Article
Multidisciplinary Sciences
Martin Z. Bazant, John W. M. Bush
Summary: The importance of airborne transmission of COVID-19 is widely recognized, but there is currently no safety guideline proposed. The suggestion is to set an upper limit on cumulative exposure time in indoor spaces, which depends on factors such as ventilation and air filtration rates, room dimensions, breathing rate, respiratory activity, and face mask use.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Construction & Building Technology
Ihab Hasan Hatif, Haslinda Mohamed Kamar, Nazri Kamsah, Keng Yinn Wong
Summary: This study compares the effectiveness of different air distribution systems, including mixing ventilation (MV), displacement ventilation (DV), and stratum ventilation (SV), and evaluates specific influencing factors for each system. The results show that no single system consistently outperforms others, and the effectiveness depends on different conditions. DV and SV systems may have higher infection risks in certain situations, while MV systems are recommended for use when people's locations and relative positions are unclear.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Environmental Sciences
Zahra Noorimotlagh, Neemat Jaafarzadeh, Susana Silva Martinez, Seyyed Abbas Mirzaee
Summary: The possibility of airborne transmission of SARS-CoV-2 in indoor air environments has been highlighted in the face of the COVID-19 pandemic. Measures such as improving ventilation, maintaining interpersonal distance, and considering the airborne transmission route are crucial for protecting health.
ENVIRONMENTAL RESEARCH
(2021)
Review
Construction & Building Technology
Nima Izadyar, Wendy Miller
Summary: This review paper examines the impact of ventilation on the spread of aerosols and suggests efficient strategies such as personalized ventilation systems and consideration of design features to control indoor aerosol transmission. It emphasizes the importance of ventilation rates and suggests the use of filtration and decontamination devices to enhance ventilation performance.
BUILDING AND ENVIRONMENT
(2022)
Review
Construction & Building Technology
Saeed Rayegan, Chang Shu, Justin Berquist, Jisoo Jeon, Liang (Grace) Zhou, Liangzhu (Leon) Wang, Hamza Mbareche, Patrique Tardif, Hua Ge
Summary: This paper reviews the modeling and mitigation strategies of COVID-19 airborne transmission. It discusses various simulation models, their mathematical descriptions and assumptions, as well as the input data and measurements used in previous studies. It also classifies and evaluates the recommended mitigation strategies for different building types. The paper highlights the knowledge gaps and provides recommendations for future research.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Environmental Sciences
Ajith N. Nair, Prashant Anand, Abraham George, Nilabhra Mondal
Summary: This article provides a comprehensive review on the mechanisms, factors, and control measures of airborne transmission of viruses. It reveals that airborne viruses can remain infectious for hours and that air pollutants and environmental parameters have significant influences on virus transmission. By collating measures and building techniques from various research studies, architects and organizations can improve or design building systems to combat COVID-19 or future pandemics.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
B. R. Rowe, A. Canosa, J. M. Drouffe, J. B. A. Mitchell
Summary: The paper develops a simple model to assess the inhaled flow rate of aerosol particles of respiratory origin and its connection to the probability of developing airborne diseases. It demonstrates that outdoor contamination risk is generally significantly lower than indoor risk, except for specific meteorological and topographical situations. The research sheds light on COVID19 spreading patterns in mountain valleys with temperature inversions compared to other less impacted areas.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Narumichi Iwamura, Kanako Tsutsumi
Summary: This study developed a model using indoor CO2 concentration to estimate the probability of airborne transmission of the SARS-CoV-2 Omicron strains. The model was found to accurately estimate the R-0, basic reproduction number, in different clinical settings. The findings provide valuable information for preventing airborne transmission in hospitals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Engineering, Environmental
Reza Saeedi, Ehsan Ahmadi, Mohammad Sadegh Hassanvand, Mehrnoosh Abtahi Mohasel, Samira Yousefzadeh, Mohammad Safari
Summary: This article systematically reviews research on the airborne transmission of SARS-COV-2 in various indoor settings since the beginning of the COVID-19 pandemic. The results show that dormitories and classrooms received the most attention, followed by office buildings, healthcare facilities, residential buildings, and other enclosed spaces. Ventilation rate was found to be the most influential parameter in controlling the spread of infection, and CO2 levels were used as a reference for viral spread in buildings. Natural ventilation or a combination of mechanical and natural ventilation was highly effective in the studies.
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
(2023)
Article
Construction & Building Technology
Theresa Pistochini, Caton Mande, Subhrajit Chakraborty
Summary: Lowering the potential for airborne disease transmission in school buildings is crucial, and balancing health and energy consumption is important in ventilation and filtration measures. The study found that an improved filtration system reduced energy consumption by 31% compared to 100% outdoor air ventilation, and decreased infection probability by 29%. Additionally, activating cooling based on outdoor temperature setpoint using an economizer increased ventilation, reduced energy consumption, and lowered infection probability.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Zechariah Lau, Ian M. Griffiths, Aaron English, Katerina Kaouri
Summary: This study develops a spatially dependent model to determine the infection risk of airborne virus transmission. The model considers factors such as advection, diffusion, virus emission, ventilation, and gravitational settling. Real-life case studies and simulations show that improved ventilation significantly reduces concentration and infection risk, following specific mathematical laws. The model is easily adaptable for different parameters and can predict infection time.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Paul Danca, Costin Ioan Cosoiu, Ilinca Nastase, Florin Bode, Matei Razvan Georgescu
Summary: This paper discusses a novel approach for reducing the risk of contracting airborne infectious diseases by using a low-momentum personalized ventilation system, which creates a microclimate around each passenger with cleaner and fresher air than traditional ventilation systems. Simulation and experimental results demonstrated the effectiveness of the proposed system in providing protection against airborne pathogens.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Naohide Shinohara, Jun Sakaguchi, Hoon Kim, Naoki Kagi, Koichi Tatsu, Hiroyuki Mano, Yuichi Iwasaki, Wataru Naito
Summary: The study found that the air exchange rates in train cars are influenced by factors such as the degree of window opening, whether doors are closed, and the speed of the train. Under specific conditions, opening doors and windows and turning on the central air conditioning/fan system can significantly reduce the risk of infection for passengers on trains.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Immunology
Nicky McCreesh, Mbali Mohlamonyane, Anita Edwards, Stephen Olivier, Keabetswe Dikgale, Njabulo Dayi, Dickman Gareta, Robin Wood, Alison D. Grant, Richard G. White, Keren Middelkoop
Summary: Data on social contact patterns are widely used in mathematical models of infectious diseases. Most studies focus on close contacts, but casual contacts may also contribute to airborne transmission. Analyzing data from South Africa, this study found that age mixing patterns did not vary greatly between infection types, but older age groups had fewer casual contacts, suggesting an overestimation of their contribution to airborne transmission.
EMERGING INFECTIOUS DISEASES
(2022)
Article
Engineering, Environmental
Vincent Chi-Chung Cheng, David Christopher Lung, Shuk-Ching Wong, Albert Ka-Wing Au, Qun Wang, Hong Chen, Li Xin, Allen Wing-Ho Chu, Jonathan Daniel Ip, Wan-Mui Chan, Hoi-Wah Tsoi, Herman Tse, Ken Ho-Leung Ng, Mike Yat-Wah Kwan, Shuk-Kwan Chuang, Kelvin Kai-Wang To, Yuguo Li, Kwok-Yung Yuen
Summary: This study investigated an outbreak of the Omicron variant in a restaurant and found that enhancing indoor air dilution can reduce the risk of SARS-CoV-2 transmission in restaurants.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Asma Grira, Cornelia Amarandei, Manolis N. Romanias, Gisele El Dib, Andre Canosa, Cecilia Arsene, Iustinian Gabriel Bejan, Romeo Iulian Olariu, Patrice Coddeville, Alexandre Tomas
Article
Instruments & Instrumentation
O. Durif, M. Capron, J. P. Messinger, A. Benidar, L. Biennier, J. Bourgalais, A. Canosa, J. Courbe, G. A. Garcia, J. F. Gil, L. Nahon, M. Okumura, L. Rutkowski, I. R. Sims, J. Thievin, S. D. Le Picard
Summary: A new instrument dedicated to studying low-temperature gas phase neutral-neutral reactions has been introduced, combining a supersonic flow reactor with vacuum ultra-violet synchrotron photoionization time-of-flight mass spectrometry. The instrument utilizes a photoion-photoelectron coincidence detection scheme to optimize particle counting efficiency, and its capabilities have been demonstrated through a variety of results obtained at low temperatures, such as the photoionization spectrum of n-butane, detection of formic acid dimer formation, and observation of diacetylene molecules formed by specific reactions.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Environmental Sciences
Asma Grira, Maria Antinolo, Andre Canosa, Alexandre Tomas, Elena Jimenez, Gisele El Dib
Summary: The gas-phase reaction between trans-2-pentenal (T2P) and Cl atoms was investigated using different simulation chambers, with a rate coefficient obtained and products identified and quantified. The formation of secondary organic aerosol (SOA) was explored, showing peak yields at high particle mass concentrations. The study provides insights into the reaction mechanism and atmospheric implications of Cl atom reactions with T2P.
Article
Environmental Sciences
A. Grira, C. Kalalian, J. N. Illmann, I Patroescu-Klotz, G. El Dib, P. Coddeville, A. Canosa, C. Coeur, P. Wiesen, E. Roth, A. Chakir, A. Tomas
Summary: This study investigated the kinetics, product formation, chemical mechanism, and SOA formation of the gas-phase reaction of trans-2-hexenal (T2H) with O3. The results demonstrate that ozonolysis of 2-alkenals can be a significant source of secondary organic aerosol (SOA) in the atmosphere.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
B. R. Rowe, A. Canosa, J. M. Drouffe, J. B. A. Mitchell
Summary: The paper develops a simple model to assess the inhaled flow rate of aerosol particles of respiratory origin and its connection to the probability of developing airborne diseases. It demonstrates that outdoor contamination risk is generally significantly lower than indoor risk, except for specific meteorological and topographical situations. The research sheds light on COVID19 spreading patterns in mountain valleys with temperature inversions compared to other less impacted areas.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Physical
E. M. Neeman, D. Gonzalez, S. Blazquez, B. Ballesteros, A. Canosa, M. Antinolo, L. Vereecken, J. Albaladejo, E. Jimenez
Summary: Recent studies on the role of water vapor and its hydrogen-bonded complexes in gas-phase reactivity of organic compounds with hydroxyl radicals have shown contradictory effects at different temperatures. The comprehensive study concluded that water actually slows down the reaction rate between OH and acetaldehyde instead of catalyzing it.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Environmental Sciences
Carmen Kalalian, Asma Grira, Jan Niklas Illmann, Iulia Patroescu-Klotz, Gisele El Dib, Patrice Coddeville, Andre Canosa, Peter Wiesen, Basheer Aazaad, Lakshmipathi Senthilkumar, Estelle Roth, Alexandre Tomas, Abdelkhaleq Chakir
Summary: We investigated the kinetics, mechanism and formation of secondary organic aerosols (SOA) during the ozonolysis of trans-2-pentenal (T2P). The results showed that the aldehyde functional group plays a significant role in the fragmentation of primary ozonide.
Article
Astronomy & Astrophysics
Daniel Gonzalez, Bernabe Ballesteros, Andre Canosa, Jose Albaladejo, Elena Jimenez
Summary: This study presents the first kinetic study of the gas-phase reactions between interstellar molecules NH3 and CH3NH2 and OH radicals. The results show that the abundance of NH3 does not significantly change at cold dark molecular cloud temperatures, while the destruction route for CH3NH2 is negligible.
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2022)
Article
Chemistry, Physical
Asma Grira, Cornelia Amarandei, Claudiu Roman, Oumaya Bejaoui, Nouha Aloui, Gisele El Dib, Cecilia Arsene, Iustinian G. Bejan, Romeo I. Olariu, Andre Canosa, Alexandre Tomas
Summary: The rate coefficients of the reaction between unsaturated alcohols and ozone were determined, and it was found that the rate coefficients depend strongly on the structure of the alcohols. Alkenols have relatively short lifetimes in the atmosphere but exhibit high reactivity with ozone.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Editorial Material
Astronomy & Astrophysics
Ashraf Ali, Andre Canosa, David Leisawitz
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2022)
Article
Chemistry, Physical
Asma Grira, Maria Antinolo, Andre Canosa, Alexandre Tomas, Gisele El Dib, Elena Jimenez
Summary: This study investigates the gas-phase reaction between trans-2-hexenal and chlorine atoms. The results show that trans-2-hexenal can serve as a source of secondary organic aerosols under certain conditions.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Physical
Daniel Gonzalez, Anxo Lema-Saavedra, Sara Espinosa, Emilio Martinez-Nunez, Antonio Fernandez-Ramos, Andre Canosa, Bernabe Ballesteros, Elena Jimenez
Summary: This study experimentally and theoretically investigated the kinetics and product formation of the OH + CH3NH2 reaction. The results showed a drastic increase in reaction rate at lower temperatures and different reaction trends under different pressure conditions. CH3NH was found to be the dominant product at low temperatures, while CH2NH2 was dominant at higher temperatures, with both reaction channels competing at temperatures above 300 K.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Sergio Blazquez, Daniel Gonzalez, Elias M. Neeman, Bernabe Ballesteros, Marcelino Agundez, Andre Canosa, Jose Albaladejo, Jose Cernicharo, Elena Jimenez
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Antonio J. Ocana, Sergio Blazquez, Alexey Potapov, Bernabe Ballesteros, Andre Canosa, Maria Antinolo, Luc Vereecken, Jose Albaladejo, Elena Jimenez
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Miaomiao Liu, Salah Almazmumi, Pinlu Cao, Carlos Jimenez-bescos, John Kaiser Calautit
Summary: Windcatchers provide effective low-energy ventilation and summer passive cooling in temperate climates. However, their use in winter is limited due to significant ventilation heat loss and potential discomfort. This study evaluates the applicability of windcatchers in low-temperature conditions, highlighting the need for control strategies to reduce over-ventilation and the integration of heat recovery or thermal storage to enhance winter thermal conditions.
BUILDING AND ENVIRONMENT
(2024)
Review
Construction & Building Technology
Behrouz Nourozi, Aneta Wierzbicka, Runming Yao, Sasan Sadrizadeh
Summary: This article presents a systematic review of ventilation solutions in hospital wards, aiming to enhance pathogen removal performance while maintaining patient and healthcare staff comfort using air-cleaning techniques. The study reveals the importance of proper ventilation systems in reducing infection risk and adverse effects of cross-contamination.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhen Yang, Weirong Zhang, Hongkai Liu, Weijia Zhang, Mingyuan Qin
Summary: The study examines the influence of personalized local heating on the thermal comfort of occupants in old residential buildings. The findings reveal that personalized local heating can increase the overall thermal sensation of occupants, but only a few methods are effective in enhancing thermal comfort. The chosen heating methods and background temperature affect the participants' selection of heating parts.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Hong Cheng, Dan Norback, Huilin Zhang, Liu Yang, Baizhan Li, Yinping Zhang, Zhuohui Zhao, Qihong Deng, Chen Huang, Xu Yang, Chan Lu, Hua Qian, Tingting Wang, Ling Zhang, Wei Yu, Juan Wang, Xin Zhang
Summary: The home environment and sick building syndrome (SBS) symptoms in five southern Chinese cities have been studied over time. The study found a decrease in asthma prevalence and an increase in allergic rhinitis. Cockroaches, rats, mice, mosquitoes or flies were identified as consistent biological risk factors for SBS symptoms, while redecoration, buying new furniture, and traffic air pollution were identified as other risk factors.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Chaojie Xing, Zhengtao Ai, Zhiwei Liu, Cheuk Ming Mak, Hai Ming Wong
Summary: This study experimentally investigated the emission characteristics of droplets around the mouth during dental treatments. The results showed that the peak mass fraction of droplets occurs within the size range of 20 μm to 100 μm, and droplets with a diameter less than 200 μm account for over 80% of the mass fraction. The dominant emission direction of droplets is towards the dummy's head and chest, forming an approximately cone shape.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhijian Liu, Zhe Han, Lina Hu, Chenxing Hu, Rui Rong
Summary: This study compared the effects of different respiratory behaviors on the distribution of aerosols in a ward and the risk of infection for healthcare workers using numerical simulation. It was found that talking in the ward significantly increased aerosol concentrations, particularly short periods of talking. Wards designed with side-supply ventilation had lower overall infection risk. Talking alternately between healthcare workers and patients slightly extended the impact time of aerosols.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Yan, Mengyuan Kang, Haodong Zhang, Zhiwei Lian, Xiaojun Fan, Chandra Sekhar, Pawel Wargocki, Li Lan
Summary: In a high-density city, opening windows for sleep may lead to increased indoor temperature, higher PM2.5 concentration, and noise disturbance, which can negatively impact sleep quality.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Bai, Liang Liu, Kai Liu, Shuai Yu, Yifan Shen, Di Sun
Summary: This study developed a non-intrusive personal thermal comfort model using machine learning techniques combined with infrared facial recognition. The results showed that the ensemble learning models perform better than traditional models, and the broad learning model has a higher prediction precision with lower computational complexity and faster training speed compared to deep neural networks. The findings provide a reference for optimizing building thermal environments.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yue Lei, Zeynep Duygu Tekler, Sicheng Zhan, Clayton Miller, Adrian Chong
Summary: Mixed-mode ventilation is a promising solution for achieving energy-efficient and comfortable indoor environments. This study found that occupants can thermally adapt when switching between natural ventilation (NV) and air-conditioning (AC) modes within the same day, with the adaptation process stabilizing between 35 to 45 minutes after the mode switch. These findings are important for optimizing thermal comfort in mixed-mode controls, considering the dynamic nature of thermal adaptation.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Nan Mo, Jie Han, Yingde Yin, Yelin Zhang
Summary: This study develops a method based on the LCZ framework for a comprehensive evaluation of urban-scale heat island effects, considering the impact of geographic factors on LST. The results show that Guilin's geomorphological conditions lead to abnormal heat island effects during winter, and the cooling effects of mountains and water bodies vary seasonally in different built areas, with LCZ 2 exhibiting the strongest cooling effect.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Tunga Salthammer
Summary: Monitoring the potential formaldehyde emission of wood-based materials through test chamber investigations has significantly contributed to reducing indoor formaldehyde concentrations. However, the different methodologies used in these procedures prevent direct result comparison. Empirical models for converting formaldehyde steady-state concentrations based on temperature, humidity, air change rate, and loading were developed in the 1970s and have been modified to accommodate the development of lower-emitting materials. Formaldehyde emissions from wood-based materials are complex and require nonlinear regression tools for mathematical analysis.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Katarina Stebelova, Katarina Kovacova, Zuzana Dzirbikova, Peter Hanuliak, Tomas Bacigal, Peter Hartman, Andrea Vargova, Jozef Hraska
Summary: This study investigated the impact of reduced short-wavelength light on the hormone melatonin metabolite 6-sulfatoxymelatonin (u-sMEL) and examined the association between previous day's light exposure and u-sMEL. It was found that reducing short-wavelength light during the day did not change the concentration of u-sMEL. Personal photopic illuminance was positively correlated with u-sMEL in the reference week. The illuminance had a significant impact on u-sMEL, as shown by the evaluation of the mean of all three urine samples. However, this correlation was not found in the experimental week.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Ruoxin Xiong, Ying Shi, Haoming Jing, Wei Liang, Yorie Nakahira, Pingbo Tang
Summary: This study proposes a data-model integration method to identify and calibrate uncertainties in machine learning models, leading to improved thermal perception predictions. The method utilizes the Multidimensional Association Rule Mining algorithm to identify biased human responses and enhances prediction accuracy and reliability. The study also evaluates different calibration techniques and discovers their potential in enhancing prediction reliability.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Beichao Hu, Zeda Yin, Abderrachid Hamrani, Arturo Leon, Dwayne McDaniel
Summary: This paper introduces an innovative super-resolution approach to model the air flow and temperature field in the cold aisle of a data center. The proposed method reconstructs a high-fidelity flow field by using a low-fidelity flow field, significantly reducing the computational time and enabling real-time prediction.
BUILDING AND ENVIRONMENT
(2024)