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Monitoring of non-point source pollutants load from a mixed forest land use

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Journal of Environmental Sciences 2010年第6期22卷 801-805页

作者： Sung Wan Yoon Se Woong chung dong Geun Oh Jae Woon Lee Department of Environmental Engineering Chungbuk National University Geum River Environmental Research Center National Institute of Environmental Research

The aim of this study was to determine the unit load of NPS （non-point source） pollutants including organic variables such as BOD （biochemical oxygen demand）, COD （chemical oxygen demand） and DOC （dissolved organic carbon）, nitrogen and phosphorus constituents, and suspended solids （SS） and their event mean concentration （EMC） of runoff flows from a water-shed of mixed forest land use by intensive field experiments. Field monitoring for continuous measurements of rainfall, flow, and water quality was conducted over 12 storm events during 2008-2009 using automated and manual sampling methods. The EMCs of individual runoff event were estimated for each water quality constituent based on the flow rate and concentration data of runoff discharge. The average EMCs of BOD, COD, DOC, SS, TN （total nitrogen）, NH4^＋-N, NO3^--N, TP （total phosphorus）, PO4^3-P from the mixed forest land were 1.794, 3.498, 1.462, 10.269, 0.862, 0.044, 0.634, 0.034, and 0.005 mg/L, respectively. The annual unit loads of BOD, COD, DOC, SS, TN, NH4^＋-N, NO3^--N, TP and PO4^3--P were estimated as 66.9, 133.2, 55.5, 429.8, 36.5, 1.6, 26.9, 1.3 and 0.1 kg/（ha·yr）, respectively. In addition, affecting parameters on the EMCs were investigated by statistic analysis of the field data. As a result, significant correlations with precipitation, rainfall intensity, and total runoff flows were found in most constituents.

关键词： event mean concentration mixed forest land use non-point source pollutant load unit load

Significant Lifetime Enhancement in QLEDs by Reducing Interfacial Charge Accumulation via Fluorine Incorporation in the ZnO Electron Transport Layer

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Nano-Micro Letters 2022年第12期14卷 432-446页

作者： dong Seob chung Tyler Davidson-Hall Giovanni Cotella Quan Lyu Peter Chun Hany Aziz Department of Electrical and Computer Engineering Waterloo Institute for NanotechnologyUniversity of Waterloo200 University Avenue WestWaterlooON N2L 3G1Canada Ipswich Research Centre Huawei Technologies Research&Development(UK)Ltd.Phoenix House(B55)Adastral ParkIpswich IP53REUK Ottawa IC Laboratory Huawei Canada19 Allstate ParkwayMarkhamON L3R 5B4Canada

ZnO nanoparticles are widely used for the electron transport layers(ETLs)of quantum dots light emitting devices(QLEDs).In this work we show that incorporating fluorine(F)into the ZnO ETL results in significant enhancement in device electroluminescence stability,leading to LT50 at 100 cd m^(−2) of 2,370,000 h in red QLED,47X longer than the control devices.X-ray photo-electron spectroscopy,time-of-flight secondary ion mass spectroscopy,photoluminescence and electrical measurements show that the F passivates oxygen vacancies and reduces electron traps in *** photoluminescence versus bias measurements and capacitance-voltage-luminance measurements reveal that the CF4 plasma-treated ETLs lead to increased electron concentration in the QD and the QD/hole transport layer interface,subsequently decreasing hole accumulation,and hence the higher *** findings provide new insights into the critical roles that optimizing charge distribution across the layers play in influencing stability and present a novel and simple approach for extending QLED lifetimes.

关键词： Colloidal quantum dots Quantum dots light emitting device Device stability Zinc oxide nanoparticles Fluorine

A Wireless Sensor Network Platform for Elderly Persons at Home

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稀有金属材料与工程 2006年第A3期35卷 95-99页

作者： Young-dong Lee Dae-Seok Lee Wan-Young chung Risto Myllylae Dept of Computer Network Eng Graduate School of SoftwareDongseo UniversityBusan 617-716Korea Division of Computer & Information Eng Dongseo UniversityBusan 617-716Korea Dept of Electrical and Information Engineering University of OuluLinnanmaa 90570 OuluFinland

A small size ubiquitous healthcare system for the home care of elderly persons was designed and *** system comprised a wireless sensor network node,base station and server computer for the continuous monitoring of ECG *** data,an important vital sign that is commonly used in clinical and trauma care,were displayed on a graphical user interface (GUI) by transferring the data to a PDA or a terminal *** data transfer was accomplished through a base-station connected to a server computer using TCP/***-time ECG data of elderly persons or patients,as well as historical data,can also be retrieved and played back to assist the *** ubiquitous healthcare system presented in this study can effectively reduce social medical expenses,which will increase greatly in the aging society.

关键词： wireless sensor network ubiquitous healthcare ECG TinyOS platform

A formally verified transformation to unify multiple nested clocks for a Lustre-like language

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Science China(Information Sciences) 2019年第1期62卷 208-210页

作者： Gang SHI Yucheng ZHANG Shu SHANG Shengyuan WANG Yuan dong Pen-chung YEW Department of Computer Science and Technology Tsinghua University Department of Computer Science and Engineering University of Minnesota

Multiple nested clocks is a major language feature in synchronous data-flow languages such as Lustre [1]. To build a formally verified compiler for such a language, it is a common practice to compile the source program to a C-like program first before compiling it to low-level machine-dependent code using a formally verified backend compiler

关键词： A formally verified transformation to unify multiple nested clocks for a Lustre-like language cycle

Isoniazid and Pulmonary Fibrosis

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Chinese Medical Journal 2015年第5期128卷 702-703页

作者： Chae Uk chung dong ii Park Choong Sik Lee Sung Soo Jung Department of Internal Medicine Division of Pulmonology College of Medicine Chungnam National University Deajeon 301-721 Korea Department of Pathology College of Medicine Chungnam National University Deajeon 301-721 Korea

To the Editor：The anti-tuberculosis （TB） therapy can cause various drug adverse effects including hepatotoxicity,nephrotoxicity and skin rash.[1,2] There are some case reports about interstitial lung disease （ILD...

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Study of cerium-promoted rhodium alumina catalyst as a steam reforming catalyst for treatment of spent solvents

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Journal of Rare Earths 2014年第9期32卷 831-836页

作者： Hee-Chul Yang Min-Woo Lee Ho-Sang Hwang Jei-Kwon Moon dong-Yong chung Korea Atomic Energy Research Institute

This study attempted to develop an appropriate catalyst used for the steam reforming of gasified spent solvents. Rh2O3/ CeOE-Al2O3 catalysts with various CeO2 loadings were prepared and heated at different temperatures of 500 and 800 ℃, and their surface properties were studied using X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, transmission electron microscopy （TEM）, temperature programmed reduction （TPR） and Bmmauer-Emmett-Teller （BET） analyses. Rhodium existed in the form of Rh2O3, regardless of the sample composition as well as the heating temperature. In the tested range of cerium addition （up to 12 times the rhodium mass）, no significant changes in BET surface areas and binding energy corresponding to Rh 3d5/2 were observed. Instead, the addition of cerium led to a greatly enhanced dispersion of rhodium nanoparticles, and no agglomeration of rhodium was observed for samples heated even at 800 ℃. Honeycomb monolith rhodium catalysts promoted with cerium were fabricated and tested for the steam reforming of a gasified spent solvent, mainly consisting of butylene （C4H8）. The test results suggested that a cerium-promoted rhodium catalyst could be used as an appropriate reforming catalyst for treating low-quality non-methane hydrocarbons without the formation of coke at high temperatures of up to 900 ℃.

关键词： cerium rhodium catalyst steam reforming spent resin rare earths

Healthcare utilization and costs in patients with benign prostatic hyperplasia： a population-based study

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Asian Journal of Andrology 2016年第6期18卷 942-945页

作者： Shiu-dong chung Ya-Mei Tzeng Herng-Ching Lin Chao-Yuan Huang Division of Urology Department of Surgery Far Eastern Memorial Hospital New Taipei City Taiwan China School of Medicine Fu-Jen Catholic University New Taipei City Taiwan China Sleep Research Center Taipei Medical University Hospital Taipei Taiwan China Graduate Institute of Life Science National Defense Medical Center Taipei Taiwan China Department of Urology National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan China School of Public Health Taipei Medical University Taipei Taiwan China

This study aimed to investigate differences in healthcare service utilization between patients with and those without benign prostatic hyperplasia （BPH） using Taiwan＇s National Health Insurance population-based database. A total of 7413 patients with BPH and 7413 age-matched patients without BPH were included. The outcome variable was 1-year utilization of healthcare services Jncluding the number of outpatient visits, inpatient days, and the costs of outpatient and inpatient treatments. In addition, we separated healthcare services into urology services and nonurology services for analysis. We found that as to the utilization of outpatient urological services, patients with BPH had more outpatient services （7.84 vs 0.52, P 〈 0.001）, higher outpatient costs （US$372 vs US$34, P 〈 0.001）, a longer length of inpatient stay （0.55 vs 0.11, P 〈 0.001）, higher in-patients costs （US$149 vs US$32, P 〈 0.001）, and higher total costs （US$521 vs US$67, P 〈 0.001） than the comparison group. As for nonurological services, patients with BPH also had more outpatient services （49.11 vs 24.79, P〈 0.001）, higher outpatient costs （US$1794 vs US$1014, P〈 0.001）, a longer length of in-patient stay （3.72 vs 2.04, P〈 0.001）, higher inpatient costs （US$874 vs US$486, P〈 0.001）, and higher total costs （US$2668 vs US$1500, P 〈 0.001） compared to comparison patients. We also found that the average total cost was about 2-fold greater for patients with BPH than comparison patients. We concluded that patients with BPH had higher healthcare utilization than comparison patients without BPH.

关键词： benign prostatic hyperplasia epidemiology health care utilization

No increased risk of dementia in patients receiving androgen deprivation therapy for prostate cancer： a 5-year follow-up study

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Asian Journal of Andrology 2017年第4期19卷 414-417页

作者： Li-Ting Kao Herng-Ching Lin Shiu-dong chung Chao-Yuan Huang Graduate Institute of Life Science National Defense Medical Center Taipei 110 Taiwan China Sleep Research Center Taipei Medical University Hospital Taipei 110 Taiwan China Division of Urology Department of Surgery Far Eastern Memorial Hospital Taipei 110 Taiwan China Graduate Program in Biomedical Informatics College of Informatics Yuan Ze University Chung Li 320 Taiwan China Department of Urology National Taiwan University Hospital College of Medicine National Taiwan University Taipei 110 Taiwan China School of Public Health Taipei Medical University Taipei 110 Taiwan China

Prior studies suggested that the use of androgen deprivation therapy （ADT） in patients with prostate cancer （PC） might cause the impairment of cognitive function which is one of the common symptoms of dementia; however, the association between ADT and cognitive impairment still remains controversial. This retrospective cohort study aimed to investigate the relationship between ADT and subsequent risk of dementia using a population-based dataset, Data for this study were taken from the Taiwan （China） Longitudinal Health Insurance Database 2005. We included 755 PC patients who received ADT in the study cohort and 559 PC patients who did not receive ADT in the comparison cohort. Each patient was individually tracked for a 5-year period to define those who subsequently received a diagnosis of dementia. Results show that the incidence rates of dementia per 100 person-years were 2.35 （95% confidence interval [95% CI]： 1.82-2.98） and 1.85 （95% Ch 1.35-2.48） for PC patients who received ADT and those who did not receive ADT, respectively. The adjusted hazard ratio （HR） for dementia for PC patients who received ADT was 1.21 （95% Ch 0.82-1.78, P = 0,333） compared to those who did not receive ADT. In addition, the adjusted HRs for dementia for PC patients receiving ADT with gonadotropin-releasing hormone （GnRH） agonists and without GnRH agonists were 1.39 （95% Ch 0.80-2.40, P = 0.240） and 1.13 （95% CI： 0.75-1.71, P = 0.564）, respectively, compared to PC patients not receiving ADT. We concluded that there was no difference in the risk of subsequent dementia between PC patients who did and those who did not receive ADT.

关键词： androgen deprivation therapy dementia epidemiology prostate cancer

Missing Value Imputation Model Based on Adversarial Autoencoder Using Spatiotemporal Feature Extraction

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Intelligent Automation & Soft Computing 2023年第8期37卷 1925-1940页

作者： dong-Hoon Shin Seo-El Lee Byeong-Uk Jeon Kyungyong chung Department of Computer Science Kyonggi UniversitySuwon-siGyeonggi-do16227Korea Department of Public Safety Bigdata Kyonggi UniversitySuwon-siGyeonggi-do16227Korea Division of AI Computer Science and Engineering Kyonggi UniversitySuwon-siGyeonggi-do16227Korea

Recently,the importance of data analysis has increased significantly due to the rapid data *** particular,vehicle communication data,considered a significant challenge in Intelligent Transportation Systems(ITS),has spatiotemporal characteristics and many missing *** missing values in data lead to the decreased predictive performance of *** missing value imputation models ignore the topology of transportation net-works due to the structural connection of road networks,although physical distances are close in spatiotemporal image ***,the learning process of missing value imputation models requires complete data,but there are limitations in securing complete vehicle communication *** study proposes a missing value imputation model based on adversarial autoencoder using spatiotemporal feature extraction to address these *** proposed method replaces missing values by reflecting spatiotemporal characteristics of transportation data using temporal convolution and spatial *** results show that the proposed model has the lowest error rate of 5.92%,demonstrating excellent predictive *** this,it is possible to solve the data sparsity problem and improve traffic safety by showing superior predictive performance.

关键词： Missing value adversarial autoencoder spatiotemporal feature extraction