Results 91 to 100 of about 3,461,548 (318)

Agent-Mediated Social Choice [PDF]

open access: yesarXiv, 2018
Direct democracy is often proposed as a possible solution to the 21st-century problems of democracy. However, this suggestion clashes with the size and complexity of 21st-century societies, entailing an excessive cognitive burden on voters, who would have to submit informed opinions on an excessive number of issues.
arxiv  

OGLE Cepheids and RR Lyrae Stars in the Milky Way [PDF]

open access: yes, 2017
We present new large samples of Galactic Cepheids and RR Lyrae stars from the OGLE Galaxy Variability Survey.
arxiv   +1 more source

Teacher Competence and 21st Century Skills in Transformation Schools 2025 (TS25)

open access: yes, 2020
The purpose of this study is to identify the relationship between teacher competence and 21st century skills. Besides, the study also examines the influence of each dimension on teacher competence that contributes to predictive factors in 21st century ...
Jamilah Sulaiman, Siti Noor Ismail
semanticscholar   +1 more source

Assessing sheep’s wool as a filtration material for the removal of formaldehyde in the indoor environment [PDF]

open access: yes, 2014
textFormaldehyde is one of the most prevalent and toxic chemicals found indoors, where we spend ~90% of our lives. Chronic exposure to formaldehyde indoors, therefore, is of particular concern, especially for sensitive populations like children and ...
Wang, Jennifer, active 21st century
core  

On the manifestations of particles [PDF]

open access: yes"Mathematical Physics Towards the 21st Century", Proceedings Beer-Sheva 1993, Ben Gurion University Press 1994, 1995
The mathematical description of stable particle-like systems appearing in relativistic quantum field theory at large, respectively small scales or non-zero temperatures is discussed.
arxiv  

The Correlation of Digital Literation and STEM Integration to Improve Indonesian Students’ Skills in 21st Century

open access: yes, 2020
Dynamic human development in the 21st Century demands students to make innovations in the world of education. Students are required to have 21st-century skills, namely creativity, critical thinking, collaboration, and communication. In contrast, teachers
Dedi Riyan Rizaldi   +2 more
semanticscholar   +1 more source

Bio-inspired nanophotonics : manipulating light at the nanoscale with plasmonic metamaterials [PDF]

open access: yes, 2014
textMetals interact very differently with light than with radio waves and finite conductivities and losses often limit the way that RF concepts can be directly transferred to higher frequencies.
Zhao, Yang, active 21st century
core  

Meeting Global Cooling Demand with Photovoltaics during the 21st Century [PDF]

open access: yes, 2019
Space conditioning, and cooling in particular, is a key factor in human productivity and well-being across the globe. During the 21st century, global cooling demand is expected to grow significantly due to the increase in wealth and population in sunny nations across the globe and the advance of global warming.
arxiv   +1 more source

Eutrophication will increase methane emissions from lakes and impoundments during the 21st century

open access: yesNature Communications, 2019
Lakes and impoundments are an important source of methane (CH4), a potent greenhouse gas, to the atmosphere. A recent analysis shows aquatic productivity (i.e., eutrophication) is an important driver of CH4 emissions from lentic waters.
J. Beaulieu, T. DelSontro, J. Downing
semanticscholar   +1 more source

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