Search results

Filter

Filetype

Your search for "*" yielded 533629 hits

Crop Water Productivity Mapping and Benchmarking Using Remote Sensing and Google Earth Engine Cloud Computing

Scarce water resources present a major hindrance to ensuring food security. Crop water productivity (WP), embraced as one of the Sustainable Development Goals (SDGs), is playing an integral role in the performance-based evaluation of agricultural systems and securing sustainable food production. This study aims at developing a cloud-based model within the Google Earth Engine (GEE) based on Landsat

Estimating the Legacy Effect of Post-Cutting Shelterbelt on Crop Yield Using Google Earth and Sentinel-2 Data

Shelterbelts (or windbreaks) can effectively improve the microclimate and soil conditions of adjacent farmland and thus increase crop yield. However, the individual contribution of these two factors to yield changes is still unclear since the short-term effect from the microclimate and the accumulated effect from the soil jointly affect crop yield. The latter (soil effect) is supposed to remain af

Association of PET index quantifying skeletal uptake in NaF PET/CT images with overall survival in prostate cancer patients

Background: Bone Scan Index (BSI) derived from 2D whole-body bone scans is considered an imaging biomarker of bone metastases burden carrying prognostic information. Sodium fluoride (NaF) PET/CT is more sensitive than bone scan in detecting bone changes due to metastases. We aimed to develop a semi-quantitative PET index similar to the BSI for NaF PET/CT imaging and to study its relationship to BS

Cultural conformity and persistence in Dickcissel song are higher in locations in which males show high site fidelity

Dickcissel (Spiza americana) males occupying territories in cropland sites produced songs that were less similar on average to other Dickcissel songs in their neighborhood than did Dickcissels living in grasslands, where conformity to the local vocal culture was higher. Further, Dickcissel vocal culture changed more quickly over time in cropland sites relative to grassland sites. These differences

The Islamic Juridical Vacuum and Islamic Authorities' Role in Divorce Cases

This article argues that Islamic authorities do not try to sustain a jurisdiction over Islamic divorce in Denmark. They respond to a juridical demand caused by the absence of Islamic legal institutions in Denmark, which I call the Islamic juridical vacuum. This vacuum entails that sharia is often defined locally in communities or families rather than by Islamic authorities, and when women are unab

Introduction to Biostatistics

Knowledge in statistics is essential to draw solid conclusions from data. This chapter covers the basic concepts needed to navigate in the world of biostatistics, with the aim that the reader should know what to search for when encountering new situations. First, the chapter introduces basic concepts such as scales of measurement, relation between sample and population, and features of stochastic

Search for events with a pair of displaced vertices from long-lived neutral particles decaying into hadronic jets in the ATLAS muon spectrometer in pp collisions at s =13 TeV

A search for events with two displaced vertices from long-lived particle (LLP) pairs using data collected by the ATLAS detector at the LHC is presented. This analysis uses 139 fb-1 of proton-proton collision data at s=13 TeV recorded in 2015-2018. The search employs techniques for reconstructing vertices of LLPs decaying to jets in the muon spectrometer displaced between 3 and 14 m with respect to

A five-year follow-up of ABCA4 carriers showing deterioration of retinal function and increased structural changes

Purpose: To investigate whether the reduced retinal function and morphological retinal changes previously demonstrated in ABCA4 carriers had remained stationary or had deteriorated over time at 5-year follow-up to further explore if carriers of an autosomal recessive trait also express a weak phenotype, although this is not expected for an autosomal recessive disorder. Methods: Thirteen ABCA4 carr

Confounding factors of Alzheimer's disease plasma biomarkers and their impact on clinical performance

Introduction: Plasma biomarkers will likely revolutionize the diagnostic work-up of Alzheimer's disease (AD) globally. Before widespread use, we need to determine if confounding factors affect the levels of these biomarkers, and their clinical utility. Methods: Participants with plasma and CSF biomarkers, creatinine, body mass index (BMI), and medical history data were included (BioFINDER-1: n = 7

Production Strategies of Vocal Attitudes

Humans have an impressive ability to communicate precise social intentions and desires with their voice - through vocal attitudes. Previous studies have shown how isolated acoustic features such as pitch can convey social attitudes, but have mostly worked with single attitudes and have not controlled for inter-speaker variability. Thus, the vocal behaviours used to produce social attitudes remain

Measurements of jet observables sensitive to b -quark fragmentation in t t ¯ events at the LHC with the ATLAS detector

Several observables sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb-1 of s=13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Jets containing b hadrons are obtained from a sample of dileptonic tt¯ events, and the associated set of charged-particle tracks is separated into those from the primary pp interaction vertex and those from t

Fluorescence-free quantitative measurements of nitric oxide and major species in an ammonia/air flame with Raman spectroscopy

Raman spectroscopy is a powerful technique that allows for simultaneous measurements of multiple species; however, it suffers from low signal intensity and, in diagnostics of ammonia (NH3) combustion, strong flame fluorescence. The current work re-introduces a multipass setup to perform enhanced quantitative Raman spectroscopy measurements of major species and nitric oxide (NO) in a premixed lamin

Airbnb and the sharing economy

A large share of growth in the sharing or platform economy is driven by peer-to-peer (P2P) accommodation providers such as Airbnb. The literature argues for both positive and negative socio-cultural, economic and environmental impacts emanating from the tourism and hospitality businesses and value chains that are dependent on AirBnB and other online platforms. These impacts are felt in terms of co

Cloaking Synthesis Based on Exact Re-analysis

A novel synthesizing procedure is introduced and employed to extract locally-optimal cloaking devices. Their performance is compared with fundamental bounds found using a convex optimization approach. The optimization method is based on a method-of-moments paradigm utilizing rank-1 updates of the structure iteratively performed based on a greedy algorithm. This approach produces locally optimal sh

Styrmedel för minskad antibiotikaanvändning

Antibiotikaresistens innebär att bakterier blir motståndskraftiga mot antibiotika. Det är ett växande globalt problem eftersom möjligheten att behandla och bota infektioner minskar i takt med att antibiotikaresistensen ökar. En av orsakerna till resistensproblematiken är felaktig användning av antibiotika vid djuruppfödning. Exempelvis ges antibiotika inte endast vid behov utan i tillväxtbefrämjan

The state does not live by warfare alone : War and revenue in the long nineteenth century

Previous research shows that wars contributed to the expansion of state revenues in the Early Modern period and in the twentieth century. There are, however, few cross-national studies on the long nineteenth century. Using new unbalanced panel data on wars and public revenues from 1816 to 1913 for 27 American and European countries, this article provides new evidence that military conflicts very r