J. Robertson

Publication List Details

Period

1785 - 2008

Number

104

Co-Authors

An embodied interface for teaching computational thinking (2008)

Good, J, Romero, P, Du Boulay, B, Reid, H, Howland, K, Robertson, J

We describe an innovative educational system designed to, firstly, motivate young people to engage with computational concepts and secondly, provide them with tools to do so in an embodied manner....

Embodied interaction in authoring environments (2007)

Romero, P, Good, J, Robertson, J, Du Boulay, B, Reid, H, Howland, K

This paper sketches a research programme related to investigating the ways that embodied interaction can be used to teach and learn computing concepts. It considers the advantages and disadvantages...

The beta Phase of Multiferroic Bismuth Ferrite and its beta-gamma Metal-Insulator Transition (2007)

Palai, R., Katiyar, R. S., Schmid, H., Tissot, P., Clark, S. J., Robertson, J., ...

We show that epitaxial (001) thin films of multiferroic bismuth ferrite BiFeO3 are monoclinic at room temperature instead of tetragonal or Rhombohedral as reported earlier . We report a orthorhombic...

Electron Transport and Hot Phonons in Carbon Nanotubes (2007)

Lazzeri, M., Piscanec, S., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate the key role of phonon occupation in limiting the high-field ballistic transport in metallic carbon nanotubes. In particular, we provide a simple analytic formula for the electron...

Phonon Linewidths and Electron Phonon Coupling in Nanotubes (2007)

Lazzeri, Michele, Piscanec, S., Mauri, Francesco, Ferrari, A. C., Robertson, J.

We prove that Electron-phonon coupling (EPC) is the major source of broadening for the Raman G and G- peaks in graphite and metallic nanotubes. This allows us to directly measure the optical-phonon...

Reliability of speaking and maximum voice range measures in screening for dysphonia (2007)

Ma, E, Robertson, J, Radford, C, Vagne, S, El-Halabi, R, Yiu, E

Speech range profile (SRP) is a graphical display of frequency-intensity occurring interactions during functional speech activity. Few studies have suggested the potential clinical applications of...

Inferring effective interactions from the local density of states: application to STM data from Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ (2006)

Jamei, R., Robertson, J., Kim, E-A., Fang, A., Kapitulnik, A., Kivelson, S. A.

While the influence of impurities on the local density of states (LDOS) in a metal is notoriously non-local due to interference effects, low order moments of the LDOS in general can be shown to...

Kohn Anomalies and Electron-Phonon Interaction in Graphite (2006)

Piscanec, S., Lazzeri, M., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate that graphite phonon dispersions have two Kohn anomalies at the Gamma-E_2g and K-A\'1 modes. The anomalies are revealed by two sharp kinks. By an exact analytic derivation, we show...

Potential uses for bracken (Pteridium aquilinum (L.) Kuhn) in organic agrculture (2006)

Donnelly, E, Robertson, J, Robinson, D

Bracken is a weed species due to its toxic nature and adverse effects on agriculture and ecology. This poster reviews research into historical uses for fronds and litter harvested as part of...

Soil sustainability in organic agricultural production (2006)

May-Roberts, S, Robertson, J, Killham, K, Paton, G

Traditionally, the assessment of soil sustainability and the potential impact of cultivation are based upon the application of chemical procedures. In the absence of a biological context, these...

Defect energy levels in HfO2 high-dielectric-constant gate oxide. (2005)

Xiong, K., Robertson, J., Gibson, M. C., Clark, S. J.

This letter presents calculations of the energy levels of the oxygen vacancy and oxygen interstitial defects in HfO2 using density functional methods that do not need an empirical band gap...

Structure and formation energy of carbon nanotube caps (2005)

Reich, S., Li, L., Robertson, J.

We present a detailed study of the geometry, structure and energetics of carbon nanotube caps. We show that the structure of a cap uniquely determines the chirality of the nanotube that can be...

Phonon Linewidths and Electron Phonon Coupling in Nanotubes (2005)

Lazzeri, Michele, Piscanec, S., Mauri, Francesco, Ferrari, A. C., Robertson, J.

We prove that Electron-phonon coupling (EPC) is the major source of broadening for the Raman G and G- peaks in graphite and metallic nanotubes. This allows us to directly measure the optical-phonon...

Methane combustion over Pd/SiO2 catalysts with different degrees of hydrophobicity (2005)

Araya Figueroa, Paulo E., Guerrero, S., Robertson, J., Gracia, F. J.

The combustion of methane has been studied over 1% Pd catalysts supported on commercial silica with different hydrophobicity, prepared by chlorine free precursors. It was found that, when no water is...

Electron Transport and Hot Phonons in Carbon Nanotubes (2005)

Lazzeri, M., Piscanec, S., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate the key role of phonon occupation in limiting the high-field ballistic transport in metallic carbon nanotubes. In particular, we provide a simple analytic formula for the electron...

Ab initio resonant Raman spectra of diamond-like carbons. (2005)

Piscanec, S., Mauri, F., Ferrari, A.C., Lazzeri, M., Robertson, J.

Raman spectroscopy is a standard tool for the characterisation of carbon materials, from graphite to diamond-like carbon and carbon nanotubes. An important factor is the dependence of the Raman...

Electron Transport and Hot Phonons in Carbon Nanotubes (2005)

Lazzeri, M., Piscanec, S., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate the key role of phonon occupation in limiting the high-field ballistic transport in metallic carbon nanotubes. In particular, we provide a simple analytic formula for the electron...

Phonon Linewidths and Electron Phonon Coupling in Nanotubes (2005)

Lazzeri, Michele, Piscanec, S., Mauri, Francesco, Ferrari, A. C., Robertson, J.

We prove that Electron-phonon coupling (EPC) is the major source of broadening for the Raman G and G- peaks in graphite and metallic nanotubes. This allows us to directly measure the optical-phonon...

Electron Transport and Hot Phonons in Carbon Nanotubes (2005)

Lazzeri, M., Piscanec, S., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate the key role of phonon occupation in limiting the high-field ballistic transport in metallic carbon nanotubes. In particular, we provide a simple analytic formula for the electron...

Phonon Linewidths and Electron Phonon Coupling in Nanotubes (2005)

Lazzeri, Michele, Piscanec, S., Mauri, Francesco, Ferrari, A. C., Robertson, J.

We prove that Electron-phonon coupling (EPC) is the major source of broadening for the Raman G and G- peaks in graphite and metallic nanotubes. This allows us to directly measure the optical-phonon...

SHOCK TUBE STUDIES OF FUEL-AIR IGNITION CHARACTERISTICS. (2005)

Skinner, A. D., Skinner, G. B., Robertson, J., Zanders, D. L.

Ignition induction times of hydrogen-air mixtures were measured after the reflected wave in a single-pulse shock tube as a function of mixture ratio, absolute pressure and temperature. The data have...

The ultrasmoothness of diamond-like carbon surfaces (2005)

Moseler, M., Gumbsch, P., Casiraghi, C., Ferrari, A.C., Robertson, J.

The ultrasmoothness of diamond-like carbon coatings is explained by an atomistic/continuum multiscale model. At the atomic scale, carbon ion impacts induce downhill currents in the top layer of a...

Protective diamond-like carbon coatings for future optical storage disks (2005)

Piazza, F., Grambole, D., Schneider, D., Casiraghi, C., Ferrari, A.C., Robertson, J.

Diamond-like carbon (DLC) is a promising protective coating for future optical storage technologies. The requirements place conflicting constraints on the nature of the DLC. It must be transparent at...

Kohn Anomalies and Electron-Phonon Interaction in Graphite (2004)

Piscanec, S., Lazzeri, M., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate that graphite phonon dispersions have two Kohn anomalies at the Gamma-E_2g and K-A'1 modes. The anomalies are revealed by two sharp kinks. By an exact analytic derivation, we show that...

The Resident Choice Scale: A measure to assess opportunities for self-determination in residential settings. (2004)

Hatton, C. R., Emerson, E., Robertson, J., Gregory, N.

Background A 26-item Resident Choice Scale was designed to assess service practices for promoting resident choice. Method The staff working with 560 UK/Irish adults with intellectual disability were...

Kohn Anomalies and Electron-Phonon Interaction in Graphite (2004)

Piscanec, S., Lazzeri, M., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate that graphite phonon dispersions have two Kohn anomalies at the Gamma-E_2g and K-A\'1 modes. The anomalies are revealed by two sharp kinks. By an exact analytic derivation, we show...

Kohn Anomalies and Electron-Phonon Interaction in Graphite (2004)

Piscanec, S., Lazzeri, M., Mauri, F., Ferrari, A. C., Robertson, J.

We demonstrate that graphite phonon dispersions have two Kohn anomalies at the Gamma-E_2g and K-A\'1 modes. The anomalies are revealed by two sharp kinks. By an exact analytic derivation, we show...

Ultra-thin carbon layer for high density magnetic storage devices (2004)

Casiraghi, C., Ferrari, A.C., Robertson, J., Ohr, R., Gradowski, M. Von, Schneider, D., ...

Storage density is presently doubling every year. This requires the read head to approach closer to the magnetic layer, and ever-thinner layers of carbon. Film thickness below 2 nm and roughness well...

The 2001 Superoutburst of WZ Sagittae (2002)

Patterson, J., Masi, G., Richmond, M., Martin, B., Beshore, E., Skillman, D., ...

We report the results of a worldwide campaign to observe WZ Sagittae during its 2001 superoutburst. After a 23-year slumber at V=15.5, the star rose within 2 days to a peak brightness of 8.2, and...

Field Emission Site Densities of Nanostructured Carbon (2002)

Cui, J. B., Robertson, J., Milne, W. I.

The field emission properties of nanostructured carbon films deposited by cathodic vacuum arc in a He atmosphere have been studied by measuring the emission currents and the emission site density....

X-Ray Reflectivity of Ultra-Thin Diamond-Like Carbon Films (2002)

Tanner, B. K., LiBassi, A., Ferrari, A. C., Robertson, J.

Grazing incidence x-ray reflectivity has been employed to investigate ultra-thin films of tetrahedral amorphous carbon (ta-C) grown with an S-bend filtered cathodic vacuum arc. The results indicate...

Factors associated with expressed satisfaction among people with intellectual disability receiving residential supports. (2001)

Gregory, N., Robertson, J., Kessissoglou, S., Emerson, Eric, Hatton, Chris

The aim of the present study was to identify factors associated with variations in the levels of expressed satisfaction among adults with intellectual disability (ID) receiving residential supports....

Carbon films for use as the electron source in a parallel e-Beam lithography system (NDFCT 353) (2001)

Milne, W.I., Teo, K.B.K., Chhowalla, M., Amaratunga, G.A., Yuan, J., Robertson, J., ...

The overall aim of this work is to produce a parallel e-beam lithography system using an array of field-emitting microguns independently driven by an active matrix array. This paper will describe the...

Fabrication and analysis of conductive channels in diamond- like amorphous carbon films (2001)

Yuan, J., Teo, K.B.K., Milne, W.I., Robertson, J., Legagneux, P., Pirio, G., ...

Amorphous carbon films have attracted much interest because their physical properties can be tuned by changing deposition conditions. In many device applications, we need heterostructures composed of...

The treatment and management of challenging behaviours in residential settings. (2000)

Emerson, Eric, Robertson, J., Gregory, N., Hatton, Chris, Kessissoglou, S., Hallam, A., ...

Aspects of the treatment and management of challenging behaviour were investigated among 500 adults with intellectual disabilities receiving various forms of residential supports. The present results...

The preparation, characterization and tribological properties of TA-C : H deposited using an electron cyclotron wave resonance plasma beam source (1999)

Morrison, NA, Muhl, S, Rodil, SE, Ferrari, AC, Milne, WI, Robertson, J, ...

A compact electron cyclotron wave resonance (ECWR) source has been developed for the high rate deposition of hydrogenated tetrahedral amorphous carbon (ta-C:H). The ECWR provides growth rates of up...

The preparation, characterization and tribological properties of TA-C : H deposited using an electron cyclotron wave resonance plasma beam source (1999)

Morrison, NA, Muhl, S, Rodil, SE, Ferrari, AC, Milne, WI, Robertson, J, ...

A compact electron cyclotron wave resonance (ECWR) source has been developed for the high rate deposition of hydrogenated tetrahedral amorphous carbon (ta-C:H). The ECWR provides growth rates of up...

The preparation, characterization and tribological properties of TA-C : H deposited using an electron cyclotron wave resonance plasma beam source (1999)

Morrison, NA, Muhl, S, Rodil, SE, Ferrari, AC, Milne, WI, Robertson, J, ...

A compact electron cyclotron wave resonance (ECWR) source has been developed for the high rate deposition of hydrogenated tetrahedral amorphous carbon (ta-C:H). The ECWR provides growth rates of up...

The Mechanism of High Temperature Aqueous Corrosion of Stainless Steels. (1998)

Robertson, J.

That the corrosion rate of stainless steels in high temperature, de-oxygenated water is controlled by the solid state diffusion of Fe ions along grain boundaries in the oxide layer is shown; a duplex...

Corrosion of Carbon Steels in High Temperature Acid Chloride Solutions. (1998)

Robertson, J., Forrest, J. E.

To form a porous, laminated scale of magnetite carbon steel is corroded in high temperature, aqueous acid chloride solutions with rapid, linear kinetics; measurements of the corrosion rate find it to...

Corrosion of Cr Steels in High Temperature Acid Chloride Solutions. (1998)

Forrest, J. E., Robertson, J.

The corrosion kinetics and oxide microstructure formed by acid chloride solutions at 300 C on Fe-Cr alloys, on the Cr ferritic steels A405, A410, A439, A1018, A4130 and A442 on Alloy 800 have been...

Electron Paramagnetic Resonance Investigation of Charge Trapping Centers in Amorphous Silicon Nitride Films. (1998)

Warren, W. L., Kanicki, J., Robertson, J., Poindexter, E. H., McWhorter, P. J.

We have explored the nature of the silicon dangling-bond center in amorphous hydrogenated silicon nitride (a-SiN(x):H) thin films, and its relationship to the charge trapping centers using electron...

Diamond-Like Carbon. (1998)

Robertson, J.

Diamond-like carbon (DLC) is a dense, partially sp3 bonded form of amorphous carbon prepared by ion beam or plasma deposition and frequently used as a hard coating material. Its sp3 bonding arises...

An Overview of Flexible AC Transmission Systems (1994)

Asare, P., Diez, T., Galli, A., O'Neill-Carillo, E., Robertson, J., Zhao, R.

FACTS or "flexible AC transmission systems" is a term that has been suggested for the use of solid state devices to control bulk power flow in transmission systems. The Electric Power Research...

THEORY OF DOPANT LEVEL DEPTHS IN a-Si (1981)

Robertson, J.

The energies of dopant levels in a-Si and a-Si : H are predicted and related to the dopant's orbital energies and silicon dangling bond energies.

THEORY OF DOPANT LEVEL DEPTHS IN a-Si (1981)

Robertson, J.

The energies of dopant levels in a-Si and a-Si : H are predicted and related to the dopant's orbital energies and silicon dangling bond energies.

THEORY OF DOPANT LEVEL DEPTHS IN a-Si (1981)

Robertson, J.

The energies of dopant levels in a-Si and a-Si : H are predicted and related to the dopant's orbital energies and silicon dangling bond energies.

ANISOTROPY OF Ni2+ AND Ni3+ IONS IN CUBIC SITES (1971)

Pointon, A., Robertson, J., Wetton, G.

Single crystals of nickel ferrite have been prepared containing (a) F-state Ni3+ ions on B-sites, and (b) F-state Ni2+ ions on A-sites. The ground state triplet levels of both these ions are split by...

ANISOTROPY OF Ni2+ AND Ni3+ IONS IN CUBIC SITES (1971)

Pointon, A., Robertson, J., Wetton, G.

Single crystals of nickel ferrite have been prepared containing (a) F-state Ni3+ ions on B-sites, and (b) F-state Ni2+ ions on A-sites. The ground state triplet levels of both these ions are split by...

ANISOTROPY OF Ni2+ AND Ni3+ IONS IN CUBIC SITES (1971)

Pointon, A., Robertson, J., Wetton, G.

Single crystals of nickel ferrite have been prepared containing (a) F-state Ni3+ ions on B-sites, and (b) F-state Ni2+ ions on A-sites. The ground state triplet levels of both these ions are split by...

A European Multicenter Study of Immunoblotting in Serodiagnosis of Lyme Borreliosis

Robertson, J., Guy, E., Andrews, N., Wilske, B., Anda, P., Granström, M., ...

A European multicenter study of immunoblotting for the serodiagnosis of Lyme borreliosis showed considerable variation in results obtained from tests with a panel of 227 serum samples. Six...