A5001887935- Building Energy and Comfort Optimization
- Infection Control and Ventilation
- Indoor Air Quality and Microbial Exposure
- COVID-19 epidemiological studies
- Facilities and Workplace Management
- Educational Environments and Student Outcomes
- Urban Heat Island Mitigation
- Urban Green Space and Health
- Noise Effects and Management
- Impact of Light on Environment and Health
- BIM and Construction Integration
- COVID-19 and healthcare impacts
- Sustainable Building Design and Assessment
- Climate Change and Health Impacts
- SARS-CoV-2 detection and testing
- Energy Efficiency and Management
- Dermatology and Skin Diseases
- Color perception and design
- Air Quality and Health Impacts
- COVID-19 impact on air quality
- Gut microbiota and health
- Allergic Rhinitis and Sensitization
- Clostridium difficile and Clostridium perfringens research
- Conservation Techniques and Studies
- Odor and Emission Control Technologies
University of Nebraska–Lincoln
2025
University of Oregon
2016-2023
Oregon Health & Science University
2020
University of Idaho
2008-2020
Community Link
2020
U.S. Green Building Council
2020
Urban Land Institute
2020
American Institute of Architects
2020
Washington College
2010
University of Washington
2010
Existing visual comfort metrics are reviewed and critiqued based upon their ability to explain the variability in human subjective responses a daylit private office laboratory environment. Participants (n = 48) evaluated preference factors, totaling 1488 discreet appraisals, luminance-based were captured with high dynamic range images illuminance-based recorded. Vertical illuminance outperformed all commonly referenced including horizontal illuminance, IES luminance ratios, daylight glare...
New research in daylighting metrics and developments validated digital High Dynamic Range (HDR) photography techniques suggest that luminance based lighting controls have the potential to provide occupant satisfaction energy saving improvements over traditional illuminance controls. This paper studies preference acceptance of patterns using HDR imaging a repeated measures design methodology daylit office environment. Three existing threshold analysis methods [method1: predetermined absolute...
Microbial communities associated with indoor dust abound in the built environment. The transmission of sunlight through windows is a key building design consideration, but effects light exposure on remain unclear. We report results an experiment and computational models designed to assess wavelengths structure microbiome. Specifically, we placed household replicate model "rooms" that transmitted visible, ultraviolet, or no measured taxonomic compositions, absolute abundances, viabilities...
Antimicrobials in indoor dust pose concerns due to their endocrine disrupting activities and potential promotion of antibiotic resistance. We adopted dispersive solid phase extraction (d-SPE) liquid chromatography-tandem mass spectrometry (LC-MS/MS) quantify antimicrobials dust. The method showed favorable linearity (R2 >0.99), recovery (83-115%), detection limits (1.2-5.6 ng/g, dry weight). All seven analytes were found at median concentrations ng/g each the 80 U.S. samples collected from...
The ubiquitous use of antimicrobial chemicals may have undesired consequences, particularly on microbes in buildings. This study shows that the taxonomy and function indoor dust are strongly associated with chemicals—more so than any other feature Moreover, we identified links between chemical concentrations culturable bacteria cross-resistant to three clinically relevant antibiotics. These findings suggest humans be influencing microbial species genes found indoors through addition removal...
A new suite of visual comfort metrics is proposed and evaluated for their ability to explain the variability in subjective human responses a mock private office environment with daylight. Participants (n = 48) rated preference factors, including 1488 discreet appraisals, these results were correlated against more than 2000 unique luminance-based that captured using high dynamic range photography techniques. Importantly, capable illuminance-based fitting data from questionnaire items. No...
Abstract Background Several studies indicate that coronavirus disease 2019 (COVID-19) is primarily transmitted within indoor spaces. Therefore, environmental characterization of severe acute respiratory syndrome 2 viral load with respect to human activity, building parameters, and mitigation strategies critical combat transmission. Methods We recruited 11 participants diagnosed COVID-19 individually occupy a controlled chamber conduct specified physical activities under range conditions; we...
Daylight has the potential to positively impact occupants and reduce energy consumption in buildings if utilized correctly ( Edwards & Torcellini, 2002 ). However, unintended negative outcomes can arise from unsuccessful daylighting schemes. Common issues, such as glare heat gain, are important architectural considerations design of building envelope, but less studied corresponding interior furniture layout access controls) associated occupant interactions appraisals. The purpose current...
This article compares and contrasts existing emerging discomfort glare analysis metrics that can be used to predict occupants' acceptance of preference for competing design solutions evaluate the likelihood manual blind deployment or automated overrides upon occupancy. It documents synthesizes how other factors affect use both manually controlled blinds in buildings with vertical fenestration, based on a review several laboratory field studies. Finally, this identifies current knowledge...
Over the last several decades, designers have used digital screens to view images of real and simulated spaces make critical design decisions. Screen technology has improved during this time, as technologies like OLED replaced legacy displays (CRT, plasma, LCD). These new provide a higher pixel resolution, luminous output contrast ratio. Immersive head-mounted now allow immersive images, recent developments in real-time rendering encouraged uptake virtual reality (VR) mainstream practice...
Evidence continues to grow supporting the aerosol transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To assess potential role heating, ventilation, and air conditioning (HVAC) systems in airborne viral transmission, this study sought determine presence, if any, on handling units a healthcare setting where disease 2019 (COVID-19) patients were being treated. The presence SARS-CoV-2 RNA was detected approximately 25% samples taken from ten different locations...
Abstract Background Environmental surveillance of infectious organisms holds tremendous promise to reduce human-to-human transmission in indoor spaces through early detection. Objective In this study we determined the applicability and limitations wastewater, high-touch surfaces, in-room air, rooftop exhaust air sampling methods for detecting SARS-CoV-2 a real world building occupied by residents recently diagnosed with COVID-19. Methods We concurrently examined results three 24-hour...
Introduction Humans have used wood as a construction material throughout history. Currently, mass timber products, such cross-laminated (CLT), are becoming more popular structural material, since they renewable and lower carbon footprint than concrete or steel. Nonetheless, some building types, healthcare, veterinary, food manufacturing, avoid using due to concerns about microbial growth in the event of wetting. One solution is use protective coatings on products increase moisture...
Aerosol transmission has played a significant role in the of COVID-19 disease worldwide. We developed aerosol risk estimation model to better understand how key parameters associated with indoor spaces and infector emissions affect inhaled deposited dose particles that convey SARS-CoV-2 virus. The calculates concentration size-resolved, virus-laden well-mixed air challenged by from an index case(s). uses mechanistic approach, accounting for particle emission dynamics, deposition surfaces,...
The IES Lighting Measurement 83-12 Approved Method: Spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE) (LM-83) codifies annual climate–based daylighting metrics performance criteria, yet interpretation application of the criteria are not fully substantiated. This article reports "daylit area" drawings prepared in field by architecture students compares these to corresponding point-in-time simulations. simulations without blinds showed less discrepancy between student daylit...