Results 81 to 90 of about 4,688 (220)

Modeling and Simulation of Closed Loop Controlled Parallel Cascaded Buck Boost Converter Inverter Based Solar System

, 2015
This Work deals with design, modeling and simulation of parallel cascaded buck boost converter inverter based closed loop controlled solar system. Two buck boost converters are cascaded in parallel to reduce the ripple in DC output. The DC from the solar
Sundar, T., Sankar, S., T. Sundar, S. Sankar   +3 more
core   +1 more source

Doubly grounded buck‐boost PV grid‐connected inverter without shoot‐through problem

Electronics Letters
Transformerless grid‐connected inverters (GCIs) are universally utilized in the PV system. However, they have the shoot‐through issue and common mode leakage current (CMLC).
Zhilei Yao, Ximing Zhang, Changlei Shan
doaj   +1 more source

Single-Stage Single-Phase Isolated Full-Bridge Buck–Boost DC–AC Inverters

IEEE Open Journal of Industry Applications
This article presents a simple high-frequency transformer (HFT) isolated buck–boost inverter designed for single-phase applications. The proposed HFT isolated inverter, with its full-bridge buck–boost topology, provides a wider voltage ...
Usman Ali Khan, Ashraf Ali Khan, Jung-Wook Park   +2 more
doaj   +1 more source

Economic inequality and social mobility in preindustrial societies: What we know, what we don't (but should) know

The Economic History Review, EarlyView.
Abstract In recent years economic inequality has become a major research topic in economic history. However, much remains to be done to complete our knowledge of long‐term distributive dynamics. This article highlights several promising avenues for future research, focusing on the preindustrial period.
Guido Alfani
wiley   +1 more source

Micro Inverter Grid Connected for PV Application Based on SEPIC Differential Inverter [PDF]

SVU-International Journal of Engineering Sciences and Applications
The problem of shading in photovoltaic systems has occupied a large part of the researchers' interests, and for this reason, the Micro-inverter (MI) is used as the solution, and the idea of manufacturing them depends on installing a small inverter with a
Mohamed Ismeil, Hany S. Hussein, Mahmoud Nasrallah   +2 more
doaj   +1 more source

Enhancement of Motor Skill Development in Dental Education Through an Art‐Based Course, Including the COVID‐19 Period

European Journal of Dental Education, EarlyView.
ABSTRACT Background Modern higher education requires a redefinition of pedagogical objectives to meet the evolving cognitive and perceptual demands of contemporary students. One such emerging objective is the cultivation of visual perceptions. Generational differences suggest that current students possess distinct cognitive profiles and learning ...
Adrienne Fazekas, Balazs Sandor, Gyula Marada, Timea Dergez, Krisztian Katona, Andrea Radacsi, Michael Rakan Haddad, Ildiko Szanto   +7 more
wiley   +1 more source

Unprincipled Principals in the Accountability Chain: Autonomy and Political Control Within Tax Administration in a Developing Country Context

Financial Accountability &Management, EarlyView.
ABSTRACT SDG 16 emphasizes the need for accountable institutions, often based on the assumption that public officials are accountable to politicians, who in turn are accountable to citizens. However, in many developing countries, neopatrimonial governance can weaken this accountability chain, as politicians themselves may act as “unprincipled ...
Edidiong Bassey, Emer Mulligan
wiley   +1 more source

Single Phase Transformer-less Buck-Boost Inverter with Zero Leakage Current for PV Systems

, 2017
In this paper, a novel single-stage single-phase transformer-less buck-boost inverter is proposed, in which a reduced number of passive components is used.
Ali Mostaan, N. Soltani, Mohsen; id_orcid, Mohsen Soltani, Mostaan, Ali, Ahmed Abdelhakim, Abdelhakim, Ahmed, Blaabjerg, Frede; id_orcid, Frede Blaabjerg   +7 more
core   +1 more source

To Grandmother's House We Go: Informal Childcare and Female Labor Mobility

International Economic Review, EarlyView.
ABSTRACT We document how childcare costs and the location of extended family influence the labor supply and mobility of US women. Women return to their home locations immediately before fertility events, suggesting that informal childcare needs may motivate home migration. Women who live near their parents have lower child earnings penalties.
Garrett Anstreicher, Joanna Venator
wiley   +1 more source

Novo conversor CC-CA elevador-abaixador de tensão [PDF]

, 2013
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2013Esta tese apresenta uma nova topologia para os conversores CC-CA, que possibilita obter uma tensão ...
Piazza, Gleyson Luiz
core