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Adequation of a Virtual Immersive Environment for a Learning-Teaching Interaction Using the Limem 3d Method

通讯和计算机（中英文版） 2015年第2期12卷 57-66页

作者： diego mauricio torres arias Helmuth Trefftz Department of software engineer Universidad EAFIT Department of Computer and Systems Laboratory of Virtual Reality Universidad EAFIT Medellin Colombia

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Hydrochar and synthetic natural gas co-production for a full circular economy implementation via hydrothermal carbonization and methanation:An economic approach

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Journal of Environmental Sciences 2024年第6期140卷 69-78页

作者： Judith González-arias Guillermo torres-Sempere Miriam González-Castaño Francisco MBaena-Moreno Tomás RReina Inorganic Chemistry Department and Materials Sciences Institute University of Seville-CSICSevilleSpain Materials Sciences Institute(ICMSE) CSIC-University of SevilleSevilleSpain Department of Chemistry and Chemical Engineering Chalmers University of TechnologyGothenburgSE 41296Sweden

Herein we study the economic performance of hydrochar and synthetic natural gas coproduction from olive tree *** process entails a combination of hydrothermal carbonization and *** a previous work,we evidenced that standalone hydrochar production via HTC results ***,we propose a step forward on the process design by implementing a methanation,adding value to the gas effluent in an attempt to boost the overall process techno-economic *** different plant capacities were analyzed(312.5,625 and 1250 kg/hr).The baseline scenarios showed that,under the current circumstances,our circular economy strategy in *** analysis of the revenues shows that hydrochar selling price have a high impact on NPV and subsidies for renewable coal production could help to boost the profitability of the *** the contrary,the analysis for natural gas prices reveals that prices 8 times higher than the current ones in Spain must be achieved to reach *** seems unlikely even under the presence of a strong subsidy *** costs analysis suggests that a remarkable electricity cost reduction or electricity consumption of the HTC stage could be a potential strategy to reach profitability ***,significant reduction of green hydrogen production costs is deemed instrumental to improve the economic performance of the *** results show the formidable techno-economic challenge that our society faces in the path towards circular economy societies.

关键词： Hydrothermal carbonization CO_(2)waste valorization Methanation Profitability analysis

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A decrease of docosahexaenoic acid in testes of mice fed a high-fat diet is associated with impaired sperm acrosome reaction and fertility

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Asian Journal of Andrology 2021年第3期23卷 306-313页

作者： Julio Bunay Luz-Maria Gallardo Jorge Luis torres-Fuentes M Veronica Aguirre-arias Renan Orellana Nestor Sepulveda Ricardo D Moreno Physiology Department Faculty of Biological SciencesPontificia Universidad Cat6lica de Chile(PUC)Santiago 8331150Chile Department of Chemistry and Biological Sciences Health Sciences FacultyUniversidad Bernardo 0 HigginsSantiago 8370854Chile Center of Excellence in Biotechnology of Reproduction Universidad de la FronteraTemuco 4780000Chile.

Obesity is a major worldwide health problem that is related to most chronic diseases,including male *** to its wide impact on health,mechanisms underlying obesity-related infertility remain *** this study,we report that mice fed a high-fat diet(HFD)for over 2 months showed reduced fertility rates and increased germ cell apoptosis,seminiferous tubule degeneration,and decreased intratesticular estradiol(E2)and E2-to-testosterone ***,we also detected a decrease in testicular fatty acid levels,behenic acid(C22:0),and docosahexaenoic acid(DHA,22:6n-3),which may be related to the production of dysfunctional ***,we did not detect any changes in the frequency of seminiferous tubule stages,sperm count,or rate of in vitro ***,there was an increase in spontaneous and progesterone-induced acrosomal exocytosis(acrosome reaction)in spermatozoa from HFD-fed *** data suggest that a decrease in E2 and fatty acid levels influences spermatogenesis and some steps of acrosome biogenesis that will have consequences for ***,our results add new evidence about the adverse effect of obesity in male reproduction and suggest that the acrosomal reaction can also be affected under this condition.

关键词： cholesterol estradiol fat acid testis testosterone

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用Lewis酸或Brnsted酸催化剂和N_2汽提法使木糖脱水为糠醛(英文)

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催化学报 2013年第7期34卷 1402-1406页

作者： Iker AGIRREZABAL-TELLERIA Cristina GARCíA-SANCHO Pedro MAIRELES-torres Pedro Luis arias Department of Chemical and Environmental Engineering Engineering School University of the Basque Country (EHU/UPV) Alameda Urquijo s/n48013 Bilbao Spain Department of Inorganic Chemistry Cristallography and Mineralogy (Unit Associated to ICP-CSIC) Science Faculty University of Mdlaga Campus Teatinos s/n 29071 M61aga Spain

The activity of Lewis (Nb2O5) and Br nsted (Amberlyst 70) acid catalysts for the cyclodehydration of xylose to furfural was studied. The nature of the acidity resulted in significant changes in the reaction mechanism. Lewis acid sites promote the formation of xylulose, while Br nsted acid sites are required to further dehydrate the sugar to furfural. Amberlyst 70 in water/toluene at 175 ℃ showed lower activity but gave a higher furfural yield. Using N2 as the stripping agent considerably improved the furfural yield and product purity in the stripped stream. Catalyst stability was also studied.

关键词：环化脱水酸催化剂刘易斯糠醛木糖 Br 氮气大孔树脂

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Avocado and Chayote-Two Edible and Medicinal Plants

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Journal of Environmental Science and Engineering(B) 2023年第2期12卷 70-74页

作者： Edmundo arias torres Bolívar arias Olguín Department of Applied Technology Mexican Institute of Appropriate TechnologiesS.C.Mexico CityCode.07270México

There are two agricultural products originating in Mexico with nutritional,medicinal and cosmetic *** is the Avocado,the fruit of a tree that is widely accepted in the Mexican diet due to its pleasant *** other is the Chayote,a green vegetable that grows like a vine,with guides that can exceed up to 6 m in *** two foods,in addition to being consumed nationally,are also exported,which is why they are of economic importance for *** is the most exported,after coffee and tomato,with Chayote in fourth place.

关键词： Avocado chayote food.

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Tomato and Romerito Edible and Important Plants for Human Health

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Journal of Environmental Science and Engineering(B) 2022年第6期11卷 267-271页

作者： Edmundo arias torres Bolívar arias Olguín Department of Applied Technology Mexican Institute of Appropriate TechnologiesS.C.Mexico CityCode.07270.México

Two plant foods are presented,Romerito and tomato,with nutritional properties that can help improve people’s *** can be grown in the open field,in a greenhouse or in a pot all year *** Romerito grows in semi-arid *** the Romerito and the tomato contain vitamins,minerals and fiber which make them complete *** can be used in cosmetology as well.

关键词： Romerito tomato vegetable food

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Optimized Convolutional Neural Network Models for Skin Lesion Classification

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Computers, Materials & Continua 2022年第2期70卷 2131-2148页

作者： Juan Pablo Villa-Pulgarin Anderson Alberto Ruales-torres Daniel arias-GarzónMario Alejandro Bravo-Ortiz Harold Brayan Arteaga-Arteaga Alejandro Mora-RubioJesus Alejandro Alzate-Grisales Esteban Mercado-Ruiz M.Hassaballah Simon Orozco-arias Oscar Cardona-Morales Reinel Tabares-Soto Department of Electronics and Automation Universidad Autónoma deManizalesManizales170001Colombia SEDMATEC Corporación Universitaria Autónoma de Nari駉Pasto520002Colombia Department of Computer Science Faculty of Computers and InformationSouth Valley UniversityQena83523Egypt Department of Computer Science Universidad Autónoma de ManizalesManizales170001Colombia Department of Systems and Informatics Universidad de CaldasManizales170001Colombia

Skin cancer is one of themost severe diseases,andmedical imaging is among themain tools for cancer *** images provide information on the evolutionary stage,size,and location of tumor *** paper focuses on the classification of skin lesion images considering a framework of four experiments to analyze the classification performance of Convolutional Neural Networks(CNNs)in distinguishing different skin *** CNNs are based on transfer learning,taking advantage of ImageNet ***,in each experiment,different workflow stages are tested,including data augmentation and fine-tuning *** CNN models based on DenseNet-201,Inception-ResNet-V2,and Inception-V3 are proposed and compared using the HAM10000 *** results obtained by the three models demonstrate accuracies of 98%,97%,and 96%,***,the best model is tested on the ISIC 2019 dataset showing an accuracy of 93%.The proposed methodology using CNN represents a helpful tool to accurately diagnose skin cancer disease.

关键词： Deep learning skin lesion convolutional neural network data augmentation transfer learning

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Haba and Huitlacoche,Nutritious Foods of Little Consumption

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Journal of Environmental Science and Engineering(A) 2024年第3期13卷 86-89页

作者： Edmundo arias torres Imilla Iarias Olguín Bolivar arias Olguín Department of Applied Technology Mexican Institute of Appropriate TechnologiesS.C.Mexico City 07270México

Haba and Huitlacoche are foods of little consumption *** provide nutrients to the human body due to the fiber,antioxidants,vitamins and essential amino acids they *** broad bean can be grown alone or intercropped with corn and *** is a fungus that affects corn,however in Mexico it has been used as food since the times of the Aztec culture.

关键词： Bean Huitlacoche nutritious food

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Sustainable Development Project for a Suburban Community Located in Xalapa, Veracruz, Mexico

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Journal of Environmental Science and Engineering(A) 2020年第2期9卷 72-76页

作者： Edmundo arias torres Bolívar Marias Olguín Mexican Institute of Appropriate Technology(IMETA) Mexico City 07279Mexico

Rural-urban development project in an ejidal community (portion of common land several owners) is located in the suburban area of Xalapa, Veracruz, *** place where the community is located has a lagoon that was contaminated with water lily. Now we want to implement a suburban sustainable development project using ecological and appropriate technologies to the community and the place, taking advantage of that body of water to grow fish and as a recreational area for visitors and thus generating food and economic resources in favor of the community with the food sales, boat rentals and recreational *** project adds to the achievement of 12 of the 17 Sustainable Development Goals of the United Nations Organization.

关键词： Sustainable ecosystems appropriate technologies suburban cooperative community empowerment

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Ca-alginate spheres behavior in presence of some solvents and water-solvent mixtures

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Advances in Bioscience and Biotechnology 2011年第1期2卷 8-12页

作者： Luis G. torres Angelica Velasquez Marco A. Brito-arias 不详

Immobilization systems more frequently used are calcium alginate spheres. These biocatalysts have many potential applications in the immobilization of enzymes, prokaryotic cells, vegetal and animal cells, algae, organelles and mixtures of these living components. Other applications of immobilized cells imply the use of non aqueous systems. Some bioconversions are carried out in the presence of solvents such as hexane acetone or acetonitrile, or mixtures water-solvents. The aim of this work was to investigate the behaviour of Ca-alginate spheres when put in contact with different solvents (water, diesel, ethanol, methanol, acetone, n-hexane, isopropyl alcohol, THF, acetonitrile, and toluene), or solvent-water mixtures (i.e., ethanol-water), regarding the resistance of the alginate spheres after days of contact. Calcium alginate particles suffered different damages, depending on the solvent they were put in contact. Water did not damaged the Ca-alginate structure with or without Ca present. On the other hand different solvents lost a proportion of volume, i.e., n-hexane (16%), methanol (19%), ethanol (19.5%), toluene (22%), diesel (34%), acetone (765), isopropyl alcohol (80%), THF and acetonitrile (total loss, total destruction). Nor the dielectric constant nor the polarity indexes were capable of explaining the difference on the volume loss or total sphere destruction, except for water-ethanol mixtures.

关键词： Dielectric Constant Ca-Alginate Immobilization Solvents Spheres Polarity Index

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