Results 301 to 310 of about 6,113,842 (346)

Monitoring Spatial Coverage of Trending Topics in Twitter

Proceedings of the 28th International Conference on Scientific and Statistical Database Management, 2016
Most messages posted in Twitter usually discuss an ongoing event, triggering a series of tweets that together may constitute a trending topic (e.g., #election2012, #jesuischarlie, #oscars2016). Sometimes, such a topic may be trending only locally, assuming that related posts have a geographical reference, either directly geotagging them with exact ...
Kostas Patroumpas, Manolis Loukadakis
openaire   +1 more source

Spatial-temporal trends of rainfall erosivity and its implication for sustainable agriculture in the Wei River Basin of China

, 2020
Water and soil are important natural resources for agricultural development. Soil erosion is a worldwide problem threatening sustainable agriculture development. Rainfall is one of the major natural factors that cause soil erosion.
Yan Zhang, Yang Chao, Ruirui Fan, Feier Ren, Bingyu Qi, Kaixi Ji, Bin Xu   +6 more
semanticscholar   +1 more source

Spatial, Generational and Gendered Trends and Trend-Breaks in Mobility

2013
Long-term trends and potential trend conversions in mobility are addressed, with special focus on the Swedish population. Consistent with observations of “peak travel” reported from other countries, we find that growth in everyday travel has recently stagnated and declined. Trends differ significantly between demographic groups.
Lotta Frändberg, Bertil Vilhelmson
openaire   +1 more source

Trends in spatial disorientation research.

Aviation, space, and environmental medicine, 2002
Trends in spatial disorientation (SD) research over the past six decades were assessed by means of a literature review using four databases and three SD-related search terms. 347 SD-related papers were identified, 37% of which were in three categories: attitude displays, SD training, and SD incidence.
F H, Previc, W R, Ercoline
openaire   +1 more source

Spatial sampling in the presence of a trend

Journal of Statistical Planning and Inference, 1981
Abstract The spatial sampling designs suggested by Quenouille (1949) are investigated under a number of trend assumptions, namely a linear trend, linear trend and periodic variation, and spatially correlated populations. The results obtained provide a planar analogue to the one-dimensional results appearing in Cochram (1977, Ch. e). Centrally located
openaire   +1 more source

Spatial Mapping of Ozone and SO2 Trends in Europe

Science of The Total Environment, 2010
This article investigates the spatial mapping of temporal trends in air quality for all of Europe. Such spatially distributed maps provide information for policy making and for understanding the spatial character of air quality trends. Previous trend studies have concentrated on individual, or groups of, monitoring sites looking at the trends of these.
Denby B., Sundvor I., Cassiani M., de Smet P., de Leeuw F., Horalek J.   +5 more
openaire   +2 more sources

Is urban spatial development on the right track? Comparing strategies and trends in the European Union

Landscape and Urban Planning, 2019
Urban spatial development is a crucial issue for spatial planning and urban governance, ultimately determining cities’ sustainability. While a set of spatial strategies to address urban development are progressively gaining international consensus, their
C. Cortinovis, D. Haase, B. Zanon, D. Geneletti   +3 more
semanticscholar   +1 more source

Spatial trends in the sighting dates of British butterflies

International Journal of Biometeorology, 2003
A strong relationship between appearance dates and temperature has been demonstrated over two decades for most British butterflies. Given this relationship over time, this paper tests whether comparable spatial trends in timing are also apparent. A major survey of British butterflies is used to calculate mean sighting dates of adults across the country,
D B, Roy, J, Asher
openaire   +2 more sources

A Spatial Perspective on Global Energy Productivity Trends

2011
This innovative book explores the adoption of energy-saving technologies and their impact on energy efficiency improvements. It contains a mix of theoretical and empirical contributions, and combines and compares economic and physical indicators to monitor and analyse trends in energy efficiency.
Mulder, P., Florax, R.J.G.M., de Groot, H.L.F.   +2 more
openaire   +2 more sources

Spatial trends of Potamogetonaceae along an altitudinal gradient

Biologia, 2020
Nursel Ikinci, Necati Bayındır
semanticscholar   +1 more source