Results 21 to 30 of about 913,242 (189)

PREDICTION OF UNCONFINED COMPRESSIVE STRENGTH OF ROCKS BY POINT LOAD STRENGTH INDEX [PDF]

open access: yesJournal of Al-Azhar University Engineering Sector, 2019
The point load testing is widely used to determine rock strength indeces in geotechnicalpractices as a result to simplicity. The present study presents correlation equations betweenthe unconfined compressive strength (qu) and point load strength index Is(50) adopted fordifferent types of rocks.
Mohamed mohamed   +2 more
openaire   +1 more source

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria [PDF]

open access: yes, 2018
Purpose. Limestone and marble are carbonate rocks with several structural and engineering applications. The physical and mechanical properties of the rocks are fundamental as they determine their suitability for various use.
Idris, M.A.
core   +1 more source

Fuzzy Load-Shedding Strategy Considering Photovoltaic Output Fluctuation Characteristics and Static Voltage Stability

open access: yesEnergies, 2018
Based on the equilibrium point equations of a classic three-node system integrated with a large-scale photovoltaic cell (PV) power plant, the impact of PV output fluctuation on the saddle-node bifurcation (SNB) was derived and analyzed. When PV runs in a
Sheng Li, Zhinong Wei, Yanan Ma
doaj   +1 more source

Reinforcement of wood with natural fibers [PDF]

open access: yes, 2013
This paper describes an experimental programme which examines the reinforcement in flexure of timber beams with composite materials based on natural fibers in the form of fabrics made from hemp, flax, basalt and bamboo fibers.
A. Borri   +17 more
core   +1 more source

A new index combining weak layer and slab properties for snow instability prediction [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2015
Snow slope stability evaluation requires considering weak layer as well as slab properties – and in particular their interaction. We developed a stability index from snow micro-penetrometer (SMP) measurements and compared it to 129 concurrent point ...
J. Schweizer, B. Reuter
doaj   +1 more source

Correlation study some dynamic properties with density, point load Index and Uniaxial compressive strength of some units of Mukdadya (lowerBakhtiari) Formation

open access: yesTikrit Journal of Pure Science, 2023
Geotechnical study conducted upon 10 rock samples have been taken from outcroup of Mukdadiya Formation (Lower Bakhtiari) which are located in Kirkuk anticline.
Burkan S. Othman, Dahir K. ALI
doaj   +1 more source

Fill the void: improved scheduling for optical switching [PDF]

open access: yes, 2015
With ever-increasing demand for bandwidth, optical packet/burst switching is proposed to utilize more of the available capacity of optical networks in the future.
Bruneel, Herwig   +2 more
core   +1 more source

Load and resistance factors for prestressed concrete girder bridges

open access: yesBudownictwo i Architektura, 2020
There has been a considerable progress in the reliability-based code development procedures. The load and resistance factors in the AASHTO bridge design code were determined using the statistical parameters from the 1970's  and early 1980’s.
Andrzej S. Nowak, Olga Iatsko
doaj   +1 more source

Evaluating Distributed Time-Varying Generation Through a Multiobjective Index [PDF]

open access: yes, 2008
In the last decade, distributed generation, with its various technologies, has increased its presence in the energy mix presenting distribution networks with challenges in terms of evaluating the technical impacts that require a wide range of network ...
Harrison, Gareth   +2 more
core   +2 more sources

An Absolute Flux Density Measurement of the Supernova Remnant Casseopia A at 32 GHz [PDF]

open access: yes, 1999
We report 32 GHz absolute flux density measurements of the supernova remnant Cas A, with an accuracy of 2.5%. The measurements were made with the 1.5-meter telescope at the Owens Valley Radio Observatory. The antenna gain had been measured by NIST in May
A. C. S. Readhead   +17 more
core   +2 more sources

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