Results 91 to 100 of about 9,499,304 (290)

Grinding metre scale mirror segments for the E-ELT ground based telescope [PDF]

, 2011
The next generation of ground based telescopes require many hundreds of metre scale off-axis mirrors. In this paper the grinding of a 1.45m scale Zerodur® mirror segment for the European Extremely Large Telescope (E-ELT) is introduced.
P. Shore, P. Morantz, P. Comley, Shore, Paul, X. Tonnellier, Comley, Paul, Morantz, Paul, Tonnellier, Xavier   +7 more
core   +1 more source

Generating Helical Polymorphic Beams Using Dielectric Metasurfaces

Laser &Photonics Reviews, EarlyView.
Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh, Yang Xu, Jose A. Rodrigo, Kenneth B. Crozier   +3 more
wiley   +1 more source

Lonely and Sick: The Role of Social Media in Consumer Practices of Relief

Psychology &Marketing, EarlyView.
ABSTRACT Loneliness is increasingly recognized as a major mental health concern, yet the role of social media in alleviating it remains poorly understood. This study asks how social media help consumers cope with loneliness amid chronic illness. Focusing on women living with endometriosis, an under‐recognized and often stigmatized condition marked by ...
Beatrice Medici, Stefania Borghini, Rossella Gambetti   +2 more
wiley   +1 more source

Multi-Fiber Spectroscopy by Wide-Field Telescopes [PDF]

Symposium - International Astronomical Union, 1995
Fiber-fed multi-object systems are now the preferred instruments for gathering spectroscopic data on survey scales. The technique lends itself particularly well to telescopes with fields of 30 arcminutes or more. This paper gives a broad overview of the instrumental considerations involved in its implementation.
openaire   +1 more source

WAMDII: wide-angle Michelson Doppler imaging interferometer for Spacelab [PDF]

, 1985
A wide-angle Michelson Doppler imaging interferometer (WAMDII) is described that is intended to measure upper atmospheric winds and temperatures from naturally occurring visible region emissions, using Spacelab as a platform.
Gault, W.A., Kendall, D.J.W., Wimperis, J.R., Miller, D.W., Haslett, J.W., Kosteniuk, P.R., Johnston, S.F., Sheperd, G.G., Pasturczyk, Z.   +8 more
core   +1 more source

AI‐Driven Synthesis in Medicinal Chemistry: Integrating Large Language Models, Robotic Automation, and Sustainability Metrics to Accelerate Drug Discovery

Medicinal Research Reviews, EarlyView.
ABSTRACT Artificial intelligence (AI) is transforming synthetic chemistry from task‐specific predictors into integrated platforms that unify retrosynthesis, reaction optimization, and closed‐loop robotic automation. This review highlights how AI‐assisted planning and robotic execution shorten cycle times, reduce step counts, and improve route ...
Amit Gangwal, Antonio Lavecchia
wiley   +1 more source

Novel Bernstein‐Kantorovich Type Operators

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this paper, we introduce a novel class of Bernstein‐Kantorovich operators, denoted as Kβn,θ$$ {K}_{\beta}^{n,\theta } $$, parameterized by 0<β<1$$ 0<\beta <1 $$ and θ>0$$ \theta >0 $$. We first derive a recurrence formula that facilitates the computation of moments and central moments and provide explicit expressions for Kβn,θ(tm;x)$$ {K}_{\
Pembe Sabancigil, Nazim I. Mahmudov
wiley   +1 more source

Biodiversity and bird welfare in evaluation of tourism impact and sustainability in arid environment

People and Nature, EarlyView.
Abstract Nature‐based tourism is rapidly expanding in arid regions, raising concerns about its long‐term sustainability and potential impacts on biodiversity. However, empirical evidence evaluating its effects on both species diversity and animal welfare remains limited.
Esmat E. M. Elhassan, Martin Sládeček, Petr Chajma, Lucie Burešová Pešková, Kateřina Brynychová, Kateřina Trejbalová, Muna Bilal, Miroslav Šálek   +7 more
wiley   +1 more source

Lightning electromagnetic emission location using arrival time differencing (LEELA): An introduction to the Met Office's next generation Very Low Frequency lightning location system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This paper describes the Met Office's new lightning location system LEELA. A brief overview of the upgraded hardware and geolocation algorithms is given. LEELA has improved lightning detection capabilities, especially at night. When comparing LEELA to the previous ATDnet system against ground truths LEELA has 100% storm detection efficiency within 5 km
Graeme Marlton, Mike Protts, Stephen Prust, Edmund Keith Stone, Debbie O'Sullivan, Sue Twelves, Francesco Devoto, Claire Witham   +7 more
wiley   +1 more source

Investigation of the laser fluence and wavelength dependence in surface‐assisted laser desorption/ionization mass spectrometry using gold nanoparticles

Rapid Communications in Mass Spectrometry, EarlyView.
Rationale Surface‐assisted laser desorption/ionization (SALDI) mass spectrometry (MS) builds on the use of nanostructured surfaces (e.g., coatings of colloidal nanoparticles) to promote analyte desorption and ionization. The SALDI process is believed to occur mainly through thermal processes, resulting from heating of the nanosubstrate upon absorption ...
Wendy H. Müller, Alexander Potthoff, Klaus Dreisewerd, Jens Soltwisch   +3 more
wiley   +1 more source