Results 11 to 20 of about 240 (106)

Sharp focusing of on-axis superposition of a high-order cylindrical vector beam and a beam with linear polarization

Компьютерная оптика, 2023
In this work, the sharp focusing of a laser beam whose initial polarization pattern is formed by superposition of a cylindrical mth-order vector beam and a homogeneous linearly polarized beam is considered theoretically and numerically.
V.V. Kotlyar, S.S. Stafeev, V.D. Zaitsev
doaj   +1 more source

A spirally rotating backward flow of light [PDF]

Компьютерная оптика, 2018
Using Richards-Wolf formulas, we show that when a left-hand circularly polarized optical vortex with the topological charge 3 is sharply focused in an aplanatic system, a backward near-axis energy flow is observed in the focal plane.
Victor Kotlyar, Anton Nalimov
doaj   +1 more source

Beams with the transverse-only intensity at the focus

Компьютерная оптика
In this work, sharp focusing of vector beams with azimuthal polarization and beams with V-line of polarization uncertainty is simulated numerically using the Richards-Wolf formulas.
S.S. Stafeev, N.N. Kazakov, V.V. Kotlyar
doaj   +1 more source

Helicity of Poincaré beams at the sharp focus

Компьютерная оптика
In this study, helicity of Poincaré beams was considered from the point of view of the Richards-Wolf formalism. It was shown that helicity for Poincaré beams always has radial symmetry and does not depend on the azimuthal angle of the beam.
S.S. Stafeev, V.D. Zaitsev
doaj   +1 more source

Silencing of juvenile hormone‐related genes through RNA interference leads to molt failure and high mortality in the spongy moth

Insect Science, EarlyView.
The feasibility of using RNA interference to control the globally important quarantine pest, the spongy moth. Targeting genes related to JHs play an important role in the growth and development of insects. First, the open reading frames (ORFs) of Ldjhamt and Ldjheh were identified and characterized, and the target genes were cloned and double‐stranded ...
Wenzhuai Ji, Qing Xie, Xiaoxiao Chang, Juan Shi   +3 more
wiley   +1 more source

Experiences and Views of African Australian Consumers on the Role of Spirituality, Religion and Culture on Mental Health

International Journal of Mental Health Nursing, Volume 35, Issue 4, August 2026.
ABSTRACT This study explored the lived experiences of African Australian consumers and their perspectives on the role of spirituality, religion and culture in shaping mental health and engagement with mental health services. A qualitative phenomenological design informed by transcultural nursing perspectives was used.
Bekithemba Sibanda, Bindu. Joseph, Michael Olasoji   +2 more
wiley   +1 more source

Interference Generation of a Reverse Energy Flow with Varying Orbital and Spin Angular Momentum Density

Photonics
This paper presents a novel method for generating and shaping reverse energy flow through the interference of light fields from a minimal number of point light sources.
Andrey V. Ustinov, Alexey P. Porfirev, Svetlana N. Khonina   +2 more
doaj   +1 more source

Outcome and cost‐effectiveness of transdiagnostic cognitive behavioral therapy compared with management as usual for youth with common mental health problems: Long‐term results from the Mind‐My‐Mind randomized trial

Journal of Child Psychology and Psychiatry, Volume 67, Issue 8, Page 1307-1320, August 2026.
Background Credible long‐term outcomes from randomized trials evaluating the effectiveness and cost‐effectiveness of preventive programs for mental health problems are needed. We compared long‐term effects of the Mind My Mind (MMM) transdiagnostic cognitive behavioral therapy (CBT) program to management as usual (MAU). Methods The study was a pragmatic,
Ditte Vassard, Martin Køster Rimvall, Rasmus Trap Wolf, Robin Christensen, Sabrina M. Nielsen, Kerstin Jessica Plessen, Frank Verhulst, Niels Bilenberg, Per Hove Thomsen, Mikael Thastum, Simon‐Peter Neumer, Anne Katrine Pagsberg, Wendy K. Silverman, Christoph U. Correll, Pia Jeppesen   +14 more
wiley   +1 more source

Vector analysis of the interference of paired coplanar beams with linear or circular polarization

Компьютерная оптика
In this work, using a focusing formalism based on Richards–Wolf theory, the multi-beam interference of two and four light beams with linear or circular polarization with different orthogonality and orientation of the polarization vector is numerically ...
S.N. Khonina, A.V. Ustinov, A.P. Porfirev   +2 more
doaj   +1 more source

Enantioselective Separation and Negative Transport of Chiral Particles via Optical Needle Fields

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
This work proposes an all‐optical strategy that leverages a tailored optical needle field for the enantioselective separation and 3D manipulation of chiral particles. By introducing phase modulation, we engineer a dual‐needle configuration capable of spatially separating and negatively transporting both enantiomers within a single system, offering a ...
Manman Li, Xu Chen, Shaohui Yan, Qiang Zhang, Wenyu Gao, Yuan Zhou, Xiaohao Xu, Baoli Yao   +7 more
wiley   +1 more source