Results 11 to 20 of about 1,902 (188)

Mathematical modelling and experimental study of straw co-firing with gas

open access: yesMathematical Modelling and Analysis, 2019
The main goal of the present study is to promote a more effective use of agriculture residues (straw) as an alternative renewable fuel for cleaner energy production with reduced greenhouse gas emissions.
Inesa Barmina   +7 more
doaj   +1 more source

The exact finite‐difference scheme for vector boundary‐value problems with piece‐wise constant coefficients

open access: yesMathematical Modelling and Analysis, 1998
We will consider the exact finite‐difference scheme for solving the system of differential equations of second order with piece‐wise constant coefficients.
H. Kalis
doaj   +1 more source

Mathematical modelling of alternating electromagnetic and hydrodynamic fields, induced by bar type conductors in a cylinder

open access: yesMathematical Modelling and Analysis, 2009
The heating of buildings by ecologically clean and compact local devices is an interesting and actual problem. One of the modern areas of applications developed during last ten years is an effective usage of electrical energy by alternating current to ...
Andris Buikis   +2 more
doaj   +1 more source

Barriers to Start and Develop Transformative Ecotourism Business

open access: yesEuropean Countryside, 2021
This article aims to fill the cognitive gap by providing evidence for different barriers hampering the innovative activity in ecotourism which concerns the promotion of the so-called transformative tourism concept.
Vidickienė Dalia   +4 more
doaj   +1 more source

Increasing of accuracy for engineering calculation of heat transfer problems in two layer media

open access: yesMathematical Modelling and Analysis, 2005
In this paper we study the simple algorithms for modelling the heat transfer problem in two layer media. The initial model which is based on a partial differential equation is reduced to ordinary differential equations (ODEs). The increase of accuracy is
H. Kalis, I. Kangro
doaj   +1 more source

Vortical flow of incompressible viscous fluid in finite cylinder

open access: yesMathematical Modelling and Analysis, 2008
The effective use of vortex energy in production of strong velocity fields by different devices is one of the modern areas of applications, developed during the last decade.
Harijs Kalis, Ilmārs Kangro
doaj   +1 more source

Simple methods of engineering calculation for solving heat transfer problems

open access: yesMathematical Modelling and Analysis, 2003
There are well‐known numerical methods for solving the initial‐boundary value problems for partial differential equations. We mention only some of them: finite difference method (FDM), finite element method (FEM), boundary element method (BEM), Galerkin ...
H. Kalis, I. Kangro
doaj   +1 more source

Calculation of heat and moisture distribution in the porous media layer

open access: yesMathematical Modelling and Analysis, 2007
In this paper we study the problem of the diffusion of one substance through the pores of a porous material which may absorb and immobilize some of the diffusing substances with the evolution or absorption of heat.
Harijs Kalis, Ilmars Kangro
doaj   +1 more source

Characteristic features of publications on architectural competition practice in Latvia, 1859–2013 / Publikacijų apie architektūrinių konkursų praktiką Latvijoje bruožai, 1859–2013

open access: yesMokslas: Lietuvos Ateitis, 2015
The competition practice has been rather extensively published, as publications on architectural competitions are inseparable from the competition process itself. They are a significant part of representation that explicitly promotes understanding of the
Linda Leitāne-Šmīdberga
doaj   +1 more source

BALTIJOS ŠALIŲ FILOSOFINIO DISKURSO POSOVIETINĖ TRANSFORMACIJA I

open access: yesProblemos, 2013
Straipsnis skirtas trijų Baltijos šalių filosofijos posovietinių pokyčių lyginamajai analizei, ypač pabrėžiant šių šalių filosofinių diskursų svarbesnius bruožus – augimo tempą, apimtį, dalykinę struktūrą, kokybinius pokyčius, produktyvumą.
Gintaras Kabelka
doaj   +1 more source

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