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Peer Reviewed
See detailPériode de HR 8861
Renson, Pierre ULg

in Bulletin de la Société Royale des Sciences de Liège (1965), 34

Not Available

Detailed reference viewed: 12 (0 ULg)
Peer Reviewed
See detailLa période de HR 8861 = ET And
Renson, Pierre ULg

in Astronomy and Astrophysics (1977), 54

Abstract image available at: http://adsabs.harvard.edu/abs/1977A&A....54..277R

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailPériode de l'étoile Ap à grande variation photométrique GC 17353
Renson, Pierre ULg

in Astronomy and Astrophysics (1978), 69

Abstract image available at: http://adsabs.harvard.edu/abs/1978A&A....69..351R

Detailed reference viewed: 6 (1 ULg)
Full Text
See detailLa période de tarissement chez la vache laitière
Beckers, Yves ULg

Conference given outside the academic context (2010)

Présentation des éléments historiques et actuels intervenant dans le choix de la durée des périodes tarissement et de lactation chez la vache laitière. Informations sur l'usage de rations acidifiantes en ... [more ▼]

Présentation des éléments historiques et actuels intervenant dans le choix de la durée des périodes tarissement et de lactation chez la vache laitière. Informations sur l'usage de rations acidifiantes en prévention de l'hypocalcémie de lait. [less ▲]

Detailed reference viewed: 311 (16 ULg)
See detailLa période Halaf
Tunca, Önhan ULg; Molist, M.

Book (2004)

Detailed reference viewed: 31 (3 ULg)
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Peer Reviewed
See detailPériode photométriqe de l'étoile Ap HR 3831
Renson, Pierre ULg; Manfroid, Jean ULg; Heck, A. et al

in Astronomy and Astrophysics (1984), 131

From 32 observations made in February 1977, in the uvby system, a photometric period P = 1.428 + or - 0.005 day was previously found for the A7p SrCrEu star HR 3831 = HD 83368. A series of 26 measurements ... [more ▼]

From 32 observations made in February 1977, in the uvby system, a photometric period P = 1.428 + or - 0.005 day was previously found for the A7p SrCrEu star HR 3831 = HD 83368. A series of 26 measurements in December 1975, a few measurements in December 1978, both also in the Stromgren system, and the measurements recently published by Kurtz (1982) in B and V (Johnson system) improve the precision on P. The value obtained is P = 1.42602 + or - 0.00006 day. The photometric variations with this period are displayed. As found previously, a null-wavelength appears in the blue. Kurtz's suggestion that the photometric period is equal to twice the value above does not seem to be justified; however, other considerations favor a rotation period equal to twice the photometric one. [less ▲]

Detailed reference viewed: 15 (6 ULg)
See detailLes périodes du Paléolithique supérieur
Flas, Damien ULg

in Toussaint, Michel; Pirson, Stéphane (Eds.) Le patrimoine archéologique de Wallonie. Les chasseurs-cueilleurs du Paléolithique et du Mésolithique (2014)

Detailed reference viewed: 9 (0 ULg)
See detailPeriodic bursts of non-Io DAM and its relationship to Jovian aurora phenomena
Rucker, H.; Panchenko, M.; Grodent, Denis ULg et al

Poster (2011)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailPeriodic Comet d'Arrest (1976e)
Jekabsons, C.; Jekabsons, P.; Candy, M. P. et al

in International Astronomical Union Circulars [=IAUCs] (1976), 2990

IAUC 2990 available at Central Bureau for Astronomical Telegrams.

Detailed reference viewed: 12 (2 ULg)
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Peer Reviewed
See detailPeriodic Comet d'Arrest (1976e)
Debehogne, H.; Surdej, Jean ULg; Surdej, Anna ULg et al

in International Astronomical Union Circulars [=IAUCs] (1976), 3010

IAUC 3010 available at Central Bureau for Astronomical Telegrams.

Detailed reference viewed: 15 (5 ULg)
Full Text
Peer Reviewed
See detailPeriodic leg movements during sleep and wakefulness in narcolepsy.
Dauvilliers, Yves; Pennestri, Marie-Helene; Petit, Dominique ULg et al

in Journal of Sleep Research (2007), 16(3), 333-9

The objectives of the study were to measure the prevalence of periodic leg movements during NREM and REM sleep (PLMS) and while awake (PLMW) and to assess the impact of PLMS on nocturnal sleep and daytime ... [more ▼]

The objectives of the study were to measure the prevalence of periodic leg movements during NREM and REM sleep (PLMS) and while awake (PLMW) and to assess the impact of PLMS on nocturnal sleep and daytime functioning in patients with narcolepsy. One hundred and sixty-nine patients with narcolepsy and 116 normal controls matched for age and gender were included. Narcoleptics with high and low PLMS indices were compared to assess the impact of PLMS on sleep and Multiple Sleep Latency Test (MSLT) variables. More narcoleptics than controls had a PLMS index greater than 5 per hour of sleep (67% versus 37%) and an index greater than 10 (53% versus 21%). PLMS indices were higher both in NREM and REM sleep in narcoleptic patients, but the between-group difference was greater for REM sleep. A significant increase of PLMS index was also found with aging in both narcoleptic patients and controls. PLMW indices were also significantly higher in narcoleptic patients. Patients with an elevated index of PLMS had a higher percentage of stage 1 sleep, a lower percentage of REM sleep, a lower REM efficiency and a shorter MSLT latency. The present study demonstrates a high frequency of PLMS and PLMW in narcolepsy, an association between the presence of PLMS and measures of REM sleep and daytime functioning disruption. These results suggest that PLMS represent an intrinsic feature of narcolepsy. [less ▲]

Detailed reference viewed: 5 (1 ULg)
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Peer Reviewed
See detailPeriodic mass-loss episodes due to an oscillation mode with variable amplitude in the hot supergiant HD 50064
Aerts, C.; Lefever, K.; Baglin, A. et al

in Astronomy and Astrophysics (2010), 513

<BR /> Aims: We aim to interpret the photometric and spectroscopic variability of the luminous blue variable supergiant HD 50064 (V = 8.21). <BR /> Methods: CoRoT space photometry and follow-up high ... [more ▼]

<BR /> Aims: We aim to interpret the photometric and spectroscopic variability of the luminous blue variable supergiant HD 50064 (V = 8.21). <BR /> Methods: CoRoT space photometry and follow-up high-resolution spectroscopy with a time base of 137 d and 169 d, respectively, was gathered, analysed, and interpreted using standard time series analysis and light curve modelling methods, as well as spectral line diagnostics. <BR /> Results: The space photometry reveals one period of 37 d, which undergoes a sudden amplitude change with a factor 1.6. The pulsation period is confirmed in the spectroscopy, which additionally reveals metal line radial velocity values differing by 30 km s[SUP]-1[/SUP] depending on the spectral line and on the epoch. We estimate T[SUB]eff[/SUB] 13 500 K, log g 1.5 from the equivalent width of Si lines. The Balmer lines reveal that the star undergoes episodes of changing mass loss on a time scale similar to the changes in the photometric and spectroscopic variability, with an average value of log dot{M} â -5 (in M_ȯ yr[SUP]-1[/SUP]). We tentatively interpret the 37 d period as the result of a strange mode oscillation. Based on high-resolution spectroscopy assembled with the CORALIE spectrograph attached to the 1.2 m Euler telescope at La Silla, Chile and on CoRoT space-based photometry. The CoRoT space mission was developed and is operated by the French space agency CNES, with the participation of ESA's RSSD and Science Programmes, Austria, Belgium, Brazil, Germany, and Spain.Postdoctoral Fellow of the Fund for Scientific Research of Flanders (FWO), Belgium. [less ▲]

Detailed reference viewed: 10 (3 ULg)
Peer Reviewed
See detailPeriodicité d'etoiles Ap australes
Renson, Pierre ULg

in Information Bulletin on Variable Stars (1977), 1280

Not Available

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailPériodicité de HD 10783
Renson, Pierre ULg

in Bulletin de la Société Royale des Sciences de Liège (1965), 34

The radial velocity of the magnetic star HD 10783 is shown (fig.2) to vary with the period of the luminosity and magnetic variations. The plot of the magnetic field intensity as a function of the phase ... [more ▼]

The radial velocity of the magnetic star HD 10783 is shown (fig.2) to vary with the period of the luminosity and magnetic variations. The plot of the magnetic field intensity as a function of the phase (fig.1) gives an asymmetrical curve, which, except for the sign, resembles the luminosity curve, as in other periodic magnetic variables; but the coincidence of the phases remains doubtful. The velocity varies much more rapidly just before the sharper extremum of the magnetic field. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailPériodicité de la Variable Spectrale omega Oph
Renson, Pierre ULg; Maitzen, H. M.

in Astronomy and Astrophysics (1978), 65

Abstract image available at: http://adsabs.harvard.edu/abs/1978A&A....65..299R

Detailed reference viewed: 4 (0 ULg)
Full Text
See detailPériodicité semi-diurne des mouvements apparents d'un pendule libre dans le premier vertical
Folie, François ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1904), 12

The author answers to an objection about the diurnal nutation by applying a criterion to his pendulum observations made from 13 to 16 August 1904.

Detailed reference viewed: 2 (1 ULg)
Peer Reviewed
See detailPériodicités probables des étoiles Ap xi Phe et HD 30849
Renson, Pierre ULg

in Astronomy and Astrophysics (1979), 77

A few photometric observations made by Vogt and Faundez (1979) for xi Phe and HD 30849 allow to deduce that the variations are probably periodic. The most probable periods are given. These variations are ... [more ▼]

A few photometric observations made by Vogt and Faundez (1979) for xi Phe and HD 30849 allow to deduce that the variations are probably periodic. The most probable periods are given. These variations are large for Ap stars, chiefly in HD 30849, and mainly in v. [less ▲]

Detailed reference viewed: 13 (2 ULg)
Peer Reviewed
See detailLes périodiques juridiques au Congo belge
Braillon, Charlotte ULg

Conference (2011, May 13)

Detailed reference viewed: 12 (2 ULg)
Peer Reviewed
See detailPeriodontal condition in Belgian patients with acute or chronic heart disease
Geerts, Sabine ULg; Charpentier, Joseph; Albert, Adelin ULg et al

Poster (2001)

Detailed reference viewed: 5 (2 ULg)