Results 131 to 140 of about 11,483,484 (290)

The Role of Nitrous Oxide (“Laughing Gas”) in DUID Cases and Its Impact on Driving Fitness

open access: yesDrug Testing and Analysis, EarlyView.
A total number of 39 cases of driving under the influence of nitrous oxide were investigated. Plasma concentrations of 0.22 to 17 mL/L (median:3.7 mL/L) were measured in blood samples withdrawn 38 to 144 min (median: 85 min) after control via Headspace‐GC–MS.
L. Lucuta   +4 more
wiley   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

open access: yesDeep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long   +4 more
wiley   +1 more source

Reinforcement learning‐enhanced adaptive sliding mode controller for underground articulated vehicles trajectory tracking

open access: yesDeep Underground Science and Engineering, EarlyView.
RL‐SMC couples a reinforcement learning agent with a sliding mode controller, where the agent online‐modulates the sliding mode parameters according to the vehicle's tracking state. A curvature‐aware preview term is further embedded to shift control from reactive correction to proactive maneuvering, enabling the articulated vehicle to anticipate sharp ...
Haoqi Yan   +5 more
wiley   +1 more source

Triboelectric–Electromagnetic Generator‐Enabled Hybrid Power Backpack for Self‐Powered Field Safety Management

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A lightweight hybrid backpack integrating SC‐TENGs and R‐EMGs harvests biomechanical energy during walking. With a low activation speed of 3 km h−1 and a high specific power of 0.18 W kg−1, it enables self‐powered field safety management. The power backpack refers to an energy‐harvesting solution engineered to mitigate battery reliance in wearable ...
Jie Chen   +6 more
wiley   +1 more source

Synergising Climate and Clean Air Governance in the EU: A Multilevel Analysis of Policy Integration

open access: yesEnvironmental Policy and Governance, EarlyView.
ABSTRACT Unlocking synergies while avoiding trade‐offs between climate and air pollution mitigation is key to policy effectiveness and cost‐efficiency. For maximum effect, these policies must be integrated not only horizontally within a governance level but also vertically across them.
Niklas Löther
wiley   +1 more source

Assessment of the effects of microwave‐produced biodiesel blends on electric generator performance and emissions

open access: yesEnvironmental Progress &Sustainable Energy, EarlyView.
Abstract Biodiesels are emerging as alternatives to diesel fuel. However, to be a feasible solution, biodiesels must meet strict criteria including high efficiency and minimal environmental impact. The current study focuses on evaluating ethyl ester biodiesel and its blends with diesel fuel to assess their potential.
Ilham Yahya   +6 more
wiley   +1 more source

Effects of hybrid metal oxide nanoparticles on the tribological and emission attributes of algae‐derived biofuel in compression ignition engines

open access: yesEnvironmental Progress &Sustainable Energy, EarlyView.
Abstract The growing demand for sustainable fuels has accelerated the development of algae‐derived biodiesel for compression‐ignition engines. In this study, Chlorella vulgaris methyl ester (AME) exhibited physicochemical properties comparable to diesel and satisfied ASTM D6751 fuel quality requirements, making it suitable for blending.
T. Jayakumar   +3 more
wiley   +1 more source

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