Search results for "observation"
showing 10 items of 1586 documents
Gridding artifacts on medium-resolution satellite image time series: MERIS case study
2011
Earth observation satellites provide a valuable source of data which when conveniently processed can be used to better understand the Earth system dynamics. In this regard, one of the prerequisites for the analysis of satellite image time series is that the images are spatially coregistered so that the resulting multitemporal pixel entities offer a true temporal view of the area under study. This implies that all the observations must be mapped to a common system of grid cells. This process is known as gridding and, in practice, two common grids can be used as a reference: 1) a grid defined by some kind of external data set (e.g., an existing land-cover map) or 2) a grid defined by one of t…
Clause de réserve de propriété. Inclusion du bien dans un plan de cession, Créance de l'article 40 au profit du vendeur revendiquant (oui)
1994
International audience; (Com. 9 juin 1992, Sté Creusot-Loire Industrie c/, Sté Sud Marine et autres)
Article 40. Créance née entre le jugement arrêtant le plan de cession et la liquidation judiciaire consécutive à la résolution du plan de cession, Or…
1996
International audience; (Com. 6 déc. 1994, Guyot ès qual. c/ Banque Paribas)
Article 40. Plan de cession, Prise de possession anticipée de l'entreprise par le cessionnaire, Résolution du plan, Effets, Créances nées du chef du …
1997
International audience; (Com. 28 janv. 1997, Contant ès qual. et autres c/ Soc. Chapsol et autres)
INTEGRAL/SPI ground calibration
2003
Three calibration campaigns of the spectrometer SPI have been performed before launch in order to determine the instrument characteristics, such as the effective detection area, the spectral resolution and the angular resolution. Absolute determination of the effective area has been obtained from simulations and measurements. At 1 MeV, the effective area is 65 cm^2 for a point source on the optical axis, the spectral resolution ~2.3 keV. The angular resolution is better than 2.5 deg and the source separation capability about 1 deg. Some temperature dependant parameters will require permanent in-flight calibration.
Combining hectometric and decametric satellite observations to provide near real time decametric FAPAR product
2017
Abstract A wide range of ecological, agricultural, hydrological and meteorological applications at local to regional scales requires decametric biophysical data. However, before the launch of SENTINEL-2A, only few decametric products are produced and most of them remain limited by the small number of available observations, mostly due to a moderate revisit frequency combined with cloud occurrence. Conversely, kilometric and hectometric biophysical products are now widely available with almost complete and continuous coverage, but the associated spatial resolution limits the application over heterogeneous landscapes. The objective of this study is to combine unfrequent decametric spatial res…
Observations of molecular hydrogen mixing ratio and stable isotopic composition at the Cabauw tall tower in the Netherlands
2016
AbstractMeasurements of the stable isotopic composition (δD(H2) or δD) of atmospheric molecular hydrogen (H2) are a useful addition to mixing ratio (χ(H2)) measurements for understanding the atmospheric H2 cycle. δD datasets published so far consist mostly of observations at background locations. We complement these with observations from the Cabauw tall tower at the CESAR site, situated in a densely populated region of the Netherlands. Our measurements show a large anthropogenic influence on the local H2 cycle, with frequently occurring pollution events that are characterized by χ(H2) values that reach up to ≈1 ppm and low δD values. An isotopic source signature analysis yields an apparent…
Polynomial Regression and Measurement Error
2020
Many of the phenomena of interest in information systems (IS) research are nonlinear, and it has consequently been recognized that by applying linear statistical models (e.g., linear regression), we may ignore important aspects of these phenomena. To address this issue, IS researchers are increasingly applying nonlinear models to their datasets. One popular analytical technique for the modeling and analysis of nonlinear relationships is polynomial regression, which in its simplest form fits a "U-shaped" curve to the data. However, the use of polynomial regression can be problematic when the independent variables are contaminated with measurement error, and the implications of error can be m…
COPD in elderly patients – an analysis of the DACCORD observational study
2018
Introduction: In elderly patients COPD is frequently complicated by the presence of several comorbidities and the many non-COPD-related medications prescribed to treat these conditions. This analysis aims to characterize COPD patients above the age of 75 in a real-world cohort in Germany. Methods: DACCORD is a prospective, non-interventional study collecting data from COPD patients treated in primary and secondary care. Prior to study entry, patients either initiated or changed COPD maintenance medication. Moderate/severe exacerbations, COPD-medication and non-COPD medication were documented at baseline and every 3 months. Comorbidities were documented at baseline. Results: Baseline charact…
Cost-effectiveness of psychotropic polypharmacy in routine schizophrenia care. Results of the ELAN prospective observational trial
2018
Abstract Aims To analyse the costs and cost-effectiveness of psychotropic polypharmacy in comparison to antipsychotic monotherapy in patients with schizophrenia and schizo-affective disorder under real-world treatment conditions. Methods A prospective observational study including 374 adult psychiatric in-patients with schizophrenia or schizo-affective disorder was conducted. Psychotropic regimen, clinical outcomes, and quality of life were assessed before discharge and after 6, 12, 18, and 24 months. Costs and outcomes of psychotropic polypharmacy in comparison to antipsychotic monotherapy were analysed by means of mixed-effects regression models adjusted for propensity scores. Net-benefit…