Results 1 to 10 of about 3,576,631 (161)

South Pole Station ozonesondes: variability and trends in the springtime Antarctic ozone hole 1986–2021 [PDF]

open access: yesAtmospheric Chemistry and Physics, 2023
Balloon-borne ozonesondes launched weekly from South Pole Station (1986–2021) measure high-vertical-resolution profiles of ozone and temperature from the surface to 30–35 km altitude.
B. J. Johnson   +12 more
doaj   +1 more source

A type of symmetrical differential lever displacement amplification mechanism

open access: yesMechanics & Industry, 2021
The paper proposes a type of symmetrical flexure hinge displacement amplification mechanism, which is based on the differential lever to effectively improve the displacement output stroke of the PZT and reduce the additional displacement.
Fan Wei   +3 more
doaj   +1 more source

CarbonTracker-CH4: an assimilation system for estimating emissions of atmospheric methane [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
We describe an assimilation system for atmospheric methane (CH4), CarbonTracker-CH4, and demonstrate the diagnostic value of global or zonally averaged CH4 abundances for evaluating the results.
L. Bruhwiler   +8 more
doaj   +1 more source

Response of Bare Soil Respiration to Air and Soil Temperature Variations According to Different Models: A Case Study of an Urban Grassland

open access: yesLand, 2023
Soil respiration is an important component of the global carbon cycle and is highly responsive to disturbances in the environment. Human impacts on the terrestrial ecosystem lead to changes in the environmental conditions, and following this, changes in ...
Egor A. Dyukarev, Sergey A. Kurakov
doaj   +1 more source

SCOUR MONITORING SYSTEM

open access: yesProceedings of the 39th IAHR World Congress, 2022
Monitoring system is essential for improving the understanding of scour processes next to structures built in the riverine environment. State-of-the-art review shows a lack of field scour measurements due to expensive specialized equipment, time-consuming surveys, and difficulties in data acquirement during floods.
Fliszar, Robert   +3 more
openaire   +1 more source

Research on Waste Plastics Classification Method Based on Multi-Scale Feature Fusion

open access: yesSensors, 2022
Microplastic particles produced by non-degradable waste plastic bottles have a critical impact on the environment. Reasonable recycling is a premise that protects the environment and improves economic benefits. In this paper, a multi-scale feature fusion
Zhenxing Cai   +5 more
doaj   +1 more source

Numerical study on instantaneous heat transfer characteristics of AC arc-fault

open access: yesAIP Advances, 2021
Studying the heat transfer characteristics of alternating current (AC) arc-fault to electrodes is a key issue in electrical fires. In this paper, an instantaneous heat transfer numerical model of AC arc-fault is developed based on the magneto ...
Qirong Wu   +4 more
doaj   +1 more source

GPU-HADVPPM V1.0: a high-efficiency parallel GPU design of the piecewise parabolic method (PPM) for horizontal advection in an air quality model (CAMx V6.10) [PDF]

open access: yesGeoscientific Model Development, 2023
With semiconductor technology gradually approaching its physical and thermal limits, graphics processing units (GPUs) are becoming an attractive solution for many scientific applications due to their high performance.
K. Cao   +7 more
doaj   +1 more source

Constraints on emissions of carbon monoxide, methane, and a suite of hydrocarbons in the Colorado Front Range using observations of 14CO2 [PDF]

open access: yesAtmospheric Chemistry and Physics, 2013
Atmospheric radiocarbon (14C) represents an important observational constraint on emissions of fossil-fuel derived carbon into the atmosphere due to the absence of 14C in fossil fuel reservoirs.
B. W. LaFranchi   +16 more
doaj   +1 more source

Monitoring distributed systems [PDF]

open access: yesACM Transactions on Computer Systems, 1987
The monitoring of distributed systems involves the collection, interpretation, and display of information concerning the interactions among concurrently executing processes. This information and its display can support the debugging, testing, performance evaluation, and dynamic documentation of distributed systems.
Jeffrey Joyce   +3 more
openaire   +1 more source

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