14 results on '"Mata, Omar"'
Search Results
2. Evaluation of the Potential of a Biocoagulant Produced from Prickly Pear Peel Waste Valorization for Wastewater Treatment.
- Author
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Aguilera Flores, Miguel Mauricio, Robles Miranda, Oswaldo Emmanuel, Medellín Castillo, Nahum Andrés, Ávila Vázquez, Verónica, Sánchez Mata, Omar, Vázquez Bañuelos, Rosendo, and Chávez Murillo, Carolina Estefanía
- Subjects
OPUNTIA ,WASTEWATER treatment ,ALUMINUM sulfate ,SEWAGE ,MATHEMATICAL optimization - Abstract
This study evaluated the potential of a biocoagulant produced from prickly pear peel waste valorization and its use as a biocoagulant aid mixed with aluminum sulfate to remove turbidity in domestic wastewater. A central composite design (CCD) and a simplex lattice design (SLD) of two components (biocoagulant and aluminum sulfate) were developed to determine the optimal doses and pH of the biocoagulant and optimal mixing proportions. Both designs optimized the coagulation process from an analysis of variance to fit the experimental data to mathematical models and an optimization analysis to obtain the highest percentage of turbidity removal. The results showed that a water pH of 4 and a biocoagulant dose of 100 mg/L are optimal conditions for a turbidity removal of 76.1%. The potential decreases to 51.7% when the wastewater pH is maintained at 7.8 and a dose of 250 mg/L is used. This efficiency could be increased to 58.2% by using a mixture with optimal proportions of 30% biocoagulant and 70% aluminum sulfate. The experimental data were fitted to two quadratic models, estimating model prediction errors of 0.42% and 2.34%, respectively. Therefore, these results support the valorization of prickly pear peel waste to produce a biocoagulant, which could be used in acid and alkaline wastewater or as a biocoagulant aid mixed with aluminum sulfate. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Tailored gamification and serious game framework based on fuzzy logic for saving energy in connected thermostats
- Author
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Ponce, Pedro, Meier, Alan, Méndez, Juana Isabel, Peffer, Therese, Molina, Arturo, and Mata, Omar
- Published
- 2020
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4. Environmental impacts estimation by life cycle assessment of bioanodes fabricated from devilfish bone chars and their application in microbial fuel cells to produce bioenergy.
- Author
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Aguilera Flores, Miguel Mauricio, Medellin Castillo, Nahum Andrés, Ávila Vázquez, Verónica, Herrera Orozco, Israel, Sánchez Mata, Omar, and Pinedo Torres, Laura Alejandra
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PRODUCT life cycle assessment ,ENVIRONMENTAL impact analysis ,MICROBIAL fuel cells ,CHAR ,COMBUSTION ,FUEL cells - Abstract
This study estimated the environmental impacts by life cycle assessment (LCA) of bioanodes fabricated from devilfish bone chars and their application in microbial fuel cells (MFC). Two types of devilfish bone chars were obtained by calcination using nitrogen (BCN) and air (BCA) as purge gases. Two bioanodes were fabricated with BCN and BCA and applied independently in MFC to produce bioenergy from ibuprofen and carbamazepine biodegradation. LCA was performed using the methodology ISO 14,040. 1 kg of fabricated bioanode and 1 kWh of produced bioenergy were the established functional units, integrating a detailed inventory of the materials’ fabrication and application in MFC. The impact assessment was made with SimaPro 9.2 software and the ReCiPe 2016 Midpoint (I) method, considering 18 impact categories. Results showed that the bioanode fabricated with BCN has less environmental impacts (1.09 times) than BCA, finding the highest impact in the categories of human carcinogenic toxicity (1.04 kg 1,4-DCB) and human non-carcinogenic toxicity (13.60 kg 1,4-DCB). The environmental impacts in MFC-Ibuprofen were 3.1 times higher than MFC-Carbamazepine in the same impact categories, with 12.76 kg 1,4-DCB and 168.34 kg 1,4-DCB, respectively. Therefore, it is recommended to use BCN to fabricate the bioanode and to apply it in MFC to produce bioenergy from carbamazepine biodegradation. Although the LCA was performed with data obtained at a laboratory level, the results provide information on the environmental impacts that could be generated if both processes are transferred on a large scale, identifying opportunities for improvement to reduce these impacts. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Local Weather Station Design and Development for Cost-Effective Environmental Monitoring and Real-Time Data Sharing.
- Author
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Rivera, Antonio, Ponce, Pedro, Mata, Omar, Molina, Arturo, and Meier, Alan
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METEOROLOGICAL stations ,ENVIRONMENTAL monitoring ,AUTOMATIC meteorological stations ,BOX-Jenkins forecasting ,AIR quality monitoring - Abstract
Current weather monitoring systems often remain out of reach for small-scale users and local communities due to their high costs and complexity. This paper addresses this significant issue by introducing a cost-effective, easy-to-use local weather station. Utilizing low-cost sensors, this weather station is a pivotal tool in making environmental monitoring more accessible and user-friendly, particularly for those with limited resources. It offers efficient in-site measurements of various environmental parameters, such as temperature, relative humidity, atmospheric pressure, carbon dioxide concentration, and particulate matter, including PM 1, PM 2.5, and PM 10. The findings demonstrate the station's capability to monitor these variables remotely and provide forecasts with a high degree of accuracy, displaying an error margin of just 0.67%. Furthermore, the station's use of the Autoregressive Integrated Moving Average (ARIMA) model enables short-term, reliable forecasts crucial for applications in agriculture, transportation, and air quality monitoring. Furthermore, the weather station's open-source nature significantly enhances environmental monitoring accessibility for smaller users and encourages broader public data sharing. With this approach, crucial in addressing climate change challenges, the station empowers communities to make informed decisions based on real-time data. In designing and developing this low-cost, efficient monitoring system, this work provides a valuable blueprint for future advancements in environmental technologies, emphasizing sustainability. The proposed automatic weather station not only offers an economical solution for environmental monitoring but also features a user-friendly interface for seamless data communication between the sensor platform and end users. This system ensures the transmission of data through various web-based platforms, catering to users with diverse technical backgrounds. Furthermore, by leveraging historical data through the ARIMA model, the station enhances its utility in providing short-term forecasts and supporting critical decision-making processes across different sectors. [ABSTRACT FROM AUTHOR]
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- 2023
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6. Bioremediation of Automotive Residual Oil-Contaminated Soils by Biostimulation with Enzymes, Surfactant, and Vermicompost.
- Author
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Sánchez Mata, Omar, Aguilera Flores, Miguel Mauricio, Ureño García, Brenda Gabriela, Ávila Vázquez, Verónica, Cabañas García, Emmanuel, and Franco Villegas, Efrén Alejandro
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- 2023
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7. Energy Savings in Buildings Based on Image Depth Sensors for Human Activity Recognition.
- Author
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Mata, Omar, Méndez, Juana Isabel, Ponce, Pedro, Peffer, Therese, Meier, Alan, and Molina, Arturo
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HUMAN activity recognition , *IMAGE sensors , *HOME energy use , *INTELLIGENT buildings , *RECURRENT neural networks , *COMMERCIAL buildings , *COMPUTER vision - Abstract
A smart city is a city that binds together technology, society, and government to enable the existence of a smart economy, smart mobility, smart environment, smart living, smart people, and smart governance in order to reduce the environmental impact of cities and improve life quality. The first step to achieve a fully connected smart city is to start with smaller modules such as smart homes and smart buildings with energy management systems. Buildings are responsible for a third of the total energy consumption; moreover, heating, ventilation, and air conditioning (HVAC) systems account for more than half of the residential energy consumption in the United States. Even though connected thermostats are widely available, they are not used as intended since most people do not have the expertise to control this device to reduce energy consumption. It is commonly set according to their thermal comfort needs; therefore, unnecessary energy consumption is often caused by wasteful behaviors and the estimated energy saving is not reached. Most studies in the thermal comfort domain to date have relied on simple activity diaries to estimate metabolic rate and fixed values of clothing parameters for strategies to set the connected thermostat's setpoints because of the difficulty in tracking those variables. Therefore, this paper proposes a strategy to save energy by dynamically changing the setpoint of a connected thermostat by human activity recognition based on computer vision preserving the occupant's thermal comfort. With the use of a depth sensor in conjunction with an RGB (Red–Green–Blue) camera, a methodology is proposed to eliminate the most common challenges in computer vision: background clutter, partial occlusion, changes in scale, viewpoint, lighting, and appearance on human detection. Moreover, a Recurrent Neural Network (RNN) is implemented for human activity recognition (HAR) because of its data's sequential characteristics, in combination with physiological parameters identification to estimate a dynamic metabolic rate. Finally, a strategy for dynamic setpoints based on the metabolic rate, predicted mean vote (PMV) parameter and the air temperature is simulated using EnergyPlus™ to evaluate the energy consumption in comparison with the expected energy consumption with fixed value setpoints. This work contributes with a strategy to reduce energy consumption up to 15% in buildings with connected thermostats from the successful implementation of the proposed method. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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8. Primary Hepatic Neuroendocrine Carcinoma with Metastasis to the Mesentery: A Case Report.
- Author
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Fernández-Ferreira, Ricardo, Romero-López, Ulises, Robles-Aviña, Jorge Alberto, Rivas-Mendoza, Uriel Norberto, González-Camacho, Casandra, Valero-Gómez, Alfredo, Barquet-Mata, Omar Armando, Reyes-Gabiño, Almira, Tovar-Figueroa, Karen Analí, and Ramírez-Villagrán, Viridiana
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NEUROENDOCRINE tumors ,MESENTERY ,LIVER tumors ,METASTASIS ,LIVER biopsy ,MERKEL cell carcinoma ,CARCINOID - Abstract
Primary hepatic neuroendocrine carcinomas (PHNECs) are extremely rare, with only about 90 cases having been reported in the English-language literature. Among all neuroendocrine neoplasms, primary hepatic neuroendocrine tumors (NETs) and neuroendocrine carcinomas (NECs) are extremely rare, accounting for 0.3% of NETs and 0.28–0.46% of malignant liver tumors. Additionally, primary hepatic NECs occur infrequently. The clinical diagnosis of primary hepatic NEC remains challenging because of its rarity and the lack of information about its characteristic appearance on images. Consequently, pathological examination through the performance of a preoperative liver tumor biopsy is essential for diagnosis. Due to the lack of availability of substantial high-quality data, there is no standard therapy for primary hepatic NEC. We present the first case of PHNEC metastasized to the mesentery reported in the English-language literature. [ABSTRACT FROM AUTHOR]
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- 2023
- Full Text
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9. Study on the Effectiveness of Two Biopolymer Coagulants on Turbidity and Chemical Oxygen Demand Removal in Urban Wastewater.
- Author
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Aguilera Flores, Miguel Mauricio, Valdivia Cabral, Gloria Itzel, Medellín Castillo, Nahum Andrés, Ávila Vázquez, Verónica, Sánchez Mata, Omar, and García Torres, Jésica
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CHEMICAL oxygen demand ,COAGULANTS ,BIOPOLYMERS ,TURBIDITY ,SEWAGE - Abstract
The present study investigated the effectiveness of two biopolymer coagulants on turbidity and chemical oxygen demand removal in urban wastewater. The biopolymers were produced from vegetal biomass using the mucilage extracted from Opuntia robusta cladodes, and Uncaria tomentosa leaves. Opuntia robusta is an abundant species in Mexico, which is not edible. Uncaria tomentosa is an exotic invasive species in Mexico and other countries, which negatively affects the ecosystems where it is introduced. A combined experimental design of mixture–process was selected to evaluate the effectiveness of both biopolymer coagulants regarding aluminum sulfate (conventional chemical coagulant). Results showed turbidity and chemical oxygen demand removal efficiencies of 42.3% and 69.6% for Opuntia robusta and 17.2% and 39.4% for Uncaria tomentosa biopolymer coagulant, respectively, at a dose of 200 mg/L. Furthermore, optimum conditions from the experimental design to reach the maximum turbidity and chemical oxygen demand removal were obtained at an Opuntia robusta biopolymer coagulant concentration of 10 mg/L, showing removal efficiencies of 68.7 ± 1.7% and 86.1 ± 1.4%, respectively. These results support using Opuntia robusta as an alternative biopolymer coagulant in urban wastewater treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
10. How to develop research skills among undergraduate engineering students to tackle current ongoing topics? A Smart-Grid case study.
- Author
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Ponce, Pedro, Ibarra, Luis, Mata, Omar, and Molina, Arturo
- Subjects
RESEARCH skills ,ENGINEERING students ,UNDERGRADUATES ,UNDERGRADUATE programs ,COMPUTER engineers - Abstract
The Smart-Grid approach, as a paramount worldwide issue, is a paradigm shift from the traditional way energy is produced, distributed, and used. It implies a complex multidisciplinary panorama which includes ongoing subjects for which traditional electrical and computer engineers are not entirely ready. As the implementation of Smart-Grid is imminent, high-skilled professionals are needed to absorb the research, labor, business, logistics, and innovation issues of today and tomorrow. This leads to a transformation of the education role for undergraduate programs which is now, accordingly, urged to build up students' research skills. In this paper, a case study is presented to introduce and asses a new teaching/evaluation methodology intended to build critical thinking, objectivity, and ingenuity among mechanical–electrical undergraduate students during a one-semester course on Smart-Grid. The results show that the proposed technique may improve the aforementioned research skills within the group of students. Overall, the proposed methodology can be used as a protocol to guide new research cases and to frame similar educational proposals. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
11. Model for economical analysis of oil and gas deepwater production concepts : Comparisons of life cycle cost of subsea production systems vs. floating structures with dry wellheads
- Author
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Romero Mata, Omar
- Subjects
Technology: 500 [VDP] ,concept selection ,offshore teknologi ,dry tree ,wet tree ,Mexico ,undervannsteknologi - Abstract
Master's thesis in Offshore technology The scope of the work was to create a model that will allow the comparison of Life Cycle Costs (LCC) for subsea production systems and floating structures with dry wellheads for the Mexican territorial waters of the Gulf of Mexico. To give validity to the model, an empirical comparison on the resulting recovery factor based on data of the US Gulf of Mexico was included. This comparison is intended to answer ¿Is there a significant difference in the recovery factor when is used the dry tree vs. the wet tree concept solutions? The model proposed integrates a number of already published models done by academics, the industry and governments. Also, it was found that the activity in deep water offshore Mexico is having place in a region with an evident lack of preexisting infrastructure. Hence it is proposed in the model that new offshore structures shall have an added value for comparison purposes Two hypothetical projects (three different concepts for each project) of field development, based in public information released by PEMEX, are assessed. Conclusions and recommendations are made to increase the possibilities of feasible future field development and efficient depletion of the hydrocarbons located in Mexican deepwater.
- Published
- 2010
12. S4 Features and Artificial Intelligence for Designing a Robot against COVID-19—Robocov.
- Author
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Ponce, Pedro, Mata, Omar, Perez, Esteban, Lopez, Juan Roberto, Molina, Arturo, and McDaniel, Troy
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ARTIFICIAL intelligence ,ROBOT design & construction ,COVID-19 ,COVID-19 pandemic ,MACHINE learning ,ROBOTS - Abstract
Since the COVID-19 Pandemic began, there have been several efforts to create new technology to mitigate the impact of the COVID-19 Pandemic around the world. One of those efforts is to design a new task force, robots, to deal with fundamental goals such as public safety, clinical care, and continuity of work. However, those characteristics need new products based on features that create them more innovatively and creatively. Those products could be designed using the S4 concept (sensing, smart, sustainable, and social features) presented as a concept able to create a new generation of products. This paper presents a low-cost robot, Robocov, designed as a rapid response against the COVID-19 Pandemic at Tecnologico de Monterrey, Mexico, with implementations of artificial intelligence and the S4 concept for the design. Robocov can achieve numerous tasks using the S4 concept that provides flexibility in hardware and software. Thus, Robocov can impact positivity public safety, clinical care, continuity of work, quality of life, laboratory and supply chain automation, and non-hospital care. The mechanical structure and software development allow Robocov to complete support tasks effectively so Robocov can be integrated as a technological tool for achieving the new normality's required conditions according to government regulations. Besides, the reconfiguration of the robot for moving from one task (robot for disinfecting) to another one (robot for detecting face masks) is an easy endeavor that only one operator could do. Robocov is a teleoperated system that transmits information by cameras and an ultrasonic sensor to the operator. In addition, pre-recorded paths can be executed autonomously. In terms of communication channels, Robocov includes a speaker and microphone. Moreover, a machine learning algorithm for detecting face masks and social distance is incorporated using a pre-trained model for the classification process. One of the most important contributions of this paper is to show how a reconfigurable robot can be designed under the S3 concept and integrate AI methodologies. Besides, it is important that this paper does not show specific details about each subsystem in the robot. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
13. Effectiveness of a natural coagulant based on common mallow ( Malva sylvestris ) in urban wastewater treatment.
- Author
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Aguilera Flores MM, Robles Miranda OE, Ávila Vázquez V, Medellín Castillo NA, Sánchez Mata O, Medina Leaños R, and González Fernández LA
- Abstract
This study evaluated the effectiveness of a natural coagulant based on common mallow ( Malva sylvestris ) to remove turbidity in urban wastewater. A 2
2 factorial design was selected to determine the optimal dose and the working pH of the natural coagulant. Its potential was studied in 50.0-450 mg/L and 4.00-10.0 ranges of doses and pH, respectively. A simplex lattice mixture evaluated its effectiveness as a coagulant aid combined with aluminum sulfate (conventional coagulant). Mixture proportions 0.000-1.00 were studied for each component, finding the proportion more effective. Results showed that the coagulation treatment could be feasible since a turbidity removal efficiency of 73.7% can be achieved under optimal conditions (50.0 mg/L and pH of 10.0). Likewise, a turbidity removal of 58.9% is obtained using 250 mg/L and maintaining wastewater pH (7.45). This efficiency can be increased using 31.0% natural coagulant mixed with 69.0% aluminum sulfate at 250 mg/L without modifying the wastewater pH. This improvement was associated with the natural coagulant's high molecular weight and long-chained structure since these properties enhance settling time, floc size and strength, and low sludge production. These results support using common mallow as a natural coagulant, making its use more feasible in alkaline water pH or as a coagulant aid combined with aluminum sulfate for urban wastewater treatment. A cost of USD 370/Kg of natural coagulant was estimated, which is higher than conventional coagulants. However, a cost-effectiveness analysis of its implementation should be performed since process scaling costs could significantly reduce its price.- Published
- 2024
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14. Study on the Effectiveness of Two Biopolymer Coagulants on Turbidity and Chemical Oxygen Demand Removal in Urban Wastewater.
- Author
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Aguilera Flores MM, Valdivia Cabral GI, Medellín Castillo NA, Ávila Vázquez V, Sánchez Mata O, and García Torres J
- Abstract
The present study investigated the effectiveness of two biopolymer coagulants on turbidity and chemical oxygen demand removal in urban wastewater. The biopolymers were produced from vegetal biomass using the mucilage extracted from Opuntia robusta cladodes, and Uncaria tomentosa leaves. Opuntia robusta is an abundant species in Mexico, which is not edible. Uncaria tomentosa is an exotic invasive species in Mexico and other countries, which negatively affects the ecosystems where it is introduced. A combined experimental design of mixture-process was selected to evaluate the effectiveness of both biopolymer coagulants regarding aluminum sulfate (conventional chemical coagulant). Results showed turbidity and chemical oxygen demand removal efficiencies of 42.3% and 69.6% for Opuntia robusta and 17.2% and 39.4% for Uncaria tomentosa biopolymer coagulant, respectively, at a dose of 200 mg/L. Furthermore, optimum conditions from the experimental design to reach the maximum turbidity and chemical oxygen demand removal were obtained at an Opuntia robusta biopolymer coagulant concentration of 10 mg/L, showing removal efficiencies of 68.7 ± 1.7% and 86.1 ± 1.4%, respectively. These results support using Opuntia robusta as an alternative biopolymer coagulant in urban wastewater treatment.
- Published
- 2022
- Full Text
- View/download PDF
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