Results 81 to 90 of about 2,867,234 (274)

The problem of general center-focus and bifurcation of limit cycles for a planar system of nine degrees

Journal of Computational and Applied Mathematics, 2009
This paper considers the system \[ \begin{aligned} {dx\over d\tau} &=-(x\delta+ y)(x^2+ y^2)^4- P_8(x, y),\\ {dy\over d\tau} &=(x- y\delta)(x^2+ y^2)^4+ Q_8(x,y),\end{aligned}\tag{1} \] where \(P_8\), \(Q_8\) are a polynomial of degree \(8\). This system has three singular points of center-focus type \((-{1\over 2}, 0)\), \((-{1\over 2},{1\over 2})\), \
Du, Chaoxiong, Liu, Yirong
openaire   +2 more sources

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Optimizing Placement and Scheduling for VNF by a Multi-objective Optimization Genetic Algorithm

International Journal of Computational Intelligence Systems
Virtual network functions (VNFs) have gradually replaced the implementation of traditional network functions. Through efficient placement, the VNF placement technology strives to operate VNFs consistently to the greatest extent possible within restricted
Phan Duc Thien, Fan Wu, Mahmoud Bekhit, Ahmed Fathalla, Ahmad Salah   +4 more
doaj   +1 more source

L’adaptation des territoires aux changements climatiques dans l’Oriental marocain : la vulnérabilité entre action et perceptions

VertigO, 2016
After years of delay to protect the earth from increasing greenhouse gas emissions, the issue of climate change has appeared front and center as a new object of research in the social sciences since the early 2000s.
Alain François, Evelyne Gauché, Alain Génin   +2 more
doaj   +1 more source

Around the Poincaré center-focus problem

, 2018
Multe modele matematice folosesc sisteme de ecuatii diferentiale si aplica teoria calitativa a ecuatiilor diferentiale, elaborata de Poincare si Liapuno . Una din probleme ce persista ^n studiul acestor sisteme consta ^n determinarea conditiilor care asigura ca punctul singular este un centru Problema Centrului si Focarului.
Cioban, M.M., Choban, M.M.
openaire   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source

Scene Reconstruction from Multiple Images with Single Centre of Projection

Arid Zone Journal of Engineering, Technology and Environment, 2018
One problem which has remained deeply rooted in multi-view geometry is the reconstruction of a three-dimensional (3D) scene starting with multiple two-dimensional (2D) representations of different parts of the same scene. In this paper, the main focus is
A. I. Audu, A. H. Sadka
doaj  

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

Research of Logistics Cost Based on Saving Algorithm: A Case of A Certain Logistics Company’s Logistics Cost

MATEC Web of Conferences, 2016
In recent years, logistics companies of different sizes has been considerably developed all over the country, with the intensified competitions. To stand out in the competitive market, a logistics company must improve its logistics situation, focus on ...
Nie Jing, Zeng Wei Yuan, Jing Hong Lei
doaj   +1 more source

Re‐Awakening Public Attention to the Silent Pandemic of Cancer Among Older Adults in Low‐ and Middle‐Income Countries

Aging and Cancer, EarlyView.
ABSTRACT As global populations age, cancer is increasingly becoming a leading cause of morbidity and mortality among older adults, particularly in low‐ and middle‐income countries (LMICs). Despite accounting for the majority of new cancer cases and deaths, older individuals remain underrepresented in cancer research, clinical guidelines, and health ...
Ibrahim Bidemi Abdullateef, Sunkanmi Folorunsho, Abdulazeez Opeyemi Abdulganiyu   +2 more
wiley   +1 more source