نتایج جستجو برای: change of direction
تعداد نتایج: 21212677 فیلتر نتایج به سال:
A new dynamic friction model for modeling of elliptical vibration assisted turning (EVAT) was developed in this research. The periodic change of the friction force direction is known to be one of the most important causes of this phenomenon. In modeling of machining processes (including the EVAT process), static Coulomb friction model was employed by most of the researchers. Because of the peri...
The paper presents a case study in the compositionality of particle-motionverbs. Part of the investigation is the interaction between indexical elements contributed by hin(there, thither) vs. her(here, hither) and the deictic motion verbs kommen (come) vs. gehen (go). The investigation will lead to a distinction between the notion indexical in the sense of ’direct reference to the utterance sit...
in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...
in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...
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