Results 61 to 70 of about 392,892 (335)

Supercooled Stefan problem with a Neumann type boundary condition

Electronic Journal of Differential Equations, 2020
We consider a supercooled one-dimensional Stefan problem with a Neumann boundary condition and a variable thermal diffusivity. We establish a necessary and sufficient condition for the heat flux at the fixed face x=0, in order to obtain existence ...
Adriana C. Briozzo
doaj  

Self-propagating High temperature Synthesis (SHS) in the high activation energy regime [PDF]

, 2005
We derive the precise limit of SHS in the high activation energy scaling suggested by B.J. Matkowksy-G.I. Sivashinsky in 1978 and by A. Bayliss-B.J. Matkowksy-A.P. Aldushin in 2002. In the time-increasing case the limit turns out to be the Stefan problem
Monneau, Regis, Weiss, G. S.
core   +1 more source

Making it explicit – Sustained shared thinking dialogue as a way to explore children's perspectives on quality in German early childhood education and care

British Educational Research Journal, EarlyView.
Abstract To negotiate quality in early childhood education and care, we must ask from different perspectives what constitutes a good centre for children. The children themselves have only recently been identified as a resource to contribute to that discussion.
Katrin Macha, Frauke Hildebrandt, Caroline Wronski, Jan Lonnemann, Mathias Urban   +4 more
wiley   +1 more source

Carrier‐free self‐assembled nanomedicine for combination‐therapy of acute myeloid leukemia

BMEMat, EarlyView.
CPDS combines drugs with three different mechanisms of action to achieve a multi‐mechanism combination therapy for AML by directly killing tumor cells and activating anti‐tumor immunity. Abstract As the main acute myeloid leukemia (AML) clinical treatment, the chemotherapy alone cannot meet the clinical therapeutic needs due to the high heterogeneity ...
Meihong Chai, Rui Zhang, Haiyin Yang, Jiyue Xing, Tianyuan Hu, Mengxi Zhu, Rui Li, Xiaoli Chen, Beibei Zhao, Yang Lan, Stefan Barth, Yuanyu Huang, Li Zhang, Mengjie Zhang, Huining He   +14 more
wiley   +1 more source

The Technology Valley of Death of Circular Economy Solutions: A System Dynamics Simulation of Business Strategies for the Second‐Use Battery Industry

Business Strategy and the Environment, EarlyView.
ABSTRACT Retired electric vehicle (EV) batteries can be repurposed to stationary storage batteries. While this circularity solution has attracted attention from entrepreneurs, falling battery prices, along with the longer lifetime of new batteries, high consumer expectations and limited governmental support challenge the approach.
Juliane Seika, Merla Kubli
wiley   +1 more source

Fractional variational calculus of variable order

, 2012
We study the fundamental problem of the calculus of variations with variable order fractional operators. Fractional integrals are considered in the sense of Riemann-Liouville while derivatives are of Caputo type.Comment: Submitted 26-Sept-2011; accepted ...
A Almeida, AA Kilbas, AB Malinowska, B Brunt van, B Ross, CF Lorenzo, CFM Coimbra, D Mozyrska, D Mozyrska, F. Riewe, F. Riewe, G Diaz, GSF Frederico, GSF Frederico, HTC Pedro, J. Cresson, JA Tenreiro Machado, LES Ramirez, M Klimek, M Klimek, M Klimek, M Klimek, M Klimek, NRO Bastos, NRO Bastos, P Ivady, R Almeida, R. Almeida, SG Samko, SG Samko, SG Samko, T Odzijewicz, T Odzijewicz, TM Atanackovic   +33 more
core   +1 more source

A Stefan-Signorini problem

Journal of Differential Equations, 1984
The paper deals with a somewhat ''non-classical'' Stefan problem of the following nature. The one-dimensional slab of ice at non-positive temperature is heated at one end, and the resulting water is immediately removed at every instant of melting. In the paper this model problem is formulated as a Stefan problem with Signorini boundary conditions at ...
Friedman, Avner, Jiang, Li-Shang
openaire   +1 more source

Cluster Analysis of Circular Economy and Industrial Symbiosis Practices and Their Impact on Sustainability Performance in the Plastics Industry

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines how plastics manufacturing firms can be classified according to their level of implementation of circular economy (CE) and industrial symbiosis (IS) practices and how such adoption influences sustainability performance. Using data from plastics manufacturing firms, we integrate cluster analysis with partial least squares ...
Laura Cristina Ramírez‐Rodríguez, Rafael Mora‐Contreras, Carmen Jaca, Marta Ormazabal   +3 more
wiley   +1 more source

A Stefan problem for composite materials with an arbitrary number of moving phase-transition boundaries

Учёные записки Казанского университета: Серия Физико-математические науки
A Stefan problem of heat transfer in semi-infinite bodies with an arbitrary number of unsteady moving boundaries during phase transitions was solved. Such problems arise when composite materials are heated at high temperatures, causing the binding agents
E. L. Kuznetsova, S. I. Zhavoronok
doaj   +1 more source

A Methodology to Integrate Closed‐Cycle Heat Pumps into Batch Distillation Columns

Chemie Ingenieur Technik, EarlyView.
Batch distillation often cannot use vapor recompression due to contamination risks in food and pharma. This study proposes a design for integrating closed‐loop heat pumps using natural fluids. Results show significant energy savings, offering a sustainable alternative to traditional setups.
Philipp Dorn, Michael Libuda, Thomas Meyer, Christian Hoffmann, Jens‐Uwe Repke, Stefan Elbel   +5 more
wiley   +1 more source