This Letter presents the novel experimental observation of long and narrow jets shooting out in disconnecting large elongated bubbles. We investigate this phenomenon by carrying out experiments with various viscosities, surface tensions, densities and nozzle radii. We propose a universal scaling law for the jet velocity, which unexpectedly involves the bubble height to the power 3/2. This anoma...

There is a growing interest among the higher education principals and policy makers to improve teacher evaluation methods and more important than that to use the evaluation data. A number of research studies implied the ineffective instruction of ESP courses in Iran (Atai, 2002; Eslami, 2005; Hayati, 2008; Ahmadi, 2008; Sherkatolabbasi & Mahdavi, 2012; Boniadi, Ghojazadeh & Rahmatvand, 2013). T...

There are many children with disabilities who need specialised devices to communicate and be understood, which poses an added challenge for their caregivers. This study aims diagnose the training needs of informal caregivers concerning high-tech augmentative alternative communication (AAC), enhance use these in home setting. The aim is children’s performance interaction caregivers, improve prac...

While live event experiences have become increasingly mediatized, the prevalence of ephemeral content and diverse forms (semi)private communication in social media platforms complicated study these mediatized as an outsider. This article proposes ethnographic approach to studying from inside, carrying out participatory fieldwork online offline festival environments. I argue that this both stimu...