A5087156954- Infection Control and Ventilation
- Building Energy and Comfort Optimization
- Indoor Air Quality and Microbial Exposure
- COVID-19 and healthcare impacts
- Wind and Air Flow Studies
- Construction Project Management and Performance
- Occupational Health and Safety Research
- Infection Control in Healthcare
- BIM and Construction Integration
- Quality and Safety in Healthcare
- Evacuation and Crowd Dynamics
- Air Quality and Health Impacts
- COVID-19 epidemiological studies
- Climate Change and Health Impacts
- Refrigeration and Air Conditioning Technologies
- Pressure Ulcer Prevention and Management
- Sustainable Building Design and Assessment
- Disaster Response and Management
- Particle Dynamics in Fluid Flows
- Facilities and Workplace Management
- Intravenous Infusion Technology and Safety
- Recycled Aggregate Concrete Performance
- Cloud Data Security Solutions
- Surgical site infection prevention
- Construction Engineering and Safety
Clemson University
2018-2025
University of Tehran
2024
University of Kashan
2023
Prisma Health
2021
University of California, Berkeley
2020
University of Nebraska–Lincoln
2014-2016
Human activity is known to leave significant effects on indoor airflow patterns. These patterns are carefully designed for many facilities such as cleanrooms, pharmaceutical settings, and healthcare environments, where human-induced wakes contribute the transport of contaminants. Therefore, knowledge about these it relates air quality critical. As a result, series experiments were conducted in controlled chamber study three-dimensional true human walking airflow. Experiments capture effect...
Certain pathogens are transmitted through air by respiratory droplets that desiccate shortly after emission and form droplet nuclei (Nicas et al. 2005). Droplet sufficiently small (<5.0 μm) to remain suspended in indefinitely and, thus, create a pathway between an infected susceptible person (Sehulster 2003). This process is called "airborne transmission." Patients with airborne infectious disease (e.g., measles, SARS, tuberculosis, varicella, etc.) isolated from the healthcare environment...
Although the two concepts of lean and sustainable construction have been developed due to different incentives, they do not pursue same exact goals, there exists considerable commonality between them. This paper discusses potentials for integrating approaches their practices how resulting synergy from combining methods can potentially lead higher levels fulfilling individual goals each Some limitations challenges implementing integrated approach are also discussed. Based on a comprehensive...
Cleanroom ventilation systems are well-established; however, the advantages and limitations of current practices need to be examined explained further. This study begins by looking over history cleanroom that creates basis for understanding rate specifications, terminologies employed in effectiveness, recognizing scientific studies correlate effectiveness with air change rates. systematic review includes a comprehensive summary contains set historical data evidence may used specify...
Most studies on the transmission of infectious airborne disease have focused patient room air changes per hour (ACH) and how ACH provides pathogen dilution removal. The logical but mostly unproven premise is that greater change rates reduce concentration particles thus, probability transmission. Recently, a growing body research suggests pathways between pathogenic source (patient) control (exhaust) may be dominant environmental factor. While increases in been associated with ventilation...
Project scope development is a crucial step for transport infrastructure projects. This paper addresses the need streamlined and automated project process. A user-driven decision framework in design services created to automate process enhance quality consistency of scopes. The study involved systematic literature search, state Department Transportation (DOT) historical data, input from subject matter experts (SMEs), analysis DOTs practices inform comprehensive template transportation...
Ventilation performance and air quality in cleanrooms are affected by several interconnected parameters, a change one component can impact the entire system. Furthermore, occupant interactions with physical environment influence particle dispersion, disrupt current airflow introducing new wakes ultimately decrease ventilation efficacy. As result, we set up an experimental study to measure effects of traffic, flowrate filtration on while source contamination was inside room. Experiments...
Air cleanliness is of particular importance in clean environments, as a small source contamination can highly disturb the true function space. One common-place approach to establish positive pressure relative adjacent areas that would avoid unwanted airborne particles. However, door operation and movement traffic may result air mixing across cleanroom door. This paper presents results series experiments characterize effect difference, flow opening on cross-contamination quality inside...
Building ventilation systems are responsible for providing a favorable thermal condition, as well maintaining acceptable indoor air quality. Thus, rates extremely high in hospitals to avoid exposure potentially fatal threads. This, of course, means higher energy consumption rates, making among the top intensive buildings. One approach circumvent such tradeoff is design smart system, where quality continuously measured by series sensors, whose real time readings help adjust rates. In this...
(1) Background: Many schools and higher education settings have confronted the issue of reopening their facilities after COVID-19 pandemic. In response, several airflow strategies spanning from adding portable air purifiers to major mechanical overhauls been suggested equip classrooms with what is necessary provide a safe reliable environment. Yet, there are many unknowns about specific contributions building system its design performance on indoor quality (IAQ) improvements. (2) Methods:...
Since the 1990s, improvements in ventilation techniques and isolation procedures have been widely credited with decline nosocomial transmission of tuberculosis other airborne diseases. Little effort, however, has made to study risk patients acquiring secondary infections from contaminated air migrating into negatively pressurized rooms adjacent spaces. As a result, an actual hospital was used observe transport aerosol nursing station general patient room nearby infectious (AIIR). Aerosols...
Approximately half of the nosocomial aspergillosis outbreaks in hospitals have been associated with renovation activities. When disturbed, spores encapsulated building materials can be aerosolized and transported throughout healthcare facility causing potentially fatal complications, particularly among elderly immunocompromised patients. Thus, a series experiments were conducted an actual hospital to observe containment removal airborne particulates respect ventilation arrangement...
Performing construction renovation and demolition activities in healthcare centers produces contamination that places visitors, staff, and, more importantly, hospitalized patients at increased risk of associated infections. Most all existing guidelines for the facilities encourage implementation a negative pressurization strategy to contain contaminants within zone. However, definitive guidance regarding optimum level(s) pressure is limited. In this research, series experiments were...