Surface topography is of great importance in radar back scattering, but the quantitative interpretation of data collected in the field is still a difficult problem. We present topographic profiles at 25-cm and 5-cm horizontal resolution for three sites along a lava flow on KUauea Volcano, and use these data to illustrate techniques for surface roughness analysis. Height and slope distributions ...

This paper describes a new speech analysis method, an adaptive Mel-LPC (AMLPC) analysis method, using human auditory characteristics. The Mel-LPC analysis method that we have proposed is an efficient time domain technique to estimate the warped predictors from input speech directly. However, the frequency resolution of spectrum obtained by Mel-LPC analysis is constant regardless of the characte...

In this paper we propose a simple method aiming at improving the visibility of the loss of the gray-white matter interface in computer tomography (CT) brain images. The loss of the gray-white matter interface is one of the early signs of acute cerebral artery infarction (ACAI). The method is to employ our proposed adaptive smoothing filter (ASF) to reduce local noise with edges preserved in CT ...

We calculate theoretical isochrones, in a consistent way, for five filters in the atmospheric window between 1.9μm and 2.5μm, K, K , Ks, F205W, and F222M, using the Padova stellar evolutionary models by Girardi et al. Even when displayed in the same Vega magnitude system, the near-infrared colors of the same isochrone can differ by up to 0.18 mag at its bright end, depending on the filter. We p...

Perceived blur is an important measure of image quality and clinical visual function. The magnitude of image blur varies across space and time under natural viewing conditions owing to changes in pupil size and accommodation. Blur is frequently studied in the laboratory with a variety of digital filters, without comparing how the choice of filter affects blur perception. We examine the percepti...

The movement of fecal pathogens from land to surface and ground water are of great interest because of the public health implications. Non-structural best management practices that control the timing, volume, and placement of animal manures are commonly used to limit opportunities for fecal pathogens to enter water bodies. Increased infiltration capacity, water and waste diversions, and vegetat...

Edge enhancement is an operation commonly employed in image processing. Usually the edge slope is steepened by the applying a linear filter that amplifies the high spatial frequency content of an image. This often results in the amplification of noise and in ringing or over-enhancement of edges that are already sharp. The rank filter is a nonlinear filter. The output value for a pixel is obtain...

Abstract This study dealt with the reduction of soil loss from variously managed grass filter strips. Slope plots under a rainfall simulator were employed in this study. In order to investigate the effect of grass filter strips on the reduction of soil loss, the amount of soil supplied was compared with soil loss in each plot. The reduction of soil loss from cut weeds was similar to that from n...

An intermittent noise that occurs around 30 seconds after compressor start-up has been disturbing customers of many domestic refrigerator manufacturers over the past 10 years. This noise is very similar to that produced by popcorn popping, being referred to as popping noise. The most probable cause of this strange and unpleasant noise is thought to be CIS (Condensation Induced Shock). The aim o...

The use of non-linear loads critically affects the quality of supply by drawing harmonic currents and reactive power from the electrical distribution system. Active power filters are the most viable solution for solving such power quality problems in compliance with the harmonic standards. This article presents a digital signal processor (DSP) based fundamental-tuned-filter (FTF) algorithm for ...