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THIS STUDY EVALUATES THE IMPACT OF COMPETITION AND RETURNS TO SCALE IN THE DETERMINATION OF INTO PLANE RATES. DUE TO THE LACK OF PUBLIC INFORMATION ON THESE RATES, WE COMPILED A DATABASE FOR 32 AIRPORTS IN THE UNITED STATES BY…

BASED UPON THE STATISTICAL DATA BANK, THE CURRENT STATE OF THE ACTIVITY OF THE PUBLIC LIBRARIES IS PRESENTED, AS WEB AS THE LEVEL OF DEVELOPMENT ACHIEVED BY THESE INSTITUTIONS. THE POSSIBILITIES OF APPLYING MATHEMATICAL MODELS TO THIS DATA IS THEN…

THE ARTICLE PRESENTS ASPECTS OF DATABASES DESIGN AND USE THAT MAKE US REFLECT ON THE BASIC ASPECTS THAT REALLY MAKE THEM AN USEFUL TOOL FOR INFORMATION RETRIEVAL. THE PAPER IS CONCERNED WITH THE INVOLVEMENT THAT EVERY DATABASE DESIGNER MUST HAVE…

RESEARCH ON INFORMATION RETRIEVAL BEHAVIOUR HAS SHOWN THAT IT IS A DYNAMIC AND ITERATIVE PROCESS WHICH IS ALSO AFFECTED BY FACTORS OF A SUBJECTIVE AND AFFECTIVE NATURE. RECOGNITION OF THESE FACTORS HAS BROUGHT ABOUT A NEW THEORETICAL MODEL OF INFORMATION…

In this work, the set of annual pluvial precipitation patterns obtained in 57 weather stations from the southern part of baja california peninsula (mexico) during more than 20 yeras is presented. Three distinctic periods are readily recognizable from the annual…