Results 31 to 40 of about 342,443 (227)

Boron Abundances in the Galactic Disk

, 2010
When compared to lithium and beryllium, the absence of boron lines in the optical results in a relatively small data set of boron abundances measured in Galactic stars to date.
Katia Cunha, Kiselman, Lodders, Primas
core   +1 more source

Boron isotope ratio determination in carbonates /via/ LA-MC-ICP-MS using soda-lime glass standards as reference material [PDF]

, 2010
A new in situ method using LA-MC-ICP-MS (193 nm excimer laser) for the determination of stable boron isotope ratios (δ11B) in carbonates was developed.
Aggarwal, Aggarwal, Agnes Heinemann, Anton Eisenhauer, Dickson, Duchateau, Eggins, Fietzke, Fietzke, Florian Böhm, Foster, Foster, Gaillardet, Hemming, Hemming, Hemming, Heumann, Hönisch, Isabelle Taubner, Jan Fietzke, Jonathan Erez, Kakihana, Kasemann, Kasemann, Klochko, Klochko, le Roux, Lécuyer, Pagani, Palmer, Reynaud, Rollion-Bard, Rollion-Bard, Sanyal, Schmitt, Spivack, Spivack, Vengosch, Vengosch, Zeebe   +39 more
core   +1 more source

Geometric and dosimetric evaluation of a commercial AI auto‐contouring tool on multiple anatomical sites in CT scans

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Current radiotherapy practices rely on manual contouring of CT scans, which is time‐consuming, prone to variability, and requires highly trained experts. There is a need for more efficient and consistent contouring methods. This study evaluated the performance of the Varian Ethos AI auto‐contouring tool to assess its potential integration into
Robert N. Finnegan, Alexandra Quinn, Patrick Horsley, Joseph Chan, Maegan Stewart, Regina Bromley, Jeremy Booth   +6 more
wiley   +1 more source

Evaluation of the system accuracy of frameless stereotactic radiosurgery using a combination of cone beam CT, six degrees of freedom couch, and surface image‐guided systems

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study aims to evaluate the accuracy of the frameless linear accelerator‐based stereotactic radiosurgery (FSRS) system incorporating cone‐beam CT (CBCT), six degrees of freedom (6‐DoF) couch, room laser, and surface image‐guided (SG) systems.
Hao‐Wen Cheng, Jonathan Li, Sheng‐Hsuan Sun, Guanghua Yan, Chihray Liu   +4 more
wiley   +1 more source

Some effects of boron to the growth and chemical composition of sainfoin (Onobrychis viciaefolia scop.) : a thesis presented in partial fulfilment of the requirmeents for the degree of Master of Agricultural Science in Plant Science at Massey University, Palmerston North, New Zealand [PDF]

, 1982
Some effects of boron on the growth and chemical composition of sainfoin (Onobrychis viciaefolia Scop.) plants cv Fakir were evaluated in a glasshouse.
Juan, Nenita Fabros
core  

Surface dose analysis and dosimetric comparison of Halcyon versus Truebeam in breast cancer radiotherapy: An OSL dosimetry study

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Breast cancer is a neoplastic disease with high prevalence among women. Radiotherapy is one of the principal treatment modalities for this disease, but it poses significant challenges. This study aimed to compare and evaluate the technical and dosimetric performance of conventional C‐arm linac systems and a new design, Halcyon, in the ...
Mustafa Çağlar, Kudret Akçay, Esra Serin, Dursun Eşitmez, Mehmet Sıddık Cebe, Navid Kheradmand, Ömer Yazıcı, Dilek Ünal, Evrim Metcalfe   +8 more
wiley   +1 more source

Open‐source deep‐learning models for segmentation of normal structures for prostatic and gynecological high‐dose‐rate brachytherapy: Comparison of architectures

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background The use of deep learning‐based auto‐contouring algorithms in various treatment planning services is increasingly common. There is a notable deficit of commercially or publicly available models trained on large or diverse datasets containing high‐dose‐rate (HDR) brachytherapy treatment scans, leading to poor performance on images ...
Andrew J. Krupien, Yasin Abdulkadir, Dishane C. Luximon, John Charters, Huiming Dong, Jonathan Pham, Dylan O'Connell, Jack Neylon, James M. Lamb   +8 more
wiley   +1 more source

A New Class of Boron Nanotube

, 2011
The configurations, stability and electronic structures of a new class of boron sheet and related boron nanotubes are predicted within the framework of density functional theory. This boron sheet is sparser than those of recent proposals.
Baughman, Boustani, Boustani, Boustani, Cabria, Chacko, Ciuparu, Gonzalez Szwacki, Grimes, Iijima, Kiran, Kresse, Kresse, Kresse, Kresse, Kroto, Kunstmann, Lau, Lee, Monkhorst, Mukhopadhyay, Perdew, Quandt, Singh, Tang, Vanderbilt, Xu, Yang, Zhai   +28 more
core   +1 more source

Pressure-induced metallization in solid boron [PDF]

, 2001
Different phases of solid boron under high pressure are studied by first principles calculations. The $\alpha$-B$_{12}$ structure is found to be stable up to 270 GPa.
A. Jayaraman, C. Mailhiot, D. Li, D. U. Gubser, D. Vanderbilt, D. W. Bullett, E. D. Jemmis, F. H. Horn, F. P. Bundy, F. Siringo, G. J. Ackland, H. J. Monkhorst, H. Werheit, J. C. Jamieson, J. P. Perdew, J. Wittig, Jian Ping Lu, Jijun Zhao, K. J. Dunn, M. C. Payne, M. Fujimori, M. I. Eremets, M. M. Dacorogna, N. Vast, O. Shimomura, R. J. Nelmes, S. Lee, Y. Wang   +27 more
core   +3 more sources

Improving dose delivery in non‐coplanar cranial SRS: Stereoscopic x‐ray‐guided mitigation of table walkout errors

Journal of Applied Clinical Medical Physics, EarlyView.
Purpose Linear accelerator (LINAC)‐based single‐isocenter multi‐target (SIMT) treatment has streamlined the cranial stereotactic radiosurgery (SRS) workflow. Though efficient, SIMT delivery adds additional challenges that should be considered, including increased sensitivity to rotational errors for off‐isocenter targets.
Yohan A. Walter, Philip F. Durham, Anne N. Hubbard, William E. Burrell, Hsinshun T. Wu   +4 more
wiley   +1 more source