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150 results on '"McNulty, J. P."'

1. Following enhanced Sm spin projection in Gd$_x$Sm$_{1-x}$N

Author

Miller, J. D., McNulty, J. F., Ruck, B. J., Khalfioui, M. Al, Vézian, S., Suzuki, M., Osawa, H., Kawamura, N., and Trodahl, H. J.

Subjects
Condensed Matter - Materials Science
Abstract

The rare-earth nitrides form a series of structurally simple $intrinsic$ ferromagnetic semiconductors, a rare class of both fundamental interest and application potential. Within the series there is a wide range of magnetic properties relating to the spin/orbit contributions to the ferromagnetic ground states. We report an x-ray magnetic circular dichroism investigation of the spin/orbit magnetic dipole alignments of Sm and Gd ions in epitaxial Gd$_x$Sm$_{1-x}$N films. The Sm spin-alignment expectation value $\langle S_{z} \rangle$ is seen to be strengthened by the Gd/Sm exchange interaction, providing guidance concerning the composition for an angular momentum compensation point (where the volume-averaged total angular momentum of a film is zero)., Comment: 7 Pages, 7 Figures. Submitted to Phys. Rev. B

Published
2022
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2. On the ferromagnetic ground state of SmN

Author

McNulty, J. F., Ruck, B. J., and Trodahl, H. J.

Subjects
Condensed Matter - Materials Science
Abstract

SmN is a ferromagnetic semiconductor with the unusual property of an orbital-dominant magnetic moment that is largely cancelled by an antiparallel spin contribution, resulting in a near-zero net moment. However, there is a basic gap in the understanding of the ferromagnetic ground state, with existing density functional theory calculations providing values of the $4f$ magnetic moments at odds with experimental data. To clarify the situation, we employ an effective $4f$ Hamiltonian incorporating spin-orbit coupling, exchange, the crystal field, and $J$-mixing to calculate the ground state $4f$ moments. Our results are in excellent agreement with experimental data, revealing moderate quenching of both spin and orbital moments to magnitudes of $\sim 2~\mu_B$ in bulk SmN, enhanced to an average of $\sim 3~\mu_B$ in SmN layers within a SmN/GdN superlattice. These calculations provide insight into recent studies of SmN showing that it is an unconventional superconductor at low temperatures and displays twisted magnetization phases in magnetic heterostructures.

Published
2015
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3. Twisted phase of the orbital-dominant ferromagnet SmN in a GdN/SmN heterostructure

Author

McNulty, J. F., Anton, E. -M., Ruck, B. J., Natali, F., Warring, H., Wilhelm, F., Rogalev, A., Soares, M. Medeiros, Brookes, N. B., and Trodahl, H. J.

Subjects
Condensed Matter - Materials Science
Abstract

The strong spin-orbit interaction in the rare-earth elements ensures that even within a ferromagnetic state there is a substantial orbital contribution to the ferromagnetic moment, in contrast to more familiar transition metal systems, where the orbital moment is usually quenched. The orbital-dominant magnetization that is then possible within rare-earth systems facilitates the fabrication of entirely new magnetic heterostructures, and here we report a study of a particularly striking example comprising interfaces between GdN and SmN. Our investigation reveals a twisted magnetization arising from the large spin-only magnetic moment in GdN and the nearly zero, but orbital-dominant, moment of SmN. The unusual twisted phase is driven by (i) the similar ferromag- netic Gd-Gd, Sm-Sm and Gd-Sm exchange interactions, (ii) a SmN Zeeman interaction 200 times weaker than that of GdN, and (iii) the orbital-dominant SmN magnetic moment. The element specificity of X-ray magnetic circular dichroism (XMCD) is used in seperate modes probing both bulk and surface regions, revealing the depth profile of the twisting magnetization., Comment: 15 pages, 4 figures, supplementary material

Published
2015
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4. Strain dependence of bonding and hybridization across the metal-insulator transition of VO2

Author

Laverock, J., Piper, L. F. J., Preston, A. R. H., Chen, B., McNulty, J., Smith, K. E., Kittiwatanakul, S., Lu, J. W., Wolf, S. A., Glans, P. -A., and Guo, J. -H.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

Soft x-ray spectroscopy is used to investigate the strain dependence of the metal-insulator transition of VO2. Changes in the strength of the V 3d - O 2p hybridization are observed across the transition, and are linked to the structural distortion. Furthermore, although the V-V dimerization is well-described by dynamical mean-field theory, the V-O hybridization is found to have an unexpectedly strong dependence on strain that is not predicted by band theory, emphasizing the relevance of the O ion to the physics of VO2.

Published
2012
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11. Research ethics training, challenges, and suggested improvements across Europe: Radiography research ethics standards for Europe (RRESFE).

Author

Bockhold, S., McNulty, J., Abdurakman, E., Bezzina, P., Drey, N., England, A., Flinton, D., Khine, R., McEntee, M., Mekiš, N., Precht, H., Rainford, L., Sá dos Reis, C., Santos, A., Syrgiamiotis, V., Willis, S., Woodley, J., Beardmore, C., Harris, R., and O'Regan, T.

Abstract

The Radiography Research Ethics Standards for Europe (RRESFE) project aimed to provide a cross-sectional view of the current state of radiography research ethics across Europe. This included investigating education and training in research ethics, and identifying the key challenges and potential improvements associated with using existing research ethics frameworks. This cross-sectional online survey targeting radiography researchers in Europe was conducted between April 26 and July 12, 2021. Descriptive and analytical statistics were used to identify research ethics education and training trends. Content analysis of qualitative responses was employed to identify significant challenges and proposed improvements in research ethics frameworks of practice. There were 232 responses received across 33 European countries. Most (n = 132; 57%) respondents had received some research ethics training; however, fewer participants had received training on safeguarding vulnerable patients (n = 72; 38%), diversity and inclusivity (n = 62; 33%), or research with healthy volunteers (n = 60; 32%). Training was associated with a greater perceived importance of the need for research ethics review (p = 0.031) and with the establishment of EQF Level 6 training (p = 0.038). The proportion of formally trained researchers also varied by region (p = <0.001). Time-to-ethics-approval was noted as the biggest challenge for professionals making research ethics applications. Early and universal integration of research-oriented teaching within the radiography education framework which emphasises research ethics is recommended. Additionally, study findings suggest research ethics committee application and approval processes could be further simplified and streamlined. The survey contributes to a growing body of knowledge surrounding the importance of education and training in research ethics for assuring a high standard of research outputs in Radiography and has identified hurdles to obtaining research ethics approval for further investigation and address. [ABSTRACT FROM AUTHOR]

Published
2022
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12. Research ethics systems, processes, and awareness across Europe: Radiography research ethics standards for Europe (RRESFE).

Author

Bockhold, S., McNulty, J., Abdurakman, E., Bezzina, P., Drey, N., England, A., Flinton, D., Khine, R., McEntee, M., Mekiš, N., Precht, H., Rainford, L., Sá dos Reis, C., Santos, A., Syrgiamiotis, V., Willis, S., Woodley, J., Beardmore, C., Harris, R., and O'Regan, T.

Abstract

The Radiography Research Ethics Standards for Europe (RRESFE) project aims to provide a cross-sectional snapshot of current research ethics systems, processes, and awareness of such, across Europe together with identifying the associated challenges, education, and training needs. A cross-sectional online survey targeting radiography researchers in Europe was conducted. Data collection took place between April 26 and July 12, 2021, using a snowball sampling approach. Descriptive and analytical statistics were used to identify trends in research ethics frameworks across Europe. 285 responses were received across 33 European and 23 non-European countries. Most (n = 221; 95%) European respondents stated ethics approval is required before commencing research in their country. Requirements around research ethics approval and awareness of such requirements varied by European region (X2 (2, n = 129) = 7.234, p = 0.013) and were found to differ depending on the type of research participant and study design. Additionally, European respondents reported ethics approval is a national requirement more often than their non-European counterparts (X2 (1, n = 282) = 4.316, p = 0.049). Requirements for ethics approval were also associated with the undergraduate programme duration (2-year vs. 3-year vs. 3.5 year vs. 4-year vs. multiple programme durations; X2 (4, n = 231) = 10.075, p = 0.016) and availability of postgraduate training (postgraduate training available vs. postgraduate training not available; X2 (1, n = 231) = 15.448, p = <0.001) within respondents' country. Respondents from countries with longer programme durations/availability of multiple programme lengths, availability of postgraduate training, and establishment of European Qualifications Framework Level 6 were generally associated with less uncertainty and more comprehensive research ethics requirements. Results are informative of the current status of research ethics within evidence-based radiography. [ABSTRACT FROM AUTHOR]

Published
2022
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15. EFFECTS OF CONE-BEAM COMPUTED TOMOGRAPHY IMAGING GUIDANCE ON PATIENT RADIATION EXPOSURES IN TRANS-ARTERIAL CHEMOEMBOLISATION FOR HEPATOCELLULAR CARCINOMA.

Author

Wong, S Y, Foley, S, Cantwell, C P, Ryan, R, Lucey, J, Maher, P, and McNulty, J P

Subjects
RADIATION exposure, HEPATOCELLULAR carcinoma, CONE beam computed tomography
Abstract

This study investigated the effects of cone-beam computed tomography (CBCT) guidance in trans-arterial chemoembolisation (TACE) procedures on the number of digital subtraction angiography (DSA) runs acquired and total patient radiation exposure in patients with hepatocellular carcinoma (HCC). A retrospective, analytical cross-sectional, single institution, study was conducted. Dose data were compared across the control (DSA guidance alone) and study (DSA and CBCT guidance) groups. A total of 122 procedures were included within the study. There was a significant reduction in the number of DSA runs (3 vs 5, p < 0.001) and DSA air kerma-area product (PKA) (3077.3 vs 4276.6 μGym2, p = 0.042) for the study group when compared to the control group. Total procedural PKA and total procedural reference air kerma (Ka,r) were shown to be 50 and 73% higher, respectively, for the study group when compared to the control group. CBCT imaging guidance does reduce the number of DSA runs and DSA PKA required to complete the TACE procedure for patients diagnosed with HCC; however, a substantial increase in total procedural PKA is to be expected and it is thus important that this increased dose is carefully considered and justified. [ABSTRACT FROM AUTHOR]

Published
2022
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19. Irish Society of Gastroenterology: Proceedings for summer meeting – 26th/27th May 1995 in Galway

Author

Woods, M., O’Donnell, L. J. D., Battistini, B., Warner, T., Vane, J., Fartming, M. G., Yaqoob, J., Wu, J. J., Norris, L. A., Khan, M. I., Keeling, P. W. N., Maguire, D., O’Sullivan, G., Harvey, B., Curran, B., Xin∘, Y., Kay, E. W., Leader, M., Henry, K., Crosbie, O., Norris, S., Costello, P., O’Farrelly, C., Hegarty, J., Kennedy, B., Duggan, M., Plant, R., Kenny-Walsh, E. K., Cotter, P., Whelton, M. J., Yaqoob, J., Khan, M. I., Maloney, M., Noonan, N., Keeling, P. W. N., Buckley, M., Hamilton, H., Beattie, S., O’Morain, C., McNamara, B., Cuffe, J., O’Sullivan, G., Harvey, B., Barry, R. A., O’Morain, C., Collins, D. A., O’Sullivan, G. C., Collins, J. K., Shanahan, F., Skelly, M. M., Mulcahy, H. E., Troy, A., Connell, T., Duggan, C., Duffyt, M. J., Sheahan, K., O’Donoghue, D. P., Buckley, M., Xia, H. X., Hyde, D., O’Morain, C., O’Brien, M. G., Fitzgerald, E. F., Lee, G., Shanahan, F., O’Sullivan, G. C., Hussey, A. J., Boyle, T. J., Garrihy, B., Clinton, O. P., McAnena, O. J., Cuffe, J., McNamara, B., O’Sulllvan, G., Harvey, B., Corby, H., Donnelly, V., O’Herlihy, C., O’Connell, P. R., Deignan, T., Kelly, J., O’Farrelly, C., Breslin, N. P., MacDonnell, C., O’Morain, C., O’Keeffe, J., Mills, K., Srinivasan, U., Willoughby, R., Feighery, C., Twohig, B., Gaynor, K., O’Regan, P. F., Duggan, S., Redmond, H. P., McCarthy, J., Bouchier-Hayes, D., Ma, Q. Y., Williamson, K. E., Rowlands, B. J., Tobin, A., Pilkington, R., O’Donnell, M., O’Shea, E., Conroy, A., Kaminski, G., Walsh, A., Temperley, I. J., Kelleher, D., Weir, D. G., Barry, M. K., Mulligan, E. D., Stokes, M. A., O’Riordain, M. G., Gorey, T. F., McGeeney, K. F., Fitzpatrick, J. M., Watson, R. W. G., Redmond, H. P., Wang, J. H., Campbell, F., Bouchier-Hayes, D., Bennett, D., Kavanagh, E., Gorman, P. O., Twohig, B., O’Regan, P., Shanahan, F., Yassin, M. M. I., McCaigue, M., Parks, T. G., Rowlands, B. J., D’Sa, A. A. B. Barros, Norris, S., Lawlor, M., McElwaine, S., O’Farrelly, C., Hegarty, J., Heneghan, M. A., Kerins, M., Goulding, J., Egan, E. L., Stevens, F. M., McCarthy, C. F., Quirke, M., Eustace-Ryan, A. M., O’Regan, P. F., Khan, M. I., Yaqoob, J., Qureshi, S., Aziz, E., Maree, A., Collins, S., Browne, T., Ahmed, S., Sullibhan, B. O., Smith, P., Walker, F., O’Connor, F., Sweeney, E., O’Morain, C., Farrell, R. J., Morrint, M., Goggins, M., McNulty, J. G., Weir, D. G., Kelleher, D., and Keeling, P. W. N.

Published
1995
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20. Irish Society of Gastroenterology: Proceedings of Poster Section of meeting held in Cork, June 3rd/4th 1994

Author

Taylor, C. T., Baird, A. W., Walsh, E. J., Moran, A. P., Maguire, D., O’Sullivan, G., Harvey, B., O’Sullivan, M. J., Mulcahy, T., Suilleabhain, C. B. O., Doyle, C. T., McCarthy, T. V., Kirwan, W. O., Duffy, M., Regan, M. C., Harrington, M. G., O’Connell, P. R., Carroll, T., Stokes, M. A., Morris, S., Fitzpatrick, J. M., Gorey, T. F., Bennett, M. A., Kay, E. W., Curran, B., Mulcahy, H., O’Donoghue, D. P., Leader, M., Crake, D. T., McDougall, N. I., Johnston, B. T., Kee, F., Collins, J. S. A., McFarland, R. J., Watson, R. G. P., Love, A. H. G., Madhavan, P., Khan, F., Golden, B., Murphy, E., Couse, N., Burke, G., Delaney, P. V., Buckley, M., O’Shea, J., English, L., O’Morain, C., Goggins, M. G., O’Reilly, M., Bergin, C., Kennedy, M., Mulcahy, F., Codd, N. M., Weir, D. G., Kennedy, N. P., McGrath, S., Long, A., Murphy, A., Kelleher, D., Khan, M. I., Cherukuri, A., Farrell, R. J., Carey, C., Kanduru, C., Noonan, N., Quinn, P., Keeling, P. W. N., Fan, X. J., Fan, X. G., Khan, I., Cherukuri, A. K., Farrell, K. J., Maloney, M., McDonald, G. S. A., McNulty, J. G., Watson, R. W. G., Redmond, H. P., Wang, J. H., Bouchier-Hayes, D., Sharifi, Y., Courtney, M. G., Fielding, J. F., O’Farrell, B. J., Rajan, E., Al-Bloushi, S., Shattock, A. G., O’Donovan, D., Browne, A. S., Osborne, D. H., Albloushi, S., O’Reilly, F. M., Royston, D., Skelly, M. M., Keely, S. J., McGrath, J. P., Quinn, A., Byrne, P. J., Walsh, T. N., Hennessy, T. P. J., Ryan, E., Kitching, A., Mulligan, E., MacMathuna, P., Merriman, R., Kelly, P., Dervan, P., Codd, M. B., Gorey, T., Lennon, J., Crowe, J., Prabhakar, M. C., Kieran, N., Reid, S., Neary, P., Horgan, P., Hyland, J., Deignan, T., Kelly, J., O’Farrelly, C., McKee, G. J., Primrose, W. J., Tham, T. C. K., Ellis, P. K., Mcllrath, E. M., Holloway, H., Mullins, W., Gahan, C. G. M., Collins, J. K., Egan, D. A., O’Farrell, A., O’Reilly, C., Ryan, M. P., Thornton, G., O’Sullivan, G. C., O’Gorman, P., Shanahan, F., Sullivan, G. O., O’Brien, F., Murphy, K., Morgan, J., Madden, M., Lee, G., Fitzgerald, E., Abuzakouk, M., Feighery, C., Jones, E., O’Briain, S., Goggins, M., Casey, E., Farrelly, C. O., Lynch, S., and O’Donoghue, D.

Published
1994
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22. Irish Society of Gastroenterology: Proceedings of meeting held November 1990

Author

Coleman, J., Hayes, D. Bouchier, Daw, M. A., O’More, R., Keane, C. T., O’Morain, C., Johnson G. W., Spencer E. F. A., Wilkinson A. J., Kennedy T. L., Collins, J. S. A., Bamford, K. B., Collins, B. J., Sloan, J. M., Moorehead, R. J., Love, A. H. G., McCarthy, C., Collins, R., Beattie, S., McDevitt, J., Feighery, C., O’Farrelly, C., Weir, D. G., Kelleher, D., Whelan, A., Williams, Y., Kellegher, D., Weir, D., Prabhakar, M. C., Daw, M., Keane, F., McDermott E. W. M., Duduric B., Brennan M. F., Gaffney, R., O’Leary, J., Doyle, T., Gaffney, A., Gough, D. B., Fearon, K. C. H., Winstanley, P., Carter, D. C., McAnena, O. J., Moore, F. A., Moore, E. E., Pogetti, R., Peterson, V. M., Abemathy, C. M., Parsons, P., Williams, N. N., Daly, J. M., Herlyn, M., Bouchier-Hayes, D., Course, N. F., Horgan, P. G., Fahy, A., Delaney, C., Fitzpatrick, J. M., Gorey, T. F., Jazrawl S., Walsh T. N., Byrne P. J., Lawlor P., Hennessy T. P. J., O’Sullivan, K. R., Mathias, P. M., McNicholas, M., Logan, M., Masterson, J., Gillen, P., Hyland, J., Beausang, E., Joyce, W. P., Williams, N., Maxwell, W., Reid, I., Sharpe, I., Geraghty, J. G., Tanner, W. A., Patchett, S., Mulcahy, H., Afdhal, N., O’Donoghue, D., Lohan, A., Darzi, A., Keane, F. B. V., Keeling, P. W. N., Gibney, R. C., Keane, R., Drumm, J., Egan, T. J., Delaney, P. V., O’Sullivan, G., Harte, P., Grace, P. A., Qureshi, A., Osbome, H., Bouchier-Hayes, D. J., Bamford, S. L., Geraghty, J., Keane, F. B., Coleman, J. E., Gleeson, A., Mealy, K., Barry, M., Traynor, O., Keating, J. J., Chua, A., Ah-Kion, S., McNulty, J., Heaney, L. G., Murphy, P., Connolly, J. H., Callender, M. E., MacMathuna, P., Farrant, M., Hourihane, D. O. B., Donaldson, P., Lombard, M., Westaby, D., Weir, D. G., Williams, Roger, Couse, N. F., Burke, J., Lennon, G., Delaneyc, C. P., O’Brien, S., O’Brien, A., Fitzgerald, M. X., Hegarty, J. E., Noonan, N., Healy, M., O’Moore, R., Corrigan, O. I., Keating, P. W. N., Li, H. U. I., Byrne, P. J., Lawlor, P., Stuart, R. C., Jazrawi, S., Walsh, T. N., Hennessy, T. P. J., Course, N. F., Wai, D., Jaeger, H., Jackson, A. M., Mitchell, C. J., MacFie, J., Delaney, C. P., McGeeney, K., Caldwell, M. T. P., O’Donoghue, D. P., Connolly J., Stuart R. C., Kay E., Gorey T., Keane R., McKiernan, P., Glasgow, J. F. T., Johnson, B. T., Ferguson, R., Davidson, I., Hurley, J., Keeling, P., Crowley, T., Long, A. A., O’Brien, D. P., Waldron, R. P., Shearer, M. J., Given, H. F., McEntee, G., Monson, J., Donohue, J., Nagomey, D., Trimble, K. C., Molloy, A. M., Scott, J. M., Kay, E., McKeever, J., and Hennessey, T. P. J.

Published
1993
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25. Irish society of gastroenterology: Proceedings of Spring Meeting, University College, Galway on Friday 9th and Saturday 10th June, 1989.

Author

Fitzgerald, E. J., Chua, A., Clabby, C., Keeling, P. W. N., Gilvarry, J. M., Keeling, F., Fitzgerald, O., Fielding, J. F., Mathai, Elizabeth, O’Riordan, T., Tobin, A., Beattie, S., Cafferkey, M., Keane, C. T., O’Morain, C., O’Dwyer, P. J., Hassan, A., Murphy, J. J., Higgins, N. J., Kelly, D., McEntee, G. P., McGeeney, K. F., Fitzpatrick, J. M., Halpin, D. P., O’Byme, P. M., McEntee, G., Hermessy, T. P., Stephens, R. B., Hurley, J. P., Keeling, P., Hurley, J. P., Keeling, P., O’Brien, S., Keoghan, M., Afdhal, N., Hegarty, J. E., Burke, P., Sharp, M., Traynor, O., Molloy, R. G., O’Riordan, M. G., Gillen, P., Kirwan, W. O., Mathai, E., Beattie, S., Cafferkey, M., Keane, T., O’Morain, C., Byrne, P. T., Stuart, R., Lawlor, P., O’Sullivan, G., Hennessy, T. P. J., Burke, P., Hourihane, J., Stephens, R., Mullan, F. J., Campbell, G. R., Rowlands, J., McKelvey, S. T. D., Mullan, F. I., Wilson, H. K., Majury, W., Mills, J., Cromie, A. J., McKelvey, S. T. D., Kerin, M. J., O’Farrell, D., Waldron, R. P., Johnson, J. G., Trimble, K. C., Nunes, D. P., Courtney, M. G., Pomeroy, L., Shattock, A. G., Mulcahy, F. M., Weir, D. G., Chua, A., Ah-Kion, S., Noonan, N., Murphy, J., Weir, D. G., McNulty, J., O’Brien, S., Keoghan, M., Casey, M., Fitzgerald, M. X., Hegarty, J. E., Waldon, B., Cullen, P. T., Hopwood, D., Sutton, D., Kennedy, N., Campbell, F. C., MacMahon, N., Hogan, B., Murray, J., Doyle, J. S., Courtney, M. G., Deasy, J. M., Carr, J., Bouchier-Hayes, C., Cleary, A. P., Walsh, T. N., Gawley, W. F., O’Byrne, P. M., Gleeson, M. I., Calthorpe, D. T., Lane, B. E., Walsh, T. N., Heffernan, S. J., Sanfey, H., Steer, J., Cottell, D., Steer, M., Traynor, O., McEntee, G. P., Stuart, R., Gorey, T. F., Nolan, N., Byme, P., Lawlor, P., Hennessy, T. P. J., Gorey, T. F., Stewart, R., Gillen, P., Nolan, E., Jones, E., McEntee, G., Hennessy, T. P. J., MacMahon, M., Brennan, P., Carmody, E., Nizar, D., Walsh, T. N., Osbome, H., Courtney, M. G., O’Dwyer, R. L., Stevens, F., McCarthy, F., Deasy, J. M., Clery, A. P., Bouchier-Hayes, D., Crerand, S., Feeley, T. M., Waldron, R., Corrigan, T., Hederman, W., O’Cormell, F., Heffernan, S. J., Hurley, J. P., and Keeling, P.

Published
1991
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26. Irish society of gastroenterlogy: Proceedings of Winter Meeting, Belfast City Hospital, Friday 24th and Saturday 25th November, 1989

Author

Watson, R. G. P., Bhatt, B. M., Porter, K. G., Doherty, C., McCaughey, C., Wilson, T. S., Hughes, D. F., Biggart, J. D., Little, C. L., Corbett-Feeney, G. C., Little, M. P. G., McCarthy, C. F., Kavanagh, G., Kee, S., McNulty, J., Fielding, J. F., Huang, J., Smyth, C., Arbuthnott, J. P., Kennedy, N. P., Chua, A., Keeling, P. W. N., Lappin, J., Gillen, P., Burke, P., Hyland, J., Hill, A. D., O’Donoghue, D. P., McGrath, S. J., Buchanan, K. D., Johnston, C. F., Barry, K., Waldron, D. J., Horgan, P. G., McGuire, M., Given, H. F., Bamford, K. B., Collins, J. S. A., Hughes, D. F., Porter, K. G., Wilson., T. S., Patchett, S., O’Riordan, T., Leen, E., Keane, C., O’Morain, C., Gilroy, D. G., Mackle, E. J., Spence, R. A. J., Johnson, G. W., O’Sullivan, K. R., Mathias, P. M., Tobin, A., O’Morain, C. A., Carson, M. E., Stevens, F. M., Bourke, M., Kearns, M., Gannon, F., McCarthy, C. F., Patchett, S., O’Donoghue., D. P., Chua, A., Ah-Kion, S., O’Driscoll, M., Kennedy, N. P., Lee, E., Bolger, C., Kelleher, P., McDonald, M., Byrne, P. J., Gorey, T., Hennessy, T. P., Casey, E. B., MacMahon, M., Hogan, B., O’Sullivan, M., Courtney, M. G., Doyle, J. S., Burke, P., Lappin, J., Hyland, J., Chua, A., Ah-Kion, S., Hamilton, D., Dinan, T., Keeling, P. W. N., Stevens, Fiona M., Nugent, D., Fottrell, P. F., Templeton, J. L., Madden, M., Elliot, M., Chua, A., Kion, A. Ah, Keeling, P. W. N., Yatham, L. N., Barry, S., Dinan, T., Boyle, T., Burke, P., Hyland, J., Kavanagh, G., Veale, D. J., Fitzgerald, O., Fielding, J. F., McDonald, G. S. A., Courtney, M. G., McCann, S. R., Keeling, P. W. N., Weir, D. G., Horgan, P. G., Saleh, H., Waldron, D., Barry, K., McGuire, M., and Given, H. F.

Published
1990
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27. Are radiographers an influencing factor in the radiation protection practices of speech-language therapists performing videofluoroscopic swallowing studies?

Author

Parsotam, H., Warren-Forward, H., Shields, M., McNulty, J., Shaw Bonilha, H., O'Toole, C., Mathisen, B., Unicomb, R., Hearne, A., and Pownall, S.

Abstract

A videofluoroscopic swallowing study (VFSS) is a fluoroscopic examination conducted by radiographers and speech-language therapists (SLTs) to assess dysphagia. Given the potential of SLTs to feed patients during the procedure, they may be exposed to radiation. The research aimed to assess radiation protection practices utilised by SLTs to determine if radiographers have a role in providing ongoing practical education. An online questionnaire was distributed to SLTs from six countries (Australia, Canada, Ireland, New Zealand, United Kingdom and United States of America). Responses were analysed quantitatively using frequencies and chi-square analysis (p = 0.05) and supported by written comments. A total of 224 responses were analysed. Thyroid shields (94%) were used more frequently than full aprons (72%). Differences (p < 0.0001) were seen between Australian and USA participants regarding the use and position of radiation monitors; 43% of Australian participants stating they always used a monitor, compared to 75% of USA participants. Nearly all Australian SLTs wore monitors under shielding (92%) and at waist level (69%), while USA participants reported wearing them outside shielding (97%) and at thyroid level (94%). Participants' radiation practice was influenced primarily by other SLTs (64%), followed by radiographers (57%). However, written comments revealed the significance of the radiographer in providing training as " radiographers are excellent at ensuring we [use] right equipment, stand in the right places and use exposure monitoring ". SLTs did not always adopt the ICRP principle of shielding and there were inconsistencies with regards to the use and placement of radiation monitors. Radiographers are well positioned to provide advice with regards to safe practice. Opportunities to enhance radiation protection practices are evident, as is the advising role of radiographers. [ABSTRACT FROM AUTHOR]

Published
2020
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35. Irish Society of Gastroenterology: Proceedings of Irish Society of Gastroenterology Winter Meeting, Belfast, 23/24 November, 1984.

Author

Hannigan, M. C., Kennedy, S. M., Stevens, F. M., McCarthy, C. F., Little, M. P. G., Murphy, P. D., Gill, R. C., Bowes, K. L., Malone, D. E., McCormick, P. A., Long, A., Jones, B., Bresnihan, B., Moloney, J., O’Donoghue, D. P., Dinsmore, W. W., McMaster, Dorothy, Callerder, M. E., Love, A. H. G., McGowan, P. F., O’Mahony, C., O’Farrelly, C., Mansfield, M., Whelan, C. A., Weir, D. G., Feighery, C. F., Spence, R. A. J., Collins, B. J., Parks, T. G., Crowe, J., Minogue, S., Lowe, H., Jackson, P. T., Glasgow, J. F. T., Carré, I. J., Conway, W., Rich, A. J., Johnston, I. D. A., Keye, G. D., Byrne, P. J., Sheppard, B. L., West, A. B., Hennessy, T. P. J., Fielding, John F., Dolan, C., Kelly, J., Monagan, H., Feighery, C., Brennan, F. N., Majury, C., O’Connor, F. A., Murray, F., Lennon, J. R., Unit, G G, Collins, J. S. A., Trouton, T. G., McFarland, R. J., O’Callaghan, T. W., Morgan, M. A., Duignan, J., Collins, P., Johnson, A., Dickson, B., Ledwith, M., Bouchier-Hayes, D., Bloomfield, F. J., Maxwell, W. J., Walsh, J. P., Hogan, F. P., Kelleher, D., Clayton Love, W., Keeling, P. W. N., Attwood, S. E. A., Mealy, K., Cafferkey, M., Buckley, T., Keane, F. B., Cooper, G. G., Gordon, S. A., Murray, W. R., Quigley, E. M. M., Phillips, S. F., O’Brien, C. J., Vento, S., Eddleston, A. L. W. F., Williams, R., Templeton, John L., McKelvey, S. T. D., Humphreys, W. G., Brown, J. S., Monson, J. R. T., Jones, N. A. G., Vowden, P., Brennan, T. G., Prakash, D., Pearson, F. G., Hegarty, J., Lombard, M., Fitzgerald, R., O’Callagan, T. W., Kernohan, R. M., Gilmartin, D., McNulty, J., Behan, J., Osborne, D. H., Gillan, P., Ryan, W., Leahy, A., Devlin, H. B., Peel, A. L. G., Buchanan, Keith D., O’Hare, Mairead M. T., Sloan, James M., Kennedy, Terence L., Mahapatra, D. N., McKenna, R. M., Kearns, M., Morrison, P., and Kelly, K. A.

Published
1985
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38. Phonon–Glass and Heterogeneous Electrical Transport in A-Site-Deficient SrTiO3

Author

Popuri, S. R., Decourt, R., McNulty, J. A., Pollet, M., Fortes, A. D., Morrison, F. D., Senn, M. S., and Bos, J. W. G.

Abstract

The phonon–glass electron crystal concept is one of the key guiding principles for the development of efficient thermoelectric materials. Here, we confirm that SrTiO3becomes a phonon–glass for large numbers of A-site vacancies in the Sr1–xLa0.67x□0.33xTiO3series and show that its electron crystal properties are stymied by the presence of a core–shell grain structure. Thermal conductivity, heat capacity, and neutron powder diffraction, complemented by representational analysis and phonon calculations, were used to investigate the thermal transport. This reveals that the heat carrying modes are dominated by Sr motions and that these become more localized upon the introduction of the A-site vacancies, consistent with the observed phonon–glass state. Impedance spectroscopy and direct current electrical measurements were used to probe the electrical properties of insulating and conducting samples. This reveals the coring of grains due to oxidation on cooling from sintering temperatures. The resultant insulating shell limits the thermoelectric power factor to S2/ρ = 0.45 mW m–1K–2and the figure-of merit to ZT = 0.15 at 900 K for Sr0.20La0.53□0.27Ti0.95Nb0.05O3−δ. The thermal properties of these materials are, therefore, controlled by an intrinsic feature of the microstructure (i.e., the A-site vacancies), whereas the electrical properties are grain boundary limited, which in principle can be controlled independently to raise S2/ρ and ZT.

Published
2019
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41. Comparison of in vivo vs. frozen vs. Thiel cadaver specimens in visualisation of anatomical structures of the ankle on proton density Magnetic Resonance Imaging (MRI) through a visual grading analysis (VGA) study.

Author

Zarb, F., McNulty, J., Gatt, A., Formosa, C., Chockalingam, N., Evanoff, M.G., and Rainford, L.

Abstract

Purpose The use of cadavers for medical education purposes and for radiology research methodologies which involve subjective image quality evaluation of anatomical criteria is well documented. The aim of this study was to quantify the impact of cadaver tissue preservation in producing MR images that are representative of living tissue by comparing the visualisation of anatomical structures of the ankle obtained from live and cadaver (fresh frozen and Thiel embalmed) specimens through a visual grading analysis (VGA) study. Methods A VGA study was conducted on an image data set consisting of 4 coronal proton density weighted (PDw) sequences obtained from ankles of a live patient and those of a cadaveric specimen, of which the right ankle was frozen and the left Thiel embalmed. Results Comparison of the image quality scores obtained from: the live patient vs. the Thiel specimen indicate a significant difference (p ≤ 0.05) between the scores in favour of the Thiel specimen; between the live patient vs. the frozen specimen indicate a significant difference (p ≤ 0.05) in favour of the frozen specimen and between the frozen vs. the Thiel specimen indicate a significant difference (p ≤ 0.05) in favour of the Thiel specimen. Conclusions The advantages of the use of cadavers (frozen or Thiel embalmed) has been shown to also apply for use with proton density (PD) MR imaging. The preservation of cadavers especially using Thiel is a suitable alternative for MRI optimisation and protocol development purposes. [ABSTRACT FROM AUTHOR]

Published
2017
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46. Assessing progression from mild to severe preeclampsia in expectantly managed preterm parturients.

Author

Johnston, R.C., Stephenson, M.L., Paraghamian, S., Fong, A., Hom, K., Cruz, A., and McNulty, J.

Abstract

Objective: To identify factors associated with shortened latency in expectantly managed women diagnosed with preeclampsia without severe features between 23 0/7 and 35 6/7weeks' gestation.Methods: This was a retrospective cohort study performed at a large community-based hospital between 2009 and 2014, evaluating all mothers between 23 0/7 and 35 6/7weeks' gestation with a diagnosis of preeclampsia without severe features. We collected maternal demographics, symptoms, vital signs and laboratory values within six hours of admission. Maternal and neonatal outcomes were stratified by latency period of less than or greater than/equal to seven days (<7d or ⩾7d).Results: Overall mean latency was 7.6±12.1days. When stratifying subjects to <7d or ⩾7d latency, neither maternal demographics nor gestational age at diagnosis differed between groups. For subjects with ⩾7d latency, pregnancy was prolonged by a mean of 24days compared to the <7d latency group (34 1/7 vs 30 4/7weeks GA, P=0.001). Systolic blood pressure greater than 160mmHg within the first six hours of hospital presentation correlated with a more than 3-fold risk for requiring delivery within seven days of diagnosis (OR 3.26 95% CI 1.40-7.58).Conclusion: Within our cohort of preterm women admitted with preeclampsia without severe features, elevated systolic blood pressure on admission conveyed significant risk for delivery within seven days. [ABSTRACT FROM AUTHOR]

Published
2016
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48. DICOM part 14: GSDF-calibrated medical grade monitor vs a DICOM part 14: GSDF-calibrated "commercial off-the-shelf" (COTS) monitor for viewing 8-bit dental images.

Author

McIlgorm, D. J. and McNulty, J. P.

Subjects
IMAGE quality analysis, DIGITAL image processing, COMPUTER monitors, DICOM (Computer network protocol), DENTAL radiography, VISUAL perception
Abstract

Objectives: To investigate whether there is any difference in the presented image quality between a medical grade monitor and a "commercial off-the-shelf" (COTS) monitor when displaying an 8-bit dental image. Methods: The digital imaging and communications in medicine (DICOM) part 14: greyscale standard display function (GSDF) was verified for both monitors. A visual grading characteristics (VGC) curve was constructed to measure the difference in image quality between the two monitors by comparing radiological structures displayed on each monitor with a DICOM part 14: GSDF-calibrated laptop monitor as reference. Results: All of the monitors conformed to within the American Association of Physicists in Medicine Task Group 18 10% tolerance levels for the assessment of the DICOM part 14: GSDF. There was no difference in the preferred perceived visual sensation for the displayed image between the two tested monitors with the area under the VGC curve = 0.53 and 95% confidence interval = 0.47-0.59. Conclusions: A DICOM part 14: GSDF COTS monitor is capable of displaying an image quality that is equally preferred to a DICOM part 14: GSDF medical grade monitor for an 8-bit image file. [ABSTRACT FROM AUTHOR]

Published
2015
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