Small samples of rock, like those used in laboratory collision experiments, are known to be much stronger than bodies that are meters to hundreds of meters in size [1]. Specifically, the impactor energy per unit target mass needed to shatter the target decreases dramatically with increasing target size. This occurs because the strength of rock, like many other geological materials, depends stro...

Reactivity Controlled Compression Ignition (RCCI) is one of the most promising solutions among low temperature combustion concepts, in terms thermal efficiency and pollutant emissions. However, for values brake mean effective pressure higher than 10 bar, in-cylinder peak rise rates tend to be too high, limiting specific power any 4-Stroke (4S) engine. Such a limitation can canceled by moving 2-...

The development of modern vehicle drives is aimed at reducing fuel consumption (i.e., crude oil) and minimizing the exhaust emission toxic components. One such implementation a two-stage combustion system. Such system initiates ignition in prechamber, then burning mixture flows into main chamber, where it ignites lean mixture. allows efficient mixtures, both liquid gaseous fuels, cylinder. This...

We asked 12 patients with left visual neglect to bisect the gap between two cylinders or to reach rapidly between them to a more distal target zone. Both tasks demanded a motor response but these responses were quite different in nature. The bisection response was a communicative act whereby the patient indicated the perceived midpoint. The reaching task carried no imperative to bisect the gap,...

The homogeneous charge compression ignition (HCCI) and the exploitation of ethanol as alternative fuel is one way to explore new frontier of internal combustion engines and towards maintaining its sustainability. Misfire and partial burning can cause several serious problems in the HCCI engines fuelled with ethanol. Novel methods for identification of misfire play important roles in HCCI engine...

Under the stress of environmental pollutions and fossil fuel consumption caused by on-road transport, hybrid vehicles are attracting much attention. Opposed rotary piston (ORP) engines a promising power source for vehicles, due to their compact designs high density. In this paper, combustion emission characteristics turbocharged ORP engine fuelled with hydrogen were investigated evaluate overal...

Due to the high power-to-weight ratio and robustness, hydraulic cylinders are widely used in actuation area of legged robot systems. Most these applications focused on motion stability, gait planning, impedance control. However, energy efficiency robotic system is also a very important point be considered. Hopping locomotion requires fast extension tibia leg at end take-off phase, which causes ...

Heavy-duty over-the-road trucks require periodic active diesel particulate filter regeneration to clean the filter of stored particulate matter. These events require sustained temperatures between 500 and 600°C to complete the regeneration process. Engine operation during typical 65mile/h highway cruise conditions (1200 rpm/7.6 bar) results in temperatures of approximately 350°C, and can reach ...

Valvetrain flexibility enables the optimization of the engine’s ability to breathe across the operating range, resulting in more efficient operation. The authors have shown the merit of improving volumetric efficiency via valvetrain flexibility to improve fuel efficiency at elevated engine speeds in the previous work. This study focuses on production viable solutions targeting similar volumetri...