Results 11 to 20 of about 17,597 (217)

External ballistics task modelling features / Išorinės balistikos uždavinio modeliavimo ypatumai

open access: yesAviation, 2012
Based on the solutions of an external ballistics task, tables are made for firearms and tables or computer control programs for heavy weapons. If you shoot in a mountainous area where the height difference between gunner and target can be about a hundred
Albertas Pincevičius   +2 more
doaj   +1 more source

Business-to-Consumer Multi-Channel Distribution Policies: from Marketplace to Market-Space Management

open access: yesSymphonya, 2002
The new communication technologies, Internet in particular, allow businesses to achieve forms of virtual ubiquity, thus creating new factors in the control of market and competition spaces.
Emanuela Tesser
doaj   +1 more source

The transformation of waste Bakelite to replace natural fine aggregate in cement mortar

open access: yesCase Studies in Construction Materials, 2017
Bakelite material has been used to produce the various components for cars and consumer goods industry in Thailand. The growth of Bakelite consumption increases Bakelite waste.
Nopagon Usahanunth, Seree Tuprakay
doaj   +1 more source

A New Experimental Investigation for Improving Bridge Management Systems and Road Operation Sustainability

open access: yesInfrastructures, 2021
Generally, during maintenance operations on bridges and motorway viaducts, the circulation of vehicles is limited or suspended. This causes significant economic losses due to the increase in the costs of transport: delays, increased fuel consumption ...
Tullio Giuffrè   +2 more
doaj   +1 more source

Pozzolanic mortars based on waste building materials for the restoration of historical buildings [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2012
The environmental aspects of waste building materials have been of great interest in recent years. For the sector of building materials this means increased recycling, reduction of energy consumption and natural resources preservation.
Pašalić Snežana   +4 more
doaj   +1 more source

Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues

open access: yesApplied Sciences, 2021
The use of secondary mining resources to replace conventional constituents in mortars production has proved the effectiveness to preserve the quality of mechanical, physical, and chemical properties.
Joana Almeida   +3 more
doaj   +1 more source

Polyethylene (PE) Waste Minimization Study of Cement Mortar with Adding PE Content under Different W/B Ratios

open access: yesBuildings, 2022
Wastes can be effectively used in concrete and the characteristics of concrete can be maintained or enhanced, the economy of waste management can be greatly increased, and the pollution of the earth can be reduced.
Shen-Lun Tsai   +4 more
doaj   +1 more source

Utilizing residual waste particles from polyethylene terephthalate (PET) waste pellet production in cement mortar

open access: yesInternational Journal of Sustainable Engineering
Polyethylene terephthalate (PET) bottle waste management is a global challenge, with PET pellet production generating 20-23% waste particles (PWP). These particles, when deposited in landfills, do not decompose and can disperse, posing health risks ...
Sudeep Koirala   +3 more
doaj   +1 more source

An Experimental Investigation into the Performance of Concrete and Mortar with Partial Replacement of Fine Aggregate by Printed Circuit Board (PCB) E-Waste

open access: yesRecycling
The increasing accumulation of E-waste presents significant environmental challenges, particularly its disposal and resource management. The present study investigates the potential of printed circuit boards (PCBs) as a partial replacement for fine ...
Srinivasan Krishnan   +3 more
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal   +3 more
wiley   +1 more source

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