David A. Peters

Enhancing Optimal Power Flow Feasibility: A Novel Comparative Study of Approximation Techniques

Sarah Alibhai, David A. Peters, Sajad Fathi Hafshejani, Daya Ram Gaur et autres

This experimental study investigates three approximation methods (quadratic, linear, and logarithmic) of the Optimal Power Flow problem (OPF) in comparison to traditional DC-OPF approximations using benchmark cases from the MATPOWER library. The quality and efficiency of each method is assessed using novel …

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A Velocity Potential-Based Finite State Model for Ground Effect Analysis

Andro Metry, J. V. R. Prasad, David A. Peters

A velocity potential-based finite state model (VPBFSM) has been developed to analyze an isolated rotor in ground effect. The model uses mass source distributions to represent the ground and enforces the non-penetration of flow boundary condition. In previous VPBFSM approaches to impose …

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Finite State Modeling of Ground Effect Using Mass Source Distribution at the Ground Plane

Aandro Metry, David A. Peters, J. V. R. Prasad

Ground effect analytical models in the literature, such as the Pressure Potential Based Finite State Model (PPBFSM) or Velocity Potential Based Finite State Model (VPBFSM) have been developed to study an isolated rotor in full ground effect. These models use the mass …

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The ‘take‐5 theatre brief’: Group mindfulness practice for operating theatre teams

James Schuster‐Bruce, Eleanor Crossley, David A. Peters, Ananth Sathyanath et autres

BACKGROUND: A surgical team works in a high-performance environment and is exposed to stress. Mindfulness practice is evidenced to reduce symptoms of stress, as well as burnout, which is high amongst health workers. The operating theatre is unique, with many job-roles, needs …

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Combined petrosal approach: a systematic review and meta-analysis of surgical complications

Lorenzo Giammattei, Daniele Starnoni, David A. Peters, Mahmoud Messerer et autres

Transpetrosal approaches are known to be associated with a significant risk of complications, including CSF leak, facial palsy, hearing impairment, venous injury, and/or temporal lobe injury. We aimed to evaluate the morbidity of the standard combined petrosal approach (CPA), defined as a …

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Proton beam radiation therapy for vestibular schwannomas-tumor control and hearing preservation rates: a systematic review and meta-analysis

Antonio Santacroce, Mioara Florentina Trandafirescu, Marc Levivier, David A. Peters et autres

Abstract Objective Proton beam therapy is considered, by some authors, as having the advantage of delivering dose distributions more conformal to target compared with stereotactic radiosurgery (SRS). Here, we performed a systematic review and meta-analysis of proton beam for VSs, evaluating tumor …

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A short session of maternal hyperoxygenation ameliorates the cerebral oxygenation difference between fetuses with and without congenital heart defects

Mette Høj Lauridsen, Niels Uldbjerg, David A. Peters, Steffen Ringgaard et autres

To assess if a 10 min session of maternal hyperoxygenation increases cerebral tissue oxygenation as measured by magnetic resonance imaging (MRI) T2* in fetuses with and without congenital heart defects (CHDs). At mean gestational ages of 32 (early) and 37 (late), we …

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Floquet Instability in Periodically Reversing Flows

J. A. Welsh, David A. Peters

Current 3-D finite-state wake models are incapable of simulating a maneuver in which the sign of the free-stream velocity changes direction and the rotor enters its own wake - as might occur in the case of a helicopter which ascends and then …

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Confined placental mosaicism: placental size and function evaluated on magnetic resonance imaging

I. R. Linderoth, Ditte N. Hansen, Jens Brøndum Frøkjær, David A. Peters et autres

OBJECTIVES: Evidence regarding placental function in pregnancies complicated by confined placental mosaicism (CPM) is conflicting. We aimed to compare placental function between CPM and non-CPM pregnancies prenatally and at birth. A secondary objective was to evaluate the relationship between placental function and …

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Abstract WP9: Number Needed To Treat With Intravenous Tenecteplase To Reduce The Need For Mechanical Thrombectomy In Large Vessel Occlusion Acute Ischemic Stroke Patients: Real-world Experience Data.

Steven Platko, Fatima Bensabeur, David A. Peters, Noor Darwich et autres

Objective: We sought to describe short term outcomes in patients with large vessel occlusion acute ischemic stroke (LVOAIS) who were treated with intravenous tenecteplase (TNK) as compared to alteplase, focusing on reduction in the need for mechanical thrombectomy (MT). Background: In LVOAIS, …

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Radiological Evolution of Fat Graft Used for Optic Neuropexy During Surgery for Parasellar Meningiomas

Simon Diaz, Daniele Starnoni, Constantin Tuleasca, Vincent Dunet et autres

BACKGROUND: Stereotactic radiosurgery (SRS) is an effective adjuvant therapy for residual tumor after subtotal resection of parasellar meningiomas. Fat graft placement between the optic nerve/chiasm and residual tumor (optic neuropexy [OPN]) allows for safe SRS therapy. OBJECTIVE: To evaluate the radiological temporal …

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Placental volume, thickness and transverse relaxation time (T2*) estimated by magnetic resonance imaging in relation to small for gestational age at birth

N.D. Mydtskov, Marianne Sinding, K.K. Aarøe, L.V. Thaarup et autres

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