An ITQ system that relies on a single price to allocate harvest rights will not be fully efficient unless the stock in question is uniform in terms of its economic value. Variations in the location or density of portions of a stock can give rise to corresponding variations in value, leading harvesters to compete for the best portions of the stock. The size of the waste that can arise from this ...

The incidence of respiratory symptoms caused by grain dust during harvesting was surveyed in a group of Lincolnshire farmers. A quarter complained of respiratory distress after working on combine harvesters or near grain driers and elevators, with cough, wheezing, and breathlessness, sometimes so severe as to prevent work. The airborne dust around combine harvesters contained up to 200 million ...

This paper presents, for the first time, experimental results demonstrating a new approach to increasing the power output of piezoelectric energy harvesters by applying a bias charge at the beginning of each half cycle of motion. Ultimate power limits of inertial energy harvesters depend only on the device size and nature of the excitation, rather than on the transduction mechanism. However, pr...

The aim of this paper is a comparison of the operating parameters of combine harvesters on a selected farm. The working parameters were measured and evaluated on combine harvesters of the CLAAS and CASE IH brand by different ages and different concepts of threshing. Measuring took place in the season of 2013 and 2014 (Lexion 770 in 2012 too). Working parameters in this case mean the performance...

MEMS energy harvesters are attracting researchers’ attentions from both academia and industries for the self-powering of sensing systems in vehicular applications. The possibility to convert the power contained in the mechanical vibrations into electrical power offers the possibility to replace traditional wired sensors with wireless devices, to simplify the on-board architecture, increase main...

Energy harvesting systems such as self-powered wireless sensor nodes rely on a diverse set of energy sources in their continuously changing environment for power. A highly flexible power supply with multiple sources is needed to deal with large variation in environmental conditions. This paper describes an integrated power management system for use with multiple energy harvesters, which employs...

Energy harvesting is an emerging technology with applications to handheld, portable and implantable electronics. Harvesting ambient vibration energy through piezoelectric (PE) means is a popular energy harvesting technique that can potentially supply 10 to 100’s of μW of available power [1]. One of the limitations of existing PE harvesters is in their interface circuitry. Commonly used full-bri...

This paper describes shoe-mounted piezoelectric vibration energy harvesters (PVEHs). The PVEHs were fabricated from Pb(ZrTi)O3 (PZT) thin films which were directly deposited onto Pt/Ti-coated stainless steel foil by rf-magnetron sputtering. We experimentally and theoretically evaluated impulse responses of the PVEHs by applying a simple impulse input on the energy harvesters, typical damped fre...

Energy harvesting is an emerging technology with applications to handheld, portable, and implantable electronics. Harvesting ambient vibration energy through piezoelectric (PE) means is a popular energy-harvesting technique that can potentially supply 10’s-100’s of μW of available power [1]. One of the limitations of existing PE-harvesters is in their interface circuitry. Commonly used full-bri...

Unsolicited commercial emails (UCE, spam) are currently being fought using reactive methods, filtering being the most common. Reacting means to be always one step behind. So the focus on fighting spam should be on prevention. Current proposals focus on fixing SMTP's lack of authentication, but introduce two major problems: First of all current attempts break existing functionality and, second, ...