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Résultats de la recherche (102 résultats)

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Fieldwork unbound : spaces of association in postconflict Vietnam
  • This article traces the ways in which the field emerges and becomes emplaced among three groups of people by presenting an inclusive reading of fieldwork in postconflict Vietnam. It employs a heuristic device called spaces of association
  • to illustrate the different yet interrelated socio-spatial fields that surface when conducting fieldwork in an environment known for violence. In shedding light on the field's ability to extend beyond the territorially defined “field site,” this article speaks
  • to debates surrounding the socio-spatial production of multiple and overlapping fields, describes the audiences engaged with and implicated in research, and contributes to understandings of ethical research engagement with postconflict field sites.
  • 2014
The local construction of social enterprise markets : an evaluation of Jens Beckert’s field approach
  • The local construction of social enterprise markets : an evaluation of Jens Beckert’s field approach
  • This article examines the local construction of social enterprise markets through an evaluation of Jens Beckert’s field approach. To do so, it describes the reciprocal interactions between forces of institutions, networks, and cognitive frameworks
  • ’ and allows us to unpack some of the hybrid character of SE markets. However, because of the way in the field perspective has been designed to explain agency in orthodox capitalist markets, it struggles to incorporate the motivations that drive agency
  • 2014
Invasive crayfish as drivers of fine sediment dynamics in rivers : field and laboratory evidence
  • Invasive crayfish as drivers of fine sediment dynamics in rivers : field and laboratory evidence
  • This study explores the impacts of invasive signal crayfish on suspended sediment dynamics at the patch scale through laboratory and field study. Three hypotheses are presented and tested : 1) that signal crayfish generate pulses of fine sediment
  • mobilisation through burrowing and movement that are detectable in the flow field; 2) that such pulses may be more frequent during nocturnal periods when signal crayfish are known to be most active; and 3) that cumulatively the pulses would be sufficient
  • to drive an overall increase in turbidity. Laboratory mesocosm experiments were used to explore crayfish impacts on suspended sediment concentrations for 2 treatments : clay banks and clay bed substrate. For the field study, high frequency near-bed and mid
  • 2014
Plants as river system engineers
  • This paper reviews research that dates back to the 1950s on the geomorphological influence of vegetation within fluvial systems. During the late twentieth century this research was largely pursued through field observations, but during the early
  • years of the twenty-first century, complementary field, flume and theoretical/modelling investigations have contributed to major advances in understanding the influence of plants on fluvial systems. Flume experiments have demonstrated the fundamental
  • into morphodynamic models. Meanwhile, field investigations have revealed that vegetation has a far more important and complex influence on fluvial systems than previously realized.
  • 2014
The potential for mixed methods : results from the field in urban South Africa
  • The potential for mixed methods : results from the field in urban South Africa
  • the field suggest that the combination of intensive and extensive methods could produce unique insights only possible from a mixed method approach.
  • 2014
Tillage effects on certain physical and hydraulic properties of a loamy soil under a crop rotation in a semi-arid region with a cool climate
  • The aim of this study was to research the influence of 4 different tillage practices (T1 : Conventional tillage; T2 : Reduced tillage-I;; T3 : Reduced tillage-II and T4 : No-till) on bulk density, total porosity, penetration resistance, field
  • capacity, field water content and the infiltration rate of a loamy soil in a semi-arid region with a cool climate and an annual mean temperature of 5.6 °C. In particular, the effectiveness of the no-till practice was investigated. The AA. made assessments
  • higher field capacity, field water content and infiltration rate; Soil bulk density and penetration resistance were lower in conventional tillage; No-till practice increased winter wheat germination.
  • 2014
Effectiveness of sustainable land management measures in West Usambara highlands, Tanzania
  • The study was conducted in Lushoto District, north-eastern Tanzania. Sixty fields with five different sustainable land management (SLM) categories were studied. The bio-physical properties of the fields were determined, and measurements
  • the slope and reduce soil losses by water erosion significantly. The use of high amounts of farmyard manure on the terraces of SLM 1 and SLM 2 category fields resulted in a 3 to 4 times higher yield of maize compared to the control plots (SLM 5), while yield
  • of beans increased 6 to 7 times compared to the control plots. Despite the use of farmyard manure on better managed fields, no significant improvements of soil fertility were found. This is probably because the amounts applied are too small to allow build
  • 2014
A new expression describing the migration of aeolian dunes
  • Based on quantitative simulations on the formation and evolution of aeolian dune fields, a semi-analytical equation describing the migration of aeolian sand dunes with respect to dune height, annual wind regime, frictional wind speed, and sand grain
  • diameter is proposed in this paper through analyzing the migration speeds of aeolian sand dunes with different heights in a dune field. The migration speeds of aeolian sand dunes on Earth predicted by the equation is consistent with field observations
  • proposed by this paper can also be used to determine the annual wind regime and wind speed in dune fields for given dune speed and sand diameter.
  • 2014
Michel Foucault and the smart city: power dynamics inherent in contemporary governing through code
  • projects in Switzerland in the field of smart electricity management, aimed at (1) the assessment of customer needs and behaviours with regard to novel smart metering solutions (iSMART), and (2) the elaboration of novel IT solutions in the field of smart
  • 2014
Everyday expertise: land regularization and the conditions for land grabs in Petén, Guatemala
  • This paper examines the work of regularizing (titling) land in the context of a World-Bank-funded market-assisted land reform project in northern Guatemala. Specifically, the focus is on the meaning-making work of field technicians who seek
  • how technicians elaborate knowledge in the field and on the fly, this study reveals spheres of politics where regularization could be modestly contested or transformed. Such politics are worth attending to because in northern Guatemala and elsewhere
  • 2014
Political ecology and the geography of science : Lesosady, Lysenkoism, and Soviet Science in Kyrgyzstan's walnut–fruit forest
  • The A. present a historical geography of the Lysenkoist and field-based heredity science that in-formed a program of forest modification in Soviet Central Asia in the mid-twentieth century. This program, which used horticultural techniques
  • to construct forest-orchards (lesosady) in the walnut–fruit forests of Soviet Kirgizia, entered the landscape into scientific controversies, with ramifications for human–forest interactions in Kyrgyzstan today. Field sciences, like Lysenkoist heredity, have
  • 2014
Growing buildings in corn fields : urban expansion and the persistence of maize in the Toluca Metropolitan Area, Mexico
  • Growing buildings in corn fields : urban expansion and the persistence of maize in the Toluca Metropolitan Area, Mexico
  • 2014
Does poor neighbourhood reputation create a neighbourhood effect on employment ? The results of a field experiment in the UK
  • Does poor neighbourhood reputation create a neighbourhood effect on employment ? The results of a field experiment in the UK
  • 2014
Spatial variability in soil compaction properties associated with field traffic operations
  • Spatial variability in soil compaction properties associated with field traffic operations
  • This study was carried out, at the Ataturk University Research Farm in the Erzurum Plain, to determine the effects of field traffic operations on the changes in spatial variability of soil aggregate stability (AS), bulk density (BD), total porosity
  • 2014
Flume- and field-based evaluation of a time-integrated suspended sediment sampler for the analysis of sediment properties
  • Flume- and field-based evaluation of a time-integrated suspended sediment sampler for the analysis of sediment properties
  • This study evaluates the sampler under both flume and field conditions for efficiency in the mass and grain size of the suspended sediment collected. The sampler was tested in a flume using both kaolinite and sediment samples (sieved to < 180 μm
  • 2014
Negotiating multiple positionalities in the interview setting : researching across gender and generational boundaries
  • experiences, this research outlines the need for explicit critical attention by geographers to the influence of the fluid intersectional identities of the researcher and researched on research experiences in the field and research outcomes.
  • 2014
Stakeholder narratives on alcohol governance in the Western Cape : the socio-spatial nuisance of drink
  • upon the problem of drinking. As a result, the paper exposes the discrepancies between what is said (of alcohol by policy makers) and what is done (about alcohol within policy, as an original contribution to the multidisciplinary field of critical
  • 2014
Pattern of cumulative soil erosion and redistribution pinpointed through magnetic signature of Chernozem soils
  • The experimental test field is situated in NE Bulgaria, southward from the city of Russe. An agricultural land of 4.5 ha, utilized for crop production, has been mapped at 10 × 10 m grid interval by using magnetic methods. Field measurements
  • 2014
Three-dimensional modeling of coastal boulders using multi-view image measurements
  • equipment (digital cameras) that can be used in various coastal environments to easily acquire numerous images of the object of interest. Initial results can be rapidly assessed in the field for immediate quality control. Resulting 3D models, built from
  • techniques by examining 3D models of boulders observed at a coastal field site on Lu Dao Island in south-eastern Taiwan.
  • 2014
Integrating Archaeology and Landscape Analysis for the Cultural Heritage Management of a World War I Militarised Landscape: The German Field Defences in Antwerp
  • Integrating Archaeology and Landscape Analysis for the Cultural Heritage Management of a World War I Militarised Landscape: The German Field Defences in Antwerp
  • 2014