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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： Jamal Krini Josef Börcsök Department of Computer Architecture and System Programming University of Kassel Kassel Germany

The software reliability plays an important role nowadays. From year to year the systems become more and more complex. Consequently, the software becomes more and more complex, too and this can cause more software errors. In this paper a new method is introduced, which serves to predict the reliability of software in a better way. Furthermore, the presumption that the hazard rate is constant is rebutted and a more realistic assumption is made. It is demonstrated that by the use of the new approach the prediction of the number of remaining errors is possible in a better way.

关键词： Software Hazards Optimization Data models Software reliability Mathematical model

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International Conference on Technological Advances in Electrical, Electronics and computer Engineering (TAEECE)

作者： Samer Telawi Ali Hayek Josef Börcsök Department of Computer Architecture and System Programming University of Kassel Kassel Germany

Nowadays, many noticeable continues efforts are taken in the vehicle industry to develop robust intelligent systems that control and monitor the vehicles during operational time to lower the side effects of some abnormal conditions such as sliding and spinning; because of their main role in affecting the human safety and the vehicle life-time as well as the costs related to maintenance. Therefore, the importance of manipulating and controlling these special statuses with respect to safety and cost are the main motivations behind conducting this research work. In this paper a conceptual prototype of a safety-related platform for monitoring and recognizing the vehicles states by means of vibration sensors incorporated with incremental rotary encoders is presented. Additionally, the proposed approaches and algorithms to detect the vehicle status based on the captured sensory data are also presented.

关键词： Vehicles Vibrations Sensors Safety Acceleration Spinning Wheels

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Error detection on precise laser scanner based navigation

Error detection on precise laser scanner based navigation

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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： Richard Thum Josef Boercsoek The Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

Autonomous guided vehicles have major benefits in terms of a rail bound conveyor technology because they are able to respond flexibly to changes in the application area. In many areas, safety-related position detection is necessary to avoid accidents. Derived from this position the driving speed in the work areas can be reduced in a safe way and minimum distances can also be observed in a safe manner. For this purpose, it is necessary to permanently control the measured position with regard to the disturbance variables and precision of measurements and in case of a deviation they have to be corrected in a highly reliable way. The solutions that are known so far do all imply two sensors that monitor each other. In the approach shown here, the required diagnostic coverage for a safety-related position determination is achieved through the use of only one laser scanner as well as through the help of algorithms that are implemented in a safety-related evaluation control. The focus of this paper is set on the position and orientation errors that are caused by measurement deviations.

关键词： Vehicles Position measurement Sensor systems Logistics Cameras Control systems

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Miniaturized safety systems: A way for future tasks in safety engineering

Miniaturized safety systems: A way for future tasks in safet...

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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： Josef Börcsök Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

Application specific integrated circuits (ASICs), which represent a target platform for safety-related applications, were already covered in the first edition of the standard IEC 61508 in terms of functional safety. Corresponding requirements are introduced in part 2 of the standard. However, using ASICs with on-chip redundancy for safety applications has been introduced only in subsequent drafts of the standard. Corresponding core requirements for on-chip redundancy for ASICs are explained in the second edition of the standard. The theoretical conclusions and analyses have been implemented in several research projects based on a redundant system architecture consisting of two RISC cores with a hardware comparator as a diagnosis unit. In this paper, the implementation of safety-related on-chip systems will be discussed on the basis of the theoretical requirements of the standard as well as on the basis of practice-related experiences.

关键词： Safety IEC Standards system-on-chip Power demand Hardware Software

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Basic concept for the selection of an appropriate “software failure prediction model”

Basic concept for the selection of an appropriate “software...

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World Conference on Complex systems (WCCS)

作者： Jamal Krini Josef Börcsök Department of Computer Architecture System Programming University of Kassel Kassel Germany Universitat Kassel Kassel Hessen DE

Software is nowadays used in almost all systems. Therefore, the reliability of the software is a crucial aspect in safety engineering. Software errors can cause life-threatening situations. To counter this, software reliability models are used. Currently, there are a great number of software reliability models existing. The model that will be considered as the most appropriate is depending on the respective project. That is why it cannot always be decided in advance which model would be the most suitable. In this paper a method is presented that serves to show how the most appropriate model for a project can be selected.

关键词： Software reliability Software Hazards Prognostics and health management Hardware

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Cost optimization and high available heterogeneous series-parallel redundant system design using genetic algorithms

Lecture Notes in Electrical Engineering

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Lecture Notes in Electrical Engineering 2015年 343卷 283-305页

作者： Chaaban, Walid Schwarz, Michael Börcsök, Josef Department of Computer Architecture and System Programming University of Kassel Willhelmshöher Allee. 71 Kassel34121 Germany

Heterogeneous redundant series-parallel systems allow the mixing of components within the same subsystem. This diversity feature may improve the overall characteristics of the system compared with the homogeneous case in term of less susceptibility against so called common-cause failures and reduced cost. That means they guarantee longer availability and are quite suitable for systems that are designed to perform continuous processes. But the main challenging task is to determine the optimal design that corresponds to the minimal investment costs and satisfies the predefined constraints. This kind of combinatorial optimization tasks is perfectly solved using heuristic methods, since those approaches showed stability, powerfulness, and computing effectiveness in solving such matters. This task is more complex than the homogeneous case since the search space is getting larger due to the fact that every component available and that can be deployed in a subsystem has to be taken into account. This fact leads definitely to greater chromosome length and makes the search more time consuming. The algorithm has been implemented in Matlab and three different existing models (Levitin, Lisnianski, and Ouzineb) have been considered for a comparison with the homogeneous case and for validation purposes. © Springer International Publishing Switzerland 2015.

关键词： Genetic algorithms

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Patient vital signs monitoring via android application

Patient vital signs monitoring via android application

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International Conference on Advances in Biomedical Engineering (ICABME)

作者： Roy Abi Zeid Daou Elias Aad Farid Nakhle Ali Hayek Josef Börcsök Lebanese German University Public Health Faculty Jounieh Lebanon Department of Computer Architecture and System Programming University of Kassel Kassel Germany Universitat Kassel Kassel Hessen DE

This paper presents a system that is able to monitor the patient vital signs (Heart Rate, SPO 2 , NIBP, ECG, temperature and respiration rate) and send them continuously to the doctor's android phone device. The system enables multiple patients to be connected to the same doctor. Within the system, the health care professional may activate/deactivate any of the vital signs sensors. He can also set a prescription for the patient, schedule a meeting,... When bad activities are received, a message is directly sent to the doctor and to the patient relatives in order to alert them. Note that the Bluetooth connection is used to send/receive data between the patient platform and its android system. The tested results showed an almost error free system with an accuracy above 95% and a few milliseconds delay between the vital signs reading and their upload over the server.

关键词： Medical services Sensors Servers Temperature measurement Electrocardiography Bluetooth Telemedicine

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Approach of safety-related monitoring and analyzing of human motion with limited sources of captured sensory data

Approach of safety-related monitoring and analyzing of human...

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International Conference on Technological Advances in Electrical, Electronics and computer Engineering (TAEECE)

作者： Ali Hayek Samer Telawi Josef Börcsök Roy Abi Zeid Daou Department of Computer Architecture and System Programming University of Kassel Kassel Germalny Universitat Kassel Kassel Hessen DE Department of Biomedical Technologies Lebanese German University Sahel Alma Lebanon

Nowadays, many major efforts and interests are focused on providing better services for some elders and patients who have to live alone, while they are exposed to different dangers during their daily life activities such as falling. The necessity to reduce the negative consequences of falling, whether related to physical or psychological health or to financial encumbrances, by providing an immediate help and a continuous remote monitoring, drives a corresponding meaning to develop a reasonable safety-related monitoring and detecting system of the human motion with respect to the privacy and the simplicity. In this paper, a conceptual prototype of safety-related platform for monitoring human activities by mean of limited number of acceleration and rotation sensors is presented. Additionally, the proposed approach that adopts the artificial neural networks to overcome the challenges emerged by reducing the number of motion sensors and to compensate the missing data is also introduced. Moreover, the required procedures for collecting training and testing data are also summarized in the last section.

关键词： Sensors Neural networks Skeleton computer architecture Motion segmentation Thigh Monitoring

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Wireless communication modeling for safety related systems

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International Journal of Circuits, systems and Signal Processing 2014年 8卷 330-336页

作者： Pendli, P.K. Schwarz, M. Wacker, H.D. Boercsoek, J. Department of Computer Architecture and System Programming University of Kassel Wilhelmshoeher Allee 71 Kassel34121 Germany

This paper deals with the modeling of wireless communication for safety related systems. To achieve safe wireless communication for safety related systems, the wireless channel is modeled by taking into account both bit errors and erasures (loss of information) that occur during wireless transmission of the information. To reduce the bit errors and to detect the erasures, a coding method for transmitting the code word is suggested in this paper. With this coding method, parameters such as bit error, probability of undetected error are reduced and the bit erasures that occur due to fast fading and channel losses are detected confidently. The safety methods as defined according to the European standard EN 50159-2 are taken into consideration and their implementation to achieve safe wireless communication for safety related systems is explained in this paper. The mathematical derivations to calculate the probability of failures per hour (PFH) values for wireless communication with the suggested coding method are derived. With the derived PFH equation, safety integrity level (SIL) achieved for a particular wireless technology can be determined. Finally, the SIL levels achieved for Bluetooth technology are shown. © 2014 North Atlantic university Union. All rights reserved.

关键词： Bit error rate

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Approach to the development of an FPGA-based safety-related, complete communication computer system 10

Approach to the development of an FPGA-based safety-related,...

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10th International Symposium on Telecommunications, BIHTEL 2014

作者： Gracic, Emil Hayek, Ali Borcsok, Josef Computer Architecture and System Programming University of Kassel Kassel Germany

ISBN: (纸本)9781479941360

This paper describes the implementation and integration process of a complete communication computer system on the field programmable gate array (FPGA). After such a design is reached, safety measures are integrated to achieve a safety-related architecture. For this purpose a diagnostic unit will be implemented, consisting of hardware and software tests. Hardware tests are related to the control of the FPGA functionality. They are based on the integration of two existing methods to reach complete hardware test coverage. The software tests are used for a continuous testing of the whole system (this means testing the central processing unit, bus systems, peripherals and memory). Furthermore, a safety multiplexer is integrated with the task to turn off the current operating system (main system) and to turn on a redundant system when a failure is introduced via the diagnostic unit. The safety multiplexer has to give the permission to the redundant system to receive the outputs from the main system in a way that is free from faults. The microcontroller ColdFire is used as a basis, which provides numerous features for the control of various peripherals as well as the connection of various types of memory. © 2014 IEEE.

关键词： Program processors

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