We present an original experimental study of the compaction dynamics for two-dimensional granular systems. Compaction dynamics is measured at three different scales: the macroscopic scale through the normalized packing fraction rho, the mesoscopic scale through the normalized fraction phi of hexagonal domains in the system, and the microscopic scale through the grain mobility mu. Moreover, the ...

Testing system-on-chip involves applying huge amounts of test data, which is stored in the tester memory and then transferred to the circuit under test during test application. Therefore, practical techniques, such as test compression and compaction, are required to reduce the amount of test data in order to reduce both the total testing time and the memory requirements for the tester. In this ...

Compaction of Bi and Ta powders was performed by uniaxial pressing at room temperature. Post-pressing density was evaluated as a function of the compaction pressure, and indicated that as the Ta content increases there is a reduction in density for comparable pressing conditions. A modified Heckel equation is used to evaluate the compaction behavior. The analysis indicates that the yield pressu...

In this paper we show that an accumulator can be modified to behave as a Non-Linear Feedback Shft Register suitable for test response compaction. The hardware required for this modification is less than that required to mod& a register to a Multiple Input Linear Feedback Shgt Register, MISR. We show with experiments on ISCAS’85, ISCAS’89 benchmark circuits and various types of multipliers that ...

Silica refractory bricks are used especially in the metallurgical industries, due to desirable properties such as high melting point, rigidity, and high temperatures strength. In this research, different amount of SiC were added to Silica refractory containing different binders such as Borax, Boric acid, Calcium nitride, Sodium tri poly phosphate, Sodium hexa meta phosphate (SHMP) and lime. Phy...

Energy compaction filters have attracted considerable attention due in part, to the fact that they are the building blocks of optimal orthonormal (paraunitary) filter banks. In this paper we introduce some new design techniques for optimum M-channel FIR compaction filters for a given input power spectrum. Some properties of the optimum FIR compaction filters and the corresponding maximum compac...

The quality of earth structures highly depends on the compaction state of fill layers, which can be made up of a wide range of various materials. Compaction is usually accomplished by vibratory rollers; the vibration of the drum is generated by rotating eccentric masses. Moreover, dynamic rollers with different types of excitation have been developed in the last decades, including rollers with ...

The fundamentals of our understanding the mechanical compaction porous rocks stem from experimental studies. Yet, many these studies use natural materials for which microstructural parameters are intrinsically coupled, hampering diagnosis relationships between microstructure and bulk sample behavior. To probe influence porosity grain size on granular rocks, we performed experiments synthetic sa...

Compaction-induced permeability reduction in a producing reservoir rock/soil can be significant, but nevertheless is often neglected or overly simplified in reservoir simulations. Provided examples show that the commonly used compaction models in reservoir simulators are not capable of capturing the actual spatial variation of the compaction, which generally is more complex than the simplified ...