Publications by authors named "Robert Chambers"

Article Synopsis
  • * Biodegradable bioplastic membranes, made from a mix of thermoplastic polyurethane (TPU) and polylactic acid (PLA), offer strength and effectiveness while decomposing under specific conditions.
  • * These electrospun membranes provide good air filtration and significantly reduce reliance on petroleum-based materials while addressing plastic waste through biodegradability.
View Article and Find Full Text PDF

The fabrication of pressure-sensitive adhesives (PSA) using liquid crystal elastomers (LCE) that are tolerant to substrate roughness is explored in this work. Traditional soft adhesives are designed by maintaining a balance between their cohesive strength and compliance. However, rough surfaces can significantly affect the adhesion strength of PSAs.

View Article and Find Full Text PDF
Article Synopsis
  • Metamaterial structural adhesives (MSAs) offer enhanced adhesion properties, with features like asymmetric and programmable adhesion, but their performance with thick backing structures is still not well understood.
  • In experiments, MSAs with a thick film (2 mm) showed double the effective adhesion energy compared to solid samples without losing shear strength, aligning with theoretical expectations.
  • However, thinner films (0.5 mm) exhibited significantly higher adhesion and shear strength than predicted, and by adjusting the beam tilt angle, researchers achieved notable variations in adhesion strength and energy, suggesting applications for advanced robotics and wearable technology.
View Article and Find Full Text PDF

Background: COVID-19 placed immense strain on healthcare systems, necessitating innovative responses to the surge of critically ill patients, particularly those requiring mechanical ventilation. In this report, we detail the establishment of a dedicated critical care prone positioning team at University Hospital Southampton in response to escalating demand for prone positioning during the initial wave of the pandemic.

Methods: The formation of a prone positioning team involved meticulous planning and collaboration across disciplines to ensure safe and efficient manoeuvrers.

View Article and Find Full Text PDF

Introduction: Outbreaks of SARS-CoV-2 onboard maritime platforms spread rapidly and have high attack rates. The aim of the COVID-19 Risk, Attitudes and Behaviour (CRAB) study was to investigate the knowledge, attitudes, and practises in the Royal Navy in relation to COVID-19 prevention.

Methods: The CRAB study was a cross-sectional survey, using a census sampling method, conducted in May and June 2021.

View Article and Find Full Text PDF

Introduction: Through routine respiratory samples surveillance among COVID-19 patients in the intensive care, three patients with aspergillus were identified in a newly opened general intensive care unit during the second wave of the pandemic.

Methodology: As no previous cases of aspergillus had occurred since the unit had opened. An urgent multidisciplinary outbreak meeting was held.

View Article and Find Full Text PDF

Collar-mounted canine activity monitors can use accelerometer data to estimate dog activity levels, step counts, and distance traveled. With recent advances in machine learning and embedded computing, much more nuanced and accurate behavior classification has become possible, giving these affordable consumer devices the potential to improve the efficiency and effectiveness of pet healthcare. Here, we describe a novel deep learning algorithm that classifies dog behavior at sub-second resolution using commercial pet activity monitors.

View Article and Find Full Text PDF

Critically ill patients admitted to hospital following SARS-CoV-2 infection often experience hypoxic respiratory failure and a proportion require invasive mechanical ventilation to maintain adequate oxygenation. The combination of prone positioning and non-invasive ventilation in conscious patients may have a role in improving oxygenation. The purpose of this study was to assess the effect of prone positioning in spontaneously ventilating patients receiving non-invasive ventilation admitted to the intensive care.

View Article and Find Full Text PDF

We present this case of a young woman with SARS-CoV-2 viral infection resulting in coronavirus 2019 (COVID-19) lung disease complicated by a complex hydropneumothorax, recurrent pneumothorax, and pneumatoceles. A 33-year-old woman presented to the hospital with a one-week history of cough, shortness of breath, and myalgia, with no other significant past medical history. She tested positive for COVID-19 and subsequently, her respiratory function rapidly deteriorated, necessitating endotracheal intubation and mechanical ventilation.

View Article and Find Full Text PDF

In this paper, we present and benchmark FilterNet, a flexible deep learning architecture for time series classification tasks, such as activity recognition via multichannel sensor data. It adapts popular convolutional neural network (CNN) and long short-term memory (LSTM) motifs which have excelled in activity recognition benchmarks, implementing them in a many-to-many architecture to markedly improve frame-by-frame accuracy, event segmentation accuracy, model size, and computational efficiency. We propose several model variants, evaluate them alongside other published models using the Opportunity benchmark dataset, demonstrate the effect of model ensembling and of altering key parameters, and quantify the quality of the models' segmentation of discrete events.

View Article and Find Full Text PDF

A wide range of mental illnesses show high rates of addiction comorbidities regardless of their genetic, neurodevelopmental, and/or adverse-environmental etiologies. Understanding how the spectrum of mental illnesses produce addiction vulnerability will be key to discovering more effective preventions and integrated treatments for adults with addiction and dual diagnosis comorbidities. A population of 131 rats containing a spectrum of etiological mental illness models and degrees of severity was experimentally generated by crossing neonatal ventral hippocampal lesions (NVHL; n = 68) or controls (SHAM-operated; n = 63) with adolescent rearing in environmentally/socially enriched (ENR; n = 66) or impoverished (IMP; n = 65) conditions.

View Article and Find Full Text PDF

An innovative open-label, crossover clinical study was used to investigate the excretion balance, pharmacokinetics, and metabolism of nemiralisib-an inhaled phosphoinositide 3-kinase delta inhibitor being developed for respiratory diseases. Six healthy men received a single intravenous microtracer of 10 g [C]nemiralisib with a concomitant inhaled nonradiolabeled 1000 g dose followed by an oral 800 g dose of [C]nemiralisib 14 days later. Complementary methods including accelerator mass spectrometry allowed characterization of a range of parameters including oral absorption (F), proportion of nemiralisib escaping gut wall metabolism (F), hepatic extraction (E), fraction of dose absorbed from inhaled dose (F), and renal clearance.

View Article and Find Full Text PDF

The threats posed by neonicotinoid insecticides to bee populations have been the focus of considerable research. Previous work has shed new light on the effects of neonicotinoids on bees by uncovering pathways through which neonicotinoids affect bee population dynamics and the potential interactions they have with exogenous stressors. Yet, little is known about whether these effects translate in a field-relevant setting to substantial losses in honey yields for commercial beekeepers.

View Article and Find Full Text PDF

Objectives: To describe our preliminary experience in establishing an MRI suite capable to deliver targeted prostate biopsy and cryoablation.

Methods: This article includes a description of the necessary infrastructure alterations, scanning sequence suggestions, anaesthetic advice, and practical procedural considerations. We aim to examine the anticipated issues most UK centres would encounter and offer our experience in overcoming them.

View Article and Find Full Text PDF

A pressing question for climate change adaptation is whether ongoing transformations of the agricultural sector affect its ability to cope with climatic variations. We examine this question in the United States, where major increases in productivity have fueled most of agricultural production growth over the past half-century. To quantify the evolving climate sensitivity of the sector and identify its sources, we combine state-level measures of agricultural productivity with detailed climate data for 1960-2004.

View Article and Find Full Text PDF

Background And Objectives: Prescription Drug Monitoring Programs (PDMPs) can serve as screening tools and support the clinical decision-making process in patients receiving opioids. The objective of the study was to utilize 2014 INSPECT (Indiana's PDMP) data to identify factors that increase patients' likelihood to engage in opioid-related risk behaviors.

Methods: Based on a literature review, four risk behaviors were identified: Receiving >90 morphine milligram equivalents (MME), having >4 opioid prescribers, obtaining opioids from >4 pharmacies, and concurrent use of opioids and benzodiazepines.

View Article and Find Full Text PDF

The effects of a high carbon dioxide on cerebral perfusion and intracranial pressure are well known. We report the case of a man who presented after with a severe traumatic brain injury including intracranial and extradural haemorrhage. Neuroprotective ventilation was impossible without supramaximal tidal volumes due to a combination of chest trauma and severe bronchospasm.

View Article and Find Full Text PDF

The sensitivity of agricultural productivity to climate has not been sufficiently quantified. The total factor productivity (TFP) of the US agricultural economy has grown continuously for over half a century, with most of the growth typically attributed to technical change. Many studies have examined the effects of local climate on partial productivity measures such as crop yields and economic returns, but these measures cannot account for national-level impacts.

View Article and Find Full Text PDF

Background: The United Kingdom population is ageing. Half of patients requiring an emergency laparotomy are aged over 70, 20 % die within 30 days, and less than half receive good care. Frailty and delay in management are associated with poor surgical outcomes.

View Article and Find Full Text PDF

Objectives: In a cross-sectional study of human immunodeficiency virus (HIV)-infected adults, the authors showed lower distortion product otoacoustic emissions (DPOAEs) in HIV+ individuals compared with controls as well as findings consistent with a central auditory processing deficit in HIV+ adults on antiretroviral therapy. The authors hypothesized that HIV+ children would also have a higher prevalence of abnormal central and peripheral hearing test results compared with HIV- controls.

Design: Pure-tone thresholds, DPOAEs, and tympanometry were performed on 244 subjects (131 HIV+ and 113 HIV- subjects).

View Article and Find Full Text PDF

Objectives: Abnormal hearing tests have been noted in human immunodeficiency virus (HIV)-infected patients in several studies, but the nature of the hearing deficit has not been clearly defined. The authors performed a cross-sectional study of both HIV+ and HIV- individuals in Tanzania by using an audiological test battery. The authors hypothesized that HIV+ adults would have a higher prevalence of abnormal central and peripheral hearing test results compared with HIV- controls.

View Article and Find Full Text PDF

We present an experimental study on the effect of polymer PVP on EOF mobility of microchannels wet etched into optical white soda lime glass, also known as Crown glass. We performed experiments to evaluate the effect of PVP concentration and pH on EOF mobility. We used on-chip capillary zone electrophoresis and a neutral fluorescent dye as a passive marker to quantify the electroosmotic flow.

View Article and Find Full Text PDF

In order to evaluate the effectiveness of aldehyde dehydrogenase (ALDH) from Saccharomyces cerevisiae as a catalyst for the conversion of acetaldehyde into its physiologically and biologically less toxic acetate, the kinetics over broad concentrations were studied to develop a suitable kinetic rate expression. Even with literature accounts of the binding complexations, the yeast ALDH currently lacks a quantitative kinetic rate expression accounting for simultaneous inhibition parameters under higher acetaldehyde concentrations. Both substrate acetaldehyde and product NADH were observed as individual sources of inhibition with the combined effect of a ternary complex of acetaldehyde and the coenzyme leading to experimental rates as little as an eighth of the expected activity.

View Article and Find Full Text PDF

Background: Cytoreductive surgery (CRS) combined with heated intraperitoneal chemotherapy (HIPEC) is an established treatment for patients with pseudomyxoma peritonei. There is now increasing evidence for the use of CRS and HIPEC in the treatment of other peritoneal surface malignancies. There is currently no consensus on the perioperative management of this patient group.

View Article and Find Full Text PDF

We present an experimental study of the effect of pH, ionic strength, and concentrations of the electroosmotic flow (EOF)-suppressing polymer polyvinylpyrrolidone (PVP) on the electrophoretic mobilities of commonly used fluorescent dyes (fluorescein, Rhodamine 6G, and Alexa Fluor 488). We performed on-chip capillary zone electrophoresis experiments to directly quantify the effective electrophoretic mobility. We use Rhodamine B as a fluorescent neutral marker (to quantify EOF) and CCD detection.

View Article and Find Full Text PDF