Methods: In this study, cleaning process was studied and analyzed with special reference to cleaning tools. A group of 13 professional cleaners participated in this study. While they performed their normal tasks, their oxygen consumption, heart rate, rating of perceived exertion and postural data were obtained. The perceived exertion during cleaning task using the ‘‘redesigned cleaning tool’’ w...

the objective of this study was to evaluate the presence of perchloroethylene (pce) and trichloroethylene (tce) in dry cleaning shops in tehran, iran. pce and tce are two most prevalent solvents in dry-leaning shops. air and effluent samples were collected in october to december 2011 from 10 dry-cleaning shops. analyses were performed by head-space gas chromatography technique. gas chromatograp...

Bond pad cleaning, prior to wire bonding, through the employment of radio-frequency-driven, lowpressure plasmas has been demonstrated to improve the wire bond pull strength.1 The successful application of plasma technology relies on an optimization of process parameters including process pressure, plasma power, time, and process gas type. These key plasma process parameters and their impact on ...

Inadequate hole cleaning can lead to many problems in horizontal and directional wells. In this work, we tried to investigate the cutting transport phenomenon by an experimental directional drilling simulator, considering the differences between the operational and experimental conditions. The inclination, fluid type (water, foam, viscous, and dense), rotary speed (0 and 110 rpm), nozzle bit si...

In view of the poor effectiveness existing potato cleaning methods in China and reflecting findings a research analysis basic sizes types impurities on tubers, gradient method for based multi-step dry-cleaning wet operation was proposed. The mainly consists cleaning. stage, which combines vibration brushing, could effectively remove such as residual rhizomes, peeled skin, large pieces soil crus...