Conventional Polaroid time-of-flight (TOF) sonars provide object range measurements, but their wide beam widths limit the object bearing accuracy. We describe a first-order model that predicts the TOF readings from an object at given range, bearing, and reflecting strength produced by the Polaroid 6500 series sonar ranging module connected to a 600 series electrostatic transducer. The model pro...

A com m on assumption o f rem ote sensing-based ligh t use efficiency (LUE) models fo r estimating vegetation gross primary productiv ity (GPP) is tha t plants in a b iom e m atrix operate at the ir photosynthetic capacity under optim a l c iim aticcond itions. A prescribed constant b iom e m axim um ligh t use efficiency parameter (LUEmax) defines the m axim um photosynthetic carbon conversion...

background & aim: in this study, is done during one-year research on blue–green and green algae for antimicrobial activity in mashhad suburb. aqueous, ether, and methanol extracts from 44 species blue – green algae and green algae were examined for antimicrobial properties against four bacteria (tow positive gram bacteria and tow negative gram bacteria) and tow fungous. material & meth...

Self-excited vibration of the tool, regenerative chatter, can be predicted and eliminated if the stability lobe diagram of the spindle–holder–tool assembly is known. Regardless of the approach being used, analytically or numerically, forming the stability lobe diagram of an assembly implies knowing the point frequency response function (FRF) in receptance form at the tool tip. In this paper, it...

The paper deals with monitoring and analyzing the indoor environmental parameters through remote data collection to evaluate pollution moisture infiltration effects on aircraft heritage conservation. First, based meteorological data, penetration airborne into spaces of a site (hangar) stored historic aircrafts are determined. hangar under investigation is located in Aviation museum Kbely, Pragu...