Results 11 to 20 of about 1,106,628 (289)

The Performance of Clay-based Biomass Briquette Stove with Three Geometry Shape Variations

open access: yesProtek: Jurnal Ilmiah Teknik Elektro, 2023
Biomass briquette stove is a cooking tool that is still widely used by the people of the interior of South Sulawesi. Even in urban areas, it is not uncommon to find their use because of the ease of obtaining briquettes and its relatively good efficiency.
Sallolo Suluh   +5 more
doaj   +1 more source

Modeling of the dynamics of tornado structures in a pipe with turbulators of square, semicircular and triangular profiles

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2021
Objectives. To carry out mathematical simulations of changes in time of tornado compositions in channels with projections of semicircular, triangular, square profiles for average Reynolds criteria based on multiblock computing technology with the ...
I. E. Lobanov
doaj   +1 more source

Structured Rectangular Tensors and Rectangular Tensor Complementarity Problems [PDF]

open access: yesMathematical Problems in Engineering, 2020
In this paper, some properties of structured rectangular tensors are presented, and the relationship among these structured rectangular tensors is also given. It is shown that all the V-singular values of rectangular P-tensors are positive. Some necessary and/or sufficient conditions for a rectangular tensor to be a rectangular P-tensor are also ...
Qingyu Zeng, Jun He, Yanmin Liu
openaire   +2 more sources

Experiments on Liquid Flow through Non-Circular Micro-Orifices

open access: yesMicromachines, 2020
Microfluidics is an active research area in modern fluid mechanics, with several applications in science and engineering. Despite their importance in microfluidic systems, micro-orifices with non-circular cross-sections have not been extensively ...
Stefano Cassineri   +4 more
doaj   +1 more source

Rectangular GLT sequences

open access: yesETNA - Electronic Transactions on Numerical Analysis, 2022
The theory of generalized locally Toeplitz (GLT) sequences is a powerful apparatus for computing the asymptotic spectral distribution of square matrices $A_n$ arising from the discretization of differential problems. Indeed, as the mesh fineness parameter $n$ increases to $\infty$, the sequence $\{A_n\}_n$ often turns out to be a GLT sequence.
Garoni, Carlo   +4 more
openaire   +5 more sources

Investigation of Sonic Under-expanded Jets Using Slotted Rectangular Mechanical Tabs [PDF]

open access: yesJournal of Applied Fluid Mechanics
Study on the behavior of jet flows are important for various reasons especially in the fields of aerospace, mechanical engineering, and environmental science.
K. Anusindhiya   +2 more
doaj   +1 more source

Proses Koneksi Matematis Siswa Kelas VIII Masalah Segiempat

open access: yesJurnal Pendidikan: Teori, Penelitian, dan Pengembangan, 2019
: The purpose of this study is to describe the students' mathematical connection process in solving quadrilateral problems. The approach used is a descriptive explorative qualitative approach.
Riska Indah Wardina   +2 more
doaj   +1 more source

Numerical Investigation of Channel Geometry on the Performance of a Pem Fuel Cell

open access: yesInternational Journal of Applied Mechanics and Engineering, 2013
A complete three-dimensional and single phase model for proton exchange membrane (PEM) fuel cells was used to investigate the effect of using different channels geometry on the performances, current density and gas concentration. The proposed model was a
I. Khazaee, M. Mohammadiun
doaj   +1 more source

A Rectangular Area Filling Display System Architecture [PDF]

open access: yes, 1982
A display system architecture which has rectangular area filling as its primitive operation is presented. It is shown that lines can be drawn significantly faster while rendition of filled boxes shows an O(n^2) speed improvement.
Whalen, Daniel S
core   +1 more source

Analytical Stress-Strain Model for FRP-Confined Rectangular RC Columns

open access: yesFrontiers in Built Environment, 2019
One of the major applications of Fiber Reinforced Polymers (FRPs) in construction is in the confinement of reinforced concrete (RC) columns. The performance of FRP-confined concrete in circular columns has been extensively investigated in literature and ...
Konstantinos G. Megalooikonomou   +1 more
doaj   +1 more source

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