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Access status: Open Access ,
Artificial intelligence techniques in real-time robust route planning
(2007-09-27) (Data obrony: 2010) Ernst, Sebastian
Wydział Elektrotechniki, Automatyki, Informatyki i Elektroniki
Usability of satellite navigation devices deteriorates drastically when the driver encounters an obstacle or makes a mistake. This is because applications used for satellite navigation are designed as decision-making systems, not decision-support systems. This is caused by using a classical approach to route planning, based on path search in a graph representing the road network. If perturbations occur during execution of a plan, it is necessary to repeat the planning procedure with updated constraints. Unfortunately, mobile devices have limited processing power, making the task time-consuming and difficult. To provide practical support for the driver in the decision-making process and give them free choice among available options, route planning should be performed in a multi-variant manner. Delivery of instructions to the driver is subject to hard real-time constraints - instructions regarding a manoeuvre at a certain junctions delivered after the car has reached it are useless. The thesis presents a solution to the problem of efficient generation, representation and execution of route plans in dynamic environments by intelligent beings. The suggested approach allows for efficient a priori generation of multi-variant plans and flexible navigation in unpredictable environments.
Access status: Open Access ,
Evaluation of a dynamic map architecture with ATAM
(Wydawnictwa AGH, 2013) Szwed, Piotr; Wojnicki, Igor; Ernst, Sebastian; Głowacz, Andrzej
Mapa dynamiczna jest złożonym systemem informatycznym składającym się z przestrzennych baz danych przechowujących statyczne i dynamiczne informacje dotyczące ruchu drogowego oraz modułów oprogramowania odpowiedzialnych za zbieranie danych, ich interpretację oraz udostępnianie. Dane monitorowania pochodzą z sieci czujników, zarówno stałych, w tym detektory wideo, czujniki akustyczne i pętle indukcyjne, jak i odbiorników GPS zainstalowanych w pojazdach. Klientami mapy dynamicznej są systemy odpowiedzialne za wizualizację, planowanie trasy, śledzenie obiektów oraz wykrywanie zagrożeń. W artykule omówiono doświadczenia zebrane podczas przeprowadzonej oceny architektury z wykorzystaniem metody ATAM. Etapy oceny obejmują opis architektury, identyfikację kluczowych scenariuszy oraz ocenę ryzyka ich realizacji.
Access status: Open Access ,
A conceptual model for web knowledge acquisition system with GIS component
(Wydawnictwa AGH, 2009) Ligęza, Antoni; Ernst, Sebastian; Nalepa, Grzegorz Jacek; Szpyrka, Marcin
Building efficient tools for supporting Knowledge Acquisition and Knowledge Management is a challenge and hot research topic with potentially infinite numbers of applications. In modern computer science, the web technologies open a completely new chances for massive, distributed knowledge acquisition. Examples of such social phenomena as Wikipedia constitute a working proof of high potentials incorporated in the synergy of human and web interaction. This paper discusses certain issues concerning the conceptual model for a distributed knowledge acquisition system gathering and organizing knowledge on threats of various nature and aimed at improving safety of citizens in urban environments. The system for registering citizen-provided information is a part of the INDECT FP7 Project. Contemporary tools and techniques to be applied, including GIS technologies and Semantic Wikis are presented in brief and future problems to be solved are identified.

Ernst, Sebastian

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