The development of the obstetric ultrasound [6] has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and fetus [7] during pregnancy [8]. Obstetric ultrasonography, often referred to as ultrasound [6], is a technology that uses sound waves to produce images of structures inside the human body. A handheld probe emits sound waves, which are reflected ba...

We present 3D prestack map time migration in closed form for qP-, qSV-, and mode-converted waves in homogeneous transversely isotropic media with a vertical symmetry axis (VTI). As far as prestack time demigration is concerned, we present closed-form expressions for mapping in homogeneous isotropic media, while for homogeneous VTI media we present a system of four nonlinear equations with four ...

This paper demonstrates that the waves produced on the surface of water can be used as the medium for a “Liquid State Machine” that pre-processes inputs so allowing a simple perceptron to solve the XOR problem and undertake speech recognition. Interference between waves allows non-linear parallel computation upon simultaneous sensory inputs. Temporal patterns of stimulation are converted to spa...

Characterization of a tunable & switchable microstrip rectangular patch antenna printed on synthesized LiTi ferrite substrate with a normal magnetic bias field is presented. In this paper the concept of switching and tuning has been described by magnetostatic and spin waves phenomenon. The DC magnetic biasing generate these both type of waves which response a number of novel magnetic and electr...

The development of the obstetric ultrasound [6] has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and fetus [7] during pregnancy [8]. Obstetric ultrasonography, often referred to as ultrasound [6], is a technology that uses sound waves to produce images of structures inside the human body. A handheld probe emits sound waves, which are reflected ba...

Phases of the 600 km. deep earthquake of April 16, 1957, which have not been reflected at the earth's surface show very sharp beginnings arriving within the limits of error of a few seconds at the cMculated times. However, phases which have been reflected at the surface, for example PP, pP', pPP, have more or less emergent beginnings which arrive between a few seconds and as much as 30 seconds ...

Abstract. The use of distributed acoustic sensing (DAS) presents unique advantages for earthquake monitoring compared with standard seismic networks: spatially dense measurements adapted harsh environments and designed remote operation. However, the ability to determine source parameters using DAS is yet be fully established. In particular, resolving magnitude stress drop a fundamental objectiv...

The decreasing diagrams technique is a complete method to reduce confluence of a rewrite relation to local confluence. Whereas previous presentations have focussed on the proof the technique is correct, here we focus on applicability. We present a simple but powerful generalisation of the technique, requiring peaks to be closed only by conversions instead of valleys, which is demonstrated to fu...