Search results for: Robert Hayes

Items from 1 to 20 out of 30 results

article

Probing the effect of glycosaminoglycan depletion on integrin interactions with collagen I fibrils in the native extracellular matrix environment

Jonathan Roth, Cody L. Hoop, Jonathan K. Williams, Robert Hayes, more

Fibrillar collagen–integrin interactions in the extracellular matrix (ECM) regulate a multitude of cellular processes and cell signalling. Collagen I fibrils serve as the molecular scaffolding for connective tissues throughout the human body and are the most abundant protein building blocks in the ECM. The ECM environment is diverse, made up of several ECM proteins, enzymes, and proteoglycans. In...

article

Identification performance of evidential value estimation for ridge-based biometrics

Johannes Kotzerke, Hao Hao, Stephen A. Davis, Robert Hayes, more

EURASIP Journal on Information Security > 2016 > 2016 > 1 > 1-10

Law enforcement agencies around the world use ridge-based biometrics, especially fingerprints, to fight crime. Fingermarks that are left at a crime scene and identified as potentially having evidential value (EV) in a court of law are recorded for further forensic analysis. Here, we test our evidential value algorithm (EVA) which uses image features trained on forensic expert decisions for 1428 fingermarks...

article

Nanoindentation as an alternative to mechanical abrasion for assessing wear of polymeric automotive coatings

Jennifer David, Robert Hayes, Jeremy Hui, Richard Nay

Journal of Coatings Technology and Research > 2016 > 13 > 4 > 677-690

Mechanical abrasion followed by transmission delta-haze measurement is a standard means to assess wear in polymeric silicone automotive hard coatings. However, the drawbacks of this abrasion–transmission (A–T) technique (drift, variability, sample size, and test time) make an alternative measurement method desirable. Literature reports have shown that the ratio of hardness to modulus can successfully...

chapter

Identification Performance of Evidential Value Estimation for Fingermarks

Johannes Kotzerke, Stephen Davis, Robert Hayes, Luuk Spreeuwers, more

2015 International Conference of the Biometrics Special Interest Group (BIOSIG) > 1 - 6

2015 International Conference of the Biometrics Special Interest Group (BIOSIG)

Law enforcement agencies around the world use biometrics and fingerprints to solve and fight crime. Forensic experts are needed to record fingermarks at crime scenes and to ensure those captured are of evidential value. This process needs to be automated and streamlined as much as possible to improve efficiency and reduce workload. It has previously been demonstrated that is possible to estimate a...

chapter

Measure of nonlinearity for hyperbolic distributed parameter systems

Adrian Fuxman, Fraser Forbes, Robert Hayes

2007 European Control Conference (ECC) > 5580 - 5586

2007 European Control Conference (ECC)

It is well known that virtually all processes are nonlinear. For analysis and control, it is important to understand the process nonlinearity. In this paper, we introduce a measure of steady-state nonlinearity for processes modeled by partial differential equations. Drawing from results for lumped parameter systems, the nonlinearity measure is based on the local geometry of the steady-state map. Tangential...

chapter

Advertising.com: Mobile optimization and predictive segments

Andrew Strauss, Robert Hayes, Colin Leslie, Elizabeth Stettinius, more

2014 Systems and Information Engineering Design Symposium (SIEDS) > 222 - 226

2014 Systems and Information Engineering Design Symposium (SIEDS)

Today the advertising industry is becoming increasingly dependent on the Internet to deliver advertisements to viewers. Third party advertising networks such as Advertising.com, a division of AOL Inc., are utilizing targeted advertising strategies to make Internet advertising more profitable. Targeted advertising utilizes cookies to track users and target them with advertisements based on attributes...

article

Structure and dynamics of the interfacial layer between ionic liquids and electrode materials

Rob Atkin, Natalia Borisenko, Marcel Drüschler, Frank Endres, more

Journal of Molecular Liquids > 2014 > 192 > Complete > 44-54

In this overview paper we present a combined in situ STM, AFM and EIS study on the structure and dynamics of the interfacial layers between Au(111) and two extremely pure ionic liquids, namely [Py _1,4 ]FAP and [EMIM]FAP. The combination of these methods provides valuable information for both neutral and electrified interfaces. In situ STM and AFM results reveal that a multilayered ion morphology...

article

The Nature of Hydrogen Bonding in Protic Ionic Liquids

Robert Hayes, Silvia Imberti, Gregory G. Warr, Rob Atkin

Angewandte Chemie > 125 > 17 > 4721 - 4725

Die Größe, Richtung, Stärke und Verteilung von Wasserstoffbrücken in mehreren protischen ionischen Flüssigkeiten (PILs) wurde durch Neutronenbeugung und Computersimulationen ermittelt. Die Wasserstoffbrücken variieren beträchtlich von kurzen, linearen bis zu langen, zwei‐ und dreifach gegabelten Bindungen. Die Natur der Wasserstoffbrücke spiegelt die makroskopischen Eigenschaften der PIL wider.

article

The Nature of Hydrogen Bonding in Protic Ionic Liquids

Robert Hayes, Silvia Imberti, Gregory G. Warr, Rob Atkin

Angewandte Chemie International Edition > 52 > 17 > 4623 - 4627

The size, direction, strength, and distribution of hydrogen bonds in several protic ionic liquids (PILs) has been elucidated using neutron diffraction and computer simulation. There is significant variation in PIL hydrogen bond interactions ranging from short and linear to long and bi‐/trifurcated. The nature of the PIL's hydrogen bonds reflects its macroscopic properties.

article

Competitive no, co and hydrocarbon oxidation reactions over a diesel oxidation catalyst

Meshari AL‐Harbi, Robert Hayes, Martin Votsmeier, William S. Epling

The Canadian Journal of Chemical Engineering > 90 > 6 > 1527 - 1538

The oxidation of NO, CO and hydrocarbons (HC) individually, in mixtures, and with NO₂ were investigated over a monolith‐supported Pt/Al₂O₃ catalyst under oxidising conditions. Although competitive adsorption and inhibition by other species on oxidation reactions is a relatively well‐known phenomenon, this study represents a more comprehensive examination of such effects between key components in vehicle...

article

In situ STM, AFM and DTS study of the interface 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate/Au(111)

Timo Carstens, Robert Hayes, Sherif Zein El Abedin, Brendan Corr, more

Electrochimica Acta > 2012 > 82 > Complete > 48-59

The Au(111)/1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([HMIm]FAP) interface is examined using in situ scanning tunnelling microscopy (STM), atomic force microscopy (AFM) and distance tunnelling spectroscopy (DTS). Both in situ STM and AFM results reveal that multiple ionic liquid (IL) interfacial layers form at the Au(111) electrode interface. The applied potential determines...

article

How Water Dissolves in Protic Ionic Liquids

Robert Hayes, Silvia Imberti, Gregory G. Warr, Rob Atkin

Angewandte Chemie > 124 > 30 > 7586 - 7589

Wasser in ionischen Flüssigkeiten: Wenn gleiche Mengen an Wasser und der protischen ionischen Flüssigkeit Ethylammoniumnitrat vermischt werden, entsteht eine bikontinuierliche Nanostruktur. Diese Nanostruktur ähnelt wässrigen Tensid‐Mesophasen, ist aber mindestens eine Größenordnung kleiner als diese. Die lokalen Strukturen von Wasser und der ionischen Flüssigkeit sind denen der reinen Flüssigkeiten...

article

How Water Dissolves in Protic Ionic Liquids

Robert Hayes, Silvia Imberti, Gregory G. Warr, Rob Atkin

Angewandte Chemie International Edition > 51 > 30 > 7468 - 7471

Water in ionic liquids: When equal masses of water and the protic ionic liquid ethylammonium nitrate are mixed a bicontinuous nanostructure results. This nanostructure resembles aqueous surfactant mesophases but has length scales at least an order of magnitude smaller. The local structure of both the water and the ionic liquid are strikingly similar to that found in the pure liquids (see picture).

article

Inverse Hysteresis Phenomena During CO and C₃H₆ Oxidation over a Pt/Al₂O₃ Catalyst

Ali Abedi, Robert Hayes, Martin Votsmeier, William S. Epling

Catalysis Letters > 2012 > 142 > 8 > 930-935

It is well known that conversion as a function of temperature hysteresis can occur during ignition and extinction exothermic reaction experiments, such as CO oxidation over Pt/Al₂O₃, with the activity during the ignition process not matching that during the extinction process. Conversions being higher during extinction than that during ignition are often observed. Several explanations have been proposed...

article

Furfural reduction mechanism of a zinc‐dependent alcohol dehydrogenase from Cupriavidus necator JMP134

ChulHee Kang, Robert Hayes, Emiliano J. Sanchez, Brian N. Webb, more

Molecular Microbiology > 83 > 1 > 85 - 95

FurX is a tetrameric Zn‐dependent alcohol dehydrogenase (ADH) from Cupriavidus necator JMP134. The enzyme rapidly reduces furfural with NADH as the reducing power. For the first time among characterized ADHs, the high‐resolution structures of all reaction steps were obtained in a time‐resolved manner, thereby illustrating the complete catalytic events of NADH‐dependent reduction of furfural and the...

article

Double Layer Structure of Ionic Liquids at the Au(111) Electrode Interface: An Atomic Force Microscopy Investigation

Robert Hayes, Natalia Borisenko, Matthew K. Tam, Patrick C. Howlett, more

The Journal of Physical Chemistry C > 2011 > 115 > 14 > 6855 - 6863

article

How much longer will Africa have to depend on western nations for support of its capacity‐building efforts for biomedical research?

Emmanuel Philip Laabes, Rizwana Desai, Stella Muyanja Zawedde, Robert Hayes Glew

Tropical Medicine & International Health > 16 > 3 > 258 - 262

Advances in biomedical research techniques have resulted in the conquest of many diseases and the improvement in the health and well‐being of populations, yet sub‐Saharan Africa continues to lag behind western nations in terms of research infrastructure and capacity. The increasing numbers of links and collaborations between western institutions of higher learning and teaching hospitals and universities...

article

Hydrogen Generation and Coke Formation over a Diesel Oxidation Catalyst under Fuel Rich Conditions ^†

Meshari AL-Harbi, Jin-Yong Luo, Robert Hayes, Martin Votsmeier, more

The Journal of Physical Chemistry C > 2011 > 115 > 4 > 1156 - 1162

article

Up-regulation of histidine decarboxylase expression and histamine content in B16F10 murine melanoma cells

Steven C. Davis, Sheena Clark, J. Robert Hayes, Todd L. Green, more

Inflammation Research > 2011 > 60 > 1 > 55-61

Objective and design This study was conducted to determine if differences in histidine decarboxylase expression and histamine levels exist between B16F10 melanoma cells and non-cancerous Melan-A melanocytes. Methods Immunofluorescence and western blot analysis were used to detect and compare histidine decarboxylase protein levels. Enzyme-linked immunoassay was used to detect, measure, and compare...

article

Daily skin cleansing with chlorhexidine did not reduce the rate of central-line associated bloodstream infection in a surgical intensive care unit

Kyle J. Popovich, Bala Hota, Robert Hayes, Robert A. Weinstein, more

Intensive Care Medicine > 2010 > 36 > 5 > 854-858

Purpose Cleansing the skin of intensive care unit (ICU) patients daily with chlorhexidine gluconate (CHG) has been associated with beneficial effects, including a reduction in central-line-associated bacteremias (CLABSIs). Most studies have been done in medical ICUs. In this study, we evaluated the effectiveness of daily chlorhexidine skin cleansing on CLABSI rates in a surgical ICU. Methods In...

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INFONA - science communication portal

Search results for: Robert Hayes

Probing the effect of glycosaminoglycan depletion on integrin interactions with collagen I fibrils in the native extracellular matrix environment

Identification performance of evidential value estimation for ridge-based biometrics

Nanoindentation as an alternative to mechanical abrasion for assessing wear of polymeric automotive coatings

Identification Performance of Evidential Value Estimation for Fingermarks

Measure of nonlinearity for hyperbolic distributed parameter systems

Advertising.com: Mobile optimization and predictive segments

Structure and dynamics of the interfacial layer between ionic liquids and electrode materials

The Nature of Hydrogen Bonding in Protic Ionic Liquids

The Nature of Hydrogen Bonding in Protic Ionic Liquids

Competitive no, co and hydrocarbon oxidation reactions over a diesel oxidation catalyst

In situ STM, AFM and DTS study of the interface 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate/Au(111)

How Water Dissolves in Protic Ionic Liquids

How Water Dissolves in Protic Ionic Liquids

Inverse Hysteresis Phenomena During CO and C₃H₆ Oxidation over a Pt/Al₂O₃ Catalyst

Furfural reduction mechanism of a zinc‐dependent alcohol dehydrogenase from Cupriavidus necator JMP134

Double Layer Structure of Ionic Liquids at the Au(111) Electrode Interface: An Atomic Force Microscopy Investigation

How much longer will Africa have to depend on western nations for support of its capacity‐building efforts for biomedical research?

Hydrogen Generation and Coke Formation over a Diesel Oxidation Catalyst under Fuel Rich Conditions ^†

Up-regulation of histidine decarboxylase expression and histamine content in B16F10 murine melanoma cells

Daily skin cleansing with chlorhexidine did not reduce the rate of central-line associated bloodstream infection in a surgical intensive care unit

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