Less is more: energy-efficient mobile sensing with SenseLess

Workshop held as part of ACM SIGCOMM 2009We present SenseLess, a system that leverages the different energy consumption characteristics of sensors to maximise battery life in mobile-sensing applications. We use the less expensive sensors more often, thereby enabling us to use the more expensive sensors less frequently. In the context of location-aware services, experimental results indicate that for a typical indoor and outdoor walk, compared to a simple GPS-based system, our SenseLess system can reduce energy consumption by more than 58% when determining a user's location, while maintaining the fidelity of the sensed data. This extends the battery life of a typical handheld device from 9 hours to 22 hours.Postprin

The emotional labour of doctoral criminological researchers

Embarking upon empirical qualitative research can be a daunting and emotional task, particularly for those who are new to research and for those who research vulnerable groups and emotive topics. Doctoral criminological researchers transect these realms, often making their research experiences acutely emotional and challenging. In addition, researchers must be able to perform emotional labour as an important part of their professional practice. Based on 30 semi-structured interviews, this is the first study to explicitly explore the emotional labour of criminological researchers. Using the lens of emotional labour, the performance and impact of undertaking qualitative data collection in doctoral research is examined. From the interview data, three main themes are discussed: emotional labour, the consequences of performing that emotional labour and coping mechanisms to deal with those consequences. The article concludes with recommendations around support and training for PhD candidates, their supervisors and the higher education sector more broadly

A direct proof of Z-stability for AH algebras of bounded topological dimension

We prove that a unital simple approximately homogeneous (AH) C*-algebra with no dimension growth absorbs the Jiang-Su algebra tensorially without appealing to the classification theory of these algebras. Our main result continues to hold under the slightly weaker hypothesis of exponentially slow dimension growth.Comment: 15 pages, no figure

Bantu Education

In lieu of an abstract, below is the essay\u27s first paragraph.South Africa has had to deal with issues of racial differences since colonial times. British settlers came into this foreign country and claimed it as their own. Until recently, these settlers were able to treat the black people of South Africa as a subservient and inferior race as a result of the system of apartheid. Many different strategies were needed to keep this imbalanced system in place. One such strategy was employed through education, or a lack thereof. As long as blacks received a lower quality education than whites, they could not hope to become the political or social equals of whites

An Abstract Machine for the Stochastic Bioambient calculus

AbstractThis paper presents an abstract machine for the stochastic bioambient calculus. The abstract machine is proved sound and complete with respect to a novel stochastic semantics, and is also shown to preserve the reduction probabilities of the calculus. The machine is implemented as an extension to an existing simulator for stochastic pi-calculus