Results 71 to 80 of about 169,085 (298)

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

open access: yesAdvanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr   +7 more
wiley   +1 more source

A Wide Input Voltage Range Unidirectional Resonant Switched‐Capacitor Converter for Fuel Cell Applications

open access: yesIET Power Electronics
This paper introduces a full bridge high voltage gain resonant switched capacitor converter (SCC) providing soft switching conditions for all power semiconductors above and below the resonant frequencies.
Sajad Afshar Zarandi   +2 more
doaj   +1 more source

Research on characteristics of bidirectional CLLC DC–DC transformer used in DC microgrid

open access: yesThe Journal of Engineering, 2019
In the DC microgrid system, the energy storage system must have both high power density and high energy density, and it is difficult for a single type of energy storage device to meet this requirement.
Wen Chunxue   +4 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

open access: yesAdvanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska   +7 more
wiley   +1 more source

Power-take-off topology comparison for a wave energy converter

open access: yesThe Journal of Engineering, 2019
Wave Energy Converters (WECs) generally use a Mechanical Power-Take-Off (MPTO) involving hydraulics or gearing to optimise the extraction of energy from the incoming waves before converting it into electrical energy via a high speed rotating generator ...
Stephen P. McDonald   +3 more
doaj   +1 more source

Structural Dynamics Testing of Advanced Stirling Convertor Components [PDF]

open access: yes
NASA Glenn Research Center has been supporting the development of Stirling energy conversion for use in space. Lockheed Martin has been contracted by the Department of Energy to design and fabricate flight-unit Advanced Stirling Radioisotope Generators ...
Oriti, Salvatore M.   +1 more
core   +4 more sources

One-way transparent sheets

open access: yes, 2013
In this paper we introduce the concept of metasurfaces which are fully transparent when looking from one of the two sides of the sheet and have controllable functionalities for waves hitting the opposite side (one-way transparent sheets).
Asadchy, Viktar   +2 more
core   +1 more source

Microcontroller-based peak current mode control using digital slope compensation [PDF]

open access: yes, 2012
Microcontroller-based peak current mode control of a buck converter is investigated. The new solution uses a discrete time controller with digital slope compensation. This is implemented using only a single-chip microcontroller to achieve desirable cycle-
Hallworth, Michael, Shirsavar, Ali
core   +1 more source

Photoswitching Conduction in Framework Materials

open access: yesAdvanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez   +4 more
wiley   +1 more source

A Load‐Independent High‐Frequency Resonant DC‐DC Converter for LED Driver Applications

open access: yesIET Power Electronics
This paper introduces a soft‐switching single‐switch step‐down LED driver. The switch operates under zero voltage switching condition, which eliminates switching losses as well as capacitive turn‐on losses.
Behzad Soleymani   +2 more
doaj   +1 more source

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