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Virus penetration is a significant problem in water treatment membrane filtration. To effectively remove waterborne viruses nano-filtration, reverse osmosis or ultrafiltration must be used, all of which are high energy filtration schemes. Novel approaches and technologies for the production of virus-free drinking water are therefore warranted. In this study, we modified model surfaces and commercial...
The impact of rotor yaw angle on the diffraction loss of a radar beam due to scattering at a 3-blade rotor of a wind turbine (WT) is investigated. Simulation results for a C-band weather radar are based on 2D Fresnel-Kirchhoff diffraction approach considering negligible impact of the ground plane.
Offshore wind turbines (WT) can cause wrong estimation of radial speed of nautical traffic by marine radar. The error in measured radial speed due to rotor forward scattering is investigated for S band radar using Fresnel-Kirchhoff diffraction approach. Based on the insight into Fresnel zone shading a scenario with high impact of rotor forward scattering on the Doppler error is selected. Deviation...
2D Fresnel-Kirchhoff diffraction approach is used to study the impact of blade shape and pitch angle on the diffraction loss of a 3-blade rotor of a wind turbine (WT) considering negligible impact of the ground plane (radar beam). The projection of the blade into the rotor plane (2D approximation) is depending on pitch angle and, thus, varying with wind speed. Results obtained for different blade...
Rotor angle dependent amplitude and phase distortion of a radio signal is calculated using 2D Fresnel-Kirchhoff diffraction approach and verified by numerical field simulation using Uniform Theory of Diffraction (UTD). The corresponding instantaneous Modulation Error Ratio (MER) and raw data Bit Error Rate (BER) are investigated considering a 16-QAM system. Time-variant channel impulse response cannot...
Mitigation of wind turbine (WT) forward scattering for radar and communication systems requires a comprehensive understanding of the impact of diffraction of radio and radar signals at a WT. Investigation of a large variety of diffraction scenarios demands a fast and profound calculation method. Time-variant diffraction loss of the forward scattered signal is calculated using 2D Fresnel-Kirchhoff...
Mitigation of the impact of wind turbine (WT) forward scattering on radars, navigation systems and terrestrial radio links requires accurate modelling and rapid calculation of diffraction of RF and microwave signals at the tower and rotor of WTs. A proper analysis by 3D numerical field simulation is very time consuming as the problem is electrically extremely large. We are using 2D Fresnel-Kirchhoff...
Coexistence of wind farms and terrestrial radio links require the investigation of suitable exclusion zones. A proper analysis of this interference including the effect of diffraction is very difficult by numerical field simulation as the problem is electrically extremely large. We propose and analyze a simple diffraction model for a wind turbine (WT) based on a one-dimensional Fresnel diffraction...
Sun Q, Yang X, Asim MBR, Jiao F, He X, Zhong B, Li D, Lu S. Different challenge terms determine disease patterns of antigen‐induced pulmonary inflammation in E3 rats. APMIS 2011; 119: 229–38.
Antigen induced pulmonary inflammation (AIPI) in rats, a classic animal model for asthma, has greatly contributed to the understanding of the disease pathogenesis, especially for the inflammation process. E3...
Developing software for high-dependable space applications and systems is a formidable task. With new political and market pressures on the space industry to deliver more software at a lower cost, optimization of their methods and standards need to be investigated. The industry has to follow standards that strictly set quality goals and prescribes engineering processes and methods to fulfill them...
One of the primary uses of computer is to reduce cost and manage complexity with increase in efficiency and performance. Now system complexity is reaching a level that is beyond human ability. With the development of technology, people want to manage complex systems in an efficient and reliable manner. Development of raw computing power and proliferation of computer devices and usage of internet has...
Functionality, complexity, heterogeneity and dynamism in computing environment are increasing day by day. This enhanced utility of computers has a profound impact on the systempsilas brittleness, manageability and security. Self-management is important in systems, networks, communication as well as in Database Management Systems (DBMSs). Autonomic computing reduces the problems and increases accuracy...
With the growing size of enterprise data, the task of managing a database is becoming more and more complex as well as time-consuming. A database administrator spends most of his time in activities that can be made automatic. Also, scarcity of skilled database administrators have motivated the database industry to develop autonomic database management systems (ADBMS) which can alleviate many of the...
REBIC is a powerful technique for the study of defects, especially grain boundaries (GBs), in ill developed, high-resistivity (semi-insulating) materials. Ideas for modelling GB REBIC contrast have been proposed but neither quantitatively developed nor applied to details of experimental contrast. The model of two Schottky barriers back to back for charged boundary (peak and trough) contrast and the...
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