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See detailEvolution of nuclear shells with the Skyrme density dependent interaction
Brink, D. M.; Stancu, Floarea ULg

in Physical Review C (2007), 75(6), 064311

We present the evolution of the shell structure of nuclei in Hartree-Fock calculations using Skyrme's density-dependent effective nucleon-nucleon interaction. The role of the tensor part of the Skyrme ... [more ▼]

We present the evolution of the shell structure of nuclei in Hartree-Fock calculations using Skyrme's density-dependent effective nucleon-nucleon interaction. The role of the tensor part of the Skyrme interaction to the Hartree-Fock spin-orbit splitting in spherical spin unsaturated nuclei is reanalyzed. The contribution of a finite range tensor force to the spin-orbit splitting in closed shell nuclei is calculated. It is found that the exact matrix elements of a Gaussian and of a one-pion exchange tensor potential could be written as a product Skyrme's short range expression times a suppression factor which is almost constant for closed shell nuclei with mass number A >= 48. The suppression factor is similar to 0.15 for the one-pion exchange potential. [less ▲]

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See detailEvolution of ontogenetic allometry shaping giant species: a case study from the damselfish genus Dascyllus (Pomacentridae)
Frederich, Bruno ULg; Sheets, David

in Biological Journal of the Linnean Society (2010), 99(1), 99-117

The evolution of body size, the paired phenomena of giantism and dwarfism, has long been studied by biologists and paleontologists. However, detailed investigations devoted to the study of the evolution ... [more ▼]

The evolution of body size, the paired phenomena of giantism and dwarfism, has long been studied by biologists and paleontologists. However, detailed investigations devoted to the study of the evolution of ontogenetic patterns shaping giant species are scarce. The damselfishes of the genus Dascyllus appear as an excellent model for such a study. Their well understood phylogeny reveals that large-bodied species have evolved in two different clades. Geometric morphometric methods were used to compare the ontogenetic trajectories of the neurocranium and the mandible in both small-bodied (Dascyllus aruanus and Dascyllus carneus; maximum size: 50–65 mm standard length) and giant (Dascyllus trimaculatus and Dascyllus flavicaudus; maximum size: 90–110 mm standard length) Dascyllus species. At their respective maximum body size, the neurocranium of the giant species is significantly shorter and have a higher supraoccipital crest relative to the small-bodied species, whereas mandible shape variation is more limited and is not related to the ‘giant’ trait. The hypothesis of ontogenetic scaling whereby the giant species evolved by extending the allometric trajectory of the small-bodied ones (i.e. hypermorphosis) is rejected. Instead, the allometric trajectories vary among species by lateral transpositions. The rate of shape changes and the type of lateral transposition also differ according to the skeletal unit among Dascyllus species. Differences seen between the two giant species in the present study demonstrate that giant species may appear by varied alterations of the ancestor allometric pattern. [less ▲]

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See detailEvolution of organic debris and palynomorph preservation in two late middle Frasnian sections, southern Dinant Synclinorium border, Belgium
Vanguestaine, M.; Pardo-Trujillo, A.; Coen-Aubert, M. et al

in Bollettino della Società Paleontologica Italiana (1999), 38(2-3), 317-330

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See detailEvolution of paleoclimatic conditions and vegetation change in Himalaya from compound specific hydrogen and carbon analyses
Palhol, F.; Galy, V.; France-Lanord, C. et al

in Geochimica et Cosmochimica Acta (2006), 70(18), 468-468

Supplied by the Ganga–Brahmaputra fluvial system, the Bengal Fan provides an integrated record of the Himalayan basin history through time. The active channel-levee system of the middle fan documents the ... [more ▼]

Supplied by the Ganga–Brahmaputra fluvial system, the Bengal Fan provides an integrated record of the Himalayan basin history through time. The active channel-levee system of the middle fan documents the last glacial/interglacial cycle. Organic geochemistry studies have shown that the organic matter contained in the Bengal Fan sediments is mainly of terrestrial origin. We analysed terrestrial n-alkanes (C27–C33) from Bengal Fan sediments and modern Ganga–Brahmaputra sediments. Comparison of compound specific hydrogen and carbon isotopic ratios in these samples allow us to follow the evolution of paleoenvironmental conditions since the Last Glacial Maximum. Carbon molecular isotopic data on the odd-HMW n-alkanes show a shift of 4&, corresponding to an evolution in the Himalayan system from a C4-dominated vegetation at LGM to a C3- dominated vegetation during the Holocene. It is now well known that C4 plants are more adapted than C3 plants to low atmospheric CO2 concentrations and to relatively hot and dry climate. In the same time, molecular D/H isotopic ratios measured on the same samples show an increase of the deuterium content of about 20& during the Holocene, which is consistent with lower temperature at the end of the LGM in the Himalaya. As low temperature should favored C3 plants, the predominance of a C4 vegetation have to be linked with dryer conditions at the end of the LGM. Afterwards, the increase of the C3/C4 ratio in the Himalayan system is related to a concomitant increase of humidity and pCO2 during the Holocene. [less ▲]

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See detailEvolution of phase segregation and eutectic structures in AgPb 18SbTe20
Dadda, J.; Müller, E.; Perlt, S. et al

in Physica Status Solidi A. Applications and Materials Science (2014), 211(6), 1276-1281

The evolution of phase segregation in stoichiometric quenched AgPb mSbTe2+m (m = 18, Lead-Antimony-Silver-Tellurium - LAST-18) compounds was studied starting from the known pseudo-binary diagrams among ... [more ▼]

The evolution of phase segregation in stoichiometric quenched AgPb mSbTe2+m (m = 18, Lead-Antimony-Silver-Tellurium - LAST-18) compounds was studied starting from the known pseudo-binary diagrams among Ag2Te, PbTe, Sb2Te3 and AgSbTe 2. The compositions of secondary phases indicate that liquid phase during cooling, even under quenching conditions, follows mainly the liquidus line on the 2PbTe-Ag0.45Sb0.55Te1.05 quasi-binary section of the phase diagram until it reaches a critical point (18 mol.% of 2PbTe) and then turns to Ag2Te- and Sb2Te 3-rich sides of quasi-ternary system. This has led to the formation of various secondary phases at various stages during the solidification, whose microstructural features and morphology strongly depend upon their chemical composition. Moreover, during solidification the local compositional fluctuations of liquid phase in combination with the shift of liquid composition towards Sb-rich side of the phase diagram resulted in the development of eutectic microstructures in some regions of LAST-18 matrix phase. This suggests there exists a miscibility gap and eutectic point below 600 C on the 2PbTe-Ag0.45Sb0.55Te1.05 boundary line. These eutectic lamellar structures with a cumulative composition close to LAST-3 are on the 200-500 nm length scales and possess thermal conductivity of 0.55-0.65 W/m K at room temperature. The low thermal conductivity of lamellar eutectic structures was later confirmed on bulk samples using laser flash analysis, where the samples were synthesized by quenching and annealing. The results clearly demonstrate that one can engineer the microstructures in LAST compounds by selecting the appropriate initial composition from quasi PbTe-Ag 2Te-Sb2Te3 ternary phase diagram to lower the thermal conductivity further. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. [less ▲]

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See detailThe Evolution of PhD Education in Spain: A Chronological Review of Supra-national and National Actions
Aliaga Isla, Rocio ULg

in Higher Education Teaching and Learning (2017), 7

PhD education in Spain has changed; the current conception of the PhD is different from its initial concept. PhD education policy in Spain has experienced changes in its objectives and structure. Since ... [more ▼]

PhD education in Spain has changed; the current conception of the PhD is different from its initial concept. PhD education policy in Spain has experienced changes in its objectives and structure. Since its membership into the European Community, institutional policies at supra-national and national level have shaped and conditioned such changes. Therefore, how have PhD education policies changed over a long time in Spain? To answer this question, a chronological review has been conducted under the light of institutional theory. Several legal documents enacted at supra-national level are reviewed to frame the changes of PhD education policy at a national level. Moreover, national legal documents are reviewed to follow the evolution of PhD education in Spain. This study shows that PhD education in Spain has experienced rapid changes, which are congruent to some extent with the supra-national policies that have emerged from the social and economic change in the European Union. [less ▲]

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See detailEvolution of pressure distribution during apple compression tests measured with tactile sensors
Kleynen, Olivier; de la Cierva, Sonia; Destain, Marie-France ULg

in Acta Horticulturae (2003), (604),

The paper analyses the ability of thin-film tactile sensors in providing information during static compression tests of ‘Jonagold’ apples (Malus pumila) of different ripeness stages. Such sensors are able ... [more ▼]

The paper analyses the ability of thin-film tactile sensors in providing information during static compression tests of ‘Jonagold’ apples (Malus pumila) of different ripeness stages. Such sensors are able to measure the contact surface and the interfacial pressure distribution during compression of fruits, this latter being characterised by suitable mathematical parameters. Results of compression tests between two flat steel plates are presented. The differentiated evolution of the pressure distribution according to the fruit maturity is pointed out. Ability of the sensor in evaluating the firmness is also discussed. [less ▲]

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See detailEvolution of Salmonella prevalence in foods from animal origin in Belgium, 1997-2000
Ghafir, Y.; François, J.-Y.; Cornélis, M. et al

Poster (2001, June 21)

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See detailEvolution of Saturn's Bright Polar Aurora
Stallard, T.; Grodent, Denis ULg; Badman, S. V. et al

Conference (2009)

Observations of Saturn's infrared aurorae have shown that in addition to the main auroral oval, which is believed to be associated with the solar wind, there are significant polar emissions. Ground-based ... [more ▼]

Observations of Saturn's infrared aurorae have shown that in addition to the main auroral oval, which is believed to be associated with the solar wind, there are significant polar emissions. Ground-based infrared observations of Saturn have been able to show that there is a general level of raised emission across the entire polar region, in a similar way to that seen at Jupiter. However, with direct observations of the aurora made from orbit around Saturn by the Cassini-VIMS instrument, this aurora was shown to be more than a relative generalised brightening in the infrared. Instead, a unique auroral feature was observed to occur, appearing as a large region of bright polar emission, positioned poleward of 82 degrees latitude. This Bright Polar Aurora emission is significantly different from the recently observed subrotating Q-branch auroral emission seen in both the ultraviolet and infrared, as it is separated from the main auroral oval by a region of low emission. This effectively produces a cap of bright aurora inside the main auroral oval, surrounded by a dark ring that separates the two aurorae. Here, we take a more detailed look at this cap of emission and examine the way the auroral feature develops with time. Bright Polar Aurora emission has been observed in two separate VIMS images. A more detailed analysis of the polar emission shows that each of these images in fact differs in structure; the first has auroral emission across the whole polar cap >82 degrees, but within the second the emission is concentrated on the dusk side. While the dramatic in-filling of the polar cap is not seen within any UV observations, the Hubble Space Telescope has observed transitory duskward auroral features within the polar cap, in a similar location to the duskward feature seen in the infrared. Using ground-based infrared observations, which allow a Bright Polar Aurora event to be broken into shorter timescale steps, it is possible analyse the progression of the infrared auroral emission with time, connecting the morphology seen within the two VIMS images with those in the ultraviolet. [less ▲]

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See detailEvolution of serum adiponectin and inflammatory markers in naturally-obese and obese-induced dogs submitted to a weight loss program
Ricci, Rebecca; Manens, Jefferson; Damoiseaux, Cécile et al

in ESVCN (Ed.) Proceedings of the 16th Annual Congress of the ESVCN (2012, September)

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See detailEvolution of serum CK-MB isoforms after acute myocardial-infarction
Chapelle, Jean-Paul ULg

in Clinical Chemistry (1989, June), 35(6), 1120

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See detailEvolution of serum creatine kinase (CK)-MB isoforms during and after coronary surgery
Chapelle, Jean-Paul ULg; El Allaf, M.; Faymonville, Marie-Elisabeth ULg et al

in European Heart Journal Supplements : Journal of the European Society of Cardiology (1988), 9(suppl.1), 244

Detailed reference viewed: 17 (0 ULg)