Results 141 to 150 of about 67,376,609 (305)
Estimation of Efficiency with the Stochastic Frontier Cost Function and Heteroscedasticity: A Monte Carlo Study [PDF]
The objective of this article is to address heteroscedasticity in the stochastic frontier cost function using aggregated data and verify it using a Monte Carlo study.
Kenkel, Philip L. +2 more
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Bridging Biosensing and Hardware‐Level Data Security With a Conjugated Radical Polymer
Advanced Materials, EarlyView.A conjugated radical polymer provides two complementary functions within a common material platform: sensitive dopamine biosensing and device‐specific stochastic electrical responses for security. The work demonstrates a materials‐based approach for combining bioelectronic signal acquisition with hardware‐level authentication while maintaining the ...
Hoyeon Lee +9 more
wiley +1 more source
Spatiotemporal optical vortex combs
Nature CommunicationsSingle-packet spatiotemporal optical vortices (STOVs) with transverse orbital angular momentum (OAM) have recently garnered significant attentions. Nevertheless, more advanced applications require diverse transverse OAM modes and multiple STOV wave ...
Fu Feng +9 more
doaj +1 more source
Productivity of Nations: a stochastic frontier approach to TFP decomposition [PDF]
This paper tackles the problem of aggregate TFP measurement using stochastic frontier analysis (SFA). Data from Penn World Table 6.1 are used to estimate a world production frontier for a sample of 75 countries over a long period (1950-2000) taking ...
Jorge Oliveira Pires, Fernando Garcia
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Giant Anisotropic Spin Absorption in Chiral Hybrid Semiconductors
Advanced Materials, EarlyView.Researchers uncover that chiral hybrid organic–inorganic semiconductors absorb spin differently depending on its polarization direction. This anisotropic spin absorption is primarily driven by the local symmetry breaking within the layered structure.
Cong Yang +12 more
wiley +1 more source
Education externalities in rural Ethiopia: evidence from average and stochastic frontier production functions. [PDF]
Education will have externality effects in agriculture if, in the course of conducting their own private economic activities, educated farmers raise the productivity of uneducated farmers with whom they come into contact.
John Knight, Sharada Weir
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Phase‐Engineered MoS2 Quantum Monolayer Catalysts
Advanced Materials, EarlyView.A new type of catalyst model—phase‐engineered MoS2 quantum‐monolayer catalyst (∼0.8 nm thick, < 6 nm in the lateral size; switchable freely among metallic 1T, semiconducting 2H, and a hybrid phase of metallic‐semiconducting 1T‐2H)—is reported. It can efficiently and stably drive photochemical H2, syngas and ammonia synthesis as a catalyst or co ...
Ruijie Yang +12 more
wiley +1 more source
Advanced Materials, EarlyView.Ionic cocrystal‐programmed ionic organization establishes a general strategy for electrostatic programming in polymeric photocatalysts. ABSTRACT Controlling the spatial organization of ions in polymeric photocatalysts remains a fundamental challenge for optimizing charge transport and catalytic selectivity in solar‐driven hydrogen peroxide (H2O2 ...
Anna Lo Presti +6 more
wiley +1 more source
Research Efficiency in Manufacturing: An Application of DEA at the Industry Level [PDF]
This paper analyzes research efficiency at the industry level in manufacturing for 13 European member and four nonmember countries during 2000 and 2004. A unique dataset was compiled that matches patent applications at the European Patent Office (EPO) to
Petra Zloczysti, Jens Schmidt-Ehmcke
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Health services research in mental health: The next frontier?
, 2020 Health services research in mental health: The next ...
Michael Berk (13060851)
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