Slippage

Using fiber reinforced polymer (FRP) bars as an alternative to traditional steel
reinforcement solves durability problems in reinforced concrete structures. This study
investigated the effects of bar slippage on the pre- and post-heating flexural response
of concrete beams reinforced with different FRP and conventional steel bars. A total
of twenty-four control and heat-damaged concrete beams with different FRP/steel
bars were loaded (in triplicates) under a four-point loading configuration to evaluate
their mechanical performance and failure modes while acquiring strains in tension
steel and compression concrete. A new theoretical method was proposed to predict
the load capacities of the beams with consideration of slippage between the FRP bars
and surrounding concrete. The results were then compared with the load capacities
computed using the ACI code that assumes a prefect bond between FRP bars and
concrete. The post-heated concrete beams failed at a relatively low load capacity.
They also presented an increase in deflection and ductility and a decrease in stiffness
and total absorbed energy. The theoretical ultimate load of the FRP-RC beams,
computed on the basis of the ACI code, was overestimated relative to the
corresponding measured values. By contrast, the computations based on the actual

This paper studies the fully distributed formation control problem of multi-robot systems without global position measurements subject to unknown longitudinal slippage constraints. It is difficult for robots to obtain accurate and stable global position information in many cases, such as when indoors, tunnels and any other environments where GPS (global positioning system) is denied, thus it is meaningful to overcome the dependence on global position information. Additionally, unknown slippage, which is hard to avoid for wheeled robots due to the existence of ice, sand, or muddy roads, can not only affect the control performance of wheeled robot, but also limits the application scene of wheeled mobile robots. To solve both problems, a fully distributed finite time state observer which does not require any global position information is proposed, such that each follower robot can estimate the leader’s states within finite time. The distributed adaptive controllers are further designed for each follower robot such that the desired formation can be achieved while overcoming the effect of unknown slippage. Finally, the effectiveness of the proposed observer and control laws are verified by simulation results.

Traditional art viewership is static and places a gap between viewer and art. This chasm hinders relationship between viewer and art. As such, no sense of ‘presentness’, moments of ‘being’, with art exists. An art situation demonstrates that employing art object(s), their Form establishing context for relational understanding, and as Installation, having Zones, necessarily reveal Order and Types that govern moments of presentness through one’s Dual Bodily Unit. Association of Zones, Objects and Ma, employs Zones to measure; peripatetic actions, proprioception to phenomenology and visa-versa; art object(s) perception and relationship; Ma as the settling into space - time intervals that affirm, as methods of engagement, moments of ’presentness’. A “Slippage” occurs between one’s cognitive and corporeal senses. These define interpretations via perceptions. Durational investigation establishes moments of being present. This situation facilitates and transforms; one is free to interpret,...

Traditional art viewership is static and places a gap between viewer and art. This chasm hinders relationship between viewer and art. As such, no sense of ‘presentness’, moments of ‘being’, with art exists. An art situation demonstrates that employing art object(s), their Form establishing context for relational understanding, and as Installation, having Zones, necessarily reveal Order and Types that govern moments of presentness through one’s Dual Bodily Unit. Association of Zones, Objects and Ma, employs Zones to measure; peripatetic actions, proprioception to phenomenology and visa-versa; art object(s) perception and relationship; Ma as the settling into space - time intervals that affirm, as methods of engagement, moments of ’presentness’. A “Slippage” occurs between one’s cognitive and corporeal senses. These define interpretations via perceptions. Durational investigation establishes moments of being present. This situation facilitates and transforms; one is free to interpret,...

Traditional art viewership is static and places a gap between viewer and art. This chasm hinders relationship between viewer and art. As such, no sense of 'presentness', moments of 'being', with art exists. An art situation demonstrates that employing art object(s), their Form establishing context for relational understanding, and as Installation, having Zones, necessarily reveal Order and Types that govern moments of presentness through one's Dual Bodily Unit. Association of Zones, Objects and Ma, employs Zones to measure; peripatetic actions, proprioception to phenomenology and visa-versa; art object(s) perception and relationship; Ma as the settling into space-time intervals that affirm, as methods of engagement, moments of 'presentness'. A " Slippage " occurs between one's cognitive and corporeal senses. These define interpretations via perceptions. Durational investigation establishes moments of being present. This situation facilitates and transforms; one is free to interpret, reinforcing 'presentness', in the Ma of space-time; naturally occurring investigative processes are explorative and active. This produces moments where art and participant share, and, are connected within the same space-time. The I self, subjective, projective, imageless interfaces with the Me object, memory recall self, within the field of art object(s), actualizing moments of presentness. These findings suggest existence is explorative and relational and that one's dual natures, I / Me, are fully equipped and actualized, in a world of art objects, and this art situation creates moments of presentness. Importantly, Art is now brought into a shared situation where one appreciates their 'being' with Art and world.