Novel mass air flow meter for automobile industry based on thermal flow microsensor. I. Analytical model and microsensor

An analytical model of the thermal flow sensor has been developed. The results of analytical model application are utilized to develop a thermal flow microsensor with optimal functional characteristics. The technology to manufacture the microsensor is described. A prototype of the microsensor suitable to be used in the mass air flow meter has been designed. The basic characteristics of the microsensor are presented. © 2013 Elsevier Ltd

Liquid flow meter based on a thermal anemometer microsensor

An analytical model of a thermal anemometer sensor is developed. A thermal anemometer microsensor utilizing doped polycrystalline silicon is created. A liquid flow meter prototype based on a thermal anemometer microsensor is designed. Results of the flow meter testing are presented. © 2016

Black Holes of a Minimal Size in String Gravity

A lower limit for a neutral black hole size is obtained in the frames of the string gravity model with the second order curvature correction. It is shown that this effect remains when the third order curvature correction is also taken into account and argued that such restriction does exist in all perturbative orders of curvature expansions.Comment: 6 LaTeX pages, 1 PostScript figure (epsfig.sty), minor changes in the text and references, submitted to Int.J.Mod.Phy

Separation of the Galactic Synchrotron Foreground and the CMB Polarization Measurements

The polarization of the CMBR represents a powerful test for modern cosmology. It allows to break the degeneracy of fundamental cosmological parameters, and also to observe the contribution of gravitational waves background to the CMBR anisotropy. To observe the CMBR polarization several experiments are either in progress or planned and SPOrt is one of the most promising planned by ESA. At the same time the observation of the CMBR polarization is a difficult task and one of the reasons is the presence of polarized foreground emission. For instance, galactic polarized synchrotron emission (according to some estimates) can completely mimic the polarization of the CMBR. Nevertheless, one can use mathematical properties of the spherical harmonics of the distribution of radiation over the sky to separate different contributions. In this paper the mathematical properties of the polarized synchrotron foreground and the physical mechanism that produces it are discussed. The separation of synchrotron polarization from the polarization generated by density cosmological perturbations is discussed as well.Comment: 10 LaTeX pages, acceptted to AIP Conference Proceedin

Loop Heat Pipes with a Steam Jet Pump

Some configurations of cooling systems based on two-phase loops with control of the fl ow rate of the liquid and steam in them as well as experimental data obtained with these systems are presented. A model of an ejector-assisted loop heat pipe has been developed, and the results of calculations with it were compared with the corresponding experimental data. © 2020, Springer Science+Business Media, LLC, part of Springer Nature