Results 101 to 110 of about 465,894 (329)

Opaiţe plastice descoperite la Durostorum–Ostrov (Ferma 4) [PDF]

open access: yesPeuce, 2017
The Lower Danube Museum of Călărași houses over 1400 Roman lamps, most of them discovered by the author of this paper during field research and preventive or systematic excavations made within the territory of the civil settlement of Durostorum (Ostrov ...
Dan ELEFTERESCU
doaj  

A Group of Bronze Lamps from Demre Museum [PDF]

open access: yesPhaselis: Disiplinlerarası Akdeniz Araştırmaları Dergisi
: This study examines 12 copper alloy oil lamps in Demre Museum, which were identified as bronze due to the lack of chemical analysis. Three of the oil lamps (Cat. No. 1, Cat. No. 4 and Cat. No.
Ünal Demirer
doaj   +1 more source

Pengaruh Distorsi Harmonik pada Compact Fluorescent Lamps [PDF]

open access: yes, 2016
Compact Fluorescent Lamps (CFL) are one of the non-linear load which depicts distorted wave containing harmonics. Harmonics are integer multiplication periodically of the fundamental frequency.
Christian, C. (Christian)   +2 more
core  

Defects Dynamic in Photo‐Excited CeO2 and their Influence on CO2 Photoreduction

open access: yesAdvanced Functional Materials, EarlyView.
X‐ray photoelectron spectroscopy study under light excitation is presented to track the defect dynamic (Ce4+ to Ce3+) in CeO2. Surface enhanced Raman spectroscopy confirmed the key role of Ce3+ states in controlling charge and energy transfer across the CeO2‐dye molecule interface.
Rambabu Yalavarthi   +3 more
wiley   +1 more source

Intermittent accreting millisecond pulsars: light houses with broken lamps? [PDF]

open access: yes, 2008
Intermittent accreting millisecond X-ray pulsars are an exciting new type of sources. Their pulsations appear and disappear either on timescales of hundreds of seconds or on timescales of days. The study of these sources add new observational constraints
Alessandro Patruno   +9 more
core   +3 more sources

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

open access: yesAdvanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang   +10 more
wiley   +1 more source

Small, efficient power supply for xenon lamps [PDF]

open access: yes, 1970
Device, which operates from 28 V dc, has four sections, a preregulator, a dc-to-dc converter, a current regulator, and a high voltage starter.
Goodwin, J. E.
core   +1 more source

Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr3 Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting

open access: yesAdvanced Functional Materials, EarlyView.
The combination of formamidinium thiocyanate and 1,3‐propane diammonium iodide for bulk and top‐surface passivation, and a ternary fullerene blend to improve energy band alignment, suppresses energy losses in wide‐bandgap FAPbBr3 perovskite solar cells.
Laura Bellini   +9 more
wiley   +1 more source

Luminance Analysis of Linear Fluorescent Lamp [PDF]

open access: yes, 2015
My paper deals with theme of luminance analysis. The aim of the paper is to find out how change luminance of linear fluorescent lamps with the change of light source position.
Štěpánek, J.
core  

Electrochemical Formation of BiVO4/BiPO4 Photoanodes for Enhanced Selectivity toward H2O2 Generation

open access: yesAdvanced Functional Materials, EarlyView.
In acidic KPi, V dissolves from the BiVO4 lattice, while adsorbed phosphate reacts with the electrode under an external bias, forming a BiPO4 surface layer. This BiPO4 layer exhibits stronger bicarbonate adsorption, redirecting the water oxidation pathway toward two‐electron H2O2 production.
Kaijian Zhu   +12 more
wiley   +1 more source

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