We propose a tractor atom interferometer (TAI) based on three-dimensional (3D) confinement and transport of split atomic wavefunction components in potential wells that follow programmed paths. The paths are to recombine wavefunctions at well-defined space-time points, guaranteeing closure the interferometer. Uninterrupted 3D interfering eliminates coherence loss due wavepacket dispersion. Usin...

The objective of this study is to reach a better understanding of accidents on Swedish roads involving tractors and to suggest ways of preventing them. In an earlier study we analyzed police-reported fatal accidents and accidents that led to physical injuries from 1992 to 2005. During each year of this period, tractors were involved in 128 traffic accidents on average, an average of 7 people we...

This is an outline of my lecture at the Hayama Symposium on several complex variables on December 21, 2002. The subject of the talk are new applications of the canonical Cartan connection for CR manifolds. Most of the results I will report on are based on joint research (partly in progress) with A.R. Gover and with J. Slovák and V. Souček. Partly, these results are specific for the class of CR ...

In a typical automatic guidance system for agricultural machines, the guidance system controls only one degree of freedom; either the steering angle of the front wheels of the tractor or other steering equipment is used for steering. In a tractor with the multiple degrees of freedom, like four wheel steering, the guidance system may use both the degrees of freedom for path tracking. However, th...

it is very important to test and evaluate the performance and ability of new-design machinery in comparison with available ones. based on this, a tractor front-mounted rice reaper was compared and evaluated with tiller- mounted and self-propelled reapers. field experiments were conducted to determine forward speed, field capacity, harvesting losses, labor and costs. experiments were conducted b...

Based on the analysis of operating conditions tractor, a Hybrid four-wheel drive tractor is proposed, and formulate torque distribution control strategy based fuzzy control, to driving wheel slip rate in high traction efficiency range tractor. The vehicle model established AVL-CRUISE software, MATLAB/Simulink software. co-simulation was carried out plowing condition simulation results show that...