| 1. |
- Kröll, T., et al.
(författare)
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Transfer Reactions on Neutron-rich Nuclei at REX-ISOLDE
- 2009
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Ingår i: AIP Conference Proceedings. - 1551-7616 .- 0094-243X. ; 1165, s. 363-368 461
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Konferensbidrag (refereegranskat)abstract
- We report on one- and two-neutron transfer reactions to study the single-particle properties of nuclei at the border of the "island of inversion". The (d,p)- and (t,p)-reactions in inverse kinematics on the neutron-rich isotope Mg-30, delivered as radioactive beam by the REX-ISOLDE facility, have been investigated. The outgoing protons have been detected and identified by a newly built array of Si detectors. The gamma-decay of excited states has been detected in coincidence by the MINIBALL array. First results for Mg-31 and from the search for the second, spherical, 0(+) state in Mg-32 are presented.
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| 2. |
- Richards, Stephen, et al.
(författare)
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The genome of the model beetle and pest Tribolium castaneum.
- 2008
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Ingår i: Nature. - 1476-4687. ; 452:7190, s. 949-55
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Tidskriftsartikel (refereegranskat)abstract
- Tribolium castaneum is a representative of earth’s most numerous eukaryotic order, a powerful model organism for the study of generalized insect development, and also an important pest of stored agricultural products. We describe its genome sequence here. This omnivorous beetle has evolved an ability to interact with a diverse chemical environment as evidenced by large expansions in odorant and gustatory receptors, as well as p450 and other detoxification enzymes. Developmental patterns in Tribolium are more representative of other arthropods than those found in Drosophila, a fact represented in gene content and function. For one, Tribolium has retained more ancestral genes involved in cell-cell communication than Drosophila, and some are expressed in the growth zone crucial for axial elongation in short germ development. Systemic RNAi in T. castaneum appears to use mechanisms distinct from those found in C. elegans, but nevertheless offers similar power for the elucidation of gene function and identification of targets for selective insect control.
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| 3. |
- Van de Walle, J., et al.
(författare)
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In-trap decay of Mn-61 and Coulomb excitation of Mn-61/Fe-61
- 2009
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Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 42:3, s. 401-406
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Konferensbidrag (refereegranskat)abstract
- At ISOL ( Isotope Separator On-Line) facilities, which utilize thick primary production targets, beams of neutron-rich iron isotopes are dificult to obtain due to the long extraction time of these isotopes out of the target matrix. At REX-ISOLDE, an exploratory experiment was carried out to investigate the possibility of producing a post-accelerated beam of neutron-rich iron isotopes by the in-trap decay of neutron-rich manganese isotopes, which are available at ISOLDE using the Resonance Ionization Laser Ion Source (RILIS). This production mechanism was tested for the first time at REX-ISOLDE with an intense and short-lived beam of Mn-61 isotopes. In this work, the proof of principle of this method is demonstrated, although the technical details of the trapping process are currently not well understood and are still under investigation. The first physics results on the Coulomb excitation of Mn-61 and Fe-61 are presented and compared to shell model calculations.
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| 4. |
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| 5. |
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| 6. |
- Wimmer, M. A., et al.
(författare)
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What are the future possibilities of eDemocracy? : A discussion paper
- 2007
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Ingår i: Electronic Government, Proceedings. - 9783540744436 ; , s. 401-411
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper presents some future possibilities for eDemocracy tools and considers how these new technologies might conflict with our basic assumptions about what democracy should be. I hope this paper will contribute to discussion of under what situations different forms of eDemocracy are appropriate. The possibilities and repercussions of user profiling, voting outside of polling booths, longer decision-making periods, changeable election results and weighted voted are considered. Although none are necessarily advisable, this paper suggests they might be interesting to consider.
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| 7. |
- Wimmer, Matthias, et al.
(författare)
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Estudio experimental sobre la volabilidad de las rocas
- 2008
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Ingår i: Rocas y Minerales. - 0378-3316. ; 35:439, s. 46-57
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Tidskriftsartikel (refereegranskat)abstract
- Este artículo estudia la volabilidad de una roca a través de la piedra crítica, definida ésta como la piedra máxima para la que se rompe completamente la roca desde el barreno a la cara libre. El procedimiento aplicado consiste en perforar y disparar un barreno inclinado desde la cara libre de forma que la piedra aumente con la profundidad a lo largo del barreno y aplicar métodos fotogramétricos y de análisis en 3D para determinar las características de la zona excavada: área excavada, sobreexcavación y anchura a varias profundidades, mediante la obtención de secciones planas de la excavación. La piedra crítica se asocia al mínimo de un factor de forma de la sección excavada. Se han realizado once ensayos de volabilidad a escala real en anfibolita, magnesita y caliza y tres a escala reducida en mortero de magnetita. La piedra crítica define el límite superior que en ningún caso deberá superarse en la práctica. No obstante, para iguales parámetros de voladura, la definición de piedra óptima dependerá del resultado perseguido; si éste es el de optimizar la fragmentación con vistas a la reducción de finos, la piedra óptima será aquella para la que el área de la sección excavada es máxima, que coincidirá con un consumo específico mínimo. El estudio de las áreas excavadas para la piedra óptima obtenidas experimentalmente es igualmente útil para cuantificar interacciones entre barrenos adyacentes y por tanto para deducir el espaciado de barrenos. Finalmente se analiza la influencia de las características geotécnicas de la roca sobre el área de la zona excavada y las piedras críticas y óptimas.
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