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Relationship between vegetation structure and microenvironment in Fagus grandifolia *** forest relicts in Mexico

Journal of Plant Ecology 2018年第2期11卷 237-247页

作者： Ernesto ChRodríguez-Ramírez arturo Sánchez-González GregorioÁngeles-Pérez Laboratorio de Biogeografía y Sistemática Facultad de CienciasUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMéxico Laboratorio de Ecología de Poblaciones Centro de Investigaciones BiológicasUniversidad Autónoma del Estado de HidalgoCiudad UniversitariaCarretera Pachuca-Tulancingo Km.4.5Mineral de la Reforma 42184Hidalgo Postgrado en Ciencias Forestales Colegio de PostgraduadosMontecillo 56230TexcocoEstado de MéxicoMéxico

Aims Changes in the structure and composition of forests,whether caused by natural or anthropic events,alter the microenviron-ment,sometimes *** the local environment has a direct impact on basic ecological processes,this has become a key component of *** beech forests(Fagus grandi-folia ***)in the Sierra Madre Oriental are restricted to sites with specific climate,soils and topography,making them an ideal natural system for ecological *** objectives of this study were to identify the relationship between the microen-vironment and the tree and shrub structure and composition of Mexican beech forests in the state of Hidalgo,and to compare the floristic similarity of these forests on the country scale using data from seven *** Specimens were collected for a period of one year at all locali-ties in the state of Hidalgo where beech forests are *** each locality,five 400 m2 plots were established,and structural attributes(basal area,coverage,density and species richness)and six environmental variables were measured in the *** relationship between structure and microenvironment was estimated by simple correlation and canonic correspondence analysis(CCA).in addition,floristic similarity between different beech forest localities in the Sierra Madre Oriental was esti-mated by correspondence analysis(CA).Important Findings Twenty tree species and eight shrub species were identified;at all localities studied *** *** dominated the *** multivariate analysis indicated that(i)in the four localities in the state of Hidalgo,all microenvironmental variables except pH are related to the variation observed in species composition and structure;(ii)the El Gosco locality had both tree and shrub species and microenvironmental factors different from those observed in the Fagus forests at the other localities in the study and(iii)the localities studied in order to draw country-scale compa

关键词： Canonical correspondence analysis fagus forest floristic composition Mexico montane cloud forest richness

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Solanum sisymbrifolium *** BRESCIANO

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Natural Disaster Reduction in China 1988年第1期 167-172页

作者： arturo CRESCINI Centro Studi Naturalistici Bresciani

Solanum sisymbrifolium *** the province of Brescia(Northern Italy).The Author describesthe presence of the tropical south American species Solanum sisymbrifolium Lam.,collected on heaps of man-ganese minerals in the s... 详细信息

关键词： La Br Pi Solanum sisymbrifolium LAM.NEL BRESCIANO CIO

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Genomic medicine in gastroenterology:A new approach or a new specialty?

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World Journal of Gastroenterology 2015年第27期21卷 8227-8237页

作者： Sonia Roman arturo Panduro Department of Molecular Biology in Medicine Civil Hospital of Guadalajara "Fray Antonio Alcalde" Mexico and Health Sciences Center University of Guadalajara

Throughout history, many medical milestones have been achieved to prevent and treat human ***'s early conception of illness was naturally holistic or integrative. However, scientific knowledge was atomized into quantitative and qualitative research. In the field of medicine, the main trade-off was the creation of many medical specialties that commonly treat patients in advanced stages of disease. However, now that we are immersed in the post-genomic era, how should we reevaluate medicine? Genomic medicine has evoked a medical paradigm shift based on the plausibility to predict the genetic susceptibility to disease. Additionally, the development of chronic diseases should be viewed as a continuum of interactions between the individual's genetic make-up and environmental factors such as diet, physical activity, and emotions. Thus, personalized medicine is aimed at preventing or reversing clinical symptoms, and providing a better quality of life by integrating the genetic, environmental and cultural factors of diseases. Whether using genomic medicine in the field of gastroenterology is a new approach or a new medical specialty remains an open question. To address this issue, it will require the mutual work of educational and governmental authorities with public health professionals, with the goal of translating genomic medicine into better health policies.

关键词： Chronic diseases Nutritional genomics Obesity Liver disease Gastrointestinal diseases

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SUSTAINABLE HOUSE-SCALE PASSIVE RAINWATER CAPTURE LANDSCAPE IN THE DESERT SOUTHWEST

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Journal of Green Building 2014年第1期9卷 113-129页

作者： Abubaker Alamailes John Walton Priscilla Sandoval arturo Woocay Osvaldo Broesicke Civil Engineering Department The University of Texas at El Paso Instituto Tecnológico de Ciudad Juárez

A passive rainwater harvesting technique was used to design a sustainable landscape for a residential lot located in the desert. The design was adapted to the Desert Southwest region of the United States based on thirty years of daily historical climate data including precipitation and reference evapotranspiration (ET0). Four cities including El Paso, TX, Albuquerque, NM, Phoenix, AZ, and Pahrump, NV, were selected to represent the area. The residential lot was broken up into micro-watersheds reflecting the runoff of water from each separate portion of the house roof, driveway, and lawn area. The paper explains in detail the design steps for one of the micro-watersheds where water retention and infiltration structures were distributed throughout the soil area to capture stormwater runoff close to its source. A passive rainwater capture landscape was obtained by using the stormwater captured in the infiltration structures and stored in the surrounding soil. Native vegetation (shrubs and trees) will use this water exclusively for growth. These plants will not require watering once their root establishment period has passed, except in extreme droughts. Meanwhile, stormwater discharge from the lot will decrease and the groundwater recharge will increase. Results indicate that the current urban water budget can be made sustainable by replacing watering of landscape by municipal water with harvested stormwater. This results in a relatively lush and shady environment even in desert climates. The success is an artifact of the tendency of urban watersheds to increase the volume of stormwater relative to pre-development conditions.

关键词： stormwater harvesting micro-watershed sustainable use evapotranspiration infiltration trenches

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Immunologic, metabolic and genetic factors in hepatitis C virus infection

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World Journal of Gastroenterology 2014年第13期20卷 3443-3456页

作者： Nora A Fierro Karina Gonzalez-Aldaco Rafael Torres-Valadez Erika Martinez-Lopez Sonia Roman arturo Panduro Department of Molecular Biology in Medicine Civil Hospital of Guadalajara"Fray Antonio Alcalde" and Health Sciences CenterUniversity of GuadalajaraGuadalajara 44280JaliscoMexico

The mechanisms that regulate disease progression during hepatitis C virus(HCV)infection and the response to treatment are not clearly *** studies have demonstrated that a strong host immune response against HCV favors HCV *** addition,genetic factors and metabolic machinery,particularly cholesterol modulation,are involved in HCV *** is likely that the interplay between all of these factors contributes to the outcome of HCV *** recent years,the world has experienced its largest epidemic of *** and the United States are the leading sufferers from this epidemic at the global *** is associated with the development ofnumerous pathologies including hypercholesterolemia which is one of the eight most important risk factors for mortality in *** may be related to the course of HCV infection in this ***,we focus on the urgent need to study the progression of HCV infection in relation to ethnic *** are discussed that hold promise in identifying immune,metabolic and genetic factors that,in conjunction,could be therapeutic targets or predictors of the progression of HCV infection.

关键词： Hepatitis C virus Immune response Lipids Metabolism Genetics

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Drought and Spatiotemporal Variability of Forest Fires Across Mexico

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Chinese Geographical Science 2018年第1期28卷 25-37页

作者： Pompa-García MARíN Camarero J.JULIO Rodríguez-Trejo DANTE arturo Vega-Nieva DANIEL JOSE Facultad de Ciencias Forestales Universidad Juarez del Estado de Durango Durango 34120 MExico Instituto Pirenaico de Ecologia IPE-CSIC 50059 Spain Divisian de Ciencias Forestales Universidad Autonoma Chapingo Chapingo 56230 MExico

Understanding the spatiotemporal links between drought and forest fire occurrence is crucial for improving decision-making in fire management under current and future climatic conditions. We quantified forest fire activity in Mexico using georeferenced fire records for the period of 2005–2015 and examined its spatial and temporal relationships with a multiscalar drought index, the Standardized Precipitation-Evapotranspiration Index(SPEI). A total of 47975 fire counts were recorded in the 11-year long study period, with the peak in fire frequency occurring in 2011. We identified four fire clusters, i.e., regions where there is a high density of fire records in Mexico using the Getis-Ord G spatial statistic. Then, we examined fire frequency data in the clustered regions and assessed how fire activity related to the SPEI for the entire study period and also for the year 2011. Associations between the SPEI and fire frequency varied across Mexico and fire-SPEI relationships also varied across the months of major fire occurrence and related SPEI temporal scales. In particular, in the two fire clusters located in northern Mexico(Chihuahua, northern Baja California), drier conditions over the previous 5 months triggered fire occurrence. In contrast, we did not observe a significant relationship between drought severity and fire frequency in the central Mexico cluster, which exhibited the highest fire frequency. We also found moderate fire-drought associations in the cluster situated in the tropical southern Chiapas where agriculture activities are the main causes of forest fire occurrence. These results are useful for improving our understanding of the spatiotemporal patterns of fire occurrence as related to drought severity in megadiverse countries hosting many forest types as Mexico.

关键词： cluster drought forest fires geostatistics spatial clusters Standardised Precipitation-Evapotranspiration Index (SPEI)

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Characteristics of different charge transfer modes in upward flashes inferred from simultaneously measured currents and fields

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High Voltage 2020年第1期5卷 30-37页

作者： Lixia He Mohammad Azadifar Quanxin Li Marcos Rubinstein Vladimir A.Rakov arturo Mediano Davide Pavanello Farhad Rachidi Electromagnetic Compatibility Laboratory Swiss Federal Institute of Technology(EPFL)1015 LausanneSwitzerland Department of Atmospheric Physics Nanjing University of Information Science and TechnologyNanjingPeople's Republic of China University of Applied Sciences of Western Switzerland(HES-SO) 1400 Yverdon-les-BainsSwitzerland Department of Electrical Engineering Wuhan UniversityWuhanPeople's Republic of China Department of Electrical and Computer Engineering University of FloridaFloridaUSA Institute of Electronics and Mathematics National Research University Higher School of EconomicsMoscowRussia Department Electronics and Communication Engineering University of ZaragozaZaragozaSpain Institute of Sustainable Energy University of Applied Sciences of Western Switzerland(HES-SO)1950 SionSwitzerland

The authors present an analysis of different charge transfer modes during upward negative *** analysis includes a total number of 94 pulses that occurred during two upward negative flashes recorded at the Säntis *** pulses included 59 mixed-mode(MM)initial continuous current(ICC)pulses,17 M-component-type ICC(M-ICC)pulses,8 returnstroke pulses,and 10 classical M-component(MC)*** is found that the initial stage of the flash is responsible for the largest share of the total charge transferred to the *** results for the electric fields associated with the considered charge transfer modes are presented and *** stroke(RS)and MM pulses were simulated adopting the MTLE model,while MCs and M-ICC pulses were simulated using the guided wave model of Rakov et *** simulated results are shown to be in good agreement with simultaneous records of electric fields measured at a distance of 15 km from the Säntis *** inferred velocities for MCs and M-ICC pulses range from 2.0×10^(7) to 9.0×10^(7) m/s,and the corresponding junction point heights range from 1.0 to 2.0 *** inferred pulse velocities for RSs and MM pulses range from 1.3×10^(8) to 1.65×10^(8) m/*** inferred current attenuation constants of the MTLE model obtained in this study range from 0.3 to 0.8 km,lower than the value of 2 km previously suggested for RSs in downward *** obtained results support the assumption that the mode of charge transfer to the ground giving rise to MM pulses is similar to that of *** results are also in support of the generally assumed similarity between M-ICC pulses and classical MCs.

关键词： flash charge transfer

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Relativistic charged stellar modeling with a perfect fluid sphere

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Communications in Theoretical Physics 2023年第9期75卷 113-121页

作者： Joaquin Estevez-Delgado Joel arturo Rodríguez Ceballos Jorge Mauricio Paulin-Fuentes JoséVega Cabrera Antonio Rendón Romero Facultad de Ciencias Físico Matemáticas de la Universidad Michoacana de San Nicolás de Hidalgo Edificio BCiudad UniversitariaMorelia MichoacánCP 58040Mexico Facultad de Químico Farmacobiología de la Universidad Michoacana de San Nicolás de Hidalgo Tzintzuntzan No.173Col.MatamorosMorelia MichoacánC.P.58240Mexico División Académica de Ciencias Básicas de la Universidad Juárez Autónoma de Tabasco Carretera Cunduacán-Jalpa Km.1Col.La Esmeralda86690CunduacánTabascoMexico Facultad de Ingenieria Mecanica de la Universidad Michoacana de San Nicolás de Hidalgo Edificio W Ciudad UniversitariaCP 58030Morelia MichoacánMexico

In this report we present the generalization of a solution to Einstein's equations with perfect fluid for the case of Einstein–Maxwell with perfect *** effect of the charge is reflected by a parameter,ν,and its interval is determined by the positivity condition from the pressure in the interior of the *** is shown that the solution is stable according to the Zeldovich criteria as well as in relation to the criteria of the adiabatic *** compactness,u=GM/c^(2)R,of this charged model is greater than it is for the chargeless case as a result of the effect of the presence of the *** allows it to represent stars with a high compactness,in particular a graphic analysis is presented for the star SAX J1808.4-3658 with mass M=1.435M_(⊙)and radius R=7.07 *** these data and employing the solution,we obtain that the total maximum charge for the star is Q=2.4085×10^(20)C.

关键词： general relativity exact solutions charged fluid stars models

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Hardware Type 2 Fuzzy Logic Position Controller Based on Karnik-Mendel Algorithms

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Journal of Control Science and Engineering 2013年第1期1卷 1-12页

作者： Pedro Ponce-Cruz arturo Molina arturo Tellez-Velazquez Tecnologico de Monterrey Distrito Federal 07240 Mexico

This paper presents an analysis of the KM （Karnik-Mendel） algorithms performance under real time implementation using 3 types： the non-iterative, the iterative and the enhanced, and their feasibility for real-time interval type 2 fuzzy logic control system applications. The results are also compared against NT （Nie-Tan） method that is one of the fastest and simplest defuzzification methods. Because the DC （direct current） servo-motor is one of the most used motors in different industrial applications and the model of the motor is nonlinear, this motor was selected for validating the implementation in real time hardware. This DC motor is a perfect option for studying the real time performance of KM algorithms in order to show up its limits and possibilities for real-time control system applications. These methodologies are implemented in National Instruments LabVIEW FPGA （field programmable gate array） module hardware which is one of the most used platforms in the industry. The results show that the E-KM （enhanced KM） algorithm and the NT method present good results for implementing real-time control applications in real time hardware. Although fuzzy logic type 2 is a good option for working with nonlinear and noise from the sensors, the defuzzification method has to react in a short period of time in order to allow good control response. Hence, a complete study of defuzzification is needed for improving the real time implementations of fuzzy type 2.

关键词： Fuzzy logic type 2 KM algorithms NT method defuzzification type-reduction DC servo-motor control.

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Fault Pattern Diagnosis and Classification in Sensor Nodes Using Fall Curve

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Computers, Materials & Continua 2022年第7期72卷 1799-1814页

作者： Mudita Uppal Deepali Gupta Divya Anand Fahd S.Alharithi Jasem Almotiri arturo Mansilla Dinesh Singh Nitin Goyal Chitkara University Institute of Engineering and Technology Chitkara UniversityPunjabIndia Computer Science&Engineering Department Lovely Professional UniversityJalandharPunjabIndia Department of Computer Science College of Computers and Information TechnologyTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Higher Polytechnic School/Industrial Organization Engineering Universidad Europea del AtlánticoIsabel Torres 2139011SantanderSpain Department of Project Management Universidad Internacional IberoamericanaCampeche24560Mexico Computer Science and Engineering Department Deenbandhu Chhotu Ram University of Science and TechnologyMurthalSonipatHaryanaIndia

The rapid expansion of Internet of Things(IoT)devices deploys various sensors in different applications like homes,cities and *** applications depend upon the accuracy of sensor ***,it is necessary to predict faults in the sensor and isolate their cause.A novel primitive technique named fall curve is presented in this paper which characterizes sensor *** technique identifies the faulty sensor and determines the correct working of the *** sources of sensor faults are explained in detail whereas various faults that occurred in sensor nodes available in IoT devices are also presented in tabular *** prediction in digital and analog sensors along with methods of sensor fault prediction are *** are several advantages and disadvantages of sensor fault prediction methods and the fall curve ***,some solutions are provided to overcome the limitations of the fall curve *** this paper,a bibliometric analysis is carried out to visually analyze 63 papers fetched from the Scopus database for the past five *** novelty is to predict a fault before its occurrence by looking at the fall *** sensing of current flow in devices is important to prevent a major ***,the fall curves of ACS712 current sensors configured on different devices are drawn for predicting faulty or non-faulty *** analysis result proved that if any of the current sensors gets faulty,then the fall curve will differ and the value will immediately drop to *** evaluation metrics for fault prediction are also described in this *** last,this paper also addresses some possible open research issues which are important to deal with false IoT sensor data.

关键词： Fault identification fault classification IoT sensor nodes analog sensors digital sensors fall curve

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