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Vis-a-vis the state-of-the-art we illustrate how our approach to opportunistic communications tackles the major challenges in next-generation Internet architecture.
To ascertain the possible level of risk in a digital business ecosystem interaction, the initiating agent has to determine beforehand the probability of failure, the possible consequences of failure, and the loss of investment probability to its resources while interacting with the other agent. Out of these three constituents, the initiating agent can determine beforehand the probability of failure...
We present an overview of ODDI an Ontology Driven Data Integration system based on Formal concept analysis and instance comparison. Data Integration systems are used to integrate heterogeneous data sources in a single view. Following the Global-as-View approach the data is retrieved through a common conceptualization, that in our system is modeled as an ontology. This paper focuses on the problem...
In this paper, we survey the current state-of-the-art in middleware and systems for Wireless Sensor Networks (WSN). We provide a discussion on the definition of WSN middleware, design issues associated with it, and the taxonomies commonly used to categorize it. We also present a categorization of a number of such middleware platforms, using middleware functionalities and challenges which we think...
The supply chain management business can benefit greatly from automation, as recent developments with RFID technology shows. The use of Wireless Sensor Net work technology promises to bring the next leap in effi ciency and quality of service. However, current WSN sys tem software does not yet provide the required function ality, flexibility and safety. This paper discusses a sce nario showing how...
In this paper we present a way to locate the position of a moving target on a grid plane of about 15 square meters with an estimation error of less than half of the grid node distance. The estimation method is based on the success rate that the infrared patterns transmitted from two constant positions is received by the moving target. Several aspects of the reception such as the number of the expected,...
This paper considers the design of feedforward controllers when model uncertainty is present. The main contribution is an alternative approach to the generation of the feedforward control action on the basis of the Internal Model Control formulation. This new structure allows for completely independent tuning of the feedback and feedforward controllers and provides an explicit expression for the achieved...
This paper presents a methodology for the characterization of an IEC 61499 runtime environment by use of a benchmarking procedure. Due to the usage of IEC 61499 for low-level control as well as the paradigm of application centered engineering1, it is necessary to describe the capability to execute IEC 61499 function block networks. There are two most characteristic items that need to be taken into...
A control design scheme is proposed for sloshing suppression during liquid transfer using robotic manipulators. The container of the liquid is transferred by an articulated manipulator. The motion of the liquid is approximated using the well-known pendulum-type model. The proposed control scheme combines a partial inverse dynamics controller with a PID controller tuned with a ??metaheuristic?? search...
Existing models for facilitating predictions of firms with fraudulent financial statements (FFS) are not semantics-based. The objective of this work was to design an intelligent web portal to serve as service provider for predicting which Greek manufacturing firms issue FFS. The portal serves as a meeting point among manufacturing firms, which are listed on the Athens Stock Exchange (ASE). It has...
Tourism presents quite an important industry that needs to evolve so that it confronts with the changes occurring on a global scale. In order for this to be possible a different approach should be followed regarding the provision of an integrated tourist product combining all the different characteristics of a tourist destination. Clustering of both tourist enterprises and other local enterprises...
In safety related systems online hardware self tests are integrated to reach a defined level of hardware integrity. These tests comprise testing of the static and volatile memory and the CPU internals. The higher the level of integrity should be, the more efficient tests must be used. Additionally, the effort to verify the correctness of the tests is rising. Hence, designing the test, and the validation...
Manufacturing systems are getting more and more distributed, mainly because of the growing interconnection through networks of machines, manufacturing lines, cells, plants or enterprises. Agent technology has proven to be a solution to manage distributed systems, reinforcing the importance of information and communication, and focusing attention on the interoperability between the different parts...
In this paper, we propose to improve an existing active beacon system, having the ultrasonic media type, which can be used for indoor localization; moreover, it utilizes pan-tilt mechanism for targeting the object. But it has the low sampling rate (time) and the normal accuracy (resolution) because the pan/tilt mechanism is operating and its processor is scheduling. What is more, it includes shortcoming...
The data on RFID tags placed on items must be protected to secure the privacy of that information throughout the item life cycle from production to purchase to recycling. Therefore, we propose low cost RFID tags with an access control function of using a password and a system that assigns and manages a different password for each group of RFID tags. We also explain how using the system could protect...
High accuracy 3D laser measurment systems are used in applications like inspection and Reverse Engineering (RE). With automatic RE in mind, we have designed and built a system that is based on a laser profile scanner mounted on a standard industrial robot with a turntable. This paper is concerned with the relatively complex accuracy issues of such a system. The different parts of the system are analyzed...
Ultrasound sensors, despite their low cost, are less common than other sensors used for robot localization. This is because its main drawback: The lack of reliable bearing information. We introduce a rotary ultrasonic sensor able to extract features in a 360deg-scan and classify them as wall or corner. For robot localization purposes, these features are matched with a set of line-features stored on...
Agent based systems allows to introduce additional flexibility to distributed control systems (DCS) in manufacturing. Shifting decision making processes from Enterprise Resource Planning (ERP) to the Manu- facturing Execution System (MES) allows to react in more flexible manner to changes in orders and shop floor environment. The definition of an appropriate language is vital to allow seamless and...
Distributed control systems are emerging as a solution to cope with complexity of production and lack of flexibility of the conventional centralized control system. PABADIS??PROMISE provides an architecture for an agent-based distributed control of the production on all three layers of the automation pyramid. One of the aspects of the approach is a multilevel mechanism for order decomposition that...
Sensors networks with some intelligence have been proposed for supporting mobile robot navigation systems in indoor environments. However, a standard method of communication among the sensor networks and the mobile robots still doesn??t exist and the introduction of new robots in a certain environment can be a difficult task. In this paper, we present a practical example that uses the emerging standard...
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