1,334 research outputs found
Whole body interaction
In this workshop we explore the notation of whole body interaction. We bring together different disciplines to create a new research direction for study of this emerging form of interaction
Quality of life of patients with kidney failure in sub-Saharan Africa: protocol for a systematic review of quantitative studies
Introduction: The burden of chronic kidney disease (CKD) is rising in sub-Saharan Africa. Access to kidney replacement therapy (KRT) remains limited and modelling suggests a significant hidden burden of kidney failure managed without KRT. Kidney failure is contributing to serious health-related suffering (SHS) at a global level. Despite this, access to palliative care remains extremely disparate. There is an urgent need for greater palliative care provision for patients with kidney failure in sub-Saharan Africa. To inform this, it is important to understand their current quality of life. This article outlines our review protocol, ensuring transparency of our planned methods and reporting.
Methods and analysis: A comprehensive search will be conducted of MEDLINE (Ovid), EMBASE, CINAHL, African Index Medicus and Africa Journals Online. ProQuest Dissertations & Theses Global will be searched for grey literature. Eligible sources will be quantitative observational studies, conducted in sub-Saharan Africa, and published in English or French. The primary outcome measure will be quality of life of those with kidney failure, measured using a validated quality of life tool. Abstract screening, data extraction and risk of bias assessments will be conducted independently by two reviewers. Meta-analysis will be performed on study subgroups, if appropriate, based on heterogeneity of included studies; otherwise results will be summarised narratively. This protocol is structured according to the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P) guidance.
Ethics and dissemination: Ethical approval is not required because this review will synthesise published data. Findings will be disseminated in a peer-reviewed journal.
PROSPERO registration ID: 27543
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Inosine can increase DNA's susceptibility to photo-oxidation by a Ru(II) complex due to structural change in the minor groove
Key to the development of DNA-targeting phototherapeutic drugs is determining the interplay between the photoactivity of the drug and its binding preference for a target sequence. For the photo- oxidising lambda-[Ru(TAP)2(dppz)]2+ (É
-1) complex bound to either d{T1C2G3G4C5G6C7C8G9A10}2 (G9) or d{TCGGCGCCIA}2 (I9), the X- ray crystal structures shows the dppz intercalated at the terminal T1C2;G9A10 step or T1C2;I9A10 step. Thus substitution of the G9 nucleobase by inosine does not affect intercalation in the solid state although with I9 the dppz is more deeply inserted. In solution it is found that the extent of guanine photo-oxidation, and the rate of back electron transfer, as determined by ps and ns time-resolved infrared and transient visible absorption spectroscopy, is enhanced in I9, despite it containing the less oxidisable inosine. This is attributed to the nature of the binding in the minor groove due to the absence of an NH2 group. Similar behaviour and the same binding site in the crystal.are found for d{TTGGCGCCAA}2 (A9), In solution we propose that intercalation occurs at the C2G3;C8I9 or T2G3;C8A9 steps, respectively, with G3 the likely target for photo-oxidation. This demonstrates how changes in the minor groove (in this case removal of an NH2 group) can facilitate binding of Ru(II)dppz complexes and hence influence any sensitised reactions occurring at these sites. No similar enhancement of photooxidation on binding to I9 is found for the delta enantiomer
The effect of malaria control on <i>Plasmodium falciparum</i> in Africa between 2000 and 2015
Since the year 2000, a concerted campaign against malaria has led to unprecedented levels of intervention coverage across sub-Saharan Africa. Understanding the effect of this control effort is vital to inform future control planning. However, the effect of malaria interventions across the varied epidemiological settings of Africa remains poorly understood owing to the absence of reliable surveillance data and the simplistic approaches underlying current disease estimates. Here we link a large database of malaria field surveys with detailed reconstructions of changing intervention coverage to directly evaluate trends from 2000 to 2015, and quantify the attributable effect of malaria disease control efforts. We found that Plasmodium falciparum infection prevalence in endemic Africa halved and the incidence of clinical disease fell by 40% between 2000 and 2015. We estimate that interventions have averted 663 (542-753 credible interval) million clinical cases since 2000. Insecticide-treated nets, the most widespread intervention, were by far the largest contributor (68% of cases averted). Although still below target levels, current malaria interventions have substantially reduced malaria disease incidence across the continent. Increasing access to these interventions, and maintaining their effectiveness in the face of insecticide and drug resistance, should form a cornerstone of post-2015 control strategies.</p
Retinal microvasculature and cerebral small vessel disease in the Lothian Birth Cohort 1936 and Mild Stroke Study
Abstract Research has suggested that the retinal vasculature may act as a surrogate marker for diseased cerebral vessels. Retinal vascular parameters were measured using Vessel Assessment and Measurement Platform for Images of the Retina (VAMPIRE) software in two cohorts: (i) community-dwelling older subjects of the Lothian Birth Cohort 1936 (nâ=â603); and (ii) patients with recent minor ischaemic stroke of the Mild Stroke Study (nâ=â155). Imaging markers of small vessel disease (SVD) (white matter hyperintensities [WMH] on structural MRI, visual scores and volume; perivascular spaces; lacunes and microbleeds), and vascular risk measures were assessed in both cohorts. We assessed associations between retinal and brain measurements using structural equation modelling and regression analysis. In the Lothian Birth Cohort 1936 arteriolar fractal dimension accounted for 4% of the variance in WMH load. In the Mild Stroke Study lower arteriolar fractal dimension was associated with deep WMH scores (odds ratio [OR] 0.53; 95% CI, 0.32â0.87). No other retinal measure was associated with SVD. Reduced fractal dimension, a measure of vascular complexity, is related to SVD imaging features in older people. The results provide some support for the use of the retinal vasculature in the study of brain microvascular disease
Project 1640 Observations of Brown Dwarf GJ 758 B: Near-infrared Spectrum and Atmospheric Modeling
The nearby Sun-like star GJ 758 hosts a cold substellar companion, GJ 758 B,
at a projected separation of 30 AU, previously detected in
high-contrast multi-band photometric observations. In order to better constrain
the companion's physical characteristics, we acquired the first low-resolution
() near-infrared spectrum of it using the high-contrast
hyperspectral imaging instrument Project 1640 on Palomar Observatory's 5-m Hale
telescope. We obtained simultaneous images in 32 wavelength channels covering
the , , and bands (952-1770 nm), and used data processing
techniques based on principal component analysis to efficiently subtract
chromatic background speckle-noise. GJ 758 B was detected in four epochs during
2013 and 2014. Basic astrometric measurements confirm its apparent northwest
trajectory relative to the primary star, with no clear signs of orbital
curvature. Spectra of SpeX/IRTF observed T dwarfs were compared to the combined
spectrum of GJ 758 B, with minimization suggesting a best fit for
spectral type T7.01.0, but with a shallow minimum over T5-T8. Fitting of
synthetic spectra from the BT-Settl13 model atmospheres gives an effective
temperature K and surface gravity dex (cgs). Our derived best-fit spectral type and effective temperature
from modeling of the low-resolution spectrum suggest a slightly earlier and
hotter companion than previous findings from photometric data, but do not rule
out current results, and confirm GJ 758 B as one of the coolest sub-stellar
companions to a Sun-like star to date
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What do I do now? Intolerance of uncertainty is associated with discrete patterns of anticipatory physiological responding to different contexts
Heightened physiological responses to uncertainty are a common hallmark of anxiety disorders. Many separate studies have examined the relationship between individual differences in intolerance of uncertainty (IU) and physiological responses to uncertainty during different contexts. Despite this there is a scarcity of research examining the extent to which individual differences in IU are related to shared or discrete patterns of anticipatory physiological responding across different contexts. Anticipatory physiological responses to uncertainty were assessed in three different contexts (associative threat learning and extinction, threat uncertainty, decision-making) within the same sample (n = 45). During these tasks, behavioural responses (i.e. reaction times, choices), skin conductance and corrugator supercilli activity were recorded. In addition, self-reported IU and trait anxiety were measured. IU was related to both skin conductance and corrugator supercilii activity for the associative threat learning and extinction context, and decision-making context. However, trait anxiety was related to corrugator supercilii activity during the threat uncertainty context. Ultimately, this research helps us further tease apart the role of IU on different aspects of anticipation (i.e. valence and arousal) across contexts, which will be relevant for future IU-related models of psychopathology
Empowering Wildlife Guardians: An Equitable Digital Stewardship and Reward System for Biodiversity Conservation Using Deep Learning and 3/4G Camera Traps
The biodiversity of our planet is under threat, with approximately one million species expected to become extinct within decades. The reason: negative human actions, which include hunting, overfishing, pollution, and the conversion of land for urbanisation and agricultural purposes. Despite significant investment from charities and governments for activities that benefit nature, global wildlife populations continue to decline. Local wildlife guardians have historically played a critical role in global conservation efforts and have shown their ability to achieve sustainability at various levels. In 2021, COP26 recognised their contributions and pledged USD 1.7 billion per year; however this is a fraction of the global biodiversity budget available (between USD 124 billion and USD 143 billion annually) given they protect 80% of the planets biodiversity. This paper proposes a radical new solution based on âInterspecies Moneyâ, where animals own their own money. Creating a digital twin for each species allows animals to dispense funds to their guardians for the services they provide. For example, a rhinoceros may release a payment to its guardian each time it is detected in a camera trap as long as it remains alive and well. To test the efficacy of this approach, 27 camera traps were deployed over a 400 km22 area in Welgevonden Game Reserve in Limpopo Province in South Africa. The motion-triggered camera traps were operational for ten months and, using deep learning, we managed to capture images of 12 distinct animal species. For each species, a makeshift bank account was set up and credited with GBP 100. Each time an animal was captured in a camera and successfully classified, 1 penny (an arbitrary amountâmechanisms still need to be developed to determine the real value of species) was transferred from the animal account to its associated guardian. The trial demonstrated that it is possible to achieve high animal detection accuracy across the 12 species with a sensitivity of 96.38%, specificity of 99.62%, precision of 87.14%, F1 score of 90.33%, and an accuracy of 99.31%. The successful detections facilitated the transfer of GBP 185.20 between animals and their associated guardians
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