The transient response of a millimeter-sized sessile droplet under electrical actuation is experimentally investigated. Under DC actuation, the droplet spreading rate increases as the applied voltage is increased due to the higher electrical forces induced. At sufficiently high DC voltages, competition between the electrical actuation force, droplet inertia, the retarding surface tension force ...

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Social contact frequency is a well-defined and relatively objective measure of social relationships, which according to many studies is closely associated with health and longevity. However, no previous meta-analysis has isolated this measure; existing reviews instead aggregate social contact with other diverse measures of social support, leaving unexplored the unique contribution of social con...

OBJECTIVES Based on the life course perspective and gender differences in stepparental roles, this study examines frequency of social contact between mid- to late-life stepparents and their stepchildren after stepparents' marriage to their stepchildren's biological parent has been dissolved through widowhood or divorce. METHOD Using 5 waves of panel data on stepparent-stepchild pairs from the...

Background: Estimation of the size of hidden and hard-to-reach sub-populations, such as drug-abusers, is a very important but difficult task. Network scale up (NSU) is one of the indirect size estimation techniques, which relies on the frequency of people belonging to a sub-population of interest among the social network of a random sample of the general population. In this study, we estimated ...

When a train runs at high speed, affected by the structural characteristics of catenary, contact force changes periodically with span and dropper spacing. However, as running speed increases, periodic signal owing to fluctuation catenary vibration pantograph, which directly affects stable between pantograph catenary. Therefore, based on simulation research method, this study uses time–frequency...

vibration generated by vehicles during road transport has an important effect on the agricultural products damage process, particularly vegetable and fruit. modulus of elasticity is one of the most important mechanical properties of fruits and its variation can be described as one of the damage criteria during transportation. this research was conducted to evaluate the effects of vibration para...

objective:mold contamination of cakes and the possibility of mold growth can pose a serious health problem. bakery products include various ingredients, which regularly contain molds. these microorganisms on cakes can come from the air, contaminated packaging materials and other sources.methods: in this study, a total of 500 fungal isolates representing 36 species, were identified from cake sam...