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Ricardo Martínez-Alvarado,Everardo Efrén Granda-Gutiérrez,Alejandra Hernández-Rodríguez,Rolando Javier Praga-Alejo 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.10
A pulse classification technique for monitoring the type of discharges in an electrochemical discharge machining (ECDM) process is presented in this research paper. The performance of an ECDM process is affected by many factors which make it hard for control strategies to be formulated for this process. The pulse classifier plays an important role to develop control strategies and later to improve the process. The proposed system uses the current and voltage waveforms measured through the gap as input signals for the classification system. A fuzzy inference system (FIS) is used to categorize both input signals into one of the four proposed pulse types, according to their specific behavior. For the experimental validation, data samples taken during the machining process were recorded to evaluate the performance of the pulse classifier with raw data. Raw data of the gap signals is properly classified based on the proposed FIS.
Cell-Assisted Lipotransfer for the Treatment of Parry-Romberg Syndrome
Castro-Govea, Yanko,De La Garza-Pineda, Oscar,Lara-Arias, Jorge,Chacon-Martinez, Hernan,Mecott-Rivera, Gabriel,Salazar-Lozano, Abel,Valdes-Flores, Everardo Korean Society of Plastic and Reconstructive Surge 2012 Archives of Plastic Surgery Vol.39 No.6
Progressive facial hemiatrophy, also known as Parry-Romberg syndrome, is a progressive and self-limited deformation of the subcutaneous tissue volume on one side of the face that creates craniofacial asymmetry. We present the case of a patient with a five-year history of progressive right facial hemiatrophy, who underwent facial volumetric restoration using cell-assisted lipotransfer (CAL), which consists of an autologous fat graft enriched with adipose-derived stem cells (ASCs) extracted from the same patient. ASCs have the capacity to differentiate into adipocytes. They also promote angiogenesis, release angiogenic growth factors, and some can survive as stem cells. The use of autologous fat as a filler in soft tissue atrophy has been satisfactory in patients with mild and moderate Parry-Romberg syndrome. Currently, CAL has showed promising results in the long term by decreasing the rate of fat reabsorption. The permanence and stability of the graft in all the injected areas has showed that autologous fat grafts enriched with stem cells could be a promising technique for the correction of defects caused by this syndrome.