Search results for " observation."
showing 10 items of 434 documents
Estimating crop primary productivity with Sentinel-2 and Landsat 8 using machine learning methods trained with radiative transfer simulations
2019
Abstract Satellite remote sensing has been widely used in the last decades for agricultural applications, both for assessing vegetation condition and for subsequent yield prediction. Existing remote sensing-based methods to estimate gross primary productivity (GPP), which is an important variable to indicate crop photosynthetic function and stress, typically rely on empirical or semi-empirical approaches, which tend to over-simplify photosynthetic mechanisms. In this work, we take advantage of all parallel developments in mechanistic photosynthesis modeling and satellite data availability for an advanced monitoring of crop productivity. In particular, we combine process-based modeling with …
Advances in detection of fastidious bacteria: From microscopic observation to molecular biosensors
2019
Abstract Identification of pathogens and diagnosis of infections are important health challenges, especially in the case of fastidious bacteria which are those difficult-to-grow. A fastidious organism is any organism that has a complex nutritional requirement. Additionally, a fastidious microorganism will only grow when specific nutrients are included in the culture medium. These bacteria can cause serious diseases whose detection and monitoring is critical in many cases. The oldest detection methods are based on simple microscopy observation and staining, after culture on selective growth media, but often do not provide a clear answer. Some new molecular approaches, such as DNA-based seque…
Observation of Photon Polarization in theb→sγTransition
2014
This Letter presents a study of the flavor-changing neutral current radiative $B^{\pm} \to K^{\pm}\pi^{\mp}\pi^{\pm}\gamma$ decays performed using data collected in proton-proton collisions with the LHCb detector at $7$ and $8\,$TeV center-of-mass energies. In this sample, corresponding to an integrated luminosity of $3\,\text{fb}^{-1}$, nearly $14\,000$ signal events are reconstructed and selected, containing all possible intermediate resonances with a $K^{\pm}\pi^{\mp}\pi^{\pm}$ final state in the $[1.1, 1.9]\,$GeV/$c^{2}$ mass range. The distribution of the angle of the photon direction with respect to the plane defined by the final-state hadrons in their rest frame is studied in interva…
Venture capitalists' decision-making in small equity markets: a case study using participant observation
2004
Despite significant academic research undertaken in the field of venture capital decision-making process, the dimension and maturity of equity market has not yet been considered as an important contextual factor. Aiming at developing an understanding on how venture capitalists (VCs) select early-stage projects in small equity markets, a pilot study using participant observation technique has been conducted in a Portuguese venture capital firm. The findings indicate that the decision-making process and the criteria used by VCs in this market context differ significantly from those used in the developed equity markets. Regarding the decision-making process as a whole, it appears to be more in…
Episodic memories: how do the hippocampus and the entorhinal ring attractors cooperate to create them?
2020
AbstractThe brain is capable of registering a constellation of events, encountered only once, as an episodic memory that can last for a lifetime. As evidenced by the clinical case of the patient HM, memories preserving their episodic nature still depend on the hippocampal formation, several years after being created, while semantic memories are thought to reside in neocortical areas. The neurobiological substrate of one-time learning and life-long storing in the brain, that must exist at the cellular and circuit level, is still undiscovered. The breakthrough is delayed by the fact that studies jointly investigating the rodent hippocampus and entorhinal cortex are mostly targeted at understa…
Parasitic microfungi on land plants in France : a commented list of presumably unpublished taxa.
2019
As part of an inventory of more than 800 parasitic Microfungi on land plants from the centre of France, 47 taxa reveal having no satisfactory correspondence with already described species in the usual textbooks devoted to this subject. As such, these seemingly yet unpublished taxa may constitute material of interest, for which critically commented descriptions are provided.
Deception and Abuse: Manifold Instances of Proximity Violence Against Sub-Saharan Women
2020
This chapter, by referring to the gender-violence binomial, highlights some of the dynamics between “resistant victims” and “proximate perpetrators” which characterize proximity violence. It presents the results of research consisting in participant observation of 18 sub-Saharan women residing in refugee facilities located in western Sicily and 16 non-directive interviews, from which three cases have been extracted.
New geo-portal for MODIS/SEVIRI image products with geolocation-based retrieval functionality
2015
A large number of remote sensing data sets have been collected in recent years by Earth observation instruments such as the moderate resolution imaging spectroradiometer (MODIS) aboard the Terra/Aqua satellite and the spinning enhanced visible and infrared imager (SEVIRI) aboard the geostationary platform Meteosat Second Generation. The advanced remote sensing products resulting from the analysis of these data are useful in a wide variety of appli- cations but require significant resources in terms of storage, retrieval, and analysis. Despite the wide availability of these MODIS/SEVIRI products, the data coming from these instruments are spread among different locations and retrieved from d…
Love, joy and necessity - A phenomenological study of food and meals in adolescents and young adults with cancer receiving high-emetogenic chemothera…
2021
Abstract Purpose This study explored how the phenomenon of meals appeared in the interrelationship between adolescents and young adults (AYAs) receiving high-emetogenic chemotherapy, their next of kin and health professionals in the clinical setting. Method Data were collected by 140 h of participant observation conducted to gain insights into the nature of how meals appeared in the interrelationship between 12 AYAs (age 15–29 years), their next-of-kin and health professionals. The AYAs were patients with oncological and haematological diseases recruited from three university hospital departments. Data analysis was guided by van Manen's hermeneutic-phenomenological approach. Results The ess…
Sarcopenia and health-related outcomes: an umbrella review of observational studies
2019
Key summary pointsAimTo investigate associations of sarcopenia with adverse health-related outcomes, through an umbrella review method.FindingsSarcopenia appears to be significantly associated with several adverse outcomes in older people, with a strong evidence for increased risk of mortality, disability, and falls.MessageSarcopenia is associated with several adverse health-related outcomes in older people, indicating the need of assessing this condition in daily practice. AbstractBackgroundThe clinical relevance of sarcopenia has increasingly been recognized. However, whether it is associated with the development of other medical conditions is still unclear. Therefore, we aimed to capture…