Morphological granulometries have been used successfully to discriminate textures in the context of classical featurebased classification, and more recently they have been used as observation variables for estimators in the context of random sets. This paper considers optimal linear parametric estimation of the law of a random set. It is set in a Bayesian framework in that estimation is of the ...

In stiff fiber-reinforced material, the high shear stress concentration occurs in the narrow region between fibers. With the addition of a small geometric change in crosssection, such as a thin fiber or a overhanging part of fiber, the concentration is significantly increased. This paper presents mathematical analysis to explain the rapidly increased growth of the stress by a small particle in ...

Hardpans (plough/hoe pans) are commonly believed to restrict plant root growth and crop yields under conventional small-scale agriculture in sub-Saharan Africa. This study questions the notion of widespread hardpans in Zambia and their remedy under conservation tillage. Soil penetration resistance was measured in 8x12 grids, covering 80 cm wide and 60 cm deep profiles in 32 soil pits. Large and...

In the present study, we designed a ring rolling preform for producing a ringed product with a grooved outer circumferential surface. One of the most common defects in the profile of a ring rolling process is unfilling, which occurs when the deformation amount of product is small or the depth of the groove in the outer surface is large. To prevent unfilling, the deformation amount should be inc...

In present work a compound holographic system consisting of a diffraction grating and a holographic lens has been fabricated to disperse and focus different portion of solar spectrum on laterally arranged solar cells of different band gaps to achieve maximum efficiency operation. Such concentrators are light–weight, low-cost and do not require tedious processing for their mass production.

Wt> f~rirsire the goal of tran.sf~arent~y &striGuling object-oriented fuwgrwr~.~ by consbrircting a systerfi of arrdictr-y ot5j’ect.s rrhich behace like refweventatices qf the original chs.se.s of tfw pmgrarri. Thy are rtn oh&toriented e.ztension of the well-known u.strlb rnorlrdes “. The he.st way o~designing these au.xilia~ objects i.s to hoe therri mirror the iri heritance stmctrire of tfie ...

We describe a class of devices based on elastomeric optical phase gratings. These devices operate by reversibly controlling the phase of transmitted or reflected light by mechanical compression of the transparent elastomer. An optical modulator and an element in an optical display demonstrate two possible applications.

Two active Mach-Zehnder interferometers are integrated in a monolithic InP/InGaAsP photonic integrated circuit. Together they form a crucial component for optical signal processing: an optical memory element or set-reset flip-flop. The switching time for this initial device is approximately 200 ps. The photonic integrated circuit contains active and passive optical components, including electro...

The dynamic topology of ad hoc networks makes route discovery and reconstruction a non-trivial task. In this work we propose the use of mobility prediction to assist in ad hoc routing. A method of route discovery and route reconstruction using the sectorized mobility prediction technique is presented. Simulation and analytical results of the proposed routing strategy find it to offer considerab...

Chittagong Hill Tracts (CHT) is situated in the Southeast of Bangladesh covering about 10 per cent of the total land. It is the native hoe of 13 tribal communities and these communities have their own traditional knowledge for natural resource managements. This paper provides 8 traditional knowledge namely, folk classification of landform, land use zoning, community reserve for common resource ...