This thesis presents a study of the effect of controllable riveting parameters, mainly squeeze force, rivet length, rivet diameter tolerance, hole countersunk depth and hole diameter tolerance, on the quality of formed rivet. The quality of a formed rivet is determined by the geometry of its head formation and the extent to which the hole is filled. The study determines maximum allowable tolera...

In 1917, Alfred Mayor surveyed a 270 m transect on reef flat American Samoa. Eleven surveys were conducted the from 1917 to 2019. The coral community crest was resilient over century, occasionally being seriously damaged but always recovering rapidly. contrast, originally most dense has been steadily deteriorating throughout century. Resilience of communities in regions high wave energy crests ...

Coring is considered to provide the best estimate of concrete compressive strength in existing structures and commonly used calibrate Non-Destructive Moderately Destructive Techniques. Historical concrete, produced pre-code period until ‘20s, significantly differs from modern due lack standardization, improper rules thumbs aggregate shape (round, smooth often excessively large aggregates) propo...

To assess the paleo-permeability structure of oceanic crust, we used 3-D X-ray Computed Tomography (XCT) images to quantify distribution and geometry mineral veins in core samples from Oman Drilling Project Holes GT1A, GT2A, GT3A, which correspond upper lower crustal sections Samail ophiolite. We developed a new method that automatically detects XCT based on iterative adaption two-step Hough tr...

BACKGROUND A single drilled tunnel from the lateral mastoid cortex to the cochlea via the facial recess is essential for minimally invasive cochlear implant surgery. This study aimed to explore the safety profile of this kind of new image-guided and bi-planar device-assisted surgery procedure in vitro. METHODS Image-guided minimally invasive cochlear implantations were performed on eight cada...

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This study examines the capability of the Relevance Vector Machine (RVM) and Multivariate Adaptive Regression Spline (MARS) for prediction of ultimate capacity of driven piles and drilled shafts. RVM is a sparse method for training generalized linear models, while MARS technique is basically an adaptive piece-wise regression approach. In this paper, pile capacity prediction models are developed...

Increasing the number of cores integrated on a chip and the problems of system on chips caused to emerge networks on chips. NoCs have features such as scalability and high performance. NoCs architecture provides communication infrastructure and in this way, the blocks were produced that their communication with each other made NoC. Due to increasing number of cores, the placement of the cores i...

the drilling is well known as one of the most common hole making processes in the industry.due to close tolerance requirement for drilled holes in the most of work pieces, onlinecontrolling of the diameter of drilled holes seems to be necessary. in the current work, an onlinedimensional controlling system was developed for drilling process. doing this, drilling processwas executed in different ...