Article history: Received: 11.03.2013. Received in revised form: 02.04.2013. Accepted: 02.04.2013. This paper puts forward an innovative criterion in the cellar automata (CA) technique for both matching zone similarity and mapping failure pattern of masonry wall panel. The criterion proposed in this paper is a two-step matching method. Firstly, calculate the state values of the cells in the bas...

Pattern lock is widely used as a mechanism for authentication and authorization on Android devices. This paper presents a novel video-based attack to reconstruct Android lock patterns from video footage filmed using a mobile phone camera. Unlike prior attacks on pattern lock, our approach does not require the video to capture any content displayed on the screen. Instead, we employ a computer vi...

ANALYTICAL AND EXPERIMENTAL STUDY OF INVESTMENT CASTING WITH LASER STEREOLITHOGRAPHY MODELS by Wen-Long Yao This dissertation presents an analytical and experimental investigation of ceramic shell cracking during the burnout process in investment casting with internally webbed laser stereolithography (SLA) patterns. Included in the consideration are the cracking temperature of the ceramic shell...

(This is part 2, continued from “Use of harsh Wafer Probing to Evaluate Traditional Bond Pad Structures”). Goals for circuit under pad (CUP) in aluminum – silicon dioxide (Al – SiO2) based IC pad structures include the design of metal interconnects in all layers beneath the pad Al, and the ability to withstand harsh probing and wirebonding stress without SiO2 cracking, without deforming or bend...

Article history: Received: 08.10.2013. Received in revised form: 21.11.2013. Accepted: 25.11.2013. This study presents a cellular automata (CA) method to map the cracking patterns of laterally loaded masonry wall panels with openings. Firstly, the central point displacement of each CA cell is calculated from the finite element method (FEM). Then, the displacements are normalized to form the CA ...

The cracking and delamination of TiN-coated hardmetals (WC-Co cemented carbides) when subjected to Brale indentation were studied. Experimental variables were substrate microstructure related to low (6%wt. Co) and medium (13%wt. Co) binder content, and surface finishes associated with grinding and polishing stages before film deposition. Brale indentation tests were conducted on both coated and...

Image processing technology plays an important part in the analysis and evaluation of pavement surface cracking. The pattern recognition method for crack geometry proposed in this paper makes it possible to extract data necessary for evaluating the extent and severity of cracking quantitatively. In this newly developed method, low-resolution images are used first to extract crack regions, and t...

Manufacturing a metal product with complex geometry usually will related to Investment Casting (IC) process as the process has the highest capability to deliver the intended objective. But producing the wax pattern for the process has already consumes half of the time of overall process. Rapid Prototyping (RP) is considered to be a solution as it capable to reduce the time in a large margin. Co...