IMEKO Event Proceedings Search

   

Page 840 of 936 Results 8391 - 8400 of 9356

A. Michalski, A. Kalicki, Z. Staroszczyk, B. Dziadak, L. Makowski
WWW SYSTEM SOLUTION FOR HYDROCARBON POLLUTION MONITORING AND ENVIRONMENT PROTECTION

The main purpose of this paper is to present the www hydrocarbon pollution monitoring system which is under development at the Warsaw University of Technology (WUT) The dedicated system server collects data from mobile GSM/GPRS accessed observation points, and delivers information on potential pollution to the authorized www clients. The emergency alarm information is planned to be send directly to palmtop/mobile phone equipped emergency teams to assure short response time to environment contamination. The moving observation points property and country wide GSM operator coverage makes the system flexible and universal.

Luis Gurriana
THE EFFECTS OF GEOMETRIC FACTORS ON THE BEHAVIOUR OF TWO ELECTRODES AND THREE ELECTRODES CONDUCTIVITY CELLS: A MODELLING AND SIMULATION SOFTWARE APPROACH

This paper presents a study of the effects of geometric factors on the behaviour of conductivity cells for water quality monitoring.
A modelling and simulation software tool has been used to study the variation of the current density near the cells and its influence on the value of the geometric factor as well as in the value of conductivity.
The effect of the number of electrodes and their relative positions in the value of geometric constant of cells are shown as well as several plots of electric field and current density for different values of conductivity and in the presence of conductive and non conductive objects to study their influence on the conductivity measurements.

Erasmo F. Vergara, Jovani A. Steffani, Samir N. Y. Gerges, Marcos A. Pedroso
UNCERTAINTY ANALYSIS OF NOISE EXPOSURE MEASUREMENTS FOR HEADPHONE USERS

Noise emissions from sources located close to the ear, such as the headphones of telemarketing operators are determined using the international standard ISO 11904. The MIRE and manikin techniques are applied simultaneously to estimate the levels of noise exposure. The uncertainties from different sources are estimated for the determination of the diffuse-field related equivalent continuous A-weighted SPL from an earphone.

C. De Capua, A. Liccardo, R. Morello
A PORTABLE MEASUREMENT SYSTEM BASED ON A PDA DEVICE FOR ACQUIRING AND TESTING ELECTROMAGNETIC FIELD LEVELS

In this paper an user-friendly and manageable measurement system for environmental monitoring and control applications is presented. The specific experimental case concerns the acquisition and processing of the exposure levels to environmental electromagnetic field (EMF). The proposed measurement instrument is equipped with a Personal Digital Assistant (PDA) device and a field probe sensing the electromagnetic field in high frequency range. The small dimensions make it a practical tool in order to monitor the pollution state in urban area. The embedded application allows user to acquire and test in real-time the field levels in order to verify their conformity with fixed exposure limits. The processing stage optimization is achieved by analyzing the influence of measurement uncertainty on the comparison process between measured values and tolerance limits. So, according to measurement result, a confidence level provides information on the response reliability about the compliance or non-compliance with the fixed thresholds. A final report on the PDA display shows user the general EMF trend and the possible limit overcoming happening. Then data can be transmitted to a remote client for further analysis, so designing timely appropriate intervention plans in order to safeguard population from potential hazardous situations.

Beata Palczynska, Ludwik Spiralski, Jacek Wyszkowski
ASSESSEMENT OF LOW FREQUENCY ELECTROMAGNETIC FIELD INTENSITIES ON BOARD OF SHIPS

The methodology of measurements of low frequency electromagnetic field intensity, existing on the seagoing ships, is presented. The selected results of the tests taken during the ship’s stay in the port and at sea, are performed. In some chosen places, the level of electric and magnetic constituents of the field intensity was assessed. The sources of strong magnetic field in the low frequency range have been located, its spectrum course was of 1/f type. Due to the analysis of measurements results, the level of electromagnetic field intensity was evaluated, in reference to standards and recommendations of marine classification societies. The analysis of the emitted disturbances level was carried out, bearing in mind the crew protection against the excessive emission of electromagnetic field.

A.F. Clain, M.J.C.S. Bragança, A.M.G.F. Azeredo, L. Tauhata, C.C.S Conceição, E.M.O Bernardes
PREPARATION OF A SOIL REFERENCE MATERIAL WITH HIGH THORIUM CONCENTRATION FOR DETERMINATION OF RADIONUCLIDES FROM THORIUM AND URANIUM NATURAL SERIES

It was prepared a reference material from a soil with high thorium concentration from a region with high natural radioactivity. Performed tests using gamma spectrometry and statistical programs showed that the prepared material was homogeneous and enough stable to be used as an in-house reference material in intercomparison exercises.

Yusaku Fujii, Shigeru Kumakura, Noriaki Yoshiura, Naoya Ohta, Hiroaki Otsuka
RESIDENTIAL DISTRICT SECURITY USING HOME COMPUTERS

We are promoting a novel concept "the e-JIKEI Network": a community will have a strong ability to prevent crime only if some residents keep watch on what happens around their houses with the aid of their own home computers, commercially available cheap cameras, and freesoftware. Under this scheme, residents would view their surroundings using cheap cameras as their own eyes and home computers as their own brains with altruistic spirit. Community safety would thus be realized by the voluntarily cooperation and altruism of ordinary citizens using widespread modern technology. In this paper, an attempt for realizing the residential district security using the e-JIKEI Network is described.

Oleh Velychko, Tetyana Gordiyenko
NEW TASKS OF METROLOGY ON GLOBAL ENVIRONMENTAL PROBLEMS

Significant attention is paid to general questions relative to new activity of international organizations for solution of new tasks of metrology on global environmental problems, monitoring of global climate change, and Webbases e-learning for technical environmental experts, which are conducted by international environmental organizations.

T. Katsumata, H. Aizawa, W. Takechi, K. Ito, S. Komuro, T. Morikawa
GAS SENSING USING PHOTOLUMINESCENCE FROM PHOSPHOR CONTAINED SILICA GEL

Variations in the photoluminescence (PL) spectra from porous silica gel containing the luminous organic pigments were evaluated before and after the exposure in the vapors of CHCl3. Peak intensity of PL from rhodamine and fluorescein contained silica gel vary with the concentration of pigment. Peak intensity of PL also varies after exposure in the organic vapors of CHCl3. Temperature dependences of PL intensity from rhodamine and fluorescein contained silica gel are also evaluated for sensor applications. The organic luminous pigments contained silica gel is suggested to be useful fluorescent sensor materials.

Shigeru Takayama, Motoshi Hiraoka, Koichiro Mori, Komyo Kariya
LANDSLIDE DISASTER MONITORING BY WIRELESS SENSING NETWORK

Sensing system to monitor natural disasters faces much hard conditions. Natural disaster occurs suddenly, and damages sensor system. Then, the sensor system should be designed as distributed node network. In addition to that, the network should have some characteristic functions like self-recovery, autonomous operation and effective data transmission in urgent. This paper describes the construction of autonomous sensing node network to recover the damage by landslide disaster and to transmit urgent data effectively. The sensing node network is operated by three mode(initializing mode, measuring mode and urgent mode). By switching these operation modes autonomously, the sensing node network becomes robust system to the loss/insert of sensing node and the dynamic control of data transmission. Finally by some experiments, the effectiveness of operation is shown.

Page 840 of 936 Results 8391 - 8400 of 9356