A Classification Method for Power-Quality Disturbances Using Hilbert–Huang Transform and LSTM Recurrent Neural Networks

Miguel Angel Rodriguez,John Felipe Sotomonte,Jenny Cifuentes,Maximiliano Bueno-López 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1

Power quality disturbances are one of the main problems in an electric power system, where deviations in the voltage and current signals can be evidenced. These sudden changes are potential causes of malfunctions and could aff ect equipment performance at diff erent demand locations. For this reason, a classifi cation strategy is essential to provide relevant information related to the occurrence of the disturbance. Nevertheless, traditional data extraction and detection methods have failed to carry out the classifi cation process with the performance required, in terms of accuracy and effi ciency, due to the presence of a non-stationary and non-linear dynamics, specifi c of these signals. This paper proposes a hybrid approach that involves the implementation of the Hilbert–Huang Transform (HHT) and long short-term memory (LSTM), recurrent neural networks (RNN) to detect and classify power quality disturbances. Nine types of synthetic signals were reproduced and pre-processed taking into account the mathematical models and their specifi cations established in the IEEE 1159 standard. In order to eliminate the presence of mode mixing, the ensemble empirical decomposition (EEMD) and masking signal methods were implemented. Additionally, based on the successful benefi ts of LSTM RNNs reported in the literature, associated to the high accuracy rates achieved at learning long short-term dependencies, this classifi cation technique is implemented to analyze the sequences obtained from the HHT. Based on the experimental results, it is possible to show that the ensemble recognition approach using the EEMD yields a better classifi cation accuracy rate (98.85%) compared with the masking signal and the traditional HHT approach

Carbon Storage Regulator A (csrA) Gene Regulates Motility and Growth of Bacillus licheniformis in the Presence of Hydrocarbons

Angel, Laura Iztacihuatl Serrano,Segura, Daniel,Jimenez, Jeiry Toribio,Barrera, Miguel Angel Rodriguez,Pineda, Carlos Ortuno,Ramirez, Yanet Romero The Korean Society for Microbiology and Biotechnol 2020 한국미생물·생명공학회지 Vol.48 No.2

The global carbon storage regulator (Csr) system is conserved in bacteria and functions as a regulator in the exponential and stationary phases of growth in batch culture. The Csr system plays a role in the central carbon metabolism, virulence, motility, resistance to oxidative stress, and biofilm formation. Although the Csr was extensively studied in Gram negative bacteria, it has been reported only in the control of motility in Bacillus subtilis among Gram positive bacteria. The goal of this study was to explore the role of the csrA gene of Bacillus licheniformis M2-7 on motility and the bacterial ability to use hydrocarbons as carbon source. We deleted the csrA gene of B. licheniformis M2-7 using the plasmid pCsr-L, harboring the spectinomycin cassette obtained from the plasmid pHP45-omega2. Mutants were grown on culture medium supplemented with 2% glucose or 0.1% gasoline and motility was assessed by electron microscopy. We observed that CsrA negatively regulates motility by controlling the expression of the hag gene and the synthesis of flagellin. Notably, we showed the ability of B. licheniformis to use gasoline as a unique carbon source. Our results demonstrated that CsrA is an indispensable regulator for the growth of B. licheniformis M2-7 on gasoline.

A rare case of choledochal cyst with pancreas divisum

Adrian Ransom-Rodriguez,Ruben Blachman-Braun,Emilio Sanchez-Garcia Ramos,Jesus Varela-Prieto,Erick Rosas-Lezama,Miguel Angel Mercado 한국간담췌외과학회 2017 Annals of hepato-biliary-pancreatic surgery Vol.21 No.1

Choledochal cysts are rare congenital malformations of the bile duct characterized by dilatations of the intrahepatic and/or extrahepatic portion of the biliary tree, they are associated to an anomalous arrangement of the pancreaticobiliary duct. Pancreas divisum results from a fusion failure of the pancreatic buds. The coexistence of pancreas divisum and choledochal cyst in adults has been reported in less than 10 well documented cases. This article presents a case of a 42-year-old Peruvian man with intermittent episodes of abdominal pain, initially diagnosed with choledocholithiasis, who underwent open cholecystectomy. During surgery, a diagnosis of choledochal cyst and pancreas divisum was made, and therefore a hepaticoduodenostomy was performed. The patient was referred to our hospital due to persistence of abdominal pain. After admission, a papillectomy was achieved without further complications. A cyst resection and dismantling of hepaticoduodenostomy with Roux-en-Y was performed 8 years later. During the subsequent 18-month follow-up, the patient remains asymptomatic.

Oral findings and its association with prenatal and perinatal factors in newborns

Perez-Aguirre, Brenda,Soto-Barreras, Uriel,Loyola-Rodriguez, Juan Pablo,Reyes-Macias, Juan Francisco,Santos-Diaz, Miguel Angel,Loyola-Leyva, Alejandra,Garcia-Cortes, Obed The Korean Pediatric Society 2018 Clinical and Experimental Pediatrics (CEP) Vol.61 No.9

Purpose: This study aimed to determine the frequency of abnormalities in the newborn oral cavity and to evaluate the association with prenatal and perinatal factors. Methods: This cross-sectional study evaluated 2,216 newborns. Oral findings were assessed in the first 24 hours of life using visual examination. Sex, weight, length, gestational age, and medical disorders at birth were recorded. Maternal demographic and medical information was also obtained. Results: The most common oral findings were Bohn's nodules, Epstein's pearls, and dental lamina cysts. Other intraoral findings included odontogenic cysts, ankyloglossia, and natal teeth, among others. In logistic regression analyses, folic acid consumption during pregnancy was significantly associated with Bohn's nodules (odds ratio [OR], 1.79; 95% confidence interval [CI], 1.23-2.55; P=0.002), Epstein's pearls (OR, 1.63; 95% CI, 1.14-2.33; P=0.007), and dental lamina cysts (OR, 1.45; 95% CI, 1.02-2.05; P=0.038). Moreover, preterm births were negatively associated with prevalence of Bohn's nodules (OR, 0.63; 95% CI, 0.50-0.80; $P{\leq}0.0001$). Comparison between newborns with and without oral inclusion cysts showed that maternal folic acid and iron intake were significantly different (P<0.05). Conclusion: Maternal folic acid and iron intake were associated with the prevalence of oral inclusion cysts.

Oral findings and its association with prenatal and perinatal factors in newborns

Brenda Perez-Aguirre,Uriel Soto-Barreras,Juan Pablo Loyola-Rodriguez,Juan Francisco Reyes-Macias,Miguel Angel Santos-Diaz,Alejandra Loyola-Leyva,Obed Garcia-Cortes 대한소아청소년과학회 2018 Clinical and Experimental Pediatrics (CEP) Vol.61 No.9

Purpose: This study aimed to determine the frequency of abnormalities in the newborn oral cavity and to evaluate the association with prenatal and perinatal factors. Methods: This cross-sectional study evaluated 2,216 newborns. Oral findings were assessed in the first 24 hours of life using visual examination. Sex, weight, length, gestational age, and medical disorders at birth were recorded. Maternal demographic and medical information was also obtained. Results: The most common oral findings were Bohn’s nodules, Epstein’s pearls, and dental lamina cysts. Other intraoral findings included odontogenic cysts, ankyloglossia, and natal teeth, among others. In logistic regression analyses, folic acid consumption during pregnancy was significantly associated with Bohn’s nodules (odds ratio [OR], 1.79; 95% confidence interval [CI], 1.23–2.55; P=0.002), Epstein’s pearls (OR, 1.63; 95% CI, 1.14–2.33; P=0.007), and dental lamina cysts (OR, 1.45; 95% CI, 1.02–2.05; P=0.038). Moreover, preterm births were negatively associated with prevalence of Bohn’s nodules (OR, 0.63; 95% CI, 0.50–0.80; P≤0.0001). Comparison between newborns with and without oral inclusion cysts showed that maternal folic acid and iron intake were significantly different (P<0.05). Conclusion: Maternal folic acid and iron intake were associated with the prevalence of oral inclusion cysts.

Poster Session : PS 0414 ; Infectious Disease ; Hydatid Cyst. Case Report

( Hector Raul Ibarra Sifuentes ),( Camilo Daniel Gonzalez Velazquez ),( Claudia Paola Rivera Uribe ),( Francisco Gonzalo Rodriguez Garcia ),( Roberto Monreal Robles ),( Miguel Angel Villareal Alarcon 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1

A 47-year-old female was admitted to emergency room due to dyspnea hypotension and stupor. Medical history of sulfonamide allergy, Hemolymphangioma diagnosed and treated with thoracic laminectomy. She was healthy until 15 days before admission. She began with dyspnea, triggered by postural changes, increasingly severe. Three days later, nausea, fever and night sweats were added to the initial symptoms; fi ve days prior to admission fatigue, weakness, and pulsatile headache began. finally, she presented discomfort, acute loss of consciousness and was admitted to our hospital. At arrival, her vitals were BP 90/50 mmHg, HR 124 bpm, RR 32 bpm, SO2 80% ambient air. She presented diffi culty breathing, audible inspiratory stridor and stupor. Endotracheal intubation was performed. Bilateral expiratory wheezing was found, rest of physical examination was unremarkable. Chest radiography showed no infi ltrates, and properly positioned endotracheal tube; hemoglobin 18.2 g/dl, WBC 14.2 k/ l, neutrophil 13.5 k/ l, platelets 196 k/ l, glucose 104 mg/dl, BUN 17 mg/dl, creatinine 1.1 mg/dl, albumin 3.1 g/dl, AST 74 IU/L, ALT 36 IU/L, FA 60 IU/L, bilirubin 0.9 mg/dl. Salbutamol, Hydrocortisone and Norepinephrine were administered to treat anaphylactic shock. Lumbar puncture was performed and reported as normal; Troponin-I and D-dimer were reported high, pulmonary Angio-CT was preformed, in search of a probable pulmonary embolism, reported normal. Ventilator support was discontinued after evidence of ventilatory recovery. Next morning she had urticarial episode, resolved with loratadine. On Angio-CT we observe a hint of a hepatic lesion. Abdominal ultrasound found a cystic lesion 7.7 x 7.3 x 5.5 cm, visible wall with anechoic content; hydatid cyst CE3a, according to WHO classifi cation is diagnosed. Albendazole 400 mg BID, was administered; ELISA IgG vs Echinococcus granulosus reported positive. She was discharged and staffed in outpatient follow-up during 3 months.