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We propose a novel technique called bispectral photometric stereo that makes effective use of fluorescence for shape reconstruction. Fluorescence is a common phenomenon occurring in many objects from natural gems and corals, to fluorescent dyes used in clothing. One of the important characteristics of fluorescence is its wavelength-shifting behavior: fluorescent materials absorb light at a certain...
We address the problem of recovering shape, albedo, and illumination from a single grayscale image of an object, using shading as our primary cue. Because this problem is fundamentally underconstrained, we construct statistical models of albedo and shape, and define an optimization problem that searches for the most likely explanation of a single image. We present two priors on albedo which encourage...
This paper focuses on the pulsed eddy current (PEC) excitation in nondestructive evaluation (NDE). In conventional eddy current NDE, where the harmonic excitation is used, the optimal inspection frequency for detection and evaluation of expected defects depends on material thickness and its electromagnetic properties. In PEC a single pulse can, in principle, generate a wide range of frequency components...
This paper presents the results of evaluation of several methods commonly used in coastal engineering practice for equilibrium beach profile calculation. Three approaches were used to calculate the shape of equilibrium beach profile: the Bruun-Dean formula, the method prescribed by Coastal Structure Construction Code, and numerical modeling by SBEACH. The calculation results were compared with the...
This paper proposes to apply parallel transport and statistical atlas techniques to quantify 4D myocardial motion abnormalities. We take advantage of our previous work on cardiac motion, which provided a continuous spatiotemporal representation of velocities, to interpolate and reorient cardiac motion fields to an unbiased reference space. Abnormal motion is quantified using SPM analysis on the velocity...
The transition to lead free solders has accentuated the inherent reliability problem in electronic packaging caused by thermo mechanical mismatch between different parts of an assembled system. To mitigate this problem, polymer core solder balls (PCSBs) have been proposed as a mechanically more flexible and therefore more reliable alternative to solid solder balls normally used for such applications...
Hyper-redundant manipulators can be fragile, expensive, and limited in their flexibility due to the distributed and bulky actuators that are typically used to achieve the precision and degrees of freedom (DOFs) required. Here, a manipulator is proposed that is robust, high-force, low-cost, and highly articulated without employing traditional actuators mounted at the manipulator joints. Rather, local...
In this paper, we describe the rolling of a tensegrity robot driven by a set of pneumatic soft actuators. Tensegrity is a mechanical structure consisting of a set of rigid elements connected by elastic tensional elements. Introducing tensegrity structures, we are able to build soft robots with larger size. Firstly, we show the prototype of a six-strut tensegrity robot, which is driven by twenty-four...
In this paper, we investigate the frequency response and materials composition of a crossed-dipole FSS)Frequency Selective Surface). Moment methods in spectral domain, are employed to gain reflection coefficients of crossed-dipole FSS for both polarizations, providing valid analysis, especially in practice. The appropriate properties of crossed-dipole shape, in both its fabrication and its analysis,...
In this study, we address the issue on multilevel object recognition. The multilevel object recognition is object recognition in various levels, that is, simultaneous recognition of its instance, category, material, etc. At each level, many recognition methods have been proposed in the literature. Therefore it is straightforward to design a multilevel object recognition system using conventional methods...
Capturing appearance of material with respect to illumination and viewing directions is crucial to achieve realistic visual experience in virtual environments. The capturing process is time demanding or requires a specific shape of the captured material. Therefore, we propose a method of such a data reconstruction from very sparse measurements, whose placement allows for continuous and fast acquisition,...
Many three-dimensional (3-D) image-based studies concerning granular and sintered materials require a description of the observed microstructures in terms of individual grains. We propose a robust segmentation algorithm which identify groove regions on the object's surface in order to locate possible grain boundaries in the object's volume. The algorithm relies on the volumetric propagation via Voronoi...
This paper deals with the experimental investigation of effects of geometrical parameters of cutting tool insert and analysis of output responses such as surface roughness and Material Removal Rate (MRR) during machining AISI 1045 steel. This analysis is essential, since the wear, occurring at the cutting edge of the insert favors the surface roughness at the machined surface. Taguchi's Design of...
There are huge potential for hydropower development in Himalayan region in general and Nepal is particular. However, there are also technical challenges for hydropower development due to sediment erosion problem. Erosion not only reduces efficiency and life of hydropower turbines but also causes problems in operation and maintenance. A large number of factors can influence the process of sediment...
In this paper, a novel fire recognition algorithm based on muti-features fusion(MFF) with self-adaptive, self-learning and fault tolerance is proposed after analyzing the characteristics of the burning fire, and taking the flame's twinkling frequency and its dynamic contour into account. First, picking up the dynamic video of fire, extracting the eigenvector of suspicious fire area, and using disperse...
The means and the cooling processes of the heat generating working machinery in industry are essential. Their performance depends on their ability to evacuate generated heat outside the working assembly to the air. A very effective and widespread method often used in engineering employs the fins. They act as a thermal bridge between the heating wall and the reactive medium. However, their design is...
We report the first experimental demonstration of guiding, bending, filtering, and splitting of EM wave in 2D disordered PBG materials, along arbitrarily curved paths, around sharp bends of arbitrary angles, and through Y shape junctions.
In this research, based on the case study in Nanjing and Fukuoka, the relations between the components and the impression evaluation of restaurants' facades in city centre are shown. In a series of surveys and analysis, it is clear that the relevancies between quality factors and facade's components, such as the shape of windows, colors' tone, sign boards, the size of shop name's characters, advertisements,...
High density interconnection is a key technology to realize the miniaturization trend in Integrated Circuit (IC) industry, and to reduce power consumption for next generation mobile devices. In advanced three-dimensional (3D) package, fine pitch pillar bump is deployed not only to fulfill ever-growing I/O density requirement, but also provides better electrical performance than that of traditionally...
Improvement on material handling systems is demanded as world mining production continuously increases. Additionally, the supply of iron ore grades close to customer demand is crucial especially due to the gradual decline, in recent times, of quality iron ore grades. Stockpiles play a major role in storing material and reducing grade variation among material. Contrary to the conventional approach...
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