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Gualberto Solís-Perales,Jairo Sánchez-Estrada,Ricardo Femat 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.9
This contribution presents a gain adaptation, which allows us to tune a robust asymptotic feedback linearization (RAFL). The gain adaptation allows the RAFL to attenuate the measurement noise sensitivity. The RAFL is considered here because it ensures tracking without prior information about the system’s nonlinearities and parameter bounds. Also, the RAFL only has the system output available for feedback. In this work, the robust tracking problem is faced considering: modeling errors, parametric variations, external perturbations, and noisy output measurement. On one side, the RAFL control faces modeling errors, parametric variations, and external perturbations through an observer that estimates uncertainties using an extra state, which lumps all the unknown nonlinearities and uncertainties. On the other hand, the proposed adaptive gain function allows the observer’s high gain to vary to have a fast observer’s convergence while simultaneously avoiding amplifying the measurement noise in the steadystate. The adaptive gain function provides the RAFL control robustness against noisy measurement. Thereby, the RAFL control with adaptive gain function becomes a robust feedback linearizing against to measurement noise. Finally, the RAFL controller with the adaptive gain function is illustrated by a numerical simulation of a tracking problem for a DC-motor and a chemical oxygen demand regulation in an anaerobic digestion process.
Activation of Neuronal Ensembles via Controlled Synchronization
Gualberto Solís-Perales,Juan Gonzalo Barajas-Ramírez 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.1
In this contribution we present the activation of neuronal ensembles of Hindmarsh-Rose neurons bycontrolled synchronization. The main problem consists in to impose a particular spiking-bursting behavior in allthe neurons of the network. We consider a network where the neurons are in its resting state, it is desired that theneurons change their resting state to a particular behavior of activation, dictated by a neuron called the referenceneuron. The goal is reached by controlling some neurons in the network controlling only the membrane potential(electrical synapse). The key feature of the present contribution is that by controlling a small number of neuronsin the network a desired behavior is induced in all the neurons in the network despite its network topology. Theimportant parameters are the control gain and the coupling strength, thus the activation of the network lays downon a compromise between the control gain and the coupling strength.
Maria Eliza Castro Moreira,Rosemary Gualberto Fonseca Alvarenga Pereira,Marcelo Jose Dias Silva,Danielle Ferreira Dias,Vanessa Silva Gontijo,Alexandre Giusti-Paiva,Marcia Paranho Veloso,Antônio Carlos 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.6
In the present study, the pharmacological effects of 2,8-dihydroxy-1,6-dimethoxyxanthone from the bark of Haploclathra paniculata were investigated in mice using in vivo inflammation and nociception models. Acetic acid-induced writhing, paw licking induced by formalin, hot plate, and carrageenan-induced paw edema tests were used to investigate the antiinflammatory and antinociceptive activities of the xanthone compound. Xanthone, at both doses, inhibited abdominal writhing and the formalin test. At a dose of 20mg/kg, the time of reaction to the hot plate increased, and significant effects were observed after 30, 60 and 90min of treatment. At doses of 10 and 20mg/kg p.o., the 2,8-dihydroxy-1,6-dimethoxyxanthone significantly reduced paw edema at 3 h after the stimulus. The tests also showed no acute toxicity of the xanthone compound in mice. 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ability was also studied and confirmed the antioxidant activity of the xanthone. To propose the mechanism of action of anti-inflammatory activity of the xanthone, a molecular docking was performed using the isoenzymes cyclooxygenase 1 and 2 and the results indicate that the molecule is capable of inhibiting both the enzymes. Therefore, it can be concluded that 2,8-dihydroxy-1,6-dimethoxyxanthone from H. paniculata demonstrates analgesic, anti-inflammatory, and antioxidant activities.
Ali William Canaza-Cayo,Paulo Savio Lopes,Marcos Vinicius Gualberto Barbosa da Silva,Robledo de Almeida Torres,Marta Fonseca Martins,Wagner Antonio Arbex,Jaime Araujo Cobuci 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.10
A total of 32,817 test-day milk yield (TDMY) records of the first lactation of 4,056 Girolando cows daughters of 276 sires, collected from 118 herds between 2000 and 2011 were utilized to estimate the genetic parameters for TDMY via random regression models (RRM) using Legendre's polynomial functions whose orders varied from 3 to 5. In addition, nine measures of persistency in milk yield (PSi) and the genetic trend of 305-day milk yield (305MY) were evaluated. The fit quality criteria used indicated RRM employing the Legendre's polynomial of orders 3 and 5 for fitting the genetic additive and permanent environment effects, respectively, as the best model. The heritability and genetic correlation for TDMY throughout the lactation, obtained with the best model, varied from 0.18 to 0.23 and from –0.03 to 1.00, respectively. The heritability and genetic correlation for persistency and 305MY varied from 0.10 to 0.33 and from –0.98 to 1.00, respectively. The use of PS7 would be the most suitable option for the evaluation of Girolando cattle. The estimated breeding values for 305MY of sires and cows showed significant and positive genetic trends. Thus, the use of selection indices would be indicated in the genetic evaluation of Girolando cattle for both traits.
Canaza-Cayo, Ali William,Lopes, Paulo Savio,da Silva, Marcos Vinicius Gualberto Barbosa,de Almeida Torres, Robledo,Martins, Marta Fonseca,Arbex, Wagner Antonio,Cobuci, Jaime Araujo Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.10
A total of 32,817 test-day milk yield (TDMY) records of the first lactation of 4,056 Girolando cows daughters of 276 sires, collected from 118 herds between 2000 and 2011 were utilized to estimate the genetic parameters for TDMY via random regression models (RRM) using Legendre's polynomial functions whose orders varied from 3 to 5. In addition, nine measures of persistency in milk yield ($PS_i$) and the genetic trend of 305-day milk yield (305MY) were evaluated. The fit quality criteria used indicated RRM employing the Legendre's polynomial of orders 3 and 5 for fitting the genetic additive and permanent environment effects, respectively, as the best model. The heritability and genetic correlation for TDMY throughout the lactation, obtained with the best model, varied from 0.18 to 0.23 and from -0.03 to 1.00, respectively. The heritability and genetic correlation for persistency and 305MY varied from 0.10 to 0.33 and from -0.98 to 1.00, respectively. The use of $PS_7$ would be the most suitable option for the evaluation of Girolando cattle. The estimated breeding values for 305MY of sires and cows showed significant and positive genetic trends. Thus, the use of selection indices would be indicated in the genetic evaluation of Girolando cattle for both traits.
Lessa, Ozana Almeida,Reis, Nadabe dos Santos,Leite, Selma Gomes Ferreira,Gutarra, Melissa Limoeiro Estrada,Souza, Alexilda Oliveira,Gualberto, Simone Andrade,de Oliveira, Julieta Rangel,Aguiar-Oliveir 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.1
During cocoa (Theobroma cacao L.) processing, the accumulated cocoa shell can be used for bioconversion to obtain valuable compounds. Here, we evaluate the effect of solid-state fermentation of cacao flour with Penicillium roqueforti on secondary metabolite composition, phenol, carotenoid, anthocyanin, flavonol, and fatty acids contents, and antioxidant activity. We found that the total concentrations of anthocyanins and flavonols did not change significantly after fermentation and the phenolic compound and total carotenoid concentrations were higher. The fermentation process produced an increase in saponin concentration and antioxidant activity, as well as significant changes in the levels of oleic, linoleic, gamma-linolenic, and saturated fatty acids. Based on our findings, we propose that the reuse of food residues through solid state fermentation is viable and useful.
Gefilloyd L. De Castro,Abee M. Eijansantos,Nuriza P. Jalani,Joni Czarina P. Amora,Gualberto A. Lantaya Jr. 충남대학교 아시아여론연구소 2022 Asian journal for public opinion research Vol.10 No.4
The effects of the COVID-19 pandemic across various sectors are far-reaching, and the education sector is not an exemption. Approved and recognized vaccines are clinically proven to provide protection and have been considered one of the primary mitigations against the virus. Knowledge, attitude, and related practices (henceforth KAP) toward the virus is widely considered to be an essential cognitive key in public health for health intervention, prevention, and promotion. Previous studies revealed a positive correlation between knowledge and attitude. This study investigated the KAP and their relationship among the 857 college students in one state college in the Philippines using an online survey. Using descriptive statistics, the findings showed that the majority of the respondents have been fully vaccinated against COVID-19. Respondents were shown to be knowledgeable about COVID-19, specifically about its transmission, clinical symptoms, treatment, risk groups, isolation, prevention, and control. Positive attitudes toward individual and governmental mitigation and control of the virus were shown. Their scores on practices revealed that they always exhibit protective and preventive behavioral practices. Pearson correlation revealed a weak significant relationship between knowledge and practice, and a fair significant relationship between attitude and practice. No significant relationship is found between knowledge and attitude. This study hopes to find its place in the literature worthy of consideration as empirical support toward understanding a specific group’s perceptive risk and preventive behavior toward the virus, policy making, and health intervention and promotion.
Ozana Almeida Lessa,Nadabe dos Santos Reis,Selma Gomes Ferreira Leite,Melissa Limoeiro Estrada Gutarra,Alexilda Oliveira Souza,Simone Andrade Gualberto,Julieta Rangel de Oliveira,Elizama Aguiar-Olivei 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.1
During cocoa (Theobroma cacao L.) processing, the accumulated cocoa shell can be used for bioconversion to obtain valuable compounds. Here, we evaluate the effect of solid-state fermentation of cacao flour with Penicillium roqueforti on secondary metabolite composition, phenol, carotenoid, anthocyanin, flavonol, and fatty acids contents, and antioxidant activity. We found that the total concentrations of anthocyanins and flavonols did not change significantly after fermentation and the phenolic compound and total carotenoid concentrations were higher. The fermentation process produced an increase in saponin concentration and antioxidant activity, as well as significant changes in the levels of oleic, linoleic, gamma-linolenic, and saturated fatty acids. Based on our findings, we propose that the reuse of food residues through solid state fermentation is viable and useful.
( Juan Carlos Lopez Alvarenga ),( William Orr ),( Jose Antonio Vargas Romero ),( Jose Maria Remes Troche ),( Miguel Morales Arambula ),( Julio Cesar Soto Perez ),( Gualberto Mateos Perez ),( Sergio So 대한소화기기능성질환·운동학회 2014 Journal of Neurogastroenterology and Motility (JNM Vol.20 No.1
Background/Aims To evaluate the effectiveness of pantoprazole magnesium (pantoprazole-Mg) 40 mg in the relief of esophageal and extra- esophageal symptoms of gastroesophageal reflux disease (GERD), particularly night-time symptoms. Methods Patients (aged 18-50 years) with 3-month history of heartburn and/or acid regurgitation plus at least one other symptom in the last week were enrolled in a nationwide, prospective and observational study in Mexico. Patients received pantoprazole-Mg 40 mg once daily during 4 weeks. Symptoms were assessed through a physician-administered structured interview and the patient- completed ReQuest in PracticeTM questionnaire. Night-time GERD was defined as arousal from sleep during the night due to GERD-associated symptoms. Results Out of 4,343 patients included at basal visit, 3,665 were considered for the effectiveness per protocol analysis. At baseline, patients had a median of 8 GERD related symptoms. Patients with night-time GERD symptoms (42.7%) were more likely to have extra-esophageal symptoms (P < 0.001) than other GERD patients. Pantoprazole-Mg 40 mg once daily for 4 weeks improved a broad range of GERD-associated symptoms from baseline (80% reduction on physicians assessments; 68-77% reduction on ReQuest in PracticeTM dimensions), including both day- and night-time GERD symptoms; improvements were the greatest for extra-esophageal symptoms in patients with night-time symptoms. Pantoprazole-Mg was well tolerated. Conclusions Pantoprazole-Mg 40 mg significantly improved a broad range of esophageal and extra-esophageal GERD related symptoms including sleep disturbances, as well as well-being, in patients with daytime or night-time GERD, making it a good option for patients with GERD, especially when extra-esophageal and night-time symptoms are present. (J Neurogastroenterol Motil 2014;20:64-73)