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Comparative analysis for reactive energy measurement methodologies, under non-sinusoidal conditions in three-phase four-wire circuits
(2011-12-28)
This paper presents some methodologies for reactive energy measurement, considering three modern power theories that are suitable for three-phase four-wire non-sinusoidal and unbalanced circuits. The theories were applied ...
Electric field and magnetometer observations of the equatorial electrojet: An IEEY program
(Instituto Geofísico del Perú, Radio Observatorio de Jicamarca, 1994)
As part of the IEEY program, a chain of magnetometers was deployed along the Peruvian sector crossing the equatorial electrojet. Simultaneous vertical drift measurements were made using Jicamarca's normal I.S. F-region ...
Long‐duration penetration of the interplanetary electric field to the low‐latitude ionosphere during the main phase of magnetic storms
(American Geophysical Union, 2005-11-26)
It is well known that the interplanetary electric field can penetrate to the low‐latitude ionosphere. It is generally believed that the penetration of electric fields can last only for ∼30 min because of the shielding ...
Método para análise de eficiência energética
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilDepartamento Acadêmico de ElétricaEngenharia ElétricaUTFPR, 2019-06-28)
Given the need of alternatives to the growing energetic demand, the energetic efficiency comes as an immediate alternative, cheap, causing no damage to the environment. Despite its attractiveness, it isn’t enough make ...
Ação de eficiência energética em fornos de fusão: Um estudo de caso
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilDepartamento Acadêmico de MecânicaEngenharia MecânicaUTFPR, 2019-03-21)
This paper presents a case study carried out in a metal-mechanic foundry company. It highlights researches related with energy consumption in melting furnaces, focused on electric induction furnaces and its objective is ...
The oscillatory bioelectrical signal from plants explained by a simulated electrical model and tested using Lempel-Ziv complexity
(ELSEVIER SCI LTD, 2011)
This paper demonstrates the oscillatory characteristics of electrical signals acquired from two ornamental plant types (Epipremnum pinnatum and Philodendron scandens - Family Araceae), using a noninvasive acquisition system. ...
The use of pulsed electric acoustic technique for measuring the polarization reversal in ferroelectric ceramic samples
(2002-01-01)
The pulsed electric acoustic technique, PEA, has been usually applied to probe space charge profiles in polymers. Preliminary PEA results using a ferroelectric ceramic are presented. If the reverse applied electric field ...