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"Dean, Mark"
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Revealed Preference, Rational Inattention, and Costly Information Acquisition
Apparently mistaken decisions are ubiquitous. To what extent does this reflect irrationality, as opposed to a rational trade-off between the costs of information acquisition and the expected benefits of learning? We develop a revealed preference test that characterizes all patterns of choice \"mistakes\" consistent with a general model of optimal costly information acquisition and identify the extent to which information costs can be recovered from choice data.
Journal Article
Purely electronic insulator-metal transition in rutile VO2
Volatile resistive switching in neuromorphic computing can be tuned by external stimuli such as temperature or electric-field. However, this type of switching is generally coupled to structural changes, resulting in slower reaction speed and higher energy consumption when incorporated into an electronic device. The vanadium dioxide (VO
2
), which has near room temperature metal-insulator transition (MIT), is an archetypical volatile resistive switching system. Here, we demonstrate an isostructural MIT in an ultrathin VO
2
film capped with a photoconductive cadmium sulfide (CdS) layer. Transmission electron microscopy, resistivity experiments, and first-principles calculations show that the hole carriers induced by CdS photovoltaic effect are driving the MIT in rutile VO
2
. The insulating-rutile VO
2
phase has been proved and can remain stable for hours. Our finding provides a new approach to produce purely electronically driven MIT in VO
2
, and widens its applications in fast-response, low-energy neuromorphic devices.
Previous work has shown that electronic and structural transitions in VO
2
can be decoupled by realizing an electronic transition within a monoclinic phase. Here, the authors extend this to the rutile phase by demonstrating a photodoping-driven transition from an insulating to a metallic rutile phase.
Journal Article
Developing industrial policy for manufacturing electrical vehicles
Global automotive manufacturing is dominated by the production of vehicles with internal combustion engines (ICEs). Dozens of countries produce ICE vehicles or components, participating in international supply chains that make millions of cars, trucks, buses, and other vehicles annually. In adapting to climate change, however, global automotive manufacturing is rapidly transitioning to the production of electric vehicles (EVs).
Journal Article
All-star Batman. Vol. 2, Ends of the earth
\"Join Scott Snyder and his frequent collaborator Jock (BATMAN: THE BLACK MIRROR) as they plunge into the icy heart of darkness with Mr. Freeze. Eat the forbidden fruit offered by the sinister and seductive Poison Ivy in a tale illustrated by Tula Lotay (BODIES). Take a journey to the far side of sanity with the Mad Hatter through art by comics superstar Giuseppe Camuncoli (BATMAN: EUROPA). Then, finally, the demonic mind behind these master criminals' apocalyptic ambitions is revealed ... He is Gotham City's guardian. He is the Justice League's Dark Knight. He is Batman, one of the most iconic characters in history. But without his equally classic foes, his legend would be incomplete.\"-- Provided by publisher.
Book
Resolving length-scale-dependent transient disorder through an ultrafast phase transition
Material functionality can be strongly determined by structure extending only over nanoscale distances. The pair distribution function presents an opportunity for structural studies beyond idealized crystal models and to investigate structure over varying length scales. Applying this method with ultrafast time resolution has the potential to similarly disrupt the study of structural dynamics and phase transitions. Here we demonstrate such a measurement of CuIr
2
S
4
optically pumped from its low-temperature Ir-dimerized phase. Dimers are optically suppressed without spatial correlation, generating a structure whose level of disorder strongly depends on the length scale. The redevelopment of structural ordering over tens of picoseconds is directly tracked over both space and time as a transient state is approached. This measurement demonstrates the crucial role of local structure and disorder in non-equilibrium processes as well as the feasibility of accessing this information with state-of-the-art XFEL facilities.
Tracking local material structure at picosecond timescales is realized using XFEL facilities. This pair distribution function measurement tracks the redevelopment of structural order through a non-equilibrium transition.
Journal Article
X-men reload. Vol. 1, The end of history
\"The team is reborn with a proactive new mission, new alliances are formed and old friendships are rekindled - but the X-Men's world remains as deadly as ever!\"--Page 4 of cover.
BOOK
Rational Inattention, Optimal Consideration Sets, and Stochastic Choice
We unite two basic approaches to modelling limited attention in choice by showing that the rational inattention model implies the formation of consideration sets—only a subset of the available alternatives will be considered for choice. We provide necessary and sufficient conditions for rationally inattentive behaviour which allow the identification of consideration sets. In simple settings, chosen options are those that are best on a stand-alone basis. In richer settings, the consideration set can only be identified holistically. In addition to payoffs, prior beliefs impact consideration sets. Linear inequalities identify all priors consistent with each possible consideration set.
Journal Article