This study proposes a soft robotic device with slim and flexible body that switches between air blowing suction single airflow control. Suction is achieved by jet flow entraining surrounding air, blocking reversing flow. The thin flap gate enables the switching. Air blocked while closed passes through open. opening closing of are controlled expansion inflatable chambers installed near gate. ext...

Extension of the effective stress concept to unsaturated soils has been a major concern for decades. Recent studies significantly contributed understanding fundamentals behind Bishop's parameter χ, which is generally used define soils. An examination recently proposed methods showed that contribution suction was often overestimated, especially in high range. In this study, considering soil pore...

 In pavement design, the CBR and direct shear tests are two very common laboratory investigations for predicting the strength of a subgrade layer. The relationship between the CBR and water content has been commonly presented in analyses, with the result of the direct shear being expressed from the aspect of effective cohesion and the internal friction angle. Even though most natural soil is in...

A non-linear gas dynamic model is used in this paper to study the pressure pulsations in the intake of a variable speed compressor, since the perturbation pressure in this study is so large that the linear acoustic theory is no longer valid. Friction and heat transfer are considered in the model. Three numerical schemes are applied to solve the governing equations which are non-linear hyperboli...

BACKGROUND During orthopedic operations, such as total hip replacement or total knee replacement, there is a lot of bone debris from bone cutting and reaming that commonly causes surgical suction devices to occlude many times, which can prolong the operative time and increase the amount of bleeding for the patient. MATERIALS AND METHODS We developed a surgical filter suction system that we ca...

We previously developed an in vivo tissue suction-mediated transfection method (denoted as the tissue suction method) for naked nucleic acids, such as plasmid DNA (pDNA) and small interfering RNA (siRNA), in mice. However, it remains unclear whether the suction pressure conditions affect the results of this method. Therefore, in the present study, we assembled a computer system to control the s...

evaluating the application of safe suction criteria by nurses working in intensive care unit in urmia     amirzade n [1] *, baghaei r [2] , feizi a [3] , khorsandi f [4]     received: 19 jan , 2013 accepted: 12 mar , 2013   abstract   background & aims : suction is considered as an essential process to keep the trache tube open for patients under mecanical ventilation.howevereit has detrimental...

Results of high-order direct numerical simulations are summarized for the evolution of crossflow disturbances in incompressible wing-generic boundary-layers with suction at the wall. The concept of smart suction, an adapted combination of the upstream-flow-deformation (UFD) technique and suction, is presented for laminar flow control. In the UFD technique, relatively tightly spaced, useful cros...