Results 101 to 110 of about 95,279 (307)

Invariant higher-order variational problems: Reduction, geometry and applications [PDF]

open access: yes, 2013
This thesis is centred around higher-order invariant variational problems defined on Lie groups. We are mainly motivated by applications in computational anatomy and quantum control, but the general framework is relevant in many other contexts as well ...
Meier, David
core   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

open access: yesAdvanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

The implications of policy mandated professional development on new scheme mathematics teachers and their practices: a position paper

open access: yes, 2009
In Australia and internationally, an area of concern in education is the diminishing numbers of high school students participating in mathematics subjects at senior levels, contributing to a reduced number of students moving into mathematics education ...
McDaid, Karen (R14419)
core  

Multimodal Data‐Driven Microstructure Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang   +4 more
wiley   +1 more source

The students’ activity profiles and mathematic problem solving ability on the LAPS-Heuristic model learning

open access: yesUnnes Journal of Mathematics Education, 2018
Problem-solving skills that cover the ability to understand problems, design mathematical model, complete the model and interpret the solution obtained are the abilities which students must possess.
Amidi Amidi, Farah Anisah Zahra
doaj   +1 more source

Theory Reduction in Physics: A Model-Based, Dynamical Systems Approach [PDF]

open access: yes, 2013
In 1973, Nickles identified two senses in which the term `reduction' is used to describe the relationship between physical theories: namely, the sense based on Nagel's seminal account of reduction in the sciences, and the sense that seeks to extract one ...
Joshua Rosaler, Rosaler, Joshua
core  

Model reduction of descriptor systems by interpolatory projection methods [PDF]

open access: yes, 2013
In this paper, we investigate interpolatory projection framework for model reduction of descriptor systems. With a simple numerical example, we first illustrate that employing subspace conditions from the standard state space settings to descriptor ...
Gugercin, Serkan   +5 more
core   +1 more source

Symbolic Regression and Multi‐Objective Optimization of the Flory–Huggins Interaction Parameter for Hydrogels

open access: yesAdvanced Engineering Materials, EarlyView.
We develop a data‐driven method to derive the mathematical expressions of the Flory–Huggins interaction parameter χ for the swelling behavior of temperature–responsive hydrogels. Starting from initial assumptions of χ, our workflow combines Bayesian optimization, Flory–Rehner theory, and symbolic regression to generate candidate χ expressions.
Yawen Wang   +2 more
wiley   +1 more source

The Local Wisdom of Mathematical Language of Malay Community of Pangkalpinang: An Ethnographic Study

open access: yesInovasi Matematika
Pangkalpinang is the capital of Bangka Belitung Province by occupied most Melayu people with a rich culture. There are a number of cultures Pangkalpinang public relates to context learning mathematics.
Yudi Yunika Putra Putra   +1 more
doaj   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

open access: yesAdvanced 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

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