Results 101 to 110 of about 226,041 (306)

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

A Mixed-methods Analysis of the Experiences of Participants Having Been Involved in Long-term Intervention Research Conducted in a Rural Area of Delhi

Indian Journal of Public Health
Background: Experience of participants in health research is very important as they are one of the major stakeholders. Yet, this still remains an unexplored area.
Bratati Banerjee, Sahadev Santra, Rupsa Banerjee   +2 more
doaj   +1 more source

Feasibility of Nitrogen as a Carrier Gas for Inconel Cold Spray in Hydropower Application

Advanced Engineering Materials, EarlyView.
N2, despite being nearly two orders of magnitude cheaper than He, is a feasible carrier gas for cold spray Inconel coatings in hydropower repair applications when higher gas temperature and pressure are used. Reducing powder size significantly improved cavitation resistance, while the addition of fine chromium carbide particles further enhanced erosion
Tianhao Wang, Mayur Pole, Tingkun Liu, Kenneth A. Ross, Christopher B. Smith   +4 more
wiley   +1 more source

Telomere Attrition Due to Infection

, 2008
BackgroundTelomeres--the terminal caps of chromosomes--become shorter as individuals age, and there is much interest in determining what causes telomere attrition since this process may play a role in biological aging.
Kotrschal Alexander, Ilmonen, Petteri, Penn, Dustin J., Petteri Ilmonen, Ilmonen Petteri, Penn Dustin J., Kotrschal, Alexander, Alexander Kotrschal, Dustin J Penn   +8 more
core   +1 more source

Influence of Si Content and Milling Duration on the Microstructure and Mechanical–Tribological Properties of AlCoCrFeNiSi High‐Entropy Alloys

Advanced Engineering Materials, EarlyView.
Si‐doped AlCoCrFeNi high‐entropy alloys are synthesized by mechanical alloying to reveal the effect of Si content and milling time on phase evolution, microstructural refinement, and tribological behavior. A transition from FCC to BCC structure, significant grain refinement, and enhanced hardness and wear resistance are achieved, with the 4 at% Si ...
Mustafa Okumuş, Mehmet Emin Demir, Sercan Özpınar   +2 more
wiley   +1 more source

Attrition Defenses for a Peer-to-Peer Digital Preservation System

, 2004
In peer-to-peer systems, attrition attacks include both traditional, network-level denial of service attacks as well as application-level attacks in which malign peers conspire to waste loyal peers' resources.
David S. H. Rosenthal, Giuli, T.J., TJ Giuli, T J Giuli, Mema Roussopoulos, Mary Baker, Petros Maniatis, Maniatis, Petros, Barker, Mary, Rosenthal, David S. H., Roussopoulos, Mema   +10 more
core   +1 more source

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

Advanced 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, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Benchmarking retention, progression, and graduation rates in undergraduate higher education across different time windows

Cogent Education
Students’ retention rates (RR), students’ progression rates (PR), and students’ graduation rates (GR) are statistical figures commonly used in higher education to monitor the performance of higher education institutions (HEI), academic programs (courses),
Osama A. Marzouk
doaj   +1 more source

Attrition analysis

Tidsskrift for Den norske legeforening, 2022
openaire   +2 more sources

Who Leaves? Teacher Attrition and Student Achievement [PDF]

Almost a quarter of entering public-school teachers leave teaching within their first three years. High attrition would be particularly problematic if those leaving were the more able teachers. The goal of this paper is estimate the extent to which there
James Wyckoff, Pam Grossman, Hamilton Lankford, Susanna Loeb, Donald Boyd   +4 more
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