Dong Hee Choi

ORCID: 0000-0001-6561-0721
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About
Contact & Profiles
Research Areas
  • Indoor Air Quality and Microbial Exposure
  • Air Quality and Health Impacts
  • Wind and Air Flow Studies
  • Odor and Emission Control Technologies
  • Energy and Environmental Systems
  • Noise Effects and Management
  • Building Energy and Comfort Optimization
  • Aerosol Filtration and Electrostatic Precipitation
  • Distributed and Parallel Computing Systems
  • Sleep and Work-Related Fatigue
  • Healthcare Education and Workforce Issues
  • Conservation Techniques and Studies
  • Robotics and Automated Systems
  • Microbial Community Ecology and Physiology
  • Genomics and Phylogenetic Studies
  • Extracellular vesicles in disease
  • Infection Control and Ventilation
  • Health and Wellbeing Research
  • Fire Detection and Safety Systems
  • COVID-19 and healthcare impacts
  • Impact of Light on Environment and Health
  • Hygrothermal properties of building materials
  • Diverse Academic Research Analysis
  • Context-Aware Activity Recognition Systems
  • Frequency Control in Power Systems

Seoul National University
2006-2024

Kyungil University
2013-2023

Yonsei University
2017-2018

Gyeongsang National University
2016-2017

Korea Institute of Ocean Science and Technology
2015

Kangwon National University
2005-2014

Gangdong University
2014

Sangji University
2014

Pennsylvania State University
2012

National Research Council Canada
2012

A rod-shaped marine bacterium, CL-TA03 T , isolated from a biofilm in coastal fish farm Tongyeong, Korea, was characterized for physiological and biochemical features, fatty acid profile phylogenetic position based on 16S rRNA gene sequences. Analysis of the sequence revealed clear affiliation with family Rhodobacteraceae . Phylogenetic analysis showed that closest relatives were Thalassobius gelatinovorus mediterraneus (95.6 % similarity). The similarities between other type species...

10.1099/ijs.0.64235-0 article EN INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 2006-08-01

ABSTRACT Extracellular vesicles (EVs) produced by a sulfur-reducing, hyperthermophilic archaeon, “ Thermococcus onnurineus ” NA1 T , were purified and characterized. A maximum of four EV bands, showing buoyant densities between 1.1899 1.2828 g cm −3 observed after CsCl ultracentrifugation. The two major B (buoyant density at 25°C [ρ 25 ] = 1.2434 ) C (ρ 1.2648 ), separately counted using qNano particle analyzer. These EVs, different densities, identically spherical in shape, their sizes...

10.1128/aem.00428-15 article EN Applied and Environmental Microbiology 2015-05-02

The objective of this study is to analyze the volatile organic compounds (VOCs) in surgical smoke generated during laparoscopic surgery, and determine their influence on indoor air quality hospital operating rooms (ORs). Field measurements were carried out eight surgeries conventional robotic ORs which an electrosurgery system was being used, thus continuously generating smoke. VOCs measured at three different locations, patients' abdominal cavities, beside table, exhaust vent. Other...

10.4209/aaqr.2016.05.0191 article EN cc-by Aerosol and Air Quality Research 2016-09-26

Air pollution due to PM2.5 is of public concern in Korea. Ambient can penetrate indoors through the building envelope, affecting indoor concentrations. Most people stay for approximately 80% every day, implying that their primary exposure could be determined by air. This study aims investigate infiltration ambient envelop apartment housing units The on-site test method, using a blower-door depressurization procedure, was suggested order maintain an identical indoor-outdoor pressure...

10.4209/aaqr.2016.06.0287 article EN Aerosol and Air Quality Research 2016-10-07

Abstract Novosphingobium pentaromativorans US6-1 T is a species in the family Sphingomonadaceae . According to phylogenetic analysis based on 16S rRNA gene sequence of N. and nine genome-sequenced strains genus , similarity ranged from 93.9 99.9 % highest was found with sp. PP1Y (99.9 %), whereas ANI value genomes 70.9 93 %. This microorganism isolated muddy coastal bay sediments where environment heavily polluted by polycyclic aromatic hydrocarbons (PAHs). It previously shown be capable...

10.1186/s40793-015-0102-1 article EN cc-by Standards in Genomic Sciences 2015-11-19

The effects of using a non-adhesive floating method for the installation wallpaper and plywood flooring on emissions indoor concentrations volatile organic compounds (VOCs) in full-scale test rooms were investigated. VOCs from wallpaper, flooring, adhesives composite materials measured small-scale chamber. Toluene was major VOC detected both flooring. thin porous characteristics allowed rapid emission toluene adhesive applied wall materials; whereas, thick complex composition appeared to...

10.1177/1420326x10372730 article EN Indoor and Built Environment 2010-07-12

The emission rates of volatile organic compounds (VOC) from building materials and the resulting indoor concentrations are influenced by temperature. Radiant floor heating systems widely used in most residential buildings Korea, VOC emissions flooring increase as temperature rises. In this study, a numerical model is presented to evaluate at different temperatures depending on conditions. A coupled developed simulate variation heated space, which combines heat transfer for air with mass...

10.4209/aaqr.2011.11.0222 article EN Aerosol and Air Quality Research 2012-01-01

This study investigates indoor/outdoor relationships of airborne particles under controlled pressure difference across the building envelope in Korean multifamily apartments. On-site field experiments on 14 apartment housing units located urban areas Korea are conducted to measure ratios number concentrations size-resolved (0.3–0.5, 0.5–1.0, 1.0–3.0, 3.0–5.0, 5.0–10.0, >10.0 μm). To set identical conditions each unit for better comparison I/O ratio results, and examine effect relations,...

10.3390/su10114074 article EN Sustainability 2018-11-06

서 론 1. 연구의 필요성

10.7586/jkbns.2014.16.2.98 article KO Daehan gicho ganho jayeon gwahag hoeji 2014-05-31

To reduce the risk of indoor air pollution caused by synthetic building materials, low-volitile organic compounds (VOC) including adhesives, are commonly used in construction. Although adhesives do not directly contact air, they affect VOC mass transfer at surface finishing materials diffusion. This study investigates emission and sorption behaviors with low-VOC adhesives. Small chamber experiments were designed parallel to field measurements examine onsite rates adhesive-bonded materials....

10.1080/01694243.2012.690661 article EN Journal of Adhesion Science and Technology 2012-08-10

The purpose of this study was to evaluate outdoor PM2.5 infiltration into multifamily homes according the building characteristics using regression models. Field test results from 23 were analyzed investigate factor and including floor area, volume, outer surface age, airtightness. Correlation analysis then conducted identify that is most strongly associated with PM2.5. field tests revealed average 0.71 (±0.19). correlation airtightness metrics (ACH50, ELA/FA, NL) had a statistically...

10.3390/su13105708 article EN Sustainability 2021-05-19

10.5370/jeet.2018.13.1.105 article EN Journal of Electrical Engineering and Technology 2018-01-01

A survey was conducted to analyze the discrepancies of functional requirements façade system in residential units among 605 real-life public and 73 experts. Personal housing information, resident life patterns, usage behavior, were collected from respondents. Both experts recognized insulation as main function opening systems. More than 85% opened windows for ventilation, but ventilation ranked 3rd amongst 4th functions list The cited inflow fine dust reason dissatisfaction with windows. In...

10.3390/su16104286 article EN Sustainability 2024-05-19

Web Service has its characteristic of statelessness. But, many applications on Grid need the stateful services. The advanced search HVEM DataGrid is one example. service provides a multi-depth and an associated search. should trace states provide access control as well security in process. In addition, we remember that Services or resources can stretch multiple Virtual Organization(VO)s Certificate Authority(CA)s. this paper, propose secure to satisfy requirements stated. We describe...

10.1109/e-science.2007.8 article EN 2007-01-01

This study compared the relating factors on attitude for elderly between women group and female university student group. The woman had higher scores in perceived health status, self integrity, self-efficacy, social support,

10.3233/thc-140808 article EN Technology and Health Care 2014-05-29
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