Results 41 to 50 of about 72,402 (289)

Feasibility and Safety of High‐Dose Proton Re‐Irradiation in Recurrent Pediatric Central Nervous System Tumors: A Single‐Institution Retrospective Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Pediatric central nervous system (CNS) tumors often recur despite multimodality therapy. Although re‐irradiation (re‐RT) has historically been limited by concerns for severe late toxicities, modern techniques have renewed interest in this approach. Proton therapy provides dosimetric advantages that may enable curative re‐treatment with
Jin‐Ho Song, Jonathan Baron, Carlos Chavez Perez, Sidharth Ramesh, Jane Minturn, Kavita A. Desai, Amish C. Shah, Jean M. Belasco, Kristina A. Cole, Michael J. Fisher, Phillip B. Storm, Peter M. Madsen, Goldie Kurtz, Robert A. Lustig, Christine Hill‐Kayser, Michael J. LaRiviere   +15 more
wiley   +1 more source

Behavior and design implications of web-post shear failure in cellular beams

Results in Engineering
Local failure is a key factor in the collapse of steel structures, particularly in beams with web openings. Cellular beams, featuring regularly spaced circular openings, are especially susceptible to multiple failure modes caused by these perforations ...
Worathep Sae-Long, Sutham Arun, Suchart Limkatanyu, Preeda Chaimahawan, Nattapong Damrongwiriyanupap, Wichaphon Fakkaew, Sangsan Wongchairattana   +6 more
doaj   +1 more source

Beam-Sweeping Design Based on Nearest Users Position and Beam in 5G mmWave Networks

IEEE Access, 2020
The beam sweeping procedure estimates the beamforming directions, or beams, to be used for downlink millimeter-wave cellular transmissions to an incoming user entering the cell.
Stefano Tomasin, Christian Mazzucco, Danilo De Donno, Filippo Cappellaro   +3 more
doaj   +1 more source

Experimental study of composite concrete cellular steel beams

IOP Conference Series: Earth and Environmental Science, 2022
Abstract The main objective of this study is to compare the structural behavior of composite steel– concrete beams using cellular beams with and without steel ring stiffeners placed around the web openings. An IPE140 hot rolled I-section steel beam was used to create four specimens: one without openings (control beam); one without shear ...
Mustafa Kamil Abbas, Hayder Wafi Al_Thabhawee   +1 more
openaire   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Radiation Field Characterization for Cellular Irradiation: Application for Low Energy Beams

Brazilian Journal of Radiation Sciences, 2023
The interaction of radiation with biological tissues may cause some damage. To quantify it, studying cells in vitro is one methodology for analyzing dose deposition in biological tissues because once exposed to radiation, different methods can quantify ...
Rafael Guimarães Malanga, Thatiane Alves Pianoschi, Cassiana Viccari, Henrique Trombini, Franciele Faccio Busatto, Dinara Jaqueline Moura, Mirko Salomon Alva-Sánchez   +6 more
doaj   +2 more sources

Topology optimization of cantilever beams with non-cellular, cellular, and hybrid structures for enhanced mechanical performance

Applications in Engineering Science
Lattice structures are widely utilized in engineering applications due to their numerous advantages, particularly their exceptional design flexibility. Topology optimization serves as a powerful tool to exploit this flexibility by enabling the design of ...
G. Nikaein, M. Haji Mohammadvali, M.H. Sadeghi   +2 more
doaj   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Monte Carlo Modeling of DNA Lesions and Chromosomal Aberrations Induced by Mixed Beams of Alpha Particles and X-Rays

Frontiers in Physics, 2020
Prediction of health risks associated with exposure to mixed beams of high- and low-linear energy transfer ionizing radiation is based on the assumption that the biological effect caused by mixed radiation equals the sum of effects resulting from the ...
Beata Brzozowska, Adrianna Tartas, Andrzej Wojcik, Andrzej Wojcik   +3 more
doaj   +1 more source

A low sidelobe asymmetric beam antenna for high altitude platform communications [PDF]

, 2004
In a communications network served by a high altitude platform, the antenna beams illuminating each cell require minimized sidelobe powers. Asymmetric beams are advantageous so that cell footprints remain circular.
Thornton, J.
core   +1 more source