S. Goldman, David Wade, A. C. L. Sturge, Jon Ashworth, Len Arrowsmith, Nick Nuttall, Douglas Adams, F. P. Ladd, Humphrey Wolferstan, M. R., Tim Judah and Dessa Trevisan, Simon Barnes, Richard Ford, Home Correspondent, John O'leary Education Correspondent, James T. Ward, Andrew Longmore, Gordon Allan, Ronald Faux, Sarah Jane Checkland, Saleroom Correspondent, Angela MacKay, Ross Tieman, Industrial Correspondent, Philip Howard, Sue Lloyd-Roberts, Hilary Finch, Kilmarnock (Chairman), Sheila Gunn and Tom Walker, D. F. Evans (Civil engineering consultant), Mark Mildred, Debra Isaac, Neil Bennett, Banking Correspondent, Tom Walker, Gillian Reynolds, Tim Judah and Michael Binyon, Diplomatic Editor, Roger Boyes East Europe Correspondent, Jeremy Laurance, Health Services Correspondent, Martin Fletcher, Harold Pinter, Gerald Isaaman, Editor, York Membery, Mitchell Platts, Golf Correspondent, Andrew Longmore Tennis Correspondent, Stewart Tendler Crime Correspondent, Michael Tate, Peter Ball, John St Albans, John Goodbody and Adam Fresco, Roy Anderson, Alfred Hermida and Christopher Walker, Rachel Kelly, Robin Bruce Lockhart, Robert Seely, Shirley Gee, Elizabeth Troop, Ruth Gledhill Religion Correspondent, Douglas Broom, Jeremy Laurance Health Services Correspondent, Ray Kennedy, Robin Young, Sean MacCarthaigh, Simon Brett, Eve-Ann Prentice, Michael Clark, Philip Robinson, Michael Hamlyn, Douglas Broom, Local Government Correspondent, R. T. D. Oliver, Peter Lewis, Conor Cruise O'Brien, Kate Muir, Jonathan Sale, John Phillips and George Brock, Edward Fennell, Michael McCarthy Environment Correspondent, John Woodcock, Janet Daley, Brian Sibley, R. Burt, David Miller, Robin Oakley Political Editor, Geoffrey Wheeler, Matthew D'ancona, Education Reporter, Robin Oakley, Political Editor, David Powell Athletics Correspondent, Lindsay Cook, Money Editor, Stan Barstow, Peter Davalle, Simon Tait Arts Correspondent, Alan Lee, Cricket Correspondent, Raymond Keene, Chess Correspondent, Tom Stoppard, Craig Brown, Frances Gibb, Legal Correspondent, Paul Wilkinson, Alix Ramsay, Davina Lloyd, Richard Evans, Nigel Hawkes, Robin Neillands, David Davis, Craig Seton, Wolfgang Munchau, European Business Correspondent, John Holland, David Pannick QC, Roger Boyes, Alan Bennett, Graham Hills, Keith MacKlin, James Bone and Philip Webster, Winston Fletcher, Jamie Dettmer, Mary Noble, John Goodbody, G. E. Jones, Headmaster, Neil Lyndon, Martin Rosenbaum, Matthew Parris, Fay Weldon, Sheila Gunn Political Correspondent, Michael Seely, Scrivenor, Roy Greenslade, Alan Lee Cricket Correspondent, Richard Beeston, Ben Macintyre, Tony Samstag and David Young, David Sinclair, Martin Waller, Wolfgang Münchau and Ross Tieman, Jill Sherman, Political Correspondent, Patrick O'brien, Richard Morrison, Anatole Kaletsky Economics Editor, Sam Kiley, Arthur Leathley, Vince Wright, Colin Virden, Secretary, Linda Steele, Matthew Bond, David Hands, Rugby Correspondent, Richard Ford, Katharine Austin, Mary Dejevsky, Henry Warson (Chemical Consultant), Michael Horsnell and Sam Kiley, Michael Hornsby Agriculture Correspondent,
... Funeral Arrangements Multiple Classified Advertising Items Legal Notices Xcom Limited Crème de la Crème Word-Watching Forthcoming ...
1992 - Gale Group | TDA
O. Ağar, Z. Y. Khattari, M.I. Sayyed, H.O. Tekın, Shrideh Al‐Omari, Mufeed Maghrabi, Mohd Hafiz Mohd Zaid, I.V. Kityk,
... agreement between the µ/ρ values derived from XCOM and MCNPX code (version 2.6.0). It is found that the mass ...
Tópico(s): Radioactivity and Radon Measurements
2018 - Elsevier BV | Results in Physics
At L. Hof, R Bockel, Tanneke Schoppen, Klaas Postema,
... 1) a less precise foot placement (greater CoP-XcoM margin) results in a wider stride, (2) this effect can be reduced by walking with ...
Tópico(s): Muscle activation and electromyography studies
2006 - Elsevier BV | Gait & Posture
Jamila S. Alzahrani, C. Mutuwong, Canel Eke, Abeer S. Altowyan, I.O. Olarinoye, M.S. Al-Buriahi,
... dopant ion. The photon attenuation coefficient obtained from XCOM calculation and simulations agreed within a 2.90% margin. The μ/ρ varied within the ...
Tópico(s): Nuclear materials and radiation effects
2023 - Elsevier BV | Optik
I. C. Celik, M. Kamislioglu, Nuri Yorulmaz, Mehmet Murat YAŞAR, Mustafa Durgun,
... the globally accepted mass attenuation coefficient database of XCOM using MCNP6.2 simulation results. The proximity between these two is ...
Tópico(s): Radiation Dose and Imaging
2024 - Elsevier BV | Radiation Physics and Chemistry
Ahmed S. Ali, Albandari W. Alrowaily, Shams A.M. Issa, M. Rashad, Reda Elsaman, Hesham M.H. Zakaly,
... radiation shielding features which have been calculated by XCOM program. BSCB/W-00, BSCB/W-2.5, BSCB/W-5.0, BSCB/W-7. ...
Tópico(s): Luminescence Properties of Advanced Materials
2023 - Elsevier BV | Radiation Physics and Chemistry
Amandeep Sharma, M.I. Sayyed, O. Ağar, H.O. Tekın,
... while the difference between the present code and XCOM database is found to be almost 2%. Therefore, the estimated results are in good agreement ...
Tópico(s): Radioactivity and Radon Measurements
2019 - Elsevier BV | Results in Physics
Mohamed Irfan Mohamed Refai, Bert-Jan van Beijnum, Jaap H. Buurke, Petrus H. Veltink,
... and heel, we were able to estimate the XCoM with a mean absolute rms error of 2.2±0.3 cm in the walking direction while walking at a preferred speed, when compared to the AGBS. For the same case, the XCoM was classified as ahead or behind the base ...
Tópico(s): Gait Recognition and Analysis
2018 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Neural Systems and Rehabilitation Engineering
Christopher M. Heirwegh, Irina Pradler, J.L. Campbell,
... 7–9% discrepancy was found when using the XCOM database for the computation, but this was reduced to 2–5% when FFAST coefficients were substituted. Further improvement ... was adopted. This ‘Mixed’ database consisted of primarily XCOM coefficients with FFAST values inserted for the light element ( Z = 11,…, 14) attenuation of photons having energy less than their K edge and for oxygen in the 1–2 keV range. The average efficiency constant discrepancies were ...
Tópico(s): Radiation Shielding Materials Analysis
2015 - Wiley | X-Ray Spectrometry
Ali Al Asadi, Seyed Abolfazl Hosseini,
... the results of simulation using the MCNPX and XCOM database in most cases was less than 2%. Additionally, the Mean Free Path (MFP) and Half- ...
Tópico(s): Radioactivity and Radon Measurements
2021 - Elsevier BV | Radiation Physics and Chemistry
Nuha Al‐Harbi, M.I. Sayyed, Yas Al‒Hadeethi, Ashok Kumar, Mohamed Elsafi, K.A. Mahmoud, Mayeen Uddin Khandaker, D.A. Bradley,
... compared with the NIST photon cross-section database (XCOM) in the energy region between 0.161 and 2.51 MeV. The highest linear attenuation coefficient (LAC) ...
Tópico(s): Advanced X-ray and CT Imaging
2021 - Elsevier BV | Radiation Physics and Chemistry
Shams A.M. Issa, A.M.A. Mostafa, Taha A. Hanafy, Mengge Dong, Xiangxin Xue,
... PVA) mixed with varying degrees of Pb(NO3)2 (0–30 wt%) as reinforced materials were prepared in this paper. The construction and optical properties of samples have been studied using Fourier-transform infrared (FTIR) at 400-4000 cm−1 UV-VIS at 190–900 nm. Gamma-ray shielding properties were analyzed by 133 Ba (0.356 MeV) and 137 Cs (0.662 MeV) gamma ray source, Xcom program and MCNP5 code. The results showed that ...
Tópico(s): Graphite, nuclear technology, radiation studies
2018 - Elsevier BV | Progress in Nuclear Energy
Jamila S. Alzahrani, Ebru Yılmaz, Fatih Çalışkan, Z.A. Alrowaili, I.O. Olarinoye, Mohammed S. Alqahtani, Halil Arslan, M.S. Al-Buriahi,
... from data from FLUKA Monte Carlo simulations and XCOM datasets. The densities of the glasses varied from 2.98 gcm−3 (for G) to 3.18 ...
Tópico(s): X-ray Diffraction in Crystallography
2023 - Elsevier BV | Materials Today Communications
Bülent Aktaş, Abuzer Açıkgöz, Demet Yılmaz, Şerife Pınar Yalçın, K. Dogru, Nuri Yorulmaz,
... very good agreement was achieved between MCNP5 and XCOM. These results showed that the sample containing 0.2 mol % TeO2 was the best photon attenuation ability ...
Tópico(s): Nuclear materials and radiation effects
2022 - Elsevier BV | Journal of Nuclear Materials
Gareth D. Jones, Darren C. James, Michael Thacker, David A. Green,
... peak forward momentum and fluidity during rising; CoP-xCoM separation at seat-off, upright, GI-onset, and steps1-2; and forward BCoM velocity were all significantly greater in STW. In contrast, peak BCoM vertical momentum, flexion-momentum time, and 3rd step stability were consistent between tasks and yielded acceptable reliability.STW is a more challenging task due to the merging of rising with GI reflected by greater CoP-xCoM separation compared to STSW indicative of more positional ...
Tópico(s): Spinal Cord Injury Research
2018 - Public Library of Science | PLoS ONE
Christopher M. Heirwegh, Irina Pradler, J.L. Campbell,
... of the National Institute of Standards and Technology XCOM and FFAST photo-ionization cross-section databases in the low energy region (1–2 keV) for light elements. Characteristic x-ray yields ... This discrepancy was traced to use of the XCOM Hartree–Slater photo-electric cross-sections. Substitution of the FFAST Hartree–Slater cross-sections reduced the effect. This suggests that for 1–2 keV x-rays in light element absorbers, the FFAST predictions of the photo-electric cross-sections are more accurate than the XCOM values.
Tópico(s): Radiation Shielding Materials Analysis
2013 - IOP Publishing | Journal of Physics B Atomic Molecular and Optical Physics
I. Orlić, K.K. Loh, Chorng Haur Sow, S.M. Tang, Patricia S. P. Thong,
... al. in the low photon energy region, and (2) theoretical values generated with the XCOM code for fitting in the high energy region. The root mean square of the fit is generally less than 0.2% except for energies below 1 keV where the ...
Tópico(s): Radiation Shielding Materials Analysis
1993 - Elsevier BV | Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms
Hammam Abdurabu Thabit, Abd Khamim Ismail, M.I. Sayyed, S. Hashim, Ibrahim Abdullahi, Mohamed Elsafi, K. Keshavamurthy, G. Jagannath,
... 05 to 3 MeV and compared to the XCOM software results, with a relative difference of less than 2% between the two results. The increase of WO3 ...
Tópico(s): Glass properties and applications
2023 - Elsevier BV | Nuclear Engineering and Technology
F.I. El‐Agawany, K.A. Mahmoud, Hakan Akyıldırım, El-Sayed Yousef, H.O. Tekın, Y. S. Rammah,
... by utilizing the Geant4 simulation code and the Xcom program. The density of the glasses (ρ glass ) was enhanced from 2.460 to 6.995 g/cm 3 . The ...
Tópico(s): Radiation Dose and Imaging
2021 - | Emerging Materials Research
Shams A.M. Issa, A.M.A. Mostafa, Mengge Dong, Vishwanath P. Singh, H.O. Tekın,
... 0.2% to 2.8% and from 0.2% to 6.98% for MCNP5 and Xcom relative to experimental results, while the Monte Carlo ...
Tópico(s): Radioactivity and Radon Measurements
2018 - Taylor & Francis | Radiation effects and defects in solids
M. Samdani, Beriham Basha, Sultan J. Alsufyani, Imen Kebaïli, K. Chandra Sekhar, Z.A. Alrowaili, Canel Eke, I.O. Olarinoye, M.S. Al-Buriahi,
... values of μ/ρ evaluated with FLUKA and XCOM were within 0.96%. The mass attenuation coefficients of MBBFe-0, MBBFe-1, MBBFe-2, MBBFe-3, and MBBFe-4 ranged from 0. ...
Tópico(s): Graphite, nuclear technology, radiation studies
2023 - Elsevier BV | Radiation Physics and Chemistry
M.S. Al-Buriahi, Halil Arslan, H.O. Tekın, Viswanath P. Singh, Baris T. Tonguc,
... glasses have been calculated using Geant4 toolkit and XCOM program for photon energy range of 1 keV—1000 MeV. The correlation factor (R 2 ) between these two methods was found to be ...
Tópico(s): Graphite, nuclear technology, radiation studies
2020 - IOP Publishing | Materials Research Express
Dalal A. Aloraini, Aljawhara H. Almuqrin, Kawa M. Kaky, M.I. Sayyed, Mohamed Elsafi,
... the free polyester and polyester samples with CeO 2 were experimentally measured compared with the XCOM data. The experimental LAC value was found to ...
Tópico(s): Polymer Nanocomposite Synthesis and Irradiation
2023 - De Gruyter | e-Polymers
Ashok Kumar, Supreet Pal Singh, Y. Elmahroug, Ümit Kara, H.O. Tekın, M.I. Sayyed,
In the present work, MCNPX and Geant4 have been used to calculate the mass attenuation coefficient of 26.66 B2O3–16GeO2–4Bi2O3–(53.33–x) PbO–xPbF2 (x = 0, 15, 30, 40 mol %) glasses at 0.122, 0.356, 0.511, 0.662, 0.84, 1.17, 1.275 and 1.33 MeV photon energies. The obtained results have been compared with the findings of XCOM program and are found to be in good agreement. The obtained values of mass attenuation coefficient have been used to calculate effective atomic number, electron density and mean free ...
Tópico(s): Nuclear materials and radiation effects
2018 - IOP Publishing | Materials Research Express
Ehsan Taghizadeh Tousi, Sabar Bauk, Rokiah Hashim, Mohamad Suhaimi Jaafar, Ali Abuarra, Khalid Saleh Ali Aldroobi, Amer Mahmoud Al-Jarrah,
... compared with theoretically calculated mass attenuations using the XCOM computer program for younger-age (breast 1: 75% muscle+25% fat), middle-age (breast 2: 50% muscle+50% fat), and old-age (breast ...
Tópico(s): Advanced Radiotherapy Techniques
2014 - Elsevier BV | Radiation Physics and Chemistry
Seyed Milad Vahabi, Mostean Bahreinipour, Mojtaba Shamsaie Zafarghandi,
... with available experimental data and predictions from the XCOM program in the gamma ray energies, 59.5, 279.1, 511, 661.6, 662, 1115.5, 1173.2, 1274.5 and 1332.5 keV. Comparison was also made with results obtained by Singh et al. Obtained results were highly in accordance with XCOM data. The results showed that the geometry used ...
Tópico(s): Radioactivity and Radon Measurements
2016 - Elsevier BV | Vacuum
S.A. Bassam, K.A. Naseer, Anagha J. Prakash, K.A. Mahmoud, C.S. SuchandSangeeth, M.I. Sayyed, Mohammed S. Alqahtani, E. El Sheikh, Mayeen Uddin Khandaker,
... MC simulated μm values and the theoretically calculated XCOM μm values. The difference (%) between both of the mentioned results is found in the range of ±2%. At γ ray energy of 0.662 MeV, ...
Tópico(s): Glass properties and applications
2023 - Elsevier BV | Radiation Physics and Chemistry
... the WinXCom code, a Windows version of the XCOM database. The effect of increasing P 2 O 5 concentration on the shielding parameters has ...
Tópico(s): Radiation Dose and Imaging
2019 - European Journal of Science and Technology | European Journal of Science and Technology
M.S. Al-Buriahi, Z.A. Alrowaili, Sultan Alomairy, I.O. Olarinoye, C. Mutuwong,
... Te-BGe3 respectively. The FLUKA Monte Carlo and XCOM code were used to evaluate the photon shielding parameters of the glasses for energies between 0.284 and 2.506 MeV. The optical quantities such as the ...
Tópico(s): Glass properties and applications
2022 - Elsevier BV | Optik
M.I. Sayyed, Z. Y. Khattari, Ashok Kumar, J. Al‐Jundi, Mengge Dong, M.Y. AlZaatreh,
The radiation shielding properties (mass attenuation coefficient, effective atomic number, half value layer, mean free path and exposure buildup factor) of xBaO–20Nb2O5–(80−x)P2O5, (x = 20, 30, 40, 50 and 60 mol%) glass system has been evaluated. The mass attenuation coefficient was calculated at 31, 59.5, 80, 356 and 662 keV photon energies using XCOM program and MCNP5 code. The obtained results are found to be in good agreement. The values of mass attenuation coefficient and effective atomic number ...
Tópico(s): Radiation Dose and Imaging
2018 - IOP Publishing | Materials Research Express