Masks are the primary tool used to prevent spread of COVID-19 in current pandemic. Tests were carried out determine total pressure drop through materials from which masks made and correlation these results with concentration carbon dioxide inner space mask. The showed that a parameter representing hydraulic losses mask material has significant influence on higher resistances accumulated dioxide...

Electro-hydraulic compact drives (ECDs) are an emerging technology for linear actuation in a wide range of applications. Especially within the low power 5–10 kW, plug-and-play capability, good energy efficiency and small space requirements ECDs render this promising alternative to replace conventional valve-controlled drive solutions. In range, generally rely on passive cooling keep oil system ...

a total number of 259 gram negative bacteria (entero-bacteria) isolated during the years 1973-1974 was examined. these strains were isolated from sick children referred and or hospitalized in a children hospital in tehran. the strains consisted of ; 131e.coli, 52 salmonella, 40 klebsiella, 18 shigella, 13 proteus, 3 enterobacter and 2 citrobacter. sensitivity tests were performed according to t...

Land plants need water to replace the evaporation that occurs while atmospheric CO2 is diffusing into photosynthetic tissue. The water-for-carbon exchange rate is poor, and evolutionary history indicates a progression of innovations for cheap water transport—beginning in order with capillary suction at cell walls, stomatal regulation, hydroids, tracheids, secondary xylem, endodermis, and vessel...

The development of electromechanical actuators (EMAs) is the key technology to build an all-electric aircraft. One of the greatest hurdles to replacing all hydraulic actuators on an aircraft with EMAs is the acquisition, transport and rejection of waste heat generated within the EMAs. The absence of hydraulic fluids removes an attractive and effective means of acquiring and transporting the hea...

Three microbial fuel cells (MFCs) with different volumes (S-, M-, and L-MFCs) were operated at individual flow (phase I) serially connected modes II for forward phase III reverse flow) the same rate. The three MFCs showed voltages power generation according to hydraulic electric connection modes. M- L-MFCs a similar voltage series-forward mode II). principal component analysis (PCA) Pearson cor...

Hydrotropism is the movement or growth of a plant towards water. It type tropism, directional response, that triggered by Plants are able to detect water through various stimuli, including changes in moisture levels and potential. The purpose this study provide an overview how root uptake stabilized. impact hydrotropism on plants can be significant. help survive environments where scarce, it al...