In the present research, thixoforming route was carried out in order to enhance the microstructural features of LM28 piston alloy. Typical microstructure of this alloy was composed of coarse, polygonal primary silicon particles, eutectic matrix and intermetallic phases. Thermal analysis was carried out to study the solidification path of the base alloy and determine the major arrest temperature...

To develop a no-reference video quality model, it is important to know how the perceived strengths of artifacts are related to their physical strengths and to the perceived annoyance. When more than one artifact is present, it is important to know whether and how its corresponding perceived strength depends on the presence of other artifacts and how perceived strengths combine to determine the ...

Total Variation (TV) methods, introduced by L. Rudin and S. Osher a few years ago, are very e ective for the recovery of blocky, possibly discontinuous images, from noisy data. Unfortunately they are not so e ective for the recovery of textured regions. To improve this, recently, L. Rudin introduced a novel functional, the Multiscale Total Variation (MTV). The functional is designed so that it ...

The three-dimensional (3D) displays required the depth information which is unavailable in the conventional 2D content. This work presents a novel algorithm that automatically converts 2D images into 3D ones. The proposed algorithm first segments the image into object groups by choosing an effective grouping method. This is done with the help of the edge information. The grouping is based on th...

Introduction: Bistatic radar measurements of the lunar surface are being carried out by the Mini-RF team using Arecibo as a transmitter, cf. Fig. 1. The resulting radar images – the first to be collected at non-zero bistatic phase angle β (between source and receiver) – are being studied extensively to test the hypothesis that water ice resides inside permanently shadowed and perhaps other very...

Incorporation of metallic particulate reinforcements in eutectic Sn-Ag solder re­ sults in the formation of intermetallic compounds (IMCs) along particulate/ solder interfaces with different morphologies. For instance, “sunflower” and “blocky faceted” IMC shapes have been observed around Ni particle reinforce­ ments incorporated in the eutectic Sn-Ag solder matrix. The time and tempera­ ture ab...

We describe a method of object-selective quantizer control in a standard coding system based on MC DCT| CCITT Recommendation H.261. The approach is based on two novel algorithms, namely buuer rate modulation and buuer size modulation. By forcing the rate control algorithm to transfer a relatively small fraction|about 10{ 15% on average|of the total available bit rate from the coding of the non-...

Mechanical incorporation of metallic particles in the Sn-Ag-based solder re­ sulted in various intermetallic compound (IMC) morphologies around these particles during reflow. Unlike with the Ni particles, the IMCs formed around Cu and Ag particles are relatively insensitive to reflow profiles employed. The IMC formed around the Ni particles ranges from “sunflower” morphology to “blocky” morphol...

Blocking effect is the most annoying artifact in block transform-coded image/video. Objective measurement of blocking artifact plays an important role in the development, optimization, and assessment of image/video coding systems. It is also very useful for the design and evaluation of the post-processing algorithms at the decoding side. In this report, a deterministic approach is proposed that...

We consider estimating an unknown signal, which is both blocky and sparse, corrupted by additive noise. We study three interrelated least squares procedures and their asymptotic properties. The first procedure is the fused lasso, put forward by Friedman et al. (2007), which we modify into a different estimator, called the fused adaptive lasso, with better properties. The other two estimators we...