Results 91 to 100 of about 1,461,166 (322)

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

Crescimento em altura do pau-ferro (Astronium balansae) em reflorestamento Height growth of pau-ferro (Astroniumn balansae) in a plantation forest

open access: yesCiência Rural, 1998
Foi avaliado, através da técnica de análise de tronco, o crescimento em altura do pau-ferro (Astronium balansae), em reflorestamento com doze anos de idade, no município de São Sepé - RS, permitindo quantificar e descrever o crescimento cumulativo e em ...
César Augusto Guimarães Finger   +3 more
doaj   +1 more source

Technique for strip chart recorder time notation [PDF]

open access: yes, 1967
Single recorder channel helps determine the time an event is recorded on the readout of a strip chart recorder. It presents hours, tens of minutes, and minutes by a unique method of time increment identification.

core   +1 more source

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

open access: yesAdvanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian   +4 more
wiley   +1 more source

ENTERPRISE INNOVATIVE MODERNIZATION PROBLEMS AND CONDITIONS

open access: yesМодернизация, инновация, развитие, 2016
Issues related to assessment of expenses needed for an enterprise (company) innovative modernization are discussed. The assessment mechanism is based on the analysis of two parameters: the enterprise technological structure condition and the enterprise ...
N. P. Arzamasova   +2 more
doaj  

The Effect of Transition to Close-to-Nature Forestry on Growing Stock, Wood Increment and Harvest Possibilities of Forests in Slovakia

open access: yesLand
The aim of the study is to quantify the impacts of a possible transition to close-to-nature forestry in Slovakia and to compare the expected development of the total volume production, growing stock, merchantable wood increment and harvesting ...
Martina Štěrbová   +3 more
doaj   +1 more source

Understanding the Effect of Resistance Temperature Detector Temperature Controllers on Microstructural Alignment in Magnetic Freeze Casting

open access: yesAdvanced Engineering Materials, EarlyView.
The effect of temperature controllers that are commonly used in freeze‐casting is investigated in this work. Temperature controllers are observed to generate a voltage in the slurry. Microstructural alignment and ultimate compressive strength data show this voltage to interfere with the ability to align the microstructure using magnetic fields ...
Maddie A. Schmitz, Steven E. Naleway
wiley   +1 more source

Carbon storage and climate mitigation effect in Central European forestry - To be managed, or left unmanaged?

open access: yesJournal of Forest Science
This study investigates differences in carbon storage between managed and unmanaged forests in the growth conditions of Central Europe. Norway spruce (Picea abies), European beech (Fagus sylvatica) and pedunculate oak (Quercus robur) dominated forest ...
Michal Synek   +2 more
doaj   +1 more source

Quality selection in young oak stands

open access: yesJournal of Forest Science, 2007
The paper deals with an experiment that was established at Opočno Experimental Station of the Forest and Game Management Research Institute (CR) in an oak small pole stage in 1952 to test whether Schaedelin'’s (1942) tending method worked out for beech
L. Chroust
doaj   +1 more source

Development and Preliminary In Vivo Study of 3D‐Printed Bioactive Glass Scaffolds with Trabecular Architecture

open access: yesAdvanced Engineering Materials, EarlyView.
This study reports the fabrication of trabecular bioactive glass scaffolds (composition “1d”: 46.1SiO2‐28.7CaO‐8.8MgO‐6.2P2O5‐5.7CaF2‐4.5Na2O wt%) through vat photopolymerization and the relevant results from mechanical testing and in vivo implantation procedures in rabbit femora, showing great promise for bone tissue engineering applications.
Dilshat Tulyaganov   +8 more
wiley   +1 more source

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