Stakeholder participation in agricultural research projects: a conceptual framework for reflection and decision-making     

Andreas?NeefEmail author  Dieter?Neubert 《Agriculture and Human Values》2011,28(2):179-194

Recent discourse in the field of participatory agricultural research has focused on how to blend various forms and intensities of stakeholder participation with quality agricultural science, moving beyond the simple “farmer-first” ideology of the 1980s and early 1990s. Yet, most existing frameworks of participation in agricultural research still adhere to a linear typology of participatory research with an inherent claim of “the more participation, the better.” In this article, we propose a new framework that looks at participatory research elements along different dimensions and attributes and thus takes into account the diversity and dynamics of agricultural research projects. The framework provides a basis for agricultural researchers engaged in participatory processes with local stakeholders to decide for which issues and in which phases certain participatory elements could be used in a specific research context. Rather than aiming at maximizing the adoption of participatory methods, it can thus become a tool for optimizing the use of participatory approaches in agricultural research. We conclude that this framework can be a starting point for a more thoughtful integration of participatory elements in agricultural research projects that does justice to the multidimensional and dynamic nature of stakeholder participation in varying contexts.  相似文献   

Detection of near-atmospheric concentrations of CO2 by an olfactory subsystem in the mouse     

Hu J  Zhong C  Ding C  Chi Q  Walz A  Mombaerts P  Matsunami H  Luo M 《Science (New York, N.Y.)》2007,317(5840):953-957

Carbon dioxide (CO2) is an important environmental cue for many organisms but is odorless to humans. It remains unclear whether the mammalian olfactory system can detect CO2 at concentrations around the average atmospheric level (0.038%). We demonstrated the expression of carbonic anhydrase type II (CAII), an enzyme that catabolizes CO2, in a subset of mouse olfactory neurons that express guanylyl cyclase D (GC-D+ neurons) and project axons to necklace glomeruli in the olfactory bulb. Exposure to CO2 activated these GC-D+ neurons, and exposure of a mouse to CO2 activated bulbar neurons associated with necklace glomeruli. Behavioral tests revealed CO2 detection thresholds of approximately 0.066%, and this sensitive CO2 detection required CAII activity. We conclude that mice detect CO2 at near-atmospheric concentrations through the olfactory subsystem of GC-D+ neurons.  相似文献   

Astronomy. Seeing the surfaces of stars     

Quirrenbach A 《Science (New York, N.Y.)》2007,317(5836):325-326

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Psychology. Trust me on this     

Meyer-Lindenberg A 《Science (New York, N.Y.)》2008,321(5890):778-780

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Rise of the Andes     

Garzione CN  Hoke GD  Libarkin JC  Withers S  MacFadden B  Eiler J  Ghosh P  Mulch A 《Science (New York, N.Y.)》2008,320(5881):1304-1307

The surface uplift of mountain belts is generally assumed to reflect progressive shortening and crustal thickening, leading to their gradual rise. Recent studies of the Andes indicate that their elevation remained relatively stable for long periods (tens of millions of years), separated by rapid (1 to 4 million years) changes of 1.5 kilometers or more. Periodic punctuated surface uplift of mountain belts probably reflects the rapid removal of unstable, dense lower lithosphere after long-term thickening of the crust and lithospheric mantle.  相似文献   

Ice flow direction change in interior West Antarctica     

Siegert MJ  Welch B  Morse D  Vieli A  Blankenship DD  Joughin I  King EC  Vieli GJ  Payne AJ  Jacobel R 《Science (New York, N.Y.)》2004,305(5692):1948-1951

Upstream of Byrd Station (West Antarctica), ice-penetrating radar data reveal a distinctive fold structure within the ice, in which isochronous layers are unusually deep. The fold has an axis more than 50 kilometers long, which is aligned up to 45 degrees to the ice flow direction. Although explanations for the fold's formation under the present flow are problematic, it can be explained if flow was parallel to the fold axis approximately 1500 years ago. This flow change may be associated with ice stream alterations nearer the margin. If this is true, central West Antarctica may respond to future alterations more than previously thought.  相似文献   

No evidence of murine-like gammaretroviruses in CFS patients previously identified as XMRV-infected     

Knox K  Carrigan D  Simmons G  Teque F  Zhou Y  Hackett J  Qiu X  Luk KC  Schochetman G  Knox A  Kogelnik AM  Levy JA 《Science (New York, N.Y.)》2011,333(6038):94-97

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Large magnetic anisotropy of a single atomic spin embedded in a surface molecular network     

Hirjibehedin CF  Lin CY  Otte AF  Ternes M  Lutz CP  Jones BA  Heinrich AJ 《Science (New York, N.Y.)》2007,317(5842):1199-1203

Magnetic anisotropy allows magnets to maintain their direction of magnetization over time. Using a scanning tunneling microscope to observe spin excitations, we determined the orientation and strength of the anisotropies of individual iron and manganese atoms on a thin layer of copper nitride. The relative intensities of the inelastic tunneling processes are consistent with dipolar interactions, as seen for inelastic neutron scattering. First-principles calculations indicate that the magnetic atoms become incorporated into a polar covalent surface molecular network in the copper nitride. These structures, which provide atom-by-atom accessibility via local probes, have the potential for engineering anisotropies large enough to produce stable magnetization at low temperatures for a single atomic spin.  相似文献   

Quantum spin hall insulator state in HgTe quantum wells   总被引：1，自引：0，他引：1  

König M  Wiedmann S  Brüne C  Roth A  Buhmann H  Molenkamp LW  Qi XL  Zhang SC 《Science (New York, N.Y.)》2007,318(5851):766-770

Recent theory predicted that the quantum spin Hall effect, a fundamentally new quantum state of matter that exists at zero external magnetic field, may be realized in HgTe/(Hg,Cd)Te quantum wells. We fabricated such sample structures with low density and high mobility in which we could tune, through an external gate voltage, the carrier conduction from n-type to p-type, passing through an insulating regime. For thin quantum wells with well width d < 6.3 nanometers, the insulating regime showed the conventional behavior of vanishingly small conductance at low temperature. However, for thicker quantum wells (d > 6.3 nanometers), the nominally insulating regime showed a plateau of residual conductance close to 2e(2)/h, where e is the electron charge and h is Planck's constant. The residual conductance was independent of the sample width, indicating that it is caused by edge states. Furthermore, the residual conductance was destroyed by a small external magnetic field. The quantum phase transition at the critical thickness, d = 6.3 nanometers, was also independently determined from the magnetic field-induced insulator-to-metal transition. These observations provide experimental evidence of the quantum spin Hall effect.  相似文献   

The ecoresponsive genome of Daphnia pulex     

Colbourne JK  Pfrender ME  Gilbert D  Thomas WK  Tucker A  Oakley TH  Tokishita S  Aerts A  Arnold GJ  Basu MK  Bauer DJ  Cáceres CE  Carmel L  Casola C  Choi JH  Detter JC  Dong Q  Dusheyko S  Eads BD  Fröhlich T  Geiler-Samerotte KA  Gerlach D  Hatcher P  Jogdeo S  Krijgsveld J  Kriventseva EV  Kültz D  Laforsch C  Lindquist E  Lopez J  Manak JR  Muller J  Pangilinan J  Patwardhan RP  Pitluck S  Pritham EJ  Rechtsteiner A  Rho M  Rogozin IB  Sakarya O  Salamov A  Schaack S  Shapiro H  Shiga Y  Skalitzky C  Smith Z  Souvorov A  Sung W 《Science (New York, N.Y.)》2011,331(6017):555-561

We describe the draft genome of the microcrustacean Daphnia pulex, which is only 200 megabases and contains at least 30,907 genes. The high gene count is a consequence of an elevated rate of gene duplication resulting in tandem gene clusters. More than a third of Daphnia's genes have no detectable homologs in any other available proteome, and the most amplified gene families are specific to the Daphnia lineage. The coexpansion of gene families interacting within metabolic pathways suggests that the maintenance of duplicated genes is not random, and the analysis of gene expression under different environmental conditions reveals that numerous paralogs acquire divergent expression patterns soon after duplication. Daphnia-specific genes, including many additional loci within sequenced regions that are otherwise devoid of annotations, are the most responsive genes to ecological challenges.  相似文献