Results 81 to 90 of about 116,384 (303)

PERFORMANCE ANALYSIS OF AGRICULTURAL ACTIVITIES IN ROMANIA IN THE REGISTER OF SUSTAINABLE DEVELOPMENT [PDF]

open access: yesAnalele Universităţii Constantin Brâncuşi din Târgu Jiu : Seria Economie, 2015
Agriculture is one of the oldest occupations of the people and his continue improvement is one of the essential factors of generalized progress. Thus, it developed a range of specific branches of this field, where activate the highly specialized ...
CIPRIAN APOSTOL
doaj  

Urban spatial structure, daily mobility and energy consumption: a study of 34 European cities

open access: yesCybergeo, 2012
In this article, we compare two databases, one providing mobility data (UITP database, 2001), and the other providing population density grid cells at 200m scale for 34 European cities. Looking towards sustainable urban forms, we assess explanatory power
Florent Le Néchet
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

On the Influence of Antioxidants and Recycled MgO–C Source Material on the Mechanical Properties of Carbon‐Bonded Magnesia Refractories

open access: yesAdvanced Engineering Materials, EarlyView.
The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann   +6 more
wiley   +1 more source

Acquisition of Library Materials in Public Libraries in the Year 2011

open access: yesKnjižnica, 2012
In 2011 the Ministry of Culture co-financed the purchase of library materials in 58 public libraries in Slovenia for the last time. The project was carried out in compliance with public tender procedures.
Marjan Gujtman
doaj   +1 more source

Economic Growth and Cycles in Poland, Hungary, Czech Republic, Slovakia and Slovenia: A comparison with Spain, Austria and other EU countries, 1950-2002 [PDF]

open access: yes
We present an international comparison of economic development of 5 Central European countries, with special reference to Poland and Hungary, with some European Union Countries for the period 1950-2002.
Aguayo, Eva   +2 more
core  

Investigation of Thermo‐Chemical Processes in Commercial MgO‐C Refractory Bricks With and Without MgO‐C Recyclate at Elevated Temperatures

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm   +6 more
wiley   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat   +7 more
wiley   +1 more source

Inferring Asymmetry of Inhabitant Flow using Call Detail Records

open access: yesJournal of Advances in Information Technology, 2011
In this research, we carry out a study of the inhabitant flow using a large mobile phone data with location estimates from subscribers in Suffolk county, Massachusetts, USA that reveals the asymmetry in the flows, which reflects the way that people ...
Santi Phithakkitnukoon, Carlo Ratti
doaj   +1 more source

Resistance Rapid Heating of Aluminum Coatings in an Extreme High Vacuum–Adequate Atmosphere for Hot Stamping

open access: yesAdvanced Engineering Materials, EarlyView.
The subject of this work is the development of a corrosion‐protective coating on steel sheets for form hardening. Rapid heating in an extreme high vacuum (XHV)‐adequate atmosphere is a useful method to prevent oxidation during alloying of 22MnB5 and aluminum to obtain a metallurgical bonding.
Lorenz Albracht   +5 more
wiley   +1 more source

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