IMEKO Event Proceedings Search

Page 781 of 936 Results 7801 - 7810 of 9356

M. Laube, T. Rusack
CONCRETE STRESS MEASUREMENT - DEVICE AND APPLICATIONS

This contribution deals with the development of a new sensor for measuring stress in massive concrete structures. It starts with a technical overview regarding the apparatus and its theory of operation. At least some application examples from building sites ard results will be shown.

H. C. Schoenekess, W. Ricken, J.-G. Liu, W. -J. Becker
EDDY-CURRENT SENSORS AND THEIR APPLICATIONS TO FORCE AND STRESS MEASUREMENT IN STEEL REINFORCED CONCRETE

The monitoring of bridge constructions can be performed by optimised eddy-current sensors to recognise damages earlier and to reduce rehabilitation expenses. The aim is to measure the coil impedance of an eddy-current sensor positioned close to a pre-stressing cable and to conclude the change of stress in steel of reinforced concrete elements. For this purpose, measurements were taken with specified specimen to investigate the influence from the air gap variation and hysteresis curve.

Sergey Y. Yurish
INTEGRATION OF MARIE CURIE CHAIRS (EXC) PROJECT BASED COURSE ON "SMART SENSORS SYSTEMS DESIGN" INTO "SENSORS AND SIGNAL CONDITIONING" CURRICULA

This paper describes a successful approach of integration of Marie Curie Chairs (EXC) project based course on "Smart Sensors Systems Design" into the current curricula in "Sensors and Signal Conditioning" at Technical University of Catalonia (UPC-Barcelona, Electronic Engineering Department) for graduate and postgraduate students. It is strongly connected with new research results obtained during the SMARTSES project in this emerging field. The course main objectives, contents, teaching methodology, laboratory activities and qualification criteria are discussed.

Eugen-Georg Woschni
EDUCATIONAL METHODS AS MATHEMATICAL AND PHYSICAL APPROACHES DEMONSTRATED WITH TYPICAL EXAMPLES

Three typical examples with great relevance to practice are demonstrating that as well mathematics as physics must be used to solve problems and especially to gain closed solutions as necessary for application in practice. Therefore both methods have to be teached in measurement education also to-day.

Kees van Noortwijk, Richard V. De Mulder
PERCEPTION OF PLAGIARISM AND FRAUD IN EDUCATION

Plagiarism and fraud by students have increased considerably in the past decade. Information technology plays an important role here, because it provides techniques that make it possible to copy text, images and other materials almost effortlessly. Educational institutions are aware of this, and try to halt it. The problem of monitoring and dealing with fraud and plagiarism is a matter of perception in two respects: 1. it is often difficult to identify fraudulent student papers because of the large scale and intelligent techniques for cheating, and 2. students who are blamed of plagiarism often claim a different perception or qualification of their acts. Information technology can play a role in identifying plagiarism and fraud. There are a number of computer programs in existence that will check large numbers of documents to do exactly that. Conventional measures as well as effective anti-fraud policies remain necessary as students often do not perceive their actions as illegal or unethical, or use their own “perception” as an excuse.

Halina Nieciag, Zbigniew Chuchro
VALIDATION OF METROLOGICAL SOFTWARE

The problems involving the validation of metrological software are explored in this paper. This important module of measuring systems fulfills the mathematical processing of measured data. The concept of validation and their realization is considered based on building a conceptual model of software components under examination. The presented method helps software validation through estimating intervals specified within which the estimates of quantities indirectly measured should lie.

Pekka Kumpulainen, Kimmo Hätönen
COMPRESSION OF CYCLIC TIME SERIES DATA

This paper describes a method to reduce the space of stored indicator time series data collected from a telecommunications network. The method takes advantage of the cyclic nature of the collected time series and behavioral clusters of the network elements. The method separates the shape of the daily activity cycle of a network element from volume of the traffic and clusters the daily patterns to coherent groups in which each sample can be presented with the amount of traffic in the network element and a prototype pattern. Dynamic thresholds are used to determine the samples that deviate from the prototype too much and require being stored separately.

Sabiniano Araujo Rodrigues, José Ivan Carnaúba Accioly, Raimundo Carlos Silvério Freire, Isaac Maia Pessoa
ASYNCHRONOUS ANALOG-DISCRETE CONVERTER USING AN ANALOG SIGNAL PROCESSOR STABILIZED IN AN INFLECTION POINT

This brief article presents the architecture and the implementation of a converter of analog signals into discrete signals of three levels, asynchronous, with sample frequency in the gigahertz band. To make possible the implementation of this converter, it was projected and also implemented an analog signals processor that functions stabilized round an inflection point, in substitution to the operational amplifiers used in the first version of the converter and that allowed to work with high gain and slew-rate. This processor is also described in this article.

Bruno Andò, Alberto Ascia, Salvatore Baglio, Nicola Pitrone
FF_SIM: A SIMULATION TOOL FOR FERROFLUIDIC TRANSDUCERS

In this paper a simulation tool for ferrofluidic transducers is presented. The aim of the tool developed is twofold: to provide the designer with a useful tool which carries out both the behavioral analysis and the quantitative analysis of ferrofluidic devices and to support educational activity on the subject in advanced academicals courses.

Andrzej Odon, Zbigniew Krawiecki
USING LABVIEW FOR COMPUTER MODELLING OF CONVERSION METHODS IN ANALOG TO DIGITAL CONVERTERS

The applications designed in the LabVIEW environment for computer simulation of the operation principle and testing of two types of A/D converters (ADC): single-slope AD converter and dual-slope A/D converter are presented. Front panels contain graphical objects, permitting interactive communication with the user. Animation effects allow illustration of the ADC operation principle. The application permits performance of virtual experiments thanks to the possibility of control of the ADC parameters and the input signals parameters The applications can be used for education and research purposes.

Page 781 of 936 Results 7801 - 7810 of 9356