105 research outputs found

    Public participation in integrated water management : a wicked process for a complex societal problem

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    The meaning of both Integrated Water Management and Public Participation (PP) are subject to interpretation by stakeholders, because the concepts of uncertainty, risk management and construction of a societal project challenge scientific expertise, political power and democratic decisions concerning public good management. I do not study PP and IWM with a normative aspiration to identify the ‘true’ problem and participation, but to investigate constructions of reality of water management challenges (WMCs) and of participation from different perspectives: which type of participation is perceived as appropriate for which type of water management challenges? The study areas are river basins in Jordan, Lebanon, Syria and Turkey. The EU Water Framework Directive provides an analytical framework to study meanings of PP in River Basin Management Plan. Grounded Theory Methodology is used to elicit understandings of both PP and WMCs via qualitative and quantitative data (questionnaires, interviews, medium-scale survey). This thesis presents grounded typologies of objectives of PP, types of PP, of WMCs, of the roles of the competent authority and of hurdles to initiate PP. Even in countries where criteria characterising a democratic society are not all entirely satisfied there is a case for promoting PP in IWM. Although an uneducated public, with poor knowledge of the far reaching consequences of WMC is seen as a hurdle to initiate PP, the evidences show the contrary: a public aspiration, readiness and willingness to express ones’ voice. Conditions to foster PP require both political stability and an open society where opinions can be formed and exchanged; but also pressure on resources and services for the public to be interested and willing to take part in water management, and for the competent authority to be willing to engage with both stakeholders and the public in order to complement experts’ understandings of complex societal problems. Public Participation is not only about the pursuit of power over the final decision, but about defining what problems are about according to different constructs of reality. The newly developed grounded typologies of objectives of PP and of types for PP help identifying appropriate forms of participatory practices in relation to the contextual water management crisis.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

    Origin of the different electronic structure of Rh- and Ru-doped Sr2IrO4

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    One way to induce insulator to metal transitions in the spin-orbit Mott insulator Sr2IrO4 is to substitute iridium with transition metals (Ru, Rh). However, this creates intriguing inhomogeneous metallic states, which cannot be described by a simple doping effect. We detail the electronic structure of the Ru-doped case with angle-resolved photoemission and show that, contrary to Rh, it cannot be connected to the undoped case by a rigid shift. We further identify bands below EFE_F coexisting with the metallic ones that we assign to non-bonding Ir sites. We rationalize the differences between Rh and Ru by a different hybridization with oxygen, which mediates the coupling to Ir and sensitively affects the effective doping. We argue that the spin-orbit coupling does not control neither the charge transfer nor the transition threshold

    Microsatellite mapping of QTLs affecting resistance to coccidiosis (Eimeria tenella) in a Fayoumi × White Leghorn cross

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    <p>Abstract</p> <p>Background</p> <p>Avian coccidiosis is a major parasitic disease of poultry, causing severe economical loss to poultry production by affecting growth and feed efficiency of infected birds. Current control strategies using mainly drugs and more recently vaccination are showing drawbacks and alternative strategies are needed. Using genetic resistance that would limit the negative and very costly effects of the disease would be highly relevant. The purpose of this work was to detect for the first time QTL for disease resistance traits to <it>Eimeria tenella </it>in chicken by performing a genome scan in an F2 cross issued from a resistant Fayoumi line and a susceptible Leghorn line.</p> <p>Results</p> <p>The QTL analysis detected 21 chromosome-wide significant QTL for the different traits related to disease resistance (body weight growth, plasma coloration, hematocrit, rectal temperature and lesion) on 6 chromosomes. Out of these, a genome-wide very significant QTL for body weight growth was found on GGA1, five genome-wide significant QTL for body weight growth, plasma coloration and hematocrit and one for plasma coloration were found on GGA1 and GGA6, respectively. Two genome-wide suggestive QTL for plasma coloration and rectal temperature were found on GGA1 and GGA2, respectively. Other chromosme-wide significant QTL were identified on GGA2, GGA3, GGA6, GGA15 and GGA23. Parent-of-origin effects were found for QTL for body weight growth and plasma coloration on GGA1 and GGA3. Several QTL for different resistance phenotypes were identified as co-localized on the same location.</p> <p>Conclusion</p> <p>Using an F2 cross from resistant and susceptible chicken lines proved to be a successful strategy to identify QTL for different resistance traits to <it>Eimeria tenella</it>, opening the way for further gene identification and underlying mechanisms and hopefully possibilities for new breeding strategies for resistance to coccidiosis in the chicken. From the QTL regions identified, several candidate genes and relevant pathways linked to innate immune and inflammatory responses were suggested. These results will be combined with functional genomics approaches on the same lines to provide positional candidate genes for resistance loci for coccidiosis. Results suggested also for further analysis, models tackling the complexity of the genetic architecture of these correlated disease resistance traits including potential epistatic effects.</p

    Ranging Behaviour of Commercial Free-Range Broiler Chickens 1: Factors Related to Flock Variability

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    Little is known about the ranging behaviour of chickens. Understanding ranging behaviour is required to improve management and shed and range design to ensure optimal ranging opportunities. Using Radio Frequency Identification technology, we tracked 300 individual broiler chickens in each of four mixed sex ROSS 308 flocks on one commercial farm across two seasons. Ranging behaviour was tracked from the first day of range access (21 days of age) until 35 days of age in winter and 44 days of age in summer. Range use was higher than previously reported from scan sampling studies. More chickens accessed the range in summer (81%) than winter (32%; p p

    Ranging Behaviour of Commercial Free-Range Broiler Chickens 2: Individual Variation

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    Little is known about broiler chicken ranging behaviour. Previous studies have monitored ranging behaviour at flock level but whether individual ranging behaviour varies within a flock is unknown. Using Radio Frequency Identification technology, we tracked 1200 individual ROSS 308 broiler chickens across four mixed sex flocks in two seasons on one commercial farm. Ranging behaviour was tracked from first day of range access (21 days of age) until 35 days of age in winter flocks and 44 days of age in summer flocks. We identified groups of chickens that differed in frequency of range visits: chickens that never accessed the range (13 to 67% of tagged chickens), low ranging chickens (15 to 44% of tagged chickens) that accounted for

    Letter Ruling 99-1: Electronic Retailers

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    The synthesis and characterization of a set of redox-active iron and ruthenium alkynyl complexes of general formula [[M]­Cl<sub>(1–<i>p</i>)</sub>{Cî—ŒCC<sub>6</sub>H<sub>5–<i>m</i></sub>(Cî—ŒCFlu)<sub><i>m</i></sub>}<sub>(1+<i>p</i>)</sub>]­[PF<sub>6</sub>]<sub><i>n</i></sub> are reported (<i>n</i> = 0–1; <i>m</i> = 1–2; [M] = [Fe­(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)­(Îș<sup>2</sup>-dppe)] and <i>p</i> = 1 or [M] = [<i>trans</i>-Ru­(Îș<sup>2</sup>-dppe)<sub>2</sub>] and <i>p</i> = 0–1). The linear and third-order nonlinear optical properties of these new organometallic complexes featuring phenylalkynyl ligands functionalized by 2-fluorenyl (Flu) groups were studied in their stable redox states. Their first electronic transitions are assigned with the help of DFT calculations. We show here that these compounds possess significant third-order NLO responses in the near-IR range for molecules of their size. In particular, the remarkably large 2PA activities of the new Ru­(II) compounds in the 600–800 nm range (<i>Z</i>-scan) make them attractive nonlinear chromophores. Structure–property studies emphasize the importance of para- versus meta-connection of the 2-fluorenylethynyl units on the phenylalkynyl core and reveal that upon progressing from mono- to bis-alkynyl complexes a further increase of the 2PA cross section can be obtained while maintaining linear transparency in the visible range

    Panoramic SETI: Program Update and High-Energy Astrophysics Applications

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    Optical SETI (Search for Extraterrestrial Intelligence) instruments that can explore the very fast time domain, especially with large sky coverage, offer an opportunity for new discoveries that can complement multimessenger and time domain astrophysics. The Panoramic SETI experiment (PANOSETI) aims to observe optical transients with nanosecond to second duration over a wide field-of-view (∌\thicksim2,500 sq.deg.) by using two assemblies of tens of telescopes to reject spurious signals by coincidence detection. Three PANOSETI telescopes, connected to a White Rabbit timing network used to synchronize clocks at the nanosecond level, have been deployed at Lick Observatory on two sites separated by a distance of 677 meters to distinguish nearby light sources (such as Cherenkov light from particle showers in the Earth's atmosphere) from astrophysical sources at large distances. In parallel to this deployment, we present results obtained during four nights of simultaneous observations with the four 12-meter VERITAS gamma-ray telescopes and two PANOSETI telescopes at the Fred Lawrence Whipple Observatory. We report PANOSETI's first detection of astrophysical gamma rays, comprising three events with energies in the range between ∌\thicksim15 TeV and ∌\thicksim50 TeV. These were emitted by the Crab Nebula, and identified as gamma rays using joint VERITAS observations.Comment: 9 pages, 5 figures, SPIE Astronomical Telescopes + Instrumentation conference, 2022, Montr\'eal, Qu\'ebec, Canad

    Linear and Third-Order Nonlinear Optical Properties of Fe(n5-C5Me5)(k2-dppe)- and trans-Ru(k2-dppe)2-Alkynyl Complexes Containing 2-Fluorenyl End Groups

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    The synthesis and characterization of a set of redox-active iron and ruthenium alkynyl complexes of general formula [[M]Cl(1–p){C≡CC6H5–m(C≡CFlu)m}(1+p)][PF6]n are reported (n = 0–1; m = 1–2; [M] = [Fe(η5-C5Me5)(Îș2-dppe)] and p = 1 or [M] = [trans-Ru(Îș2-dppe)2] and p = 0–1). The linear and third-order nonlinear optical properties of these new organometallic complexes featuring phenylalkynyl ligands functionalized by 2-fluorenyl (Flu) groups were studied in their stable redox states. Their first electronic transitions are assigned with the help of DFT calculations. We show here that these compounds possess significant third-order NLO responses in the near-IR range for molecules of their size. In particular, the remarkably large 2PA activities of the new Ru(II) compounds in the 600–800 nm range (Z-scan) make them attractive nonlinear chromophores. Structure–property studies emphasize the importance of para- versus meta-connection of the 2-fluorenylethynyl units on the phenylalkynyl core and reveal that upon progressing from mono- to bis-alkynyl complexes a further increase of the 2PA cross section can be obtained while maintaining linear transparency in the visible range
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