Results 51 to 60 of about 251,351 (310)
Age and gender patterns in emergency alarms and missions: a cross-sectional observational study
BMC Emergency MedicineBackground Emergency medical services play a key role in the healthcare system. An ageing population, economic challenges, and technological advances require emergency prehospital care to be flexible, efficient, and equal.
Kean Tang +3 more
doaj +1 more source
Transport, 2003 The method of statistical imitative simulation (Monte-Carlo) was used to simulate the heterogeneity of the produced asphalt concrete mixture (ACM) mineral part grading.
Valentinas Podviezko +1 more
doaj +1 more source
Novel Investigation of Multivariable Conformable Calculus for Modeling Scientific Phenomena
Journal of Mathematics, 2021 New investigation on the conformable version (CoV) of multivariable calculus is proposed. The conformable derivative (CoD) of a real-valued function (RVF) of several variables (SVs) and all related properties are investigated.
Mohammed K. A. Kaabar +4 more
doaj +1 more source
Continuum tree asymptotics of discrete fragmentations and applications to phylogenetic models
, 2008 Given any regularly varying dislocation measure, we identify a natural self-similar fragmentation tree as scaling limit of discrete fragmentation trees with unit edge lengths.
Miermont, G +15 more
core +1 more source
Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys
Advanced Engineering Materials, EarlyView.Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak +3 more
wiley +1 more source
Conditioned, quasi-stationary, restricted measures and escape from metastable states [PDF]
, 2016 We study the asymptotic hitting time τ(n) of a family of Markov pro- cesses X(n) to a target set G(n) when the process starts from a “trap” defined by very general properties.
Fernandez, R. +8 more
core +1 more source
Optimization of the Production of Rubber Compounds Using Mathematical Models
Advanced Engineering Materials, EarlyView.Rubber compounds were mixed in a batch internal mixer, and symbolic regression was used to derive mathematical models linking recipe and process parameters to ram path, torque, and mixing quality (incorporation, dispersion, distribution). Subsequent optimization with evolutionary algorithms identified operating conditions that reduce specific energy ...
Anke Bardehle +7 more
wiley +1 more source
The Flexible Fréchet Distribution: Properties, Inference, and Medical Applications
Journal of MathematicsThis paper introduces the Marshall–Olkin Weibull–Fréchet (MOWFr) distribution, a modified form of the Fréchet model that demonstrates improved fitting capabilities compared to established generalizations.
Ahmed Z. Afify +4 more
doaj +1 more source
E-Assessment Using Variable-Content Exercises in Mathematical Statistics
Journal of Statistics Education, 2018 Computer-assisted assessment (CAA) is widely used in modern university courses in many different fields. It can be used both in formative and summative assessments and with different emphasis on (self-)training, grading, and feedback generation.
Till Massing +4 more
doaj +1 more source
Limit distribution theory for maximum likelihood estimation of a log-concave density
, 2009 We find limiting distributions of the nonparametric maximum likelihood estimator (MLE) of a log-concave density, that is, a density of the form $f_0=\exp\varphi_0$ where $\varphi_0$ is a concave function on $\mathbb{R}$.
Rufibach, K +6 more
core +1 more source