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Morphological and Structural Effect of Aluminum on Macroporous Silicon Layers

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材料科学与工程（中英文版） 2010年第8期4卷 55-59页

作者： Danilo roque-Huanca Javier Ramirez-Fernandez Walter Jaimes-Salcedo Microelectronic Laboratory of Polytechnic school of Sao Paulo University Sao Paulo 05508-900 Brazil

The Role of Mutual Support Groups for the Control of Diabetes in a Mexican City: Achievements and Limitations from the Patients’ Perspective

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Health 2014年第15期6卷 1984-1993页

作者： Luz María Tejada-Tayabas María Judith rios Lugo Faculty of Nursing Autonomus University of San Luis Potosi San Luis Potosí México

Background: Mutual Support Groups (MSG) provides to the patient, the ability to effective self-management behaviors, such as taking prescribed medications, following diet and exercise regimens, self-monitoring, and coping emotionally with the rigors of living with diabetes. Physicians, nurses and health promoters from public primary Health Care Centers (HCC) are responsible for providing follow-up care through MSGs. However, although the MSG program has been carried out, in the last decade Mexico presents the most alarming statistics in the prevalence and complications of Diabetes Mellitus type II (DM-II), suggesting a low impact of MSG in the strategy to support the effective control of the disease. Objetive: The aim of this work was to assess whether knowledge or benefits of effective management to control of DM-II, also to identify strengths and limitations of MSGs, in six different Health Care Centers (HCC), in San Luis Potosi, Mexico. This research provides an overview of patients’ perception, and significant issues that demand to adjust MGSs strategies, with the goal of exceed the expectations of current health statistics. Methods: A qualitative evaluation was carried out, with an ethnographic approach design. The study included 28 diabetic persons, (21 women and 7 men from ruraland urban carecenters). Semi-structured interviews, non-participant observation, and structured content analysis were used. Results: Support groups give patients a way to address emotional issues, and learn about their disease and self-care, although some patients consider participation an inconvenient obligation. Support group users mention barriers such as lack of continuity in support group activities, inconvenient meeting times, and the difficulty of commuting to attend group sessions. They also mention that overworked health care workers find it difficult to provide leadership to keep the group going. These issues have multiple implications for the success of strategies to control

关键词： Mutual Support Group Diabetes Mellitus Qualitative Research Health Care Services Mexico

Mathematical Models for Flow of Chyme during Gastrointestinal Endoscopy

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Applied Mathematics 2011年第5期2卷 600-607页

作者： Ranadhir Roy Fabiola rios Daniel N. Riahi 不详

Intestinal infection has become a common disease in human and endoscopy can be a powerful means in diagnosis of intestinal illnesses. Mathematical models are developed for an inserted endoscope on the flow of chyme in the small intestine considering a Newtonian incompressible fluid flow, under an axisymmetric condition, in a cylindrical annulus between the small intestine and the endoscope. We obtain novel mathematical expressions for the pressure drop, forces exerted by the endoscope on the flow of chyme, and the force exerted by the chyme on the intestine for one wave length of the peristaltic rush wave. We also investigate and calculate the flow velocity and pressure for different flow rates and the wave lengths. The results are presented, and discussed for the cases and conditions under which pressure, pressure drop can be positive or negative and the forces can be acted either by the intestine or endoscope on the flow or vice-versa.

关键词： Mathematical Models Gastrointestinal Chyme Flow Endoscopy Flow Modeling Newtonian Incompressible Fluid Flow

On the use of ferroelectric material LiNbO3 as novel photocatalyst in wastewater-fed microbial fuel cells

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Particuology 2017年第5期15卷 147-155页

作者： N.Touach V.M.Ortiz-Martinez M.J.Salar-Garcia A.Benzaouak F.Hernandez-Fernandez A.P.de rios M.El Mahi E.M.Lotfi Laboratory of Mechanics Processes and Industrial Process Team Chemical Sciences ENSET Mohammed V University in Rabat Morocco School of Chemical and Environmental Engineering Polytechnic University of Cartagena Campus Muralla Del Mar Murcia Spain University of Murcia Chemical Engineering Department Campus de Espinardo E-30071 Murcia Spain

In this work, the use of lithium niobate （LiNbO3）, a ferroelectric and photocatalyst material, is investi- gated as a new type of cathode catalyst for wastewater-fed single-chamber microbial fuel cells （MFCs）. Carbon cloth electrodes coated with LiNbO3 were studied with and without UV-vis irradiation to assess its photocatalytic behavior in these devices. The synthesized phase of LiNbO3 was characterized by X- ray diffraction, differential scanning calorimetry, particle size distribution, and transmission electron microscopy analyses. The MFC containing a LiNbO3-based cathode exhibited a maximum open circuit potential and power output of 400 mV and 131 mW/m^3, respectively, under irradiation. This cathode configuration also achieved the maximum chemical oxygen demand removal of 84% after 120 h of MFC operation. These results show that ferroelectric materials such as LiNbO3 could be used as cathode cat- alysts in MFC devices. As a complementary analysis, the removal of the heavy metals detected in the wastewater was also monitored.

关键词： Lithium niobate Ferroelectric material Photocatalyst Microbial fuel cell (MFC)Power outputWastewater treatment

Vapor-Liquid Equilibrium of Ethyl Acetate+C_nH_(2n+1)OH(n=1,2,3) Binary Systems at 0.3 MPa

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Chinese Journal of Chemical Engineering 2012年第4期20卷 723-730页

作者： SUSIAL P. RODRIGUEZ-HENRIQUEZ J.J. SOSA-ROSARIO A. rios-SANTANA R. School of Industrial and Civil Engineering University of Las Palmas de Gran CanariaCanary IslandsSpain

Vapor-liquid equilibrium data for the binary systems of ethyl acetate + methanol,ethyl acetate + ethanol and ethyl acetate + 1-propanol at 0.3 MPa were *** experimental data were verified with the point-to-point test of van Ness(1973).All these systems present an azeotropic point at 0.3 MPa that increases in ester composition for longer alcohol *** UNIFAC in different versions and ASOG prediction models were applied.

关键词： vapor-liquid equilibrium vapor-liquid equilibrium isobaric data ethyl ester alcohol

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认知无线电网络中基于博弈论的合作频谱感知

认知无线电网络中基于博弈论的合作频谱感知

作者： Jorge Abraham rios Suarez 哈尔滨工业大学

学位级别：硕士

当前,新无线设备的增长增加了资源的稀缺性,而认知无线电网络为频谱需求的扩大提供开创性的答案。本文的主要思想是频谱传感的概念,它包含对主要用户存在检测,因为影响系统如阴影、空间多样性和多路径等现象,下一个关键概念是合作,即所... 详细信息

当前,新无线设备的增长增加了资源的稀缺性,而认知无线电网络为频谱需求的扩大提供开创性的答案。本文的主要思想是频谱传感的概念,它包含对主要用户存在检测,因为影响系统如阴影、空间多样性和多路径等现象,下一个关键概念是合作,即所有用户相互交互,以便检测以前所有现象的效果,最后是博弈理论的概念,它呈现社会,经济或任何类型的问题外推成博弈,在这种情况下,基于合作决策是比较合适的。研究的重点是用户对具有多个SU和多个主要用户的认知无线电网络中的协同频谱传感和接入策略。该方法提出每个用户根据自己的业务需求,与其他用户共同决定接入和感知的信道,另外还可以决定接入哪个信道。当用户没有数据要传输时,可以节省能量以备将来传输。首先,本研究探讨了基于流量需求的合作策略,即每个用户在确定的时间跨度中感知一个通道。该联盟具有不可转让的实用程序,其中所有用户都会获得与联盟对应的值,该值将用于计算吞吐量和能源效率。在这种情况下,联盟组建是一个高度复杂的问题,很难使用,为了克服这种复杂性,提出了一种新的联盟组建算法。结果表明,该算法具有高能效的高通量。然后,通过在整个传感时间中感应多个通道,提高了策略复杂性,从而扩展了合作范围。博弈设置为不可转让的实用程序重叠博弈。为了实现纳什稳定结构,对分析算法进行了修改。实践证明,该算法在有限重复次数后能够稳定,提高了频谱效率。该算法要求用户之间最佳的信息交换和迭代编号。与不相交算法和重叠形成算法相比,实现高吞吐量。本文分析自适应传输功率控制方案,以在保证较高吞吐量的同时降低传输能耗。性能评估考虑了影响算法性能的几个不同因素,如用户数、流量需求和能量效率下界。最后给出了重叠联盟结构的快照和实现不同算法时的迭代次数。仿真结果表明,该算法在受用户收益影响的系统吞吐量方面优于其他算法。

关键词：频谱感知博弈论重叠联盟形成效率

Tropical tree community composition and diversity variation along a volcanic elevation gradient

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Journal of Mountain Science 2022年第12期19卷 3475-3486页

作者： Ruben MARTINEZ-CAMILO Manuel MARTINEZ-MELENDEZ Nayely MARTINEZ-MIELENDEZ Derio Antonio JIMENEZ-LOPEZ Mauricio JOSE-rios Unidad Villa Corzo Facultad de IngenieríaUniversidad de Ciencias y Artes de Chiapas30520 Villa CorzoChiapasMexico Instituto de Ciencias Biológicas Universidad de Ciencias y Artes de Chiapas29039 Tuxtla GutiérrezChiapasMexico Eizia A.C. 29045 Tuxtla GutiérrezChiapasMexico Departamento de Conservación de la Biodiversidad El Colegio de la Frontera Sur29290 San Cristóbal de las CasasChiapasMexico Orquidiario y Jardín Botánico de Comitán Secretaría de Medio Ambiente e Historia Natural30106 Comitán de DomínguezChiapasMexico Instituto de Investigación en Gestión de Riesgos y Cambio Climático Universidad de Ciencias y Artes de Chiapas29039 Tuxtla GutiérrezChiapasMexico

Unraveling the factors that determine variation of diversity in tropical mountain systems is a topic for debate in plant *** is especially true in areas where topography is complex due to volcano elevational gradients and where forests are vulnerable to human *** this study we used a set of climatic(temperature,rainfall,and radiation solar),topographic(elevation,slope aspect,and slope orientation)and human disturbance variables to determine their effect on diversity and composition patterns of a tree community,considering three slope aspects of a tropical volcano in southeastern *** sampled trees in seventy 0.1-ha plots distributed on three slope aspects of the Tacanávolcano along an elevational gradient of 1500 to 2500 *** determined diversity patterns(general tree richness,exponential of Shannon index,and pioneer species richness)with linear regression models,and for beta diversity,we used a dissimilarity index(within and between elevational bands 100 m wide).The effect of a set of environmental and human disturbance variables on tree diversity and community composition was analyzed with general linear models and multivariate analyses,*** registered 2,949 individual trees belonging to 176 species and *** average species richness and alpha diversity per plot were 13(standard deviation±6)and 9(±5),*** tree richness and alpha diversity increased in the middle part(unimodal patterns)of the elevational gradient,but pioneer species richness decreased linearly with *** variance explained by general linear models was greater in richness(32%)than in alpha diversity(25.3%).The most important predictor variables were temperature(elevational gradient),which explained the unimodal pattern(richness and alpha diversity increase at intermediate levels of temperature),and slope orientation,which explained the increase in richness and alpha diversity toward the geographic *** temperature had a signific

关键词： Composition Environmental gradient Tree diversity patterns Tropical humid cloud forest Tropical volcanoes

Diversity and seasonal variation of ground and understory spiders from a tropical mountain cloud forest

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Insect Science 2020年第4期27卷 826-844页

作者： Emmanuel F.Campuzano Guillermo Ibarra-Nunez Salima Machkour-M Rabet Alejandro Moron-rios Maria Luisa Jimenez Colegio de la Frontera Sur(ECOSUR) Unidad TapachulaTapachulaChiapasMexico ECOSUR Unidad ChetumalChetumalQuintana RooMexico ECOSUR Unidad CampecheCampecheCampecheMexico Centro de Investigaciones Biologicas del Noroeste(CIBNOR) La PazBaja California SurMexico

We made intensive samplings to study the seasonal response of spiders across different forest strata(ground and understory)in a tropical mountain cloud forest from *** sampled spiders from ten plots in six sampling events during the dry and rainy season,to analyze their abundance,structure(distribution of abundance among species),diversity and the response of the five dominant species at each *** demonstrated that seasonal patterns of spider communities differed among strata,revealing a complex spatiotemporal ***,structure,diversity of ground spiders,as well as the responses of four dominant species at this stratum,showed low seasonal *** contrast,a strong seasonal variation was observed for the understory assemblage,with lowest abundance and highest diversity in the rainy season,and different assemblage structures for each *** patterns of each assemblage seem linked to the responses of their dominant *** found high co-occurrence among most of the ground dominant species with similar habitat use and with multivoltine patterns,contrasting with low co-occurrence among most of the understory dominant species with similar habitat use and univoltine *** results showed that the spiders’assemblages of tropical mountain cloud forest(opposed to what is found in temperate and boreal forests)increase their species richness with the height,and that their responses to seasonal change differ between *** programs of these habitats should consider the spatial and temporal variations found here,as a better understanding of their ecological dynamics is required to support their sustainable management.

关键词： community structure El Triunfo Biosphere Reserve interspecific competition Mexico temporal change vertical stratification

Sudden death in a patient with a short PR interval and subsequent sudden onset of a typical Tako-tsubo pattern

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Open Journal of Internal Medicine 2013年第3期3卷 95-97页

作者： Francisco R. Breijo-Marquez Manuel Pardo rios Conmemorative Hospital East Boston USA School of Medicine Murcia Spain

The Tako-tsubo cardiomyopathy, also known as transient apical dysfunction, transient apical dyskinesia, stress-induced cardiomyopathy or broken heart syndrome, is a type of nonischemic cardiomyopathy in which there is a sudden temporary weakening of the myocardium. The PR interval reflects the time the electrical impulse takes to travel from the sinus node through the AV node and entering the ventricles. The PR interval is therefore a good estimate of AV node function. Its normal values are between 0.120 - 0.200 seconds. When its length is lesser than 0.120 seconds, we speak as a short PR-interval. This event has a great capacity for severe cardiac arrhythmia production. Both entities can be very dangerous, separately. When they are together in the same individual, the consequences could be deadly.

关键词： Takotsubo Disease Short PR-Interval Lown-Ganong-Levine Tachycardias