Results 41 to 50 of about 6,776 (118)
Medical Physics, Volume 52, Issue 6, Page 4894-4909, June 2025.Abstract Background Air‐vented ionization chambers exposed to clinical radiation beams may suffer from recombination during the drift of the charge carriers towards the electrodes. Thus, dosimetry protocols recommend the use of a correction factor, usually denominated saturation factor (ksat$k_{\rm sat}$), to correct the ionization chamber readout for ...
José Paz‐Martín +7 more
wiley +1 more source
Salud Pública de México, 1997 Objective. Recently, a series of reports, based on ecological analyses of routinely collected data, have shown positive associations between measures of particle concentration and daily mortality counts in various cities of the US and Europe.
ISABELLE ROMIEU +1 more
doaj
Medical Physics, Volume 52, Issue 4, Page 2412-2424, April 2025.Abstract Background In proton radiotherapy, the steep dose deposition profile near the end of the proton's track, the Bragg peak, ensures a more conformed deposition of dose to the tumor region when compared with conventional radiotherapy while reducing the probability of normal tissue complications.
Mariana Brás +3 more
wiley +1 more source
Ecological Entomology, Volume 50, Issue 1, Page 201-213, February 2025.Hurricanes create major disturbances to stream ecosystems by producing large floods and removing riparian vegetation. Understanding their impacts is a priority, as hurricane intensity will increase with global climate change. Hurricane disturbance shifts mayfly assemblages from dominance by Leptophlebiidae before to Baetidae after.
Alonso Ramírez +4 more
wiley +1 more source
Flavor in SU(5)$SU(5)$ Finite Grand Unified Models
Fortschritte der Physik, Volume 72, Issue 12, December 2024.Abstract Four SU(5)N=1$SU(5) \nobreakspace N=1$ supersymmetric models which exhibit S3$S_3$ and/or ZN$Z_N$ symmetries are studied, that are finite to two or all loops, and their corresponding mass matrices. The first is an all‐loop finite model based on an S3×Z3×Z2$S_3\times Z_3\times Z_2$ flavor symmetry, which leads to phenomenologically nonviable ...
Luis Odín Estrada Ramos +3 more
wiley +1 more source
Una interesante aproximación histórica al estudio del péndulo compuesto
Momento, 1998 This paper presents a modern adaptation of Mach 's version of the solution given by Huygens to the compound pendulum problem, a ques tion of historical and didactical interest. An intuitivc solution to the problem of finding the period of osciJation of a
C. Camargo, R. Páez
doaj
Global Change Biology, Volume 30, Issue 10, October 2024.Despite the critical role of biological soil crusts (biocrusts) in dryland C and N cycles, little is known about how biocrust‐derived C and N move into the soil. This study reveals how biocrusts facilitate the downward movement of C and N and drive the formation of mineral‐associated organic matter in subcrust soils.
K. Witzgall +12 more
wiley +1 more source
Revista de Filología Alemana, 2011 La modalidad como fenómeno lingüístico es un cajón de sastre que incluye el estudio de las actitudes del hablante. Sin embargo, la primera cuestión básica al tratar la modalidad es determinar su objeto de estudio.
Hang Ferrer Mora
doaj
Necessity entrepreneurship: A journey from unemployment to self‐employment
Global Business and Organizational Excellence, Volume 43, Issue 6, Page 41-58, September/October 2024.Abstract This study provides a comprehensive examination of necessity entrepreneurship, a concept distinct from its counterpart, opportunity entrepreneurship. Necessity entrepreneurship emerges from the compelling need to address economic hardship or unemployment, contrasting with opportunity entrepreneurship, which is driven by the pursuit of new ...
Weng Marc Lim +4 more
wiley +1 more source
Detectores de partículas sobre variedades no Minkowskianas
Momento, 1993 The concepts of particle and vacuum are discussed using differents detector's models and are compared with those that arise from the second quantization method on a non-Minkowskian manifold.
J. M. Tejeiro
doaj