The maize root system is crucial for plant establishment as well as water and nutrient uptake. There is substantial genetic and phenotypic variation for root architecture, which gives opportunity for selection. Root traits, however, have not been used as selection criterion mainly due to the difficulty in measuring them, as well as their quantitative mode of inheritance. Seedling root traits offer an opportunity to study multiple individuals and to enable repeated measurements per year as compared to adult root phenotyping. We developed a new software framework to capture various traits from a single image of seedling roots. This framework is based on the mathematical notion of converting images of roots into an equivalent graph. This allows automated querying of multiple traits simply as graph operations. This framework is furthermore extendable to 3D tomography image data. In order to evaluate this tool, a subset of the 384 inbred lines from the Ames panel, for which extensive genotype by sequencing data are available, was investigated. A genome wide association study was applied to this panel for two traits, Total Root Length and Total Surface Area, captured from seedling root images from WinRhizo Pro 9.0 and the current framework (called ARIA) for comparison using 135,311 single nucleotide polymorphism markers. The trait Total Root Length was found to have significant SNPs in similar regions of the genome when analyzed by both programs. This high-throughput trait capture software system allows for large phenotyping experiments and can help to establish relationships between developmental stages between seedling and adult traits in the future.

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Objectives: The aim of this systematic review was to identify the effectiveness of breast massage as a treatment for women with breastfeeding problems. More specifically, the objective was to identify if breast massage as an intervention led to less pain or increased milk supply, or assisted in a reduction or resolution of blocked ducts, breast engorgement and mastitis. Introduction: Breastfeeding protects babies against many illnesses, and the health benefits for women have been well documented. However, breastfeeding rates steadily drop to approximately 15% by six months, which is the World Health Organization's recommended length of time for exclusive breastfeeding. Breastfeeding problems such as blocked ducts, breast engorgement and mastitis are major complications attributing to the decline in breastfeeding rates. Breast massage may relieve pain and resolve symptoms associated with conditions that contribute to discontinued breastfeeding. Inclusion criteria: This review considered both experimental and epidemiological study designs and included breastfeeding women of any age, parity or geographical location. The types of interventions considered for inclusion were any type of breast massage that was offered to women for breastfeeding problems. Comparators included the usual care provided to women with breastfeeding problems. Primary outcomes of interest were an increase in breast milk supply, reduction of breast pain, and symptom resolution of blocked ducts, engorgement and mastitis. Secondary outcomes included duration of breastfeeding. Methods: Studies published from 1980 to 2017 in English and Japanese were considered for inclusion in this review. The databases searched with the majority of results included CINAHL, Cochrane Library, Embase, PubMed, Science Direct, Scopus and Web of Science. Search for unpublished studies included Google Scholar, ClinicalTrials.gov and ProQuest Dissertations and Theses. Results: There were six studies included in this review: three randomized controlled trials and three quasi-experimental studies. There was considerable heterogeneity of study outcome measures, and the use of unvalidated tools in many of the studies led to the inability to pool the results. Furthermore, the heterogeneity of the interventions themselves coupled with small sample sizes for each study greatly decreased generalizability of the outcomes and reduced the overall effectiveness of the interventions. However, all included studies reported a reduction in pain regardless of the breast massage technique used. Overall, varying types of breast massage were helpful in reducing immediate pain and resolving symptoms. Conclusions: Overall, different types of breast massage were reported as effective in reducing immediate pain for the participants. However, the lack of detailed explanation of the breast massage technique and the extensive training needed to undertake the breast massage decrease the ability to replicate the results. These outcomes may be useful for healthcare professionals caring for women with breastfeeding problems. Future research needs include validating a universal measurement tool for breastfeeding problems and the need for more robust randomized controlled trials, particularly in vulnerable groups such as mothers of preterm infants. Longer follow-up periods are also suggested to establish if breast massage impacts breastfeeding duration.

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The accuracy of machine learning tasks critically depends on high quality ground truth data. Therefore, in many cases, producing good ground truth data typically involves trained professionals; however, this can be costly in time, effort, and money. Here we explore the use of crowdsourcing to generate a large number of training data of good quality. We explore an image analysis task involving the segmentation of corn tassels from images taken in a field setting. We investigate the accuracy, speed and other quality metrics when this task is performed by students for academic credit, Amazon MTurk workers, and Master Amazon MTurk workers. We conclude that the Amazon MTurk and Master Mturk workers perform significantly better than the for-credit students, but with no significant difference between the two MTurk worker types. Furthermore, the quality of the segmentation produced by Amazon MTurk workers rivals that of an expert worker. We provide best practices to assess the quality of ground truth data, and to compare data quality produced by different sources. We conclude that properly managed crowdsourcing can be used to establish large volumes of viable ground truth data at a low cost and high quality, especially in the context of high throughput plant phenotyping. We also provide several metrics for assessing the quality of the generated datasets.

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Background About a third of women experience severe back pain during labour. Injecting small volumes of intracutaneous sterile water into the lumbar region can be used to relieve this pain, however the procedure is controversial and previous reviews call for high quality trials to establish efficacy. We evaluated the impact on birth outcomes and analgesic effects of sterile water injections. Methods A multicentre, double-blind trial undertaken between December 2012 and December 2017 in one British and 15 Australian maternity units. Women experiencing severe back-pain in labour were assigned (1:1) by an independently generated randomisation schedule stratified by site to injections of either sterile water or saline placebo. Participants and caregivers were blinded to group allocation. The primary outcome was caesarean delivery rate. Main secondary outcomes included at least 30% or 50% reduction in self-reported pain scores at 30, 60 and 90 minutes after treatment. Intention to treat analysis were used and the level of significance for the multiple clinical outcomes was set at p <0.001 with the Bonferroni correction applied. The study is registered with the ACTRN Registry number, ACTRN1261100022195 Findings Between December 9, 2012, and December 15, 2017, 1166 women were recruited and randomised: 587 women received sterile water injections (SWI) and 579 a saline placebo. Seven women in the SWI group and 12 in the placebo group were excluded as consent was not completed, leaving 580 and 567, respectively, included in the analysis. The proportions of caesarean delivery were 17·1% (82 of 580) in the SWI group and 14·8% (82 of 567) in the placebo (RR 1·16, 95% CI 0·88–1.51; p = 0·293). At 30 min post treatment 60·8% (330 of 543) of women in the SWI group reported a 30% reduction in self-reported pain compared to 31·4% (163 of 520) placebo (RR 1·94, 95% CI 1·68–2·24; p =<0·001) and 43·3% (235 of 534) SWI reported a 50% reduction versus 18·1% (94 of 520) placebo (RR 2·39, 95% CI 1·95–2·94; p =<0·001). The analgesic effect of SWI compared to placebo remained significant at 60 and 90 min post-treatment. There were no significant differences in other maternal or neonatal outcomes. Interpretation Compared to placebo, injections of sterile water did not reduce rates of caesarean delivery. For the main secondary outcome of pain relief the intervention did result in significantly more women reporting at least 30% and 50% reduction in pain for up to 90 min. Water injections have no effect on birth outcomes though can be an effective treatment for the relief of labour-related back pain. Funded by the National Health and Medical Research Council.

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