Period of the Si-star in NGC 2169

in Astronomy and Astrophysics (1994), 285

For the Si Ap-star known in NGC 2169 (Gr.9 in the cluster), a period between 0.60 and 0.62 d, most likely about 0.606 d, agrees with all known observations, and is much more probable than the period 1.56 ... [more ▼]

For the Si Ap-star known in NGC 2169 (Gr.9 in the cluster), a period between 0.60 and 0.62 d, most likely about 0.606 d, agrees with all known observations, and is much more probable than the period 1.56 d proposed by Maitzen & Lebzelter (1993). The obtained period is among the shortest ones known for Ap stars. [less ▲]

PERIOD3 genotype and light affect brain activation after sleep loss. Imaging the relevants of sleep for cognitive functions symposium.

Conference (2011, June)

A PERIOD3 polymorphism predicts fMRI assessed brain responses following sleep loss

in Sleep (2008), 31(Suppl. 1),

La période de HR 8861 = ET And

in Astronomy and Astrophysics (1977), 54

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

La période de tarissement chez la vache laitière

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 ▲]

Période photométriqe de l'étoile Ap HR 3831

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 ▲]

Periodic Comet d'Arrest (1976e)

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

IAUC 2990 available at Central Bureau for Astronomical Telegrams.

Periodic leg movements during sleep and wakefulness in narcolepsy.

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 ▲]

Periodicité d'etoiles Ap australes

in Information Bulletin on Variable Stars (1977), 1280

Not Available

Périodicité de la Variable Spectrale omega Oph

in Astronomy and Astrophysics (1978), 65

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