Search Results

You are looking at 1 - 10 of 64 items for :

  • Introductions and Overviews x
Clear All
Open access

Iwona Adamiec-Wójcik, Andrzej Nowak and Stanisław Wojciech

measurements of vibrations of collecting electrodes in dry electrostatic precipitators, Monograph (habilitation), Bielsko-Biała University Press, Poland, 2011 (in Polish). [12] Nowak A.: Numerical verification and experimental validation of the FEM model of collecting electrodes of dry electrostatic precipitators, Latin American Journal of Solids and Structures (in print) (2012). [13] Adamiec-Wójcik I.: Modelling of Systems of Collecting Electrodes of Electrostatic Precipitators by means of the Rigid Finite Element Method, The Archive of

Open access

Iwona Adamiec-Wójcik

., Taylor R. L.: The finite element method Vol 2: Solid mechanics, 5th ed. Oxford: Butterworth-Heinemann, 2000. Kruszewski J., Gawroński W., Wittbrodt E., Najbar F., Grabowski S.: Metoda sztywnych elementów skończonych. Warsaw: Arkady, 1975. Wittbrodt E., Adamiec-Wójcik I., Wojciech S.: Dynamics of flexible multibody systems: rigid finite element method, Berlin: Springer, 2006. Nowak A. P., Adamiec-Wójcik I.: Vibration analysis of collecting electrodes of precipitators by means of the hybrid

Open access

Andrea Rücker, Massimiliano Zappa, Stefan Boss and Jana von Freyberg

. Frisbee, M.D., Phillips, F.M., Campbell, A.R., Hendrickx, J.M.H., 2010. Modified passive capillary samplers for collecting samples of snowmelt infiltration for stable isotope analysis in remote, seasonally inaccessible watersheds 1: laboratory evaluation. Hydrol. Process., 24, 7, 825-833. Gröning, M., Lutz, H.O., Roller-Lutz, Z., Kralik, M., Gourcy, L., Pöltenstein, L., 2012. A simple rain collector preventing water re-evaporation dedicated for δ18O and δ2H analysis of cumulative precipitation samples. J. Hydrol., 448-449, 195-200. DOI: 10.1016/j

Open access

Iwona Adamiec-Wójcik, Andrzej Nowak and Stanisław Wojciech

References [1] Adamiec-Wójcik I., Nowak A., Wojciech S.: Comparison of methods for vibration analysis of electrostatic precipitators. Acta Mech. Sinica, 1 (Vol. 27), 2011, pp. 72-79. [2] Adamiec-Wójcik I.: Modelling of Systems of Collecting Electrodes of Electrostatic Precipitators by means of the Rigid Finite Element Method, Archive of Mechanical Engineering. Volume 58, Issue 1, pp. 27-47, DOI: 10.2478/v10180-011-0002-x [3] Adamiec-Wójcik I., Awrejcewicz J., Nowak A., Wojciech S.: Vibration Analysis of

Open access

Dorota Jarząbek and Wiesław Juszkiewicz

Abstract

The ability to use computer simulation to predict the behavior of oil spills at sea enables better use of available personnel and resources to combat such spills. The use of oil collecting equipment properly selected to suit the conditions is essential for the operation to be effective. Therefore, an attempt is made to verify the influence of weather conditions on the efficiency of oil recovery. Three types of spilled crude oil were simulated. A relevant experiment was conducted on a PISCES II oil spill simulator.

Open access

Stanislav Lichorobiec and Karla Barčová

Abstract

The premises of international airports in CR are major air transport hubs as well as key elements of critical infrastructure, belonging to the very high risk category. Any infringement leading to limitation or complete shutdown would cause considerable economic and psychological damage. The most important task is to ensure high quality and reliable physical and technical protection of the airport, because especially in the summer months these areas collect large numbers of people and a possible terrorist attack could be fatal. This paper focuses on assessing the possibilities of solving the problem of IEDs hidden in travel luggage, and their initiation by X-rays during security checks.

Open access

Barbara Tchórzewska-Cieślak and Izabela Piegdoń

Abstract

Daily exploitation of the water network, collecting of data concerning the failure of water pipes and knowledge of the repair team are the basis of the data used in the process of effectively removing and identifying failures. The paper proposes a methodology to identify the risk of failure of the water supply system that uses risk indexes according to the proposed three-stage scale of risk levels. An example of application methods for the actual operational data broken down by analysis and risk assessment for bus cables and a separate analysis for the distribution network.

Open access

Jari Koskinen, Daniel Sahebi, Hassan Nikookar and Wang Zhan

Abstract

This research is a case study research related to customer satisfaction, focuses on more effective service improvement and changes in regards with meeting the customer needs. Through empirical approach and related enterprises investigation, based on employees’ perspective and end-user’ perspective, it designs a questionnaire system to collect data. In a case company, totally 31 interviews were made from 18 subsidiaries and 13 from end customers. Finally, we use statistical analysis to analysis the collection data and draw a conclusion. The outcomes of analysis show that communication and effective information flow, as well as effective service processes are the key while technical knowhow is the basic requirements. Throughout the body of the research, we can observe that there are significant differences between the internal and external customers perspective. These differences should be taken into consideration when the service improvement is the main objective. This research helps manufacturing firms to improve their value added services in addition to operating closer to their global customers.

Open access

Olaf Büttner and Jörg Tittel

Abstract

Dissolved organic carbon (DOC) transported by rivers represents an important link between carbon pools of terrestrial and oceanic ecosystems. However, it is unclear how frequent DOC must be sampled to obtain reasonable load estimates. Here, we used continuous records of the specific UV absorption coefficient (SAC) and discharge from a headwater stream at the Ore Mountains (Germany) to calculate load errors depending on DOC sampling frequency. SAC was used as a proxy for DOC. The results show that the load was underestimated by 13-19% with monthly, 10-13% with bi-weekly and 7-9% with weekly DOC samplings, respectively. We conclude that collecting additional data from high discharge events decrease the error significantly.

Open access

Tae-Hwan Joung, Karl Sammut, Fangpo He and Seung-Keon Lee

ABSTRACT

Autonomous Underwater Vehicles (AUVs) provide a useful means of collecting detailed oceano-graphic information. The hull resistance of an AUV is an important factor in determining the power requirements and range of the vehicle. This paper describes a procedure using Computational Fluid Dynamics (CFD) for determining the hull resistance of an AUV under development, for a given propeller rotation speed and within a given range of AUV velocities. The CFD analysis results reveal the distribution of the hydrodynamic values (velocity, pressure, etc.) around the AUV hull and its ducted propeller. The paper then proceeds to present a methodology for optimizing the AUV profile in order to reduce the total resistance. This paper demonstrates that shape optimization of conceptual designs is possible using the commercial CFD package contained in Ansys™. The optimum design to minimize the drag force of the AUV was identified for a given object function and a set of constrained design parameters