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See detailEtude des résidus de régression : principes et application
Palm, Rodolphe ULg

in Notes de Statistique et d'Informatique (1986), 1

The main methods of analysis of regression residuals, based on both graphical techniques and parameters calculation, are given. A general computer for the analysis of residuals is presented and an example ... [more ▼]

The main methods of analysis of regression residuals, based on both graphical techniques and parameters calculation, are given. A general computer for the analysis of residuals is presented and an example of its use is discussed. [less ▲]

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See detailÉtude des risques liés aux pratiques d’élevage sur la santé mammaire des exploitations laitières en Wallonie
Theron, Léonard ULg

Master of advanced studies dissertation (2008)

As most of production pathologies in dairy farming, mastitis is characterized by a multifactorial aetiology. Its diagnosis and treatment requires a good knowledge of its determinant and predisposing ... [more ▼]

As most of production pathologies in dairy farming, mastitis is characterized by a multifactorial aetiology. Its diagnosis and treatment requires a good knowledge of its determinant and predisposing factors. The comparative epidemiology of 349 walloon farms registered to individual milk analysis programs led to highlight the practices used in farms whose last 3 months' herd somatic cell count was above 400.000 cells/ml. We identified the following risk indicators relative to 1) herd demography : age, composition, herd production average, percentage of high cell counts animals 2) the animal housing : use of straw as bedding stall for all classes of animals and lack of a calving pen 3) the milking machine : milking cups cleaning 4) the dairy practices : lack of washing cloth towels between 2 milkings, occasional foremilk check, stripping, lack of post-dip and 5) animal nutrition : mould on beet pulp silos, adding salt in the diet and composition of the main concentrate. This descriptivre and univariate analysis confirmed the risky situation of a large majority of dairy farms regarding the recommendations of good dairy practices guides. [less ▲]

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See detailL'étude des sémiochimiques. Applications en écologie chimique
Heuskin, Stéphanie ULg

Scientific conference (2013, November 21)

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See detailEtude des séries chronologiques par la méthode de Box et Jenkins
Palm, Rodolphe ULg

in Notes de Statistique et d'Informatique (1987), 2

This note briefly describes the BOX-JENKINS methodology for time series analysis. The method is illustrated by an example analyzed with the Minitab software.

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See detailEtude des séries chronologiques par les méthodes de décomposition
Palm, Rodolphe ULg

in Notes de Statistique et d'Informatique (1987), (1), 25

This note briefly describes the main methods of analyzing time series by a decomposition into a trend, a seasonal variation, and residuals. The methods are illustrated by an example analyzed with the ... [more ▼]

This note briefly describes the main methods of analyzing time series by a decomposition into a trend, a seasonal variation, and residuals. The methods are illustrated by an example analyzed with the Minitab sofware. [less ▲]

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See detailEtude des séries chronologiques par les méthodes de décomposition
Palm, Rodolphe ULg; Brostaux, Yves ULg

in Notes de Statistique et d'Informatique (2009), (1), 1-17

This note briefly describes the main methods of analysing time series by a decomposition into a trend, a seasonal variation, and residuals. The methods are illustrated by an example analysed with Minitab ... [more ▼]

This note briefly describes the main methods of analysing time series by a decomposition into a trend, a seasonal variation, and residuals. The methods are illustrated by an example analysed with Minitab software. [less ▲]

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See detailEtude des séries chronologiques par les méthodes de lissage
Palm, Rodolphe ULg

in Notes de Statistique et d'Informatique (2007), (1), 1-22

This note briefly describes forecasting procedures for time series based on smoothing techniques. The following procedures are examined : exponential smoothing for non-seasonal time series showing no ... [more ▼]

This note briefly describes forecasting procedures for time series based on smoothing techniques. The following procedures are examined : exponential smoothing for non-seasonal time series showing no trend, Holt procedure for non-seasonal time series with trend and Holt-Winters procedure for time series containing trend and seasonal variation. The methods are illustrated by an example processed with Minitab software. [less ▲]

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Peer Reviewed
See detailEtude des sollicitations et des mouvements tourbillonnaires autour des colonnes d'une plate forme océanique sous l'action de courants alternés
Marchal, Jean ULg; Lejeune, A.; Davister, G.

in Bulletin de l'Association Technique Maritime et Aéronautique (1978)

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See detailEtude des structures élastiques anisotropes pouvant être incompressibles et application à un élément fini de tore triangulaire
Debongnie, Jean-François ULg

Report (1975)

This paper presents the extension of herrmann's formulation to all cases, isotropic or not, where the local flexibility matrix presents at most one singularity, that is an isotropic pressure. Starting ... [more ▼]

This paper presents the extension of herrmann's formulation to all cases, isotropic or not, where the local flexibility matrix presents at most one singularity, that is an isotropic pressure. Starting from Reissner's principle, a matrix is introduced, which behaves as the inverse of the flexibility matrix for any deviatoric stress. This matrix may be obtained in a full-automatic scheme. Then, a triangular tor element is developped from this formulation. Finally, tests are presented. [less ▲]

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See detailEtude des sulfonylurées en traitement de postémergence au printemps en culture d'escourgeon.
Bodson, Bernard ULg; Salembier, Jean-François; Gomand, Michel

in Mededelingen van de Faculteit Landbouwwetenschappen (Rijksuniversiteit te Gent) (1991, May 07), 56(3a), 719-726

Durant 2 années d'essais 1989 et 1990 les sulfonylurées les plus couramment utilisées en froment d'hiver ont été comparées dans la culture d'escourgeon en traitement de postémergence au printemps.La ... [more ▼]

Durant 2 années d'essais 1989 et 1990 les sulfonylurées les plus couramment utilisées en froment d'hiver ont été comparées dans la culture d'escourgeon en traitement de postémergence au printemps.La sélectivité des produits seuls et de quelques associations de ces matières actives entre elles a été étudiée avec les produits appliqués seuls ou en mélange avec de l'isoproturon. Par rapport au metsulfuron-méthyl, au tribenuron-méthyl et au triasulfuron, le thifensulfuron-méthyl seul ou associé au métsulfuron-méthyl ou au tribenuron-méthyl a montré un manque de sélectivité. [less ▲]

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See detailL'etude des taxocenoses de carabides (Coleoptera) dans un parc periurbain (Parc Tournay-Solvay a Boitsfort)
Janssens, B.; Dufrêne, Marc ULg

in Annales - Societe Royale Zoologique de Belgique (1988), 118

Emphasises the important role of substratum humidity in spatial distribution of species and in population. The open biotope also provides an explanatory factor. -from English summary

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See detailEtude des variables spirométriques et des mesures morphométriques des veaux croisés Blanc-Bleu Belge x Holsteins pie noire
Jacqmot, Olivier ULg; Michaux, Charles ULg; Borceux, Ph et al

in Annales de Médecine Vétérinaire (2004), 148(1), 39-46

The bovine species is highly susceptible to respiratory dis-eases. A previous experiment has shown that Belgian Blue and White calves have lower spiro-metric variables than Holstein calves. The first aim ... [more ▼]

The bovine species is highly susceptible to respiratory dis-eases. A previous experiment has shown that Belgian Blue and White calves have lower spiro-metric variables than Holstein calves. The first aim of this study was to measure the spirometric variables (peak inspiratory flow, peak expiratory flow, maximal tidal volume, maximal ventilation in 15 seconds and ventilatory reserve) of 18 crossed Belgian Blue x Holstein calves and of 32 Dual purpose calves by the lobelin test and to compare them with 19 Holstein calves and 22 Belgian Blue and White calves. The second aim was to test the correlation between some mor-phometrical parameters (chest girth, thoracic width, thoracic length, thoracic height, thoracic section and costal angle) and those spirometric variables. The spirometric variables of the crossed calves and of the Dual purpose calves are situated between the ones of the Belgian Blue and White and of the Holstein. There is a positive sig-nificant correlation between these parameters and the spirometric variables. The higher cor-relation is obtained with the chest girth. All these parameters are easier and quicker measura-ble, and at lower cost than the spirometric variables [less ▲]

Detailed reference viewed: 81 (25 ULg)