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RISS 인기검색어
- 검색키워드
- 저자 : Al-Mosawi, Mosa J. (검색결과 3 건)
- 무료
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Buraq Talib Shalash AL‑Mosawi,David Wexler,Andrzej Calka 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
Al-matrix composites reinforced with variant quantity of milled carbon fibers (MCFs) were manufactured via uniball magnetomilling and uniaxial hot pressing (UHP). Cylindrical compacts of these composites were produced at approximately600 °C for 15 min and 70 MPa uniaxial pressure in an argon atmosphere. The microstructure of powders and consolidatedcomposite samples were studied by X-ray diffractometry and field emission scanning electron microscope with energy dispersivespectroscopy. The physical and mechanical properties of the bulk samples were estimated by Archimedes density,Vickers microhardness, modulus of elasticity, maximum compressive strength, yield strength, nanoindentation, and specificwear rate. Results show that Al + 20 vol% of MCFs has a higher compressive strength of (710 ± 32) MPa and modulus ofelasticity of (15 ± 2) GPa compared to other composites and unreinforced Al sample. There are several factors that couldbe participate in improving the composite properties. These reasons included enhanced interface between Al matrix andMFCs, free of porosity, refined microstructure, and improved wetting between MFCs and Al matrix. Also, the specific wearrate of the composite was decreased when the MCFs volume fraction increases from 5 to 20%. This might propose thatMFCs reduced the wear of the composites by acting as a self-lubrication material and might be suggested when using thesetypes of composites in components sliding against hard surface. The notable composite properties were found at processingparameters of 50 h milling time and UHP at 600 °C for 15 min under 70 MPa applied pressure.
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Essential Oil Terpenes: Adjunctive Role in the Management of Childhood Urolithiasis
Aamir Jalal Al-Mosawi 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.2
Essential oil preparation of the terpenic type was introduced for the first time in the 1930s for the management of urolithiasis. Although essential oil preparations are registered in 50 countries, including some developed countries such as the United Kingdom, Italy, and Japan, for use in urolithiasis, no literature has been published in a peer-reviewed English (Anglo-American) medical journal. Recently the use of these terpenes has been investigated in children with urolithiasis and underlying metabolic abnormalities. The aim of this article is to extract the useful and worthy information about the use of these terpenes in urolithiasis from the previous literature as many of these articles are now considered of poor quality for a thorough systematic scientific review. The main disadvantages of most of the old literature about terpenes are the treatment was not followed radiologically and most of these articles represent anecdotal reports of spontaneous passage of calculi and symptomatic improvement of colic in association with the use of terpenes. The other aim is to discuss the possible role of essential oil terpenes in the management of childhood urolithiasis.
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Time dependent behavior of piled raft foundation in clayey soil
Fattah, Mohammed Y.,Al-Mosawi, Mosa J.,Al-Zayadi, Abbas A.O. Techno-Press 2013 Geomechanics & engineering Vol.5 No.1
Settlement of the piled raft can be estimated even after years of completing the construction of any structure over the foundation. This study is devoted to carry out numerical analysis by the finite element method of the consolidation settlement of piled rafts over clayey soils and detecting the dissipation of excess pore water pressure and its effect on bearing capacity of piled raft foundations. The ABAQUS computer program is used as a finite element tool and the soil is represented by the modified Drucker-Prager/cap model. Five different configurations of pile groups are simulated in the finite element analysis. It was found that the settlement beneath the piled raft foundation resulted from the dissipation of excess pore water pressure considerably affects the final settlement of the foundation, and enough attention should be paid to settlement variation with time. The settlement behavior of unpiled raft shows bowl shaped settlement profile with maximum at the center. The degree of curvature of the raft under vertical load increases with the decrease of the raft thickness. For the same vertical load, the differential settlement of raft of ($10{\times}10m$) size decreases by more than 90% when the raft thickness increased from 0.75 m to 1.5 m. The average load carried by piles depends on the number of piles in the group. The groups of ($2{\times}1$, $3{\times}1$, $2{\times}2$, $3{\times}2$, and $3{\times}3$) piles were found to carry about 24%, 32%, 42%, 58%, and 79% of the total vertical load. The distribution of load between piles becomes more uniform with the increase of raft thickness.
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