Abstract. Improved Giant MagnetoResistance Magnetometers (IGMRM) offers many advantages for subsurface cracks detection. This paper presents new detection opportunity of fatigue cracks close to fasteners or rivets with an improved rotating head. The latter was developed around an IGMRM and a well design electromagnetic flux focuser. The capabilities of the system for the one to the third alumin...

This paper proposes a formal definition of design problem using the axiomatic theory of design modeling. Based on the concept of product system and an informal description of design problem, a design problem is formulated into three parts: environment, structural requirements, as well as performance requirements. On the basis of this formulation, both structural requirements and performance req...

In Pulsed Eddy Current (PEC) testing, the response feature of one-dimensional magnetic field component, perpendicular to the conductor’s surface, is used to detect and quantify the defects. It is not sufficient for signal interpretation and noise suppression. A novel PEC probe, which consists of a tangential driver-coil and three orthorhombic pickup coils, is introduced in this paper. It is gre...

Riveting tasks in aircraft manufacturing results in exposure to vibration from both rivet guns and bucking bars. Long term exposure to vibration has been associated with symptoms of vibration white finger and musculoskeletal disorders. Four different bucking bars of the same shape but different material and mass characteristics (90% tungsten, >90% tungsten, cold rolled and stainless steel) were...

Streptococcus pyogenes is a globally prominent bacterial pathogen that exhibits strict tropism for the human host, yet bacterial factors responsible for the ability of S. pyogenes to compete within this limited biological niche are not well understood. Using an engineered recombinase-based in vivo expression technology (RIVET) system, we identified an in vivo-induced promoter region upstream of...

We give a review of the relativistic stochastic process denominated with the acronym ROUP, standing for relativistic Ornstein-Ohlenbeck process. This stochastic process was introduced in 1997 by Debbasch, Mallick and Rivet [J. Stat. Phys. 88:945 966 ] as a simpli ed model of irreversibility in a relativistic framework. This allows an investigation of the paradox arising when examining the large...

License plate recognition (LPR) plays a major role in this busy world, as the number of vehicles increases day by day, theft of vehicles, breaking traffic rules, entering restricted area are also increases linearly, so to block this act license plate recognition system is designed. License Plate Recognition (LPR) systems basically consist of 3 main processing steps such as: Detection of number ...

The fatigue crack growth behavior of a cracked and patch-repaired AA2024-T3 panel has been monitored by acoustic emission (AE). It was found that the overall crack growth rate was reduced and the crack propagation into the adjacent rivet hole was also retarded by introducing the patch repair. AE signals due to crack growth after the patch repair and those due to disbonding of the aluminum-patch...