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See detailHow shattered flakes were used : Micro-wear analysis of quartz flake fragments
Knutsson, Helena; Knutsson, Kjel; Taipale, Noora ULg et al

in Journal of Archaeological Science: Reports (2015), 2

Prehistoric quartz assemblages have always posed a special problem for archaeologists. Due to its brittle nature, quartz is hard to understand within lithic classification systems that are based on ... [more ▼]

Prehistoric quartz assemblages have always posed a special problem for archaeologists. Due to its brittle nature, quartz is hard to understand within lithic classification systems that are based on formally varied flint assemblages. In this paper we explore ways to deal with this problem by applying two analytical methods, fracture analysis and use-wear analysis. A sample of 544 unmodified quartz flakes and flake fragments from Mesolithic and Neolithic sites in Sweden and Finland was analysed. It can be concluded that both whole and fragmented flakes were used as tools. Larger flakes and flake fragments were preferred as tool blanks and the type of use was correlated to variation in edge qualities rather than the formal characteristics of flakes. The results of this investigation suggest that making behavioural inferences from quartz assemblages with low formal variability requires the assemblages to be approached with a focus on functional types. [less ▲]

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See detailHow should functional imaging of patients with disorders of consciousness contribute to their clinical rehabilitation needs?
Laureys, Steven ULg; Giacino, J. T.; Schiff, N. D. et al

in Current Opinion in Neurology (2006), 19(6), 520-527

Purpose of review We discuss the problems of evidence-based neurorehabilitation in disorders of consciousness, and recent functional neuroimaging data obtained in the vegetative state and minimally ... [more ▼]

Purpose of review We discuss the problems of evidence-based neurorehabilitation in disorders of consciousness, and recent functional neuroimaging data obtained in the vegetative state and minimally conscious state. Recent findings Published data are insufficient to make recommendations for or against any of the neurorehabilitative treatments in vegetative state and minimally conscious state patients. Electrophysiological and functional imaging studies have been shown to be useful in measuring residual brain function in noncommunicative brain-damaged patients. Despite the fact that such studies could in principle allow an objective quantification of the putative cerebral effect of rehabilitative treatment in the vegetative state and minimally conscious state, they have so far not been used in this context. Summary Without controlled studies and careful patient selection criteria it will not be possible to evaluate the potential of therapeutic interventions in disorders of consciousness. There also is a need to elucidate the neurophysiological effects of such treatments. Integration of multimodal neuroimaging techniques should eventually improve our ability to disentangle differences in outcome on the basis of underlying mechanisms and better guide our therapeutic options in the challenging patient populations encountered following severe acute brain damage. [less ▲]

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See detailHow should we proceed when a myocardial infarction is suspected
Chapelle, Jean-Paul ULg

in Acta Clinica Belgica (1984), 39(6), 393-5

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See detailHow should zoster trials be conducted?
Wood, M. J.; Balfour, Hank; Beutner, Karl et al

in Journal of Antimicrobial Chemotherapy (1995), 36(6), 1089-1101

In 1994, an international group of interested clinicians and biostatisticians met to discuss the design of clinical trials in herpes tester. They agreed that trials in herpes tester should have ... [more ▼]

In 1994, an international group of interested clinicians and biostatisticians met to discuss the design of clinical trials in herpes tester. They agreed that trials in herpes tester should have prospectively agreed definitions of all outcome measures and plans for data analysis. In immunocompetent individuals, in whom pain is the major outcome measure, trials should only include patients over the age of 50 years, and for those recruited within 72 fi of rash onset, should be designed to demonstrate superiority of any new therapy over existing antivirals. The primary endpoint should be time to cessation of pain for at least 4 weeks and, for the purposes of statistical analysis of its duration, the pain associated with herpes tester ought to be considered as a continuum. All other variables, including the incidence of post-herpetic neuralgia and effects upon quality of life should be considered as secondary end-points. Evaluation of treatment effects on primary endpoints should be based upon an intent-to-treat (ITT) analysis and subgroup analysis should be used only to support the findings of the ITT analysis. These elements of good study design should be borne in mind in the evaluation of current and future trails of antiviral drugs in herpes zoster. [less ▲]

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See detailHow snow affects air-sea ice CO2 fluxes ?
Delille, Bruno ULg; Kotovitch, Marie ULg; Van Der Linden, Fanny ULg et al

Poster (2015, March)

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See detailHow Stable are the Major Performance Measures?
Bodson, Laurent ULg; Coën, Alain ULg; Hübner, Georges ULg

in Journal of Performance Measurement (2008), (Fall), 21-30

In this paper, the authors compare three usual performance measures of actively managed portfolios: Jensen’s Alpha, the Information Ratio (IR), and the newly proposed Generalized Treynor Ratio (GTR ... [more ▼]

In this paper, the authors compare three usual performance measures of actively managed portfolios: Jensen’s Alpha, the Information Ratio (IR), and the newly proposed Generalized Treynor Ratio (GTR) introduced by Hübner (2005). They focus on model specification, sensitivity, and persistence for a large sample of mutual funds from January 1996 to December 2006. Their results reveal that fund classification made with the GTR displays a higher stability while the IR exhibits a greater capacity to reveal persistence in performance. The value of alpha is clearly contingent on model specifications and thus needs to be considered with greater caution to perform ranking of portfolio managers. [less ▲]

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See detailHow tDCS can help patients with disorders of consciousness?
Thibaut, Aurore ULg

Conference (2014, July)

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See detailHow teacher teach : analysis of verbal interaction in the classroom
de Landsheere, Gilbert ULg

in Classroom Interaction Newsletter (1971), décembre

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See detailHow the *H-particle* unravels the quark dynamics
Stancu, Floarea ULg; Pepin, S.; Glozman, L Ya

in Physical Review. D : Particles and Fields (1998), D57

It is shown that the short-range part of the Goldstone boson exchange interaction between the constituent quarks, which explains baryon spectroscopy and the short-range repulsion in the NN system, induces ... [more ▼]

It is shown that the short-range part of the Goldstone boson exchange interaction between the constituent quarks, which explains baryon spectroscopy and the short-range repulsion in the NN system, induces a strong short-range repulsion in the flavour-singlet state of the $S=-2$ system with $J^P=0^+$. This suggests that a deeply bound H-particle should not exist. We compare our approach with other models employing different hyperfine interactions between quarks in the nonperturbative regime of QCD. [less ▲]

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See detailHow the debate on the protection of IDPs could inform the debate on the protection of environmental migrations
Gemenne, François ULg; Brücker, Pauline

Conference (2012, December 06)

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See detailHow the DNA damage response determines the fate of HTLV-1 Tax-expressing cells
Boxus, Mathieu ULg; Willems, Luc ULg

in Retrovirology (2012), 9(2),

How the Human T lymphotropic virus type 1 (HTLV-1) Tax protein stimulates proliferation while triggering cell cycle arrest and senescence remains puzzling. There is also a debate about the ability of Tax ... [more ▼]

How the Human T lymphotropic virus type 1 (HTLV-1) Tax protein stimulates proliferation while triggering cell cycle arrest and senescence remains puzzling. There is also a debate about the ability of Tax to activate or inhibit the DNA damage response. Here, we comment on these different activities and propose a conceptual rationale for the apparently conflicting observations. [less ▲]

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See detailHow the financial crash of October 1997 could have been predicted
Vandewalle, Nicolas ULg; Ausloos, Marcel ULg; Boveroux, P. et al

in European Physical Journal B -- Condensed Matter (1998), 4(2), 139-141

From the analysis of (closing value) stock market index like the Dow Jones Industrial average and the S&P500 it is possible to observe the precursor of a so-called crash. This is shown on the Oct. 1987 ... [more ▼]

From the analysis of (closing value) stock market index like the Dow Jones Industrial average and the S&P500 it is possible to observe the precursor of a so-called crash. This is shown on the Oct. 1987 and Oct. 1997 cases. The data analysis indicates that the index divergence has followed twice a "universal"; behavior, i.e. a logarithmic dependence, superposed on a well defined oscillation pattern. The prediction of the crash date is remarkable and can be done two months in advance. In the spirit of phase transition phenomena, the economic index is said to be analogous to a signal signature found in a two dimensional fluid of vortices. [less ▲]

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See detailHow the genomic environment of the HTLV-1 provirus impacts on clone fitness
Gillet, Nicolas ULg; Malani, Nirav; Berry, Charles et al

Conference (2010, May)

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See detailHow The Semiotic Square Came
Badir, Sémir ULg

in Beziau, Jean-Yves; Payette, Gillman (Eds.) The Square of Opposition. A General Framework for Cognition (2012)

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See detailHow they became the human face of climate change. Research and policy interactions in the birth of the ‘environmental migration’ concept.
Gemenne, François ULg

in Piguet, Etienne; Pécoud, Antoine; De Guchteneire, Paul (Eds.) Migration and Climate Change (2011)

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See detailHow Tightly Linked Are Pericopsis elata (Fabaceae) Patches to Anthropogenic Disturbances in Southeastern Cameroon?
Bourland, Nils; Cerisier, François; Daïnou, Kasso ULg et al

in Forests (2015), 6(2), 293-310

While most past studies have emphasized the relationships between specific forest stands and edaphic factors, recent observations in Central African moist forests suggested that an increase of slash-and ... [more ▼]

While most past studies have emphasized the relationships between specific forest stands and edaphic factors, recent observations in Central African moist forests suggested that an increase of slash-and-burn agriculture since 3000–2000 BP (Before Present) could be the main driver of the persistence of light-demanding tree species. In order to examine anthropogenic factors in the persistence of such populations, our study focused on Pericopsis elata, an endangered clustered timber species. We used a multidisciplinary approach comprised of botanical, anthracological and archaeobotanical investigations to compare P. elata patches with surrounding stands of mixed forest vegetation (“out-zones”). Charcoal samples were found in both zones, but were significantly more abundant in the soils of patches. Eleven groups of taxa were identified from the charcoals, most of them also present in the current vegetation. Potsherds were detected only inside P. elata patches and at different soil depths, suggesting a long human presence from at least 2150 to 195 BP, as revealed by our charcoal radiocarbon dating. We conclude that current P. elata patches most likely result from shifting cultivation that occurred ca. two centuries ago. The implications of our findings for the dynamics and management of light-demanding tree species are discussed. [less ▲]

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See detailHow to analyse thermodynamic properties of solids and liquids in relation with adhesion?
Courard, Luc ULg

in Ohama, Yoshihiko; Puterman, Moshe (Eds.) Proceedings of the 2nd International RILEM Symposium ISAP 99 (1999)

Detailed reference viewed: 14 (0 ULg)