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See detailForbidden lines of CrII, Ni II, and Fe II
Swings, Polydore ULg

in Publications of the Astronomical Society of the Pacific [=PASP] (1944), 56

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See detailForbidden lines of ionized nickel in the spectra of bright-line stars
Swings, Polydore ULg

in Publications of the Astronomical Society of the Pacific [=PASP] (1943), 55

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See detailForbidden oxygen lines at various nucleocentric distances in comets
Decock, Alice ULg; Jehin, Emmanuel ULg; Rousselot, P. et al

in Astronomy and Astrophysics (2015), 573

Aims: We study the formation of the [OI] lines - that is, 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in the coma of comets and determine the parent species of the oxygen ... [more ▼]

Aims: We study the formation of the [OI] lines - that is, 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in the coma of comets and determine the parent species of the oxygen atoms using the ratio of the green-to-red-doublet emission intensity, I[SUB]5577[/SUB]/(I[SUB]6300[/SUB] + I[SUB]6364[/SUB]), (hereafter the G/R ratio) and the line velocity widths. <BR /> Methods: We acquired high-resolution spectroscopic observations at the ESO Very Large Telescope of comets C/2002 T7 (LINEAR), 73P-C/Schwassmann-Wachmann 3, 8P/Tuttle, and 103P/Hartley 2 when they were close to Earth (<0.6 au). Using the observed spectra, which have a high spatial resolution (<60 km/pixel), we determined the intensities and widths of the three [OI] lines. We spatially extracted the spectra to achieve the best possible resolution of about 1-2'', that is, nucleocentric projected distances of 100 to 400 km depending on the geocentric distance of the comet. We decontaminated the [OI] green line from C[SUB]2[/SUB] lines blends that we identified. <BR /> Results: The observed G/R ratio in all four comets varies as a function of nucleocentric projected distance (between ~0.25 to ~0.05 within 1000 km). This is mainly due to the collisional quenching of O([SUP]1[/SUP]S) and O([SUP]1[/SUP]D) by water molecules in the inner coma. The observed green emission line width is about 2.5 km s[SUP]-1[/SUP] and decreases as the distance from the nucleus increases, which can be explained by the varying contribution of CO[SUB]2[/SUB] to the O([SUP]1[/SUP]S) production in the innermost coma. The photodissociation of CO[SUB]2[/SUB] molecules seem to produce O([SUP]1[/SUP]S) closer to the nucleus, while the water molecule forms all the O([SUP]1[/SUP]S) and O([SUP]1[/SUP]D) atoms beyond 10[SUP]3[/SUP] km. Thus we conclude that the main parent species producing O([SUP]1[/SUP]S) and O([SUP]1[/SUP]D) in the inner coma is not always the same. The observations have been interpreted in the framework of the previously described coupled-chemistry-emission model, and the upper limits of the relative abundances of CO[SUB]2[/SUB] were derived from the observed G/R ratios. Measuring the [OI] lines might provide a new way to determine the CO[SUB]2[/SUB] relative abundance in comets. Based on observations made with ESO Telescope at the La Silla Paranal Observatory under programs ID 073.C-0525, 277.C-5016, 080.C-0615 and 086.C-0958.Tables 3 and 4 are available in electronic form at <A href="http://www.aanda.org/10.1051/0004-6361/201424403/olm">http://www.aanda.org</A> [less ▲]

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See detailForbidden oxygen lines in comets at various heliocentric distances
Decock, Alice ULg; Jehin, Emmanuel ULg; Hutsemekers, Damien ULg et al

in Astronomy and Astrophysics (2013), 555

We present a study of the three forbidden oxygen lines [OI] located in the optical region - i.e., 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in order to better understand ... [more ▼]

We present a study of the three forbidden oxygen lines [OI] located in the optical region - i.e., 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in order to better understand the production of these atoms in cometary atmospheres. The analysis is based on 48 high-resolution and high signal-to-noise spectra collected with UVES at the ESO VLT between 2003 and 2011 referring to 12 comets of different origins observed at various heliocentric distances. The flux ratio of the green line to the sum of the two red lines is evaluated to determine the parent species of the oxygen atoms by comparison with theoretical models. This analysis confirms that, at about 1 AU, H[SUB]2[/SUB]O is the main parent molecule producing oxygen atoms. At heliocentric distances >2.5 AU, this ratio changes rapidly, an indication that other molecules are starting to contribute. The most abundant species after H[SUB]2[/SUB]O in the coma, CO and CO[SUB]2[/SUB], are good candidates, and the ratio is used to estimate their abundances. We found that the CO[SUB]2[/SUB] abundance relative to H[SUB]2[/SUB]O in comet C/2001 Q4 (NEAT) observed at 4 AU can be as high as ~70%. The intrinsic widths of the oxygen lines were also measured. The green line is on average about 1 km s[SUP]-1[/SUP] broader than the red lines, while the theory predicts that the red lines are broader. This might be due to the nature of the excitation source or to a contribution of CO[SUB]2[/SUB] as the parent molecule of the 5577.339 Å line. At 4 AU, we found that the width of the green and red lines in comet C/2001 Q4 are the same, which could be explained if CO[SUB]2[/SUB] becomes the main contributor to the three [OI] lines at high heliocentric distances. Based on observations made with ESO Telescope at the La Silla Paranal Observatory under programs ID 268.C-5570, 270.C-5043, 073.C-0525, 274.C-5015, 075.C-0355, 080.C-0615, 280.C-5053, 086.C-0958, and 087.C-0929. [less ▲]

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See detailForbidden transitions in Fe II
Quinet, Pascal ULg; Le Dourneu, M; Zeippen, C J

in Proceedings of the 5th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas (1996)

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See detailForbidden transitions of Astrophysical Interest in the 5pk (k=1-5) Configurations
Biémont, Emile ULg; Hansen, J. E.; Quinet, Pascal ULg et al

in Astronomy and Astrophysics. Supplement Series (1995), 111

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See detailForbidding Bodies: Avatars of the Phisical in the Work of Janet Frame
Delrez, Marc ULg

Conference (2002, April 23)

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See detailForbidding Bodies: Avatars of the Physical in the Work of Janet Frame
Delrez, Marc ULg

in World Literature Written in English (2004), 38(2), 70-79

The human body is hardly presented as a site of desire in the work of Janet Frame, who sees it first of all as an index of decrepitude and destruction and as a reminder of mortality. In the context of the ... [more ▼]

The human body is hardly presented as a site of desire in the work of Janet Frame, who sees it first of all as an index of decrepitude and destruction and as a reminder of mortality. In the context of the social realist criticism often brought to bear on the novels, Frame's disintegrating body has also been metaphorized as indicative of her obsession with the decay of a culture lacking the resources to regenerate itself. However, it can be argued that a more positive (utopian) drive operates within the work, so that the fading body derives an unexpected significance by virtue of its being in touch with eclipsed dimensions clamouring for ontological and epistemological reclamation. [less ▲]

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See detailLa force des mots. Mémoire et Shoah au XXIe siècle
Grandjean, Geoffrey ULg

Conference given outside the academic context (2017)

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See detailLa force du mi-dit : Figures de style dans le roman de Lawrence Scott, Witchbroom
Pagnoulle, Christine ULg

in Palimpsestes (2005), 16

Beyond some obvious comparisons, the article traces the function of some embedded metaphors, and the kind of problem they may raise in a translation.

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See detailForce feedback linearization for higher-order electromechanical sigma--delta modulators
Dong, Yufeng; Kraft, Michael ULg; Redman-White, William

in Journal of Micromechanics and Microengineering (2006), 16(6), 54-60

A higher-order electromechanical sigma–delta modulator can greatly improve the signal-to-noise ratio compared with a second-order loop that only uses the sensing element as a loop filter. However, the ... [more ▼]

A higher-order electromechanical sigma–delta modulator can greatly improve the signal-to-noise ratio compared with a second-order loop that only uses the sensing element as a loop filter. However, the electrostatic force feedback on the proof mass is inherently nonlinear, which will produce harmonics in the output spectrum and limits the total signal-to-noise and distortion ratio. High performance inertial sensors, which use sigma–delta modulators as a closed-loop control system, have strict requirements on the output signal distortion. In this paper, nonlinear effects from the force feedback and pick-off circuits are analysed and a strategy for force feedback linearization is put forward which can considerably improve the signal-to-noise and distortion ratio. A PCB prototype of a fifth-order electromechanical modulator with a bulk micromachined accelerometer was used to demonstrate the concept. [less ▲]

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See detailForce feedback linearization for higher-order electromechanical sigma--delta modulators
Dong, Yufeng; Kraft, Michaël ULg; Redman-White, William

in 16th European Workshop on Micromechanics. [MME 2005] (2005, September)

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See detailForce Limiting at CSL premises
Grodent, Christophe ULg; Cucchiaro, Antonio ULg; ronchain, philippe

(2001, June)

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See detailForce measurements reveal how small binders perturb the dissociation mechanisms of DNA duplex sequences
Burmistrova, Anastasia; Fresch, Barbara ULg; Sluysmans, Damien ULg et al

in Nanoscale (2016), 8

The force-driven separation of double-stranded DNA is crucial to the accomplishment of cellular pro- cesses like genome transactions. Ligands binding to short DNA sequences can have a local stabilizing or ... [more ▼]

The force-driven separation of double-stranded DNA is crucial to the accomplishment of cellular pro- cesses like genome transactions. Ligands binding to short DNA sequences can have a local stabilizing or destabilizing effect and thus severely affect these processes. Although the design of ligands that bind to specific sequences is a field of intense research with promising biomedical applications, so far, their effect on the force-induced strand separation has remained elusive. Here, by means of AFM-based single mole- cule force spectroscopy, we show the co-existence of two different mechanisms for the separation of a short DNA duplex and demonstrate how they are perturbed by small binders. With the support of Mole- cular Dynamics simulations, we evidence that above a critical pulling rate one of the dissociation pathways becomes dominant, with a dramatic effect on the rupture forces. Around the critical threshold, we observe a drop of the most probable rupture forces for ligand-stabilized duplexes. Our results offer a deep understanding of how a stable DNA–ligand complex behaves under force-driven strand separation [less ▲]

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See detailForce musculaire isocinétique du couple quadriceps / ischio-jambiers des joueurs de rugby professionnels
Julia, Marc; Pereira, B.; Morand, D. et al

in Résumés des communications orales SFTS (2012, October)

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See detailLa force persuasive de l'Idéo-graphie
Leclercq, Bruno ULg

Conference (2010, April 17)

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See detailForce plate : Gold standard ?
Balligand, Marc ULg

in Proceedings of the 20th ECVS Congress (2011)

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See detail- La force probante de la preuve irrégulièrement recueillie : Antigone aurait-elle perdu son âme ?
Jacobs, Ann ULg

in Saint-Pau, Jean Christophe; Bergeaud, Aurélie (Eds.) La preuve pénale – Problèmes contemporains en droit comparé (2012)

Jurisprudence belge en matière de preuve illégale et irrégulière.

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See detailA force sensor based on three weakly coupled resonators with ultrahigh sensitivity
Zhao, Chun; Wood, Graham; Xie, J.B. et al

in Sensors and Actuators. A, Physical (2015), 232

A proof-of-concept force sensor based on three degree-of-freedom (DoF) weakly coupled resonatorswas fabricated using a silicon-on-insulator (SOI) process and electrically tested in 20 Torr vacuum.Compared ... [more ▼]

A proof-of-concept force sensor based on three degree-of-freedom (DoF) weakly coupled resonatorswas fabricated using a silicon-on-insulator (SOI) process and electrically tested in 20 Torr vacuum.Compared to the conventional single resonator force sensor with frequency shift as output, by measuringthe amplitude ratio of two of the three resonators, the measured force sensitivity of the 3DoF sensor was4.9 × 106/N, which was improved by two orders magnitude. A bias stiffness perturbation was applied toavoid mode aliasing effect and improve the linearity of the sensor. The noise floor of the amplitude ratiooutput of the sensor was theoretically analyzed for the first time, using the transfer function model ofthe 3DoF weakly coupled resonator system. It was shown based on measurement results that the outputnoise was mainly due to the thermal–electrical noise of the interface electronics. The output noise spectraldensity was measured, and agreed well with theoretical estimations. The noise floor of the force sensoroutput was estimated to be approximately 1.39nN for an assumed 10 Hz bandwidth of the output signal,resulting in a dynamic range of 74.8 dB. [less ▲]

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