Search results for: David A. Wood

Items from 1 to 20 out of 221 results

article

Optimising brain age estimation through transfer learning: A suite of pre‐trained foundation models for improved performance and generalisability in a clinical setting

David A. Wood, Matthew Townend, Emily Guilhem, Sina Kafiabadi, more

Human Brain Mapping > 45 > 4 > n/a - n/a

Estimated age from brain MRI data has emerged as a promising biomarker of neurological health. However, the absence of large, diverse, and clinically representative training datasets, along with the complexity of managing heterogeneous MRI data, presents significant barriers to the development of accurate and generalisable models appropriate for clinical use. Here, we present a deep learning framework...

article

Biostratigraphy, microfacies, and reservoir quality of the Oligocene Qom Formation (Kharzan Section, north-west of Ardestan, central Iran)

Asma Aftabi Arani, Ali Reza Ashouri, Jahanbakhsh Daneshian, Abbas Ghaderi, more

Geological Quarterly > 2023 > Vol. 67, No. 3 > art. no. 23

The central Iran Basin is a region with unique environmental characteristics in which the Late Paleogene–Early Neogene benthic foraminifera display distinctive distributions and abundances that can assist in identifying the intervals with the best reservoir potential. Lipidocyclinid and miogypsinid zonal marker taxa in this region can be correlated with those in the SBZ23 region (European Basin),...

article

The Impact of Audit Technology on Audit Task Outcomes: Evidence for Technology‐Based Audit Techniques*

Marc Eulerich, Adi Masli, Jeffrey Pickerd, David A. Wood

Contemporary Accounting Research > 40 > 2 > 981 - 1012

As audit technology becomes more widespread, practice and academia are raising concerns about the costs and benefits of these technologies. We examine how internal auditors use technology‐based audit techniques (TBATs) and how TBATs impact the efficiency and effectiveness of their audits. We use two surveys and interviews of individual auditors and chief audit executives (CAE) to examine their perceptions...

article

The Influence of Management's Internal Audit Experience on Earnings Management*

Matthew Ege, Timothy A. Seidel, Mikhail Sterin, David A. Wood

Contemporary Accounting Research > 39 > 3 > 1834 - 1870

We examine whether firms with managers that have prior internal audit experience are less likely to manage earnings. This examination is important because the internal audit function (IAF) is uniquely positioned to provide experiences that could influence future managerial behavior, including limiting the potential negative repercussions of earnings management. We find that firms with managers that...

article

Outcomes and feasibility of redo‐TAVR after Sapien 3 Ultra TAVR in extremely‐undersized versus nominally‐sized annuli

Gilbert H. L. Tang, Amit Hooda, Syed Zaid, Ming‐Yu Chuang, more

Catheterization and Cardiovascular Interventions > 99 > 6 > 1935 - 1944

Objectives To compare outcomes in Sapien 3 Ultra (S3U) transcatheter aortic valve replacement (TAVR) with extreme annular undersizing (EAU) versus nominal annular sizing (NAS). Background The Edwards S3U valve has reduced paravalvular leak (PVL) in TAVR but outcomes remain unknown in extremely undersized anatomy. Implanting a smaller S3U valve may facilitate future redo‐TAVR but risk compromising...

article

A Framework for Using Robotic Process Automation for Audit Tasks*

Marc Eulerich, Justin Pawlowski, Nathan J. Waddoups, David A. Wood

Contemporary Accounting Research > 39 > 1 > 691 - 720

The ability to develop bots to automate tasks and processes using robotic process automation (RPA) is receiving significant attention in accounting. Auditors often struggle to know what tasks to automate and how to prioritize bot development. Drawing upon socio‐technical systems (STS) theory and using a design science methodology, we develop and validate a three‐step evaluation framework to assist...

article

Complete revascularization in stable multivessel coronary artery disease: A real world analysis from the British Columbia Cardiac Registry

M. Bilal Iqbal, Peter T. Moore, Imad J. Nadra, Simon D. Robinson, more

Catheterization and Cardiovascular Interventions > 99 > 3 > 627 - 638

Background More than half of patients undergoing percutaneous coronary intervention (PCI) have multivessel disease (MVD). The prognostic significance of PCI in stable patients has recently been debated, but little data exists about the potential benefit of complete revascularization (CR) in stable MVD. We investigated the prognostic benefit of CR in patients undergoing PCI for stable disease. Methods...

article

New Frontiers for Internal Audit Research^*

Margaret H. Christ, Marc Eulerich, Ronja Krane, David A. Wood

Accounting Perspectives > 20 > 4 > 449 - 475

Internal audit provides useful and valuable services to organizations, and academic research has established its importance in improving corporate governance. However, the body of internal audit research is still relatively small. Indeed, there are many emerging, lesser‐known topics and practitioners would like guidance. The primary focus of this paper is to make specific recommendations for future...

article

Insights into colloidal membrane fouling mechanisms for nanofiltration of surface water using single and hybrid membrane processes

Setareh Heidari, Mehdi Amirinejad, Seyedeh Sima Mirzadeh, David A. Wood

Polymers for Advanced Technologies > 32 > 6 > 2517 - 2530

Colloidal membrane fouling mechanisms were modeled for experimental data provided for nanofiltration of surface water by single and hybrid membrane systems. The hybrid system is composed of coagulation/activated carbon adsorption and bare polyethersulfone or mixed‐matrix membranes. The comprehensive modeling of these membrane systems was performed by three explicit equations to evaluate the effects...

article

Ten year follow‐up of high‐risk patients treated during the early experience with transcatheter aortic valve replacement

Janarthanan Sathananthan, Sandra Lauck, Jopie Polderman, Maggie Yu, more

Catheterization and Cardiovascular Interventions > 97 > 3 > E431 - E437

Background The long‐term clinical performance of transcatheter heart valves (THV) is unknown. Aims This study assessed the clinical outcomes, rate of structural valve deterioration (SVD) and bioprosthetic valve failure in patients after transcatheter aortic valve replacement (TAVR) to 10‐year follow‐up. Methods Consecutive patients undergoing TAVI for native aortic valve stenosis or failed aortic...

article

Prognostic implications of baseline 6‐min walk test performance in intermediate risk patients undergoing transcatheter aortic valve replacement

Janarthanan Sathananthan, Philip Green, Matthew Finn, David A. Wood, more

Catheterization and Cardiovascular Interventions > 97 > 1 > E154 - E160

Background While slow gait speed is known to be associated with poor outcomes in patients at high surgical risk who undergo transcatheter aortic valve replacement (TAVR), the prognostic significance of slow gait speed in intermediate risk TAVR patients is poorly understood. Objectives We assessed the association between baseline 6‐min walk test (6MWT) performance and both 2‐year mortality and health...

article

Single‐center prospective study examining use of the Wattson temporary pacing guidewire for transcatheter aortic valve replacement

Mark Hensey, Janarthanan Sathananthan, Abdullah Alkhodair, Uri Landes, more

Catheterization and Cardiovascular Interventions > 96 > 4 > 968 - 971

Objectives To assess the safety and efficacy of the Wattson temporary pacing guidewire. Background Transcatheter aortic valve replacement (TAVR) requires a guidewire for device delivery and generally requires temporary pacing wire for burst and back‐up pacing. The Wattson wire provides concomitant support and bipolar pacing without the need to place a temporary venous pacemaker (TVP). Methods...

article

Implications of hydrodynamic testing to guide sizing of self‐expanding transcatheter heart valves for valve‐in‐valve procedures

Janarthanan Sathananthan, Mark Hensey, Rob Fraser, Uri Landes, more

Catheterization and Cardiovascular Interventions > 96 > 3 > E332 - E340

Aims The commonly used valve‐in‐valve (VIV) app recommends sizing based on dimensions of both the transcatheter heart valve (THV) and bioprosthetic surgical valve. The implications of hydrodynamic testing to guide VIV sizing are poorly understood. This bench study assessed the hydrodynamic performance of different sizes of self‐expanding supra‐annular THVs in three different surgical aortic bioprostheses...

article

Post‐procedure protocol to facilitate next‐day discharge: Results of the multidisciplinary, multimodality but minimalist TAVR study

Sandra B. Lauck, Janarthanan Sathananthan, Julie Park, Leslie Achtem, more

Catheterization and Cardiovascular Interventions > 96 > 2 > 450 - 458

Background Evidence is lacking to standardize post‐procedure care after transcatheter aortic valve replacement (TAVR). Objective We report on the findings of the post‐procedure sub‐study of the multimodality, multidisciplinary but minimalist TAVR (3M TAVR) study. Methods A standardized protocol to guide monitoring, early mobilization, reconditioning, communication, and criteria‐driven discharge...

article

Comparison of Exergy Losses for Reformers Involved in Hydrogen and Synthesis Gas Production

Alireza Behroozsarand, David A. Wood

Chemical Engineering & Technology > 42 > 12 > 2681 - 2690

A user‐coded, customized methodology for exergy balance and analysis of chemical and thermal processes is developed with the Aspen HYSYS process simulator, to assess and explain exergy loss in steam methane reforming. Exergy analysis is presented for four configurations of primary and secondary reformers to produce synthesis gas: (1) an autothermal reformer (ATR) alone, (2) a top‐fired reformer (TFR)...

article

Simultaneous biosorption of nickel and cadmium by the brown algae Cystoseria indica characterized by isotherm and kinetic models

Mohammad Khajavian, David A. Wood, Ahmad Hallajsani, Nasrollah Majidian

Applied Biological Chemistry > 2019 > 62 > 1 > 1-12

Biosorption is an effective way of extracting heavy metal ions from aqueous solutions of various compositions. The brown algae, Cystoseria indica, when treated with sodium chloride, demonstrates significant capacity to extract cadmium and nickel, simultaneously, from aqueous solutions. The batch system was running over wide ranges of initial metal ion concentrations (5–150 mg/L), pH (2–6), adsorbent...

article

Reducing welding repair requirements in refinery pressure vessel manufacturing: a case study applying six sigma principles

Ahmadreza Rezaei, Mohammad Ehsanifar, David A. Wood

International Journal on Interactive Design and Manufacturing (IJIDeM) > 2019 > 13 > 3 > 1089-1102

High welding intensity is an integral part of the refinery pressure vessel manufacturing process. Weld defects are also responsible for a substantial part of the rework requirements, waste and operating costs associated with such manufacturing. Seeking ways to reduce welding defects and improve the efficiency of the manufacturing process is therefore critical for profitability and fulfills customer...

article

Predictions of Gross Calorific Value of Indian Coals from their Moisture and Ash Content

Priya Kumari, Ashok K. Singh, David A. Wood, Bodhisatwa Hazra

Journal of the Geological Society of India > 2019 > 93 > 4 > 437-442

India, the world’s third largest coal producing country, is expected to maintain strong dependency on coal for the coming few decades. The gross calorific value (GCV) of coal is a key yardstick for many end users purchasing coal from suppliers, as it provides a clear measure of the useful energy content of a coal. Several methods are available to predict GCV using either moisture content and/or ash...

article

A machine learning approach to predict drilling rate using petrophysical and mud logging data

Mohammad Sabah, Mohsen Talebkeikhah, David A. Wood, Rasool Khosravanian, more

Earth Science Informatics > 2019 > 12 > 3 > 319-339

Predicting the drilling rate of penetration (ROP) is one approach to optimizing drilling performance. However, as ROP behavior is unique to specific geological conditions its application is not straightforward. Moreover, ROP is typically affected by various operational factors (e.g. bit type, weight-on-bit, rotation rate, etc.) as well as the geological characteristics of the rocks being penetrated...

article

Sensitivity analysis and optimization capabilities of the transparent open-box learning network in predicting coal gross calorific value from underlying compositional variables

David A. Wood

Modeling Earth Systems and Environment > 2019 > 5 > 3 > 753-766

Prediction performance and optimization attributes of the transparent open-box learning networks (TOB) applied to a large database of US coals are further explored to complement recently published base-case analysis. Nine sensitivity cases configured with the 6339 data records allocated in different ways to the TOB’s tuning, training, and testing subsets are developed. These cases demonstrate for...

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TRANSCATHETER AORTIC VALVE REPLACEMENT (24)
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INFONA - science communication portal

Search results for: David A. Wood

Optimising brain age estimation through transfer learning: A suite of pre‐trained foundation models for improved performance and generalisability in a clinical setting

Biostratigraphy, microfacies, and reservoir quality of the Oligocene Qom Formation (Kharzan Section, north-west of Ardestan, central Iran)

The Impact of Audit Technology on Audit Task Outcomes: Evidence for Technology‐Based Audit Techniques*

The Influence of Management's Internal Audit Experience on Earnings Management*

Outcomes and feasibility of redo‐TAVR after Sapien 3 Ultra TAVR in extremely‐undersized versus nominally‐sized annuli

A Framework for Using Robotic Process Automation for Audit Tasks*

Complete revascularization in stable multivessel coronary artery disease: A real world analysis from the British Columbia Cardiac Registry

New Frontiers for Internal Audit Research^*

Insights into colloidal membrane fouling mechanisms for nanofiltration of surface water using single and hybrid membrane processes

Ten year follow‐up of high‐risk patients treated during the early experience with transcatheter aortic valve replacement

Prognostic implications of baseline 6‐min walk test performance in intermediate risk patients undergoing transcatheter aortic valve replacement

Single‐center prospective study examining use of the Wattson temporary pacing guidewire for transcatheter aortic valve replacement

Implications of hydrodynamic testing to guide sizing of self‐expanding transcatheter heart valves for valve‐in‐valve procedures

Post‐procedure protocol to facilitate next‐day discharge: Results of the multidisciplinary, multimodality but minimalist TAVR study

Comparison of Exergy Losses for Reformers Involved in Hydrogen and Synthesis Gas Production

Simultaneous biosorption of nickel and cadmium by the brown algae Cystoseria indica characterized by isotherm and kinetic models

Reducing welding repair requirements in refinery pressure vessel manufacturing: a case study applying six sigma principles

Predictions of Gross Calorific Value of Indian Coals from their Moisture and Ash Content

A machine learning approach to predict drilling rate using petrophysical and mud logging data

Sensitivity analysis and optimization capabilities of the transparent open-box learning network in predicting coal gross calorific value from underlying compositional variables

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