ORBS and the limits of static slicing

Observation-based slicing is a recently-introduced, language-independent, slicing technique based on the dependencies observable from program behaviour. Due to the wellknown limits of dynamic analysis, we may only compute an under-approximation of the true observation-based slice. However, because the observation-based slice captures all possible dependence that can be observed, even such approximations can yield insight into the limitations of static slicing. For example, a static slice, S that is strictly smaller than the corresponding observation based slice is guaranteed to be unsafe. We present the results of three sets of experiments on 12 different programs, including benchmarks and larger programs, which investigate the relationship between static and observation-based slicing. We show that, in extreme cases, observation-based slices can find the true static minimal slice, where static techniques cannot. For more typical cases, our results illustrate the potential for observation-based slicing to highlight unsafe static slices. Finally, we report on the sensitivity of observation-based slicing to test quality.

Exploring the Impact of a Difficult Breastfeeding Experience on Maternal Identity: A Narrative Analysis

Introduction: Due to the implied health benefits for mother and baby, breastfeeding has become a key public health issue. Literature reviewed highlighted the ‘medical’ and ‘natural’ mother discourse which surrounds motherhood and impacts on women’s decisions to breastfeed. Whilst the emotional and physical strains of a difficult experience have been explored, it is unclear how these experiences impact on women’s identities as mothers and in what ways women are able to narrate and share their embodied experiences. Methods: Seven first time mothers who described themselves as having had a difficult breastfeeding experience were interviewed to gather data pertaining to how mothers construct narratives of breastfeeding and the impact of these narratives on their identity as mothers. An interest in both socio-political discourse and embodiment theory derived from the literature review led to the use of visual methods in eliciting narratives and the employment of a critical narrative analysis in exploring the data gathered. Findings: The participants’ narratives drew from ‘medical’ and ‘natural’ mother discourses and were found to constrain subjective experience and leave participants with feelings of guilt, frustration and loss. A prevailing assumption that unruly, excessive bodies must be controlled by a rational ‘mind’ led to the body becoming a site for control and resistance for participants as they attempted to conform to norms of motherhood and breastfeeding. Discussion: Results identified the ways in which women as mothers can see their subjective experiences diminished and their voices silenced due to a lack of available discourse and entrenched ideologies surrounding the ‘good’ mother. It is suggested that adopting a social justice agenda within therapeutic practice might prevent the internalisation of oppressive discourse which can lead to mothers’ psychological distress. Moreover, it is suggested that exploring the body in therapy might resist a mind/body dualism and lead to increasingly compassionate and accepting relationships with our bodies; in turn increasing awareness of subjective experience.