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Efficiency and effectiveness of systems for the treatment of domestic wastewater based on subsurface flow constructed wetlands in Jarabacoa, Dominican Republic

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Water Science and Engineering 2024年第2期17卷 118-128页

作者： Yvelisse Pérez Enmanuel Vargas Daniel Garcia-cortes William Hernandez Humberto Checo Ulises Jauregui-Haza Area de Ciencias Basicas y Ambientales Instituto Tecnologico de Santo Domingo(INTEC)Avenida de Los Proceres 49Los Jardines del NorteSanto Domingo 10602Dominican Republic Ministry of Environment and Natural Resources Calle Cayetano Germosen esq.Ave.LuperonEl PedregalSanto Domingo 11107Dominican Republic Plan Yaque Calle Estela Geraldino 14 AltosJarabacoa 41000Dominican Republic Institute of Technologies and Applied Sciences University of HavanaHavana 10400Cuba

Constructed wetlands(CwW)are well known nature-based systems for water *** study evaluated the efficiency and effectiveness of seven domestic wastewater treatment systems based on horizontal flow CWs in Jarabacoa,the Dominican *** results showed that the CWs were efficient in reducing the degree of contamination of wastewater to levels below the Dominican wastewater discharge standards for parameters such as the 5-day biochemical oxygen demand(BOD5)and chemical oxygen demand,but not for the removal of phosphorus and fecal *** addition,a horizontal flow subsurface wetland in the peri-urban area el Dorado was evaluated in terms of the performance of wastewater treatment in tropical climatic *** concentrations of heavy metals,such as zinc,copper,chromium,and iron,were found to decrease in the effluent of the wetland,and the concentrations for nickel and manganese tended to *** levels of heavy metals in the effluent were lower than the limit values of the Dominican wastewater discharge *** construction cost of these facilities was around 200 USD per population equivalent,similar to the cost in other countries in the same *** study suggested some solutions to the improved performance of CWs:selection of a microbial flora that guarantees the reduction of nitrates and nitrites to molecular nitrogen,use of endemic plants that bioaccumulate heavy metals,combination of constructed wetlands with filtration on activated carbon,and inclusion of water purification processes that allow to evaluate the reuse of treated water.

关键词： Domestic wastewater Constructed wetland BOD COD Pathogens Heavy metals

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巴赫《第五无伴奏大提琴组曲BWV 1001》前奏曲的演绎风格与诠释

巴赫《第五无伴奏大提琴组曲BWV 1001》前奏曲的演绎风格与诠释

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作者： Cristhian Camilo cortes Rivera 成都大学

学位级别：硕士

对演奏者来说,对于作品的演奏诠释是一种挑战。要想使作品被清晰地理解,就必须努力实现作品中音乐语言的正确传递。为正确的诠释和演奏作品,就需要了解其和声结构、弓法和演奏(运弓)技巧。因此,对不同手稿和版本的搜寻,和对作品中每部... 详细信息

对演奏者来说,对于作品的演奏诠释是一种挑战。要想使作品被清晰地理解,就必须努力实现作品中音乐语言的正确传递。为正确的诠释和演奏作品,就需要了解其和声结构、弓法和演奏(运弓)技巧。因此,对不同手稿和版本的搜寻,和对作品中每部分对于乐句中弓法的运用的分析,就变得重要。不同手稿对于鞠躬和发音的不同标示,使不同版本之间会产生相反表达。在贝蒂娜·施韦默和道格拉斯·伍德富尔·哈里斯编写的《约翰·塞巴斯蒂安·巴赫六首大提琴组曲BWV 1007-1012》中可以窥知著名大提琴家们对于不同版本弓法的选择,演奏技法的运用,以及他们对于不同版本的看法。根据对不同手稿中不同的演奏意图和要求达成了共识,和谱面上弓法的标示,使得这一版本成为了巴赫第五组曲中前奏曲弓法与演奏技法的权威版本。基于对作品的分析,本文的目的在于,在一系列动机中找到一致性,以建立最合适的演奏技法。虽然这些手稿大都提供的都是巴洛克风格的演奏建议;但同时也考虑到了当代表演者,并根据现代大提琴及其风格提出了建设性的意见。同时,结合对音乐风格的考量,在掌握了演奏技巧后,演奏者会对作品有更深刻的理解。这些理解会引导演奏者以更诗意和深刻的方式,更好的演绎巴赫的作品。

关键词：诠释风格考虑前奏大提琴独奏音乐理论

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Portal vein arterialization in 25 liver transplant recipients:A Latin American single-center experience

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World Journal of Transplantation 2024年第2期14卷 135-147页

作者： Nicolas Andres cortes-Mejia Diana Fernanda Bejarano-Ramirez Juan Jose Guerra-Londono Diego Rymel Trivino-Alvarez Raquel Tabares-Mesa Alonso Vera-Torres Division of Anesthesiology Critical Care Medicineand Pain MedicineThe University of Texas MD Anderson Cancer CenterHoustonTX 77030United States Transplant and Hepatobiliary Surgery Department Fundacion Santa Fe de BogotaBogota 110111Colombia General Surgery Department Fundacion Santa Fe de BogotaBogota 110111Colombia

BACKGROUND Portal vein arterialization(PVA)has been used in liver transplantation(LT)to maximize oxygen delivery when arterial circulation is compromised or has been used as an alternative reperfusion technique for complex portal vein thrombosis(PVT).The effect of PVA on portal perfusion and primary graft dysfunction(PGD)has not been *** patients receiving PVA and LT at the Fundacion Santa Fe de Bogota between 2011 and 2022 were *** account for the time-sensitive effects of graft perfusion,patients were classified into two groups:prereperfusion(pre-PVA),if the arterioportal anastomosis was performed before graft revascularization,and postreperfusion(post-PVA),if PVA was performed *** pre-PVA rationale contemplated poor portal hemodynamics,severe vascular steal,or ***-PVA was considered if graft hypoperfusion became *** interventions were attempted before PVA.

关键词： Liver transplantation Portal vein arterialization Arteriovenous anastomoses Portal hypertension Portal vein thrombosis Spontaneous portosystemic shunts Vascular steal phenomenon Primary graft dysfunction Early allograft dysfunction

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Average Current Control with Internal Model Control and Real-time Frequency Decoupling for Hybrid Energy Storage Systems in Microgrids

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 511-522页

作者： Alejandro Latorre Wilmar Martinez Camilo A.cortes EMC-UN Research Group Universidad Nacional de ColombiaBogotaColombia KU Leuven Campus DiepenbeekEnergy Ville 1-GenkBelgiumDiepenbeekBelgium

Among hybrid energy storage systems(HESSs),battery-ultracapacitor systems in active topology use DC/DC power converters for their *** are part of the solutions designed to improve the operation of power systems in different *** the residential microgrid applications,a multilevel control system is required to manage the available energy and interactions among the microgrid *** this purpose,a rule-based power management system is designed,whose operation is validated in the simulation,and the performances of different controllers are compared to select the best strategy for the DC/DC *** average current control with internal model control and real-time frequency decoupling is proposed as the most suitable controller according to the contemplated performance parameters,allowing voltage regulation values close to 1%.The results are validated using real-time hardware-in-the-loop(HIL).These systems can be easily adjusted for other applications such as electric vehicles.

关键词： Internal model control energy management system(EMS) hybrid energy storage system(HESS) microgrids real-time frequency decoupling

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Sizing and Siting of Battery Energy Storage Systems:A Colombian Case

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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 700-709页

作者： Alvaro Avendano Pena David Romero-Quete Camilo A.cortes Department of electrical and electronics Engineering Universidad Nacional de ColombiaBogotaColombia

This paper presents a mixed-integer linear programming(MILP)formulation for sizing and siting of battery energy storage systems(BESSs).The problem formulation seeks to minimize both operation costs and BESS *** proposed model includes restrictions of the conventional securityconstrained unit commitment problem,a piece-wise linear approximation to model power losses,and a linear model of hydro generation *** proposed model is tested in a 6-bus test system and a 15-bus system representing the Colombian power *** the two studied systems,simulation results show that the reduction of operation costs due to the installation of BESSs compensates the investments,under some of the considered technical cost ***,results show that adequate sizing and siting of BESSs reduce renewable energy curtailment in the Colombian power system with high penetration of fluctuating renewable generation.

关键词： Battery energy storage curtailment sizing and siting renewable energy

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Simulated predation pressure in Pelobates Cultripes tadpoles modulates morphology at the metamorphic stage

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Current Zoology 2019年第6期65卷 651-656页

作者： Francisco Javier ZAMORA-CAMACHO Susana cortes-MANZANEOUE Pedro ARagON Museo Nacional de Ciencias Naturales(MNCN-CSIC) MadridSpain

Studies on the impacts of variation of biotic interactions at key life cycle stages are crucial to understand the interface between ecological and developmental *** exert a major impact on prey *** direct consumption entails the greatest effect,predators can affect prey by means of other *** instance,injuries inflicted by failed predation attempts can jeopardize prey fitness,even beyond the *** anuran tadpoles,failed predation typically results in partial tail loss,which is known to reduce swimming ***,the potential consequences of tadpole partial tail loss after metamorphosis remain *** tail materials could be important in conforming metamorph body,we assess the effects of tadpole partial tail loss on metamorph body size in Iberian spadefoot toads Pelobates *** clipped 55%tail length of pre-tail-resorption stage anesthetized tadpoles,and compared their body size as metamorphs with anesthetized and non-anesthetized non-tail-clipped ***,we tested whether tail length correlated with metamorph body size of individuals of the control *** tadpoles produced smaller metamorphs than both controls(the bdy size of metamorphs from both controls was similar),which could incur costs in mid-term survival or time to first *** effect could be particularly important in areas with introduced predators,if autochthonous tadpoles lack defenses against *** suggest that materials resorbed from tadpole tail tissues might be reallocated into metamorph body,according to the negative effect of shorter tails in a correlational analysis,and clipped tails in an experimental test,on metamorph body size.

关键词： amphibian anuran body condition body size failed predation partial tail loss

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Optimal microgrid planning for enhancing ancillary service provision

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Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 862-875页

作者： Sergio F.CONTRERAS Camilo A.cortes Johanna M.A.MYRZIK Institute of Automation Technology University of BremenOtto-Hahn-Allee 1 NW1/M1050(70)28359 BremenGermany Department of electrical and electronics Engineering Universidad Nacional de ColombiaCarrera 30 Calle 45.Ciudad Universitaria Edificio 453Bogota′Colombia

Microgrids have presented themselves as an effective concept to guarantee a reliable,efficient and sustainable electricity delivery during the current transition era from passive to active distribution ***,microgrids could offer effective ancillary services(AS)to the power utility,although this will not be possible before the traditional planning and operation methodologies are ***,a probabilistic multi-objective microgrid planning(POMMP)methodology is proposed in this paper to contemplate the large number of variables,multiple objectives,and different constraints and uncertainties involved in the microgrid *** planning methodology is based on the optimal size and location of energy distributed resources with the goal of minimizing the mismatch power in islanded mode,while the residual power for AS provision and the investment and operation costs of the microgrid in grid-connected mode are maximized and minimized,*** that purpose,probabilistic models and a true multi-objective optimization problem are implemented in the *** methodology is tested in an adapted PG&E 69-bus distribution system and the non-dominated sorting genetic algorithmⅡ(NSGA-Ⅱ)optimization method and an analytic hierarchy process for decision-making are used to solve the optimization problem.

关键词： Microgrid Ancillary services(AS) Planning Multi-objective optimization Decision-making

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Associations between testicular development and fetal size in the pig

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Journal of Animal Science and Biotechnology 2022年第5期13卷 1340-1350页

作者： Claire Stenhouse Yennifer cortes-Araya F.Xavier Donadeu Cheryl J.Ashworth Functional Genetics and Development Division The Roslin Institute and Royal(Dick)School of Veterinary StudiesUniversity of EdinburghMidlothianUK Department of Animal Science Texas A&M University440 Kleberg CenterCollege StationTX 77843-2471USA

Background:Impaired reproductive performance is the largest contributing factor for the removal of boars from commercial *** growth restricted piglets represent 25%of the total number of piglets born and have impaired reproductive *** study aimed to improve the understanding of temporal changes in testicular gene expression during testes development in fetuses of different *** lightest and closest to mean litter weight(CTMLW)male Large White×Landrace littermates were collected at gestational days(GD)45,60 and 90(n=5-6 litters/GD).Results:Testes weight and testes weight as a percentage of fetal weight were not associated with fetal size at GD60 or *** plasma testosterone was not associated with fetal size at *** was no association between fetal size and seminiferous tubule area and number,number of germ or Sertoli cells per *** lightest fetuses tended to have wider seminiferous tubules compared to the CTMLW fetuses at GD90(P=0.077).The testicular expression of KI67(P≤0.01)and BAX:BCL2 ratio(P=0.058)mRNAs decreased as gestation *** SPP1 mRNA expression was observed at GD60 when compared with GD45 and 90(P≤0.05).Lower expression of DMRT1 and SPP1(Pel insights into the expression profiles of genes associated with testicular development and ***,these data suggest that programming of reproductive potential in IUGR boars occurs late in gestation,providing a platform for further mechanistic investigation.

关键词： Fetal growth Intrauterine growth restriction(IUGR) Porcine Pregnancy Testes

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Sexual dimorphism in immune response： Testing the hypothesis in an insect species with two male morphs

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Insect Science 2013年第5期20卷 620-628页

作者： Gloria Ruiz-Guzman Jorge Canales-Lazcano Jesus Guillermo Jimenez-cortes Jorge Contreras-Garduno Centro de Investigacion Sobre Enfermedades Infecciosas Instituto Nacional de Salud Publica Av. Universidad No. 655 C. P. 62100 Cuernavaca Morelos Departamento de Biologia Divisi6n de Ciencias Naturales y Exactas Universidad de Guanajuato Guanajuato Departamento de Ecologia Evolufiva Instituto de Ecologia Universidad Nacional Autonoma de Mexico Apdo. Postal 70-275 04510 Mexico D. F. Mexico

It has been proposed that given that males should invest in sexual traits at the expense of their investment in immune response, females are better immunocompetent than males. Typically, this idea has been tested in monomorphic species, but rarely has been evaluated in polymorphic male species. We used Paraphlebia zoe, a damselfly with two male morphs： the black-winged morph （Black-W） develop black spots as sexual traits and the hyaline-winged morph （Hyaline-W） resembles a female in size and wings color. We predicted that Black-W should have a lower immune response than Hyaline-W, but that the latter males should not differ from females in this respect. Nitric oxide （NO） and phenoloxidase （PO） production, as well as hemolymph protein content, were used as immune markers. Body size （wing length） was used as an indicator of the male condition. The results show that, as we predicted, females and Hyaline-W had higher values of NO than Black-W, corresponding to differences in size. However, the opposite was found in relation to PO production. Females had the highest levels of hemolymph protein content, whereas no differences were found between Black-W and Hyaline-W. These results partially support the sexual selection hypothesis and are discussed in the context of the life history of this species. Black-W, Hyaline-W, and females could express the immune markers that are prioritized by their particular condition, and probably neither of them could express all immune markers in an elevated manner, as this would result in an excessive accumulation of free radicals.

关键词： immune response male morphs Paraphlebia zoe polymorphic species,territoriality trade-off

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GekkoFS—A Temporary Burst Buffer File System for HPC Applications

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Journal of Computer Science & Technology 2020年第1期35卷 72-91页

作者： Marc-AndréVef Nafiseh Moti Tim Süβ Markus Tacke Tommaso Tocci Ramon Nou Alberto Miranda Toni cortes AndréBrinkmann Zentrum für Datenverarbeitung Johannes Gutenberg University MainzMainz 55128Germany Barcelona Supercomputing Center Barcelona 08034Spain Computer Architecture Department Universitat Politècnica de CatalunyaBarcelona 08034Spain

Many scientific fields increasingly use high-performance computing(HPC)to process and analyze massive amounts of experimental data while storage systems in today's HPC environments have to cope with new access *** patterns include many metadata operations,small I/O requests,or randomized file I/O,while general-purpose parallel file systems have been optimized for sequential shared access to large *** buffer file systems create a separate file system that applications can use to store temporary *** aggregate node-local storage available within the compute nodes or use dedicated SSD clusters and offer a peak bandwidth higher than that of the backend parallel file system without interfering with ***,burst buffer file systems typically offer many features that a scientific application,running in isolation for a limited amount of time,does not *** present GekkoFS,a temporary,highly-scalable file system which has been specifically optimized for the aforementioned use *** provides relaxed POSIX semantics which only offers features which are actually required by most(not all)*** is,therefore,able to provide scalable I/O performance and reaches millions of metadata operations already for a small number of nodes,significantly outperforming the capabilities of common parallel file systems.

关键词： distributed file system high-performance computing(HPC) burst buffer POSIX(portable operating system interface)

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