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Planar matrices and arrays of Feynman diagrams

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Communications in Theoretical Physics 2024年第3期76卷 15-32页

作者： Freddy Cachazo alfredo Guevara Bruno Umbert Yong Zhang Perimeter Institute for Theoretical Physics WaterlooON N2L 2Y5Canada Department of Physics and Astronomy University of WaterlooWaterlooON N2L 3G1Canada CECs Valdivia y Departamento de Física Universidad de ConcepciónCasilla 160-CConcepciónChile Center for the Fundamental Laws of Nature Society of Fellows and Black Hole InitiativeHarvard UniversityCambridgeMA 02138United States of America Department of Applied Mathematics Western UniversityLondonON N6A 5B7Canada cas Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesNo.19A Yuquan RoadBeijing 100049China

Recently,planar collections of Feynman diagrams were proposed by Borges and one of the authors as the natural generalization of Feynman diagrams for the computation of k=3 biadjoint *** collections are one-dimensional arrays of metric trees satisfying an induced planarity and compatibility *** this work,we introduce planar matrices of Feynman diagrams as the objects that compute k=4 biadjoint *** are symmetric matrices of metric trees satisfying compatibility *** introduce two notions of combinatorial bootstrap techniques for finding collections from Feynman diagrams and matrices from *** applications of the first,we find all 693,13612 and 346710 collections for(k,n)=(3,7),(3,8)and(3,9),*** applications of the second kind,we find all90608 and 30659424 planar matrices that compute(k,n)=(4,8)and(4,9)biadjoint amplitudes,*** an example of the evaluation of matrices of Feynman diagrams,we present the complete form of the(4,8)and(4,9)biadjoint *** also start a study of higher-dimensional arrays of Feynman diagrams,including the combinatorial version of the duality between(k,n)and(n-k,n)objects.

关键词： Feynman diagrams biadjoint amplitudes tropical Grassmannian

Model of Mediating Determinants of Time Differences in INDYCAR

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Journalism and Mass Communication 2024年第4期14卷 232-240页

作者： Wilfrido Isidro Aldana Balderas Héctor Daniel Molina Ruiz Enrique mart.nez Muñoz Eleazar Villegas González Tirso Javier Hernández Gracia Arturo Sánchez Sánchez Cruz García Lirios alfredo Barrera Escobar University of México HuehuetocaMèxico University of Hidalgo PachucaMèxico University of Tlaxcala Mèxico University of CDMX Mexico University of FV Mexico

The IndyCar series distinguishes itself by providing the same design and operation of the single-seater to its *** difference in times is then attributable to the skills of the drivers,but considering the data from the races could test this *** objective of this work was to establish a trajectory model to predict race times.A cross-sectional,correlational,and explanatory work was carried out with a sample of 18,474 records in the period from 2020 to 2023 of the IndyCar *** results show that the time span predicts the time *** relation to the studies of acceptance of the technology,the adjustment of this to human capacities to explain the time differences in the series of racing cars is discussed.

关键词： time differences ranking differences ranking race time laps completed

Insights into induction of the immune response by the hepatitis B vaccine

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World Journal of Gastroenterology 2022年第31期28卷 4249-4262页

作者： Federico Alejandro Di Lello alfredo Pedro mart.nez Diego martín Flichman Microbiology Universidad de Buenos Aires.Facultad de Farmacia y Bioquímica.Instituto de Investigaciones en Bacteriología y Virología MolecularBuenos Aires C1113AADArgentina Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires C1425FQBArgentina Virology Section Centro de Educación Médica e Investigaciones Clínicas Norberto Quirno“CEMIC”Buenos Aires C1431FWOArgentina Microbiology Universidad de Buenos AiresInstituto de Investigaciones Biomédicas en Retrovirus y Síndrome de Inmunodeficiencia AdquiridaBuenos Aires C1121ABGArgentina

After more than four decades of hepatitis B virus(HBV)vaccine implementation,its safety and efficacy in preventing HBV infection have been proven and several milestones have been *** countries have included HBV immunization schedules in their health policies and progress has been made regarding universalization of the first HBV vaccine dose at *** of these actions have significantly contributed to reducing both the incidence of HBV infection and its related ***,there are still many drawbacks to *** main concerns are the deficient coverage rate of the dose at birth and the large adult population that has not been reached timely by universal ***,the current most widely used second-generation vaccines do not induce protective immunity in 5%to 10%of the population,particularly in people over 40-years-old,obese(body mass index>25 kg/m2),heavy smokers,and patients undergoing dialysis or infection with human immunodeficiency *** developed and approved novel vaccine formulations using more potent adjuvants or multiple antigens have shown better performance,particularly in difficult *** advances re-launch the expectations of achieving the World Health Organization’s objective of completing hepatitis control by 2030.

关键词： Hepatitis B virus Vaccine Immune response Antibodies Neutralizing

Identification of characteristic plant co-occurrences in neotropical secondary montane forests

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Journal of Plant Ecology 2009年第1期2卷 31-41页

作者： Miguel D.Mahecha alfredo martı´nez Holger Lange Markus Reichstein Erwin Beck Max Planck Institute for Biogeochemistry PO Box 10016407701 JenaGermany Department of Environmental Sciences Swiss Federal Institute of Technology—ETH Zurich8092 ZurichSwitzerland Bayreuth Centre for Ecology and Environmental Research University of Bayreuth95440 BayreuthGermany Fundacion Cordillera Tropical Jaime Roldos 4-80 y Huayna CapacEd.El Consorcio of.412CuencaEcuador Norwegian Forest and Landscape Institute PO Box 1151431 AsNorway

Aims Inferring environmental conditions from characteristic patterns of plant co-occurrences can be crucial for the development of conservation strategies concerning secondary neotropical ***,nomethodological agreement has been achieved so far regarding the identification and classification of characteristic groups of vascular plant species in the *** study examines botanical and,in particular,statistical aspects to beconsidered in such *** on these,we propose a novel data-driven approach for the identification of characteristic plantco-oc currences in neotropical secondary mountain *** Floristic inventory data were gathered in secondary tropical mountain forests in *** classification was performed by coupling locally adaptive isometric feature mapping,a non-linear ordination method and fuzzy-c-means *** approach was designed for dealing with underlying non-linearities and uncertainties in the inventory *** Findings The results indicate that the applied non-linear mapping in combination with fuzzy classification of species occurrence allows an effective identification of characteristic groups of co-occurring species as fuzzy-defined *** selected species indicated groups representing characteristic life-form distributions,as they correspond to various stages of forest *** the identified‘characteristic species groups’with meta-information derived from accompanying studies indicated that the clusters can also be related to habitat *** conclusion,we identified species groups either characteristic of different stages of forest succession after clear-cutting or of impact by fire or a *** expect that the proposed data-mining method will be useful for vegetation classification where no a priori knowledge is available.

关键词： secondary tropical mountain forests characteristic species groups non-linear ordination fuzzy-c-means clustering Ecuador

Machine learning insights concerning inflammatory and liver-related risk comorbidities in non-communicable and viral diseases

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World Journal of Gastroenterology 2022年第44期28卷 6230-6248页

作者： J alfredo mart.nez marta Alonso-Bernáldez Diego mart.nez-Urbistondo Juan A Vargas-Nuñez Ana Ramírezde Molina Alberto Dávalos Omar Ramos-Lopez Precision Nutrition and Cardiometabolic Health Madrid Institute of Advanced Studies-Food InstituteMadrid 28049Spain Department of Internal Medicine Hospital Universitario HM SanchinarroMadrid 28050Spain Servicio de Medicina Interna Hospital Universitario Puerta de Hierro MajadahondaMadrid 28222MajadahondaSpain Molecular Oncology and Nutritional Genomics of Cancer Madrid Institute of Advanced Studies-Food InstituteMadrid 28049Spain Laboratory of Epigenetics of Lipid Metabolism Madrid Institute of Advanced Studies-Food InstituteMadrid 28049Spain Medicine and Psychology School Autonomous University of Baja CaliforniaTijuana 22390Baja CaliforniaMexico

The liver is a key organ involved in a wide range of functions,whose damage can lead to chronic liver disease(CLD).CLD accounts for more than two million deaths worldwide,becoming a social and economic burden for most *** the different factors that can cause CLD,alcohol abuse,viruses,drug treatments,and unhealthy dietary patterns top the *** conditions prompt and perpetuate an inflammatory environment and oxidative stress imbalance that favor the development of hepatic *** stages of fibrosis can eventually lead to cirrhosis or hepatocellular carcinoma(HCC).Despite the advances achieved in this field,new approaches are needed for the prevention,diagnosis,treatment,and prognosis of *** this context,the scientific community is using machine learning(ML)algorithms to integrate and process vast amounts of data with unprecedented *** techniques allow the integration of anthropometric,genetic,clinical,biochemical,dietary,lifestyle and omics data,giving new insights to tackle CLD and bringing personalized medicine a step *** review summarizes the investigations where ML techniques have been applied to study new approaches that could be used in inflammatoryrelated,hepatitis viruses-induced,and coronavirus disease 2019-induced liver damage and enlighten the factors involved in CLD development.

关键词： Machine learning Liver inflammation Liver disease Viral diseases Comorbidity

Characterization by EBSD of Antimony-calcium Rich Phases Formed during Purification of Aluminum Scrap

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Journal of Wuhan University of Technology(Materials Science) 2013年第4期28卷 647-649页

作者： MUIZ rodrigo FLORES alfredo ORTIZ Juan roDRíGUEZ Nelly mart.nez Fernando LUNA Jesús OroZCO Pilar Faculty of Engineering Autonomous University of Coahuila Camporedondo Unit CINVESTAV Saltillo Unit Department of Metal Mechanics Technological Institute of Saltillo Faculty of Engineering Autonomous University of Zacatecas

We studied the influence of antimony on the modification rate of the silicon eutectic with sodium and/or strontium for castiig of A1-Si alloys, and introduced controlled Ca and Sb to the system and studied the resulting compounds, which were determined to be CazSb and A1Sb. Scanning electron microscopy together with the complementary technique of electron backscatter diffraction （EBSD） were used to characterize the materials. The experimental results provided the basis for us to establish that antimony removal from AI occurs mainly through the reaction （Sb）A1 ＋ 2Ca = Ca^Sb ＋ A1.

关键词： aluminum alloys antimony contamination modification

Comparing the biogeochemical functioning of two arid subtropical coastal lagoons:the effect of wastewater discharges

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Ecosystem Health and Sustainability 2021年第1期7卷 49-60页

作者： Julio Medina-Galván Carmen Cristina Osuna-mart.nez Gustavo Padilla-Arredondo martín Gabriel Frías-Espericueta Ramón Héctor Barraza-Guardado Joséalfredo Arreola-Lizárraga Facultad de Ciencias del Mar Universidad Autónoma de SinaloaMazatlánMéxico Programa de Planeación Ambiental y Conservación Centro de Investigaciones Biológicas del NoroesteS.C.GuaymasMéxico Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora HermosilloMéxico

Nutrient flux,net metabolism,and N2 fixation and denitrification processes were estimated and compared in two semi-arid subtropical coastal lagoons in the Gulf of California:El Soldado(ES),where no wastewater is discharged,and El Rancho(ER),where shrimp farm effluents are regularly *** processes were evaluated with the LOICZ *** time wasrom coastal *** and ES both showed autotrophic metabolism and N2 fixation in the spring,autumn,and winter,but heterotrophic metabolism and denitrification in the *** dominated in ER(−2.21 mmol m^(2)day^(−1))and values were higher than those estimated in ES(−0.45 mmol m^(2)day^(−1)).The comparative analysis between ES and ER evidenced the significant changes in its biogeochemical performance caused by the input of anthropogenic nutrients,and can orient the environmental management of coastal lagoons.

关键词： Coastal lagoons nutrient budgets net ecosystem metabolism Gulf of California

Microstructural Feature of As-cast A-356 Alloy Modifiers with the Addition of Sro

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Journal of Wuhan University of Technology(Materials Science) 2014年第3期29卷 617-619页

作者： MU?IZ rodrigo FLORES alfredo ORTIZ Juan roDRíGUEZ Nelly mart.nez Fernando OroZCO Pilar LUNA Jesús Equihua Fabián García Adrián Faculty of Engineering Autonomous University of Coahuila Camporedondo UnitSaltillo Coahuila México CINVESTAV Saltillo Unit Department of Metal Mechanics Technological Institute of Saltillo Faculty of Engineering Autonomous University of Zacatecas FIME Autonomous University of Coahuila Unit

To explore the effect of strontium on the structure of as-cast A356 alloy, the strontium was incorporated to the alloy by metallothermic reduction of Sro where the mineral was added to the melt through the submerged powders injection technique. The evaluation of the modification of the eutectie silicon and the chemical analysis of samples were done using optical microscopy （OP） and inductively coupled plasma （ICP）, respectively, while microstructural analyses by scanning electron microscopy （SEM）, and the injection time was variable. Magnesium was added to the melt to increase the reactivity and reduce the surface tension of the molten aluminum. It was possible to increase the strontium content from 0 to 0.027% after 20 minutes treatment. This concentration was sufficient to bring about full modification structure of eutectic silicon of as cast alloy A 356 and the acceptable quality metallurgical of alloy.

关键词： modification microstmcture strontium eutectic silicon submerged powder injection

Healthy diet,depression and quality of life:A narrative review of biological mechanisms and primary prevention opportunities

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World Journal of Psychiatry 2021年第11期11卷 997-1016页

作者： Octavio Pano Elena H mart.nez-Lapiscina Carmen Sayón-Orea Miguel Angel mart.nez-Gonzalez Jose alfredo mart.nez Almudena Sanchez-Villegas Preventive Medicine and Public Health University of NavarrePamplona 31008Spain Department of Neurology Center of Neuroimmunology Hospital Clinic of BarcelonaInstitut d’Investigacions Biomèdiques August Pi SunyerBarcelona 08036Spain Department of Preventive Medicine and Public Health University of NavarraPamplona 31008Spain IdiSNA Navarra Institute for Health ResearchPamplona 31008Spain Department of Public Health Navarra Institute of Public Health and EpidemiologyPamplona 31003Spain CIBER Pathophysiology of Obesity and Nutrition Institute of Health Carlos IIIMadrid 28049Spain Department of Nutrition Harvard T.H.Chan School of Public HealthBostonMA 02115United States Department of Food Sciences and Physiology University of NavarrePamplona 31008Spain Precision Nutrition and Cardiometabolic Health Program IMDEA Food InstituteMadrid 28049Spain Department of Clinical Sciences University of Las Palmas Gran CanariaLas Palmas Gran Canaria 35080Spain

Unipolar depressive disorder(UDD)affects more than 264 million people worldwide and was projected well before the severe acute respiratory syndrome coronavirus 2 pandemic to be the leading cause of disability-adjusted life years lost in *** is imperative for leading economies to implement preventive strategies targeted towards UDD,given consistent policies are currently *** established similarities between the aetiological hypotheses of depression and cardiometabolic diseases are shifting paradigms within this *** is believed that dietary practices could potentially reduce the incidence of depression;similar to their effects on ***,the aim of this review was to compile current evidence on healthy dietary patterns as suitable contributors towards primary prevention strategies against *** of the well-known biological mechanisms behind depression have been positively associated with healthful diets and dietary patterns to varying ***,a common factor of UDD is the production and overall effects of inflammatory cytokines,such as interleukin-6,tumor necrosis factor-α,and Creactive *** compounds have been associated with depressive symptoms,disturbances in neuroendocrine function,leaky gut,monoamine activity and brain function,while also being key factors in the development of cardiometabolic *** Mediterranean diet(MD)in particular,is well supported by first-level evidence regarding its preventive qualities against metabolic and cardiovascular diseases and thus considered a model for healthy eating by various *** one of the few clinical trials investigating these associations,the PREDIMED trial,individuals with diabetes assigned to a MD supplemented with mixed tree nuts experienced a 41%relative risk reduction for developing ***,there is a need to include health related quality of life as an indicator of physical and mental well-being,considering its putative associations

关键词： Depression Nutrition Mediterranean Quality of life Primary prevention Epidemiology