Time filter

Source Type

Dzemydiene D.,Mykolas Romeris University | Dzemydiene D.,Vilnius University | Bielskis A.A.,Klaipda University | Andziulis A.,Mykolas Romeris University | And 3 more authors.
Informatica | Year: 2010

This paper analyses the possibilities of integrating different technological and knowledge representation techniques for the development of a framework for the remote control of multiple agents such as wheelchair-type robots. Large-scale multi-dimensional recognitions of emotional diagnoses of disabled persons often generate a large amount of multi-dimensional data with complex recognition mechanisms, based on the integration of different knowledge representation techniques and complex inference models. The problem is to reveal the main components of a diagnosis as well as to construct flexible decision making models. Sensors can help record primary data for monitoring objects. However the recognition of abnormal situations, clustering of emotional stages and resolutions for certain types of diagnoses is an oncoming issue for bio-robot constructors. The prediction criteria of the diagnosis of the emotional situations of disabled persons are described using knowledge based model of Petri nets. The research results present the development of multi-layered framework architecture with the integration of artificial agents for diagnosis recognition and control of further actions. The method of extension of Petri nets is introduced in the reasoning modules of robots that work in real time. The framework provides movement support for disabled individuals. The fuzzy reasoning is described by using fuzzy logical Petri nets in order to define the physiological state of disabled individuals through recognizing their emotions during their different activities. © 2010 Vilnius University.

Kozlov I.E.,Saint Petersburg State University | Kudryavtsev V.N.,Russian State Hydrometeorological University | Johannessen J.A.,Nansen Environmental and Remote Sensing Center | Johannessen J.A.,University of Bergen | And 3 more authors.
Advances in Space Research | Year: 2012

Analysis of Envisat Advanced Synthetic Aperture Radar (ASAR) and Aqua/Terra Moderate Imaging Spectrometer (MODIS) infrared (IR) imagery of coastal upwelling in the southeastern Baltic Sea is presented. It is found that upwelling features are well distinct in the SAR images, and the leading imaging mechanism appears to be the change of the marine atmospheric boundary layer (MABL) stratification over the sea surface temperature (SST) front. This finding is supported by model calculations of the MABL transformation supplemented with the SAR backscatter calculations based on the CMOD4 model. In addition an empirical dependence of the SAR contrasts over the upwelling region on the wind speed and the SST drop is suggested. Finally, surface slicks accumulated in the sea surface current convergence zones generate additional distinct features in SAR imagery. This effect is interpreted within the framework of the coastal current circulation model based on analysis of the SST snapshot. © 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.

Buynevich I.V.,Temple University | Bitinas A.,Klaipda University | Bitinas A.,Vilnius University | Damuyt A.,Lithuanian Geological Survey | Pupienis D.,Vilnius University
Eos | Year: 2010

Throughout Earth's history, tectonic forces, often violent and unpredictable, have been responsible for exposing geological formations to scientific scrutiny. But forces of uplift are not restricted to plate boundaries. For example, when looking at forested coastal dunes bordering placid Curonian Lagoon along the Lithuanian coast of the Baltic Sea, one hardly suspects that any powerful forces are at work. Yet this is a site where massive migrating hills of sand have put pressure on the deep strata of the ancient lagoon, forcing its sediments to the surface and offering rare access to fossils of the Holocene, which spans the past 10,000 years.

Andziulis A.,Klaipda University | Pltys R.,Kaunas University of Technology | Jakovlev S.,Klaipda University | Adomaitis D.,Kaunas University of Technology | And 3 more authors.
Transport | Year: 2012

Intermodal containers transportation management has always been a serious issue among logistics worldwide companies where the application of secure mobile information technologies (e.g. radio frequency identification systems (RFID) and sensor networks) could significantly improve the current situation by sending managers all the needed transportation conditions information. In this paper, we have focused on improving managerial decision making method by introducing the expert system evaluation functionality in a common software solution CTRMS for additional ICT risks evaluation. The basic risks involved in transportation and the appropriate measures are introduced as well. The pre-defined RFID sensor network was used to develop an optimal tag authentication and routing algorithm where tags and reader authentication protocols were defined and based upon the highest security assurance and the reader to tag response time criterias. A Nearest Neighbor (NN) heuristic approach and a Priority setting method were used to address the problem of routing within the RFID sensor network between tags with the objective function of minimizing the data transfer time between tags with the highest priority values. Computational results also indicate that when the tags have the same level of confidence in the system, they can exchange information without any additional verification, so making the authentication protocol less time consuming and therefore more effective against other proposed protocols. © 2012 Vilnius Gediminas Technical University (VGTU) Press Technika.

Paulauskas V.,Klaipda University | Lukauskas V.,Klaipda University | Plaiene B.,Klaipda University | Barzdiukas R.,Klaipda University
Transport | Year: 2012

Emergency conditions in a port request special precaution measures taken by ships when in the majority of cases they necessitate leaving port waters in the shortest time. Good management, awareness and timely actions can help with avoiding difficulties encountered by ships under emergency conditions at ports. The conducted research suggested in the article has been based on investigation into ship maneuverability considering complicated weather conditions, theoretical methods for the feasibility of ship maneuverability referring to difficult conditions, experimental tests using the calibrated Simulator and evaluation of real ships under similar conditions. The results of the presented research could be used for analyzing the situation in different ports with different ships regarding practical preparation for vessels to leave the port under emergency conditions without any delay. © 2012 Vilnius Gediminas Technical University (VGTU) Press Technika.

Loading Klaipda University collaborators
Loading Klaipda University collaborators