BACKGROUND Amalgam that is used for dental fillings contains approximately 50% elemental mercury. During dental student training, amalgam is often removed by drilling without the use of water spray and suction, which are protective measures in preventing mercury aerosol. In this study we measured mercury vapor levels in ambient air during amalgam removal as is typically performed in dental trai...

This paper discusses a fuzzy logic control system designed to determine, regulate and maintain the amount of suction needed by a robotic gripper system to perform reliable limp material manipulation. A neuro-fuzzy approach is followed to determine the amount of desired suction (depending on experimentally derived data and plant characteristics). A knowledge-based valve controller is then design...

This paper discusses position and suction control of a multi-degree-of-freedom reconfigurable robotic gripper system (RGS) consisting of four arms in a crossbar configuration, with a flat surface, fixed dimensions, suction unit (cup) mounted on each of the four arms. A fuzzy logic based controller has been implemented to regulate, coordinate and maintain the amount of suction generated through ...

Pumping stations play an important role in agriculture development projects. Performance of the pumping stations should satisfy water requirements, and management. There are many problems face these pumping stations affecting their reliability and stability. Hydraulic problems are the most important item in the field of pumping station operation and design. Motivation of this research was prese...

conclusions closed suction caused fewer disturbances in patients’ hemodynamic condition, took shorter time, and is more economical. therefore, this method can replace open suction method in caring of severely critically ill patients. results no significant differences were observed between the two suctioning methods in terms of mean systolic blood pressure (p = 0.075), diastolic blood pressure ...

background critically ill patients under mechanical ventilation require frequent suctioning of airway secretion. closed suction permits suctioning without disconnection from ventilator; so it might decrease hypoxemia and infection rate. objectives this study aimed to evaluate the effect of closed tracheal suction system (ctss) versus open tracheal suction system (otss). patients and methods thi...

abstract background: ventilator-associated pneumonia (vap) is a common side effect in patients with an endotracheal tube. this study aimed to evaluate the effect of an upper respiratory care program on the incidence of vap in mechanically ventilated patients. materials and methods: in this clinical trial, 62 patients with endotracheal tube were selected and randomly allocated to intervention or...

seismic ground motion is profoundly affected by geometrical and mechanical properties of soil deposits overlaying bedrock. local seismic ground response of saturated soil deposits was studied in literature by applying the effects of soil stress state and index properties on the strain-dependent normalized shear modulus reduction, g/g0, and damping ratio, d, curves in an equivalent linear analys...