Results 61 to 70 of about 15,197 (273)

Undrained Shear Strength of Unsaturated Soils under Zero or Low Confining Pressures in the Vadose Zone

Vadose Zone Journal, 2018
In geotechnical engineering practice, many projects such as stability analysis of slopes or trenches and pavement design involve soils in vadose zones at shallow depths, where soils are under unsaturated conditions. For these types of projects, undrained
Won Taek Oh, Sai Vanapalli
doaj   +1 more source

Implications of heterogeneous embankment conditions for geoelectrical investigations on dams: A case study at Mactaquac Dam, Canada

Near Surface Geophysics, EarlyView.
Abstract Electrical resistivity tomography (ERT) has been shown to be effective for surveying and monitoring dams, due to the method's sensitivity to moisture content and relevant physical properties (e.g., porosity). Automated ERT systems, capable of time‐lapse monitoring, can be used to detect variations in ground conditions.
John S. Ball, Karl E. Butler, Jonathan E. Chambers, Paul B. Wilkinson, Andrew Binley   +4 more
wiley   +1 more source

Impact of Fire and Heat Stress on Soil Microorganisms: A Review of Community Changes, Molecular Responses and Plant-Beneficial Roles. [PDF]

Environ Microbiol Rep
This work reviewed the direct and indirect effects of fires on microbial communities and the resilience strategies microbes use to withstand high temperatures . ABSTRACT Fire, whether occurring on the surface or underground, significantly influences soil microbial dynamics by reshaping community composition, functional diversity and overall soil and ...
Orozco-Mosqueda MDC, Flores-Piña A, Kumar A, Parra-Cota FI, de Los Santos-Villalobos S, Mitra D, Babalola OO, Santoyo G.   +7 more
europepmc   +2 more sources

Effect of recycling on mechanical and physical properties of polycarbonate/acrylonitrile–butadiene–styrene/poly(methyl methacrylate) (PC/ABS/PMMA) blends

Polymer International, EarlyView.
The 100% recycling of optimal polycarbonate/acrylonitrile–butadiene–styrene/poly(methyl methacrylate) (PC/ABS/PMMA) blends, identified through the mixture design, over multiple successive cycles provides valuable insights into their life cycle. Subsequently, chemical, rheological, thermal and mechanical characterizations will be carried out to evaluate
Rahma Ezzeddine, Karama Elfehri, Ángel Marcos‐Fernández, Basma Samet   +3 more
wiley   +1 more source

Stability of 3D tunnel face under steady unsaturated seepage coupled multi-layer soil suction head distributions

Alexandria Engineering Journal
This paper proposes a new discrete approach for analyzing tunnel face stability in stratified soils under unsaturated seepage conditions. Traditional methods have primarily focused on homogeneous soils, neglecting the spatial variability of unsaturated ...
Huanjiang Wu, Hong Liao, Chaoguang Wu
doaj   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, EarlyView.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

Subsurface Investigations of Cryo‐Hydrogeological Features in a High Arctic Catchment Under Transition

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT In this study, the internal structure and seasonal variations of cryo‐hydrogeological features were investigated in the Fuglebekken catchment, located near the Polish Polar Station Hornsund in Svalbard. Over a few years, rising air temperatures and intensified water circulation have significantly altered the distribution, extent, and state of ...
Wawrzyniak Tomasz, Oryński Szymon, Marciniak Artur, Osuch Marzena   +3 more
wiley   +1 more source

SYN‐A, a naturally derived synergist, restores pyrethroid efficacy against cabbage stem flea beetle but negatively impacts its parasitoid Microctonus brassicae

Pest Management Science, EarlyView.
SYN‐A, a naturally derived synergist, inhibited key metabolic pathways associated with pyrethroid insecticide resistance in cabbage stem flea beetle (CSFB) and its parasitoid Microctonus brassicae. SYN‐A restored pyrethroid efficacy against resistant CSFB allowing up to 80% reduction in application rates.
Patricia A. Ortega‐Ramos, Graham D. Moores, Samantha M. Cook   +2 more
wiley   +1 more source

Strategic Design of Public Food Procurement to Leverage Positive Food Systems Outcomes: A Framework of Actions

Sustainable Development, EarlyView.
ABSTRACT There is substantial potential for the procurement of food by public institutions to contribute to Sustainable Development across multiple environmental, social, and economic outcomes. In this study we used theories of policy instrumentation and learning to analyse global guidance for designing public food procurement instruments to leverage ...
Erica Reeve, Carolina Venegas Hargous, Penny Farrell, Dori Patay, Holly Rippin, Anna Roesler, Anna Peeters, Anne Marie Thow   +7 more
wiley   +1 more source

Burgers-type empirical creep model for unsaturated soil considering matric suction

Shenzhen Daxue xuebao. Ligong ban
Reservoir bank slopes are often in an unsaturated state due to water level fluctuations and atmospheric precipitation, which can easily trigger landslides. Therefore, it is necessary to develop a creep model for unsaturated soils that accounts for matric
DONG Li, HUANG Haifeng, XU Lie, SU Haiwei, WU Zhiyong   +4 more
doaj   +1 more source