Synthetic Aperture Focusing Technique imaging has became a popular tool in the field of non-destructive testing in the past years. The acquisition procedure consists in collecting the data after activating elements one by one. The reconstructed object is then computed by adding the contribution of each channel, selecting the proper time delay values. It is the principle of the well-known delay ...

The synthetic aperture focusing technique (SAFT) is a well-established method for improving the resolution of an ultrasonic image. A major shortcoming is the inherent assumption that the pulse reflected from a flaw has a spectral content that is independent of the flaw's location relative to the transducer. In this project, we address the issue by using SAFT combined with Wiener filtering and a...

Synthetically focused imaging has been used for some time in the NDE community. The techniques have primarily been directed towards imaging using bulk waves. There has recently been use of SAFT (Synthetic Aperture Focusing Technique) using guided waves in plates. Here, we review three different synthetically focused imaging algorithms for a linear array aperture: CSM (Common Source Method), SAF...

We propose a GPU-accelerated implementation of frequency-domain synthetic aperture focusing technique (SAFT) employing truncated regularized inverse k-space interpolation. Our achieves sub-1s reconstruction time for data sizes up to 100 M voxels, providing more than tenfold decrease in as compared CPU-based SAFT. provide an empirical model that can be used predict the execution quasi-3D any siz...

A statistical associating fluid theory for potentials of variable range to model dipolar fluids is presented. The new theory, termed the SAFT-VR+D equation (the statistical associating fluid theory for potentials of variable range plus dipole), explicitly accounts for dipolar interactions and their effect on the structure of the fluid. This is achieved through the use of the generalized mean sp...

هدف: سکوت سازمانی پدیده‌­ای رایج و متداول در سازمان­‌ها واقعیتی موجود ملموس برای مدیران کارکنان است. یکی از موانع مهم موفقیت برنامه‌­ها اهداف سازمان، فقدان اطلاعات، اعتماد آن چیزی است که پژوهشگران را نام نهاده‌­اند عبارت خودداری بیان ایده‌­ها، نظرات اطلاعات راجع به مشکلات سازمانی. سویی دیگر قصد ترور روحی با ایجاد فشار روانی روی شخص مورد هدف، دورکردن هویت استفاده فشارهای منظم مستمراست. توجه اینک...