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This study investigates the challenges and opportunities presented by downwind wind turbines and offers a roadmap of future research pathways to maximize their potential. Multidisciplinary design, analysis, and optimization comparison studies between upwind and downwind configurations on a modern 10‐MW offshore wind turbine are presented to support the discussion. On one hand, the downwind rotor is...
The purpose of this work is design an energy-efficient LED lamp suitable for investigations in greenhouse production. The spectral characteristics of the lamp are consistent with the results of the latest research in this area. Possibilities for independent stepless control of the radiation's intensity in the different spectral areas are realized. The distribution of the irradiance in the processing...
In the present study a method for managing therapeutic purposes LED lamp is shown. The main goal is to facilitate the potential user (e.g. medical practitioner) in configuring appropriate parameters such as correlated color temperature (CCT) and luminous flux in a relevant room (as facility for senior citizens). The controlled LED lamp consists of 2 independent channels — the first includes 2 white...
Related to different international activities in the Optical Wireless Communications (OWC) field Graz University of Technology (TUG) has high experience on developing different high data rate transmission systems and is well known for measurements and analysis of the OWC-channel. In this paper, a novel approach for testing Free Space Optical (FSO) systems in a controlled laboratory condition is proposed...
A novel approach for testing Free Space Optical (FSO) systems in a controlled laboratory condition is proposed. Based on fibre optics technology, our testbed could effectively emulate the operation of real wireless optical communication systems combined with various atmospheric perturbation effects such as fog and clouds. The suggested architecture applies an optical variable attenuator as a main...
The field of Free Space Optical (FSO) communications has to deal with several challenges, which have to be considered. One of the most serious amongst them is fog attenuation. In this paper, an effective method for investigation of a long-distant FSO system's performance in the presence of fog is described. The proposed hardware channel emulator for laboratory measurements is based on a controllable...
Investigations in this work are connected with the design and thermal management of LED lamp with spectral characteristics suitable for dairy barns. Spectral power distribution (SPD), optimal for dairy cows is achieved by combinations of LEDs with different spectral characteristics and the control of the LEDs' operation. The thermal management theoretical calculations and the heat sink choice are...
This paper is presenting the simulation of fiber taper. A travelling burner tapering system which implements the ‘flame-brush’ technique is selected for the fiber tapering. The important parameters that control the shape of fiber taper and the related mathematical equation for shaping the fiber taper were understood and then transformed into software codes for further simulation. Both Forward and...
Introduction Variations in glenoid morphology among patients of different gender, body habitus, and ethnicity have been of interest for surgeons. Understanding these anatomical variations is a critical step in restoring normal glenohumeral structure during shoulder reconstruction surgery. Methods Retrospective review of 108 patient shoulder CT scans was performed and glenoid version, AP diameter...
The performance of a Free Space Optical (FSO) communication system is highly dependent on the precise selection and adjustment of its operation parameters. The appropriate determination of the angle of divergence can noticeably compensate the negative impact of deviations of the optical beam from its main direction caused by a variety of deteriorative influences. Mathematical equations for calculating...
This paper outlines the possibilities to apply sensors and microsystems to improve efficiency and service life durability of LED lighting equipment. An electronic control microsystem is presented. Using sensors of motion, fog, diode temperature, lamp temperature, outdoor temperature and light [1], the performance, operational reliability and durability of this type of lighting equipment designed both...
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