Results 101 to 110 of about 1,095,168 (305)

The Radiation Pattern on an Ultrasonic Focusing Radiator [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1947
A focusing quartz radiator made in the form of a concave-convex lens of constant thickness (and being X-cut on the axis) should radiate spherical sound waves which focus at the center of curvature of the radiator surfaces. Because of wave diffraction, the focus should deviate from infinitely sharp in the same manner as is well known in the optical ...
openaire   +1 more source

Considerations on the Diffraction Limitations to the Spatial Resolution of Optical Transition Radiation [PDF]

open access: yes, 1999
The interest in using optical transition radiation (OTR) in high energy (multiGeV) beam diagnostics has motivated theoretical and experimental investigations on the limitations brought by diffraction on the attainable resolution.
Artru, X.   +3 more
core   +2 more sources

Collective Enhancement and Suppression of Excitation Decay in Optical Lattices

open access: yes, 2009
We calculate radiative lifetimes of collective electronic excitations of atoms in an infinite one dimensional lattice. The translational symmetry along the lattice restricts the photon wave vector component parallel to the lattice to the exciton wave ...
Ritsch, Helmut, Zoubi, Hashem
core   +1 more source

Re‐Awakening Public Attention to the Silent Pandemic of Cancer Among Older Adults in Low‐ and Middle‐Income Countries

open access: yesAging and Cancer, EarlyView.
ABSTRACT As global populations age, cancer is increasingly becoming a leading cause of morbidity and mortality among older adults, particularly in low‐ and middle‐income countries (LMICs). Despite accounting for the majority of new cancer cases and deaths, older individuals remain underrepresented in cancer research, clinical guidelines, and health ...
Ibrahim Bidemi Abdullateef   +2 more
wiley   +1 more source

Comprehensive Analysis of Xiaomi Mi 8 GNSS Antenna Performance

open access: yesSensors
The interest in precise point positioning techniques using smartphones increased with the launch of the world’s first dual-frequency L1/L5 GNSS smartphone, Xiaomi Mi 8.
Mónica Zabala Haro   +3 more
doaj   +1 more source

Location of pattern-disturbing structures in the vicinity of an antenna Final report, Jun. 5, 1963 - Sep. 15, 1966 [PDF]

open access: yes
Location of radiation pattern disturbing structures in vicinity of satellite ...
Dowdle, J. C., Dudgeon, J. E., Mott, H.
core   +1 more source

Long‐Term Follow‐Up of Chemotherapy‐Associated Biological Aging in Women With Early Breast Cancer

open access: yesAging and Cancer, EarlyView.
Women threated with adjuvant chemotherapy for early breast cancer have sustained long‐term increase in p16INK4a,, a robust marker of cell senescence, suggesting a chemotherapy‐associated age acceleration. p16INK4a as well as other biomarkers may identify patients at greatest risk for senescence‐related diseases of aging.
Hyman B. Muss   +12 more
wiley   +1 more source

Radiation Pattern Prediction for Metasurfaces: A Neural Network-Based Approach. [PDF]

open access: yesSensors (Basel), 2021
Taghvaee H   +6 more
europepmc   +1 more source

Shared Genetic Effects and Antagonistic Pleiotropy Between Multiple Sclerosis and Common Cancers

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Epidemiologic studies have reported inconsistent altered cancer risk in individuals with multiple sclerosis (MS). Factors such as immune dysregulation, comorbidities, and disease‐modifying therapies may contribute to this variability.
Asli Buyukkurt   +5 more
wiley   +1 more source

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