a portable and light pneumatic branch shake system was designed and manufactured in this research for harvesting fruits that can be harvested by shaking branch. required air flow and electric current are provided for operating system from category containing electrical generator and air compressor on wheelbarrows and portable chassis. vibration is equipped by programmable logic controller (plc)...

In 1948 Tellegen Philips Res. Rep. 3, 81 1948 suggested that an assembly of the lined up electric-magnetic dipole twins can construct a new type of an electromagnetic material. Until now, however, the problem of creation of the Tellegen medium is a subject of strong discussions. An elementary symmetry analysis makes questionable an idea of a simple combination of two electric and magnetic dipol...

We examine the coupling of electromagnetic waves incident normal to a thin silver film that forms an oscillatory grating embedded between two otherwise uniform, semi-infinite half spaces. Two grating structures are considered, in one of which the midpoint of the Ag film remains fixed whereas the thickness varies sinusoidally, while in the other the mid point oscillates sinusoidally whereas the ...

The electromagnetic fields far from any antenna can be conveniently described as the sum of the radiation fields of a series of oscillating point multipoles, of which the leading term is a dipole in many cases of practical interest. The form of the fields associated with the nth multipole is independent of the details of the physical layout of the antenna (other than that the layout determines ...

Mechanical rotation and oscillation have far lower frequencies than light does; thus they are not coupled to each other conventionally. In this Letter, we show the torsional mechanical of an optical cavity can be modes by introducing birefringence, which produces nondegenerate in cavity: ordinary extraordinary rays. Twisting mixes them modulates electromagnetic energy. We find optomechanical Ha...

[1] A 30-year minimum Antarctic snowmelt record occurred during austral summer 2008–2009 according to spaceborne microwave observations for 1980–2009. Strong positive phases of both the El-Niño Southern Oscillation (ENSO) and the Southern Hemisphere Annular Mode (SAM) were recorded during the months leading up to and including the 2008–2009 melt season. The 30-year record confirms that signific...

We report the results of our search for power-law electrical signals in the human brain, using subdural electrocorticographic recordings from the surface of the cortex. The power spectral density (PSD) of these signals has the power-law form P (f) ∼ f from 80 to 500 Hz. This scaling index χ = 4.0 ± 0.1 is universal, across subjects, area in the cortex, and local neural activity levels. The shap...

introduction long-term annual extreme climate events, especially temperature and precipitation, have generally been used as indicators for the assessment of climate change. one of the most changeable climatic variables in time and space is precipitation. there are great number of research papers focusing on extreme precipitation on global, regional and national scales have been written. the res...

Handling statistics forms a crucial part of any data analysis, but it is something that is somewhat neglected in our formal education, or taught more formally than practically. This lecture will try to bridge that gap, and outline the basic data analysis techniques that are most commonly used in astrophysics, including some common pitfalls and tips-of-the-trade. To focus the discussion we will ...