Today in most cases rolling bearings of high-speed spindles of machine tools are lubricated with grease or oil. The practicable advantages of the oil minimum quantity lubrication cannot be used completely, because there is a deficiency of knowledge concerning the motion of oil in the bearing. At the IWF layers of oil on the surface of ball bearings...
Current high-speed videoendoscopy (HSV) make it possible to obtain 4000 images of the larynx per second. By this process, the analysis of the vocal folds can provide significant information. This is also possible to estimate the area of the glottis. All this information is useful for the study of the various phonatory modes, but also for glottal fl...
Image rendering of spatial light modulators (SLMs) is often degraded by various effects. Some efficient methods to get around nonuniformity, nonlinearity, and remanence and improve image rendering are presented. Optical laboratory results are presented for an analog ferroelectric liquid-crystal SLM using a high-speed camera. Focus is made on a prep...
This paper deals with the three-dimensional computer simulation of the weft insertion process as a possible solution to avoid costly weaving trials when researching this process. A three-dimensional mathematical model of the yarn was developed, in which the behavior of the yarn was described by the Second Law of Newton. For this mathematical model,...
A novel VHF-CCP was developed for sterilization and decontamination of medical instruments. The sterilization process is a two-step process: at first, an evaporated liquid is set into the chamber, e.g. water. Afterwards, plasma is ignited either solely with the remaining water vapor or with hydrogen gas in addition. As a "proof-of-concept", microbi...
Nordic Pulp and Paper Research Journal Vol.26 Nr.3, 288 - 296
Published in Science China Technological Sciences
In the present study, firstly, the unsteady cavitating flows around a hydrofoil are studied based on the flow visualization and detail velocity measurement, a high-speed video camera is used to visualize the flow structures, and a particle image velocimetry (PIV) technique is applied to the measurement of the time-averaged and instantaneous velocit...
Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2011 / Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2011 / Lif söz konusu olduğunda ‘nano’ terimi, lif inceliği hakkında bilgi verir. Bazı araştırmacılar çapı bir mikronun altındaki liflere nanolif derken, diğerleri ise nanolif içi...
Recently, the study and the development of a new measurement method that uses optical sensing of the sampling moire method, the digital holography method, the digital image correlation method, and the infrared method, etc. are done. In this study, the dynamic displacement measurement of the aluminum specimens by the digital image correlation method...
Improving the cutting processes by optimizing operating parameters necessarily involves understanding the thermo-mechanical mechanisms generated during chip formation. For this, numerical simulations are used to obtain the strain, stress and thermal fields near the tool tip. Nowadays, the validation of numerical simulation models of cutting is base...
