A5019812900- Electrolyte and hormonal disorders
- Neonatal Respiratory Health Research
- Neonatal Health and Biochemistry
- Retinal and Optic Conditions
- Air Quality and Health Impacts
- Energy and Environment Impacts
- Urban Transport and Accessibility
- Cerebral Venous Sinus Thrombosis
- Air Quality Monitoring and Forecasting
- Noise Effects and Management
- COVID-19 impact on air quality
- Impact of Light on Environment and Health
- Municipal Solid Waste Management
- Primary Care and Health Outcomes
- Atmospheric chemistry and aerosols
- Hearing Loss and Rehabilitation
- Advanced X-ray and CT Imaging
- Medical Imaging Techniques and Applications
- Photovoltaic System Optimization Techniques
- Healthcare and Environmental Waste Management
- Poverty, Education, and Child Welfare
- Digital Radiography and Breast Imaging
- Advanced Optical Imaging Technologies
- Social Acceptance of Renewable Energy
- Human Mobility and Location-Based Analysis
University of Ghana
2012-2024
Perspectives Charter School
2019-2023
Johns Hopkins University
2019-2023
University of Washington
2018-2023
Faculty of Media
2019-2022
Advisory Board Company (United States)
2018-2020
Seattle University
2018-2019
Linde (United States)
2018-2019
IFC Research (United Kingdom)
2018-2019
Online Technologies (United States)
2018-2019
Particulate matter air pollution is a leading cause of global mortality, particularly in Asia and Africa. Addressing the high wide-ranging levels requires ambient monitoring, but many low- middle-income countries (LMICs) remain scarcely monitored. To address these data gaps, recent studies have utilized low-cost sensors. These sensors varied performance, little literature exists about sensor intercomparison By colocating 2 QuantAQ Modulair-PM, PurpleAir PA-II SD, 16 Clarity Node-S Generation...
This study examined the spatial, socioeconomic status (SES), and temporal patterns of ambient air pollution in Accra, Ghana. Over 22 months, integrated continuous rooftop particulate matter (PM) monitors were placed at a total 11 residential or roadside monitoring sites four neighborhoods varying SES biomass fuel use. PM concentrations highest late December January, due to dust blown from Sahara. Excluding this period, annual PM2.5 ranged 39 53 μg/m3 30 70 sites; mean PM10 80 108 57 106...
BackgroundSources of air pollution in developing country cities include transportation and industrial pollution, biomass coal fuel use, resuspended dust from unpaved roads.ObjectivesOur goal was to understand within-neighborhood spatial variability particulate matter (PM) communities varying socioeconomic status (SES) Accra, Ghana, quantify the effects nearby sources on local PM concentration.MethodsWe conducted 1 week morning afternoon mobile stationary measurements four study...
Many urban households in developing countries use biomass fuels for cooking. The proportion of household varies among neighborhoods, and is generally higher low socioeconomic status (SES) communities. Little known how air pollution by SES it affected traffic sources country cities. In four neighborhoods Accra, Ghana, we collected analyzed geo-referenced data on community particulate matter (PM) pollution, SES, fuel domestic small-commercial cooking, housing characteristics, distance to major...
Study uses real-time monitors to analyze PM 2.5 in Abidjan & Accra, revealing diurnal seasonal patterns, highlighting city differences, showing Saharan dust impact. Emphasizes RAMPs' efficacy need for robust monitoring West African cities.
Household air pollution in sub-Saharan Africa and other developing regions is an important cause of disease burden. Little known about the chemical composition sources household Africa, how they differ between rural urban homes. We analyzed fine particles (PM2.5) cooking areas multiple neighborhoods Accra, Ghana, peri-urban (Banjul) (Basse) The Gambia. In biomass burning accounted for 39-62% total PM2.5 mass area different neighborhoods; absolute contributions were 10-45 μg/m(3). Road dust...
Low-cost sensors (LCSs) for air quality monitoring have enormous potential to improve data coverage in resource-limited parts of the world such as sub-Saharan Africa. LCSs, however, are affected by environment and source conditions. To establish high-quality data, LCSs must be collocated calibrated with reference grade PM2.5 monitors. From March 2020, a low-cost PurpleAir monitor was Met One Beta Attenuation Monitor 1020 Accra, Ghana. While previous studies shown that multiple linear...
Growing cities in sub-Saharan Africa (SSA) experience high levels of ambient air pollution. However, sparse long-term city-wide pollution exposure data limits policy mitigation efforts and assessment the health climate effects. In first study its kind West Africa, we developed resolution spatiotemporal land use regression (LUR) models to map fine particulate matter (PM2.5) black carbon (BC) concentrations Greater Accra Metropolitan Area (GAMA), one fastest sprawling metropolises SSA. We...
The highest levels of air pollution in the world now occur developing country cities, where sources differ from high-income countries. We analyzed particulate matter (PM) chemical composition and estimated contributions various to particle poor affluent neighborhoods Accra, Ghana. Elements earth's crust were most abundant during seasonal Harmattan period between late December January when Saharan dust is carried coastal West Africa. During Harmattan, crustal particles accounted for 55 μg m−3...
Sub-Saharan Africa (SSA) is rapidly urbanizing, and ambient air pollution has emerged as a major environmental health concern in growing cities. Yet, effective quality management hindered by limited data. We deployed robust, low-cost low-power devices large-scale measurement campaign characterized within-city variations fine particulate matter (PM
Abstract Road traffic has become the leading source of air pollution in fast-growing sub-Saharan African cities. Yet, there is a dearth robust city-wide data for understanding space-time variations and inequalities combustion related emissions exposures. We combined nitrogen dioxide (NO 2 ) nitric oxide (NO) measurement from 134 locations Greater Accra Metropolitan Area (GAMA), with geographical, meteorological, population factors spatio-temporal mixed effects models to predict NO...
Particulate matter (PM₂.₅ and PM₁₀) black carbon (BC) significantly affect climate public health, especially in rapidly urbanizing regions. This study examines the spatial temporal variations of PM₂.₅, PM₁₀, BC Greater Accra Metropolitan Area (GAMA), Ghana, from January to December 2021. Measurements were conducted at a busy, high-density residential site low-density background using two federal equivalent...
Introduction Air and noise pollution are emerging environmental health hazards in African cities, with potentially complex spatial temporal patterns. Limited local data a barrier to the formulation evaluation of policies reduce air pollution. Methods analysis We designed year-long measurement campaign characterise their sources at high-resolution within Greater Accra Metropolitan Area (GAMA), Ghana. Our design uses combination fixed (year-long, n=10) rotating (week-long, n =~130) sites,...
This study investigated the potential of using locally available municipal solid wastes (MSW) (such as food from restaurants, charcoal dust, coconut husk and shell, sawdust) feedstock to produce non-carbonized fuel briquettes. A low-cost briquetting machine sourced Alfaster Industries in Kenya served demonstrate concept. Using decomposed waste resulted briquettes with higher bulk density (+4%), greater net calorific value (+18%) lower burning rate (-24%), compared use regular waste. There...
Noise pollution is a growing environmental health concern in rapidly urbanizing sub-Saharan African (SSA) cities. However, limited city-wide data constitutes major barrier to investigating impacts as well implementing policy this population. As such, first of its kind study West Africa, we measured, modelled and predicted noise across the Greater Accra Metropolitan Area (GAMA) Ghana, evaluated inequalities exposures by socioeconomic factors. Specifically, measured at 146 locations with...
Advances in computer vision, driven by deep learning, allows for the inference of environmental pollution and its potential sources from images. The spatial temporal generalisability image-based models is crucial their real-world application, but currently understudied, particularly low-income countries where infrastructure measuring complex patterns limited modelling may therefore provide most utility. We employed convolutional neural networks (CNNs) two complementary classification models,...
There is a notable lack of continuous monitoring air pollutants in the Global South, especially for measuring chemical composition, due to high cost regulatory monitors. Using our previously developed low-cost method quantify black carbon (BC) fine particulate matter (PM2.5) by analyzing reflected red light from ambient particle deposits on glass fiber filters, we estimated hourly BC concentrations with filter tapes beta attenuation monitors (BAMs). measurements obtained through this were...
Abstract Urban noise pollution is an emerging public health concern in growing cities sub-Saharan Africa (SSA), but the sound environment SSA understudied. We leveraged a large-scale measurement campaign to characterize spatial and temporal patterns of measured levels sources Accra, Ghana. recorded audio clips at 146 representative locations, involving 7-days (136 locations) 1-year measurements between 2019 2020. calculated metrics intermittency analyzed recordings using pre-trained neural...
This work deals with the seasonal daily variation of operating temperature silicon solar panels under tropical atmospheric conditions, including high turbidity (Harmattan dust particles). Data was collected from March 2010 to July 2012 at Legon (0°11′08″ W, 5°39'04″ N) using a Davis wireless Vantage Pro2 Plus weather station monitored software WeatherLink®. While 'common outdoor' is usually set 45 °C, it has been observed that during harmattan season, panel can rise beyond 70°C.
Mission Statement: To promote the art and science of medicine betterment public health by publishing manuscripts interest relevance to internists practicing as generalists or medical subspecialists.
There is a notable lack of continuous monitoring air pollutants in the Global South, especially for measuring chemical composition, due to high cost regulatory monitors. Using our previously developed low-cost method quantify black carbon (BC) fine particulate matter (PM2.5) by analyzing reflected red light from ambient particle deposits on glass fiber filters, we estimated hourly BC concentrations with filter tapes Beta Attenuation Monitors (BAMs). measurements obtained through this were...