The late Chile born biologist Francisco J. Varela has been influential in theoretical biology throughout the last three decades of the 20. century. His thinking shows a marked development from a biologically founded constructivism (developed together with his fellow citizen, Humberto Maturana, with the main key word being “autopoiesis theory”) to a more phenomenological oriented standpoint, whi...

This paper is an attempt to assess the potential and usefulness of ANN based modeling for evaporation prediction from a reservoir, where in classical and empirical equations failed to predict the evaporation accurately. The meteorological data set of daily pan evaporation, temperature, solar radiation, relative humidity, wind speed is used in this study. The performance of feed forward back pro...

A novel approach to the problem of regression modeling for fuzzy input-output data is introduced.In order to estimate the parameters of the model, a distance on the space of interval-valued quantities is employed.By minimizing the sum of squared errors, a class of regression models is derived based on the interval-valued data obtained from the $alpha$-level sets of fuzzy input-output data.Then,...

We examine the consequences of allowing a bottleneck input supplier to vertically integrate downstream and compete with users of the input when the input has a regulated price above cost. If the supplier maximizes the sum of short-run profits from the downstream market and input market, then allowing the vertical integration will increase social surplus, even if it causes sellers of competing d...

in this research، job opportunities have been examined among 26 productive sectors of iran's economy by using input-output table in 2001.from viewpoint of employment ،production and value added، the key sectors has been diagnosed by using mri ، elasticity of input-output table، backward and forward linkages and june's corrective methods. then، job opportunities has been analyzed among...

Conventional wisdom is that in‡ation makes people spend their money faster, trying to get rid of it like a “hot potato.” Intuitively, this is one channel through which in‡ation increases velocity in theory (as in the data). Search-based monetary models seem ideal for studying this phenomenon. However, in the standard model, in‡ation acts like a tax, lowering the surplus associated with monetary...

quantitative and model-based prediction of security in the architecture design stage facilitates early detection of design faults hence reducing modification costs in subsequent stages of software life cycle. however, an important question arises with respect to the accuracy of input parameters. in practice, security parameters can rarely be estimated accurately due to the lack of sufficient kn...

among the several non-conventional processes, electrical discharge machining (edm) is the most widely and successfully applied for the machining of conductive parts. in this technique, the tool has no mechanical contact with the work piece and also the hardness of work piece has no effect on the machining pace. hence, this technique could be employed to machine hard materials such as super allo...

Risk theory refers to a body of techniques to model and measure the risk associated with a portfolio of insurance contracts. A first approach consists in modeling the distribution of total claims over a fixed period of time using the classical collective model of risk theory. A second input of interest to the actuary is the evolution of the surplus of the insurance company over many periods of ...