Basically, a “non-closed” model is a system of equations in which the number of variables is greater than the number of equations. Usually, in such a case the model becomes “closed” by adding some behavioral equations. For a non-closed model, there is the possibility to consider a number...

With the help of the Markov chains, the paper analyzes the evolution of the educational process in Romania and attempts to forecast the higher education number of graduates that will enter the labor force. Also, according to the initial assumptions of the model, may be obtained information as...

A study was conducted to store solar energy in an underground rock-bed for greenhouse heating. Experiments were carried out in two identical polyethylene tunnel type greenhouses, each with 15 m2 ground area. Rocks were filled in two canals excavated and insulated in the soil of one of the...

The problem of describing the distribution functions of tsunami wave heights is discussed. Data on runup heights obtained in field surveys of several tsunamis for the last decade are used to calculate the empirical distribution functions. It is shown that the log-normal distribution describes...

The paper explores the impacts of resource export policies on major macro variables of the exporter and the importer economies. There are two regions, North and South, trading resources for industrial goods. Each region consumes two goods (basic consumption goods and industrial goods) and...

A conference report on UNESCO and Fundacion Bariloche sponsored conference with policy-oriented scientists from Africa, Europe, Latin America, and the United States of December 1976. The focus was on global modelling, its formalization and reliability. The applications were to problems of...

We present a restriction on the domain of individual preferences that is both necessary and sufficient for the existence of a social choice rule that is continuous, anonymous, and respects unanimity. The restriction is that the space of preferences be contractible. Contractibility admits a...

Steadily growing applications of game theory in modern science (including psychology, biology and economics) require sources to provide rapid access in both classical tools and recent developments to readers with diverse backgrounds. This book on game theory, its applications and mathematical...