170,564 research outputs found
Holocene evolution of a barrier-spit complex and the interaction of tidal and wave processes, Inskip Peninsula, SE Queensland, Australia
No full textThis paper presents a reconstruction of the Holocene evolution of the Inskip Peninsula in SE Queensland. The peninsula links two major dune fields, the Cooloola Sand Mass to the south and K’gari (Fraser Island) to the north. Geomorphic features of this peninsula include remnant parabolic dunes, numerous beach ridges with foredunes, and a series of spits. Together these features provide insight into Holocene coastal evolution and changing marine conditions. A remnant beach ridge/foredune complex at the northern portion of Inskip may have been connected to K’gari and a river/tidal channel near Rainbow Beach township which separated it from the Cooloola Sand Mass to the south. This channel avulsed northward in the early mid-Holocene (after 8.8 ka) with spit development from the south. This was followed by a phase of beach-ridge/foredune complex development that started by ~6.7 ka. Stratigraphic evidence from the highest and best developed parabolic dunes in the northern portion of Inskip Peninsula indicates dune development from the mid-Holocene beach complex by 4.8 ka. Beach ridges with foredunes continued to prograde but notably declined in size during the late-Holocene. In the latest Holocene (<4.8 ka) many of the late-Holocene beach ridges/foredune complexes have been truncated by a re-orientation of the shoreline and longshore sediment transport has promoted the growth of the modern spit at the northern end of the peninsula. Erosive and longshore processes continue to be highly active because of tidal interactions between Great Sandy Strait and the Coral Sea. This detailed study of Inskip Peninsula’s evolution aids significantly in future coastal management decisions, and provides evidence for World Heritage Area extension for the Cooloola Sand Mass, including the incorporation of Inskip Peninsula itself. It also contributes to the global understanding to coastal evolution in an area of strong wave and tidal interaction.</p
Modifiable early-life risk factors for childhood adiposity and overweight: an analysis of their combined impact and potential for prevention
No full textBackground: early life may be a “critical period” when appetite and regulation of energy balance are programmed, with lifelong consequences for obesity risk. Insight into the potential impact of modifying early-life risk factors on later obesity can be gained by evaluating their combined effects.Objective: the objective was to examine the relation between the number of early-life risk factors and obesity outcomes among children in a prospective birth cohort (Southampton Women's Survey).Design: five risk factors were defined: maternal obesity [prepregnant body mass index (BMI; in kg/m2) >30], excess gestational weight gain (Institute of Medicine, 2009), smoking during pregnancy, low maternal vitamin D status (<64 nmol/L), and short duration of breastfeeding (none or <1 mo). Obesity outcomes examined when the children were aged 4 and 6 y were BMI, dual-energy X-ray absorptiometry–assessed fat mass, overweight, or obesity (International Obesity Task Force). Data were available for 991 mother-child pairs, with children born between 1998 and 2003.Results: of the children, 148 (15%) had no early-life risk factors, 330 (33%) had 1, 296 (30%) had 2, 160 (16%) had 3, and 57 (6%) had 4 or 5. At both 4 and 6 y, there were positive graded associations between number of early-life risk factors and each obesity outcome (all P < 0.001). After taking account of confounders, the relative risk of being overweight or obese for children who had 4 or 5 risk factors was 3.99 (95% CI: 1.83, 8.67) at 4 y and 4.65 (95% CI: 2.29, 9.43) at 6 y compared with children who had none (both P < 0.001).Conclusions: having a greater number of early-life risk factors was associated with large differences in adiposity and risk of overweight and obesity in later childhood. These findings suggest that early intervention to change these modifiable risk factors could make a significant contribution to the prevention of childhood obesity
Islam in Iberia or Iberian Islam: sociobioarchaeology and the analysis of Emerging Islamic Identity in Early Medieval Iberia
No full textThis research aims to demonstrate how archaeology can contribute to the analysis of religion and religious change. By viewing religion as a social construct, that takes meaning within its own context, the analysis of material culture provides an opportunity to look at long term religious change. This is because while religion strongly influences material culture, it is also reproduced by it. In particular, the body is critical in recreating and negotiating ideology due to physical conformity to religious ideals, which actively constructs identity. As bone adapts to reflect the physical strain placed on it during life, the analysis of changes in activity-related skeletal modifications provides a mechanism for assessing whether religious identity, and therefore ideology, changed and adapted over time. When combined with other evidence from material culture and historic sources, this social-cultural approach explores the development of religion and its role as a structuring principle, but also how it is influenced by other social, political and historic factors.This was demonstrated through the analysis of physical activity patterns from skeletal material from early Medieval Islamic Iberia (al-Andalus) AD 711- 1200, a region that underwent rapid social change with the emergence of Islam into a previously Christian state. Islam, as a historicx religion, has well established religious traditions. A comparison of ideal behaviour and actual behaviour, as evidenced through activity patterns, was carried out in order to analyse the impact of other social factors on identity in the region. In particular, this thesis focused on whether ideals surrounding gender division and prayer were adhered to in al-Andalus. Entheseal changes, osteoarthritis, non-pathological particular modifications and bone morphology data from Islamic and pre-Islamic individuals from the Islamic cemetery at Écija, Sevilla, and the pre-Islamic basilica at Cortijo de Coracho, Córdoba were compared. A distinct hange in activity patterns occurred with the emergence of Islam. A greater gendered division of labour was identified in the Islamic group, as well as possible evidence for the adoption of ritual prayer and reduced female mobility. The emergence of an Islamic identity was supported by clear trends in burial data and historic sources. Diachronic analysis of Islamic data implied that adherence to Islamic tradition appeared to strengthen over time. Overall, this research appeared to support historical documentation which suggests an orthodox Islamic identity in Iberia. To understand the emergence of an orthodox Islamic Iberian entity, important social and political factors were considered. Firstly, proximity to Christianity meant the observance of Islamic tradition was important for creating a distinction between ‘us’ (Muslims) and ‘them’ Christians. This became more important later when religious tensions increased in Iberia, where the Christian north organised into a credible threat to the Islamic South, but also in the east, with the initiation of the crusades. Secondly, the arrival and staunch Caliphal support of Maliki law, which has strong emphasis on Qur’anic rituals. Thirdly, Écija, is close to Córdoba, the capital of al-Andalus, and traditions could have spread easily from Córdoba along well stablished trade routes. This research therefore demonstrated that Islamic identity, and therefore Islam in Iberia was a product of the interpretation of tradition in a particular context, thus demonstrating the unique nature of Iberian Islam
Socioeconomic lifecourse influences on women's smoking status in early adulthood.
No full textStudy objective: To incorporate women’s domestic trajectories and circumstances into analyses of the socioeconomic influences on women’s smoking status (current and former smoking) in early adulthood. Design: Cross sectional survey Setting: Southampton, UK. Participants: 8437 women aged 25–34 recruited from 1998–2002 via patient lists of general practices Main results: Domestic lifecourse factors contributed to the odds of being a current smoker and former smoker in models that included conventional measures of the socioeconomic lifecourse. Early motherhood, non-cohabitation, and lone motherhood increased the odds of smoking; early motherhood and non-cohabitation reduced the odds of former smoking. For example, relative to childless women, odds ratios (OR) for women who had become mothers <20 years were 1.71 for smoking and 0.76 for former smoking. The effects of education and current SEP remained strong with the inclusion of childbearing and cohabitation variables for both outcomes. For instance, compared with women in education to age 22, the odds ratio for smoking for those leaving school 16 was 3.37 and for former smoking was 0.42. Conclusions: Both the conventionally measured socioeconomic lifecourse and the domestic lifecourse contributed separately to the odds of smoking and former smoking, suggesting that lifecourse analyses should incorporate women’s domestic circumstances as an important pathway of influence on their smoking status in early adulthood
Dietary patterns in infancy: the importance of maternal and family influences on feeding practice
No full textIt is not known what constitutes an optimal diet in infancy. There are relatively few studies of weaning practice in the UK, and there is a need for prospective data on the effects of infant diet and nutrition on health in later life. We describe the dietary patterns, defined using principal components analysis of FFQ data, of 1434 infants aged 6 and 12 months, born between 1999 and 2003. The two most important dietary patterns identified at 6 and 12 months were very similar. The first pattern was characterised by high consumption of fruit, vegetables and home-prepared foods ('infant guidelines' pattern). The second pattern was characterised by high consumption of bread, savoury snacks, biscuits and chips ('adult foods' pattern). Dietary pattern scores were correlated at 6 and 12 months (r 0.46 'infant guidelines'; r 0.45 'adult foods'). These patterns, which reflect wide variations in weaning practice, are associated with maternal and family characteristics. A key influence on the infant diet is the quality of the maternal diet. Women who comply with dietary recommendations, and who have high intakes of fruit and vegetables, wholemeal bread and rice and pasta, are more likely to have infants who have comparable diets - with high 'infant guidelines' pattern scores. Conversely, women whose own diets are characterised by high intakes of chips, white bread, crisps and sweets are more likely to have infants who have high 'adult foods' pattern scores. The effects of these patterns on growth and development, and on long-term outcomes need to be investigated
Similar maternal and paternal relationships with offspring bone mass do not exclude an intrauterine mechanism: evidence from Southampton Women's Survey
No full textMusic in the Movies: an investigation into Creative Music Search
No full textMusic is widely used to accompany moving images. Just turn on the television and shut your eyes to experience this. Movie soundtracks enhance the viewers experience, TV commercials use music to communicate brand values and attract the attention of the viewer, and TV programs feature a wide range of music throughout. Much of this music is not composed specifically for this purpose but has another life in the commercial market place. The owners of these recordings and compositions are making great efforts to secure a place for their music in these media and employ expert intermediaries to ‘place’ music in films and TV. Some collections are organised into B2B digital libraries specifically for this purpose, which is known as music synchronisation. Naturally, the collections are organised by traditional metadata such as Artist, Title, Album and Genre. However as users don’t always know exactly what they are looking for, but know what it should sound like, additional facets such as Mood, Tempo and Subject are also employed. In this presentation Charlie Inskip will discuss how creative search is facilitated by these search engines and whether they may be improved
Changing health behaviour of young women from disadvantaged backgrounds: evidence from systematic reviews
No full textObservational evidence suggests that improving the diets of women of child-bearing age from disadvantaged backgrounds might be an important component of public health strategies aimed at reducing the burden of chronic disease in their offspring. The development of an intervention to improve the nutrition of young women needs to be informed by a systematic collation of evidence. Such a systematic collation of evidence from systematic reviews of interventions directed at changing health behaviours including diet, breast-feeding, physical activity and smoking has been conducted. Of 1847 potentially-relevant abstracts, fourteen systematic reviews met inclusion criteria. Four aspects of intervention design were identified that were effective at changing one or more of the health behaviours considered in the present review: the use of an educational component; provision of continued support after the initial intervention; family involvement; social support from peers or lay health workers. The findings of the present review suggest that interventions to change the health behaviour of women of child-bearing age from disadvantaged backgrounds will require an educational approach and should provide continued support after the initial intervention. Family involvement and social support from peers may also be important features of interventions that aim to improve diet.<br/
Maternal vitamin D status during pregnancy and bone mineral content in offspring
No full textWe were intrigued by the results from the Avon Longitudinal Study of Parents and Children (ALSPAC) reporting no association between maternal 25-hydroxyvitamin D (25[OH]D) concentration in pregnancy and offspring bone mass (June 22, p 2176).1 Interestingly, these results contradict findings (which apparently still stand) from the same group (ALSPAC), in which maternal gestational exposure to ultaviolet B light was positively related to offspring bone mass at 9·9 years; this led the investigators to suggest that gestational vitamin D exposure exerts a direct effect on offspring bone development.2 That result was consistent with our findings from Princess Anne Hospital, Southampton, UK, in which maternal gestational serum 25(OH)D positively associated with offspring bone mass at 9 years, even after adjustment for child's age at dual-energy x-ray absorptiometry.3 In their latest ALSPAC analysis,1 adjustment for age removed the relation the investigators identified earlier, due to substantial colinearity between maternal gestational ultaviolet B exposure and child's age at dual-energy x-ray absorptiometry. The authors infer that their original findings2 are not sustained and that the newer results1 provide evidence that maternal vitamin D is not associated with offspring bone mass. Crucially, regression analysis cannot distinguish what is truly cause or confounder; our conclusion would be that substantial uncertainty remains, with these data adding to the growing body of observational evidence. Irrespective of how this intra-cohort inconsistency is interpreted, further evidence is needed from well-conducted systematic reviews4 and randomised trials.5 Definitive evidence-based policy in this important clinical area must await such information
Fetal liver blood flow distribution: role in human developmental strategy to prioritize fat deposition versus brain development
No full textAmong primates, human neonates have the largest brains but also the highest proportion of body fat. If placental nutrient supply is limited, the fetus faces a dilemma: should resources be allocated to brain growth, or to fat deposition for use as a potential postnatal energy reserve? We hypothesised that resolving this dilemma operates at the level of umbilical blood distribution entering the fetal liver. In 381 uncomplicated pregnancies in third trimester, we measured blood flow perfusing the fetal liver, or bypassing it via the ductus venosus to supply the brain and heart using ultrasound techniques. Across the range of fetal growth and independent of the mother's adiposity and parity, greater liver blood flow was associated with greater offspring fat mass measured by dual-energy X-ray absorptiometry, both in the infant at birth (r = 0.43, P<0.001) and at age 4 years (r = 0.16, P = 0.02). In contrast, smaller placentas less able to meet fetal demand for essential nutrients were associated with a brain-sparing flow pattern (r = 0.17, p = 0.02). This flow pattern was also associated with a higher degree of shunting through ductus venosus (P = 0.04). We propose that humans evolved a developmental strategy to prioritize nutrient allocation for prenatal fat deposition when the supply of conditionally essential nutrients requiring hepatic inter-conversion is limited, switching resource allocation to favour the brain if the supply of essential nutrients is limited. Facilitated placental transfer mechanisms for glucose and other nutrients evolved in environments less affluent than those now prevalent in developed populations, and we propose that in circumstances of maternal adiposity and nutrient excess these mechanisms now also lead to prenatal fat deposition. Prenatal developmental influences play important roles in the human propensity to deposit fa
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