<p>Programmeringsspråken Visual C++, C# och VB.NET (Visual Basic.NET) jämförs, med tyngdpunkt på en praktisk jämförelse av fyra exempelapplikationer. </p><p>Exempelapplikationen WordCount visar att Visual C++ har förutsättningar förbäst prestanda, men att även C# och VB.NET ger helt godtagbar prestanda. Valet av färdiga klasser är viktigare än språket. Ett olämpligt val kan göra prestandan mycket sämre än förväntat, medan den allra bästa prestandan ofta erhålls med en egen implementering. </p><p>Applikationen FFT visar att flyttalsprestandan är bättre i C# än i VB.NET. Applikationen Clock visar att Visual C++ har en viss fördel i sitt färdiga ramverk för traditionella dokumentbaserade Windowsapplikationer. </p><p>C# och VB.NET vinner över Visual C++ i nästan alla övriga avseenden. De ger mindre mängd kod och tillhandahåller ny funktionalitet — som egenskaper, händelser, attribut och ett mycket omfattande klassbibliotek — som gör programmeringen enklare och mindre känslig för buggar och säkerhetshål. Valet mellan C# och VB.NET bör avgöras av projekttyp, företagskultur och utvecklarens individuella preferenser.</p>

Programmeringsspråken Visual C++, C# och VB.NET (Visual Basic.NET) jämförs, med tyngdpunkt på en praktisk jämförelse av fyra exempelapplikationer. Exempelapplikationen WordCount visar att Visual C++ har förutsättningar förbäst prestanda, men att även C# och VB.NET ger helt godtagbar prestanda. Valet av färdiga klasser är viktigare än språket. Ett olämpligt val kan göra prestandan mycket sämre än förväntat, medan den allra bästa prestandan ofta erhålls med en egen implementering. Applikationen FFT visar att flyttalsprestandan är bättre i C# än i VB.NET. Applikationen Clock visar att Visual C++ har en viss fördel i sitt färdiga ramverk för traditionella dokumentbaserade Windowsapplikationer. C# och VB.NET vinner över Visual C++ i nästan alla övriga avseenden. De ger mindre mängd kod och tillhandahåller ny funktionalitet — som egenskaper, händelser, attribut och ett mycket omfattande klassbibliotek — som gör programmeringen enklare och mindre känslig för buggar och säkerhetshål. Valet mellan C# och VB.NET bör avgöras av projekttyp, företagskultur och utvecklarens individuella preferenser.

This master thesis discusses design and realization of a security device for vehicles. This device can determine its actual location, discover unauthorized trespass and send information about this to a distant master system too. This distant master system can show the exact position of the security device on a map. The hardware and software for this security device and the software for the master system are described in this paper.

The purpose of this project was to develop a tool / utility for network administrators to maintain information about all the systems operated by the College of Natural Sciences at California State University, San Bernardino.

Ce travail a pour but essentiel de mettre au point des outils permettant une meilleure analyse des signaux Doppler provenant de l'activité fœtale. Il s'inscrit dans le cadre d'un projet RNTS (Réseau National des Technologies pour la Santé) intitulé Actifoetus. Il consiste à traiter les signaux fournis par 12 capteurs ultrasonores placés sur le ventre maternel et reliés à un appareillage Doppler à émission pulsée multivoies, développé par la société Ultrasons Technologies, Tours. Chaque capteur détecte les signaux Doppler produits par les structures fœtales en mouvement à 5 profondeurs successives dans l'utérus maternel. <br />L'objectif principal du projet est d'extraire des paramètres reflétant l'activité fœtale (rythmes cardiaque et pseudo respiratoire, mouvements des membres et du tronc, réponse à des stimuli, ...) pour la surveillance et le suivi des grossesses. Une seconde étape était de définir, à partir de ces données, l'état de bien-être ou de souffrance du fœtus en vue d'un monitorage ambulatoire de certaines grossesses à risque. Cette application en télé médecine nécessitera la mise au point d'un système portable de type Holter. <br />Le travail réalisé a comporté dans un premier temps une participation à la mise au point définitive de l'appareillage et de la méthode de recueil de données. La plus grande partie du travail a ensuite été consacrée à la mise au point et à la validation du traitement des signaux enregistrés sur des grossesses de 20 à 30 semaines. Ces enregistrements ont permis de montrer la qualité des signaux Doppler d'activité fœtale fournis par le système Actifoetus, et de valider l'utilisation de la Transformée de Fourier Rapide (FFT) et de la Fonction d'Autocorrélation (ACF) pour détecter l'activité cardiaque et les mouvements du fœtus. Nous avons pu également montrer que l'Analyse en Composantes Indépendantes (ACI) permet de séparer avec succès un mélange de plusieurs signaux Doppler. <br />La principale originalité du travail réside dans l'extraction d'informations statistiquement pertinentes concernant les mouvements et les rythmes du fœtus à partir de plusieurs capteurs ultrasonores. La mise en correspondance de ces données avec les signaux d'activité de la mère (Accéléromètre), ou de stimuli neurosensoriels, devrait permettre des applications cliniques importantes.<br />Le projet est conçu pour déboucher sur un appareil miniaturisé commercialisable à partir du démonstrateur réalisé. Les aspects de protection industrielle seront examinés aussi bien en ce qui concerne l'appareil holter lui-même, qu'au niveau des algorithmes de traitement et de fusion des données.

Demand for electrical power is increasing everyday. Along with the increase in power demand, the characteristics of the loads are also changing. From being high power consuming, simple, robust loads, today loads are more efficient, but at the same time more sensitive. The performance and life of these highly sensitive loads depend a lot on the quality of power supplied to them. <p>Power quality is any deviation of the voltage or current waveform from its normal sinusoidal waveshape. These disturbances include, but are not limited to, sag, undervoltage, interruption, swell, overvoltage, transients, harmonics, voltage flicker and any other distortions to the sinusoidal waveform. Occurrence of one or more of such disturbances is called a power quality event. Automatic classification of these disturbances is important for quick determination of the causes and to characterize possible impacts of the disturbances.<p>Modern microprocessor based protective relays have numerous integrated functions that allow them to provide information on power quality events. It is proposed to utilize the existing numerical relays to analyze the quality of power at any point in the power system. The numerical relays can be programmed to capture the oscillographic waveform or any disturbance on the analogue signal or change of state of the digital signals and store it in the form of Common Format For Transient Data Exchange (COMTRADE) format. These records are then transferred to a central monitoring workstation for off-line analysis. <p>This thesis describes a technique to automate the classification and analysis of the power quality events using relay recorded data. The technique uses voltage duration and magnitude (as specified in the IEEE Std. 1159 - 1995, IEEE Recommended Practice for Monitoring Electric Power Quality) of three phases to detect and classify the events. The classified results are then presented in a user-friendly graphical form. Fast Fourier Transform (FFT) is used to estimate the fundamental frequency and harmonic components in power systems. The graphical user interface of the power quality analysis tool is developed using Microsoft Visual C++ IDE and the algorithms are programmed in C++. <p>The proposed technique was tested using data obtained by simulating different power system disturbances as well as on the data recorded by relays. The algorithms were able to classify the power quality events accurately. In the future, this facility will: enhance the real time monitoring of power quality and provide statistical analysis of available power quality data. From the utility viewpoint, it would allow them to monitor power quality in a cost effective manner and assist in preventive and predictive maintenance besides helping them to fix differential tariff based on the quality of the delivered power. It may also turn out to be a smart tool for them to penalize the consumer polluting the power quality.

Demand for electrical power is increasing everyday. Along with the increase in power demand, the characteristics of the loads are also changing. From being high power consuming, simple, robust loads, today loads are more efficient, but at the same time more sensitive. The performance and life of these highly sensitive loads depend a lot on the quality of power supplied to them. <p>Power quality is any deviation of the voltage or current waveform from its normal sinusoidal waveshape. These disturbances include, but are not limited to, sag, undervoltage, interruption, swell, overvoltage, transients, harmonics, voltage flicker and any other distortions to the sinusoidal waveform. Occurrence of one or more of such disturbances is called a power quality event. Automatic classification of these disturbances is important for quick determination of the causes and to characterize possible impacts of the disturbances.<p>Modern microprocessor based protective relays have numerous integrated functions that allow them to provide information on power quality events. It is proposed to utilize the existing numerical relays to analyze the quality of power at any point in the power system. The numerical relays can be programmed to capture the oscillographic waveform or any disturbance on the analogue signal or change of state of the digital signals and store it in the form of Common Format For Transient Data Exchange (COMTRADE) format. These records are then transferred to a central monitoring workstation for off-line analysis. <p>This thesis describes a technique to automate the classification and analysis of the power quality events using relay recorded data. The technique uses voltage duration and magnitude (as specified in the IEEE Std. 1159 - 1995, IEEE Recommended Practice for Monitoring Electric Power Quality) of three phases to detect and classify the events. The classified results are then presented in a user-friendly graphical form. Fast Fourier Transform (FFT) is used to estimate the fundamental frequency and harmonic components in power systems. The graphical user interface of the power quality analysis tool is developed using Microsoft Visual C++ IDE and the algorithms are programmed in C++. <p>The proposed technique was tested using data obtained by simulating different power system disturbances as well as on the data recorded by relays. The algorithms were able to classify the power quality events accurately. In the future, this facility will: enhance the real time monitoring of power quality and provide statistical analysis of available power quality data. From the utility viewpoint, it would allow them to monitor power quality in a cost effective manner and assist in preventive and predictive maintenance besides helping them to fix differential tariff based on the quality of the delivered power. It may also turn out to be a smart tool for them to penalize the consumer polluting the power quality.