Results 21 to 30 of about 519,874 (305)

Algorithms for the inversion of lidar signals: Rayleigh-Mie measurements in the stratosphere

open access: yesAnnals of Geophysics, 1999
We report the features and the performances of the algorithms, developed at the Lidar Station of L'Aquila, for retrieving atmospheric parameters and constituents from elastic lidar signals.
F. Masci
doaj   +1 more source

Minimum Makespan Multi-vehicle Dial-a-Ride [PDF]

open access: yes, 2009
Dial a ride problems consist of a metric space (denoting travel time between vertices) and a set of m objects represented as source-destination pairs, where each object requires to be moved from its source to destination vertex.
Goertz, Inge Li   +2 more
core   +8 more sources

Feasibility Study of Multi-Wavelength Differential Absorption LIDAR for CO2 Monitoring

open access: yesAtmosphere, 2016
To obtain a better understanding of carbon cycle and accurate climate prediction models, highly accurate and temporal resolution observation of atmospheric CO2 is necessary. Differential absorption LIDAR (DIAL) remote sensing is a promising technology to
Chengzhi Xiang   +5 more
doaj   +1 more source

Improved Bounds for Open Online Dial-a-Ride on the Line [PDF]

open access: yes, 2019
We consider the open, non-preemptive online Dial-a-Ride problem on the real line, where transportation requests appear over time and need to be served by a single server.
Birx, Alexander   +2 more
core   +2 more sources

Estimating microcredit impact with low take-up, contamination and inconsistent data. A replication study of Crépon, Devoto, Duflo, and Parienté (American Economic Journal: Applied Economics, 2015)

open access: yesInternational Journal for Re-Views in Empirical Economics, 2019
We replicate a flagship randomised control trial carried out in rural Morocco that showed substantial and significant impacts of microcredit on the assets, the outputs, the expenses and the profits of self-employment activities. The original results rely
Florent Bédécarrats   +3 more
doaj   +1 more source

Correction of Doppler-broadened Rayleigh backscattering effects in H2O dial measurements [PDF]

open access: yes, 1986
A general method of solutions for treating effects of Doppler-broadened Rayleigh backscattering in H2O Differential Absorption Lidar (DIAL) measurements are described and discussed. Errors in vertical DIAL measuremtns caused by this laser line broadening
Ansmann, A., Bosenberg, J.
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

NAOMI GAZL: A Multispecies DIAL Tested on the TADI Gas Leak Simulation Facility [PDF]

open access: yesEPJ Web of Conferences, 2020
We report on a direct detection differential absorption lidar (DIAL), designed for remote detection of CH4 and CO2. The system is based on a single-frequency optical parametric oscillator/amplifier system, tunable in the 1.57-1.65 µm range.
Dherbecourt Jean-Baptiste   +11 more
doaj   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

open access: yesFEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill   +4 more
wiley   +1 more source

Remote Measurements of Industrial CO2 Emissions Using a Ground-Based Differential Absorption Lidar in the 2 µm Wavelength Region

open access: yesRemote Sensing, 2023
Carbon dioxide (CO2) is a known greenhouse gas and one of the largest contributors to global warming in the Earth’s atmosphere. The remote detection and measurement of CO2 from industrial emissions are not routinely carried out and are typically ...
Neil Howes   +5 more
doaj   +1 more source

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