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Η επίδραση της σύγκλισης της ελληνικής οικονομίας στο ΕΜΙ στο χρηματιστήριο. BAYES δικτυωτός υπολογισμός της τάσης των μετοχών
No full textΦαινομενολογία και νοσηλευτική έρευνα
No full textΗ Φαινομενολογία ως μια μέθοδος έρευνας της ανθρώπινης ύπαρξης και ανάλυσης των εμπειριών του. Το κείμενο αυτό αναλύει τη μεθοδολογία της φαινομενολογικής προσέγγισης και τις δύο διαφορετικές σχολές που αναπτύχθηκαν: την περιγραφική (Husserlian) σχολή και την ερμηνευτική (Heideggerian) σχολή. Επίσης, γίνεται αναφορά στον τρόπο συγκέντρωσης και ανάλυσης των δεδομένων και τέλος γίνεται λόγος για τον ρόλο της φαινομενολογίας στη νοσηλευτική έρευνα και της σχέσης της με τη νοσηλευτική επιστήμη
Optimal portfolio from securities of the index FTSE/XAA20 of the Athens stock-exchange in the years 1997-1999
No full textΠερίληψη
Σε αυτή την εργασία υπολογίζεται ένα χαρτοφυλάκιο οκτώ μετοχών από τις είκοσι που μετέχουν στον δείκτη FTSE/ΧΑΑ20 του Χρηματιστηρίου Αθηνών για τα έτη 1997-1999. Το Χαρτοφυλάκιο είναι βέλτιστο με το κριτήριο του Roy ,της μέγιστης πιθανότητας να έχει απόδοση μεγαλύτερη από την βασική επένδυση χωρίς κίνδυνο (ρίσκο) δηλ την απλή κατάθεση σε τράπεζα ή την επένδυση σε γραμμάτια δημοσίου
Στοχαστική εκλέπτυνση του μοντέλου βέλτιστου πληθωρισμού του Pecorino
No full textABSTRACT
In this short paper with title “Stochastic refinement of the Pecorino’s Optimal
Inflation-Rate model ”, we extend the model of Pecorino to include stochastic
effects. The basic result is that under natural conditions the optimality of the model’s
inflation rate, remains, even if we refine it to a stochastic model. The stochastic
refinement has in addition a three-fold effect: a) It makes the model mathematically
more sophisticated and advanced b) It gives to it statistical and econometric
foundation; it is therefore related directly to empirical measurements. c) Many
different cases can be considered to follow the model (up to a probability of an error )
that in the previous deterministic formulation should be excluded. (JEL:E3,E4,C3
An insurance econometric assets valuation model, for the national Technical University of Athens.
No full textIn this paper we describe an econometric asset valuation model for the National Technical University of Athens. It was created in order to insure the buildings and scientific equipment .We make use of statistics and stochastic differential equations (geometric Brownian motion). It is described through tables the structure of the study , the buildings and the evolution of the assets of the Institution during the last twenty years, taking also into account the average rate of change of the value of money due to inflation and bank rates changes
Στοχαστική εκλέπτυνση ενός μοντέλου βέλτιστων επενδύσεων με κόστη προσαρμογής του Jorgensen-Kort .
No full textAbstract
In this short paper, we give exemplify how an established optimal control model in Economics may be extended to include stochastic effects. The extension and refinement has a three-fold effect: a) It makes the model mathematically more sophisticated and advanced b) It gives to it statistical and econometric foundation; it is therefore related directly to empirical measurements. c) Many different cases can be considered to follow the model (up to a probability of an error) that in the previous deterministic formulation should be excluded. We have chosen a relatively recent model by Jorgensen and Kort about optimal investment with adjustment costs
Ordinal Real Numbers 1. The ordinal characteristic.
No full textIn this paper are introduced the ordinal integers ,the ordinal rational numbers ,the ordinal real numbers ,the ordinal p-adic numbers ,the ordinal complex numbers and the ordinal quaternion numbers .It is also introduced the ordinal characteristic of linearly ordered fields. The final result of this series of papers shall be that the four different techniques of transfinite real numbers ,of non-standard enlargment fields of the real numbers ,of surreal numbers ,of ordinal real numbers give by inductive limit or union the same class of numbers known already as the class No and that would deserve the name the "infinitary totally ordered Newton-Leibniz realm of numbers "
Free algebrae and alternative definitions of the Hessenberg operations in the ordinal numbers .
No full textTechnical reportIt is proved and is given, in this paper, two alternative algebraic definitions of the Hessenberg natural numbers in the ordinal numbers:
a) by definition with transfinite induction and two inductive rules ,
b) by the free algebras of the polynomial symbols of the commutative semirings with unit
Ordinal Real Numbers 2. The arithmetization of order types .
No full textIn this paper the main results are :Proofs that the ordinal real numbers are real closed fields and complete up-to-characteristic .They are also Dedekind ,and Archemedean complete fields .They are real formal power series fields and Pythagorean complete fields It is proved and discussed the K-fundamental arithmetisationand and the binary arithmetisation of the order types