Le Code Switching

afin de pouvoir éventuellement agir suffisamment tôt pour éviter l’apparition de nuisances. Les mesures disponibles étaient soit numériques (pH etc.), soit des observations (couleur de l’eau etc.). Les variables qualitatives (au nombre de 33) ont été codées suivant les valeurs ordinales des paramètres (faible, moyen, élevé etc.). Les principales relations entre les différentes variables ont été définies sous forme de chaînes de causalité (par exemple : [activité photosynthétique élevée] ==> [CO2 bas]

convinced that Aurora meant it this time, but as the date of the wedding approached, he still hadn't received an invitation from her—nor a letter, nor a telephone message, nor a word of any kind. When he called the number with the Philadelphia area code she had scribbled onto a paper napkin for him during lunch, a mechan- THE BROOKLYN FOLLIES 79 ical voice announced that the number was no longer in service. He then tried to track her down through local information, but of the three David

central nervous system. J Gen Virol 2001;82:1043-7. 14. Badrane H, Bahloul C, Perrin P, Tordo N. Evidence of two Lyssavirus phylogroups with distinct pathogenicity and immunogenicity. J Virol 2001;75:3268-76. 15. Badrane H, Tordo N. Host switching in Lyssavirus history from the Chiroptera to the Carnivora orders. J Virol 2001;75:8096-104. 16. Bagot S, Idrissa BM, Campino S, et al. Susceptibility to experimental cerebral malaria induced by Plasmodium berghei ANKA in inbred mouse strains

& Production Management, Vol. 21, No.1/2, 71 87. Hadavi, K. C. (1998) Supply Chain Planning Integration: Design Consideration or Afterthought? APS Magazine 2, MFG Publishing, Inc., Beverly, Massachusetts. Hakimi, S. L. (1964) Optimum location of switching centres and the absolute centres and medians of a graph, Operation Research, No. 12, 450 459. Handfield, R. B.; Nichols, E. L. J. R. (1999) Introduction to Supply Chain Management, Ed. Prentice Hall, New Jersey. Hansen, P. H.; Hegedahl, B.; Hjortkjaer