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Anaerobic Co-digestion Process Efficiency Estimation in Phases as an Alternative for Municipal Waste Treatment

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Journal of Environmental Science and Engineering(B) 2021年第1期10卷 9-19页

作者： María Montes Alejandra Vásquez Pedro García sergio zamora Naim Sulvarán Viniza Ureña Department of Environmental Engineering Institute for EngineeringUniversity of VeracruzBoca del RioVer 94294Mexico Graduate Department Faculty of Construction Engineering and HabitatUniversity of VeracruzBoca del RioVer 94294Mexico Department of Chemical Engineering Faculty of Chemical SciencesUniversity of VeracruzBoca del RioVer 94294Mexico

The incorrect disposal of the waste generated in the municipalities contributes to water and soil contamination,resulting in a real concern in order to find an adequate disposal as well as obtain by-products that can be used to reduce CO2 *** digestion turns out to be the most efficient treatment,both in environmental and economic *** objective of this study is to evaluate the anaerobic co-digestion process in phases as an alternative for the treatment of municipal waste:sludge from water treatment plants and the biodegradable part of Municipal Solid Waste(MSW),for three HRTs(Hydraulic Retention Times).Testing results show up a max elimination of 70.68%in VS(Volatile Solids)and 74.01%in COD(Chemical Oxygen Demand).With these percentages of elimination on average,15.96 L/d of biogas was produced,for each kg of COD eliminated 0.56 m3 of biogas was produced and for each kg of SV 0.85 m3 and methane of 50.10%.

关键词： Co-digestion methane municipal waste

Study of the Viability of Sargassum as a Substrate to Produce Biofuel

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Journal of Environmental Science and Engineering(A) 2022年第2期11卷 55-61页

作者： María Montes Alejandra Vásquez Jessica De la O Pedro García Guillermo Hermida Miguel Hernández sergio zamora Department of Environmental Engineering Institute for EngineeringUniversity of VeracruzBoca del RioVer.94294Mexico Department Chemical Engineering Faculty of Chemical SciencesUniversity of VeracruzBoca del RioVer.94294Mexico Department Dynamic of Systems Institute for EngineeringUniversity of VeracruzBoca del RioVer.94294Mexico Graduate Department Faculty of Construction Engineering and HabitatUniversity of VeracruzBoca del RíoVer.94294Mexico

Sargassum is an indicator of progressive pollution in the seas because it causes lack of light and lack of *** arrives in the Mexican Caribbean between the months of April and September,causing a bad smell that it has after its decomposition,a heavy load of heavy metals,as well as being an inconvenience for the inhabitants because it causes losses for tourism in that *** are several ways to take advantage of these algae and one of them is to generate biomass to obtain a *** objective of this study was to determine the viability of sargassum(two varieties)as a substrate to obtain biogas in anaerobic co-digestion with sludge from a WWTP(Wastewater Treatment Plant).Two forms of drying were also applied to the two varieties of *** was obtained that sargassum is a good component to co-digest because it does not destabilize the process and good biogas production is achieved.

关键词： Sargassum co-digestion biogas

Comparison of Control Techniques in a Weight Lifting Exoskeleton

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Journal of Bionic Engineering 2019年第4期16卷 663-673页

作者： Irving Rosales-Diaz Jesus Ricardo Lopez-Gutierrez Angel Eduardo zamora Suarez sergio Rosario Salazar Antonio Osorio-Cordero Hipolito Aguilar-Sierra Rogelio Lozano CINVESTAV Av.Institute Politecnico Nacional 2508Col.San Pedro Zacatenco07360Mexico CityMexico CONACYT-CINVESTAV Av.Institute Politecnico Nacional 2508Col.San Pedro Zacatenco07360Mexico CityMexico Polytechnic University of Tulancingo St.Ingenierias 100Col.Huapalcalco43629TulancingoHidalgoMexico Centre de Recherches de Royalieu UTC-HEUDIASyCCompiegne60205France

The back pain is the most common injury in human activities where heavy objects must be lifted or must be suspended for a long time.A weight lifting exoskeleton also known as force augmentation exoskeleton is designed to reduce the strain on the back and the limbs and reduce the risk to suffer *** the other hand,different kinds of controllers have been implemented to achieve whit this goal,for example,a conventional PD Control,PD Control with Gravity Compensation,PD Control with Adaptive Desired Gravity Compensation and PD Control with Robust *** paper aims to evaluate and compare the performance from the previously cited controllers used to reduce the strain in the back,through the implementation of each controller in a three Degrees Of Freedom(DOF)exoskeleton powered by pneumatic muscle actuators;some numerical simulations as well as experimental trials have been conducted and three different performance indices were used in order to determine the effectiveness of each one with respect to the simple PD controller when the mass to be lifted is unknown.

关键词： augmenting force device exoskeleton robot pneumatic artificial muscles adaptive control robust control

An Optimal Design Method Based on Small Amplitude Homogenization

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Chinese Annals of Mathematics,Series B 2015年第5期36卷 843-854页

作者： sergio GUTIERREZ Department of Structural and Geotechnical Engineering Pontificia Universidad Catolica de Chile

An optimal design method for two materials based on small amplitude homogenization is presented. The method allows to use quite general objective functions at the price that the two materials should have small contrasts in their relevant physical parameters. The following two applications are shown: Stress constrained compliance minimization and defect location in elastic bodies.

关键词： Homogenization Inverse problems Relaxation Stress concentration

Molecular and crystal assembly inside the carbon nanotube:encapsulation and manufacturing approaches

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Advances in Manufacturing 2013年第3期1卷 198-210页

作者： sergio Manzetti Fjordforsk A.S. Institute of Science and Technology6896 FresvikNorway Van der Spoel Lab.Computational Systems and Biology Biomedical CentreUniversity of UppsalaP.O.Box 25675105 UppsalaSweden

Encapsulation of different guestspecies such as molecules and ions inside carbon nanotubes （CNTs） has been reported in the literatures during the last 15 years and repre sents an exciting development of nanoengineering of novel materials and composites. The reported nanocomposite mate rials show the semiconducting properties with potential applications in nanosensors, nanounits and nanocircuits as well as advanced energy transfer and storage properties, and encompass manufacturing for novel nanowires, nanoelectronic devices with properties designed with optoelectronic, spin tronic and nanomagnetic qualities. This review reports on a wide range of encapsulation references with particular focus on single molecules, atomic chains, metal halides and polymers encapsulated inside CNTs. The encapsulation methods and the chemical and physical qualities of these novel materials are crucial for the future manufacturing of novel innovations in nanotechnology, and represent therefore the current stateof theart of encapsulation methods in advanced manufacturing.

关键词： Encapsulation Carbon nanotubes (CNTs)Composites conductive Molecules

State-of-the-art developments in metal and carbon-based semiconducting nanomaterials： applications and functions in spintronics, nanophotonics, and nanomagnetics

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Advances in Manufacturing 2017年第2期5卷 105-119页

作者： sergio Manzetti Francesco Enrichi Fjordforsk MS NanoFactory Midtun 6894 VangsnesNorway Computational Biology and Bioinformatics Uppsala University 75124 Uppsala Sweden Historical Museum of Physics and Research and Study Center Enrico Fermi 00184 Rome Italy Division of Materials Science Department of Engineering Sciences and Mathematics Lnlea University of Technology971 87 Lulea Sweden Department of Molecular and Nanosystems Sciences Ca' Foscari University of Venice 30172 Mestre VenetiaItaly Institute of Photonics and Nanotechnologies CSMFO Lab. &FBK-CMM IFN-CNR 38123 Povo Trento Italy

Nanomaterials composed of metals and metal alloys are the most valuable components in emerging micro- and nano-electronic devices and innovations to date. The composition of these nanomaterials, their quantum chemical and physical properties, and their production methods are in critical need of summarization, so that a complete state of the art of the present and future of nanotechnologies can be presented. In this review, we report on the most recent activities and results in the fields of spintronics, nanophotonics, and nanomagnetics, with particular emphasis on metallic nanoparticles in alloys and pure metals, as well as in organic combinations and in relation to carbon-based nanostructures. This review shows that the combinatory synthesis of alloys with rare metals, such as scandium, yttrium, and rare earths imparts valuable qualities to high-magnetic-field compounds, and provides unique properties with emphasis on nanoelectronic and computational components. In this review, we also shed light on the methods of synthesis and the background of spintronic, nanomagnetic, and nanophotonic materials, with applications in optics, diagnostics, nanoelectronics, and computational nanotechnology. The review is important for the industrial development of novel materials, and for summarizing both fabrication and manufacturing methods, as well as principles and functions of metallic nanoparticles.

关键词： Metal Alloy Nanoparticle Spintronics Nanophotonics Nanomagnetics Method Synthesis

Gorenstein injective sheaves

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Frontiers of Mathematics in China 2017年第1期12卷 87-95页

作者： sergio ESTRADA Alina IACOB Departamento de Matem~ticas Universidad de Murcia Murcia 30100 Spain Department of Mathematical Sciences Georgia Southern University Statesboro GA 3O460 USA

We define Gorenstein injective quasi-coherent sheaves, and prove that the notion is local in case the scheme is Gorenstein. We also give a new characterization of a Gorenstein scheme in terms of the total acyclicity o... 详细信息

关键词： Gorenstein injective Noetherian scheme

Moderate/severe traumatic brain injury as a trigger of chronic neurodegeneration in humans

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Neural Regeneration Research 2020年第7期15卷 1247-1248页

作者： sergio Bagnato Cristina Boccagni Unit of Neurophysiology and Unit for Severe Acquired Brain Injuries Rehabilitation Department Giuseppe Giglio Foundation

Traumatic brain injury(TBI)is the paradigmatic example of acute brain injury,defined as sudden and unexpected structural and/or functional damage to the *** western countries,TBI is a main cause of prolonged disability,and it is even more impactful because it very often affects young *** to past belief,the cerebral damage caused by TBI is not limited to the short temporal phase following the mechanical ***,moderate/severe TBI can trigger several mechanisms of neuronal damage that operate for months or years after the acute injury,potentially leading to neuronal loss and brain atrophy.

关键词： acute damage injury

Reactive pathways toward parasitic release of singlet oxygen in metal-air batteries

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npj Computational Materials 2021年第1期7卷 1135-1142页

作者： Adriano Pierini sergio Brutti Enrico Bodo Department of Chemistry University of Rome“La Sapienza”RomeItaly GISEL—Centro di Riferimento Nazionale per i Sistemi di Accumulo Elettrochimico di Energia FirenzeItaly

The superoxide disproportionation reaction is a key step in the chemistry of aprotic metal oxygen batteries that controls the peroxide formation upon discharge and opens the way for singlet oxygen *** we clarify the energy landscape of the disproportionation of superoxide in aprotic media catalyzed by group 1A *** analysis is based on ab initio multireference computational methods and unveils the competition between the expected reactive path leading to peroxide and an unexpected reaction channel that involves the reduction of the alkaline *** channels lead to the release of triplet and singlet O_(2).The existence of this reduction channel not only facilitates singlet oxygen release but leads to a reactive neutral solvated species that can onset parasitic chemistries due to their well-known reducing ***,we show that the application of moderate overpotentials makes both these channels accessible in aprotic batteries.

关键词： properties release singlet