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See detailBackground considerations on masonry structures for the preparation of the Belgian national annex to Eurocode 8
Degée, Hervé ULg; Plumier, André ULg

in Proceedings of the Conference "Seismic Risk - Earthquake in North-Western Europe" (2008)

This contribution summarizes considerations developed to allow a reasonable and consistent definition of the national parameters to be introduced in the Belgian national annex to chapter 9 of Eurocode 8 ... [more ▼]

This contribution summarizes considerations developed to allow a reasonable and consistent definition of the national parameters to be introduced in the Belgian national annex to chapter 9 of Eurocode 8 dealing with seismic design of masonry structures. The different aspects considered are material properties (resistance and ductility), detailing of wall-wall and wall-floor connections and rules for simple masonry buildings. The result is a set of rules consistent with the national practice and defining (i) what is allowed in Belgium for the different seismic zones, (ii) minimal requirements for simple non-engineered buildings and (iii) a procedure that can be followed to improve these rules for materials and structural systems exhibiting better properties than the minimal requirements of Eurocode 8. [less ▲]

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See detailComment on "Transverse rectification in superconducting thin films with arrays of asymmetric defects" [Appl. Phys. Lett. 91, 062505 (2007)]
Silhanek, Alejandro ULg; de Vondel, J Van; Moshchalkov, V. V. et al

in Applied Physics Letters (2008), 92(17),

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See detailLes aspects sociologiques de la transmission du patrimoine familial
Guillaume, Jean-François ULg

in Baugniet, Nathalie; Taymans, Jean-François (Eds.) Planification successorale. Aspects civils et fiscaux (2008)

Quelle place pour la transmission du patrimoine dans les familles contemporaines ? Quelles normes pour organiser le partage des biens entre héritiers ? Ces questions sont envisagées au départ de ... [more ▼]

Quelle place pour la transmission du patrimoine dans les familles contemporaines ? Quelles normes pour organiser le partage des biens entre héritiers ? Ces questions sont envisagées au départ de recherches en sociologie de la famille, réalisées en Belgique et en France. [less ▲]

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See detailLes clignotants
Dantinne, Michaël ULg

in Dantinne, Michaël (Ed.) Blanchiment de capitaux et notariat (2008)

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See detailEmpirical Mode Decomposition in the Reduced-Order Modeling of Aeroelastic Systems
Lee, Young S; McFarland, D. Michael; Vakakis, Alexander F. et al

in 49th AIAA Structural Dynamics and Materials Conference, Shaumberg, 2008 (2008)

A relationship between IntrinsicMode Functions (IMFs), derived from the Empirical Mode Decomposition (EMD), and the slow-flow model of a nonlinear dynamical system has been exploited in the development of ... [more ▼]

A relationship between IntrinsicMode Functions (IMFs), derived from the Empirical Mode Decomposition (EMD), and the slow-flow model of a nonlinear dynamical system has been exploited in the development of the Slow Flow Model Identification (SFMI) method for strongly nonlinear systems, in which the physical parameters of such systems are identified from experimental data. Both the slow flows and IMFs provide the means to expand a general multicomponent signal in terms of a series of simpler, dominant, monocomponent signals. The slow flows are obtained analytically, for example through application of the method of complexification and averaging (CxA), which transforms the equations of motion into a set of approximate equations in amplitude and phase for each modeled frequency component. In contrast, the EMD characterizes a signal through the envelope and phase of its elemental components, the IMFs. Thus, between nonlinear transitions, the equations derived using the CxA method govern the amplitude and phase of the modeled IMFs. Application of SFMI has, until now, been limited to low-dimensional systems subjected to impulsive excitation. Herein, the method is extended to identification of a planar rigid airfoil [less ▲]

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See detailFirst-principles study of the dielectric and dynamical properties of orthorhombic CaMnO3
Bhattacharjee, Satadeep; Bousquet, Eric ULg; Ghosez, Philippe ULg

in Journal of Physics : Condensed Matter (2008), 20

The structural, dielectric and dynamical properties of the low temperature antiferromagnetic orthorhombic phase of CaMnO3 have been computed from first principles, using a density functional theory ... [more ▼]

The structural, dielectric and dynamical properties of the low temperature antiferromagnetic orthorhombic phase of CaMnO3 have been computed from first principles, using a density functional theory approach within the local spin density approximation. The theoretical structural parameters are in good agreement with experiment. The full set of zone-center phonons is reported, allowing new assignment of experimental Raman data and providing reference values for the interpretation of future infrared phonon measurements. It is shown that the static dielectric constant is very large and comparable in amplitude to that of isostructural CaTiO3. In contrast to the pseudocubic structure, it is also highly anisotropic. These features are discussed in relationship to the anomalous Born effective charges and the presence of low frequency polar modes. [less ▲]

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See detailPosition du sujet et politique du corps dans Les Chants de Maldoror
Durand, Pascal ULg

in Bon-A-Tirer : Revue Littéraire en Ligne (2008), 77

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See detailFunctional Analysis and the Finite Element Method
Stainier, Laurent; Tossings, Patricia ULg

Learning material (2008)

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See detailEnhancement of the poly/mono growth rate ratio for BiCMOS application
Nguyen, Ngoc Duy ULg; Loo, Roger

Report (2008)

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See detailConcerns, expectations and perception regarding stature, physical appearance and psychosocial functioning before and during high-dose growth hormone treatment of short pre-pubertal children born small for gestational age.
Lagrou, K.; Froidecoeur, C.; Thomas, M. et al

in Hormone Research (2008), 69(6), 334-42

BACKGROUND/AIMS: Few data are available about parental concerns and psychosocial functioning of young children born small for gestational age (SGA) treated with growth hormone (GH). The present study ... [more ▼]

BACKGROUND/AIMS: Few data are available about parental concerns and psychosocial functioning of young children born small for gestational age (SGA) treated with growth hormone (GH). The present study focused on the perception of short stature and the concerns and expectations of the parents regarding GH treatment. METHODS: Forty prepubertal short SGA children, randomized into a GH-treated and a GH-untreated group, and their parents were evaluated by a questionnaire and a semi-structured interview at start and after 2 years of follow-up. RESULTS: Before start, 85% of the parents were concerned about short stature, 76% expected an increase in adult height of > or =10 cm and 81% expected a positive impact on well-being. Half of the parents expressed fears regarding GH treatment. After 2 years, more parents of treated children reported obvious growth and physical changes, and fewer parents reported teasing because of short stature. An improvement of well-being was reported by half of the parents of treated and untreated children. Fears about GH treatment disappeared almost completely. CONCLUSION: The perspective of GH treatment induced major adult height expectations. In treated children, the physical effects of GH treatment became obvious, teasing because of short stature decreased and initial concerns about short stature and GH therapy decreased. [less ▲]

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See detailNative and recombinant bovine placental lactogens.
Alvarez Oxiley, Andrea Vivian ULg; Melo de Sousa, Noelita ULg; Beckers, Jean-François ULg

in Reproductive Biology (2008), 8(2), 85-106

The bovine placenta produces a wide variety of proteins that are structurally and functionally similar to the pituitary proteins from the GH/PRL gene family. Bovine placental lactogen (bPL) is a 200-amino ... [more ▼]

The bovine placenta produces a wide variety of proteins that are structurally and functionally similar to the pituitary proteins from the GH/PRL gene family. Bovine placental lactogen (bPL) is a 200-amino acid long glycoprotein hormone that exhibits both lactogenic and somatogenic properties. The apparent molecular masses of purified native (n) bPL molecules (31-33 kDa) exceed 23 041 Da, which is the theoretical molecular mass of the protein core. At least six isoelectric variants (pI: 4.85-6.3) of bPL were described in cotyledonary extracts and three different bPL isoforms (pI: 4.85-5.25) were found in fetal sera. The bPL molecules that are detected in higher concentrations in peripheral circulation exhibit a more acidic pI than those present in placental homogenates. This may reflect an important glycosylation process occurring just prior to the bPL secretion. The bPL mRNA is transcribed in trophectoderm binucleate cells starting from Day 30 of pregnancy until the end of gestation. In mothers, bPL is involved in the regulation of ovarian function, mammogenesis, lactogenesis, and pregnancy stage-dependent adaptation of nutrient supplies to the fetus. Due to the higher fetal, compared to maternal concentrations of circulating hormone, it has been suggested that bPL primarily targets fetal tissues. [less ▲]

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See detailVibration Mitigation of Nonlinear Vibrating Structures using Nonlinear Energy Sinks
Viguié, Régis ULg; Peeters, Maxime ULg; Kerschen, Gaëtan ULg et al

in 26th International Modal Analysis Conference, Orlando, 2008 (2008)

The tuned mass damper (TMD) is a simple and efficient device, but it is only effective when it is precisely tuned to the frequency of a vibration mode. Because nonlinear vibrating structures have resonant ... [more ▼]

The tuned mass damper (TMD) is a simple and efficient device, but it is only effective when it is precisely tuned to the frequency of a vibration mode. Because nonlinear vibrating structures have resonant frequencies that vary with the amount of total energy in the system, the efficiency of a TMD is questionable in this case. In the present study, the performance of an essentially nonlinear attachment, termed a nonlinear energy sink (NES), is assessed. It is shown that, unlike the TMD, an NES has no preferential resonant frequency, which makes it a good candidate for vibration mitigation of nonlinear vibrating structures. [less ▲]

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See detailWater and Habitability, FNRS contact group workshop, Abstracts and Program, ROB Brussels nov 20th 2008
Dehant, Véronique; Javaux, Emmanuelle ULg

Book (2008)

Water and Habitability, FNRS contact group workshop, Abstracts and Program, ROB Brussels nov 20th 2008

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See detailCOMPUTATION OF NONLINEAR NORMAL MODES, PART I: NUMERICAL CONTINUATION IN MATLAB
Peeters, Maxime ULg; Viguié, Régis ULg; Serandour, Guillaume et al

in Sixth EUROMECH Nonlinear Dynamics Conference, Saint Petersbourg, 2008 (2008)

The concept of nonlinear normal modes (NNMs) is discussed in the present paper and its companion, Part II. Because there is virtually no application of the NNMs to large-scale engineering structures ... [more ▼]

The concept of nonlinear normal modes (NNMs) is discussed in the present paper and its companion, Part II. Because there is virtually no application of the NNMs to large-scale engineering structures, these papers are an attempt to highlight one aspect that might drive their development in the future. Specifically, we support that numerical methods for the continuation of periodic solutions pave the way for an effective and practical computation of NNMs. In this context, we show that the NNM computation is possible with limited implementation effort. The proposed algorithm, implemented in MATLAB, relies on two main techniques, namely a shooting procedure and a method for the continuation of NNM motions. The algorithm is demonstrated using a 2DOF nonlinear system. A comparison with the results given by the AUTO software is achieved in Part II. [less ▲]

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See detailFrom spectrophotometry to multispectral imaging of ore minerals in visible and near infrared (VNIR) microscopy.
Pirard, Eric ULg; Bernhardt, Heinz-Juergen; Catalina, Juan-Carlos et al

in GU; BUTCHER (Eds.) Proceedings of ICAM 2008 (2008)

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See detailFollicular dendritic cells control engulfment of apoptotic bodies by secreting Mfge8.
Kranich, Jan; Krautler, Nike Julia; Heinen, Ernst ULg et al

in Journal of Experimental Medicine (2008), 205(6), 1293-302

The secreted phosphatidylserine-binding protein milk fat globule epidermal growth factor 8 (Mfge8) mediates engulfment of apoptotic germinal center B cells by tingible-body macrophages (TBMphis ... [more ▼]

The secreted phosphatidylserine-binding protein milk fat globule epidermal growth factor 8 (Mfge8) mediates engulfment of apoptotic germinal center B cells by tingible-body macrophages (TBMphis). Impairment of this process can contribute to autoimmunity. We show that Mfge8 is identical to the mouse follicular dendritic cell (FDC) marker FDC-M1. In bone-marrow chimeras between wild-type and Mfge8(-/-) mice, all splenic Mfge8 was derived from FDCs rather than TBMphis. However, Mfge8(-/-) TBMphis acquired and displayed Mfge8 only when embedded in Mfge8(+/+) stroma, or when situated in lymph nodes draining exogenous recombinant Mfge8. These findings indicate a licensing role for FDCs in TBMphi-mediated removal of excess B cells. Lymphotoxin-deficient mice lacked FDCs and splenic Mfge8, and suffer from autoimmunity similar to Mfge8(-/-) mice. Hence, FDCs facilitate TBMphi-mediated corpse removal, and their malfunction may be involved in autoimmunity. [less ▲]

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See detailThe Minimal Fusion Peptide Of Simian Immunodeficiency Virus Corresponds To The 11 First Residues Of Gp32
Lorin, A.; Lins, Laurence ULg; Stroobant, V. et al

in Journal of Peptide Science (2008), 14(4), 423-8

We had previously predicted successfully the minimal fusion peptides (FPs) of the human immunodeficiency virus 1 (HIV-1) gp41 and the bovine leukemia virus (BLV) gp30 using an original approach based on ... [more ▼]

We had previously predicted successfully the minimal fusion peptides (FPs) of the human immunodeficiency virus 1 (HIV-1) gp41 and the bovine leukemia virus (BLV) gp30 using an original approach based on the obliquity/fusogenicity relationship of tilted peptides. In this paper, we have used the same method to predict the shortest FP capable of inducing optimal fusion in vitro of the simian immunodeficiency virus (SIV) mac isolate and of other SIVs and human immunodeficiency virus (HIV-2) isolates. In each case, the 11-residue-long peptide was predicted as the minimal FP. For the SIV mac isolate, liposome lipid-mixing and leakage assays confirmed that this peptide is the shortest peptide inducing optimal fusion in vitro, being therefore the minimal FP. These results are another piece of evidence that the tilted properties of FPs are important for the fusion process and that our method can be used to predict the minimal FPs of other viruses. [less ▲]

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See detailIdentification of the Slow-Flow Dynamics of Transonic Aeroelastic Response from Time-Series Data
Lee, Y. S.; Vakakis, Alexander F.; McFarland, D. M. et al

in 45th Technical Meeting of the Society of Engineering Science, Urbana Champaign, 2008 (2008)

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See detailModeling the sound transmission coupled through partition walls using a diffusion model
Billon, Alexis ULg; Foy, Cédric; Picaut, Judicaël et al

in Journal of the Acoustical Society of America (2008), 123(6), 4261-4271

In this paper, a modification of the diffusion model for room acoustics is proposed to account for sound transmission between two rooms, a source room and an adjacent room, which are coupled through a ... [more ▼]

In this paper, a modification of the diffusion model for room acoustics is proposed to account for sound transmission between two rooms, a source room and an adjacent room, which are coupled through a partition wall. A system of two diffusion equations, one for each room, together with a set of two boundary conditions, one for the partition wall and one for the other walls of a room, is obtained and numerically solved. The modified diffusion model is validated by numerical comparisons with the statistical theory for several coupled-room configurations by varying the coupling area surface, the absorption coefficient of each room, and the volume of the adjacent room. An experimental comparison is also carried out for two coupled classrooms. The modified diffusion model results agree very well with both the statistical theory and the experimental data. The diffusion model can then be used as an alternative to the statistical theory, especially when the statistical theory is not applicable, that is, when the reverberant sound field is not diffuse. Moreover, the diffusion model allows the prediction of the spatial distribution of sound energy within each coupled room, while the statistical theory gives only one sound level for each room. [less ▲]

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