Skin ageing

Cutaneous ageing manifests itself as a progressive reduction in maximum function and reserve capacity of skin tissue. It is not a unique and uniform biological event. Skin comprises three layers: epidermis, dermis and subcutaneous tissue. Collagen atrophy is a major factor in skin ageing. There is a strong correlation between skin collagen loss and estrogen deficiency due to the menopause. Skin ageing, especially in the face, is associated with a progressive increase in extensibility and a reduction in elasticity. With increasing age, the skin also becomes more fragile and susceptible to trauma, leading to more lacerations and bruising. Furthermore, wound healing is impaired in older women. Estrogen use after the menopause increases collagen content, dermal thickness and elasticity, and it decreases the likelihood of senile dry skin. Large-scale clinical trials are necessary to help make informed recommendations regarding postmenopausal estrogen use and its role in the prevention of skin ageing.peer-reviewe

Does intimate partner violence impact on women's initiation and duration of breastfeeding?

Background: Intimate Partner Violence (IPX') is prevalent among recent mothers and negatively impacts their physical and emotional health. Furthermore, the negative influence of IPV on parenting capacity and children's development is well described. However, it is unclear whether there is any relationship between IPV and method of infant feeding. Little is known about how women who are subjected to IPV make decisions about infant feeding or whether living in this context impacts on their experience of breastfeeding. With what is known about the importance of breastfeeding, particularly for vulnerable populations, research is essential to inform clinical practice and to develop appropriate community support strategies. Methods: This paper describes an analysis of data from a pragmatic cluster randomised controlled trial: Improving maternal and child health nurse care for vulnerable mothers (MOVE). The MOVE trial was conducted in the north-western suburbs of Melbourne, Australia from April 2010 - April 2011 and involved 80 maternal and child health centres, 160 nurses and 2621 women who completed a survey. Intimate partner violence was measured using the Composite Abuse Scale. Results: Ninety-six per cent (n=2111) of participating women initiated breastfeeding, with 80% (n=1776) and 74% (n=1537) indicating 'any' breastfeeding at 3 and 6 months respectively. Respondents tended to be older, well-educated with a household income >$70,000 per annum compared to the general population. The characteristics of women from the IPV and non-IPV groups were similar and together were comparable to all women who gave birth in north-west Melbourne. The reported prevalence of IPV in this survey was 6.3% (n-138), which maybe an underestimate. Breastfeeding rates did not significantly differ between IPV and non-IPV groups. Conclusions: Our findings suggest that women who experience IPV are just as likely to breastfeed as the broader population of women. While this analysis provides a snapshot of breastfeeding rates for this group of women, it does not capture women's experience of IPV as it relates to feeding a baby. In order to better identify infant feeding in the context of IPV, qualitative research is also necessary to investigate in a way that fully engages victims/survivors, giving them the opportunity to give voice to their experiences

An MPEG-7 scheme for semantic content modelling and filtering of digital video

Abstract Part 5 of the MPEG-7 standard specifies Multimedia Description Schemes (MDS); that is, the format multimedia content models should conform to in order to ensure interoperability across multiple platforms and applications. However, the standard does not specify how the content or the associated model may be filtered. This paper proposes an MPEG-7 scheme which can be deployed for digital video content modelling and filtering. The proposed scheme, COSMOS-7, produces rich and multi-faceted semantic content models and supports a content-based filtering approach that only analyses content relating directly to the preferred content requirements of the user. We present details of the scheme, front-end systems used for content modelling and filtering and experiences with a number of users

Brain symmetry index in healthy and stroke patients for assessment and prognosis

Quantitative neurophysiological signal parameters are of value in predicting motor recovery after stroke.Thenovel role of EEG-derived brain symmetry index formotor function prognostication in the subacute phase after stroke is explored. Ten male stroke patients and ten matched healthy controls were recruited. Motor function was first assessed clinically using the MRC score, its derivativeMotricity Index, and the Fugl–Meyer assessment score. EEG was subsequently recorded firstwith subjects at rest and then during hand graspingmotions, triggered by visual cues. Brain symmetry index (BSI) was used to identify the differences in EEG-quantified interhemispheric cortical power asymmetry observable in healthy versus cortical and subcortical stroke patients. Subsequently, any correlation between BSI and motor function was explored. BSI was found to be significantly higher in stroke subjects compared to healthy controls ( = 0.023). The difference in BSI was more pronounced in the cortical stroke subgroup ( = 0.016). BSI showed only a mild general decrease on repeated monthly recording. Notably, a statistically significant correlation was observed between early BSI and Fugl–Meyer score later in recovery ( < 0.050). Brain symmetry index is increased in the subacute poststroke phase and correlates with motor function 1-2 months after stroke.peer-reviewe

Galaxy And Mass Assembly (GAMA) : refining the local galaxy merger rate using morphological information

KRVS acknowledges the Science and Technology Facilities Council (STFC) for providing funding for this project, as well as the Government of Catalonia for a research travel grant (ref. 2010 BE-00268) to begin this project at the University of Nottingham. PN acknowledges the support of the Royal Society through the award of a University Research Fellowship and the European Research Council, through receipt of a Starting Grant (DEGAS-259586).We use the Galaxy And Mass Assembly (GAMA) survey to measure the local Universe mass-dependent merger fraction and merger rate using galaxy pairs and the CAS (concentration, asymmetry, and smoothness) structural method, which identifies highly asymmetric merger candidate galaxies. Our goals are to determine which types of mergers produce highly asymmetrical galaxies and to provide a new measurement of the local galaxy major merger rate. We examine galaxy pairs at stellar mass limits down to M* = 108 M⊙ with mass ratios of 4:1) the lower mass companion becomes highly asymmetric, whereas the larger galaxy is much less affected. The fraction of highly asymmetric paired galaxies which have a major merger companion is highest for the most massive galaxies and drops progressively with decreasing mass. We calculate that the mass-dependent major merger fraction is fairly constant at ∼1.3–2 per cent within 109.5 < M* < 1011.5 M⊙, and increases to ∼4 per cent at lower masses. When the observability time-scales are taken into consideration, the major merger rate is found to approximately triple over the mass range we consider. The total comoving volume major merger rate over the range 108.0 < M* < 1011.5 M⊙ is (1.2 ± 0.5) × 10−3 h370 Mpc−3 Gyr−1.Publisher PDFPeer reviewe

Systemic inflammation in COPD is not influenced by pulmonary rehabilitation

Purpose: Pulmonary rehabilitation is known to lead to improvements in exercise tolerance, health-related quality of life and help reduce symptoms. Exercise, one of the largest components of such an intervention, although of great benefit, can increase the inflammatory response related to chronic obstructive pulmonary disease, depending on intensity and duration. Through this study, the effects of a 12week, high-intensity PR programme on COPD inflammatory-related markers were investigated. Materials and methods: This study is a longitudinal, observational type of study. Sixty COPD patients were enrolled, 49 of which completed the programme. A 2-h high-intensity PR programme was delivered, twice weekly for 12 weeks. The following markers were assessed at baseline, 4, 8 and 12 weeks through rehabilitation – C-reactive protein, erythrocyte sedimentation rate, neutrophil, eosinophil counts, complete blood count, six-minute walk test and St. George’s Respiratory Questionnaire. Serum amyloid A levels were assessed at baseline, week 8 and 12 and exhaled NO at baseline and upon completion of the programme. Results: This 12-week PR programme resulted in no changes in the inflammatory markers but resulted in significant improvements in both the 6MW distance and health quality of life. Conclusions: Beneficial effects on functional and HRQoL measures resulted, which, however, appear unrelated to changes in the systemic inflammatory markers.peer-reviewe

Galaxy And Mass Assembly (GAMA) : galaxy close pairs, mergers and the future fate of stellar mass

ASGR acknowledges STFC and SUPA funding that were used to do this work. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO and the participating institutions.We use a highly complete subset of the Galaxy And Mass Assembly II (GAMA-II) redshift sample to fully describe the stellar mass dependence of close pairs and mergers between 10(8) and 10(12)M(circle dot). Using the analytic form of this fit we investigate the total stellar mass accreting on to more massive galaxies across all mass ratios. Depending on how conservatively we select our robust merging systems, the fraction of mass merging on to more massive companions is 2.0-5.6 per cent. Using the GAMA-II data we see no significant evidence for a change in the close pair fraction between redshift z = 0.05 and 0.2. However, we find a systematically higher fraction of galaxies in similar mass close pairs compared to published results over a similar redshift baseline. Using a compendium of data and the function gamma(M) = A(1 + z)(m) to predict the major close pair fraction, we find fitting parameters of A = 0.021 +/- 0.001 and m = 1.53 +/- 0.08, which represents a higher low-redshift normalization and shallower power-law slope than recent literature values. We find that the relative importance of in situ star formation versus galaxy merging is inversely correlated, with star formation dominating the addition of stellar material below M* and merger accretion events dominating beyond M*. We find mergers have a measurable impact on the whole extent of the galaxy stellar mass function (GSMF), manifest as a deepening of the 'dip' in the GSMF over the next similar to Gyr and an increase in M* by as much as 0.01-0.05 dex.Publisher PDFPeer reviewe