,this study showed that the scavenging coefficient varies widely by orders of magnitude according to the size distribution of particles and rain *** study also demonstrated that the obtained simplified expression could consider the theoretical approach of aerosol *** proposed analytic approach showed that results can be effectively applied for reduced computational burden in atmospheric modeling.

关键词： Below-cloud scavenging Polydisperse aerosol Parameterization Cunningham correction factor Scavenging coefficient

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The H∞ Robust Stability and Performance Conditions for Uncertain Robot Manipulators

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 270-272页

作者： Geun Il Song Hae Yeon Park jung hoon Kim the Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) the Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) the Institute for Convergence Research and Education in Advanced Technology Yonsei University

Dear Editor,H∞This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot *** often exist model uncertainties between the nominal model and the real robot manipulator and disturbances. Hence, dealing with their effects plays a crucial role in leading to high tracking performances, as discussed in [1]–[5].

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Next High Performance and Low Power Flash Memory Package Structure

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Journal of Computer Science & Technology 2007年第4期22卷 515-520页

作者： jung-hoon Lee ERI Control Instrumentation EngineeringGyeongSang National UniversityJinju660-701Korea

In general, NAND flash memory has advantages in low power consumption, storage capacity, and fast erase/write performance in contrast to NOR flash. But, main drawback of the NAND flash memory is the slow access time for random read operations. Therefore, we proposed the new NAND flash memory package for overcoming this major drawback. We present a high performance and low power NAND flash memory system with a dual cache memory. The proposed NAND flash package consists of two parts, i.e., an NAND flash memory module, and a dual cache module. The new NAND flash memory system can achieve dramatically higher performance and lower power consumption compared with any conventionM NAND-type flash memory module. Our results show that the proposed system can reduce about 78% of write operations into the flash memory cell and about 70% of read operations from the flash memory cell by using only additional 3KB cache space. This value represents high potential to achieve low power consumption and high performance gain.

关键词： flash memory NAND-type NOR-type memory localities buffer or cache memory

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Microfluidic dual loops reactor for conducting a multistep reaction

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Frontiers of Chemical Science and Engineering 2018年第2期12卷 239-246页

作者： Si Hyung Jin Jae-hoon jung Seong-Geun Jeong Jongmin Kim Tae jung Park chang-Soo Lee Department of Chemical Engineering Chungnam National University Daejeon 34134 Korea Lotte Chemical R&D Center Daejeon 34110 Korea Department of Chemistry Chung-Ang University Seoul 06974 Korea

Precise control of each individual reaction that constitutes a multistep reaction must be performed to obtain the desired reaction product efficiently. In this work, we present a microfluidic dual loops reactor that enables multistep reaction by integrating two identical loop reactors. Specifically, reactants A and B are synthesized in the first loop reactor and transferred to the second loop reactor to synthesize with reactant C to form the final product. These individual reactions have nano-liter volumes and are carded out in a stepwise manner in each reactor without any cross-contamination issue. To pre- cisely control the mixing efficiency in each loop reactor, we investigate the operating pressure and the operating frequency on the mixing valves for rotary mixing. This microfluidic dual loops reactor is integrated with several valves to realize the fully automated unit operation of a multistep reaction, such as metering the reactants, rotary mixing, transportation, and collecting the product. For proof of concept, CdSeZn nanopartieles are successfully synthesized in a microfluidic dual loops reactor through a fully automated mukistep reaction. Taking all of these features together, this microfluidic dual loops reactor is a general microfluidic screening platform that can synthesize various materials through a multistep reaction.

关键词： microfluidics multistep reaction rotary mixing nanoparticle

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Intramedullary spinal cord metastasis from pancreatic neuroendocrine tumor

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World Journal of Gastroenterology 2014年第38期20卷 14063-14067页

作者： jung Ho Kim chang Lim Hyun Sang hoon Han Department of Internal Medicine Gachon University Gil Medical Center Department of Pathology Jeju National University School of Medicine Department of Internal Medicine Jeju National University School of Medicine

Intramedullary spinal cord metastasis(ISCM) is very rare and its optimal treatment remains controversial. Pancreatic neuroendocrine tumor(pNET) is a rare tumor that usually presents with hepatic metastasis. Hepatic failure due to tumor progression is the major cause of death in cases of pNET. To date,no report has described a case of ISCM from pNET. Although spinal cord metastasis of a solid tumor is uncommon,it is a critical condition that can cause a potentially irreversible loss of neurologic function. Here,we report the case of a 45-year-old man who presented with leg weakness and voiding difficulty,and was found to have ISCM from pNET. Surgical treatment prevented further neurological deterioration. This is the first case report of ISCM from pNET.

关键词： Intramedullary Spinal cord neoplasm Metastasis Neuroendocrine tumor Pancreas

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Phosphorylated p70S6K in urothelial carcinoma of the tumor recurrence noninvasive low-grade bladder： correlation with

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Asian Journal of Andrology 2014年第4期16卷 611-617页

作者： Soon-Ja Kim jung hoon Kim Hui Seok jung Tae-Jin Lee Kyung Mee Lee In Ho chang Department of Convergence Medicine and Pharmaceutical Biosciences Chung-Ang University Graduate School Seoul Department of Urology Department of Pathology Chung-Ang University College of Medicine Seoul Korea.

We investigated whether inhibiting phosphorylated p70S6K （p-p70S6K） suppresses the proliferation and growth of noninvasive low-grade urothelial carcinoma （LG-URCa） in vitro and whether p-p70S6K can serve as a predictive biomarker for the recurrence of noninvasive LG-URCa of the bladder in patients. We constructed a tissue microarray （TMA） for 95 LG-URCa and 35 benign urothelium samples and performed immunohistochemical staining for p-p70S6K and p-4E-BP1. A Cox regression model was used to investigate the predictive factors for recurrence of LG-URCa. We investigated the dose-dependent antiproliferative effect of rapamycin, its antiproliferative effect and the growth-inhibition effect of p70S6K siRNA transfection in RT4 and 253J cell lines. The pT1 staged group （P 〈 0.05; hazard ratio （HR）, 2.415） and the high p-p70S6K staining group （P 〈 0.05; HR, 2.249） were independent factors for predicting recurrence. Rapamycin inhibited RT4 and 253J cell proliferation in a dose-dependent manner （r = -0.850, P 〈 0.001 in RT4 cells; r = -0.835, P 〈 0.001 in 253J cells）. RT4 and 253J cell proliferation and growth were inhibited by the transfection of p70S6K siRNA and rapamycin, respectively （P 〈 0.05）. Transfection of p70S6K siRNA resulted in inhibitory effects on cell proliferation and growth that were similar to those of rapamycin. Our results suggest that inhibiting p70S6K phosphorylation is important to prevent recurrence and that p70S6K phosphorylation can be used as a molecular biomarker to predict recurrence of certain LG-URCa of the bladder.

关键词： bladder cancer p7OS6K

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Influences of ions and temperature on performance of carbon nano-particulates in supercapacitors with neutral aqueous electrolytes

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Particuology 2014年第4期12卷 9-17页

作者： jung hoon Chae George Zheng Chen Department of Chemical and Environmental Engineering and Energy and Sustainability Research DivisionFaculty of EngineeringUniversity of NottinghamNottinghamNG7 2RDUK

A commercial product of carbon nano-particles, Cabot MONACH 1300 pigment black （CMPB）, was studied for basic structural information and electrochemical performance in neutral aqueous electrolytes, aiming at applications in supercapacitors. As confirmed by SEM and HRTEM, the CMPB had a hierarchical struc- ture, containing basic 10 nm nano-spheres which combined into ca. 50 nm agglomerates which further aggregated into larger particles of micrometres. The capacitance of this commercial material was found to increase with decreasing the size of hydrous cation （Li＋→Na＋ → K＋）, instead of the cation crystal radius （K＋→ Na＋→Li＋） when coupled with the same anion （cl-）. In electrolytes with the same cation concentration （K＋）, changing the anion from the larger dianion （SO42 ） to the smaller monoanion （cl-） also increased the capacitance at high potential scan rates （〉50 mV/s）. Increasing electrolyte concentration produced expected effect, including raising the electrode capacitance, but lowering the equivalent series resistance （ESR）, charge transfer resistance （CTR）, and the diffusion resistance. At higher temperatures, the CMPB exhibited slightly higher capacitance, which does not agree with the Gouy-Chapman theory on electric double layer （EDL）. A hypothesis is proposed to account for the capacitance increase with temperature as a result of the CMPB opening up some micro-pores for more ions to access in response to the temperature increase.

关键词： Carbon nano-particlesSupercapacitorNeutral aqueous electrolytesIonic propertiesElectrochemistry

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Comparison of magnetic properties of DNA-cetyltrimethyl ammonium complex with those of natural DNA

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Science China Chemistry 2012年第5期55卷 814-821页

作者： KWON Young-Wan CHOI Dong hoon JIN jung-Il LEE chang hoon KOH Eui Kwan GROTE James G. Department of Chemistry Korea University Seoul 136-701 Korea Department of Polymer Science & Engineering Chosun University Gwangju 501-759 Korea Korea Basic Science Institute-Seoul Branch Korea University Seoul 136-701 Korea US Air Force Research Laboratory Materials and Manufacturing Directorate AFRL/MLPS Wright-Patterson Air Force Base Ohio USA

We prepared the DNA-cetyltrimethyl ammonium complex, as well as the same complex intercalated with stable organic free radicals, and studied their magnetic properties by electron magnetic resonance (EMR) spectroscopy and by measuring the magnetization on a superconducting quantum interference device (SQUID). The UV-vis and CD spectra of DNA-quaternary alkyl ammonium complex (DNA--Q+) in organic solvent clearly demonstrated that it retained the double helical B-form conformation. The interhelical spacing of double strand DNA (dsDNA) increased when the counter ions (Na+) of phosphate groups of the natural DNA were replaced with the long alkyl quaternary ammonium groups. The inter-helical distance of DNA-cetyltrimethyl ammonium (CTMA) was 39.1  as confirmed by X-ray diffractometry. In general, the magnetization of the DNA-CTMA complex solid was found to be significantly lower than that of natural DNA. Moreover, intercalation of the complex with stable organic free radicals did not improve magnetization, which again was in marked contrast to natural DNA. EMR spectroscopic behavior of the complex in the solid state also was quite different from that of natural DNA: The unique broad EMR signal of natural DNA in the low field region with g-value greater than 10 disappeared in the DNA-CTMA complex.

关键词： natural DNA DNA-CTMA DNA-CTMA-PTMI magnetic property electron magnetic resonance (EMR) superconducting quantum interference device (SQUID)

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Combination Treatment with Herbal Medicines and Western Medicines in Atopic Dermatitis:Benefits and Considerations

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Chinese Journal of Integrative Medicine 2016年第5期22卷 323-327页

作者： jung-hoon Kim Hyungwoo Kim Division of Pharmacology School of Korean MedicinePusan National University

Herbal medicines （HMs） are often used in combination with Western medicines （WMs） to improve therapeutic efficacies of orthodox medicines. This review discussed the current status of combination treatment with HMs and WMs in clinical practices. The influence of HMs on bioavailability of WMs was also discussed from the pharmacokinetic point of view. In addition, benefits and considerations of combination treatment were discussed using data obtained from clinical trials and randomized controlled trials of HMs treatment in skin diseases.

关键词： combination treatment herbal medicine atopic dermatitis psoriasis pharmacokinetics

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Quantification of HBsAg:Basic virology for clinical practice

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World Journal of Gastroenterology 2011年第3期17卷 283-289页

作者： jung Min Lee Sang hoon Ahn Department of Internal Medicine Yonsei University College of Medicine Department of Internal Medicine Institute of GastroenterologyYonsei University College of Medicine Liver Cirrhosis Clinical Research Center

Hepatitis B surface antigen (HBsAg) is produced and secreted through a complex mechanism that is still not fully understood. In clinical fields, HBsAg has long served as a qualitative diagnostic marker for hepatitis B virus infection. Notably, advances have been made in the development of quantitative HBsAg assays, which have allowed viral replication monitoring, and there is an opportunity to make maximal use of quantitative HBsAg to elucidate its role in clinical fields. Yet, it needs to be underscored that a further understanding of HBsAg, not only from clinical point of view but also from a virologic point of view, would enable us to deepen our insights, so that we could more widely expand and apply its utility. It is also important to be familiar with HBsAg variants and their clinical consequences in terms of immune escape mutants, issues resulting from overlap with corresponding mutation in the P gene, and detection problems for the HBsAg variants. In this article, we review current concepts and issues on the quantification of HBsAg titers with respect to their biologic nature, method principles, and clinically relevant topics.

关键词： Hepatitis B virus Hepatitis B surface antigen Quantitative assay Virology

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