Results 11 to 20 of about 19,996 (261)

Experimental Study on the Improvement of the Film Cooling Effectiveness of Various Modified Configurations Based on a Fan-Shaped Film Cooling Hole on a Flat Plate

open access: yesEnergies, 2023
Modern gas turbines have evolved by increasing the turbine inlet temperature (TIT) to improve performance. This development has led to a demand for cooling techniques.
Seokmin Kim   +3 more
doaj   +1 more source

The ammonoids from the Three Forks Shale (Late Devonian) of Montana [PDF]

open access: yesFossil Record, 2006
The ammonoid fauna from the Late Devonian Three Forks Shale of Montana is revised. Six taxa were recognised, which belong to the genera Tornoceras, Pernoceras, Raymondiceras, Platyclymenia, Pleuroclymenia, and Carinoclymenia.
D. Korn, A. Titus
doaj   +5 more sources

Assessing the Compliance of Road Widening and Improvement Standards with Rural Community Needs (A Case Study of Villages in Paveh) [PDF]

open access: yesPizhūhish/hā-yi Rūstāyī, 2020
One of the components of the Haadi Plan is the development of rural passage networks. The network of passages is considered as the main mmaters of the village because all human, livestock and commodity transport is possible in these communication ...
Rahmatollah Bahrami Paveh
doaj   +1 more source

The Apollonian Staircase

open access: yesInternational Mathematics Research Notices, 2023
Abstract A circle of curvature $n\in \mathbb{Z}^+$ is a part of finitely many primitive integral Apollonian circle packings. Each such packing has a circle of minimal curvature $-c\leq 0$, and we study the distribution of $c/n$ across all primitive integral packings containing a circle of curvature $n$.
openaire   +3 more sources

Parsimonious edge-coloring on surfaces

open access: yesElectronic Journal of Graph Theory and Applications, 2018
We correct a small error in a 1996 paper of Albertson and Haas, and extend their lower bound for the fraction of properly colorable edges of planar subcubic graphs that are simple, connected, bridgeless, and edge-maximal to other surface embeddings of ...
Sarah-Marie Belcastro
doaj   +1 more source

Determining the endurance limit of AISI 4340 steels in terms of different statistical approaches

open access: yesFracture and Structural Integrity, 2021
In engineering applications, fatigue phenomenon is a key issue and needs to be analyzed in the beginning of design phase in case of any component exposed to alternating loading on operation otherwise catastrophic fatigue failure may cause.
Salim �aliskan, Riza G�rb�z
doaj   +1 more source

Numerical Evaluation of the Seismic Performance of a Concrete Staircase Isolated with Compression Struts [PDF]

open access: yesپژوهش‌های زیرساخت‌های عمرانی
The reinforced concrete stair system, as a critical component of a safe egress path in buildings, has shown considerable vulnerability during past earthquakes.
Mohammad Chavoshi   +2 more
doaj   +1 more source

Investigation on the Seismic Performance of RC Frame Buildings with Rubber Isolation Bearing Installed in Staircases

open access: yesBuildings, 2023
A rubber isolation bearing installed in a staircase (RBS) was proposed to mitigate seismic damages to the component of staircases and improve their seismic performance.
Liang Bai   +5 more
doaj   +1 more source

BETWEEN SPATIAL AND ARCHIVAL DATA: DIGITAL HUMANITIES FOR THE HISTORY OF A STAIRCASE OF PITTI PALACE [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
In the last decades, surveys produced with geomatic techniques are increasingly used for the study and conservation of the built heritage because they automatically collect large amounts of data with an accuracy and objectivity that could not be achieved
L. Fiorini   +5 more
doaj   +1 more source

The Representation of Staircases in Italian Treatises from the Sixteenth to Eighteenth Centuries

open access: yesDiségno, 2018
The representation of the staircase is part of the more general theme of architectural drawing. Since ancient times, the designing of the staircase has been worthy of attention, due to both its useful function in overcoming the differences in floors as ...
Vincenzo Cirillo
doaj   +1 more source

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