With the deep development and application of Internet technology, data need to be processed more and more, when dealing with large amounts of data. Spark is a versatile high-performance and parallel computing framework, which can be applied to data mining. This paper is based on the parallelization of platforms’ K-means algorithm, by building a YARN cluster environment and making experiments to...

Main Features »Suitable for 2-stroke, older 4-stroke and performance engines (racing). »Multiple spark output (see Table1). »Operates on reluctor, points or Hall effect signals. »Two points inputs for twin coil engines. »Usable to beyond 1000 sparks/second (equals 15,000 RPM for a V8). »Regulated 300V supply for consistent spark energy. »High frequency operation eliminates audible oscillator no...

Spark timing of an Internal Combustion (IC) engine is often limited by engine knock in the advanced direction. The ability to operate the engine at its advanced (borderline knock) spark limit is the key for improving output power and fuel economy. Due to combustion cycle-to-cycle variations, IC engine combustion behaves similar to a random process and so does the engine performance criteria, su...

Electric current-assisted sintering (ECAS) technologies are highly promising for processing of NdFeB magnets. Due to the combination direct Joule heating and application external load, even powders, whose particle size distribution morphology not optimum conventional powder like melt-spun powders or magnet scrap, can be easily sintered high densities. A systematic study is done demonstrate pote...

Building on efforts to promote a culture of innovation at the Johns Hopkins University Applied Physics Laboratory (APL), Central Spark is a collection of exploratory spaces and concepts designed to provide APL staff members with new means to develop creative solutions to their sponsors’ most difficult challenges. Areas associated with Central Spark are open 24/7 and encourage creative explorati...

As more and more devices connect to Internet of Things, unbounded streams of data will be generated, which have to be processed “on the fly” in order to trigger automated actions and deliver real-time services. Spark Streaming is a popular realtime stream processing framework. To make efficient use of Spark Streaming and achieve stable stream processing, it requires a careful interplay between ...

Examining calcium spark morphology and its relationship to the structure of the cardiac myocyte offers a direct means of understanding excitation-contraction coupling mechanisms. Traditional confocal line-scanning achieves excellent temporal spark resolution but at the cost of spatial information in the perpendicular dimension. To address this, we developed a methodology to identify and analyze...

Examining calcium spark morphology and its relationship to the structure of the cardiac myocyte offers a direct means of understanding excitation-contraction coupling mechanisms. Traditional confocal line scanning achieves excellent temporal spark resolution but at the cost of spatial information in the perpendicular dimension. To address this, we developed a methodology to identify and analyze...

The spark advance determines the efficiency of spark-ignited (SI) engines by positioning the combustion in relation to the piston motion. Today’s spark-advance controllers are open-loop systems that measure parameters that effect the sparkadvance setting and compensate for their effects. Several parameters influence the best spark-advance setting but it would be too expensive to measure and acc...

In this study, an industrial polycrystalline SiC tile was successfully sintered by pressureless sintering at 2150°C for 1 hour. The physical and mechanical properties of silicon carbide including density, hardness, bending strength, and fracture toughness were evaluated. The results indicated that the mentioned properties were 3.08 g.cm-3, 2503 HV0, 249.3 MPa, and 1.23 MPam0.5</...