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This paper presents experiences for the development of Arduino projects of Computing Engineering students of the Viña del Mar University in Chile in a module (course) of their formative process. The computing and electronic areas usually consider different formative courses without presenting a clear hegemony in the teaching process. There exists low development of competences to produce solutions combining hardware and software for the signal processing, barriers that Arduino permits reducing in a high degree. This article highlights that in just six weeks, the students of Computing Engineering of the Viña del Mar University were able to develop competences for the use of Arduino to implement prototype systems for the acquisition of environmental variables. This is just a proof that electronics and computing are more accessible for everybody nowadays, with low barriers of cost and learning. [ABSTRACT FROM AUTHOR]

This paper presents a study and analysis of air pollutants in an area of permanent industrial and agricultural development in Chile. The study considers the watershed of the Aconcagua river including several cities of the provinces of Valparaiso, Quillota, San Felipe and Marga Marga. The information obtained from monitoring networks of air quality that are regulated by the Chilean health and environmental authorities, during the period 1998 to 2008, was used to develop a qualitative method to assess the risk of contamination to human health and vegetation. The method showed areas of high risk to vegetation and human life and other areas that should be declared as saturated zones. It was also demonstrated that it is necessary to establish primary and secondary standards, particularly for some trace elements considering the importance of the area as an exporter of agricultural products. [ABSTRACT FROM AUTHOR]

This paper presents an extension of AspectZ to model the requirements of software that manages a system of electronic health records in Chile: SYSFIC 1.0. AspectZ is an aspect-oriented language that preserves the basic characteristics of language Z and that aims to encapsulate cross-cutting concerns of a system into separate and independent entities. The application includes the use of Unified Modeling Language (UML) diagrams and a formal modeling of the system using AspectZ. The main features of the aspect-oriented modeling paradigm, such as the separation of concerns and the reduction and elimination of scattered and tangled code, are discussed. The results of this study show that the combination of aspect-oriented modeling and a formal method of software development allow obtaining more reliable solutions for critical information systems such as SYSFIC. [ABSTRACT FROM AUTHOR]

This paper determines the tractor stock and aggregate adoption growth of agricultural tractors in Chile. A logistic model was applied to determine the adoption growth and the adoption speed of agricultural tractors. Model parameters were determined by a non-linear algorithm. The tractor stock balance and the tractorization curve were used to estimate variation rate between t and t-1. This variation was associated with the introduction of tractors and those units removed from the stock. The logistic model showed a significant adjustment level and allowed estimating the rate of adoption and the adoption saturation level. It is concluded that the methodology can be applied to study technological adoption in other regions and other countries. [ABSTRACT FROM AUTHOR]