[1] We investigate experimentally the functional relationship between capillary pressure, Pc, wetting phase saturation, Sw, and interfacial area per volume between the wetting and nonwetting phases, awn, for drainage and imbibition processes in micromodels of twodimensional pore structures. Within the experimental and analysis error (around 10–15%), the resulting Pc-Sw-awn surfaces were the sam...

This chapter reports on the development of a Wide-Area Measurement System in Mexico entitled SIMEFAS (Sistema de Medición Fasorial). It has been designed to increase the security and integrity of Mexico’s electric power system. Current development of SIMEFAS includes five regional PDCs to which phasor data is sent by PMUs spread over the National Electrical System. Developed applications includ...

In this paper we present a high-speed measurement study of round-trip delays, and TCP throughput with various window sizes. The measurements using ping and ttcp are performed over 155 mbit OC-3 Packet over SONET MAN connections. In addition, short hop test results over zero, 1, and 2 layer 2 switched gigabit ethernet connections are presented. In general, FreeBSD was used for host testing. A fe...

Power system is a highly interconnected nonlinear system that needs optimal and accurate control for continuous operation. Large power transfer through long transmission line between different electrical areas, stressed system and adverse interaction between local controllers, may give rise to slow frequency inter-area oscillations. The inter-area modes may not be visible from local measurement...

It is well known that the metropolitan area of Bangkok, Thailand, has been subsiding during the past decades. This ground deformation has been monitored using leveling networks on annual basis since 1978. However, the employed technique is costly, time-consuming, and able to monitor only on a limited number of benchmarks. InSAR (Interferometric Synthetic Aperture Radar), which can provide sub-c...

Leaf area index is one of the most important parameters in ecological and environmental studies. This paper presents a method for single leaf area measurement based on the counting of the leaf pixels in digital leaf image. Initially, the target leaf is put on a piece of white paper on which four endpoints of an equal-length and orthogonal cross are printed. A background color threshold is then ...

Many software companies are involved in eager attempts to manage experience and knowledge on an organisational level. Experience that can be used for estimating and planning purposes are of great value. One obvious solution can be defining and storing a set of measurements representing these experiences, carry out statistical analyses, and developing rules and guidelines to find and use this ex...

purpose : to offer a semi-automatic algorithm to determine the area of angiographic hyperfluorescence methods : the proposed algorithm included wavelet filter, histogram equalization and modified otsu thresholding. hyperfluorescent area of 30 angiographic images obtained from patients with leaking choroidal neovascularization (cnv) and diabetic retinopathy were evaluated and the results were co...

UNLABELLED PREMISE OF THE STUDY Measurement of leaf areas from digital photographs has traditionally required significant user input unless backgrounds are carefully masked. Easy Leaf Area was developed to batch process hundreds of Arabidopsis rosette images in minutes, removing background artifacts and saving results to a spreadsheet-ready CSV file. • METHODS AND RESULTS Easy Leaf Area us...