Results 21 to 30 of about 1,688,232 (308)

The yield gap of global grain production: A spatial analysis [PDF]

open access: yes, 2010
Global grain production has increased dramatically during the past 50 years, mainly as a consequence of intensified land management and introduction of new technologies.
Stehfest, E.   +4 more
core   +1 more source

Scaling and allometry in the building geometries of Greater London [PDF]

open access: yes, 2008
Many aggregate distributions of urban activities such as city sizes reveal scaling but hardly any work exists on the properties of spatial distributions within individual cities, notwithstanding considerable knowledge about their fractal structure.
D. Smith   +11 more
core   +1 more source

Using mobility data as proxy for measuring urban vitality

open access: yesJournal of Spatial Information Science, 2018
In this paper, we propose a computational approach to Jane Jacobs' concept of diversity and vitality, analyzing new forms of spatial data to obtain quantitative measurements of urban qualities frequently employed to evaluate places.
Patrizia Sulis   +3 more
doaj   +1 more source

Ethical, moral and social dimensions in farm production practices: a segmentation study to assess Irish consumers’ perceptions of meat quality

open access: yesIrish Journal of Agricultural and Food Research, 2018
Growing consumer concerns with modern farming and food production systems indicate a significant market opportunity for meat production practices that consider ethical, moral and social value traits.
Regan Á., Henchion M, McIntyre B
doaj   +1 more source

Integrating the UAS in Undergraduate Teaching and Research – Opportunities and Challenges at University of North Georgia [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
The University of North Georgia (UNG) has begun to evaluate both fixed and rotary UAS platforms across the departments to evaluate their potential for furthering both student learning experiences and undergraduate research.
J. B. Sharma, D. Hulsey
doaj   +1 more source

Modelling urban networks using Variational Autoencoders

open access: yesApplied Network Science, 2019
A long-standing question for urban and regional planners pertains to the ability to describe urban patterns quantitatively. Cities’ transport infrastructure, particularly street networks, provides an invaluable source of information about the urban ...
Kira Kempinska, Roberto Murcio
doaj   +1 more source

Spatial Interactions and resilience in arid ecosystems [PDF]

open access: yes, 2004
We present a mathematical analysis of the consequences of spatial interactions between vegetation patches by means of water flow for the functioning of arid systems.
Van de Koppel, J.   +5 more
core   +1 more source

AN AGENT-BASED MODEL TO REPRESENT SPACE-TIME PROPAGATION OF FOREST-FIRE SMOKE [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Agent-based modeling approaches have been used for various case studies related to the geospatial dynamics of complex systems. The proliferation of forest-fire smoke and the associated airborne particulate matter that behaves as complex systems make it ...
A. K. Smith, S. Dragicevic
doaj   +1 more source

An Empirical Study Of Productivity Growth In EU28 - Spatial Panel Analysis [PDF]

open access: yes, 2014
This paper investigates the spatial process of productivity growth in the European Union on the foundations of the theory of New Economic Geography. The proposed model is based on the study of NUTS 2 regions and takes into consideration a spatial weights
Olejnik, Alicja, Alicja Olejnik
core   +1 more source

Anonymised human location data in England for urban mobility research

open access: yesScientific Data
The rapid expansion of sensor technologies and location-enabled mobile applications has greatly advanced the study of human mobility. Recently emerged sources like mobile app data offer outputs similar to traditional datasets—trip chains, flows, and ...
Chen Zhong   +4 more
doaj   +1 more source

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