Gdynia, Poland
Gdynia, Poland

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Biniak S.,Nicolaus Copernicus University | Trykowski G.,Nicolaus Copernicus University | Pakula M.,Naval Academy of Gdynia | Swiatkowski A.,Military University of Technology | And 2 more authors.
Adsorption Science and Technology | Year: 2010

The results of treating commercial granulated activated carbons with ozone, both gaseous and dissolved in water, were analyzed. The original carbons (Filtrasorb-300 and Carbsorb-38) were carefully flushed with distilled water to remove any water-soluble impurities. For comparison, each of the washed activated carbons was treated separately with aqueous hydrogen peroxide. The following procedures were applied to assess the effects of contact between each carbon and the oxidizing agents: thermogravimetry, alkalimetry, voltammetry, EDX and FT-IR methods to illustrate changes in the surface chemistry, and nitrogen low-temperature adsorption to show up any possible changes in the porous structure. Ozone dissolved in water exhibited the lowest oxidative strength - EDX and FT-IR spectroscopy revealed only a slight oxidation of the Filtrasorb-300 surface layer. Despite its smaller specific area, this carbon surface exhibited greater roughness and was more susceptible to oxidation. The liquid-phase adsorption isotherms of p-chlorophenol from aqueous solution onto this carbon showed that surface oxygen reduced the extent of adsorption. The experimental data were best fitted by the Langmuir isotherm model.


Balicki J.,Technical University of Gdansk | Drozda G.,Atena | Jan M.,Naval Academy of Gdynia
Recent Advances in Applied and Biomedical Informatics and Computational Engineering in Systems Applications - AIC'11, BEBI'11 | Year: 2011

Multi-criterion, evolutionary and quantum decision making supported by the Adaptive Quantum-based Multi-criterion Evolutionary Algorithm (AQMEA) has been considered for distributed complex systems. AQMEA had been developed to the task assignment problem, and then it has been applied to underwater vehicle planning as another benchmark three-criterion optimization problem. For evaluation of a vehicle trajectory three criteria have been used.


Specht C.,Maritime Academy of Gdynia | Koc W.,Technical University of Gdansk | Smolarek L.,Maritime Academy of Gdynia | Grzadziela A.,Naval Academy of Gdynia | And 2 more authors.
Journal of Vibroengineering | Year: 2014

Satellite geodetic measurements used in the diagnosis of railway tracks require professional receivers and a very high frequency rate of data processing. It stems from a significant speed (10 km/h) kinematic measurements carried out during the passage of a measuring platform. The survey results (positions) of deformed railroad track have waveforms nature requiring additional processing methods and approximations. Due to the announcement in 2011 of the operating status for the Russian Global Navigation System (Glonass) and launching a commercial geodetic satellite network SmartNet in northern Poland (2012) created for the first time a possibility of carrying out measurements using two satellite systems (GPS/GLONASS) which significantly increase the accuracy of measurements on a rail. A paper presents a possibility of using two-system satellite receivers to measure the deformationof the tram track on the example of the measurement line in Gdansk (October 2013). The studies used rarely encountered in geodesy a very high position frequency rate (20 Hz), which entails the use of wave processing methods. © JVE INTERNATIONAL LTD. JOURNAL OF VIBROENGINEERING 2014.


Kozaczka E.,Technical University of Gdansk | Domagalski J.,Naval Academy of Gdynia | Gloza I.,Naval Academy of Gdynia
Polish Maritime Research | Year: 2010

This paper presents results of research on spectral structure of underwater noise acoustic field radiated into water by selected ships moving in shallow waters. Underwater acoustic field of ships in motion is associated with acoustic activity of ship mechanisms and equipment under work. Vibration energy radiated by the mechanisms and devices is transmitted by ship structural elements to surrounding water where it is propagated in the form of acoustic waves of a wide frequency band. In this paper are presented results of the research on propagation of energy of acoustic waves in the near fiel, obtained from acoustic pressure measurements by means of two sensors located close to each other.


Kozaczka E.,University of Technology and Life Sciences in Bydgoszcz | Domagalski J.,Naval Academy of Gdynia
Polish Maritime Research | Year: 2010

This paper deals with results of identification tests of acoustic field spectrum of underwater noise generated by ship in motion. The field is connected with acoustic activity of ship mechanisms and devices in operation. Vibration energy generated by the mechanisms and devices is transferred through ship structural elements to surrounding water where it propagates in the form of acoustic waves of a broad band of frequencies. In the publication results of identification tests of underwater noise generated by a ship in motion, are presented.

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