Why Bigger Isn't Better in Earth Observation.

Oxygen electroreduction catalyzed by gold nanoclusters: strong core size effects.

Bigger isn't better: Gold nanoclusters exhibit enhanced electrocatalytic activity in oxygen reduction when the core size decreased from Au(140) to Au(11), as reflected by the onset potential E(onset) and peak current density J(K) (see picture). The increasing fraction of surface atoms with low coordination numbers and the shift of the d-band center to the Fermi level facilitate oxygen adsorption.

Scheduling a constellation of agile earth observation satellites with preemption

In this paper, we consider a scheduling problem for a set of agile Earth observation satellites for scanning  different parts of the Earth’s surface. We assume that preemption is allowed to prevent repetitive images and develop four different preemption policies. Scheduling is done for the imaging time window and transmission time domain to the Earth stations as well. The value of each picture ...

Why Meaning (Probably) Isn't Conceptual Role

From Boo ean A 9 ebra to Unified Algebra

In t roduct ion This paper is about the symbols and notations of boolean algebra, and about the way the subject is explained. It is about education, and about putting boolean algebra into general use and practice. To make the scope clear, by "boolean algebra" I mean the algebra whose expressions are of type boolean. I mean to include the expressions of propositional calculus and predicate calcu...

Another update . Red meat doesn ’ t kill you , but the spin is fascinating

© Colquhoun This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and redistribution in any medium, provided that the original author and source are credited. The latest news: eating red meat doesn't do any harm. But why isn't that said clearly? Alarmism makes better news, not only for journalists...