Gregorio Andria, Giuseppe Cavone, Anna M. L. Lanzolla, Mario Savino
Modelling System to Estimate Spatial and Temporal Variations in Urban Air Pollutants

This work proposes the development of a suitable air pollution model to estimate the temporal and spatial variations in concentration values of air pollutants measured in monitoring network located in urban area. The use of the proposed modelling technique in data environmental analysis allows characterising the pollutants behaviour, to validate measured data and to predict the values of contaminant substance emissions; so it results a very useful analysis tool especially when there are numerous missing or erroneous data to be validated suitably. The developed model has been tested against environmental data acquired during several years by verifying the agreement of the predicted and measured values. Finally, some information about reliability degree of estimate is provided.

Mihai Antoniu, Eduard Antoniu, Cornel Mărănducă, Fabian Cotnăreanu
A Nanocoloumbmeter for Triboelectric Charge Testing of Garments

It is shown a nanocoulombmeter (NC) of Faraday Cup (FC) type used for electrostatic charge ( x q ) measurement on cloth (gown, waistcoat, etc) of the working personal in the microelectronic industry. Unlike existing equipments of this type, the NC proposed by the authors has the advantage that measurement of x q may be done without contact with active electrode of FC, which allows not to use the elimination of connection cable (disturbing and expensive component) between FC and displaying device of the measuring instrument for x q.

Nikolaos V. Karadimas, George Kouzas, Vassili Loumos, Elefterios Kayafas
An Innovative Algorithmic Approach for Urban Solid Waste Collection

In the present paper, a new framework for urban solid waste collection and transfer is proposed. It consists of a geo-referenced Spatial Database, integrated in a Geographic Information System (GIS) and includes all the parameters required for solid waste management. These parameters involve point sources (loading spots) of waste collection, road network, and related traffic data. Moreover, dynamic data for population density, commercial traffic, time schedule of labour workers, transportation facilities and their technical characteristics are considered. In addition, an innovative methodology for the solid waste collection and transport is introduced, based on the Ant Colony Optimization (ACO) Algorithm. The objective of the proposed system is to identify the most cost-effective alternative scenario for waste collection and transport, to estimate its running cost and to simulate its application.

Daniel Belega, Dan Stoiciu
Quality Assessment of a Square Wave as a Function of Levels Accuracy

In this paper the influence of levels inaccuracy on the quality of a square wave is evaluated. This is done by means of the signal-to-noise ratio (SNR) of the square wave. An algorithm for estimating the SNR of a square wave is proposed. Simulations carried out confirm that the proposed algorithm leads to very accurate results. Some experimental results obtained based upon the proposed algorithm are also presented.

Sumitoshi Ogata, Takahiro Kawakami, Kenta Kirimoto
Visual Demonstration of Tidal Movement with Clear Cycles by Time Frequency Analysis

The present study deals with tidal movement in a Japanese coastal area where the half day and one day tidal periods are generally observed. We aim to make the dynamics of this tidal movement much clearer from a point of view of time frequency analysis using a short time Fourier transform(STFT) and a wavelet transform(WT) in addition to a conventional fast Fourier transform(FFT). These three approaches are complementary each other and available for the comprehensive understandings of complicated, oceanic phenomena. The STFT analysis reveals that the four tidal periods are observed only when the tidal power becomes relatively weak around every low tide. On the other hand, two of four periods become indiscriminating around every high tide due to a masking effect of the major, strong tidal powers. We also demonstrate that the WT analysis is exclusively available for visualizing the phase shift process of these two major tidal periods.