Search results for "REM"

High-spectral-resolution Fabry-Pérot interferometers overcome fundamental limitations of present volcanic gas remote sensing techniques

2023

Remote sensing (RS) of volcanic gases has become a central tool for studying volcanic activity. For instance, ultraviolet (UV) skylight spectroscopy with grating spectrographs (GS) enables SO2 (and, under favourable conditions, BrO) quantification in volcanic plumes from autonomous platforms at safe distances. These measurements can serve volcanic monitoring and they cover all stages of volcanic activity in long measurement time series, which substantially contributes to the refinement of theories on volcanic degassing. Infrared (IR) remote sensing techniques are able to measure further volcanic gases (e.g., HF, HCl, CO2, CO). However, the employed Fourier transform spectrometers (FTSs) are…

Aquatic macrophytes in status assessment and monitoring of boreal lakes

2012

Proposing a Novel Predictive Technique for Gully Erosion Susceptibility Mapping in Arid and Semi-arid Regions (Iran)

2019

© 2019 by the authors. Gully erosion is considered to be one of the main causes of land degradation in arid and semi-arid territories around the world. In this research, gully erosion susceptibility mapping was carried out in Semnan province (Iran) as a case study in which we tested the efficiency of the index of entropy (IoE), the Vlse Kriterijumska Optimizacija I Kompromisno Resenje (VIKOR) method, and their combination. Remote sensing and geographic information system (GIS) were used to reduce the time and costs needed for rapid assessment of gully erosion. Firstly, a gully erosion inventory map (GEIM) with 206 gully locations was obtained from various sources and randomly divided into t…

Fundamentals of Precision Agriculture

2023

Precision agriculture or precision farming is the targeted application of crop input according to the locally determined crop needs. Therefore, it is the geo-referenced application of crop inputs, whose rates should be those required by the crop. The most essential points of information about the topic being described are: overview; brief history of precision agriculture; theoretical basics of precision agriculture; precision agriculture cycle; geo-referenced measurement of within-field parameters; analysis and interpretation of geo-referenced data for mapping within-field parameters; spatially variable rate application of crop inputs; instruments for precision agriculture; current scenario…

Assessment of Sentinel-2-MSI Atmospheric Correction Processors and In Situ Spectrometry Waters Quality Algorithms

2022

The validation of algorithms developed from in situ reflectance to estimate water quality variables has the challenge of atmospheric correction (AC) when applied to satellite images. Estimating water quality variables from satellite images requires an accurate estimation of remote sensing reflectances (Rrs) which vary according to the AC applied. Validation processes for both Rrs and water quality algorithms were carried out, relating the in situ Rrs (convoluted to Sentinel-2-MSI spectral response function) with the satellite Rrs coming from different ACs (C2RCC, C2X, C2XC, and Polymer), and also relating the in situ water quality variable data with estimated water quality variable values, …

Coordinating action in technology-supported shared tasks: Virtual pointing as a situated practice for mobilizing a response

2021

Drawing on recordings of remote screen-based work meetings in Finland, this conversation analytic study investigates interactive properties of mouse cursor movements in technology-mediated shared tasks. The article illustrates how participants rely on features afforded by the input device in ways that divert from its pre-designed functions to accomplish virtual pointing gestures. These gestures serve as an organizational resource in the precursory phase of action, i.e. when a next on-screen action is observably made relevant. In this sequential environment, pointing by means of the tool is a collaborative resource: an embodied practice for sustaining co-orientation and advancing the sequent…

Darba vietas demokrātija un darbinieku labklājība teledarba kontekstā uzņēmumā PULP Magazine

2021

Pieaugošā sociālā vajadzība noteikt darbinieku labklājību par prioritāti prasa pragmatisku veidu, kā panākt labāku demokrātiju darba vietā mūsdienu kapitāla uzkrāšanas laikmeta robežās. Pētījuma mērķis ir izstrādāt priekšlikumus demokrātijas uzlabošanai darba vietā, izmantojot teledarba politiku. Rezultāts ir priekšlikumu kopums, kuru mērķis ir uzlabot demokrātiju darba vietā, izmantojot atbilstošu tāldarba politiku, vienlaikus uzlabojot darbinieku labklājību. Procesā netika atrasta statistiski nozīmīga saikne starp subjektīvo autonomiju, atbildību un sniegumu. Tālāk autore izstrādāja provizorisku teorētisku ietvaru, kurā darba demokrātija ir apvienota ar tāldarbu.

Fault diagnosis of induction motors broken rotor bars by pattern recognition based on noise cancelation

2014

Current signal monitoring (CSM) can be used as an effective tool for diagnosing broken rotor bars fault in induction motors. In this paper, fault diagnosis and classification based on artificial neural networks (ANNs) is done in two stages. In the first stage, a filter is designed to remove irrelevant fault components (such as noise) of current signals. The coefficients of the filter are obtained by least square (LS) algorithm. Then by extracting suitable time domain features from filter's output, a neural network is trained for fault classification. The output vector of this network is represented in one of four categories that includes healthy mode, a 5 mm crack on a bar, one broken bar, …

La porte Peyrine à Châteauponsac (Haute-Vienne) : une possible fortification de l’Antiquité tardive inédite ?

2019

1° In Limousin, our knowledge of ancient monumentalfuneral architecture has been given a new impetus forresearch during the past fifteen years thanks to the inventoryof large-stone blocks reused in civil and religious constructionsor even in later funeral arrangements.2° It is from this standpoint that the Châteauponsac sitehas been included where, in an urban landscape, a largeconcentration of examples of ancient architecture areconserved. Among the major facilities preserving in theirelevations a large number of these re-used stones is includedthe ancient Saint-Thyrse abbey church and the Porte Peyrine ,which unlike the neighbouring religious building, has so farbeen the subject of no spe…

Construire en pierre à Dijon (Bourgogne-France). Quelques réflexions sur les ressources et les matériaux de la construction urbaine à la fin du Moyen…

2020

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