Results 21 to 30 of about 6,547,132 (319)

A rework reduction model for construction projects [PDF]

open access: yes, 2004
Rework is an endemic problem in building construction projects and is an area of research that has received limited attention. Recent research has shown that rework is the primary cause of time and schedule overruns in projects and that rework levels do ...
Edwards, DJ, Irani, Z, Love, PED
core   +2 more sources

Shape-preserving amorphous-to-crystalline transformation of CaCO3 revealed by in situ TEM

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2020
Significance Understanding of the shape-preserving crystallization from transient amorphous precursors to crystalline products in biomineralization makes it possible to produce topologically complex morphologies that defy crystallographic controls.
Zhaoming Liu   +7 more
semanticscholar   +1 more source

Organizational energy: A behavioral analysis of human and organizational factors in manufacturing [PDF]

open access: yes, 2015
This paper seeks to explore the behavior and embodied energy involved in the decision-making of information technology/information systems (IT/IS) investments using a case within a small- to medium-sized manufacturing firm.
Irani, Z, Papadopoulos, T, Sharif, AM
core   +3 more sources

A TEM investigation of optical variations in sphalerite. [PDF]

open access: yes, 1987
Sphalerites from the Force Crag Pb-Zn vein, N England, show darker coloured zones found not only to be richer in Cu, Fe, Sb, Ag and Pb but also to contain precipitates of tetrahedrite-like composition.
Dickinson, C., Pattrick, R. A D
core   +1 more source

In Situ TEM Study on Conversion‐Type Electrodes for Rechargeable Ion Batteries

open access: yesAdvances in Materials, 2020
Conversion‐type materials have been considered as potentially high‐energy‐density alternatives to commercially dominant intercalation‐based electrodes for rechargeable ion batteries and have attracted tremendous research effort to meet the performance ...
Jiang Cui, Hongkui Zheng, K. He
semanticscholar   +1 more source

Comparative Studies of Synthesized Copper Oxide Nanoparticles using Aqueous Extract of Leaves [PDF]

open access: yesNanochemistry Research, 2023
The use of plant extracts as reducing agents in the synthesis of metal and metal oxide nanoparticles has come into prominence due to their procedural simplicity, precursor’s eco-friendliness, and cost effectiveness.
Emmanuel Oyetola   +5 more
doaj   +1 more source

Water Pollution and its Treatment using nanocomposites of graphene oxide (GO 50%) / Zn2+ for different dyes and heavy metals using sol-gel synthesized

open access: yesJournal of Scientific Research in Science, 2023
In this study, Spinel nano ferrite (MFe2O4) ferrite powders were prepared by auto-combustion reaction. Nanoparticles have been synthesized by sol-gel method using citric acid as chemical catalyst while graphene Oxide prepared using Hammer technique and ...
R. Atya, N. Okasha, A.Azab, A.M. Baker
doaj   +1 more source

Sequences of the Genes for the TEM-20, TEM-21, TEM-22, and TEM-29 Extended-Spectrum β-Lactamases [PDF]

open access: yesAntimicrobial Agents and Chemotherapy, 1999
ABSTRACT The sequences of the bla TEM genes encoding TEM-20, TEM-21, TEM-22, and TEM-29 extended-spectrum β-lactamases were determined. Analysis of the deduced amino acid sequences indicated that TEM-20 and TEM-29 were derived from TEM-1 and that TEM-21 and TEM-22 were derived from TEM-2.
G, Arlet   +3 more
openaire   +2 more sources

Synthesis and characterization of Fe2O3 nanoparticles reinforced to recycled industrial aluminium scrap and waste aluminium beverage cans for preparing metal matrix nanocomposites

open access: yesFracture and Structural Integrity, 2022
Increased material demand in all sectors is primarily due to exponential growth in population to fulfill human needs and comforts. Recycling of collected aluminium beverage cans and Al 6061 alloy scraps from industries ensures significant advantages in ...
Ganesh R. Chate   +8 more
doaj   +1 more source

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