Search results for: John Carroll

Items from 1 to 20 out of 91 results

article

Defect‐Induced, Ferroelectric‐Like Switching and Adjustable Dielectric Tunability in Antiferroelectrics

Hao Pan, Zishen Tian, Megha Acharya, Xiaoxi Huang, more

Advanced Materials > 35 > 24 > n/a - n/a

Antiferroelectrics, which undergo a field‐induced phase transition to ferroelectric order that manifests as double‐hysteresis polarization switching, exhibit great potential for dielectric, electromechanical, and electrothermal applications. Compared to their ferroelectric cousins, however, considerably fewer efforts have been made to understand and control antiferroelectrics. Here, it is demonstrated...

article

Epidemiology of surgical site infections after solid organ transplants in the period 2015–2019: A single‐center retrospective cohort study

Manuela Carugati, Sana Arif, Debra Lynn Sudan, Bradley Henry Collins, more

American Journal of Transplantation > 22 > 12 > 3021 - 3030

Surgical site infections (SSI) are severe complications of solid organ transplant (SOT). This retrospective study assessed the epidemiology of and outcomes associated with invasive primary SSI (IP‐SSI) occurring within 3 months of transplantation in adult SOT recipients at Duke University over a 5‐year period (2015–2019). Among 2073 consecutive SOT recipients, 198 IP‐SSI were identified. The IP‐SSI...

article

Gendering the seed: Mitochondrial replacement techniques and the erasure of the maternal

Robert Sparrow, Catherine Mills, John Carroll

Bioethics > 35 > 7 > 608 - 614

In order to avoid the implication that ‘mitochondrial replacement techniques’ (MRT) would produce ‘three parent babies’, discourses around these techniques typically dismiss the contribution of the mitochondria to genetic parenthood and personal identity. According to many participants in debates about MRT, ‘real parenthood’ is a matter of contributing nuclear DNA, which in turn implies that men and...

article

Percutaneous edge‐to‐edge mitral valve repair may rescue select patients in cardiogenic shock: Findings from a single center case series

Kelsey Flint, Andreas Brieke, Dominik Wiktor, John Carroll

Catheterization and Cardiovascular Interventions > 94 > 2 > E82 - E87

Background Patients with severe mitral regurgitation (MR) and cardiogenic shock are typically too high risk for immediate surgery; however, percutaneous edge‐to‐edge mitral valve repair (pMVr) may be reasonable in select patients. Aim Describe characteristics and outcomes of patients who underwent pMVr with and without shock at a single center. Methods Chart review of all patients who underwent...

article

Reduction in anastomotic flow disturbance within a modified end‐to‐side arteriovenous fistula configuration: Results of a computational flow dynamic model

John Carroll, Ramon L Varcoe, Tracie Barber, Anne Simmons

Nephrology > 24 > 2 > 245 - 251

Aim We sought to determine if a modification to the peri‐anastomotic vein configuration during end‐to‐side arteriovenous fistula (AVF) creation would achieve a favourable haemodynamic environment compared with the standard acute‐angle AVF. Methods Computational fluid dynamics (CFD) modelling of two end‐to‐side AVF geometries (smooth‐vein‐loop vs. acute‐angle) allowed for haemodynamic modelling...

article

Use of electrostatic precipitators in small-scale biomass furnaces to reduce particulate emissions from a range of feedstocks

John Carroll, John Finnan

Biosystems Engineering > 2017 > 163 > C > 94-102

The results of a study into the precipitation efficiencies of two different electrostatic precipitator (ESP) types (chimney top with manual cleaning and in-line with automated cleaning) using three biomass fuels with low (wood), medium (willow) and high (tall fescue) particulate emission levels are presented. Testing showed that precipitation efficiencies of greater than 70% are possible in an inline...

article

TCT-792 Direct 3D Quantitative Measurements and Optimal View Determination for TAVR Procedure by Computed Tomography

Javier Valle, James Chen, Adam Hansgen, Dominik Wiktor, more

Journal of the American College of Cardiology > 2017 > 70 > 18(S) > B269-B270

article

TCT-523 Innovative 3D Computed Tomography (CT) Modeling and Image Analyses to Optimize Left Atrial Appendage Closure

Dominik Wiktor, James Chen, Adam Hansgen, Javier Valle, more

Journal of the American College of Cardiology > 2017 > 70 > 18(S) > B217

article

Invited Commentary

John Carroll

The Annals of Thoracic Surgery > 2017 > 104 > 3 > 1093-1094

article

Transcatheter Versus Surgical Aortic Valve Replacement

J. Matthew Brennan, Laine Thomas, David J. Cohen, David Shahian, more

Journal of the American College of Cardiology > 2017 > 70 > 4 > 439-450

Randomized trials support the use of transcatheter aortic valve replacement (TAVR) for the treatment of aortic stenosis in high- and intermediate-risk patients, but the generalizability of those results in clinical practice has been challenged.The aim of this study was to determine the safety and effectiveness of TAVR versus surgical aortic valve replacement (SAVR), particularly in intermediate- and...

chapter

Design of a decision support system to reduce net radiative forcing via optimal contrail generation

Caroline Abramson, Faie Almofeez, John Carroll, Chris Margopoulos

2017 Systems and Information Engineering Design Symposium (SIEDS) > 330 - 335

2017 Systems and Information Engineering Design Symposium (SIEDS)

With global flight distance projected to increase by a factor of four by 2050, contrail generation is expected to increase by a similar factor. Optimized contrail presence can lead to decreased net radiative forcing (RF): the phenomenon that occurs when heat is trapped within the Earth's atmosphere. RF is projected to increase by 280% by 2050, adding significantly to global warming. A system needs...

article

COMPARISON OF THE EFFECTS OF BALLOON EXPANDABLE AND SELF EXPANDABLE TRANSCATHETER AORTIC VALVE REPLACEMENT ON THE DIMENSIONS OF THE MITRAL VALVE ANNULUS AND MITRAL REGURGITATION SEVERITY

Joseph Burke, Ernesto Salcedo, Tamas Seres, Robert Quaife, more

Journal of the American College of Cardiology > 2017 > 69 > 11(S) > 1467

article

Transcatheter Mitral Valve Replacement for Patients With Symptomatic Mitral Regurgitation

David W.M. Muller, Robert Saeid Farivar, Paul Jansz, Richard Bae, more

Journal of the American College of Cardiology > 2017 > 69 > 4 > 381-391

Symptomatic mitral regurgitation (MR) is associated with high morbidity and mortality that can be ameliorated by surgical valve repair or replacement. Despite this, many patients with MR do not undergo surgery. Transcatheter mitral valve replacement (TMVR) may be an option for selected patients with severe MR.This study aimed to examine the effectiveness and safety of TMVR in a cohort of patients...

article

Forage productivity and profitability in newly-established open pasture, silvopasture, and thinned forest production systems

Joseph Orefice, Richard G. Smith, John Carroll, Heidi Asbjornsen, more

Agroforestry Systems > 2019 > 93 > 1 > 51-65

There is growing interest among farmers in the northeast US in silvopasture and other practices that would help them expand their agricultural land base in this forested region. Unfortunately, little quantitative data exist regarding forage performance and economic outcomes associated with different forest-to-agriculture conversion strategies, particularly for the northern tier of states. This research...

article

Soil and understory plant dynamics during conversion of forest to silvopasture, open pasture, and woodlot

Joseph Orefice, Richard G. Smith, John Carroll, Heidi Asbjornsen, more

Agroforestry Systems > 2017 > 91 > 4 > 729-739

Little is known regarding the impact of converting northern hardwood forests to pasture or silvopasture. Our objective was to investigate how understory plant communities and soil physical and chemical properties respond during the first 2 years following conversion of northern hardwood forest to pasture. To accomplish this, we established three forest conversion treatments (silvopasture, open pasture,...

chapter

Semi-supervised Training of a Statistical Parser from Unlabeled Partially-Bracketed Data

Rebecca Watson, Ted Briscoe, John Carroll

Text, Speech and Language Technology > Trends in Parsing Technology > 277-291

Extant statistical parsers require extensive and detailed treebanks Treebank , as many of their lexical and structural parameters are estimated in a fully-supervised Training!fully-supervised fashion from treebank derivations.

chapter

The Automatic Acquisition of Verb Subcategorisations and Their Impact on the Performance of an HPSG Parser

John Carroll, Alex C. Fang

Lecture Notes in Computer Science > Natural Language Processing – IJCNLP 2004 > Theories and Formalisms for Morphology, Syntax and Semantics > 646-654

We describe the automatic acquisition of a lexicon of verb subcategorisations from a domain-specific corpus, and an evaluation of the impact this lexicon has on the performance of a “deep”, HPSG parser of English. We conducted two experiments to determine whether the empirically extracted verb stems would enhance the lexical coverage of the grammar and to see whether the automatically extracted verb...

chapter

Developments in Parsing Technology: From Theory to Application

Harry Bunt, John Carroll, Giorgio Satta

Text, Speech and Language Technology > New Developments in Parsing Technology > 1-18

chapter

High Precision Extraction of Grammatical Relations

John Carroll, Ted Briscoe

Text, Speech and Language Technology > New Developments in Parsing Technology > 57-72

A parsing system returning analyses in the form of sets of grammatical relations can obtain high precision if it hypothesises a particular grammatical relation only when it is certain that the relation is correct. We operationalise this technique-in a statistical parser using a manually-developed wide-coverage grammar of English — by only returning relations that form part of all analyses licensed...

chapter

High Efficiency Realization for a Wide-Coverage Unification Grammar

John Carroll, Stephan Oepen

Lecture Notes in Computer Science > Natural Language Processing – IJCNLP 2005 > Rule-Based Parsing > 165-176

We give a detailed account of an algorithm for efficient tactical generation from underspecified logical-form semantics, using a wide-coverage grammar and a corpus of real-world target utterances. Some earlier claims about chart realization are critically reviewed and corrected in the light of a series of practical experiments. As well as a set of algorithmic refinements, we present two novel techniques:...

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Search results for: John Carroll

Defect‐Induced, Ferroelectric‐Like Switching and Adjustable Dielectric Tunability in Antiferroelectrics

Epidemiology of surgical site infections after solid organ transplants in the period 2015–2019: A single‐center retrospective cohort study

Gendering the seed: Mitochondrial replacement techniques and the erasure of the maternal

Percutaneous edge‐to‐edge mitral valve repair may rescue select patients in cardiogenic shock: Findings from a single center case series

Reduction in anastomotic flow disturbance within a modified end‐to‐side arteriovenous fistula configuration: Results of a computational flow dynamic model

Use of electrostatic precipitators in small-scale biomass furnaces to reduce particulate emissions from a range of feedstocks

TCT-792 Direct 3D Quantitative Measurements and Optimal View Determination for TAVR Procedure by Computed Tomography

TCT-523 Innovative 3D Computed Tomography (CT) Modeling and Image Analyses to Optimize Left Atrial Appendage Closure

Invited Commentary

Transcatheter Versus Surgical Aortic Valve Replacement

Design of a decision support system to reduce net radiative forcing via optimal contrail generation

COMPARISON OF THE EFFECTS OF BALLOON EXPANDABLE AND SELF EXPANDABLE TRANSCATHETER AORTIC VALVE REPLACEMENT ON THE DIMENSIONS OF THE MITRAL VALVE ANNULUS AND MITRAL REGURGITATION SEVERITY

Transcatheter Mitral Valve Replacement for Patients With Symptomatic Mitral Regurgitation

Forage productivity and profitability in newly-established open pasture, silvopasture, and thinned forest production systems

Soil and understory plant dynamics during conversion of forest to silvopasture, open pasture, and woodlot

Semi-supervised Training of a Statistical Parser from Unlabeled Partially-Bracketed Data

The Automatic Acquisition of Verb Subcategorisations and Their Impact on the Performance of an HPSG Parser

Developments in Parsing Technology: From Theory to Application

High Precision Extraction of Grammatical Relations

High Efficiency Realization for a Wide-Coverage Unification Grammar

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