The article assesses the impact of repeated blasts on stress-strain state shotcreting support, which negatively affects bearing capacity support and can lead to formation local rock falls in places significant degradation strength. Despite fact that a single seismic load usually does not have technical condition dynamic loading development negative processes affect safety. considers unreinforce...

This paper experimentally investigates the behavior of a non-prismatic concrete frame using different types under static and repeated loads. The parametric study includes changing type (conventional concrete, steel fiber reactive powder (SF-RPC) glass (GF-RPC)) loading (static repeated). results were presented discussed effect SF-RPC GF-RPC on behavior, compared with conventional through first ...

background: one of the methods used for joining metals together is welding, which can be carried out using different techniques such as electric spot welding. this study evaluated the effect of electric spot welding on the load defl ection rate of stainless steel and chromium-cobalt orthodontic wires. materials and methods: in this experimental-laboratory study, load defl ection rate of 0.016 ×...

This research study focused on the long-term and repeated load behavior of wood-concrete composite beams in which the wood layer is composed of recycled utility poles. Previous research studies have found this type of a beam to have high efficiency and to be a potentially viable replacement for short span bridges on low traffic roadways. Since both wood and concrete exhibit time-dependent behav...

BACKGROUND Long commutes by car are stressful. Most research studying health effects of commuting have summarized cross-sectional data for large regions. This study investigated whether the levels of stress and individual characteristics among 30-60 min car commuters were similar across different places within the county of Scania, Sweden, and if there were changes over time. METHODS The stud...

In the design of a randomized clinical trial with one pre and multiple post randomized assessments of the outcome variable, one needs to account for the repeated measures in determining the appropriate sample size. Unfortunately, one seldom has a good estimate of the variance of the outcome measure, let alone the correlations among the measurements over time. We show how sample sizes can be cal...