An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
aerosols; air pollution; case studies; dust; rain; China
Abstract:
... Fugitive road dust (FRD) contributes a great deal to urban rainwater and air pollution and is commonly controlled by water-sprinkling in most Chinese cities. However, there is a lack of information on its effectiveness. We used the Testing Re-entrained Aerosol Kinetic Emissions from Roads (TRAKER) method to monitor different types of roads in Baoding city before and within 1 hr after water-sprinkl ...
Bayesian theory; Markov chain; Monte Carlo method; carbon; case studies; data collection; energy efficiency; heat; models; China
Abstract:
... Urban-scale energy model can be a crucial tool for evaluating and in turn propelling the implementation of energy efficiency and low carbon programs for buildings and cites. A variety of disputes on integrity and correctness lie in basic statistical data of China's building energy use. Inadequate information and performance gap caused by input uncertainties are the common obstacles to produce reli ...
Bayesian theory; case studies; climate; data collection; decision making; expert opinion; flood damage; land use; models; probability; risk management; rivers
Abstract:
... Extreme weather and climate related events, from river flooding to droughts and tropical cyclones, are likely to become both more severe and more frequent in the coming decades, and the damages caused by these events will be felt across all sectors of society. In the face of this threat, policy- and decision-makers are increasingly calling for new approaches and tools to support risk management an ...
accelerometers; biometry; case studies; flocks; health status; standard deviation
Abstract:
... Sensor technologies can identify modified animal activity indicating changes in health status. This study investigated sheep behavior before and after illness caused by mold-contaminated feed using tri-axial accelerometers. Ten ewes were fitted with HerdDogg biometric accelerometers. Five ewes were concurrently fitted with Axivity AX3 accelerometers. The flock was exposed to mold-contaminated feed ...
agricultural industry; case studies; computer software; data collection; energy density; equipment; heat; latent heat; phase transition; prototypes; simulation models; thermal energy; wastes
Abstract:
... The development of thermal energy storage solutions (TES) in agroindustry allows reduction of production costs and improvement of operation sustainability. Such solutions require high storage capacity and the ability to adapt to existing equipment. The use of phase change materials (PCMs), which are able to store thermal energy as latent heat, creates new opportunities for heat storage solutions ( ...
... Microbiodiversity is usually correlated with environmental conditions. This investigation is a case study to cover the lack of knowledge on the correlation of biochemical, physiological, and molecular attributes with the distribution of seed-borne pathogenic fungi of maize under the environmental conditions of the Kingdom of Saudi Arabia to help forecast any destructive epidemics. Forty-one fungal ...
agriculture; case studies; data quality; farm management; models; questionnaires; small farms
Abstract:
... Farm Management Information Systems (FMIS) assists farmers in managing their farms more effectively and efficiently. However, the use of FMIS to support crop cultivation is, at the present time, relatively expensive for smallholder farmers. Due to some handicaps, providing an FMIS that is suitable for small-holder farmers is a challenge. To analyze this gap, this study followed 3 steps, namely: (1 ...
case studies; equations; models; research; rivers; uncertainty; water; China
Abstract:
... Flood routing is a critical component of real‐time flood forecasting and plays a pivotal role in reducing economic and life losses due to flooding. However, flood routing always possesses errors because it is affected by various sources of uncertainty, which are transmitted and accumulated in the routing process from upstream to downstream, particularly for long or complex river systems. Thus, a r ...
... Modeling network‐scale sediment (dis)connectivity and its response to anthropic pressures provides a baseline understanding of river processes and sediment dynamics that can be used to forecast future hydro‐morphological changes in river basins. However, this requires a solid understanding of how a system is currently operating, and how it operated in the past. We present the basin‐scale, dynamic ...
algorithms; automation; case studies; climate change; multivariate analysis; rivers; snowpack; surface water; temperature; time series analysis; vegetation; South Asia
Abstract:
... The analysis of the Earth system and interactions among its spheres is increasingly important to improve the understanding of global environmental change. In this regard, Earth observation (EO) is a valuable tool for monitoring of long term changes over the land surface and its features. Although investigations commonly study environmental change by means of a single EO-based land surface variable ...
anaerobic digestion; case studies; energy; energy recovery; fossil fuels; fuzzy logic; guidelines; landfills; municipal solid waste; power plants; Iran
Abstract:
... The aim of this study was to find the best location for municipal solid waste (MSW)-based power plant and landfill. Another goal was to investigate the energy recovery potential of MSW by anaerobic digestion and recycling process. A combination of multi-criteria fuzzy decision making system was applied in GIS environment to select the most suitable site for MSW-based power plant and landfill. The ...
altitude; autumn; case studies; data collection; hydrology; models; rain; regression analysis; satellites; spring; summer; water vapor; China
Abstract:
... Accurate precipitation data are crucial for hydrological, meteorological, and ecological research. However, it is difficult to obtain high-precision and high-resolution spatiotemporal distributions of precipitation in remote mountain regions with complex topography and sparse rain gauges. In addition, the spatial resolutions of existing satellite precipitation products are too coarse to apply them ...
... Environmental considerations have become a significant issue in the design of supply chain networks due to today's increasing globalization trends. Therefore, supply chain network design needs to be managed in an efficient way to deal with the complex networks involved. The aim of this article is to present a multi-objective optimization model for a green dual-channel supply chain network that han ...
... Accurate cloud-masking procedures to distinguish cloud-free pixels from cloudy pixels are essential for optical satellite remote sensing. Many studies on satellite-based cloud-detection have been performed using the spectral characteristics of clouds in terms of reflectance and temperature. This study proposes a cloud-detection method using reflectance in four bands: 0.56 μm, 0.86 μm, 1.38 μm, and ...
David T. Allen; Felipe J. Cardoso-Saldaña; Yosuke Kimura; Qining Chen; Zhanhong Xiang; Daniel Zimmerle; Clay Bell; Chris Lute; Jerry Duggan; Matthew Harrison
case studies; environment; liquids; methane production; models; oils
Abstract:
... In comparing observation based methane emission estimates for oil and gas well sites to routine emissions reported in inventories, the time scale of the measurement should match the time scale over which the inventoried emissions are estimated. Since many measurements are of relatively short duration (seconds to hours), a tool is needed to estimate emissions over these time scales rather than the ...
case studies; decision making; diet; humans; labor; pollution; quantitative analysis; risk; surface water; urbanization; water quality
Abstract:
... Water is an important factor in human survival and development. With the acceleration of urbanization, the problem of black and odorous water bodies has become increasingly prominent. It not only affects the living environment of residents in the city, but also threatens their diet and water quality. Therefore, the accurate monitoring and management of urban black and odorous water bodies is parti ...
Clostridium perfringens; case studies; desorption; digestive tract; eggs; farms; financial economics; genetic relationships; hatcheries; mass spectrometry; mortality; mucosa; necrotic enteritis; small intestine; Mississippi
Abstract:
... Necrotic enteritis (NE) is an important intestinal disease of commercial poultry associated with poor performance, high mortality, and significant economic loss. In this case report, a novel presentation of NE is described in young broilers. Initially, affected farms presented with a moderate increase in mortality at or before 19 days of age. Farms experiencing the disease syndrome belonged to two ...
case studies; data collection; model validation; neural networks; poverty; spatial data; sustainable development; China; Yangtze River
Abstract:
... The UN 2030 Agenda sets poverty eradication as the primary goal of sustainable development. An accurate measurement of poverty is a critical input to the quality and efficiency of poverty alleviation in rural areas. However, poverty, as a geographical phenomenon, inevitably has a spatial correlation. Neglecting the spatial correlation between areas in poverty measurements will hamper efforts to im ...
case studies; ecosystems; environmental health; models; risk assessment; sewage; socioeconomic factors; water; water quality; watersheds; China
Abstract:
... The DPSIR model is a conceptual model established by the European Environment Agency to solve environmental problems. It provides an overall framework for analysis of environmental problems from five aspects: driving force (D), pressure (P), state (S), impact (I), and response (R). Through use of the DPSIR model framework, this paper presents the SEEC model approach for evaluating watershed ecolog ...
case studies; data collection; scientists; Nigeria
Abstract:
... Understanding how useful any particular set of event data might be for conflict research requires appropriate methods for assessing validity when ground truth data about the population of interest do not exist. We argue that a total error framework can provide better leverage on these critical questions than previous methods have been able to deliver. We first define a total event data error appro ...
... We developed a method for implicit solvent molecular dynamics simulations of proteins in solvent mixtures (model with implicit solvation thermodynamics, MIST). The MIST method introduces experimental group transfer free energies to the generalized Born formulation for generating molecular trajectories without the need for developing rigorous explicit-solvent force fields for multicomponent solutio ...
COVID-19 infection; case studies; decision making; environmental exposure; humans; pandemic; people; questionnaires; risk; spatial data; China
Abstract:
... Environmental exposure of people plays an important role in assessing the quality of human life. The most existing methods that estimate the environmental exposure either focus on the individual level or do not consider human mobility. This paper adopts a vector field generated from the observed locations of human activities to model the environmental exposure at the population level. An improved ...
case studies; disaster preparedness; environment; expert opinion; prediction; risk management; water analysis; Italy; South Africa
Abstract:
... Numerical runout models are important tools for predicting the potential downstream impacts of tailings dam breaches that generate tailings flows, which is a crucial step in emergency preparedness and planning, and risk management. Most existing runout models were originally developed for the analysis of water floods or flow-like landslides (e.g. debris flows). In this study, we back-analyze two w ...
Internet; Landsat; algorithms; case studies; cropland; forests; grasslands; issues and policy; land cover; land use; probability; shrublands; time series analysis; watersheds; China
Abstract:
... Constructed land, cropland, and ecological land are undergoing intense competition in many rapidly-developing regions. One of the major reasons to cause frequent land use (LU) conversions is the policy dynamics. The detection of such conversions is thus a prerequisite to understanding urban dynamics and how policies shape landscapes. This paper presents a bi-directional strategy to detect the LU c ...
... Efforts to improve water quality of eutrophic ponds often involve implementing changes to watershed management practices to reduce external nutrient loads. While this is required for long-term recovery and prevention, eutrophic conditions are often sustained through the recycling of internal nutrients already present within the waterbody. In particular, internal phosphorus bound to organic materia ...
carbon; carbon dioxide; case studies; energy flow; industry; iron; pulverized coal; steel
Abstract:
... In the context of carbon neutrality, accurate carbon accounting is urgently needed for energy-intensive industries, such as the iron and steel industry. However, methods based on black-box models are rather rough and the impact of changes in a certain material and energy flow on the carbon flows of the complex production process is unclear, making it impossible to find carbon emission reduction po ...
... A 5-year-old healthy pluriparous pregnant Flat-coated Retriever bitch was monitored by ultrasound on post-ovulation days 30 and 57: no deviation from normality picture were observed. On day 60, one of the three most caudal fetuses showed ultrasonographic signs of fetal anasarca: subcutaneous edema and anechoic fluid in thoracic and abdominal cavities. There was an increased volume of extra-fetal f ...
Ayurvedic medicine; case studies; drug toxicity; headache; massage; oils; patients; women
Abstract:
... A 62 year old woman diagnosed with Ménière's disease, who underwent vairechanika nasya (VN) with shadbindu taila presented with short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) like phenomena immediately after the procedure. Rescue measures of abhyanga (local oil massage) and nadi sweda (local fomentation) were administered. Within half an hour ...
Leobardo Serrano-Carreón; Sergio Aranda-Ocampo; Karina A. Balderas-Ruíz; Antonio M. Juárez; Edibel Leyva; Mauricio A. Trujillo-Roldán; Norma A. Valdez-Cruz; Enrique Galindo
... Protected agriculture (PA) is an alternative allowing the control of environmental variables to produce healthy vegetables. Biofertilizers and biofungicides can reduce the chemical load of pesticides. There is abundant literature documenting individual aspects, such as control of environmental variables, irrigation, biological control, and costs assessments. However, there are no reports documenti ...
aerosols; case studies; hydrolysis; metropolitan areas; model validation; models; nitrates; nitrogen; photochemistry; pollution; prediction; research; troposphere; winter
Abstract:
... Heterogeneous hydrolysis of dinitrogen pentoxide (N₂O₅) plays an important role in nighttime nitrate (NO₃⁻) formation in urban areas, and sometimes influences the occurrence of heavy PM₂.₅ pollution the next day in the Seoul Metropolitan Area (SMA), Korea. Here, we discuss the heavy PM₂.₅ wintertime episode of January 13–15, 2018, which was mainly induced by nighttime N₂O₅ heterogeneous reaction i ...
algal blooms; case studies; chlorophyll; hurricanes; marine science; phytoplankton; satellites
Abstract:
... During the passage of tropical cyclone (TC) ARB O1, a westward transport of Chlorophyll-a (Chl-a) enhancement was identified south of the Indian Peninsula. The features and underlying dynamics were investigated with high-resolution satellite remote sensing, reanalysis, and Argo buoy data. From January 12 to January 19, 2006, the phytoplankton bloom propagated westward with two ocean anticyclonic e ...
case studies; combustion; dust; health effects assessments; ingestion; models; pollution; principal component analysis; risk; wood
Abstract:
... This study was conducted in order to obtain the first insight into the occurrence, potential sources, and health risks of polycyclic aromatic hydrocarbons (PAHs) in indoor dust. Samples (n = 47) were collected from households in four settlements in the northern Serbian province of Vojvodina. Total concentrations of 16 EPA priority PAHs in the dust samples varied from 140 to 8265 μg kg⁻¹. Mean and ...
case studies; climatology; cooperative research; environmental science; evolution; harness; interdisciplinary research; issues and policy; ownership; research projects; stakeholders
Abstract:
... Addressing complex environmental and health questions requires research collaborations. Such collaborations harness diverse expertise and perspectives from various researchers, practitioners, stakeholders, and knowledge-users to ground and enhance the depth and breadth of research and promote translational efforts towards policymaking. There is growing interest and need to understand what shapes t ...
... Garlic, also known as Allium sativum, is common to many kitchens around the world and has been used for thousands of years. Its proposed benefits are widely circulated, though little is known about its adverse effects. This case report aims to highlight a possible association between the consumption of raw garlic and the increased chance of bleeding. A detailed analysis of a patient’s case was per ...
case studies; environment; fluorescence; freshwater; microbial activity; nitrates; phosphates; plate count; urban areas; water quality; India
Abstract:
... The quality and health of many of our vital freshwater systems are poor. To tackle this with ever increasing pressures from anthropogenic and climatic changes, we must improve water quality monitoring and devise and implement more appropriate water quality parameters. Recent research has highlighted the potential for Peak T fluorescence (tryptophan-like fluorescence, TLF) to monitor microbial acti ...
algorithms; case studies; data collection; fuzzy logic; neural networks; oil fields; system optimization; Iran
Abstract:
... Petrophysical properties determination of a reservoir such as shear wave velocity plays a crucial role in exploration and production management. The purpose of this study is to develop a robust committee machine model for estimating fast and slow shear wave velocities from petrophysical logs. To this end, appropriate inputs were determined and different algorithms including artificial neural netwo ...
algorithms; batteries; capital costs; carbon dioxide; case studies; comparative study; discount rate; electricity; energy conversion; energy costs; probability; Cameroon
Abstract:
... Hybrid grid-connected systems appear as promising concept to tackle the problem of electricity blackouts in many localities around the world. In this paper four different options of backup systems connected to the grid under severe electricity blackouts are studied and compared for household energy supply in developing countries. The far north region of Cameroon has been chosen as case study. A do ...
case studies; comparative study; corporate social responsibility; electronic wastes; pollution; producer responsibility; profitability; research; stakeholders; Europe
Abstract:
... We are facing the challenge of rapid growth in waste from electrical products (e-waste). In Europe, handling e-waste is regulated by the European Waste Electrical and Electronic Equipment (WEEE) directive, which is based on the extended producer responsibility (EPR) model as a regulatory tool forcing manufacturers and importers to take responsibility for their products throughout their lifecycles. ...
... Establishing proper neighbor relations between a set of spatial units under analysis is essential when carrying out a spatial or spatio-temporal analysis. However, it is usual that researchers choose some of the most typical (and simple) neighborhood structures, such as the first-order contiguity matrix, without exploring other options. In this paper, we compare the performance of different neighb ...
case studies; ecosystems; focus groups; forests; poverty; social welfare; Bangladesh
Abstract:
... Ecosystem-dependent communities (EDCs) rely on ecosystem services for their wellbeing in many ways, but there is a lack of robust metrics to estimate their human wellbeing in a multi-dimensional manner. Existing approaches are not tailored to EDCs, hence failing to adequately reflect their distinct characteristics and strong links to social-ecological systems. We used the domains of human wellbein ...
batteries; case studies; electric vehicles; electricity; energy; management systems; power generation; renewable energy sources; tariffs; wholesale marketing
Abstract:
... Demand response programs are essential to enable accommodating larger shares of variable power generation based on renewable sources, the deployment of which is imperative for decarbonizing the economy and mitigating global warming. Consumers/prosumers are increasingly exposed to and may benefit from time-differentiated energy prices aimed to induce changes in regular consumption patterns. These c ...
carbon; carbon dioxide; case studies; climate change; energy; flue gas; fuel cells; greenhouse gases; heat; industrial sites; industrial symbiosis; methanol; mineralization; South Africa
Abstract:
... Removing anthropogenic carbon dioxide emissions from existing industrial sites is essential to slow down climate change. A multipronged approach is required to reduce the carbon dioxide footprint of an existing industrial site by including carbon dioxide capture and utilisation, industrial symbiosis, heat integration and the introduction of renewable power sources. This work extends the current sy ...
... Here, we present an improved water quality index (WQI) model for assessment of coastal water quality using Cork Harbour, Ireland, as the case study. The model involves the usual four WQI components – selection of water quality indicators for inclusion, sub-indexing of indicator values, sub-index weighting and sub-index aggregation – with improvements to make the approach more objective and data-dr ...
air quality; case studies; environment; hospitals; humans; nitrogen dioxide; particulates; pollutants; seasonal variation
Abstract:
... Long term, continuous indoor and outdoor pollutant monitoring was evaluated from a case study hospital, school, office and 18 apartments in the UK. Data was examined in order to explore the dynamic behaviour of indoor-outdoor ratios (I/O) for both particulate matter and nitrogen dioxide. Traditionally I/O ratios have been determined as single aggregate values or static parameters, from passive sam ...
artificial intelligence; case studies; economic dispatch; electricity; energy; natural gas; probability distribution; system optimization; uncertainty; wind; wind power
Abstract:
... With growing penetrations of wind power in electricity systems, the coordinated dispatch of integrated electricity and natural gas systems is becoming a popular research topic. Distributionally robust optimization can cope with the wind uncertainty of integrated electricity and natural gas systems by providing optimal solutions for the worst-case probability distribution. However, limited historic ...
USDA; agriculture; case studies; electronics; image analysis; irrigated farming; irrigation systems; land use; model validation; models; water management; Idaho
Abstract:
... Effective water management requires a large-scale understanding of agricultural irrigation systems and how they shift in response to various stressors. Here, we leveraged advances in Machine Learning and availability of very high resolution remote sensing imagery to help resolve this long-standing issue. To this end, we developed a deep learning model to classify irrigation systems at a regional s ...
agricultural land; case studies; conflict management; environmental management; issues and policy; land use; models; occupations; urbanization
Abstract:
... Spatial conflicts are formed in the process of urbanization and become the primary drivers of urban ecological and environmental problems. The defining trait of a spatial conflict is the occupation of ecological or agricultural spaces by construction spaces. This work presents a classification scheme for spatial conflicts in China, including source-area conflicts, corridor conflicts, safety confli ...
... A large amount of greenhouse gases is emitted from the dairy industry in Canada. Actions must be taken to achieve Canada's environmental goals of decreasing greenhouse gas (GHG) emissions by 30% below 2005 levels by 2030. Dietary management plays an important role in reducing such emission in dairy cattle production for current and future climate change conditions. In this study, a factorial inter ...
biogeography; case studies; equilibrium theory; extinction; humans; models; species richness; statistics; time series analysis
Abstract:
... AIM: In an age of increased anthropogenic changes, it is crucially important to understand how and why ecological communities change. Community assembly is governed by colonization and extinction processes, and the simplest model describing it is dynamic equilibrium (DE), which assumes that communities are shaped solely by stochastic colonization and extinction events. Deviations from this model c ...
carbon; carbon footprint; case studies; concrete; industry; models; transportation
Abstract:
... There are numerous strategies that can be used to reduce the embodied carbon footprint of real property investments, many of which can be accomplished for no additional cost and with minimal performance impacts. This study aims to propose the incorporation of the life cycle carbon quantification into the government procurement of real property process in order to reach out to low-carbon durable an ...