Validated 3D solid finite element (FE) models offer an accurate performance of buried pipelines at earthquake faults. However, it is common to use a beam–spring model for the design pipelines, and all guidelines are fitted this modeling approach. Therefore, study has focused on (1) improvement techniques in FE approach reproduction realistic (2) determination appropriate damage criterion models...

Subsea pipelines buried in the seabed may undergo large lateral displacement under environmental, operational, and accidental loads at different interaction rates hence drainage conditions. The undrained shear strength is commonly used practice to assess pipe-soil assuming a sufficiently high rate. This approach neglects consolidation effects rate-dependent response of soil significantly undere...

This paper consists of a literature review on the latest research progress about lateral buckling submarine pipelines under high temperature (HT) and pressure (HP). First, main general assumptions simplifications made in context pipe are summarized order to better understand practical behavior pipelines. The governing equations uniaxial compression then derived. Next, controversial but widely d...

We demonstrate spectral beam combining of a 980 nm tapered diode laser bar. The combined beam from 12 tapered emitters on the bar yielded an output power of 9.3 W at 30 A of operating current. An M2 value of 5.3 has been achieved along the slow axis. This value is close to that of a free running single tapered emitter on the bar at the same current level. The overall spectral beam combining eff...

Unburied subsea pipelines under high-temperature conditions tend to relieve their axial compressive stress by forming localised lateral buckles. This phenomenon is traditionally studied the assumption of a specific deflection profile (mode) consisting fixed number lobes. We study thermal buckling as genuinely applying homoclinic (‘flat’) boundary conditions. By not having assume particular mode...

be from pipe and connection breaks rather than structural failure of distribution reservoirs (as long as the reservoirs have been designed for lateral loading). Most of the examples of storage tanks and distribution reservoirs impacted by the 1994 Northridge and 1995 Hyogo-ken Nanbu earthquakes appear to have been of steel construction rather than of reinforced concrete or prestressed concrete ...

The adoption of Health IT has been argued to bring about improvements in adopting hospitals. However, examining a panel of hospitals for the adoption of IT, we find that close to 50% of hospitals that adopt a health IT system go on to stop using it during the duration of our panel.1 We find that smaller hospitals and hospitals that are located in areas that have low IT-Intensity are more likely...