Results 91 to 100 of about 50,327,648 (262)

Regional Tourism Competition in the Baltic States: a Spatial Stochastic Frontier Approach [PDF]

open access: yes
This paper aimed at a statistical analysis of competition for tourists between regions within Baltic states (Estonia, Latvia, Lithuania) and estimation relative efficiency levels of regions.
Pavlyuk, Dmitry
core  

Frontier warfare: a series of ten lectures [PDF]

open access: yes, 1910
The book is a series of the following ten tecture: General Principles; Frontier warfare camp; Measures for the security of a camp; Picquests protecting a camp; Marches; Protection on the march; Attack - defence - storming a fort; Pursuits and retreats ...
Frontier,
core   +1 more source

Tetracyclic π‐Extended Multi‐Resonant TADF Emitters for Green PSF‐OLEDs With 37.7% EQE and BT.2020‐Compatible Top‐Emitting Devices

open access: yesAdvanced Functional Materials, EarlyView.
Ultra‐narrow green multi‐resonance thermally activated delayed fluorescence emitters have been developed by linear π‐extension strategy using tetracyclic naphtho[2,3‐b]benzofuran unit. The resulting phosphorescence‐sensitized OLEDs achieve a maximum external quantum efficiency of 37.7% in the bottom‐emitting architecture, while the complementary top ...
Eo Jin Jeon   +7 more
wiley   +1 more source

Productivity of Nations: a stochastic frontier approach to TFP decomposition [PDF]

open access: yes
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
core  

Direct observation of intra-grain defect formation during local solid-phase epitaxy

open access: yesScientific Reports
Despite relentless efforts to improve fabrication processes, the achievement of a defect-free polycrystalline film (poly-film) through solid-phase crystallization (SPC) remains challenging, as evidenced by structural analyses.
Manabu Tezura   +5 more
doaj   +1 more source

Donor‐Engineered Chiral Indium–Salen Complexes for Tunable Circularly Polarized Luminescence

open access: yesAdvanced Functional Materials, EarlyView.
Chiral indium–salen complexes bearing electronically and structurally diverse donor substituents are presented as modular main‐group luminophores exhibiting tunable blue‐to‐green circularly polarized luminescence. Donor engineering systematically controls frontier‐orbital distribution, intraligand charge transfer, and excited‐state relaxation ...
Haein Kim   +14 more
wiley   +1 more source

Nonparametric Frontier Estimation from Noisy Data [PDF]

open access: yes
A new nonparametric estimator of production a frontier is defined and studied when the data set of production units is contaminated by measurement error. The measurement error is assumed to be an additive normal random variable on the input variable, but
Van Bellegem, Sébastien   +2 more
core   +2 more sources

Pressure‐Assisted Dimensional Transformation of 2D Hydrogenated Borophene into 0D Boron Quantum Dots

open access: yesAdvanced Functional Materials, EarlyView.
Hydrogenated borophene (HB) is transformed into distinct boron nanostructures through a solvent‐free thermal process. Under flowing nitrogen, hydrogen escape promotes reconstruction into B2O3 nanoplatelets, whereas hydrogen‐induced pressure under sealed conditions facilitates fragmentation into boron quantum dots.
Ozden Gunes Yildiz   +11 more
wiley   +1 more source

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