Results 71 to 80 of about 279,095 (244)

π‐Extended Silyl Enolates as Emerging Platforms in Radical Chemistry

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
This review covers the emerging role of π‐extended silyl polyenol ethers in radical chemistry. It highlights their versatile roles as electron‐rich SOMOphiles, silyl radical cation precursors, and nucleophilic partners in radical–polar crossover manifolds, while considering recent advances in photoredox catalysis, electrochemistry, and transition metal‐
Debora Guazzetti   +3 more
wiley   +1 more source

Spherical trigonometry, Yule's PARCOR identity and FLRS algorithms [PDF]

open access: yes, 1996
Yule's PARCOR Identity, in statistics, and the fundamental law of cosines, in spherical trigonometry, are indeed the same formula . This observation establishes a link between Fast Recursive Least Squares FRLS adaptive filtering and spherical ...
DESBOUVRIES (F.)
core  

Selective N‐Functionalization of Pyrazoles

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
This review traces the evolution of regioselective N‐functionalization strategies for pyrazoles, a key class of nitrogen heterocycles widely used in medicinal chemistry. Due to rapid tautomerism, N‐functionalization often lacks selectivity, leading to poor and unpredictable regioisomeric outcomes.
Lucas Popek   +2 more
wiley   +1 more source

SPHERICAL TRIGONOMETRY (Teori dan Aplikasi Pada Penentuan Awal Bulan Hijriyah Metode Hisab Hakiki Sistem Ephemeris) [PDF]

open access: yes
Permasalahan penetapan awal bulan hijriyah di Indonesia sering kali memicu perbedaan pendapat karena perbedaan metode yang digunakan. Perbedaan ini berakar pada perbedaan penafsiran ulama terhadap hadis-hadis hisab dan rukyat.
INDANA ALIATUL HIMA, 126204213209   +1 more
core   +1 more source

Pelvic axial rotation in hindlimb lame horses changes after diagnostic analgesia

open access: yesEquine Veterinary Journal, EarlyView.
Abstract Background Visual assessment of mild to moderate hindlimb lameness has low sensitivity and specificity, potentially leading to flawed diagnostic procedures. Pelvic axial rotation (roll) makes the assessment more complex but is also a potential source of information. Objectives To describe pelvic roll patterns in horses with unilateral hindlimb
Elin Hernlund   +5 more
wiley   +1 more source

A Mathematical Approach in Ship Navigation: The Integration of Trigonometry and Spherical Triangles in STEM Contexts [PDF]

open access: yes
Trigonometry and spherical triangles are branches of mathematics that are very relevant to ship navigation. Application of the concept and formula of trigonometry and spherical triangles to the positioning of ships by observing celestial bodies ...
Sriantini, Ari, Abadi, Abadi
core  

Keeping their powder dry: Purity, pollution, and handgun ownership among Jewish women in Israel

open access: yesFeminist Anthropology, EarlyView.
Abstract This article examines the gendered practices through which Jewish women in Israel experience and negotiate personal handgun ownership in everyday life. Drawing on interviews, participant observation in gun‐related spaces, and analysis of women‐only online forums, we explore the expanding participation of Jewish women in civilian gun ownership,
Maya Maor   +3 more
wiley   +1 more source

College Algebra with Trigonometry

open access: yes, 2011
This book differs from Precalculus in that Collage Algebra with Trigonometry uses right triangle trigonometry to introduce the trigonometry functionsv,770hlm ...
Barnet
core  

Verification of an Incompressible Viscoelastic Flow Solver Using the Method of Manufactured Solutions for Oldroyd‐B and Giesekus Constitutive Models

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
This study utilizes the Method of Manufactured Solutions (MMS) to validate high‐order compact finite‐difference schemes for 2D incompressible viscoelastic flows. By applying Oldroyd‐B and Giesekus models to a lid‐driven cavity benchmark, the researchers rigorously assessed numerical accuracy across varying Reynolds and Weissenberg numbers.
Juniormar Organista   +5 more
wiley   +1 more source

Breaking Extrapolation Barriers: Dual Innovations for Property and Component Design of Multi‐Component Alloy

open access: yesMaterials Genome Engineering Advances, EarlyView.
This study breaks extrapolation barriers in alloy design by merging symbolic regression with latent space sampling. The dual‐strategy framework enables accurate prediction of high‐hardness properties and navigates uncharted compositional spaces. The approach successfully designs novel high‐entropy alloys with hardness exceeding 863.5 HV, demonstrating ...
Zhigang Yu   +6 more
wiley   +1 more source

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