Search results for: David Gray

Items from 1 to 20 out of 110 results

article

Risk Factors for Severe Outcomes in Patients With Systemic Vasculitis and COVID‐19: A Binational, Registry‐Based Cohort Study

Matthew A. Rutherford, Jennifer Scott, Maira Karabayas, Marilina Antonelou, more

Arthritis & Rheumatology > 73 > 9 > 1713 - 1719

Objective COVID‐19 is a novel infectious disease with a broad spectrum of clinical severity. Patients with systemic vasculitis have an increased risk of serious infections and may be at risk of severe outcomes following COVID‐19. We undertook this study to establish the risk factors for severe COVID‐19 outcomes in these patients, including the impact of immunosuppressive therapies. Methods A multicenter...

article

A literature review of the economics of COVID‐19

Abel Brodeur, David Gray, Anik Islam, Suraiya Bhuiyan

Journal of Economic Surveys > 35 > 4 > 1007 - 1044

The goal of this piece is to survey the developing and rapidly growing literature on the economic consequences of COVID‐19 and the governmental responses, and to synthetize the insights emerging from a very large number of studies. This survey: (i) provides an overview of the data sets and the techniques employed to measure social distancing and COVID‐19 cases and deaths; (ii) reviews the literature...

article

Elective surgery cancellations due to the COVID‐19 pandemic: global predictive modelling to inform surgical recovery plans

COVIDSurg Collaborative, Dmitri Nepogodiev, Omar M Omar, James C Glasbey, more

British Journal of Surgery > 107 > 11 > 1440 - 1449

Background The COVID‐19 pandemic has disrupted routine hospital services globally. This study estimated the total number of adult elective operations that would be cancelled worldwide during the 12 weeks of peak disruption due to COVID‐19. Methods A global expert response study was conducted to elicit projections for the proportion of elective surgery that would be cancelled or postponed during...

article

Labour market effects of urban riots: An experimental assessment

Emmanuel Duguet, David Gray, Yannick L'Horty, Loïc Parquet, more

Papers in Regional Science > 99 > 3 > 787 - 806

We measure the effects of urban riots on the labour market prospects of workers in the case of the French riots of 2007. The town of Villiers‐le‐Bel is our treatment unit while two other towns serve as control groups, Sarcelles and Enghien‐les‐Bains. Using the technique of correspondence testing, we are able to discern disparities in call‐back rates for fictitious candidates who respond to actual...

article

Activating an optogenetically engineered retina with a wearable headset in patients with retinitis pigmentosa

Joël Chavas, Nacer Boussahoul, Damien Duport, Charlie Galle, more

Acta Ophthalmologica > 97 > S263 > n/a - n/a

Purpose Optogenetics allows the expression of channelrhodopsins like ChrimsonR (ChR) in the retina of blind patients in order to confer light sensitivity to retinal ganglion cells (RGCs). However, ChR has a low sensitivity to light and is unlikely to be activated by ambient light. To activate ChR and to obtain a functional response from the RGCs, we developed and tested a wearable headset that delivers...

article

Burkholderia pseudomallei d‐alanine‐d‐alanine ligase; detailed characterisation and assessment of a potential antibiotic drug target

Laura Díaz‐Sáez, Leah S. Torrie, Stuart P. McElroy, David Gray, more

The FEBS Journal > 286 > 22 > 4509 - 4524

Burkholderia pseudomallei is a serious, difficult to treat Gram‐negative pathogen and an increase in the occurrence of drug‐resistant strains has been detected. We have directed efforts to identify and to evaluate potential drug targets relevant to treatment of infection by B. pseudomallei. We have selected and characterised the essential enzyme d‐alanine‐d‐alanine ligase (BpDdl), required for the...

article

Can shared value and entrepreneurship contribute to SME development within rural locations?

Kevin Blanchard, David Gray

Strategic Change > 28 > 2 > 147 - 155

The study tests the view that shared value indices are or similar to that of entrepreneurial awareness, both in their tacit and strategic decision‐making abilities. A survey of 23 rural and remote rural businesses was carried in order to examine how and why they made specific judgments within their daily and longer‐term business decision making. The literature indicates that both concepts do have...

article

Prospective observational cohort study on grading the severity of postoperative complications in global surgery research

International Surgical Outcomes Study (ISOS) group, T. E. F. Abbott, K. E. Greaves, A. Patel, more

British Journal of Surgery > 106 > 2 > e73 - e80

Background The Clavien–Dindo classification is perhaps the most widely used approach for reporting postoperative complications in clinical trials. This system classifies complication severity by the treatment provided. However, it is unclear whether the Clavien–Dindo system can be used internationally in studies across differing healthcare systems in high‐ (HICs) and low‐ and middle‐income countries...

article

Correspondence from specialist surgical outpatient clinics to general practitioners

Darren Ow, David Gray, Nathan Lawrentschuk, Damien M. Bolton, more

ANZ Journal of Surgery > 88 > 9 > 818 - 819

article

Enhancing the recovery of oilseed rape seed oil bodies (oleosomes) using bicarbonate-based soaking and grinding media

Simone De Chirico, Vincenzo di Bari, Tim Foster, David Gray

Food Chemistry > 2018 > 241 > C > 419-426

An aqueous process for the recovery of oil bodies from rapeseed using sodium bicarbonate-based soaking and grinding media (pH 9.5) was investigated. The effect of the ratio between seed and mass of media during grinding and molarity of the medium used on oil body integrity, purity and storage stability have been studied. The grinding of seeds in solution at a ratio of 1:7 (w/w) significantly improved...

article

The surgical safety checklist and patient outcomes after surgery: a prospective observational cohort study, systematic review and meta-analysis

T.E.F. Abbott, T. Ahmad, M.K. Phull, A.J. Fowler, more

British Journal of Anaesthesia > 2018 > 120 > 1 > 146-155

The surgical safety checklist is widely used to improve the quality of perioperative care. However, clinicians continue to debate the clinical effectiveness of this tool.Prospective analysis of data from the International Surgical Outcomes Study (ISOS), an international observational study of elective in-patient surgery, accompanied by a systematic review and meta-analysis of published literature...

article

Seasonal variation in the nutrient profile of Arthrospira fusiformis biomass harvested from an Ethiopian soda lake, Lake Chitu

Hirut Assaye, Amha Belay, Gulelat Desse, David Gray

Journal of Applied Phycology > 2018 > 30 > 3 > 1597-1606

The extent of seasonal variation in the nutrient profile of Arthrospira biomass harvested from Lake Chitu was investigated to evaluate the variability of the quality of the product over a period of a year. Protein content varied from 47.9 to 55.7% for wet season biomass samples and from 39.2 to 40.8% for dry season samples. Dry season samples were characterized by relatively higher carbohydrate values...

article

Metamorphic response and crustal architecture in a classic collisional orogen: The Damara Belt, Namibia

Ben Goscombe, David A. Foster, David Gray, Ben Wade

Gondwana Research > 2017 > 52 > C > 80-124

The Damara Belt is a well-exposed mid-crustal section through a collisional orogen of Cambrian age that closed the Khomas Ocean basin between passive margins on the Congo and Kalahari Cratons. Collision resulted in a bi-vergent orogen with a distinct paired metamorphic pattern of foreland-vergent high-P/low-T orogenic margins and a broad high-grade, low-P/high-T orogen core. Spatial and temporal patterns...

article

Hematopoietic Stem Cell Gene Therapy: Progress and Lessons Learned

Richard A. Morgan, David Gray, Anastasia Lomova, Donald B. Kohn

Cell Stem Cell > 2017 > 21 > 5 > 574-590

The use of allogeneic hematopoietic stem cells (HSCs) to treat genetic blood cell diseases has become a clinical standard but is limited by the availability of suitable matched donors and potential immunologic complications. Gene therapy using autologous HSCs should avoid these limitations and thus may be safer. Progressive improvements in techniques for genetic correction of HSCs, by either vector...

article

Deformation correlations, stress field switches and evolution of an orogenic intersection: The Pan-African Kaoko-Damara orogenic junction, Namibia

Ben Goscombe, David A. Foster, David Gray, Ben Wade, more

Geoscience Frontiers > 2017 > 8 > 6 > 1187-1232

Age calibrated deformation histories established by detailed mapping and dating of key magmatic time markers are correlated across all tectono-metamorphic provinces in the Damara Orogenic System. Correlations across structural belts result in an internally consistent deformation framework with evidence of stress field rotations with similar timing, and switches between different deformation events...

chapter

Elliptically polarized high-order harmonics generated in aligned CO₂ molecules

Emmanouil Skantzakis, Stefanos Chatziathanasiou, Paolo A. Carpeggiani, Giuseppe Sansone, more

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) > 1

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Ultrashort extreme ultraviolet (EUV) laser pulses with a controllable polarization state are highly desirable for time-resolved studies and applications involving chirality, circular dichroism, spin dynamics and magnetism in the gas phase or condensed matter. A convenient method to generate such radiation is higher-order harmonic generation (HHG) as applied in numerous laboratories worldwide. Unless...

article

Medical students' perceptions of bedside teaching

David Gray, Octavian Cozar, Janet Lefroy

The Clinical Teacher > 14 > 3 > 205 - 210

Background Bedside teaching is recognised as a valuable tool in medical education by both students and faculty members. Bedside teaching is frequently delivered by consultants; however, junior doctors are increasingly engaging in this form of clinical teaching, and their value in this respect is becoming more widely recognised. The aim of this study was to supplement work completed by previous authors...

article

Experimental investigation of changes in petrophysical properties during CO2 injection into dolomite-rich rocks

Mohamed Khather, Ali Saeedi, Reza Rezaee, Ryan R.P. Noble, more

International Journal of Greenhouse Gas Control > 2017 > 59 > C > 74-90

Carbon dioxide may be injected into an underground geological structure for mere geo-sequestration purposes or as a means of enhanced hydrocarbon recovery. During such an operation, CO₂ is expected to dissolve in the in-situ fluids (primarily consisting of brine) generating a reactive in-situ solute (i.e. carbonated brine). Subsequently, a series of consecutive chemical reactions may occur between...

article

Detection of zinc deposits using terrestrial ferromanganese crusts

Samuel C. Spinks, Yulia Uvarova, Robert Thorne, Ravinder Anand, more

Ore Geology Reviews > 2017 > 80 > C > 484-503

Ferromanganese crusts, coatings of iron oxide and manganese (oxyhydr)oxide minerals, occur in various forms on a broad range of surface materials in the subaerial environment. Manganese (oxyhydr)oxide minerals in particular, have very high adsorption capacities for heavy metals and trace elements. Thus in the scenario whereby metals from ore deposits are liberated and mobilized to the surface and...

chapter

S² measurement of higher order mode content in low loss hypocycloid Kagomé hollow core photonic crystal fiber

Thomas D. Bradley, Natalie V. Wheeler, Gregory T. Jasion, David Gray, more

2016 Conference on Lasers and Electro-Optics (CLEO) > 1 - 2

2016 Conference on Lasers and Electro-Optics (CLEO)

We present the first detailed investigation of modal properties in hypocycloid Kagomé fibers; even with an optimized input launch, higher order modes propagate over long fiber lengths, indicative that these modes have low attenuation.

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INFONA - science communication portal

Search results for: David Gray

Risk Factors for Severe Outcomes in Patients With Systemic Vasculitis and COVID‐19: A Binational, Registry‐Based Cohort Study

A literature review of the economics of COVID‐19

Elective surgery cancellations due to the COVID‐19 pandemic: global predictive modelling to inform surgical recovery plans

Labour market effects of urban riots: An experimental assessment

Activating an optogenetically engineered retina with a wearable headset in patients with retinitis pigmentosa

Burkholderia pseudomallei d‐alanine‐d‐alanine ligase; detailed characterisation and assessment of a potential antibiotic drug target

Can shared value and entrepreneurship contribute to SME development within rural locations?

Prospective observational cohort study on grading the severity of postoperative complications in global surgery research

Correspondence from specialist surgical outpatient clinics to general practitioners

Enhancing the recovery of oilseed rape seed oil bodies (oleosomes) using bicarbonate-based soaking and grinding media

The surgical safety checklist and patient outcomes after surgery: a prospective observational cohort study, systematic review and meta-analysis

Seasonal variation in the nutrient profile of Arthrospira fusiformis biomass harvested from an Ethiopian soda lake, Lake Chitu

Metamorphic response and crustal architecture in a classic collisional orogen: The Damara Belt, Namibia

Hematopoietic Stem Cell Gene Therapy: Progress and Lessons Learned

Deformation correlations, stress field switches and evolution of an orogenic intersection: The Pan-African Kaoko-Damara orogenic junction, Namibia

Elliptically polarized high-order harmonics generated in aligned CO₂ molecules

Medical students' perceptions of bedside teaching

Experimental investigation of changes in petrophysical properties during CO2 injection into dolomite-rich rocks

Detection of zinc deposits using terrestrial ferromanganese crusts

S² measurement of higher order mode content in low loss hypocycloid Kagomé hollow core photonic crystal fiber

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