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Towards safe data flow processing by integration of design by contract in deterministic UML activities

Towards safe data flow processing by integration of design b...

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

作者： Zamira Daw Marcus Vetter Josef Boercsoek Institute of Embedded Systems Hochschule Mannheim-University of Applied Sciences Mannheim Germany Department of Computer Architecture and System Programming University of Kassel Kassel Germany

Data flow processing is a common task of embedded systems which is usually modeled as a pipeline. Errors in a block of this pipeline can be propagated through it thus leading to unexpected and erroneous behaviors. For safety related applications, this pipeline has to be able to identify and react to failures. The DMOSES model-driven development method uses deterministic UML activities to describe and implement data flow processing. This method ensures deterministic behavior of concurrent processing. Design by Contract defines formal, precise and verifiable interfaces for software components. We propose a development method for safe data flow processing based on the integration of this concept in deterministic UML activities. This integration allows the identification of errors by detection of contracts violation. This paper presents an extension of the DMOSES tool for contracts verification at the model level and their monitoring at runtime.

关键词： Unified modeling language Contracts Monitoring Embedded systems Object oriented modeling Safety Pins

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Network-based safety-related vibration and position analysis for railway vehicles

Network-based safety-related vibration and position analysis...

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International Conference on Connected Vehicles and Expo (ICCVE)

作者： Samer Telawi Yusuf Sima Bashier Machmur Ali Hayek Josef Börcsök Udo Pinders Walter Schreiber Department of Computer Architecture and System Programming University of Kassel Kassel Germany Universitat Kassel Kassel Hessen DE Reuschling GmbH & Co KG Hattingen Germany

Nowadays, many considerable efforts are focused on the development of efficient and effective systems that increase the productivity of vehicles by controlling and manipulating the extraordinary states, such as sliding and spinning, during the operational time. Those states play a central role in the performance of the vehicles described as an interaction among different mechanical parts regarding their life-time, their wear and tear, as well as the maintenance costs. In addition, these states ultimately affect the safety of target system and its environment. Therefore, the necessity of avoiding, controlling, or manipulating these states to lower their effects into a tolerable level has become the major driver for conducting the current research work. In this paper, a prototype for safety-related platform for detecting and controlling railway vehicles states by means of vibration capture is presented. Additionally, test procedures in order to collect the vibration data related to each state are presented; these tests were performed under the supervision of an industrial partner. Moreover, the recognized initial patterns of the vibration signals related to the studied states are also introduced.

关键词： Safety Vehicles Acceleration Vibrations computer architecture Sensor systems

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Budgetary and Redundancy Optimisation of Homogeneous Series-Parallel systems Subject to Availability Constraints Using Matlab Implemented Genetic Computing

Budgetary and Redundancy Optimisation of Homogeneous Series-...

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IET Irish Signals and systems Conference

作者： Walid Chaaban Michael Schwarz Josef Boercsoeck Department of Computer Architecture and System Programming University of Kassel

ISBN: (纸本)9781629935881

This paper deals with finding optimal structures and redundant safety designs with minimal costs for series-Parallel multi state system (MSS) configurations subject to availability constraints using genetic algorithms as optimisation mean, since these biologically inspired evolution concepts showed stability, powerfulness, and effectiveness in solving such complex combinatorial optimisation tasks. The routine has been written in Matlab and the tests have been performed using some test data belonging to already existing models (Levitin, Lisnianski, and Ouzineb).

关键词： Genetic Algorithms Series-Parallel systems Optimisation Redundancy Allocation Problem (RAP) Multi State system (MSS) Universal Moment Generating Function (UMGF)

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Monitoring system for Prediction and Detection of Epilepsy Seizure

Monitoring System for Prediction and Detection of Epilepsy S...

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International Conference on Advances in Computational Tools for Engineering Applications, ACTEA

作者： Nashaat el Halabi Roy Abi Zeid Daou Roger Achkar Ali Hayek Josef Börcsök Department of Computer and Communications Engineering American University of Science and Technology Beirut Lebanon MART Learning Education and Research Center Chananir Lebanon Department of Computer Architecture and System Programming University of Kassel Germany

Epilepsy is a neurological disorder associated with abnormal electrical activity in the brain, which causes seizures. The occurrence of seizure is not predictable; the duration between seizures, as well as the symptoms, varies from patient to another. Since the seizures are not predictable, and most of epileptic patients suffer from physical risky symptoms during the seizure, such patients are not able to perform daily work activities. The objective of this project is to design and implement a monitoring system for epileptic patients; the system should continuously check some vital signs, analyze the measurements, and decide whether the patient is nearly to have a seizure or not. Whenever a seizure is predicted, the system initiates an alarm. In addition, a notification should be sent to the health care responsible, as well as one preferred contact. By implementing the monitoring system, people who suffer from epilepsy will have more chance to work and live a normal life. Thus, this paper presents the concept of the overall system and shows results of the implemented systems: EEG, ECG and Fall Detection system. Results have shown that the fall detection accuracy reached 99.89% whereas the accuracy of the prediction using the ANN was about 97.34%.

关键词： Electroencephalography Epilepsy Feature extraction Tools Monitoring Artificial neural networks Support vector machines

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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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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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Design and Implementation of a QoL Improvement system for Visually Impaired Patients 5

Design and Implementation of a QoL Improvement System for Vi...

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5th International Conference on Advances in Computational Tools for Engineering Applications, ACTEA 2023

作者： Abi Zeid Daou, Roy Beaino, Jad Hawat, Johnny Ibrahim, Ramy Hayek, Ali Boercsoek, Josef Olmedo, Jose Javier Serrano Université la Sagesse Faculty of Engineering Mechatronics Department Beirut Lebanon MART Learning Education and Research Center Chananir Lebanon University of Applied Science Hamm-Lippstadt Department Lippstadt 2 Hardware Engineering Hamm59063 Germany University of Kassel Faculty of Electrical Engineering/Computer Science Department of Computer Architecture and System Programming Germany Centro de Tecnología Biomédica Universidad Politécnica de Madrid Lab of Bioinstrumentation and Nanomedicine Spain

ISBN: (纸本)9798350309959

Visually impaired people encounter several challenges in their mobility and navigation. Their daily activities are obstructed due to their inability to adapt or recognize accurately their surroundings, especially outside their house which they are more familiar with. Thus, it becomes the main reason of accidents, falling off, getting lost in unknown areas, etc. Furthermore, one of the sensory systems that helps the body to process data about the external environment is the visual system. Blind people also lose touch with the outside world, develops poor motor habits, which results in postural problems as a result. This project will assist visually impaired people in their daily life and simplify normal tasks through a system combining two previously designed projects, 'Smart Shoes for Blind and Visually Impaired People', and 'Human posture monitoring device'. The multifunctional system is developed with the goal of securing safe movements for visually impaired people as well as maintaining a good back posture by detecting leaning postures (LP). The purpose of the smart shoe is to identify obstacles and protect the user from unintended accidents. A compatible Android application has been developed to alert the user when there is an obstruction or when he is walking on a wet surface. Voice alarms will be used to acoustically alert the user. If the user collapses, a message with their position will be sent right away to a relative. On the other hand, the smart vest will identify the position of the user's back and alert him to maintain a straight posture through the same application as well. As the system is dealing with human health, some safety measurements would be taken into consideration to implement a safe electrical system in order to reduce error and to increase accuracy. © 2023 IEEE.

关键词： Accidents

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Design and testing tool for a safe monitoring system for neurodegenerative disorder patients

Design and testing tool for a safe monitoring system for neu...

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International Conference on Advances in Computational Tools for Engineering Applications, ACTEA

作者： Nashaat El Halabi Roger Achkar Roy Abi Zeid Daou Ali Hayek Josef Börcsök Department of Computer and Communications Engineering American University of Science and Technology Beirut Lebanon Department of Biomedical Technologies Faculty of Public Health Lebanese German University Sahel Alma Lebanon Department of Computer Architecture and System Programming University of Kassel Germany

This paper aims to develop a sensor based monitoring and analyzing system for Neuro-Degenerative Disorder patients (NDD); this may consist on SpO2 sensor, Electrophysiological sensors, NIBP, Motion Capture sensors and Eye Monitoring sensor, taking into consideration an acceptable cost for the whole system. Recorded data will be sent to an embedded decision making unit where detection, analysis, classification, prediction and action control will occur. The sensors and the decision making unit will be implemented in a comfortable jacket that doesn't affect the patients' movements and that can be used by several patients with reduced sensor placement alterations. The decision that can be made is creating a stimulus to avoid falling in case of sudden stop while moving, initiating an alarm, sending a notification to a mobile phone application, and/or telemedicine monitoring features. Artificial Neural Networks will be used to classify and predict the abnormal cases where action should be taken, and since the sensors will be continuously recording, it is possible to achieve continuous learning for the ANN as a first phase. Initial models will be defined by testing normal behaviors and some known abnormal behaviors or symptoms related to the electrical activity and other characteristics of the heart, oxygen saturation level, eye activity and body motion.

关键词： Alzheimer's disease Parkinson's disease Monitoring Artificial neural networks Decision making Biomedical monitoring

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Optics in computer architectures: Basis of WDM, Technologies and Potentials

Optics in Computer Architectures: Basis of WDM, Technologies...

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ICONS International Conference on systems

作者： Y. Wang T. Kusserrow S. Irmer A. Hasse M. Bartels N. Dharmarasu H. Hillmer J. Borcsok O. Mikami Institute of Nanostructure Technologies and Analytics (INA) University of Kassel Kassel Germany Department of Computer Architecture and System Programming University of Kassel Germany Department of Information Telecommunication and Electronics Tokai University Hiratsuka-shi Japan

We present novel concepts, technologies and potentials of optical data communication, especially for future computer architectures. The WDM (wavelength division multiplexing) and the optical wiring technologies are explained in detail. Experimental results of tunable optical filters, which play a major role in WDM systems, are reported. New concepts for novel optical interconnectors and novel miniaturized lasers for direct generation of green light are proposed as examples for possible next generation components to improve the performance of optical communication based computer architecture.

关键词： Optical computing computer architecture Wavelength division multiplexing Optical filters Optical interconnections Data communication Wiring Tunable circuits and devices Optical devices Optical fiber communication

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Reliable system Design with a High Degree of Diagnostic Procedures for Embedded systems

Reliable System Design with a High Degree of Diagnostic Proc...

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IET Irish Signals and systems Conference

作者： Michael H. Schwarz Josef Boercsoek Department of Safety Computer Technology University of Kassel Department of Computer Architecture and System Programming University of Kassel

ISBN: (纸本)9781629935881

Maintenance starts with reliable diagnostics. programming Logic Controllers (PLCs) are often equipped with a high degree of diagnostic procedures in order to ensure that the processing unit is functioning correctly. It is vital to verify that the system with its programme is still within a 'healthy' state, otherwise a safety function is called and the system is brought into a safe state, or if possible, defect and malfunctioning components are exchanged during operation and the process can continue without shutting down the system. However, when it comes to smaller devices such as intelligent sensors, embedded controller devices with the functionality of an e.g. PID (Proportional-Integral-Derivative), predictive controller, filter or analytical algorithm, which is embedded into a FPGA or micro-controller then diagnostics and verification methods are often not considered in the way they should be. For example, if an intelligent sensor system is not able to diagnose that the sensor-head is malfunctioning, but the sensor-head still provides some data, then the smart algorithm bases its calculation on wrong data, which can cause a dangerous situation. This paper investigates and shows recent results to combine diagnostic methods for small scale devices. Several safety-related structures are considered with a high degree of diagnostic coverage. The paper presents relevant procedures and structures to increase the reliability of small devices without utilising a full scale microcontroller system.

关键词： Reliability Safety structure Maintenance Diagnosis

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