Papers by Tomas Nestorovic
Nowadays, electric power systems have been often operated close to their feasible limits due to i... more Nowadays, electric power systems have been often operated close to their feasible limits due to increased electric power consumptions, large installments of renewable power sources, and deliberated power market policies. These pose a serious threat to stable network operation and control. Therefore, both static and dynamic voltage stabilities are currently one of the key topics worldwide for preventing related black-out and islanding scenarios. In this paper, modelling and simulations of static voltage stability problems in MATLAB environment are performed using author-developed computational tool implementing both conventional and more advanced numerical approaches. Their performances are compared with Simulink-based library Power System Analysis Toolbox (PSAT) in terms of solution accuracy, CPU time and possible limitations. Furthermore, their use for locating critical network buses/branches/areas and most critical loading scenarios in terms of voltage stability are demonstrated. ...
AbstrAct: This paper focuses our agent-based approach to dialogue management equipped with a deli... more AbstrAct: This paper focuses our agent-based approach to dialogue management equipped with a deliberation mechanism further extensible with additional features. The aim of this study has been to create a manager which can exhibit complex behaviour from two points of view – the development and runtime ones. To support the first case, the domain developer needs to provide a set of plans which tell the agent how to cope with particular tasks. Then during the runtime, the agent processes these plans to manage the dialogu e in accordance with an optimization criterion specified. This paper summarizes our effort and gives an overview about our architecture.
DAAAM Proceedings, 2011
This paper concerns development towards a method for measuring values of radiant norm around huma... more This paper concerns development towards a method for measuring values of radiant norm around humans' head. This norm is important for radiant heating and thermal comfort in the sense of avoiding headaches and overheating as a result of a long-term heat exposure
Designing a Personal Assistance Application Using Wizard of Oz Methodology
DAAAM Proceedings, 2011
On designing an experimental navigation system
Proceedings of the 14th Wseas International Conference on Systems Part of the 14th Wseas Cscc Multiconference Volume Ii, Jul 22, 2010
This paper presents our recent work in car navigation system design and experience. We designed a... more This paper presents our recent work in car navigation system design and experience. We designed a multimodal dialogue system emulating a navigation system and its functionality, and conducted tests on N=11 volunteers. Below, results achieved are presented and discussed.
Lecture Notes in Computer Science, 2010
This paper focuses on our recent work in frame-based dialogue management. Despite frames are freq... more This paper focuses on our recent work in frame-based dialogue management. Despite frames are frequently used in commercial speech applications, they lack enough automation for error recovery within a dialogue. In this paper we present and demonstrate our mechanism that fills this gap by automatically tracking and managing the dialogue flow causality.
Advances in Artificial Intelligence, 2010
In this paper, we focus on our agent-based approach to task-oriented dialogue management. We pres... more In this paper, we focus on our agent-based approach to task-oriented dialogue management. We present our deliberation process based on optimizing the length of a dialogue. As innovative features, the manager accommodates the "lounge mode" for passing all initiative back to the user within a single dialogue turn, and a two-layered structure for representing the dialogue context. At the end of the paper, we suggest future extensions to the architecture.
A frame-based dialogue management approach
2009 Second International Conference on the Applications of Digital Information and Web Technologies, 2009
This paper is focused on our approach to hierarchical frame-based dialogue management. As we show... more This paper is focused on our approach to hierarchical frame-based dialogue management. As we show, even when dealing with this simple technique, the manager exhibits complex skills, as for example acceptance of references to historical entities or maintenance of context causality (by utilizing application of a journaling system). Our research goal is to create a generic and easy-to-use manager. At the end of this paper, future work is outlined, as the manager is still under development.
Towards Flexible Dialogue Management Using Frames
Lecture Notes in Computer Science, 2009
This article is focused on our approach to a dialogue management using frames. As we show, even w... more This article is focused on our approach to a dialogue management using frames. As we show, even when dealing with this simple technique, the manager is able to provide a complex behaviour, as for example maintenance of context causality. Our research goal is to create a domain-independent dialogue manager accompanied with an easy-to-use dialogue flow editor. At the end of this paper, future work is outlined, as the manager is still under development.
Modified Conversational Agent Architecture
2013 IEEE 25th International Conference on Tools with Artificial Intelligence, 2013
This paper concerns a BDI agent-based dialog management with innovated approaches to Beliefs and ... more This paper concerns a BDI agent-based dialog management with innovated approaches to Beliefs and Intentions components. We show that these modifications lead to approximately 5 % improvement in terms of information exchange rate.
General agent-based architecture for collaborative dialogue management
2010 2nd International Conference on Software Technology and Engineering, 2010
In this paper, we focus on our agent-based approach to task-oriented dialogue management. We pres... more In this paper, we focus on our agent-based approach to task-oriented dialogue management. We present our deliberation process based on optimizing the length of dialogue. As an uncommon feature, the manager accommodates a two-layered structure for representing the dialogue context, i.e., user's intentions detection and beliefs management. At the end of the paper, we suggest future extensions to the architecture.
Applying Rogerian Psychologist in Human-Computer Interaction: A Case Study
Lecture Notes in Computer Science, 2013
This paper concerns a design, application, and testing of a Rogerian psychologist strategy for in... more This paper concerns a design, application, and testing of a Rogerian psychologist strategy for information elicitation in dialogue management. Our results show that keeping the initiative in dialogue at users’ side as long as they know what to say improves information exchange rate by 37.5 %. We also discuss applicability and implications for other domains.
Expert Systems with Applications, 2012
In this paper, we focus on an agent-based architecture for task-oriented dialogue management. We ... more In this paper, we focus on an agent-based architecture for task-oriented dialogue management. We present our deliberation process based on optimizing the length of a dialogue in terms of its turns needed to accomplish a task. As innovative features, the manager accommodates a ''lounge strategy'' for passing initiative back to the user, and a two-layered structure for dialogue context representation. We show that applying the lounge strategy during a dialogue leads to improving the information exchange rate by approximately 5% compared to ''common'' dialogue strategies alternative. Furthermore, we present two of our dialogues and analyze them with respect to the agent description. At the end of the paper, we suggest future extensions and modifications to the architecture, and conclude.
International Journal of Energy, 2021
Nowadays, electric power systems have been often operated close to their limits due to increased ... more Nowadays, electric power systems have been often operated close to their limits due to increased electric power consumptions, vast installments of renewable power sources and deliberated power market policies. This poses a serious threat to stable network operation and control. Therefore, voltage stability is currently one of key topics worldwide for preventing related black-out and islanding scenarios. In this paper, modelling and simulations of steady-state voltage stability problems in MATLAB environment are performed using author-developed computational tool implementing both conventional and more advanced numerical approaches. Their performance is compared with Simulink-based library Power System Analysis Toolbox (PSAT) in terms of solution accuracy, CPU time, and possible limitations. Their use for both real-time and off-line monitoring and assessment of system's voltage stability are also discussed.
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Papers by Tomas Nestorovic