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  • Cambridge University Press (CUP)  (22)
  • 1
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 1970
    In:  Transactions of the International Astronomical Union Vol. 14, No. 1 ( 1970), p. 177-185
    In: Transactions of the International Astronomical Union, Cambridge University Press (CUP), Vol. 14, No. 1 ( 1970), p. 177-185
    Abstract: La commission déplore le décès de Madame Aksentieva, directeur de l’Observatoire de Poltava et du Professeur Demetrescu, ancien directeur de l’Observatoire de Bucarest. L’étude de la rotation de la Terre poursuit plusieurs objectifs scientifiques fondamentaux: (1) Fournir des données d’observations continues d’où l’on pourra tirer un ensemble de paramètres servant de base à l’élaboration des théories sur la constitution interne de la Terre et sur la dynamique du système Terre-Lune. (2) Fournir à tout moment la position d’un trièdre de référence attaché au manteau terrestre par rapport à un trièdre fixé dans l’espace, travail d’une nécessité primordiale pour l’astronomie fondamentale, la géodésie et la navigation spatiale. (3) Permettre de nouvelles recherches sur certaines constantes fondamentales de l’astronomie (nutation, aberration) grâce à la constitution de très longues séries d’observations homogènes.
    Type of Medium: Online Resource
    ISSN: 0251-107X
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1970
    SSG: 16,12
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  • 2
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 1975
    In:  International Astronomical Union Colloquium Vol. 26 ( 1975), p. 409-413
    In: International Astronomical Union Colloquium, Cambridge University Press (CUP), Vol. 26 ( 1975), p. 409-413
    Abstract: The ideas I shall try to develop are probably not original but I hope they reflect a general opinion of those who have looked into the problem of the Earth’s rotation. We must examine here related points: 1. The polar motion and the variation of UT1. 2. The system of reference with respect to which these periodic or secular variations are described.
    Type of Medium: Online Resource
    ISSN: 0252-9211
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1975
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  • 3
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 2000
    In:  International Astronomical Union Colloquium Vol. 178 ( 2000), p. 41-66
    In: International Astronomical Union Colloquium, Cambridge University Press (CUP), Vol. 178 ( 2000), p. 41-66
    Abstract: The discovery by Seth C. Chandler (1891) that the motion of the pole (the reality of which had been established by K.F. Küstner and by the simultaneous latitude observations at Honolulu and Berlin by German astronomers) resulted from two components i.e. a free circular motion with a period of 427 days and a forced elliptical motion with a period of 365.25 days, raised considerable interest in the scientific community of astronomers and geophysicists. The celebrated Mécanique Céleste of Tisserand (1890) had been published just one year before at a time when doubts still persisted and arguments could be presented in favor of the fixed pole. Starting with Tisserand’s arguments, we describe in this paper the impact of the successive contributions by A. Greenhill, S. Newcomb, Th. Sloudsky, S. Hough, G. Herglotz, A. Love, J. Larmor and H. Poincaré to the solution of the problems raised by the Chandler period. The lines of reasoning taken by these eminent scientists were rigorously correct so that, after about one hundred years, contemporary researchers, who benefit from a far better knowledge of the inner structure of the Earth and are able to take advantage of modern computing power, do not contradict any of their conclusions and instead refine them with an accuracy which was not imaginable one century ago.
    Type of Medium: Online Resource
    ISSN: 0252-9211
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2000
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  • 4
    In: Annals of Glaciology, Cambridge University Press (CUP), Vol. 59, No. 76pt1 ( 2018-07), p. 29-41
    Abstract: West Antarctic climate and surface mass balance (SMB) records are sparse. To fill this gap, regional atmospheric climate modelling is useful, providing that such models are employed at sufficiently high horizontal resolution and coupled with a snow model. Here we present the results of a high-resolution (5.5 km) regional atmospheric climate model (RACMO2) simulation of coastal West Antarctica for the period 1979–2015. We evaluate the results with available in situ weather observations, remote-sensing estimates of surface melt, and SMB estimates derived from radar and firn cores. Moreover, results are compared with those from a lower-resolution version, to assess the added value of the resolution. The high-resolution model resolves small-scale climate variability invoked by topography, such as the relatively warm conditions over ice-shelf grounding zones, and local wind speed accelerations. Surface melt and SMB are well reproduced by RACMO2. This dataset will prove useful for picking ice core locations, converting elevation changes to mass changes, for driving ocean, ice-sheet and coupled models, and for attributing changes in the West Antarctic Ice Sheet and shelves to changes in atmospheric forcing.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2018
    detail.hit.zdb_id: 2122400-6
    SSG: 14
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  • 5
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 1961
    In:  Symposium - International Astronomical Union Vol. 13 ( 1961), p. 5-6
    In: Symposium - International Astronomical Union, Cambridge University Press (CUP), Vol. 13 ( 1961), p. 5-6
    Abstract: Le Service International des Latitudes a été fondé par l'Association Internationale de Géodésie en 1899. Sa structure n'a pas subi de modification essentielle depuis soixante années de fonctionnement ininterrompu. Rien d'étonnant donc à ce qu'une réforme soit maintenant à l'ordre du jour. La question préoccupe à vrai dire les astronomes et les géophysiciens depuis quelques années et, si plusieurs stations ont modernisé leur équipement instrumental vers les années 1930–35, il n'en reste pas moins que l'on pourrait profiter à présent de nouveaux perfectionnements techniques dans les stations ou même y introduire des méthodes de travail nouvelles. Parallèlement le Bureau Central qui est chargé des calculs devrait être rendu plus efficace et plus rapide par l'emploi de moyens de calcul puissants qui sont aujourd'hui partout accessibles en raison de la multiplication des ordinateurs dans le monde scientifique et industriel. Cette mesure est rendue plus nécessaire encore en raison de l'augmentation du nombre de stations et aussi du légitime désir des astronomes d'essayer simultanément plusieurs procédés de calcul sur le même matériel d'observations.
    Type of Medium: Online Resource
    ISSN: 0074-1809
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1961
    SSG: 16,12
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  • 6
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 1976
    In:  Transactions of the International Astronomical Union Vol. 16, No. 1 ( 1976), p. 159-173
    In: Transactions of the International Astronomical Union, Cambridge University Press (CUP), Vol. 16, No. 1 ( 1976), p. 159-173
    Type of Medium: Online Resource
    ISSN: 0251-107X
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1976
    SSG: 16,12
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  • 7
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 66, No. 256 ( 2020-04), p. 291-302
    Abstract: Surface melt on the coastal Antarctic ice sheet (AIS) determines the viability of its ice shelves and the stability of the grounded ice sheet, but very few in situ melt rate estimates exist to date. Here we present a benchmark dataset of in situ surface melt rates and energy balance from nine sites in the eastern Antarctic Peninsula (AP) and coastal Dronning Maud Land (DML), East Antarctica, seven of which are located on AIS ice shelves. Meteorological time series from eight automatic and one staffed weather station (Neumayer), ranging in length from 15 months to almost 24 years, serve as input for an energy-balance model to obtain consistent surface melt rates and energy-balance results. We find that surface melt rates exhibit large temporal, spatial and process variability. Intermittent summer melt in coastal DML is primarily driven by absorption of shortwave radiation, while non-summer melt events in the eastern AP occur during föhn events that force a large downward directed turbulent flux of sensible heat. We use the in situ surface melt rate dataset to evaluate melt rates from the regional atmospheric climate model RACMO2 and validate a melt product from the QuikSCAT satellite.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2020
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 8
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 1980
    In:  Symposium - International Astronomical Union Vol. 78 ( 1980), p. 17-21
    In: Symposium - International Astronomical Union, Cambridge University Press (CUP), Vol. 78 ( 1980), p. 17-21
    Abstract: The useless introduction of the new words “wobble” and “sway” has produced a flourishing rise in confusing terminology in most of the recent papers. These two words even if picturesque are fundamentally unprecise. They perhaps help to describe – in the English language – the nature of the movement but in no way correspond to the classical terminology of fundamental mechanics. They have apparently no convenient translation into the other usual languages.
    Type of Medium: Online Resource
    ISSN: 0074-1809
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1980
    SSG: 16,12
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  • 9
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 1961
    In:  Symposium - International Astronomical Union Vol. 13 ( 1961), p. 87-90
    In: Symposium - International Astronomical Union, Cambridge University Press (CUP), Vol. 13 ( 1961), p. 87-90
    Abstract: Dans la communication de N. Stoyko , on est frappé par la moindre précision de la coordonnée Y. Celà montre qu'on ne peut trop insister sur la question d'une bonne distribution en longitude. Cette moindre précision a d'ailleurs toujours été notoire mais nous avions trouvé (1954) pour Y (S. I. L.) un écart moyen maximum de 0″019. Il nous semble que la valeur de 0″024 donnée ici est un peu trop forte.
    Type of Medium: Online Resource
    ISSN: 0074-1809
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1961
    SSG: 16,12
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  • 10
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 2016
    In:  European Psychiatry Vol. 38 ( 2016-10), p. 51-60
    In: European Psychiatry, Cambridge University Press (CUP), Vol. 38 ( 2016-10), p. 51-60
    Abstract: Children growing up in homeless families are disproportionately more likely to experience health and psychological problems. Our objective was to describe social, environmental, individual and family characteristics associated with emotional and behavioral difficulties among homeless children living in the Paris region. Methods Face-to-face interviews with a representative sample of homeless families were conducted by bilingual psychologists and interviewers between January and May 2013 ( n = 343 children ages 4-13 years). Mothers reported children’s emotional and behavioral difficulties (Strength and Difficulties Questionnaire [SDQ]), family socio-demographic characteristics, residential mobility, and parents’ and children’s physical and mental health. Children were interviewed regarding their perception of their living arrangements, friendships and school experiences. We studied children’s SDQ total score in a linear regression framework. Results Homeless children had higher SDQ total scores than children in the general population of France, (mean total score = 11.3 vs 8.9, P 〈 0,001). In multivariate analyses, children’s difficulties were associated with parents’ region of birth (beta = 1.74 for Sub-Saharan Africa, beta = 0.60 for Eastern Europe, beta = 3.22 for other countries, P = 0.020), residential mobility (beta = 0.22, P = 0.012), children’s health (beta = 3.49, P 〈 0.001) and overweight (beta = 2.14, P = 0.007), the child’s sleeping habits (beta = 2.82, P = 0.002), the mother’s suicide risk (beta = 4.13, P 〈 0.001), the child’s dislike of the family’s accommodation (beta = 3.59, P 〈 0.001) and the child’s experience of bullying (beta = 3.21, P = 0.002). Conclusions Children growing up homeless experience high levels of psychological difficulties which can put them at risk for poor mental health and educational outcomes long-term. Access to appropriate screening and medical care for this vulnerable yet underserved group are greatly needed.
    Type of Medium: Online Resource
    ISSN: 0924-9338 , 1778-3585
    RVK:
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2016
    detail.hit.zdb_id: 2005377-0
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