When transacting and interacting through open computer networks, traditional methods used in the physical world for establishing trust can no longer be used. Creating virtual network substitutes with which people, org...
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More and more microcontrollers are embedded in a large area of products from industrial to domestic domains. A good example is the automobile, a modern one containing tens of microcontrollers. As their number increase...
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ISBN:
(纸本)1424402719;1424402727
More and more microcontrollers are embedded in a large area of products from industrial to domestic domains. A good example is the automobile, a modern one containing tens of microcontrollers. As their number increased the communication between them became necessary. The serial solution was preferred and a lot of serial buses and protocols were developed optimizing different parameters of the communication. Several examples are: RS232, LIN, SPI, CAN and so on. Monitoring serial communications is necessary in R&D phase, e.g. for creating virtual transfer partners, and in testing and debugging phases. The paper describes a message based monitoring tool for the RS232 bus and monitoring tools for the LIN and SPI buses. Many microcontrollers contain the LIN and SPI buses and almost all of them include the RS232 bus. The created tools work in passive mode, monitoring the transfers and sending the data to a PC or in active mode (only for the LIN bus), interfering in the communication and sending headers, responses or injecting typical errors
The aim of this paper is to introduce a new approach which describes an automatic transformation process of electronic flat documents (HTML document for example), into reusable learning objects. Thus, the transformed ...
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The aim of this paper is to introduce a new approach which describes an automatic transformation process of electronic flat documents (HTML document for example), into reusable learning objects. Thus, the transformed content can be integrated, within management learning system. Our methodology proposes, firstly, a syntactical transformation of a flat electronic document into well-structured document. It tends secondly, to perform a semantic categorization of each piece of the content into an equivalent type of reusable learning object (Ajami, 2004). Such a semantic categorization is based on the construction of artificial neural networks
The PC based virtual instrumentation is a dynamic and attractive alternative to the classic instrumentation. Its main advantages are: flexibility and adaptability, low cost, wide development of extension PC boards wit...
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The PC based virtual instrumentation is a dynamic and attractive alternative to the classic instrumentation. Its main advantages are: flexibility and adaptability, low cost, wide development of extension PC boards with measurements features, attractive representation of measurement results, in different forms, on the PC's monitor. The paper presents a system identification application with PC based (virtual) instrumentation. The virtual system is made of an external board, connected to the PC via the USB interface and a software tool, Agilent VEE (Visual engineering Environment). The presented virtual system can work as a voltmeter, ammeter, signal generator, digital oscilloscope and power supply. The main contribution of the paper is the extension of the application domain of the virtual instrumentation system to system identification. The identification method consists of applying to the system input a binary pseudorandom signal (BPRS) and determining the impulse response of the system as being well approximated by the cross-correlation function between the input signal and the answer of the system. The application is intended for educational purposes but can be used in other areas too
Digital watermarking medical images provides security to the images. The purpose of this study was to see whether digitally watermarked images changed clinical diagnoses when assessed by radiologists. We embedded 256 ...
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Digital watermarking medical images provides security to the images. The purpose of this study was to see whether digitally watermarked images changed clinical diagnoses when assessed by radiologists. We embedded 256 bits watermark to various medical images in the region of non-interest (RONI) and 480K bits in both region of interest (ROI) and RONI. Our results showed that watermarking medical images did not alter clinical diagnoses. In addition, there was no difference in image quality when visually assessed by the medical radiologists. We therefore concluded that digital watermarking medical images were safe in terms of preserving image quality for clinical purposes
This paper proposes a new call quality measure based on mobile signal strength measurements to evaluate performance of handoff algorithms in wireless cellular networks. The proposed measure allows the quantification o...
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This paper proposes a new call quality measure based on mobile signal strength measurements to evaluate performance of handoff algorithms in wireless cellular networks. The proposed measure allows the quantification of the impact of the handoff algorithms of performance. Using the proposed measure we compare existing handoff algorithms to identify the trade-off between signal quality and required number of handoffs. Our results indicate that a handoff method based on a threshold with 2 dB hysteresis provides better performance compared to the conventional wisdom of 3 dB hysteresis. We provide a benchmark value for handoff algorithms based on an off-line heuristic method using the new measure. Our benchmark shows that there is substantial room for improvement of the existing handoff algorithm
Pedestrian modelling is frequently used for making decisions regarding the planning, design, and management of pedestrian areas. For example, the designer of a new shopping mall would be interested in what locations p...
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ISBN:
(纸本)0975840002
Pedestrian modelling is frequently used for making decisions regarding the planning, design, and management of pedestrian areas. For example, the designer of a new shopping mall would be interested in what locations people are likely to be attracted to, or the operators of a large-scale event might like to know where congested areas are likely to occur so they can develop management plans. The outputs of thesemodels can include flows on certain routes, entry and exit counts, and level-of-service graphs. Computational modelling of pedestrians is sometimes difficult due to the complex and random nature of pedestrian movement. Pedestrians often make unconscious decisions that are difficult to explain or measure. They move at a much smaller scale and in a less constrained manner than other vehicles, meaning techniques developed for modelling other modes of transport cannot be translated to pedestrians easily. Pedestrians interact with many different kinds of environments. Enclosed spaces can consist of rooms connected by corridors leading to and from exits (eg. office buildings, shopping centres) or can be more open-plan (eg. sports arenas, train stations). Mixed mode environments consist of areas, possibly shared with cars or public transport, which connect the pedestrian to building entrances and other streets. Open areas consist of open areas and/or designated pathways where pedestrians wander and sightsee. Some environments are a hybrid of the above, for example sports precincts or universities, and generally include pedestrian areas or low vehicle traffic areas containing several attractions. There are also several different types of behaviour exhibited by pedestrians in these environments. Some pedestrians know where they are going, how to get there, and has a very low probability of being distracted on the way (purposeful and familiar). Some know where they want to go, but is not sure how to get there and as a result may get distracted or lost on the way (purpose
In this paper we introduce Self-Organizing Map-based techniques that can reveal structural cluster changes in two related data sets from different time periods in a way that can explain the new result in relation to t...
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