Resultados de búsqueda - ((((sumar OR sumoa) OR sum) OR (((some OR usuma) OR (asumen OR same)) OR auuusumooe)) OR uusuma)*

Analysis of multiple change-points in normally distributed series por Garza Venegas, Jorge Arturo

“…Maximum Likelihood estimators for change-points as well as for parameters were developed considering three cases based on single step change problem: (1) multiple changes only in the mean, (2) multiple changes only in variance and (3) multiple changes in both parameters at the same time. Obtaining these change-points MLEs could be considered as an optimization problem, so a Construction Heuristic and a Genetic Algorithm (Evolutionary) were developed based on them. …”
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Molecular dynamics of free and graphite-supported Pt-Pd nanoparticles por Fernández Navarro, Carlos Javier, Mejía Rosales, Sergio

“…The melting transition temperature was found to increase when the particle is on the graphite support, with an increase at least 180 K higher than that of the same-sized free nanoparticle. The results of the density distributions perpendicular to the surface indicate that the Pd atoms have a tendency to remain at the surface, and the Pd atoms wet the graphite surface more than the Pt atoms, while root mean squares suggest that surface melting starts from the cluster surface, and surface melting was seen in both free and graphite-supported nanoparticles. …”
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Analysis of multiple change-points in normally distributed series por Garza Venegas, Jorge Arturo

“…Maximum Likelihood estimators for change-points as well as for parameters were developed considering three cases based on single step change problem: (1) multiple changes only in the mean, (2) multiple changes only in variance and (3) multiple changes in both parameters at the same time. Obtaining these change-points MLEs could be considered as an optimization problem, so a Construction Heuristic and a Genetic Algorithm (Evolutionary) were developed based on them. …”
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Estrategias de retención de empleados eficientes: Importancia estratégica de la fidelización de los empleados en organizaciones internacionales. por Barragán, J., Castillo, P., Villalpando, P., Guerra, P.

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Del sabio al intelectual: revisión del circuito de la comunicación en cinco obras del Dr. José Eleuterio González por Gallegos Jiménez, Nancy Verónica

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El papel de la industria maquiladora en Ciudad Juarez por Castellanos, Araceli

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Los retos de la cadena de suministro ante la pandemia de COVID-19 por Casillas-Álvarez, Héctor Ramón, Ortiz-Barrera, Manuel Alfredo

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Review of plants with hepatoprotective activity evaluated in Mexico por Torres González, Liliana, Waksman de Torres, Noemí, Pérez Meseguer, Jonathan, Muñoz Espinosa, Linda Elsa, Salazar Aranda, Ricardo, Cordero Pérez, Paula

“…Liver diseases represent a major health problem around the world. in Mexico these are the 5th leading cause of death in the economically active population. in Mexico, it is estimated that about 60% of the population uses some medicine from plants to treat their illnesses. …”
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One-Step Green Synthesis of Metallic Nanoparticles Using Sodium Alginate por Valdez, Jesús, Gómez, Idalia

“…Currently, traditional physical and chemical methods can synthesize these nanoparticles but their disadvantages such as costs, time, effectiveness, and toxicity of precursors provide a wide range of problems for the synthesis of these nanoparticles. Recently, some natural polymers and organic compounds have been used for the synthesis of nanoparticles by green methods. …”
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Synthesis and characterization of metal nanoparticles by pulsed laser ablation in liquid media (PLAL) por Mendivil Palma, María Isabel

“…In this thesis we report an easy, fast, alternative-novel and one-step method for the preparation of pure and stable (in some cases) noble metal nanoparticles, viz Pulsed Laser Ablation in liquid media; this method presents significant advantages over chemical routes as: pure metal nanoparticles production, less aggregation, non-vacuum requirements, non-toxic agents are required, size and shape tunability, between others. …”
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Mini-review: Ferrite nanoparticles in the catalysis por Kharisov, Boris I., Rasika Dias, H.V., Kharissova, Oxana Vasilievna

“…Catalytic applications include the use of mainly cobalt, nickel, copper, and zinc ferrites, as well as their mixed-metal combinations with Cr, Cd, Mn and sometimes some lanthanides. Core–shell nanostructures with silica and titania are also used without loss of magnetic properties. …”
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Uterus transplants and Mexico’s rule of law por Palacios González, César, Mendoza Cárdenas, Héctor A.

“…Uterus Transplantation is a new fertility treatment for some women who lack a functioning uterus. The number of countries where these transplants are performed has steadily increased, and in Mexico, there is a growing interest in this procedure among patients, researchers, and clinicians. …”
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Empowerment of Women through Political Participation: Oportunidades’ performance in an indigenous community of Oaxaca. por Avila Jaquez, Carmen

“…Then, it considers the impacts of policy in terms of the relationship between Oportunidades’ actors and the Usos y Costumbres government officials. Finally, it offers some general guidelines to improve the operation of the program in indigenous communities.…”
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Synthesis and characterization of metal nanoparticles by pulsed laser ablation in liquid media (PLAL) por Mendivil Palma, María Isabel

“…In this thesis we report an easy, fast, alternative-novel and one-step method for the preparation of pure and stable (in some cases) noble metal nanoparticles, viz Pulsed Laser Ablation in liquid media; this method presents significant advantages over chemical routes as: pure metal nanoparticles production, less aggregation, non-vacuum requirements, non-toxic agents are required, size and shape tunability, between others. …”
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Políticas públicas en la industria televisiva mexicana: Un análisis desde la perspectiva de género por Wong, Juan Enrique Huerta

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Consideraciones sobre las mudanzas necesarias en el periodismo y en la formación profesional a partir de Internet por Baldessar, María José, Corrêa, Elizabeth Saad

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ELEMENTS OF TRADITIONALISM IN LATIN AMERICAN THOUGHT por Davis, Harold

“…In this latter case it may take the form of a utopia drawn from the past, as in some of the eighteenth century French Enlightenment thought. …”
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Comprender las bases de la estadística por Badii, M. H., Guillen, A.

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VALORES DE LA FIGURA DE REY-OSTERRIETH EN PROMEDIOS, REPROBACIÓN, AGRESIVIDAD FÍSICA Y DESERCIÓN. ESTUDIO REALIZADO EN ESCOLARES DE NUEVO LEÓN, MÉXICO por Flores Aréchiga, Amador, Garza González, Marco Tulio, Llaca Díaz, Jorge, Gómez Espinel, Irene A.

“…In secondary, H 12.9, 24.3 and 41.1, in the same order. M 8.1, 7.6 and 18.4. The M obtained lower than H, except ≥9.1 average, which is higher values. …”
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Sobre la vida y obra de Severo Iglesias, (1942-2021) por Vázquez Piñón, Jorge, Oregón López, Felipe

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