It has recently been shown that the response to a virtual source in the subsurface can be derived from reflection data at the surface and an estimate of the direct arrivals between the virtual source and the surface. Hence, unlike for seismic interferometry, no receivers are needed inside the medium. This new method recovers the complete wavefield of a virtual source, including all internal mul...

A lock-in thermography system is introduced, which allows temperature modulations in the 10 μKrange to be detected. Under certain conditions (homogeneous infrared emissivity and thermal properties, good signal-to-noise ratio), the spatial resolution of lock-in thermographic investigations of local heat sources in electronic devices can be improved by spatial deconvolution. An iteratively workin...

introduction main part of energy consumption in agricultural mechanization is tillage operations therefore optimization of energy consumption in tillage operation is very important. a management method for system to optimize in agriculture is simple additive weighting (saw) methodology that this method can operate according to criteria of the systems. this method states that, which system has b...

Two new methods are presented for recovering the focused image of an object from only two blurred images recorded with different camera parameter settings. The camera parameters include lens position, focal length, and aperture diameter. First a blur parameter sigma is estimated using one of our proposed depth-from-defocus methods. Then one of the two blurred images is deconvolved to recover th...

We introduce a variational approach for simultaneous optical flow computation and video denoising. The proposed functional includes optical flow terms that depend on the restored sequence and an image sequence restoration term that depends on the optical flow. Our functional results in coupled Euler-Lagrange equations that are solved simultaneously for both the optical flow and the image sequen...

Two standard methods for numerically estimating Lyapunov exponents are reviewed and it is noted that a numerical integration scheme that preserves orthonormality is required. A procedure is introduced for modifying arbitrary rth order numerical schemes to preserve orthonormality. Convergence is shown for the particular case when explicit Euler's method is taken as the arbitrary method. This mot...

Airborne magnetic and radiometry data sets over potential gold mineralisation associated with mesothermal alteration zones in the western Ilesha schist belt, Southwestern Nigeria, were interpreted. This was done to provide information on possible extent of geologic transformations that accompanied area. Interpreted gamma spectrometric successfully used delineating hydrothermal potassium K enric...

Communities in North Africa and the Middle East are suffering from a lack of water supplies. In Egypt, this problem will be severe due to expected shortage River Nile supply. Therefore, looking for investigating groundwater aquifers target. The current study is an attempt investigate Wadi El Assiuti area’s deep aquifer, which has been identified as potential development, establishing new commun...

The exponential Euler method is a nonstandard approximation scheme that was developed specifically for the Hodgkin-Huxley differential equation models that arise in neuroscience and was one of the discretization schemes used in the neural systems package called GENESIS. In this article, we show the scheme is first order accurate, develop a second order accurate extension, and suggest ways the m...

Multidimensional microscopy is an essential tool for research and industry in the areas of cellular biology and molecular medicine, cell-based drug discovery and cellular therapies. Modern microscopic methodologies have brought the possibility to follow live cells in action, responding to various perturbations. These capabilities include not only detailed dynamic information about cell morpholo...