Results 91 to 100 of about 184,612 (304)
Arthritis Care &Research, EarlyView.Objective Relapsing polychondritis (RP) is a rare disease defined by recurrent cartilaginous inflammation. Anti–collagen II (Col2) antibodies have been proposed as a diagnostic biomarker for RP, but their performance characteristics are not well defined.
Karyssa Stonick +6 more
wiley +1 more source
Analysis of the influence of selected non-linear devices on the waveform of supply voltage
ITM Web of Conferences, 2018 The paper presents research on the influence of selected non-linear devices on the shape of supply voltage. It has been assessed how current distortion, expressed by THDI, and rms current ‖i‖ influence voltage distortion, represented by THDU.
Bartman Jacek, Sobczyński Dariusz
doaj +1 more source
Three phase boost rectifier design [PDF]
, 2012 An electric power can be converted from one form to another form by using power electronics devices. The function of power electronics circuits by using semiconductor devices as switch is modifying or controlling a voltage.
Saher, Rohaizan
core
Analysis of VCO based noise shaping ADCs linearized by PWM modulation [PDF]
, 2012 Nonlinearity is one of the main problems associated with VCO based noise shaping ADCs. Their open loop architecture does not permit correction of the nonlinear voltage to frequency response of the VCO by feedback.
Hernandez, Luis +3 more
core +2 more sources
Retractions in Rheumatology: Trends, Causes, and Implications for Research Integrity
Arthritis Care &Research, EarlyView.Objective We aimed to describe the trends and main reasons for study retraction in rheumatology literature. Methods We reviewed the Retraction Watch database to identify retracted articles in rheumatology. We recorded the main study characteristics, authors’ countries, reasons for retraction, time from publication to retraction, and trends over time ...
Anna Maria Vettori, Michele Iudici
wiley +1 more source
An Analysis of Voltage Quality in a Nanogrid during Islanded Operation
Energies, 2019 Voltage quality data has been collected in a single house nanogrid during 48 weeks of islanded operation and 54 weeks of grid-connected operation. The voltage quality data contains the voltage total harmonic distortion (THD), odd harmonics 3 to 11 and 15,
Jakob Nömm +2 more
doaj +1 more source
Comparitive study of the influence of harmonic voltage distortion on the efficiency of induction machines versus line start permanent magnet machines [PDF]
, 2012 Induction machines have nearly reached their maximal efficiency. In order to further increase the efficiency the use of permanent magnets in combination with the robust design of the induction machine is being extensively researched. These so-called line
Debruyne, Colin +3 more
core
Harmonic distortion in public low-voltage grids Comparison of the situation in Colombia and Germany
Ingeniería e Investigación, 2015 Current and voltage harmonic levels in LV grids depend not only on the harmonic emission of non-linear loads, but also on the characteristics of the grid and the voltage distortion of the upstream grid.
Ana María Blanco Castañeda +5 more
doaj +1 more source
Arthritis Care &Research, EarlyView.Objective This study aimed to investigate potential moderators influencing the effects of manual therapy and exercise therapy on pain and functional outcomes in individuals with knee and/or hip osteoarthritis, using data from the MOA trial. This is a secondary analysis of data from the MOA trial that compares the clinical effectiveness of manual ...
Daniel Cury Ribeiro +2 more
wiley +1 more source
THE REDUCTION OF TOTAL HARMONIC DISTORTION FOR THE MULTILEVEL CONVERTER USING GENETIC ALGORITHMS OPTIMIZATION METHOD [PDF]
Carpathian Journal of Electrical Engineering, 2018 Electricity, DC voltage – AC voltage, conversion generated from certain renewable energy sources such as photovoltaic panels should be made with quality factors imposed by the present standards.
Horatiu Dacian LASLO, Traian VARODI
doaj