591 research outputs found
The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
No full textThe work of Bernard Stiegler (1952–2020) provides invaluable material for rethinking the built environment as a sort of inorganic spatial memory that enables the evolution of life by means other than organic life. Following Stiegler’s theoretical turn toward epiphylogenetic processes, Footprint 30 is devoted to revisiting the built environment as middling between individuating technical ensembles and niche construction processes. It offers a platform to the transdisciplinary field of posthuman scholarship dealing with existential niches from a technological angle and the concomitant architectural thought that advances such speculative recasting.ISBN: 978-94-92852-40-3Situated ArchitectureTheory, Territories & Transition
[Rezension zu:] Bernd Stiegler: Theoriegeschichte der Photographie
No full textRezension zu Bernd Stiegler: Theoriegeschichte der Photographie. München (Wilhelm Fink) 2006 (= Bild und Text. Hg. v. Gottfried Boehm, Gabriele Brandstetter u. Karlheinz Stierle). 472 S
Characteristics of summer-time energy exchange in a high Arctic tundra heath 2000–2010
No full textGlobal warming will bring about changes in surface energy balance of Arctic ecosystems, which will have implications for ecosystem structure and functioning, as well as for climate system feedback mechanisms. In this study, we present a unique, long-term (2000–2010) record of summer-time energy balance components (net radiation, R n; sensible heat flux, H; latent heat flux, LE; and soil heat flux, G) from a high Arctic tundra heath in Zackenberg, Northeast Greenland. This area has been subjected to strong summer-time warming with increasing active layer depths (ALD) during the last decades. We observe high energy partitioning into H, low partitioning into LE and high Bowen ratio (β=H/LE) compared with other Arctic sites, associated with local climatic conditions dominated by onshore winds, slender vegetation with low transpiration activity and relatively dry soils. Surface saturation vapour pressure deficit (D s) was found to be an important variable controlling within-year surface energy partitioning. Throughout the study period, we observe increasing H/R n and LE/R n and decreasing G/R n and β, related to increasing ALD and decreasing soil wetness. Thus, changes in summer-time surface energy balance partitioning in Arctic ecosystems may be of importance for the climate system
The Legend of Saint Alan: Larnaudie and Stiegler in the Oversight Committee Room
No full textInternational audienceTen years on from the 2008 global financial crisis, this article sets in dialogue two French treatments – by the novelist Mathieu Larnaudie and the philosopher Bernard Stiegler – of footage of the 2008 testimony of Alan Greenspan, former chairman of the US Federal Reserve, before the United States House of Representatives Committee on Oversight and Government Reform. The article introduces and compares the concepts of ‘effondrement’ and ‘prolétarisation’ developed by the two writers in relation to the Greenspan hearing, and analyses how both understand the question of ideology as it emerges in the hearing. Informed by interviews conducted by the author with Larnaudie and Stiegler, the piece concludes by discussing the notion common to both writers that Greenspan is a ‘saint’ of the crisis
« Démocratie sanitaire : l’échec ? » (entretien avec Patrice Maniglier, Jean-Claude Monod et Barbara Stiegler)
No full textSpatiotemporal variability in surface energy balance across tundra, snow and ice in Greenland
No full textThe surface energy balance (SEB) is essential for understanding the coupled cryosphere–atmosphere system in the Arctic. In this study, we investigate the spatiotemporal variability in SEB across tundra, snow and ice. During the snow-free period, the main energy sink for ice sites is surface melt. For tundra, energy is used for sensible and latent heat flux and soil heat flux leading to permafrost thaw. Longer snow-free period increases melting of the Greenland Ice Sheet and glaciers and may promote tundra permafrost thaw. During winter, clouds have a warming effect across surface types whereas during summer clouds have a cooling effect over tundra and a warming effect over ice, reflecting the spatial variation in albedo. The complex interactions between factors affecting SEB across surface types remain a challenge for understanding current and future conditions. Extended monitoring activities coupled with modelling efforts are essential for assessing the impact of warming in the Arctic.</p
From Epiphylogenesis to General Organology: Introduction to “The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler”, Footprint 30
No full textThe work of Bernard Stiegler (1952–2020) provides invaluable material for rethinking the built environment as a sort of inorganic spatial memory that enables the evolution of life by means other than organic life. Following Stiegler’s theoretical turn toward epiphylogenetic processes, Footprint 30 is devoted to revisiting the built environment as middling between individuating technical ensembles and niche construction processes. It offers a platform to the transdisciplinary field of posthuman scholarship dealing with existential niches from a technological angle and the concomitant architectural thought that advances such speculative recasting.Situated ArchitectureTheory, Territories & Transition
Vulnerability of Primary Productivity and Its Carbon Use Efficiency to Unfavorable Climatic Conditions in Jambi Province, Indonesia
No full textClimatic conditions and land cover play crucial roles in influencing the process of carbon uptake through vegetation. This study aimed to analyze the effect of climate variability on carbon uptake of four different land covers in Jambi Province, Indonesia. The four land cover types studied were: forest, shrub, grass, and irrigated soybean, based on Community Land Model version 5. Forest was found to have the highest net primary production (NPP) compared to the other land covers. Seasonal climate variability showed no major effect on NPP and gross primary production (GPP). However, GPP and NPP experienced significant declines during El Niño Southern Oscillation (ENSO), particularly in 2015. Carbon use efficiency (CUE = NPP/GPP) was also affected by ENSO, where CUE decreased during El Niño, particularly in October and November with an increased number of days without rainfall. In addition, the difference between latent (LE) and sensible heat (H) flux, denoted as (LE-H), decreased from August to November. This difference was highly correlated with NPP. This result indicates that when water supply is low, stomata will close, thereby reducing photosynthesis and transpiration, and allocating more of the available energy to sensible heat flux rather than latent heat flux
The influence of surface roughness and turbulence on heat fluxes from an oil palm plantation in Jambi, Indonesia
No full textOil palm plantations are expanding vastly in Jambi, resulted in altered surface roughness and turbulence characteristics, which may influence exchange of heat and mass. Micrometeorological measurements above oil palm canopy were conducted for the period 2013–2015. The oil palms were 12.5 years old, canopy height 13 meters and 1.5 years old canopy height 2.5 m. We analyzed the influence of surface roughness and turbulence strenght on heat (sensible and latent) fluxes by investigating the profiles and gradient of wind speed, and temperature, surface roughness (roughness length, zo, and zero plane displacement, d), and friction velocity u . Fluxes of heat were calculated using profile similarity methods taking into account atmospheric stability calculated using Richardson number Ri and the generalized stability factor ζ. We found that roughness parameters (zo, d, and u ) directly affect turbulence in oil palm canopy and hence heat fluxes; they are affected by canopy height, wind speed and atmospheric stability. There is a negative trend of d towards air temperature above the oil palm canopy, indicating the effect of plant volume and height in lowering air temperature. We propose studying the relation between zero plane displacement d with a remote sensing vegetation index for scaling up this point based analysis
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