Results 161 to 170 of about 6,159,557 (351)

Do conflicts create poverty traps? Asset losses and recovery for displaced households in Colombia [PDF]

open access: yes
Internal conflicts entail large asset losses for certain segments in the civilian population. Asset losses may compromise the future welfare of households, thus leaving a legacy of structural poverty that is difficult to overcome.
Ana María Ibáñez, Andrés Moya
core  

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

open access: yesAdvanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah   +11 more
wiley   +1 more source

"The Trouble with Pensions: Toward an Alternative Public Policy to Support Retirement" [PDF]

open access: yes
Pension funds have taken a big hit during the current financial crisis, with losses in the trillions of dollars. In addition, both private and public pensions are experiencing significant funding shortfalls, as is the government-run Pension Benefit ...
L. Randall Wray, Yeva Nersisyan
core  

Spectrally Tuned Floating‐Gate Synapse Based on Blue‐ and Red‐Absorbing Organic Molecules for Wavelength‐Selective Neural Networks and Fashion Image Classifications

open access: yesAdvanced Functional Materials, EarlyView.
The characteristics of a vertical floating gate heterostructure transistor device that exhibits neuromorphic potentiation under visible light illumination are investigated. Due to spectrally‐tuned absorbance properties of each thin film layer and introduction of tunneling dielectric, the device enables wavelength‐selective tuning of synaptic plasticity
Seungme Kang   +12 more
wiley   +1 more source

Analysis of regolith electromagnetic scattering as constrained by high resolution Earth-based measurements of the lunar microwave emission [PDF]

open access: yes
When high resolution measurements of the phase variation of the lunar disk center brightness temperature revealed that in situ regolith electrical losses were larger than those measured on returned samples by a factor of 1.5 to 2.0 at centimeter ...
Keihm, S. J.
core   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

open access: yesAdvanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero   +12 more
wiley   +1 more source

Implementation of a compact diplexer based on a modified T-shaped step-impedance resonator (MTSIR) for 5G networks. [PDF]

open access: yesSci Rep
Hazzazi F   +7 more
europepmc   +1 more source

Calculating Value-at-Risk [PDF]

open access: yes
The market risk of a portfolio refers to the possibility of financial loss due to the joint movement of systematic economic variables such as interest and exchange rates.
William Fallon
core  

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