Abstract The Temple of the Inscriptions at Palenque, Mexico, is an outstanding example Classic Maya architecture erected in seventh century as funerary building for ruler K'inich Janab Pakal. For decades, scholars have speculated on its construction sequence and potential existence hidden rooms either side Pakal's mortuary chamber. This article aims to advance understanding Temple's architectur...

China is a large agricultural country, each year will produce number of straw. The recycling straw to China's development and environmental protection are very helpful, the mainly energy, fertilizer, feed several uses, different uses need crushing fineness, so adjust fineness can improve rate This paper on impact factors for focuses theoretical analysis study affecting crushing, provides genera...

In recent years a number of embankments were designedwith concrete overtopping protection shaped in a stepped fashion. During large overflows on stepped chutes, there is no skin friction between mainstream and steps, and flow resistance is basically form drag. Alterations of flow recirculation and of fluid exchanges between free-stream and cavity flow are discussed in this study. A comprehensiv...

This paper presents an analysis of selected acoustic properties gear pumps. For this purpose, the characteristics types displacement pumps—gear pumps—are discussed, as well discrete methods identification and classification signals. The basic assumptions noise in reverberation chambers are distribution measurement points using decision trees statistical measured levels was conducted. object for...

We present our latest model of lightning process. The model has two main advantages: computations were made using adaptable (e.g. non-fixed) computational mesh and we allowed branching of the stepped leader. The electrodes and the stepped leader were modelled as conductors surrounded by a homogenous dielectric media. We took in account observations of stepped leader in atmosphere and used a qua...

The adenocarcinoma which commonly occurs in the kidney of leopard frogs has been transplanted into the anterior chamber of the eye where its growth characteristics have been studied by direct observation with the slit-lamp microscope. Such observations have been amplified by photographs taken at intervals to furnish permanent and objective records of the mode of development and progress of the ...

A coarray-based synthetic aperture beamformer using stepped-frequency signal synthesis and post-data acquisition processing is presented for wideband imaging of near-field scenes. The proposed beamformer formulation and implementation finds key applications in through-the-wall microwave imaging and landmine detection problems. While coarray techniques offer significant reduction in array elemen...

hydraulics of stepped spillway is a very complicated phenomenon, as it consists of a two phase flow passing through a set of designed steps. the steps increase the rate of energy dissipation taking place on the spillway face. turbulence, flow aeration and energy dissipation are the main tasks in the design of such structures. this study consists of the experimental investigation to determine th...

This paper reports a CFD modeling study to investigate the hydrogen-air mixture combustion in a micro scale chamber. Nine species with nineteen reversible reactions were considered in the premixed combustion model. The effect of operational and geometrical conditions including; combustor size, wall conductivity, reactant flow rates and hydrogen feed splitting on combustion stabilit...

introduction radiotherapy planning systems require many percentage depth dose (pdd) and profile measurements and there are various dosimeters that can be used to obtain these scans. as dose perturbation is particularly troublesome in smaller photon fields, using a low-perturbation, unshielded electron field diode (efd) in these fields is of interest. the aim of this work was to investigate the ...