Results 81 to 90 of about 7,213 (266)

Materials and Music: Selective Imperfection as a Generative Framework for Analysis, Creativity and Discovery

open access: yesInterdisciplinary Materials, EarlyView.
Vibrations in matter, from spider webs to molecules, water to flames, share a grammar with music. We propose that creativity emerges when constraints force expansion beyond existing possibilities. Selective imperfection restores balance, enabling invention.
Markus J. Buehler
wiley   +1 more source

A Study On The Frequency Of Different Types Of Optical Low Vision Aids Prescribed For Low Vision Patients Examined In The Clinic Of Optometry, Faculty Of Rehabilitation Sciences Shahid Beheshti University Of Medical Sciences, Tehran, 1387

open access: yesṬibb-i Tavānbakhshī, 2012
Background and Aim: Different diseases can be the cause of low vision. In the case of low vision, visual acuity with conventional optical devices such as glasses and contact lenses is between” 20/70 to 20/200”.
Mohammad Ghassemi Broumand   +4 more
doaj  

Euclid preparation

open access: yesAstronomy & Astrophysics
Context. The Euclid galaxy survey is designed to measure the spectroscopic redshift of emission-line galaxies (ELGs) by identifying the Hα emission line in their slitless spectra.
Risso I.   +318 more
doaj   +1 more source

The method of combinatorial telescoping

open access: yesJournal of Combinatorial Theory, Series A, 2011
We present a method for proving q-series identities by combinatorial telescoping, in the sense that one can transform a bijection or a classification of combinatorial objects into a telescoping relation. We shall illustrate this method by giving a combinatorial proof of Watson's identity which implies the Rogers-Ramanujan identities.
William Y. C. Chen   +2 more
openaire   +3 more sources

Thin‐film lithium niobate photonics: Frontiers in millimeter‐wave and terahertz generation and integrated applications

open access: yesInfoScience, EarlyView.
With the advancement of 6G communications, high‐precision radar, and advanced imaging technologies, there is a growing demand for compact, high‐performance light sources capable of generating high‐frequency radio waves (millimeter‐wave and terahertz waves). This article systematically introduces how to efficiently generate these high‐frequency waves on
Jianfeng Xiong   +8 more
wiley   +1 more source

Abordando o ensino de óptica através da construção de telescópios

open access: yesRevista Brasileira de Ensino de Física
A proposta deste trabalho é a construção artesanal de um telescópio refletor do tipo Newtoniano relacionando conteúdos abordados na disciplina de óptica, como a formação de imagens em lentes e espelhos, aberrações esféricas e cromáticas, interferência e ...
Tamara O. Bernardes   +5 more
doaj   +1 more source

Drivers and Challenges of Micro‐Irrigation Adoption and Intensity in India: A Study of Four States

open access: yesIrrigation and Drainage, EarlyView.
ABSTRACT India's food security relies substantially on groundwater, but inefficient irrigation is seriously depleting this resource. Micro‐irrigation (MI) improves irrigation application efficiency and productivity, yet adoption remains low. This study examines MI adoption across four major Indian states—Uttar Pradesh, Maharashtra, Madhya Pradesh and ...
Gurpreet Singh   +2 more
wiley   +1 more source

Neural blind deconvolution to reconstruct high-resolution ground-based solar observations

open access: yesAstronomy & Astrophysics
Context. Ground-based solar observations enable unprecedented spatial, spectral, and temporal resolution of the lower solar atmosphere, yet Earth’s turbulent atmosphere imposes significant limitations, requiring advanced post facto image reconstruction ...
Schirninger C.   +4 more
doaj   +1 more source

Coherent Stokes Raman Scattering for Simultaneous Measurement of CO2 and CH4 Temperatures

open access: yesJournal of Raman Spectroscopy, EarlyView.
A three‐beam hybrid fs/ps CSRS method is employed to excite the rovibrational transitions in the Fermi‐dyad of CO2$$ {}_2 $$ and the v2$$ {v}_2 $$ mode of CH4$$ {}_4 $$. Time‐domain spectroscopic models are developed to extract the fuel and flame temperature profiles from experimental CH4$$ {}_4 $$ and CO2$$ {}_2 $$ spectra in a diffusion flame ...
Alexander M. Warner   +3 more
wiley   +1 more source

Simulations of a 2 × 1.5D coded aperture camera for X-ray astronomy

open access: yesAstronomy & Astrophysics
The concept of two perpendicular, 1D coded aperture cameras, necessitated by the imaging capability of the detector, is applied in the design of the Wide Field Monitor (WFM).
in’t Zand J. J. M.   +5 more
doaj   +1 more source

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