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This paper presents the development of an energy efficient environmental sensor that sends measurement data to a cloud platform using HTTP (Hypertext Transfer Protocol) requests. The device is based on a programmable system-on-chip (PSoC), and is equipped with a temperature and relative humidity sensor for taking measurements and with a WLAN (wireless local area network) module for sending data to...
High reliability is an important characteristic of Cyber-Physical Systems (CPS). New CPS components/subsystems have to be developed for the detection, isolation, recovery and prevention of failures and external attacks. To address this challenge, we propose a multi-agent-based subsystem architecture that can detect and prevent CPS hardware components' failures. The architecture comprises of several...
Global warming is one of the most important issues of the last few decades. Among other gases with greenhouse effect, carbon dioxide has one of the largest contributions to global warming. To estimate its footprint upon the environment, usually it is measured in fixed stations, located near the industrial processes which are the source for this gas. The amount of carbon dioxide produced by natural...
Cyber-Physical Systems (CPSs) represent a new generation of engineered systems facing significant scientific challenges in terms of modeling, architecture, distributed computations and network control, verification/validation mechanisms, and many others. CPSs modeling, a significant aspect of their design and development, can be performed using the Model-Driven Engineering (MDE) paradigm. This approach...
The research presented in the current paper addresses the use of data mining techniques for enhancing the dependability characteristic in the case of cyber-physical systems. A cyber-physical system for environmental monitoring was considered as a case study. In this context, the main task of data mining is to predict the missing sensor values caused by hardware and software components malfunctions...
This paper presents the development of a portable adaptive environmental data logger with an emphasis on low-power operation. The developed device is based on a programmable system-on-chip (PSoC), records temperature and relative humidity values, and saves the data on a microSD memory card. The main characteristics of the device consist in low power consumption, small dimensions and adaptive operation...
This paper discusses the aspects concerning the communication between the components of cyber-physical systems (CPSs). The characteristics and the requirements concerning the transfer of information within CPSs and the related open issues are presented. In this context, a CPS solution for environmental monitoring (temperature and relative humidity), based on the IEEE 802.11 b/g standards, was developed...
Cyber-Physical Systems (CPSs) represent a new generation of digital systems, where cyber entities and physical devices cooperate towards a set of common goals. The continuously evolving requirements concerning CPSs have led to the necessity of creating a dependability assurance framework. The present paper introduces a methodology for creating a dependability run-time model of CPSs in a dynamic and...
Cyber-physical systems integrate physical and cyber components for high performance, self-maintenance, self-organization, self-assembly, while the process must be dependable, safety, securely, efficiently and in real-time. The research challenges of cyber-physical system are concerning: abstractions and architecture; distributed computation and networked control; verification and validation. This...
This paper presents definitions characterizing the concepts regarding cyber-physical systems and dependability. Cyber-physical systems incorporate computing, communication and storage capabilities with monitoring and/or control of entities in the physical world in a dependably, securely, efficiently and real-time way. The challenges of cyber-physical system research are concerning: real-time system...
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