The memory wall continues to pose a performance bottleneck for computer systems—studies show that modern servers spend up to two-thirds of execution time stalled on memory accesses. Although recent trends forecast growth in processor clock frequencies to be minimal, improvements to memory access latencies are correspondingly slow. Traditional approaches, such as large on-chip caches, hardware m...

abstract soil invertebrate and their spatial pattern are affected strongly by environmental factors. spatial variability of soil properties is one of the most important reasons of the macrofauna variability. this study was conducted to investigate the spatial variability of soil properties and soil macrofauna biomass in the riparian forest landscape of karkhe river. soil macro fauna were sample...

This paper presents the analysis of spatial correlation in MIMO channels, calculated from data measured in office environments at 5.2GHz. Results are compared with those from channels generated using a stochastic MIMO channel model and the effect of different comparison metrics is shown. The suitability of the stochastic model under different propagation conditions is also investigated.

ABSTRACT Recently there has been an increasing interest in the use of the TDE technique to locate and track acoustic sources in a conferencing environment. Typically, the delay estimate is obtained as the time-lag that maximizes the cross-correlation function between the filtered versions of two received signals. This so-called generalized cross-correlation technique, based on the measurements ...

To find the position of an acoustic source in a room, a set of relative delays among different microphone pairs has to be determined. The generalized cross-correlation method is the most popular to do so and is well explained in a landmark paper by Knapp and Carter. In this technical memorandum, we show how we can take advantage of the redundancy when more than two microphones are available. It...

Spatial fading correlation is a crucial impairment for practical Multiple-Input Multiple-Output (MIMO) wireless communication systems. Hence, in system simulations spatial correlation should be taken into account. The main disadvantage, however, is that in general it is represented by a large number of parameters, namely, the various correlation matrix entries. In this paper, we introduce a com...

soil salinity is a limiting factor for plant growth and a serious cause of land degradation. field sampling and statistical analysis for estimating soil salinity is expensive and time consuming. estimating soil salinity by spatial statistical models and geographic information system (gis) is recommended, because it saves labor and time. this study was conducted to evaluate the performance of sp...

Driven diffusive systems have been a paradigm for modelling many physical, chemical, and biological transport processes. In the systems, spatial correlation plays an important role in the emergence of a variety of nonequilibrium phenomena and exhibits rich features such as pronounced oscillations. However, the lack of analytical results of spatial correlation precludes us from fully understandi...