Results 61 to 70 of about 23,637 (210)

Energy flows in vibrated granular media

open access: yes, 1998
We study vibrated granular media, investigating each of the three components of the energy flow: particle-particle dissipation, energy input at the vibrating wall, and particle-wall dissipation.
A. D. Rosato   +23 more
core   +1 more source

Mo‐Coordinated Phosphinophosphonium Cations in Catalytic P–H Activation

open access: yesChemCatChem, Volume 18, Issue 5, 13 March 2026.
Mo‐bound [R2P–PR2H]+ ligands, which form spontaneously from phosphenium complexes in the presence of PR2H, exhibit both phosphine and H+ exchange chemistry. Their Bronsted acidity has been exploited in catalytic Markovnikov hydrophosphination of 1,1‐diphenylethylene and catalytic dehydrogenative coupling of secondary phosphines, which occurs via an ...
Nicholas B. Dyck   +2 more
wiley   +1 more source

Internalization of Responsibility to Protect (R2P): Responsibility to Invoke ‘Peace from Within’ Afghanistan by the Taliban Regime (2021)

open access: yesNUST Journal of International Peace and Stability
Sovereignty, concerning state authority, endows the Responsibility to Protect (R2P) the rights of citizens. This redefined and broadened scope of sovereignty is ascribed to the international norm of the R2P.
Fujin Naz Haidery
doaj   +1 more source

Unbound motion on a Schwarzschild background: Practical approaches to frequency domain computations

open access: yes, 2017
Gravitational perturbations due to a point particle moving on a static black hole background are naturally described in Regge-Wheeler gauge. The first-order field equations reduce to a single master wave equation for each radiative mode.
Hopper, Seth
core   +1 more source

Spectroscopic Methods of Edible Flower Authentication and Quality Control for Food Applications

open access: yeseFood, Volume 7, Issue 1, February 2026.
The global demand for edible flowers has increased. Issues such as incorrect species identification, flower product adulteration, contamination, and quality degradation necessitate the application of proper methods for authenticating and controlling the product's quality.
Fidele Benimana   +3 more
wiley   +1 more source

Non-invasive characterization of color variation in plant-based meat burgers using portable hyperspectral imaging device and multivariate image analysis

open access: yesFuture Foods
The excessive color variation in plant-based meat burgers (PB) during storage, arising from the interplay of multiple ingredients, suggests the acute need for real-time color monitoring techniques.
Logesh Dhanapal, Chyngyz Erkinbaev
doaj   +1 more source

Time delay in the Einstein-Straus solution

open access: yes, 2010
The time delay of strong lensing is computed in the framework of the Einstein-Straus solution. The theory is compared to the observational bound on the time delay of the lens SDSS J1004+4112.Comment: 20 pages, 4 tables, 1 ...
A. Einstein   +17 more
core   +1 more source

The Role of the European Union in Managing African Crises Between Development Aid and Geopolitical Interests

open access: yesWorld Affairs, Volume 189, Issue 1, Spring 2026.
ABSTRACT This study conducts a comprehensive and critical examination of the interplay between development assistance and strategic geopolitical objectives in the European Union's (EU) engagement with African crises. Although the EU positions itself as a normative power committed to advancing peace, development, and human rights, its practices often ...
Edmond Chick   +1 more
wiley   +1 more source

Humanitarian Intervention and R2P [PDF]

open access: yesJournal of International Peacekeeping, 2020
In this piece, Henderson looks to the shadow of Rwanda in terms of the concept of humanitarian intervention, and the evolution of the R2P doctrine. Tracing the re-examination of the conceptualisations of sovereignty and the principle of non-intervention that evolved after Rwanda, Henderson assesses the legal, normative, and institutional challenges ...
openaire   +1 more source

Modeling and Simulation of Vaccination and Awareness Strategies to Control HPV Transmission and Cervical Cancer Progression in Burkina Faso

open access: yesJournal of Applied Mathematics, Volume 2026, Issue 1, 2026.
The persistent clinical burden of human papillomavirus (HPV) infection and its progression to cervical malignancy constitutes a major public health challenge in low‐ and middle‐income countries, with particular relevance to Burkina Faso. In this work, we develop a deterministic SEIR‐type compartmental model that incorporates dual transmission routes ...
Joël Lankoande   +3 more
wiley   +1 more source

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