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31,594 results

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Page 1
Alvarez waves in pregnancy: a comprehensive review.
Russo S, Batista A, Esgalhado F, Palma Dos Reis CR, Serrano F, Vassilenko V, Ortigueira M. Russo S, et al. Biophys Rev. 2021 Jul 8;13(4):563-574. doi: 10.1007/s12551-021-00818-5. eCollection 2021 Aug. Biophys Rev. 2021. PMID: 34471439 Free PMC article. Review.
Alvarez waves are local rhythmic contractions of the myometrium with high frequency and low intensity. ...Publications were categorized in three groups: (A) reports about morphology and characterization of Alvarez waves; (B) publications reporting a positive causali …
Alvarez waves are local rhythmic contractions of the myometrium with high frequency and low intensity. ...Publications were categoriz …
Alvarez varifocal X-ray lens.
Dhamgaye V, Laundy D, Khosroabadi H, Moxham T, Baldock S, Fox O, Sawhney K. Dhamgaye V, et al. Nat Commun. 2023 Jul 31;14(1):4582. doi: 10.1038/s41467-023-40347-1. Nat Commun. 2023. PMID: 37524749 Free PMC article.
In the visible regime, a variable focusing power can be achieved by an Alvarez lens which consists of a pair of inline planar refractors with a cubic thickness profile. ...The study presents the first demonstration of an Alvarez X-ray lens which adaptively corrects …
In the visible regime, a variable focusing power can be achieved by an Alvarez lens which consists of a pair of inline planar refract …
Gradient-index Alvarez lenses.
Lippman DH, Schmidt GR, Bentley JL, Moore DT, Akhavan H, Harmon JP, Williams GM. Lippman DH, et al. Appl Opt. 2023 May 1;62(13):3485-3495. doi: 10.1364/AO.487089. Appl Opt. 2023. PMID: 37132850
Gradient-index Alvarez lenses (GALs), a new, to the best of our knowledge, type of freeform optical component, are surveyed in this work for their unique properties in generating variable optical power. GALs display similar behavior to conventional surface Alvarez l …
Gradient-index Alvarez lenses (GALs), a new, to the best of our knowledge, type of freeform optical component, are surveyed in this w …
MEMS-actuated metasurface Alvarez lens.
Han Z, Colburn S, Majumdar A, Böhringer KF. Han Z, et al. Microsyst Nanoeng. 2020 Oct 5;6:79. doi: 10.1038/s41378-020-00190-6. eCollection 2020. Microsyst Nanoeng. 2020. PMID: 34567689 Free PMC article.
In this work, we have adapted the mechanism of an Alvarez lens - a varifocal composite lens in which lateral shifts of two optical elements with cubic phase surfaces give rise to a change in the optical power - to construct a miniature, microelectromechanical system (MEMS) …
In this work, we have adapted the mechanism of an Alvarez lens - a varifocal composite lens in which lateral shifts of two optical el …
[Alvarez's syndrome].
Vostroknutov NV, Gruzdev MP, Sakharov MI, Sablina VG. Vostroknutov NV, et al. Klin Med (Mosk). 1984 Sep;62(9):126-8. Klin Med (Mosk). 1984. PMID: 6238204 Russian. No abstract available.
Diffractive Alvarez lens.
Barton IM, Dixit SN, Summers LJ, Avicola K, Wilhelmsen J. Barton IM, et al. Opt Lett. 2000 Jan 1;25(1):1-3. doi: 10.1364/ol.25.000001. Opt Lett. 2000. PMID: 18059762
A diffractive Alvarez lens is demonstrated that consists of two separate phase plates, each having complementary 16-level surface-relief profiles that contain cubic phase delays. ...
A diffractive Alvarez lens is demonstrated that consists of two separate phase plates, each having complementary 16-level surface-rel …
Metasurface-based varifocal Alvarez lens at microwave frequencies.
Goldhaber-Gordon Z, Tang AD, Corbella Bagot C, Mokim M, Silva SR, Cardin AE, Azad AK, Chen HT. Goldhaber-Gordon Z, et al. Opt Express. 2024 Jan 15;32(2):2058-2066. doi: 10.1364/OE.509837. Opt Express. 2024. PMID: 38297743 Free article.
Here, we demonstrate a microwave varifocal meta-lens based on the Alvarez lens principle, consisting of two mechanically movable tri-layer metasurface phase plates with reversed cubic spatial profiles. ...These advantageous characteristics, along with its simplicity, compa …
Here, we demonstrate a microwave varifocal meta-lens based on the Alvarez lens principle, consisting of two mechanically movable tri- …
An interview with retired Commander (CDR) Everett Alvarez.
Garza JA, Martinez HR, Spencer T. Garza JA, et al. Psychol Serv. 2020 Nov;17(4):381-383. doi: 10.1037/ser0000470. Epub 2020 Aug 27. Psychol Serv. 2020. PMID: 32852995
Mr. Everett Alvarez is a prior Navy pilot and officer who served during the Vietnam War as a Lieutenant Junior Grade (LTJG, O-2). Mr. Alvarez was the first pilot shot down, captured, and held as a prisoner of war (POW) at the Hoa Lo Prison, also known as the "Hanoi …
Mr. Everett Alvarez is a prior Navy pilot and officer who served during the Vietnam War as a Lieutenant Junior Grade (LTJG, O-2). Mr. …
Reply to letter from Alvarez et al.
Ruiz-Aragón J, Gani R, Márquez S, Alvarez P. Ruiz-Aragón J, et al. Hum Vaccin Immunother. 2021 Mar 4;17(3):696-697. doi: 10.1080/21645515.2020.1813485. Epub 2020 Oct 29. Hum Vaccin Immunother. 2021. PMID: 33121349 Free PMC article. No abstract available.
Optical characteristics of Alvarez variable-power spectacles.
Radhakrishnan H, Charman WN. Radhakrishnan H, et al. Ophthalmic Physiol Opt. 2017 May;37(3):284-296. doi: 10.1111/opo.12361. Epub 2017 Feb 17. Ophthalmic Physiol Opt. 2017. PMID: 28211160
PURPOSE: To establish the optical performance of currently available Alvarez variable-power spectacles in relation to their possible utility for ametropes and presbyopes. ...CONCLUSIONS: Within their designed power ranges, optical performance of currently-available Alva …
PURPOSE: To establish the optical performance of currently available Alvarez variable-power spectacles in relation to their possible …
31,594 results
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