A nonlinear elastic foundation model has been developed to predict the mixed-mode (modes I and II) delamination failure of laminated composites. Two types of nonlinear elastic foundations were used to represent pure mode I and pure mode II components of the material failure ahead of the crack tip. One is a tension spring foundation for mode I component and the other is a shear spring foundation...

By numerically simulating the Bray-Liebhafsky (BL) reaction (the hydrogen peroxide decomposition in the presence of hydrogen and iodate ions) in a continuously fed well stirred tank reactor (CSTR), we find "structured" types of chaos emerging in regular order with respect to flow rate as the control parameter. These chaotic "structures" appear between each two successive periodic states, and ha...

The initial stage of fretting fatigue crack growth is significantly influenced by tangential force induced by fretting action along the contact surface where a mixed-mode crack growth is involved. Fretting crack behavior of aluminum alloy 2024 was studied, taking into account the problem of contact asperities. Finite element was used for the determination of the stress field near the contact su...

Background Population-based surveys currently face the problem of decreasing response rates. Mixed-mode designs are now being implemented more often to account for this, to improve sample composition and to reduce overall costs. This study examines whether a concurrent or sequential mixed-mode design achieves better results on a number of indicators of survey quality. Methods Data were obtain...

q-mode hierarchical cluster (hca) and principal component analysis (pca) were simultaneously applied to groundwater hydrochemical data from the three times in 2004: june, september, and december, along the ain azel aquifer, algeria, to extract principal factors corresponding to the different sources of variation in the hydrochemistry, with the objective of defining the main controls on the h...

Static mixed-mode presentations consisting of verbal explanations illustrated with diagrams have long been used to communicate information. With the advent of multimedia, such presentations have become dynamic, by migrating from paper to the computer and by adding interactivity and animation. The conventional wisdom is that computer-based multimedia presentations are better than printed present...

OBJECTIVE This exploratory study examined potential mode effects (web versus U.S. mail) in a mixed mode design survey of alcohol use at eight U.S. colleges. METHODS Randomly selected students from eight U.S. colleges were invited to participate in a self-administered survey on their alcohol use in the spring of 2002. Data were collected initially by web survey (n=2619) and non-responders to t...

BACKGROUND The School Health Policies and Programs Study (SHPPS) is a national study periodically conducted to assess school health policies and programs at the state, district, school, and classroom levels. For SHPPS 2006, district-level questionnaires were designed for telephone administration, but mixed-mode data collection that also used paper-and-pencil mail questionnaires was required to ...

~ Mixed-mode parallel processing systems are capa¬ ble of executing in either SIMD (synchronous) or MIMD (asyn¬ chronous) modes of parallelism. The ability to switch between the two modes at instruction level granularity with very little overhead allows the parallelism mode to vary for each portion of an algorithm. To fully exploit the capability of intermixing both SIMD and MIMD operations wit...

This paper presents results of a design that uses CMOS current mode logic that can be used to implement the high precision, speed critical elements of the mixed-signal systems. The design is based upon the 0.25-μm CMOS TSMC process. The propagation delays of the new current mode logic are compared to those of equivalent gates implemented in conventional CMOS logic. The results show a propagatio...