Diego Fernando Carrera, David Zabala‐Blanco, Cesar Vargas‐Rosales, Cesar A. Azurdia‐Meza,
An extreme learning machine (ELM)-based receiver for multi-user massive MIMO systems is introduced. The proposed ELM combining method, defined in the complex plane, is designed to directly perform MIMO combining processing to the received uplink signals, based on the adoption of the pilot symbols as training data. Numerical results show that by appropriately setting the number of hidden neurons, the ELM achieves higher spectral efficiency and smaller BER, with fewer floating-point operations than ...
Tópico(s): Advanced MIMO Systems Optimization
2020 - IEEE Communications Society | IEEE Communications Letters
Enrique Murgueitio Restrepo, Julian David Chará Orozco, Rolando Barahona Rosales, César Augusto Cuartas Cardona, J. F. Ramírez,
Intensive silvopastoral systems (iSPS) are emerging as a tool for mitigation and adaptation of cattle ranching to climate change (CC). Under iSPS, 12 times more beef is produced than under extensive pastures and 4.5 more beef than under improved pastures without trees, but methane (CH4) emissions do not increase in the same proportion being 6.8 and 2.8 higher in the iSPS, respectively. In consequence, methane emissions per ton of beef produced are 1.8 times lower in the iSPS as compared with extensive ...
Tópico(s): Rabbits: Nutrition, Reproduction, Health
2014 - Autonomous University of Yucatán | Tropical and Subtropical Agroecosystems
Andrés López‐Cortés, Paola Leone, Byron Freire‐Paspuel, Nathaly Arcos-Villacís, Patricia Guevara-Ramírez, Felipe Rosales, César Paz‐y‐Miño,
Breast cancer is the leading cause of cancer-related death among women worldwide. AKT1 encodes the kinase B alpha protein. The rs121434592, rs12881616, rs11555432, rs11555431, rs2494732, and rs3803304 single nucleotide polymorphisms have been identified in the AKT1 kinase gene. Activated AKT1 phosphorylates downstream substrates regulating cell growth, metabolism, apoptosis, angiogenesis, and drug responses. It is essential to know how breast cancer risk is associated with histopathological and ...
Tópico(s): Ubiquitin and proteasome pathways
2018 - Hindawi Publishing Corporation | BioMed Research International
José Luis Bermúdez, Néstor Rosales, César Loreto, Beltrán Briceño, Ever Morales,
Tópico(s): Marine Bivalve and Aquaculture Studies
2004 - Springer Science+Business Media | World Journal of Microbiology and Biotechnology
Jeri L. Anderson, J LAI, Ellen Dotson, Celia Cordón‐Rosales, Cesar Cilento Ponce, Douglas E. Norris, C BENBEARD,
Triatoma dimidiata, one of the major vectors of Chagas disease in Central America, is found in both domestic and peri-domestic habitats. Questions concerning population boundaries, infestation rates, insecticide resistance, and geographic dispersal of triatomine bugs persist and may be resolved using genetic markers such as microsatellites. Microsatellites are short tandem repeats found dispersed throughout a genome and can be useful for genotypic identification. We developed a plasmid library from ...
Tópico(s): Helminth infection and control
2002 - Elsevier BV | Infection Genetics and Evolution
César A. Rosales-Nieto, César A. Meza‐Herrera, Felipe de Jesús Morón Cedillo, M. Flores, Héctor Guillermo Gámez Vázquez, Felipe de Jesús Ventura Pérez, Shimin Liu,
Tópico(s): Animal Nutrition and Health
2016 - Springer Science+Business Media | Tropical Animal Health and Production
Olivia Sánchez-Cabral, Dina Martínez-Mendoza, Sebastian Fernandez‐Bussy, Berenice López-González, Carolina Perea-Talamantes, Rosa María Rivera-Rosales, César Luna-Rivero, José Arturo Martínez-Orozco, Luis Felipe Flores-Suárez, Patricio Santillán‐Doherty, Gustavo Reyes‐Terán,
Transbronchial lung cryobiopsy (TLCB), performed with a flexible cryoprobe, is an interventional pulmonology procedure that has proved its diagnostic value for interstitial pulmonary disease. However, it has not been explored extensively as a diagnostic tool for patients with non-interstitial lung pathology, including infectious and malignant diseases.To evaluate the diagnostic yield and safety of an interventional pulmonology approach that integrates TLCB and bronchoalveolar lavage (BAL) for the ...
Tópico(s): Medical Imaging and Pathology Studies
2017 - Karger Publishers | Respiration
César A. Rosales-Nieto, César A. Meza‐Herrera, F.J. Morón Cedillo, M. Flores, Héctor Gamez Vázquez, Venancio Cuevas Reyes, S.M. Liu,
The aim of this study was to test if supplemental vitamin E during late gestation and early lactation to ewes facing a moderate nutritional restriction and suckling lambs from different litter size and sex would affect colostrum composition and milk yield and composition. Mature Rambouillet ewes (n = 37, 22°N) receiving 70% of energy and 80% of protein requirements were randomly assigned to either of two treatments: intramuscular injections of vitamin E (VitE; n = 20, 4 IU vitamin E kg−1 of live weight) ...
Tópico(s): Effects of Environmental Stressors on Livestock
2015 - Elsevier BV | Small Ruminant Research
César Díaz-Godínez, Zayda Fonseca, Mario Néquiz, Juan Pedro Laclette, Carlos Rosales, Julio César Carrero,
Neutrophil extracellular traps (NETs) are DNA fibers decorated with histones and antimicrobial proteins from cytoplasmic granules released into the extracellular space in a process denominated NETosis. The molecular pathways involved in NETosis have not been completely understood. Classical NETosis mechanisms involve the neutrophil elastase translocation to nucleus due to the generation of reactive oxygen species (ROS) by NADPH oxidase (NOX2) or the peptidyl arginine deiminase 4 (PAD4) activation in ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2018 - Frontiers Media | Frontiers in Cellular and Infection Microbiology
Olivia Sánchez-Cabral, Dina Martínez-Mendoza, Sebastian Fernandez‐Bussy, Esmeralda Aspuru-García, Rosa María Rivera-Rosales, César Luna-Rivero, José Arturo Martínez-Orozco, Gustavo Reyes‐Terán,
<b><i>Background:</i></b> There are few published studies about the usefulness of endobronchial ultrasound (EBUS) in patients infected with human immunodeficiency virus (HIV). The clinical spectrum of likely diseases in this population is varied and differs from patients not infected with HIV. <b><i>Objective:</i></b> The aim of this study was to measure the usefulness of EBUS-guided transbronchial needle aspiration (EBUS-TBNA) in HIV-infected patients with ...
Tópico(s): Salivary Gland Tumors Diagnosis and Treatment
2017 - Karger Publishers | Respiration
Katherine Castro, César Rosales,
Let $M$ be a weighted manifold with boundary $\partial M$, i.e., a Riemannian manifold where a density function is used to weight the Riemannian Hausdorff measures. In this paper we compute the first and the second variational formulas of the interior weighted area for deformations by hypersurfaces with boundary in $\partial M$. As a consequence, we obtain variational characterizations of critical points and second order minima of the weighted area with or without a volume constraint. Moreover, in the ...
Tópico(s): Nonlinear Partial Differential Equations
2014 - Elsevier BV | Journal of Geometry and Physics
Antonio Cañete, César Rosales,
We consider a smooth Euclidean solid cone endowed with a smooth homogeneous density function used to weight Euclidean volume and hypersurface area. By assuming convexity of the cone and a curvature-dimension condition, we prove that the unique compact, orientable, second order minima of the weighted area under variations preserving the weighted volume and with free boundary in the boundary of the cone are intersections with the cone of round spheres centered at the vertex.
Tópico(s): Nonlinear Partial Differential Equations
2014 - Springer Science+Business Media | Calculus of Variations and Partial Differential Equations
Jorge Osada, Miguel D. Rojas, César Rosales, Johann M. Vega‐Dienstmaier,
Antecedentes: La ansiedad y la depresión son síndromes psiquiátricos con gran prevalencia en el mundo (5-50%)que por lo general se presentan juntos y generan a la sociedad una importante carga social y económica. Losalumnos universitarios, especialmente los que tienen alta carga académica como los estudiantes de medicina, sonvulnerables a estos trastornos. Objetivos: Determinar la prevalencia de sintomatología ansiosa y depresiva en alumnosde medicina y relacionarla a variables como edad, sexo y ...
Tópico(s): Aging, Health, and Disability
2013 - Cayetano Heredia University | Revista de Neuro-Psiquiatría
Laura Nely Sánchez-Morales, Giner Alor‐Hernández, Viviana Yarel Rosales-Morales, Cesar Augusto Cortes-Camarillo, José Luis Sánchez-Cervantes,
Commercial mobile devices vary in brand, size, and functionalities, but they all allow people to interact with educational applications. In software engineering, application development techniques, approaches, methodologies, and processes (e.g., BBD, FDD, RAD, DDD) are often time consuming, costly, or aim at expert developers – which implies that users outside the software development field (e.g., teachers) need great practice to become experienced application developers. This work proposes an artificial- ...
Tópico(s): Wikis in Education and Collaboration
2019 - Elsevier BV | Computer Standards & Interfaces
For constant mean curvature surfaces of class C 2 immersed inside Sasakian sub-Riemannian 3-manifolds we obtain a formula for the second derivative of the area which involves horizontal analytical terms, the Webster scalar curvature of the ambient manifold, and the extrinsic shape of the surface. Then we prove classification results for complete surfaces with empty singular set which are stable, i.e., second order minima of the area under a volume constraint, inside the 3-dimensional sub-Riemannian ...
Tópico(s): Geometric and Algebraic Topology
2011 - Springer Science+Business Media | Calculus of Variations and Partial Differential Equations
César Rosales, Antonio Cañete, Vincent Bayle, Frank Morgan,
We study the isoperimetric problem for Euclidean space endowed with a continuous density. In dimension one, we characterize isoperimetric regions for a unimodal density. In higher dimensions, we prove existence results and we derive stability conditions, which lead to the conjecture that for a radial log-convex density, balls about the origin are isoperimetric regions. Finally, we prove this conjecture and the uniqueness of minimizers for the density exp $$(|x|^2)$$ by using symmetrization techniques.
Tópico(s): Geometric Analysis and Curvature Flows
2007 - Springer Science+Business Media | Calculus of Variations and Partial Differential Equations
Tópico(s): Geometric and Algebraic Topology
2007 - Springer Nature | Mathematische Annalen
Tópico(s): Advanced Differential Geometry Research
2006 - Springer Science+Business Media | Journal of Geometric Analysis
We prove that the isoperimetric profile of a convex domain Ω with compact closure in a Riemannian manifold (M n+1 , g) satisfies a second-order differential inequality that only depends on the dimension of the manifold and on a lower bound on the Ricci curvature of Q. Regularity properties of the profile and topological consequences on isoperimetric regions arise naturally from this differential point of view. Moreover, by integrating the differential inequality, we obtain sharp comparison theorems: ...
Tópico(s): Dermatological and Skeletal Disorders
2005 - Indiana University | Indiana University Mathematics Journal
We study the problem of existence of regions separating a given amount of volume with the least possible perimeter inside a Euclidean cone. Our main result shows that nonexistence for a given volume implies that the isoperimetric profile of the cone coincides with the one of the half-space. This allows us to give some criteria ensuring existence of isoperimetric regions: for instance, local convexity of the cone at some boundary point. We also characterize which are the stable regions in a convex ...
Tópico(s): Advanced Mathematical Modeling in Engineering
2004 - American Mathematical Society | Transactions of the American Mathematical Society
Ana Hurtado, Manuel Ritoré, César Rosales,
We prove that any C2 complete, orientable, connected, stable area-stationary surface in the sub-Riemannian Heisenberg group H1 is either a Euclidean plane or congruent to the hyperbolic paraboloid t=xy.
Tópico(s): Advanced Differential Geometry Research
2009 - Elsevier BV | Advances in Mathematics
We consider area-stationary surfaces, perhaps with a volume constraint, in the Heisenberg group H1 endowed with its Carnot–Carathéodory distance. By analyzing the first variation of area, we characterize C2 area-stationary surfaces as those with mean curvature zero (or constant if a volume-preserving condition is assumed) and such that the characteristic curves meet orthogonally the singular curves. Moreover, a Minkowski-type formula relating the area, the mean curvature, and the volume is obtained ...
Tópico(s): Point processes and geometric inequalities
2008 - Elsevier BV | Advances in Mathematics
Jesús Rosales Carreón, César García‐Díaz,
This paper examines the use of qualitative information in the construction of an agent-based model in order to study the growth of near-Zero Energy Buildings (nZEB's) in the Netherlands through the innovation systems perspective.Drawing on desktop research and semi-structured interviews, this paper offers two major findings.First, we observed that the difficulties to the development of nZEB's have been shaped by interaction and institutional barriers: the inner complexity of the building sector has ...
Tópico(s): Urban Planning and Valuation
2015 - University of Surrey | Journal of Artificial Societies and Social Simulation
We consider the isoperimetric problem of minimizing perimeter for given volume in a strictly convex domain Q c R n+1 and prove that, if Q is rotationally symmetric about some line, then any solution to this problem must be convex.
Tópico(s): Point processes and geometric inequalities
2003 - Indiana University | Indiana University Mathematics Journal
Produção Nacional
Revisado por pares
Anna Carla Goldberg, J.M. Chiarella, Maria Lúcia Carnevale Marin, César Rosales, Dalma Maria Banic, Marco Aurelio Tuena de Oliveira, H. Rodrigues, C. Viggiani, Jorge Kalil,
In the present paper we show data obtained from a normal population with a racially mixed profile typical of the city of São Paulo, State of São Paulo. Data were generated with polymerase chain reaction using sequence specific primers (PCR-SSP) for HLA-DRB and polymerase chain reaction followed by hybridization with sequence specific oligonucleotide probes (PCR-SSO) for HLA-DQA1 and HLA-DQB1 loci. HLA-DRB, DQA1, DQB1 and haplotype frequencies as well as common linkage disequilibria were found. This ...
Tópico(s): T-cell and B-cell Immunology
1998 - Brazilian Society of Genetics | Genetics and Molecular Biology
Luis Rizo-Domínguez, D. Muñoz-Rodríguez, Cesar Vargas‐Rosales, Deni Torres-Román, Julio César Ramírez Pacheco,
TCP is the most used transport protocol in the Internet and it relies on RTT (Round Trip Time) predictions for the retransmission control algorithm. Most of the algorithms reported in the literature consider memoryless traffic characteristics and do not study the performance under heavy tailed scenarios present in the Internet. In this paper, an algorithm for RTT prediction in a heavy-tailed environment is introduced, and it is shown to follow closely and accurately the actual RTT. The proposed algorithm ...
Tópico(s): Mobile Ad Hoc Networks
2014 - IEEE Communications Society | IEEE Communications Letters
César Díaz-Godínez, Joshue Fabián Jorge-Rosas, Mario Néquiz, Santiago Martínez‐Calvillo, Juan Pedro Laclette, Carlos Rosales, Julio César Carrero,
NETosis is a neutrophil process involving sequential steps from pathogen detection to the release of DNA harboring antimicrobial proteins, including the central generation of NADPH oxidase dependent or independent ROS. Previously, we reported that NETosis triggered by Entamoeba histolytica trophozoites is independent of NADPH oxidase activity in neutrophils, but dependent on the viability of the parasites and no ROS source was identified. Here, we explored the possibility that E. histolytica trophozoites ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2021 - Multidisciplinary Digital Publishing Institute | Antioxidants
Sergio Zambrano-Villa, Disney M. Rosales-Borjas, Julio César Carrero, L Ortíz-Ortíz,
Protozoan pathogens such as Plasmodium, Leishmania, Trypanosoma and Entamoeba are responsible for several of the most widespread and lethal human diseases. Their successful survival depends mainly on evading the host immune system by, for example, penetrating and multiplying within cells, varying their surface antigens, eliminating their protein coat, and modulating the host immune response. Immunosuppression is sometimes caused directly by parasite products and sometimes involves antigenic mimicry, ...
Tópico(s): Malaria Research and Control
2002 - Elsevier BV | Trends in Parasitology
Produção Nacional
Revisado por pares
Luis Rosales, César Núñez, M. Pacheco, A. Latgé, P. A. Orellana,
In this work, we study thermoelectric properties of graphene nanoribbons with side-attached organic molecules. By adopting a single-band tight binding Hamiltonian and the Green's function formalism, we calculated the transmission and Seebeck coefficients for different hybrid systems. The corresponding thermopower profiles exhibit a series of sharp peaks at the eigenenergies of the isolated molecule indicating that the system can be proposed as a molecular thermo-device. We have studied the effects ...
Tópico(s): Advanced Thermoelectric Materials and Devices
2013 - American Institute of Physics | Journal of Applied Physics
Jesús Salgado Criado, Carlos Mataix-Aldeanueva, Santiago Nardini, Cecilia López-Pablos, Mara Balestrini, César Said Rosales Torres,
Ethical and governance issues regarding digital innovations developments like Artificial Intelligence have attracted abundant debate and research. Many perspectives – societal, engineering, research, management and policymaking – have been extensively analysed in an attempt to understand the role of the different stakeholders in minimising risks and amplifying opportunities. Interestingly, however, the investment community has been scarcely studied, despite the critical role of financing in technology ...
Tópico(s): Entrepreneurship Studies and Influences
2024 - Elsevier BV | Technological Forecasting and Social Change