The paper deals with the characteristics of three different types power train hybridization forest logging machines and benefits reducing environmental impacts by comparing new technology more conventional, older technology. New options that could be implemented in forestry are also discussed. divides a hybrid solution into classes based on energy used system hybridization. First is an electro-...

Hydraulic power take-off (HPTO) is considered to be one of the most effective schemes for wave energy conversion systems (WECs). The HPTO unit can constructed using standard hydraulic components that are readily available from industry market. However, construction and operation more complex rather than other types take-off, as many parameters need during optimization. Generator damping, motor ...

Cryptographic accumulators are a tool for compact set representation and secure set membership proofs. When an element is added to a set by means of an accumulator, a membership witness is generated. This witness can later be used to prove the membership of the element. Typically, the membership witness has to be synchronized with the accumulator value: it has to be updated every time another e...

Relief valves are widely used in industrial machinery. Due to the outlet of the relief valve being connected to the tank, the pressure drop of the relief valve is frequently equal to the inlet pressure. Accordingly, the energy loss of the relief valve is very high in some cases and this will worsen with an increase in the rated pressure of the hydraulic system. In order to overcome the disadvan...

A compressor accumulator based on a different concept from a conventional suction accumulator is proposed. The new accumulator distinguishes itself from the conventional design in that it is pre~ charged with oil. Primary function of an accumulator being storage of excess refrigerant during certain operating conditions of the air conditioning system, this pre~charging may first seems odd, but f...